Lubricating grease for wheels of airplanes and its preparing method

A technology of lubricating grease and machine wheels, which is applied in the direction of lubricating compositions, base materials, additives, etc., can solve the problems of poor mechanical stability and colloidal stability, and achieve good mechanical stability, good high and low temperature performance, and satisfy the lubrication effect

Inactive Publication Date: 2003-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grease has good high and low temperature properties, extreme pressure and compatibility with rubber seals, but poor mechanical stability and colloidal stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] In a 20L autoclave, add 5590 grams of polyalphaolefin oil and 1105 grams of lauryl hydroxystearic acid, 1000 ml of water, heat, the temperature rises to 75 ° C, add 29.9 grams of calcium hydroxide, after 10 minutes of reaction, add 294 grams of decane Diacid and 254 grams of lithium hydroxide, sealed, heated to a pressure of 0.3MPa, constant pressure for 1 hour, pressure relief, heating up to 210 ° C, adding 3010 grams of polyalphaolefin oil, cooling down to 150 ° C in circulation, and shearing at a pressure of 0.6 MPa Cut for 30 minutes to get the base fat. Add 1,000 grams of graphite powder, 300 grams of tricresyl phosphate, 50 grams of diisooctyl diphenylamine, and 20 grams of benzotriazole into the base grease, stir evenly, and pack. The physical and chemical properties of the product are shown in Table 1.

example 2

[0024] In a 20L autoclave, add 5980 grams of polyalphaolefin oil, 631 grams of lauryl hydroxystearic acid, 800 ml of water, heat, the temperature rises to 75 ° C, add 17.1 grams of calcium hydroxide, after 10 minutes of reaction, add 169 grams of decane Diacid and 145 grams of lithium hydroxide, sealed, heated to a pressure of 0.3 MPa, constant pressure for 1 hour, pressure relief, heating up to 210 ° C, adding 3220 grams of polyalphaolefin oil, cooling down to 150 ° C in circulation, and shearing at a pressure of 0.6 MPa Cut for 30 minutes to get the base fat. Add 500 grams of graphite powder, 100 grams of tricresyl phosphate, 10 grams of diisooctyl diphenylamine, and 5 grams of benzotriazole into the base grease. The physical and chemical properties of the product are shown in Table 1.

example 3

[0026] Base grease is prepared with example 1, and additive is 1500 gram graphite powders, 400 gram tricresyl phosphates, 100 gram diisooctyl diphenylamine, 100 gram benzotriazoles. The physical and chemical properties of the product are shown in Table 1.

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PUM

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Abstract

A lubricating grease for the wheels of airplane contains composite Li or Ca soap as thickening agent (3-20 wt.%), graphite powder (2-20%), phosphate (0.1-5.0%), arylamine as antioxidizing agent (0.01-3%), phenyltriazole salt of fatty acid as antirust agent (0.01-3.0%), and poly-alpha-olefine oil (rest). Its advantages are better high and low temp nature, high stability, extreme pressure performance and antirust nature, and good compatibility to rubber.

Description

technical field [0001] This invention relates to a lubricant, and more particularly to a grease for aircraft wheels. technical background [0002] The aircraft is in an extremely low temperature environment at high altitude, and when the aircraft is landing, the wheels have to withstand extreme pressure and high temperature. Therefore, the wheel grease must have good high and low temperature properties and extreme pressure properties; According to the requirements of the requirements, the wheel grease should also have good mechanical stability, colloidal stability and compatibility with rubber seals. Existing lubricating greases can often meet the requirements of high and low temperature properties and extreme pressure properties, while other properties are not very ideal. [0003] For example, the CAПΦИP grease conforming to the TY38.1011051-87 specification is made of complex calcium thickened synthetic ester oil, and added with graphite powder and phosphate ester. CAПΦИP...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M107/02C10M137/00
Inventor 李茂森王金凤罗泳涛
Owner CHINA PETROLEUM & CHEM CORP
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