Knowing these 6 indicators of vacuum pump oil, it is easy to use oil correctly!
May 01, 2022
If you do not understand the principle of vacuum pump oil, you will use oil indiscriminately, reduce the performance of the pump, and cause failures. Understand the working principle of oil, use oil correctly, and know how to choose oil correctly.
We know that vacuum pump oil plays a role in lubricating and sealing the vacuum pump. If the vacuum pump oil is used incorrectly, it will cause smoke from the exhaust port. Oil plays a vital role in the pump. In order to save costs, many application companies However, if other brands of oil are used in combination or directly replaced with cheap oil, if different oils are used in combination, conflicts will occur due to different indicators such as the ignition point and vapor pressure of the oil. , reduce the effect of oil. Vacuum pump oil is also a factor that directly affects the life of the pump. How to buy vacuum pump lubricating oil, first of all, it is necessary to clarify several performance indicators of the pump oil, that is, the principle parameters of the pump oil. 1. The vapor pressure of the qualified pump oil should not be too high. Vapor pressure is an important parameter for pump oil, which is a factor to ensure that the vacuum pump can continuously and quickly obtain vacuum and maintain the stability of the ultimate pressure. Pumps with different vacuum degrees have different requirements on the saturated vapor pressure of the pump oil. For ultra-high vacuum or high vacuum with high vacuum degree, the saturated vapor pressure should be lower. Therefore, according to the needs of the pump, choose the appropriate vacuum pump oil. 2. Do not buy the most expensive pump oil, but buy the most suitable one. Another performance indicator is the viscosity of the oil. If the viscosity is too high, the resistance of the moving parts will increase, which will increase the loss of energy. If the viscosity is too low, the sealing effect of the oil will be weakened, which will easily lead to leakage and deterioration. 3. Strong anti-oxidative stability. In the process of vacuum pumping, the rotor rotates at high speed, the temperature rises, the oil is oxidized and decomposed by heat and then volatilized, and discharged from the exhaust port, which leads to waste of oil. Therefore, an oil with stronger antioxidant stability should be selected. 4. Strong anti-corrosion and anti-emulsification properties. Due to the wide range of pump applications and complex working conditions, some pumping gases contain corrosive gas or water vapor, which will chemically react with the vacuum pump oil, pollute the pump oil and accelerate the emulsification of the oil, so the pump oil should have good aviation corrosion performance and Anti-emulsification properties. 5. Has a high flash point. The flash point refers to the temperature at which the vapor and air mixture on the surface of the flammable liquid is in contact with an open flame for the first time to flash. If this temperature is too low, it will affect the saturated vapor pressure. 6. The vacuum pump oil needs to have a lower ultimate pressure. The above 6 indicators are the interpretation of the principle of vacuum pump oil. After understanding these 6 indicators, I believe you have a further understanding of the pump oil, and also provide you with ideas on how to choose the right pump oil.
