High-vacuum vacuum pump oil

Abstract

The invention discloses high-vacuum pump oil which is obtained by adding ash-free additive to compressed and distilled high-vacuum base oil. The high-vacuum pump oil comprises the following components in percentage by weight: 0.3%-1% of antioxidant, 0.02%-0.1% of metal passivator, 0.01%-3% of anti-wear reagent at extreme pressure, 0.02%-1% of antirust agent, 0.005%-0.05% of demulsifying compound and 0.05%-0.05% of anti-foaming agent, wherein the antioxidant comprises amine antioxidant and / or phenolic antioxidant; the amine antioxidant comprises high-polymer diphenylamine; the phenolic antioxidant comprises high-polymer mixed phenol. The high-vacuum pump oil disclosed by the invention has high-limit vacuum degree, and total limit pressure of 1*10<-4>kPa; and moreover, the vacuum oil is further provided with excellent oxidation resistance, high temperature resistance and anti-wear performance at extreme pressure without affecting the vacuum.

Description

technical field [0001] The invention particularly relates to a high-vacuum pump oil suitable for a high-vacuum system, which belongs to the field of vacuum technology. Background technique [0002] In recent years, my country's vacuum technology field has developed by leaps and bounds, and internationally renowned large companies have entered China one after another. For example, the vacuum obtaining equipment and vacuum complete sets of companies such as Germany Leybold, England Edward, France Alcatel, Japan Vacuum and other companies have entered the Chinese market in large quantities in the fields of electric vacuum industry, vacuum metallurgy, vacuum coating, distillation industry, food industry and aerospace technology. . The vacuum series oil used in conjunction with it has also flooded into the market. Therefore, after the introduction of multinational equipment, it is urgent to select suitable vacuum oil. [0003] With the development of vacuum technology, the requ...

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Problems solved by technology

At present, some additives are added to the vacuum oil, which often affect the vacuum performance of the vacuum oil.

[0005] In addition, a vacuum pump oil is described in the patent publication No. CN1212997A, which has good thermal stability and produces a high ultimate vacuum, which helps to improve low-temperature startability, and specifically provides guarantees in winter and cold regions. It is also a vacuum pump oil that can quickly reach the stable driving state of the vacuum pump. The base oil selected for the vacuum pump oil includes PAO and three types of base oils, and the high temperature resistance and extreme pressure anti-wear performance of the vacuum oil are not explained. At the same time, although the vacuum pump oil By adding antioxidants, the anti-oxidation performance can be improved, but its anti-oxidation performance is limited, and it can no longer meet the needs of the existing high-vacuum pump oil.

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