Vacuum pump oil

Abstract

The invention discloses a vacuum pump oil, which is composed of the following components by mass percentage: 0.6-3% of an antioxidant ingredient; 0.5-3% of a friction modifier; 0.01-3% of an extreme pressure antiwear agent; 0.005-1% of a metal deactivator; 0.01-0.5% of a demulsifying agent; and the balance base oil. Specifically, the base oil comprises the following components by mass percentage: 5%-30% of modified polyether; 10%-20% of saturated polyol ester; and 60-80% of poly alpha olefin. The vacuum pump oil provided by the invention not only has good compatibility, but also is an environment-friendly green product.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a vacuum pump oil. Background technique [0002] Vacuum pump oil is a lubricating oil specially developed for vacuum pumps on vacuum equipment. It is divided into two types: mineral oil and synthetic oil. With the rapid development of modern industry, the original formula of highly refined mineral oil and various compound additives can no longer meet the complex and stringent requirements of customers. The traditional technology mainly shows the disadvantages of the following two aspects: [0003] On the one hand, due to the incompatibility of the selected raw materials and additives in the existing vacuum pump oil, the quality of the oil is poor, mainly due to the interference of a small amount of water, the lubricity of the vacuum pump oil in the traditional technology decreases; The solubility of the components to low-molecular compounds is low. [0004] On the other hand, ...

AI Technical Summary

Problems solved by technology

[0003] On the one hand, due to the incompatibility of the selected raw materials and additives in the existing vacuum pump oil, the quality of the oil is poor, mainly due to the interference of a small amount of water, the lubricity of the vacuum pump oil in the traditional technology decreases; Components have low solubility for low-molecular-weight compounds, etc.

[0004] On the other hand, with the development of the current technology, the internal gap of the vacuum oil pump is getting smaller and smaller, and the operating temperature per unit time is also rising. When the metal surface bears a high load, the direct contact between the metal surfaces generates a large amount of heat, and the film formed by the anti-wear agent is also destroyed and no longer protects the metal surface. The metal surface will be scratched or even welded, which will lead to damage to the vacuum pump body and cannot operate normally.

At the same time, the traditional extreme pressure antiwear agent contains elements such as S, P, Cl, etc. First, because the extreme pressure antiwear agent decomposes or breaks at high temperature, it is easy to generate free radicals, which is prone to gelation. The gel that makes the oily vacuum pump oil into latex loses its lubricating effect; the second is that S, P, Cl, etc. form small molecules or simple substances that are released into the environment and have adverse effects on the environment. The most important thing is that there are many machines or the operating temperature of the machine When higher, a nasty-smelling gas or smoke escapes

Vacuum pumps often need to operate at a relatively high temperature of 110~130°C, and under many working conditions, dozens or even hundreds of vacuum pumps will operate at the same time, so the oil containing S, P, and Cl extreme pressure agents will easily escape. smell

With the development of the times, the front-line workers have higher and higher requirements for the working environment. The use of oil products containing S, P, and Cl extreme pressure agents is very easy to be complained by front-line workers, and the working conditions cannot be met without lubricating extreme pressure agents. Require