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公开(公告)号：US06868863B2
公开(公告)日：2005-03-22
申请号：US10293198
申请日：2002-11-13
IPC分类号： F15B13/04 , F15B13/042 , G05D16/10 , F16K17/04
CPC分类号： F15B13/042 , F15B13/0402 , G05D16/10 , Y10T137/7793 , Y10T137/7808
摘要： The invention concerns a pressure reduction valve (1) with a housing (2a, 2b), a valve element (6) being displaceable in the housing and acted upon in one direction by a pressure in a low-pressure chamber connected with an outlet (11) and in the opposite direction by the force of a spring (16), which is arranged in a spring chamber (17) in the housing (2a). It is endeavoured to improve the dynamic behaviour of the pressure reduction valve. For this purpose, a pilot flow path (7, 23, 21) connects the low-pressure chamber (5) and the spring chamber (17) with each other.
摘要翻译： 本发明涉及一种具有壳体（2a，2b）的减压阀（1），阀元件（6）可在壳体中移动并且通过与出口连接的低压室中的压力在一个方向上作用 通过布置在壳体（2a）中的弹簧室（17）中的弹簧（16）的力而在相反方向上。 努力提高减压阀的动态性能。 为此，先导流路（7,23,21）将低压室（5）和弹簧室（17）彼此连接。
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公开(公告)号：US06220289B1
公开(公告)日：2001-04-24
申请号：US09550697
申请日：2000-04-17
IPC分类号： F15B13042
CPC分类号： F15B13/015 , F15B13/0402 , F15B13/042 , F15B2013/0413 , Y10T137/87241
摘要： A hydraulic valve arrangement with locking and floating function, with a control valve (9), which, for two operating positions (11, 12) connects one motor connection (A) with a pump connection and a second motor connection (B) with a tank connection and vice versa, in a floating position (13) connects both motor connections (A, B) with the tank connection and in a locking position (10) separates both motor connections (A, B) from the pump and tank connections. Further, there are two closing valves (16, 17), each being connected between the control valve (9) and a motor connection (A, B) and each having a piston loaded by a spring and limiting a spring chamber, the spring chambers being pressure releasable. Characteristic of this valve arrangement is that lifting valves (18, 19) are provided for the pressure release, which valves are operated by a control pressure depending on the position of the control valve (9). This improves the operating reliability.
摘要翻译： 具有锁定和浮动功能的液压阀装置，具有控制阀（9），对于两个操作位置（11,12），将一个电动机连接（A）与泵连接和第二电动机连接（B）连接，其中 油箱连接，反之亦然，在浮动位置（13）将两个电动机连接（A，B）与油箱连接相连接，并且在锁定位置（10）将两个电动机连接（A，B）与泵和油箱连接分开。 此外，还有两个关闭阀（16,17），每个都连接在控制阀（9）和马达连接件（A，B）之间，每个具有由弹簧加载并限制弹簧室的活塞，弹簧室 可压力释放。 该阀装置的特征是提供用于压力释放的提升阀（18,19），该阀根据控制阀（9）的位置通过控制压力操作。 这提高了操作的可靠性。
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公开(公告)号：US5323687A
公开(公告)日：1994-06-28
申请号：US967679
申请日：1992-10-23
摘要： A hydraulic circuit for a backhoe loader having two double-acting cylinders for the arm and bucket of the loader and respective directional valves for the cylinders. There are heavy demands on the oil pump of the system when the two cylinders are moved simultaneously from one extreme position to another which requires substantially two whole cylinder volumes of oil. The cylinders are arranged in parallel relative to the pump. A first source of pressure medium displaced from one cylinder is used to perform work in the other cylinder and the other cylinder is also supplied with a second source of pressure medium directly from a pump. The line section through which the first source of pressure medium is supplied is shunted to a tank by valving apparatus upon a predetermined pressure being reached to freely accommodate the simultaneous movements of the cylinders.
摘要翻译： 一种用于挖掘装载机的液压回路，其具有用于装载机的臂和铲斗的两个双作用缸以及用于缸的相应方向阀。 当两个气缸同时从一个极限位置移动到另一个极限位置时，对系统的油泵有很大的要求，这需要大致两个整个气缸体积的油。 气缸相对于泵平行布置。 使用从一个气缸移位的第一压力介质源在另一个气缸中进行工作，另一个气缸也直接从泵供应第二压力介质源。 在达到预定压力时，供应第一压力介质源的管段部分通过阀装置分流到罐中，以自由地容纳气缸的同时运动。
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公开(公告)号：US5285867A
公开(公告)日：1994-02-15
申请号：US724160
申请日：1991-07-01
摘要： The handwheel of a vehicle is connected to a handwheel shaft which in turn is connected through a load torque isolating device (overrunning clutch) that acts in either of the two directions of rotation and is connected to a steering shaft that controls a hydraulic arrangement. The hydraulic arrangement controls a steering motor that in turn controls the direction of turning of the vehicle. A second motor is drivingly connected to the overrunning clutch to rotate the steering shaft when the second motor is operated but when the steering is controlled by the handwheel, movement of the second motor is prevented. The second motor is operable from a location remote from the vehicle. The overrunning clutch includes a hub connected to the steering shaft and is movable by the handwheel shaft, the hub being wedgable against the clutch housing for being driven by the second motor by two jamming rollers that each acts in one direction of rotation and can be released by rotating the handwheel shaft. In one embodiment, the load torque isolating device may be arranged between a planetary gear and the steering handwheel shaft arrangement. Sensors and a control circuit may be arranged to achieved a direct correlation between the position of the steering handwheel and the steering angle.
摘要翻译： 车辆的手轮连接到手轮轴，该手轮轴又通过负载扭矩隔离装置（超越离合器）连接，该负载扭矩隔离装置作用在两个旋转方向中的任一方向上，并连接到控制液压装置的转向轴。 液压装置控制转向马达，该转向马达又控制车辆的转向。 当第二电动机被操作时，第二电动机驱动地连接到超速离合器以使转向轴旋转，但是当转向由手轮控制时，防止了第二电动机的移动。 第二电动机可从远离车辆的位置操作。 超越离合器包括连接到转向轴的轮毂，并且可通过手轮轴移动，轮毂可抵靠离合器壳体抵靠第二电动机驱动，两个干扰辊分别在一个旋转方向上作用并且可以被释放 通过旋转手轮轴。 在一个实施例中，负载扭矩隔离装置可以布置在行星齿轮和转向手轮轴装置之间。 可以设置传感器和控制电路以实现转向手轮的位置与转向角之间的直接相关。
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35.发明授权Hydraulic control apparatus for a servo-motor, particularly for vehicle steering 失效伺服电机液压控制装置，特别适用于车辆转向
公开(公告)号：US4364302A
公开(公告)日：1982-12-21
申请号：US178146
申请日：1980-08-14
CPC分类号： B62D5/09 , Y10T137/2564
摘要： The invention relates to a steering control unit for a bidirectional servomotor which is connectable to steerable wheels. A steering wheel controlled quantity setting unit of a known type has ports connectable to a pump and a return tank and two control ports through which metered quantities of fluid flow to opposite sides of the servomotor and to other parts of the apparatus for actuating the servomotor. A directional control valve for selectivity directing pressurized fluid from a power circuit to opposite sides of the servomotor is controlled by a control circuit containing the setting unit. A utility valve having the pressure regulating and control and power valve capabilities required for this type of apparatus is characterized by having only a single slide spool for performing all of these functions.
摘要翻译： 本发明涉及一种用于双向伺服电机的转向控制单元，其可连接到可转向的车轮。 已知类型的方向盘控制量设定单元具有可连接到泵和回流罐的端口和两个控制端口，计量量的流体流过伺服电机的相对侧以及用于致动伺服电动机的装置的其它部分。 用于将加压流体从功率电路选择性地引导到伺服电动机的相对侧的方向控制阀由包含设定单元的控制电路控制。 具有这种类型设备所需的压力调节和功率阀能力的公用阀的特征在于仅具有用于执行所有这些功能的单个滑阀。
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公开(公告)号：US4065921A
公开(公告)日：1978-01-03
申请号：US744624
申请日：1976-11-24
CPC分类号： F15B11/17 , B62D5/09 , B62D5/093 , B62D5/32 , F15B2211/20584 , F15B2211/329 , F15B2211/353 , F15B2211/50527 , F15B2211/50563 , F15B2211/5152 , F15B2211/6355 , F15B2211/67 , F15B2211/7142
摘要： The invention relates to a hydraulic control unit for a servomotor of the type used for vehicle steering systems. The unit has a control circuit with a power operated pump and a hand operated metering motor and an operating circuit with a power operated pump. The two circuits intersect upstream from the servomotor. A pressure comparison, throttling and proportioning valve is disposed between the outlets of the two pumps of the control and operating circuits. The proportioning valve is controlled by a differential pressure applied by the pumps and a spring which supplements the operating pump pressure. In the normal operating mode the proportioning valve allows a minor fractional flow of the pressurized fluid generated by the control pump to flow through the valve to the operating circuit. Under varying conditions when either of the pumps become wholly or partially inoperative the proportioning valve provides for an increased flow from the unaffected circuit to the disabled circuit to maintain a degree of operation until such time that the breakdown has been cured.
摘要翻译： 本发明涉及一种用于车辆转向系统的用于伺服电机的液压控制单元。 该单元具有带动力泵和手动计量电动机的控制电路以及具有动力操作泵的操作电路。 两个回路从伺服电机的上游相交。 压力比较，节流和配比阀设置在控制和操作电路的两个泵的出口之间。 比例阀由泵施加的压差和补充操作泵压力的弹簧控制。 在正常操作模式下，比例阀允许由控制泵产生的加压流体的小的分数流通过阀流到操作回路。 在不同的条件下，当任一个泵完全或部分地不起作用时，比例阀提供从未受影响的电路到禁用电路的增加的流量，以保持一定程度的操作，直到击穿已经固化。
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公开(公告)号：US4052929A
公开(公告)日：1977-10-11
申请号：US588623
申请日：1975-06-20
IPC分类号： F15B13/043 , B62D5/08 , B62D5/09 , F15B11/02 , F15B13/042
CPC分类号： F15B11/02 , B62D5/08 , B62D5/09 , F15B2211/20538 , F15B2211/30505 , F15B2211/3051 , F15B2211/30525 , F15B2211/3054 , F15B2211/327 , F15B2211/329 , F15B2211/50518 , F15B2211/5151 , F15B2211/55 , F15B2211/6054 , F15B2211/61 , F15B2211/6355 , F15B2211/7054
摘要： The invention relates to a hydraulic control apparatus of the type used in vehicle steering systems. In all such systems there is a reversible type hydraulic motor connected to the steering linkage. The motor has complementary expansible chambers. With the use of control means pressurized fluid is selectively delivered to one chamber which is caused to expand concomitantly with the collapsing of the other chamber from which fluid is returned to a sump. There is provided in the control and power circuit throttle valves having respective opening positions which correspond to the pressure difference on both sides of the valves. Between the passages which extend to the two control circuit throttle valves is a pressure comparator which is operable to vary the pressure upstream of the power circuit throttle valve in proportion to the pressure upstream of the control circuit throttle valve.
摘要翻译： 本发明涉及一种用于车辆转向系统的液压控制装置。 在所有这样的系统中，存在连接到转向连杆的可逆式液压马达。 电动机具有互补的可膨胀室。 通过使用控制装置，加压流体被选择性地输送到一个室，该腔室被引起与另一个腔室的塌缩同时膨胀，从该腔室将流体返回到贮槽。 在控制和电源电路节流阀中设置有相应于阀门两侧的压力差的开启位置。 在延伸到两个控制回路节流阀的通道之间是一个压力比较器，其可操作以与控制回路节流阀上游的压力成比例地改变功率回路节流阀上游的压力。
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公开(公告)号：US3978879A
公开(公告)日：1976-09-07
申请号：US483115
申请日：1974-06-26
CPC分类号： B62D5/09 , B62D5/093 , F15B9/02 , Y10T137/2579 , Y10T137/2617 , Y10T137/7766 , Y10T137/7771 , Y10T137/87177
摘要： The invention relates to a control valve assembly for a hydrostatic control system such as power steering assembly. A common control valve assembly of this type has relatively rotatable inner and outer elements connected respectively to a vehicle steering wheel and a servomotor. Paired holes in the inner and outer element permit the flow of fluid therethrough when the unit is in its neutral position with the paired holes in respective registration. In hydrostatic steering system of this type impact is sometimes applied to the steering wheel when the working motor connected to the steered wheels is suddenly loaded, e.g. when the wheels strike a stone. Such impacts on the steering wheel are avoided by providing a one-way valve in a section of the working path through which fluid flows to the working motor. Pressure regulating valve means, excess pressure valve means and emergency control valve means are associated with the one-way valve assembly.
摘要翻译： 本发明涉及一种用于诸如动力转向组件的静液压控制系统的控制阀组件。 这种类型的公共控制阀组件具有相对可旋转的内部和外部元件分别连接到车辆方向盘和伺服电动机。 当单元处于其中性位置时，内部和外部元件中的配对孔允许流体流过其中，成对的孔在相应的配准中。 在这种类型的静液压转向系统中，当连接到转向轮的工作电动机突然加载时，有时会对方向盘施加冲击。 当车轮撞上石头时。 通过在工作路径的一部分中提供单向阀来避免对方向盘的这种冲击，通过该部分流体流向工作电动机。 压力调节阀装置，过压阀装置和紧急控制阀装置与单向阀组件相连。
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39.发明申请公开(公告)号：US20090131311A1
公开(公告)日：2009-05-21
申请号：US11813045
申请日：2005-12-20
申请人： Peter Becker , Thorkild Christensen
发明人： Peter Becker , Thorkild Christensen
CPC分类号： C07K1/1136 , C07K14/61
摘要： A method for reducing or substantially preventing formation of a trisulfide derivative of a polypeptide in a liquid medium containing the polypeptide ijn question comprises stripping the liquid medium with a gas, suitably a chemically unreactive gas such as nitrogen or argon.
摘要翻译： 减少或基本上阻止在含有多肽问题的液体介质中形成多肽的三硫化物衍生物的方法包括用合适的化学反应性气体如氮气或氩气气体汽提液体介质。
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公开(公告)号：US06971407B2
公开(公告)日：2005-12-06
申请号：US10734838
申请日：2003-12-12
CPC分类号： E02F9/2267 , E02F9/226 , F15B13/0402 , F15B13/0417 , Y10T137/87169 , Y10T137/87185
摘要： The invention concerns a hydraulic valve arrangement with a supply connection arrangement, which has a high-pressure connection (P) and a low-pressure connection (T), a working connection arrangement, which has two working connections (A, B), which can be connected with a consumer, a directional valve and a compensation valve arranged between the directional valve and the supply connection arrangement, the pressure outlet of the compensation valve being connected with a pressure inlet of the directional valve. It is endeavoured to avoid dangerous situations, which occur because of uncontrolled pressures. For this purpose, it is ensured that the compensation valve has a relief outlet, which can be connected with the pressure outlet.
摘要翻译： 本发明涉及具有供应连接装置的液压阀装置，其具有高压连接（P）和低压连接（T），工作连接装置具有两个工作连接（A，B），其中 可以与消费者连接，方向阀和布置在方向阀和供应连接装置之间的补偿阀，补偿阀的压力出口与方向阀的压力入口连接。 尽可能避免因不受控制的压力而发生的危险情况。 为此，确保补偿阀具有可与压力出口连接的泄压出口。
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