Aircraft engine propeller stalling mechanism, propeller mechanism and stalling control method

By designing the stop mechanism of the aircraft engine propeller and using the combination of the brake mechanism and the actuation mechanism, the problem of the propeller easily rotating after the turboprop engine is stopped, achieving safe stop and maintenance convenience in the parking state.

CN119686856APending Publication Date: 2025-03-25CHINA HANGFA SOUTH IND CO LTD
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Patent Information

Application Number
CN202411592560.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-08
Publication Date
2025-03-25

AI Technical Summary

Technical Problem

After stopping, the propeller of the existing turboprop engine is prone to rotate due to external factors such as wind force, resulting in maintenance difficulties, potential accidental collisions or engine starting problems.

Method used

An aircraft engine propeller stop mechanism is designed, including a brake mechanism and an actuation mechanism that drives the brake mechanism. The brake mechanism is driven by a hydraulic cylinder or stepper motor, and the friction between the screw sleeve and the brake disc is used to stop the propeller, and the power generated by the spring is maintained in the case of power outage.

Benefits of technology

It effectively prevents the propeller from rotating due to wind and other reasons after parking, ensuring safety and maintenance convenience in parking conditions, and does not affect the normal working function of the propeller.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention discloses an aero-engine propeller stalling mechanism, a propeller mechanism and a stalling control method.According to the aero-engine propeller stalling mechanism, an actuating mechanism rotates, the actuating mechanism drives a lead screw to rotate, rotation of the lead screw is changed into axial displacement of a lead screw sleeve, and a brake disc on the lead screw sleeve is pressed to a movable face together; and then the propeller transmission shaft is locked through the working shaft, and locking of the propeller is completed. Under the condition of power failure, elastic force generated by compression of the first spring on the lead screw sleeve exerts acting force on the brake disc and the lead screw, self-locking of the lead screw and stalling of the propeller are completed, and the problems that blades of the propeller of the turboprop engine rotate after the engine stops and the like are solved.
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