公开(公告)号：US5884480A

公开(公告)日：1999-03-23

申请号：US822454

申请日：1997-03-21

申请人： Thomas Dahl ,  Sten Frodin

发明人： Thomas Dahl ,  Sten Frodin

IPC分类号： F04B49/08 ,  F16D31/02

CPC分类号： F04B49/08

摘要： In the field of fluid power control, there is a need for a control scheme that supplies working fluid under pressure to a load in the event of failure of power supplies to control apparatus associated with the circuit. The disclosure relates to a control circuit 10 in which output pressure from a pump 11 is fed to a control piston 13 therefor via a pressure compensator 17. The pressure compensator 17 is biased to disconnect the supply of fluid at outlet pressure when this pressure is below a threshold value, and permit such supply when the outlet pressure exceeds the threshold value determined by the biassing force on the pressure compensator. A proportional control valve 16 may be employed further to counteract the biassing of the pressure compensator 17, whereby to control the threshold pressure at which the compensator 17 operates to feed fluid at control pressure to the piston 13. The invention is of particular use in control circuits eg. for cooling pumps and cooling fans.

摘要翻译： 在流体动力控制领域中，需要一种控制方案，其在与电路相关联的控制装置的电力供应故障的情况下，向负载供给压力下的工作流体。 本公开涉及一种控制电路10，其中来自泵11的输出压力经由压力补偿器17供给到控制活塞13.压力补偿器17被偏压以在该压力低于压力时在出口压力下断开流体供应 阈值，并且当出口压力超过由压力补偿器上的偏压力确定的阈值时允许这样的供应。 可以进一步采用比例控制阀16来抵消压力补偿器17的偏压，从而控制补偿器17操作以将控制压力下的流体供给到活塞13的阈值压力。本发明在控制中特别有用 电路例如 用于冷却泵和冷却风扇。

公开(公告)号：US5918760A

公开(公告)日：1999-07-06

申请号：US931308

申请日：1997-09-16

申请人： Sten Frodin ,  Thomas Dahl

发明人： Sten Frodin ,  Thomas Dahl

IPC分类号： B62D5/06 ,  F15B1/26 ,  E03B11/00

CPC分类号： F15B1/26 ,  B62D5/062 ,  Y10T137/86212

摘要： The invention relates to a hydraulic fluid reservoir comprising a substantially cylindrical wall (1), an upper wall (2) and a lower wall, and two tubular connection pieces (4, 5) for entering and discharging hydraulic fluid into and out from the interior of the reservoir. The two tubular connection pieces, an inlet connection piece (4) and an outlet connection piece (5) are substantially tangentially connected to the cylindrical wall (1) to preserve the momentum of a fluid fed into the reservoir.

摘要翻译： 本发明涉及一种液压流体储存器，其包括基本上圆柱形的壁（1），上壁（2）和下壁，以及两个用于将液压流体进入和流出内部的管状连接件（4,5） 的水库。 两个管状连接件，入口连接件（4）和出口连接件（5）基本上切向连接到圆柱形壁（1）上，以保持供给到储液器中的流体的动量。