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公开(公告)号：US3844198A
公开(公告)日：1974-10-29
申请号：US31327172
申请日：1972-12-08
申请人： RENOLD LTD
摘要： An hydraulic motor comprises two, three or more rows of pistons and cylinders which rows are selectively drivable by fluid under pressure supplied to the motor to provide for different motor speeds for a given delivery of working fluid to the motor. Nonoperative rows of pistons may be retracted to reduce friction losses between the piston''s followers and the cam track on which the followers react to rotate the motor rotor. A driving system employing the motor and a variable delivery fluid pump is also provided, the system thus having a plurality of speed ranges including high speed at low torque and low speed at high torque.
摘要翻译： 液压马达包括两排，三行或更多排的活塞和气缸，这些排可由供应给电动机的压力下的流体选择性地驱动，从而为工作流体给予电动机提供不同的电动机速度。 活塞的非活动排可以缩回以减少活塞的从动件与其上的从动件反作用以使电动机转子旋转的凸轮轨道之间的摩擦损失。 还提供了采用马达和可变输送流体泵的驱动系统，因此该系统具有多个速度范围，包括低扭矩的高速度和高扭矩的低速。
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公开(公告)号：US3852004A
公开(公告)日：1974-12-03
申请号：US33480273
申请日：1973-02-22
申请人： RENOLD LTD
CPC分类号： F04C15/0019
摘要： To eliminate the need of a case drain, a reversible, high pressure gear pump comprises an insert transversely displaceable to and fro in a bore of a housing by fluid under pressure derived from the pump cavity, to seal against the tips of the gear teeth on the high pressure side and thereby place the (for the time being) low pressure, inlet port to the pump cavity in communication with a zone of the pump cavity which extends around a major portion of the periphery of the gears. A side wall member of the pump cavity is pressure balanced into sealing engagement with its adjacent side faces of the gears and the adjacent side face of the insert. This member is plastic faced with a material having the ability to creep into the wear space formed by the gears rubbing against it. In one embodiment, the side wall member urges the opposite side faces of the gears and of the insert, into sealing engagement with a ported side wall of the pump cavity formed as part of the casing. Alternatively, a further one of the side wall members may be pressure balanced into sealing engagement with said opposite side faces.
摘要翻译： 为了消除对箱体排放的需要，可逆的高压齿轮泵包括在来自泵腔的压力下由液体在壳体的孔内来回横向移动的密封件，以密封齿轮齿的末端 高压侧，从而将（至少）的低压入口连接到泵腔，该泵腔与泵腔的围绕齿轮周边的主要部分延伸的区域连通。 泵腔的侧壁构件被压力平衡以与齿轮的相邻侧面和插入件的相邻侧面密封接合。 该构件是塑料的，具有能够蠕动进入由齿轮摩擦的磨损空间的材料。 在一个实施例中，侧壁构件推动齿轮和插入件的相对侧面与形成为壳体的一部分的泵腔的端口侧壁密封接合。 或者，另一个侧壁构件可以被压力平衡以与所述相对侧面进行密封接合。
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