With the increasing heaviness and deterioration of crude oil,the rubber swell rate of domestic No.15 aviation hydraulic fluid has been in a marginal state for a long time,potentially posing certain safety risks to the operation of aircraft hydraulic transmission systems.Through a series of experimental studies,it is found that the aromatic content of No.15 aviation hydraulic fluid is the main factor affecting the rubber swell rate,and effective methods for improving the rubber swell rate of the oil product were proposed based on current production processes.(Chart1 Tables7 References3)
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