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Dynamic sealing structure for rotary shaft

A technology of dynamic sealing structure and rotating shaft, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., and can solve problems such as temperature rise of the ring body, liquid film vaporization, and temperature gradient of the sealing ring.

Inactive Publication Date: 2018-10-30
浙江嘉研密封科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the dynamic sealing ring for the rotating shaft of liquid machinery cannot effectively solve the problem even if the material with high temperature resistance and good thermal conductivity is selected.
Since the sealing ring will generate a large amount of frictional heat during use, the temperature of the ring body will continue to rise when there is no effective heat dissipation channel, resulting in a temperature gradient in the sealing ring, resulting in thermal deformation and thermal cracking of the end face
For poor lubricity and volatile media, problems such as liquid film vaporization are also prone to occur

Method used

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  • Dynamic sealing structure for rotary shaft
  • Dynamic sealing structure for rotary shaft
  • Dynamic sealing structure for rotary shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] When using at low speed figure 1 As shown, the installation cavity of the flange member 2 is provided with an installation groove at the bottom of the inner body, and the sealing ring B is used as a static ring, which is partially arranged in the installation groove, and is connected with the flange member 2 through an anti-rotation pin. The sealing ring A is used as a moving ring. One of the through holes of any pair is connected to the mounting flange by an anti-rotation pin, so that it is fixed on the surface of the sleeve 1 and rotates with it; the other is pressed by the spring of the mounting flange. It is tight to ensure that the seal ring still abuts under the condition of wear.

[0025] The contact surface between the sealing ring A and the inner bottom of the mounting cavity of the flange 2 is sealed by an O-ring 3; the inner side of the sealing ring B and the shaft sleeve 1 are sealed by an O-ring 3.

[0026] in figure 1 In the middle, the left side is the liquid ...

Embodiment 2

[0041] When using at high speed figure 2 As shown, the end face of the mounting flange is provided with a mounting groove, and the sealing ring B is used as a moving ring, which is partially arranged in the mounting groove, and is connected with the mounting flange through an anti-rotation pin, and rotates with it. The installation cavity of the flange part 2 is provided with an installation groove at the bottom of the inner part, and the sealing ring A is used as a static ring, partly placed in the installation groove, and any pair of through holes on the ring surface is connected to the flange part 2 through an anti-rotation pin. , The other part is compressed by the spring of the flange member 2 to ensure that the sealing ring still abuts under the condition of wear.

[0042] The flange member 2 has an opening with the side, and communicates with the through hole of the sealing ring A.

[0043] The contact surface between the sealing ring B and the mounting flange is sealed by ...

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PUM

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Abstract

The invention discloses a dynamic sealing structure for a rotary shaft. The dynamic sealing structure comprises a shaft sleeve and a sealing ring A and a sealing ring B which sleeve the surface of theshaft sleeve; the shaft sleeve is inserted onto a centrally-opened flange part in a communication manner; an assembly cavity is formed in the flange part; the surface of the shaft sleeve is providedwith assembly bosses; the sealing rings A and B are located in the assembly cavity, and are arranged on the surface of the shaft sleeve through matching with the assembly bosses; contact end surfacesare sealed through O-shaped rings; the ring surface of the sealing ring A is provided with a plurality of pairs of through holes which divide the ring surface equally; the sealing ring B is flush withand clings to one side end surface of the sealing ring A, so that the through holes in the ring surface of the sealing ring A are blocked; and a clearance is preserved between the shaft sleeve and the flange part and communicates with the through holes in the ring surface of the sealing ring A. according to the dynamic sealing structure, the clearance is preserved between the sealing rings and the connection flange for liquid to flow in; the through holes are formed in the sealing ring, and the liquid can flow into the sealing ring through the through holes, so that the aim of lowering temperature is realized.

Description

Technical field [0001] The invention relates to an improvement of a liquid sealing structure for a pump. Background technique [0002] For a long time, the development of dynamic seals for rotating shafts of liquid machinery in my country has been slower than that of other seals, and the gap with foreign countries is large. At present, this kind of seals mainly exist in the following forms: flat ring, table ring, L-shaped section ring, ring with anti-rotation groove, T-shaped section ring, rectangular groove ring, etc. As a component used to solve the dynamic seal between the rotating shaft and the body, the sealing ring mainly relies on the combination of the elastic force generated by the elastic element and the pressure of the medium to achieve the sealing effect. By fitting the sealed part, it can effectively prevent the medium from the high pressure end to the low pressure. Leakage at the end. [0003] Limited by material properties, the working environment of the seal ring ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/34
CPCF16J15/3404
Inventor 崔贵胜
Owner 浙江嘉研密封科技有限公司