Ship steam turbine lubricating oil composition

Abstract

The invention relates to a ship steam turbine lubricating oil composition. The ship steam turbine lubricating oil composition is characterized by comprising the following components in weight percent: 0.3-1.5% of antioxidant, 0.03-0.2% of rust inhibitor, 0.03-1% of wear-resistant agent, 0.003-0.1% of demulsifier, 0.001-0.1% of anti-foaming agent, 0.02-0.1% of metal deactivator and base oil in balancing amount. Through a direct liquid rustiness test (synthetic seawater, 24 h), the ship steam turbine lubricating oil composition is rustless; after distilled water is added at 90 DEG C and stirred for half an hour, the direct liquid rustiness test (synthetic seawater, 24 h) is further performed on a separated oil layer, and the ship steam turbine lubricating oil composition is still rustless; the anti-emulsification time in a steam method is less than 180 s; the FZG invalid level is greater than 12; the viscosity level is ISOVG68, anti-foaming performance is less than 65-65-65/0 (mL/mL); air is released for less than 8min; and the TOST oxidation life is longer than 10,000 h.

Description

technical field [0001] The invention relates to a lubricating oil composition, in particular to a marine steam turbine lubricating oil composition suitable for use on a marine steam turbine. Background technique [0002] Limited by the space of the ship's engine room, the volume of the steam turbine and its auxiliary equipment as the main engine of the ship is relatively small. Therefore, higher requirements are put forward for the performance of the ship's steam turbine lubricating oil. The first is the viscosity and extreme pressure performance requirements of the lubricating oil. The speed of the steam turbine is about 4000rpm. After the two-stage reduction gear, the speed is reduced to about 150rpm. The reduction ratio is very large. The viscosity of the lubricating oil is generally ISO VG 68 or ISO VG 100, the extreme pressure performance generally requires no less than 9 grades. The second is the requirement for the anti-rust performance of lubricating oil. Since the ...

AI Technical Summary

Problems solved by technology

The anti-rust agent uses a compound mixture of alkenyl succinic acid / phosphate amine salt. The test shows that if the substance is subjected to a liquid phase corrosion (synthetic seawater) test after being washed with high temperature water, the steel rod will rust and cannot reach the level of marine lubrication. Oil requirements for antirust performance

At the same time, the composition has no demulsifier ingredients, and its anti-emulsification performance is poor

Therefore, the composition cannot meet the lubrication requirements of marine steam turbines

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