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Combined sealing ring and manufacturing method thereof

A manufacturing method and technology of sealing rings, which can be applied to the sealing of engines, other household appliances, engine components, etc., can solve the problems of easily damaged rubber lips and so on.

Pending Publication Date: 2022-01-04
CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a combined sealing ring to solve the technical problem that the rubber lip is easily damaged after long-term use in the prior art; it also provides a manufacturing method for the combined sealing ring, which is used to process the above combined type sealing ring

Method used

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  • Combined sealing ring and manufacturing method thereof

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Effect test

specific Embodiment 1

[0032] like figure 1 As shown, the combined sealing ring of this embodiment is applied to the main drive system of the shield machine, and the combined sealing ring of this embodiment can also be applied to other large equipment. The inner side of the combined sealing ring is used to cooperate with the rotating shaft to realize rotary sealing.

[0033] The combined sealing ring includes a rubber main body 100 with good rubber elasticity, and the rubber main body 100 is an annular and integral structure. The rubber main body 100 includes an annular main body portion 101 , and the main body portion 101 is fixedly installed on a component radially spaced from the rotating shaft, such as a casing, during use. There is a rubber lip 102 inside the main body 101. The rubber lip 102 extends towards the rotating shaft. The rubber lip 102 includes an elastic waist 103 connected to the main body 101. The thickness of the elastic waist 103 is small, which can ensure that the rubber lip 1...

Embodiment 1

[0052] In Example 1, the PTFE lip-shaped shell is processed by compression molding, which has the advantages of smooth molding surface and the like. In this embodiment, the PTFE lip-shaped housing is processed by integral casting.

specific Embodiment 3

[0054] In Example 1, before brushing the heat-vulcanizing adhesive on the inner surface of the PTFE lip-shaped housing, the inner surface of the PTFE lip-shaped housing is activated under a nitrogen atmosphere to form a carbonized layer. In this embodiment, the thermal vulcanization adhesive is directly brushed on the inner surface of the PTFE lip housing without further activation treatment.

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Abstract

The invention relates to a combined sealing ring and a manufacturing method thereof. The combined sealing ring comprises a rubber body and a PTFE sealing lip, wherein an annular rubber lip is arranged on the inner side of the rubber body, and the rubber lip is used for extending towards a rotating shaft; and the PTFE sealing lip wraps and is fixed to the outer portion of the rubber lip, and the PTFE sealing lip is used for abutting against the rotating shaft so as to be in sealing fit with the rotating shaft. The PTFE sealing lip wraps the rubber lip, so that the whole rubber lip can be protected, the phenomena of swelling, aging and cracking of the rubber lip after long-time use are prevented, the abrasive wear of the rubber lip is delayed, silt and broken stones can be protected, the rubber lip is prevented from being damaged, and the service life of the rubber lip is prolonged.

Description

technical field [0001] The invention belongs to the technical field of large-scale equipment sealing, and in particular relates to a combined sealing ring and a manufacturing method thereof. Background technique [0002] In the shield machine industry, the main drive system is the "heart" of the shield machine, and the main drive seal is called the "diaphragm of the heart". Damage to the main drive seal will cause severe wear and even failure of the main drive parts. At present, the reasons for the failure of the shield seal are mainly frictional heat generation, grease erosion, and rotational torque, which lead to abrasion defects of the sealing lip, and lip wear and tear. [0003] In order to solve this problem, the Chinese invention patent application with the application publication number CN108953612A discloses a shaft sealing device, which includes a rubber part and a PTFE part made of PTFE (polytetrafluoroethylene, commonly known as Teflon), and the PTFE part has The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/3204F16J15/3284F16J15/328B29C43/02B29C35/02B29L31/26
CPCF16J15/3204F16J15/3284F16J15/328B29C43/02B29C35/02B29L2031/265
Inventor 孙志洪彭占杰龙伟漾李佳衡赵明恩王明波
Owner CHINA RAILWAY ENGINEERING EQUIPMENT GROUP CO LTD