Dynamic seal structure of wheel-disc transverse teeth of gas turbine

Abstract

The invention provides a dynamic seal structure of wheel-disc transverse teeth of a gas turbine. A circle of ring-shaped boss is arranged at the inner side of the meshing part of end teeth of each matching wheel disc, and a pair of circumferential grooves are formed in an opposite end face. The dynamic seal structure is a circle of seal plate of which two ends are respectively inserted into the opposite circumferential grooves. The seal plate is composed of a plurality of segments of arc-shaped seal plates, L-shaped pinch plates are arranged inward or outward at two ends of each segment of seal plate, and bayonets are arranged on corresponding positions of the circumferential grooves. The seal structure has the characteristics of simple structure and convenience in processing and assembly, and only the circumferential grooves matched with the seal plate are formed in a rotor. The centrifugal force role of the seal plate is applied, so that the seal plate achieves a seal effect along with the increasing of the rotation speed of the rotor. After a unit stops, the clinging force between the seal plate and the rotor disappears, and the seal plate is conveniently disassembled and replaced. The structure adopts a design thought without fasteners, the reliability and the safety of the seal structure are ensured well, and the dynamic seal structure is easy for large-scale promotion and use.

Description

technical field [0001] The invention relates to high-speed rotating equipment such as gas turbines and steam turbines, in particular to a dynamic sealing structure for the end teeth of the gas turbine disc. Background technique [0002] Such as figure 1 , 2 As shown, the connection mode of the turbine disk of the gas turbine is mostly that the impeller 1-1 and the impeller 1-2 are butted through the end face teeth 2, and then axially tightened by the tie rod 3 to form a turbine rotor. In the assembly structure of the face teeth of the gas turbine, when the impeller 1-1 and the end face teeth 2 of the impeller 1-2 are mated, there is an assembly gap between the impeller dedendum 4 and the impeller addendum 5, so that the outside of the end face tooth 2 and its disc The inner chamber communicates directly through this assembly gap. If the gas parameters of the inner chamber of the wheel disc are different from those of the outer gas parameters of the face gear 2, gas leakag...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of complex structure, difficult installation and unreliability of fasteners of traditional sealing components, the present invention provides a dynamic sealing structure

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