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Novel proportional reversing valve

A proportional reversing valve, a new type of technology, applied in valve details, multi-way valves, valve devices, etc., can solve the problem of slow dynamic response time of reversing valves, and achieve the effects of improving dynamic response, reducing response time, and increasing speed

Pending Publication Date: 2021-12-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of the hysteresis loop of the small opening and the slow dynamic response time in the large opening of the existing reversing valve, the present invention proposes a new proportional reversing valve

Method used

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  • Novel proportional reversing valve
  • Novel proportional reversing valve
  • Novel proportional reversing valve

Examples

Experimental program
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Embodiment Construction

[0024] The present invention is a new type proportional reversing valve, which is based on the existing proportional reversing valve, adding a first stepping motor (1) and a stepping motor (11) to directly drive the valve core in the axial direction of the valve core. And a rotatable valve sleeve (7) is designed, the third stepper motor (9) can control the rotation of the valve sleeve (7), wherein the cross section of the valve sleeve (7) and the flow path at the pressure oil P port of the valve body is variable , changing the rotation angle of the valve sleeve (7) can control the flow area of ​​the above-mentioned flow channel.

[0025] A progressively increasing variable stiffness spring (4) is installed at both ends of the spool, the spring (4) is a helical cylindrical spring with unequal pitch, and the spring stiffness increases with the increase of the compression amount.

[0026] Such as figure 1 As shown, the new proportional directional control valve with mechanical o...

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PUM

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Abstract

The invention discloses a novel proportional reversing valve, and belongs to the field of machinery. The valve comprises a first stepping motor, a ball screw nut, a left displacement sensor, a variable stiffness spring, a valve core, a valve body, a valve sleeve, a gear pair, a third stepping motor, a right displacement sensor and a second stepping motor. The first stepping motor and the second stepping motor are rigidly connected with the valve body through connecting pieces, and the rotation axis of the first stepping motor and the rotation axis of the second stepping motor coincide with the axis of the valve core. An output shaft of the third stepping motor is mounted at the position of a driving gear of the gear pair; and the left displacement sensor and the right displacement sensor are both installed at the extending end of the valve core and used for detecting the displacement of the valve core. The valve sleeve is arranged in the valve body. Open-loop control under a small opening degree can be achieved, and the influence of lagging on valve core motion control is reduced.

Description

technical field [0001] The invention relates to a method for controlling opening of a valve port of a proportional reversing valve under different working conditions, in particular to a novel proportional reversing valve structure. Background technique [0002] The reversing valve is a valve that uses the difference in the relative position between the valve core and the valve body to change the on-off relationship between the various oil ports on the valve body, thereby realizing the connection, cutting off or changing the direction of the liquid flow of each oil circuit. The reversing valve is also a type of valve with the largest amount, the most complicated variety and name in the hydraulic system. [0003] After the valve port of the reversing valve is opened, due to the change of the liquid flow, the liquid flow will exert a force on the valve core, which is called hydraulic force. When the opening of the valve port is constant, changes in factors such as load and flo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/20F16K31/04F16K31/36F16K31/50F16K31/53F16K37/00
CPCF16K11/20F16K31/046F16K31/50F16K31/36F16K31/041F16K31/535F16K37/0083
Inventor 杨敬张磊权龙
Owner TAIYUAN UNIV OF TECH