Oil-free lubricated seal ring resistant to high temperature and high pressure

An oil-free lubrication and high temperature resistant technology, applied in the field of sealing ring, can solve the problems of poor sealing effect, short life of sealing ring, inability to adapt to various parameters and working conditions, etc., and achieve the effect of long life and good sealing effect

Inactive Publication Date: 2006-10-11
沈阳气体压缩机股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high temperature and high pressure oil-free lubricating sealing ring to

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: The sealing ring is made of the following materials (weight percentage example)

[0015] PTFE 65

[0016] carbon fiber 19

[0017] Fiberglass 12

[0018] Molybdenum disulfide 4

[0019] Above-mentioned polytetrafluoroethylene selects particle size above 220 mesh, purity 99%, suspension type polytetrafluoroethylene of tensile strength 27Mpa-35Mpa; Carbon fiber selects particle size 0.02-0.5mm, aspect ratio 10:1-5:1, purity 99% PN grade carbon fiber; glass fiber is particle size 220 mesh, aspect ratio 10:1-5:1, SiO 2 E-glass fiber with a content of 52% and a water content of less than 1%; the particle size of molybdenum disulfide is 320 mesh, and the purity is 99%. Each material can be produced according to the process of selecting raw materials-mixing materials-inspecting-molding-sintering-cooling shrinkage and shaping-mechanical processing.

[0020] The sealing ring described in Example 1 is applied to a through-piston rod circulation compressor, with...

Embodiment 2

[0021] Embodiment 2, the sealing ring adopts the following materials to form (weight percentage example)

[0022] PTFE 71

[0023] carbon fiber 15

[0024] Graphite 11

[0025] Molybdenum disulfide 3

[0026] Above-mentioned polytetrafluoroethylene selects particle size above 220 mesh, purity 99%, suspension type polytetrafluoroethylene of tensile strength 27Mpa-35Mpa; Carbon fiber selects particle size 0.02-0.5mm, aspect ratio 10:1-5:1, purity 99% PN grade carbon fiber; graphite particle size 220-320 mesh, purity 99%; molybdenum disulfide particle size 320 mesh, purity 99%. Each material can be produced according to the process of selecting raw materials-mixing materials-inspecting-molding-sintering-cooling shrinkage and shaping-mechanical processing.

[0027] The sealing ring described in Example 2 is applied to a through-piston rod circulating compressor, which operates normally for 6 months with natural gas medium at a pressure difference of 2.3Mpa and a temperature of...

Embodiment 3

[0028] Embodiment 3, sealing ring adopts following material to form (weight percentage example)

[0029] PTFE 54

[0030] carbon fiber 16

[0031] Graphite 13

[0032] copper powder 17

[0033] Above-mentioned polytetrafluoroethylene selects particle size above 220 mesh, purity 99%, suspension type polytetrafluoroethylene of tensile strength 27Mpa-35Mpa; Carbon fiber selects particle size 0.02-0.5mm, aspect ratio 10:1-5:1, purity 99% PN grade carbon fiber; graphite particle size 220-320 mesh, purity 99%; copper powder particle size 220-320 mesh, tin bronze grade copper powder particle size 99%. Each material can be produced according to the process of selecting raw materials-mixing materials-inspecting-molding-sintering-cooling shrinkage and shaping-mechanical processing.

[0034] The sealing ring described in Example 3 is applied to a certain compressor with air as the medium, and operates normally for 3 months at a pressure difference of 18Mpa and a temperature of 165°C,...

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Abstract

The invention discloses a high-temperature high-pressure resistant non-oil lubricant sealing ring used in compressor. Wherein, the sealing ring is made from (mass percentage): polytetrafluoroethylene in 60-80%; carbon fiber in 6-22%; and filling agent in 5-35%; while the filling agent can be one or several of graphite, glass fiber, molybdenum disulfide and copper powder. The treatment comprises: at normal temperature: selecting raw material - mixing materials - checking - molding pressing - sintering - cooling, contracting and shaping - mechanically processing, to attain sealing ring. The invention has the advantages that: it is resistant to high pressure and high temperature, with long service life, better sealing effect and the application for variable working conditions.

Description

technical field [0001] The invention relates to a sealing ring, in particular to a sealing ring used in a reciprocating compressor. Background technique [0002] At present, there are two types of sealing rings used in reciprocating compressors: one type of metal ring, which requires oil lubrication and causes serious wear and tear on the cylinder and piston rod, which may easily cause the cylinder and piston to be scrapped and affect normal production. The other is filled with polytetrafluoroethylene rings, which can realize oil-free lubrication and sealing; but there are defects such as short life, poor sealing effect, and inability to adapt to various parameters and working conditions during the operation of the compressor. Compared with the life of the sealing ring and the sealing effect, in the structural design of the ring and the applied materials, the applied materials account for more than 70%. There is an urgent need for a high-temperature and high-pressure oil-fr...

Claims

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Application Information

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IPC IPC(8): F04B53/02C08L27/18C08K7/06
Inventor 梁延祥
Owner 沈阳气体压缩机股份有限公司
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