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Anti-rotation guide structure for low-friction valve rod

A guiding structure, low friction technology, applied in valve devices, engine components, mechanical equipment, etc., can solve the problem of increasing valve opening and closing torque, and achieve the effect of reducing valve opening and closing torque and reducing friction.

Pending Publication Date: 2019-06-25
SUFA TECH IND CNNC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Straight-stroke valves such as gate valves and globe valves usually need to design the anti-rotation guide structure of the valve stem to meet the needs of valve opening and closing. However, the general anti-rotation guide structure is sliding friction, which will generate a large friction between the guide surfaces. force, leading to an increase in the opening and closing torque of the valve, which has a negative impact on the valve

Method used

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  • Anti-rotation guide structure for low-friction valve rod
  • Anti-rotation guide structure for low-friction valve rod

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Embodiment Construction

[0014] The present invention will be further described below by means of the accompanying drawings and specific embodiments.

[0015] Such as figure 1 As shown, a low-friction valve stem anti-rotation guide structure with balls includes a stationary guide rib 1 and an anti-rotation plate 2 that can slide up and down along the guide rib 1 at one end.

[0016] Such as figure 2 As shown, the mounting surface of the anti-rotation plate 2 is processed with a spherical groove 4, and a ball 3 is placed in the spherical groove 4. The depth of the spherical groove is less than the diameter of the ball, and the lower surface of the guide rib 1 is in contact with the ball 3.

[0017] The anti-rotation plate 2 can be driven by a device such as a motor, so that one end thereof slides up and down along the guide rib 1 .

[0018] In order to make the anti-rotation plate 2 and the guide rib 1 be positioned, a moving chute can be processed on the lower surface of the guide rib 1, and the up...

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Abstract

The invention belongs to the valve design technology, and particularly relates to an anti-rotation guide structure for a low-friction valve rod. The anti-rotation guide structure for the low-frictionvalve rod comprises a static non-movable guide rib and an anti-rotation plate with one end capable of sliding up and down along the guide rib, the installation surface of the anti-rotation plate is provided with spherical grooves, balls are arranged in the spherical grooves, the depth of the spherical grooves is smaller than the diameter of the balls, and the lower surface of the guide rib is in contact with the balls. Since the clearance X between the guide rib and the anti-rotation plate is smaller than the diameter of the balls, the balls can not fall off all the time during the up-down sliding of the anti-rotation plate along the guide rib, the sliding friction between the anti-rotation plate and the guide rib is changed into rolling friction, and the rolling friction force under the same condition is lower than the sliding friction force, so that the friction force between guide surfaces is reduced, and the opening and closing torque of a valve is remarkably reduced.

Description

technical field [0001] The invention belongs to valve design technology, in particular to a low-friction valve stem anti-rotation guiding structure. Background technique [0002] Straight-stroke valves such as gate valves and globe valves usually need to design the anti-rotation guide structure of the valve stem to meet the needs of valve opening and closing. However, the general anti-rotation guide structure is sliding friction, which will generate a large friction between the guide surfaces. Force, resulting in an increase in the opening and closing torque of the valve, which has a detrimental effect on the valve. Contents of the invention [0003] The purpose of the present invention is to provide a low-friction valve stem anti-rotation guiding structure, which can significantly reduce the opening and closing torque of the valve. [0004] Technical scheme of the present invention is as follows: [0005] A low-friction valve stem anti-rotation guide structure, includin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K51/00
Inventor 李军业王德军
Owner SUFA TECH IND CNNC
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