172results about How to "Improve extreme pressure and anti-wear performance" patented technology

The invention discloses lubricating grease for hubs of heavy trucks. The lubricating grease consists of base oil, thickening agent and additive, the thickening agent is composite lithium soap thickener, and the additive consists of borate oiling agent, compound viscosity index improver, purification dispersant, amine-type antioxidant, sulfur-phosphorous-type antioxidant and sulfonate antirusting agent. The special lubricating grease for hubs of trucks which is obtained by means of circular shearing treatment is excellent in heat resistance, adhesion, mechanical stability, water resistance, extreme pressure abrasion resistance and the like, and can meet requirements on lubrication and protection for bearings of the hubs of the trucks under harsh conditions.

The invention relates to a lubricating grease and a preparation method thereof, particularly relates to a lubricating grease for a hub bearing of a heavy load truck and a preparation method thereof, and belongs to the technical field of a chemical industry. The lubricating grease is prepared from the following raw materials: (A) base oil which accounts for 60-85% of total weight of the lubricating grease, (B) a thickening agent, which is C12-C22 unitary organic acid which accounts for 7-12% of total weight of the lubricating grease, 0.5-3% of sebacic acid, 0.2-1% of boric acid, and 3-5% of lithium hydroxide oil solution, (C) an additive, which is thiocarbamate which accounts for 0.5-3% of total weight of the lubricating grease, 2-5% of sulfide olefin cottonseed oil, 2-4% of dialkyl dithiocarbamate salt, 0.5-2.5% of molybdenum dialkyl dithiophosphate, 0.3-2% of antirust agent and 0.3-1% of antioxidant. The lubricating grease has the beneficial effects that the production time is shortened; the lubricating grease is more controllable in process, stable in product quality, less in seepage loss of a high-temperature bearing, and prominent in extreme pressure property; lubricating protection can be better provided for hubs of the heavy load truck; the lubricating requirements of the hub bearing of the heavy load truck under various working conditions can be met; the grease exchange period of the hub bearing is prolonged.

The present invention provides a worm wheel worm rod lubricating oil composition and a preparation method thereof. The worm wheel worm rod lubricating oil composition comprises 45-75 wt% of poly[alpha]-olefin, 10-45 wt% of oil-soluble polyether, 0.1-5 wt% of an antioxidant, 0.01-0.5 wt% of a metal deactivator, 0.1-5 wt% of a corrosion inhibitor, 0.5-5 wt% of an extreme pressure anti-wear agent, and 0.0005-0.05 wt% of an anti-foaming agent. According to the present invention, the poly[alpha]-olefin and the oil-soluble polyether are adopted as the base oils, the antioxidant, the metal deactivator, the corrosion inhibitor, the extreme pressure anti-wear agent and the anti-foaming agent are adopted as the additives, and the contents of each component are controlled within the content range, such that the worm wheel worm rod lubricating oil composition has the good extreme pressure anti-wear property and the excellent oxidation stability; and the worm wheel worm rod lubricating oil composition further has characteristics of excellent corrosion resistance, excellent rust resistance, excellent shear stability, good oil-water separation property and good anti-foam property.

The invention relates to a cold heading oil composition and an application thereof. The composition mainly solves the problems in the prior art that the extreme pressure anti-wear property and copper corrosion resistance of cold heading oil cannot satisfy usage requirements of partial cold heading equipment for lubrication unified oil supply for cold heading process and equipment, galling is generated on the surface of workpiece, or transmission gear shaft is corroded. The composition comprises the following components in parts by weight: a) 100 parts of mineral base oil; b) 0.1-5.0 parts of an anti-wear reagent at extreme pressure; c) 0.01-0.5 parts of a metal passivator; d) 1.0-15.0 parts of an oiliness agent; e) 0.005-0.5 parts of an anti-foaming agent. The anti-wear reagent at extreme pressure is a mixture of sulfurized olefin and at least one of sulfurized isobutylene, phenyl sulfide, sulfurized fatty acid ester or ammonium thiophsphonate. The metal passivator is selected from at least one of triazole derivatives or thiadiazole derivatives; the oiliness agent is a mixture of sulfurized plant oil and at least one selected from fatty acid ester or high-grade fatty alcohol. The technical scheme can better solve the problem, and is used for partial cold heading equipment for lubrication unified oil supply for cold heading process and equipment.

The invention discloses lubricating grease with long service life, extreme pressure and high-temperature resistance and a preparation method thereof. The lubricating grease comprises the following components in percentages by weight: 8.1 to 18.6% of a thickening agent, 0.3 to 0.7% of fatty alcohol, 2 to 10% of dibasic acid polyester, 0.3 to 1.5% of an antioxidant, 0.3 to 1.0% of a metal deactivator and 2 to 5% of an extreme-pressure antiwear agent, with the balance being base oil. The invention has the following advantages: the lubricating grease has excellent high-temperature resistance, shear stability and extreme-pressure wear resistance and good storage stability, adhesiveness and low-temperature fluidity; the requirement of a bearing for lubricating under various working conditions ofhigh temperature, high speed, heavy load and even impulse load can be met; a grease exchange period can be prolonged; meanwhile, the preparation process for the lubricating grease is simple, and facilitates large-scale industrial production.

A universal oil composition for gear contains mineral lubricating oil or synthetic lubricating oil or their mixture, at least one viscosity index improver and / or pour depressor, at least one S-contained extreme-pressure agent, at least one P-contained antiwear agent, phosphate-type multi-effect agent, oil agent (1-hydroxyethylene-1, 1-biphosphonate), and at least one metallic deactivator and / or antirust agent.