Manufacturing Technology of Steam Turbine Brush Seal

Abstract

The invention discloses a manufacturing process of a brush type steam seal of a steam turbine. In the process, a layer of adhesive is evenly coated on each layer of metal wires when the brush wire bundle is wound, and each layer of metal wires is bonded to each other by the adhesive. As a whole, when the wound brush filament bundle is cut into brush filament clusters, the metal wires are still bonded together, so that when the inner hole diameter of the brush seal ring is processed, the excess length of the brush filament clusters can be processed in rows. When cutting, it is very convenient to operate, and can ensure the uniform length of the brush filaments, so that the brush filaments are arranged neatly and will not bend, so that the sealing effect of the brush-type steam seal can be effectively improved, thereby improving The efficiency of the steam turbine.

Description

technical field [0001] The invention relates to the field of steam turbine manufacturing, in particular to a manufacturing process of a brush type steam seal of a steam turbine. Background technique [0002] The quality of the seal between the moving and static parts of the steam turbine will be directly related to the efficiency of the steam turbine. At present, the seal rings commonly used in steam turbines mainly include sparse tooth seals, honeycomb seals, and adjustable seals. As long as these traditional rigid seal teeth rub against the rotor, they will wear off quickly, forming permanent leakage channels, and increasing leakage. amount, which will adversely affect the efficiency of the steam turbine. [0003] The brush type steam seal is a new type of flexible seal for steam turbines. Its structure is as follows: figure 1 As shown, the brush type steam seal is composed of a steam seal ring 1 and a wire brush ring, the wire brush ring is stuck in the groove of the st...

AI Technical Summary

Problems solved by technology

[0004] The brush filament cluster 3 is composed of closely arranged stainless steel thin metal wires. The stainless steel fine metal wire has certain elasticity, so when the inner diameter of the brush filament ring is processed to cut off the excess length of the brush filament bundle, it is difficult to ensure that the brush filament The size and length are uniform, and the arrangement of the brush filaments is not neat, disordered, or even bent after processing, which will have an adverse effect on the neat arrangement density of the brush filaments, which in turn will affect the sealing effect of the brush seal

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