公开(公告)号：US20240343530A1

公开(公告)日：2024-10-17

申请号：US18751759

申请日：2024-06-24

Applicant: HUNAN SINOBOOM INTELLIGENT EQUIPMENT CO., LTD.

Inventor： Junhui ZOU ,  Guoliang LIU ,  Wei SHI

IPC: B66C23/00 ,  F15B11/05 ,  F15B13/02

CPC classification number: B66C23/54 ,  F15B11/055 ,  F15B13/026 ,  F15B2211/253

Abstract: A control method for controlling retraction of a boom is applied to a hydraulic system which combines retraction of the boom by self-weight with retraction of the boom by pressure. The control method includes: when the boom is retracted, controlling the self-weight retraction proportional valve to be at a maximum opening; obtaining an actual speed at which the boom is retracted; controlling a rotation speed of the pressure retraction motor to rise or an opening degree of the pressure retraction proportional valve to increase when the actual speed is less than a preset speed; and controlling the rotation speed of the pressure retraction motor to reduce or the opening degree of the pressure retraction proportional valve to decrease when the actual speed is greater than the preset speed.

公开(公告)号：US11988185B2

公开(公告)日：2024-05-21

申请号：US17739293

申请日：2022-05-09

Applicant: Sun Hydraulics, LLC

Inventor： Bernd Zähe ,  Steven J. Meislahn ,  Hailee Morgan

IPC: F03B13/00 ,  F15B1/26 ,  F15B13/02 ,  F15B15/00 ,  F15B21/14 ,  F16K11/07 ,  F16K17/04 ,  F16K37/00 ,  G01F1/115 ,  G01F15/00 ,  G01F15/06 ,  H02K7/18

CPC classification number: F03B13/00 ,  F15B13/02 ,  F15B13/026 ,  F15B15/00 ,  F15B21/14 ,  F16K11/07 ,  F16K17/048 ,  F16K37/005 ,  G01F1/115 ,  G01F1/1155 ,  G01F15/005 ,  G01F15/066 ,  H02K7/1823 ,  F05B2220/706

Abstract: An example valve includes: a seat member; a spool configured to be seated on the seat member to block fluid flow from a first port to a second port when the valve is in a closed state, wherein fluid at the first port applies a fluid force on the spool; a spring applying a biasing force on the spool toward the seat member, wherein as the fluid force overcomes the biasing force, the spool moves in the proximal direction off the seat member, thereby allowing fluid flow from the first port to the second port through a flow area formed between the spool and the seat member; a turbine configured to rotate as fluid flowing through the flow area flows downstream across the turbine; and an electric generator coupled to the turbine, such that rotation of the turbine causes the electric generator to generate electric power.

公开(公告)号：US20240102494A1

公开(公告)日：2024-03-28

申请号：US18476168

申请日：2023-09-27

Applicant: Dana Motion Systems Italia S.R.L.

Inventor： Manuel BEZZI

IPC: F15B13/02 ,  F15B1/26

CPC classification number: F15B13/025 ,  F15B1/265 ,  F15B13/026 ,  F15B13/027

Abstract: The present disclosure relates to a hydraulic circuit, comprising:



a motion control valve including a valve spool and a hydraulic actuator for actuating the valve spool, and
a hydraulic control device having an outlet fluidically connected to the hydraulic actuator, the hydraulic control device comprising a pressure-reducing valve or a pressure compensated flow control valve.

公开(公告)号：US20230323945A1

公开(公告)日：2023-10-12

申请号：US18042341

申请日：2021-09-21

Applicant: JATCO Ltd ,  NISSAN MOTOR CO., LTD.

Inventor： Hisao NOBU

IPC: F16H61/662 ,  F15B13/02 ,  F16H9/18 ,  F16H45/02

CPC classification number: F16H61/662 ,  F15B13/026 ,  F16H2045/0215 ,  F16H45/02 ,  F16H9/18

Abstract: A hydraulic control circuit includes a pressure regulator valve, a first pilot valve, a second pilot valve, and a third pilot valve. A first pilot pressure is introduced as a source pressure into the primary solenoid valve that generates a primary signal pressure and a secondary solenoid valve that generates a secondary signal pressure. A second pilot pressure is introduced as a source pressure into a lock-up solenoid valve that generates the lock-up signal pressure. A third pilot pressure is introduced as a damping pressure into a primary regulator valve that controls a primary pulley pressure according to the primary signal pressure, and into a secondary regulator valve that controls a secondary pulley pressure according to the secondary signal pressure.

公开(公告)号：US09926947B2

公开(公告)日：2018-03-27

申请号：US14700886

申请日：2015-04-30

Applicant: Montana Hydraulics, LLC

Inventor： Chris Villar ,  Matthew Warrington

IPC: F04B9/133 ,  F15B13/02 ,  F15B3/00 ,  F04B9/131 ,  F15B13/04

CPC classification number: F15B13/026 ,  F04B9/131 ,  F04B9/133 ,  F15B3/00 ,  F15B13/0407

Abstract: An air-to-hydraulic fluid pressure amplifier comprising an air cylinder having an internal reciprocating air piston; a first hydraulic cylinder having a first valve fitting and a first internal hydraulic ram that is slidably positioned within the first hydraulic cylinder; a second hydraulic cylinder having a second valve fitting and a second internal hydraulic ram that is slidably positioned within the second hydraulic cylinder; a first flow control valve and a second flow control valve; a first plunger-operated pilot valve and a second plunger-operated pilot valve. Each of the first and second plunger-operated pilot valves comprises an inlet port, an outlet port, a plunger, a barrel, and a compression spring.

公开(公告)号：US20140216024A1

公开(公告)日：2014-08-07

申请号：US14170755

申请日：2014-02-03

Applicant: Robert Bosch GmbH

Inventor： Karl Krug-Kussius

IPC: F15B13/02

CPC classification number: F15B13/026 ,  F15B11/0445 ,  F15B13/042 ,  F16H61/4157 ,  F16K17/10 ,  F16K31/383 ,  Y10T137/7762

Abstract: A brake valve is insertable into a working line of a hydrostatic travel drive. The brake valve has a main stage with a first port connected to a variable displacement pump of the drive system and a second port connected to a motor of the drive system. The main stage has a slide piston positionable in a valve bore. In a freewheeling position, a connection is maximally open with minimal throttling between the two ports. In pressure-reducing positions, a regulable, throttled connection is open from the second to the first port to brake the motor. In pressure-limiting positions, a regulable, throttled connection is open from the first to the second port to begin to throttle a pressure medium flow from the variable displacement pump to a pressure protection mechanism. The positions lie on a center line of the main stage along which the slide piston is movable.

Abstract translation: 制动阀可插入静液压传动驱动器的工作线中。 制动阀具有主级，其具有连接到驱动系统的可变排量泵的第一端口和连接到驱动系统的电动机的第二端口。 主台具有可定位在阀孔中的滑动活塞。 在续流位置，连接最大程度地打开，两个端口之间的节流最少。 在减压位置，可调节节流的连接从第二个端口打开到第一个端口，以制动电动机。 在压力限制位置，可调节的节流连接从第一至第二端口打开以开始节流从可变排量泵到压力保护机构的压力介质流。 位置位于主台的中心线，滑动活塞沿着该中心线可移动。

公开(公告)号：US20140208734A1

公开(公告)日：2014-07-31

申请号：US14239361

申请日：2012-12-11

Applicant: KUBOTA CORPORATION

Inventor： Hiroshi Horii

IPC: F15B13/02 ,  F15B7/00

CPC classification number: F15B13/026 ,  E02F3/964 ,  E02F9/2225 ,  E02F9/2239 ,  E02F9/2282 ,  E02F9/2285 ,  E02F9/2292 ,  E02F9/2296 ,  F15B7/003 ,  F15B11/163 ,  F15B2211/20546 ,  F15B2211/253 ,  F15B2211/30555 ,  F15B2211/6051 ,  F15B2211/651 ,  F15B2211/652 ,  F15B2211/7135 ,  F15B2211/8613

Abstract: Provided is a load sensing system for controlling a discharge pressure of the hydraulic pump so as to render a differential pressure obtained by subtracting a maximum load pressure among the hydraulic actuators from a discharge pressure of the hydraulic pump to be a constant pressure, and there are provided: a first load pressure flow passage which introduces load pressures of the hydraulic actuators to be outputted to a PLS transmission line which transmits the maximum load pressure among the hydraulic actuators at the time of activating the hydraulic actuators; and a second load pressure flow passage which is a flow path for introducing the load pressures of the hydraulic actuators to be outputted to the PLS transmission line during operation after activations of the hydraulic actuators, and wherein a flow rate of the pressure oil therein is reduced than that in the first load pressure flow passage.

Abstract translation: 提供了一种用于控制液压泵的排出压力的负载感测系统，以便通过从液压泵的排出压力减去液压致动器中的最大负载压力而获得的压差为一定压力，并且存在 提供：第一负载压力流路，其将要输出的液压致动器的负载压力引导到在启动液压致动器时在液压致动器之间传递最大负载压力的PLS传输线; 以及第二负载压力流路，其是在液压致动器激活之后的操作期间将用于输出到PLS传输线的液压致动器的负载压力引入的流路，并且其中压力油的流量减小 比第一负载压力流通道中的流量高。

公开(公告)号：US20130061955A1

公开(公告)日：2013-03-14

申请号：US13635644

申请日：2010-11-22

Applicant: Gregory Coolidge

Inventor： Gregory Coolidge

IPC: F16K31/12

CPC classification number: G05D16/10 ,  F15B13/026 ,  F15B13/0417 ,  F15B2211/3054 ,  F15B2211/40569 ,  F15B2211/50554 ,  F15B2211/5153 ,  F15B2211/55 ,  F15B2211/653 ,  Y10T137/7762 ,  Y10T137/7784

Abstract: An assembly of valve sections 10 includes an inlet section 12, an outlet section 14, a working section 16, and a working section 18. The working section 16 is a conventional pressure compensated working section. The working section 18 includes a directional control valve 21, a pressure compensator valve 50, and a pressure limiter valve 52. The valves 50 and 52 are of integral construction, such that each is an essential part to complete the other. The pressure compensator valve 50 includes a pressure compensator spool 60 movable between an opened position (FIGS. 2 and 5) and a closed position (FIGS. 4 and 6) in response to a pressure differential across the spool. The pressure limiter valve 52 includes a pressure limiter spool 76 that moves to an open position to change the pressure differential and close the pressure compensator valve when a selected limit pressure is reached.

Abstract translation: 阀部分10的组件包括入口部分12，出口部分14，工作部分16和工作部分18.工作部分16是传统的压力补偿工作部分。 工作部分18包括方向控制阀21，压力补偿阀50和压力限制阀52.阀50和52是整体结构，每个都是完成另一个的基本部分。 压力补偿阀50包括压力补偿器阀芯60，该压力补偿器阀芯60在打开位置（图2和图5）和关闭位置（图4和图6）之间可响应于阀芯上的压差而运动。 压力限制阀52包括压力限制阀芯76，当限制压力达到选定极限压力时，压力限制阀芯76移动到打开位置以改变压差并关闭压力补偿阀。

公开(公告)号：US20100263363A1

公开(公告)日：2010-10-21

申请号：US12748954

申请日：2010-03-29

Applicant: Georg Neumair ,  Johann Konig

Inventor： Georg Neumair ,  Johann Konig

IPC: F15B13/04 ,  F16K15/00

CPC classification number: F15B11/055 ,  F15B13/026 ,  F15B2211/40553 ,  F15B2211/41572 ,  F15B2211/45 ,  Y10T137/7904

Abstract: In a hydraulic control device H comprising a pressure source P which can be switched on and switched off, a reservoir R and a pressure switch W located in a discharge path 13 from a valve assembly V to the reservoir R, which pressure switch W either connects the valve assembly V with the reservoir R or blocks the valve assembly V versus the reservoir R, the pressure switch W contains a displaceable control member 16 which is actuated in a first switching direction by a spring 17 and a pilot pressure originating from the pressure P1 acting at the valve assembly V and in a second switching direction to a control position blocking the discharge path 13 by a pilot pressure originating from the supply pressure of the pressure source, the pressure switch W is designed as a 2/2-multi-way seat valve 16 operating with a blocking position without leakage. A valve member 24 forms the control member 16 and co-operates with a valve seat 25 arranged in the discharge path 13. The pressure source P and the valve assembly V are permanently connected via a main channel 10, 11 containing a restrictor D. The discharge path 13 branches off from the main channel 10, 11, 12 between the valve assembly V and the restrictor D. The pilot pressure actuating the valve member 26 in the switching direction towards the valve seat 25 originates from the supply pressure taken between the pressure source P and the restrictor D.

Abstract translation: 在包括可被接通和关闭的压力源P的液压控制装置H中，存储器R和压力开关W，其位于从阀组件V到储存器R的排出通道13中，压力开关W连接 具有储存器R的阀组件V或阻塞阀组件V相对于储存器R，压力开关W包含可移动的控制构件16，该可移动控制构件16通过弹簧17在第一开关方向上致动，并且来自压力P1的先导压力 作用在阀组件V上，并且在第二切换方向上，通过来自压力源的供应压力的先导压力阻塞排放通道13的控制位置，压力开关W被设计为2/2多路 座阀16以阻塞位置操作而不泄漏。 阀构件24形成控制构件16并与布置在排出路径13中的阀座25配合。压力源P和阀组件V经由包含限流器D的主通道10,11永久连接。 排出通道13从阀组件V和限流器D之间的主通道10,11,12分支。致动阀构件26的朝向阀座25的切换方向的先导压力来源于压力 源P和限流器D.

公开(公告)号：US20230349397A1

公开(公告)日：2023-11-02

申请号：US18305600

申请日：2023-04-24

Applicant: Dana Motion Systems Italia S.r.l.

Inventor： Stefano FASANO ,  Daniele DODI ,  Bartoli MAURIZIO ,  Alessandro SASSI

IPC: F15B11/17 ,  F15B13/02

CPC classification number: F15B11/17 ,  F15B13/026 ,  F15B2211/20576

Abstract: The present document relates to a hydraulic system having a first hydraulic pump, a second hydraulic pump, at least one hydraulic actuator, a low-pressure tank, and a pressure controlled flow compensating valve. A high-pressure port of the first hydraulic pump and a high-pressure port of the second hydraulic pump are fluidly connected or fluidly connectable to the at least one hydraulic actuator. The high-pressure port of the second hydraulic pump is selectively fluidly connectable to the low-pressure tank via the flow compensating valve. The flow compensating valve is controllable by or based on one or more of: a hydraulic pressure provided by the first hydraulic pump, a hydraulic pressure provided by the second hydraulic pump, and a hydraulic pressure at a fluid port of the at least one hydraulic actuator.