Special main bearing sealing grease for shield tunneling machine as well as preparation method and application thereof

A technology of bearing sealing and special main, which is applied in the field of main bearing sealing grease, can solve the problem of few researchers and achieve the effects of avoiding poor pumping performance, good pumping performance and excellent flame retardancy

Inactive Publication Date: 2018-10-12
CHINA RAILWAY FIFTH SURVEY & DESIGN INST GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as this product is concerned, there are few domestic published documents and few researchers

Method used

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  • Special main bearing sealing grease for shield tunneling machine as well as preparation method and application thereof
  • Special main bearing sealing grease for shield tunneling machine as well as preparation method and application thereof
  • Special main bearing sealing grease for shield tunneling machine as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, the special main bearing sealing grease for the shield machine, its formula components and weight percentages are: 150N base oil 14%, organic soil 125 3%, aluminum hydroxide 14%, polyisobutylene 19.5%, lithium base grease 12% %, lignocellulose fiber 5%, calcium carbonate 28%, graphite 2.8%, molybdenum disulfide 0.5%, barium petroleum sulfonate 1% and antioxidant 1010 0.2%.

[0036] First, set the temperature of the mixing tank to 70°C, add 150N base oil, aluminum hydroxide, and polyisobutylene into the mixing tank, and stir evenly; then, pump the mixed solution in the mixing tank into the kneader, and set the temperature of the kneader to 50 ℃, continue to add graphite, molybdenum disulfide, lignocellulose fiber, organic soil 125, calcium carbonate and lithium base grease; finally, add antioxidant 1010 and barium petroleum sulfonate, continue stirring and kneading for about 2 hours, and the material is ready Special main bearing sealing grease for sh...

Embodiment 2 5

[0042]

[0043]

[0044] Each component of each embodiment is prepared according to the method in embodiment 1, and the corresponding shield machine special main bearing sealing grease is prepared, and according to the test standard in the embodiment, the shield machine special main bearing prepared in embodiment 2-5 is The physical and chemical properties of sealing grease were tested. The test results show that the physical and chemical properties of the sealing grease for the main bearing of the shield machine prepared in Examples 2-5 also reach the performance level of the sealing grease for the main bearing of the shield machine prepared in Example 1.

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PUM

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Abstract

The invention discloses special main bearing sealing grease for a shield tunneling machine. According to the formula, the special main bearing sealing grease is prepared from the ingredients, in percentage by weight: 8-16% of base oil, 2-5% of thickener, 10-20% of fire retardant, 15-25% of tackifier, 12-20% of lubricating agent, 4-8% of reinforcing agent, 20-30% of filler, 0.5-3% of antiwear agent, 1-3% of antirust agent and 0.5-1% of antioxidant. The invention further provides a preparation method of the special main bearing sealing grease for the shield tunneling machine. The special main bearing sealing grease for the shield tunneling machine can resist the water pressure as high as 3.5MPa at the temperature of 25 DEG C in a lab, and has good water pressure resistance and airtightness.The pumping property of the special main bearing sealing grease is 30-60g/min at the temperature of -5-40 DEG C and under the pressure of 1MPa, the pumping property is excellent and not affected by the environmental temperature, and thus the construction problems that the pumping property in winter is poor, and pipes are blocked and the like. In addition, the product has the outstanding fire resistance, abrasive resistance and demulsibility.

Description

technical field [0001] The invention relates to a main bearing sealing grease, in particular to a special main bearing sealing grease for a shield machine, a preparation method and an application thereof. Background technique [0002] In the past ten years, domestic urban rail transit has developed rapidly. According to incomplete statistics, by the end of 2017, 58 cities across the country had been approved for urban rail transit projects, with a total planned mileage of 7,300 km and a total investment of 3.5 trillion yuan. According to estimates, in the next five years, the market capacity of sealing grease for shield machine main bearings will reach 2 billion yuan. [0003] The main bearing sealing grease of the shield machine is specially used for sealing the sealing ring of the main bearing of the cutter head of the shield machine. , bentonite, water, and groundwater enter the main bearing of the shield machine to prevent damage to the rotating parts of the shield mac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10N50/10C10N40/34C10N40/02C10N30/08
CPCC10M169/048C10M2201/041C10M2201/062C10M2201/066C10M2201/084C10M2201/102C10M2201/103C10M2201/105C10M2205/02C10M2205/022C10M2205/024C10M2207/026C10M2207/401C10M2207/402C10M2209/084C10M2209/12C10M2215/065C10M2215/222C10M2217/024C10M2219/044C10M2223/041C10N2010/04C10N2030/08C10N2040/02C10N2040/34C10N2050/10
Inventor 王德乾谢宇飞孙世豪万鹏章远方王浩严振林姚坤峰周衍领耿冬梅胡莲
Owner CHINA RAILWAY FIFTH SURVEY & DESIGN INST GRP
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