公开(公告)号：US09835180B2

公开(公告)日：2017-12-05

申请号：US14763000

申请日：2013-11-15

Applicant: Hitachi Construction Machinery Tierra Co., Ltd.

Inventor： Kiwamu Takahashi ,  Shingo Kishimoto ,  Yoshifumi Takebayashi ,  Kazushige Mori ,  Natsuki Nakamura

IPC: F16D31/02 ,  F15B11/16 ,  F15B13/02 ,  E02F9/22

CPC classification number: F15B11/165 ,  E02F9/2232 ,  E02F9/2253 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/163 ,  F15B11/168 ,  F15B13/026 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/30535 ,  F15B2211/329 ,  F15B2211/40515 ,  F15B2211/428 ,  F15B2211/50536 ,  F15B2211/6058 ,  F15B2211/6355 ,  F15B2211/67 ,  F15B2211/7135

Abstract: An object of the invention is to achieve a travel speed known in the art during travelling operation, improve energy efficiency by reducing energy loss, and obtain favorable travel operability less susceptible to effects from variations in a travel load and changes in a pump delivery pressure when travelling operation is performed through operation of a travel lever over a half stroke range or less. A variable restrictor valve 80 is disposed in parallel with a flow sensing valve 50 of an engine speed sensing valve unit 13. A travel pilot pressure is adapted to act in an opening direction of the variable restrictor valve 80. The variable restrictor valve 80 is set to have a continuously increasing opening area from a full closure to a maximum with an increasing travel pilot pressure. Travel flow control valves 6d and 6e have an opening area that allows a predetermined flow rate QT required for traveling to be obtained even when a target LS differential pressure is decreased to a second specified value Pa3 when the travel lever is fully operated. In a first half of a spool stroke, the travel flow control valves 6d and 6e have an opening area approximate to an opening area of comparative example 1.

公开(公告)号：US09726203B2

公开(公告)日：2017-08-08

申请号：US14538122

申请日：2014-11-11

Applicant: Robert Bosch GmbH

Inventor： Steffen Knapper

IPC: F15B11/16 ,  F15B13/06 ,  F15B13/02

CPC classification number: F15B13/06 ,  F15B11/163 ,  F15B11/165 ,  F15B13/028 ,  F15B2211/20553 ,  F15B2211/30535 ,  F15B2211/3054 ,  F15B2211/30555 ,  F15B2211/3111 ,  F15B2211/3127 ,  F15B2211/455 ,  F15B2211/6051 ,  F15B2211/6058 ,  F15B2211/652 ,  Y10T137/85986

Abstract: A hydraulic control assembly for a plurality of consumers includes, for each consumer, a supply metering orifice configured to control fluid flow. A flow-sensing fluid-flow-path extends over detection orifices positioned hydraulically in series, whereby a detection orifice is assigned to each supply metering orifice. The fluid-flow-path is connected to a hydraulic pump upstream of the detection orifices, and a control device of the hydraulic pump downstream of the detection orifices. Each detection orifice is configured to close the fluid-flow-path upon detecting a fluid supply deficiency for a corresponding consumer, whereby the control device is configured to interact with the fluid-flow-path such that fluid flow from the hydraulic pump is increased. When no customers have a supply deficiency, the fluid-flow-path over the detection orifices is fully opened, and the control device is configured to reduce fluid flow from the hydraulic pump.

公开(公告)号：US20170121940A1

公开(公告)日：2017-05-04

申请号：US14916368

申请日：2015-10-28

Applicant: KOMATSU LTD.

Inventor： Tadashi Kawaguchi ,  Teruo Akiyama ,  Koji Saito ,  Takayuki Watanabe ,  Noboru Iida

IPC: E02F9/22 ,  F15B21/08 ,  F15B11/08 ,  F15B13/04 ,  E02F3/32 ,  E02F9/12

CPC classification number: E02F9/22 ,  E02F3/32 ,  E02F3/435 ,  E02F9/123 ,  E02F9/2095 ,  E02F9/2217 ,  E02F9/2228 ,  E02F9/2242 ,  E02F9/2292 ,  E02F9/2296 ,  F15B11/08 ,  F15B11/163 ,  F15B11/17 ,  F15B13/0401 ,  F15B21/08 ,  F15B2211/20523 ,  F15B2211/20576 ,  F15B2211/30595 ,  F15B2211/35 ,  F15B2211/7135 ,  F15B2211/7142

Abstract: A drive device of a construction machine includes a pump passage connected to a hydraulic pump, first and second supply passages connected to the pump passage, first and second passages connected to the first supply passage, third and fourth passages connected to the second supply passage, a first valve connected to the first and third passages, a second valve connected to the second and fourth passages, a first bucket passage connecting the first passage to a cap-side space of the bucket cylinder through the first valve, a second bucket passage connecting the third passage to a rod-side space of the bucket cylinder through the first valve, a first arm passage connecting the second passage to a rod-side space of an arm cylinder through the second valve, and a second arm passage connecting the fourth passage to a cap-side space of the arm cylinder through the second valve.

公开(公告)号：US20170108015A1

公开(公告)日：2017-04-20

申请号：US14918146

申请日：2015-10-20

Applicant: Caterpillar Inc.

Inventor： Andrew J. Kleitsch

IPC: F15B13/04 ,  F15B11/16 ,  F15B13/044

CPC classification number: F15B11/163 ,  E02F9/2228 ,  E02F9/2296 ,  F15B11/006 ,  F15B2211/20546 ,  F15B2211/30535 ,  F15B2211/30575 ,  F15B2211/50536 ,  F15B2211/528 ,  F15B2211/6306 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6316 ,  F15B2211/6346

Abstract: A hydraulic system includes a source of pressurized fluid, a plurality of fluid actuators, each fluid actuator associated with an implement control system for hydraulically controlling the fluid actuator, and a load sense signal conditioning passageway fluidly connecting each of the implement control systems and configured to facilitate flow sharing between each of the implement control systems. Each of the fluid actuators includes a first chamber and a second chamber, and each of the implement control systems includes: a head-end IM supply valve configured to selectively fluidly connect the source with the first chamber; a rod-end IM supply valve configured to selectively fluidly connect the source with the second chamber; and a load compensating valve configured to control a pressure of a fluid directed between the source and the head-end IM supply and rod-end IM supply valves in response to a load acting on the fluid actuator.

公开(公告)号：US20170074293A1

公开(公告)日：2017-03-16

申请号：US14854755

申请日：2015-09-15

Applicant: HUSCO International, Inc.

Inventor： CASEY BUSCHKOPF ,  DARRELL HESSE ,  JOSEPH L PFAFF ,  JACOB BALLWEG ,  ERIC P HAMKINS

IPC: F15B13/02

CPC classification number: F15B11/163 ,  F15B11/162 ,  F15B2211/30535 ,  F15B2211/351 ,  F15B2211/40507 ,  F15B2211/40515 ,  F15B2211/40569 ,  F15B2211/41509 ,  F15B2211/50554 ,  F15B2211/5151 ,  F15B2211/565 ,  F15B2211/781

Abstract: A hydraulic control valve assembly to be integrated into a pressure compensated load sensing system including a fluid source is provided. The hydraulic control valve assembly includes a first working unit to control a first hydraulic function of a machine. The first working unit includes a first directional and return flow control in the form of a first spool, a first function flow control to selectively communicate a working pressure of the first function to the fluid source, and a first downstream flow control. The hydraulic control valve assembly further includes a second working unit arranged downstream of the first working unit. The second working unit to control a second hydraulic function of the machine. The first downstream flow control to selectively restrict a flow a fluid from the fluid source to the second working unit.

Abstract translation: 提供了集成到包括流体源的压力补偿负载感测系统中的液压控制阀组件。 液压控制阀组件包括用于控制机器的第一液压功能的第一工作单元。 第一工作单元包括第一卷轴形式的第一定向和回流控制，用于选择性地将第一功能的工作压力传达到流体源的第一功能流控制和第一下游流控制。 液压控制阀组件还包括布置在第一工作单元下游的第二工作单元。 第二个工作单元控制机器的第二个液压功能。 第一下游流量控制器选择性地限制流体从流体源流到第二工作单元。

公开(公告)号：US20170067226A1

公开(公告)日：2017-03-09

申请号：US15122789

申请日：2015-06-10

Applicant: HITACHI CONSTRUCTION MACHINERY TIERRA CO., LTD.

Inventor： Kiwamu TAKAHASHI ,  Kazushige MORI ,  Masamichi ITO ,  Yoshifumi TAKEBAYASHI ,  Natsuki NAKAMURA ,  Yasuharu OKAZAKI ,  Kenji YAMADA

IPC: E02F9/20 ,  E02F9/22 ,  F15B13/02 ,  F15B11/16 ,  F15B13/06

CPC classification number: E02F9/2062 ,  E02F3/325 ,  E02F3/964 ,  E02F9/2225 ,  E02F9/2228 ,  E02F9/2232 ,  E02F9/2235 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/162 ,  F15B11/163 ,  F15B11/165 ,  F15B13/024 ,  F15B13/06 ,  F15B2211/20507 ,  F15B2211/20546 ,  F15B2211/20553 ,  F15B2211/30535 ,  F15B2211/40576 ,  F15B2211/50518 ,  F15B2211/513 ,  F15B2211/5151 ,  F15B2211/55 ,  F15B2211/6051 ,  F15B2211/6055 ,  F15B2211/7135

Abstract: In a hydraulic driving system for construction machines, when track motors 3f and 3g are operated and the delivery pressure of a main pump 2 increases to a second value PS2 of the set pressure of a main relief valve 14, the set pressure of a signal pressure relief valve 16 increases from a third value PA1 to a fourth value PA2, which is smaller than the second value PS2 of the set pressure of the main relief valve 14, the difference between the second value PS2 and the fourth value PA2 being smaller than the target LS differential pressure. With such a structure, even if one of actuators reaches the stroke end and the delivery pressure of the hydraulic pump rises to the set pressure of the main relief valve, the other actuators do not stop, and further when the main relief valve is configured to increase the set pressure during operation of a specific actuator, the load pressure of the specific actuator does not increase to the increased set pressure of the main relief valve.

Abstract translation: 在用于施工机械的液压驱动系统中，当履带马达3f和3g被操作并且主泵2的输送压力增加到主溢流阀14的设定压力的第二值PS2时，信号压力的设定压力 安全阀16从第三值PA1增加到小于主溢流阀14的设定压力的第二值PS2的第四值PA2，第二值PS2和第四值PA2之间的差小于 目标LS差压。 通过这样的结构，即使一个致动器到达行程端，液压泵的输送压力上升到主安全阀的设定压力，其他的执行器也不会停止，而当主安全阀配置为 增加特定执行机构运行时的设定压力，特定执行器的负载压力不会增加到主溢流阀的设定压力增加。

公开(公告)号：US20160376769A1

公开(公告)日：2016-12-29

申请号：US15262500

申请日：2016-09-12

Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.

Inventor： Kazushige MORI ,  Yasutaka TSURUGA ,  Kiwamu TAKAHASHI ,  Yoshifumi TAKEBAYASHI

IPC: E02F9/22 ,  E02F9/02 ,  F15B11/16

CPC classification number: E02F9/2267 ,  E02F3/325 ,  E02F3/964 ,  E02F9/02 ,  E02F9/2225 ,  E02F9/2228 ,  E02F9/2232 ,  E02F9/2235 ,  E02F9/2271 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  E02F9/267 ,  F04B17/03 ,  F15B11/163 ,  F15B11/165 ,  F15B13/026 ,  F15B19/002 ,  F15B2211/20523 ,  F15B2211/20546 ,  F15B2211/20553 ,  F15B2211/30535 ,  F15B2211/3111 ,  F15B2211/3116 ,  F15B2211/323 ,  F15B2211/355 ,  F15B2211/522 ,  F15B2211/528 ,  F15B2211/5756 ,  F15B2211/6054 ,  F15B2211/7058 ,  F15B2211/7135 ,  F15B2211/782

Abstract: A hydraulic drive system for a track device of crawler type has right and left hydraulic track motors. The hydraulic drive system is capable of correcting for skew occurring in the straight line traveling of the track device. A traveling test is conducted upon shipment from a factory. If skew is noted during the test, a plug disposed on the side of a valve opening-side pressure receiving portion of a pressure compensating valve for the track which is lower in speed is removed and, replaced with an adjusting mechanism-mounted plug having an adjusting pin. The pin is operated so as to strengthen a biasing force of a target compensating differential pressure adjusting spring. An opening in the pressure compensating valve is thereby corrected in an opening direction and a flow rate to one of the left and right track motors is thereby adjusted to be equal to the other motor.

公开(公告)号：US08479636B2

公开(公告)日：2013-07-09

申请号：US12449929

申请日：2008-01-18

Applicant: Winfried Rüb

Inventor： Winfried Rüb

IPC: F15B11/00

CPC classification number: F15B11/05 ,  E02F9/2285 ,  F15B11/163 ,  F15B2211/20538 ,  F15B2211/30535 ,  F15B2211/329 ,  F15B2211/40561 ,  F15B2211/6054 ,  F15B2211/6055 ,  F15B2211/6313 ,  F15B2211/6355 ,  Y10T137/87185

Abstract: A valve arrangement has an adjustable control valve (10) including a control slide (12) for actuating at least one consumer connection (A, B) and an LS control line. The differential pressure of two actuating pressures (xa, xb) serves for the actuation of the control slide (12). Since the actuating pressures (xa, xb) also actuate a logic valve, which in turn influences an additional valve, and/or actuates a pressure compensator connected upstream to the control valve (10), the difference of the two actuating pressures (xa, xb) initially displaces the control slide of the control valve. The higher or the lower of the two actuating pressures (xa, xb) either actuate the further valve in the form of the additional valve, and/or influences the pressure compensator.

Abstract translation: 阀装置具有可调控制阀（10），其包括用于致动至少一个消费者连接（A，B）和LS控制线的控制滑块（12）。 两个致动压力（xa，xb）的差压用于控制滑块（12）的致动。 由于致动压力（xa，xb）也致动逻辑阀，这又影响附加阀，和/或致动连接到控制阀（10）上游的压力补偿器，两个致动压力（xa， xb）最初移动控制阀的控制滑块。 两个致动压力（xa，xb）中的较高或较低者以另外的阀的形式致动另外的阀，和/或影响压力补偿器。

公开(公告)号：US20130153043A1

公开(公告)日：2013-06-20

申请号：US13330733

申请日：2011-12-20

Applicant: Wesley Payne

Inventor： Wesley Payne

IPC: F15B13/06 ,  F15B13/02 ,  F15B11/16

CPC classification number: F15B11/163 ,  F15B13/0402 ,  F15B13/0417 ,  F15B2211/30555 ,  F15B2211/6052 ,  F15B2211/6055 ,  Y10T137/0396

Abstract: A fluid system and method of operation provides flow force compensation and load sense functions. Each work circuit includes an actuator, a control valve, and a first valve. A valve element of a control valve includes main metering orifices sized and shaped to provide flow force compensation. A load sense check valve associated with a load pressure signal conduit is downstream of the load check valve. The load pressure signal conduit of each work circuit is in fluid communication with one another, and a greater of the load signal pressure of the work circuits is communicated to the load sense check valve of the other work circuit. The control valve associated the lesser load can permit flow forces to reduce the effective area of the orifice, which increases the pressure difference across the valve to maintain approximately constant flow to the actuator.

Abstract translation: 流体系统和操作方法提供流动力补偿和负载感测功能。 每个工作电路包括致动器，控制阀和第一阀。 控制阀的阀元件包括尺寸和形状适于提供流动力补偿的主计量孔。 与负载压力信号管道相关联的负载检测止回阀位于负载止回阀的下游。 每个工作回路的负载压力信号管道彼此流体连通，并且工作回路的较大的负载信号压力被传送到另一个工作回路的负载检测止回阀。 关联较小负载的控制阀可以允许流动力减小孔口的有效面积，这增加了阀门两端的压力差，从而保持大致恒定的流向致动器。

公开(公告)号：US20120180472A1

公开(公告)日：2012-07-19

申请号：US13385946

申请日：2012-03-15

Applicant: Jarmo Antero Harsia

Inventor： Jarmo Antero Harsia

IPC: F15B13/06 ,  F15B11/17

CPC classification number: F15B13/06 ,  F15B11/163 ,  F15B11/17 ,  F15B2211/20538 ,  F15B2211/20546 ,  F15B2211/253 ,  F15B2211/3116

Abstract: A fixed/variable hybrid system has modified constant flow open center hydraulic valves (“fixed/variable valves”), including an open center core, spools, a power core, and a tank galley. A small fixed displacement pump provides fluid at a constant rate to the open center core. A variable displacement piston pump provides fluid directly to the power core as needed. Activation of spools partially restricts the open center core causing an increase in fluid pressure that is communicated to the variable displacement piston pump's load sense signal port, causing the pump to increase fluid flow and pressure to the power core. Activated spools direct pressurized fluid from the power core to the applications through selected hydraulic ports. Activated spools also direct fluid flow from selected hydraulic ports via the tank galley to a hydraulic tank. Pumping the majority of fluid only on an as-needed basis results in significant efficiencies.

Abstract translation: 固定/可变混合动力系统具有改变的恒定流量开放式中心液压阀（“固定/可变阀”），包括开放的中心芯，线轴，动力芯和罐式厨房。 小型固定排量泵以恒定速率向开放中心芯提供流体。 可变排量活塞泵根据需要将流体直接提供给动力芯。 阀芯的激活部分地限制开放中心芯，从而导致流体压力的增加，该流体压力传递到可变排量活塞泵的负载感测信号端口，导致泵增加对动力芯的流体流量和压力。 活动阀芯通过选定的液压端口将加压流体从动力芯直接运送到应用中。 活动的卷轴还可以将流体从选定的液压端口通过罐式厨房引导到液压油箱。 仅在需要的基础上泵送大部分流体导致显着的效率。