An Electrostatic Hydraulic Actuator Driven by Double Butterfly Synergistic Distribution Pumps

Abstract

The invention provides an electro-hydrostatic actuator driven by a double-butterfly-shaped cooperative flow distribution pump. The electro-hydrostatic actuator comprises the double butterfly-shaped cooperative flow distribution pump, wherein a double-butterfly-shaped flow distribution valve block is provided with an oil port X and an oil port Y; the oil port X and the oil port Y are respectively connected with a hydraulic cylinder through a first pipeline and a second pipeline; two pressure protection valves which are connected with each other in parallel is connected between the two pipelines; the directions of pressure relief oil lines of the two pressure protection valves are opposite; and an energy accumulator is connected with the first pipeline through a first one-way valve, is connected with the second pipeline through a second one-way valve, and is connected with a check valve through a third one-way valve. The electro-hydrostatic actuator driven by the double-butterfly-shaped cooperative flow distribution pump has high frequency response, high efficiency and high energy saving effect and can meet requirements on a modern hydraulic system; and by a modular design, the manufacturability on machining and assembling of the electro-hydrostatic actuator is high.

Description

technical field [0001] The invention relates to the technical field of hydraulic transmission, in particular to an electrostatic hydraulic actuator driven by a double-butterfly coordinated distribution pump. Background technique [0002] Hydraulic technology is one of the important technologies in the field of modern engineering machinery technology. The hydraulic pump is the component that completes the conversion of mechanical energy to hydraulic energy in the hydraulic system. The existing hydraulic pumps mainly include plunger pumps, vane pumps, gear pumps and other forms. The above-mentioned traditional hydraulic pumps are mainly used in open hydraulic systems. Its characteristic is that regardless of the demand of the load, the pump and the motor unit have been running at high speed to complete the conversion of electrical energy to hydraulic energy, and maintain the stability of the system pressure through accumulators and relief valves. , to provide sufficient hydrau...

AI Technical Summary

Problems solved by technology

Its defect is that the rotary motion of the plunger on the revolution circle needs to be converted into reciprocating motion through a complex mechanism, which results in many internal transmission links and friction pairs of the plunger pump.

For the application requirements of the pump-controlled hydraulic system, the plunger pump needs to change the direction of rotation of the rotating parts to change the flow direction of the oil, or dynamically adjust the inclination of the swash plate to change the flow direction of the oil. The complexity of the structure causes the moment of inertia of the rotating parts Large, so its ability to dynamically adjust the system flow and pressure is limited, which cannot meet the high dynamic requirements of the pump control system

Images