High-precision noise elimination balance valve easy to adjust

Abstract

The invention discloses a high-precision noise elimination balance valve easy to adjust. The high-precision noise elimination balance valve easy to adjust comprises a valve body and an upper cover, a center cavity communicating with a working oil inlet, a working oil return opening, a main oil inlet and a main oil return opening in the upper cover is formed in the valve body, a valve element sliding in the axial direction is arranged in the center cavity, annular protruding sealing faces are arranged on the outer walls of the two ends of the valve element, an annular protrusion is arranged between the two annular protruding sealing faces, and a columnar throttling groove connected with the main oil inlet and the working oil inlet is formed in the annular protrusion; and an axially-through middle cavity is formed in the valve element, the valve element and the working oil inlet are provided with a radial pressure adjusting channel communicating with the working oil inlet and the middle cavity in a matched mode, one end of the valve element is sealed, a throttling adjusting mechanism matched with the middle cavity is arranged at the other end of the valve element, and a medium in the middle cavity pushes the valve element to move to the position where the working oil inlet communicates with the main oil return opening under the action of the throttling adjusting mechanism. According to the high-precision noise elimination balance valve easy to adjust, cavitation noise and vibration at the throttling opening can be effectively reduced, adjustment and maintenance are convenient and fast, and the control precision is high.

Description

technical field [0001] The invention relates to the technical field of balance valves, in particular to a high-precision and easy-to-adjust noise reduction balance valve. Background technique [0002] As a key component of the performance of the hydraulic control system, the balance valve provides a strong guarantee for the reliability, safety and stability of the system. However, for the occasions of large load, high flow rate and high pressure drop, if the load and pressure drop of the conventional balance valve are too large during use, it is easy to cause fluid vibration and high noise, resulting in the problem of low adjustment accuracy of the balance valve . In order to improve the regulating function in the prior art, most researchers have done some research on the sealing and packing structure of the V-shaped ball valve, most of which are to increase the diaphragm from the structure to adjust the pressure. For example, the application is January 31, 2011, publicatio...

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Problems solved by technology

[0003] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a high-precision and easy-to-adjust noise-eliminating balance valve, which solves the technical problems of the existing balance valve in the medium environment with large load and high flow rate, such as fluid excitation, high noise, and poor adjustment accuracy.

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