Maintenance and detection method of propeller hub sealing surface of turboprop aircraft

Abstract

The invention discloses a deep repairing method for a turboprop airplane propeller hub sealing face, and relates to a repairing method for an airplane propeller. The method comprises the steps that the damaged area of the propeller hub sealing face of the propeller is subjected to magnetic powder inspection and thermal damage examination to be removed, the damage removed area on the propeller hubsealing face is subjected to hypersonic flame spraying, a high-precision five-axis coordinate grinding machine is used for grinding the thermal spraying area, and a self-made special clamp is adoptedfor completing accurate positioning of a propeller hub before grinding machining; the propeller hub face machined by the grinding machine is subjected to magnetic powder inspection to be ensured of being free of cracks, the propeller hub face machined by the grinding machine is subjected to Barkhausen thermal damage examination to ensure that no grinding thermal damage is produced in the thermal spraying area, and a reassembled hub assembly is subjected to temperature tolerance testing and leakage testing. The technical monopoly of OEM (original equipment manufacturer) is broken through, the technical barrier is broken through, and the core technology is grasped.

Description

technical field [0001] The invention belongs to the technical field of aerospace and relates to a method for repairing an aircraft propeller, more specifically, a method for maintaining and detecting the sealing surface of a propeller hub of a turboprop aircraft propeller. Background technique [0002] The propeller used by Xinzhou 60 aircraft (English: ModernArk60, English abbreviation MA60) manufactured by Xi'an Aircraft Industry (Group) Co., Ltd. is a turboprop propeller manufactured by Hamilton Company of the United States (see figure 1 ). Among them, the propeller hub is forged from high-strength alloy steel, and there is a variable pitch actuator driven by lubricating oil inside the propeller hub. [0003] Under the action of the control system, the variable pitch actuator can adjust the pitch angle of the blades within a certain range, so that the propeller and the engine can be kept running at high efficiency. At the same time, when the aircraft is in the landing b...

AI Technical Summary

Problems solved by technology

The CMM (Component Maintenance Manual) manual stipulates that the repair must be returned to the foreign original equipment manufacturer (Original Equipment Manufacture, abbreviated as OEM). The above-mentioned existing repair method has a long repair cycle and high cost, which has caused great inconvenience to domestic customers.

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