Electro-hydraulic valve control displacement module and using method thereof

Abstract

The invention relates to an electro-hydraulic valve control displacement module and a using method thereof. The electro-hydraulic valve control displacement module comprises a stepping motor, a transmission rod, a feedback connecting rod, a three-position three-way valve, a linear variable differential transformer, a differential cylinder and a differential cylinder sleeve. The stepping motor is in transmission connection with the transmission rod. The differential cylinder sleeve is fixedly connected with the differential cylinder. The top end of the feedback connecting rod is hinged to the three-position three-way valve, and the bottom end of the feedback connecting rod is hinged to the differential cylinder sleeve. The two sides of the feedback connecting rod are hinged to the transmission rod and the linear variable differential transformer respectively. By means of the linear variable differential transformer and the feedback connecting rod, motion information of the stepping motor and the differential cylinder is fed back to a single-chip microcomputer in real time, by means of accurate calculation of the single-chip microcomputer, the displacement relation between the stepping motor and the differential cylinder can be accurately controlled, an operator can control the displacement relation conveniently and accurately, and therefore accurate adjustment is achieved.

Description

technical field [0001] The invention relates to an electro-hydraulic valve-controlled displacement module and a using method thereof, belonging to the technical field of hydraulic pressure. Background technique [0002] As an important part of hydraulic components, control valves are widely used in real life and construction machinery, and displacement control valves are one of the most widely used ones. However, different valves have different functions in different occasions. With the development of science and technology, electronic control systems are gradually applied to traditional purely mechanical structural components, making certain tasks easier. [0003] Chinese patent document CN203009444U discloses a new type of electronically controlled pumping oil cylinder based on magnetostrictive sensors, including two magnetostrictive sensors and two oil cylinders, and the magnetic rulers of the two magnetostrictive sensors are installed on the pistons of the two oil cylind...

AI Technical Summary

Problems solved by technology

Utilizing this characteristic, the input current of the pump can be changed, and the output flow of the pump can be reduced, so that the commutation is softer and the system impact is smaller when commutating, but the structure of the invention is complicated, and two magnetostrictive sensors are installed on two The interior of the piston rod is relatively difficult, and the present invention cannot achieve the purpose of precisely controlling the displacement

[0004] In the hydraulic system applied to construction machinery, due to the large change in the flow required by each actuator within a working cycle and the high precision required, such as the variable plunger pump of the hydraulic system in the excavator, in different working conditions, the plunger pump Different flow changes are required, and the inclination angle of the swash plate needs to be changed accordingly. In the past, it was adjusted by purely mechanical structure feedback. Its structure is complicated, its precision is low, and its maintenance is difficult.

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