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PTFE resin composite material of sealing ring with high thermal conductivity used for rotating shaft and preparation method thereof

A resin composite material and high thermal conductivity technology, applied in the field of composite materials, can solve the problems of small friction coefficient, thermal stability, poor dimensional stability, and low dielectric strength, etc., and achieve increased thermal conductivity, reduced thermal expansion coefficient, and increased thermal conductivity. Effect

Inactive Publication Date: 2017-12-15
NANJING COMPTECH COMPOSITES CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polytetrafluoroethylene (PTFE) is a polymer material with excellent comprehensive properties. It has excellent high and low temperature resistance and chemical corrosion resistance, and has excellent dielectric properties, extremely small friction coefficient and good thermal stability. It can be used in- Long-term use at 260°C~260°C, but pure PTFE has disadvantages such as cold flow, poor dimensional stability, low dielectric strength, and large wear.

Method used

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  • PTFE resin composite material of sealing ring with high thermal conductivity used for rotating shaft and preparation method thereof
  • PTFE resin composite material of sealing ring with high thermal conductivity used for rotating shaft and preparation method thereof

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Embodiment 1-4

[0023] The preparation method of the sealing ring for the high thermal conductivity rotating shaft of the scroll compressor of the air conditioner comprises the following steps:

[0024] (1) Carbon fibers are soaked in acetone, washed, dried, added to acid solution at 60-70°C and stirred for 0.5-2 hours, filtered, washed until neutral, and acidified carbon fibers are obtained;

[0025] (2) Weigh the raw materials according to the amount, add them to the high-speed mixer, stir at high speed for 2-3 minutes, take them out, and place them for 2-6 hours;

[0026] (3) Use a press for cold pressing, with a pressure of 10~30MPa, a holding time of 1min, and demoulding to obtain a preformed sample;

[0027] (4) Put the preformed sample into the sintering furnace, sinter at 400±5°C for 3~6h, cool down to room temperature naturally with the furnace, and machine to obtain the wear-resistant and dust-proof sealing strip for the air scroll compressor.

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Abstract

The invention discloses a PTFE resin composite material of a sealing ring with high thermal conductivity used for a rotating shaft. The PTFE resin composite material consists of the following components in percentage by mass: 5%-15% of carbon fiber, 5%-8% of nano-silicon carbide, 3%-10% of indium nitride, 2%-4% of alumina, 1%-2% of a coupling agent and the balance of PTFE. The invention also discloses a preparation method of the PTFE resin composite material. In the PTFE resin composite material and the preparation method disclosed by the invention, by adding the carbon fiber to the PTFE, the tensile, compressive and flexural moduli of the material can be increased, the thermal expansion coefficient can be decreased, and the potential hazard of leakage caused by expansion after the temperature rises can be reduced; meanwhile, the creep deformation can also be reduced, the hardness can be improved, and the thermal conductivity is increased simultaneously, so that friction heat can be quickly transferred out. The carbon fiber is subjected to modification treatment so as to be well dispersed in the PTFE. Through combination of nano-silicon carbide, alumina and indium nitride, the thermal conductivity of the material can be effectively improved, and the sealing ring with high thermal conductivity used for the rotating shaft made from the PTFE resin composite material disclosed by the invention has high thermal conductivity and can timely conduct out friction heat on the rotating shaft.

Description

technical field [0001] The invention relates to a PTFE resin composite material for a high thermal conductivity rotating shaft seal ring used in a scroll compressor of an air conditioner on a new energy vehicle and a preparation method thereof, belonging to the field of composite materials. Background technique [0002] Polytetrafluoroethylene (PTFE) is a polymer material with excellent comprehensive properties. It has excellent high and low temperature resistance and chemical corrosion resistance, and has excellent dielectric properties, extremely small friction coefficient and good thermal stability. It can be used in- Long-term use at 260°C~260°C, but pure PTFE has disadvantages such as cold flow, poor dimensional stability, low dielectric strength, and large wear. [0003] New energy vehicles with electric motors as the main power generally use air-conditioning scroll compressors as cooling power. The air conditioner scroll compressor is a compressor that compresses ref...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08K13/06C08K9/02C08K7/06C08K3/34C08K3/28C08K3/22C09K5/14
CPCC08K13/06C08K3/22C08K3/28C08K3/34C08K7/06C08K9/02C08K2003/2227C08K2201/003C08K2201/011C09K5/14C08L27/18
Inventor 杨文光杨烨靳予孙佳青孙克原陈佩民陈朝曦焦小东陈银
Owner NANJING COMPTECH COMPOSITES CORP
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