Electro-hydrostatic actuator provided with replaceable multi-stroke hydraulic cylinder

Abstract

The invention relates to an electro-hydrostatic actuator provided with a replaceable multi-stroke hydraulic cylinder. The electro-hydrostatic actuator comprises an integrated valve block, a motor and a two-way gear pump are installed on the two sides of the integrated valve block respectively, the two-way gear pump is driven by the motor, the two-way gear pump is sleeved with an oil tank, the two sides of the two-way gear pump are provided with a two-way gear pump first end and a two-way gear pump second end respectively, and a two-position three-way electromagnetic reversing valve is inserted into the integrated valve block. A round hole used for containing a coupler is formed in the middle of the integrated valve block, a semicircular groove used for containing the hydraulic cylinder is formed in the bottom of the integrated valve block, a pressing plate is of a semicircular plate-shaped structure, right-angle bent edges are arranged at the two ends of the semicircular pressing plate, the hydraulic cylinder is fixed through the semicircular pressing plate and the semicircular groove in the integrated valve block, mounting and dismounting are convenient, hydraulic cylinders with different strokes can be replaced, and the stroke requirements of different working conditions on the hydraulic cylinders are met.

Description

technical field [0001] The invention belongs to the technical field of electric hydrostatic actuator structure, and relates to an electric hydrostatic actuator capable of replacing multi-stroke hydraulic cylinders. Background technique [0002] Due to the disadvantages of traditional hydraulic actuation systems, such as complex pipeline layout, large volume and mass, poor reliability, and short service life, power-by-wire technology was born. Electric hydrostatic actuator (EHA) is the most representative power transmission system, which originated from a new type of high-performance servo actuator in the aviation field. Unlike traditional hydraulic systems, EHA regulates the speed of the motor through electrical signals , to directly drive the pump, so as to control the pressure and flow output by the pump, and realize the actuation process of accurately controlling the displacement of the actuating parts. As an airborne actuation system, EHA has the advantages of high actu...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an electric hydrostatic actuator that can replace a multi-stroke hydraulic cylinder, which can solve the problem that the piston rod of the existing electric hydrostatic actuator is slow, which affects the working efficiency of the system, and the stroke of the hydraulic cylinder Fixed, it is difficult to meet the stroke requirements of hydraulic cylinders under different working conditions

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