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公开(公告)号：EP2837834B1
公开(公告)日：2017-10-11
申请号：EP14176114.8
申请日：2014-07-08
Applicant: Linde Hydraulics GmbH & Co. KG
Inventor： Kraft, Wolfgang, Dr.
IPC: F15B13/044 , F15B13/04 , F16K1/44 , F16K11/10
CPC classification number: F15B13/0405 , F15B11/165 , F15B13/044 , F15B20/00 , F15B2211/30535 , F15B2211/3055 , F15B2211/355 , F15B2211/50518 , F15B2211/575 , F15B2211/6051 , F15B2211/6355 , F15B2211/65 , F15B2211/863 , F15B2211/875 , F16K11/105 , F16K17/048 , F16K31/0658
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公开(公告)号：EP1760325A3
公开(公告)日：2008-05-28
申请号：EP06009728.4
申请日：2006-05-11
Applicant: AGCO GmbH
Inventor： Brockmann, Andreas , Martens, Michael
IPC: F15B11/16
CPC classification number: F15B11/165 , F15B11/162 , F15B11/168 , F15B2211/253 , F15B2211/30535 , F15B2211/6054 , F15B2211/65 , F15B2211/7053 , F15B2211/7058
Abstract: 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), sucking from a pressure medium tank (3), the pump being controlled as a function of the load pressure of the pressure medium consumers and supplying a pump pressure exceeding the load pressure by a predetermined control pressure differential. In order to produce a first control pressure differential for operating a primary pressure medium consumer (6) its load pressure acts upon a pressure and flow controller (13) of the pump and in order to produce a second higher control pressure differential for operating an auxiliary pressure medium consumer (11, 12) a pressure exceeding their load pressure is produced by means of an amplifying circuit (29).
In order to obtain rapid response of an actuated primary pressure medium consumer and in order to prevent, under certain conditions due to thermal expansion, pressure medium from flowing to the pressure and flow controller of the pump and possibly causing unwanted restriction of the pump, it is proposed that the load pressure of a primary pressure medium consumer (6) and the pressure supplied by the amplifying circuit (29) can be fed via a shuttle valve (19) to the pressure and flow controller (13) of the pump (1) and that the load pressure reporting line (28) conducting the load pressure of an auxiliary pressure medium consumer (11, 12) is connected via a flow control valve (30) to the pressure medium tank (3).-
公开(公告)号：EP1106839B1
公开(公告)日：2004-07-28
申请号：EP00125635.3
申请日：2000-11-23
Applicant: Brevini Hydraulics S.p.A.
Inventor： Bovi, Claudio , Brevini, Renato
CPC classification number: F15B13/0417 , F15B11/163 , F15B2211/30535 , F15B2211/3127 , F15B2211/353 , F15B2211/50536 , F15B2211/5157 , F15B2211/6054 , F15B2211/6055 , F15B2211/65 , F15B2211/7142
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4.发明公开Hydraulische Steueranordnung zur Druckmittelversorgung von vorzugsweise mehreren hydraulischen Verbrauchern 有权为优选多个液压消费者的压力介质供给的液压控制装置，
公开(公告)号：EP1170510A3
公开(公告)日：2003-10-29
申请号：EP01110563.2
申请日：2001-04-30
Applicant: Bosch Rexroth AG
Inventor： Büttner, Peter , Miikkulainen, Tatu
CPC classification number: F15B11/165 , F15B21/047 , F15B2211/20553 , F15B2211/253 , F15B2211/30535 , F15B2211/3111 , F15B2211/3144 , F15B2211/31576 , F15B2211/329 , F15B2211/50518 , F15B2211/513 , F15B2211/5157 , F15B2211/5159 , F15B2211/528 , F15B2211/6054 , F15B2211/615 , F15B2211/6355 , F15B2211/65 , F15B2211/7053 , F15B2211/71
Abstract: Die Erfindung geht aus von einer hydraulischen Steueranordnung, die eine bedarfsstromgeregelte (load-sensing-geregelten) Verstellpumpe (18), als hydraulischen Verbraucher (22,23) einen einen ringförmigen ersten Druckraum (24) und einen kreiszylindrischen zweiten Druckraum (25) besitzenden Differentialzylinder (22,23), ein proportional verstellbares Wegeventil (12,13), ein Vorspannventil (60) zur Erzeugung eines Vorspanndrucks in einem stromauf des Vorspannventils gelegenen Abschnitt (42) der Ablaufleitung (43) und ein zwischen diesem Abschnitt der Ablaufleitung und der zweiten Verbraucherleitung (21) angeordneten und zu dieser hin öffnenden Rückschlagventil (45) aufweist. Bei einer solchen hydraulischen Steueranordnung dienen das vorhandene Vorspannventil (60) und das Rückschlagventil (45) dem Zweck, Kavitation im zweiten Druckraum (25) des Differentialzylinders (22,23) zu vermeiden. Diese Gefahr soll weiter verringert werden. Dies wird dadurch erreicht, daß Ventilmittel (70) vorgesehen sind, über die Druckmittel aus der Zulaufleitung (41) in den besagten Abschnitt (42) der Ablaufleitung (43) einspeisbar ist, wenn in diesem Abschnitt (42) der Druck auf einen unterhalb des Vorspanndrucks liegenden Wert abfällt. Somit kann den kavitationsgefährdeten Räumen, Kanälen und Leitungen zusätzliches Druckmittel aus dem vorgespannten Abschnitt (42) der Ablaufleitung (43) zugeführt werden und die Kavitationsgefahr ist weiter vermindert.
Abstract translation: 用于供应压力介质优选多个液压耗能器（22，23）的液压控制装置包括阀装置（70），通过该压力介质从入口管线（41）进料至出口管线的一部分（42）（43） 当在本节中，如果低于初始应力压力的压力。 优选的特点：该阀装置在除伺服阀（60）包括双向供给阀。 进料阀是一个双向减压阀设定在压力全部是以下，优选为约2巴下，比初始应力的压力。
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公开(公告)号：EP0801231B1
公开(公告)日：2000-09-27
申请号：EP97302388.0
申请日：1997-04-08
Applicant: Commercial Intertech Corp.
Inventor： Coolidge, Gregory T.
CPC classification number: E02F9/2296 , E02F9/2225 , F15B11/168 , F15B2211/20553 , F15B2211/30555 , F15B2211/329 , F15B2211/351 , F15B2211/353 , F15B2211/40515 , F15B2211/455 , F15B2211/6052 , F15B2211/6054 , F15B2211/6058 , F15B2211/65 , F15B2211/71 , F15B2211/78
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Patent Agency Ranking
公开(公告)号：EP0828943A1
公开(公告)日：1998-03-18
申请号：EP96911547.0
申请日：1996-04-02
Applicant: Husco International, Inc.
Inventor： WILKE, Raud, A. , HAMKINS, Eric, P. , LAYNE, Michael, C. , PEDERSEN, Leif , RUSSELL, Lynn, A.
IPC: F15B11
CPC classification number: F15B11/168 , F15B11/165 , F15B2211/20553 , F15B2211/251 , F15B2211/30555 , F15B2211/3111 , F15B2211/3144 , F15B2211/31576 , F15B2211/324 , F15B2211/6054 , F15B2211/6055 , F15B2211/6058 , F15B2211/65 , F15B2211/71
Abstract: An improved pressure-compensated hydraulic system for feeding hydraulic fluid to one or more hydraulic actuators. A remotely located, variable displacement pump provides an output pressure equal to input pressure plus a constant margin. A pressure compensation system requires that a load-dependent pressure be provided to the pump input through a load sense circuit. A reciprocally spooled, multi-ported isolator transmits the load-dependent pressure to the pump input but prevents fluid in the load sense circuit from leaving the load sense circuit and flowing through a relatively long conduit leading to the remotely located pump. In a multi-valve array, at least one valve section has a backflow-preventing shuttle valve which prevents backflow through the pressure compensation system if a main relief valve is operative.
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7.发明公开
公开(公告)号：EP0279356A1
公开(公告)日：1988-08-24
申请号：EP88102009.3
申请日：1988-02-11
Applicant: DEERE & COMPANY
Inventor： Johnson, Steven Harold , Williams, Lary Lynn
CPC classification number: F15B11/17 , E02F9/2232 , E02F9/2239 , E02F9/2292 , E02F9/2296 , F15B2211/20553 , F15B2211/20576 , F15B2211/30505 , F15B2211/3111 , F15B2211/351 , F15B2211/353 , F15B2211/6313 , F15B2211/65 , F15B2211/6651 , F15B2211/7142 , F15B2211/715 , F15B2211/78
Abstract: An excavator has a number of different hydraulically powered functions (28, 32, 36) that are controlled by a closed center hydraulic system which features a pair of variable displacement, engine driven hydraulic pumps (44, 46), the displacement of which is responsive to the demands of the system. The flow to various hydraulic motors (30, 34, 38) for the functions (28, 32, 36) is controlled by pilot operated load sensing control valves (85, 86, 87, 88, 89, 90) which direct fluid pressure to a load sensing line (74) when one of the hydraulic motors in the system is being operated. This load sensing line (74) is connected to controls (48, 50) of the pumps (44, 46) to place the pumps in stroke when a flow of pressurized fluid is required. The flow of the load sensing pressure to the control (48) for one of the pumps (44) can be optionally disconnected by an on/off valve (78) to place this pump (44) in a standby condition and thereby reduce the flow capacity of the hydraulic system at the option of the operator.
Abstract translation: 挖掘机具有许多不同的液压动力功能（28,32,36），其由闭合的中央液压系统控制，所述闭合的中央液压系统具有一对可变排量的发动机驱动的液压泵（44,46），其位移响应 对系统的要求。 用于功能（28,32,36）的各种液压马达（30,34,38）的流量由先导操作的负载感测控制阀（85,86,87,88,89,90）控制，其将流体压力 负载感测线（74），当系统中的一个液压马达被操作时。 当需要加压流体流时，该负载感测线路（74）连接到泵（44,46）的控制器（48,50），以将泵置于行程中。 用于一个泵（44）的控制器（48）的负载感测压力的流动可以可选地通过开/关阀（78）来断开，以使该泵（44）处于待机状态，从而减少流量 液压系统的运行能力可选。
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公开(公告)号：EP2672022A3
公开(公告)日：2017-06-07
申请号：EP13169925.8
申请日：2013-05-30
Applicant: CNH Industrial Italia S.p.A.
Inventor： Hennemann, Matthew J. , Lech, Richard J.
CPC classification number: E02F3/964 , E02F9/2232 , E02F9/2282 , E02F9/2296 , F04B49/002 , F04B49/08 , F04B49/12 , F15B13/0416 , F15B2211/605 , F15B2211/6051 , F15B2211/6057 , F15B2211/65
Abstract: A fluid control system (50) including a variable displacement pump (52) having a load system control (54) and configured to operate in an open center mode. A pump control (56) is operable between a first arrangement (58) and a second arrangement (60). The pump control (56) receives pressurized fluid from a first load sensor pressure in fluid communication with the pump (52) and an actuator return pressure in fluid communication with an actuator (22, 26) configured to operate using pressurized fluid from the system (50), the pump control (56) providing a selective pump control pressure to the pump load system control (54). When the system (50) is operating in a standby mode, the pump (52) operates in a first minimized displacement condition. When the system (50) is in a stall mode, the pump (52) operates in a second minimized displacement condition.
Abstract translation: 一种流体控制系统（50），其包括具有负载系统控制器（54）并且被配置为以开中心模式操作的可变排量泵（52）。 泵控制器（56）可在第一装置（58）和第二装置（60）之间操作。 泵控制器（56）从与泵（52）流体连通的第一负载传感器压力和与致动器（22,26）流体连通的致动器回流压力接收加压流体，该致动器构造成使用来自系统的加压流体 50），泵控制器（56）向泵负载系统控制器（54）提供选择性泵控制压力。 当系统（50）以待机模式运行时，泵（52）以第一最小排量状态运行。 当系统（50）处于失速模式时，泵（52）以第二最小排量状态运行。
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公开(公告)号：EP1760325A2
公开(公告)日：2007-03-07
申请号：EP06009728.4
申请日：2006-05-11
Applicant: AGCO GmbH
Inventor： Brockmann, Andreas , Martens, Michael
IPC: F15B11/16
CPC classification number: F15B11/165 , F15B11/162 , F15B11/168 , F15B2211/253 , F15B2211/30535 , F15B2211/6054 , F15B2211/65 , F15B2211/7053 , F15B2211/7058
Abstract: 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), sucking from a pressure medium tank (3), the pump being controlled as a function of the load pressure of the pressure medium consumers and supplying a pump pressure exceeding the load pressure by a predetermined control pressure differential. In order to produce a first control pressure differential for operating a primary pressure medium consumer (6) its load pressure acts upon a pressure and flow controller (13) of the pump and in order to produce a second higher control pressure differential for operating an auxiliary pressure medium consumer (11, 12) a pressure exceeding their load pressure is produced by means of an amplifying circuit (29).
In order to obtain rapid response of an actuated primary pressure medium consumer and in order to prevent, under certain conditions due to thermal expansion, pressure medium from flowing to the pressure and flow controller of the pump and possibly causing unwanted restriction of the pump, it is proposed that the load pressure of a primary pressure medium consumer (6) and the pressure supplied by the amplifying circuit (29) can be fed via a shuttle valve (19) to the pressure and flow controller (13) of the pump (1) and that the load pressure reporting line (28) conducting the load pressure of an auxiliary pressure medium consumer (11, 12) is connected via a flow control valve (30) to the pressure medium tank (3).Abstract translation: 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），从压力介质罐（3） ），作为压力介质使用者的负载压力的函数来控制泵，并且通过预定的控制压力差提供超过负载压力的泵压力。 为了产生用于操作主要压力介质消耗器（6）的第一控制压差，其负载压力作用在泵的压力和流量控制器（13）上，并且为了产生用于操作辅助件的第二较高控制压力差 压力介质消耗器（11,12）通过放大电路（29）产生超过其负载压力的压力。 为了获得致动的初级压力介质消耗者的快速响应，并且为了在由于热膨胀的某些条件下阻止压力介质流入泵的压力和流量控制器并且可能导致泵的不希望的限制， 提出了一次压力介质消耗器（6）的负载压力和由放大电路（29）供应的压力可以经由梭阀（19）馈送到泵（1）的压力和流量控制器（13） ），并且进行辅助压力媒体消耗器（11,12）的负载压力的负载压力报告线（28）经由流量控制阀（30）连接到压力介质箱（3）。
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公开(公告)号：EP0650558B1
公开(公告)日：1997-01-29
申请号：EP93915747.5
申请日：1993-06-30
Applicant: MANNESMANN REXROTH GmbH
Inventor： STELLWAGEN, Armin
IPC: F15B11/05
CPC classification number: F15B13/0417 , F15B11/163 , F15B11/168 , F15B2211/20553 , F15B2211/30515 , F15B2211/30535 , F15B2211/3057 , F15B2211/329 , F15B2211/351 , F15B2211/50518 , F15B2211/5159 , F15B2211/55 , F15B2211/65 , F15B2211/71
Abstract: The invention concerns a control unit for at least one hydraulic consumer, the direction and speed of operation of the consumer being controlled by means of a distributor valve (14). Two lines (21, 22) lead from the distributor valve (14) to the consumer, each consumer line being connected by means of a distributor-valve piston (15) and a calibrated orifice (30) to a pump (85) and hence a reservoir. Each consumer line has a throttle valve (23) with a control piston (34). The aim of the invention is to be able to keep the consumer in a particular position without loss of hydraulic fluid. This is achieved by virtue of the fact that the throttle-valve (23) control piston (34) is located downstream of the distributor-valve piston (15) and the calibrated orifice (30) in the line (21, 22). A valve seat (35) is acted on by the control piston (34). The front of the control piston (34) has a first pressure surface (36) which is acted on, to open the throttle valve (23), by the pressure in the respective consumer line (21, 22) downstream of the distributor valve (14) and the calibrated orifice (30), the rear of the control piston (14) has a second pressure surface (41) which is acted on, to close the throttle valve (23), by a control pressure generated only by the load in the position of rest of the distributor valve (15), and the front of the control piston has a third pressure surface (40) which is acted on, to open the throttle valve (23), by the load pressure in the respective consumer line (21, 22) between the throttle valve (23) and the consumer. When the pressure is released in the respective consumer line (21, 22) to the reservoir, the pressure acting on the second pressure surface (41) is reduced.
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