Axial flow distribution proportional servo valve

Abstract

The invention relates to an axial flow distribution proportional servo valve which comprises an axial flow distribution valve body stator and an axial flow distribution valve element rotor rotatably installed in an inner cavity of the axial flow distribution valve body stator, and the axial flow distribution valve body stator and the axial flow distribution valve element rotor are each sequentially provided with three sealing areas from top to bottom. A working oil port, an oil supply port and an oil return port which correspond to the three sealing areas respectively are sequentially formed in the side wall of the axial flow distribution valve body stator from top to bottom, the working oil port is communicated with an external executing mechanism, and the oil supply port and the oil return port are communicated with an external oil source. An oil supply channel, an oil return channel and a through hole are formed in the axial flow distribution valve element rotor in the axial direction, continuous proportion conduction state control between the oil supply channel and the working oil port and between the oil return channel and the working oil port is achieved by rotating the axial flow distribution valve element rotor, and then continuous different proportion speed control over the external executing mechanism is achieved. Compared with the prior art, the axial flow distribution proportional servo valve has the advantages of high flow capacity, convenience in adjustment, reduction of rotation wear and the like.

Description

technical field [0001] The invention relates to the technical field of fluid control, in particular to an axial distribution proportional servo valve. Background technique [0002] For conventional proportional servo valves, the structure of the proportional reversing valve with double coils mainly adopts lock nut + proportional coil + core tube + spring + gasket + proportional valve core + valve body + gasket + spring + core tube + Structural form of proportional coil + lock nut; single coil proportional directional valve structure mainly adopts lock nut + proportional coil + core tube + spring + gasket + proportional valve spool + valve body + gasket + spring + end cover the structural form; [0003] Its power supply is mainly driven by PWM signal. The movement of the spool in the valve body is mainly supported by the hydraulic oil film. After the oil pollution particles flow into the gap between the spool and the valve body, it will affect the smoothness of the movement ...

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Problems solved by technology

[0003] Its power supply is mainly driven by PWM signal. The movement of the spool in the valve body is mainly supported by the hydraulic oil film. After the oil pollution particles flow into the gap between the spool and the valve body, it will affect the smoothness of the movement of the spool. If the proportional coil is in the energized state for a long time , the spool is easy to get stuck, causing failure of the actuator, and due to the limited installation space, the size of the proportional coil will limit its maximum holding force and affect its output power characteristics. The fluid flows through the cavity formed by the spool / valve body body, the generated hydrodynamic force also limits the flow capacity; in addition, the size of the proportional coil also affects the heat dissipation characteristics. It is easy to burn the coil in a high temperature or high humidity environment, and the plastic packaging process of the coil and the way of electrical connection will also affect the Affect the waterproof level

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