CN102618365B - Lubricating-oil composition of speed reducing machine in gas turbine for ship - Google Patents

Abstract

A lubricating oil composition for a reducer in a marine gas turbine, the components and content of the composition are: 2-4% of antioxidant, 5-6% of anti-wear agent, 0.1-0.4% of rust inhibitor, metal blunt 0.06-0.08% emulsifying agent, 0.05-0.3% demulsifier, 0.005-0.01% anti-foaming agent, 1-2% oily agent, and the balance is base oil. The notable advantage of this lubricating oil composition is that it has good overall performance, and all performance indicators meet the requirements for use. It is also quite excellent, and it also meets the requirements of marine gas turbines in terms of acid control ability, cleanness and dispersibility, and rubber adaptability, and the base oil is composed of diester and polyol ester with excellent performance to ensure that the base oil has good thermal performance at the same time. Stability, good viscosity-temperature characteristics, excellent low temperature fluidity, low volatility and good lubricity.

Description

Lubricating oil composition for reducer in marine gas turbine

technical field

The invention relates to a lubricating oil composition for a reducer in a marine gas turbine.

Background technique

With the continuous development of gas turbine technology in my country, especially after the introduction of UGT25000 gas turbine technology from Ukraine and the recent introduction of GE's LM2500+G4 series technology for the construction of power stations, the use of gas turbines on ships has become an inevitable development of ship power. However, the development of lubricating oil for reducers in marine gas turbines is still a weak point in my country, and there is no lubricating oil standard for large gas turbines in ships. Therefore, it is of great significance to develop lubricating oil for marine gas turbine reducer.

At present, the lubricating oil system of marine gas turbines in my country is mainly divided into two parts, front and rear, which are designed independently. This is because the front part of the gas generator uses rolling bearings, and the rear power turbine and reducer gear transmission use sliding bearings, and these two parts are essential for lubrication Oil requirements vary considerably. Therefore, it is necessary to develop a lubricating oil suitable for the speed reducer in the marine gas turbine, which is of great significance to economic and social development.

Contents of the invention

The technical problem to be solved by the present invention is to provide an anti-oxidation performance, anti-corrosion performance, anti-wear performance, anti-rust performance, anti-salt spray performance, anti-emulsification and anti-foaming performance, and has good acid control ability, Lubricating oil compositions for gear reducers in marine gas turbines with rubber adaptability and long oil drain intervals.

The present invention solves the above technical problems with the following technical solutions:

A lubricating oil composition for reducers in marine gas turbines, the components and content of the composition are: 2-4% of antioxidant, 5-6% of anti-wear agent, 0.1-0.4% of rust inhibitor, metal 0.06-0.08% passivator, 0.05-0.3% demulsifier, 0.005-0.01% anti-foaming agent, 1-2% oily agent, and the balance is base oil.

The base oil of the lubricating oil composition is a compound of polyalphaolefin (PAO) and pentaerythritol ester, which account for 40-45% and 55-60% by mass respectively.

The antioxidant of the lubricating oil composition is 40-50% by mass of phenyl-α-naphthylamine and 50-60% of 3.5-di-tert-butyl-4-hydroxyl oxidized cinnamic acid alkyl (C ₇ , C ₉ branched) ester or butyl octyl diphenylamine or thiazepine compound.

The anti-wear agent of the lubricating oil composition is compounded with 40-60% of di-n-butyl phosphite and 40-60% of aminosulfide in mass percent.

The metal deactivator of the lubricating oil composition is compounded with 30-70% of thiadiazole derivatives and 30-70% of alkyl diphenylamine in mass percent.

The anti-rust agent of the lubricating oil composition is composed of 60-70% of benzotriazole, 15-20% of sodium petroleum sulfonate, and 15-20% of dodecenyl succinate by mass percentage. Compounding agent.

The demulsifier of the lubricating oil composition is a composite agent of a propylene oxide/ethylene oxide copolymer and a condensation product of an amine and ethylene oxide, and the composite agent is compounded at a mass ratio of 1:1.

The antifoaming agent of the lubricating oil composition is a homopolymer of methacrylate.

The oily agent of the lubricating oil composition is compounded with 45-55% of oleic acid glycol fat and 45-55% of benzotriazole fatty amine grease in mass percent.

The significant advantages of the reducer lubricating oil in the marine gas turbine of the present invention are:

1. The comprehensive performance of the lubricating oil composition of the present invention is good, and each performance index all meets the use requirements. Specifically, it not only has good anti-oxidation, anti-corrosion, and anti-wear properties, but also has excellent anti-rust, anti-salt spray, anti-emulsification, and anti-foam properties. The requirements for the use of marine gas turbines are applicable to the lubrication of reducers in marine gas turbines.

2. The base oil is selected from the compound synthetic base oil of diester and polyol ester with excellent performance to ensure that the base oil has good thermal stability, good viscosity-temperature characteristics, excellent low-temperature fluidity, low volatility and good Lubricity.

Detailed ways

Specific examples of the reducer lubricating oil composition in the marine gas turbine are as follows:

Example 1:

The sum of the above components is 100%.

Example 2:

Blend the following components by mass percentage:

The sum of the above components is 100%.

Example 3:

The following components by weight percentage are reconciled and made:

The sum of the above components is 100%.

Table 1 is the specific test result to the physical and chemical properties of the product of embodiment 1:

Table 1

Claims (1)

1. boats and ships are with step-down gear lubricating oil composition in the internal combustion turbine, it is characterized in that composition component and content are by mass percentage: oxidation inhibitor 2～4%, anti-wear agent 5～6%, rust-preventive agent 0.1～0.4%, metal passivator 0.06～0.08%, emulsion splitter 0.05～0.3%, kilfoam 0.005～0.01%, oiliness improver 1～2%, surplus are base oil;

Wherein:

Base oil is the compound of poly-alpha olefins PAO and pentaerythritol ester, accounts for respectively mass percent 40～45% and 60～55%;

The oxidation inhibitor mass percent is that butyl octyl pentanoic or the sulphur naphthazin(e) of 40～50% phenyl-a-naphthylamine and 60～50% is composite;

Anti-wear agent is to be that 40～60% di-n-butyl phosphite and 60～40% amino sulfuration esters are composite with mass percent;

Metal passivator is that mass percent is that 30～70% thiadiazoles derivative and 70～30% alkyl diphenylamines are composite;

Rust-preventive agent is to be that petroleum sodium sulfonate, 20～15% the dodecenylsuccinic acid ester of 60～70% benzotriazole and 20～15% is composite by mass percentage;

Emulsion splitter is the recombiner of the condenses of the multipolymer of propylene oxide/oxyethane and amine and oxyethane, and recombiner is composite by 1 ︰, 1 mass ratio;

Kilfoam is the homopolymer of methacrylic ester;

Oiliness improver is to account for mass percent 45～55% oleic acid glycol esters and 55～45% 124 Triazole fatty amine salts are composite.