What is the viscosity of lubricating oil related to?
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After the lubricant in our press starts to operate, its viscosity gradually decreases. During use, imported oil performs better than domestic oil. What causes the viscosity of lubricating oil to decrease? Some say it’s a problem with the oil itself, others claim that light hydrocarbons got mixed in during the production process, causing the viscosity to decrease, and still others say there is water present in the oil. Could you help explain it? Thank you
The viscosity of lubricants is classified into many different grades, and each viscosity level is suitable for certain operating temperatures and durations. If these conditions are exceeded, the viscosity of the lubricant decreases, and in severe cases, it becomes unusable. It is recommended that you check the operating temperature range for your lubricant; if the actual operating temperature exceeds this range, then you should switch to a different type of lubricant.
1 The higher the lubricant grade, the greater its viscosity. To establish a uniform standard, the viscosity of various lubricants is specified at the same temperature, usually around 40 degrees. 2 The viscosity of lubricants decreases as the temperature rises. 3. When selecting lubricant, factors such as the machine’s speed of operation, the load it bears, and the operating temperature must be taken into account, as well as the working environment. For example, in the northern regions, winter and summer temperatures can differ significantly; it is recommended to use lubricants with different viscosities in such cases. 4. In addition to viscosity, lubricants have many other performance parameters. When making a choice, it is advisable to consult the lubricant manual and the equipment maintenance manual to ensure that the properties of the lubricant match the requirements of the equipment. 5. Factors such as water intrusion, the presence of other impurities, or deterioration and emulsification can also change the viscosity of the lubricant
Of course, the viscosity decreases when it is in operation. It is normal for the viscosity of lubricating oil to be lower as its temperature increases. The manufacturer should provide a curve showing the relationship between lubricant viscosity and temperature; it is only abnormal if the value is significantly lower than that on the curve.
With changes in temperature, when a hydrogen compressor is operated for extended periods of time, the temperature of the crankcase increases, which leads to a decrease in the viscosity of the lubricating oil. Generally, hydrogen compressors require different oil grades for use in winter and summer
We include oil quality as part of the inspection routine.