【Q&A Question 074】2016.07.03
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【Q&A Question 074】July 3, 2016: Why is grease used for the bearings of small pumps, while lubricating oil is used for large pumps? The answer key will be available after responding; scoring is based on addressing the key points. Large pump motor shafts have high power, which results in high bearing temperatures; lubricating oil not only provides lubrication but also serves a cooling function.
Lubricants primarily serve functions such as lubrication, cooling, rust prevention, cleaning, sealing, and cushioning； Grease is used in the friction-prone parts of machinery to provide lubrication and sealing; it is also applied to metal surfaces to fill gaps and prevent rust. It is related to the rotational speed
In fact, grease is just lubricating oil with a thickening agent added to it. The difference between the two is that lubricating oil primarily serves functions such as lubrication, cooling, rust prevention, cleaning, sealing, and cushioning ； Grease is used in the friction-prone parts of machinery to provide lubrication and sealing; it is also applied to metal surfaces to fill gaps and prevent rust. The similarity is that both serve to lubricate and reduce friction. As for application: both of these categories have many models, and it depends on the specific model~
The motor speeds are different; the use of lubricating oil for the small pump motor does not yield as good results as using grease
Since small motors generate little heat, using lubricant is sufficient to carry away the heat； Large pump bearings generate a lot of heat during operation, and only lubricating oil can carry away this heat.
Large pump motor shafts have high power, which results in high bearing temperatures; lubricating oil not only provides lubrication but also serves a cooling function.