Two-dimensional plug-in type load sensitive valve

Abstract

A two-dimensional plug-in type load sensitive valve comprises an electric-mechanical converter and a valve body which are coaxially connected in sequence, the electric-mechanical converter is a torque motor, the valve body comprises a valve sleeve and a valve element, and the valve element is installed in the valve sleeve in an axial sliding mode. A rear plug sleeve is installed at the right end of the valve element, a high-pressure piston capable of axially sliding is arranged in the rear plug sleeve, and the left end of the high-pressure piston extends out of the rear plug sleeve to abut against the right end of the valve element. A high-pressure sealing head is mounted at the right end of the rear plug sleeve, a high-pressure spring is arranged between the high-pressure piston and the high-pressure sealing head, and the rear plug sleeve, the high-pressure piston and the high-pressure sealing head are matched to form a high-pressure spring cavity. The output end of the torque motor is connected with the valve element through a two-dimensional piston. According to the two-dimensional plug-in type load sensitive valve, input signals are small, hydraulic driving force is large, and normal work under the high-pressure working condition is easy to achieve. The structure is simple and compact, system heating is reduced, and system efficiency is improved; A pilot valve is accurately controlled through a digital controller, the opening degree of a main valve port is pushed to achieve the purpose that the flow of an outlet is not changed, that is, the flow is irrelevant to loads.

Description

technical field [0001] The invention relates to a hydraulic control element in the field of fluid transmission and control, in particular to a two-dimensional plug-in load sensing valve. Background technique [0002] The load sensing system has developed from a simple primary system to the present, and has produced a variety of load sensing principles. Through the development of the load sensing system, it has gradually met the operating requirements of various working conditions of construction machinery and solved problems such as proportionality in the control process of construction machinery actuators. Speed ​​regulation, anti-flow saturation, energy saving and other issues have greatly promoted the improvement of the performance of construction machinery. Today's load-sensing systems can be roughly divided into pre-valve compensation load-sensing systems, post-valve compensation load-sensing systems, and oil return pressure compensation load-sensing systems. Most of t...

AI Technical Summary

Problems solved by technology

The disadvantages are that there are more hydraulic components, more control and adjustment points, large leakage, and poor anti-pollution ability

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