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Shield machine main bearing sealing grease and preparation method thereof

A technology for sealing grease and main bearings, applied in the petroleum industry, lubricating compositions, etc., can solve the problems of extended construction period, loss of construction enterprises, damaged main bearings, etc., and achieves improved water erosion resistance, improved anti-emulsification, and good anti-emulsification sexual effect

Active Publication Date: 2018-01-09
GUANGZHOU AORUN SYNTHETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the seal of the main bearing fails, impurities such as sediment during construction will directly contact the main bearing, which will affect the operation of the main bearing, increase the risk of shield construction, and affect the construction effect. In severe cases, the main bearing will be damaged. Even directly cause the shield machine to stop
Moreover, due to the limitation of external conditions, it is very difficult to repair the main bearing of the shield machine underground
This will increase the difficulty of construction, prolong the construction period, increase the cost, and bring huge losses to the construction company.

Method used

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  • Shield machine main bearing sealing grease and preparation method thereof
  • Shield machine main bearing sealing grease and preparation method thereof
  • Shield machine main bearing sealing grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A shield machine main bearing sealing grease, its components and mass percentages are as follows:

[0022]

[0023] Preparation method: according to the above mass percentage, the oil-soluble nano-CeO 2 Add it into castor oil, stir for 1 hour at room temperature, then add niobium powder, No. 3 general-purpose lithium base grease, polyisobutylene, imidazoline, stir for 2 hours, then add cotton fiber material, stir for 2 hours, then add light calcium carbonate, and continue stirring 1h is enough.

Embodiment 2

[0025] A shield machine main bearing sealing grease, its components and mass percentages are as follows:

[0026]

[0027] Preparation method: according to the above mass percentage, the oil-soluble nano-CeO 2 Add to peanut oil, stir for 1.5h, then add molybdenum disulfide, tallow, polyisobutylene, polyacrylamide, trialkyl phosphate, stir for 2.5h, then add bamboo fiber material, stir for 2.5h, then add bentonite, continue stirring 1.5h is enough.

Embodiment 3

[0029] A shield machine main bearing sealing grease, its components and mass percentages are as follows:

[0030]

[0031]

[0032] Preparation method: According to the above mass percentage, the oil-soluble nano-La 2 o 3 Add to soybean oil, stir for 2 hours, then add graphite, titanium-based grease, complex calcium sulfonate-based grease, ethylene propylene copolymer, 2,4,6-trimercapto-1,3,5-triazine, and stir for 3 hours , then add sepiolite fiber, stir for 3h, then add talcum powder, and continue stirring for 2h.

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Abstract

The invention provides a shield machine main bearing sealing grease, which comprises, by mass, 4-10% of base oil, 2-6% of a fiber material, 2-7% of a solid lubricant, 14-20% of lubricating grease, 15-24% of a tackifier, 4-8% of a corrosion inhibitor, 40-50% of a powdered filler, and 0.5-3% of a nanometer rare earth oxide. The invention further provides a preparation method of the sealing grease. Compared to the existing shield machine main bearing sealing grease, the shield machine main bearing sealing grease prepared by using the formula of the present invention has good emulsification resistance, good wear resistance and good sealing property, wherein the wear resistance is excellent, the minimum diameter of the wear spot under ASTM D4172 standard is 0.49, and the emulsification resistance of the sealing grease is improved so as to easily improve the water rinsing resistance of the sealing grease of the present invention, such that the sealing grease has good sealing property.

Description

technical field [0001] The invention relates to a sealing grease and a preparation method thereof. In particular, it relates to a main bearing sealing grease of a shield machine and a preparation method thereof. technical background [0002] The shield machine refers to the construction machinery for underground engineering operations in soft soil and soft rock formations. Because its construction is not affected by natural conditions and has a high degree of mechanization and automation, it is widely used in subways, railways, highways, municipalities, and hydropower. Wait for the tunnel project. The main bearing of the shield machine is the core part of the whole shield machine, which plays the role of supporting the shield cutter head, and its reliability affects the quality and safety of the shield machine construction. During the working process of the shield machine, the cutter head operates in the environment of sand, rocks, water, and dust, and at the same time, it...

Claims

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Application Information

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IPC IPC(8): C10M169/00C10N30/06C10N40/02
Inventor 蔡海华李惠明李小潞蔡敏岳
Owner GUANGZHOU AORUN SYNTHETIC MATERIAL
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