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Novel tunnel shield machine main bearing sealing material

A sealing material and shield machine technology, applied in the petroleum industry, lubricating compositions, etc., can solve the problem of not being able to directly play a waterproof role, and achieve the effect of improving waterproof performance, increasing volume and mechanical performance

Inactive Publication Date: 2015-12-23
东莞市明洁隧道建设材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a sealing material for the main bearing of the tunnel boring shield machine to solve the problem that the previous materials cannot directly play a waterproof role

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0010] A method for preparing a sealing material for a main bearing of a tunnel shield machine, the steps of which are:

[0011] First, heat the base oil to about 80°C in the heating kettle, then add the tackifier into the heating kettle under stirring conditions and keep the temperature until the base oil and tackifier are completely mixed evenly, and then cool down to about 30°C;

[0012] Then, the cooled mixture is transferred to a grease kneader, and materials such as powdery filler, grease and anti-extrusion agent are sequentially added to the grease kneader under stirring and kneaded until uniform;

[0013] After that, add natural degradable fiber and knead and stir for 1-3 hours;

[0014] Finally, add other auxiliary materials and stir well.

Embodiment l

[0016] First, add 200kg32# mechanical hydraulic oil into the heating kettle, heat up to about 80°C while stirring, then add 30kg of tackifier (m(PB2400):m(5T)=l:4), continue stirring and kneading l ~ 4h after mixing evenly, cool down to 40 ℃. The lubricating oil that mixes homogeneously and viscosifying agent are transferred in the grease kneader afterwards, and 100kg oil product anti-extrusion agent chlorinated paraffin-42, 50kg2# lithium base fat, 565kg light calcium carbonate (add in batches 5: 3:2) Under the condition of stirring, add it into the oil kneader and knead until uniform; finally add 35kg of degradable wood fiber, 5kg of preservative and 15kg of anatase titanium dioxide, knead and stir at constant temperature for 1 ~ 3 hours, and then the main bearing can be obtained. Sealing material one.

Embodiment 2

[0018] First, add 220kg of 46# mechanical hydraulic oil into the heating kettle, raise the temperature to about 80°C while stirring, then add 50kg of tackifier (m(C5):m(rosin derivative)=2:3), and continue stirring After kneading for about 1-4 hours and mixing evenly, cool down to 40°C. Afterwards, the lubricating oil and viscosifier mixed uniformly are transferred in the grease kneader, and the oil product anti-extrusion agent chlorinated paraffin-52, 50kg complex soap base fat, heavy calcium carbonate 550kg (add 550kg in batches) of 75kg :3:2) Under stirring conditions, add it into the oil kneader and knead until uniform; finally add 35kg of degradable wood fiber, 5kg of preservatives and 15kg of anatase titanium dioxide, knead and stir at constant temperature for 1-3 hours, and you can get the final product Bearing seal material II.

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Abstract

The invention discloses a novel tunnel shield machine main bearing sealing material, which comprises the following components: 27-59% of basic grease, 5%-10% of lubricating grease, 5-20% of a tackifier, 20%-60% of powder filler, 1%-5% of natural degradable fiber, 0.5%-5% of a water absorption material particle, 1-10% of an anti-extrusion agent, and the balance other auxiliary materials. The water absorption material particle involved in the invention includes one of the following raw materials: 1) a cross-linked sodium polyacrylate salt; 2) a cross-linked potassium polyacrylate salt; 3) a crosslinked sodium polymethacrylate salt; 4) a crosslinked potassium polymethacrylate salt; and 5) other high polymer materials with similar structure and properties. The material can absorb a large amount of water when encountering water so as to play multiple roles that: 1) it can serve as normal powder, 2) it can absorb water directly so as to play a waterproof role, 3) the volume increases after water absorption so as to further enhance the material volume and mechanical properties, thereby improving the waterproof performance, and 4) after expansion, the material can block permeable holes and gaps.

Description

Technical field: [0001] The invention relates to the technical field of main bearing sealing materials, in particular to a main bearing sealing material of a shield machine. Background technique: [0002] In the 21st century, the development of urban underground space in our country will have a broad market for utilization. In the 10 years from 2014 to 2024, more than 30 cities in my country will build subways, and the total mileage will reach at least 1,000 kilometers. The use of shield tunneling machines for construction will be an inevitable choice. At present, it is estimated that there are about 200 shield tunneling machines in my country. By 2015, it is estimated that there will be more than 500 units. [0003] Tunnel boring machine (shield machine) is the main equipment of modern tunnel boring. Sealing grease for the main bearing of the shield machine is the main material for sealing and protecting the main bearing of the shield machine in the construction of the s...

Claims

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Application Information

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IPC IPC(8): C10M169/00C10N40/02C10N40/34
Inventor 尹玉岭李纪晖
Owner 东莞市明洁隧道建设材料有限公司
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