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Grease composition and preparation method for standard assembly of tower cranes

A technology of tower crane and grease composition, applied in the field of grease, can solve problems such as difficulty in disassembling pin shafts, and achieve the effects of improving anti-corrosion and anti-corrosion ability, excellent heat resistance, and improving adhesion ability

Active Publication Date: 2017-01-11
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the defect of difficult dismantling of the pin shaft of the existing lubricating grease after the assembly of the standard parts of the tower crane, and to provide a grease that can always maintain rust resistance and durability during the construction period of 1 to 2 years. A special grease composition for the assembly of standard sections of tower cranes with comprehensive properties such as corrosion, wear reduction, and anti-bonding

Method used

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  • Grease composition and preparation method for standard assembly of tower cranes
  • Grease composition and preparation method for standard assembly of tower cranes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The special grease composition for the standard section assembly of tower cranes, the components and mass percentages are as follows:

[0039] (1) No. 2 general lithium grease 90.6%;

[0040] (2) Diphenylamine 0.4%;

[0041] (3) Flake graphite 1.3%;

[0042] (4) Light calcium carbonate 2.7%;

[0043] (5) Sorbitan monooleate 1.2%

[0044] (6) Phenolic resin 1.0%

[0045] (7) Barium dinonylnaphthalene sulfonate 2.3%

[0046] (8) Polyisobutylene 0.5%

[0047]Put 906g of No. 2 general-purpose lithium-based grease (working penetration 287, unit 0.1mm) into the refining kettle, stir and heat up. When the temperature rose to 125°C, the heating was stopped. Add 10 g of phenolic resin and 23 g of barium dinonylnaphthalene sulfonate, and keep stirring at the temperature for 21 min. Cool the material. When the temperature reached 105°C, 4g of diphenylamine, 13g of flake graphite, 27g of light calcium carbonate (45μm sieve residue less than 0.4%), 12g of sorbitan monooleat...

Embodiment 2

[0049] The special grease composition for the standard section assembly of tower cranes, the components and mass percentages are as follows:

[0050] (1) No. 3 general lithium grease 85.5%;

[0051] (2) N-phenyl-α-naphthylamine 0.3%;

[0052] (3) Colloidal graphite 2.7%;

[0053] (4) Light calcium carbonate 3.6%;

[0054] (5) Sorbitan monooleate 1.5%

[0055] (6) Phenolic resin 1.9%

[0056] (7) Barium dinonylnaphthalene sulfonate 3.7%

[0057] (8) Polyisobutylene 0.8%

[0058] Put 855 g of No. 3 general-purpose lithium-based grease (working penetration 245, unit 0.1 mm) into the kettle, and stir to raise the temperature. When the temperature rose to 130°C, the heating was stopped. Add 19 g of phenolic resin and 37 g of barium dinonylnaphthalene sulfonate, and keep stirring at the temperature for 22 minutes. Cool the material. When the temperature reached 99°C, 3g of N-phenyl-α-naphthylamine, 27g of colloidal graphite, 36g of light calcium carbonate (45μm sieve residu...

Embodiment 3

[0060] The special grease composition for the standard section assembly of tower cranes, the components and mass percentages are as follows:

[0061] (1) No. 2 general lithium grease 78.8%;

[0062] (2) N-phenyl-α-naphthylamine 0.8%

[0063] (3) Colloidal graphite 3.2%;

[0064] (4) Light calcium carbonate 4.5%;

[0065] (5) Sorbitan monooleate 3.0%

[0066] (6) Phenolic resin 2.2%

[0067] (7) Barium petroleum sulfonate 6.0%

[0068] (8) Polyisobutylene 1.5%

[0069] Put 788g of No. 2 general-purpose lithium-based grease (working penetration 287, unit 0.1mm) into the kettle, stir and heat up. When the temperature rose to 135°C, the heating was stopped. Add 22g of phenolic resin and 60g of barium petroleum sulfonate, keep the temperature and stir for 30min. Cool the material. When the temperature reaches 110°C, add 8 g of N-phenyl-α-naphthylamine, 32 g of colloidal graphite (particle size less than 30 μm), 45 g of light calcium carbonate (45 μm sieve residue is less t...

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Abstract

The invention relates to a grease composition for assembling standard sections of a tower crane and a preparation method of the grease composition. The grease composition comprises the following components in percentage by weight: 78.8%-94.8% of common lithium-based grease, 0.2%-0.8% of antioxidant, 0.8%-3.2% of graphite powder, 1.0%-4.5% of light calcium carbonate, 0.5%-3.0% of sorbitan monooleate, 0.4%-2.2% of phenolic resin, 2.0%-6.0% of sulfonate and 0.3%-1.5% of polyisobutene. The special grease composition for assembling the standard sections of the tower crane is obtained by adding additives such as the antioxidant, an antifriction agent, an anti-locking and anti-occluding agent, an anti-rust agent, a tackifying agent and the like into the common lithium-based grease taken as a carrier. According to the grease composition, the corrosion speed of shaft pins of the tower crane can be slowed, the shaft pins are prevented from being corroded and bonded with a shaft sleeve during building construction, and the pin shafts of the standard sections of the tower crane can be smoothly assembled and disassembled. The service cycle of the grease composition is within 1-2 years.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, and in particular relates to a grease composition for standard assembly of tower cranes and a preparation method thereof. Background technique [0002] Tower cranes, referred to as tower cranes or tower cranes, are the most commonly used lifting equipment on construction sites. The tower body is the "trunk" of the tower crane. It is installed at the construction site by standard sections one by one by the jacking device of the tower crane itself to reach the required working height, and it mainly plays the role of supporting the upper working parts. The connection of the standard section shall be connected by a special high-strength fastener, that is, the pin shaft, through which the lower support and the standard section can be firmly connected. The tower body mainly bears the axial pressure, horizontal force, bending moment and torque from the top working parts. The pin shaft is th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/06C10N50/10C10N30/12C10N30/06C10N30/10
Inventor 王先会王兆坤李素高艳青吴宝杰
Owner CHINA PETROLEUM & CHEM CORP
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