Electronic control valve with valve element position self-feedback mechanism

Abstract

The invention provides an electronic control valve with a valve element position self-feedback mechanism. The electronic control valve comprises a main valve body. A main valve element is arranged onthe lower portion in the main valve body, and the lower portion of the main valve element is connected with the inner lower end of the main valve body through a main spring. A cavity is formed in theupper portion in the main valve body, an electromagnetic proportional directional valve is arranged in the cavity, and comprises a directional valve bush, and the directional valve bush sleeves a directional valve element. A top cover is arranged on the top of the main valve body, an electromagnetic coil is arranged on the top cover, and the top of the directional valve element is connected with the electromagnetic coil. The upper end of the main valve element is fixedly connected with the bottom end of the directional valve bush, and the main valve element can drive the directional valve bushto move. The main valve element and the directional valve bush of the electromagnetic proportional directional valve are fixedly connected together, the main valve element drives the directional valve bush to move while moving, self-feedback closed-loop control of the position of the main valve element is achieved, thus, precision control over the displacement of the main valve element can be achieved by controlling the magnitude of currents, and the control precision is greatly improved.

Description

technical field [0001] The invention relates to the field of electric control valves, in particular to an electric control valve with a valve core position self-feedback mechanism. Background technique [0002] The basis of the automation and intelligence of construction machinery is the electronic control of the hydraulic system, among which the electronic control of the hydraulic valve is the most critical. The electronic control of hydraulic valves refers to the use of electronic control signals to control the movement of the hydraulic valve spool. The size of the electric control signal corresponds to the displacement of the spool one by one, and the movement of the spool to the specified position is controlled by adjusting the electric control signal. How to realize the high-precision and high-response control of the hydraulic valve spool is an urgent problem to be solved today. [0003] Now the most commonly used electric control valve scheme is as follows: figure 1...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem of low control precision of the spool position existing in the existing electric control valve, the present invention provides an electric control valve with a spool position self-feedback mechanism, which can accurately control the spool position

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