来源：慕名 2019年11月05日 10:08
first of all, the grease is semi-solid, does not flow at room temperature, so the friction parts of the fat or grease more difficult to clean the bearing is not very convenient. at the same time, mixed with water, dust, debris difficult to get rid of, unlike the impurities in lubricating oil, generally sink in the lower part, it is easy to get rid of the oil filter.
secondly, the mixing resistance is large, so the heat is large, cooling effect is poor. however, this situation is closely related with the lubrication method, such as fire tunnel kiln induced draft fan, motor power 75kw, speed 960r / min, the bearing bearing oil bath full immersion lubrication, 220 base oil made of grease , 68 than the original use of the lubricating oil, the bearing temperature dropped 4-6 ℃.
finally, the high speed is not suitable, in general, the ordinary mineral oil grease, only allows the use of the speed of dn value of less than 300,000 cases. with the development of grease technology, synthetic grease can be used to the dn value of 50-60 million, or even 100 million, grease the use of the highest temperature, the most high-speed examples of high-altitude unmanned jet reconnaissance aircraft engine bearings, in order to reduce the quality of the aircraft, the use of grease lubrication.
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grease in the use of the process of what kind of limitations?
[ 2019-11-05 ]grease in the use of the process of what kind of limitations?
