Steam turbine lubricating oil composition with low greasy filth

Abstract

The invention belongs to the technical field of steam turbine lubrication, and is a low-sludge steam turbine lubricating oil composition. 0.03% to 0.2% antirust agent compounded with derivatives, 0.001% to 0.1% antifoaming agent, 1% to 20% polyether, and base oil as the balance. The advantages of the present invention: excellent high temperature resistance and oxidation resistance, in the Dry-TOST test at 120°C, the oxidation life of the remaining rotary oxygen bomb rate of 25% is at least 500 hours, the rotary oxygen bomb is more than 900 minutes, and the TOST oxidation life is more than 10000 Hours; very little sludge formation tendency, in the Dry-TOST test at 120°C, the sludge formation is less than 60mg/kg when the remaining rotary oxygen bomb rate is 25%, and the sludge formation is less than 200mg after TOST test 1000h; the composition can be very good Meet the lubrication requirements of steam turbines and gas turbines with low oil sludge requirements.

Description

technical field [0001] The invention belongs to the technical field of steam turbine lubrication, and relates to a lubricating oil composition, in particular to a low-sludge steam-turbine lubricating oil composition, which is suitable for use in steam turbines, gas turbines and large gas-steam combined cycle units. thing. Background technique [0002] Because the initial gas temperature of the gas turbine can be as high as 1200℃, the oil temperature is about 50℃~95℃, and the maximum oil temperature at the bearing is about 120℃. The continuous increase in the volume of the fuel tank, that is, the continuous increase in the circulation coefficient of the turbine oil, requires the turbine oil to have a long anti-oxidative life under high temperature conditions. Secondly, the sludge problem is a common problem in the operation of steam turbines. The steam turbine is affected by external factors during operation, such as high temperature, water, air, steam, dust particles, etc....

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Problems solved by technology

[0018] The disadvantages of this patent are that the sludge formation tends to be faster, the high temperature resistance and oxidation resistance are slightly poor, or it is difficult to meet the above two points at the same time.

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