УСТРОЙСТВО (ВАРИАНТЫ) ДЛЯ НЕЗАВИСИМОГО УПРАВЛЕНИЯ УСИЛИЯМИ ДЛЯ ПОСАДКИ В ПОВОРОТНЫХ КЛАПАНАХ

FIELD: machine building.SUBSTANCE: present invention describes versions of methods and devices for independent control of force for landing in a rotary valve. Version of the device comprises a rotary valve having a flow control element and a double action drive operatively connected to the rotary valve. Drive has the first and the second holes to receive the control fluid medium under pressure to change the drive position. This version of the device additionally comprises a valve controller functionally connected to the drive to regulate the controlled fluid medium under pressure in response to the position of the rotary valve. Version of the device additionally comprises a pressure limiter functionally connected to the valve controller and connected to the first hole of the drive fluidly. Pressure limiter is designed to reduce pressure of fluid medium, which is under pressure and supplied to first hole of drive, to reduce the force for the flow control element seating when the rotary valve is in the closed position.EFFECT: disclosed is a device (versions) for independent control of forces for landing in rotary valves.20 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 736 443 C2 (51) МПК F16K 31/04 (2006.01) F16K 31/122 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F16K 31/04 (2020.02); F16K 31/122 (2020.02) (21)(22) Заявка: 2018126520, 21.12.2016 (24) Дата начала отсчета срока действия патента: Дата регистрации: (73) Патентообладатель(и): ФИШЕР КОНТРОЛЗ ИНТЕРНЕШНЕЛ ЛЛС (US) 17.11.2020 21.12.2015 US 14/977,104 (43) Дата публикации заявки: 23.01.2020 Бюл. № 3 (56) Список документов, цитированных в отчете о поиске: US 8413486 B1, 09.04.2013. US 2010083651 A1, 08.04.2010. RU 2365886 C2, 27.08.2009. (45) Опубликовано: 17.11.2020 Бюл. № 32 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 23.07.2018 2 7 3 6 4 4 3 Приоритет(ы): (30) Конвенционный приоритет: R U 21.12.2016 (72) Автор(ы): КИНСЕР, ...

Hydraulic drive system of construction machine

Improvements in or relating to tipping bodies for commercial vehicles

... 837,871. Hydraulic apparatus. TELEHOIST Ltd. Dec. 22, 1958 [Jan. 8, 1958], No. 701/58. Class 69 (2). An hydraulic mechanism for tipping the body 2 of a commercial vehicle comprises an hydraulic ram 5 and a flow control valve 17 which is actuated by the tipping movement of the body as the latter is nearing its fully tipped position to cause a pressure rise in the cylinder 5a of the ram whereby the latter is caused to act as a dashpot for the end portion of its travel to clamp the final movement of the body to its fully tipped position. The ends of the ram 5, which is pivoted to the chassis 1 of the vehicle and to a linkage 6, in turn, pivoted to a shaft 7 and to the body 2, are supplied with liquid pressure from a pump 11 alternatively by a manually controlled valve 13. During the tipping operation, the supply from the pump 11 passes to the lower end of the ram and to a pilot valve 8, and from the other end of the ram through the flow control valve 17 which, during the initial movement of ...

Controller unit and liquid-pressure driving system

This controller unit is provided to a hydraulic drive system for an operating machine that moves a structure using an actuator by supplying a hydraulic fluid to the actuator. The controller unit has: a gyro sensor that outputs a signal corresponding to the operation speed of the structure; and a controller that controls, on the basis of the signal corresponding to the operation speed of the structure, said operation signal being outputted from the gyro sensor, the flow rate of the hydraulic fluid to be supplied to the actuator. The controller is attached to the structure, and the gyro sensor is incorporated in the controller.

Hydraulic system for a forming machine

Hydrauliksystem für eine Formgebungsmaschine mit zumindest einer Hydraulikleitung (7, 8), geeignet zur Verbindung mit einem hydraulischen Verbraucher (5), wenigstens einer Pumpe (2), welche zur Druckbeaufschlagung eines Hydraulikfluids in der zumindest einen Hydraulikleitung (7, 8) ausgebildet ist, sowie einem Sicherheitsventil (6), welches ein Zurückfließen des Hydraulikfluids von einem verbraucherseitigen Teilstück (8) der Hydraulikleitung in ein pumpenseitiges Teilstück (7) der Hydraulikleitung verhindert, wobei wenigstens eine Umgehungsleitung (9) vorgesehen ist, welche das verbraucherseitige Teilstück (8) und das pumpenseitige Teilstück (7) der Hydraulikleitung unter Umgehung des Sicherheitsventils (6) miteinander verbindet und in welcher eine Drosselvorrichtung in Form eines geregelten oder gesteuerten Ventils (16) angeordnet ist, wobei das Ventil (16) ein gedrosseltes Zurückfließen des Hydraulikfluids von dem verbraucherseitigen Teilstück (8) in das pumpenseitige Teilstück (7) der ...

Inertia body drive device

CONTROL VALVE, DERRICKING CYCLINDER AND WORKING METHOD THEREOF, AERIAL WORK PLATFORM

Provided are a control valve, a derricking cylinder and a working method thereof, and an aerial work platform, relating to the field of aerial work. The control valve of the derricking cylinder includes a first balance valve provided on the oil circuit between the first port G and the second port F, and a second balance valve provided on the oil circuit between the third port H and the fourth port E; and a switch valve in series with the first balance valve is further provided on the oil circuit between the first port G and the second port F. When the first balance valve fails, it can still prevent the oil from returning from the oil circuit between the first port G and the second port F by cutting off the switch valve, and the control valve has high operational reliability. The control valve seals the high-pressure oil in the rodless cavity of the derricking cylinder through the double insurance of the first balance valve and the second balance valve, and the lifting arm remains at rest ...

Dispositif d'actionnement par fluide sous pression des porte-outils d'une bourreuse pour voies ferrées

Hydraulischer Mechanismus mit einem Tauchkolben zur Betätigung der Kippmulde eines Fahrzeuges

Hydraulic drive for a working machine, in particular for a slewing gear.

Die Erfindung betrifft eine hydraulische Antriebsschaltung zum Antrieb einer Arbeitsmaschine, insbesondere zum Antrieb eines Drehwerkes, mit wenigstens einer Hydraulikpumpe (1), die über wenigstens ein Wegeventil (3) mit wenigstens einem Hydromotor (4) über zwei Speisedruckleitungen (A, B) verbunden ist und eine Druckbegrenzungsfunktion zur Begrenzung der positiven und negativen Beschleunigung des Hydromotors (4) aufweist, wobei die Druckbegrenzungsfunktion durch wenigstens ein Druckbegrenzungssystem (20) verwirklicht ist, das wenigstens eine Hauptstufe umfasst, die bei Überschreiten eines Grenzdruckes eine Entlastung einer Speisedruckleitung in die zweite Speisedruckleitung ermöglicht, sowie wenigstens eine elektrisch ansteuerbare Vorstufe zur Einstellung des Grenzdruckes aufweist. The invention relates to a hydraulic drive circuit for driving a work machine, in particular for driving a slewing gear, with at least one hydraulic pump (1) which is connected via at least one directional control valve (3) with at least one hydraulic motor (4) via two feed pressure lines (A, B) and a pressure limiting function for limiting the positive and negative acceleration of the hydraulic motor (4), wherein the pressure limiting function is realized by at least one pressure limiting system (20) comprising at least one main stage, which allows relief of a feed pressure line in the second feed pressure line when a limiting pressure is exceeded , And at least one electrically controllable precursor for adjusting the limit pressure has.

Single acting pneumatic piston-cylinder unit

Hydraulic device for tractor

MULTIPLE CONTROL HYDRAULIC CIRCUIT

Shovel

A shovel may be provided with a main pump, hydraulic actuators including a swing hydraulic motor, a control valve that controls a flow of a working oil between the main pump and the hydraulic actuators, and an accumulator part that releases the working oil between the main pump and the control valve, and between the swing hydraulic motor and the control valve. The accumulator part may release the working oil at an upstream of the main pump.

AUTOMATIC RELEASE AND CENTERING DEVICE

An automatic release and centering device for a double acting hydraulic cylinder, the device includes a housing, an actuating rod mounted for axial motion within the housing and being connected to the control valve for the hydraulic cylinder, the actuating rod being movable in either direction from a neutral position to an actuated position, a pair of detent members mounted on the rod, each detent member being connected to move in one direction with the rod, a detent assembly positioned to engage and hold a detent member in an actuated position, a spring positioned to bias the detent members and the rod to the neutral position and a pressure actuated release system to release the detent assembly from the detent member.

Method for controlling a work system that can be operated using fluid

HYDRAULIC CIRCUIT FOR A SWING SYSTEM IN A MACHINE

Three position stopping cylinder for driving latch key, has pusher for pushing main piston from stroke end back to intermediate stopping position, and for stopping main piston at intermediate stopping position

The three position stopping cylinder (21A) includes a pusher (33) for pushing a main piston (26) from a stroke end back to an intermediate stopping position, and for stopping the main piston at the intermediate stopping position. A spring (34a) is used to displace the pusher to the intermediate stopping position.

Steuersystem eines Stuhls

Hydraulic drive system of construction machine

Control system for an excavator

In a control system for automatically controlling the operation of actuators of an excavator, flow rate of hydraulic fluid from the main hydraulic pumps to each actuator is automatically controlled on manipulation of controls levers/pedals for initiating or stopping movement of the actuators. An electronic controller receives signals corresponding to lever manipulation theta i, also to positions Si of the actuators, and determines whether the levers are in an acceleration or reduction mode. If the mode is one if acceleration, output velocities Vf are produced, each of which corresponds to an acceleration velocity Va, to a maximum equal to a predetermined value Vi set in accordance with lever position. If the mode is one of reduction, each output velocity Vf corresponds with a reduction velocity Vr, to a minimum equal to the same predetermined value Vi. The output velocities are used to produce values Qi corresponding to the required flow rates of the main hydraulic pumps. ...

Improvements relating to control of hydraulic power means

... 695,218. Hydraulic machines. ALDOUS & CAMPBELL, Ltd. Oct. 26, 1951 [Dec. 1, 1950], No. 29493/50. Addition to 623,137. Class 69(ii) [Also in Group XXX] A control system according to the parent Specification, comprises a two way hydraulic valve 6 included in the system between the servo-operated main valve C and the working cylinder A and arranged to be operated by the working ram A 1 through tappet and endless rope or equivalent mechanism to prevent abnormal overrun of the working ram. The valve 6 comprises piston valve members 2, 3 slidable with a control rod 1 in a bore formed by two sleeves 4, 5 which form externally two annular spaces 7, 8 communicating through spring loaded inlet and exhaust valves respectively with connected passages 9, 10 and through radial ports 14, 15 in the sleeves 4, 5 controlled by the valve members 2, 3, with the bore between the ports, which is connected to a flanged port 13 connected to the cylinder A, the passage 9 being connected to the valve C.

CONTROL SYSTEM OF A CHAIR

Hydraulic system for a forming machine

Hydrauliksystem für eine Formgebungsmaschine mit zumindest einer Hydraulikleitung (7, 8), geeignet zur Verbindung mit einem hydraulischen Verbraucher (5), wenigstens einer Pumpe (2), welche zur Druckbeaufschlagung eines Hydraulikfluids in der zumindest einen Hydraulikleitung (7, 8) ausgebildet ist, wenigstens einem Ventil, welches zwischen einem verbraucherseitigen Teilstück (8) und einem pumpenseitigen Teilstück (7) der Hydraulikleitung angeordnet ist, wobei das Ventil, welches zwischen dem verbraucherseitigen Teilstück (8) und dem pumpenseitigen Teilstück (7) der Hydraulikleitung angeordnet ist, ein gesteuertes oder geregeltes Ventil (16) ist, welches dazu ausgebildet ist, ein Zurückfließen des Hydraulikfluids von dem verbraucherseitigen Teilstück (8) der Hydraulikleitung in das pumpenseitige Teilstück (7) der Hydraulikleitung zu steuern oder zu regeln , wobei ein Sensor vorgesehen ist, durch welchen ein für die Drehzahl der wenigstens einen Pumpe (2) charakteristisches Signal erfassbar ...

Single acting pneumatic piston-cylinder unit

METHOD TO AUTOMATICALLY CONTROL THE STEERING MOTOR OF AN EXCAVATOR.

CONTROL DEVICE FOR WORK MACHINE ON CONSTRUCTION VEHICLE AND CONTROL METHOD

Disclosed is a control device for a work machine on a construction vehicle such that a bucket cylinder is stopped at a target position, with high accuracy achieved in a bucket cylinder length, and with shock held down to a low level. A bucket cylinder length detection section (101) references a cylinder length detection table (102) on the basis of a boom angle and a bell crank angle, thereby detecting a bucket cylinder length. A bucket attitude control section (103) controls the bucket cylinder length so that a target position will be reached. Feedback control is performed until a set value which is set short of a target value is reached. After the bucket cylinder length reaches the set value, open loop control is performed until the target value is reached.

ARRANGEMENT FOR CONTROLLING A HYDRAULICALLY DRIVEN MOTOR

The present invention relates to an arrangement for controlling a hydraulically driven motor, forming part of a hydraulic system in which hydraulic fluid under pressure forms a main flow through a main duct in which the motor is connected. The motor drives a varying load, and one or more valves (7) are adapted for controlling the hydraulic fluid flow through the motor on the one hand during operation and on the other hand for starting and stopping of the motor. One of the valves consists of a flow control valve (7) which is connected in the main duct (1) downstream of the outlet of the motor, and the flow control valve (7) is integrated with the motor housing (50).

3-position stopping cylinder

A pusher which has a stroke shorter than that of a piston at either position on a head side or a rod side in a cylinder main body and which serves as both means for pushing the piston from a stroke end back to an intermediate stopping position and means for stopping the piston at the intermediate stopping position is disposed so as to be movable independently from the piston, and pressing means for causing the pusher to displace to the intermediate stopping position is provided.

Methods and appratus for independently controlling seating forces in rotary valves

Example methods and apparatus independently control the seating force in a rotary valve. An example apparatus includes a rotary valve having a flow control member and a dual-acting actuator operatively coupled to the rotary valve. The actuator has first and second ports to receive a pressurized control fluid to change a position of the actuator. The example apparatus further includes a valve controller operatively coupled to the actuator to control the pressurized control fluid in response to a position of the rotary valve. The example apparatus further includes a pressure limiter operatively coupled to the valve controller and fluidly coupled to the first port of the actuator. The pressure limiter is to reduce a pressure of the pressurized fluid provided to the first port of the actuator to reduce a seating force of the flow control member when the rotary valve is in a closed position.

Patent RU2018126520A3

`7ВУ’” 2018126520`” АЗ Дата публикации: 25.05.2020 Форма № 18 ИЗПМ-2011 Федеральная служба по интеллектуальной собственности Федеральное государственное бюджетное учреждение 5 «Федеральный институт промышленной собственности» (ФИПС) ОТЧЕТ О ПОИСКЕ 1. . ИДЕНТИФИКАЦИЯ ЗАЯВКИ Регистрационный номер Дата подачи 2018126520/12(042128) 21.12.2016 РСТ/О$2016/067907 21.12.2016 Приоритет установлен по дате: [ ] подачи заявки [ ] поступления дополнительных материалов от к ранее поданной заявке № [ ] приоритета по первоначальной заявке № из которой данная заявка выделена [ ] подачи первоначальной заявки № из которой данная заявка выделена [ ] подачи ранее поданной заявки № [Х] подачи первой(ых) заявки(ок) в государстве-участнике Парижской конвенции (31) Номер первой(ых) заявки(ок) (32) Дата подачи первой(ых) заявки(ок) (33) Код страны 1. 14/977,104 21.12.2015 05 Название изобретения (полезной модели): [Х] - как заявлено; [ ] - уточненное (см. Примечания) СПОСОБЫ И УСТРОИСТВА ДЛЯ НЕЗАВИСИМОГО УПРАВЛЕНИЯ УСИЛИЯМИ ДЛЯ ПОСАДКИ В ПОВОРОТНЫХ КЛАПАНАХ Заявитель: ФИШЕР КОНТРОЛЗ ИНТЕРНЕШНЕЛ ЛЛС, 0$ 2. ЕДИНСТВО ИЗОБРЕТЕНИЯ [Х] соблюдено [ ] не соблюдено. Пояснения: см. Примечания 3. ФОРМУЛА ИЗОБРЕТЕНИЯ: [Х] приняты во внимание все пункты (см. Примечания) [ ] приняты во внимание следующие пункты: [ ] принята во внимание измененная формула изобретения (см. Примечания) 4. КЛАССИФИКАЦИЯ ОБЪЕКТА ИЗОБРЕТЕНИЯ (ПОЛЕЗНОЙ МОДЕЛИ) (Указываются индексы МПК и индикатор текущей версии) Е16К 31/04 (2006.01) Е1бК 31/122 (2006.01) 5. ОБЛАСТЬ ПОИСКА 5.1 Проверенный минимум документации РСТ (указывается индексами МПК) Е 16 р 31/02-31/04; Е 16 К 31/122; СОТГ 1/10, 5/00; С ОТМ 33/18. 5.2 Другая проверенная документация в той мере, в какой она включена в поисковые подборки: 5.3 Электронные базы данных, использованные при поиске (название базы, и если, возможно, поисковые термины): СМГРА, РЕРАТБ пес, ЕВЗСО, Ебрасепеё боозе, ]-Р1а Рав КТРК$, РАТЕМТЗСОРЕ, Раеагсв, Оцез{е]-Огфи, КОРТО, ОРТО 6. ДОКУМЕНТЫ, ...

СПОСОБЫ И УСТРОЙСТВА ДЛЯ НЕЗАВИСИМОГО УПРАВЛЕНИЯ УСИЛИЯМИ ДЛЯ ПОСАДКИ В ПОВОРОТНЫХ КЛАПАНАХ

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2018 126 520 A (51) МПК F16K 31/163 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2018126520, 21.12.2016 (71) Заявитель(и): ФИШЕР КОНТРОЛЗ ИНТЕРНЕШНЕЛ ЛЛС (US) Приоритет(ы): (30) Конвенционный приоритет: 21.12.2015 US 14/977,104 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 23.07.2018 R U (43) Дата публикации заявки: 23.01.2020 Бюл. № 3 (72) Автор(ы): КИНСЕР, Эндрю, Джон (US), УАЙАТТ, Майкл, Аллен (US), ДЖЕКСОН, Трентон, Ф. (US) (86) Заявка PCT: (87) Публикация заявки PCT: WO 2017/112720 (29.06.2017) R U (54) СПОСОБЫ И УСТРОЙСТВА ДЛЯ НЕЗАВИСИМОГО УПРАВЛЕНИЯ УСИЛИЯМИ ДЛЯ ПОСАДКИ В ПОВОРОТНЫХ КЛАПАНАХ (57) Формула изобретения 1. Устройство, содержащее: поворотный клапан, имеющий элемент регулирования потока; привод двойного действия, функционально связанный с поворотным клапаном и имеющий первое и второе отверстия для приема регулирующей текучей среды, находящейся под давлением, для изменения положения привода двойного действия; контроллер клапана, функционально связанный с приводом двойного действия, для управления регулирующей текучей средой, находящейся под давлением, в ответ на положение поворотного клапана; и ограничитель давления, функционально связанный с контроллером клапана и соединенный по текучей среде с первым отверстием для снижения давления текучей среды, находящейся под давлением, подаваемой в первое отверстие, для уменьшения усилия для посадки элемента регулирования потока, когда поворотный клапан находится в закрытом положении. 2. Устройство по п. 1, в котором давление регулирующей текучей среды, находящейся под давлением, подаваемой во второе отверстие, обеспечивает усилие для открытия элемента регулирования потока, причем эта усилие для открытия больше, чем усилие для посадки. 3. Устройство по любому из предшествующих пунктов, в котором ограничитель давления встроен в контроллер клапана. Стр.: 1 A 2 0 1 8 1 2 6 5 2 0 A Адрес для ...

Door opener with pneumatically-damped end stroke, includes sensor and controller to determine actual damping forces employed

A sensor (8, 9) continuously detects piston (6) position, sending an actual position signal to the electronic controller (1) input. This is compared with an externally-adjustable desired position. On reaching this position, a series of opposing, width-modulated pulses are transmitted, causing end-damping. The pulse width controls the damping force through the control unit. The stored value controlling this force can be varied externally.

Ballast packing machine for railway lines

... 864,482. Hydraulic machines. MATERIEL INDUSTRIEL S.A., and CONSTRUCTIONS MECANIQUES SOC. ANON. RENENS. Jan. 15, 1958 [Jan. 29, 1957], No. 1460/58. Class 69 (2). [Also in Group XXVIII] In an hydraulically operated machine for packing ballast under railway sleepers by means of tools reciprocated towards and away from each other, the limit of the opening (return) stroke of the tools is adjustable. As shown in Fig. 1 tool actuating pistons 3 are supplied with liquid by a pump 6 through a control valve 20. When valve 20 is moved to a position F, liquid is supplied through lines 17, 19 to both faces of the pistons for a forward stroke. In a position A of the valve liquid is supplied through line 17 for a return stroke, liquid in space 14 passing to exhaust through lines 16, 12, the line 19 being blocked by the valve so that the piston is halted when it covers line 16. In position B line 19 is opened to exhaust to increase the length of the return stroke. In the modification shown in Fig. 2 a ...

FLUID OPERATION DRIVE AS WELL AS PROCEDURE FOR THE CONTROLLING OF THE SAME

FLUID OPERATION DRIVE AS WELL AS PROCEDURE FOR THE CONTROLLING OF THE SAME

SINGLE ACTING PNEUMATIC PISTON-CYLINDER UNIT

Pneumatic piston-cylinder apparatus of single acting type, which performs a working stroke in one working direction and which is returned to the initial position for the working stroke with any external supply of compressed air, and comprising a cylinder part having a cylinder jacket (1), a front end (2) and a rear end (3), and a piston (5) which is reciprocatable in the cylinder, and in which means (39) for supply of compressed air are connected only to the rear end (3), and in which the cylinder (1, 2, 3) is formed with means (10, 25, 4) for draining the air from the unloading side (26) of the piston (5) during the working stroke of the piston, and means (4, 9, 26, 29, 30) for building up a reserve supply of compressed air at the unloading side (26) of the piston (5) close to the end of the working stroke, which pressure is utilized for returning the piston to its initial position for working stroke.

For the motor of the vehicle with the control line of the core of the valve

Rotary type construction machinery

CONTROL SYSTEM TO AUTOMATICALLY CONTROL ACTUATING MEANS OF AN EXCAVATOR.

ROTARY HEAD OF ELECTROSTATIC PULVERIZATION OF LIQUID PRODUCTS ENTRAINEE BY A HYDRAULIC ENGINE HAS HIGH SPEED OF ROTATION

Control system to automatically notify the overhead of an excavator.

HEAVE COMPENSATOR

Device of actuation by fluid under pressure of the tool holders of bourreuse for railways

Control device automatically to prevent the overload of a general purpose excavator

L'invention concerne un système de commande pour une excavatrice comportant des moyens d'actionnement (8, 10, 12, 14, 16). Afin de prévenir l'opérateur d'une surcharge du matériau qui doit être levé, on détecte le poids (150) et/ou un angle d'inclinaison (151) de la cabine de l'excavatrice, et on avertit l'opérateur par un bruitteur (133) et une lampe d'alarme (154). L'opération de levage de l'excavatrice est arrêtée indépendamment des manœuvres de l'opérateur dans le cas où est détectée une surcharge qui dépasse un niveau susceptible de provoquer un basculement de l'excavatrice. The invention relates to a control system for an excavator comprising actuating means (8, 10, 12, 14, 16). In order to prevent the operator from overloading the material to be lifted, the weight (150) and / or an inclination angle (151) of the excavator cabin is detected, and the operator is warned by a buzzer (133) and an alarm lamp (154). The lifting operation of the excavator is stopped independently of the maneuvers of the operator in the event that an overload is detected which exceeds a level liable to cause the excavator to tip over.

INERTIA BODY DRIVE DEVICE

HYDRAULIC SYSTEM FOR CONSTRUCTION MACHINERY

Disclosed is a hydraulic system for performing land preparation works by means of a simultaneous boom-up and arm-in operation. The hydraulic system according to the present invention includes: an arm cylinder and a boom cylinder that are connected to first and second hydraulic pumps, respectively; a first boom control valve that is disposed in the discharge flow path of the second hydraulic pump; a second boom control valve that is disposed in the discharge flow path of the first hydraulic pump and causes the working fluid of the first hydraulic pump to converge with the working fluid which is supplied from the second hydraulic pump to the boom cylinder; a first arm control valve that is disposed in the discharge flow path of the first hydraulic pump; a second arm control valve that is disposed in the discharge flow path of the second hydraulic pump and causes the working fluid of the second hydraulic pump to converge with the working fluid which is supplied from the first hydraulic pump to the arm cylinder; a recycle valve that is disposed in the flow path between the working fluid inlet port of the first arm control valve and a hydraulic tank; and a second boom control valve spool having a parallel pressure section in which the boom-up pilot pressure does not increase with respect to the boom-up strokes during the simultaneous boom-up and arm-in operation.

Regulator for regulated adjustment of a hydraulic actuator

Eine Regeleinrichtung (2) zum geregelten Einstellen eines hydraulischen Stellgliedes (1) weist ein erstes und ein zweites Hydraulikventil (3, 4) und eine Steuereinrichtung (5) auf. Einem ersten Arbeitsraum (7) des hydraulischen Stellgliedes (1) ist über das erste Hydraulikventil (3) und eine Hydraulikpumpe (6) eine Hydraulikflüssigkeit (8) zuführbar ist. Die Hydraulikflüssigkeit (8) ist über das zweite Hydraulikventil (4) aus dem ersten Arbeitsraum (7) in einen Tank (9) ableitbar. Die Steuereinrichtung (5) ermittelt zum geregelten Einstellen des hydraulischen Stellgliedes (1) für das erste und das zweite Hydraulikventil (3, 4) jeweils ein eigenes Steuersignal (C1, C2) und gibt das jeweilige Steuersignal (C1, C2) an das jeweilige Hydraulikventil (3, 4) aus.

Druckluftaufbereitungseinrichtung und Verfahren zum Betreiben einer solchen

Eine Druckluftaufbereitungseinrichtung (10) für Schienenfahrzeuge oder Nutzfahrzeuge weist einen Drucklufteingang (12), an den ein Luftverdichter (14) anschließbar ist, einen Druckluftausgang (18), der über eine Druckluftleitung (16) mit dem Drucklufteingang (12) verbunden ist, und eine in der Druckluftleitung (16) angeordnete Lufttrocknungseinrichtung (22) auf. Wenn der Luftverdichter (14) abgeschaltet wird, wird die Druckluftleitung (16) stromauf der Lufttrocknungseinrichtung (22) entlüftet, sodass der Luftverdichter (14) beim Wiederanlauf gegen einen reduzierten Gegendruck starten kann.

Hydraulic drive system for construction machine

Improvements relating to fluid-pressure circuits

... 480,743. Regulating reciprocating pumps ; pneumatic single - stroke apparatus. VEREINIGTE DEUTSCHE METALLWERKE AKT. - GES. Sept. 11, 1937, No. 24819. Convention date, Sept. 11, 1936. [Classes 8 (i), 8 (ii), and 102 (i)] [Also in Group XXIX] A fluid-pressme circuit having pressure source, receiving means, a non-return valve therebetween, and a byepass valve on the source side of the non-return valve and , opened by a piston operated by the pressure on the receiver side of the non- return valve is characterized by the provision of a spring- urged push - rod separate from, and interposed between, the piston and the byepass valve, to secure positive opening without , " hammer " or hesitancy of the latter. The rod il of the piston i is axially bored to contain a push rod i<2> pressed outwardly by a spring p and having a stop collar to limit its inward movement; the piston i is acted on by a return spring k.

Hydraulic drive system for construction machine

CONTROL VALVE, DERRICKING CYLINDER AND WORKING METHOD THEREOF, AERIAL WORK PLATFORM

Provided are a control valve, a derricking cylinder and a working method thereof, and an aerial work platform, relating to the field of aerial work. The control valve of the derricking cylinder includes a first balance valve provided on the oil circuit between the first port G and the second port F, and a second balance valve provided on the oil circuit between the third port H and the fourth port E; and a switch valve in series with the first balance valve is further provided on the oil circuit between the first port G and the second port F. When the first balance valve fails, it can still prevent the oil from returning from the oil circuit between the first port G and the second port F by cutting off the switch valve, and the control valve has high operational reliability. The control valve seals the high-pressure oil in the rodless cavity of the derricking cylinder through the double insurance of the first balance valve and the second balance valve, and the lifting arm remains at rest ...

DRIVE METHOD AND DRIVE DEVICE FOR FLUID PRESSURE CYLINDER

用于对流体压力缸(12)进行驱动的驱动装置(10)具有：气体供给源(52)，该气体供给源供给气体；切换阀(14)，该切换阀对所述气体相对于所述流体压力缸(12)的供给/排出状态进行切换；旁通配管(20)，该旁通配管将所述流体压力缸(12)的盖侧缸室(16)和杆侧缸室(18)连接；以及旁通切换阀(22)，该旁通切换阀对所述旁通配管(20)中的气体的流通状态进行切换。而且，在流体压力缸(12)的复原工序中，通过使旁通切换阀(22)处于打开状态，而使盖侧缸室(16)的气体通过旁通配管(20)向杆侧缸室(18)供给。

In the hydraulic system of the rotary motor and the hydraulic system and control method

LIQUID PRESSURE MOTOR

본 발명의 목적은, 액압 모터 기구를 정지시킬 때에, 액압 모터 기구로부터 토출되는 액체의 압력 변동(압력 진동)을 억제함과 더불어, 정지 시의 쇼크를 종래보다 저감하는 것이 가능한 브레이크 구성을 구비한 액압 모터를 제공하는 것이다. 유압 모터(100)는, 릴리프 밸브(2)의 배압실(21)에 압유를 도입하기 위한 파일럿 통로(54)에 접속되어, 배압실(21)을 탱크(102)에 연통시키는 제1 전환 위치(3a)와, 파일럿 통로(54)를 배압실(21)에 연통시키는 제2 전환 위치(3b)를 갖는 전환 밸브(3)를 구비하고 있다. 당해 전환 밸브(3)에 의해, 유압 모터 기구(1)의 구동 시에는, 유압 모터 기구(1)에 공급되는 압유를 파일럿 통로(54)를 통해 배압실(21)에도 도입하고, 유압 모터 기구(1)의 브레이크 작동 시에는, 파일럿 통로(54)의 압이 소정압 이하가 되면, 배압실(21)을 탱크(102)에 접속하는 구성을 취한다. SUMMARY OF THE INVENTION An object of the present invention is to provide a brake configuration capable of suppressing pressure fluctuations (pressure vibration) of liquid discharged from a hydraulic motor mechanism when stopping the hydraulic motor mechanism, and reducing shocks at the time of stopping than in the prior art. It is to provide a hydraulic motor. The hydraulic motor 100 is connected to a pilot passage 54 for introducing pressure oil into the back pressure chamber 21 of the relief valve 2, and the first switching position for communicating the back pressure chamber 21 to the tank 102. The switching valve 3 which has 3a and the 2nd switching position 3b which connects the pilot path 54 to the back pressure chamber 21 is provided. When the hydraulic motor mechanism 1 is driven by the switching valve 3, the pressure oil supplied to the hydraulic motor mechanism 1 is also introduced into the back pressure chamber 21 through the pilot passage 54, thereby providing the hydraulic motor mechanism. At the time of brake operation of (1), when the pressure in the pilot passage 54 becomes equal to or less than the predetermined pressure, the back pressure chamber 21 is connected to the tank 102.

Hydraulic system for hydro-mechanical machines comprising rotary mechanism

This disclosure relates to a hydraulic system for a hydro-mechanical machine comprising a rotary mechanism. The hydraulic system includes a primary accumulator configured to receive and store high-pressure fluid in response to stopping of the rotary mechanism. A control system coupled to the primary accumulator through a hydraulic supply circuit is configured to enable passage of the high-pressure fluid stored in the primary accumulator to a rotary control valve configured to control the rotary mechanism, through the hydraulic supply circuit, based on a predefined pressure threshold associated with the primary accumulator. A secondary accumulator coupled to the primary accumulator and the control system via the hydraulic supply circuit is configured to store surplus high-pressure fluid provided by the primary accumulator through the hydraulic supply circuit.

Compressed air preparation device and method for operating same

The invention relates to a compressed air preparation device for rail vehicles or utility vehicles, comprising a compressed air inlet, to which an air compressor can be connected, a compressed air outlet, which is connected to the compressed air inlet via a compressed air duct, and an air drying device arranged in the compressed air duct. In the event that the air compressor is switched off, the compressed air duct is vented upstream of the air drying device so that, at restart, the air compressor can start against a reduced counterpressure.

FLOW REGULATOR VALVE WITH SHUT OFF VALVE

PURPOSE: To improve fluid shutting-off function without complicating constitution of a shut-off valve more than necessary in the case captioned flow regulator valve capable of selecting the feed speed of a movable member available for a machine tool to be high, medium and low. CONSTITUTION: When a shut-off valve is operated mechanically by one step with a step portion 91a of a cam plate 91, a poppet 52 closes a pilot path 14 and a poppet 51 closes a main path 13 to shut off satisfactorily fluid, so that flow directed from a second port 12 to a first port 11 can be accurately adjusted by the first variable throttle valve 30. Also, when the shut-off valve is operated by two steps with the lower end 91b of the cam plate 91, a valve spool 53 closes further a bypass path 16 to shut off satisfactorily fluid, so that fluid flow directed from the second port 12 to the first port 11 is accurately adjusted by both throttle valves 30, 40. COPYRIGHT: (C)1982,JPO&Japio ...

УСТРОЙСТВО ДЛЯ ПОДГОТОВКИ СЖАТОГО ВОЗДУХА И СПОСОБ ЭКСПЛУАТАЦИИ УКАЗАННОГО УСТРОЙСТВА

FIELD: machine building. SUBSTANCE: compressed air preparation device (10), in particular for rail vehicles or trucks, includes compressed air inlet point (12) configured to be connected to air pump (14), compressed air outlet (18) connected by pressure line (16) with compressed air inlet (12) and air dryer (22) installed in pressure line (16). When air blower (14) is off, the air discharge from pressure pipeline (16) is performed upstream air dryer (22) in order to ensure the possibility of starting air supercharger (14) at reduced counter pressure. EFFECT: compressed air preparation device (10) and improved method of operation of compressed air preparation device provide possibility of air removal from pressure pipeline to ensure possibility of starting air compressor connected to the inlet side with maximum possible counter-pressure absence. 9 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК B60T 17/00 F04B 49/02 F04B 49/06 F15B 21/04 (11) (13) 2 699 941 C1 (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК B60T 17/00 (2019.05); F04B 49/02 (2019.05); F04B 49/06 (2019.05); F15B 21/04 (2019.05) (21)(22) Заявка: 2018119716, 27.10.2016 (24) Дата начала отсчета срока действия патента: Дата регистрации: 11.09.2019 02.11.2015 DE 10 2015 118 744.2 (56) Список документов, цитированных в отчете о поиске: EP 2829744 A2, 28.10.2015. DE 102010018949 A1, 03.11.2011. DE 102006043863 A1, 03.04.2008. RU 2254249 C2, 20.06.2005. "Автотормозное и пневматическое оборудование подвижного состава рельсового транспорта", Каталог комплектующего оборудования, АСТО, Москва 2003, с. 140 141. (45) Опубликовано: 11.09.2019 Бюл. № 26 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 04.06.2018 (86) Заявка PCT: 2 6 9 9 9 4 1 R U (87) Публикация заявки PCT: WO 2017/076728 (11.05.2017) C 1 C 1 EP 2016/075889 (27.10.2016) 2 6 9 9 9 4 1 (73) Патентообладатель(и): КНОРР-БРЕМЗЕ ЗЮСТЕМЕ ФЮР ШИНЕНФАРЦОЙГЕ ...

Control system for automatically controlling actuators of an excavator

Control system for automatically controlling actuators of an excavator

SYSTEM FOR CONTROLLING A STABILISING LEG, STABILISATION DEVICE, AND VEHICLE INCLUDING A STABILISATION DEVICE

Le système de commande d'un pied stabilisateur (112) comporte un vérin hydraulique (116) et un circuit hydraulique (124) d'alimentation en fluide hydraulique du vérin hydraulique, le vérin hydraulique (116) comportant une tige de vérin (114), l'extrémité de laquelle peut être fixé le pied stabilisateur (112), et au moins une chambre hydraulique (118) commandant la position de la tige de vérin (114), le circuit hydraulique d'alimentation (124) 10 comportant une branche d'alimentation (126) de la chambre hydraulique (118) comprenant des premiers moyens (138) sélectivement activables pour empêcher un écoulement du fluide hydraulique depuis le vérin hydraulique, et des seconds moyens (130, 136) pour empêcher un écoulement du fluide hydraulique depuis le vérin hydraulique tant que la pression du fluide hydraulique dans la chambre hydraulique est inférieure une valeur de seuil prédéterminée, les seconds moyens (136) tant disposés entre les premiers moyens (138) et la chambre hydraulique (118). The stabilizer foot control system (112) comprises a hydraulic cylinder (116) and a hydraulic circuit (124) for supplying hydraulic fluid to the hydraulic cylinder, the hydraulic cylinder (116) comprising a cylinder rod (114) , the end of which the stabilizing foot (112) can be fixed, and at least one hydraulic chamber (118) controlling the position of the jack rod (114), the hydraulic supply circuit (124) 10 comprising a branch supply (126) to the hydraulic chamber (118) comprising first means (138) selectively activatable to prevent flow of hydraulic fluid from the hydraulic cylinder, and second means (130, 136) to prevent flow of hydraulic fluid from the hydraulic cylinder as long as the pressure of the hydraulic fluid in the hydraulic chamber is less than a predetermined threshold value, the second means (136) being disposed between the first means (138) and the ch hydraulic amber (118).

Hydraulic drive device for work vehicle

This hydraulic drive device for a work vehicle includes a main pump (1) of a variable displacement type or a fixed displacement type discharging pressure oil, a main flow passage (F1) for supplying pressure oil of the main pump to an actuator, a sub-pump (5) of a fixed displacement type discharging pressure oil, a sub-flow passage (F2) for making pressure oil of the sub-pump merge with the main flow passage and supplying the pressure oil to the actuator (2), a merging directional valve (6A) for connecting or cutting off the main flow passage and the sub-flow passage, a controller (30) for controlling operation of the merging directional valve, and a relief valve (7A) arranged in the sub-flow passage, in which the relief valve has a pressure override characteristic having a tendency that the relief pressure increases from a cracking pressure to a set pressure as a relief flow rate increases.

Pressure responsive hydraulic control circuit

Backhoes are useful for digging trenches, ditches, etc. However, a performance deficiency caused by the formation of voids in the hydraulic control motor occurs sometimes if the swinging mass of the backhoe is abruptly stopped by quickly moving the directional control valve to the neutral position. The present invention provides a control circuit having a charging valve for communicating pressurized fluid from the supply conduit connected to the pump to charge the makeup valves with pump discharge fluid to minimize or avoid the formation of voids when the directional control valve is moved to the neutral position to stop the swinging movement of the backhoe mechanism.

FLUID OPERATED DRIVE AND METHOD FOR CONTROL THEREOF

METHOD FOR VENTING A PNEUMATIC SYSTEM OF A VEHICLE, PNEUMATIC SYSTEM AND VEHICLE

AUSGLEICHSVORRICHTUNG FUER HUB- UND SENKBEWEGUNGEN, INSBESONDERE EINES BOHRSCHIFFES

Hydraulic drive system for construction machine

This hydraulic drive system is provided with: a hydraulic actuator; a control valve for controlling the supply and discharge of hydraulic oil to and from the hydraulic actuator; a pilot operation valve connected to an operation valve by a pair of pilot lines; an electromagnetic proportional pressure reducing valve provided to at least one of the pair of pilot lines; an operation detector for outputting an operation amount signal corresponding to the tilt angle of the operation lever of the pilot operation valve; and a control device which, immediately after the amount of variation per unit time in the operation amount signal outputted from the operation detector decreases by a value exceeding or equal to a threshold value, starts to control the electromagnetic proportional pressure reducing valve so that pressure at a pilot port of the control valve will be gradually reduced to zero by the communication between the secondary pressure port of the electromagnetic proportional pressure reducing ...

APPARATUS FOR INDEPENDENTLY CONTROLLING SEATING FORCES IN ROTARY VALVES

Apparatus for independently controlling the seating force in a rotary valve are described herein. An example apparatus includes a rotary valve having a flow control member and a dual-acting actuator operatively coupled to the rotary valve. The actuator has first and second ports to receive a pressurized control fluid to change a position of the actuator. The example apparatus further includes a valve controller operatively coupled to the actuator to control the pressurized control fluid in response to a position of the rotary valve. The example apparatus further includes a pressure limiter operatively coupled to the valve controller and fluidly coupled to the first port of the actuator. The pressure limiter is to reduce a pressure of the pressurized fluid provided to the first port of the actuator to reduce a seating force of the flow control member when the rotary valve is in a closed position.

RECIPROCATING PUMPS FOR DOWNHOLE DELIQUIFICATION SYSTEMS AND PISTONS FOR RECIPROCATING PUMPS

A piston includes a piston housing and a decompression valve disposed in the piston housing. The decompression valve includes a valve housing seated in the piston housing and a valve member moveably received by the valve housing. The valve member has a radially outer surface including an annular shoulder. In addition, the piston includes an end cap secured to the first end of the piston housing. A radially inner surface of the end cap includes an annular valve seat. The decompression valve has a closed position with the annular shoulder of the valve member engaging the valve seat of the end cap and an open position with the annular shoulder of the valve member axially spaced from the valve seat of the end cap. The piston also includes a biasing member configured to bias the decompression valve to the closed position.

Excavator

Control device automatically to order means of actuation of a general purpose excavator

Système pour commander le fonctionnement de moyens d'actionnement (6, 8, 10, 12, 14, 16) d'une excavatrice. Le mode de déplacement (6,12) des moteurs de déplacement est changé automatiquement entre deux profils pour correspondre efficacement à la charge imposée aux moteurs de déplacement (6,12). Le système de freinage (45, 49) des moteurs d'orientation (10) est commandé avec une commande temporelle ajustable. L'opération synchrone du moteur d'orientation (10) et du vérin de flèche (16) est commandée en fixant leur vitesse relative d'actionnement. Le débit de liquide hydraulique généré par les pompes hydrauliques principales (3, 4) en direction de chaque moyen d'actionnement (6, 8, 10, 12, 14, 16) est commandé automatiquement en cas de manoeuvre des leviers et/ou pédales de commande (21) pour démarrer les moyens d'actionnement (6, 8, 10, 12, 14, 16) ou pour les stopper. Le débit de liquide hydraulique pour actionner (6, 8, 10, 12, 14, 16) les vérins commande les vérins sans à-coup aux extrémités des vérins. Une opération de levage de l'excavatrice est commandée pour éviter un accident par basculement.

Arrangement and method for operating a hydraulic cylinder

A carrier comprising a hydraulic cylinder having a piston, a controller and a piston position sensor, wherein the carrier is arranged to carry an accessory through the use of the hydraulic cylinder and wherein the controller is configured to: receive piston position information; determine a direction of movement of the piston; and if the piston position equals a stop distance from an end wall of the hydraulic cylinder in the direction of movement, abort the movement.

Hydraulic cylinder with stroke end damping.

Die Erfindung betrifft einen Hydraulikzylinder (10) mit einem Kolben (12) mit Kolbenstange (14), wobei am Hydraulikzylinder zwei Hydraulikleitungen (16,18) mit einem Steuerventil (22) anschließen. Erfindungsgemäß ist in mindestens einer Hydraulikleitung (18) ein schaltbares Drosselventil (30) eingesetzt, das von einer Stellung, in der das Hydraulikfluid ungehindert strömen kann in eine Stellung, in der das Drosselventil wirksam ist, umstellbar ist.

SOLENOID FLOW CONTROL VALVE

Hydraulic drive system for construction machine

A hydraulic drive system for a construction machine is provided with: a variable capacity-type pump that supplies a working fluid to a turning motor via a turning control valve; a pair of supply/discharge lines connecting the turning motor and the turning control valve; a pair of make-up lines that have a check valve provided thereto and that connect the pair of supply/discharge lines and a tank; a turning operation device that comprises an operation lever and that outputs an operation signal corresponding to the incline angle of the operation lever; a flow rate adjustment device that adjusts the tilt angle of the pump; and a control device for controlling the flow rate adjustment device such that the tilt angle of the pump becomes larger as the operation signal output from the turning operation device becomes larger. The control device controls the flow rate adjustment device such that the discharge flow rate of the pump changes along a first specified line when turning and accelerating ...

Controller unit and liquid-pressure driving system

A liquid-pressure driving system 1B for use in a working machine (see Fig.1) configured to supply an operating liquid to a liquid-pressure motor 17, the system comprising: a direction control valve 11 configured to switch a rotation direction of the motor; and a controller 2B configured to detect a rotation velocity 62 and a rotation direction 63 of the motor using a rotation velocity detector, and a posture of a structural body of the working machine 60,61 using a posture or gyro sensor 40. The controller is configured to control a flow rate upper limit 91 and flow direction of the operating liquid supplied to the motor based on signals output from the posture and rotation velocity detectors.

Improvements in or relating to hydraulic systems

... 889,893. Hydraulic apparatus; valves. INTERNATIONAL HARVESTER CO. Sept. 2, 1960, No. 30322/60. Classes 69 (2) and 135. An hydraulic system for the earth-working implement on a tractor comprises a valve 14 which is operable to control the flow of fluid to and from a ram 10 and embodies automatically-operative means for returning the valve from a ram-operative position to a neutral position in response to a predetermined increase in pressure resulting from a restriction in the hydraulic circuit, a restrictor valve 12 which is between the control valve and the ram and has a plunger 65 displaceable to restrict the flow of pressure fluid therethrough for moving the control valve to the neutral position, and adjustable means 84 operable by a moving element of the ram to displace the plunger to the flow-restricting position when the movable element reaches a predetermined position in its travel corresponding to the setting of the adjustable means. The ram, which is connected to the earth-moving ...

HYDRAULIC CONTROL SYSTEM AND METHOD

A closed-loop hydraulic circuit (164) associated with a swing mechanism (105) of a machine is controlled to obtain both a pressure control during acceleration and deceleration of the swing mechanism (105) and a velocity control during coasting. In this manner, a system pressure in closed-loop hydraulic circuit (164) is maintained below a maximum allowable pressure during acceleration and deceleration, and the swing mechanism (105) can be rotated at a desired constant speed during coasting. This is achieved by controlling a hydraulic actuator (142) adjusting the displacement of a variable displacement pump (140) in different control modes, depending on a comparison between a desired displacement of the pump and an actual displacement of the same.

Liquid pressure motor

本发明的目的在于提供一种具备制动结构的液压马达，在使液压马达机构停止时，抑制从液压马达机构排出的液体的压力变动（压力振动），并且使停止时的冲击比以往更小。油压马达（100）具备与用于将压力油导入安全阀（2）的背压室21的先导通路（54）相连、且具有使背压室（21）与油箱（102）连通的第1切换位置（3a）、和使先导通路（54）与背压室（21）连通的第2切换位置（3b）的切换阀（3）。通过该切换阀（3），在油压马达机构（1）驱动时，向油压马达机构（1）供给的压力油也经由先导通路（54）导入背压室（21），在油压马达机构（1）的制动动作时，当先导通路（54）的压力为规定压力以下时，将背压室（21）与油箱（102）相连。

Improvements in the Oil-Hydraulic Control of Stepwise Movements for the Rapid Acceleration of Large Masses

Rotary head driven by a hydraulic motor at a high rotation speed for electrostatically spraying liquid products

Compressed air treatment apparatus and method of operating the same

CONTROL VALVE, DERRICKING CYLINDER AND WORKING METHOD THEREOF, AERIAL WORK PLATFORM

FORESTRY MACHINE WITH HYDRAULIC SYSTEM AND METHOD FOR ROTOR BRAKING

Embodiments relate to braking high-speed rotational cutting equipment. In particular, some embodiments relate to forestry machinery having a cutting or mower apparatus, and further having a hydraulic brake. The brake includes a counterbalance valve which pressurizes fluid at the motor outlet to a predetermined level when flow of hydraulic fluid from a pump to a motor is discontinued. The hydraulic brake may include a restrictor orifice to reduce sudden pressure increases on the motor. The predetermined pressure level may be between about 2000 psi and about 4000 psi and the orifice may have a diameter of between about 0.025 and 0.040 inches. The counterbalance vent port can hydraulically connect to the motor case line. An anti-cavitation valve can be at the counterbalance valve port can supply fluid to the motor inlet after the flow from the pump discontinues. Additional embodiments include related hydraulic control systems and methods.

SHOVEL

A hydraulic shovel according to an embodiment of the present invention comprises: a main pump (14); a hydraulic actuator which includes a rotating hydraulic motor (21); a control valve (17) which controls a flow of hydraulic oil between the main pump (14) and the hydraulic actuator; and an accumulator (42) which is connected so as to enable the hydraulic oil to be discharged between the main pump (14) and the control valve (17), and between the rotating hydraulic motor (21) and the control valve (17). The accumulator (42) is capable of discharging the hydraulic oil upstream of the main pump (14).

Arrangement for controlling a hydraulically driven motor

The present invention relates to an arrangement for controlling a hydraulically driven motor, forming part of a hydraulic system in which hydraulic fluid under pressure forms a main flow through a main duct in which the motor is connected. The motor drives a varying load, and one or more valves ( 7 ) are adapted for controlling the hydraulic fluid flow through the motor on the one hand during operation and on the other hand for starting and stopping of the motor. One of the valves consists of a flow control valve ( 7 ) which is connected in the main duct ( 1 ) downstream of the outlet of the motor, and the flow control valve ( 7 ) is integrated with the motor housing ( 50 ).

CONTROL DEVICE FOR WORK MACHINE ON CONSTRUCTION VEHICLE AND CONTROL METHOD

Disclosed is a control device for a work machine on a construction vehicle such that a bucket cylinder is stopped at a target position, with high accuracy achieved in a bucket cylinder length, and with shock held down to a low level. A bucket cylinder length detection section (101) references a cylinder length detection table (102) on the basis of a boom angle and a bell crank angle, thereby detecting a bucket cylinder length. A bucket attitude control section (103) controls the bucket cylinder length so that a target position will be reached. Feedback control is performed until a set value which is set short of a target value is reached. After the bucket cylinder length reaches the set value, open loop control is performed until the target value is reached.

AUSGLEICHSVENTIL

Anti-Pendel-Ventil für einen hydraulischen Drehantrieb

Die Erfindung betrifft ein hydraulisches Ventil (10) mit einem Fluidströmungspfad (12), der sich zwischen einem ersten und einem zweiten Ventilanschluss (21; 22) erstreckt, wobei der Fluidströmungspfad (12) zwischen einem ersten und einem zweiten Pfadabschnitt (13; 14) teilweise von einem bezüglich einer Längsrichtung (11) beweglichen Steuerschieber (40) begrenzt wird, der in Längsrichtung (11) nacheinander eine erste, eine zweite, eine dritte, eine vierte und eine fünfte Schaltstellung (51–55) aufweist, wobei wenigstens eine Feder (15; 16) vorgesehen ist, welche so gegen den Steuerschieber (40) verspannt ist, dass dieser sich in Richtung der dritten Schaltstellung (53) bewegt, wobei der Steuerschieber (40) von einem Druck im ersten Pfadabschnitt (13) derart beaufschlagt ist, dass er sich in Richtung der ersten Schaltstellung (51) bewegt, wobei er vom einem Druck im zweiten Pfadabschnitt (14) derart beaufschlagt ist, dass er sich in Richtung der fünften Schaltstellung (55) bewegt, wobei der Steuerschieber (40) so ausgebildet ist, dass der Fluidströmungspfad (12) in der ersten und der fünften Schaltstellung (51; 55) gesperrt ist, wobei der Steuerschieber (40) so ausgebildet ist, dass er in der zweiten und der vierten Schaltstellung (52; 54) eine Engstelle in dem Fluidströmungspfad (12) begrenzt. Erfindungsgemäß ist an einer Außenumfangsfläche (41) des Steuerschiebers wenigstens eine sich in Längsrichtung erstreckende Nut (45) angeordnet, wobei der Fluidströmungspfad (12) seitens des Steuerschiebers (40) ausschließlich von der wenigstens einen Nut (45) begrenzt wird.

Hydraulischer Seilwindenantrieb mit Hydrospeicher im Stelldruckströmungspfad

Die Erfindung betrifft einen hydraulischen Antrieb (10) mit einer Pumpe und einem Hydromotor (30), welche derart fluidisch miteinander verbunden sind, dass von der Pumpe unter Druck gesetzte Druckflüssigkeit zum Hydromotor (30) leitbar ist, wobei die Pumpe ein erstes Verdrängungsvolumen aufweist, welches abhängig von einem ersten Stelldruck stetig verstellbar ist, wobei der Hydromotor (30) ein zweites Verdrängungsvolumen aufweist, welches abhängig von einem zweiten Stelldruck (33) stetig verstellbar ist, wobei eine Steuervorrichtung (50) vorgesehen ist, mit welcher ein erster Steuerdruck (51) erzeugbar ist.Erfindungsgemäß ist zwischen den ersten Steuerdruck (51) und den zweiten Stelldruck (33) eine Drossel (70) geschaltet, wobei der zweite Stelldruck (33) derart an einen Hydrospeicher (71) angeschlossen ist, dass der Hydrospeicher (71) vom ersten Steuerdruck (51) über die Drossel (70) aufladbar ist.

Control device for hydraulic cylinder

A control device for a hydraulic cylinder has cushioning chambers (8) that are provided near both ends of a hydraulic cylinder (1) and restrict the inflow or outflow of a hydraulic oil as a piston (5) approaches each end of its stroke, and a control valve (13) provided in passages for feeding the hydraulic oil to or discharging it from oil chambers (6, 7) of the hydraulic cylinder (1). In stroke end regions of the piston, the opening degree of the control valve (13) is varied by a controller (9) based on output from pressure sensors (16, 17), so that a cushioning pressure is regulated to control the moving speed of the piston (5). The structure enables a deceleration rate of the piston (5) to be freely regulated in varied manners in its stroke end regions in accordance with working conditions of the hydraulic cylinder.

Control system for an excavator

In a control system for automatically controlling the operation of actuators of an excavator, a brake mechanism 45 for the swing motor 10 is controlled with an adjustable timing control. Adjustment of a lever/pedal 21 is inputted to an electronic controller 24 which, depending on whether the lever is moved away from or towards a neutral position, either immediately releases the brake 45 and opens an on/off valve 46 to initiate swinging of the motor 10 or after a lapse of 5 seconds applies the brake and closes the valve. ...

Inertia body drive device

Hydraulic system for controlling rotation of boom, control method thereof and concrete pumping equipment

The invention discloses a hydraulic system for controlling rotation of a boom and a control method thereof. The hydraulic system comprises a hydraulic motor, a main valve, a hydraulic pump and an oil tank. When the main valve controls the hydraulic motor to rotate, an oil inlet passage of the hydraulic motor is communicated with the hydraulic pump, and an oil return passage is communicated with the oil tank. After the main valve controls the hydraulic motor to stop rotating, the oil inlet passage and the oil return passage are both locked. The hydraulic system comprises a controller and a detection device. After the main valve controls the hydraulic motor to stop rotating, the detection device is capable of detecting pressure value of the oil return passage, and the controller controls the degree of opening of the main valve based on the pressure value so as to enable the oil return passage to be communicated with the oil tank. Therefore, when the boom starts to stop rotating and the oil ...

CRANE HAVING A CLOSED HYDRAULIC CIRCUIT

A crane, in particular a mobile crane, having a closed hydraulic circuit in which a hydraulic pump is hydraulically connected to at least one hydraulic motor via a feed and a discharge, and in which the feed is hydraulically connected to the discharge via at least one bypass which bypasses the at least one hydraulic motor, wherein the at least one bypass includes a continuously adjustable valve for variably controlling the fluid flow bypassing the at least one hydraulic motor. In addition, a corresponding control device and a corresponding crane control program for actuating a closed hydraulic circuit of a crane are provided.

Transporter vehicle

A control valve device comprises two direction control valves. The direction control valve includes an expansion side variable throttle portion and a contraction side variable throttle portion. The direction control valve includes an expansion side variable throttle portion and a contraction side variable throttle portion. When a hoist cylinder is telescopically operated to raise or lower a vessel, as the hoist cylinder ( 10 ) approaches a stop position, a controller determines that the hoist cylinder gets close to the stop position. Based upon this determination, the controller variably adjusts a flow passage area of the direction control valve using the variable throttle portions or variably adjusts a flow passage area of the direction control valve using the variable throttle portions in such a manner as to slow down or speed up the telescopic speed of the hoist cylinder corresponding to the weight in the side of vessel.

Work Machine

To provide a work machine capable of efficiently regenerating the energy owned by hydraulic fluid during a swing deceleration. In the present invention, when a swing deceleration detection section 57 a detects the state of a revolving upperstructure 102 being decelerated, when an operation judgment section 57 c judges the state that a double-tilting pump/motor 14 is not supplying hydraulic fluid to any of a boom cylinder 1 and an arm cylinder 3 , and when the number of double-tilting pumps/motors 14, 18 having supplied hydraulic fluid to a swing hydraulic motor 7 in the state before the swing deceleration detection section 57 a detects the state of the revolving upperstructure 102 being decelerated is equal to one or more, a pump valve control section 57 d controls changeover valves 43 a, 45 b, 45 d, 49 d to open and increases the displacements of the double-tilting pumps/motors 14, 18 to the side to make suction pressures become higher than discharge pressures of the double-tilting pumps/motors 14, 18 so that the double-tilting pumps/motors 14, 18 operate as motors.

Method for controlling swing motor in hydraulic system and hydraulic system

The present disclosure relates to a method for controlling a swing motor in a hydraulic system and a hydraulic system. The method for controlling the swing motor in the hydraulic system and the hydraulic system according to the exemplary embodiment of the present disclosure may ensure the sufficient amount of hydraulic oil in a make-up line in a situation in which the hydraulic oil needs to be supplementarily supplied to the swing motor in the hydraulic system. Therefore, it is possible to prevent the occurrence of cavitation in the swing motor by stably supplying the amount of hydraulic oil at the point in time where the hydraulic oil needs to be supplementarily supplied to the swing motor. In addition, it is possible to prevent the occurrence of abnormal noise which is harsh to the ear when the cavitation occurs.

Slewing type construction machine

Provided is a slewing type construction machine including an upper slewing body and a slewing speed sensor that detects a slewing speed of the upper slewing body, enabling accurate control to be achieved regardless of an error in output from the slewing speed sensor. The construction machine includes an upper slewing body, a slewing motor, a hydraulic pump, a control valve, a slewing operation device, a slewing brake, a slewing speed sensor, a slewing operation detector that detects an operation applied to the slewing operation device, and a controller. The controller stores, during a slewing operation, a slewing speed detected by the slewing speed sensor at set time intervals, actuates the slewing brake based on a neutral return operation of the slewing operation device, and resets a stored value of the slewing speed that is stored during actuation of the slewing brake, to zero.

Electrohydraulic implement pressure cutoff

An electrohydraulic implement pressure cutoff system is disclosed that includes a pump, one or more hydraulic functions, at least one valve, sensors and control unit. The pump powers the functions, and the valves control flow between the pump and their associated function. The sensor readings indicate system parameters. The control unit receives the readings and controls the valves. When the readings indicate a function is at or beyond a threshold, the control unit closes the associated valve to prevent flow to or from that function. The sensors can be pressure, position or other types of sensors. Operator control signals can be provided to control the functions. When the readings indicate a function is at or beyond a threshold in a stalled direction and the operator signals keep commanding the function in the stalled direction, the control unit can close the associated valve regardless of the operator signals.

CRANE HYDRAULIC SYSTEM AND CONTROLLING METHOD OF THE SYSTEM

A crane hydraulic system and a controlling method of the system is provided in order to fundamentally reduce impact in start and stop operations of a load sensing winch system. The load sensing subsystem is arranged, at the start and stop moments of a winch system, the pressure compensator can be opened, and the variable pump oil inlet line communicates with the oil return line to realize pressure relief, so as to reduce the pressure impact. 1. A crane hydraulic system comprising:a confluence control subsystem, wherein the confluence control subsystem comprises:a solenoid valve, a shuttle valve, a hydraulic operated reversing valve and a confluence valve;wherein an oil inlet of the solenoid valve communicates with a control pressure source, a first oil inlet of the shuttle valve communicates with a working oil port of the hydraulic operated reversing valve, a second oil inlet of the shuttle valve communicates with a working oil port of the solenoid valve, an oil outlet of the shuttle valve communicates with a control port of the confluence valve, a hydraulic operated port of the hydraulic operated reversing valve communicates with at least one first load pressure source, an oil inlet of the hydraulic operated reversing valve communicates with at least one second load pressure source, a first oil port of the confluence valve communicates with a first main pump, and a second oil port of the confluence valve communicates with a second main pump; in a state where the solenoid valve is energized, the oil inlet of the solenoid valve is configured to communicate with the working oil port, and in a state where the solenoid valve is de-energized, the working oil port of the solenoid valve is configured to communicate with an oil return port;in a state where the hydraulic operated reversing valve reverses through the hydraulic operated port, the oil inlet of the hydraulic operated reversing valve is configured to communicate with the working oil port of the hydraulic operated ...

Apparatus, Controller and Method For Controlling the Cool Down of an Aircraft Engine Rotor

An apparatus, system, and method for reducing the warpage of a rotor of an aircraft engine. When the aircraft engine is placed in standby mode, a solenoid-operated bypass valve may receive a control signal to open. When open, the solenoid-operated bypass valve places an electric hydraulic pump in fluidic communication with an engine driven hydraulic pump. The engine driven hydraulic pump rotates because of the pressured provided by the electrical hydraulic pump. The mechanical linkage between the engine driven hydraulic pump and the rotor causes the rotor of the aircraft engine to rotate.

AUTOMATIC TUNING OF VALVE FOR REMOTE CONTROLLED DEMOLITION ROBOT

A remote controlled demolition robot () comprising a controller () and at least one control switch () for providing a control signal that is received by the controller (), wherein the controller () is configured to control the operation of a corresponding robot part (). The controller () is further configured to: receive a pressure sensor reading from a pressure sensor () for a proportional hydraulic valve (), said pressure sensor reading indicating a standby pressure; provide the control signal to the valve (); and increase a signal level of the control signal provided to the valve () until a change in the pressure is detected; determine a starting offset for the valve (), said starting offset corresponding to the current signal level of the control signal. 1. A remote controlled demolition robot comprising a controller and at least one control switch for providing a control signal that is received by the controller , wherein the controller is configured to control operation of a corresponding robot part , wherein the controller is further configured to:receive a pressure sensor reading from a pressure sensor for a proportional hydraulic valve, said pressure sensor reading indicating a standby pressure;provide the control signal to the valve;increase a signal level of the control signal provided to the valve until a change in the pressure sensor reading is detected; anddetermine a starting offset for the valve, said starting offset corresponding to a current signal level of the control signal.2. The remote demolition robot according to claim 1 , wherein the controller is further configured to receive a second pressure sensor reading from the pressure sensor for the valve;decrease the signal level of the control signal provided to the valve until the second pressure sensor reading corresponds to the standby pressure;determine a stopping offset for the valve, said stopping offset corresponds to the current signal level of the control signal.3. The remote controlled ...

Hydraulic drive system of construction machine

A bi-directional pump connected to a motor by a pair of supply/discharge lines; a regulator changes the bi-directional pump tilting angle; and a controller controls the regulator based on a turning signal outputted from a turning operation valve. At the turning acceleration, at which the signal increases, the controller calculates a motor flow rate passing through the motor and an instruction flow rate determined based on the turning signal. If the instruction flow rate is greater than a reference flow rate obtained by adding a predetermined value to the motor flow rate, the controller controls the regulator so the bi-directional pump tilting angle is adjusted to a tilting angle realizing the reference flow rate. If the instruction flow rate is not greater than the reference flow rate, the controller controls the regulator so the bi-directional pump tilting angle is adjusted to a tilting angle realizing the instruction flow rate.

COMPRESSED AIR PREPARATION DEVICE AND METHOD FOR OPERATING SAME

The invention relates to a compressed air preparation device for rail vehicles or utility vehicles, comprising a compressed air inlet, to which an air compressor can be connected, a compressed air outlet, which is connected to the compressed air inlet via a compressed air duct, and an air drying device arranged in the compressed air duct. In the event that the air compressor is switched off, the compressed air duct is vented upstream of the air drying device so that, at restart, the air compressor can start against a reduced counterpressure. 1. A compressed air preparation device for rail vehicles or commercial vehicles , the device comprising:a compressed air inlet, to which an air compressor is connectable;a compressed air outlet, which is connected via a compressed air line to the compressed air inlet;an air drying device, which is arranged in the compressed air line; anda control device configured to vent the compressed air line upstream of the air drying device when the air compressor is switched off.2. The compressed air preparation device of claim 1 , further comprising a venting outlet provided for a regeneration mode of the air drying device and connected via a venting line to the compressed air line upstream of the air drying device claim 1 ,wherein the control device is configured to vent the compressed air line via the venting outlet when the air compressor is switched off.3. The compressed air preparation device of claim 2 , further comprising an outlet valve device is provided in the venting line claim 2 ,wherein the control device is configured to actuate the outlet valve device into the open state when the air compressor is switched off.4. The compressed air preparation device of further comprising an inlet valve device provided in the compressed air line upstream of the air drying device claim 2 ,wherein the control device is configured to actuate the inlet valve device into the open state when the air compressor is switched off.5. The compressed ...

APPARATUS AND METHOD FOR HIGH ENERGY DENSITY LINEAR ACTUATION WITH INTEGRAL BRAKING

A pneumatic artificial muscle (PAM) actuator includes first and second end caps, an elastic bladder connected to the end caps, and a covering around the elastic bladder and connected to the end caps. At least one of the first and second end caps is configured to move and narrow a distance between the end caps in response to inflation of the elastic bladder by a fluid. At least one of the end caps includes a vent configured to allow the fluid to exit the elastic bladder and collapse the covering after activation of the PAM actuator. At least the covering is configured to provide braking for the PAM actuator. The covering may be configured to collapse at least partially between the first and second end caps to provide at least some of the braking for the PAM actuator. 1. A method comprising:inflating an elastic bladder of a pneumatic artificial muscle (PAM) actuator to move an object connected to the PAM actuator, the PAM actuator comprising a covering around the elastic bladder;venting the elastic bladder while the object connected to the PAM actuator is moving; andbraking the PAM actuator using at least the covering.2. The method of claim 1 , wherein:the PAM actuator comprises first and second end caps, a distance between the end caps narrowing in response to the inflation of the elastic bladder; andbraking the PAM actuator using at least the covering comprises collapsing the covering at least partially between the first and second end caps.3. The method of claim 2 , wherein braking the PAM actuator further comprises:re-extending a portion of the covering in an inverted manner between the first and second end caps.4. The method of claim 1 , wherein venting the elastic bladder comprises using a burst disc or pressure release valve to allow fluid to escape from the elastic bladder.5. The method of claim 1 , wherein:venting the elastic bladder comprises breaking a burst disc to allow fluid to escape from the elastic bladder;the PAM actuator comprises first and second ...

Shovel and shovel driving method

쇼벨은, 선회용 유압모터(21)와, 선회용 유압모터를 구동하는 선회구동유압회로와, 엔진(11)에 접속되어, 상기 선회구동유압회로로부터 배출된 작동유가 공급되는 어시스트유압모터(40)와, 쇼벨의 구동을 제어하는 컨트롤러(30)를 갖는다. 컨트롤러(30)는, 엔진의 부하상태를 검출하고, 검출된 부하상태에 근거하여, 선회 감속 시의 어시스트유압모터(40)로의 작동유의 공급을 제어한다. The shovel includes a swing hydraulic motor 21, a swing drive hydraulic circuit for driving the swing hydraulic motor, and an assist hydraulic motor 40 connected to the engine 11 and supplied with hydraulic oil discharged from the swing drive hydraulic circuit. ) and a controller 30 that controls driving of the shovel. The controller 30 detects the load condition of the engine, and controls the supply of hydraulic oil to the assist hydraulic motor 40 during turning and deceleration based on the detected load condition.

Flow rate controller and driving device provided with same

具备：对气缸(12)进行高压空气的导入或进行排放空气的排放的主流路(34)；与主流路(34)并列设置的副流路(36)；通过对在副流路(36)流动的排放空气的流量进行调节来抑制气缸(12)的动作速度的排气流量调节部(42)；以及连接在气缸(12)、主流路(34)以及副流路(36)之间，并进行切换使主流路(34)或副流路(36)与气缸(12)连接的切换阀(38)，通过滑阀构成切换阀(38)。

Rotary buffering valve, Hydraulic slewing system and engineering machinery

本发明涉及一种回转缓冲阀、回转液压系统及工程机械。其中，回转缓冲阀包括阀体，阀体的第一油口和第二油口分别经第一油路和第二油路与阀体的第一工作油口和第二工作油口相通，在第一油路或第二油路的旁通油路上并联设置有不同开启压力的至少两个缓冲装置。回转缓冲阀通过在第一油路或第二油路的旁通油路上并联设置不同开启压力的至少两个缓冲装置，满足了工程车辆在不同负载工况下的启停缓冲性能需要，也实现了技术成本的降低，技术方案可靠性高，易于大面积推广使用。

Liquid pressure motor

本发明的目的在于提供一种具备制动结构的液压马达，在使液压马达机构停止时，抑制从液压马达机构排出的液体的压力变动（压力振动），并且使停止时的冲击比以往更小。油压马达（100）具备与用于将压力油导入安全阀（2）的背压室21的先导通路（54）相连、且具有使背压室（21）与油箱（102）连通的第1切换位置（3a）、和使先导通路（54）与背压室（21）连通的第2切换位置（3b）的切换阀（3）。通过该切换阀（3），在油压马达机构（1）驱动时，向油压马达机构（1）供给的压力油也经由先导通路（54）导入背压室（21），在油压马达机构（1）的制动动作时，当先导通路（54）的压力为规定压力以下时，将背压室（21）与油箱（102）相连。

Control device and control method for construction machine working machine

Compressed air preparation device and method for operating a compressed air preparation device

本发明涉及一种用于轨道车辆或商用车的压缩空气准备装置(10)，其包括：压缩空气入口(12)，在该压缩空气入口上能连接空气压缩机(14)；压缩空气出口(18)，该压缩空气出口经由压缩空气管路(16)与所述压缩空气入口(12)连接；以及设置在所述压缩空气管路(16)中的空气干燥装置(22)。当所述空气压缩机(14)被切断时，使压缩空气管路(16)在空气干燥装置(22)的上游排气，从而空气压缩机(14)在重新起动时能够克服减少的背压起动。

Hydraulic system for construction machinery

붐-엎 및 아암-인의 동시 조작으로 인해 정지작업을 수행하기 위한 유압시스템을 개시한다. 본 발명에 따른 유압시스템에 있어서, 제1,2유압펌프에 각각 연결되는 아암 실린더 및 붐 실린더와, 제2유압펌프의 토출유로에 설치되는 제1붐 제어밸브와, 제1유압펌프의 토출유로에 설치되고 제1유압펌프의 작동유를 제2유압펌프로부터 붐 실린더에 공급되는 작동유에 합류시키는 제2붐 제어밸브와, 제1유압펌프의 토출유로에 설치되는 제1아암 제어밸브와, 제2유압펌프와 토출유로에 설치되고 제2유압펌프의 작동유를 제1유압펌프로부터 아암 실린더에 공급되는 작동유에 합류시키는 제2아암 제어밸브와, 제1아암 제어밸브의 작동유 입구포트와 유압탱크사이의 유로에 설치되는 재생밸브와, 붐-엎 및 아암-인의 동시 조작으로 복합작동시, 붐-엎 스트로크 대비 붐-엎 파일럿압력이 증가되지않는 평행한 압력 구간을 포함하는 제2붐 제어밸브용 스풀을 구비하는 것을 특징으로 하는 유압시스템을 제공한다.

Self contained energy-conserving hydraulic actuator system

本发明的自给式节能液压致动器系统包括：液压缸、伺服电机、泵以及电磁阀，伺服电机配置为产生从零RPM至最大额定RPM的额定扭矩，转子速度/位置反馈至伺服电机，电磁阀使得液压缸能够保持其位置而不需要电机运行。该系统能够通过使用电磁阀来保持负载的位置，而不需要电机运行，因此通过最小化电机运行时间来节省能量并延长电机寿命。

Hydraulic drive of work machine

Hydraulic device

Hydraulic control system having swing oscillation dampening

A hydraulic control system is disclosed. The hydraulic control system may have an input device to generate a first signal indicative of a desired swing motor movement, and a control valve configured to selectively pass fluid to the swing motor and drain from the swing motor to drive the swing motor based on the first signal. The hydraulic control system may also have a pressure sensor to generate a second signal indicative of a swing motor pressure, a speed sensor configured to a third signal indicative of a swing motor speed, and a controller configured to make a comparison of at least one of the swing motor speed and the swing motor pressure with a threshold speed and a threshold pressure, and open the control valve to drain fluid from the swing motor to the tank based on the comparison when the input device is in a neutral condition.

Control valve, undulating cylinder and its operation method, workbench at height

Relief divice of stop shock for heavy equipment

본 발명은 중장비의 정지충격 완화장치에 관한 것이다. The present invention relates to a static shock mitigation device for heavy equipment. 본 발명에 의한 중장비의 정지충격 완화장치는, 리어플랜지(100) 내부에 형성되는 리어관통홀(200)에 삽입되어 유동되고, 내부의 유로를 통해 유체를 안내하는 스풀(210)과; 상기 스풀(210)의 이동을 제어하는 스토퍼조립체(220)와; 상기 스토퍼조립체(220)의 유동을 강제하는 스토퍼지지스프링(230)과; 상기 리어관통홀(200)의 일단에 체결되어, 상기 스토퍼지지스프링(230)의 일단을 지지하는 고정플러그(240)를 포함하여 구성되고; 상기 스토퍼조립체(220)는 내부에 관통홀이 형성되며 외관을 구성하는 스토퍼(222)와, 상기 스토퍼(222)의 관통홀에 삽입되어 슬라이딩되고 일단이 상기 스풀(210)의 일단에 접하는 스토퍼스풀(224)과, 상기 스토퍼스풀(224)의 유동을 강제하는 부재스프링(226)과, 상기 부재스프링(226)을 지지하는 스프링스토퍼(228) 등으로 구성된다. 그리고, 상기 스토퍼스풀(224)의 내부에는 상기 스풀(210)의 내부 유로와 연통되는 안내유로(224')가 형성된다. 이와 같은 본 발명에 의하면, 정지충격의 완화로 사용자의 승차감이 향상되는 이점이 있다. The apparatus for mitigating static shock of heavy equipment according to the present invention includes: a spool 210 inserted into a rear through-hole 200 formed inside the rear flange 100 and flowing to guide fluid through an internal flow path; A stopper assembly 220 for controlling the movement of the spool 210; A stopper support spring 230 for forcing the flow of the stopper assembly 220; A fixing plug 240 fastened to one end of the rear through hole 200 to support one end of the stopper support spring 230; The stopper assembly 220 includes a stopper 222 having a through hole formed therein, and a stopper 222 constituting an external appearance and a stopper pool inserted into the through hole of the stopper 222 and having one end contacting one end of the spool 210. 224, a member spring 226 forcing the flow of the stopper pool 224, a spring stopper 228 for supporting the member spring 226, and the like. In addition, a guide flow path 224 ′ communicating with an internal flow path of the spool 210 is formed in the stopper pool 224. According to the present invention as described above, there is an advantage that the riding comfort of the user is improved by alleviating the stop shock. 중장비, 주행모터, 스토퍼, 정지, 충격 Heavy Equipment, Travel Motor, Stopper, Stop, Shock

CONTROL SYSTEM FOR A STABILIZER FOOT, STABILIZATION DEVICE AND VEHICLE INCLUDING A STABILIZATION DEVICE

Le système de commande d'un pied stabilisateur (112) comporte un vérin hydraulique (116) et un circuit hydraulique (124) d'alimentation en fluide hydraulique du vérin hydraulique, le vérin hydraulique (116) comportant une tige de vérin (114), à l'extrémité de laquelle peut être fixé le pied stabilisateur (112), et au moins une chambre hydraulique (118) commandant la position de la tige de vérin (114), le circuit hydraulique d'alimentation (124) comportant une branche d'alimentation (126) de la chambre hydraulique (118) comprenant des premiers moyens (138) sélectivement activables pour empêcher un écoulement du fluide hydraulique depuis le vérin hydraulique, et des seconds moyens (130, 136) pour empêcher un écoulement du fluide hydraulique depuis le vérin hydraulique tant que la pression du fluide hydraulique dans la chambre hydraulique est inférieure à une valeur de seuil prédéterminée, les seconds moyens (136) étant disposés entre les premiers moyens (138) et la chambre hydraulique (118). The stabilizer foot control system (112) comprises a hydraulic cylinder (116) and a hydraulic circuit (124) for supplying hydraulic fluid to the hydraulic cylinder, the hydraulic cylinder (116) comprising a cylinder rod (114) , at the end of which the stabilizer foot (112) can be fixed, and at least one hydraulic chamber (118) controlling the position of the cylinder rod (114), the hydraulic supply circuit (124) comprising a branch supply (126) of the hydraulic chamber (118) comprising first means (138) selectively activatable to prevent flow of hydraulic fluid from the hydraulic cylinder, and second means (130, 136) to prevent flow of hydraulic fluid from the hydraulic cylinder as long as the pressure of the hydraulic fluid in the hydraulic chamber is below a predetermined threshold value, the second means (136) being arranged between the first means (138) and the hydraulic chamber (1 18).

Device for controlling the decompression of the working fluid in hydraulic machines such as presses and machines equipped with said device

Control system to automatically control an excavator based on control levers or pedals.

L'invention concerne un procédé de commande pour une excavatrice comportant des moyens d'actionnement (6, 8, 10, 14, 16). En fonction de l'état de fonctionnement de leviers et/ou de pédales de commande (21), on compare la vitesse de fonctionnement des moyens d'actionnement avec une courbe d'accélération ou de décélération standard et on calcule les valeurs de sorties respectives correspondant aux quantités de liquide hydraulique (3, 4). The invention relates to a control method for an excavator comprising actuating means (6, 8, 10, 14, 16). Depending on the operating state of levers and / or control pedals (21), the operating speed of the actuating means is compared with a standard acceleration or deceleration curve and the respective output values are calculated. corresponding to the quantities of hydraulic fluid (3, 4).

Hydraulic drive system

Method for automatically controlling the orientation motor of an excavator.

L'invention concerne un procédé de commande pour une excavatrice comprenant des moyens d'actionnement. Si une valeur de positionnement d'un moteur d'orientation (10) est croissante. La valeur mécanique est commandée pour supprimer la puissance de freinage dans un délai de 0,1 s après la manœuvre des leviers et/ou pédales de commande (21). Si la valeur de positionnement est décroissante, on détermine si 5 secondes se sont écoulées après la manœuvre des leviers et/ou pédales (21) et on applique la puissance de freinage au mécanisme de décélération (49). The invention relates to a control method for an excavator comprising actuation means. If a positioning value of an orientation motor (10) is increasing. The mechanical value is commanded to remove the braking power within 0.1 s after the operation of the control levers and / or pedals (21). If the positioning value is decreasing, it is determined whether 5 seconds have elapsed after the operation of the levers and / or pedals (21) and the braking power is applied to the deceleration mechanism (49).

Self-contained energy efficient hydraulic actuator system

본 발명의 자급식 에너지 효율적 유압 액추에이터 시스템은 유압 실린더, 0 RPM에서 최대 정격 RPM까지 정격 토크를 생산하고 로터의 속도와 위치를 서보 모터에 피드백하는 서보 모터, 펌프 및 모터 작동없이 유압 실린더의 위치를 유지하는 솔레노이드 밸브를 포함한다. 상기 시스템은 솔레노이드 밸브를 사용하여 모터의 작동 없이 하중을 제자리에 유지하고, 이에 따라, 에너지를 절약하고 모터 작동 시간을 최소화 하여 모터의 수명을 연장한다.

Control valve, derricking cylinder and working method thereof, aerial work platform

고소 작업 분야에 관해, 제어 밸브, 기복 실린더, 이의 작동 방법, 및 고소 작업대가 제공된다. 기복 실린더의 제어 밸브는, 제1 포트 G와 제2 포트 F 사이의 오일 회로 상에 제공되는 제1 밸런스 밸브, 및 제3 포트 H와 제4 포트 E 사이의 오일 회로 상에 제공되는 제2 밸런스 밸브를 포함하고; 제1 밸런스 밸브와 직렬인 스위치 밸브는 제1 포트 G와 제2 포트 F 사이의 오일 회로 상에 추가로 제공된다. Regarding the field of aerial work, a control valve, a relief cylinder, a method of operation thereof, and an aerial work table are provided. The control valve of the relief cylinder includes a first balance valve provided on the oil circuit between the first port G and the second port F, and a second balance valve provided on the oil circuit between the third port H and the fourth port E. Including a valve; A switch valve in series with the first balance valve is further provided on the oil circuit between the first port G and the second port F.

Damping hydraulic circuit for hydraulic cylinder for working machine

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Solenoid flow control valve

A solenoid flow control valve includes: an inlet passage that allows an inlet port to communicate with a pilot pressure chamber; an outlet passage that allows the pilot pressure chamber to communicate with an outlet port; a fixed restrictor provided on the outlet passage; a pilot spool that closes the inlet passage when a solenoid is in a non-excitation state, whereas when solenoid is in an excitation state, opens inlet passage at an opening degree corresponding to an input current value to generate a pilot pressure corresponding to the input current value in pilot pressure chamber, the pilot spool opening a bypass passage when input current value is less and closes bypass passage when input current value is greater than or equal to the predetermined value; and a main spool that controls a flow rate from inlet to outlet port in accordance with the pilot pressure chamber's pilot pressure.

COOL COMPENSATOR.

Driving method and driving device of fluid pressure cylinder

유체압 실린더(12)를 구동하기 위한 구동장치(10)는, 에어를 공급하는 에어 공급원(52)과, 상기 유체압 실린더(12)에 대한 상기 에어의 공급 및 배출 상태를 전환하는 전환 밸브(14)와, 상기 유체압 실린더(12)의 헤드측 실린더실(16)과 로드측 실린더실(18)을 접속하는 바이패스 배관(20)과, 상기 바이패스 배관(20)에 있어서의 에어의 유동상태를 전환하는 바이패스 전환 밸브(22)를 가지고 있다. 그리고, 유체압 실린더(12)의 복귀 단계에 있어서, 바이패스 전환 밸브(22)를 개방상태로 함으로써, 헤드측 실린더실(16)의 에어를 바이패스 배관(20)을 통해서 로드측 실린더실(18)에 공급한다. The drive device 10 for driving the fluid pressure cylinder 12 includes an air supply source 52 for supplying air, and a switching valve for switching the supply and discharge states of the air to the fluid pressure cylinder 12 ( 14), the bypass pipe 20 connecting the head side cylinder chamber 16 and the rod side cylinder chamber 18 of the fluid pressure cylinder 12, and the air in the bypass pipe 20 It has a bypass switching valve 22 that switches the fluid state. Then, in the return stage of the fluid pressure cylinder 12, by setting the bypass switching valve 22 to an open state, the air in the head-side cylinder chamber 16 passes through the bypass pipe 20 to the rod-side cylinder chamber ( 18) is supplied.

Shovel

A shovel according to one embodiment of the present invention is provided with a main pump 14, hydraulic actuators including a swing hydraulic motor 21, a control valve 17 configured to control a flow of a working oil between the main pump 14 and the hydraulic actuators, and an accumulator part 42 configured to release the working oil between the main pump 14 and the control valve 17, and between the swing hydraulic motor 21 and the control valve 17. The accumulator part 42 can release the working oil at an upstream of the main pump 14.

Control mechanism for a rotary disk of a dual-color injection molding machine

A control mechanism includes two hydraulic cylinders, a valve connected to the cylinders, and an actuating unit for the valve; racks are joined to power output rods of the cylinders, facing each other, and engaging a gear secured on a rotary disk; the valve includes a body, and a rod made to stick out from the body at outward end by a spring; the rod can reduce an oil passage of the body after it is displaced further into the body, and the rod can block the oil passage substantially at an end of its displacement further into the body; the actuating unit is movable with one of the power rod, and has two sloping boards thereon such that the rod will be displaced further into the body when the actuating unit moves with the power rod, and when the sloping boards slide over the outward end of the rod of the valve.

Hydrostatic drive

Offenbart ist ein hydrostatischer Antrieb für ein Drehwerk einer stationären oder mobilen Arbeitsmaschine mit einem Speiseanschluss zum Ausgleich einer Leckage oder eines Differenzvolumenstroms. Disclosed is a hydrostatic drive for a slewing gear of a stationary or mobile work machine with a feed connection for compensating a leakage or a differential volume flow.

Cylinder operating condition monitoring device

시간에 대해서 제1 압력 값(P1)을 미분함으로써 제1 시간 미분 값(dP1)을 계산하고, 그리고/또는 시간에 대해서 제2 압력 값(P2)을 미분함으로써 제2 시간 미분 값(dP2)을 계산하는 검출기(54)의 마이크로검퓨터(62)를 포함하는 감시 장치(10). 또한, 제1 시간 미분 값(dP1) 및 제2 시간 미분 값(dP2) 중 적어도 하나에 기초하여, 마이크로컴퓨터(62)는 피스톤(16)이 실린더 메인 바디(14) 내부의 일 단부 또는 타 단부에 도달되었는지 여부를 결정한다. Calculate the first time derivative dP1 by differentiating the first pressure value P1 with respect to time and/or the second time derivative dP2 by differentiating the second pressure value P2 with respect to time A monitoring device (10) comprising a microcomputer (62) of a calculating detector (54). In addition, based on at least one of the first time differential value dP1 and the second time differential value dP2 , the microcomputer 62 determines that the piston 16 is located inside the cylinder main body 14 at one end or the other end. to determine whether it has been reached.

Apparatus, controller and method for controlling the cool down of an aircraft engine rotor

An apparatus, system, and method for reducing the warpage of a rotor of an aircraft engine. When the aircraft engine is placed in standby mode, a solenoid-operated bypass valve may receive a control signal to open. When open, the solenoid-operated bypass valve (222) places an electric hydraulic pump (204) in fluidic communication with an engine driven hydraulic pump (202). The engine driven hydraulic pump rotates because of the pressured provided by the electrical hydraulic pump. The mechanical linkage between the engine driven hydraulic pump and the rotor causes the rotor of the aircraft engine to rotate. (Fig. 2)

System for controlling a stabilising leg, stabilisation device, and vehicle including a stabilisation device

The invention relates to a system for controlling a stabilising leg (112), which comprises a hydraulic cylinder (116), and a hydraulic circuit (124) for supplying hydraulic fluid to the hydraulic cylinder, the hydraulic cylinder (116) comprising a cylinder rod (114), onto the end of which the stabilising leg (112) can be attached, and at least one hydraulic chamber (118) controlling the position of the cylinder rod (114), the hydraulic supply circuit (124) comprising an arm (126) for supply to the hydraulic chamber (118) including a first means (138) that can be selectively actuated to prevent a flow of the hydraulic fluid from the hydraulic cylinder, and a second means (130, 136) for preventing a flow of the hydraulic fluid from the hydraulic cylinder when the pressure of the hydraulic fluid in the hydraulic chamber is lower than a predetermined threshold value, the second means (136) being arranged between the first means (138) and the hydraulic chamber (118).

ADJUSTMENT SYSTEM FOR AUTOMATIC REGULATION OF EXCAVATOR ACTUATORS

E' prescritto un sistema di regolazione per regolare automaticamente il funzionamento di attuatori di un escavatore. Il sistema di regolazione della presente invenzione fornisce numerosi vantaggi per il fatto che il modo di traslazione dei motori di traslazione viene cambiato automaticamente tra un primo ed un secondo rapporto di trasmissione per corrispondere efficacemente al carico applicato sui motori di traslazione a seconda delle condizioni superficiali del terreno, il meccanismo di frenatura per la parte di motore di brandeggio è comandato con un comando di temporizzazione regolabile, il funzionamento sincrono del motore di brandeggio e del cilindro di braccio è regolato fissando semplicemente una velocità d'azionamento relativa tra di essi, la portata di fluido idraulico dalle pompe idrauliche principali ad ogni attuatore è regolata automaticamente azionare gli attuatori senza creare urti e l'operazione di sollevamento è comandata in modo regolabile per impedire un rovesciamento dell'escavatore.

The method and apparatus of power of taking a seat in independent control rotary valve

本文描述了独立地控制旋转阀中的落座力的示例性方法和装置。示例性装置包括具有流动控制构件的旋转阀和操作地耦接到所述旋转阀的双作用致动器。所述致动器具有第一端口和第二端口，以接收加压控制流体，从而改变所述致动器的位置。所述示例性装置进一步包括阀控制器，所述阀控制器操作地耦接到所述致动器，以响应于所述旋转阀的位置来控制所述加压控制流体。所述示例控制装置进一步包括压力限制器，所述压力限制器操作地耦接到所述阀控制器并流体地耦接到所述致动器的所述第一端口。所述压力限制器将减小所述加压流体的提供给所述致动器的所述第一端口的压力，以在所述旋转阀处于关闭位置时减小所述流动控制构件的落座力。

Transportation vehicle

本发明涉及运输车辆。由两个方向控制阀（20）、（21）构成控制阀装置（16）。方向控制阀（20）具有伸长侧可变节流部（20C）和缩小侧可变节流部（20D）。方向控制阀（21）具有伸长侧可变节流部（21C）和缩小侧可变节流部（21D）。在使翻斗缸（10）伸缩而使容器（3）上升或下降时，若翻斗缸（10）接近停止位置，则控制器（35）判断翻斗缸（10）接近停止位置。通过该判断，控制器（35）使用上述可变节流部（20C）、（20D）而可变地调整方向控制阀（20）的流道面积，或者使用上述可变节流部（21C）、（21D）而可变地调整方向控制阀（21）的流道面积，以便根据容器（3）侧的重量使翻斗缸（10）的伸缩速度变慢或变快。

System for controlling construction machine and method for controlling construction machine

A control system for construction machinery, includes a hydraulic pump, at least one control valve installed in a center bypass line connected to the hydraulic pump and configured to control a flow direction of a working oil discharged from the hydraulic pump to selectively supply the working oil to an actuator, a bypass control valve installed downstream from the control valve in the center bypass line to variably control an amount of the working oil draining to a drain tank through the center bypass line, and a controller configured to control operations of the hydraulic pump and the bypass control valve according to a manipulation signal of an operator and to open the bypass control valve according to pump peak occurrence to reduce a pump peak.

Slewing type construction machine

Provided is a slewing type construction machine including an upper slewing body and a slewing speed sensor that detects a slewing speed of the upper slewing body, the construction machine enabling accurate control to be achieved regardless of an error in output from the slewing speed sensor. The construction machine includes an upper slewing body, a slewing motor (8), a hydraulic pump (7), a control valve (10), a slewing operation device (11), a slewing brake (12), a slewing speed sensor (27), a slewing operation detector (26) that detects an operation applied to the slewing operation device to output a slewing operation signal, and a controller (17). The controller (17) stores, during a slewing operation, a slewing speed detected by the slewing speed sensor (27) at set time intervals, actuates the slewing brake (12) based on a neutral return operation of the slewing operation device (11), and resets a stored value of the slewing speed that is stored during actuation of the slewing brake, to zero.

Hydraulic device

液压装置包括：液压泵(P1)；马达(M1)，马达(M1)驱动液压泵(P1)；液压缸(100)，从通过马达(M1)驱动的液压泵(P1)向液压缸(100)的流入侧端口供给工作油；位置传感器(60)，位置传感器(60)对液压缸(100)的杆(101)的位置进行检测；控制器(50)，控制器(50)基于位置传感器(60)的输出来控制马达(M1)，从而控制从液压泵(P1)供给至液压缸(100)的流入侧端口的工作油的流量；压力控制回路(30)，压力控制回路(30)基于位置传感器(60)的输出来控制液压缸(100)的流出侧端口的压力。

Control mechanism for a fluid pressure motor

1400463 Apparatus for controlling a fluid operated motor AUTOMOTIVE PRODUCTS Ltd 13 April 1973 [14 April 1972] 17332/72 Heading F1P [Also in Division F2] A device e.g. a butterfly valve (not shown) is movable between two extreme positions by a rotary shaft 13 driven by a reversible fluid operated motor, the supply of fluid to the motor being controlled by a directional valve 19 manually movable from a central neutral position by a lever 44 and returned to its neutral position, when the device reaches either of its end positions, by a non-rotatable, longitudinally slidable nut 16 screwed on to the shaft 13. As the shaft 13 rotates the nut 16 traverses the shaft until an arm 17 on the nut 16 engages one or other of two stops 51, 52 adjustably mounted on a rod 48. This engagement displaces the rod 48 which in turn pivots the lever 44 and returns it to the neutral position, thereby stopping the motor. The valve 19 is preferably a spool valve spring urged towards it neutral position or having detents for holding it in either actuated position. A remotely controlled piston and cylinder actuator for powered operation of the valve is provided. A pointer (55), 56 is carried by the nut 16 to provide an indication of the position of the device. The motor is of the reversible rotary type and drives the shaft 13 through a speed reduction gear-box 12, the shaft 13 being coupled to the device through a further reduction gear-box (not shown). A bar 63 on the nut is used to displace a follower controlling a fluid or electrical remote indicator.

Hydraulic drive system for construction machinery

Slewing-type work machine

Automatic tuning of valve for remote controlled demolition robot

A remote controlled demolition robot ( 10 ) comprising a controller ( 17 ) and at least one control switch ( 24, 25, 26 ) for providing a control signal that is received by the controller ( 17 ), wherein the controller ( 17 ) is configured to control the operation of a corresponding robot part ( 10 a, 11, 14, 15 ). The controller ( 17 ) is further configured to: receive a pressure sensor reading from a pressure sensor ( 13 b ) for a proportional hydraulic valve ( 13 a ), said pressure sensor reading indicating a standby pressure; provide the control signal to the valve ( 13 a ); and increase a signal level of the control signal provided to the valve ( 13 a ) until a change in the pressure is detected; determine a starting offset for the valve ( 13 a ), said starting offset corresponding to the current signal level of the control signal.

Energy-efficient hydraulic drive for the linear movement of a mass

Hydraulically driven arrangement for the linear movement of a mass body consisting of two double acting cylinders coupled in parallel, whereby one operating cylinder is a control cylinder for controlling the movement of the mass body, which is split into an acceleration phase, a movement phase and a brake phase. The other operating cylinder is connected as a drive cylinder to the hydraulic power pack as an energy storage, in a manner that the power pack during the acceleration phase of the mass body generates the drive energy for the drive cylinder, and the drive cylinder in the brake phase of the mass body, which serves as a pump for charging the hydraulic power pack. The control cylinder and drive cylinder each have a piston with a one-sided piston rod coupled to the mass body. The control cylinder and the drive cylinder are controlled by hydraulically separated, independent control circuits.

Hydraulic device

油圧装置は、油圧ポンプ(Ｐ１)と、油圧ポンプ(Ｐ１)を駆動するモータ(Ｍ１)と、モータ(Ｍ１)により駆動された油圧ポンプ(Ｐ１)から流入側ポートに作動油が供給される油圧シリンダ(１００)と、油圧シリンダ(１００)のロッド(１０１)の位置を検出する位置センサ(６０)と、位置センサ(６０)の出力に基づいて、モータ(Ｍ１)を制御して油圧ポンプ(Ｐ１)から油圧シリンダ(１００)の流入側ポートに供給される作動油の流量を制御するコントローラ(５０)と、位置センサ(６０)の出力に基づいて、油圧シリンダ(１００)の流出側ポートの圧力を制御する圧力制御回路(３０)を備える。

Driving device for hydraulic cylinder in construction machine

本发明提供一种可以有效地避免在液压缸的行程终端处的冲击的驱动装置。该驱动装置包括：液压泵(31、32)；缸控制阀(37、38)；操作构件(47a)；驱动指令输入部(34、47b)，将与被施加于操作构件(47a)的缸操作相对应的缸驱动指令输入到缸控制阀(37、38)；缸行程检测部(50、70)；驱动指令限制部(42A、42B、50)，根据缸行程来限制缸驱动指令，以便使液压缸(27)的活塞(27p)在行程终端的跟前停止。

Independent heat dissipation hydraulic system and engineering machinery provided with same

本发明涉及一种独立散热液压系统及设置热压系统的工程机械，独立散热液压系统包括液压泵以及相互并联的风扇驱动油路和延迟控制油路。主油路和所述延迟控制油路连通时，主油路中的油液流经所述先导控制油口推动所述液控换向阀的阀芯换向，同时主油路中的油液为所述蓄能器充液；主油路和所述延迟控制油路阻断时，所述蓄能器释放储存的油液作用于所述先导控制油口使所述液控换向阀的阀芯保持换向状态；当所述蓄能器内的油液停止释放时所述液控换向阀的阀芯在弹簧力的作用下换向复位。该液压系统能够避免因油路快速切换产生压力冲击，使得马达反转停止运转过程能够平缓停止。

Hydraulic control system and method

控制与机器的摆动机构(105)相关联的闭环液压回路(164)以获得摆动机构(105)的加速和减速期间的压力控制和滑行期间的速度控制两者。以此方式，闭环液压回路(164)中的系统压力在加速和减速期间维持在最大允许压力之下，并且摆动机构(105)可以在滑行期间以期望的恒定速度旋转。这是通过根据泵的期望排量与其实际排量之间的比较，以不同的控制模式控制调节可变排量泵(140)的排量的液压致动器(142)来实现的。

Electrohydraulic arrangement and hydraulic axle

본 발명은 유압 차축용 전자 유압 장치에 관한 것이다. 전자 유압 장치는 부하의 구동을 위한 유압 기계를 포함한다. 유압 기계는 전기 모터를 통해 구동될 수 있고, 상기 전기 모터는 구동 제어 장치를 통해 제어될 수 있다. 추가로, 구동 제어 장치는 브레이크 밸브를 제어할 수 있고, 상기 브레이크 밸브에 의해 부하의 제동 과정들이 정확하게 제어된다. The present invention relates to an electro-hydraulic device for a hydraulic axle. The electro-hydraulic device includes a hydraulic machine for driving a load. The hydraulic machine may be driven by an electric motor, and the electric motor may be controlled by a drive control device. In addition, the drive control device can control a brake valve, by means of which braking processes of the load are accurately controlled.

Electrohydraulic device and hydraulic shaft

本发明涉及一种用于液压轴的电动液压的装置。所述装置具有用于驱动负载的液压机。所述液压机又通过电马达能够驱动，所述电马达通过驱动调节器能够控制。附加地，所述驱动调节器能够控制制动阀，利用所述制动阀能够精准地控制所述负载的制动过程。

Control device for work machine on construction vehicle and control method

Hybrid excavator including a fast-stopping apparatus for a hybrid actuator

The present invention relates to a hybrid excavator on which is mounted an electro-hydraulic actuator for quickly stopping a working device being operated at high speed during work such as pipe laying. The hybrid excavator on which the electro-hydraulic actuator is mounted according to the present invention is characterized in that it comprises: a first detection sensor for detecting an RCV-manipulated quantity; a second detection sensor for detecting the rotational speed of an electric motor; a hydraulic pump-motor connected to the electric motor; a hydraulic cylinder connected to the hydraulic pump-motor; first and second hydraulic valves installed in first and second passages, respectively, between the hydraulic pump-motor and the hydraulic cylinder; a third hydraulic valve for compensating for or bypassing a flow rate when a difference in the flow rate occurs due to a difference between the cross-sectional areas of a large chamber and a small chamber of the hydraulic cylinder when the hydraulic pump-motor is converted between forward or backward rotation; and a controller for receiving an RCV-manipulation signal from the first detection sensor and the rotational speed of the electric motor from the second detection sensor to compare the received values to data of previously stored working conditions, to output a control signal for switching the first and second hydraulic valves, and to block a working fluid from returning into the hydraulic cylinder, so as to thereby quickly stop the working device.

Time delay valves and flow controllers

제1 위치와 제2 위치에서 전환되는 전환 밸브(18)와, 전환 밸브(18)를 제1 위치를 향해 가압하는 가압 부재(20)와, 파일럿 유체의 공급 압력의 작용 하에, 전환 밸브(18)를 제1 위치와 반대쪽의 제2 위치를 향해 가압하는 구동 기구(22)와, 구동 기구(22)에 파일럿 유체를 인도하는 파일럿 유로(36)와, 전환 밸브(18)의 전환 타이밍을 지연시키는 지연 기구(24)를 구비한 타임 딜레이 밸브(10)에 있어서, 지연 기구(24)는 파일럿 유로(36) 상에 설치된 제1 쓰로틀 밸브(34)와, 파일럿 유체의 공급 압력의 작용 하에, 전환 밸브(18)를 제1 위치를 향해 가압하는 보상 기구(26)와, 파일럿 유로로부터 분기하여 파일럿 유체의 일부를 보상 기구(26)로 인도하는 보상 유로(44)를 갖는다.

Automatic tuning valve for remote demolition robot

A remote demolition robot (10) comprising a controller (17) and at least one control switch (24, 25, 26) for providing a control signal, that is received by the controller (17) causing the controller (17) to control the operation of a corresponding robot part (10a, 11, 14, 15) . The controller (17) is configured to: receive a pressure sensor reading from a pressure sensor (13b) for a valve (13a), said pressure sensor reading indicating a standby pressure; provide a control signal to the valve (13a); and increase a signal level of the control signal provided to the valve (13a) until a change in the pressure is detected; determine a starting offset for the valve (13a), said starting offset corresponding to the current control signal level.To be published with figure 5.

Flow rate controller and drive device comprising same

The present invention comprises: a main flow path (34) that introduces high-pressure air to an air cylinder (12) or discharges exhaust air therefrom; a sub flow path (36) provided alongside the main flow path (34); an exhaust flow rate adjustment unit (42) that suppresses the operation speed of the air cylinder (12) by adjusting the flow rate of the exhaust air flowing through the sub flow path (36); and a switching valve (38) that is connected between the air cylinder (12), the main flow path (34), and the sub flow path (36), and that connects the main flow path (34) and the sub flow path (36) to the air cylinder (12) in a switching manner. The switching valve (38) is constituted by a spool valve.

System for controlling construction machine and method for controlling construction machine

A system for controlling a construction machine comprises: a hydraulic pump; at least one control valve provided at a center bypass line connected to the hydraulic pump, and controlling the flow direction of hydraulic oil discharged from the hydraulic pump so as to selectively supply the oil to an actuator; a bypass control valve, provided at the lower side of the control valve on the center bypass line, for variably controlling the flow rate of the hydraulic oil discharged to a drain tank through the center bypass line; and a control unit for controlling the operations of the hydraulic pump and the bypass control valve according to an operation signal of an operator, and opening the bypass control valve when the pump peak is generated so as to reduce a pump peak.

Flow rate controller and drive device comprising same

A main flow path that introduces high-pressure air to an air cylinder, or discharges exhaust air therefrom, includes a sub flow path provided alongside the main flow path; an exhaust flow rate adjustment unit that suppresses the operation speed of the air cylinder by adjusting the flow rate of the exhaust air flowing through the sub flow path; and a switching valve that is connected between the air cylinder, the main flow path and the sub flow path, and that connects the main flow path and the sub flow path to the air cylinder in a switching manner. The switching valve is constituted by a spool valve.

Excavator and excavator driving method

ショベルは、旋回用油圧モータ２１と、旋回用油圧モータを駆動する旋回駆動油圧回路と、エンジン１１に接続され、前記旋回駆動油圧回路から排出された作動油が供給されるアシスト油圧モータ４０と、ショベルの駆動を制御するコントローラ３０とを有する。コントローラ３０は、エンジンの負荷状態を検出し、検出された負荷状態に基づいて、旋回減速時のアシスト油圧モータ４０への作動油の供給を制御する。 The excavator includes a turning hydraulic motor 21, a turning drive hydraulic circuit that drives the turning hydraulic motor, an assist hydraulic motor 40 that is connected to the engine 11 and that is supplied with hydraulic oil discharged from the turning drive hydraulic circuit, And a controller 30 for controlling the drive of the shovel. The controller 30 detects the load state of the engine, and controls the supply of hydraulic oil to the assist hydraulic motor 40 during turning deceleration based on the detected load state.

STABILIZER FOOT CONTROL SYSTEM, STABILIZATION DEVICE AND VEHICLE COMPRISING A STABILIZATION DEVICE

Le système de commande d'un pied stabilisateur (112) comporte un vérin hydraulique (116) et un circuit hydraulique (124) d'alimentation en fluide hydraulique du vérin hydraulique, le vérin hydraulique (116) comportant une tige de vérin (114), à l'extrémité de laquelle peut être fixé le pied stabilisateur (112), et au moins une chambre hydraulique (118) commandant la position de la tige de vérin (114), le circuit hydraulique d'alimentation (124) comportant une branche d'alimentation (126) de la chambre hydraulique (118) comprenant des premiers moyens (138) sélectivement activables pour empêcher un écoulement du fluide hydraulique depuis le vérin hydraulique, et des seconds moyens (130, 136) pour empêcher un écoulement du fluide hydraulique depuis le vérin hydraulique tant que la pression du fluide hydraulique dans la chambre hydraulique est inférieure à une valeur de seuil prédéterminée, les seconds moyens (136) étant disposés entre les premiers moyens (138) et la chambre hydraulique (118). The stabilizer foot control system (112) includes a hydraulic cylinder (116) and a hydraulic fluid supply circuit (124) for the hydraulic cylinder, the hydraulic cylinder (116) having a cylinder rod (114). , at the end of which can be fixed the stabilizing foot (112), and at least one hydraulic chamber (118) controlling the position of the cylinder rod (114), the hydraulic supply circuit (124) having a branch supply unit (126) of the hydraulic chamber (118) comprising first means (138) selectively activatable to prevent flow of hydraulic fluid from the hydraulic cylinder, and second means (130, 136) for preventing a flow of hydraulic fluid from the hydraulic cylinder as long as the pressure of the hydraulic fluid in the hydraulic chamber is less than a predetermined threshold value, the second means (136) being arranged between the first means (138) and the hydraulic chamber (118).

Hydraulic control system for improving pump response and dynamic match of pump and valve has control unit for controlling rate of change of cross-section of main flow control valve

Ein hydraulisches Steuersystem mit einer Pumpe zum Liefern von Strömungsmittel unter Druck von einem Strömungsmittelreservoir und mit einer hydraulischen Betätigungsvorrichtung, die selektiv von dem Strömungsmittel angetrieben wird, weist ein Hauptflußsteuerventil auf, welches zwischen der Pumpe und der Betätigungsvorrichtung angeschlossen ist, um selektiv das Strömungsmittel zu der Betätigungsvorrichtung hin und von dieser weg zu liefern, und eine Steuereinheit, die mit dem Hauptflußsteuerventil verbunden ist, um den Betrieb des Hauptflußsteuerventils zu steuern, um die Veränderungsrate des Querschnittes des Hauptflußsteuerventils relativ zur Lieferung des Strömungsmittels von der Pumpe zu steuern, und wobei die Steuereinheit mit der Pumpe verbunden ist, um den tatsächlichen Pumpenbefehl proportional zum umgekehrten Wert des Pumpenbefehls zu vergrößern oder zu verringern.

Hydraulic leak detection system

A hydraulic leak detection system (100) includes a leak detection switch (112) responsive to a level of hydraulic fluid in a tank used by a hydraulic mowing circuit (108) and a lift and lower circuit (109) of a grass mowing machine (102). The system includes a controller (128) that activates a warning indicator (130) if the leak detection switch indicates the level of hydraulic fluid in the tank is low, but allows the hydraulic mowing circuit and the lift and lower circuit to continue operating until the lift and lower circuit reaches a fully raised position. A solenoid valve (116) may control the level of hydraulic fluid in the tank based on temperature of the hydraulic fluid.

Cylinder operation condition monitoring device

一种监控装置(10)，该监控装置(10)包括检测器(54)的微型计算机(62)，微型计算机(62)通过相对于时间求第一压力值(P1)的微分而计算第一时间导数值(dP1)，和/或通过相对于时间求第二压力值(P2)的微分而计算第二时间导数值(dP2)。此外，基于从第一时间导数值(dP1)和第二时间导数值(dP2)之中的至少一个，微型计算机(62)判定活塞(16)是否到达了缸主体(14)内部的一端或者另一端。

Device for controlling a hydraulically driven motor

The present invention relates to an arrangement for controlling a hydraulically driven motor, forming part of a hydraulic system in which hydraulic fluid under pressure forms a main flow through a main duct in which the motor is connected. The motor drives a varying load, and one or more valves (7) are adapted for controlling the hydraulic fluid flow through the motor on the one hand during operation and on the other hand for starting and stopping of the motor. One of the valves consists of a flow control valve (7) which is connected in the main duct (1) downstream of the outlet of the motor, and the flow control valve (7) is integrated with the motor housing (50).

Swing-back prevention device

Hydraulic system for construction machinery

Disclosed is a hydraulic system for performing land preparation works by means of a simultaneous boom-up and arm-in operation. The hydraulic system according to the present invention includes: an arm cylinder and a boom cylinder that are connected to first and second hydraulic pumps, respectively; a first boom control valve that is disposed in the discharge flow path of the second hydraulic pump; a second boom control valve that is disposed in the discharge flow path of the first hydraulic pump and causes the working fluid of the first hydraulic pump to converge with the working fluid which is supplied from the second hydraulic pump to the boom cylinder; a first arm control valve that is disposed in the discharge flow path of the first hydraulic pump; a second arm control valve that is disposed in the discharge flow path of the second hydraulic pump and causes the working fluid of the second hydraulic pump to converge with the working fluid which is supplied from the first hydraulic pump to the arm cylinder; a recycle valve that is disposed in the flow path between the working fluid inlet port of the first arm control valve and a hydraulic tank; and a second boom control valve spool having a parallel pressure section in which the boom-up pilot pressure does not increase with respect to the boom-up strokes during the simultaneous boom-up and arm-in operation.

Apparatus and method for controlling a pump flow of heavy construction equipment

公开的是用于控制重型施工装备的泵流量的设备，该设备具有连接到发动机上用于根据工作杆的操纵量驱动工作装置的变量泵，和用于通过检测液压流体的温度来冷却液压流体，并可变地控制冷却风扇的速度的冷却控制装置，该冷却控制装置通过根据液压流体的温度可变地控制液压流体的循环量及冷却风扇速度的可变控制，能够确保快速和有效的冷却性能。如果由于环境温度升高和液压流体温度的过度升高，而试图停止重型施工装备的工作并快速冷却液压流体，则该设备控制泵流量，将其保持在快速冷却所需要的循环流量，因此而获得液压流体的有效冷却。

Shovel

본 발명의 실시예에 따른 유압쇼벨은, 메인펌프(14)와, 선회유압모터(21)를 포함하는 유압액추에이터와, 메인펌프(14)와 유압액추에이터의 사이의 작동유의 흐름을 제어하는 컨트롤밸브(17)와, 메인펌프(14)와 컨트롤밸브(17)의 사이, 및, 선회유압모터(21)와 컨트롤밸브(17)의 사이로 작동유를 방출할 수 있도록 접속되는 어큐뮬레이터부(42)를 구비한다. 어큐뮬레이터부(42)는, 메인펌프(14)의 상류로 작동유를 방출 가능하다.

System for controlling construction machine and method for controlling construction machine

A control system for construction machinery, includes a hydraulic pump, at least one control valve installed in a center bypass line connected to the hydraulic pump and configured to control a flow direction of a working oil discharged from the hydraulic pump to selectively supply the working oil to an actuator, a bypass control valve installed downstream from the control valve in the center bypass line to variably control an amount of the working oil draining to a drain tank through the center bypass line, and a controller configured to control operations of the hydraulic pump and the bypass control valve according to a manipulation signal of an operator and to open the bypass control valve according to pump peak occurrence to reduce a pump peak.

Hydraulic cylinder with end position damping

valve assembly

Es wird eine Ventilanordnung (1) vorgeschlagen, die über eine Ventilbatterie (6) verfügt, die mit mehreren elektro-pneumatisch vorgesteuerten Wegeventilen (7) ausgestattet ist, wobei jedes Wegeventil (7) über eine VorsteuerVentileinrichtung (29) verfügt, die über einen Vorsteuer-Versorgungskanal (32) an ein elektrisch betätigbares Sicherheitsventil (33) angeschlossen ist. Das Sicherheitsventil (33) kann den Vorsteuer-Versorgungskanal (32) in einer Einspeisestellung mit einem Vorsteuer-Einspeisekanal (34) und in einer Entlüftungsstellung mit einem Vorsteuer-Entlüftungskanal verbinden. Die Betriebsbereitschaft des Sicherheitsventils (33) kann mit einer Entlüftungsdiagnosefunktion und/oder Belüftungsdiagnosefunktion der Ventilanordnung (1) überwacht werden, wobei an der Überwachung eine Auswerteelektronik (48) mitwirkt. Bei der Entlüftungsdiagnosefunktion kann überwacht werden, ob die Entlüftungsfunktion des Sicherheitsventils (33) gegeben ist, wenn es mittels eines elektrischen Ausschaltsignals (AS) in die Entlüftungsstellung umgeschaltet wird. Die Belüftungsdiagnosefunktion erlaubt eine dahingehende Prüfung, ob beim Umschalten des Sicherheitsventils (33) in die Einspeisestellung unerwünscht ein erhöhter Fluiddruck im Vorsteuer-Versorgungskanal (32) ansteht. A valve arrangement (1) is proposed which has a valve battery (6) which is equipped with a number of electro-pneumatically pilot-controlled directional valves (7), each directional valve (7) having a pilot control valve device (29) which has a pilot control - The supply channel (32) is connected to an electrically operated safety valve (33). The safety valve (33) can connect the pilot control supply channel (32) in a feed position to a pilot control feed channel (34) and in a ventilation position to a pilot control ventilation channel. The operational readiness of the safety valve (33) can be monitored with a venting diagnostic function and/or ventilation diagnostic function of the valve arrangement (1), ...

Slewing type construction machine

Provided is a slewing type construction machine including an upper slewing body and a slewing speed sensor that detects a slewing speed of the upper slewing body, the construction machine enabling accurate control to be achieved regardless of an error in output from the slewing speed sensor. The construction machine includes an upper slewing body, a slewing motor (8), a hydraulic pump (7), a control valve (10), a slewing operation device (11), a slewing brake (12), a slewing speed sensor (27), a slewing operation detector (26) that detects an operation applied to the slewing operation device to output a slewing operation signal, and a controller (17). The controller (17) stores, during a slewing operation, a slewing speed detected by the slewing speed sensor (27) at set time intervals, actuates the slewing brake (12) based on a neutral return operation of the slewing operation device (11), and resets a stored value of the slewing speed that is stored during actuation of the slewing brake, to zero.