Lubricating grease composition for water pump bearing of automobile and preparation method thereof

A grease composition and technology for water pump bearings, applied in the field of grease, can solve the problems of rare patents and reports, and no grease for automobile water pump bearings has been found, and achieve good mechanical stability, good sealing effect, and long oxidation induction period. Effect

Inactive Publication Date: 2015-03-25
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] There are many types of lubricating greases used in bearings in the domestic market, and there is a situation that lubricating greases are used in multi-industry bearings. There is no lubricating grease specially used in automotive water pump bearings, and there are few related patents and reports

Method used

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  • Lubricating grease composition for water pump bearing of automobile and preparation method thereof
  • Lubricating grease composition for water pump bearing of automobile and preparation method thereof

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Embodiment Construction

[0024] The present invention will be further elaborated below by specific examples.

[0025] Embodiment 1-6 and comparative example preparation method:

[0026] First, add 40% to 50% of the total amount of base oil in the specified proportion to the reactor. This part of base oil should not contain ester synthetic oil. If the total formula contains grease oil, it should be added in the subsequent steps, and then add 12 -Hydroxystearic acid, stir and heat up to 85-90°C, add 50% lithium hydroxide lye, react for 1-1.5h, control the temperature within the range of 90-100°C; after the one-step alkali reaction is completed, add At least one of the dibasic acids and at least one of the low-molecular acids are reacted for another 1 to 1.5 hours, then the remaining lithium hydroxide lye is added to the reactor, the temperature is raised to drain water, and the temperature is raised to 200 to 220 within 2 hours. ℃, add 20-25% base oil, after quenching, immediately add antioxidant, 95-1...

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Abstract

The invention provides a lubricating grease composition for a water pump bearing of an automobile and a preparation method thereof. The lubricating grease composition is prepared from the following components in percentage by weight: (1) 5-18% of a thickening agent which is compound lithium soap; (2) 75-90% of base oil; and (3) 2-7% of an additive which comprises (a) 1-2.5% of an amine antioxidant; (b) 1-3% of an organic sulfide and / or organic phosphide antiwear agent; and (c) 0.5-2% of a triazole and / or tetrahydroglyoxaline antirust agent. The lubricating grease produced by the composition has a relatively high dropping point and good mechanical stability, thereby facilitating use of the lubricating grease under a high-temperature environment while ensuring non-drainage so as to play a good sealing effect. The composition has good wear-resisting and carrying capacities. Through an experiment on a four-ball method wear tester, the maximum non-seizure load PB and the sintering load PD are relatively high, and wear of the lubricated part can be effectively reduced. Meanwhile, the service life of the bearing is long-acting. The composition is suitable for being used on the water pump bearing of the automobile.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, in particular to an automobile water pump bearing lubricating grease composition and a preparation method thereof. Background technique [0002] Grease belongs to the category of lubricants. It is composed of many different components. Each component endows the grease with different characteristics, and the proportion of each component and the manufacturing process have a direct impact on the performance of the grease, especially the appearance. Now Most of the lubricating grease is a yellow-brown uniform ointment. [0003] Automobile engine water pump bearing is a special bearing unit composed of a shaft and an inner ring. Due to the high speed of the water pump, the speed of the general water pump can reach 6000r / min, and the speed of the high-speed water pump can reach 9000r / min, so the bearing is required It has a high bearing capacity, so as to meet the life requirements of the p...

Claims

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Application Information

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IPC IPC(8): C10M169/06C10M169/00C10M177/00C10N50/10
Inventor 谷红宽刘亚春刘建龙高艳青
Owner CHINA PETROLEUM & CHEM CORP
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