Direct-acting pressure reducing and releasing valve

Abstract

The invention relates to the technical field of hydraulic valves, in particular to a direct-acting pressure reducing and releasing valve. The direct-acting pressure reducing and releasing valve comprises a valve seat, a valve sleeve and a valve element; a third oil port is formed in the outer wall of the valve seat, an oil drainage port is further formed in the outer wall of the valve seat, and a first oil port and a second oil port are formed in the outer wall of the valve sleeve; an oil inlet and an overflow port are further formed in the outer wall of the valve sleeve, the oil inlet communicates with the second oil port, and the overflow port can communicates with the third oil port; the valve element can move in the axial direction of the direct-acting pressure reducing and releasing valve, so that the second oil port and the first oil port can communicate or be separated through the oil inlet, and the third oil port and the first oil port can communicated or be separated through the overflow port; and the direct-acting pressure reducing and releasing valve further comprises a buffering structure, and the buffering structure is arranged on the valve element and / or the valve sleeve and can buffer vibration of the valve element. The direct-acting pressure reducing and releasing valve has the advantages that vibration of the valve element is relieved when the pressure of a hydraulic system changes sharply, and the problem of squeal of the direct-acting pressure reducing and releasing valve is solved.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a direct-acting pressure reducing and releasing valve. Background technique [0002] The pressure reducing valve is one of the oil pressure control components of the hydraulic system. Because of its easy installation, small size, sensitive action, high control precision, and convenience, it has become the first choice for fluid control automation. [0003] When the existing direct-acting pressure relief valve is in use, when the pressure of the hydraulic system changes sharply, the pressure of the second oil port will change sharply accordingly, resulting in the pressure change in the first oil port, and the valve core will vibrate. As a result, the direct-acting pressure reducing and releasing valve whistles, which brings inconvenience to use. Contents of the invention [0004] In order to solve the above problems, the present invention provides a direct-acting press...

AI Technical Summary

Problems solved by technology

[0003] When the existing direct-acting pressure relief valve is in use, when the pressure of the hydraulic system changes sharply, the pressure of the second oil port will change sharply accordingly, resulting in the pressure change in the first oil port, and the valve core will vibrate. As a result, the direct-acting pressure reducing and releasing valve whistles, which brings inconvenience to the use

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