发明授权
- 专利标题: Hydraulic circuit having pressure equalization during regeneration
- 专利标题(中): 在再生期间具有压力均衡的液压回路
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申请号: US09464497申请日: 1999-12-15
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公开(公告)号: US06955115B1公开(公告)日: 2005-10-18
- 发明人: Michael A. A'Hearn , Thomas J. Hajek, Sr. , Larry W. Lorimor , Daniel T. Mather , Srikrishnan T. Tolappa
- 申请人: Michael A. A'Hearn , Thomas J. Hajek, Sr. , Larry W. Lorimor , Daniel T. Mather , Srikrishnan T. Tolappa
- 申请人地址: US IL Peoria
- 专利权人: Caterpillar Inc.
- 当前专利权人: Caterpillar Inc.
- 当前专利权人地址: US IL Peoria
- 主分类号: F15B11/08
- IPC分类号: F15B11/08 ; E02F9/22 ; F15B11/024 ; F15B11/16
摘要:
A fluid system is provided wherein two different fluid circuits are connected in parallel with a single source of pressurized fluid and the two fluid circuits can function together even when one of the loads is lighter than the other. This is accomplished by having the lightly loaded circuit having a directional control that when operated in one of its operative positions the flow from the rod end of the cylinder is directed through the directional control valve and combined with the supply flow being directed to the head end of the cylinder. With the other heavier loaded circuit also being actuated, the pressure of the fluid from the rod end of the fluid cylinder is equalized with the pressure of the heavier loaded circuit. Consequently, the speed of the heavier loaded circuit does not stall or slow down relative to the lightly loaded circuit. In the case of a machine having a bucket used for backdragging, the circuit needs a diverter system that provides protection from the cylinder rod of the fluid cylinder 26 from buckling during backdragging while maintaining the ability for pressure equalization when not performing a backdragging operation.
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