Novel hydraulic balance valve

Abstract

The invention discloses a novel hydraulic balance valve, which reduces the volume of the balance valve and reduces its vibration noise. The check valve spool axis and the main spool axis of the new balance valve are arranged side by side in parallel, which meets the structural requirements of saving space and reduces vibration and noise; in order to enhance the hydraulic clamping of the main spool and lower the control piston force, using the method of opening pressure equalizing grooves, and under the premise of ensuring that the total length of the balance valve core will not be too long, while ensuring that the clamping force is reduced, three equalizing pressure grooves are opened; the side of the pressure equalizing groove is in line with the valve The axis of the body hole is vertical, and the side of the pressure equalizing groove is perpendicular to the axis of the valve body hole to improve the practicability of the overall structure; the balance valve spool uses a spring to ensure that the spool returns to in situ.

Description

technical field [0001] The invention relates to a novel hydraulic balance valve, which is especially suitable for mining machinery. Background technique [0002] The hydraulic balance valve is a key component in the balance circuit, and it is widely used in modern engineering machinery, especially in hoisting machinery. When the hoisting, luffing and telescopic mechanisms of the crane are descending, in the case that the direction of movement is the same as that of the load, a sufficient back pressure must be set on the oil return side to balance the load, so as to ensure the smooth movement of the actuator. In order to improve the stability of the hydraulic system, the balance valve has a great influence on the overall stability, reliability and system efficiency of the hydraulic system. Balance circuit is a basic circuit in hydraulic transmission, which widely exists in mechanical fields such as engineering, construction and metallurgy. The performance of the hydraulic b...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of large volume and high vibration and noise of the original balance valve, the present invention maintains the advantages of the traditional balance valve and reduces the pressure required for the pilot port of the balance valve as much as possible; Ensure that the size of the valve body will not be too large, and at the same time effectively reduce the clamping force; start from the problem of poor economy of the existing balance circuit, redesign the structure of the balance valve on the basis of the existing balance valve principle, and improve the response time and volatility, greatly reducing the control pressure, and also played a very positive role in improving efficiency and saving energy.

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