A self-locking balance weight structure

Abstract

The invention discloses a self-locking balance weight structure, which is characterized in that the balance weight 1 includes a main body 13 and a shoulder 12, the main body 13 is a U-shaped structure, and one end is provided with a shoulder 12, and the shoulder 12 is on the main body In the opening direction of the 13U slot, it protrudes laterally toward both sides; the hanging lug 2 is a ring-shaped structure protruding radially inward on the rotor, and a step 21 is provided on the side of the hanging lug 2, and there are many surroundings on the step 21. Cyclic symmetrical groove 23. Through the cooperation between the end of the main body 13 with the shoulder 12 and the groove 23 on the side of the hanging ear 2, the balance weight 1 is stuck in the groove 23 to prevent the circumferential movement; the protruding structure 12b of the shoulder 12 is stuck in the hanging Above the step 21 of the ear 2, the locking is completed. Compared with the traditional balance weight structure, the invention realizes self-locking by utilizing the elasticity of the shoulder of the T-shaped structure. The structure is simple, the number of parts is small, the cost is reduced, and the structural reliability is improved. The invention avoids opening holes on the rotor, can greatly reduce stress concentration, and improves the service life of the rotor.

Description

Technical field: [0001] The invention belongs to the technical field of gas turbine engines, and in particular relates to a self-locking balance counterweight structure. Background technique [0002] The working principle of a gas turbine engine is to use the heat energy generated by the mixed combustion of compressed air and fuel from the compressor to drive the turbine to rotate at a high speed, and the turbine drives the compressor through the turbine shaft to form a continuous operation. With the increase of the thrust-to-weight ratio of the aeroengine, the rotational speed of the rotor is getting higher and higher, and the unbalance of the rotor system due to its own weight (parts processing, assembly errors, or uneven structure) has more and more influence on the vibration of the engine. bigger. On a high-speed engine, excessive unbalance will cause the rotor to be unstable during operation, and even the rotor and stator will be severely rubbed, which will lead to ser...

AI Technical Summary

Problems solved by technology

[0007] 1. Opening holes on the rotor will cause local stress concentration and reduce the life of the rotor;

[0008] 2. The punching point on the balance weight is locked, the consistency of the depth, position and impact force of the punching point is difficult to guarantee, and the assembly quality consistency is poor

In addition, the impact force will also bring assembly stress to reduce the reliability of the structure;

[0009] 3. It is difficult to decompose the balance weight, and it needs machining to destroy the structure of the punching point, and the pins are taken out with tools, which is poor in manufacturability

[0015] 1. Opening holes on the rotor will cause local stress concentration and reduce the life of the rotor;

[0016] 2. There are many parts attached to the balance weight, and the structure is complicated, which reduces the reliability;

[0017] 3. The assembly and disassembly process of the balance weight is cumbersome and the work efficiency is low

The connection between the balance weight and the rotor needs to be realized through other parts, and the number of parts involved is large, the structure is complex, and the reliability of the parts is poor

When assembling and disassembling the balance weight, machining or tools are required, and the assembly process of the parts is poor

None of the above balanced counterweight structures can meet the requirements of modern engines for long life, high reliability and good assembly process.

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