Running-in method for reducing friction coefficient between metal friction pairs

A technology of friction coefficient and friction pair, which is applied in the direction of lubricating composition, engine lubrication, additives, etc., can solve the problems of reducing the service life of metal friction pairs, rusting of metal friction pairs, cumbersome operation, etc., and achieves short running-in time and ultra-low Friction coefficient, easy operation effect

Active Publication Date: 2018-03-27
QILU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The running-in process is divided into three processes: rapid pre-running, accelerated running-in, and overloaded running-in. The applied load needs to be changed, the process is complicated, and the operation is cumbersome; in addition, the water lubricating fluid will cause corrosion of the metal friction pair, which will accelerate wear and reduce the wear of the metal friction pair. service life, so the invention is suitable for non-metallic friction pairs such as cemented carbide and ceramics, but not for metal friction pairs

Method used

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  • Running-in method for reducing friction coefficient between metal friction pairs
  • Running-in method for reducing friction coefficient between metal friction pairs
  • Running-in method for reducing friction coefficient between metal friction pairs

Examples

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Effect test

Embodiment 1

[0028] Embodiment 1, a kind of running-in method that reduces the friction coefficient between metal friction pairs, the steps are as follows:

[0029] Step 1: Clean and dry the friction surface of the metal friction pair with alcohol and acetone respectively to remove the residue on the friction surface; apply 50 μL acetylacetone on the friction surface, and pre-run for 120 seconds. Due to the consumption of acetyl acetone, replenish during the pre-run Three times of acetylacetone to avoid a dry friction state, each replenishment volume is 50 μL; clean the friction surface after pre-running, the surface residues that have not been removed during washing and the reaction products of acetylacetone and the friction surface;

[0030] Step 2: Apply 50 μL of acetylacetone to the friction surface after pre-running, and run for 120 seconds. Due to the consumption of acetylacetone, acetylacetone was supplemented three times (50 μL each time) to avoid dry friction. to 50 μL, then unloa...

Embodiment 2

[0038] As described in Example 1, the difference is: Step 3: Apply 25 μL of SAE 10W-40 engine oil between the friction pairs after running-in, so that the friction pairs are in a fully lubricated state.

[0039] Start the main engine, the friction pair starts to work, and the friction coefficient after stabilization is 0.052, such as figure 2 (b) shown in the curve. As a comparison, the friction coefficient of the friction pair without running-in by this method is 0.101 under the same conditions, such as figure 2 (a) shown in the curve.

Embodiment 3

[0041] As described in Example 1, the difference is: 25 μL of hexylbiphenylcyanide liquid crystal is used as the lubricant in step 3.

[0042] Start the main engine, the friction pair starts to work, and the friction coefficient after stabilization is 0.021; as a comparison, the friction coefficient of the friction pair that has not been run-in by this method is 0.060 under the same conditions.

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Abstract

The invention relates to a running-in method for reducing the friction coefficient between metal friction pairs. The method adopts an acetylacetone or acetylacetone alcoholic solution as a running-inagent, the two stages of pre-running-in and running-in are included, and the total running-in time is 60-480 seconds. The method is easy to implement and high in practicability, and can greatly reducethe friction coefficient between the metal friction pairs without a special device.

Description

technical field [0001] The invention relates to a running-in method for reducing the friction coefficient between metal friction pairs, and belongs to the technical field of running-in lubrication. Background technique [0002] According to statistics, 28% and 26% of the fuel energy of passenger cars and freight trucks are respectively consumed by the friction of the engine, transmission system and automobile tires, excluding the energy consumed by braking. 1 / 3 of the world's primary energy is consumed due to friction, and about 80% of mechanical parts fail due to wear. In our country, the loss caused by friction and wear accounts for 4.5% of our country's gross national product every year. Using the correct lubrication method can improve the friction state between mechanical parts, thereby reducing the friction coefficient, slowing down wear, and realizing energy saving, consumption reduction and emission reduction, which can not only achieve obvious social and economic be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16N15/00C10M129/24G01N19/02C10N30/06C10N30/10
CPCC10M129/24C10M2207/08C10M2215/16C10N2030/06C10N2030/10F16N15/00F16N2210/04G01N19/02
Inventor 许崇海陈辉陈照强肖光春衣明东盛长超
Owner QILU UNIV OF TECH
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