Combination circulation steam turbine lubricating oil composition

Abstract

The invention relates to a combined-cycle gas turbine lubricant combination which is suitable to be used in a large-scale gas steam combined-cycle gas turbine, and the composition and content of the combined-cycle gas turbine lubricant combination by weight percentage of antioxidant of 0.1 to 2 percent, anti-wear agent of 0.01 to 1 percent, no gray rust-proof agent of 0.01 to 1 percent, metal deactivating agent of 0.01 to 1 percent, anti-foam agent of 0.001 to 1 percent, the allowance is based oil, which is Class II or Class III paraffin-based oil, and the sulfur content is less than 0.03 percent, the lubricant combination of the invention has an extremely long induction period of oxidation and excellent performance of high temperature oxidation, excellent extreme pressure antifriction property and corrosion, good water separation, air separation and filterability, and can well meet the lubricating demand of large-scale combined cycle gas turbine.

Description

technical field [0001] The invention relates to a combined cycle steam turbine lubricating oil composition suitable for a large gas-steam combined cycle steam turbine unit. Background technique [0002] The steam turbine oil used in the gas-steam combined cycle system needs to meet the lubrication requirements of both the gas turbine and the steam turbine, so higher requirements are placed on the performance of the steam turbine oil. First of all, the lubricating oil used in the combined cycle unit needs to have excellent high temperature oxidation and corrosion resistance. Since the initial gas temperature of the gas turbine is above 1200°C, the temperature of its bearings can reach 120°C. High temperature conditions directly affect the oxidation rate of oil products. At the same time, the output power of the steam turbine / the volume of the oil tank is constantly increasing, that is, the circulation coefficient of the steam turbine oil is constantly increasing, all of which...

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Problems solved by technology

The oil sludge produced by oxidation has many hazards to the normal operation of the steam turbine unit. For example, the oil sludge blocks the filter screen of the pump suction port, causing cavitation in the pump; the oil sludge sticks to the control valve, causing control deviation, and in severe cases, it will cause the control valve to lock. ;Oil sludge can also be deposited on the bearing surface to increase its temperature and cause equipment damage

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