Foreign low noise sealed bearings grease with roughly divided into three types: the general low noise motor bearing grease, low temperature high-speed bearing grease, long life and low noise high bearing grease.

A. general low noise motor bearing grease

In bearing industry, the largest of the grease use accounting for about 70% of the total amount with fat. Because this kind of grease choose the fiber soft, easy to filter of lithium soap thickener, the use of mineral oil for base oil, it is easy to meet low-standard bearings reduce vibration value requirements. Another advantage is that good pumping , whether mechanical fatliquoring, or manual besmear fat, easy to operate. And, the lower the price of the grease, can greatly reduce the cost of bearing. But, thanks to the mineral base oil, make this kind of grease in derusting and anti-corrosion properties outside of the some physical and chemical indexes on the big discounts. Such as bearing life can reach 200 hours, starting and running torque-20 ℃ in a difficult test. The average temperature for use grease-20 ~ 120 ℃, 150 ℃ high temperature above when in use, can appear base oil evaporation too fast, erosion phenomenon, greatly shorten the bearing service life.

B. high temperature long life low noise bearing grease

Under the environment of high temperature in the use of the grease should have the following characteristics:

A quiet, has certain effect, because high temperature lubricating greases fiber general hardness is bigger, so in bearing noise test the performance not better than lithium base grease.

B, under high temperature is not lost, in about 180 ℃  keeping a certain temperature consistency, not soften.

C, oil leak is less. When grease in bearing under high frequency of shear and  centrifugal force and effect, lubrication can promptly back into the groove don't throw out.

D, this kind of grease should have certain service life of high temperature and under high temperature has good oxidation resistance, so as to extend the life of the bearing and the related equipment.

C. Cryogenics high-speed bearing grease

At present, the use of the equipment precision bearing is fine, prompting bearing grease used must have the following properties:

In turn, a condition that starting and flexibility of operation bearing, ensure the minimum power output.

B, the dn > 5 x 105 of the high speed to ensure that the low temperature of the motor, don't jilt oil, so as to reduce power consumption, protect the motor.

C, the content of impurities in certain standards under control, the most the earth reduce equipment noise pollution to the environment.



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