MULTIPLE-PUMP VALVE MONITORING SYSTEM

A monitoring system may include strain gauges and position sensors corresponding to multiple pressure pumps. The strain gauge for each pressure pump may measure the strain in a respective chamber of each pump. The position sensor for each pump may measure the position of a rotating member of each pump. The monitoring system may also include one or more computing devices for determining actuation delays associated with valves corresponding to the respective chamber of each pump using expected actuation points and actual actuation points of the valves. The computing devices may compare the actuation points for the valves of all of the pressure pumps to determine a condition of a valve in one of the pressure pumps.

Electronic camshaft motor control for piston pump

A two (or more) piston pump system (10) is provided with both pumps (12) being crank (14) driven. The system does not have a mechanical camshaft, but a software algorithm, which acts like one in controller (20). The algorithm will learn and create a unique speed profile, which will mimic the mechanical camshaft. For practical purposes the speed profile of output gear is called Cam profile with software acting as an imaginary camshaft. The algorithm utilizes Crank Angle Estimation, Learn Curve Generation, Smoothing and Advance Timing Calculation.

SEALER PUMP ASSEMBLY AND METHOD OF CONTROLLING SAME

DISPOSABLE CASSETTE WITH NEGATIVE HEAD HEIGHT FLUID SUPPLY AND METHOD

A fluid infusion pump includes a disposable cassette (12) having an inlet (16), an outlet (24), and a fluid chamber (36) between the inlet and the outlet. There is a fixed wall (180) of the fluid chamber and a movable wall (182) of the fluid chamber. A pump body (26) receives the cassette in a fixed operating relationship such that an actuator (62) in the pump body is activatable for reciprocal advancement and retraction with respect to the cassette and is adapted to confront the movable diaphragm when the cassette is received in the pump body. There is a detachable coupling (44) between the actuator mounted in the pump body and the movable wall so that fluid is expelled from the fluid chamber on advancement of the actuator and positively drawn into the fluid chamber upon retraction of the actuator.

Marine steering system having dual hydraulic and electronic output

A marine steering system operable in either power steering or manual hydraulic modes. The system employs a modified helm pump having a single rotatable input shaft connectable to a steering wheel and dual hydraulic and electronic output. An encoder, such as an optical incremental encoder or hall effect device, is mechanically coupled to the input shaft for generating an electronic steering control signal representative of the change in position of the steering wheel. In the power steering mode, the electronic steering signal is processed by an amplifier controlling the operation of an auxiliary pumpset connected to the rudder steering cylinder. A bypass manifold disposed between the helm pump and the steering cylinder disables the hydraulic steering system in the power steering mode. In the event of power failure, the bypass manifold valves are opened and the system automatically switches to manual hydraulic steering.

Pump-engine controller

A system controller manages a gas turbine engine driving a pump directly or indirectly coupled to the engine. The controller is programmed to automatically determine and adjust inputs to the gas turbine engine in order to cause the pump to produce a user-specified hydraulic output.

MCS ADVERSE EVENT RISK SCORE

A method of predicting an adverse event associated with an implantable blood pump including determining a plurality of pump parameters, comparing the plurality of pump parameters to a plurality of threshold values corresponding to the plurality of pump parameters, calculating a weighted sum using the compared plurality of pump parameters to the plurality of threshold values, calculating an adverse event risk score using the calculated weighted sum, and generating an alert when the calculated adverse event risk score deviates from a predetermined value. 1. A method of predicting an adverse event associated with an implantable blood pump , the method comprising:determining a plurality of pump parameters;comparing the plurality of pump parameters to a plurality of threshold values corresponding to the plurality of pump parameters;calculating a weighted sum using the compared plurality of pump parameters to the plurality of threshold values;calculating an adverse event risk score using the calculated weighted sum; andgenerating an alert when the calculated adverse event risk score deviates from a predetermined value.2. The method according to claim 1 , further comprising determining a plurality of pump operational parameters and using the plurality of pump operational parameters to determine the plurality of pump parameters claim 1 , the plurality of pump operational parameters including at least one of a group consisting of a power claim 1 , a flow value claim 1 , and a pump speed.3. The method according to claim 1 , wherein the plurality of threshold values includes a power tracking limit and the plurality of pump parameters includes a power deviation with respect to the power tracking limit.4. The method according to claim 1 , wherein the plurality of pump parameters includes a suction burden and the plurality of threshold values includes a suction percentage threshold value for comparing to the suction burden.5. The method according to claim 1 , wherein the ...

MARINE STEERING SYSTEM HAVING DUAL HYDRAULIC AND ELECTRONIC OUTPUT

A marine steering system operable in either power steering or manual hydraulic modes. The system employs a modified helm pump having a single rotatable input shaft connectable to a steering wheel and dual hydraulic and electronic output. An encoder, such as an optical incremental encoder or hall effect device, is mechanically coupled to the input shaft for generating an electronic steering control signal representative of the change in position of the steering wheel. In the power steering mode, the electronic steering signal is processed by an amplifier controlling the operation of an auxiliary pumpset connected to the rudder steering cylinder. A bypass manifold disposed between the helm pump and the steering cylinder disables the hydraulic steering system in the power steering mode. In the event of power failure, the bypass manifold valves are opened and the system automatically switches to manual hydraulic steering.

MULTIPLE-PUMP VALVE MONITORING SYSTEM

A monitoring system may include strain gauges and position sensors corresponding to multiple pressure pumps. The strain gauge for each pressure pump may measure the strain in a respective chamber of each pump. The position sensor for each pump may measure the position of a rotating member of each pump. The monitoring system may also include one or more computing devices for determining actuation delays associated with valves corresponding to the respective chamber of each pump using expected actuation points and actual actuation points of the valves. The computing devices may compare the actuation points for the valves of all of the pressure pumps to determine a condition of a valve in one of the pressure pumps.

Pump

A peristaltic pump 1, and fluid delivery system or array incorporating such a pump, comprising a carrier member 12 having, at least partially, around an outer surface a flexible tubing with a fluid inlet (34, fig.5) and outlet 10 and a drivable compression roller 16 which in operation compresses the flexible tubing between itself and the carrier and cause the carrier to rotate and the fluid in the flexible tubing to be conveyed from the inlet to the outlet. Preferably, the tubing fits between circumferential flanges or ridges (28, fig.4) around the carrier and the roller sits between the flanges. A motor 18 drives the roller which may be an elongate cylinder with a circumference that is smaller than the carriers in a ratio of 1:10 to 1:20. The pump can be used in a fluid delivery system for mixing fluids stored in an array (fig.11) of similar containers 20 and controlled by a computer for delivery of measured doses; a fitting 22 can link the carrier and the container or reservoir. Particularly ...

System and method for automatically controlling one or multiple turbogenerators

At least one controller manages a gas turbine engine driving a generator directly or indirectly coupled to the engine. The controller is programmed to automatically determine and adjust inputs to the gas turbine engine in order to cause the generator to produce a user-specified electrical output. Multiple sets of generator, engine, and controller may be used, in which case a master controller individually manages the other controllers to collectively provide the a user-specified electrical output.

MARINE STEERING SYSTEM HAVING DUAL HYDRAULIC AND ELECTRONIC OUTPUT

... 24 A marine steering system operable in either power steering or manual hydraulic modes. The system employs a modified helm pump having a single rotatable input shaft connectable to a steering wheel and dual hydraulic and electronic output. An encoder, such as an optical incremental encoder or hall effect device, is mechanically coupled to the input shaft for generating an electronic steering control signal representative of the change in position of the steering wheel. In the power steering mode, the electronic steering signal is processed by an amplifier controlling the operation of an auxiliary pumpset connected to the rudder steering cylinder. A bypass manifold disposed between the helm pump and the steering cylinder disables the hydraulic steering system in the power steering mode. In the event of power failure, the bypass manifold valves are opened and the system automatically switches to manual hydraulic steering.

DISPOSABLE CASSETTE WITH NEGATIVE HEAD HEIGHT FLUID SUPPLY AND METHOD

A fluid infusion pump includes a disposable cassette (12) having an inlet (16), an outlet (24), and a fluid chamber (36) between the inlet and the outlet. There is a fixed wall (180) of the fluid chamber and a movable wall (182) of the fluid chamber. A pump body (26) receives the cassette in a fixed operating relationship such that an actuator (62) in the pump body is activatable for reciprocal advancement and retraction with respect to the cassette and is adapted to confront the movable diaphragm when the cassette is received in the pump body. There is a detachable coupling (44) between the actuator mounted in the pump body and the movable wall. The disposable cassette further includes an actuating means adapted to magnetically and detachably engage a magnetically attractable means attached to a movable wall of the disposable cassette and a relatively rigid carrier having concave indentations.

RECIPROCATING COMPRESSOR

PROBLEM TO BE SOLVED: To improve the durability of a thrust bearing and reduce the power loss by regulating the pressure of a crank chamber according to the sliding quantity of a drive shaft, and controlling the relation of the pressure of a cylinder bore with the pressure of the crank chamber so as to keep the average value of the thrust fluctuating load at zero. SOLUTION: In a single head reciprocating fixed displacement type compressor, an axially forward thrust fluctuating load acts on a drive shaft 16 through a piston 35 and a swash plate 31 according to the intermittent compressing motion of coolant gas, and the load is received by a thrust bearing 32. On the other hand, the blowby from a cylinder bore 33 or a high-pressure coolant gas passed through feed passages 18, 12a, 44 is supplied to a crank chamber 15, and its pressure works an axially backward thrust load to the drive shaft 16. The relation of the pressure of the cylinder bore 33 with the pressure of the crank chamber 15 ...

DISPOSABLE CASSETTE WITH NEGATIVE HEAD HEIGHT FLUID SUPPLY AND METHOD

A fluid infusion pump includes a disposable cassette (12) having an inlet (16), an outlet (24), and a fluid chamber (36) between the inlet and the outlet. There is a fixed wall (180) of the fluid chamber and a movable wall (182) of the fluid chamber. A pump body (26) receives the cassette in a fixed operating relationship such that an actuator (62) in the pump body is activatable for reciprocal advancement and retraction with respect to the cassette and is adapted to confront the movable diaphragm when the cassette is received in the pump body. There is a detachable coupling (44) between the actuator mounted in the pump body and the movable wall. The disposable cassette further includes an actuating means adapted to magnetically and detachably engage a magnetically attractable means attached to a movable wall of the disposable cassette and a relatively rigid carrier having concave indentations.

Disposable cassette with negative head height fluid supply and method

A fluid infusion pump includes a disposable cassette having an inlet, an outlet, and a fluid chamber between the inlet and the outlet. There is a fixed wall of the fluid chamber and a movable wall of the fluid chamber. A pump body receives the cassette in a fixed operating relationship such that an actuator in the pump body is activatable for reciprocal advancement and retraction with respect to the cassette and is adapted to confront the movable diaphragm when the cassette is received in the pump body. There is a detachable coupling between the actuator mounted in the pump body and the movable wall so that fluid is expelled from the fluid chamber on advancement of the actuator and positively drawn into the fluid chamber upon retraction of the actuator.

Operating Device, Method For Operating An Operating Device, Diaphragm Pump Having An Operating Device And A Diaphragm Pump Device, And A Blood Treatment Apparatus Having A Diaphragm Pump

The invention relates to an actuating device (1) for mechanically controlling a membrane pump device (2), having a base body (4) which comprises a mounting face (7) for a membrane pump device (2) and through which a control fluid line (33, 35) passes which extends from a control fluid port (78, 79) to a control fluid opening (34, 36) which opens at the mounting face (7), a control fluid valve (74, 75) being arranged in the control fluid line (33, 35), which control fluid valve is designed to influence a cross section of the control fluid line (33, 35), and having an adjustment device (9, 14), which comprises a fluid actuator (38) arranged on the mounting face (7) for providing an adjustment movement, and a working fluid valve (81, 82) which is designed to influence a cross section of a working fluid line (85, 86) which passes through the base body (4), and the control fluid valve (74, 75) and the working fluid valve (81, 82) being electrically connected to a control device (70) which is ...

SYSTEM AND METHOD FOR OPERATING A SYSTEM

Die Erfindung bezieht sich auf ein System (1) aufweisend: - ein Bau- und/oder Dickstoffbewegungssystem (2), wobei das Bau- und/oder Dickstoffbewegungssystem (2) zur Bewegung von Bau- und/oder Dickstoff (BDS) ausgebildet ist, - ein Verbrennungsmotorantriebssystem (3), wobei das Verbrennungsmotorantriebssystem (3) zum Antrieb des Bau- und/oder Dickstoffbewegungssystems (2) ausgebildet ist und eine mechanische Drehzahlsteuerung (4) aufweist, und - ein Aktorsystem (5), wobei das Aktorsystem (5) zur mechanischen Bewegung der Drehzahlsteuerung (4) ausgebildet ist.

Betätigungseinrichtung und Verfahren zum Betreiben einer Betätigungseinrichtung sowie Membranpumpe mit einer Betätigungseinrichtung und einer Membranpumpeneinrichtung und eine Blutbehandlungsvorrichtung mit einer Membranpumpe

Die Erfindung betrifft eine Betätigungseinrichtung (1) zur mechanischen Ansteuerung einer Membranpumpeneinrichtung (2), mit einem Grundkörper (4), der eine Montagefläche (7) für eine Membranpumpeneinrichtung (2) umfasst und der von einer Steuerfluidleitung (33, 35) durchsetzt ist, die sich von einem Steuerfluidanschluss (78, 79) bis zu einer Steuerfluidmündung (34, 36) erstreckt, die an der Montagefläche (7) ausmündet, wobei in der Steuerfluidleitung (33, 35) ein Steuerfluidventil (74, 75) angeordnet ist, das für eine Beeinflussung eines Querschnitts der Steuerfluidleitung (33, 35) ausgebildet ist, sowie mit einer Stelleinrichtung (9, 14), die einen an der Montagefläche (7) angeordneten Fluidaktor (38) zur Bereitstellung einer Stellbewegung und ein Arbeitsfluidventil (81, 82) umfasst, das für eine Beeinflussung eines Querschnitts einer Arbeitsfluidleitung (85, 86) ausgebildet ist, die den Grundkörper (4) durchsetzt, und wobei das Steuerfluidventil (74, 75) und das Arbeitsfluidventil (81 ...

ELECTRIC OIL PUMP SYSTEM AND CONTROLLING METHOD OF ELECTRIC OIL PUMP

It is provided an electric oil pump system and a controlling method of an electric oil pump. The electric oil pump system includes an electric oil pump and an electronic control unit. The electronic control unit is configured to accumulate driving time of the electric oil pump, predict driving time of the electric oil pump that will occur in the future, and determine degradation of the electric oil pump by taking into account an accumulated driving time and a predicted driving time. 1. An electric oil pump system comprising:an electric oil pump; andan electronic control unit, the electronic control unit being configured to,accumulate driving time of the electric oil pump,predict driving time of the electric oil pump that occurs in the future, anddetermine degradation of the electric oil pump by taking into account an accumulated driving time and a predicted driving time, the accumulated driving time being a driving time of the electric oil pump which the electronic control unit accumulates, and the predicted driving time being a driving time of the electric oil pump which the electronic control unit predicts.2. The electric oil pump system according to claim 1 , wherein the electric oil pump includes a motor and an oil pump claim 1 , the motor being configured to generate a driving force of the oil pump claim 1 , the oil pump including a rotor configured to be rotated by the driving force of the motor and being configured to pump oil by the rotor.3. The electric oil pump system according to claim 1 , wherein the electronic control unit is configured to predict the predicted driving time based on a distance from a current location to a destination of a vehicle which is mounted with the electric oil pump and a speed of the vehicle.4. The electric oil pump system according to claim 1 , further comprising a notification device configured to notify a user of the degradation of the electric oil pump when the electronic control unit determines that the electric oil pump is ...

Method for detecting pump-off of a rod pumped well

A method for monitoring a rod pumped well and detecting when the well is pumped off. The method utilizes the measured rod load and position for each stroke to set load limits and position limits. The load limits and position limits are set as predetermined percentages of the difference between the maximum and minimum measured rod load and position. The area within the thus determined load and position limits is determined to detect when the well has pumped-off.

Multi-compatible digital engine controller

A digital engine controller compatible with multiple variants of gas turbine engine is programmed to receive identification of a variant of gas turbine engine coupled to the digital controller and thereafter to automatically determine and adjust inputs to the engine, according to the received identification of engine variant, to meet user-specified output.

Constant Net Implement Pump Valve Flow

A control system for a machine having a cylinder and an accessory is disclosed. The control system may include a pump configured to provide fluid to the cylinder and the accessory, and a controller operatively connected to the pump. The controller may be configured to operate the pump to provide a primary flow to the cylinder at up to a predetermined maximum level for the cylinder. The predetermined maximum level for the cylinder may be less than a maximum flow capability of the pump. The controller may also be configured to operate the pump to provide a secondary flow to the accessory utilizing a remaining fluid.

Proportioning pump, control systems and applicator apparatus

An absolute proportioning pumping system includes an electric motor assembly powering a first pump at a first flow rate and powering a second pump at a second flow rate. A proportioned fluid output includes a first fluid pumped by the first pump and a second fluid pumped by the second pump. The pumping system provides a desired ratio of the first fluid to the second fluid at the proportioned fluid output, relatively independently of pressure and flow rate at the output. In accord with further embodiments, a pump and motor assembly is mounted to and generally surrounded by a liquid tank. The pump and motor assembly may include a pair of fixed ratio outputs driven from a common motor, or may include a single variable output pump either slaved to a master pump or controlled through a timed bypass valve to control output flow rate.

Rod-pump controller

A rod-pump control device is disclosed. The rod-pump control device uses AMP (current) measurements for electric units, fuel or air usage for gas units, and can use pressure for either unit. The AMP/fuel/air sensors work as the primary trigger to indicate a pump-off condition on an oil and gas well. These sensors can be used as stand-alone triggers or in conjunction with other sensors to more accurately monitor pump efficiency. When the pump-controller starts to indicate an inefficient pump condition, it will turn the pump off by removing power from the electric motor. For gas powered units, the controller will remove power to disengage an electric clutch or send a signal to an engine controller to stop. An adjustable algorithm will use percentage change of off time, dependent on actual run time compared to a user definable target time to keep the pump operating at peak efficiency.

Method for detecting pump-off of a rod pumped well

A method for monitoring a rod pumped well and detecting when the well is pumped off. The method utilizes the measured rod load and position for each stroke to set load limits and position limits. The load limits and position limits are set as predetermined percentages of the difference between the maximum and minimum measured rod load and position. The area within the thus determined load and position limits is determined to detect when the well has pumped-off.

Hydraulic fan drive for cooling system of e.g. diesel engine of mobile operating machine, has variable flow pump driven by diesel engine, where drive is disconnected in dependence of load and rotation speed of diesel engine

The drive has a variable flow pump (20) driven by a diesel engine (18), and a fixed displacement motor (33) driven by the variable flow pump, where the drive is disconnected in dependence of a load and rotation speed of the engine. A fan wheel (34) is driven by the fixed displacement motor and coupled on the displacement motor. A shut-off valve (38) is arranged in a main pipe (32) between the flow pump and the fixed displacement motor, and the fan drive is turned off by an electronic control unit (13). A pressure regulating valve (15) is controlled by the control unit.

Elektrisches Ölpumpensystem und Steuerungsverfahren einer elektrischen Ölpumpe

Ein elektrisches Ölpumpensystem und ein Steuerungsverfahren einer elektrischen Ölpumpe ist bereitgestellt. Die elektrische Ölpumpe hat eine elektrische Ölpumpe (61) und eine elektronische Steuerungseinheit (100). Die elektronische Steuerungseinheit (100) ist konfiguriert, um eine Antriebszeit der elektrischen Ölpumpe (61) aufzuaddieren, eine Antriebszeit der elektrischen Ölpumpe (61) zu prognostizieren, welche künftig auftreten wird, und eine Verschlechterung der elektrischen Ölpumpe (61) unter Berücksichtigung einer aufaddierten Antriebszeit und einer prognostizierten Antriebszeit zu bestimmen.

ELECTRONIC CAMSHAFT MOTOR CONTROL FOR PISTON PUMP

A two (or more) piston pump system (10) is provided with both pumps (12) being crank (14) driven. The system does not have a mechanical camshaft, but a software algorithm, which acts like one in controller (20). The algorithm will LEARN and create a unique speed profile, which will mimic the mechanical camshaft. For practical purposes the speed profile of output gear is called Cam profile with software acting as an imaginary camshaft. The algorithm utilizes Crank Angle Estimation, Learn Curve Generation, Smoothing and Advance Timing Calculation.

Proportioning pump, control systems and applicator apparatus

An absolute proportioning pumping system includes an electric motor assembly powering a first pump at a first flow rate and powering a second pump at a second flow rate. A proportioned fluid output includes a first fluid pumped by the first pump and a second fluid pumped by the second pump. The pumping system provides a desired ratio of the first fluid to the second fluid at the proportioned fluid output, relatively independently of pressure and flow rate at the output. In accord with further embodiments, a pump and motor assembly is mounted to and generally surrounded by a liquid tank. The pump and motor assembly may include a pair of fixed ratio outputs driven from a common motor, or may include a single variable output pump either slaved to a master pump or controlled through a timed bypass valve to control output flow rate.

ELECTRONIC CAMSHAFT MOTOR CONTROL FOR PISTON PUMP

A two (or more) piston pump system (10) is provided with both pumps (12) being crank (14) driven. The system does not have a mechanical camshaft, but a software algorithm, which acts like one in controller (20). The algorithm will LEARN and create a unique speed profile, which will mimic the mechanical camshaft. For practical purposes the speed profile of output gear is called Cam profile with software acting as an imaginary camshaft. The algorithm utilizes Crank Angle Estimation, Learn Curve Generation, Smoothing and Advance Timing Calculation. © KIPO & WIPO 2009 ...

Method of making a disposable cassette with negative head height fluid supply

A method of radio frequency (RF) welding of a flexible PVC sheet to a rigid copolyester carrier by holding a flexible PVC sheet and a rigid copolymer carrier together between heated RF dies. A predetermined temperature differential is maintained between the RF dies, with the flexible sheet side at a higher temperature than the rigid carrier side and adjusted so that a weld plane is established along the interface between the PVC and the copolyester. An RF weld signal is passed through the first and second RF dies and the PVC and copolyester therebetween, so that the flexible PVC sheet and the copolyester rigid carrier partially melt and become welded together at the weld plane.

PIEZOELECTRIC MICROBLOWER

Provided is a piezoelectric microblower which can be made compact while attaining good blower characteristics. At a part of a blower chamber (4) corresponding to the central portion of a vibration board (50), a resonance space (34) is formed by providing a partition (33) around an opening (31) and the size of the resonance space (34) is set such the drive frequency of the vibration board (50) corresponds to the Helmholtz’s resonance frequency of the resonance space (34). Between the partition (33) and the vibration board (50), a gap δ is formed to prevent contact when the vibration board is displaced. Flow rate can be increased by utilizing air resonance.

Crankcase pressure control for swash plate compressor

A piston-type compressor includes a crank chamber (15), a drive shaft (16), cylinder bores (33), and a valve plate (14). The drive shaft (16) passes through the crank chamber (15), and the valve plate is fixed to the rear of the cylinder bores (33). The drive shaft (16) includes a valve body (47). The rear end surface (47a) of the valve body (47) and the front surface of the valve plate (14) form a valve mechanism (46). The valve mechanism (46) is located in the pressurizing passage (18, 12a, 44). The valve mechanism (46) adjusts the opening size of the pressurizing passage (18, 12a, 44) in accordance with the axial movement of the drive shaft (16) from a reference position. This maintains an appropriate relationship between the pressure in the cylinder bores (33) and the pressure in the crank chamber (15).

Membranpumpe und Verfahren zur berührungslosen Betätigung der Membranen von mehreren Arbeitsräumen einer Membranpumpe

Dargestellt und beschrieben ist eine Membranpumpe (1) zum Fördern eines gasförmigen und/oder flüssigen Mediums, mit wenigstens einer verformbaren Membran (2) zum Verändern der Größe eines Arbeitsraums (3) der Membranpumpe (1) und mit wenigstens einer Aktoreinheit (4) zum Verformen der Membran (2) durch berührungsloses Beaufschlagen der Membran (2) mittels eines magnetischen Feldes, wobei die Membran (2) ein Material umfasst oder aus einem Material besteht, das magnetisch und/oder magnetisierbar ist, und die Aktoreinheit (4) wenigstens ein magnetisches und/oder magnetisierbares Aktormittel (7) aufweist. Erfindungsgemäß ist die Aktoreinheit (4) drehbar gelagert und die Membran (2) umfangsseitig zur Aktoreinheit (4) angeordnet, wobei in einer Totpunktstellung der Membran (2) die Polarisationsrichtung des zwischen dem Material der Membran (2) und dem Aktormittel (7) ausgebildeten Magnetfeldes radial zur Drehachse der Aktoreinheit (4) ausgerichtet ist.

Piezoelectric microblower

Disposable cassette with negative head height fluid supply

A fluid infusion pump includes a disposable cassette having an inlet, an outlet, and a fluid chamber between the inlet and the outlet. There is a fixed wall of the fluid chamber and a movable wall of the fluid chamber. A pump body receives the cassette in a fixed operating relationship such that an actuator in the pump body is activatable for reciprocal advancement and retraction with respect to the cassette and is adapted to confront the movable diaphragm when the cassette is received in the pump body. There is a detachable coupling between the actuator mounted in the pump body and the movable wall so that fluid is expelled from the fluid chamber on advancement of the actuator and positively drawn into the fluid chamber upon retraction of the actuator.

Method and system for diagnosing abnormality of hydraulic device

An abnormality diagnosis method is targeted at a hydraulic device which includes a hydraulic pump and a driven device driven by the hydraulic pump. The method includes calculating a frequency distribution with regard to a deviation between a normal value of an output parameter corresponding to an operation condition and an actual measurement value of the output parameter using a prediction model, and determining the presence of an abnormality if an average of the deviation exceeds a threshold. If the presence of the abnormality is determined, a factor of the abnormality is estimated based on the range of the deviation where a waveform peak of the frequency distribution exists.

ELECTRONIC CAMSHAFT MOTOR CONTROL FOR PISTON PUMP

A two (or more) piston pump system (10) is provided with both pumps (12) being crank (14) driven. The system does not have a mechanical camshaft, but a software algorithm, which acts like one in controller (20). The algorithm will LEARN and create a unique speed profile, which will mimic the mechanical camshaft. For practical purposes the speed profile of output gear is called Cam profile with software acting as an imaginary camshaft. The algorithm utilizes Crank Angle Estimation, Learn Curve Generation, Smoothing and Advance Timing Calculation.

MODULAR MULTI-CHANNEL SYRINGE PUMP

A modular multi-channel syringe pump assembly includes a chassis in which are mounted two or more parallel syringe banks. Each syringe bank includes a syringe for retaining a fluid in a chamber with a syringe plunger for drawing fluid into or forcing fluid out of the chamber. A syringe drive actuator includes a syringe drive motor and a mechanical linkage for activating the syringe. At least one position sensor detects syringe position and generates a position signal corresponding to the syringe position. A controller receives the position signal for each syringe bank and generates control signals for operation of the two or more syringe banks. 1. A multi-channel syringe pump assembly comprising:a chassis; a syringe configured for retaining a fluid in a chamber, the syringe comprising a syringe plunger configured for drawing the fluid into or forcing the fluid out of the chamber;', 'a syringe drive actuator comprising a syringe drive motor and a mechanical linkage configured for activating the syringe;', 'at least one position sensor configured for detecting and generating a position signal indicative of a position of the syringe; and, 'two or more syringe banks mounted in parallel within the chassis, each syringe bank comprisinga controller for receiving the position signal for each syringe bank and generating control signals for operation of the two or more syringe banks.2. The assembly of claim 1 , wherein the at least one position sensor comprises a linear motion sensor configured for measuring relative movement of the syringe and the syringe plunger.3. The assembly of claim 2 , wherein the linear motion sensor comprises an optical encoder disposed on the mechanical linkage of the syringe drive actuator configured for detecting gradations on an encoder tape disposed in a fixed relationship to the chassis.4. The assembly of claim 1 , wherein the at least one position sensor comprises an optical detector disposed in a fixed relationship to the chassis and ...

TWO-STAGE RECIPROCATING COMPRESSOR OPTIMIZATION CONTROL SYSTEM

According to some embodiments, system and methods are provided, comprising providing a dual-mode model for a reciprocating compressor, wherein the model includes a measurement mode and a tuning mode; receiving one or more inputs to the model from an operating reciprocating compressor; and in response to receipt of the one or more inputs, executing the model in at least one of the measurement mode and the tuning mode, wherein: in a measurement mode, execution of the model further comprises calculating an actual flow rate of gas in the compressor based on the one or more inputs; and in a tuning mode, execution of the model further comprises calculating one of an unloader setting and a speed set point of a physical element of the compressor for a given flow rate of gas. Numerous other aspects are provided. 1. A method comprising:providing a dual-mode model for a reciprocating compressor, wherein the model includes a measurement mode and a tuning mode;receiving one or more inputs to the model from an operating reciprocating compressor; and in a measurement mode, execution of the model further comprises calculating an actual flow rate of gas in the compressor based on the one or more inputs; and', 'in a tuning mode, execution of the model further comprises calculating one of an unloader setting and a speed set point of a physical element of the compressor for a given flow rate of gas., 'in response to receipt of the one or more inputs, executing the model in at least one of the measurement mode and the tuning mode, wherein2. The method of claim 1 , wherein the one or more inputs is one of suction pressure claim 1 , suction temperature claim 1 , discharge pressure and speed of a shaft.3. The method of claim 1 , further comprising:receiving cylinder parameters and an unloader setting in the dual-mode model to calculate the actual flow rate of gas.4. The method of claim 1 , further comprising:in the tuning mode, one of receiving the unloader setting to calculate the speed ...

Controller assembly for simultaneously managing multiple engine/pump assemblies to perform shared work

A pumping system includes a pump array of multiple pump-engine assemblies. Each pump-engine assembly comprises a pump and a gas turbine engine driving the pump. A manifold is coupled to the pumps. A master controller is coupled to each of the pump-engine assemblies either directly or via one or more intermediate controllers. The master controller and any intermediate controllers are collectively programmed to respond to user input including a desired hydraulic output at the manifold by automatically calculating and applying inputs to the individual pump-engine assemblies to provide the desired hydraulic output.

Multi-compatible digital engine controller

A digital engine controller compatible with multiple variants of gas turbine engine is programmed to receive identification of a variant of gas turbine engine coupled to the digital controller and thereafter to automatically determine and adjust inputs to the engine, according to the received identification of engine variant, to meet user-specified output.

Proportioning pump, control systems and applicator apparatus

An absolute proportioning pumping system includes an electric motor assembly powering a first pump at a first flow rate and powering a second pump at a second flow rate. A proportioned fluid output includes a first fluid pumped by the first pump and a second fluid pumped by the second pump. The pumping system provides a desired ratio of the first fluid to the second fluid at the proportioned fluid output, relatively independently of pressure and flow rate at the output. In accord with further embodiments, a pump and motor assembly is mounted to and generally surrounded by a liquid tank. The pump and motor assembly may include a pair of fixed ratio outputs driven from a common motor, or may include a single variable output pump either slaved to a master pump or controlled through a timed bypass valve to control output flow rate.

ELECTRONIC CAMSHAFT MOTOR CONTROL FOR PISTON PUMP

SUBSTRATE PROCESSING APPARATUS AND RECORDING MEDIUM

There is provided a technique that includes: a controller configured to execute a process recipe including a plurality of steps to perform a predetermined process on a substrate. The controller acquires device data, which includes at least one of a current value, a rotational speed, and a back pressure of a pump, in a specific step among the plurality of steps and compares an acquired value of the device data with a previously acquired value of the device data. The controller generates a notification if at least one of the following conditions is met: the acquired value for the current value is larger than the previously acquired value for the current value, the acquired value for the back pressure is larger than the previously acquired value for the back pressure, and the acquired value for the rotational speed is smaller than the previously acquired value for the rotational speed.

Hydraulically driven cooling fan responsive to engine load

A hydraulic fan drive for a cooling system of an internal combustion engine, in particular a diesel engine of a mobile working machine or a construction machine, is configured to be switched off for a short time or by way of a transition in dependence on a load of the internal combustion engine. A shut-off valve, which is arranged in a working line connecting a variable-displacement pump to a fan motor, is configured to switch off the fan drive. The fan drive is further configured to be switched off by rotational speed monitoring of the internal combustion engine.

PRESSURE PUMP CONNECTING ROD MONITORING

A system and method for the early detection of connecting rod bearing failures in pump power ends using temperature measurements is provided. The system may include a housing enclosing the pump power end, and a crankshaft, connecting rod, and crosshead all disposed within the housing, with the connecting rod coupled between the crankshaft and the crosshead. The system also includes a temperature sensor assembly at least partially disposed on the housing. The temperature sensor assembly is communicatively coupled to a controller located outside the housing, and the temperature sensor assembly is positioned such that the temperature sensor assembly detects a temperature of the connecting rod or the crosshead. A controller may read, store, and monitor temperature data received from the temperature sensor, and output an alert to an operator or shut down the pump upon detecting a temperature that exceeds a predetermined threshold.

DIAPHRAGM PUMP AND METHOD FOR CONTACTLESS ACTUATION THEREOF

Depicted and described herein is a diaphragm pump () for conveying a gaseous and/or liquid medium, having at least one deformable membrane () for changing the size of a work chamber () of the diaphragm pump (), and having at least one actuating unit () for deforming the membrane () by means of applying contact-free force to the membrane () using a magnetic field, wherein the membrane () comprises and/or consists of a material which is magnetic and/or magnetizable, and the actuating unit () features at least one magnetic and/or magnetizable actuating means (). According to the invention, the actuating unit () is rotatably mounted and the membrane () is arranged circumferentially with respect to the actuating unit (), wherein, in a dead point position of the membrane (), the polarization direction of the magnetic field generated between the material of the membrane () and the actuating means () is oriented in a direction radial to the axis of rotation of the actuating unit (). 111-. (canceled)12. A diaphragm pump for conveying a gaseous , liquid , or gaseous/liquid medium , comprising:at least one deformable membrane for changing the size of a work chamber of the diaphragm pump; andat least one actuating unit for deforming the membrane by applying contact-free force to the membrane using a magnetic field, wherein the membrane comprises or consists of a material which is magnetic or magnetizable, and the at least one actuating unit includes at least one magnetic or magnetizable actuating means.13. The diaphragm pump of claim 12 , wherein the actuating unit is rotatably mounted and the membrane is arranged circumferentially with respect to the actuating unit; andwherein, in a dead point position of the membrane, the polarization direction of the magnetic field generated between the material of the membrane and the actuating means is oriented in a direction radial to the axis of rotation of the actuating unit.14. The diaphragm pump of claim 12 , wherein an axis of ...

PIEZOELECTRIC MICROBLOWER

... [Object] To provide a piezoelectric microblower that can be made compact while still attaining good blower characteristics. [Solution] In part of a blower chamber 4 corresponding to a central portion of a vibrating plate 50, a resonance space 34 is formed by providing a partition 33 around an opening 31 and the size of the resonance space 34 is set such that the driving frequency of the vibrating plate 50 and the Helmholtz resonant frequency of the resonance space 34 correspond to each other. A gap δ is formed between the partition 33 and the vibrating plate 50 so that there is no contact therebetween when the vibrating plate is displaced. An increase in the flow rate can be attained by utilizing resonance of air.

Pressure pump connecting rod monitoring

A system and method for the early detection of connecting rod bearing failures in pump power ends using temperature measurements is provided. The system may include a housing enclosing the pump power end, and a crankshaft, connecting rod, and crosshead all disposed within the housing, with the connecting rod coupled between the crankshaft and the crosshead. The system also includes a temperature sensor assembly at least partially disposed on the housing. The temperature sensor assembly is communicatively coupled to a controller located outside the housing, and the temperature sensor assembly is positioned such that the temperature sensor assembly detects a temperature of the connecting rod or the crosshead. A controller may read, store, and monitor temperature data received from the temperature sensor, and output an alert to an operator or shut down the pump upon detecting a temperature that exceeds a predetermined threshold.

Substrate processing apparatus and recording medium

There is provided a technique that includes: a main controller configured to execute a process recipe including a plurality of steps to perform a predetermined process on a substrate so as to acquire device data when executing the process recipe; and a storage part configured to store the acquired device data, wherein the main controller is configured to: acquire the device data in a predetermined specific step among the steps constituting the process recipe; calculate a value of the acquired device data in the specific step; compare the calculated value with a value of the device data in the specific step calculated at a time of previous execution of the process recipe; and generate an alarm when the calculated value shows a predefined tendency.

Disposable cassette with negative head height fluid supply and method

A fluid infusion pump includes a disposable cassette having an inlet, an outlet, and a fluid chamber between the inlet and the outlet. There is a fixed wall of the fluid chamber and a movable wall of the fluid chamber. A pump body receives the cassette in a fixed operating relationship such that an actuator in the pump body is activatable for reciprocal advancement and retraction with respect to the cassette and is adapted to confront the movable diaphragm when the cassette is received in the pump body. There is a detachable coupling between the actuator mounted in the pump body and the movable wall so that fluid is expelled from the fluid chamber on advancement of the actuator and positively drawn into the fluid chamber upon retraction of the actuator.

METHOD AND SYSTEM FOR DIAGNOSING ABNORMALITY OF HYDRAULIC DEVICE

An abnormality diagnosis method is targeted at a hydraulic device which includes a hydraulic pump and a driven device driven by the hydraulic pump. The method includes calculating a frequency distribution with regard to a deviation between a normal value of an output parameter corresponding to an operation condition and an actual measurement value of the output parameter using a prediction model, and determining the presence of an abnormality if an average of the deviation exceeds a threshold. If the presence of the abnormality is determined, a factor of the abnormality is estimated based on the range of the deviation where a waveform peak of the frequency distribution exists. 1. An abnormality diagnosis method for a hydraulic device which includes a hydraulic pump and a driven device driven by the hydraulic pump , the method comprising:a step of generating a prediction model capable of predicting a normal value of an output parameter of the hydraulic device for each operation condition of the hydraulic device;a step of obtaining an operation condition of the hydraulic pump;a step of calculating the normal value of the output parameter corresponding to the operation condition using the prediction model;a step of obtaining an actual measurement value of the output parameter with respect to the hydraulic pump;a step of calculating a frequency distribution with regard to a deviation between the normal value and the actual measurement value;a step of calculating an average of the deviation based on the frequency distribution, and determining that the hydraulic device has an abnormality if the average exceeds a threshold; anda step of estimating a factor of the abnormality based on a range of the deviation where a waveform peak of the frequency distribution exists, if it is determined that the hydraulic device has the abnormality.2. The abnormality diagnosis method for the hydraulic device according to claim 1 ,wherein the step of estimating the factor includes: ...

Motor passive direction indicator and reversal alarm

A method and apparatus for preventing accidental manual rotor reversal in a peristaltic pump is provided. A peristaltic pump may be provided with a hand crank or the like to drive a rotor assembly of the pump manually in the event of failure of the electric motor drive of the pump. An indicator may provide information to the pump operator to inform the operator of the direction in which the pump was rotating when last driven by the electric motor. Further an alarm device may alert the operator when the operator is attempting to rotate the pump in the direction opposite the direction in which the pump was rotating when last driven by the electric motor or the direction last selected by the operator before loss of power.

Disposable cassette with negative head height fluid supply

A fluid infusion pump includes a disposable cassette having an inlet, an outlet, and a fluid chamber between the inlet and the outlet. There is a fixed wall of the fluid chamber and a movable wall of the fluid chamber. A pump body receives the cassette in a fixed operating relationship such that an actuator in the pump body is activatable for reciprocal advancement and retraction with respect to the cassette and is adapted to confront the movable diaphragm when the cassette is received in the pump body. There is a detachable coupling between the actuator mounted in the pump body and the movable wall so that fluid is expelled from the fluid chamber on advancement of the actuator and positively drawn into the fluid chamber upon retraction of the actuator.

AUTOMATIC SELF-DRIVING PUMPS

An automatic self-driving pump system features a pump/motor/drive detector and an automatic self-driving and control design/setup module. In operation, the pump/motor/drive detector receives sensed signaling containing information about a pump/drive for operating in a hydronic pump system, e.g., stored in and sensed from a signature chip or barcode installed that can be scanned by a scanner, and provides corresponding database signaling containing information about parameters for providing automatic pump control design, setup and run to control the pump/drive for operating in the hydronic pump system, based upon the sensed signaling received. The automatic self-driving and control design/setup module receives the corresponding database signaling, and provides control signaling containing information for providing the automatic pump control design, setup and run to control the pump/drive for operating in the hydronic pump system, based upon the corresponding database signaling received.

Crankcase pressure control for swash plate compressor

An object of the present invention is to provide a multi-cylinder rotary compressor which can eliminate a number of balancers for preventing vibrations. Assuming that the mass eccentricity in a cylinder is m1 × r1; the mass eccentricity in another cylinder is m2 × r2; the mass eccentricity of a balancer attached to the lower side of a rotator is m3 × r3; the mass eccentricity of another balancer attached to the upper side of the rotator is m4 × r4; respective distances from the cylinder to another cylinder, the lower balancer and another balancer are L2, L3 and L4, when the balancing is attained with the expressions m1 × r1 + m4 × r4 = m2 × r2 + m3 × r3, m4 × r4 × L4 = m2 × r2 × L2 + m3 × r3 × L3, and m1 × r1 = m2 × r2, the lower balancer is eliminated and the mass eccentricity of the balancer is set to be not less than 20% and not more than 80% of m4 × r4.

SUBSTRATE PROCESSING APPARATUS AND RECORDING MEDIUM

There is provided a technique that includes: a main controller configured to execute a process recipe including a plurality of steps to perform a predetermined process on a substrate so as to acquire device data when executing the process recipe; and a storage part configured to store the acquired device data, wherein the main controller is configured to: acquire the device data in a predetermined specific step among the steps constituting the process recipe; calculate a value of the acquired device data in the specific step; compare the calculated value with a value of the device data in the specific step calculated at a time of previous execution of the process recipe; and generate an alarm when the calculated value shows a predefined tendency. 1. A substrate processing apparatus comprising:a main controller configured to execute a process recipe including a plurality of steps to perform a predetermined process on a substrate so as to acquire device data when executing the process recipe; anda storage part configured to store the acquired device data, acquire the device data in a predetermined specific step among the steps constituting the process recipe;', 'calculate a value of the acquired device data in the specific step;', 'compare the calculated value with a value of the device data in the specific step calculated at a time of previous execution of the process recipe; and', 'generate an alarm when the calculated value shows a predefined tendency., 'wherein the main controller is configured to2. The substrate processing apparatus of claim 1 , wherein the storage part is configured to store a cleaning recipe for directly supplying a cleaning gas to an exhaust pipe by passing the cleaning gas by a process chamber for processing the substrate claim 1 , andwherein the main controller is configured to execute the cleaning recipe while generating the alarm.3. The substrate processing apparatus of claim 2 , wherein the main controller is configured to execute the ...

Modular multi-channel syringe pump

A modular multi-channel syringe pump assembly includes a chassis in which are mounted two or more parallel syringe banks. Each syringe bank includes a syringe for retaining a fluid in a chamber with a syringe plunger for drawing fluid into or forcing fluid out of the chamber. A syringe drive actuator includes a syringe drive motor and a mechanical linkage for activating the syringe. At least one position sensor detects syringe position and generates a position signal corresponding to the syringe position. A controller receives the position signal for each syringe bank and generates control signals for operation of the two or more syringe banks.

Motor passive direction indicator and reversal alarm

A method and apparatus for preventing accidental manual rotor reversal in a peristaltic pump is provided. A peristaltic pump may be provided with a hand crank or the like to drive a rotor assembly of the pump manually in the event of failure of the electric motor drive of the pump. An indicator may provide information to the pump operator to inform the operator of the direction in which the pump was rotating when last driven by the electric motor. Further an alarm device may alert the operator when the operator is attempting to rotate the pump in the direction opposite the direction in which the pump was rotating when last driven by the electric motor or the direction last selected by the operator before loss of power.

Electronic camshaft motor control for piston pump

Multiple-Pump Valve Monitoring System

A monitoring system may include strain gauges and position sensors corresponding to multiple pressure pumps. The strain gauge for each pressure pump may measure the strain in a respective chamber of each pump. The position sensor for each pump may measure the position of a rotating member of each pump. The monitoring system may also include one or more computing devices for determining actuation delays associated with valves corresponding to the respective chamber of each pump using expected actuation points and actual actuation points of the valves. The computing devices may compare the actuation points for the valves of all of the pressure pumps to determine a condition of a valve in one of the pressure pumps. 1. A monitoring system , comprising:a plurality of strain gauges positionable on a plurality of pressure pumps, each strain gauge of the plurality of strain gauges being positionable on a respective pressure pump of the plurality of pressure pumps to measure strain in a respective chamber of the respective pressure pump;a plurality of position sensors positionable on the plurality of pressure pumps, each position sensor of the plurality of position sensors being positionable on the respective pressure pump of the plurality of pressure pumps to sense a position of a rotating member of a rotating assembly that is mechanically coupled to a displacement member for the respective chamber of the respective pressure pump;one or more computing devices communicatively couplable to one or more pressure pumps of the plurality of pressure pumps to determine actuation delays associated with a plurality of valves located in the plurality of pressure pumps using an expected actuation points and an actual actuation points of the plurality of valves and to compare the actuation delays from each valve of the plurality of valves to determine a condition of a valve of the plurality of valves, wherein each valve of the plurality of valves is located in a separate pressure pump ...

ELECTRONIC CAMSHAFT MOTOR CONTROL FOR PISTON PUMP

A two (or more) piston pump system (10) is provided with both pumps (12) being crank (14) driven. The system does not have a mechanical camshaft, but a software algorithm, which acts like one in controller (20). The algorithm will LEARN and create a unique speed profile, which will mimic the mechanical camshaft. For practical purposes the speed profile of output gear is called Cam profile with software acting as an imaginary camshaft. The algorithm utilizes Crank Angle Estimation, Learn Curve Generation, Smoothing and Advance Timing Calculation.

Plunger pump

CONTROLE ELETRÔNICO DE MOTOR DE EIXO DE CAMES PARA BOMBA DE ÊMBOLO

Electronic camshaft motor control for piston pump

A two (or more) piston pump system (10) is provided with both pumps (12) being crank (14) driven. The system does not have a mechanical camshaft, but a software algorithm, which acts like one in controller (20). The algorithm will LEARN and create a unique speed profile, which will mimic the mechanical camshaft. For practical purposes the speed profile of output gear is called Cam profile with software acting as an imaginary camshaft. The algorithm utilizes Crank Angle Estimation, Leam Curve Generation, Smoothing and Advance Timing Calculation ...

Substrate processing apparatus, semiconductor device manufacturing method thereof, and recording medium

METHOD AND SYSTEM FOR MONITORING A REMOTE SYSTEM

This disclosure relates to methods and apparatus for monitoring a remote system. In one arrangement, a plurality of measurement data units are obtained. Each measurement data unit represents a time series of measurements made by a sensor system at the remote system. A first trained machine learning model is used to identify a subset of the measurement data units that have a higher average probability of corresponding to an abnormal state of the remote system than the other measurement data units. Data representing the identified measurement data units is sent over a communications network to a central data processing system. An abnormal state of the remote system is detected by using a second trained machine learning model at the central data processing system to process the data representing the identified measurement data units.

Proportioning pump, control systems and applicator apparatus

An absolute proportioning pumping system includes an electric motor assembly powering a first pump at a first flow rate and powering a second pump at a second flow rate. A proportioned fluid output includes a first fluid pumped by the first pump and a second fluid pumped by the second pump. The pumping system provides a desired ratio of the first fluid to the second fluid at the proportioned fluid output, relatively independently of pressure and flow rate at the output. In accord with further embodiments, a pump and motor assembly is mounted to and generally surrounded by a liquid tank. The pump and motor assembly may include a pair of fixed ratio outputs driven from a common motor, or may include a single variable output pump either slaved to a master pump or controlled through a timed bypass valve to control output flow rate.

Two-stage reciprocating compressor optimization control system

According to some embodiments, system and methods are provided, comprising providing a dual-mode model for a reciprocating compressor, wherein the model includes a measurement mode and a tuning mode; receiving one or more inputs to the model from an operating reciprocating compressor; and in response to receipt of the one or more inputs, executing the model in at least one of the measurement mode and the tuning mode, wherein: in a measurement mode, execution of the model further comprises calculating an actual flow rate of gas in the compressor based on the one or more inputs; and in a tuning mode, execution of the model further comprises calculating one of an unloader setting and a speed set point of a physical element of the compressor for a given flow rate of gas. Numerous other aspects are provided.

Refrigeration Cycle

Provided is a refrigeration cycle suitable for an air conditioning system for vehicles, wherein a flow rate of refrigerant which is used to estimate a torque of a compressor can be precisely estimated by accurately detecting a difference between pressures at upstream and downstream sides of an orifice having a high correlation with the refrigerant flow rate, and ultimately, the torque of the compressor can be precisely estimated, and the estimation can be achieved while achieving space saving and cost down. Disclosed is a refrigeration cycle which has a subcool condenser integrally provided with a condensing part for refrigerant, a liquid receiver and a subcooling part, and wherein an orifice for throttling the flow of refrigerant which has passed through the condensing part of the subcool condenser is disposed, a pressure difference detection means capable of detecting a difference between pressures at upstream and downstream sides of the orifice is provided, and provided are a refrigerant flow rate estimation means for estimating a flow rate of the refrigerant with reference to the detected pressure difference and a compressor torque estimation means for estimating a torque of the compressor with reference to the estimated flow rate of the refrigerant.

System and method for driving a pump

A system for driving a pump includes a gas turbine engine having an output shaft, and a torque converter including an input shaft coupled to the output shaft of the gas turbine engine and an output shaft configured to be coupled to an input shaft of a pump. The system further includes a controller coupled to the torque converter, wherein the controller is configured to receive a signal indicative of a pressure at at least one of a pump inlet and a pump outlet, and control a speed of the output shaft of the torque converter based on the signal indicative of pressure.

System and method for determination of polished rod position for reciprocating rod pumps

A system and method for measurement of a polished rod movement in a reciprocating rod pumping system comprising reciprocal motive elements is provided. A proximity sensor target is mounted on the polished rod while a corresponding sensor element, is mounted in fixed relation to the pumping system, for example in fixed relation to the wellhead or ground. The sensor detects passage of the proximity sensor target, and thus the polished rod, as it moves in opposite directions during a single stroke cycle. The time of passage and the speed of the polished rod, as determined from its kinematic relationship with other pumping system components, is used to determine the position of the polished rod at any point during the cycle. The proximity sensor target may be mounted on a walking beam or other reciprocally moving element, with the sensor positioned in a corresponding fixed location.

Hydraulic transport device and electrohydraulic control module

A hydraulic transport device for transporting a hydraulic medium. The device includes at least one externally toothed gear pump that is driven by an electric motor, and a control device attached to the pump. A passive rotational speed detection element is arranged in the pump and interacts with an active rotational speed detection element that is arranged in the control device to detect the rotational speed of the pump shaft.

Peristaltic pump assemblies and systems incorporating such pump assemblies

Peristaltic pump assemblies in which the closing and opening of a pivoting or sliding door is coordinated with movement of the occlusion bed toward and away from the rotor assembly to engage and disengage tubing within the occlusion pathway are disclosed. Linkage mechanisms provided by the interaction of cam surfaces with rollers, as well as bar linkage mechanisms, are disclosed. The linkage mechanism, in addition to providing precise displacement of the occlusion bed, may also provide an over-center feature that enhances safety and pump operation when the door is in a closed position. Latching mechanisms and sensors may be incorporated. Adaptive components such as tubing cassettes routing aspiration and/or infusion tubing in a predetermined configuration to mate with occlusion pathways in aspiration and/or infusion pump assemblies provided in various types of medical devices and control consoles are also provided.

Feed water pump control device

The presence or absence of boost pressure is determined from an error between F-P characteristics showing the relationship between the output frequency of an inverter and the power consumption and an actual operating point. When there is boost pressure, an amount of correction of linearized characteristics showing the relationship between quantity and discharge side pressure is automatically calculated based on the error, and the linearized characteristics are corrected. Subsequently, by carrying out a PID control in accordance with a target pressure obtained from post-correction linearized characteristics, the output frequency of an inverter unit is controlled, and an estimated constant end pressure control is carried out. Because of this, a pressure sensor or quantity sensor on a pump intake side is rendered unnecessary, and a simplification and reduction in cost of a feed water pump control device are possible.

ELECTRIC MOTOR CONTROL FOR PUMPJACK PUMPING

A pumpjack is driven by an electric motor coupled to a gear box. A local drive controller controls the motor in accordance with a varying motor speed profile over a pumping cycle of the pumpjack. The drive controller determines, based on sensory feedback from the one or more sensors, a pumping cycle load profile, automatically determines, based on the pumping cycle load profile, a varying voltage profile, and controls the motor in accordance with the varying motor speed profile while applying the varying voltage profile to the motor. 1. A pumpjack motor system , comprising:an electric motor coupled to a gear box of a pumpjack;one or more sensors mounted to monitor at least one operating condition of the pumpjack during operation of the motor; anda drive controller coupled to the motor and operable to control the motor in accordance with a varying motor speed profile over a pumping cycle of the pumpjack, while applying voltage to the motor; determine, based on sensory feedback from the one or more sensors, a pumping cycle load profile;', 'automatically determine, based on the pumping cycle load profile, a varying voltage profile; and to', 'control the motor in accordance with the varying motor speed profile while applying the varying voltage profile to the motor., 'wherein the drive controller is configured to'}2. The pumpjack motor system of claim 1 , wherein the varying motor speed profile comprises an altered version of a stroke timing curve implemented during one or more previous pumping cycles of the pumpjack.3. The pumpjack motor system of claim 1 , wherein the varying motor speed profile comprises a plurality of target motor speeds corresponding to each of a plurality of discrete control periods within the pumping cycle of the pump jack.4. The pumpjack motor system of claim 3 , wherein the pumping cycle load profile comprises a plurality of torque loads corresponding to each of the plurality of discrete control periods.5. The pumpjack motor system of claim 3 , ...

DIAGNOSTICS OF DOWNHOLE DYNAMOMETER DATA FOR CONTROL AND TROUBLESHOOTING OF RECIPROCATING ROD LIFT SYSTEMS

Techniques and apparatus are provided for improved diagnostics of downhole dynamometer data for control and troubleshooting of reciprocating rod lift systems. A method for pump fillage determination for a reciprocating rod lift system is provided. The method generally includes measuring downhole data during a pump cycle, wherein the downhole data comprises a first plurality of data points associated with an upstroke of the pump cycle and a second plurality of data points associated with a downstroke of the pump cycle, each data point comprising a rod position value and an associated rod load value; converting the data points to non-dimensional data points, calculating non-dimensional slope values between non-dimensional data points; and determining pump fillage based, at least part, on the calculated non-dimensional slope values. 1. A method for pump fillage determination for a reciprocating rod lift system , comprising:measuring downhole data during a pump cycle, wherein the downhole data comprises of a first plurality of data points associated with an upstroke of the pump cycle and a second plurality of data points associated with a downstroke of the pump cycle, each data point comprising a rod position value and an associated rod load value;converting the data points to non-dimensional data points;calculating non-dimensional slope values between non-dimensional data points; anddetermining pump fillage based, at least part, on the calculated non-dimensional slope values.2. The method of claim 1 , wherein converting the data points to non-dimensional data points comprises claim 1 , for each data point:dividing the rod position value by a maximum rod position span; anddividing the rod load value by a maximum rod load span.3. The method of claim 3 , wherein the calculating comprises:subtracting a rod position value associated with a first data point from a rod position value associated with a second data point to obtain a position difference value;subtracting a rod ...

Piston Compressor with a Closing Device for the Outlet Line

A piston compressor for compressing a gas, which optionally can be disconnected from a drive device by a clutch, has an inlet valve, which is arranged between an inlet line for gas to be compressed and a compression chamber of the piston compressor, and an outlet valve, which is arranged between the compression chamber of the piston compressor and an outlet line for compressed gas. The piston compressor includes a closing device which closes the outlet line with respect to the compression chamber.

DIAGNOSTICS OF DOWNHOLE DYNAMOMETER DATA FOR CONTROL AND TROUBLESHOOTING OF RECIPROCATING ROD LIFT SYSTEMS

Techniques and apparatus are provided for improved diagnostics of downhole dynamometer data for control and troubleshooting of reciprocating rod lift systems. A method for pump fillage determination for a reciprocating rod lift system is provided. The method generally includes measuring downhole data during a pump cycle, wherein the downhole data comprises a first plurality of data points associated with an upstroke of the pump cycle and a second plurality of data points associated with a downstroke of the pump cycle, each data point comprising a rod position value and an associated rod load value; converting the data points to non-dimensional data points, calculating non-dimensional slope values between non-dimensional data points; and determining pump fillage based, at least part, on the calculated non-dimensional slope values. 1. A reciprocating rod lift system , comprising: a pump barrel;', 'a plunger;', 'a standing valve; and', 'a traveling valve; and, 'a pump comprising measure downhole data during a pump cycle, wherein the downhole data comprises a first plurality of data points associated with an upstroke of the pump cycle and a second plurality of data points associated with a downstroke of the pump cycle, each data point comprising a rod position value and an associated rod load value;', 'convert the data points to non-dimensional data points;', 'calculate non-dimensional slope values between non-dimensional data points; and', 'determine pump fillage based, at least in part, on the calculated non-dimensional slope values., 'a control unit for controlling the pump, wherein the control unit is configured to2. The reciprocating rod lift system of claim 1 , wherein the control unit is configured to:calculate the non-dimensional slope values between each pair of adjacent non-dimensional data points; anddetermine at least one parameter of the reciprocating rod lift system based on the calculated non-dimensional slope values, wherein the at least one parameter ...

SWASH PLATE ANGLE SENSOR

The invention is directed to a swashplate angle sensor () for a variable displacement hydraulic unit (). The hydraulic unit () comprising a housing (), within which a swashplate () with a rod shaped feedback-link () fixedly attached to the swashplate () is arranged pivotable around a swashplate axis (). The angle sensor () comprising a magnet () mounted rotatable on a magnet carrier (), and a sensor () for sensing the orientation of the magnet (). The magnet carrier () is located in a control block () attached to the housing () and is located parallel to the feedback-link (). The magnet carrier () is rotatable around a sensor axis () being parallel to the swashplate axis (). A linkage spring () provides a connection between the feedback-link () and the magnet carrier () such that a pivoting of the swashplate () with the feedback-link () causes a rotation of the magnet carrier (). 1. A swashplate angle sensor for a variable displacement hydraulic unit comprising a pivot-able swashplate with a rod shaped feedback-link attached thereon , the angle sensor comprising a magnet mounted on a magnet carrier rotatable around a sensor axis , and a sensor for sensing the orientation of the magnet , whereinthe angle sensor comprises a linkage element providing a mechanical linkage between the feedback-link and the magnet carrier such that a pivoting of the swashplate moves the linkage element via the feedback-link and causes a rotation of the magnet carrier.2. The swashplate angle sensor of claim 1 , wherein the linkage element comprises a spring with a U-shaped elongated hole-section surrounding the feedback-link in a tight slide-able contact therewith claim 1 , and with two legs claim 1 , the ends of which are coupled to the magnet carrier.3. The swashplate angle sensor of claim 1 , wherein the linkage element comprises an elongated hole-section surrounding the feedback-link in a tight slide-able contact therewith claim 1 , and an adjoining leg claim 1 , the end of which is ...

GAS COMPRESSOR AND SYSTEM AND METHOD FOR GAS COMPRESSING

Methods and systems are provided to adaptively control a hydraulic fluid supply to supply a driving fluid for applying a driving force on a piston in a gas compressor, the driving force being cyclically reversed between a first direction and a second direction to cause the piston to reciprocate in strokes. During a first stroke of the piston, a speed of the piston, a temperature of the driving fluid, and a load pressure applied to the piston is monitored. Reversal of the driving force after the first stroke is controlled based on the speed, load pressure, and temperature. 1. A control system for adaptively controlling a hydraulic fluid supply to supply a driving fluid for applying a driving force on a piston in a gas compressor , the driving force being cyclically reversed between a first direction and a second direction to cause the piston to reciprocate in strokes , the system comprising:{'b': 1', '2', '1', '2, 'first and second proximity sensors positioned and configured to respectively generate a first signal indicative of a first time (T) when a first part of the piston is in proximity of the first proximity sensor, and a second signal indicative of a second time (T) when a second part of the piston is in a proximity of the second proximity sensor, whereby a speed of the piston during a first stroke of the piston is calculable based on T, T and a distance between the first and second proximity sensors;'}one or more pressure sensors positioned and configured to generate a signal indicative of a load pressure applied on the piston;a temperature sensor positioned and configured to generate a signal indicative of a temperature of the driving fluid; anda controller configured to receive signals from said sensors and for controlling the hydraulic fluid supply to control reversal of the driving force based on the speed of the piston, the temperature of the driving fluid, and the load pressure applied to the piston during the first stroke.22. The system of claim 1 , ...

Critical Valve Performance Monitoring System

A monitoring system can include a position sensor coupled to a pump to sense a position of a rotating assembly member of the pump and generate an associated position signal. The position signal can be used to determine a position of a displacement member in a chamber in a fluid end of the pump. The monitoring system can include a strain gauge to measure strain in the chamber and generate an associated strain signal. The strain signal can be used to determine an actuation point for a valve in the chamber. A computing device can determine an actuation delay of the valve by correlating the position of the displacement member in the chamber with the actuation point for the valve. The actuation delay can represent the actuation point relative to the position of the displacement member during operation of the pump. 1. A monitoring system for use in a pump , the monitoring system comprising:a position sensor positionable on a power end of the pump to sense a position of a rotating assembly member of the pump and generate a position signal representing the position of the rotating assembly member during operation of the pump, the position signal being usable in determining a position of a displacement member in a chamber in a fluid end of the pump;a strain gauge positionable on the chamber to measure strain in the chamber and generate a strain signal representing the strain in the chamber, the strain signal being usable for determining an actuation point for a valve in the chamber; anda computing device couplable to the position sensor and the strain gauge, the computing device being configured to determine an actuation delay of the valve by correlating the position of the displacement member in the chamber with the actuation point for the valve, the actuation delay representing the actuation point relative to the position of the displacement member during operation of the pump.2. The monitoring system of claim 1 , wherein the strain gauge is positioned on an external ...

RIG MANAGEMENT SYSTEM FOR TRANSMISSION CONTROL OF A HYDRAULIC FRACTURING RIG

A rig management system is disclosed. The rig management system may be configured to receive information to be used to control shifting of a transmission to prevent cavitation during use of the hydraulic fracturing rig. The rig management system may be configured to determine a flow rate for a pump based on the information. The rig management system may be configured to determine an output torque of the transmission based on the flow rate. The rig management system may be configured to determine a transmission gear for the transmission based on the output torque and a fuel consumption map, wherein the fuel consumption map identifies a respective fuel consumption rate for different combinations of transmission gears and output torques. The rig management system may be configured to cause the transmission to shift into the transmission gear after determining the transmission gear. 1. A method , comprising: an inlet pressure to be used for a hydraulic fracturing rig,', 'one or more fluid properties of a fluid to be used in association with the hydraulic fracturing rig,', 'a flow rate to be used in association with the hydraulic fracturing rig, or', 'an indication of a possible cavitation associated with use of the hydraulic fracturing rig;, 'receiving, by a device, information that identifies at least one ofdetermining, by the device, a modified flow rate to be used in association with the hydraulic fracturing rig based on the information;determining, by the device, an output torque to be output by a transmission of the hydraulic fracturing rig based on the modified flow rate; 'wherein the fuel consumption map identifies a respective fuel consumption rate for different combinations of transmission gears and output torques; and', 'determining, by the device, a transmission gear for the transmission based on the output torque and a fuel consumption map,'}causing, by the device, the transmission to shift into the transmission gear after determining the transmission gear.2 ...

Measuring Backlash of a Pump Gear Train

Apparatus and methods for measuring backlash of a gear train of a pump unit for pumping a fluid. An example method may include locking a crankshaft of the pump unit such that the crankshaft cannot rotate. The method may further include commencing operation of a processing device to receive rotational position measurements indicative of rotational position of an output shaft of a prime mover, cause the prime mover to rotate the output shaft in a first direction until the output shaft reaches a first rotational position, and cause the prime mover to rotate the output shaft in a second direction until the output shaft reaches a second rotational position. The processing device may then determine backlash of the gear train by determining rotational distance between the first rotational position of the output shaft and the second rotational position of the output shaft. 1. An apparatus comprising: a rotational position sensor operable to facilitate rotational position measurements indicative of a rotational position of the output shaft;', 'a locking device operable to mechanically engage the crankshaft such that the crankshaft cannot rotate; and', causing the prime mover to rotate the output shaft in a first direction until the output shaft reaches a first rotational position at which the output shaft cannot further rotate;', 'causing the prime mover to rotate the output shaft in a second direction until the output shaft reaches a second rotational position at which the output shaft cannot further rotate;', 'recording the rotational position measurements while the prime mover rotates the output shaft in the second direction from the first rotational position to the second rotational position; and', 'determining backlash of the gear train by determining rotational distance between the first rotational position of the output shaft and the second rotational position of the output shaft based on the recorded rotational position measurements., 'a processing device comprising ...

Accurate flow-in measurement by triplex pump and continuous verification

A method includes determining a rotational position of a crankshaft in a multiplex pump from one or more sensors disposed on the crankshaft, determining a position of each of a plurality of pistons along a corresponding pump bore in relation to a total stroke length of each piston and a connecting rod length, calculating an individual theoretical displaced volume of fluid for each of the pump bores in the multiplex pump based on the rotational position of the crankshaft, and summing the individual theoretical displaced volumes to determine a total theoretical pumped volume by the multiplex pump. A calibration method includes determination of the multiplex pump efficiency versus speed and discharge pressure, and the effect of pump leakage and valve closing delay on the pump efficiency. Verification of the pump performance and efficiency may be controlled during pumping to insure the validity of the last calibration data set.

LIQUID COLOR CLOSED LOOP REFILL METHOD AND APPARATUS

Method and apparatus for furnishing process machines with liquid color from a supply thereof provides a loop conduit having respective ends receiving liquid color from the supply and discharging liquid color back into the supply, pumping liquid color through the loop conduit and discharging liquid color from the loop conduit at an intermediate position into a reservoir associated with a process machine upon liquid color level in the reservoir being at a low level limit. 1. A method for furnishing a plurality of process machines with liquid color from a supply thereof , comprising:a. providing a loop conduit having outbound and inbound segments with respective ends receiving liquid color from the supply and discharging liquid color back into the supply;b. continuously pumping liquid color through the loop conduit;c. providing a plurality of liquid color discharge positions in the outbound segment;d. discharging liquid color from the loop conduit at one of the liquid color discharge positions on the outboard segment into a respective reservoir connected by a supply conduit to a respective process machine upon liquid color level in the respective reservoir being at a gravimetrically determined low level limit or upon a detector connected to the respective process machine signaling the need for liquid color by the machine.2. The method of further comprising intermittently mixing liquid color in the supply.3. The method of further comprising continuously mixing liquid color in the supply.4. The method of further comprising increasing pumping speed whenever liquid color is being discharged from the loop conduit into the reservoir.5. The method of further comprising discharging liquid color from the loop conduit by actuating a valve.6. The method of further comprising sensing weight of the reservoir and upon sensed weight falling below a preselected value claim 5 , actuating the valve to discharge liquid color from the conduit to replenish the reservoir.7. The method of ...

Flow Locking System and Method

Embodiments of the invention provide a pumping system and method including a flow locking feature. A pump controller includes a user interface configured to initially receive and set a plurality of programmed flow rate settings, a maximum locked flow rate, and a minimum locked flow rate. The pump controller is also configured to disable resetting of the maximum flow rate and the minimum flow rate once they are initially received and set and to allow resetting of the plurality of programmed flow rate settings throughout operation of the pumping system. The pump controller is further configured to operate a pump motor in order to maintain a first flow rate set by one of the plurality of programmed flow rate settings as long as the first flow rate is between the minimum locked flow rate and the maximum locked flow rate. 1. A pumping system for at least one aquatic application , the pumping system comprising:a pump;a motor coupled to the pump; and the pump controller including a user interface configured to initially receive and set a maximum locked flow rate, a minimum locked flow rate, and a plurality of programmed speed settings including a first programmed speed setting,', 'the pump controller configured to disable resetting of the maximum flow rate and the minimum flow rate once they are initially received and set through the user interface,', 'the pump controller configured to allow resetting of the plurality of programmed speed settings throughout operation of the pumping system,', 'the pump controller configured to operate the motor at a first speed set by the first programmed speed setting as long as operating the motor at the first speed maintains a flow rate through the pumping system that is between the minimum locked flow rate and the maximum locked flow rate., 'a pump controller in communication with the motor,'}2. The pumping system of wherein the pump controller is configured to operate the motor at an adjusted speed if operating the motor at the first ...

HYDRAULIC FRACTURING PUMP CONTROL SYSTEM

A monitor and control system for a hydraulic fracturing pump is described herein to reduce or eliminate harmful oscillations in fluid discharge pressure caused by the pump load dynamics. The monitor and control system receives various sensor data from the operation of the pump, including the pump crank position, and executes a pump control equation or model based on the pump sensor data, pump load data and/or pump speed data. Pump control equations or models are specific to the design and dynamic operation of the pump, incorporating the number of plungers, pump dynamics, motor lag and motor dynamics, etc. Using the pump control equations or models, the monitor and control system determines control commands for the pump motor to reduce or eliminate the oscillatory discharge pressure at the pump. 1. A motor control system associated with a hydraulic fracturing pump , comprising:a pump crank position sensor;one or more central processing units (CPUs); and{'claim-text': ['transmitting a first control command to a motor associated with the hydraulic fracturing pump;', 'receiving crank position data from the pump crank position sensor, the crank position data indicating an orientation of a crankshaft of the hydraulic fracturing pump at a first time during the operation of the motor;', 'determining load data associated with the hydraulic fracturing pump as the motor operates in accordance with the first control command;', 'determining a second control command for the motor associated with the hydraulic fracturing pump, based at least in part on the crank position data, and the load data associated with the hydraulic fracturing pump; and', 'transmitting the second control command to the motor associated with the hydraulic fracturing pump.'], '#text': 'memory storing executable instructions that, when executed by the one or more CPUs, cause the CPUs to perform operations comprising:'}2. The motor control system of claim 1 , the operations further comprising:determining a ...

CONTROL DEVICE AND METHOD FOR OPERATING A REFRIGERANT COMPRESSOR

Electronic control device for a refrigerant compressor, comprising at least one drive unit and a compression mechanism which is in operative connection with the drive unit and has at least one piston which, in an operating state of the refrigerant compressor, moves back and forth in a cylinder of a cylinder block of the refrigerant compressor for the operational compression of refrigerant and is driven by a crankshaft of the drive unit, wherein the electronic control device of the refrigerant compressor is at least designed to detect at least one physical process parameter, preferably the rotational speed (n) of the crankshaft or the power consumption of the refrigerant compressor, and to detect a switch-off signal directed at the refrigerant compressor, said switch-off signal terminating a refrigerant compressor operating phase in which the refrigerant compressor is operated as intended with a positive operating torque; and is also designed to regulate a torque applied by the drive unit to the crankshaft so as to adjust the rotational speed (n) of the crankshaft, wherein the electronic control device is further designed to apply a braking torque to the crankshaft immediately after detecting the switch-off signal, wherein the braking torque is applied in the opposite direction to the positive torque acting during the operating phase and the value of this braking torque is a function of the detected physical process parameter, preferably the rotational speed (n) of the crankshaft or the power consumption of the refrigerant compressor. 2. The electronic control device as in claim 1 , wherein the physical process parameter is the rotary speed (n) of the crankshaft.3. The electronic control device as in claim 1 , wherein the value of the braking torque applied to the crankshaft immediately after detection of the shutoff signal is inversely proportional to the rotary speed (n) of the crankshaft that the crankshaft has at the moment of the detection of the shutoff signal. ...

System and Method for Comprehensive Fracturing Pump Operation Monitoring

A system for monitoring a hydraulic fracturing pump includes a first sensor configured to measure a discharge fluid pressure of the pump, a second sensor configured to sense a displacement of a crankshaft of the pump, a processor communicatively coupled to the first and second sensors and configured to analyze the sensor data and determine a cycle count, duty cycle, and operating hour value for the positive displacement pump, and a display coupled to the processor configured to display the cycle count, duty cycle, and operating hour value. 1. A system for monitoring a hydraulic fracturing pump , comprising:a first sensor configured to measure a discharge fluid pressure of the pump;a second sensor configured to sense a displacement of a crankshaft of the pump;a processor communicatively coupled to the first and second sensors and configured to analyze the sensor data and determine a cycle count, duty cycle, and operating hour value for the pump; anda display coupled to the processor configured to display the cycle count, duty cycle, and operating hour value.2. The system of claim 1 , wherein the processor is configured to determine a number of operating hours that the pump is operating at a speed equal or above a predetermined threshold.3. The system of claim 1 , wherein the processor is configured to determine the number of hours the pump is operating within certain fluid discharge pressure ranges.4. The system of claim 1 , wherein the processor is configured to determine the number of cycles the pump is operating within certain fluid discharge pressure ranges.5. The system of claim 1 , wherein the first and second sensor is selected from the group consisting of pressure transducer claim 1 , strain gauge claim 1 , pressure sensor claim 1 , accelerometer claim 1 , vibration sensor claim 1 , piezoelectric element claim 1 , proximity sensor claim 1 , linear variable displacement transducer claim 1 , load cell claim 1 , and flow meter.6. The system of claim 1 , further ...

Reciprocating compressor flow sensing

Systems, methods, and non-transitory media for monitoring a reciprocating compressor determining a valve opening of a valve disposed in the reciprocating compressor using a sensor and determining a first location of a piston of the reciprocating compressor at the valve opening. The monitoring also includes determining a valve closing of the valve using the sensor and determining a second location of the piston at the valve closing. Furthermore, the monitoring includes estimating a volumetric efficiency based at least in part on the first and second location.

APPARATUS TO PREVENT SIDE LOAD IN HYDRAULIC OVERRIDE PUMPS

Apparatus that prevent side load in hydraulic override pumps are disclosed herein. An example apparatus includes a lever rotatably mounted to a support, a pump cylinder rotatable about a first end of the pump cylinder, and a pump rod operatively coupled to the lever to move within the pump cylinder based on rotation of the lever, wherein the pump cylinder rotates when the pump rod moves within the pump cylinder. 1. An apparatus comprising:a lever rotatably mounted to a support;a pump cylinder rotatable about a first end of the pump cylinder; anda pump rod operatively coupled to the lever to move within the pump cylinder based on rotation of the lever, wherein the pump cylinder rotates when the pump rod moves within the pump cylinder.2. The apparatus of claim 1 , further including a pivot pin operatively coupled to the first end of the pump cylinder claim 1 , the pump cylinder to rotate about the pivot pin.3. The apparatus of claim 2 , wherein a manifold operatively coupled to the pivot pin provides a fluid connection between the pump cylinder and a fluid reservoir.4. The apparatus of claim 3 , wherein the manifold further provides a fluid connection between the pump cylinder and a fluid control valve.5. The apparatus of claim 3 , wherein the pivot pin includes a channel to fluidly couple the pump cylinder to the manifold.6. The apparatus of claim 1 , wherein the pump cylinder includes a seal disposed at a first end to prevent fluid leakage when the pump rod moves within the pump cylinder.7. The apparatus of claim 1 , wherein claim 1 , when the lever is rotated from a first horizontal position to a second position further away from the pump cylinder than the first position claim 1 , the pump rod moves away from the pump cylinder and the pump cylinder rotates in a first direction.8. The apparatus of claim 7 , wherein claim 7 , when the lever is rotated from the second position to the first position claim 7 , the pump rod moves toward the pump cylinder and the pump ...

VARIABLE DISPLACEMENT VANE PUMP

A variable displacement vane pump includes: a control orifice that imparts resistance to a flow of working oil discharged from pump chambers; a flow-amount control valve that operates in accordance with an upstream-downstream differential pressure of the control orifice and controls a flow amount of the working oil discharged from the pump chambers; a variable control valve that is operated by the working oil that has passed through the control orifice and controls an amount of eccentricity of a cam ring with respect to a rotor by controlling a pressure difference between a first fluid pressure chamber and a second fluid pressure chamber; and a return passage that is connected to the flow-amount control valve and circulates a part of the working oil discharged from the pump chambers through a suction passage. 1. A variable displacement vane pump comprising:a rotor linked to a driving shaft;a plurality of vanes provided so as to be able to reciprocate in a radial direction relative to the rotor;a cam ring having an inner circumferential surface on which tip ends of the vanes slide by rotation of the rotor;pump chambers defined by the rotor, the cam ring, and pairs of the adjacent vanes;a suction passage configured to guide working fluid to the pump chambers;a first fluid pressure chamber and a second fluid pressure chamber defined in an outer-circumferential accommodating space on outer side of the cam ring, the first fluid pressure chamber and the second fluid pressure chamber being configured to make the cam ring eccentric with respect to the rotor by pressure difference between the first fluid pressure chamber and the second fluid pressure chamber;a control restrictor configured to impart resistance to a flow of the working fluid discharged from the pump chambers;a flow-amount control valve operated in accordance with an upstream-downstream differential pressure of the control restrictor, the flow-amount control valve being configured to control flow amount of the ...

System and method for monitoring component service life

Systems and methods are disclosed herein that include providing a service life monitoring system that includes a rotatable component and a rotatable measurement interface disposed on the rotatable component, the rotatable measurement interface having at least one torsional strain gauge configured to measure a strain of the rotatable component, a strain monitor controller configured to receive the measured strain of the rotatable component, and a wireless data transmission component configured to wirelessly communicate with the strain monitor controller to receive the measured strain, determine at least one of a power, rotational speed, torque, and service life of the rotatable component in response to receiving the measured strain of the rotatable component as a result of the measured strain of the rotatable component, and control at least one of the power, the rotational speed, and the torque of the rotatable component.

Strategy to Manage Pump Interactions in Multi-Rig Applications

A system for managing a pump arrangement is provided. The system may include at least one pressure sensor configured to generate a pressure signal indicative of a pump pressure of a targeted pump within the pump arrangement, and at least one controller in electrical communication with the pressure sensor. The controller may be configured to receive the pressure signal from the pressure sensor, apply a band pass filter on the pressure signal to filter frequencies associated with untargeted pumps, isolate at least a base frequency of the filtered pressure signal, and detect at least the pump pressure of the targeted pump based on the base frequency.

GAS COMPRESSOR AND SYSTEM AND METHOD FOR GAS COMPRESSING

Methods and systems are provided to adaptively control a hydraulic fluid supply to supply a driving fluid for applying a driving force on a piston in a gas compressor, the driving force being cyclically reversed between a first direction and a second direction to cause the piston to reciprocate in strokes. During a first stroke of the piston, a speed of the piston, a temperature of the driving fluid, and a load pressure applied to the piston is monitored. Reversal of the driving force after the first stroke is controlled based on the speed, load pressure, and temperature. 1. A method of adaptively controlling a hydraulic fluid supply to supply a driving fluid for applying a driving force on a piston in a gas compressor , the driving force being cyclically reversed between a first direction and a second direction to cause the piston to reciprocate in strokes , the method comprising:monitoring, during a first stroke of the piston, a speed of the piston, a temperature of the driving fluid, and a load pressure applied to the piston; andcontrolling reversal of the driving force after the first stroke based on the speed, load pressure, and temperature.213.-. (canceled)14. A control system for adaptively controlling a hydraulic fluid supply to supply a driving fluid for applying a driving force on a piston in a gas compressor , the driving force being cyclically reversed between a first direction and a second direction to cause the piston to reciprocate in strokes , the system comprising:{'b': 1', '2', '1', '2, 'first and second proximity sensors positioned and configured to respectively generate a first signal indicative of a first time (T) when a first part of the piston is in proximity of the first proximity sensor, and a second signal indicative of a second time (T) when a second part of the piston is in a proximity of the second proximity sensor, whereby a speed of the piston during a first stroke of the piston is calculable based on T, T and a distance between the ...

METHOD FOR SURVEILLANCE OF AIR OPERATED DIAPHRAGM PUMP AND SURVEILLANCE DEVICE

A method for surveillance of an air operated diaphragm pump is provided whereby initially an accelerometer with at least 3 orthogonal accelerometer measuring directions is attached to an air operated diaphragm pump or to a structure directly connected with an air operated diaphragm pump; agitation level of the accelerometer at a frequency rate above a predefined pulse rate of the air operated diaphragm pump is registered, and a base line noise level of the accelerometer agitation level during a period of no pump action is measured and stored, and a pulse rate of the air operated diaphragm pump is determined as the most significant frequency of pulses out of an entire power spectrum calculated from the accelerometer readings, and lastly the most significant frequency of pulses and the duration of registered pulse signals is determined and stored. 1. A method for surveillance of an air operated diaphragm pump , whereby the method comprises the following steps:attaching an accelerometer with at least 3 orthogonal accelerometer measuring directions to an air operated diaphragm pump or to a structure directly connected with an air operated diaphragm pump,register agitation level of the accelerometer at a frequency rate above a predefined pulse rate of the air operated diaphragm pump,determine a base line noise level of the accelerometer agitation level during a period of no pump action,determine the pulse rate of the air operated diaphragm pump as the most significant frequency of pulses out of an entire power spectrum calculated from the accelerometer readings,register the most significant frequency of pulses and the duration of registered pulse signals.3. A method according to claim 3 , wherein a sampling rate is selected and a number of samples M is chosen claim 3 , which reflects the pulse rate of the pump claim 3 , such that the number of samples M spans a time fraction of a pump pulse duration of no more than half the time of a pulse duration.4. A method according ...

Fracturing apparatus and control method thereof, fracturing system

A fracturing apparatus may include a first plunger pump including a first power end and a first hydraulic end; a prime mover including a first power output shaft; and a first clutch including a first connection portion and a second connection portion. The first power end of the first plunger pump includes a first power input shaft, the first connection portion is coupled to the first power input shaft, the second connection portion is coupled to the first power output shaft of the prime mover.

HIGH PRESSURE PUMP

A positive displacement pump for pumping a fluid mastic comprises a plurality of cylinders each having a piston arranged for reciprocal motion within the cylinder. Movement of the piston in a first direction draws the fluid into the cylinder and movement in a second, opposite direction pumps the fluid out of the cylinder. A variable speed electric motor is drivingly coupled to a cam arrangement providing a reciprocating drive to the pistons. The cam arrangement comprises cams shaped and arranged to drive each piston in the first direction over less than half of a rotational cycle and to drive each piston in the second direction over the remainder of the rotational cycle. The cams are arranged to drive the pistons out of phase with one another. 1. A positive displacement pump suitable for pumping a fluid mastic , the pump comprising:at least three cylinders wherein each cylinder each has a piston arranged for reciprocal motion within the cylinder, whereby movement of the piston in a first direction draws the fluid into the cylinder and movement in a second, opposite direction pumps the fluid out of the cylinder; anda variable speed electric motor drivingly coupled to a cam arrangement providing a reciprocating drive to the pistons,wherein the cam arrangement comprises cams shaped and arranged to drive each piston in the first direction over less than half of a rotational cycle and to drive each piston in the second direction over the remainder of the rotational cycle, wherein the cam arrangement has one cam for each piston, wherein each cam has a main surface and a return surface, wherein the main surface is configured to offset from the return surface along a direction of an axis of a cam shaft ,wherein the cams are arranged to drive the pistons out of phase with one another; andwherein the cams are arranged to drive the pistons such that, at any position of the rotational cycle more than half of the pistons are being driven in the second direction.2. The positive ...

Motor drive device and motor drive method for vehicle electric pump

A motor drive device and a motor drive method for a vehicle electric pump. The device and the method set a target value according to an instruction value of a motor control amount and control the motor of the vehicle electric pump based on the target value. When the instruction value is greater than an actual control amount, the instruction value is set to the target value. Meanwhile, when the instruction value is less than the actual control amount, the actual control amount is set to the target value when the actual control amount is less than a value less than a previous target value by a predetermined value, and the value less than previous target value by predetermined value is set to the target value of this time when the actual control amount is greater than the value less than previous target value by predetermined value.

Fracturing pump assembly

An improved fracturing pump is provided. The pump is reconfigurable on site. Internal components of the pump may be varied to meet the requirements of a specific operation. The reconfiguration gives the user the ability to increase or decrease the horsepower of the pump. A closed loop oil feed system provides constant and reliable lubrication even under heavy loads. The sealing system is enhanced to reduce leaks and thermal stresses. The pump also has an improved frame and chassis to reduce NVH and enhance reliability. 1. A fracturing pump assembly comprising: a frame having a plurality of bores formed therethrough; and a plurality of crossheads disposed in the plurality of bores , respectively , and adapted to reciprocate therein; a skid on which a power end is mounted; whereby said frame is reinforced by partition and said skid is integrated into said frame.2. The pump of wherein said frame includes opposing end walls with a series of partitioning walls disposed therebetween claim 1 , all of said walls having an opening formed therein claim 1 , where said walls have a series of enhancement members radiating outwardly therefrom.3. A fracturing pump assembly comprising: a frame having a plurality of bores formed therethrough; and a plurality of crossheads disposed in the plurality of bores claim 1 , respectively claim 1 , and adapted to reciprocate therein;a set of gears disposed within said frame, said gears mechanically connected to a source of motive power for turning a crankshaft, said crankshaft operating to cause reciprocating motion of a series of plungers having a predetermined stroke length a skid on which a power end is mounted;whereby said frame is reinforced by partition and said skid is integrated into said frame. This invention relates to pumps, and in particular, to an improved fracturing pump assembly.Drilling and production systems are often employed to access and extract hydrocarbons from subterranean formations. These systems may be located ...

DIAPHRAGM PUMP AND AGRICULTURE UNMANNED AERIAL VEHICLE

A diaphragm pump includes a pump body mechanism, a diaphragm mechanism, a motor mechanism, and an eccentric mechanism. The diaphragm mechanism includes a diaphragm. The eccentric mechanism including a bracket assembly and an auxiliary member. The motor mechanism includes a motor. The bracket assembly includes a bracket connected to the diaphragm and a driving member mounted at a motor shaft of the motor. The auxiliary member is mounted at the bracket, arranged corresponding to the driving member, and configured to contact the driving member. The diaphragm mechanism, the motor mechanism, and the eccentric mechanism are mounted at the pump body mechanism. The motor shaft is configured to drive the driving member to reciprocally abut against the auxiliary member to cause the bracket to move together with the auxiliary member to drive the diaphragm to reciprocate. 1. A diaphragm pump comprising:a pump body mechanism;a diaphragm mechanism including a diaphragm;a motor mechanism including a motor; and [ a bracket connected to the diaphragm; and', 'a driving member mounted at a motor shaft of the motor; and, 'a bracket assembly including, 'an auxiliary member mounted at the bracket, arranged corresponding to the driving member, and configured to contact the driving member;, 'an eccentric mechanism including the diaphragm mechanism, the motor mechanism, and the eccentric mechanism are mounted at the pump body mechanism; and', 'the motor shaft is configured to drive the driving member to reciprocally abut against the auxiliary member to cause the bracket to move together with the auxiliary member to drive the diaphragm to reciprocate., 'wherein2. The diaphragm pump of claim 1 , wherein:the bracket includes a mounting through hole;the driving member is at least partially arranged in the mounting through hole; andthe auxiliary member is arranged between the driving member and a side wall of the mounting through hole.3. The diaphragm pump of claim 1 , wherein the auxiliary ...

Torque Monitoring of Electrical Submersible Pump Assembly

An electrical submersible well pump assembly has a SAW (surface acoustic wave) sensor on a motor shaft. A SAW electronic circuit mounts to the motor housing. The SAW electronic circuit has an antenna closely spaced to the SAW sensor for monitoring torque on the motor shaft. A controller at an upper end of the well supplies power to the motor. A motor gauge unit mounted to a lower end of the motor transmits signals to the controller. A signal line extends from the SAW electronic circuit to the motor gauge unit for transmitting signals from the SAW electronic circuit to the motor gauge unit, and from the motor gauge unit to the controller. 1. An electrical submersible pump assembly for pumping well fluid from a well , comprising:a pump having a pump housing containing a plurality of pump stages through which a pump shaft extends;a motor having a motor housing containing a motor shaft;a seal section having a seal housing containing a seal shaft that is coupled to and between the pump shaft and the motor shaft;a motor shaft surface SAW (acoustic wave) sensor on the motor shaft;a motor shaft SAW electronic circuit mounted to the motor housing, the motor shaft SAW electronic circuit having a motor shaft SAW antenna closely spaced to the motor shaft SAW sensor for monitoring torque on the motor shaft;a controller adapted to be mounted at an upper end of the well for supplying power to the motor;a motor gauge unit mounted to a lower end of the motor for transmitting signals to the controller; anda signal line extending from the motor shaft SAW electronic circuit to the motor gauge unit for transmitting signals from the SAW electronic circuit to the motor gauge unit, and from the motor gauge unit to the controller.2. The assembly according to claim 1 , wherein:the motor shaft SAW sensor is located adjacent an upper end of the motor shaft.3. The assembly according to claim 1 , further comprising:a pump SAW sensor on the pump shaft;a pump SAW electronic circuit on the pump ...

ACTIVE HYDRAULIC RIPPLE CANCELLATION METHODS AND SYSTEMS

Presented herein are systems and methods for attenuating flow ripple generated by a hydraulic pump. In certain aspects, a method and system for operating a hydraulic positive displacement pump according to a stabilized command profile are disclosed, such that flow ripple generated by operation of the pump according to the stabilized command profile is attenuated as compared to operation of the pump according to a corresponding nominal command profile. In other aspects, a pressure-balanced active buffer is disclosed that allow for at least partially cancelling flow ripple in a hydraulic circuit comprising a pump. In another aspect, a method for generating ripple maps for a pump is disclosed. Such ripple maps may be used, for example, to determine the stabilized command profile used to operate the pump, or may be used by the pressure-balanced active buffer to counteract ripple in the hydraulic circuit. 148-. (canceled)49. A pressure-balanced active buffer for mitigating flow ripple , the pressure-balanced active buffer comprising:a buffer reservoir;a balance reservoir;a piston assembly comprising a first surface exposed to fluid in the buffer reservoir and a second surface exposed to fluid in the balance reservoir; andan actuator physically attached to the piston assembly.50. The pressure-balanced active buffer of claim 49 , wherein the piston assembly comprises:a buffer piston comprising the first surface;a balance piston comprising the second surface; andan intermediate chamber interposed between the buffer piston and the balance piston, wherein the intermediate chamber comprises a compressible fluid, wherein the actuator is physically attached to the buffer piston.51. The pressure-balanced active buffer of comprising:a buffer fluid channel in fluid communication with the buffer reservoir; anda balance fluid channel in fluid communication with the balance reservoir.52. The pressure-balanced active buffer of comprising:an actuator controller in communication with the ...

System and method for health management of pumping system

A method implemented by at least one processor includes receiving a plurality of operating parameters of a pumping system, wherein the pumping system has a plurality of pump-units powered by a generator-unit. The operating parameters include a pump-unit parameter and a generator-unit parameter. The method also includes receiving reference data of the pumping system, wherein the reference data includes measurements from the pumping system representative of performance of the plurality of pump-units. The method also includes determining one or more health parameters corresponding to one or more pump-units based on the plurality of operating parameters and the reference data. The method further includes modifying one or more input parameters of the generator-unit based on the one or more health parameters for continued operation of the pumping system.

Medical Air Compressor

A pump or compressor includes a rotating shaft, and at least a first piston rod substantially perpendicular to the rotating shaft and connecting a first pair of pistons at opposite ends of the piston rod. The piston rod moves back and forth relative to the rotating shaft. The compressor additionally includes a circular eccentric, and a circular ring connected to the circular eccentric via a bearing. A drive pin engages the circular ring at a fixed position on the circular ring and engages the at least a first piston rod. When rotational motion of the shaft rotates either the first piston rod and first pair of pistons or the circular eccentric, the drive pin and the first piston rod move back and forth relative to the rotating shaft.

Digital twin of centrifugal pump in pumping systems

A method and controller for creating a digital twin of a pump. The method includes receiving, by a controller, a specification curve corresponding to a centrifugal pump. The method includes building and executing, by the controller, a first model of the centrifugal pump, based on the specification curve. The method includes receiving sensor data corresponding to and during the operation of the pump. The method includes updating the first model according to the sensor data to produce an updated model, and storing the updated model as a digital twin of the centrifugal pump.

Pressure Pump Performance Monitoring System Using Torque Measurements

A monitoring system may include a strain gauge, a position sensor, and a torque sensor. The strain gauge may measure strain in a chamber of the pressure pump and generate a strain signal representing the strain measurement. The position sensor may measure a position of a rotating member and generate a position signal representing the position measurement. The torque sensor may measure torque in a component of the pressure pump and generate a torque signal representing the torque measurement. The torque measurement may be used with the strain measurement and the position measurement to determine a condition of the pressure pump.

Pressure Pump Valve Monitoring System

A monitoring system may include a position sensor, a strain gauge, and a computing device for determining the condition of a valve in a chamber of a pump using strain measurements. The strain gauge may determine strain in the chamber. The position sensor may determine the position of a crankshaft coupled to a plunger in the chamber. The computing device may receive signals generated by the strain gauge and the position sensor related to the strain in the chamber and the position of the crankshaft, respectively, and may process the signals to determine delays in the actuation of the valves. 1. A monitoring system for use in wellbore operations , comprising:a strain gauge positionable on a fluid end of a pump to measure strain in a chamber of the pump and generate a strain signal representing strain in the chamber, the strain signal being usable in determining actuation points for a valve in the chamber;a position sensor positionable on a power end of the pump to sense a position of a member of a rotating assembly of the pump and generate a position signal representing the position of the member during operation of the pump;a computing device couplable to the strain gauge and the position sensor, the computing device including a processing device for which instructions executable by the processing device are used to cause the processing device to determine a performance of the chamber of the pump based on the actuation points for the valve and the position of the member.2. The monitoring system of claim 1 , wherein the strain gauge is positionable on an external surface of the fluid end of the pump to measure the strain in the chamber of the pump.3. The monitoring system of claim 1 , wherein the position sensor is positionable proximate to a path of the rotating assembly to determine the position of the member.4. The monitoring system of claim 1 , wherein the position sensor is positionable on a crankcase of a crankshaft of the rotating assembly to determine a bolt ...

CEPSTRUM ANALYSIS OF OILFIELD PUMPING EQUIPMENT HEALTH

The present disclosure introduces apparatuses and methods for assessing health of oilfield pumping equipment. An example pump assembly health monitoring system receives angular position data, including angular positions associated with operation of the pump assembly, and parameter data, including values of a parameter associated with the pump assembly that fluctuates with the angular positions. The monitoring system determines a cepstrum of the parameter data with respect to the angular position data, and determines a ratio of a first amplitude of the cepstrum at a quefrency of about zero to a second amplitude of the cepstrum at a non-zero quefrency. The determined ratio is indicative of a health of a component of the pump assembly. 1. An apparatus , comprising: [ angular position data that includes angular positions that are associated with operation of the pump assembly; and', 'parameter data that includes values of a parameter that is associated with the pump assembly and that fluctuates with respect to the angular positions; and, 'communication means for receiving, determine a cepstrum of the parameter data with respect to the angular position data; and', 'determine a ratio of a first amplitude of the cepstrum at a quefrency of about zero to a second amplitude of the cepstrum at a non-zero quefrency, wherein the determined ratio is indicative of a health of one of the plurality of components., 'a processing device operable to], 'a monitoring system for assessing health of a pump assembly, wherein the pump assembly comprises a plurality of components that includes a prime mover and a pump driven by the prime mover, and wherein the monitoring system comprises2. The apparatus of wherein the determined ratio is indicative of remaining functional life of the one of the plurality of components.3. The apparatus of wherein the non-zero quefrency coincides with a rahmonic associated with the one of the plurality of components.4. The apparatus of wherein the pump ...

CONTROLLER FOR PUMP SYSTEM

A pump control system includes a pump operable via actuation of an actuator that moves an actuating element to cause the pump to generate an intake stroke and a discharge stroke to pump media along a pipe or conduit. A sensor is disposed at the actuator and is operable to sense the position of the actuating element during operation of the actuator and pump. A controller is operable to control the actuator. The controller, responsive to an output of the sensor, determines the current position of the actuating element and automatically controls the actuator to provide a selected performance of the pump. 1. A pump control system comprising:a pump operable via actuation of an actuator that moves an actuating element to cause the pump to generate an intake stroke and a discharge stroke to pump media along a pipe or conduit;a sensor disposed at the actuator and operable to sense the position of the actuating element during operation of the actuator and pump; anda controller operable to control the actuator, wherein the controller, responsive to an output of the sensor, determines the current position of the actuating element and automatically controls the actuator to provide a selected performance of the pump.2. The pump control system of claim 1 , wherein the selected performance comprises a selected stroke rate of the pump.3. The pump control system of claim 1 , wherein the selected performance comprises a selected pump discharge pressure.4. The pump control system of claim 1 , wherein the actuator comprises a pneumatic or hydraulic cylinder and the actuating element comprises a piston that moves within the cylinder responsive to pressurization of the cylinder.5. The pump control system of claim 4 , wherein the sensor comprises an ultrasonic sensor disposed at an end region of the cylinder to sense the location of the piston relative to the cylinder.6. The pump control system of claim 4 , wherein the pump comprises a diaphragm pump and wherein the piston moves relative ...

Valve timing in electronically commutated hydraulic machine

An electronically commutated hydraulic machine is coupled to a drivetrain. Working chambers of the hydraulic machine are connected to low and high pressure manifold through electronically controlled valves. The phase of opening and closing of the valves has a default. In order to avoid cycle failure due to acceleration events, for example due to backlash in the drivetrain, the phase of opening or closing of the electronically controlled valves is temporarily advanced or retarded from the default timing.

Method and apparatus for closed loop automatic refill of liquid color

Method and apparatus for furnishing process machines with liquid color from a supply thereof provides a loop conduit having respective ends receiving liquid color from the supply and discharging liquid color back into the supply, pumping liquid color through the loop conduit and discharging liquid color from the loop conduit at an intermediate position into a reservoir associated with a process machine upon liquid color level in the reservoir being at a low level limit.

Bulk Modulus Monitoring System

A monitoring system may include at least a strain gauge and a computing device for determining a bulk modulus of a fluid system of a pressure pump using strain measurements. The strain gauge may determine strain in a chamber of the pressure pump. The computing device may receive a strain signal generated by the strain gauge and may correlate the strain signal to pressure to determine a change in pressure during a period in which fluid is isolated in the chamber. The computing device may use the change in pressure during this period to determine a bulk modulus of the fluid system. 1. A monitoring system for a pump , comprising:a strain gauge positionable on a fluid end of the pump to measure strain in a chamber of the pump and generate a strain signal representing the strain in the chamber, the strain signal being useable in determining actuation points for valves in the chamber; anda computing device couplable to the strain gauge, the computing device including a processing device for which instructions executable by the processing device are used to cause the processing device to determine a bulk modulus of fluid isolated in the chamber during an amount of time between the actuation points for the valves.2. The monitoring system of claim 1 , wherein the computing device comprises a memory device including instructions executable by the processing device for causing the processing device to determine the actuation points for the valves in the chamber by identifying discontinuities in the strain signal claim 1 , wherein the valves include a first valve and a second valve claim 1 , wherein the actuation points include a first point corresponding to a closing of the first valve and a second point corresponding to an opening of the second valve.3. The monitoring system of claim 1 , wherein the computing device comprises a memory device including instructions executable by the processing device for causing the processing device to correlate a portion of the strain signal ...

Critical Valve Performance Monitoring System

A monitoring system may include a position sensor, strain gauges, and a computing device for monitoring valves in a pressure pump having multiple chambers to determine critical valve limits for the valves using strain measurements for each charmber. The strain gauges may determine strain in each chamber of the pressure pump. The position sensor may determine the position of a crankshaft mechanically coupled to a plunger in each chamber. The computing device may receive signals generated by the strain gauges and the position sensor related to the strain in each chamber and the position of the crankshaft, respectively, and may process the signals to determine delays in the actuation of the valves for determining critical valve limits. 1. A monitoring system for use in a pump having multiple chambers , comprising:a position sensor positionable on a power end of the pump to sense a position of a member of a rotating assembly of the pump and generate a position signal representing the position of the member during operation of the pump, the position signal being usable in determining a position of a displacement member in each of three or more chambers in a fluid end of the pump;three or more strain gauges positionable on the three or more chambers to measure strain in the three or more chambers and generate corresponding strain signals representing the strain in each of the three or more chambers, the corresponding strain signals being usable in determining actuation points for corresponding valves in each of the three or more chambers; anda computing device couplable to the position sensor and the three or more strain gauges, the computing device including a processing device for which instructions executable by the processing device are used to cause the processing device to determine actuation delays of each of the corresponding valves by correlating the position of the displacement member in each of the three or more chambers with the actuation points for the ...

VAPOR COMPRESSION SYSTEM AND METHOD OF EXTENDING SERVICE LIFE OF SAME

A vapor compression system including a motor having a housing and a shaft having an axis, the shaft urgable into rotational movement by the motor for powering a system component. A primary bearing and a secondary bearing are positioned in the housing for rotatably supporting the shaft, the primary bearing rotatably supporting the shaft during normal system operation. A first bearing stop and a second bearing stop are positioned on opposite sides of the secondary bearing for transmitting axial forces generated along the shaft for reaction by the motor housing during abnormal system operation. At least a portion of corresponding surfaces of each of the first bearing stop and the second bearing stop facing the secondary bearing have a protective overlying layer of material applied thereto. 1. A vapor compression system comprising:a motor comprising a housing;a shaft comprising an axis, the shaft urgable into rotational movement by the motor for powering a system component;a primary bearing and a secondary bearing positioned in the housing for rotatably supporting the shaft, the primary bearing rotatably supporting the shaft during normal system operation; anda first bearing stop and a second bearing stop positioned on opposite sides of the secondary bearing for transmitting axial forces generated along the shaft for reaction by the motor housing during abnormal system operation;wherein at least a portion of corresponding surfaces of each of the first bearing stop and the second bearing stop facing the secondary bearing comprises a protective overlying layer of material applied thereto.2. The vapor compression system of claim 1 , wherein the protective overlying layer is taken from the group consisting of titanium nitride claim 1 , titanium carbon nitride claim 1 , titanium aluminium nitride claim 1 , and other variations of titanium nitride.3. The vapor compression system of claim 1 , wherein the primary bearing is a magnetic bearing.4. The vapor compression system of ...

Electric Oil Pump Device

An electric oil pump device includes an electric oil pump driven by a motor and a microcomputer that adjusts a control parameter of feedback control related to a motor current value or a motor rotation speed based on an oil temperature estimated based on a relationship between at least one of a hydraulic pressure, the motor current value, or a torque of the electric oil pump and at least one of an oil discharge amount or the motor rotation speed of the electric oil pump. 1. An electric oil pump device comprising:an electric oil pump including a motor and driven by the motor; anda controller that estimates an oil temperature based on a relationship between at least one of a hydraulic pressure, a motor current value, or a torque of the electric oil pump and at least one of an oil discharge amount or a motor rotation speed of the electric oil pump detected during operation of the electric oil pump, and adjusts a control parameter of feedback control related to the motor current value or the motor rotation speed based on the estimated oil temperature.2. The electric oil pump device according to claim 1 , wherein the controller determines an excessive or deficient state of at least one of the hydraulic pressure or the oil discharge amount of the electric oil pump based on the estimated oil temperature claim 1 , and adjusts the control parameter of the feedback control related to the motor current value or the motor rotation speed so as to avoid the excessive or deficient state.3. The electric oil pump device according to claim 2 , whereinthe excessive and deficient states include the deficient state of at least one of the hydraulic pressure or the oil discharge amount of the electric oil pump in a case in which the estimated oil temperature is less than a first threshold and the excessive state of at least one of the hydraulic pressure or the oil discharge amount of the electric oil pump in a case in which the estimated oil temperature is greater than a second threshold, ...

DEVICE AND METHOD FOR MONITORING OIL PRESSURE IN OIL CYLINDER OF DIAPHRAGM COMPRESSOR

The present disclosure provides a device for monitoring oil pressure in an oil cylinder of a diaphragm compressor, including a piston rod and a strain gauge circuit. The strain gauge circuit includes a strain gauge component and a bridge circuit connected, and the strain gauge component is arranged on the surface of the piston rod. A strain gauge component is noninvasively arranged on the piston rod of the diaphragm compressor to measure the load of the piston rod, such that the oil pressure can be measured indirectly, and thus the oil pressure of the diaphragm compressor can be measured nondestructively. Nondestructive and noninvasive monitoring of the diaphragm compressor is safe and reliable, and can achieve accurate monitoring of the oil pressure especially in high-pressure working conditions. 1. A device for monitoring oil pressure in an oil cylinder of a diaphragm compressor , comprising: a piston rod and a strain gauge circuit , wherein the strain gauge circuit comprises a strain gauge component and a bridge circuit connected , and the strain gauge component is arranged on a surface of the piston rod.2. The device for monitoring oil pressure in the oil cylinder of the diaphragm compressor according to claim 1 , wherein the strain gauge component comprises a first strain gauge claim 1 , and the first strain gauge is connected to the bridge circuit.35. The device for monitoring oil pressure in the oil cylinder of the diaphragm compressor according to claim 1 , wherein the strain gauge component comprises a second strain gauge and a third strain gauge () claim 1 , the second strain gauge is arranged along an axial direction of the piston rod claim 1 , and the third strain gauge and the second strain gauge are perpendicular to each other; the second strain gauge is connected to a first bridge arm claim 1 , and the third strain gauge is connected to a second bridge arm.4. The device for monitoring oil pressure in the oil cylinder of the diaphragm compressor ...

ELECTRONIC CONTROL DEVICE FOR A REFRIGERANT COMPRESSOR

The invention relates to an electronic control device () for a refrigerant compressor, comprising at least: a drive unit (); and a compression mechanism () which is actively connected to the drive unit (), with at least one piston () which is driven by a crankshaft () and moves back and forth between a lower and an upper dead point in a cylinder of a cylinder block (), in which the electronic control device () is designed to detect, control and/or regulate the rotational speed (ω) of the drive unit () and to at least approximately detect the piston position, and in which the electronic control device () is designed to drive the compression mechanism () by means of the drive unit () in such a way that at least one drive angle segment (ΔΦ) and at least one transit angle segment (Δτ) is provided for the duration of a regulating time interval (Δt) comprising more than one crankshaft rotation, for a plurality of crankshaft rotations, preferably for each crankshaft rotation of the regulating time interval (Δt), and the compression mechanism () is subject to a positive operating torque (Bm) during the at least one drive angle segment (ΔΦ), and to a smaller positive operating torque (Bmv) compared to the positive operating torque (Bm) or to no positive operating torque (Bm) during the at least one transit angle segment (Δτ). 2. The electronic control device of a refrigerant compressor according to claim 1 , wherein the ratio between positive operating torque (Bm) and reduced positive operating torque (Bmv) is ≥1/0.2.3. The electronic control device according to claim 1 , wherein it is designed to provide multiple drive angle segments (ΔΦ) and multiple transit angle segments (Δτ) alternately during one crankshaft rotation.4. The electronic control device according to claim 1 , wherein it is designed to provide the drive angle segment or segments (ΔΦ claim 1 , ΔΦ) with positive operating torque (Bm) when the piston is located between a lower and an upper dead point in a ...

Method for Actuating Semi-Commanded Valve and System for Actuating Semi-Commanded Valve for Multi-Suction Alternative Compressor

The present invention refers to a method for actuating semi-controlled valve that acts in synchronism with the compression cycles of an alternative compressor and to a system for actuating a multi-suction alternative compressor semi-controlled valve. Said method comprises at least a step of detecting at least one compression peak (1) in the course of at least one mechanical cycle (2) of the alternative compressor; and at least a step of switching the functional status of at least an alternative compressor semi-controlled valve (3) based on detecting at least one compression peak (1) in the course of at least one mechanical cycle (2) of the alternative compressor (5).

HYDRAULIC PUMP MALFUNCTION DIAGNOSING DEVICE

A malfunction diagnosing device that includes pistons arranged in a circumferential direction and discharges oil with rotation in the circumferential direction is provided, including: a pressure sensor for detecting a pressure value of oil discharged from a hydraulic pump in rotation; a speed sensor for detecting a rotation phase of the hydraulic pump at a time when a pressure value of oil is detected by the pressure sensor; a phase calculation part; and a rendering part for rendering a model of a relationship between pressure values of oil detected by the pressure sensor and rotation phases of the hydraulic pump detected by the speed sensor and the phase calculation part to thereby obtain pulsating waveform data. This makes it possible to diagnose a malfunction of the hydraulic pump without influence of a change in a rotation speed of the hydraulic pump. 1. A device for diagnosing a malfunction of a hydraulic pump that includes a plurality of pistons arranged in a circumferential direction and discharges liquid with rotation in the circumferential direction , comprising:a pressure detection section for detecting a pressure value of liquid discharged from the hydraulic pump in rotation;a rotation phase detection section for detecting a rotation phase of the hydraulic pump at the time when a pressure value of liquid is detected by the pressure detection section; anda rendering section for rendering a model of a relationship between pressure values of liquid detected by the pressure detection section and rotation phases of the hydraulic pump detected by the rotation phase detection section to thereby obtain pulsating waveform data.2. The device for diagnosing a malfunction of a hydraulic pump according to claim 1 , wherein the rendering section performs: superimposing claim 1 , detections for each rotation of the hydraulic pump on one another at specific phases to thereby obtain a relationship between pressure values of liquid detected by the pressure detection ...

Rod pumping unit and method of operation

A controller for operating a prime mover of a rod pumping unit includes a processor configured to operate the prime mover over a first stroke and a second stroke. The controller is further configured to compute a first motor torque imbalance value for the first stroke and engage adjustment of a counter-balance. The controller is further configured to estimate a second motor torque imbalance value for the second stroke. The controller is further configured to disengage adjustment of the counter-balance during the second stroke upon the second motor torque imbalance value reaching a first imbalance range.

COMPRESSOR PROVIDED WITH AN ELECTRONIC PRESSURE SWITCH AND METHOD OF REGULATING THE PRESSURE WITHIN SUCH A COMPRESSOR

A compressor provided with a compressor element, a motor configured to drive said compressor element and an electronic pressure switch. The electronic pressure switch includes a pressure sensor; a current sensor; a microprocessor unit including a first input port and a second input port; a first communication unit; and a second communication unit. The electronic pressure switch includes a housing. The microprocessor unit, the pressure sensor, the current sensor, the first communication unit and the second communication unit are integrated in said housing. 115-. (canceled)16. A compressor comprising a compressor element , a motor configured to drive said compressor element and an electronic pressure switch , said electronic pressure switch comprising:a pressure sensor for sensing a pressure signal at a compressed gas outlet of the compressor;a current sensor for sensing a current signal of the motor driving the compressor element;a microprocessor unit comprising a first input port connected to said pressure sensor for receiving a signal based on the pressure measurement and a second input port connected to said current sensor for receiving a current signal based on the current measurement;a first communication unit for connecting the electronic pressure switch with a drive of the motor;a second communication unit for connecting the electronic pressure switch with a blow-off valve provided at the compressed gas outlet, wherein the electronic pressure switch further comprises a housing, and wherein the microprocessor unit, the pressure sensor, the current sensor, the first communication unit and the second communication unit are integrated in said housing.17. The compressor according to claim 16 , wherein the compressor further comprises a pressure vessel and in that the electronic pressure switch is adapted to be provided on a vessel outlet of said pressure vessel.18. The compressor according to claim 16 , wherein the electronic pressure switch further comprises a ...

LIFT APPARATUS FOR DRIVING A DOWNHOLE RECIPROCATING PUMP

A lift apparatus and method for driving a downhole reciprocating pump is disclosed. The apparatus includes a hydraulic cylinder having a piston and a hydraulic fluid port, the piston being coupled to a rod for driving the reciprocating pump, the piston being moveable between first and second ends of the cylinder in response to a flow of hydraulic fluid through the hydraulic fluid port. The apparatus also includes a variable displacement hydraulic pump coupled to receive a substantially constant rotational drive from a prime mover for operating the hydraulic pump, the hydraulic pump having an outlet and being responsive to a displacement control signal to draw hydraulic fluid from a reservoir and to produce a controlled flow of hydraulic fluid at the outlet. The apparatus also includes a hydraulic fluid line connected to deliver hydraulic fluid from the outlet of the hydraulic pump through the hydraulic fluid port to the cylinder for causing the piston to move through an upstroke away from the first end and toward the second end of the cylinder. The apparatus further includes a valve connected between the hydraulic fluid port and the reservoir, the valve being responsive to a valve control signal for controlling discharge of hydraulic fluid from the hydraulic fluid port of the cylinder back to the reservoir to facilitate movement of the piston through a downstroke away from the second end toward the first end of the cylinder. The valve is operable to prevent flow of hydraulic fluid through the valve during the upstroke and the hydraulic pump is operable to prevent flow of hydraulic fluid back into the outlet of the hydraulic pump during the downstroke. 1. A lift apparatus for driving a downhole reciprocating pump , the apparatus comprising:a hydraulic cylinder having a piston and a hydraulic fluid port, the piston being coupled to a rod for driving the reciprocating pump, the piston being moveable between first and second ends of the cylinder in response to a flow of ...

LIFT APPARATUS FOR DRIVING A DOWNHOLE RECIPROCATING PUMP

A lift apparatus and method for driving a downhole reciprocating pump is disclosed and includes a hydraulic cylinder having a piston and a hydraulic fluid port, the piston being coupled to a rod for driving the reciprocating pump, the piston being moveable between first and second ends of the cylinder in response to a flow of hydraulic fluid through the hydraulic fluid port. A variable displacement hydraulic pump is responsive to a displacement control signal to draw hydraulic fluid from a reservoir and to produce a controlled flow of hydraulic fluid at the outlet. The apparatus also includes a valve connected between the hydraulic fluid port and the reservoir, the valve being responsive to a valve control signal for controlling discharge of hydraulic fluid from the hydraulic fluid port of the cylinder back to the reservoir to facilitate movement of the piston through a downstroke away from the second end toward the first end of the cylinder. The apparatus further includes a first sensor located proximate the first end of the cylinder and operable to produce a first signal indicating a proximity of the piston to the first sensor, a second sensor located proximate the second end of the cylinder and operable to produce a second signal indicating a proximity of the piston to the second sensor, and a controller operably configured to generate the displacement control signal and the valve control signal in response to receiving the first signal and the second signal. 1. A lift apparatus for driving a downhole reciprocating pump , the apparatus comprising:a hydraulic cylinder having a piston and a hydraulic fluid port, the piston being coupled to a rod for driving the reciprocating pump, the piston being moveable between first and second ends of the cylinder in response to a flow of hydraulic fluid through the hydraulic fluid port;a variable displacement hydraulic pump coupled to receive a substantially constant rotational drive from a prime mover for operating the ...

PUMP MODULE

A pump module with a casing having at least one pump piston is mounted in a reciprocatingly movable manner and may include a sealing element which, in pumping operation, abuts in a sealing manner against a cylinder. An embodiment of a pump module, which is easy to produce and can be disinfected or sterilized in a simple manner, includes a pump piston that can be fixated in a parking position in which the sealing element does not abut against the cylinder. 1. A pump module comprising a casing in which at least one pump piston is mounted in a reciprocating manner and provided with at least one sealing element which in a pumping operation sealingly abuts against a cylinder , and further comprising a locking element which is arranged on said casing and which in a parking position , in which said sealing element does not abut against said cylinder , interacts with a locking counter-element provided on said pump piston for fixing said pump piston in the parking position.2. The pump module according to claim 1 , wherein said locking element or said locking counter-element comprises two radial projections provided at an axial distance from one another between which the other of said locking element or said locking counter-element engages in the parking position.3. The pump module according to one claim 1 , wherein said locking counter-element is in the pumping operation guided in a guide cylinder of said casing being axially disposed ahead of said cylinder.4. The pump module according to claim 1 , further comprising a conical in-feed device disposed ahead of said cylinder claim 1 , wherein the smallest inner diameter of said conical in-feed device substantially corresponds to the inner diameter of said cylinder.5. The pump module according to claim 4 , wherein in the parking position said sealing element is arranged in said conical in-feed device.6. The pump module according to claim 1 , wherein said pump piston comprises a plunger body formed from plastic material and at ...

Apparatus and methods for optimizing control of artificial lifting systems

A system and method for optimizing performance of an artificial lift system are provided. The optimization process can be performed automatically by a controller configured to receive optimization parameters from the user and information regarding the performance of the system. The optimization process adjusts the pumping speed of the system in response to measured rod load and a position of the downhole pump or surface pumping unit. More particularly, the optimization process can increase or decrease the pump speed of the system in response to the measured rod load at a reference position relative to a reference rod load at the reference position. The reference load and position can be selected to indicate pump inefficiencies. For example, the target reference load and position can indicate fluid pounding if the measured rod load at the reference position is greater than the reference rod load at the reference position.

Operating Device, Method For Operating An Operating Device, Diaphragm Pump Having An Operating Device And A Diaphragm Pump Device, And A Blood Treatment Apparatus Having A Diaphragm Pump

The invention relates to an actuating device () for mechanically controlling a membrane pump device (), having a base body () which comprises a mounting face () for a membrane pump device () and through which a control fluid line () passes which extends from a control fluid port () to a control fluid opening () which opens at the mounting face (), a control fluid valve () being arranged in the control fluid line (), which control fluid valve is designed to influence a cross section of the control fluid line (), and having an adjustment device (), which comprises a fluid actuator () arranged on the mounting face () for providing an adjustment movement, and a working fluid valve () which is designed to influence a cross section of a working fluid line () which passes through the base body (), and the control fluid valve () and the working fluid valve () being electrically connected to a control device () which is designed to electrically control the control fluid valve () and the working fluid valve (). Moreover, the invention relates to a membrane pump which has such an actuating device and such a membrane pump device, as well as to a blood treatment device which has such a membrane pump. 1. Actuating device for mechanically controlling a membrane pump device for conveying fluids having a base body which comprises a mounting face for a membrane pump device and through which a control fluid line passes which extends from a control fluid port to a control fluid opening which opens at the mounting face , wherein a control fluid valve is arranged in the control fluid line , which control fluid valve is designed to influence a cross section of the control fluid line , and having an adjustment device which comprises a fluid actuator arranged on the mounting face for providing an adjustment movement , and a working fluid valve which is designed to influence a cross section of a working fluid line which passes through the base body , and wherein the control fluid valve and ...

AXIALPISTON MACHINE

Axial piston machine comprising a drive shaft, a drive mechanism that is connected thereto for conjoint rotation and comprises one or more drive-mechanism pistons, the piston stroke of which can be set by a swash plate, at least one return spring acting on the swash plate and a setting piston supporting on the swash plate, the axial piston machine comprising at least one control or regulating valve or at least one control or regulating unit, characterized in that a setting piston is guided in the connecting plate and a setting lever acts as a coupling member between the setting piston and the swash plate and the setting-piston axis and the setting-lever axis are positioned in a plane E, in particular in a half plane E* extending from the drive-shaft axis M. 1. Axial piston machine comprising a drive shaft , a drive mechanism that is connected thereto for conjoint rotation and comprises one or more drive-mechanism pistons , a piston stroke of which can be set by a swash plate , wherein at least one return spring acts on the swash plate and a setting piston is supported on the swash plate , wherein the axial piston machine comprises at least one control or regulating valve or at least one control or regulating unit , whereina setting piston is guided in a connecting plate and a setting lever acts as a coupling member between the setting piston and the swash plate and a setting-piston axis and a setting-lever axis are positioned in a plane.2. Axial piston machine according to claim 1 , wherein the setting-lever axis are positioned in a plane claim 1 , the plane being a half plane extending from a drive-shaft axis claim 1 , and wherein the setting-piston axis extends in parallel with the drive-shaft axis and the setting-lever axis is positioned in the plane.3. Axial piston machine according to claim 2 , wherein the setting lever allows for approximately parallel functional positions relative to the drive-shaft axis and/or approximately coaxial functional positions ...

METHOD FOR DETERMINING A FLOW VOLUME OF A FLUID DELIVERED BY A PUMP

A method for determining a flow volume of a fluid delivered by a pump, wherein the flow volume is determined as a function of predefined pump information depending on a pump geometry, rotation speed information, which correlates with the rotation speed of the pump, and pressure information, which correlates with a differential pressure at the pump. 1. A method for determining a flow volume of a fluid delivered by a pump , wherein the flow volume is determined as a function of predefined pump information , which is dependent on a pump geometry , a rotation speed information , which correlates with the rotation speed of the pump , and pressure information , which correlates with a differential pressure at the pump.2. A method according to claim 1 , wherein the flow volume is calculated by subtracting a leakage volume flow determined as a function of the pressure information from a theoretical delivery volume flow determined as a function of a pump volume predefined by the pump information and the rotation speed information.3. A method according to claim 1 , wherein claim 1 , as additional information claim 1 , a temperature and/or a viscosity and/or a density of the fluid claim 1 , and/or an operating current and/or a shaft torque of the pump are registered claim 1 , wherein the flow volume and/or the leakage volume flow are determined as a function of the additional information.4. A method according to claim 1 , wherein at least one pressure sensor claim 1 , and/or at least one force sensor which registers a force acting on a pump component claim 1 , in particular on a bearing claim 1 , are used to determine the pressure information.5. A method according to claim 1 , wherein claim 1 , by a vibration sensor claim 1 , a vibration of at least one component of the pump is registered claim 1 , wherein the rotation speed information is determined in dependence on sensor data of the vibration sensor.6. A method according to claim 1 , wherein the pump information describes a ...

SYSTEM AND METHOD FOR DETERMINING LOAD AND DISPLACEMENT OF A POLISHED ROD

An apparatus includes a body. The body includes first and second clamping mechanisms that are configured to grip a tubular member of a beam pump unit at first and second axially-offset locations along the tubular member, respectively. The body also includes a base positioned at least partially between the first and second clamping mechanisms. The apparatus also includes a strain gauge coupled to the base and configured to measure a strain on the tubular member as the tubular member moves. The apparatus also includes a gyroscope configured to measure an orientation, an angular velocity, or both of the beam pump unit as the beam pump unit operates. The apparatus also includes an accelerometer configured to measure an acceleration of the beam pump unit as the beam pump unit operates. 1. An apparatus , comprising: a first clamping mechanism configured to grip a tubular member of a beam pump unit at a first location along the tubular member;', 'a second clamping mechanism configured to grip the tubular member at a second location along the tubular member that is axially-offset from the first location; and', 'a base positioned at least partially between the first and second clamping mechanisms;, 'a body comprisinga strain gauge coupled to the base and configured to measure a strain on the tubular member as the tubular member moves;a gyroscope configured to measure an orientation, an angular velocity, or both of the beam pump unit as the beam pump unit operates; andan accelerometer configured to measure an acceleration of the beam pump unit as the beam pump unit operates.2. The apparatus of claim 1 , wherein the tubular member comprises a polished rod of the beam pump unit.3. The apparatus of claim 2 , wherein the gyroscope is coupled to the body.4. The apparatus of claim 2 , wherein the accelerometer is coupled to the body.5. The apparatus of claim 1 , wherein the base has a bore formed at least partially therethrough claim 1 , such that the base defines first and second ...

Positive displacement pump controller and method of operation

Non-limiting exemplary embodiments of a pumping system and methods for operating the pumping system in a region of high pressure or a region of high flow are disclosed. The pumping system includes a piston disposed within a piston cylinder, a drive shaft, an eccentric coupled to the drive shaft, a connecting arm having opposing first and second ends, and a controller for controlling the rotation of the drive shaft such that the piston oscillates within a region of high pressure or a region of high flow.

Method of operating a peristaltic pump

A method for operating a peristaltic pump having a molded flow channel contained on an elastomeric sheet that is bonded or mechanically attached to a rigid substrate. The pump head rollers are mounted radially from the axis of rotation of the pump motor and compress the elastomeric flow channels against the rigid substrate. During reflux, the pump head is positioned so that at least one of the rollers compresses the elastomeric flow channel at the input end of the peristaltic pump. Such an operation minimizes the amount of the elastomeric sheet that is exposed to high transient pressures.

Volumetric pump with bi-directional sphincter seal

A volumetric pump comprises a housing having an elongate cavity with open and closed ends. A resilient sheet of material having two branched portions forming an aperture is disposed over the housing. A pump shaft is slidably disposed through the aperture such that one branched portion toward the cavity and the other branched portion extends away from the housing such that a sphincter seal is formed about the shaft. An inlet conduit leading from a fluid source passes through the housing into the cavity near one end thereof, and an outlet conduit leading to a fluid sink passes through the housing from the cavity near the other end thereof. The shaft is driven back and forth in reciprocating motion, to alternatively produce a positive pressure forcing fluid out of the outlet conduit to the fluid sink, and a negative pressure forcing fluid from the fluid source through the inlet conduit.

Device for adjustment of the delivery rate of a hydraulic pump

Control system and method for reciprocating compressors

The present invention relates to a control system for hermetic cooling compressor, which includes a reciprocating compressor (3) and an electronic control (2) for the reciprocating compressor (3), the electronic control (2) being configured for, after commanding the turning off of the reciprocating compressor (3), detecting whether the turn velocity (23) of the turning axle (10) is below a predefined velocity level, and then applying a braking torque (36) that causes deceleration of the turning axle (10) before completing the next turn of the turning axle (10), in case the turn velocity (23) detected is below the velocity level (34).

Pumping apparatus for delivering liquid at high pressure

Verstellbare hydraulische Arbeitsmaschine

Es wird eine elektrohydraulisch verstellbare Arbeitsmaschine (10) vorgeschlagen, die zur Verstellung in eine Neutralhubposition im Falle von Störungen im Regelkreis der Hubeinrichtung (16) mit einer schnell und genau schaltenden Sicherheitseinrichtung (40) ausgestattet ist. Diese wird erfindungsgemäß von einem konventionellen, elektromagnetischen Schaltventil (41) gebildet, das dem Regelventil (28) der Hubeinrichtung (16) nachgeschaltet ist. Das Schaltventil (41) ist als 6/2-Wegeventil in Schieberventiltechnik ausgeführt und läßt sich ohne konstruktive Eingriffe am Regelventil (28) bauraumsparend an der Arbeitsmaschine (10) befestigen. Auch Arbeitsmaschinen (10), deren Verstellung durch eine Fremddruckversorgungspumpe (34) erfolgt, lassen sich mit einer derartigen Sicherheitseinrichtung (40) vor einer Selbstzerstörung im Störungsfall absichern.

Hydraulisches System mit einer verstellbaren hydrostatischen Maschine

Die Erfindung betrifft ein hydraulisches System mit einer verstellbaren hydrostatischen Maschine (2) mit einem Verstellmechanismus. Der Verstellmechanismus wirkt mit einer Stellvorrichtung zusammen, die zumindest einen einen Stelldruckraum begrenzenden Stellkolben (8) aufweist. Das System weist ein Regelventil (16) auf, mit dem zur Verschiebung des Stellkolbens (8) und damit zur Betätigung der Verstellvorrichtung die Zu- und Abfuhr von Druckmittel in oder aus dem Stelldruckraum (12) steuerbar ist, wobei das Regelventil (16) einen Ventilkolben aufweist, der mit einer von der Position des Verstellmechanismus abhängigen Kraft einer Rückkoppelfeder beaufschlagt ist. Der Ventilkolben ist zusätzlich mit einer gegen die Kraft der Rückkoppelfeder wirkenden Gegenkraft beaufschlagt und es ist ein Betätigungsmittel (24) vorgesehen, mit dem der Ventilkolben mit einer gleichsinnig mit der Gegenkraft wirkenden oder mit einer entgegen die Gegenkraft wirkenden Steuerkraft beaufschlagbar ist.

Hall effect monitoring of wear of bearing supporting a rotor within a stationary housing

An apparatus is provided for monitoring a rotor mounted for rotation by bearings within a stationary housing of an apparatus, such as a sealless pump. In a first embodiment, the monitoring apparatus includes at least one magnet mounted on the circumference of the rotor and a plurality of hall effect devices which sense magnetic flux density as the rotor rotates to generate signals representative of radial and axial bearing wear as well as signals representative of the direction of rotation of the rotor. In a further embodiment, the monitoring apparatus includes magnetic material mounted in one or more locations around the rotor or entirely around the rotor and a plurality of hall effect devices and associated magnets mounted within the stationary housing and surrounding the rotor. The monitoring apparatus further includes a monitor for monitoring the amount of electrical power driving the pump as well as a monitor for monitoring the temperature of a containment shell which encloses the rotor within the sealless pump.

Method of operating a peristaltic pump

A method for operating a peristaltic pump having a molded flow channel contained on an elastomeric sheet that is bonded or mechanically attached to a rigid substrate. The pump head rollers are mounted radially from the axis of rotation of the pump motor and compress the elastomeric flow channels against the rigid substrate. During reflux, the pump head is positioned so that at least one of the rollers compresses the elastomeric flow channel at the input end of the peristaltic pump. Such an operation minimizes the amount of the elastomeric sheet that is exposed to high transient pressures.

METHOD OF HANDLING OF PERISTAL PUMP

Παρέχεται μία μέθοδος χειρισμού περισταλτικής αντλίας (10). Η περισταλτική αντλία αποτελείται από ένα διαμορφωμένο σωλήνα ροής (26) που περιέχεται σε ένα ελαστομερές φύλλο (20) που είναι συνδεδεμένο ή μηχανικά προσαρτημένο σε ένα άκαμπτο υπόστρωμα (22). Οι κύλινδροι της κεφαλής της αντλίας (16) είναι μονταρισμένοι ακτινωτά από τον άξονα περιστροφής (24) του κινητήρα της αντλίας (12) και πιέζουν τους ελαστομερείς σωλήνες ροής ενάντια στο άκαμπτο υπόστρωμα. Κατά τη διάρκεια του παλίνδρομου ρεύματος η κεφαλή της αντλίας είναι έτσι τοποθετημένη ώστε τουλάχιστον ένας από τους κυλίνδρους έχει σταθμεύσει σε μία θέση ώστε να συμπιέζει τον ελαστομερή σωλήνα ροής στο άκρο εισροής της περισταλτικής αντλίας. Ένας τέτοιος χειρισμός ελαχιστοποιεί την ποσότητα του ελαστομερούς φύλλου που είναι εκτεθειμένη σε υψηλές παροδικές πιέσεις. A method of handling a peristaltic pump (10) is provided. The peristaltic pump comprises a shaped flow tube (26) contained in an elastomeric sheet (20) that is attached or mechanically attached to a rigid substrate (22). The pump head cylinders (16) are mounted radially from the rotary shaft (24) of the pump motor (12) and press the elastomeric flow tubes against the rigid substrate. During the reciprocating current the pump head is positioned such that at least one of the rollers is parked in a position to compress the elastomeric flow tube at the inlet end of the peristaltic pump. Such manipulation minimizes the amount of elastomeric sheet exposed to high transient pressures.

両方向緊密シールを備えた容積ポンプ

(57)【要約】 【課題】 静脈内投与セット、他の治療装置などに使用 するのに特に好適な新規且つ改良された小型化でき簡単 且つ安価に製造できる容積ポンプを提供する。 【解決手段】 ポンピングされる流体を保持し、その損 失および漏れを防止するために、単純な円周方向の緊縮 シールが使用される。一実施例では、内部に細長い空所 が画成され、その空所の一端部における開口に隣接して 弾発性シート材が配置される。シートには空所の開口に 整合するように位置決めされる開口を有する。開口を包 囲するようにシートに二つの分岐縁が形成され、一方の 分岐縁は空所へ向かって延在し、他方の分岐縁はハウジ ングから外向きに延在する。細長いシャフトが開口内に 滑動可能に配置され、その一方の端部は空所内に延在 し、他方の端部はハウジングから外向きに延在して往復 駆動機構に連結される。開口はシャフトの横断面形状と 同じ横断面形状で、同寸法形状とされる。

Pump module

Method of making a disposable cassette with negative head height fluid supply

A method of radio frequency (RF) welding of a flexible PVC sheet to a rigid copolyester carrier by holding a flexible PVC sheet and a rigid copolymer carrier together between heated RF dies. A predetermined temperature differential is maintained between the RF dies, with the flexible sheet side at a higher temperature than the rigid carrier side and adjusted so that a weld plane is established along the interface between the PVC and the copolyester. An RF weld signal is passed through the first and second RF dies and the PVC and copolyester therebetween, so that the flexible PVC sheet and the copolyester rigid carrier partially melt and become welded together at the weld plane.

Method of operating a peristaltic pump

Operating device, method for operating an operating device, diaphragm pump having an operating device and a diaphragm pump device, and a blood treatment apparatus having a diaphragm pump

An actuating device mechanically controls a membrane pump device. The device includes a base body having a mounting face for a membrane pump device and through which a control fluid line passes that extends from a control fluid port to a control fluid opening that opens at the mounting face. A control fluid valve arranged in the control fluid line influences a cross-section of the control fluid line and has an adjustment device that has a fluid actuator arranged on the mounting face. A working fluid valve influences a cross-section of a working fluid line that passes through the base body. The control fluid valve and the working fluid valve are electrically connected to a control device that electrically controls the control fluid valve and the working fluid valve. Moreover, a membrane pump is provided that has an actuating device and a membrane pump device.

Method of operating a peristaltic pump

Process for operating a peristaltic pump

Método de funcionamento de uma bomba peristáltica

OPERATING PROCEDURE OF A PERISTALTIC PUMP.

Procedimiento para accionar una bomba peristáltica (10) que presenta un cabezal de rodillos (14) que soporta una pluralidad de rodillos (16), que comprende las etapas siguientes: (a) conectar operativamente el cabezal de rodillos en contacto con un canal de fluido flexible (26); (b) girar el cabezal de rodillos de modo que la pluralidad de rodillos entren en contacto con el canal de fluido y causen el flujo del fluido a través del canal de fluido; (c) determinar continuamente la posición de los rodillos; (d) detener los rodillos en una posición basada en la posición de los rodillos determinada continuamente. caracterizado porque el canal de fluido flexible está provisto de un casete (18), presentando el casete un cuerpo (22) y una lámina (20) fijada al cuerpo, conteniendo la lámina por lo menos un canal flexible moldeado (26), y porque detener los rodillos comprende parar por lo menos un rodillo (16) en una posición de parada cerca de un puerto de entrada al canal de fluido para cerrar pinzando el canal de fluido (26) y para actuar como válvula de cierre para evitar que entre fluido en el canal, o para aislar el canal de fluido de presiones elevadas transitorias y evitar que entren picos de presión transitoria en el canal de fluido. Method for operating a peristaltic pump (10) having a roller head (14) that supports a plurality of rollers (16), comprising the following steps: (a) operatively connect the roller head in contact with a fluid channel flexible (26); (b) rotate the roller head so that the plurality of rollers come into contact with the fluid channel and cause the fluid to flow through the fluid channel; (c) continuously determine the position of the rollers; (d) stop the rollers in a position based on the position of the rollers determined continuously. characterized in that the flexible fluid channel is provided with a cassette (18), the cassette having a body (22) and a sheet (20) fixed to the body, the sheet containing at least one molded flexible ...

Method of operating a peristaltic pump

Method of operating a peristaltic pump

Peristaltic pump

Peristaltic pump with rotor position sensing employing a reflective object sensor

The position of a rotating pump element is sensed by a reflective object sensor 406 in association with a view disk 412 coupled to the operative element for rotation in synchrony with the operative element. The view disk 412 has first 422 and second 420 surface portions that present themselves in succession to the reflective object sensor during rotation of the operative element. The first surface portion 422 is spaced at or near the optical focus of the reflective object sensor, whereas the second surface portion 422 is not. The reflective object sensor 406 thus generates different outputs, depending upon whether the first surface or second surface portions are in optical alignment with the reflective object sensor.