Ash-free anti-wear hydraulic lubricating oil composition and preparation method thereof

Abstract

The invention discloses an ash-free anti-wear hydraulic lubricating oil composition and a preparation method thereof. The ash-free anti-wear hydraulic lubricating oil composition consists of the following components in percentage by weight: 0.1-5.0% of an extreme pressure anti-wear reagent, 0.05-2.00% of an antioxidant, 0.01-0.5% of a metal deactivating agent, 0.05-0.1% of an anti-rusting agent, 0.03-0.06% of an emulsification resistant agent, 0.001-0.01% of an anti-foam agent, 0.2-6.5% of a viscosity index improver and 92.0-98.6% of basic oil, wherein the extreme pressure anti-wear reagent issulfurized isobutylene, di-n-butyl phosphate, tricresyl phosphate, phosphorothioate and amino salt derivatives thereof, phosphate and amino salt derivatives thereof, or a mixture of any combination of the components. The preparation method comprises the following steps: putting the antioxidant, the extreme pressure anti-wear reagent, the anti-rusting agent, the metal deactivating agent, the anti-foam agent, the emulsification resistant agent and the viscosity index improver respectively into the basic oil, or mixing additives to prepare a concentrated substance, heating and mixing the concentrated substance with the basic oil at a mixing temperature between 40-90 DEG C for 1-6 hours, and filtering. The ash-free anti-wear hydraulic lubricating oil composition disclosed by the invention isexcellent in high-temperature oxidation resistance, high-pressure wearing resistance and extreme pressure resistance, and specification indexes of GB11118.1 and ISO11158-2009 can be met.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, in particular to a lubricating oil composition used in a hydraulic transmission system, in particular to an ashless anti-wear hydraulic lubricating oil composition. Background technique [0002] Hydraulic oil is the hydraulic medium used in the hydraulic system that utilizes liquid pressure energy. It plays the role of energy transmission, system lubrication, anti-corrosion, rust prevention, cooling, etc. in the hydraulic system. Hydraulic oil can be roughly divided into ordinary hydraulic oil, anti-wear hydraulic oil, low-temperature hydraulic oil, fire-resistant hydraulic oil, clean hydraulic oil, green hydraulic oil (biodegradable hydraulic oil) and other varieties, among which anti-wear hydraulic oil is the most used Hydraulic oil. [0003] Anti-wear hydraulic oil can be divided into ash type (ZDDP type) and ashless type. Gray type anti-wear hydraulic oil has good anti-wear proper...

AI Technical Summary

Problems solved by technology

But when the plunger pump is used, ZDDP will cause corrosion to the copper parts of the plunger pump, which will lead to wear of the plunger pump shaft and rupture of the swash plate

In addition, due to the poor thermal stability of ZDDP, it is easy to generate sludge during the operation of the high-pressure hydraulic system, which will block the filter screen and cause the operation of the hydraulic system to fail.