High frequency response large flow proportional valve and control system thereof

Abstract

The invention belongs to the technical field of proportional valves and particularly relates to a high frequency response large flow proportional valve and a control system thereof. The high frequencyresponse large flow proportional valve comprises a valve body, a valve sleeve, a valve element, a first connecting mechanism, a first power device, a first displacement sensor, a second connecting mechanism, a second power device and a second displacement sensor, wherein the valve sleeve is mounted in the valve body in a sleeving manner; the valve element is mounted in the valve sleeve in a sleeving manner; one end of the valve sleeve is connected with the first power device through the first connecting mechanism; the first displacement sensor is arranged between the valve sleeve and the first power device; one end of the valve element is connected with the second power device through the second connecting mechanism; and the second displacement sensor is arranged between the valve elementand the second power device. The high frequency response large flow proportional valve controls the valve element and the valve sleeve to move simultaneously, so that the opening and closing speed, the maximum opening degree and the maximum throughput of the valve port are increased. The high frequency response large flow proportional valve is used for controlling the liquid flow rate and direction.

Description

technical field [0001] The invention belongs to the technical field of proportional valves, in particular to a high-response and large-flow proportional valve and its control system. Background technique [0002] The electro-hydraulic proportional valve is a hydraulic component between the on-off hydraulic valve and the electro-hydraulic servo valve using proportional control technology. The conventional proportional valve is fixed with the valve sleeve embedded in the valve body, and the valve core is driven by the electromagnet. It moves in the valve sleeve to control the opening of the valve port; however, since the valve sleeve is fixed, only the valve core is moving, and the opening and closing speed of the valve port is limited, that is, the frequency response of the proportional valve is not high. Contents of the invention [0003] In view of the above-mentioned technical problem of low frequency response of the proportional valve, the present invention provides a h...

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Problems solved by technology

[0002] The electro-hydraulic proportional valve is a hydraulic component between the on-off hydraulic valve and the electro-hydraulic servo valve using proportional control technology. The conventional proportional valve is fixed with the valve sleeve embedded in the valve body, and the valve core is driven by the electromagnet. Movement in the valve sleeve to control the opening of the valve port; however, because the valve sleeve is fixed, only the valve core is moving, and the speed of opening and closing of the valve port is limited, that is, the frequency response of the proportional valve is not high

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