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Shield machine main bearing sealing grease and preparation method thereof

A technology for sealing grease and main bearings, which is applied in the field of sealing grease, and can solve the problem that water resistance and pumpability cannot be taken into account at the same time, water resistance and pumpability need to be improved, and the gap between anti-friction and anti-wear performance and lubricity and other problems, to achieve good water resistance and pumpability, excellent anti-friction and anti-wear performance, and outstanding lubricating effect

Inactive Publication Date: 2017-06-06
XIAMEN NORNS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the sealing grease of the main bearing of the shield machine mainly relies on imports, but the production cost and transportation cost abroad are relatively high. There is still a certain gap. In addition, the water resistance and pumpability also need to be improved.
Especially when the construction environment temperature of shield tunneling is low, water resistance and pumpability cannot be taken into account at the same time, and the lubricity is poor, which is easy to cause wear to the rotating cylinder, affecting normal excavation and causing serious economic losses

Method used

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  • Shield machine main bearing sealing grease and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0022] The shield machine main bearing sealing grease in the present embodiment has the following components and mass percentages: 18% of 32# mechanical hydraulic oil; 25% calcium base grease; 15% polyisobutylene; 2% NDZ-105 (titanate coupling agent); 35% nano-graphite; 5% wood fiber, the length of which is 0.5-6mm.

[0023] Preparation method: put 32# mechanical hydraulic oil, calcium base grease, polyisobutylene, and NDZ-105 into the kneader in turn, stir and knead for 0.5-1h; In the machine, stir for 0.5h; finally put in wood fiber, stir and knead for 1-2h.

Embodiment 2

[0025] The main bearing sealing grease of the shield machine in the present embodiment has the following components and mass percentages: 15% mineral oil; 30% lithium-based grease; 12% polypropylene alcohol; 5% OL-AT1618 (aluminum-titanium composite coupling agent ); 30% nano-graphite; 8% flax fiber, the length of which is 0.5-6mm.

[0026] Preparation method: put mineral oil, lithium base grease, polypropylene alcohol, OL-AT1618 into the kneader in turn, stir and knead for 0.5-1h; then put nano-graphite into the kneader in batches according to the ratio of 5:3:2 , Stir for 1h; finally put in flax fiber, stir and knead for 1-2h.

Embodiment 3

[0028] The main bearing sealing grease of the shield machine in this embodiment has the following components and mass percentages: 28% corn oil; 20% extreme pressure lithium-based grease; 20% polyisobutylene; 2% OLAT-1618; 25% nano disulfide Molybdenum; 5% flax fiber, the length of which is 0.5-6mm.

[0029] Preparation method: put corn oil, extreme pressure lithium base grease, polyisobutylene, OL-AT1618 into the kneader in turn, stir and knead for 0.5-1h; then put nano molybdenum disulfide into the In the kneader, stir for 1 hour; finally put flax fiber in, stir and knead for 1-2 hours.

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Abstract

The invention relates to shield machine main bearing sealing grease and a preparation method thereof. The main bearing sealing grease is prepared from the ingredients in mass percent: 15 to 30% of base oil, 20 to 30% of lubricating grease, 12 to 20% of tackifier, 5 to 12% of degradable fiber, 20 to 40% of nanoparticle filling material and 1 to 5% of dispersing agent. The shield machine main bearing sealing grease prepared according the formula has excellent antifriction and anti-wear performance and an outstanding lubricating effect, can effectively prevent a rotating portion from being rusted and reduces abrasion of the rotating portion. In addition, the shield machine main bearing sealing grease has good water-resistant leakproofness and pumpability, prevents pipelines from being plugged, can more effectively prevent impurities from invading a shield head portion and damaging precise components of bearings and the like due to a fiber structure, prolongs service life of a main bearing and has stable product performance, no toxin and corrosion, environmental friendliness and a simple preparation technology.

Description

technical field [0001] The invention relates to a sealing grease, in particular to a main bearing sealing grease used for a shield machine and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's transportation industry, in order to meet the needs of urban construction and development, underground projects have been increasingly built. At present, the shield construction method has been widely used and promoted in the fields of urban rail construction, highway and railway, municipal engineering, water conservancy projects, river and sea tunnels, and military confidential facilities. In the future, the shield construction method will become the mainstream of tunnel construction. During the construction process of the shield machine, the cutterhead cuts the soil to excavate the tunnel. There is a rotating body between the cutterhead and the main drive. Water, foam, and bentonite can be injected into the cutterh...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N30/06C10N40/02C10N50/10
CPCC10M169/048C10M2201/041C10M2201/065C10M2201/066C10M2205/022C10M2205/024C10M2205/026C10M2207/401C10M2209/04C10M2209/12C10M2217/024C10M2227/06C10M2227/065C10N2030/06C10N2040/02C10N2040/34C10N2050/10
Inventor 郭亚莹黄碧珠
Owner XIAMEN NORNS TECH
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