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details There are three types of aviation hydraulic fluids:
1Plant-based hydraulic oilIt is a mixture of castor oil and ethanol and has a distinct alcoholic odor。To aid in identification, the oil is tinged with dark blue。针对...Rubber products are suitable for plant-based hydraulic oil, such aviation hydraulic oil.Began to be used for older air travel。
3Phosphate ester based hydraulic oilYes, no, no, no. Petroleum-based, man-made hydraulic fluid。The fire protection characteristics are particularly good, and this kind of hydraulic oil is sprayed into the electric welding flame at 6000 ° C to carry out the fire protection test, which is not easy to ignite continuously, and sometimes flash will appear。It was introduced in 1948 for use in well-performing piston engine and turboprop aircraft。The hue of the phosphate-based hydraulic oil is blue-purple, with good ultra-low temperature working characteristics and low corrosion, and is now widely used in the hydraulic system software of contemporary military transport aircraft。
When refueling the hydraulic system software, these three kinds of aviation hydraulic oil are not allowed to be mixed, otherwise it will cause damage to the hydraulic system software, resulting in hazardous accidents。The type of aviation hydraulic oil required in the airport maintenance guide or in the instructions for the use of the application tank or accessories shall be followed。
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