Steam sealing structure for steam turbines and assembling method thereof

Abstract

The invention provides a steam sealing structure for steam turbines. The steam sealing structure for steam turbines comprises a peripheral T-shaped slot, a steam sealing strip, a packing strip and a locking strip, wherein the steam sealing strip and the locking strip are arranged in a longitudinal clamping slot of the peripheral T-shaped slot, a first transverse elbow is clamped in a first transverse clamp slot, and a second transverse elbow is clamped in a second transverse clamp slot; and the packing strip is arranged between the steam sealing strip and the locking strip, the lower end of the locking strip is formed into a bent edge, and the bent edge is pressed on the lower surface of the packing strip. According to the steam sealing structure for steam turbines, the packing strip is arranged between the steam sealing strip and the locking strip, and through the packing strip, the steam sealing strip can be tensioned and tightly clamped in the peripheral T-shaped slot in the axial direction; and meanwhile, the bent edge formed at the lower end of the locking strip is pressed on the lower surface of the packing strip, so that the packing strip can be tightly compressed in the radial direction, in such a way, the steam sealing strip can be tightly fixed in the peripheral T-shaped slot, therefore, the occurrence of moving of the steam sealing strip can be effectively prevented, the assembling quality of the steam sealing strip can be ensured, and the operating stability and reliability of a steam turbine can be effectively improved.

Description

technical field [0001] The invention relates to the field of steam turbine assembly, in particular to a steam seal structure used for preventing steam leakage between the steam turbine and the static turbine, and an assembly method of the steam seal structure. Background technique [0002] The steam turbine is a rotary power machine that converts the energy of steam into mechanical work. After the steam from the boiler enters the steam turbine, it passes through a series of annular nozzles and movable blades in sequence to convert the thermal energy of the steam into the mechanical energy of the rotation of the turbine rotor. In the steam turbine, the energy of steam is converted in different ways, thus constituting the steam turbine with different working principles. It consists of two aspects, the rotating part and the stationary part. The rotor includes the main shaft, impeller, moving blade and coupling, etc., and the stator includes the steam inlet part, the cylinder, ...

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Problems solved by technology

[0006] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a steam turbine seal structure, which is used to solve the problem of easy displacement of the seal sheet in the prior art

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