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Shield machine base bearing special-purposed sealing grease and preparation method thereof

A sealing grease and main bearing technology, which is applied in the petroleum industry, lubricating composition, etc., can solve the problem that the lubricity of the pumpable sealing material is not enough to meet the technical requirements of the main bearing of the shield machine, the loss of the shield machine, and the difficulty of replacing maintenance parts And other issues

Active Publication Date: 2012-07-25
上海翔威环境科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cutter head of the shield machine generally operates in a working environment with a lot of water, mud, dust, high pressure, and high load, and needs to withstand at least about 0.3MPa of earth pressure or water pressure, and due to the special working principle , the shield construction cannot be retreated. If the main shaft fails during the construction process, its maintenance and parts replacement operations are very difficult. Therefore, the sealing effect of the main bearing sealant is very important in the operation of the shield machine. Otherwise, once the muddy water passes through the grease and reaches the main bearing gap, it will cause damage to the main bearing or gear, which will bring immeasurable losses to the shield machine and even cause safety accidents
Although people have developed some sealing greases for other parts of the shield machine, such as the shield tail brush, these sealants are not enough to satisfy the shield machine owners in terms of pumpability and lubricity to sealing materials. Bearing process requirements

Method used

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  • Shield machine base bearing special-purposed sealing grease and preparation method thereof

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Embodiment 1

[0021] In embodiment 1, 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: pentaerythritol oleate 38.0%, YYD-15 wood fiber (Langfang Yiyuedi Chemical Industry Co., Ltd. Co., Ltd. production, fiber length 1.5mm) 8.0%, polybutene PB1400 10.0%, BT-838S organobentonite 5.5%, No. 0 molybdenum disulfide 6.0%, barium sulfate 32.5%.

[0022] The preparation method is as follows: put pentaerythritol oleate and polybutene PB1400 into the stirring mixer, stir and heat up to 80°C, add YYD-15 wood fiber, control the temperature at 80-90°C and stir for 45 minutes, add BT-838S organic Bentonite, after stirring for 45 minutes, add barium sulfate and No. 0 molybdenum disulfide, and stir and mix at 80-90°C for 120 minutes.

Embodiment 2

[0024] In this embodiment, the following components are used to prepare the sealant of the present invention, and the percentages are based on the total weight of the sealant: polyalphaolefin PAO 942.0%, sepiolite fiber 9.0%, PRS-A1100 Refined C5 petroleum resin 7.0%, CAB-O-SIL M-5 fumed silica 6.0%, No. 0 colloidal graphite 6.0%, zinc sulfate 10.0%, barium sulfate 20.0%.

[0025] The preparation method is: put PAO 9 and PRS-A1100 refined C5 petroleum resin into the stirring mixer, stir and heat up to 90°C, after the PRS-A1100 refined C5 petroleum resin is completely dissolved, add sepiolite fiber, and control the temperature at 80~ Stir at 90°C for 60 minutes, add CAB-O-SIL M-5 fumed silica, stir for 30 minutes, then add zinc sulfate, barium sulfate and No. 0 colloidal graphite, stir and mix at 80-90°C for 120 minutes.

Embodiment 3

[0027] In this embodiment, the following components are used to prepare the sealant of the present invention, and the percentages are based on the total weight of the sealant: isooctyl oleate 30.0%, polyalpha-olefin PAO 2510.5%, YYD- 15 Wood fiber 4.0%, sepiolite fiber 5.0%, polybutene PB2400 9.0%, BT-838S organic bentonite 6.0%, No. 0 molybdenum disulfide 4.5%, Dyneon TF-9207 polytetrafluoroethylene powder (purchased from 3M company) 2.0%, calcium carbonate 8.0%, barium sulfate 21.0%.

[0028]The preparation method is as follows: put isooctyl oleate, PAO 25, and PB2400 into the stirring mixer, stir and heat up to 70°C, after mixing evenly, add YYD-15 into the wood fiber and sepiolite fiber, and control the temperature at 70°C Stir at ~80°C for 45 minutes, add BT-838S organic bentonite, stir for 45 minutes, then add calcium carbonate, barium sulfate, Dyneon TF-9207 PTFE powder and No. 0 molybdenum disulfide, stir and mix at 70-80°C 90 minutes.

[0029] Various performance pa...

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Abstract

The invention disclose shield machine base bearing special-purposed sealing grease. According to the total weight of the sealing grease, the sealing grease comprises components of, by weight: 35-50% of base oil, 5-15% of a reinforcing agent, 5-11% of a tackifier, 5-10% of a thickening agent, 3-10% of a solid lubricant, and balance of a filling material. The invention also provides a preparation method of the sealing grease. The special-purposed sealing grease has good adhesion performance, water resistance, anti-wear lubricity, corrosion resistance, and pumpability. The sealing grease is especially suitable for a shield machine base bearing for realizing excellent sealed material lubrication protection and water-resisting and slurry-resisting sealing functions.

Description

technical field [0001] The invention relates to the field of lubricating and sealing materials, in particular, the invention relates to sealing grease and a preparation method thereof. The sealant is especially suitable for sealing the main bearings of shield machines. Background technique [0002] With the increasing pressure of urban transportation, the subway, a fast, efficient and safe transportation mode, has effectively relieved the heavy urban traffic pressure. Shield technology effectively solves the construction problems of subways, tunnels, and municipal pipeline projects in soft soil layers. Shield technology is fast, efficient and safe, making it widely used. [0003] The shield machine is the main construction machine in the shield construction. The shield machine uses the cutter head to cut the soil on the excavation surface. During this process, the shield-shaped steel shell is used to support the surrounding rock to avoid collapse. Segments for lining and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N40/34C10N40/02C10N50/10
Inventor 叶进春洪显忠魏彩虹
Owner 上海翔威环境科技集团有限公司
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