Unlock instant, AI-driven research and patent intelligence for your innovation.

Airplane wheel grease and its preparing method

A technology of lubricating grease and wheel, used in lubricating compositions, petroleum industry, base materials, etc., can solve the problems of poor high and low temperature, and achieve the effect of wide operating temperature range and good mechanical stability

Active Publication Date: 2006-01-04
CHINA PETROLEUM & CHEM CORP +1
View PDF4 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The grease has good mechanical stability, colloidal stability, extreme pressure performance, oxidation stability, rust resistance and compatibility with rubber seals, but the high and low temperature performance of the grease is poor. The hourly evaporation loss is greater than 3%, and the similar viscosity at low temperature -40°C is about 1800Pa.s

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] In a 20L autoclave, add 5200 grams of polyalphaolefin oil and 840 grams of lauryl hydroxystearic acid, 800 ml of water, heat, the temperature rises to 75 ° C, add 11.4 grams of calcium hydroxide, after 10 minutes of reaction, add 280 grams of decane Diacid and 230 grams of lithium hydroxide, sealed, heated to a pressure of 0.3 MPa, constant pressure for 1 hour, pressure relief, heating to 210 ° C, adding quenching oil, quenching oil is 310 grams of polyalphaolefin oil and 2000 grams of ethyl silicone oil , the temperature was lowered to 150° C., and the base grease was obtained by shearing with a pressure of 0.6 MPa for 30 minutes. 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

[0027] In a 20L autoclave, add 4641 grams of polyalphaolefin oil and 1383 grams of lauryl hydroxystearic acid, 1000 ml of water, heat, the temperature rises to 75 ° C, add 37.5 grams of calcium hydroxide, after 10 minutes of reaction, add 461 grams of decane Diacid and 355 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 quenching oil, quenching oil is 900 grams of polyalphaolefin oil and 1000 grams of ethyl silicone oil , the temperature was lowered to 150° C., and the base grease was obtained by shearing with a pressure of 0.6 MPa for 30 minutes. Add 1500 grams of graphite powder, 100 grams of di-n-butyl phosphite, 10 grams of diphenylamine, and 5 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 3

[0029] According to the composition and technology of example 1, the quench oil is 2310 grams of ethyl silicone oil, and the physical and chemical properties of the product are shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The airplane wheel grease consists of ethyl silicone oil as base oil 5-45 wt%, composite lithium and calcium soap thickener 3-25 wt%, graphite powder additive 2-20 wt%, phosphate ester additive 0.1-5.0 wt%, aromatic amine antioxidant additive 0.01-3.0 wt%, benzotriazole aliphatic amine as antirust additive 0.01-3.0 wt% and polyalpha olefin oil as base oil in the rest amount. Owing to adopting both ethyl silicone oil and polyalpha olefin oil as base oil, the grease has wide use temperature range as well as excellent mechanical stability, colloid stability, extreme pressure performance, oxidation stability, and antirust performance, and may meet the wide temperature range requirement of lubricating airplane wheels.

Description

technical field [0001] This invention relates to a lubricant, and more particularly to a grease for aircraft wheels. technical background [0002] In order to meet the requirements of long-term safe flight of the aircraft, the wheel grease must have good mechanical stability, colloidal stability, oxidation stability, rust resistance and compatibility with rubber seals. At the same time, the aircraft is in an extremely low temperature environment at high altitude, and when the aircraft is landing, the wheels are subjected to extreme pressure and high temperature. Therefore, the wheel grease must have good extreme pressure and high and low temperature properties. [0003] For example, the САПФИР lubricating grease conforming to the specification of TY 38.1011051-87 uses complex calcium thickened synthetic ester oil, and adds graphite powder and phosphate ester. САПФИР grease has good high temperature performance, high temperature 150 ° C, 5h evaporation loss is 2% Good colloi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C10M107/50C10M137/04
Inventor 李茂森王平王金凤刘显秋雒士军
Owner CHINA PETROLEUM & CHEM CORP