发明授权
- 专利标题: Rotary servovalve for power-assisted steering system
- 专利标题(中): 用于动力辅助转向系统的旋转伺服阀
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申请号: US173613申请日: 1988-03-25
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公开(公告)号: US4799514A公开(公告)日: 1989-01-24
- 发明人: Tsuneo Tanaka , Katsuhisa Mori
- 申请人: Tsuneo Tanaka , Katsuhisa Mori
- 申请人地址: JPX Kariya
- 专利权人: Toyoda Koki Kabushiki Kaisha
- 当前专利权人: Toyoda Koki Kabushiki Kaisha
- 当前专利权人地址: JPX Kariya
- 优先权: JPX62-72850 19870326
- 主分类号: B62D5/083
- IPC分类号: B62D5/083 ; F15B9/10 ; F16K11/00
摘要:
A rotary servovalve includes a valve sleeve formed with a supply port for connection to a source of fluid under pressure and distribution ports respectively for connection to opposite fluid chambers of a hydraulic power cylinder, the valve sleeve being formed at the inner periphery thereof with circumferentially spaced sleeve channels respectively in open communication with the supply and distribution ports, and a valve rotor coupled with the valve sleeve for relative rotation thereto, the valve rotor being formed thereon with circumferentially spaced control lands which are arranged to correspond with the sleeve channels when the servovalve is in a neutral position. The control lands corresponding with the sleeve channels in open communication with the distribution ports are each formed larger in width than the corresponding sleeve channel and smaller in height than the control land corresponding with the sleeve channel in open communication with the supply port to define a predetermined clearance for restricting the flow of fluid discharged from and supplied into the distribution ports when the servovalve is in the neutral position.
公开/授权文献
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