High oil-resistant accumulator capsule gel

Abstract

The invention discloses high oil-resistant accumulator capsule gel, which is prepared from chloroprene rubber as a main raw material, and nitrile rubber, soft carbon black, an anti-sulfur reducing agent and the like as auxiliary materials according to a certain ratio. Due to addition of the nitrile rubber, the accumulator capsule gel has good oil resistivity; and due to addition of the anti-sulfur reducing agent, the gel has good thermal stability. Compared with the prior art, the accumulator capsule gel for an airplane has the advantages of high tensile strength, good anti-flex cracking property, good thermal stability, stable oil swelling resistance and the like; and the accumulator using the capsule gel is good in oil swelling resistance and long in service life.

Description

technical field [0001] The invention relates to a capsule glue for a pressure accumulator, in particular to a capsule glue for a pressure accumulator with high oil resistance. Background technique [0002] The pressure accumulator is an important component installed in the hydraulic oil supply circuit of the aircraft hydraulic system. Its function is to effectively extend the unloading time of the oil pump and the switching times of the unloading valve, prolong the working life, ensure the stable working pressure of the system, prevent excessive pressure pulsation, and ensure the normal operation of the actuators of the brake system. In addition, in emergency situations such as oil pump failure or pipeline damage, the accumulator can use its stored hydraulic oil to supply the brakes of the locomotive wheels, open and close the emergency hatch of the front cabin, and manipulate the faulty engine to perform propeller feathering and engine rotation. parking. Therefore, pre...

AI Technical Summary

Problems solved by technology

If the pressure accumulator fails, it will increase the number of conversions of the unloading valve and the working time of the oil pump, shorten the working life of both, and increase the oil temperature in the system significantly, increase the hydraulic pulsation, affect the normal work of each actuator, and even directly Threat to flight safety

However, aircraft pressure accumulators generally have problems of external leakage and internal leakage, which directly affect the function of the pressure accumulator

The main reason for this problem is that the hydraulic oil has swelling and cracking effects on the rubber material of the accumulator capsule, which reduces its pressure resistance, and the increase in oil temperature during use will also accelerate the aging of the material

At present, domestic research on rubber materials resistant to aviation hydraulic oil is still immature, and the existing pressure accumulator capsules cannot meet the design requirements of new aircraft in terms of resistance to aviation hydraulic oil and durability.