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A special self-repairing biodegradable sealing grease for shield machine main bearing and preparation method thereof

A biodegradable and self-healing technology, applied in lubricating compositions and other directions, can solve problems such as inability to actively respond to changes in the underground environment, harsh and complex underground environments, and achieve excellent pumping performance, tight structure, and not easy to absorb water.

Active Publication Date: 2016-02-24
NATOR LUBRICATION TECH JIANGSU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the underground environment is harsh and complex, and the general grease is passively sealed, which cannot actively respond to changes in the underground environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In embodiment one, the following components are used to prepare the sealant of the present invention, wherein the percentage is based on the total weight of the sealant: the sebacate of 38% by weight is selected as the biodegradable base oil, 5% by weight of guar gum as a biodegradable tackifier, 9% by weight of coniferous wood fiber as a biodegradable thickener, 6% by weight of sodium hydroxymethyl cellulose as a self-repairing stabilizer, 5% by weight of carbon black as an inorganic solid lubricant and 37% by weight of barium sulfate and talc as fillers.

[0018] The preparation method is as follows: put sebacate and guar gum into the reaction kettle, stir and heat up to 50-60°C, then add coniferous wood fiber, sodium hydroxymethyl cellulose, carbon black, and control the temperature at 50-60°C. Stir at 60°C for 30 minutes, finally add barium sulfate and talcum powder and stir and mix for 90 minutes.

Embodiment 2

[0020] In embodiment two, the following components are used to prepare the sealant of the present invention, wherein the percentage is based on the total weight of the sealant: the sebacate of 40% by weight is selected as the biodegradable base oil, The flax gum of 8% by weight is used as biodegradable tackifier, the coniferous wood fiber of 12% by weight is used as biodegradable thickener, the sodium hydroxymethyl cellulose of 7% by weight is used as self-repairing stabilizer, 7% by weight % by weight of white carbon black as an inorganic solid lubricant and 26% by weight of kaolin and heavy calcium as fillers.

[0021] The preparation method is as follows: put sebacate and flax gum into the reaction kettle, stir and heat up to 50-60°C, then add coniferous wood fiber, sodium hydroxymethyl cellulose, white carbon black, and control the temperature at 50-60°C. Stir at 60°C for 30 minutes, and finally add kaolin and heavy calcium and stir and mix for 90 minutes.

Embodiment 3

[0023] In Example 3, the following components are used to prepare the sealing grease of the present invention, wherein the percentage is based on the total weight of the sealing grease: select 39% by weight of azelaic acid ester as the biodegradable base oil, 10% by weight of gelatin as a biodegradable thickener, 11% by weight of coniferous wood fiber as a biodegradable thickener, 7% by weight of sodium hydroxymethylcellulose as a self-healing stabilizer, 7% by weight White carbon black in weight percentage is used as inorganic solid lubricant and 26 weight percent of barium sulfate, kaolin and diatomaceous earth are used as fillers.

[0024] The preparation method is as follows: put azelaic acid ester and gelatin into the reaction kettle, stir and heat up to 50-60°C, add coniferous wood fiber, sodium hydroxymethyl cellulose, white carbon black, and control the temperature at 50-60°C Stir for 30 minutes, add barium sulfate, kaolin and diatomaceous earth and stir and mix for 90...

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Abstract

The invention relates to the field of lubrication sealing materials, in particular to self-repairing biodegradation type sealing grease special for a shield tunneling machine main bearing and manufacturing method of the self-repairing biodegradation type sealing grease. The total weight of the sealing grease is made as the standard, and the sealing grease is composed of, by weight, 38%-45% of biodegradation type base grease, 5%-20% of biodegradation type thickening agents, 7%-12% of biodegradation type gelling agents, 5%-12% of self-repairing type stabilizing agents, 5%-10% of inorganic solid lubricants and the balance filler. Compared with the prior art, raw materials are cheap and easy to obtain, and the technology is simple, an active self-repairing ability is obtained, and very excellent pumping performance, sealing performance, lubricating performance and stabilizing performance are achieved; meanwhile, the self-repairing type stabilizing agents belong to ion type fibers which will actively absorb water and expand in muddy water in an underground construction process and effectively prevent silt from entering the main bearing.

Description

technical field [0001] The invention relates to the field of lubricating and sealing materials, in particular to a special self-repairing biodegradable sealing grease for the main bearing of a shield machine and a preparation method thereof. Background technique [0002] The shield tunneling machine is a construction tool that can support the pressure of the subsurface soil layer and effectively ensure the normal excavation. Currently, it plays a pivotal role in tunnel construction at home and abroad. In a sense, the degree of effective development of underground space also marks the development level of a country's underground engineering technology. Whether a tunnel project can be successfully constructed depends on whether the performance of the shield machine adapts to the geological conditions and construction environment of the project. [0003] In the shield machine equipment, the cutter head operating system is the most effective guarantee for the normal constructio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/06C10M177/00
Inventor 孔晓伟
Owner NATOR LUBRICATION TECH JIANGSU CO LTD