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Polytetrafluoroethylene composite, polytetrafluoroethylene composite holder for bearing and preparation method of polytetrafluoroethylene composite holder for bearing

A technology of polytetrafluoroethylene and composite materials, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems that cannot meet the requirements of dn value bearing working conditions, achieve excellent self-lubricating performance, enhance friction and wear performance, Effects of improving thermal conductivity and friction and wear properties

Active Publication Date: 2017-01-11
LUOYANG BEARING RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a polytetrafluoroethylene composite material, so as to solve the problem that the existing glass fiber modified polytetrafluoroethylene composite material used for ultra-low temperature and high-speed bearing cages cannot meet the requirements of bearing working conditions with a dn value greater than 1.5 million The problem

Method used

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  • Polytetrafluoroethylene composite, polytetrafluoroethylene composite holder for bearing and preparation method of polytetrafluoroethylene composite holder for bearing
  • Polytetrafluoroethylene composite, polytetrafluoroethylene composite holder for bearing and preparation method of polytetrafluoroethylene composite holder for bearing
  • Polytetrafluoroethylene composite, polytetrafluoroethylene composite holder for bearing and preparation method of polytetrafluoroethylene composite holder for bearing

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Embodiment 1

[0047] The polytetrafluoroethylene composite material of this embodiment is composed of the following components in mass percentage: 3% of KH-570 modified nano-alumina, 5% of molybdenum disulfide, and 92% of polytetrafluoroethylene.

[0048] The polytetrafluoroethylene composite cage for bearings in this embodiment is composed of the following components in mass percentage: KH-570 modified nanometer aluminum oxide 3%, molybdenum disulfide 5%, polytetrafluoroethylene 92%.

[0049] The preparation method of the polytetrafluoroethylene composite cage for the bearing of the present embodiment comprises the following steps:

[0050] 1) Nano-alumina is placed in the container of the absolute ethanol solution of silane coupling agent KH-570 with a mass concentration of 2%, the container is placed in an ultrasonic tank, and the nano-alumina is coupled Coupling and ultrasonic dispersion, the ultrasonic frequency is 18KHz, and the ultrasonic time is 30 minutes; the above-mentioned coupl...

Embodiment 2

[0058] The polytetrafluoroethylene composite material of this embodiment is composed of the following components in mass percentage: 5% KH-570 modified nano-alumina, 4% molybdenum disulfide, and 91% polytetrafluoroethylene.

[0059] The polytetrafluoroethylene composite cage for bearings in this embodiment is composed of the following components in mass percentage: 5% KH-570 modified nano-alumina, 4% molybdenum disulfide, and 91% polytetrafluoroethylene.

[0060] The preparation method of the polytetrafluoroethylene composite cage for the bearing of the present embodiment comprises the following steps:

[0061] 1) Nano-alumina is placed in the container of the absolute ethanol solution of silane coupling agent KH-570 with a mass concentration of 2%, the container is placed in an ultrasonic tank, and the nano-alumina is coupled Coupling and ultrasonic dispersion, the ultrasonic frequency is 18KHz, and the ultrasonic time is 28 minutes; the above-mentioned coupled and ultrasonic...

Embodiment 3

[0069] The polytetrafluoroethylene composite material of this embodiment is composed of the following components in mass percentage: 8% KH-570 modified nano-alumina, 2% molybdenum disulfide, and 90% polytetrafluoroethylene.

[0070] The polytetrafluoroethylene composite cage for bearings in this embodiment is composed of the following components in mass percentage: 8% KH-570 modified nano-alumina, 2% molybdenum disulfide, and 90% polytetrafluoroethylene.

[0071] The preparation method of the polytetrafluoroethylene composite cage for the bearing of the present embodiment comprises the following steps:

[0072] 1) Nano-alumina is placed in the container of the absolute ethanol solution of silane coupling agent KH-570 with a mass concentration of 2%, the container is placed in an ultrasonic tank, and the nano-alumina is coupled Coupling and ultrasonic dispersion, the ultrasonic frequency is 22KHz, and the ultrasonic time is 20 minutes; the above-mentioned coupled and ultrasonical...

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Abstract

The invention discloses a polytetrafluoroethylene composite, a polytetrafluoroethylene composite holder for a bearing and a preparation method of the polytetrafluoroethylene composite holder for the bearing. The polytetrafluoroethylene composite is prepared from, by mass, 3%-8% of coupling agent modified nano aluminum oxide, 2%-5% of molybdenum disulfide and 90%-95% of polytetrafluoroethylene. The polytetrafluoroethylene composite is prepared by compounding polytetrafluoroethylene, coupling agent modified nano aluminum oxide and molybdenum disulfide. Nano aluminum oxide is large in heat conductivity and small in grain size, the crushing resistance, heat conductivity and wear resistance of the composite can be remarkably improved, the material surface activity can be improved after nano aluminum oxide is modified with a coupling agent, and surface binding force is increased. The friction and wear resistance of the composite can be enhanced through molybdenum disulfide; the composite has excellent self-lubricating performance and high tensile strength, crushing resistance, heat conductivity and friction and wear resistance are obviously improved, and the requirement of the ultralow-temperature high-speed bearing on the holder is met.

Description

technical field [0001] The invention belongs to the technical field of polymer composite material manufacturing, and in particular relates to a polytetrafluoroethylene composite material, a polytetrafluoroethylene composite cage for bearings and a preparation method thereof. Background technique [0002] At present, the ultra-low temperature and high-speed bearing cage usually adopts glass fiber modified polytetrafluoroethylene composite material, which has the advantages of good wear resistance and self-lubricating property. However, with the further improvement of the bearing requirements of the main engine, the existing glass fiber modified PTFE composite material can no longer meet the requirements of the bearing working condition with a dn value greater than 1.5 million, mainly manifested in the sudden increase of bearing noise, friction torque and temperature rise , The steel balls are severely worn, and the cage is deformed and even broken, which seriously affects the...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08K9/06C08K3/22C08K3/30C09K5/14B29C69/02
CPCB29C69/02C08K3/22C08K3/30C08K9/06C08K2003/2227C08K2003/3009C08K2201/003C08K2201/011C09K5/14C08L27/18
Inventor 时连卫王子君孙小波王枫马美玲李建星党永全
Owner LUOYANG BEARING RES INST CO LTD
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