A highly integrated servo-controlled ultra-high pressure proportional cartridge valve

Abstract

The invention relates to a high integration servo control ultrahigh pressure proportional cartridge valve which comprises a main valve element, a valve sleeve, a transition sleeve, a control cover plate, a pilot piston, a reset spring, a displacement sensor feeler rod, a valve cover, a displacement sensor and a pilot servo valve, wherein the lower end of the control cover plate is in sealing connection with the upper end of the transition sleeve; the transition sleeve is in floating connection with the upper end of the valve sleeve; the main valve element is placed in the valve sleeve, and the lower end of the main valve element is in line contact sealing with the valve sleeve port; the pilot piston is placed in the main hole of the control cover plate to be in sealing fit with the control cover plate, and the piston rod at the lower end of the pilot piston is coaxially connected with the main valve element; the upper end of the control cover plate is in sealing connection with the valve cover; the upper end of the displacement sensor feeler rod is connected with the displacement sensor, and the lower end of the displacement sensor feeler rod penetrates through the valve cover in a sealing manner to be coaxially connected with the pilot piston; the reset spring is fixed in the main hole of the control cover plate and at the position above the pilot piston; and the pilot servo valve is connected with the displacement sensor so as to perform electric feedback control on the displacement of the main valve element. According to the high integration servo control ultrahigh pressure proportional cartridge valve, the follow-up effect of the main valve element is improved during the working process, the response speed is increased, the control precision is improved, and the working reliability is enhanced.

Description

technical field [0001] The invention belongs to the technical field of hydraulic system control valves, in particular to a highly integrated servo-controlled ultra-high pressure proportional cartridge valve. Background technique [0002] At present, the field of domestic heavy equipment is developing towards lightweight and high equipment capacity. Therefore, large-scale hydraulic machines and other equipment have begun to introduce ultra-high pressure hydraulic systems. However, the development of ultra-high pressure technology in China lags behind the development of main engines. Cartridge valves are of great significance to improving the technical level of my country's heavy equipment manufacturing. In addition, the traditional ultra-high pressure cartridge valve adopts a separate design of the pilot piston and the main valve core, which will affect the following effect of the main valve core during the working process, and has disadvantages such as slow response speed and...

AI Technical Summary

Problems solved by technology

In addition, the traditional ultra-high pressure cartridge valve adopts the split design of the pilot piston and the main valve core, which will affect the following effect of the main valve core during the working process, and has the disadvantages of slow response speed and low control precision.

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