A shaft distribution switch reversing valve

Abstract

The invention relates to an axial distribution switch reversing valve, which comprises an axial distribution valve body stator and an axial distribution valve core rotor rotatably installed in the inner cavity of the axial distribution valve body stator, the axial distribution valve body stator and the axial distribution valve The core rotor is provided with four sealing areas that are not connected to each other from top to bottom, and the working oil port A, working oil port B, The oil port and the oil return port, the working oil port A and the working oil port B are respectively connected with the external actuator, the oil supply port and the oil return port are respectively connected with the external oil source, and the upper edge of the shaft distribution valve core rotor An oil supply channel and an oil return channel are opened in the axial direction, and the on-off state between the oil supply channel and the oil return channel and the working oil port A and the working oil port B are respectively realized by rotating the shaft distribution spool rotor, and then the switching direction is realized. Compared with the prior art, the present invention has the advantages of shaft flow distribution, non-contact wear reduction, three-position function switching, and the like.

Description

technical field [0001] The invention relates to the technical field of fluid control, in particular to an axial flow distribution switch reversing valve. Background technique [0002] The existing switch electromagnetic reversing valve, its double-coil electromagnetic valve structure mainly adopts lock nut + electromagnetic coil + core tube + spring + gasket + valve core + valve body + gasket + spring + core tube + electromagnetic coil + lock nut structure; the single coil solenoid valve structure mainly uses the structure of lock nut + electromagnetic coil + core tube + spring + gasket + valve core + valve body + gasket + spring + end cover. [0003] According to the type of power supply voltage, it can be divided into DC and AC. The power supply voltage value can be selected in a wide range. The movement of the valve core in the valve body is mainly supported by the hydraulic oil film. Oil pollution particles passing through the gap between the valve core and the valve bod...

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Problems solved by technology

[0003] According to the type of power supply voltage, it can be divided into DC and AC. The power supply voltage value can be selected in a wide range. The movement of the valve core in the valve body is mainly supported by the hydraulic oil film. Oil pollution particles passing through the gap between the valve core and the valve body will affect the smooth movement of the valve core. If the electromagnetic coil is in the energized state for a long time, the valve core is easy to get stuck, causing the actuator to fail; and due to the limited installation space, the size of the coil will limit its maximum holding force, which will affect its output power characteristics. The hydraulic force generated by the cavity formed by the spool / valve body also limits the flow capacity of conventional on-off electromagnetic reversing valves; and the size of the coil also affects the heat dissipation characteristics, and it is easy to burn the coil in a high-temperature or high-humidity environment. The plastic sealing process of the coil and the way of electrical connection affect the waterproof level

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