Method for processing diamond-shaped hexagonal honeycombs of honeycomb steam seal

Abstract

The invention provides a method for processing diamond-shaped hexagonal honeycombs of a honeycomb steam seal, and is mainly characterized by being a novel method for processing and making the diamond-shaped hexagonal honeycombs of the honeycomb steam seal by adopting numerical control processing center equipment to drill and mill. Numerical control programming is performed according to the sizes of the diamond-shaped hexagonal honeycombs designed and required by technical drawing; uniformly-distributed round blind holes are firstly drilled on a sealing surface of a sealing aluminum ring body by using the numerical control processing center equipment; and a milling cutter with Phi of 1.0 to 1.5 is installed on the continuously-used numerical control processing center equipment to expand and mill uniformly-distributed diamond-shaped hexagonal honeycomb blind holes along the round blind holes according to the drawing sizes. The method has the advantages that: the problem of reduction of a damping effect of the honeycomb steam seal and the like due to small capacity of the round aluminum blind holes by numerical control, large air vortex of the round blind holes and easiness for air to pass through triangle strips among the round blind holes are solved; and the sealing effect of the diamond-shaped hexagonal honeycomb blind holes processed by the honeycomb steam seal is superior to the round blind holes so as to be beneficial for reducing mechanical vibration and ensuring the steadiness of a turbomachine and other equipment.

Description

Technical field [0001] The invention relates to a honeycomb type steam seal diamond-shaped regular hexagon honeycomb processing method. Background technique [0002] Honeycomb seals are used in fields such as steam turbine units, gas turbines, air compressors, and aircraft engines, and are particularly suitable for installation at the end of the turbine shaft, between stages and sections. The inner hole surface of the honeycomb steam seal ring is composed of regular hexagonal small honeycomb blind holes with a regular honeycomb diamond shape, and the thickness of the honeycomb strip is 0.05mm. Honeycomb steam seal is based on the damping phenomenon generated when gas passes through the honeycomb grid to seal. At present, there are three main methods for processing honeycomb gas-sealed regular hexagonal honeycombs, and there are certain problems respectively: one is the method of vacuum brazing stainless steel materials, first processing a 0.05mm thick stainless steel sheet into ...

AI Technical Summary

Problems solved by technology

At present, there are three main methods of manufacturing honeycomb-type steam-sealed regular hexagonal honeycomb, and there are certain problems respectively: one is the method of vacuum brazing stainless steel, firstly process the stainless steel sheet with a thickness of 0.05mm into a regular regular hexagonal honeycomb strip , and then use vacuum brazing technology to braze the honeycomb strip on the inner surface of the parent body seal ring

The volume of the circular blind hole formed by this method is not as large as the volume of the regular hexagonal honeycomb blind hole, the gas vortex formed by the circular blind hole is larger than the gas vortex formed by the regular hexagonal honeycomb blind hole, and a triangular lattice is formed between the circular blind holes, which is easy to Air flow through, these will reduce the sealing effect of the honeycomb seal

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