How to change the compressor oil correctly?
Release time:
2024-04-25
How to replace the compressor oil correctly, let the small band learn about it!
Most compressor plants specify the compressor oil replacement period in their respective instructions. However, it is unreasonable to simply use the operating hours as the oil replacement cycle. Because of the same type of compressor, due to different working conditions, the degree of aging and deterioration of lubricating oil in use is different. Therefore, the use of compressor oil cycle and oil change indicators, is a very important issue.
1. Oil change index of compressor oil:
(1) live pressure compressor: high pressure, internal use (cylinder), dirty oil type primary lubrication; High pressure, external use (bearing), oil change quality index: viscosity change is more than +/-15%, acid value is more than 2.0mgKOH/g, residual carbon is more than 1.0, positive heptyl insoluble is more than 0.5; Low pressure, shared by cylinder and bearing, oil change quality index: viscosity change is more than +/-15%, the acid value is greater than 2.0mgKOH/g, the residual carbon is greater than 1.0%, and the positive heptan insolubles are greater than 0.5%.
(2) Rotary compressor: rotor, bearing, oil change quality index: viscosity change is greater than +/-15%, acid value is greater than 0.5mgKOH/g, and positive heptyl insoluble matter is greater than 0.2. (3) Speed compressor: seal and bearing; The oil change quality index is: viscosity change is greater than +/-15%, acid value is greater than 0.5mgKOH/g, and positive heptyl insoluble matter is greater than 0.2.
2. Oil change index of light-load rotary air compressor oil: the change rate of viscosity and kinematic viscosity at 40 ℃ exceeds 10%, the increase of acid value is greater than 0.2mgKOH/g, the insoluble matter of n-pentane is greater than 0.2, and the oxidation stability of lubricating oil is less than 50 minutes (SH/T0193).
3. Oil change index of ammonia-resistant compressor oil: kinematic viscosity change rate at 40 ℃ exceeds 10%, acid value increase value is greater than 0.2mgKOH/g, flash point (open) is 8 ℃ lower than new oil standard, moisture content is greater than 0.1, emulsion breaking time is greater than 80 minutes, liquid phase corrosion test (15 steel bars, 24 hours, distilled water) corrosion, oxidation stability is less than 60 minutes, ammonia resistance test is unqualified.
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