A high-precision and easy-to-adjust noise reduction balance valve

Abstract

The invention discloses a high-precision and easy-to-adjust noise reduction balance valve. A valve body and an upper cover are provided in the valve body to communicate with a working oil inlet, a working oil return port, a main oil inlet and a main oil return port on the upper cover. The central cavity of the central cavity is provided with an axially sliding valve core, and the outer walls of both ends of the valve core are provided with annular raised sealing surfaces, and an annular raised sealing surface is arranged between the two annular raised sealing surfaces. The annular protrusion is provided with a columnar throttling groove connecting the main oil inlet and the working oil inlet. The inside of the valve core is provided with an axially penetrating middle chamber. The radial pressure regulating channel between the port and the middle cavity, one end of the valve core is sealed, and the other end is provided with a throttling adjustment mechanism that cooperates with the middle cavity, and the medium in the middle cavity pushes the valve core to move to the working position The position where the oil port communicates with the main oil return port. The invention not only can effectively reduce the cavitation noise and vibration at the throttling port, but also has convenient adjustment and maintenance and high control precision.

Description

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

AI Technical Summary

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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