Over-rotation test piece and over-rotation test piece installation tool and method

By designing the over-rotation test piece of the counterweight block simulates the blade, the problem of high real blade cost in the over-rotation test of the gas turbine engine is solved, and the effect of reducing the test cost and ensuring the reliability of the test is achieved.

CN119984769APending Publication Date: 2025-05-13AECC COMML AIRCRAFT ENGINE CO LTD
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Patent Information

Application Number
CN202311499418.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-11-10
Publication Date
2025-05-13

AI Technical Summary

Technical Problem

In the overturning test of existing gas turbine engines, the use of real blades is relatively expensive and the processing is difficult.

Method used

A super-rotation test piece was designed, including a turbine disc unit, multiple blade units and a stop ring. The blade unit uses a counterweight block instead of the blade body. The tenon is the same as the tenon structure of the real blade, and the weight and centroid position of the counterweight block are the same as that of the real blade.

Benefits of technology

Simulating the blade configuration through the counterweight block reduces the test cost, ensures the true reliability of the test, and prevents the problem of the blade unit falling off during the flip assembly process.

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Abstract

The invention aims to provide an over-rotation test piece, an over-rotation test piece mounting tool and an over-rotation test piece mounting method. The over-rotation test piece comprises a turbine disc unit, a plurality of blade units and a baffle ring. The turbine disc unit comprises a plurality of mortises formed along the disc circumference, the blade units comprise tenons and balancing weights, the tenons and the tenons of real blades are of the same structure, and the weight and the mass center position of the balancing weights are consistent with the blade bodies of the real blades. The tenons of the multiple blade units are installed on the periphery of the turbine disc unit through the mortises in the circumferential direction, and the baffle rings are arranged at one ends of the mortises to limit the tenons to be disengaged from the mortises in the first direction. Through the over-rotation test piece, the test cost of an over-rotation test can be reduced.
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