Steering system used for electric loader and based on hydraulic energy accumulator and variable displacement motor

Abstract

The invention discloses a steering system used for an electric loader and based on a hydraulic energy accumulator and a variable displacement motor. The steering system comprises an oil tank, a first one-way valve, a power source, a motor controller, a motor, a variable displacement pump, the variable displacement motor, an electronic steering wheel, a shaft angle encoder, an electronic control unit, a second one-way valve, a first electromagnetic reversing valve, a second electromagnetic reversing valve, a third electromagnetic reversing valve, a first overflow valve, a fourth electromagnetic reversing valve, a third one-way valve, the hydraulic energy accumulator, a fifth electromagnetic reversing valve, a fourth one-way valve, a second overflow valve, a fifth one-way valve, a sixth reversing valve, a displacement sensor, a left steering oil cylinder, a right steering oil cylinder, a first pressure sensor, a second pressure sensor and the like. The hydraulic energy on an oil return way can be recovered through the variable displacement motor and can be directly used for driving the variable displacement pump, the energy conversion frequency is reduced, the energy recovering efficiency is improved, the electric energy consumption of the motor is reduced, and the working efficiency and the safety performance of the loader are improved.

Description

technical field [0001] The invention relates to a hydraulic control system characterized by electro-hydraulic control technology, in particular to a steering system of an electric loader based on a hydraulic accumulator and a variable motor. Background technique [0002] With the current situation of energy shortage and environmental pollution becoming more and more serious, the problems of high energy consumption and high emission of construction machinery have become increasingly prominent. As a widely used construction machinery, loaders have attracted more and more attention to their emission and power loss. The loader is mainly used for loading and transporting bulk materials. The load of the steering system changes in a large range and frequently during the working process, which will cause a large amount of overflow loss. Therefore, reducing the energy loss in the steering system of the loader is the key to improving the load of the loader An important way to save ene...

AI Technical Summary

Problems solved by technology

[0003] In recent years, energy recovery mechanisms have begun to be applied to loaders, but the conversion route of the energy recovery system, such as motor-motor-capacitor-motor-pump, has undergone multiple conversions of energy, and there will be a large number of mutual conversions between electric energy and hydraulic energy. Energy loss, which will lead to low recovery efficiency

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