Sealing grease for main bearing of shield machine

A technology of sealing grease and main bearing, applied in the field of sealing grease, can solve the problems of reduced product consistency, lack of pressure-holding seal of the cutter head bearing, and far different performance, achieving good pumping performance and low temperature performance, ensuring lubrication and The effect of sealing performance, excellent anti-watering performance

Inactive Publication Date: 2016-12-07
天津盾构科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the tunneling equipment shield machines are all imported from Europe, America, Japan and other countries in the early stage, and the seal grease of the main bearing of the shield machine is also monopolized by companies such as CONDAT, TOTAL, BASF in France and Matsumura in Japan, so the main bearing of the shield machine is used Sealing grease must rely on imports and is expensive
[0003] In recent years, domestic companies have also begun to research and develop the seal grease for the main bearing of the shield machine, but the products developed are not ideal in use, and may even damage the equipment, which is far from the performance of foreign products. The main problem is: the selection of raw materials is not enough. If it is reas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1:

[0015] The preparation method of the main bearing sealing grease of the shield machine adopts the following steps:

[0016] First, 17kg of type II base oil and 9kg of degradable corn fiber are put into a kneader at room temperature and kneaded for 25 minutes; then 7kg of polyisobutylene, 8kg of polymethacrylate, 9kg of lanolin, and niobium diselenide Put 13kg, 7kg of tantalum diselenide, and 7kg of niobium powder into the kneader to continue kneading. The kneading time is 75 minutes; finally, 7kg of magnesium hydroxide and 5kg of barium petroleum sulfonate are sequentially put into the kneader to continue kneading. The kneading time is 2.5 hours. The sealing grease for the main bearing of the shield machine is obtained.

Example Embodiment

[0017] Example 2:

[0018] The preparation method of the main bearing sealing grease of the shield machine adopts the following steps:

[0019] First, 14kg of type III base oil, 3kg of degradable bamboo fiber and 3kg of polycaprolactone (PCL) fiber are put into a kneader at room temperature for kneading, and the kneading time is 20 minutes; then the viscosity index of 11kg star olefin copolymer is improved in turn Add LHT7016, 4kg glycerin and 25kg tantalum powder into the kneader to continue kneading. The kneading time is 60 minutes; finally, 5kg of ammonium chloride and 3kg of T743 oxidized petroleum fat barium soap rust inhibitor are sequentially put into the kneader to continue kneading. The kneading time is After 2 hours, the main bearing sealing grease of the shield machine is obtained.

[0020] The detection index of the sealing grease of the main bearing of the tunnel boring engineering equipment shield machine of the present invention is:

[0021] The main bearing sealing gr...

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PUM

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Abstract

The invention belongs to the technical field of sealing grease, and particularly relates to sealing grease for a main bearing of a shield machine. The sealing grease is prepared from the following components in parts by weight: 14-20 parts of base oil, 6-12 parts of degradable fibers, 11-20 parts of a pasty adhesive, 4-15 parts of a structural stabilizing agent, 25-30 parts of an oiliness agent and a friction improver, 5-10 parts of a fire retardant and 3-8 parts of a rust inhibitor. The sealing grease disclosed by the invention has the beneficial effects of being favorable in stickiness and insoluble in water, so that the sealing grease has excellent flooding resistance, appropriate consistency and favorable lubricating properties; the lubricating and sealing properties of moving parts are guaranteed; a fibrous structure guarantees the head of the shield machine to be free from invasion of impurities, precision parts of bearings and the like are prevented from being abraded, and the sealing grease has favorable pumping performance and low-temperature performance.

Description

technical field [0001] The invention belongs to the technical field of sealing grease, in particular to a sealing grease for the main bearing of a shield machine. Background technique [0002] Tunnel engineering excavation equipment-shield machine is mainly used in urban rail construction, highway and railway, municipal engineering, water conservancy engineering, river and sea tunnels, water (nuclear) power plant diversion projects and military confidential facilities and other fields. During the construction process of the shield machine, there are mud, rocks, sand, water, dregs and other dregs in the cutterhead soil bin, and there is still a certain pressure. In order to prevent mud, rocks, sand, water, dregs and other dregs from entering If the main bearing of the shield machine and the bearing of the screw conveyor cause damage to the rotating parts of the shield machine, the sealing grease for the main bearing of the shield machine must be used. It is a sealing grease s...

Claims

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Application Information

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IPC IPC(8): C10M169/00C10M169/04C10N20/02C10N30/06C10N40/02C10N50/10
Inventor 王守新
Owner 天津盾构科技发展有限公司
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