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Grease and preparation method thereof

A technology of grease and lithium-based grease, which is applied in the petroleum industry, lubricating compositions, etc., can solve problems such as easy leakage of lubricating oil, failure of partial wear of hobs, and excessive lubricating oil, so as to achieve low sealing requirements and ensure bearing operation , Guarantee the effect of failure life

Inactive Publication Date: 2018-10-19
冯连银
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing hob lubricating oil has relatively good fluidity and high loss during use, and generally requires high sealing performance of the shield hob in order to achieve long-term lubrication effect
Moreover, if the lubricating oil is added to overflow due to human error, the lubricating oil will also easily leak when the seal fails slightly, resulting in dry grinding of the bearing, resulting in failure of the eccentric wear of the hob

Method used

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  • Grease and preparation method thereof

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Effect test

Embodiment 1

[0027] The grease of the present invention is preferably carried out at normal temperature, dust-free, and in a closed space, and the coordination of each component includes: 6.5 parts of polytetrafluoroethylene (model: KR-T30), fluorinated graphite (CAS: 51311-17-2) 2.0 parts, graphite (T-97-99) 3.0 parts, molybdenum disulfide (HT206 molybdenum disulfide grease) 5.5 parts, niobium nitride (CAS: 24621-21-4) 5.0 parts, lithium Base grease (Great Wall 3# extreme pressure lithium base grease) 65 parts, machine oil (L-AN150) 11 parts, rust inhibitor (RT-9412 oil-soluble rust inhibitor) 2 parts. First, add lithium-based grease, graphite fluoride, and graphite into the mixer, and stir for about 30 minutes until fully integrated (that is, no sinking and no layering); then, add polytetrafluoroethylene, molybdenum disulfide, and niobium nitride in sequence , antirust agent, continue stirring, stirring for about 90 minutes, until fully blended (that is, no sinking and no stratification)...

Embodiment 2

[0029] The grease of the present invention is preferably carried out at normal temperature, dust-free, and in a closed space, and the coordination of each component includes: 6.5 parts of polytetrafluoroethylene (model: KR-T30), fluorinated graphite (CAS: 51311-17-2) 2.0 parts, graphite (T-97-99) 3.0 parts, molybdenum disulfide (HT206 molybdenum disulfide grease) 5.5 parts, niobium nitride (CAS: 24621-21-4) 5.0 parts, lithium Base grease (Great Wall 3# extreme pressure lithium base grease) 65 parts, machine oil (L-AN150) 11 parts, rust inhibitor (RT-9412 oil-soluble rust inhibitor) 2 parts, antioxidant (N,N'- Oxalamide) 1.5 parts. First, add lithium-based grease, fluorinated graphite, and graphite into the mixer, and stir for about 30 minutes until fully fused (that is, no sinking and no layering); then, add polytetrafluoroethylene, molybdenum disulfide, niobium nitride, Rust inhibitor, antioxidant, continue to stir, stir for about 90 minutes, until fully blended (that is, no...

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Abstract

The invention discloses grease and a preparation method thereof. The grease disclosed by the invention comprises the following components: polytetrafluoroethylene, carbon monofluoride, graphite, molybdenum disulfide, niobium nitride, lithium-based grease, mechanical oil and an anti-rusting agent. The grease preparation method comprises the following steps: firstly, sufficiently stirring the lithium-based grease, the carbon monofluoride and the graphite in a stirring machine till sufficient fusion; adding the polytetrafluoroethylene, the molybdenum disulfide, the niobium nitride and the anti-rusting agent, and continuously stirring till sufficient fusion; adding the mechanical oil, and continuously stirring till sufficient fusion. The grease has the beneficial effects that the grease is thick and viscous, poor in flowability and low in sealing property requirement on tunneling and rolling cutters, the consumption of the grease in use is remarkably lower than that of the mechanical oil,the consequence that excessive lubricating oil overflows because of artificial operation mistakes after the grease is injected into the tunneling rolling cutter is avoided, the grease is low in sealing property requirement, the consequence that the grease leaks off and thus the rolling cutter is failed when sealing is slightly failed is avoided, a bearing can be still lubricated, operation of thebearing can be ensured, and the failure life time of the rolling cutter can be ensured.

Description

technical field [0001] The invention mainly relates to the field of shield machine lubricating grease, in particular to a grease and a preparation method thereof. Background technique [0002] Grease is one of the lubricating materials in the shield hob and plays an important role in the use of the hob. Grease should have a good lubricating effect, which can effectively lubricate the hob bearing, absorb the heat of the cutter, and ensure the smooth advancement of the shield. Existing hob lubricating oil fluidity is relatively good, and loss is higher in use, and generally all requires higher sealing performance to shield hob, just can obtain long-term lubricating effect. And if the lubricating oil overflows after adding too much because of human error, the lubricating oil is also easy to leak when the seal is slightly ineffective, causing the bearing to dry grind, so as to cause the partial wear of the hob to fail. Contents of the invention [0003] The purpose of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N30/02C10N40/02
CPCC10M169/00C10M2201/041C10M2201/042C10M2201/061C10M2201/066C10M2213/062C10M2215/08C10N2030/02C10N2040/02
Inventor 冯连银李鸿士王堉铖
Owner 冯连银