Method for repairing micro-arc oxide film oil leakage at seal groove of cylinder body of actuator cylinder of airplane

Abstract

The invention discloses a method for repairing micro-arc oxide film oil leakage at a seal groove of a cylinder body of an actuator cylinder of an airplane. The method comprises the followings steps: disassembling the cylinder body of the actuator cylinder assembly of the airplane; measuring the surface roughness of the micro-arc oxide film at the seal groove of the cylinder body, if the surface roughness reaches Ra 1.6 or above, detecting whether a loose layer is generated on the micro-arc oxide film at the seal groove of the cylinder body or not, and if the loose layer is generated, conducting reparation: (1) wrapping the cylinder body with a layer of soft cloth, and clamping the cylinder body on a three jaw chuck of an electric polishing machine; (2) adsorbing a gauge head and a gauge stand of a dial indicator on the other side of the electric polishing machine, rotating the cylinder body, and keeping the jerk value of the seal groove of the cylinder body to be not more than 0.05; (3) enabling a felt wheel to extend into the seal groove of the cylinder body, adjusting the rotating speed of the felt wheel, and polishing the micro-arc oxide film at the seal groove; (4) measuring the size and the roughness of the polished seal groove of the cylinder body; (5) assembling the polished qualified cylinder body on the actuator cylinder assembly, and conducting seal test detection according to the product design requirements.

Description

technical field [0001] The invention belongs to the technical field of aero-engine manufacturing, and in particular relates to a method for repairing oil seepage in a micro-arc oxidation film layer at a seal groove of an aircraft actuator cylinder. Background technique [0002] The aircraft actuator assembly is a driving device that controls the movement of various control surfaces or other components on the aircraft. For example, the flap actuator is the driving actuator for the flap action. Flying direction; the aileron action cylinder is to operate the aileron to move up and down. These cylinder components themselves have a certain pressure, and the driving process is similar to the spring principle. They are generally made of aluminum alloy and are mainly composed of cylinders, pistons, rear covers and other components. In order to meet the performance of the aircraft actuator assembly in the marine air environment, the inner and outer surfaces of all components of the ...

AI Technical Summary

Problems solved by technology

However, with the prolongation of the service time of the aircraft, the micro-arc oxidation layer of the actuating cylinder components is gradually aging, especially the aging of the micro-arc oxidation layer at the seal groove of the actuating cylinder cylinder is particularly serious, which makes the leakage of the joint surface between the cylinder body and the piston Oil faults occur frequently, and serious safety problems will occur if they are not dealt with in time. In most cases, the only remedy is to replace the actuator assembly. There is no more convenient and economical method at present

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