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Consistent grease for meter, gear and driving screw of airplane

A technology of aircraft instruments and transmission screws, which is applied in the field of lubricating grease, can solve the problems of low efficiency, complicated process, unsatisfactory low temperature performance of lubricating grease and rubber compatibility, etc.

Active Publication Date: 2009-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lubricating grease is used in the temperature range of -60 ~ 120 ℃, has good wear resistance and low volatility, but the low temperature performance and rubber compatibility of the lubricating grease cannot meet the general lubrication requirements of aircraft
In addition, if the acid-base saponification reaction is carried out in the ester oil, the ester oil will be hydrolyzed. Therefore, when using the ester oil to prepare lithium-based grease, a prefabricated soap process must be used, which is complicated and inefficient.

Method used

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  • Consistent grease for meter, gear and driving screw of airplane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a 100L atmospheric pressure kettle, add 30 kg of 100°C kinematic viscosity 4mm 2 / s of GTL base oil and 5 kg of lauryl hydroxystearic acid, heat and stir, the temperature rises to 87 ° C, add 0.7 kg of lithium hydroxide monohydrate aqueous solution, wherein the weight of water is 3.5 kg, saponification and dehydration, and heat up to 215 ℃, stop heating, add 15 kg of the same base oil as quenching oil. The temperature is lowered to 140°C, and the pressure is cut at 0.8 MPa for 30 minutes. When the temperature drops to 100°C, 1.5 kg of tricresyl phosphate, 0.15 kg of alkylated diphenylamine (liquid), and 0.05 kg of benzene Paratriazole and 1.0 kg of calcium lanolin, mixed evenly. Table 1 lists the viscosity of 4mm at 100°C 2 The physical and chemical performance indicators of GTL synthetic oil per s. The physical and chemical properties of the product are shown in Table 2.

Embodiment 2

[0024] In a 100L atmospheric pressure kettle, add 20 kg 2 / s of GTL base oil and 3 kg of lauryl hydroxystearic acid, heat and stir, the temperature rises to 82 ° C, add 0.44 kg of lithium hydroxide monohydrate aqueous solution, wherein the weight of water is 2.0 kg, heat up and stir, wait for water vapor After the volatilization is completed, the temperature in the kettle rises to 130°C, and 10 kg of the same base oil is added, and the temperature is raised to 200°C with continuous stirring, and the heating is stopped, and 15 kg of 100°C kinematic viscosity 8mm is added. 2 / s GTL base oil as quenching oil. The temperature is lowered to 130°C, and the pressure is cyclically sheared at 0.6MPa for 40 minutes. When the temperature drops to 90°C, 0.5 kg of tricresyl phosphate, 0.1 kg of alkylated diphenylamine (liquid), and 0.03 kg of benzene Paratriazole and 0.5 kg of lanolin calcium, mix well. The physical and chemical properties of the product are shown in Table 2.

Embodiment 3

[0026] In a 100L atmospheric pressure kettle, add 20 kg 2 / s of GTL base oil and 7.5 kg of lauryl hydroxystearic acid, heat and stir, the temperature rises to 90 ° C, add 1.05 kg of lithium hydroxide monohydrate aqueous solution, wherein the weight of water is 5.0 kg, heat up and stir, and wait for the water vapor After the volatilization is complete, the temperature in the kettle rises to 150°C and adds 10 kg of 100°C kinematic viscosity of 6mm 2 / s GTL base oil, continue to stir and heat up to 220°C, stop heating, add 15 kg of 100°C kinematic viscosity 6mm 2 / s GTL base oil as quenching oil. The temperature is lowered to 150°C, and the pressure is cyclically sheared at 0.5MPa for 50 minutes. When the temperature drops to 120°C, 1.8 kg of tricresyl phosphate, 0.7 kg of alkylated diphenylamine (liquid), and 0.08 kg of benzene Paratriazole and 1.5 kg of barium petroleum sulfonate, mixed evenly. The physical and chemical properties of the product are shown in Table 2.

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Abstract

The invention relates to lubricating grease for aircraft instruments, gears and drive screws, which comprises the following compositions based on the total weight of the lubricating grease: (a) 3 to 20 weight percent of lithium soap thickening agent; (b) 0.1 to 5.0 weight percent of phosphate ester; (c) 0.01 to 3.0 weight percent of antioxidant; (d) 0.1 to 5.0 weight percent of composite antirust agent; and (e) the balance being GTL syntholube basic oil. The lubricating grease has superior high and low temperature performance, oxidation stability, low votatility, colloid stability, mechanical stability, extreme pressure antiwear property and compatibility with rubber seal, and is suitable for general lubrication of the aircraft instruments, the gears and the drive screws at a temperature of between 73 DEG C below zero and 120 DEG C.

Description

technical field [0001] The present invention relates to a lubricant, more particularly to a grease. Background technique [0002] According to the lubrication requirements of aircraft instruments, gears, transmission screws and other components, a series of grease varieties have been developed at home and abroad to meet the lubrication requirements of aircraft components, but due to the variety of varieties, it brings troubles to purchase, storage and use. Moreover, the probability of wrong use is increased. Therefore, the requirements for simplifying varieties and developing general-purpose greases are becoming stronger and stronger. With the improvement of aircraft performance, the lubrication requirements of aircraft instruments, gears and transmission screws have also increased accordingly. The aircraft flies at an altitude of 10,000 meters, and the ambient temperature is low. In order to meet a wide operating temperature range, such as -73 to 120°C, the grease is requi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M159/04C10M117/00C10M133/12C10M133/44C10M137/04C10N30/10C10N30/12C10N40/04C10N40/06
Inventor 李茂森方春梅王红孙洪伟刘显秋姜靓张建荣段庆华
Owner CHINA PETROLEUM & CHEM CORP
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