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    • 8. 发明公开
    • EP0565645A4 -
    • EP0565645A4 - Google专利
    • EP0565645A4
    • 1994-04-13
    • EP92909590
    • 1991-01-22
    • CATERPILLAR INC.
    • BUDZICH, TADEUSZ
    • E02F9/22F15B11/08F15B11/16F15B21/04F15B13/06
    • F15B11/08E02F9/226F15B11/165F15B21/047F15B2211/20546F15B2211/20584F15B2211/30505F15B2211/30525F15B2211/3111F15B2211/3144F15B2211/31576F15B2211/327F15B2211/329F15B2211/351F15B2211/50536F15B2211/5158F15B2211/5159F15B2211/526F15B2211/55F15B2211/6052F15B2211/6346F15B2211/635F15B2211/7053F15B2211/71Y10T137/87193Y10T137/87233Y10T137/87241
    • Fluid systems having fluid motors which control aiding type loads many times have problems with cavitation in one end of the fluid type motor during lowering thereof. It is desirable to eliminate all cavitation in the fluid motor during operation. In order to eliminate cavitation during lowering of an aiding type load and to provide a positive pressure therein, the subject arrangement provides an exhaust pressurizing control (184) for use in a fluid system (10). The exhaust pressurizing control (184) includes an exhaust manifold means (80) having selector means (88) to provide a positive pressure in the exhaust manifold means (80) during lowering of an aiding type load (W1). The selector means (88) includes pressure limiting and unloading means (90) operative to provide a positive pressure in the exhaust manifold means (80) during lowering of the aiding type load (W1) and to unload the pressurized fluid in the exhaust manifold means (80) during raising of a resisting type load (W1). The pressurized fluid in the exhaust manifold means (80) is available to the fluid motor (16) through anti-cavitational valve means (109). This arrangement effectively eliminates cavitation in the fluid motor (16).
    • 具有多次控制助力型负载的流体马达的流体系统在降低流体型马达的一端期间存在空化问题。 希望在操作期间消除流体马达中的所有空化现象。 为了消除辅助型负载降低期间的气蚀并在其中提供正压,本主题提供了一种用于流体系统(10)的排气增压控制(184)。 排气加压控制器(184)包括具有选择器装置(88)的排气歧管装置(80),以在降低辅助型负载(W1)期间在排气歧管装置(80)中提供正压。 选择装置(88)包括压力限制和卸载装置(90),其操作用于在降低辅助型负载(W1)期间在排气歧管装置(80)中提供正压,并且将排气歧管装置 (80)在提升阻力型负载(W1)的过程中。 排气歧管装置(80)中的加压流体可通过抗空气阀装置(109)供流体马达(16)使用。 这种布置有效地消除了流体马达(16)中的气穴现象。