Ash-free anti-wear hydraulic oil

An anti-wear hydraulic oil, extreme pressure anti-wear technology, applied in the field of lubricating oil, can solve the problems of hydraulic system operation failure, poor thermal stability, corrosion of copper parts of plunger pumps, etc., to meet the requirements of low corrosion and anti-corrosion Abrasive requirements, the effect of good anti-wear performance
CN102719299AInactive Publication Date: 2012-10-10上海福岛新材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
上海福岛新材料科技有限公司
Publication Date
2012-10-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses ash-free anti-wear hydraulic oil. The ash-free anti-wear hydraulic oil consists of the following components in percentage by weight: 92 to 97 percent of base oil, 0.5 to 3 percent of ash-free extreme-pressure anti-wear additive, 0.01 to 2 percent of metal deactivator, 0.01 to 0.05 percent of purification dispersant, 0.1 to 1.0 percent of antioxidant, 0.5 to 1.0 percent of antioxidant preservative, 0.01 to 0.08 percent of antirusting agent, 0.1 to 1.0 percent of viscosity index improver and 0.01 to 0.05 percent of anti-foaming agent, wherein the base oil is steam turbine oil with relatively high oxidation stability and emulsification resistance; the ash-free extreme-pressure anti-wear additive is at least one of S-P-N, S-P and P type ash-free extreme-pressure anti-wear additives; and the purification dispersant is DT-6 sulfurized calcium alkyl phenolate. The ash-free anti-wear hydraulic oil has high wear resistance, oxidation resistance, hydrolytic stability and rust resistance, can meet the requirement of high abrasion resistance of vane pumps, and can also meet the requirement of low corrosivity of plunger pumps.
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Description

technical field

[0001] The invention belongs to the technical field of lubricating oil, and relates to a hydraulic oil, in particular to an ashless anti-wear hydraulic oil. Background technique

[0002] Anti-wear hydraulic oil can be divided into two types: gray zinc type with zinc dialkyl dithiophosphate (ZDDP type) as the main agent, and ashless type (zinc-free) with sulfur, phosphorus, and nitrogen agents as the main agent. Gray zinc anti-wear hydraulic oil has good anti-wear properties and can meet the requirements of vane pumps. But when used in plunger pumps, ZDDP can cause corrosion to the copper parts of the plunger pump, which can lead to worn plunger feet and cracked swashplates. 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. As a branch of hydraulic oil, ashless anti-wear hy...

Claims

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