Novel high-speed switch valve

Abstract

A new type of high-speed on-off valve is composed of a valve body, a valve seat, a valve stem and a sealing ring. In order to solve the contradiction between large flow and high response, a multi-flow surface valve core structure is adopted to achieve large flow under small stroke and low pressure difference. A small hole is used to communicate with the annular groove for drainage; the spool structure is based on the spool structure of the cone valve. The traditional cone valve structure has only one oil outlet flow surface. It is difficult to achieve a large flow rate in order to ensure the response speed under a certain spool diameter. ;When the valve port is closed, the imported hydraulic oil acts on the matching taper surface of the valve core and the valve seat, and at the same time, the imported pressure oil is led to the force balance plate on the left side of the valve core through the oil passage on the valve body, and the force balance plate on the left side The area is equal to the sum of the areas of the taper surfaces where the spool and seat fit together. At this time, the hydraulic pressure at both ends of the spool is balanced and is only affected by the return spring force.

Description

Technical field [0001] The invention relates to a novel high-speed on-off valve, which is especially applied to electro-hydraulic digital technology products. Background technique [0002] With the wide application of electro-hydraulic digital technology, the engineering field puts forward new requirements for high-speed switching valves. The flow rate and response speed of the high-speed switching valves developed at present are difficult to meet the engineering needs, and the performance of the high-speed switching valves directly affects the performance of the electro-hydraulic digital system, so the research on high-speed switching valves is increasingly being received by domestic and foreign countries. attention of foreign scholars. Research on high-speed on-off valves with large flow rate and ultra-high response is also the focus of current high-speed on-off valve research. The main factor affecting the performance of high-speed on-off valves is the response speed of ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the existing high-speed switching valve cannot handle the contradiction between large flow rate and high response at the same time, the present invention provides a new type of high-speed switching valve, which has a good response speed and improves the valve body at the same time. flow, on the basis of ensuring the working ability, improving the working reliability

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