A hydraulic balanced motor valve porting bi-directional axial plunger device

Abstract

The present application belongs to the field of fluid transmission and control technology, and particularly relates to a bidirectional axial plunger device with hydraulic balance type motorized valve flow distribution. High-pressure liquid enters the driving structure through the hydraulic balance type motorized flow distribution valve, and drives the main shaft to rotate and output torque. The main shaft synchronously drives the valve rod to move, and the valve rod drives the upper valve core or the lower valve core to act, thereby realizing the communication switching of the first flow passage / second flow passage and the third flow passage, and effectively improving the suction capacity. The valve flow distribution mode is suitable for high-pressure working conditions, has strong anti-pollution ability and small leakage. The device integrates the functions of the traditional double-flow valve, improves the compactness of the device, significantly improves the volumetric efficiency, and reduces the pressure and flow pulsation. The hydraulic balance design leads the working liquid to the bottom through the valve core flow passage, so that the pressure areas of the bottom and the top are consistent, the upper and lower hydraulic pressures are offset, and the valve core closing is only controlled by the elastic force; the built-in pressure compensation mechanism can actively offset the system pressure fluctuation, has faster response and better dynamic stability, and avoids the high-low pressure cross-flow problem.

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