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    • 1. 发明申请
    • HYDRAULIC DRIVE SYSTEM AND METHOD OF OPERATING A HYDRAULIC DRIVE SYSTEM
    • 液压驱动系统及液压驱动系统的运行方法
    • WO2006021076A8
    • 2006-05-04
    • PCT/CA2005001218
    • 2005-08-05
    • WESTPORT RES INCNOBLE STEPHENBROOK THOMASHARPER GREGORY C
    • NOBLE STEPHENBROOK THOMASHARPER GREGORY C
    • F15B11/15F15B15/20F15B15/28F15B15/24F15B15/04F15B21/08
    • F15B15/204F15B11/15F15B15/2838
    • A hydraulic drive system (100) comprises a hydraulic actuator (110) comprising a piston (118) reciprocable between two cylinder heads (114, 116) for actuating a machine. A flow switching device (130) reverses the direction of hydraulic fluid flow to and from chambers (120, 122) on opposite sides of the piston (118). The piston (118) stops at the end of each piston stroke when a shuttle valve (124) associated with the piston (118) opens to allow hydraulic fluid to flow between the chambers (120, 122) cancelling the differential pressure that acts on the piston (118) to cause reciprocal movement. A controller (170) is programmed to determine when the piston (118) reaches the end of each stroke based upon at least one of hydraulic pump (140) speed, hydraulic fluid pressure, or elapsed time, with each of these measured during each stroke. The controller (170) then sends an electronic signal to command the flow switching device (130) to reverse the direction of hydraulic fluid flow.
    • 液压驱动系统(100)包括液压致动器(110),液压致动器(110)包括可在两个用于致动机器的气缸盖(114,116)之间往复运动的活塞(118)。 流动切换装置(130)使得在活塞(118)的相对侧上的腔室(120,122)之间的液压流体的流动方向反转。 当与活塞(118)相关联的往复阀(124)打开时,活塞(118)在每个活塞冲程的结束时停止,以允许液压流体在腔室(120,122)之间流动,从而消除作用在活塞 活塞(118)引起往复运动。 控制器(170)被编程为基于液压泵(140)速度,液压流体压力或经过时间中的至少一个来确定活塞(118)何时到达每个冲程的结束,其中每个行程中的每一个在每次冲程期间测量 。 然后,控制器(170)发送电子信号以命令流量切换装置(130)反转液压流体流动的方向。