公开(公告)号：US20170241555A1

公开(公告)日：2017-08-24

申请号：US15518821

申请日：2015-10-27

申请人： KYB Corporation

发明人： Shota MIZUKAMI ,  Takeshi TERAO ,  Akio MATSUURA

IPC分类号： F16K11/07 ,  F15B13/04 ,  F15B13/02

CPC分类号： F16K11/0716 ,  F15B13/02 ,  F15B13/0402 ,  F15B13/0417 ,  F15B2211/30555 ,  F15B2211/3144 ,  F15B2211/329 ,  F15B2211/6051 ,  F15B2211/651

摘要： A compensator spool of a load sensing valve device includes a pressure chamber, a compensator throttle portion, a pressure introduction chamber, a pressure introduction port, a maximum load pressure introduction chamber, and a selector valve. A groove is formed around the pressure introduction port, and a groove moves relatively between a passage communicating with an actuator to reduce an opening area of the pressure introduction port when the compensator spool moves.

公开(公告)号：US09377034B2

公开(公告)日：2016-06-28

申请号：US14239361

申请日：2012-12-11

申请人： KUBOTA CORPORATION

发明人： Hiroshi Horii

IPC分类号： F15B11/16 ,  F15B13/02 ,  E02F3/96 ,  E02F9/22 ,  F15B7/00

CPC分类号： 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

摘要： 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.

摘要翻译： 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：US20090064673A1

公开(公告)日：2009-03-12

申请号：US12094178

申请日：2006-11-10

申请人： Wolfgang Kauss

发明人： Wolfgang Kauss

IPC分类号： F15B13/16

CPC分类号： F15B11/05 ,  F15B11/028 ,  F15B11/165 ,  F15B11/168 ,  F15B2211/20546 ,  F15B2211/253 ,  F15B2211/30535 ,  F15B2211/329 ,  F15B2211/55 ,  F15B2211/6054 ,  F15B2211/651 ,  F15B2211/654 ,  F15B2211/7052 ,  F15B2211/7053 ,  F15B2211/7135 ,  F15B2211/76

摘要： A hydraulic control device according to the invention is of load-sensing design and serves to actuate a first hydraulic load and a second hydraulic load. Also provided are a first control valve for actuating the first hydraulic load and a second control valve for actuating the second hydraulic load. A first load signal can be measured on the basis of a load pressure with which the first hydraulic load is acted on, and a second load signal can be measured on the basis of a load pressure with which the second hydraulic load is acted on. Pressure medium from a pressure medium source can be supplied in parallel to the first control valve and to the second control valve. A load signal path can, in order to actuate an adjusting element which is assigned to the pressure medium source, be acted on with a highest presently measured load signal. A limiting device allows the second load signal to be limited to a predefined signal limit value. A switching means can be actuated by means of the second load signal such that, at the latest when the second load signal reaches the signal limit value, the signal conveyed on the load signal path is limited by the limiting device.

摘要翻译： 根据本发明的液压控制装置具有负载感测设计，并且用于致动第一液压负载和第二液压负载。 还提供了用于致动第一液压负载的第一控制阀和用于致动第二液压负载的第二控制阀。 可以基于第一液压负载的负载压力来测量第一负载信号，并且可以基于施加第二液压负载的负载压力来测量第二负载信号。 来自压力介质源的压力介质可以与第一控制阀和第二控制阀并联供应。 负载信号路径可以为了致动分配给压力介质源的调节元件，以当前测量的最高负载信号起作用。 限制装置允许第二负载信号被限制到预定义的信号极限值。 可以通过第二负载信号来致动切换装置，使得在最后当第二负载信号达到信号限制值时，在负载信号路径上传送的信号被限制装置限制。

公开(公告)号：US5291676A

公开(公告)日：1994-03-08

申请号：US824367

申请日：1992-01-23

申请人： Peter Beater ,  Alfred Krusche ,  Siegfried Schurawski

发明人： Peter Beater ,  Alfred Krusche ,  Siegfried Schurawski

IPC分类号： E02F9/22 ,  F15B11/04 ,  F15B11/16 ,  F15B13/04 ,  F15B13/042 ,  F16D31/02

CPC分类号： F16H61/4078 ,  F15B11/166 ,  F15B13/0417 ,  F15B13/0422 ,  F15B2211/3111 ,  F15B2211/329 ,  F15B2211/355 ,  F15B2211/40515 ,  F15B2211/455 ,  F15B2211/57 ,  F15B2211/575 ,  F15B2211/6355 ,  F15B2211/651 ,  F15B2211/7058 ,  F15B2211/75 ,  F16H2059/6846 ,  F16H61/4061

摘要： A hydraulic drive system has a consumer of hydraulic power connected to a pressure medium source, e.g., a hydraulic motor 1. The consumer can be actuated by a control valve 4 throttling in intermediate positions; its width of opening is determined by a pressure difference formed at the control valve 4. The pressure difference is derived from a control pressure to be prescribed and the load pressure of the consumer. The consumer can thus be driven with a definite power or a definite torque. To limit the movement speed of the consumer, it is proposed to reduce the control pressure as a function of the speed of movement. The control pressure is present in a control pressure line 7 or 8, which empty at a charging space of the control valve 4, active in the opening direction. A drain line 16 branches from the control pressure line 7 or 8, in which a multiway valve spring-loaded in the closing direction and throttling in intermediate positions is located. It is in working connection with a measuring device that detects the movement speed of the consumer by measuring the volume stream and which is formed of a restrictor 12 located in a line 5 or 6 between the pressure medium source and the consumer, and the line 13, 14 that branch off upstream and downstream.

摘要翻译： 液压驱动系统具有连接到压力介质源（例如液压马达1）的液压动力消耗器。消耗器可以由节流在中间位置的控制阀4致动; 其开口宽度由在控制阀4处形成的压力差确定。压力差由要规定的控制压力和消耗器的负载压力导出。 因此，消费者可以以确定的功率或确定的扭矩来驱动。 为了限制消费者的移动速度，建议根据运动速度来减小控制压力。 控制压力存在于控制压力管线7或8中，该控制压力管线7或8在控制阀4的打开方向活动的充电空间处空出。 排水管线16从控制压力管线7或8分支，其中位于关闭方向上弹簧加载的多通阀和位于中间位置的节流阀。 它与测量装置工作连接，该测量装置通过测量体积流并且由位于压力介质源和消耗者之间的管线5或6中的限流器12形成并检测消费者的移动速度，并且线13 14，分支上游和下游。

公开(公告)号：US4727793A

公开(公告)日：1988-03-01

申请号：US673162

申请日：1983-01-24

申请人： Lowell R. Hall

发明人： Lowell R. Hall

IPC分类号： E02F9/00 ,  E02F9/22 ,  F15B11/00 ,  F15B11/05 ,  F15B13/042 ,  C08F283/00

CPC分类号： E02F9/2225 ,  F15B11/055 ,  F15B2211/20538 ,  F15B2211/50536 ,  F15B2211/5157 ,  F15B2211/528 ,  F15B2211/56 ,  F15B2211/6051 ,  F15B2211/651 ,  F15B2211/652 ,  F15B2211/761 ,  F15B2211/8609

摘要： A signal valve (38) is connected to a supply conduit (16) connecting a pump (11) with a control valve (14) for transmitting an artificial load signal to a load signal chamber (34) of a pressure compensated unloader valve (27) when the control valve is at an operating position and the pressure in the supply conduit (16) is below a preselected value. This moves a valve member (31) of the unloader valve (27) to a blocking position causing essentially full pump flow to be directed to the hydraulic jack for decreasing the response time in situations wherein the hydraulic jack has cavitated and no positive load pressure signal is present.

摘要翻译： 信号阀（38）连接到连接泵（11）和控制阀（14）的供应管道（16），用于将人造负载信号传送到压力补偿卸载阀（27）的负载信号室（34） ）当控制阀处于操作位置并且供应管道（16）中的压力低于预选值时。 这将卸载阀（27）的阀构件（31）移动到阻塞位置，使得基本上完全的泵流被引导到液压千斤顶，以在液压千斤顶已经气蚀并且没有正负载压力信号的情况下减小响应时间 存在。

公开(公告)号：US20150059329A1

公开(公告)日：2015-03-05

申请号：US14390328

申请日：2012-04-17

申请人： Sang-Ki Bae ,  Jae-Hoon Lee

发明人： Sang-Ki Bae ,  Jae-Hoon Lee

IPC分类号： F15B11/05

CPC分类号： F15B11/055 ,  E02F9/123 ,  E02F9/2228 ,  E02F9/2235 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/165 ,  F15B2211/20546 ,  F15B2211/25 ,  F15B2211/253 ,  F15B2211/605 ,  F15B2211/6309 ,  F15B2211/6313 ,  F15B2211/6316 ,  F15B2211/65 ,  F15B2211/651 ,  F15B2211/6652 ,  F15B2211/7058 ,  F15B2211/7135 ,  F15B2211/78

摘要： A hydraulic system for a construction machine having a pressure compensation valve is disclosed, which improves operability when a combined operation of a swing device and an attachment is performed. The hydraulic system includes a hydraulic pump, attachment and swing operation devices, an attachment actuator and a swing motor connected to the hydraulic pump, a first control valve controlling hydraulic fluid being supplied to the actuator, a second control valve controlling hydraulic fluid being supplied to the swing motor, a check valve installed on a flow path for detecting load pressures of the actuator to take a maximum pressure of the load pressures, a first pressure compensation valve having an opening amount that is controlled by a difference between the maximum load sensing pressure and the pressure of a discharge flow path of the first control valve, a second pressure compensation valve having an opening amount that is controlled by a difference between the maximum load sensing pressure and the pressure of the discharge flow path of the second control valve, a maximum load pressure sensor detecting the pressure of a maximum load sensing pressure line, and a control unit controlling a discharge flow rate of the hydraulic pump, wherein the system is configured so that the swing load pressure is not connected to the first pressure compensation valve on the attachment side when a combined operation of the swing device and the attachment is performed.

摘要翻译： 公开了一种用于具有压力补偿阀的施工机械的液压系统，其在执行摆动装置和附件的组合操作时提高了可操作性。 液压系统包括液压泵，附接和摆动操作装置，附接致动器和连接到液压泵的回转马达，控制供应到致动器的液压流体的第一控制阀，控制液压流体的第二控制阀， 摆动马达，安装在流路上的止回阀，用于检测致动器的负载压力以承受最大压力的负载压力;第一压力补偿阀，其具有由最大负载感测压力 以及第一控制阀的排出流路的压力，具有由最大负荷感测压力和第二控制阀的排出流路的压力之间的差控制的开度的第二压力补偿阀， 检测最大负载感测压力线的压力的最大负载压力传感器和控制单元co 控制液压泵的排出流量，其中，当执行摆动装置和附件的组合操作时，系统构造成使得摆动负载压力未连接到附接侧上的第一压力补偿阀。

公开(公告)号：US20140208734A1

公开(公告)日：2014-07-31

申请号：US14239361

申请日：2012-12-11

申请人： KUBOTA CORPORATION

发明人： Hiroshi Horii

IPC分类号： F15B13/02 ,  F15B7/00

CPC分类号： 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

摘要： 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.

摘要翻译： 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：US08006490B2

公开(公告)日：2011-08-30

申请号：US12094178

申请日：2006-11-10

申请人： Wolfgang Kauss

发明人： Wolfgang Kauss

IPC分类号： F15B11/04 ,  F15B13/00

CPC分类号： F15B11/05 ,  F15B11/028 ,  F15B11/165 ,  F15B11/168 ,  F15B2211/20546 ,  F15B2211/253 ,  F15B2211/30535 ,  F15B2211/329 ,  F15B2211/55 ,  F15B2211/6054 ,  F15B2211/651 ,  F15B2211/654 ,  F15B2211/7052 ,  F15B2211/7053 ,  F15B2211/7135 ,  F15B2211/76

摘要： A hydraulic control device according to the invention is of load-sensing design and serves to actuate a first hydraulic load and a second hydraulic load. Also provided are a first control valve for actuating the first hydraulic load and a second control valve for actuating the second hydraulic load. A first load signal can be measured on the basis of a load pressure with which the first hydraulic load is acted on, and a second load signal can be measured on the basis of a load pressure with which the second hydraulic load is acted on. Pressure medium from a pressure medium source can be supplied in parallel to the first control valve and to the second control valve. A load signal path can, in order to actuate an adjusting element which is assigned to the pressure medium source, be acted on with a highest presently measured load signal. A limiting device allows the second load signal to be limited to a predefined signal limit value. A switching means can be actuated by means of the second load signal such that, at the latest when the second load signal reaches the signal limit value, the signal conveyed on the load signal path is limited by the limiting device.

摘要翻译： 根据本发明的液压控制装置具有负载感测设计，并且用于致动第一液压负载和第二液压负载。 还提供了用于致动第一液压负载的第一控制阀和用于致动第二液压负载的第二控制阀。 可以基于第一液压负载的负载压力来测量第一负载信号，并且可以基于施加第二液压负载的负载压力来测量第二负载信号。 来自压力介质源的压力介质可以与第一控制阀和第二控制阀并联供应。 负载信号路径可以为了致动分配给压力介质源的调节元件，以当前测量的最高负载信号起作用。 限制装置允许第二负载信号被限制到预定义的信号极限值。 可以通过第二负载信号来致动切换装置，使得在最后当第二负载信号达到信号限制值时，在负载信号路径上传送的信号被限制装置限制。

公开(公告)号：US07395664B2

公开(公告)日：2008-07-08

申请号：US11472503

申请日：2006-06-21

申请人： Andreas Brockmann ,  Michael Martens

发明人： Andreas Brockmann ,  Michael Martens

IPC分类号： F16D31/02

CPC分类号： F15B11/162 ,  F15B11/165 ,  F15B11/168 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/30535 ,  F15B2211/3144 ,  F15B2211/322 ,  F15B2211/327 ,  F15B2211/6054 ,  F15B2211/6058 ,  F15B2211/651 ,  F15B2211/653 ,  F15B2211/7053 ,  F15B2211/7058 ,  F15B2211/7142

摘要： Disclosed is a hydraulic system for utility vehicles, in particular agricultural tractors, for supplying primary and/or auxiliary pressure medium consumers (6, 11, 12) with pressure medium, comprising a pump (1), whose pressure and flow are controlled as a function of the load pressure of the pressure medium consumers by a pressure and flow controller (13) to which whenever auxiliary pressure medium consumers (11, 12) are operating, a higher load pressure compared to the actual load pressure is reported through an amplifier device. In order to obtain rapid response of an actuated auxiliary pressure medium consumer it is proposed that the amplifier device (29) consists of a proportionally controllable pressure reducing valve (39).

摘要翻译： 公开了一种用于多用途车辆，特别是农用拖拉机的液压系统，用于向压力介质​​供应初级和/或辅助压力介质消耗器（6,11,12），包括泵（1），其压力和流量被控制为 通过压力和流量控制器（13）对压力介质消耗器的负载压力的功能，当辅助压力介质消耗器（11,12）正在操作时，与实际负载压力相比，通过放大器装置报告较高的负载压力 。 为了获得致动的辅助压力媒体消费者的快速响应，建议放大器装置（29）由比例可控的减压阀（39）组成。

公开(公告)号：US20020157389A1

公开(公告)日：2002-10-31

申请号：US09936283

申请日：2001-09-12

发明人： Yasutaka Tsuruga ,  Takashi Kanai ,  Junya Kawamoto ,  Satoshi Hamamoto ,  Yasuharu Okazaki ,  Yukiaki Nagao

IPC分类号： F16D031/02

CPC分类号： E02F9/226 ,  E02F9/2203 ,  E02F9/2232 ,  E02F9/2285 ,  E02F9/2296 ,  F15B11/163 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/30505 ,  F15B2211/30535 ,  F15B2211/3111 ,  F15B2211/351 ,  F15B2211/6054 ,  F15B2211/651 ,  F15B2211/71 ,  F15B2211/75

摘要： In a hydraulic drive system in which a target compensated differential pressure for each of pressure compensating valves 21a, 21b is set in accordance with a differential pressure between a pump delivery pressure and a maximum load pressure, and a target LS differential pressure is set as a variable value depending on a revolution speed of an engine 1, a fixed throttle 32 and a signal pressure variable relief valve 33 are disposed in a maximum load pressure line 35. A relief setting pressure PLMAXnull of the signal pressure variable relief valve 33 is set so as to satisfy PLMAXnullnullPRnullPGRnullnull (where null is a value smaller than PGR) with respect to a target LS differential pressure PGR and a setting pressure PR of the main relief valve 30. Even when a load pressure of any one actuator reaches the setting pressure of the main relief valve during the combined operation in which a plurality of actuators are simultaneously driven, pressure compensating valves are not closed, the other actuators are not sped up, and good operability in the combined operation can be ensured.

摘要翻译： 在液压驱动系统中，根据泵输送压力和最大负载压力之间的压差设定压力补偿阀21a，21b中的每一个的目标补偿差压，并将目标LS压差设定为 可变值取决于发动机1的转速，固定节气门32和信号压力可变溢流阀33设置在最大负载压力线35中。设置信号压力可变溢流阀33的释放设定压力PLMAX' 以便相对于目标LS差压PGR和主溢流阀30的设定压力PR满足PLMAX'= PR-PGR +α（其中α是小于PGR的值）。即使当任何 一个执行器在组合操作期间达到主安全阀的设定压力，其中多个致动器同时被驱动，压力补偿阀不关闭，另一个致动器 rs不加速，可以确保组合操作的良好可操作性。