Valve element structure of proportional reversing valve

Abstract

The invention provides a valve element structure of a proportional reversing valve, and belongs to the field of reversing valve manufacturing. The valve element structure is installed in a shell in a sliding mode, a high-pressure oil port and at least one working oil port are formed in the shell, a sliding hole is formed in the shell, and a valve element is arranged in the sliding hole in a sleeved mode and seals the sliding hole through the radial face of the valve element; the valve element slides so that a gap can be formed between the radial end face of the valve element and the sliding hole, and the gap is used for communicating the high-pressure oil port with the working oil port; when the valve element is located at the middle position, the face, making contact with the sliding hole, of the valve element is a shoulder sealing face; and reducing frustums are arranged on the edges of the two sides of the shoulder sealing face, and at least one throttling groove is formed in the radial face of each reducing frustum. The reducing frustum is adopted as a full-circumference flow opening of the valve element, the throttling groove with the radial opening is formed in the reducing frustum, and the valve element structure is very suitable for the application occasions that the flow control requirement is high under a small opening and the overflowing pressure is reduced under a large opening.

Description

technical field [0001] The invention relates to valve manufacturing technology, in particular to a valve core structure of a proportional reversing valve, and belongs to the technical field of hydraulic equipment manufacturing. Background technique [0002] As a hydraulic component to control the on-off and reversing of the oil circuit, the reversing valve is widely used. The common reversing valve is a slide valve structure, and its spool slides in the valve body. By switching the direction of the spool, different oil ports are connected or closed. [0003] Because the opening of the proportional directional control valve can change with the change of the control command, it can realize continuous adjustment of the movement speed of the actuator by adjusting the overflow of the proportional directional control valve. The control is simple and convenient, and the control precision is high. [0004] In the proportional reversing valve in the prior art, most of the throttling...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a new spool structure of proportional reversing valve, by designing a radial throttling groove and a variable-diameter cone frustum with full-circumferential openings on the edge of the sealing end face of the spool to solve the high flow control requirements for small openings. , the technical problem of throttling control in applications where the overcurrent pressure is reduced under a large opening

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