Stationary volume ratio adjustment mechanism

A screw compressor with a volume ratio adjustment mechanism. The volume adjustment mechanism is a penetration in the housing of a screw compressor. The penetration includes one or more apertures. The apertures provide a flow path between the compressor outlet and an interlobe region of the screw compressor rotors. A member resides in the penetration and is movable from a first position in which the apertures are blocked and the flow path is closed and a second position in which the apertures are not blocked and the flow path is open. By unblocking the apertures and opening the flow path, the volume ratio can be adjusted.

Compressor

A compressor including a compression mechanism configured and positioned to receive vapor from an intake passage and provide compressed vapor to a discharge passage. An opening is positioned in the compression mechanism in fluid communication with the discharge passage. A valve has an aperture formed therein, the aperture configured and positioned in fluid communication with a passageway to provide a path for a pressurized vapor flow to a first chamber and a first piston without mixing with vapor in the discharge passage. A second chamber is in fluid communication with a second piston and the discharge passage, the first piston and the second piston of the valve configured to move together. First piston and second piston movement are controllable in response to predetermined conditions to maintain the magnitude of pressure of the compression mechanism immediately upstream of the opening at substantially the same pressure magnitude at the discharge passage.

Screw compressor

A screw compressor includes a casing having low and high pressure spaces, a screw rotor inserted in a cylinder part of the casing, and a slide valve disclosed in the cylinder part. The screw rotor has a plurality of helical grooves forming a compression chamber. The slide valve is moveable along an axis of the screw rotor and faces an outer periphery of the screw rotor to form a discharge port to communicating the compression chamber with the high pressure space. Fluid in the low pressure space is sucked into the compression chamber, compressed, and then discharged to the high-pressure space when the screw rotor rotates. The slide valve includes a sealing projection located on a back surface of the slide valve opposite to the screw rotor, and separating the low and high pressure spaces from each other when the sealing projection is in slidable contact with the casing.

VOLUME RATIO CONTROL SYSTEM AND METHOD

A system and method for controlling the volume ratio of a compressor is provided. The system can use a port () or ports in a rotor cylinder to bypass vapor from the compression chamber to the discharge passage of the compressor. A control valve () can be used to open or close the port or ports to obtain different volume ratios in the compressor. The control valve () can be moved or adjusted by one or more valves that control a flow of fluid to the valve. A control algorithm can be used to control the one or more valves to move the control valve to obtain different volume ratios from the compressor. The control algorithm can control the one or more valves in response to operating parameters associated with the compressor. 1. (canceled)2. A compressor comprising:an intake passage;a discharge passage;a compression mechanism, the compression mechanism being positioned to receive vapor from the intake passage and provide compressed vapor to the discharge passage;a port positioned in the compression mechanism to bypass a portion of the vapor in the compression mechanism to the discharge passage;a valve positioned near the port to control vapor flow through the port;the valve having a first position to permit a first vapor flow from the compression mechanism to the discharge passage, a second position to permit a second vapor flow from the compression mechanism to the discharge passage and a third position to prevent vapor flow from the compression mechanism to the discharge passage;the compressor having a first volume ratio in response to the valve being in the first position, a second volume ratio in response to the valve being in the second position and a third volume ratio in response to the valve being in the third position, the first volume ratio being less than the second volume ratio and the the second volume ratio being less than the third volume ratio;at least one solenoid valve, the at least one solenoid valve being positioned to control a flow of fluid to the ...

Apparatus and Method for Enhancing Compressor Efficiency

Disclosed herein is a single screw gas compressor having a housing including a cylindrical bore, a primary and secondary gate rotors mounted for rotation in the housing, each gate rotor having a plurality of gear teeth, a main rotor rotatably mounted in the bore and having a plurality of grooves and a plurality of threads, wherein each groove meshingly engages at least one of the gear teeth from each gate rotor, a primary economizer port in communication with the cylindrical bore, and a secondary economizer port in communication with the cylindrical bore. 1. A single screw gas compressor comprising:a housing including a cylindrical bore;primary and secondary gate rotors mounted for rotation in the housing, each gate rotor having a plurality of gear teeth;a main rotor rotatably mounted in the bore and having a plurality of grooves and a plurality of threads, wherein each groove meshingly engages at least one of the gear teeth from each gate rotor;a primary economizer port in communication with the cylindrical bore; anda secondary economizer port in communication with the cylindrical bore.2. The compressor of further including a first gas compression chamber created by a portion of the primary gate rotor claim 1 , a portion of a respective main rotor groove claim 1 , and the cylindrical bore claim 1 , and a second gas compression chamber created by a portion of the secondary gate rotor claim 1 , a portion of a respective main rotor groove claim 1 , and the cylindrical bore.3. The compressor of claim 2 , wherein gas is received in the first gas compression chamber via the primary economizer port during rotational operation of the main rotor.4. The compressor of claim 2 , wherein gas is received in the second gas compression chamber via the secondary economizer port during rotational operation of the main rotor.5. The compressor of claim 4 , further including a secondary discharge port opening claim 4 , wherein gas in the second gas chamber is discharged via the ...

Refrigerant Compressor

In order to further improve the sound damping in a refrigerant compressor comprising a common housing, a screw-type compressor which is provided in the common housing and has a compressor housing that is formed as part of the common housing and in which there is arranged at least one screw rotor boring, at least one screw rotor that is arranged in the screw rotor boring such as to be rotatable about a rotational axis, a suction-side bearing unit for the screw rotor that is arranged on the compressor housing, at least one pressure-side bearing unit for the screw rotor that is arranged on the compressor housing and a housing window for compressed refrigerant that is provided on the compressor housing, and a first sound absorber unit which is arranged in the common housing, it is proposed that the first sound absorber unit be arranged adjacent the housing window, and that the sound absorber unit comprise at least one chamber which is located between an inlet opening and an outlet opening and which widens out relative to the inlet opening and to the outlet opening in a direction transverse to a direction of flow. 1. A refrigerant compressor comprisinga common housing,a screw-type compressor which is provided in the common housing and has a compressor housing that is formed as part of the common housing and in which there is arranged at least one screw rotor boring, at least one screw rotor that is arranged in the screw rotor boring such as to be rotatable about a rotational axis, a suction-side bearing unit for the screw rotor that is arranged on the compressor housing, at least one pressure-side bearing unit unit for the screw rotor that is arranged on the compressor housing and a housing window for compressed refrigerant that is provided on the compressor housing,and a first sound absorber unit which is arranged in the common housing,the first sound absorber unit is arranged after the housing window, and in that the sound absorber unit comprises at least one chamber ...

Screw-Type Compressor for a Utility Vehicle

A screw compressor for a utility vehicle has at least one housing with at least one housing cover and with at least one rotor housing, at least one baffle plate and at least one seal. In the assembled state, an oil sump is present in the housing, wherein, with regard to the assembled state, the seal is arranged between housing cover and rotor housing and projects out of the oil sump. The seal at least partially separates the interior of the housing cover from the interior of the rotor housing. With regard to the assembled state, in the case of a substantially horizontal orientation of the screw-type compressor and in the case of a substantially horizontal orientation of the oil sump, the baffle plate is oriented substantially parallel to the upper level of the oil sump. 114-. (canceled)15. A screw compressor for a utility vehicle , comprising:at least one housing with at least one housing cover and with at least one rotor housing;at least one baffle plate; andat least one seal, whereinin an assembled state, an oil sump is present in the housing,in relation to the assembled state, the seal is arranged between the housing cover and the rotor housing and projects out of the oil sump,the seal at least partially separates an interior of the housing cover and an interior of the rotor housing from one another, andin relation to the assembled state, in the case of a substantially horizontal orientation of the screw compressor and in the case of a substantially horizontal orientation of the oil sump, the baffle plate is oriented substantially parallel to an upper level of the oil sump.16. The screw compressor as claimed in claim 15 , whereinthe baffle plate has at least one oil passage opening.17. The screw compressor as claimed in claim 15 , whereinthe baffle plate has multiple oil passage openings.18. The screw compressor as claimed in claim 15 , whereinthe baffle plate and the seal divide the interior of the screw compressor into multiple interconnected compartments.19. ...

Variable economizer injection position

A compressor includes a bore, a rotor disposed within the bore, a compressor inlet, and a compressor outlet. The compressor further includes a compression chamber defined between the bore and the rotor, wherein a volume of the compression chamber gradually reduces from the compressor inlet to the compressor outlet. The compressor includes an economizer. The economizer is fluidically connected to the compression chamber. The economizer is configured to inject a working fluid into the compression chamber at an injection position. The injection position is changeable according to a working condition of the compressor.

SYSTEMS AND METHODS FOR ENHANCED COMPRESSOR BEARING LIFE

The present disclosure relates to a bearing load control system that includes a force application device configured to apply a force to a bearing of a compressor and a sensor configured to provide feedback indicative of an operating parameter of the compressor. The bearing load control system also includes a controller that is communicatively coupled to the sensor and configured to determine an indication of a thrust force applied to the bearing based on the feedback indicative of the operating parameter. The controller is also configured to adjust the force application device to control the force applied to the bearing based at least in part on a control algorithm and the indication of the thrust force. 1. A bearing load control system , comprising:a force application device configured to apply a force to a bearing of a compressor;a sensor configured to provide feedback indicative of an operating parameter of the compressor; anda controller, wherein the controller is communicatively coupled to the sensor and configured to determine an indication of a thrust force applied to the bearing based on the feedback indicative of the operating parameter, wherein the controller is configured to adjust the force application device to control the force applied to the bearing based at least in part on a control algorithm and the indication of the thrust force.2. The bearing load control system of claim 1 , wherein the controller is configured to adjust the force application device to control the force claim 1 , such that a resultant force applied to the bearing is within a threshold range of a target bearing load.3. The bearing load control system of claim 1 , wherein the force and the thrust force are applied in a same direction with respect to a central axis of the compressor or applied in substantially opposite directions with respect to the central axis of the compressor.4. The bearing load control system of claim 1 , wherein the sensor is configured to provide additional ...

SUPERCHARGER WITH INTEGRATED CONTRACTION CHAMBER FOR NOISE ATTENUATION

A supercharger for a vehicle includes a lower body housing a compressor and an upper lid having a contraction chamber. The upper lid includes an air circulation port and is configured to be coupled to the lower body thereby forming a plenum. The contraction chamber is integrally formed in the upper lid adjacent to the air circulation port and includes an attenuator plate that defines a tuning neck. The tuning neck defines an inlet to and part of a volume of the contraction chamber, and includes a predetermined size and shape configured to attenuate a desired sound frequency generated by operation of the supercharger. 1. A supercharger for a vehicle , the supercharger comprising:a lower body housing a compressor;an upper lid configured to be coupled to the lower body thereby forming a plenum, the upper lid defining an air circulation port; anda contraction chamber integrally formed in the upper lid adjacent to the air circulation port, the contraction chamber including an attenuator plate defining a tuning neck, the tuning neck defining an inlet to and part of a volume of the contraction chamber;wherein the tuning neck includes a predetermined size and shape configured to attenuate a desired sound frequency generated by operation of the supercharger.2. The supercharger of claim 1 , wherein the contraction chamber is positioned entirely in the upper lid.3. The supercharger of claim 1 , wherein the upper lid extends along a longitudinal length from a rear side to an opposed upstream front side and between opposed lateral sides claim 1 , the air circulation port being disposed at the front side; andwherein the attenuation plate is positioned perpendicular to a longitudinal axis of the upper lid that extends parallel to the longitudinal length, and the tuning neck includes a predetermined length in a direction of the longitudinal axis that is configured to attenuate the desired sound frequency.4. The supercharger of claim 3 , wherein the predetermined shape of the tuning ...

Screw compressor slide valve and screw compressor with gas pulsation attenuation function

A screw compressor slide valve with gas pulsation attenuation function includes valve walls and internal through holes. A screw compressor includes the screw compressor slide valve. A part of exhausted gas of the screw compressor is directly discharged from an exhaust port to an exhaust chamber to form a main exhaust flow channel; another part of the exhausted gas is discharged from the exhaust port into the exhaust chamber after being delayed by the internal through holes, which forms a branched exhaust flow channel. Since the branched exhaust flow channel is longer than the main exhaust flow channel, when the gas pulsation in the branched exhaust flow channel lags behind that in the main exhaust flow channel by 180-degree in phase, two gas pulsations in the two flow channels are offset due to opposite gas pulsation phases, which attenuates the gas pulsation, thereby suppressing induced vibration and noise.

OIL-FREE SCREW COMPRESSOR

The oil-free screw compressor includes: a screw rotor, a bearing configured to support a rotor shaft, a shaft seal device including an oil seal arranged at a position closer to the bearing and a gas seal arranged on at a position closer to the rotor chamber, an atmosphere communication space communicating with an atmosphere communication hole, and an oil return groove including a return inclined surface inclined so as to expand in diameter radially outward from a gas seal-side end to an oil seal-side end. The oil seal portion is a viscoseal including a spiral groove portion. An inner peripheral surface of the oil seal includes an inner peripheral boundary portion that defines a part of the atmosphere communication space, on a side closer to the bearing in the atmosphere communication hole. The oil seal-side end is arranged in a vicinity of the inner peripheral boundary portion and at a position closer to the bearing. 1. An oil-free screw compressor comprising:a screw rotor accommodated in a rotor chamber of a casing of a compressor;a bearing configured to support a rotor shaft of the screw rotor;a shaft seal device arranged in a shaft seal space of the casing, the shaft seal space being formed between the rotor chamber and the bearing, the shaft seal device including an oil seal arranged at a position closer to the bearing and a gas seal arranged at a position closer to the rotor chamber;an atmosphere communication space formed between an oil seal portion formed in any one of the oil seal and the rotor shaft and a gas seal portion of the gas seal, the atmosphere communication space communicating with an atmosphere communication hole; andan oil return groove formed on the rotor shaft, the oil return groove including a return inclined surface inclined so as to expand in diameter radially outward from a gas seal-side end to an oil seal-side end of the return inclined surface,wherein the oil seal portion is a viscoseal including a spiral groove portion,wherein an inner ...

COMPRESSOR DEVICE AS WELL AS THE USE OF SUCH A COMPRESSOR DEVICE

Compressor device that is at least provided with a screw compressor with a compression chamber that is formed by a compression housing, with a drive motor that is provided with a motor chamber formed by a motor housing and with an outlet for the discharge of compressed air that is connected to a pressure vessel via an outlet pipe, whereby the compression housing and the motor housing are connected directly to one another to form a compressor housing, whereby the motor chamber and the compression chamber are not sealed off from one another and whereby the outlet pipe between the pressure vessel and the screw compressor is free of closing means. 137-. (canceled)38. A compressor device comprising:a screw compressor with a compression chamber that is formed by a compression housing, in which a pair of meshed compressor rotors in the form of a screw are rotatably mounted;a drive motor that is provided with a motor chamber formed by a motor housing, in which a motor shaft is rotatably mounted that drives at least one of the aforementioned two compressor rotors;an inlet to the screw compressor for the supply of air;an outlet to the screw compressor for the discharge of compressed air, and which is connected to a pressure vessel via an outlet pipe;an air outlet on the pressure vessel for the supply of compressed air from the pressure vessel to a consumer; an inlet valve on the inlet of the screw compressor; and,', 'a tap or valve to close and open the air outlet of the pressure vessel;, 'a control system for controlling one or more liquid or gas flows in the compressor device; said control system being provided withwherein the compression housing and the motor housing are connected directly to one another to form a compressor housing, whereby the motor chamber and the compression chamber are not sealed off from one another and whereby the outlet pipe between the pressure vessel and the screw compressor is free of closing means in order to enable a flow through the outlet ...

Screw Compressor

A screw compressor is provided which can reduce the pressure loss in a suction flow passage. A casing of the screw compressor includes a bore that accommodates a lobed portion A of a male rotor A and a lobed portion B of a female rotor B therein such that working chambers are formed in lobe grooves of the lobed portions, a suction port located on an outer side in a rotor radial direction, and a suction flow passage that communicates in a rotor axial direction with working chambers that are in a suction stroke. The suction flow passage includes a male rotor side suction flow passage A located on an male rotor A side and besides on a downstream side with respect to a virtual plane C, and a female rotor side suction flow passage B located on an female rotor B side and besides on the downstream side with respect to the virtual plane C. The male rotor side suction flow passage A is formed such that a flow passage wall A on the outer side in the rotor radial direction is located at a position that is the same as that of a wall of the bore as viewed in the rotor axial direction at least within a range of one half of an axial pitch P of the lobed portion A of the male rotor A from a suction side end surface of the lobed portion A in the rotor axial direction. 1. A screw compressor , comprising:a male rotor having a lobed portion;a female rotor having a lobed portion that engages with the lobed portion of the male rotor; anda casing that accommodates the male rotor and the female rotor,the casing including a bore that accommodates the lobed portion of the male rotor and the lobed portion of the female rotor therein such that working chambers on a male rotor side and working chambers on a female rotor side are formed in lobe grooves of the lobed portions, a suction port located on an outer side in a rotor radial direction with respect to the lobed portion of the male rotor and the lobed portion of the female rotor, and a suction flow passage formed so as to connect the ...

SCREW TYPE LIQUID RING PUMP WITH INTEGRATED MACERATOR

Screw type liquid ring pump () with an integrated grinder or macerator (), including a pump housing () with an inlet () and an outlet () and an, inside the housing, rotating helical screw rotor (), which rotor at one end, the inlet end of the pump housing is provided with the grinder () and at the other end, the outlet end of the pump housing is communicating with a pressure chamber (). 1. (canceled)2. Screw pump according to claim 8 , the length and curvature of each wing of the rotary cutter varying depending on size claim 8 , capacity and angular velocity of the screw pump.3. Screw pump according to claims 8 , the stationary cutter including inwardly claims 8 , in relation to the helical screw rotor claims 8 , protruding fingers claims 8 , the plurality of cutting edges or knives of the stationary cutter being on respective ones of the fingers so as to define positive cutting angle edges thereto.4. Screw pump according to claims 8 , helical screw rotor having rotor wings extending in a direction claims 8 , the helical wings of the rotary cutter corresponding to and having the same direction as the rotor wings such that grooves defined between the fingers of the stationary cutter have a direction opposite to the direction of the helical wings.5. Screw pump according to claim 2 , the stationary cutter including inwardly claim 2 , in relation to the helical screw rotor claim 2 , protruding fingers claim 2 , the plurality of cutting edges or knives of the stationary cutter being on respective ones of the fingers so as to define positive cutting angle edges thereto.6. Screw pump according to claim 3 , the helical screw rotor having rotor wings extending in a direction claim 3 , the helical wings of the rotary cutter corresponding to and having the same direction as the rotor wings such that grooves defined between the fingers of the stationary cutter have a direction opposite to the direction of the helical wings.7. Screw pump according to claim 5 , the helical screw ...

SCREW COMPRESSOR

A screw compressor includes a screw rotor, a rotor casing accommodating the screw rotor, and an internal-volume-ratio-adjusting valve capable of changing internal volume ratio. The internal-volume-ratio-adjusting valve includes a valve body movable along an axial direction of the screw rotor and defining a gas-discharge position, and a cylinder containing at least one pressurizing chamber with a cylinder rod and a piston. The cylinder rod is coupled to the valve body and disposed along the axial direction. The piston is fixed inside the pressurizing chamber to the cylinder rod and divides the pressurizing chamber into two pressurizing spaces along the axial direction. The screw compressor further includes a first communication passage connecting one of the two pressurizing spaces with the discharge gas passage, and a second communication passage connecting the other with a just-before-discharge tooth space immediately before a tooth space that communicates with the discharge port. 1. A screw compressor comprising:a screw rotor including a pair of a male rotor and a female rotor;a rotor casing accommodating the screw rotor, the rotor casing having a suction gas passage and a suction port through which a gas is sucked and a discharge port and a discharge gas passage through which the gas is discharged; andan internal-volume-ratio adjusting valve capable of changing an internal volume ratio, a valve body disposed inside the rotor casing, the valve body being movable along an axial direction of the screw rotor and defining a discharge position at which the gas is discharged from tooth spaces formed between the screw rotor and the rotor casing to the discharge port; and', 'a cylinder containing at least one pressurizing chamber and having a cylinder rod and a piston, the cylinder rod being coupled to the valve body and being disposed along the axial direction of the screw rotor, the piston being fixed inside the or each pressurizing chamber to the cylinder rod and ...

SCREW COMPRESSOR WITH MAGNETIC GEAR

A screw compressor () includes a casing () having a suction port and a discharge port, a male rotor () rotatable relative to said casing about a first axis (A), a female rotor () rotatable relative to said casing about a second axis (B), and a magnetic gear system including a first magnetic gear () associated with said male rotor and a second magnetic gear () associated with said female rotor. The first magnetic gear and the second magnetic gear are positioned such that a magnetic field of said first magnetic gear interacts with said second magnetic gear to drive rotation of said female rotor about said second axis. 1. A screw compressor comprising:a casing having a suction port and a discharge port;a male rotor rotatable relative to said casing about a first axis;a female rotor rotatable relative to said casing about a second axis; anda magnetic gear system including a first magnetic gear associated with said male rotor and a second magnetic gear associated with said female rotor, said first magnetic gear and said second magnetic gear being positioned such that a magnetic field of said first magnetic gear interacts with said second magnetic gear to drive rotation of said female rotor about said second axis.2. The screw compressor of claim 1 , wherein said magnetic field of said first magnetic gear interacts with a magnetic field of said second magnetic gear as said first magnetic gear rotates about said first axis to drive rotation of said second magnetic gear about said second axis.3. The screw compressor of claim 2 , wherein rotation of said first magnetic gear about said first axis in first direction drives rotation of said second magnetic gear about said second axis in a second direction opposite said first direction.4. The screw compressor of claim 1 , wherein said first magnetic gear and said second magnetic gear are magnetically aligned to transmit a required torque between said first magnetic gear and said second magnetic gear.5. The screw compressor of ...

VARIABLE-CAPACITY COMPRESSOR AND REFRIGERATION DEVICE HAVING SAME

The present disclosure relates to a variable-capacity compressor () and a refrigeration device (). The variable-capacity compressor () comprises a housing (), a compression mechanism, two first suction conduits () and a variable-capacity valve (); the compression mechanism comprises two bearings () and a cylinder assembly, the cylinder assembly comprises a first cylinder () and a second cylinder (), at least one of the first cylinder () and the second cylinder () is configured as a variable-capacity cylinder, and a compression chamber () and a suction port (A) is formed in the variable-capacity cylinder; the variable-capacity valve () is disposed in the compression mechanism and configured to be movable between a communication position and an isolation position, wherein the variable-capacity cylinder operates when the variable-capacity valve () is located in the communication position, and the variable-capacity cylinder is unloaded when the variable-capacity valve () is located the isolation position. 1. A variable-capacity compressor , comprising:a housing;a compression mechanism disposed in the housing and comprising two bearings and a cylinder assembly disposed between the two bearings, in which the cylinder assembly comprises a first cylinder and a second cylinder, at least one of the first cylinder and the second cylinder is configured as a variable-capacity cylinder, and a compression chamber and a suction port is formed in the variable-capacity cylinder;two first suction conduits connected to the first cylinder and the second cylinder respectively; anda variable-capacity valve disposed in the compression mechanism and configured to be movable between a communication position where the compression chamber is communicated with the suction port and an isolation position where the compression chamber is isolated from the suction port,wherein the variable-capacity cylinder operates when the variable-capacity valve is located in the communication position, and the ...

SINGLE-STAGE COMPRESSOR AND ENERGY SYSTEM USING THE SAME

A single-stage compressor including one compressing unit, includes: a housing having a compressing chamber formed therein and including a suction port, which is located in one side of the compressing chamber and into which a working fluid enters, and an injection port, which is located on the compressing chamber to be spaced apart from the suction port by a predetermined distance and into which an intermediate-pressure working fluid is injected; and an intermediate-pressure valve installed on an intermediate-pressure fluid flow path on which the intermediate-pressure working fluid moves and configured to control supply of the intermediate-pressure working fluid so that the intermediate-pressure working fluid is supplied to the injection port in response to an intermediate pressure of the compressing chamber. In the injection-type compressor having a single chamber, a working fluid is injected at an intermediate pressure (not in the proximity of a suction pressure) so that efficiency and capability of the injection-type compressor having a single chamber can be improved. The injection-type compressor having a single chamber has a simple structure and is easily manufactured so that a pressure of an injection port and a corresponding intermediate pressure can be selectively set in various ways. 1. A single-stage compressor including one compressing unit , the single-stage compressor comprising:a housing having a compressing chamber formed therein and comprising a suction port, which is located in one side of the compressing chamber and into which a working fluid enters, and an injection port, which is located on the compressing chamber to be spaced apart from the suction port by a predetermined distance and into which an intermediate-pressure working fluid is injected; andan intermediate-pressure valve installed on an intermediate-pressure fluid flow path on which the intermediate-pressure working fluid moves and configured to control supply of the intermediate- ...

Screw Pump

The invention relates to a screw pump having two screws, in which screw pump each screw has a first thread and a second thread. The threads extend in each case from a suction side to a delivery side. The threads are in engagement with one another, with the result that the threads are divided into a plurality of working chambers, the volume of which decreases from the suction side to the delivery side. According to the invention, the threads have two thread turns. Moreover, the invention relates to a screw for a pump of this type. On account of the uniform distribution of mass of the two-turn threads, the pump can be operated at a high rotational speed, with the result that the throughput of the pump is increased. 115-. (canceled)16. A screw pump comprising:two screws, each screw having a first thread and a second thread, each of which threads has two thread turns and extends from a suction side to a delivery side, the threads engage with one another to define a plurality of working chambers having a volume that decreases from the suction side to the delivery side; anda housing in which the screws are received, said housing having a first housing section and a second housing section in the region of each thread, there being a suction gap between the housing and the thread in the first housing section, and there being a minimum radial spacing between the housing and the thread in the second housing section.17. The screw pump of claim 16 , wherein the screws have a design which is symmetrical in the longitudinal direction between the two outer ends of the threads.18. The screw pump of claim 16 , wherein a radial spacing between the housing and the thread in the region of the suction gap is at least 50 times greater than the radial minimum spacing.19. The screw pump of claim 16 , wherein the extent of the suction gap in the circumferential direction corresponds to at least 10% of a circumference of the housing surrounding the screw in the first housing section.20. The ...

Screw Compressor, Air Conditioning Apparatus and Refrigeration Apparatus

Disclosed are a screw compressor, and a gas conditioning apparatus and a refrigeration apparatus including the screw compressor. The screw compressor includes a body (), in which a gas-supplement channel is provided, and the gas-supplement channel has at least two gas-supplement holes () communicated with a compression chamber. A number of the gas-supplement holes in the screw compressor is at least two. In a case that space available in the body () for disposing the gas-supplement holes () is limited, a hole diameter of each of the gas-supplement holes () is smaller. A larger number of gas-supplement holes () with smaller hole diameter are beneficial for reducing gas flow pulsation, thereby reducing noise in a gas-supplement process. 1. A screw compressor , comprising:{'b': '10', 'a body (), comprising a housing, in which a compression chamber is provided, and'}{'b': 10', '201, 'a gas-supplement channel, disposed in the body (), the gas-supplement channel having at least two gas-supplement holes () communicated with the compression chamber.'}220110. The screw compressor according to claim 1 , wherein the gas-supplement holes () are disposed along an axial direction of the body ().3201. The screw compressor according to claim 1 , wherein a shape of cross section of each gas-supplement hole () is any one of a circle claim 1 , an ellipse claim 1 , a round rectangle and a polygon.4201201. The screw compressor according to claim 1 , wherein a radial dimension of each of the gas-supplement holes () is not greater than 6 mm claim 1 , or the radial dimension of each of the gas-supplement holes () is not less than 2 mm.5201201. The screw compressor according to claim 4 , wherein a shape of cross section of each gas-supplement hole () is a circle claim 4 , and each of the gas-supplement holes () has a diameter of 5 mm.64020140. The screw compressor according to claim 1 , further comprising a male screw () and a female screw disposed in the compression chamber; wherein at ...

Gas Compressor

A bearing oil feeding amount is appropriately controlled with respect to specifications of a discharge pressure (bearing load) and a rotation speed. A gas compressor has: a compressor main body that compresses gas and has a rotor; a bearing for supporting the rotor onto a compressor main body casing; an oil case that stores a lubricating oil to be supplied to the bearing; a lubricating oil pipe through which the lubricating oil is circulated from the oil case to the bearing; an oil pump that pumps the lubricating oil from the oil case to the bearing via the lubricating oil pipe; a flow amount control means for adjusting an amount of lubricating oil that circulates through the lubricating oil pipe; an electric motor that supplies power to the rotor; an inverter that outputs a rotation frequency of the electric motor; a pressure sensor that detects the discharge pressure of the compressor main body; and a control unit that determines a lubricating oil supply amount to the bearing on the basis of the load on the bearing corresponding to the pressure detected by the pressure sensor and the rotation speed of the rotor corresponding to the rotation frequency output by the inverter, and that controls the flow amount control means on the basis of the lubricating oil supply amount. 1. A gas compressor comprising:a compressor main body having a rotor configured to compress gas;a bearing configured to support the rotor on a compressor main body casing;a storage part in which lubricating oil to be supplied to the bearing is stored;a lubricating oil pipe through which lubricating oil flows from an oil case to the bearing;an oil pump configured to pump lubricating oil from the oil case to the bearing through the lubricating oil pipe;flow amount control means configured to adjust an amount of lubricating oil flowing through the lubricating oil pipe;an electric motor configured to supply power to the rotor;an inverter configured to output a rotation frequency of the electric motor; ...

DISCHARGE MUFFLER

A discharge muffler for a compressor is constructed as an inner duct extending inside an outer duct, the inner duct being open at each end and the outer duct being open only at the muffler inlet. The inner duct has a plurality of holes communicating with the outer duct, at least two of the holes being at different distances from the muffler outlet. 1. A discharge muffler for mounting to take discharge from a compressor , the muffler havinga muffler inlet for receiving the discharge and a muffler outlet for delivering the discharge, wherein the muffler comprises:an inner duct and an outer duct,the inner duct:extending inside the outer duct,being open at each end, andbeing provided with a plurality of holes that communicate with the outer duct, at least two of the holes being at different distances from the muffler outlet, andthe outer duct:being open at a first end in a region of the muffler inlet, andhaving a closure at a second end in a region of the muffler outlet.2. The muffler according to claim 1 , wherein the muffler is configured for use with the compressor and wherein the different distances of the at least two holes are determined in relation to wavelengths of discharge pulsations for the compressor in use at different respective speeds.3. The muffler according to claim 1 , wherein the muffler is configured for use with the compressor and wherein the compressor is a screw compressor.4. The muffler according to claim 3 , wherein the discharge is an oil/gas mixture.5. The muffler according to claim 1 , wherein the muffler inlet is provided by open ends of the inner and outer ducts and the muffler outlet is provided by an open end of the inner duct claim 1 , at the closure of the outer duct.6. The muffler according to claim 1 , wherein the closure of the outer duct at its second end is provided by a transverse wall extending inwardly from the outer duct onto the inner duct.7. The muffler according to claim 2 , wherein at least three holes are provided and said ...

DIRECT DRIVE REFRIGERANT SCREW COMPRESSOR WITH REFRIGERANT LUBRICATED BEARINGS

Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; wherein, for each rotor, the compressor includes: a plurality of bearing packs disposed within a respective plurality of bearing chambers; a working fluid disposed within each of the plurality of bearing chambers, the working fluid providing oil-free lubrication to the plurality of bearing packs; a plurality of bearing lubrication ports extending through the housing and into each of the plurality of bearing chambers, and configured for injecting the working fluid into each of the plurality of bearing chambers when the compressor is running. 1. A direct-drive refrigerant screw compressor , comprising:a housing;a compression chamber in the housing;a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile;wherein, for each rotor, the compressor includes:a plurality of bearing packs disposed within a respective plurality of bearing chambers;a working fluid disposed within each of the plurality of bearing chambers, the working fluid providing oil-free lubrication to the plurality of bearing packs;a plurality of bearing lubrication ports extending through the housing and into each of the plurality of bearing chambers, and configured for injecting the working fluid into each of the plurality of bearing chambers when the compressor is running.2. The compressor of claim 1 , wherein for each rotor:the plurality of bearing lubrication ports include a respective plurality flow control orifices.3. The compressor of claim 2 , wherein for each rotor:the plurality of bearing chambers include a forward bearing chamber and an aft bearing chamber; andthe plurality of bearing lubrication ports include a ...

Screw Compressor

A screw compressor includes: a male rotor and a female rotor including a rotor tooth section that has multiple helical teeth, the male rotor and the female rotor rotating in engagement with each other; a casing including a main casing with a bore formed to accommodate the male rotor and the female rotor , and a discharge-side casing closing a discharge side of the bore ; and a discharge passage including a discharge port that opens in a rotational axis direction of the male rotor and the female rotor on a bore side surface of the discharge-side casing , compressed gas flowing from the discharge port circulating in the discharge passage . The male rotor and the female rotor are configured such that a discharge-side end surface of the rotor tooth section serves as a discharge-side distal end of the male rotor or the female rotor in the rotational axis direction. The discharge passage includes an enlarged flow passage section formed such that the enlarged flow passage section extends from the discharge port in the rotational axis direction of the male rotor and the female rotor and that a flow passage cross-sectional area is gradually enlarged from the discharge port to a downstream side in a compressed gas flow direction. 1. A screw compressor comprising:a male rotor and a female rotor each including a rotor tooth section that has a plurality of helical teeth, the male rotor and the female rotor rotating in engagement with each other;a casing including a main casing having a bore formed in such a manner as to accommodate the male rotor and the female rotor, and a discharge-side casing closing a discharge side of the bore; anda discharge passage including a discharge port that opens in a rotational axis direction of the male rotor and the female rotor on a surface of the discharge-side casing close to the bore, compressed gas flowing from the discharge port circulating in the discharge passage, whereinthe male rotor and the female rotor are each configured such that a ...

SCREW COMPRESSOR

A screw compressor includes an internal-volume-ratio variable mechanism including a variable Vi valve configured to make a Vi value being an internal volume ratio variable. The screw compressor controls a position of the variable Vi valve in two stages. The position of the variable Vi valve when the Vi value is set to be large is set to attain a Vi value with which a compressor efficiency during operation under a predetermined high-load condition or a predetermined high-compression-ratio condition is equal to or higher than a set efficiency set in advance. 1. A screw compressor comprising an internal-volume-ratio variable mechanism including a variable Vi valve configured to make a Vi value being an internal volume ratio variable ,wherein the screw compressor controls a position of the variable Vi valve in two stages, andwherein, in an operation range of the compressor, the position of the variable Vi valve when the Vi value is set to be large is set to attain a Vi value with which a compressor efficiency during operation under a predetermined high-load condition or a predetermined high-compression-ratio condition is equal to or higher than a set efficiency set in advance.2. (canceled)3. The screw compressor of claim 1 ,wherein the position of the variable Vi valve when the Vi value is set to be small is set to attain a Vi value with which a value obtained by multiplying each of coefficients of performance at top one to top three operation loads having large weights in a primary annual performance factor calculated by applying weights for four operation loads, by the weight corresponding to the operation load is equal to or greater than a set value set in advance.4. The screw compressor of claim 1 ,wherein the internal-volume-ratio variable mechanism includesa piston coupled to the variable Vi valve; anda cylinder configured to house the piston,wherein inside of the cylinder is divided into two spatial chambers by the piston, andwherein the two spatial chambers are ...

VARIABLE ECONOMIZER INJECTION POSITION

A compressor includes a bore, a rotor disposed within the bore, a compressor inlet, a compressor outlet and a compression chamber defined between the bore and the rotor. A volume of the compression chamber gradually reduces from the compressor inlet to the compressor outlet. An economizer is configured to fluidically connect to the compression chamber. The economizer is configured to inject a working fluid into the compression chamber at an injection position. The injection position is changeable according to a working condition of the compressor. 1. A single compressor , comprisinga bore,a rotor disposed within the bore,a shaft supporting the rotor, the shaft extending in an axial direction,a compressor inlet,a compressor outlet,a compression chamber defined between the bore and the rotor, wherein a working fluid in the compression chamber is compressed and flows from the compressor inlet to the compressor outlet, andan injection port having a variable injection position along the axial direction.2. The compressor according to claim 1 , wherein the injection port is configured to fluidically connect to an economizer to receive the working fluid from the economizer to the compression chamber.3. The compressor according to claim 1 , wherein the injection port is formed by a manifold claim 1 , the manifold is configured to fluidically connect an economizer and the compression chamber claim 1 , the manifold includesa manifold inlet,two or more manifold outlets disposed downstream of the manifold inlet, the manifold outlets disposed upstream of the compression chamber.4. The compressor according to claim 1 , further comprising a manifold fluidically connecting the economizer and the compression chamber claim 1 , the manifold further including claim 1 ,a manifold inlet,a plurality of manifold outlets disposed downstream of the manifold inlet, the manifold outlets disposed upstream of the compression chamber, wherein each manifold outlet is disposed at a different ...

ADAPTOR FOR AN AIR COMPRESSOR AND AN AIR COMPRESSOR

The invention discloses an adaptor () for an air compressor (). Adaptor () includes a manifold () having an inlet () adapted to be connected to the air exhaust of at least one air tool device () having an air motor connected, in use, to the air compressor (). An outlet () is adapted to be connected, in use, to the air intake of the air compressor (), an air inlet () is open to ambient air and a valve mechanism () is adapted to, in use, close the air inlet () when a first predetermined pressure is reached by the air compressor (). 1. An adaptor for an air compressor , said adaptor including a manifold having an inlet adapted to be connected to the air exhaust of at least one air tool device having an air motor connected , in use , to said air compressor , and an outlet adapted to be connected , in use , to the air intake of said air compressor , an air inlet open to ambient air and a valve mechanism adapted to , in use , close said air inlet when a first predetermined pressure is reached by said air compressor.2. The adaptor as claimed in claim 1 , further including a pressure relief valve which opens to exhaust compressed air at a second predetermined pressure.3. The adaptor of claim 1 , wherein a plurality of said outlets are provided which are adapted to he connected to respective air intakes of a multiple cylinder air compressor.4. The adaptor of claim 1 , wherein said inlet is at one end of said manifold and said air inlet and said outlet are located on the side of said manifold.5. The adaptor of claim 1 , wherein said valve mechanism closes said air inlet at about 1 bar or 14.38 psi or higher claim 1 ,6. The adaptor of claim 1 , wherein said outlet is directly connected to the air injection device of said air compressor.7. An air compressor including a manifold having an inlet adapted to be connected to the air exhaust of at least one air tool device having an air motor connected claim 1 , in use claim 1 , to said air compressor claim 1 , and an outlet adapted ...

SCREW COMPRESSOR AND CONTROL METHOD THEREFOR

A screw compressor (), comprising a screw rotor () and a spool valve (). The screw rotor () comprises a suction head end () and an exhaust tail end (). Gas is sucked in from the suction head end () and compressed gas is discharged from the exhaust tail end (). The spool valve () comprises a working side () for sealing a compression chamber of the screw rotor (). The working side () comprises a spool valve head end () and a spool valve tail end () and can do a reciprocating motion along the axis direction of the screw rotor (). When the spool valve () moves to a suction capacity adjusting position (), the spool valve head end () is located at the inner side of the suction head end () of the screw rotor (), and a suction capacity adjusting distance (D) is formed between the spool valve head end () and the suction head end () so that the suction capacity of the screw compressor is adjusted. The suction capacity of the screw compressor () can be adjusted by means of the spool valve (), so that the problem of motor temperature and exhaust gas temperature limits of conventional variable frequency screw sets is effectively solved and the operational range and the load regulation ability of the screw compressor are expanded. 1100. Screw compressor () , characterized in that it comprises:{'b': ['110', '111', '112', '110', '111', '112'], '#text': 'a screw rotor (), which comprises a suction head end () and an exhaust tail end (), wherein the screw rotor () is configured as such that it can suck in gas from the suction head end () and discharge compressed gas from the exhaust tail end (); and'}{'b': ['120', '125', '103', '110', '125', '121', '122', '121', '122', '111', '112', '110', '110', '120', '110'], '#text': 'a spool valve (), which comprises a working side () for sealing a compression chamber () of the screw rotor (), wherein the working side () comprises a spool valve head end () and a spool valve tail end (), the spool valve head end () and the spool valve tail end () ...

SCREW COMPRESSOR

A screw compressor includes compressor bodies, a motor disposed in a side of the compressor bodies, a gear box coupled to the compressor bodies and transmitting the drive force of the motor to a screw rotor, and a tubular coupling casing coupling the gear box and the motor and having horizontal axis. The coupling casing has a work hole in the horizontal direction. The work hole is used for maintaining a coupling accommodated in the coupling casing. The coupling casing has a rib extending in the up-down direction. It is thus possible to avoid reduction in the rigidity of the coupling casing with no cost increase, and to improve maintainability. 1. A screw compressor comprising:a compressor body compressing a fluid by a screw rotor;a motor disposed in a side of the compressor body and supplying a drive force to the compressor body;a gear box coupled to the compressor body and transmitting the drive force of the motor to the screw rotor;a tubular coupling casing coupling the gear box and the motor and having a horizontal axis;an input shaft coupled to the shaft of the motor and inputting the drive force of the motor to the gear box;a coupling accommodated in the coupling casing and coupling the input shaft and the shaft of the motor;a work hole in the horizontal direction provided in the coupling casing and used for maintaining the coupling; anda rib provided in the coupling casing and extending in the up-down direction.2. The screw compressor according to claim 1 , wherein the rib extends in the vertical direction.3. The screw compressor according to claim 1 , further comprising:the compressor body including a first compressor body and a second compressor body;a bull gear coupled to the input shaft so as to be accommodated in the gear box;a first pinion gear accommodated in the gear box, coupled to the shaft of the screw rotor of the first compressor body so that the axis of the first pinion gear is disposed above the axis of the bull gear, and engaging with the bull ...

Pump

A gear pump includes a pump body which defines a cavity hole which holds a separate cavity body. The cavity body defines channels and a pump cavity holding a pair of gears. An inlet and outlet are connected to the channels. The separate cavity body may be manufactured separately and only this component needs to be manufactured to very accurate tolerances. 1. A pump system comprising:a pump body having a pair of gears located in a pump cavity and defining channels;an inlet and an outlet connected to the channels of the pump cavity; anda motor connected to a longitudinal shaft for driving the gears;wherein one of the gears is a free gear located in the pump cavity by the walls of the cavity, andthe pump body defines a cavity hole and the pump cavity and channels are defined in a cavity block mounted in the cavity hole, the cavity block being free to move laterally in the cavity hole.2. A pump system according to claim 1 , further comprising channels through the cavity block connecting the inlet and the outlet to the pump cavity claim 1 ,further comprising a shallow channel of thickness no greater than 30% of the thickness of the cavity block between the channels and the pump cavity to introduce fluid into the pump cavity and to extract fluid from the pump cavity.3. A pump system according to wherein the pump cavity and channels extend through the cavity block with constant cross section.4. A pump system according claim 1 , further comprising a pad having the same cross section as the cavity block claim 1 , the pad being mounted adjacent the cavity block within the cavity hole.5. A pump system according comprising:a drive unit enclosing the motor;a pump unit including the pump body, the cavity block in the pump body, the inlet, the outlet and the gears;wherein the pump unit is a removable pump unit which may be separated from the drive unit.6. A pump system according to claim 1 , wherein the pump unit further comprises a driven disk claim 1 , the driven disk being ...

SCREW COMPRESSOR WITH ADJUSTABLE INTERNAL VOLUME RATIO

A screw compressor is provided having adjustable internal volume ratio, including a body and a male rotor, a female rotor and a slide valve configured inside the body, a groove being configured at one side of the male rotor and the female rotor, and the slide valve being configured inside the groove with the slide valve movable inside the groove from a first position corresponding to a minimum internal volume ratio to a second position corresponding to a maximum internal volume ratio. 1. A screw compressor having adjustable internal volume ratio , comprises a body and a male rotor , a female rotor and a slide valve inside said body , a groove being configured at one side of said male rotor and said female rotor , said slide valve being configured inside said groove , wherein said slide valve is able to move inside said groove from a first position corresponding to a minimum internal volume ratio to a second position corresponding to a maximum internal volume ratio.2. A screw compressor with adjustable internal volume ratio according to claim 1 , wherein said slide valve is able to move to a third position corresponding to a middle internal volume ratio between said first position and said second position.3. A screw compressor with adjustable internal volume ratio according to claim 2 , wherein said female rotor and said male rotor have a suction end and an exhaust end claim 2 , said slide valve has a first end and a second end claim 2 , with said first end next to said suction ends and said second end next to said exhaust ends claim 2 , and a radial exhaust port being configured at said second end of said slide valve.4. A screw compressor with adjustable internal volume ratio according to claim 3 , wherein said first position is a position where said first end extends outside said suction ends claim 3 , while said second end does not extend outside said exhaust ends claim 3 , said second position is a position where said first end is level with said suction ends ...

WATER LUBRICATION TWIN-SCREW TYPE AIR COMPRESSOR

A water lubrication screw type air compressor includes a compressor, an air-loop system and a water-loop system. The water-loop system comprises a water supply device, a first water-loop unit and a second water-loop unit. The water supply device comprises a first water-treatment device to modify the water quality and provide purified water. The first water-loop unit comprises a second water-treatment device to modify water quality and reduce the corrosion of metal components. The second water-loop unit comprises a water filter to remove the impurities in water and maintain the purity of cycling water. Therefore, the water-loop system in the present invention comprises multiple water-treatment devices and filters to maintain the water quality. The purified water ensures better cooling, lubrication and airproofing when injected into the compressor. 1. A water lubrication screw type air compressor comprising:a compressor, especially a water lubrication twin-screw type air compressor, the compressor having a compression chamber and an axial sealing inside, the compressor further comprising an inlet end, an outlet end, a first water-injection port and a second water-injection port, the first water-injection port connected to the axial sealing and the second water-injection port connected to the compression chamber;an air-loop system connected to the inlet end and the outlet end of the compressor, and the air-loop system comprising a moisture separator that connects to the outlet end of the compressor; anda water-loop system comprising a water supply device, a first water-loop unit and a second water-loop unit, the water supply device connecting the inlet end of the compressor and an external water source, and the water supply device comprising a first water-treatment device, the first water-loop unit connecting the moisture separator and the first water-injection port of the compressor, the first water-loop unit comprising a second water-treatment device, the second ...

Single screw compressor

A single screw compressor comprises a main rotor and at least one gate rotor, a casing for the main rotor having a discharge port at a discharge end of the casing, and a slide slidable within a bore in the casing adjacent the main rotor. The slide has a cut-out (6) between first (2) and second (4) sealing parts of the slide, the slide is slidable between a high volume ratio position where the cut-out (6) is within the casing and provides a path to the discharge port, and a low volume ratio position where the slide is beyond the discharge end of the casing to provide a fixed discharge path in the bore of the casing.

Refrigerant Compressor

A refrigerant compressor particularly a rotary screw compressor comprising a compressor housing, a compressor element which is driven by a drive and is arranged in said compressor housing, at least one bearing unit for at least one element of the drive which comprises at least one bearing housing and at least one roller bearing that is arranged in the bearing housing. Lubricant is supplied by a lubricant distribution system to the bearing housing and a lubricant dispensing unit which comprises a filter holding chamber and a filter body that is arranged in the filter holding chamber is associated with the bearing housing. 1. Refrigerant compressor , particularly a rotary screw compressor , comprising a compressor housing , a compressor element which is arranged in the compressor housing and is driven by a drive , at least one bearing unit for at least one element of the drive which comprises at least one bearing housing and at least one roller bearing that is arranged in the bearing housing , a lubricant being supplied to the bearing housing by a lubricant distribution system , a lubricant dispensing unit comprising a filter holding chamber is associated with the bearing housing , and a filter body is arranged in the filter holding chamber.2. A refrigerant compressor in accordance with claim 1 , wherein the lubricant dispensing unit comprises an inlet channel which extends from the filter holding chamber to a lubricant chamber adjoining the roller bearing.3. A refrigerant compressor in accordance with claim 1 , wherein the lubricant dispensing unit comprises a throttle boring which is arranged between the filter holding chamber and a lubricant chamber adjoining the roller bearing.4. A refrigerant compressor in accordance with claim 1 , wherein the lubricant dispensing unit is integrated into the bearing housing.5. A refrigerant compressor in accordance with claim 4 , wherein the bearing housing comprises a housing element in which the lubricant dispensing unit is ...

AIREND HAVING A LUBRICANT FLOW VALVE AND CONTROLLER

A compressor system can include a lubricant injection system useful to supply lubricant to an airend. The compressor system can include a variable lubricant flow valve which can be regulated by a controller on the basis of operating conditions of the compressor system. In one form the compressor system also includes an oil separator and/or an oil cooler with or without a thermal control valve. The controller can have one or more modes of operation, including a mode in which the controller regulates the flow of lubricant to the airend to increase an internal flow area of the valve when the airend is operated at an unloaded or loaded condition. In some forms the controller can regulate the lubricant flow valve and/or the thermal control valve and/or the lubricant cooler. 1. An apparatus comprising:an airend having a male screw rotor configured to be complementarily rotated with a female screw rotor;a plurality of rolling element bearings structured to rotatingly support the male screw rotor and the female screw rotor when they are rotated to provide a flow of compressed fluid;a lubricant circuit having a conduit configured for the passage of a lubricant, the conduit configured to deliver lubricant to the plurality of rolling element bearings;a control valve in fluid communication with the conduit and structured to regulate a flow of lubricant through the conduit to the plurality of rolling element bearings, the control valve having a first position structured to deliver a first flow of lubricant to the plurality of rolling element bearings and a second position structured to deliver a second flow of lubricant to the plurality of rolling element bearings, the first flow greater than the second flow; anda controller configured to regulate the flow of lubricant through the control valve by activating the control valve to transition from the first position to the second position as a function of the operational state of the airend.2. The apparatus of claim 1 , wherein the ...

SCREW COMPRESSOR ELEMENT AND MACHINE

Screw compressor element provided with a housing wherein a rotor is rotatably arranged by way of two bearings, respectively being a cylinder bearing () and a ball bearing (), each provided with an inner ring () and an outer ring (), separated by respectively cylindrical, or ball-shaped rolling elements () that contact the inner ring () and the outer ring () at the location of a raceway (), characterised in that, next to the respective raceway (), the inner rings () of the aforementioned bearings () have a smaller outer diameter (B) than the respective raceway () on the side facing the other bearing () and in that next; to the respective raceway (), the inner rings () of the bearings have a greater outer diameter (C, D) than the respective raceway () on the side facing away from the other bearing (). 136-. (canceled)373456789105678101111121211125634111234111256111134111278320411123434ababaaaaaaabbbbb. A screw compressor clement provided with a housing wherein a rotor is rotatably arranged by way of two bearings , respectively being a cylinder bearing () and a ball bearing () , each provided with an inner ring ( ,) and an outer ring ( , ) , separated by respectively cylindrical , or ball-shaped rolling elements ( , ) that contact the inner ring ( , ) and the outer ring ( , ) at the location of a raceway ( , , , ) , characterized in that next to the respective raceway ( , ) , the inner rings ( , ) of the aforementioned bearings ( , ) have a smaller outer diameter (B) than the respective raceway ( , ) on the side facing the other bearing ( , ) and in that next to the respective raceway ( , ) , the inner rings ( , ) of the bearings have a greater outer diameter (C , D) than the respective raceway ( , ) on the side facing away from the other bearing ( , ) , and wherein next to the respective raceway ( , ) , the outer rings ( , ) of the bearings ( , ) have a smaller inner diameter (D , G) than the respective raceway ( , ) both on the side facing the other bearing ( , ) and ...

PULSATION DAMPER FOR COMPRESSORS

Devices, systems, and methods for pulsation dampers for compressors include outer and inner chambers forming parallel flow paths. 1. A damper for reducing pulsation from a compressor , the damper comprising:an outer chamber defining an outer cavity therein, the outer chamber being arranged to pass flow from an inlet to an outlet thereof,an inner chamber arranged within the outer cavity and defining an inner cavity therein, the inner chamber being arranged to pass flow from an inlet to an outlet thereof, anda number of partitions dividing the outer chamber into sections, the number of partitions each extending between the outer chamber and the inner chamber.2. The damper of claim 1 , wherein the sections of the outer chamber are each connected with each other near the inlet of the inner chamber to form an inlet manifold and are connected with each other near the outlet of the inner chamber to form an outlet manifold.3. The damper of claim 2 , wherein the sections of the outer chamber each extend between the respective inlet and outlet manifolds and define parallel flow paths.4. The damper of claim 2 , wherein the inlet of the inner chamber is connected with the inlet manifold and the outlet of the inner chamber is connected with the outlet manifold.5. The damper of claim 1 , wherein a housing forms at least a portion of the outer chamber claim 1 , the housing including a body and a cap fastened to the body to define at least a portion of the outer cavity.6. The damper of claim 5 , wherein the body forms a base portion of the outer chamber and forms the inner chamber.7. The damper of claim 6 , wherein the cap forms a head portion of the outer chamber.8. The damper of claim 5 , wherein the body forms a base portion of each of the number of partitions.9. The damper of claim 8 , wherein the cap forms a head portion of each of the number of partitions.10. The damper of claim 9 , wherein each base portion includes a fastener hole defined therethrough for receiving a ...

ROTOR FOR A COMPRESSOR

A system includes a compressor configured to compress a vapor, or a vapor and liquid mixture, and a first rotor of the compressor disposed on a first shaft, where the first rotor includes a first plurality of pockets in a first body portion to form a first semi-hollow internal volume or a plurality of flanks and/or a first plurality of flutes on a first external surface of the first rotor, where the plurality of flanks or the first plurality of flutes comprises a first pitch to form first variable leads. 1. A system , comprising:a compressor configured to compress a vapor, or a vapor and liquid mixture; anda first rotor of the compressor disposed on a first shaft, wherein the first rotor comprises a first plurality of pockets in a first body portion to form a first semi-hollow internal volume of the first rotor.2. The HVAC&R system of claim 1 , wherein the first plurality of pockets forms a honeycomb claim 1 , webbed claim 1 , or gyroid structure claim 1 , and wherein the first plurality of pockets comprises gaps claim 1 , voids claim 1 , or spaces that do not includes solid material.3. The system of claim 1 , comprising a second rotor of the compressor disposed on a second shaft claim 1 , wherein the second rotor comprises a second plurality of pockets in a second body portion to form a second semi-hollow internal volume of the second rotor claim 1 , wherein the first rotor and the second rotor are configured to mesh with one another to compress the vapor claim 1 , or the vapor and liquid mixture claim 1 , in the compressor as the first shaft rotates in a first circumferential direction and the second shaft rotates in a second circumferential direction claim 1 , opposite the first circumferential direction4. The system of claim 3 , wherein the first plurality of pockets claim 3 , or the second plurality of pockets claim 3 , or both claim 3 , forms a honeycomb claim 3 , webbed claim 3 , or gyroid structure claim 3 , wherein the first and second plurality of pockets ...

SUCTION SIDE SLIDE VALVE FOR A SCREW COMPRESSOR

The present disclosure is directed to a screw compressor system having a rotor housing with a pair of screw rotors rotatably supported within a compression chamber. A suction side slide valve is in fluid communication with an inlet to the compression chamber. The suction side slide valve is movable between a closed position and a fully open position to define a variable suction side inlet volume for controlling capacity of the compressor. 1. A compressor system comprising:a rotor housing;a compression chamber positioned within the housing, the compression chamber having a suction side and a discharge side;male and female screw rotors rotatably meshed together within the compression chamber, the screw rotors operable for compressing a working fluid;an inlet opening connected to the housing upstream of the compression chamber;a discharge port connected to the housing downstream of the compression chamber;an inlet port defined between the housing and the screw rotors on the suction side of the housing prior to fluid compression; anda suction side slide valve operably connected to the housing, the slide valve movable between first and second positions defined as fully closed and fully open to vary the size of the inlet port.2. The compressor system of claim 1 , wherein the slide valve is movable to an intermediate position at any location between the first and second positions.3. The compressor system of claim 2 , wherein the compressor operates at a full load claim 2 , a part load and unloaded when the slide valve is in the first position claim 2 , an intermediate position and the second position claim 2 , respectively.4. The compressor system of claim 1 , wherein the slide valve is defined by a top wall extending between first and second side walls and male and female rotor interface walls opposite of the top wall.5. The compressor system of further comprising:a guide channel formed in the top wall of the slide valve;a first slide groove formed in the first side of ...

ROTARY SCREW COMPRESSOR WITH ATOMIZED OIL INJECTION

The present disclosure is directed to a screw compressor system having a compressor housing with a pair of screw rotors rotatably supported within a compression chamber. A lubricant port is in fluid communication with the compression chamber. A nozzle insert having a longitudinal body extending between a first end and a second end can be positioned within the lubricant port. A swirl chamber formed by the nozzle insert or tangential flow into an offset lubricant port is configured to generate an atomized lubricant flow and discharge the atomized lubricant into the compression chamber. 1. A compressor comprising:a compressor housing;a compression chamber positioned within the compressor housing;male and female screw rotors rotatably meshed together within the compression chamber, the screw rotors operable for compressing a working fluid;a lubricant port in fluid communication with the compression chamber;a nozzle insert having a longitudinal body extending between a first end and a second end being positioned within the lubricant port; anda swirl chamber formed by the nozzle insert within the lubricant port, the nozzle insert configured to generate an angular flow velocity within the swirl chamber and discharge atomized lubricant into the compressor chamber.2. The compressor system of further comprising a discharge orifice formed with the lubricant port downstream of the nozzle insert claim 1 , the discharge orifice having a cross-sectional flow area that is smaller than a flow area of the lubricant port.3. The compressor system of claim 2 , wherein the discharge orifice discharges atomized lubricant into the compression chamber.4. The compressor system of claim 3 , wherein the discharged atomized lubricant impinges in a dispersed pattern onto one or both of the male and female screw rotors.5. The compressor system of claim 1 , wherein the nozzle insert includes a blade extending outward from an outer wall of the longitudinal body.6. The compressor system of claim 1 , ...

SCREW COMPRESSOR WITH OIL INJECTION AT MULTIPLE VOLUME RATIOS

The present disclosure is directed to a screw compressor system having a compressor housing with a pair of screw rotors rotatably supported within a compression chamber. Lubricant is injected into a compression chamber at a first volume ratio and at a second volume ratio greater than the first volume ratio to increase the sealing and lubrication between the screw rotors and rotor bores in the compressor housing as well as to increase heat transfer from a compressed working fluid in the compression chamber. 1. A compressor comprising:a compressor housing;a compression chamber extending between first and second ends of the housing;an inlet port upstream of the compression chamber;a discharge port downstream of the compression chamber;male and female screw rotors rotatably meshed together within the compression chamber, the screw rotors operable for compressing a working fluid;a compression pocket defined by a region in the compression chamber that is sealed from the inlet port and the discharge port;a volume ratio defined within the compression pocket, the volume ratio varying between 1.0 at an entrance region proximate the first end of the compression chamber and a design maximum volume ratio at an exit region proximate the second end of the compression chamber;a first lubricant injector configured to inject lubricant into the compression chamber at a first volume ratio; anda second lubricant injector configured to inject lubricant into the compression chamber at a second volume ratio, wherein the second volume ratio is larger than the first volume ratio.2. The compressor system of further comprising a third lubricant injector configured to inject lubricant into the compression chamber at a third volume ratio different from the first and second volume ratios.3. The compressor system of further comprising first and second injection ports extending through the housing at each of the first and second volume ratios.4. The compressor system of claim 3 , wherein the first ...

Liquid Feeding Type Screw Compressor

There is provided a liquid feeding type screw compressor that can reduce size and weight and improve vibration insulation and sound insulation. A liquid feeding type screw compressor includes as components: a compressor main body; a motor driving the compressor main body; and a gas-liquid separator separating a liquid from a compressed air discharged from the compressor main body. The motor is arranged above the compressor main body. The gas-liquid separator is arranged below the compressor main body. A compressor main body casing constituting an inner cylindrical space forming a compression operation chamber together with the screw rotor and constituting the contour of the compressor main body and a casing constituting the contour of another component consist of an integrally molded single member. 1. A liquid feeding type screw compressor comprising as components:a compressor main body equipped with a screw rotor;a motor driving the compressor main body; anda gas-liquid separator separating a liquid from a compressed air discharged from the compressor main body, whereinthe motor is arranged above the compressor main body,the gas-liquid separator is arranged below the compressor main body, anda compressor main body casing constituting an inner cylindrical space forming a compression operation chamber together with the screw rotor and constituting a contour of the compressor main body and a casing constituting a contour of another component consist of an integrally molded single member.2. The liquid feeding type screw compressor according to claim 1 , wherein the compressor main body casing and a casing constituting a contour of the gas-liquid separator consist of an integrally-molded single member.3. The liquid feeding type screw compressor according to claim 1 , wherein the compressor main body casing and a motor casing constituting a contour of the motor consist of an integrally-molded single member.4. The liquid feeding type screw compressor according to claim 2 ...

AIR REGULATOR, IN PARTICULAR FOR SCREW COMPRESSORS

An air regulator for compressor, in particular for a screw compressor, of the type that has an oil separator device comprising a pre-separator, is provided in a regulator housing containing a valve element which is spring-loaded on one side and can be actuated by means of a piston arrangement. A control device is operatively connected to the air regulator and includes a control piston which, depending on the pre-separator pressure, actuates the valve element of the air regulator in co-operation with a pre-control device in such a way that the regulator immediately and forcibly assumes the closed position upon starting the compressor, while the regulator assumes the open position in an unloaded initial state. 19-. (canceled)10. An air regulator for compressors , comprising:an oil separator apparatus with a pre-separator,a regulator housing,a valve element in said regulator housing, the valve element being spring-loaded on one side,a piston arrangement for actuating the valve element,pilot control apparatus, anda control apparatus containing a control piston,wherein the control piston, depending on a pre-separator pressure, in interaction with the pilot control apparatus actuates the valve element such that, when a compressor to which the regulator is connected is started, the regulator is immediately forced to assume a closed position, while in a base state the regulator assumes an open position.11. The air regulator as claimed in claim 10 , wherein the air regulator is adapted for being triggered in at least one of a pneumatic and electrical manner.12. The air regulator as claimed in claim 10 , wherein the air regulator is adapted for being triggered pneumatically claim 10 , and the control apparatus contains a check valve between control medium and pre-separator medium areas.13. The air regulator as claimed in claim 10 , wherein the pilot control apparatus comprises a valve magnet.14. The air regulator as claimed in claim 10 , wherein the control apparatus is ...

POSITIVE DISPLACEMENT PUMP ASSEMBLY WITH MOVABLE END PLATE FOR ROTOR FACE CLEARANCE CONTROL

A positive displacement pump assembly includes a rotor housing defining a rotor cavity, and an end plate configured to at least partially close one end of the rotor cavity. Rotors are supported on and fixed to rotor shafts and extend through the rotor cavity. A first pair of bearings fixing the rotor shafts to the end plate. A second pair of bearings fixes the rotor shafts to the rotor housing, preventing relative axial movement between the rotor shafts and the rotor housing. The end plate is axially movable with the rotor shafts when the rotor shafts vary in axial length due to thermal fluctuations so that changes in an axial clearance at end faces of the rotors are reduced. 120-. (canceled)21. A positive displacement pump assembly comprising:a rotor housing defining a rotor cavity;an end plate configured to at least partially close one end of the rotor cavity;rotor shafts extending through the rotor cavity;rotors supported on and fixed to the rotor shafts, the rotors having axial ends with end faces that face the end plate;a first pair of bearings rotatably mounting the rotor shafts to the end plate; anda second pair of bearings rotatably mounting the rotor shafts to the rotor housing;wherein the end plate is axially movable with the rotor shafts relative to the rotor housing when the rotor shafts vary in axial length due to thermal fluctuations to thereby reduce changes in an axial clearance at the end faces; and the end plate at least partially defines at least one inlet into the rotor cavity.22. The positive displacement pump assembly of claim 21 , wherein the rotor housing has a midportion that defines the rotor cavity and further includes an end portion fixed to the midportion and wherein a second axial clearance between the end plate and the end portion varies as the rotor shafts and the end plate move axially.23. The positive displacement pump assembly of claim 22 , wherein the rotor shafts extend through the end plate into the end portion; and further ...

AIR COMPRESSOR SYSTEM INCLUDING A REFRIGERATED DRYER AND A CONDENSATE HARVESTER AND WATER SUPPLY

An air compressor system useful for supplying a stream of compressed air for an end user is disclosed which includes a refrigerated dryer useful to remove moisture and harvest it from the compressed air. The refrigerated dryer includes an evaporator and a condenser, where the evaporator is useful to produce the moisture from the compressed air. The air compressor system includes an expansion tank which collects the harvested moisture from the evaporator and a supply line from a utility water supply, both of which can be used to provide liquid to a condenser of the dryer. A valve is used to bring together either or both of the condensate from the expansion tank and water from the utility water supply. The valve includes an outlet that provides liquid to a condenser of the dryer. 1. An apparatus comprising:An gas compressor system having a compressor structured to rotate a mechanical compression member and produce a stream of compressed wet gas, the gas compressor system having a refrigerated dryer configured to dry the wet compressed gas by removing condensable vapor, the refrigerated dryer including a dryer compressor to compress a refrigeration fluid, a condenser to receive compressed refrigerated fluid, and an evaporator to exchange heat between the wet compressed gas and the refrigeration fluid, the gas compressor system including an expansion tank to receive an inflow of a condensate produced from the condensable vapor as a result of operation of the evaporator, the expansion tank having an outlet in fluid communication with a valving member having a first inflow passage to receive condensate from the expansion tank and water from a utility water supply, wherein the valving member is configured to flow one or both of the condensate and water to a condenser pump which provides one or both of the condensate and water to the condenser.2. The apparatus of claim 1 , wherein a check valve is disposed intermediate with and in fluid communication with both the expansion ...

Dual-Stage Compressor, Control Method Thereof and Air Conditioning Unit

The present disclosure relates to a dual-stage compressor, a control method thereof, and an air conditioning unit. The dual-stage compressor includes a low-pressure stage; a high-pressure stage connected in series with the low-pressure stage; and a volume ratio adjustment mechanism arranged at the high-pressure stage and configured to adjust the volume ratio of refrigerant compression at the high-pressure stage. When the final compression pressure of the compressor is lower or greater than the exhaust pressure, the volume ratio adjustment mechanism is operated to increase or reduce the volume ratio of refrigerant compression at the high-pressure stage so that the final compression pressure of the compressor is equal to the exhaust pressure, and overcompression and undercompression are improved to adapt to changes in external conditions, increase the energy efficiency of the compressor, and reduce the noise of the compressor. 1. A dual-stage compressor , comprising:a low-pressure stage;a high-pressure stage connected in series with the low-pressure stage; anda volume ratio adjustment mechanism arranged at the high-pressure stage and configured to adjust the volume ratio of refrigerant compression at the high-pressure stage.2. The dual-stage compressor according to claim 1 , wherein the compressor is a screw compressor claim 1 , and the volume ratio adjustment mechanism comprises a first slide valve adjustment mechanism configured to adjust an output position of an exhaust port at the high-pressure stage.3. The dual-stage compressor according to claim 1 , further comprising a capacity adjustment mechanism arranged at the low-pressure stage and configured to adjust an output capacity of refrigerant compression at the low-pressure stage.4. The dual-stage compressor according to claim 3 , wherein the capacity adjustment mechanism comprises a second slide valve adjustment mechanism configured to adjust the output capacity of a bypass port at the low-pressure stage.5. The ...

OIL SEAL APPARATUS AND BLOWER COMPRISING THE SAME

An oil seal apparatus and a blower including the same are disclosed. The oil seal apparatus and the blower can assemble a body pipe quickly regardless of assembling direction of the body pipe when assembling the body pipe by forming a plurality of oil return holes, i.e., forming more than four or five oil return holes at upper portion, lower portion, left portion, and right portion of an outboard surface of the body pipe. The oil seal apparatus may be mounted in a shaft through-hole formed at an oil box of a blower. The oil seal apparatus may include: a body pipe mounted on a rotation shaft penetrating through the shaft through-hole and provided with a step portion formed at an exterior circumference of the body pipe; at least one collecting groove for collecting oil which is formed at an interior circumference of the body pipe; and more than four oil return holes evenly spaced from each other, formed at the body pipe slantedly from an inboard side to an outboard side, and communicating with the collecting groove. 1. An oil seal apparatus which is mounted in a shaft through-hole formed at an oil box of a blower , the oil seal apparatus comprising:a body pipe mounted on a rotation shaft penetrating through the shaft through-hole and provided with a step portion formed at an exterior circumference of the body pipe;at least one collecting groove for collecting oil which is formed at an interior circumference of the body pipe; andmore than four oil return holes evenly spaced from each other, formed at the body pipe slantedly from an inboard side to an outboard side, and communicating with the collecting groove.2. The oil seal apparatus of claim 1 , further comprising a bearing spacer mounted between the body pipe and the rotation shaft claim 1 , and wherein a spiral groove is formed on an interior circumference of the bearing spacer contacting with the body pipe and causes the oil to flow therethrough.3. The oil seal apparatus of claim 1 , wherein a staying groove of ...

CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR

A control valve includes: a first valve to control a flow rate of refrigerant flowing from a discharge chamber to a control chamber of a compressor; a second valve to control a flow rate of the refrigerant flowing from the control chamber to a suction chamber; a solenoid to generate a drive force in a first valve closing direction and a second valve opening direction; a biasing member to generate a biasing force in an first valve opening direction and a second valve closing direction; and a pressure sensing part to sense a pressure in the suction chamber or the control chamber, and generate a counterforce against the drive force. A state in which both of the first and second valves are open is present during an increase in the current supplied to the solenoid from zero to an upper limit current value, and an increase rate of an opening degree of the first valve is increased during a decrease in the current supplied to the solenoid, a predetermined lower limit current value being an inflection point of the increase. 1. A control valve applicable to a variable displacement compressor having a suction chamber , a discharge chamber , and a control chamber and having a discharge capacity varied by regulating a pressure in the control chamber , the control valve comprising:a first valve provided between the discharge chamber and the control chamber, to control a flow rate of refrigerant flowing from the discharge chamber to the control chamber;a second valve and a third valve provided parallel to each other between the control chamber and the suction chamber, to control a flow rate of the refrigerant flowing from the control chamber to the suction chamber;a solenoid to generate a drive force in a closing direction of the first valve and an opening direction of the second valve depending on an amount of supplied current; anda pressure sensing part to sense a pressure in the suction chamber or the pressure in the control chamber, and generate a counterforce against the ...

Screw compressor with external motor rotor

A screw compressor includes a housing, a first rotor rotatable about a first axis relative to the housing, and a second rotor rotatable about a second axis relative to the housing. The second rotor is enmeshed with the first rotor. A motor is embedded within the first rotor such that the motor is coaxial with the first axis.

WATER LUBRICATION TWIN-SCREW AIR COMPRESSING SYSTEM

A water lubrication screw type air compressor includes a compressor, an air-loop system and a water-loop system. The water-loop system includes a water supply device, a first water-loop unit and a second water-loop unit. The water supply device includes a first water-treatment device to modify the water quality and provide purified water. The first water-loop unit includes a second water-treatment device to modify water quality and reduce the corrosion of metal components. The second water-loop unit includes a water filter to remove the impurities in water and maintain the purity of cycling water. Therefore, the water-loop system in the present disclosure includes multiple water-treatment devices and filters to maintain the water quality. The purified water ensures better cooling, lubrication and air proofing when injected into the compressor. 1. A water lubrication twin-screw air compressing system comprising:a compressor, being a water lubrication air compressor having a pair of screw rotors disposed therein, the pair of screw rotors being complementary male rotor and female rotor to compress air, wherein the compressor includes a compressor housing formed with a compression chamber therein, an axial sealing device disposed in the compression chamber, a first water-injection port, and a second water-injection port; wherein the first water-injection port connects to the axial sealing device, and the second water-injection port connects to the compression chamber; an air filter;', 'an air valve fluidically connected to the air filter;', 'a first check valve fluidically connected to the air valve and the compressor, so as to prevent air from flowing backward from the compressor to the air valve;', 'a moisture separator for separating air from moisture, fluidically connected to the air valve and the compressor to receive an air-water mixture from the compressor; and', 'a first control valve fluidically connected between the air valve and the moisture separator, ...

VARIABLE VOLUME RATIO SCREW COMPRESSOR

A screw compressor, method of operating, and refrigerant circuit are disclosed. The screw compressor includes a suction inlet that receives a working fluid to be compressed. A compression mechanism is fluidly connected to the suction inlet that compresses the working fluid. A discharge outlet is fluidly connected to the compression mechanism that outputs the working fluid following compression by the compression mechanism. A valve assembly is configured to vary a location at which the compression mechanism compresses the working fluid, the valve assembly being disposed to modify a suction location of the screw compressor. 1. A screw compressor , comprising:a suction inlet that receives a working fluid to be compressed;a compression mechanism fluidly connected to the suction inlet that compresses the working fluid, the compression mechanism including one or more rotors;a rotor housing containing the one or more rotors;a discharge outlet fluidly connected to the compression mechanism that outputs the working fluid following compression by the compression mechanism; and a suction port of the compression mechanism is closer to a discharge end of the rotor housing in the first position than in the second position, and', 'a longitudinal length along which the compression mechanism compresses the working fluid is longer in the second position than in the first position., 'a rotor sealing member configured to move relative to the rotor housing between a first position and second position, wherein'}2. The screw compressor of claim 1 , wherein the suction port is an axial suction port claim 1 , and the location at which the compression mechanism receives the working fluid is variable for the axial suction port.3. The screw compressor of claim 1 , wherein the rotor sealing member is part of a slide piston assembly configured to move in a direction that is parallel to a longitudinal axis of the compression mechanism claim 1 , and the second position disposes the rotor sealing ...

SCREW COMPRESSOR

A screw compressor includes a casing having an outer peripheral wall, and a compression mechanism. The compression mechanism includes a screw rotor with helical grooves, a gate rotor with a plurality of gates meshing with the helical grooves, and a cylinder housing the screw rotor. The compression mechanism is disposed inward of the outer peripheral wall. The outer peripheral wall has a discharge passage through which a fluid compressed in the compression mechanism flows. The discharge passage includes an inner peripheral passage formed along an outer peripheral surface of the cylinder, and an outer peripheral passage formed along the inner peripheral passage and the outer peripheral wall. The inner and outer peripheral passages are formed so that the fluid compressed in the compression mechanism sequentially flows through the inner and outer peripheral passages. 1. A screw compressor , comprising:a casing having an outer peripheral wall; and a screw rotor provided with helical grooves,', 'a gate rotor including a plurality of gates meshing with the helical grooves, and', 'a cylinder housing the screw rotor,, 'a compression mechanism including'}the compression mechanism being disposed inward of the outer peripheral wall,the outer peripheral wall having a discharge passage formed therein through which a fluid compressed in the compression mechanism flows, and an inner peripheral passage formed along an outer peripheral surface of the cylinder to extend in an axial direction of the cylinder, and', 'an outer peripheral passage formed along the inner peripheral passage and the outer peripheral wall to extend in the axial direction of the cylinder,', 'the inner peripheral passage and the outer peripheral passage being formed so that the fluid compressed in the compression mechanism sequentially flows through the inner peripheral passage and the outer peripheral passage., 'the discharge passage including'}2. The screw compressor of claim 1 , whereinthe discharge passage ...

COMPRESSOR STOP VALVE AND ASSOCIATED SYSTEM

A compressor system is provided that includes a contact cooled compressor and a coolant separator. The coolant separator is used to remove coolant fluid from a compressed flow stream produced by the contact cooled compressor during its operation. The coolant separator routes the removed coolant fluid back to the contact cooled compressor for further use. In some forms the coolant fluid is cooled prior to delivery back to the compressor. A stop valve can be provided in the coolant fluid return line to halt the flow of the fluid. A pressure sensitive member can be disposed to sense pressure of the coolant fluid that has been routed past the stop valve. Operation of the compressor can be changed as a result of the sensed pressure from the pressure sensitive member. Information from a temperature sensitive member can also be used to change operation of the compressor. 121.-. (canceled)22. A compressor assembly comprising:a compressor configured to raise a pressure of a compressible fluid, the compressor configured to employ oil within the compressor to lubricate at least one compressor elements;an oil reservoir coupled with the compressor via a conduit, the conduit configured to convey oil under pressure to the compressor from the oil reservoir;a controller configured to control operation of the compressor; anda temperature sensor in thermal communication with oil conveyed by the conduit to determine a temperature of the oil, the temperature determined by the temperature sensor being biased to provide an estimated temperature,wherein the controller is configured to cause operation of the compressor to halt when the controller determines that the estimated temperature exceeds an operational threshold temperature.23. The compressor assembly as recited in claim 22 , further comprising a valve coupled with the conduit between the oil reservoir and the compressor claim 22 , the valve operable to stop the flow of oil from the oil reservoir to the compressor.24. The compressor ...

GAS COOLER

A gas cooler includes a pair of seal plates and a pair of first support ribs. The individual seal plate has a stepped surface which extends in a direction that a cooling portion is inserted into a casing. The individual first support rib supports the stepped surface. With the configuration where the stepped surface is supported by the first support rib, the inside of the casing is partitioned into an upstream-side space communicated with an introducing port and a downstream-side space communicated with a discharging port. 1. A gas cooler comprising:a casing having an opening;an introducing port through which a gas is introduced into the inside of the casing;a discharging port through which the gas is discharged from the inside of the casing;a cooling portion which is inserted into the casing through the opening, is housed in the casing, cools the gas, and maintains air-tightness against the opening;a pair of seal plates which is disposed in the cooling portion, and has portions to be supported which extend in a direction that the cooling portion is inserted; anda pair of support portions which is provided for supporting the portions to be supported, the support portions being disposed on an inner surface of the casing such that the pair of support portions projects into the inside of the casing and extends in the insertion direction,wherein the portions to be supported are placed on the support portions so as to partition the inside of the casing into an upstream-side space communicated with the introducing port and a downstream-side space communicated with the discharging port.2. The gas cooler according to claim 1 , wherein the casing has both side wall portions which opposedly face each other as viewed in the insertion direction claim 1 , andwherein the pair of support portions is disposed on inner surfaces of said both side wall portions.3. The gas cooler according to claim 1 , wherein the casing has a bottom wall portion claim 1 , andwherein the pair of support ...

TWO-STAGE SCREW COMPRESSOR AND AIR CONDITIONING SYSTEM

A two-stage screw compressor and an air conditioning system. The two-stage screw compressor includes: a housing with an intake port and an exhaust port provided thereon; a low-pressure stage screw set axially arranged in the housing and connected to the intake port; a high-pressure stage screw set axially arranged in the housing and connected to the exhaust port; a drive motor axially arranged in the housing; and a transmission gear set for simultaneously transmitting a torque provided by the drive motor to the low-pressure stage screw set and the high-pressure stage screw set; wherein, the drive motor, the low-pressure stage screw set and the high-pressure stage screw set are axially arranged on the same side of the transmission gear set. 1. A two-stage screw compressor , comprising:a housing with an intake port and an exhaust port provided thereon;a low-pressure stage screw set axially arranged in the housing and connected to the intake port;a high-pressure stage screw set axially arranged in the housing and connected to the exhaust port;a drive motor axially arranged in the housing; anda transmission gear set for simultaneously transmitting a torque provided by the drive motor to the low-pressure stage screw set and the high-pressure stage screw set;wherein, the drive motor, the low-pressure stage screw set and the high-pressure stage screw set are axially arranged on the same side of the transmission gear set.2. The two-stage screw compressor according to claim 1 , wherein the low-pressure stage screw set and the high-pressure stage screw set are arranged on the same side of a vertical plane where the axis of the drive motor is located.3. The two-stage screw compressor according to claim 2 , wherein the low-pressure stage screw set is arranged at a lower part of the high-pressure stage screw set.4. The two-stage screw compressor according to claim 1 , wherein the transmission gear set comprises:a driving gear connected to the drive motor;a low-pressure stage ...

MULTI-STAGE RESONATOR FOR COMPRESSOR

A compressor has an inlet port and a discharge port. The discharge port communicates into a resonator chamber. The resonator chamber includes a first stage resonator array and a second stage resonator array downstream of the first stage resonator array with a connecting passage intermediate the first and second resonator array. Each of the resonator arrays includes a pair of spaced resonator arrays sub-portions, with each of the sub-portions including a plurality of cells extending into a housing member, and have a bottom wall and an open outer wall communicating with the flow passage, with a plurality of orifices extending into each of the cells. The orifices have a smaller diameter than a hydraulic diameter of the cells. 1. A compressor comprising:a compressor having an inlet port and a discharge port, said discharge port communicating into a resonator chamber, said resonator chamber including a first stage resonator array and a second stage resonator array downstream of said first stage resonator array with a connecting passage intermediate said first and second resonator array and an exit port leaving the resonator chamber, a flow passage communicates the discharge port to the exit port, and passes through the first and second resonator arrays; andeach of said first and second resonator arrays including a pair of spaced resonator arrays sub-portions, with each of said sub-portions including a plurality of cells extending into a housing member, and having a bottom wall and an open outer wall communicating with the flow passage, with a plurality of orifices extending into each of said cells, with said orifices having a smaller diameter than a hydraulic diameter of said cells.2. The compressor as set forth in claim 1 , wherein said orifices are formed in a perforated plate that encloses said plurality of cells.3. The compressor as set forth in claim 2 , wherein said connecting passage has a non-circular flow area claim 2 , at least over a portion of its length ...

Infinitely variable vi in screw compressors using proportional valve control

A variable-efficiency screw compressor for use in a closed-loop system configured to perform refrigeration is provided. The variable-efficiency screw compressor includes an inlet port to draw refrigerant into the variable-efficiency screw compressor, one or more rotating screws in fluid communication with the inlet port to compress the refrigerant, forming a compressed refrigerant, a discharge port in fluid communication with the rotating screws to receive the compressed refrigerant and discharge the refrigerant, wherein the discharge port includes an adjustable piston movable within the discharge port from a first position in which volume is higher to a second position in which volume is lower, the adjustable piston arranged and disposed to adjust volume of the discharge port in response to a change in demand.

SECTIONAL SEALING SYSTEM FOR ROTARY SCREW COMPRESSOR

A sectional sealing system for water-spray type screw rotor compressor that is configured to prevent the intermixing of coolant and working fluid from a compression chamber with lubricant used to lubricate at least a bearing system of a rotor. The sealing system may include suction side and discharge side sealing portions that are positioned about first and second shafts, respectively, of the rotor. the suction side sealing portion may include a first seal, a first labyrinth seal, and a second labyrinth seal, the first seal being in proximity to a suction side of the compression chamber. The discharge side sealing portion may include a plurality of first seals, a second seal, a first labyrinth seal, and a second labyrinth seal, the plurality of first seals of the discharge side sealing portion being in proximity to a discharge side of the compression chamber. 1. A sectional sealing system positioned about a shaft of a screw compressor rotor and configured to prevent working fluid and coolant from leaking from a compression chamber and intermixing with lubricant from a bearing system , the sectional sealing system comprising:a first discharge side seal section having a plurality of seals configured to inhibit the flow of working fluid and coolant from a discharge side of the compression chamber;a second discharge side seal section having a plurality of seals configured to inhibit the flow of working fluid and coolant from a discharge side of the compression chamber;a second discharge side seal section positioned downstream from the first discharge side seal section, the second discharge side seal section including a seal configured to inhibit the flow of working fluid and coolant that flowed past the first discharge side seal section;a third discharge side seal section positioned downstream from the second discharge side seal section, the third discharge side seal section including a labyrinth seal configured to inhibit the flow of working fluid and coolant that ...

Fluid Machine

Provided is a fluid machine configured such that liquid supplied to a working chamber from the outside of the fluid machine is dispersed extensively in the working chamber. This fluid machine is constituted of a screw rotor and a casing for accommodating the screw rotor and is provided with a liquid supply section for supplying liquid into a working chamber from the outside. The liquid supply section is configured so that liquid is dispersed in the longitudinal direction of the tooth groove of the screw rotor rather than in the width direction thereof. 1. A fluid machine including a screw rotor and a casing for accommodating the screw rotor , and comprising a liquid supply section for supplying liquid into a working chamber from the outside ,wherein the liquid supply section is configured to disperse the liquid in a longitudinal direction rather than a width direction of a groove of the screw rotor.2. The fluid machine according to claim 1 , wherein the liquid supply section includes a plurality of liquid injection holes in which each axis is inclined with respect to each other in the same plane and intersects in the same groove.3. The fluid machine according to claim 2 , wherein the liquid supply section is disposed such that a straight line connecting center axes of the plurality of liquid injection holes in the longitudinal direction is at a predetermined angle with respect to a direction orthogonal to the longitudinal direction of the groove of the screw rotor.4. The fluid machine according to claim 3 , wherein the liquid supply section is disposed in a direction in which the straight line is orthogonal to the longitudinal direction of the groove communicating with the liquid injection holes of the screw rotor.5. The fluid machine according to claim 2 , wherein the liquid supply section is an impinging jet nozzle.6. The fluid machine according to claim 1 , wherein the liquid supply section has a slit section which connects a liquid supply hole and the working ...

SILENCER AND COMPRESSOR

Disclosed are a silencer and a compressor with same. The silencer includes a housing, a gas inlet end of the housing being provided with a protrusion extending into an interior of the housing, a portion of the protrusion approximate to a gas outlet end of the housing being closed, and the gas inlet end of the housing being provided with at least two gas inlets around the protrusion. A part of a gas flow enters the housing through the gas inlets, and other part of the gas flow impacts the protrusion and then at least partially flows back and enters the housing through the gas inlets. 1. A silencer , comprising a housing , wherein , a protrusion is arranged in a gas inlet end of the housing and extends into an interior of the housing; a portion of the protrusion , which is approximate to a gas outlet end of the housing , is closed;at least two gas inlets are arranged in the gas inlet end of the housing and disposed around the protrusion;enabling that a part of a gas flow flows through the gas inlets and enters the housing;another part of the gas flow impacts the closed portion of the protrusion, and at least partially flows back and enters the housing through the gas inlets.2. The silencer according to claim 1 , wherein the protrusion is a solid structure.3. The silencer according to claim 1 , wherein claim 1 ,the protrusion is a hollow structure; the protrusion comprises a top wall; the top wall is a closed portion;the gas flow impacts the top wall and flows back when it enters the protrusion.4. The silencer according to claim 3 , wherein the protrusion comprises a circumferential side wall claim 3 , and the circumferential side wall is provided with a through opening that is in communication with the interior of the housing.5. The silencer according to claim 4 , wherein a size of the through opening is smaller than a size of the gas inlet.6. The silencer according to claim 1 , wherein a filter screen is arranged inside the housing; in a direction of the gas flow in ...

COMPRESSOR SYSTEM WITH VARIABLE LUBRICANT INJECTION ORIFICE

A compressor system with a continuously variable oil injection orifice is structured to regulate a flow of oil from an oil reservoir into a compressor. The orifice includes a first valve member moveable in response to oil pressure toward a second valve member to define a continuously variable flow area. A biasing member urges the first valve member away from the second valve member. 1. A compressor system , comprising:a compressor;an oil reservoir; anda continuously variable oil injection orifice structured to regulate a flow of oil from the oil reservoir into the compressor, the continuously variable oil injection orifice comprising:a first valve member structured to displace in response to oil pressure;a second valve member structured to cooperate with the first valve member to define a continuously variable flow area for controlling a flow of oil through the continuously variable injection orifice;a biasing member structured to urge the first valve member away from the second valve member; andwherein oil pressure acting on the first valve member urges the valve member to move toward the second valve member.2. The compressor system of claim 1 , wherein a displacement of the first valve member toward the second valve member reduces the continuously variable flow area.3. The compressor system of claim 1 , wherein the biasing member is a dual acting spring system.4. The compressor system of claim 1 , wherein the second valve member includes a plate having an oil discharge opening for discharging the oil to the compressor.5. The compressor system of claim 4 , wherein the plate includes a mesh disposed in the oil discharge opening.6. The compressor system of claim 4 , wherein the plate includes:a hub having a pilot opening formed therethrough;an outer rim positioned about the hub; andat least one supporting arm extending between the hub and the rim.7. The compressor system of claim 6 , wherein the pilot opening is structured to slidably receive a rod.8. The compressor ...

SCREW COMPRESSOR

A screw compressor, in particular for refrigeration systems, comprising a compressor housing () which at least partly encloses the compressor, an integrated suction gas filter () and a non-return valve () that is to be actuated by pressurized gas; the compressor housing () has grooves, in particular drilled or cast ducts () to which pressurized gas can be fed in order to control the non-return valve (). 1. A screw compressor , in particular for refrigerating plants , which has a compressor housing which at least partially houses the compressor , comprising an optional integrated suction gas filter and an integrated non-return valve , whereinthe non-return valve is a valve to be actuated with pressurized gas and the compressor housing possesses cavities, in particular bored or cast-in ducts, which can be subjected to pressurized gas for controlling of the non-return valve.2. The screw compressor as claimed in claim 1 , whereinthe screw compressor further has a valve, which is preferably realized as a solenoid valve, for switching on and off the pressurized gas supply to the non-return valve, wherein the solenoid valve is disposed directly on the compressor housing and creates the connection of the ducts bored or cast in the compressor housing.3. The screw compressor as claimed in claim 1 , whereinthe non-return valve has a valve disk and the suction gas filter is disposed coaxially around the non-return valve in such a way that the valve disk of the non-return valve moves within the suction gas filter.4. The screw compressor as claimed in claim 1 , whereinthe compressor housing has a cover, and in that the cover of the compressor housing is simultaneously the cover of the non-return valve.5. The screw compressor as claimed in claim 1 , whereinthe screw compressor has a third gas space, which is provided to receive compressed gas, i.e. pressurized gas, and a first duct, in which the non-return valve is at least partially mounted, wherein the third gas space and the ...

SCREW COMPRESSOR

A screw compressor includes a first rotor and a second rotor, and each rotor is provided with a synchronisation gear. The screw compressor is further provided with an electric motor and one or two driving gears for driving the first rotor or second rotor. At least one of the synchronisation gears or driving gears is provided with spokes between a rim supporting a gear mesh and a corresponding gear hub. 115-. (canceled)16. A screw compressor comprising a first rotor and a second rotor , each rotor comprising a synchronisation gear , said screw compressor further provided with an electric motor and one or two driving gears for driving said first rotor or second rotor , wherein at least one of the synchronisation gears or driving gears is provided with spokes between a rim supporting a gear mesh and a corresponding gear hub.17. The screw compressor according to claim 16 , wherein the screw compressor comprises only one driving gear for driving said first rotor or second rotor.18. The screw compressor according to claim 16 , wherein the synchronisation gear or driving gear with the largest diameter is provided with spokes between the rim supporting a gear mesh and a corresponding gear hub.19. The screw compressor according to claim 16 , wherein at least one of the driving gears or synchronisation gears with spokes is a helical gear with the teeth at an angle with an axis of the gear.20. The screw compressor according to claim 16 , wherein one of said driving gears is mounted on the electric motor claim 16 , whereby this driving gear is provided with spokes between a rim supporting a gear mesh and a corresponding gear hub.21. The screw compressor according to claim 16 , wherein the spokes are beam-shaped and have a constant cross-section.22. The screw compressor according to claim 16 , wherein the surface of the space between the spokes is more than three times claim 16 , preferably more than four and claim 16 , even more preferably claim 16 , more than five times the ...

METHOD FOR SMOOTHING A PERFLUORO ALKOXY ALKANE FILM SURFACE

Method for increasing the smoothness of the free surface area of a PFA film, provided on a component by sequentially exposing it to a temperature higher than its melting temperature so as to melt at least the free surface area, lowering the temperature to solidify the melted portion, remelting the free surface area by exposing it to a temperature of at least the PFA melting temperature and again lowering the temperature. The PFA film may be provided on AlO, Ni or NiFfilm. 2. The method according to claim 1 , wherein the PFA film is provided on an AlOfilm formed by non-porous anodic oxidization.3. The method according to claim 1 ,wherein the PFA film is provided on a Ni film.47-. (canceled)8. The method according to claim 1 , wherein the PFA film is provided on a NiFfilm.9. The method according to claim 1 , wherein the component is a screw rotor for a gas exhaust screw pump.10. The method according to claim 2 , wherein the component is a screw rotor for a gas exhaust screw pump.11. The method according to claim 3 , wherein the component is a screw rotor for a gas exhaust screw pump.12. The method according to claim 8 , wherein the component is a screw rotor for a gas exhaust screw pump.13. The method according to claim 1 , wherein the PFA has a molecular weight of from hundreds of thousands to one million.14. The method according to claim 2 , wherein the PFA has a molecular weight of from hundreds of thousands to one million.15. The method according to claim 3 , wherein the PFA has a molecular weight of from hundreds of thousands to one million.16. The method according to claim 8 , wherein the PFA has a molecular weight of from hundreds of thousands to one million.17. The method according to claim 9 , wherein the PFA has a molecular weight of from hundreds of thousands to one million.18. The method according to claim 10 , wherein the PFA has a molecular weight of from hundreds of thousands to one million.19. The method according to claim 11 , wherein the PFA has a ...

Screw Compressor System for a Utility Vehicle

A screw compressor system for a utility vehicle has at least one screw compressor, at least one screw compressor drive with an output shaft, at least one driven screw with a screw drive shaft section. The output shaft and the screw drive shaft section are essentially coaxial. 1. A screw compressor system for a utility vehicle , comprising:at least one screw compressor;at least one screw compressor drive with an output shaft; andat least one driven screw with a screw drive shaft portion, whereinthe output shaft and the screw drive shaft portion are substantially coaxial.2. The screw compressor system as claimed in claim 1 , whereina compensating coupling is provided between the output shaft and the screw drive shaft portion.3. The screw compressor system as claimed in claim 1 , whereinthe screw drive shaft portion has a first bearing portion.4. The screw compressor system as claimed in claim 3 , whereina radial bearing is arranged on the first bearing portion.5. The screw compressor system as claimed in claim 4 , whereinthe radial bearing is in the form of a needle-roller bearing.6. The screw compressor system as claimed in claim 4 , whereinthe radial bearing has no inner ring.7. The screw compressor system as claimed in claim 4 , whereinrolling elements of the radial bearing run directly on a surface of the first bearing portion.8. The screw compressor system as claimed in claim 5 , whereinrolling elements of the radial bearing run directly on a surface of the first bearing portion.9. The screw compressor system as claimed in claim 6 , whereinrolling elements of the radial bearing run directly on a surface of the first bearing portion.10. The screw compressor system as claimed in claim 3 , whereinthe driven screw has a screw portion and a second bearing portion in addition to the screw drive shaft portion, andthe screw portion is situated between the screw drive shaft portion and the second bearing portion.11. The screw compressor system as claimed in claim 10 , ...

HIGH EFFICIENCY HEATING AND/OR COOLING SYSTEM AND METHODS

HVAC systems and methods for delivering highly efficient heating and cooling using ambient air as the working fluid. A plenum has an upstream inlet and a downstream outlet, each in fluid communication with a target space to be heated or cooled. Ambient air is drawn into the inlet at an incoming pressure and an incoming temperature. The inlet and outlet are gated, respectively, by first and second rotary pumps. A heat exchanger in the plenum transfers heat into or out of the air, provoking a change in air volume within the plenum. The systems and methods are configured to operate essentially between the working temperatures, Tand T. This technique, called Convergent Refrigeration or counter-conditioning, provides for the reduction of excess refrigerant lift by optimization of the heat transfer temperature. Two Convergent Refrigeration systems can be arranged back-to-back through a common heat exchanger for ultra-high efficiency operation. 1. A method for transferring heat between a heat exchanger and a gaseous medium in a thermodynamic system , said method comprising the steps of:providing a plenum for a gaseous heat transfer medium,inlet gating the plenum at an upstream location with an inlet gate, the gaseous medium having an incoming pressure and temperature entering the inlet gate,outlet gating the plenum at a downstream location with an outlet gate,operatively locating a heat exchanger within the plenum in-between the inlet gate and the outlet gate,transferring heat into or out of the gaseous medium with the heat exchanger, the heat exchanger having a Heat Exchanger Temperature, the gaseous medium in the plenum upstream of the heat exchanger having an Approaching Temperature,counter-conditioning the Approaching Temperature by reducing the Approaching Temperature below the Heat Exchanger Temperature when heat is transferred into the gaseous medium from the heat exchanger and elevating the Approaching Temperature above the Heat Exchanger Temperature when heat is ...

OIL SEPARATOR DEVICE FOR A VOLUMETRIC COMPRESSOR AND VOLUMETRIC COMPRESSOR

The present invention is a separator device (oil separation) () for a device () for compressing a gas through the use of a compression fluid, comprising a compression chamber () suited to generate a compressed mixture of the gas and the compression fluid, and a separation tank () for the removal of the lubricant fluid from the compressed mixture, a first tubular element () suited to be inserted between the compression chamber () and the oil separation tank () of the compression device (), in such a way as to convey the mixture inside the tank (). The device () comprises means for deviating and/or conveying the flow of the compressed mixture that are suited to convey the mixture against the inner walls of the first tubular element () before the compressed mixture flows out of the first tubular element (). The invention also concerns a separation tank () for a device () for compressing a gas through the use of a compression fluid. 11001127100101271710101101. Separator device (oil separation device) () for a device () for compressing a gas through the use of a compression fluid , said compression device () comprising a compression chamber () suited to generate a compressed mixture of said gas and said compression fluid , along with a separation tank () suited to remove said lubricant fluid from said compressed mixture , said device () comprising a first tubular element () suited to be inserted between said compression chamber () and said oil separation tank () of said compression device () so as to convey said mixture into said tank () , characterized in that said device () comprises deviating and/or conveying means suited to deviate the flow of said compressed mixture and to convey said mixture against the inner walls of said first tubular element () before said compressed mixture flows out of said first tubular element ().2101103102101102. Device according to claim 1 , characterized in that said first tubular element () comprises a first inlet end that defines a ...

Oil Supply Type Compressor

The objective of the present invention is to reduce the pressure reduction time while preventing foaming in an oil separation device during capacity control of a compressor, and to avoid startup congestion and thus enable normal starting even when a portion provided in an air release pipe and having a small flow path cross-sectional area becomes clogged. This oil supply type compressor is equipped with a compressor main body, an oil separation device, and an air discharge passage for discharging compressed air during capacity control of the compressor. Furthermore, the air discharge passage is equipped with a passage having a large flow volume and a passage having a small flow volume, and when compressed air is discharged from the air discharge passage to the atmosphere during capacity control, the pressure in the oil separation device is discharged using the passage having a large flow volume, until the pressure reaches or falls below a restarting-possible pressure, which is the pressure at which startup congestion does not occur when the compressor main body is restarted. When the pressure in the oil separation device reaches a prescribed pressure, which is less than or equal to the restarting-possible pressure and is higher than a foaming pressure, which is the pressure at which foaming occurs when the pressure in the oil separation device is discharged quickly, the pressure is discharged using the passage having a small flow volume. 1. An oil supply type compressor , comprising:a compressor body compressing air;an oil separation device separating lubricating oil from the compressed air compressed by the compressor body;piping for supplying, to a user side, the compressed air after flowing through the oil separation device; andan air release path for releasing the compressed air after flowing through the oil separation device in capacity control for the compressor,wherein:the air release path includes a high flow-rate flow path and a low flow-rate flow path;in ...

OIL-COOLED SCREW COMPRESSOR SYSTEM AND OIL-COOLED SCREW COMPRESSOR

In a housing of an oil-cooled screw compressor , a separation gas supply path through which separation gas is supplied to a separation gas supply gap defined between a first seal unit and a second seal unit of a seal device , and a pressure balancing path through which an area closer to a screw chamber than the first seal unit in a discharge side seal chamber communicates with a compression chamber at a pressure higher than an intake pressure and lower than a discharge pressure, are defined. A check valve that restricts a flow of a fluid in a direction from the screw chamber to the discharge side seal chamber is disposed in the pressure balancing path 111-. (canceled)12. An oil-cooled screw compressor system comprising:an oil-cooled screw compressor;a tooth surface lubricating fluid supply system that supplies a tooth surface lubricating fluid to the oil-cooled screw compressor;a bearing lubricating fluid supply system that supplies a bearing lubricating fluid to the oil-cooled screw compressor, in addition to the tooth surface lubricating fluid; anda separation gas supply system that supplies separation gas different from target gas compressed by the oil-cooled screw compressor to the oil-cooled screw compressor, whereinthe oil-cooled screw compressor includes:a housing in which a screw chamber, seal chambers positioned on both sides of the screw chamber, bearing chambers in communication with the screw chamber via the seal chambers, a tooth surface lubricating fluid flow path through which the tooth surface lubricating fluid is supplied to the screw chamber, and a bearing lubricating fluid flow path through which the bearing lubricating fluid is supplied to the bearing chambers, are defined; a plurality of bearings that are disposed in the bearing chambers, and rotatably support the respective shafts; and', 'seal devices that are disposed in the respective seal chambers, and each seal a circumference of a corresponding one of the shafts,, 'male and female screw ...

Air Compressor

Provided is an air compressor which helps to attain a proper discharge air temperature and which is superior in energy saving property. There are provided an air line connecting an air compressor, an oil separator, and an after cooler; an oil circulation line connecting the air compressor, the oil separator, and an oil cooler; a bearing oil supply line connecting one end of an intermediate branching portion disposed at an intermediate point of the oil circulation line between the oil cooler and the air compressor to a bearing oil supply portion of the air compressor; an intermediate portion oil supply line connecting the other end of the intermediate branching portion to an intermediate oil supply portion of the air compressor; a branching line supplying oil to the bearing oil supply portion and the intermediate oil supply portion; a blower sending air to the oil cooler and the after cooler; a bypass line connecting one end of a bypass branching portion disposed at an intermediate point of the oil circulation line between the oil separator and the oil cooler to the downstream side of the oil cooler of the bearing oil supply line; and a control valve controlling the inflow amount of the lubricating oil to the bypass line. 1. An air compressor unit comprising:an air compressor;an oil separator separating compressed air discharged from the air compressor and a lubricating oil from each other;an oil cooler cooling the lubricating oil discharged from the oil separator;an after cooler cooling discharged air from the air compressor;an air line effecting connection such that the discharged air successively flows through the air compressor, the oil separator, and the after cooler;an oil circulation line effecting connection such that the lubricating oil successively circulates through the air compressor, the oil separator, and the oil cooler;an intermediate branching portion disposed at an intermediate point of the oil circulation line between the oil cooler and the air ...

Screw Rotor and Screw-Type Fluid Machine Main Body

A screw rotor which is hollow has improved performance against heat, pressure, rust, and the like. A screw rotor includes a screw portion of which an outer periphery has teeth and grooves having a helical shape and extending by a predetermined length in an axial direction. A radial cross section of at least a part of the screw portion includes a cross section of an outer surface portion forming the teeth and the grooves, a cross section of an axial center portion, a cross section of a support portion that connects an axial center side of the outer surface portion and an outer diameter side of the axial center portion, and a cross section of a hollow portion formed by the support portions adjacent to each other in a rotational direction and an axial center side inner surface of a tooth bottom or a tooth tip. In at least the radial cross section of the screw portion, different members are continuously joined as an integral structure in a cross section of at least one of the axial center portion and the support portion and the outer surface portion. 1. A screw rotor comprising:a screw portion of which an outer periphery has teeth and grooves having a helical shape and extending by a predetermined length in an axial direction,wherein a radial cross section of at least a part of the screw portion includes a cross section of an outer surface portion forming the teeth and the grooves, a cross section of an axial center portion, a cross section of a support portion that connects an axial center side of the outer surface portion and an outer diameter side of the axial center portion, and a cross section of a hollow portion formed by the support portions adjacent to each other in a rotational direction and an axial center side inner surface of a tooth bottom or a tooth tip, andin at least the radial cross section of the screw portion, different members are continuously joined as an integral structure in a cross section of at least one of the axial center portion and the ...

CAPACITY CONTROL FOR CHILLERS HAVING SCREW COMPRESSORS

A compressor system includes a screw compressor () and a controller (). The screw compressor includes a slide valve () selectively actuatable between a first position and a second position to facilitate modulating a capacity of the screw compressor between fully-loaded and fully-unloaded. The controller is communicably coupled to the slide valve. The controller is configured to receive a chilled fluid temperature setpoint for a fluid in heat transfer communication with a refrigerant of the refrigeration circuit; receive temperature data indicative of a chilled fluid temperature of the fluid; determine a difference between the chilled fluid temperature and the chilled fluid temperature setpoint; and provide one of a load command and an unload command to the slide valve based the difference between the chilled fluid temperature and the chilled fluid temperature setpoint. According to an example embodiment, the controller () does not receive feedback from the screw compressor () regarding a position of the slide valve (). 1. A compressor system for a refrigeration circuit , comprising:a screw compressor including a slide valve selectively actuatable between a first position and a second position to facilitate modulating a capacity of the screw compressor between fully-loaded and fully-unloaded; and receive a chilled fluid temperature setpoint for a fluid in heat transfer communication with a refrigerant of the refrigeration circuit;', 'receive temperature data indicative of a billed fluid temperature of the fluid;', 'determine a difference between the chilled fluid temperature and the chilled fluid temperature setpoint; and', 'provide one of a load command and an unload command to the slide valve based the difference between the chilled fluid temperature and the chilled fluid temperature setpoint., 'a controller communicably coupled to the slide valve, the controller configured to2. The compressor system of claim 1 , wherein the controller is further configured to: ...

INTERNAL DISCHARGE GAS PASSAGE FOR COMPRESSOR

A compressor casing having an internal gas passage includes a first bearing housing arranged at a first end of the casing, a second bearing housing arranged at a second, opposite end of the casing, and a rotor case disposed between the first bearing housing and the second bearing housing. The rotor case includes an axially extending bore within which a plurality of rotors are receivable and a hollow internal cavity isolated from the bore. The internal cavity is fluidly coupled to the bore via at least one recess. At least one exit opening is formed in one of the first bearing housing and the second bearing housing. The at least one exit opening is operably coupled to the internal cavity of the rotor case. 1. A compressor casing having an internal gas passage comprising:a first bearing housing arranged at a first end of the casing;a second bearing housing arranged at a second, opposite end of the casing;a rotor case disposed between the first bearing housing and the second bearing housing, the rotor case including an axially extending bore within which a plurality of rotors are receivable and a hollow internal cavity isolated from the bore, wherein the internal cavity is fluidly coupled to the bore via at least one recess; andat least one exit opening formed in one of the first bearing housing and the second bearing housing, the at least one exit opening being operably coupled to the internal cavity of the rotor case.2. The compressor casing of claim 1 , wherein at least one of the first bearing housing and the second bearing housing includes the at least one recess fluidly coupling the bore to the internal cavity.3. The compressor casing of claim 2 , wherein the first bearing housing includes a first recess and the second bearing housing includes a second recess.4. The compressor casing of claim 3 , wherein the at least one recess is formed in the rotor case.5. The compressor casing of claim 1 , wherein the at least one exit opening includes a plurality of exit ...

SEALING DEVICE FOR OIL INJECTION-TYPE SCREW COMPRESSOR

A screw compressor of the present invention comprises: a housing having a compression chamber; male and female rotors provided in the compression chamber; a driving shaft for rotating the male and female rotors; and a seal cover across which the driving shaft is provided, and further includes: an oil chamber provided at the seal cover, and returning, to the compression chamber, oil having leaked into the driving shaft; and a breather for injecting external air into the oil chamber. Therefore, the breather is provided at the upper part of the oil chamber and an oil recovery line is provided at the lower part thereof so as to cause a pressure difference between the upper and lower parts of the oil chamber, such that the flow of the oil having leaked into the driving shaft is smoothly recovered in the oil recovery line. 1. A screw compressor comprising a housing having a compression chamber , male and female rotors provided in the compression chamber , a drive shaft for rotating the male and female rotors , and a seal cover across which the drive shaft is provided , the screw compressor further comprising:an oil chamber provided in the seal cover and returning oil, which leaks into the drive shaft, to the compression chamber; anda breather for injecting external air into the oil chamber.2. The screw compressor according to claim 1 , further comprising:a first lip seal provided between the seal cover and the drive shaft; anda second lip seal provided between the seal cover and the drive shaft,wherein the oil chamber is provided between the first lip seal and the second lip seal to return the oil, which leaks from in the first lip seal, to the compression chamber.3. The screw compressor according to claim 2 , further comprising an air supply line for supplying high-pressure air to the breather claim 2 , wherein an orifice is provided in the air supply line.4. The screw compressor according to claim 3 , wherein the air supply line is connected to an air oil separator tank ...

OIL-INJECTED VACUUM PUMP ELEMENT

An oil-injected vacuum pump element, whereby two mating helical rotors are rotatably provided in a housing, whereby this housing comprises an inlet port and an outlet end face with an outlet port, whereby compression chambers are formed between the helical rotors and the housing, wherein the vacuum pump element is provided with a connection that extends from a first compression chamber to a second smaller compression chamber at the outlet end face, whereby this first compression chamber is at a lower pressure than the second compression chamber and whereby this second compression chamber can make connection with the outlet port upon rotation of the helical rotors, whereby the connection is such that a flow from the second compression chamber to the first compression chamber is possible, whereby the connection is not directly connected to the outlet port. 19-. (canceled)10. An oil-injected vacuum pump element of the screw type , whereby two mating helical rotors are rotatably provided in a housing , whereby this housing comprises an inlet port , an inlet end face and an outlet end face with an outlet port , whereby compression chambers are formed between the helical rotors and the housing that proceed from the inlet port to the outlet port due to the rotation of the helical rotors and thereby become increasingly smaller , wherein the oil-injected vacuum pump element is provided with a connection that extends from a first compression chamber to a second smaller compression chamber at the outlet end face , whereby this first compression chamber is at a lower pressure than the second compression chamber and whereby this second compression chamber can make connection with the outlet port upon rotation of the helical rotors , whereby the connection is such that a flow from the second compression chamber to the first compression chamber is possible so that the pressure in the second compression chamber is reduced , whereby the connection is not directly connected to the ...

COMPRESSOR EXHAUST STRUCTURE, SCREW COMPRESSOR AND AIR-CONDITIONING UNIT HAVING SAME

Disclosed are a compressor exhaust structure, a screw compressor and an air-conditioning unit, wherein the compressor exhaust structure comprises a machine body (), an exhaust bearing seat () provided on an exhaust end of the machine body (), and an oil separating barrel () covering the exhaust bearing seat (). The exhaust bearing seat () is provided with a first exhaust chamber, the machine body () is provided with a second exhaust chamber (), and a third exhaust chamber is formed between the exhaust bearing seat () and an inner wall of the oil separating barrel (); the first exhaust chamber is in fluid communication with the second exhaust chamber (), the second exhaust chamber () is in fluid communication with the third exhaust chamber, and the third exhaust chamber is in fluid communication with a discharge port of the oil separating barrel (). The above-mentioned compressor exhaust structure enables gas flow to firstly enter the machine body () via the exhaust bearing seat () and then to flow out of the machine body (), which extends the flow path of the gas flow, facilitates the isolation of gas flow noise, and reduces gas flow pulsation. 1. A compressor exhaust structure , comprising:a machine body,an exhaust bearing seat provided at an exhaust end of the machine body, andan oil separating barrel covering the exhaust bearing seat,wherein:the exhaust bearing seat is provided with a first exhaust chamber, the machine body is provided with a second exhaust chamber, a third exhaust chamber is formed between the exhaust bearing seat and an inner wall of the oil separating barrel, the first exhaust chamber is in fluid communication with the second exhaust chamber, the second exhaust chamber is in fluid communication with the third exhaust chamber, and the third exhaust chamber is in fluid communication with a discharge port of the oil separating barrel.2. The compressor exhaust structure according to claim 1 , wherein an interior of the first exhaust chamber is ...

PULSATION MUFFLERS FOR COMPRESSORS

The invention is related to a pulsation muffler () for a gaseous medium flow (), which is supplied by a compressor. The pulsation muffler () comprises a housing () extending along a central axis with a medium flow inlet () and a medium flow outlet; several tubular absorber elements () concentrically arranged in the housing () and fluidically arranged one behind the other. Each tubular absorber element () is provided with an inlet area and an outlet area, positioned at an axial distance from each other. Between the respective radially adjacent wall sections of different absorber elements (), a flow compartment () is maintained for the medium flow (). 1100107. A pulsation muffler () for a gaseous medium flow () supplied by a compressor , the pulsation muffler comprising:{'b': 101', '106', '116, 'a housing () extending along a central axis with a medium flow inlet () and a medium flow outlet (); and'}{'b': 108', '101, 'claim-text': [{'b': '108', 'each of said tubular absorber elements () is provided with an inlet area and an outlet area, positioned at an axial distance from each other,'}, {'b': 108', '106', '101', '108', '108', '108', '116', '101, 'i': a', 'a', 'b', 'c, 'the inlet area of the fluidic front absorber element () is connected to the medium flow inlet () of the housing (), the outlet area of the fluidic front absorber element ( ) is connected to the inlet area of the next fluidic absorber element (), and the outlet area of the fluidic rear absorber element () is connected to the medium flow outlet () of the housing (), and'}, {'b': 112', '114', '107', '108, 'a flow compartment (, ) is maintained for the medium flow () between the respective radially adjacent wall sections of different absorber elements ().'}], 'a plurality of tubular absorber elements (), each made of sound-absorbing material, arranged concentrically in the housing (), wherein'}2100108. The pulsation muffler () according to claim 1 , characterized in that the absorber elements () have a ...

SCREW COMPRESSOR ELEMENT

A screw compressor element with a housing and two screw rotors that are affixed in the housing in a double cylindrical chamber provided to this end, whereby the housing is provided with an inlet opening on the inlet side of the screw compressor element, whereby the inlet opening extends in the cylindrical walls of the double cylindrical chamber with at least a section that extends in an axial direction, and a transverse section connecting thereto in the form of a strip that extends from the axial section on the inlet side to a side of the section in a direction transverse to the axial direction. 123-. (canceled)24. A screw compressor element for compressing gas , whereby this screw compressor element comprises a housing and two helical rotors that are rotatably affixed in the housing in a double cylindrical chamber provided to this end , composed of two single cylindrical rotor chambers that merge into one another along two axial ribs and whereby the double cylindrical chamber is defined by the cylindrical walls of the rotor chambers and two end faces of the housing , respectively an inlet end face on the inlet side and an outlet end face on the outlet side of the screw compressor element , whereby the housing is provided on the inlet side of the screw compressor element with an inlet opening for the supply of a gas to be compressed , wherein the inlet opening at least partially extends in the cylindrical walls of the rotor chambers with at least an axial section that extends in the axial direction on either side of one of the aforementioned axial ribs , and a transverse section connected thereto in the form of a strip that extends from the base of the axial section on the inlet side of the screw compressor element at a side of the axial section in a direction essentially transverse to the direction of the axial ribs and connects to the inlet end face on the inlet side or is at a distance therefrom.25. The screw compressor element according to claim 24 , wherein the ...

COMPRESSOR ELEMENT FOR A SCREW COMPRESSOR AND SCREW COMPRESSOR IN WHICH SUCH A COMPRESSOR ELEMENT IS APPLIED

A compressor element of a screw compressor inlet side and an outlet side and two helical rotors, respectively a male rotor with a drive for the male rotor and a female rotor that is driven by the male rotor by means of synchronisation gearwheels with at least one synchronisation gearwheel on the male rotor, wherein the drive and synchronisation gearwheels of the male rotor are chosen such that, upon being driven with acceleration of the rotors without gas forces, the resulting mechanical drive force that is exerted by this drive and by this synchronisation gearwheel on the male rotor has an axial component that is directed from the outlet side to the inlet side and that the movement of the male rotor in the axial direction from the outlet side to the inlet side is fixed by means of a single axial single-acting or double-acting bearing. 119-. (canceled)20. A compressor element of a screw compressor for compressing gas , with the compressor element comprising a housing with an inlet for the gas on the inlet side , and an outlet for the gas on the outlet side and two rotor chambers in which two helical rotors are mounted on bearings that upon being driven mesh together in order to compress the gas , respectively a male rotor with a drive for the male rotor and a female rotor that is driven by the male rotor by means of synchronisation gearwheels with at least one synchronisation gearwheel on the male rotor and one synchronisation gearwheel on the female rotor , wherein the drive and synchronisation gearwheels of the male rotor are chosen such that , upon being driven with acceleration of the rotors of the compressor element without gas forces , the resulting mechanical drive force that is exerted by this drive and by this synchronisation gearwheel on the male rotor has an axial component that is directed from the outlet side to the inlet side and that the movement of the male rotor in the axial direction from the outlet side to the inlet side is fixed by means of a ...

REFRIGERANT COMPRESSOR LUBRICANT VISCOSITY ENHANCEMENT

A compressor assembly is provided including an inlet bearing and an outlet bearing. A rotating compressor member is support for rotation on an inlet end by the inlet bearing and on an outlet end by the outlet bearing. A plurality of connecting passages is configured to supply lubricant to the inlet bearing and the outlet bearing. A first lubricant flow path is arranged downstream from a pressure reducing orifice. The first lubricant flow path is fluidly coupled to at least one of the plurality of connecting passages. At least a portion of the first lubricant flow path is arranged in a heat exchange relationship with a hot gas in discharge port such that the lubricant within the first lubricant flow path increases in viscosity. 1. A compressor assembly , comprising:an inlet bearing;an outlet bearing;a rotating compressor member supported for rotation on an inlet end by the inlet bearing and on an outlet end by the outlet bearing;a plurality of connecting passages for supplying lubricant to the inlet bearing and the outlet bearing; anda first lubricant flow path arranged downstream of a pressure reducing orifice, the first lubricant flow path being fluidly coupled to at least one of the plurality of connecting passages, wherein at least a portion of the first lubricant flow path is arranged in a heat exchange relationship with a hot gas in a discharge port such that a lubricant within the first lubricant flow path increases in viscosity.2. The compressor assembly according to claim 1 , wherein the first lubricant flow path includes a plurality of turns configured to increase a distance of the portion of the first lubricant flow path in a heat transfer relationship with the hot gas.3. The compressor assembly according to claim 2 , wherein the first lubricant flow path includes a conduit positioned within the hot refrigerant gas in the discharge port.4. The compressor assembly according to claim 2 , wherein at least a portion the first lubricant flow path wraps around ...

METHOD OF IMPROVING COMPRESSOR BEARING RELIABILITY

A compressor assembly is provided including a housing assembly. A first rotor and a second rotor are arranged within the housing assembly. The first rotor is supported for rotation by a first inlet bearing adjacent an inlet end of the housing assembly and by a first discharge bearing adjacent a discharge end of the housing assembly. The second rotor is supported for rotation by a second inlet bearing adjacent the inlet end of the housing assembly and by a second discharge bearing adjacent the discharge end of the housing assembly. A first lubricant flow path is configured to supply lubricant to more than one of the first discharge bearing, the first inlet bearing, the second discharge bearing, and the second inlet bearing generally sequentially. 1. A compressor assembly , comprising:a housing assembly;a first rotor arranged within the housing assembly, the first rotor being supported for rotation by a first inlet bearing adjacent an inlet end of the housing assembly and by a first discharge bearing adjacent a discharge end of the housing assembly;a second rotor arranged within the housing assembly, the second rotor being supported for rotation by a second inlet bearing adjacent the inlet end of the housing assembly and by a second discharge bearing adjacent the discharge end of the housing assembly; anda first lubricant flow path configured to supply lubricant from a lubricant reservoir to more than one of the first discharge bearing, the first inlet bearing, the second discharge bearing and the second inlet bearing generally sequentially.2. The compressor assembly according to claim 1 , where each of the first discharge bearing claim 1 , the first inlet bearing claim 1 , the second discharge bearing and the second inlet bearing is arranged generally downstream from a pressure-reducing orifice.3. The compressor assembly according to claim 1 , wherein the first lubricant flow path is configured to supply lubricant to the first discharge bearing and the second ...

OIL-FREE SCREW COMPRESSOR

An oil-free screw compressor has a screw rotor including a screw and a shaft, a bearing supporting the shaft, a first shaft seal device disposed between the screw and the bearing and including a first seal opposite to the shaft, and a first communication portion communicating the bearing side with respect to between the shaft and the first seal and the outer peripheral face of the first shaft seal device, and a second shaft seal device disposed between the first shaft seal device and the bearing and including a second seal opposite to the shaft, and a second communication portion communicating the screw side with respect to between the shaft and the second seal and the outer peripheral face of the second shaft seal device. A casing includes an atmosphere communication portion connected to both of the first communication portion and the second communication portion on the inner peripheral face of a shaft accommodation space, and communicating the first communication portion and the second communication portion with the atmosphere. 1. An oil-free screw compressor comprising:a screw rotor including a screw and a shaft;a bearing supporting the shaft;a first shaft seal device fitted on the shaft, disposed between the screw and the bearing, and including a first seal opposite to the shaft, and a first communication portion communicating the bearing side with respect to between the shaft and the first seal and the outer peripheral face of the first shaft seal device;a second shaft seal device fitted on the shaft, disposed between the first shaft seal device and the bearing, and including a second seal opposite to the shaft, and a second communication portion communicating the screw side with respect to between the shaft and the second seal and the outer peripheral face of the second shaft seal device; anda casing including a rotor chamber accommodating the screw, and a shaft accommodation space accommodating the shaft, the bearing, the first shaft seal device, and the ...

COMPRESSOR

A screw compressor () with at least one screw rotor () which is rotatably arranged about a rotational axis arranged in the axial direction. The at least one screw rotor () is arranged in a compression area () which is fluid-tight against the surrounding area at least in some sections and opens into a high-pressure volume (). The compressor () further has a Vi slide () for influencing an inner volume ratio of the compressor, the Vi slide () at least partly forming a section of the fluid-tight border of the compression area () and being arranged such that the position of the slide can be adjusted in the axial direction. The Vi slide () can be continuously displaced, and the compressor () has a device () for detecting the position of the slide. 1. A screw compressor having at least one screw rotor which is arranged such that it can be rotated about an axis of rotation arranged in the axial direction , wherein the at least one screw rotor is arranged in a compression space , which is designed to be at least in sections fluid-tight in the direction of the surroundings and opens out into a high-pressure volume , wherein the compressor also has a Vi slide for influencing an internal volume ratio of the compressor , wherein the Vi slide forms , at least in part , a portion of the fluid-tight boundary of the compression space and is arranged such that it can be displaced in position in the axial direction ,whereinthe Vi slide can be displaced in a stepless manner and the compressor has a device for sensing the slide position.2. The compressor as claimed in claim 1 , whereinthe Vi slide has a slide-position sensor or a position transducer.3. The compressor as claimed in claim 1 , whereinthe Vi slide has an axially arranged recess, in particular groove, of which the depth increases in the axial direction.4. The compressor as claimed in claim 3 , whereinthe compressor has a rod with two ends, wherein one end of the rod engages in the recess, and wherein the rod is in operative ...

Compressor system and system for maintaining a desired oil level

A compressor system includes: a compressor having a suction side and a discharge side, wherein the compressor is operative to compress a gas using oil, wherein the suction side operates at a suction pressure and is operative to receive a the gas and the oil into the compressor; and wherein the discharge side is operative to discharge the compressed gas and the oil; a gas/oil separator tank operative to store oil separated from the compressed gas for subsequent use by the compressor; a supplemental oil reservoir in fluid communication with the suction side; and a valve operative to, when opened, expose the supplemental oil reservoir to the suction pressure of the suction side of the compressor, and draw oil from the supplemental oil reservoir by suction into the suction side of the compressor.

COMPRESSOR

A screw-type compressor () for compressing refrigerant, which comprises: an electric motor (), which has a rotor () and a stator (); a drive shaft (); and a compressing device () having a compressor screw (); wherein the compressor screw () and the rotor () of the electric motor () are arranged against or on the drive shaft (), wherein the drive shaft () is rotatably supported by a first, a second, and a third radial bearing (), wherein the first radial bearing () is arranged between the rotor () of the electric motor () and the compressor screw (), wherein the second radial bearing () is arranged on a side of the compressor screw () opposite the first radial bearing (), and wherein the third radial bearing () is arranged on a side of the rotor () of the electric motor () opposite the first radial bearing (), wherein the first radial bearing and the second radial bearing are both designed as rolling-element bearings, and the third radial bearing () is designed as a plain bearing. 1. A screw compressor for compressing refrigerant , comprising an electric motor , which has a rotor and a stator , and also a drive shaft and a compressing device with a compressor screw , wherein the compressor screw and the rotor of the electric motor are arranged against or on the drive shaft , wherein the drive shaft is rotatably mounted by means of a first , a second and a third radial bearing , wherein the first radial bearing is arranged between the rotor of the electric motor and the compressor screw , wherein the second radial bearing is arranged on a side of the compressor screw opposite the first radial bearing , and wherein the third radial bearing is arranged on a side of the rotor of the electric motor opposite the first radial bearing , wherein the first radial bearing and the second radial bearing are each designed as rolling bearings , and the third radial bearing is designed as a plain bearing.2. The compressor as claimed in claim 1 , wherein the plain bearing ...

Screw Machine

A screw machine having a rotor housing portion and an outflow housing portion, screw rotors mounted in the rotor housing portion that form a rotor pair, and a control slide that is likewise mounted in the rotor housing portion, which delimits a working space of the rotor housing portion and which can be shifted parallel to the rotor axes of the screw rotors to change a size of the effective working space. The control slide, when shifted out of the rotor housing portion into the outflow housing portion, is guided by a positively joined guide of the outflow housing portion. 1. A screw machine , comprisinga machine housing having a rotor housing portion and an outflow housing portion;screw rotors mounted in the rotor housing portion that form a rotor pair;a control slide mounted in the rotor housing portion that delimits a compression space of the rotor housing portion and configured to be shifted parallel to a rotor axis of the screw rotors to changing a size of an effective working space such that the effective working space is made smaller as the control slide is shifted out of the rotor housing portion into the outflow housing portion; anda positively joined guide that is and configured to guide the control slide configured to guide the control slide as the control slide is shifted out of the rotor housing portion into the outflow housing portion.2. The screw machine according to claim 1 , wherein the positively joined guide of the outflow housing portion comprises a guide rod that supports and guides the control slide in a positively joined manner.3. The screw machine according to claim 2 , wherein the guide rod extends parallel to the rotor axis of the screw rotors.4. The screw machine according to claim 2 , wherein the guide rod is affixed to the outflow housing portion and has an end facing away from one or more of the rotor housing portion and the control slide.5. The screw machine according to claim 2 , wherein the guide rod is configured to support and guide ...

AIR COMPRESSION APPARATUS

The present application discloses an air compression apparatus mounted on a vehicle. The air compression apparatus includes a first air compressor configured to generate first compressed air, a first cooling fan configured to send first cooling wind in a first direction to cool the first air compressor, and a second air compressor aligned with the first air compressor in a second direction intersecting with the first direction. The second air compressor generates second compressed air.

LUBRICANT SUPPLY PASSAGE FOR COMPRESSOR

A fluid machine includes a first rotor rotatable about a first axis, a second rotor rotatable about a second axis, a casing for supporting said first rotor and said second rotor, a sump having a volume of lubricant contained therein, a first lubricant passage for supplying lubricant from the sump to a dynamic interface associated with the first rotor, and a second lubricant passage for supplying lubricant from the sump to a dynamic interface associated with the second rotor. A pressure differential created within the fluid machine supplies the lubricant from the sump to the first lubricant passage and the second lubricant passage. 1. A fluid machine comprising:a first rotor rotatable about a first axis;a second rotor rotatable about a second axis;a casing for supporting said first rotor and said second rotor;a sump having a volume of lubricant contained therein;a first lubricant passage for supplying lubricant from the sump to a dynamic interface associated with the first rotor; anda second lubricant passage for supplying lubricant from the sump to a dynamic interface associated with the second rotor, wherein a pressure differential created within the fluid machine supplies the lubricant from the sump to the first lubricant passage and the second lubricant passage.2. The fluid machine of claim 1 , wherein during operation of the fluid machine claim 1 , the pressure differential is formed between a high pressure adjacent at least one end of the casing and low pressure at a central location of the first rotor and the second rotor.3. The fluid machine of claim 1 , wherein said lubricant is supplied from said sump to said first lubricant passage and said second lubricant passage simultaneously.4. The fluid machine of claim 1 , wherein said first rotor is rotatably mounted to the casing without roller element bearings.5. The fluid machine of claim 1 , wherein the first rotor includes a first shaft rotatably mounted to the casing claim 1 , wherein at least one surface of ...

Screw compressor

A screw compressor includes a casing, a motor provided in the casing, a screw rotor inserted into a cylinder in the casing, a bearing holder, a drive shaft, a first bearing, and a second bearing. The cylinder is formed on a lateral side of the motor. The bearing holder is disposed on an opposite side of the screw rotor from the motor and adjacent to the screw rotor. The drive shaft is connected to the motor and the screw rotor. The first bearing is disposed adjacent to the screw rotor. The second bearing is disposed adjacent to the motor in an axial direction of the drive shaft. At least a portion of the first bearing is disposed inside the screw rotor.

CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR

A control valve includes: a first valve to control a flow rate of refrigerant flowing from a discharge chamber to a control chamber of a compressor; a second valve to control a flow rate of the refrigerant flowing from the control chamber to a suction chamber; a solenoid to generate a drive force in a first valve closing direction and a second valve opening direction; a biasing member to generate a biasing force in an first valve opening direction and a second valve closing direction; and a pressure sensing part to sense a pressure in the suction chamber or the control chamber, and generate a counterforce against the drive force. A state in which both of the first and second valves are open is present during an increase in the current supplied to the solenoid from zero to an upper limit current value, and an increase rate of an opening degree of the first valve is increased during a decrease in the current supplied to the solenoid, a predetermined lower limit current value being an inflection point of the increase. 1. A control valve applicable to a variable displacement compressor having a suction chamber , a discharge chamber , and a control chamber , and having a discharge capacity varied by regulating a pressure in the control chamber , the control valve comprising:a first valve provided between the discharge chamber and the control chamber, to control a flow rate of refrigerant flowing from the discharge chamber to the control chamber;a second valve provided between the control chamber and the suction chamber, to control a flow rate of the refrigerant flowing from the control chamber to the suction chamber;a solenoid to generate a drive force in a closing direction of the first valve and an opening direction of the second valve depending on an amount of supplied current;a biasing member to generate a biasing force in an opening direction of the first valve and a closing direction of the second valve; anda pressure sensing part to sense a pressure in the suction ...

SCREW COMPRESSOR

The screw compressor includes a first-stage compressor main body and a second-stage compressor main body for compressing fluid with screw rotors, a motor for driving the first-stage compressor main body and the second-stage compressor main body, and a gear box. The gear box is connected to the first-stage compressor main body, the second-stage compressor main body, and the motor; transmits a driving force of the motor to the screw rotors, and includes a first attachment hole for attaching the first-stage compressor main body and a second attachment hole for attaching the second-stage compressor main body; and is provided with an annular rib surrounding both of the first attachment hole and the second attachment hole. In the screw compressor, the vibration of the natural vibration mode which is most burdensome and should be reduced can be efficiently reduced. 1. A screw compressor comprising:a first-stage compressor main body and a second-stage compressor main body respectively configured to compress fluid with screw rotors;an electric motor configured to drive the first-stage compressor main body and the second-stage compressor main body; anda gear box connected to the first-stage compressor main body, the second-stage compressor main body, and the electric motor, configured to transmit a driving force of the electric motor to the screw rotors, including a first attachment hole for attaching the first-stage compressor main body and a second attachment hole for attaching the second-stage compressor main body, provided with an annular rib surrounding both of the first attachment hole and the second attachment hole.2. The screw compressor according to claim 1 , wherein the annular rib includes:a first rib region being a portion provided around the first attachment hole,a second rib region being a portion provided around the second attachment hole, anda third rib region being a region between the first rib region and the second rib region,wherein a maximum space in a ...

SCREW COMPRESSOR

A screw compressor includes a compressor main body , a motor , and a gearbox . The compressor main body includes screw rotors , and , rotor casings and accommodating therein the screw rotors , and , and main body casings and accommodating therein the rotor casings and , the main body casings being provided with first flanges and on respective ends thereof. The motor drives the screw rotors , and via gears and . The gearbox has an attachment surface Son which the first flange to the main body casings and is attached, accommodates therein the gears and , and has a substantially rectangular shape. In a state where the compressor main body is attached to the gearbox , a part of the first flange extends to an outside of the attachment surface S, and projection regions of the rotor casings and onto the attachment surface S exist within the attachment surface S. In this way, vibrations of the screw compressor can be reduced. 1. A screw compressor , comprising:a compressor main body including screw rotors, a rotor casing accommodating therein the screw rotors, and a main body casing accommodating therein the rotor casing, the main body casing having a first flange provided on an end thereof;an electric motor for driving the screw rotors via a gear; anda substantially rectangular gearbox accommodating therein the gear, having an attachment surface on which attaching the first flange of the main body casing is attached,wherein in a state where the compressor main body is attached to the gearbox, a part of the first flange extends to an outside of the attachment surface, and a projection region of the rotor casing onto the attachment surface exists within the attachment surface.3. The screw compressor according to claim 1 , wherein the compressor main body is disposed at the gearbox such that a strong axis direction of the main body casing against vibration is within a range from −45 degrees to +45 degrees with respect to a weak axis direction of the gearbox against the ...

SOUND CONTROL FOR A HEATING, VENTILATION, AND AIR CONDITIONING UNIT

Systems and methods to isolate a vibration source (e.g., a compressor) externally are disclosed. The embodiments generally include preventing/reducing vibration and/or pulsation transmission from the vibration source by one or more functional/structural isolating members, and preventing/reducing sound radiated from the vibration source by one or more sound enclosures. 1. An external isolation system for a vibration source , comprising:a sound enclosure configured to surround the vibration source so as to reduce sound radiated from the vibration source;a structural isolating member configured to support the vibration source and passively damp vibrations and/or pulsations; anda functional isolating member configured to maintain a functional connection with the vibration source.2. The external isolation system of claim 1 , wherein the functional isolating member includes a muffler equipped to a working fluid port of the vibration source.3. The external isolation system of claim 1 , wherein the functional isolating member includes an isolating conduit equipped to a working fluid port of the vibration source claim 1 , and the isolating conduit is configured to allow a working fluid to pass through.4. The external isolation system of claim 2 , wherein the working fluid port includes a discharge port of the vibration source or a suction port of the vibration source.5. The external isolation system of claim 1 , wherein the vibration source includes a screw compressor.6. The external isolation system of claim 1 , wherein the functional isolating member includes a bellow-like region.7. A method of providing external sound control to a vibration source claim 1 , comprising:reducing vibration transmission between a vibration source and a functional component;reducing vibration transmission between the vibration source and a support structure supporting the vibration source; andreducing sound radiated from the vibration source.8. The method of claim 7 , wherein the reducing ...

Screw Compressor System for a Utility Vehicle

A screw compressor system for a utility vehicle has at least one screw compressor, at least one screw compressor drive, at least one temperature probe and at least one control and regulation unit. The control and/or regulation unit is connected to the screw compressor drive and to the temperature probe and is designed and configured such that it controls, in accordance with a temperature threshold signal obtained from the temperature probe, the screw compressor drive with respect to a rotational speed. 19-. (canceled)10. A screw compressor system for a utility vehicle , comprising:at least one screw compressor;at least one screw compressor drive;at least one temperature sensor; andat least one open-loop and/or closed-loop control unit, whereinthe open-loop and/or closed-loop control unit is connected to the screw compressor drive and to the temperature sensor,the open-loop and/or closed-loop control unit is configured so as to control the screw compressor drive with regard to a rotational speed thereof in a manner dependent on a temperature threshold value signal received from the temperature sensor.11. The screw compressor system as claimed in claim 10 , whereinthe open-loop and/or closed-loop control unit is a constituent part of the screw compressor.12. The screw compressor system as claimed in claim 10 , whereinthe open-loop and/or closed-loop control unit is a constituent part of an air treatment system of the utility vehicle.13. The screw compressor system as claimed in claim 10 , whereinthe open-loop and/or closed-loop control unit is a constituent part of an engine or vehicle controller of the utility vehicle.14. The screw compressor system as claimed in claim 10 , whereinthe open-loop and/or closed-loop control unit is a separate open-loop and/or closed-loop control unit.15. The screw compressor system as claimed in claim 10 , whereinthe open-loop and/or closed-loop control unit is configured to deactivate the screw compressor drive upon receipt of a ...

Screw Compressor and Air Conditioning Unit

The present disclosure discloses a screw compressor and an air-conditioning unit, and relates to the field of compressors. The screw compressor has a first pressure level rotor assembly, a second pressure level rotor assembly and a body. The first pressure level rotor assembly has a first pressure level male rotor and a first pressure level female rotor; the second pressure level rotor assembly has a second pressure level male rotor and a second pressure level female rotor. Wherein, the first pressure level rotor assembly and the second pressure level rotor assembly are configured to enable an axial force received by the first pressure level rotor assembly and exerted by a compressed gas opposite to an axial force received by the second pressure level rotor assembly and exerted by a compressed gas. The force received during the operational process of the screw compressor is more balanced. 1. A screw compressor , comprising:a first pressure level rotor assembly comprising a first pressure level male rotor and a first pressure level female rotor that mesh with each other;a second pressure level rotor assembly comprising a second pressure level male rotor and a second pressure level female rotor that mesh with each other; anda body in which the first pressure level rotor assembly and the second pressure level rotor assembly are arranged;wherein the first pressure level rotor assembly and the second pressure level rotor assembly are configured to enable an axial force received by the first pressure level rotor assembly and exerted by a compressed gas in the first pressure level rotor assembly opposite to an axial force received by the second pressure level rotor assembly and exerted by a compressed gas therein.2. The screw compressor according to claim 1 , wherein the first pressure level male rotor and the second pressure level male rotor are coaxially arranged.3. The screw compressor according to claim 1 , further comprising:a motor disposed between the first pressure ...

Screw fluid machinery

Screw type vacuum pump

Patent DE3143328C2

Compressor Body and Compressor

A compressor body includes a compression mechanism including a screw rotor that compresses gas, a casing that accommodates the compression mechanism and defines a compression working chambers therein, a suction side bearing that rotatably supports the screw rotor, a bearing chamber that accommodates the suction side bearing, and a liquid supply port that communicates with the compression working chambers and supplies liquid supplied from the outside of the casing into the compression working chambers. The casing has an internal liquid supply flow path that extends from a discharge side of the compression working chambers as an upstream side to a suction side of the compression working chambers as a downstream side and that supplies the liquid to the liquid supply port. The internal liquid supply flow path has a downstream portion reaching the bearing chamber and supplies the liquid to the suction side bearing. 1. A compressor body comprising:a compression mechanism including at least one screw rotor that compresses gas;a casing that accommodates the compression mechanism and defines compression working chambers therein;a suction side bearing that rotatably supports the at least one screw rotor;a bearing chamber that accommodates the suction side bearing; andat least one liquid supply port that communicates with the compression working chambers, the at least one liquid supply port being configured to supply liquid supplied from an outside of the casing into the compression working chambers, whereinthe casing has an internal liquid supply flow path that extends from a discharge side of the compression working chambers as an upstream side to a suction side of the compression working chambers as a downstream side, the internal liquid supply flow path being configured to supply the liquid to the at least one liquid supply port, andthe internal liquid supply flow path has a first flow path whose downstream portion reaches the bearing chamber, the first flow path being ...