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Single spool selector valve for simultaneous pump displacement and motor direction control in hydrostatic drive
Single spool selector valve for simultaneous pump displacement and motor direction control in hydrostatic drive
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机译:单阀芯换向阀,用于在静液压驱动中同时进行泵排量和电机方向控制
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摘要
Reversible hydraulic motors drdiven by fluid from variable displacement pumps are useful in driving various mechanisms of earthmoving machines. It is desirable to control both the speed and direction of the motor with a single lever. The subject hydraulic control system includes a selector valve which has a fluid control section for directing pilot fluid to a reversing valve to reverse the direction of the motor. A signal control valve is mechanically actuated by movement of the selector valve to the operating position so that a regulated pressure control signal is directed to a displacement control of variable displacement pump to regulate the volumetric output of the pump and thus the operating speed of the motor.
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