Single-action reciprocating hydraulic actuator

Abstract

The invention discloses a single-action reciprocating hydraulic actuator. The single-action reciprocating hydraulic actuator comprises a hydraulic cylinder, an energy accumulator, a manual pump and ahydraulic power pack, wherein the hydraulic power pack is composed of a fuel tank, a motor, a gear pump, a proportional overflow valve and two one-way valves which are arranged on a hydraulic manifoldblock; the hydraulic manifold block is fixed to the upper part of the hydraulic cylinder; an oil way outlet of the hydraulic manifold block is connected to a rod cavity of the hydraulic cylinder through a pipeline; the energy accumulator is arranged at the lower part of the hydraulic cylinder in a sleeving mode and communicates with a rodless cavity of the hydraulic cylinder; the rod cavity and the rodless cavity of the hydraulic cylinder communicate with an exhaust valve; and a pressure sensor and a displacement sensor are arranged in a system. The single-action reciprocating hydraulic actuator has the advantages that when an emergency occurs and the gear pump cannot work normally, the operation can be performed through the manual pump, and therefore safe operation of the actuator can berealized; and the hydraulic system is simple, the size of the hydraulic manifold block is small, the integration degree is high, the bubble amount of the hydraulic system is small, the safety and thereliability can be achieved, and the problems that when an existing actuator achieves the functions of single-direction output and reciprocating return stroke, the structure of the hydraulic system is complex, the pipeline is complex, the bubble amount is large, and the heating value is high can be solved.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to a hydraulic actuator with unidirectional output and reciprocating action. Background technique [0002] Existing hydraulic actuators need to provide pressure when the hydraulic cylinder returns, and the extension of the hydraulic cylinder depends on mechanical external force, which is generally realized through a complex hydraulic circuit of the actuator. For example, the Chinese invention patent with the publication number of 103307059A discloses a hydraulic actuator, including a hydraulic cylinder and an actuator hydraulic station, and an electric control part and a manual control part are arranged in the actuator hydraulic station. The actuator is equipped with 8 control hydraulic valves. Oil flows on both sides of the hydraulic cylinder and the oil tank. The structure of the hydraulic system is complicated, and the pipeline layout is complicated. After the system works for...

AI Technical Summary

Problems solved by technology

The actuator is equipped with 8 control hydraulic valves. Oil flows on both sides of the hydraulic cylinder and the oil tank. The structure of the hydraulic system is complicated, and the pipeline layout is complicated. After the system works for a period of time, many air bubbles are generated and the air bubbles dissolve. After the hydraulic oil, it will cause noise, crawling and system temperature rise after running for a certain period of time, and cause serious oil pollution in the system

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