Shaft with supporting, centering and pressurizing functions and gas turbine rotor

Abstract

The invention discloses a shaft with supporting, centering and pressurizing functions and a gas turbine rotor. The shaft sequentially comprises a compressor installation part and a turbine installation part, the turbine installation part includes a turbine support part connected with a turbine, the outer diameter of the turbine support part is larger than that of other parts, adjacent to the turbine support part, of the shaft, and a pressurizing mechanism is arranged on the turbine support part. The shaft with the supporting, centering and pressurizing functions and the gas turbine rotor havethe beneficial effects that the structure and layout are simple, machining is easy, the supporting, centering and pressurizing functions can be achieved through the turbine support part, in the case of consuming a small amount of useful work, the deformation quantity of the rotor is reduced, the probability of collision between rotor parts and stator parts is reduced, the stability of the whole rotor is optimized, and best comprehensive benefits are achieved.

Description

technical field [0001] The invention relates to a shaft structure and a gas turbine rotor adopting the shaft structure, in particular to a shaft structure with support centering and supercharging and a gas turbine rotor adopting the shaft structure. Background technique [0002] At present, most gas turbine rotor stages are connected by end-tooth connection, and the function of end-tooth connection is to realize automatic centering and torque transmission during operation. At the same time, the hollow gap between the mountain-shaped teeth at the meshing position of the end teeth realizes the intake air from the compressor end, and leads to the end of the turbine disk through the gap between the shaft and the turbine disk to cool the turbine disk wall and blades, so as to optimize the rotor stability and Increase the service life of high temperature components. When the rotor speeds up, the bleed air pressure of the compressor is not high and the flow rate is small at low sp...

AI Technical Summary

Problems solved by technology

In the event of minor faults or changes in combustion conditions, gas may flow back from the end, and the turbine discs and blades that lose cooling air flow are likely to rub against the stator under the action of thermal expansion

Moreover, the meshing between the two ends of the teeth is very dependent on the pre-tightening force of the bolts at both ends. When the end teeth are loose or the end teeth are severely worn, the function of the end teeth connection will fail, and the rotor will rub against the rotor when it is running at high speed. , and serious accidents in which the rotor is scrapped

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