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Mill bearing equipment and protection (4)
Source: Bearing network time: 2018-05-26
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Smooth grease is composed of base oil, thickener and filler. The viscosity of base oil plays an important role in the smooth function of smooth grease; the function of thickener to grease; especially temperature, water resistance and oil Etc. has important influence; the additive is mainly used to enhance the anti-gasification, anti-rust, extreme pressure and other functions of smooth grease.
Smooth grease is classified according to different varieties of thickeners; it is divided into lithium base, nano base, etc. Rolling mill bearings are commonly used for lithium-based smooth grease; lithium-based grease is characterized by better water resistance; High point; can be applied to the mechanical parts of wet and touch with water. Smooth grease is divided into several grades according to its fluidity, ie penetration. The greater the penetration value, the softer the smooth fat. Commonly used lithium-based smooth grease Function see table below smooth grease penetration 1/10mm drop point C ≥ composition characteristics trademark general lithium-based smooth grease ZL-1ZL-2ZL-3310-340265-295265-295170175180 natural fatty acid lithium soap thickening medium viscosity smooth oil anti-anti Oxygen agent excellent water resistance, mechanical stability, water resistance and oxidation stability. Suitable for temperature range -20--120 ° C. Extreme pressure lithium-based smooth grease 012315-385310-340275-295170 outstanding mechanical stability, water resistance , rust resistance, extreme pressure anti-wear and pumpability. Suitable for -20--120 ° C temperature scale.
Domestically produced roll bearing smooth grease; is a multi-component lithium complex grease compounded by high-grade fat acid-proofing and synergist; also suitable for the smoothness of rolling mill bearings.
3, smooth fat filling amount of smooth fat filling; to fill the bearing and bearing shell space of one-third and one-half is appropriate; if too much fat; because of mixing and heating; will make lipids worse Or Qinhua. When filling at high speed, it should only be filled to one-third or less. When the speed is very low; to avoid external physics entering the bearing; can fill the shell space.
4, smooth fat replacement smooth grease life is limited; its smooth function gradually decline in the process of application; wear is gradually increasing; therefore, every distance must be necessary to make up for replacement.
The compensation cycle of smooth grease is related to the layout of the bearing, the speed, the temperature and the environment; it should be determined according to the detailed working conditions of the company. Pay attention to the smooth grease replacement; the smooth grease with different trademarks can not be mixed; The fat phase of the agent is mixed; it will damage the smooth layout and consistency; if it is necessary to replace the smooth grease with different trademarks; the original smooth grease in the bearing should be completely removed; add new smooth grease.
Fourth, the rolling mill bearing storage and storage bearings is a fine mechanical components; there are more stringent requirements for its storage and storage.
(1) Treasury temperature: The bearing is coated with anti-rust oil before leaving the factory; if the temperature is too low or too high, it will cause rust-proof oil to change; the room temperature should be controlled at 0-25 °C. (2) Warehouse humidity: too high humidity will cause Bearing corrosion; the relative humidity of the warehouse should be kept at 45%-60%. (3) Treasury environment: the bearing is the best to be stored alone; when it is necessary to register with other items; other items in the same place must not be acid, alkali, salt Such as chemicals. Bearings should be placed off the ground; away from the heating pipe. (4) Timing view: according to the rule of bearing product anti-rust; every 10-12 months to check once. If the oil seal package is found to have rusty appearance; should be from scratch Carry out oil seal packaging.
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