公开(公告)号：US4532854A

公开(公告)日：1985-08-06

申请号：US563659

申请日：1983-12-20

申请人： Kenneth W. S. Foster

发明人： Kenneth W. S. Foster

IPC分类号： F03C1/24 ,  F03C1/247 ,  F03C1/30 ,  F03C1/34 ,  F03C1/40 ,  F04B1/10 ,  F04B1/107 ,  F04B1/113 ,  F01B13/06

CPC分类号： F03C1/045

摘要： A hydraulic piston and cylinder machine includes a plurality of pistons and cylinders, a ring of ports for alternatively supplying fluid into, and for allowing the fluid to be discharged from each cylinder, and a cam having a plurality of lobes to control the displacement of the pistons in a cylinder block with respect to the progression of the cylinder block along the direction of the cam or vice versa. Each of the pistons traverses each of the cam lobes during a full rotation of the machine to undergo a number of piston strokes equal to the number of lobes. A control valve is adjustable to route working fluid discharged through at least one of the fluid discharge ports of the machine to the exhaust fluid outlet of the machine during each full rotation of the machine via an isolated pressure zone of the machine. In this zone the pressure of fluid is maintained at a level intermediate the supply and exhaust pressures of working fluid to and from the machine, so as to reduce the capacity of the machine to receive and discharge working fluid. The isolated pressure zone is of constant volume and always includes, at any given time, the cylinders associated with at least two pistons of the machine.

摘要翻译： 液压活塞和气缸机械包括多个活塞和气缸，一个端口环，用于将流体交替地供应到每个气缸中并且用于允许流体从每个气缸排出;以及具有多个凸角的凸轮，以控制流体的位移 气缸体中的活塞相对于气缸体沿着凸轮的方向的进行而相反。 在机器完全旋转期间，每个活塞穿过每个凸轮凸角以进行等于凸起数量的多个活塞冲程。 控制阀可调节，以便通过机器的隔离压力区在机器的每次完全旋转期间使通过机器的至少一个流体排放端口排放的工作流体排出到机器的排出流体出口。 在该区域中，流体的压力保持在与机器之间的工作流体的供给和排出压力之间的水平，以降低机器接收和排出工作流体的能力。 隔离的压力区域具有恒定的体积，并且在任何给定时间总是包括与机器的至少两个活塞相关联的气缸。