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Sealing assembly and vertical thrust sliding bearing

A thrust sliding bearing and sealing component technology, applied in the field of nuclear power, can solve problems such as poor thermal stability, seal failure, and enlarged sealing gap, so as to avoid gap leakage and solve oil leakage.

Pending Publication Date: 2022-01-21
CNNC NUCLEAR POWER OPERATION MANAGEMENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the material of the sealing seat is Q235A, and the material of the floating sealing ring is polyimide, which has poor thermal stability. During operation, the floating sealing ring is reduced in size, deformed in structure due to friction and wear, and the sealing gap becomes larger, resulting in seal failure.

Method used

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  • Sealing assembly and vertical thrust sliding bearing
  • Sealing assembly and vertical thrust sliding bearing

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] figure 1 It is an axial sectional view of a sealing assembly shown according to an exemplary embodiment. Such as figure 1 As shown, the sealing assembly may include: a sealing seat 1 and a sealing ring 2;

[0022] As an example of this embodiment, the seal seat 1 is an annular structure, and the seal seat 1 is sleeved on the outside of the thrust head 3 of the vertical thrust sliding bearing, and there is a gap between the side wall of the inner ring of the seal seat 1 and the outer wall of the thrust head 3 . For example, the width of the gap between the inner ring side wall of the sealing ring and the outer side wall of the thrust head is 0.05-0.35 mm. The width of the gap between the side wall of the inner ring of the sealing seat and the outer wall of the thrust head is 0.05-0.25 mm.

[0023] The side wall of the inner...

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Abstract

The invention belongs to the technical field of nuclear power, and particularly relates to a sealing assembly and a vertical thrust sliding bearing. According to the sealing assembly, the circumferential grooves extending outwards in the radial direction are formed in the side wall of the inner ring of a sealing seat from top to bottom, a large amount of oil mist generated during high-speed rotation of a main engine is absorbed and decompressed step by step, and sufficient time is provided for oil mist condensation; and a plurality of axial through holes formed in the side wall of the lower end of each groove can guide oil drops condensed by oil mist in the groove to flow back to a bearing oil tank under the action of gravity. Therefore, oil mist is effectively prevented from leaking from a gap between a sealing ring and the sealing seat, and the problem of oil leakage of the bearing is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of nuclear power, and in particular relates to a sealing assembly and a vertical thrust sliding bearing. Background technique [0002] In related technologies, the vertical thrust bearings of nuclear power plant condensate pumps generally suffer from serious oil leakage from bearing oil seals, frequent historical defects, and often require refueling due to low oil levels, threatening the normal and stable operation of the equipment. [0003] The thrust sliding bearing on the upper part of the condensate pump is used to bear the axial force and radial force of the pump. The bearing adopts self-lubricating method, and the lubricating oil is cooled by the copper wire reed tube oil-water cooler installed inside the bearing chamber. The top of the bearing adopts a sealing structure combining a sealing seat and a floating ring. There is a floating amount of 2 mm on one side between the outer side of the floating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/02F04D29/00F04D29/046F04D29/06F04D29/12
CPCF04D29/046F04D29/061F04D29/126F04D29/026F04D29/007
Inventor 刘强杨秀敏樊鹏飞夏益勤曾映冯毅范伟王宁郭逸李政鲁玲江
Owner CNNC NUCLEAR POWER OPERATION MANAGEMENT
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