Automatic reverse hydraulic actuating mechanism

Abstract

The invention discloses an automatic reversing hydraulic actuator, which includes a piston, a reversing valve and a reciprocating valve. The reversing valve includes a reversing valve core, and the reversing valve core can be moved in two states left and right. In the reversing valve seat, the reversing valve core is connected to the piston rod, and the piston is installed on the piston rod. The reciprocating valve includes a reciprocating valve core with a central flow channel in the middle, and the reciprocating valve core can The left and right states are moved in the reciprocating valve seat, and the first high-pressure fluid passage and the second high-pressure fluid passage respectively communicated with the chambers on both sides of the piston are arranged between the reversing valve seat and the reciprocating valve seat. , a first low-pressure fluid channel and a second low-pressure fluid channel, the first low-pressure fluid channel and the second low-pressure fluid channel communicate with the pump. The automatic reversing hydraulic actuator can not only use the power of the fluid itself to realize the automatic reversing of the fluid, but also has low failure rate, low use cost, and simplifies the actuator.

Description

technical field [0001] The invention relates to an actuator, in particular to a hydraulic actuator which uses the power of the fluid itself to realize the automatic reversing of the fluid. Background technique [0002] At present, hydraulic actuators need to install solenoid valves or manual valves at the power end to achieve fluid reversing. This method has the following disadvantages in the actual application process: 1) The fluid reversing speed is slow, resulting in the reciprocating speed of the actuator. Slower, low work efficiency; 2) Higher failure rate; 3) A large amount of fluid needs to be returned to the pump, which requires high heat dissipation for the pump. Contents of the invention [0003] The object of the present invention is to provide an automatic reversing hydraulic actuator to solve the above-mentioned problems existing in the prior art fluid actuator. [0004] For reaching this purpose, the present invention adopts following technical scheme: [0...

AI Technical Summary

Problems solved by technology

[0002] At present, hydraulic actuators need to install solenoid valves or manual valves at the power end to achieve fluid reversing. This method has the following disadvantages in the actual application process: 1) The fluid reversing speed is slow, resulting in the reciprocating speed of the actuator. Slow, low work efficiency; 2) High failure rate; 3) A large amount of fluid needs to be returned to the pump, which requires high heat dissipation for the pump

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