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A polytetrafluoroethylene composite lubricating strip and its application

A technology of polytetrafluoroethylene and polytetrafluoroethylene wax, which is applied in the field of rail transit, can solve problems such as failure to meet lubrication requirements, poor wettability, poor wear resistance, etc., achieve excellent thermal stability, good self-lubrication, and improve mechanical properties performance effect

Active Publication Date: 2022-04-08
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor wettability of single polytetrafluoroethylene with water and lead metal copper, it cannot meet the lubrication requirements in rainy and snowy weather, and its wear resistance is also poor.

Method used

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  • A polytetrafluoroethylene composite lubricating strip and its application
  • A polytetrafluoroethylene composite lubricating strip and its application
  • A polytetrafluoroethylene composite lubricating strip and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The raw material composition of the polytetrafluoroethylene lubricating strip in this embodiment is composed of the following mass percentages: 0.25wt% silica airgel, 1wt% boron nitride, 3wt% polyphenylene ester, and 95.75wt% polytetrafluoroethylene.

[0030] The preparation method is to weigh each powder according to the proportion, then put it into a polytetrafluoroethylene plastic tank, pre-mix it on an ordinary horizontal mixer for 1-2 hours, and mix it evenly to obtain a mixture; then add 500mL of pure ethanol (Concentration 100%) is added to the mixed powder to ensure that the mixed material is fully submerged, then add 1g of silane coupling agent (KH-550) with a mass fraction of 0.2%, stir well and then suction filter, put the powder obtained by suction filtration into Dry in a vacuum drying oven for 12 hours at a drying temperature of 80°C; then put the dried mixed powder into a mold for pressing, keep the pressure at 30MPa, and obtain a green body after holding ...

Embodiment 2

[0032] The mass percentage of the raw material composition of polytetrafluoroethylene lubricating strip in the present embodiment is constituted as: silica airgel 0.25wt%, boron nitride 1wt%, polyphenylene ester 3wt%, polytetrafluoroethylene wax 2wt%, poly Tetrafluoroethylene 93.75wt%.

[0033] The preparation method is the same as in Example 1 except that the proportions of the powders are different.

Embodiment 3

[0035] The mass percent of the raw material composition of polytetrafluoroethylene lubricating strip in the present embodiment is constituted as: silica airgel 0.25wt%, boron nitride 1wt%, polyphenylene ester 3wt%, polytetrafluoroethylene wax 5wt%, polytetrafluoroethylene wax Tetrafluoroethylene 90.75wt%.

[0036] The preparation method is the same as in Example 1 except that the proportions of the powders are different.

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Abstract

The invention discloses a lubricating strip made of polytetrafluoroethylene composite material and its application, wherein the composition of the lubricating strip made of polytetrafluoroethylene composite material is as follows according to mass percentage: silica airgel 0.25-1.25wt%, nitrided Boron 1-5wt%, polyphenylene 3-8wt%, polytetrafluoroethylene wax 2-15wt%, and the balance is polytetrafluoroethylene. After adopting the above formula, due to the reasonable selection of raw materials, and for the first time, it is proposed to add boron nitride, polyphenylene ester, and polytetrafluoroethylene wax into the formula at the same time, so that it can be used without reducing the wear resistance. Under this condition, the lubricity is greatly improved, and at the same time, due to the composite reinforcement of each component, the composite material exhibits very excellent mechanical properties and prolongs the service life. The polytetrafluoroethylene lubricated composite sliding strip of the invention is mainly used for the lubrication between the copper-based pantograph sliding plate and the contact wire.

Description

technical field [0001] The invention relates to a polymer composite material, in particular to a polytetrafluoroethylene composite lubricating strip and its application, which belongs to the polymer composite lubricating material and is used in the field of rail transportation. Background technique [0002] The pantograph slide is an important current-collecting component for rail transit electric locomotives to obtain power sources. It is installed on the uppermost part of the pantograph and directly contacts the catenary wires. When the skateboard is stationary or sliding, it draws current from the catenary wire to supply power to the locomotive. The powder metallurgy sliding plate has shown great advantages in reducing pantograph-catenary accidents, maintenance workload and operating costs, and has played a positive role in the development of electric locomotives in my country. However, there are also some problems that need to be perfected and solved in the application ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/18C09D7/61C09D7/65
CPCC09D127/18C09D7/61C09D7/70C09D7/65C08L2205/025C08L2205/03C08L2201/08C08K2003/385C08L27/18C08L67/00C08K7/26C08K3/38
Inventor 蒋阳黄建祥李梦江科汪漫李姚传陈童国童国庆
Owner HEFEI UNIV OF TECH