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Mechanical seal

A mechanical seal and seal ring technology, which is applied in the direction of engine seals, mechanical equipment, engine components, etc., can solve problems such as deformation, retainer damage, and excessive fitting force

Pending Publication Date: 2021-12-28
EAGLEBURGMANN JAPAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fitting force of the retaining part to the outer circumference of the rotary seal ring is designed according to the difference between the inner diameter of the retaining part before shrink fit and the outer diameter of the rotary seal ring. When the mechanical seal is used, when the annular joint is deformed by the pressure of the sealed fluid , the holding part will be further displaced from the shrink-fit state, and the fitting force will become too large, and there is a possibility that not only the sliding surface of the rotary seal ring will be deformed, but also the retainer will be damaged.

Method used

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  • Mechanical seal
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Experimental program
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Effect test

Embodiment

[0033] For the mechanical seal involved in the embodiment, refer to Figure 1 to Figure 3 , for illustration. In addition, in this embodiment, the inner diameter side of the rotary seal ring and the stationary seal ring constituting the mechanical seal are set as the leakage side, that is, the atmospheric side (low pressure side), and the outer diameter side is set as the sealed fluid side (high pressure side). illustrate.

[0034] figure 1 The mechanical seal 1 for general industrial machinery is a built-in type, which seals the liquid to be sealed that wants to leak from the outer diameter side toward the inner diameter side of the sliding surface, and is mainly composed of a rotating seal ring 20 and a stationary seal ring 10. The ring 20 is annular, and as a sealing ring, it can be set in a state where the rotating shaft 2 rotates with the sleeve 3 fixed to the rotating shaft 2. The stationary sealing ring 10 is annular, and as a sealing ring, it can be installed in the ...

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PUM

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Abstract

Provided is a mechanical seal in which a sliding surface of a sealing ring is not deformed and a retainer is not easily damaged. A mechanical seal 1 comprises a pair of sealing rings 10 and 20 that rotate relative to each other and a retainer 11 that holds the sealing ring 10, the retainer 11 including an annular base portion 11a, an annular holding portion 11c that fits around the outer periphery of the sealing ring 10, and an annular connecting portion 11b for axially connecting the base portion 11a and the annular holding portion 11c, and an annular space S surrounded by the base portion 11a, the annular connecting portion 11b, and the annular holding portion 11c being formed between the outer circumference of the sealing ring 10 and the inner circumference of the retainer 11, wherein a beam 110 that connects the base portion 11a and the annular holding portion 11c is formed in the retainer 11 in the annular space S.

Description

technical field [0001] The present invention relates to a mechanical seal for shaft sealing a rotating shaft. Background technique [0002] Conventional mechanical seals seal the gap between the housing and the rotating shaft by relatively rotating a stationary seal ring fixed to the housing and a rotating seal ring fixed to the rotating shaft and rotating together with the rotating shaft. [0003] For example, in a conventional mechanical seal, a rotary seal ring is fixed to a rotary shaft via a retainer. The retention of the retainer to the rotary seal ring is performed by so-called shrink-fit. After the retainer is heated and thermally expanded, the rotary seal ring is inserted, and the retainer is cooled to make it fit. Shrink, and fit the ring-shaped holding part protruding from the inner periphery of the retainer toward the inner diameter side on the outer periphery of the rotary seal ring. Since the outer circumference of the rotary seal ring is pressed against the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J3/04
CPCB33Y80/00F16J15/3468F16J15/363F16J15/348F16J15/3476F16J15/34
Inventor 喜藤雅和
Owner EAGLEBURGMANN JAPAN