A portable machining tool for temporarily replacing a steam seal tooth of a steam turbine product and a method of use

CN122252702APending Publication Date: 2026-06-23HARBIN TURBINE +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN TURBINE
Filing Date
2026-05-18
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing methods for machining and replacing steam seal teeth suffer from poor portability, low machining accuracy, insufficient efficiency, and lack of versatility. They cannot meet the high-efficiency and precise operational requirements for temporary replacement at steam turbine sites, and the replacement cost is also high.

Method used

A portable machining fixture for temporary replacement of steam seal teeth in steam turbine products was designed. It includes components such as a base frame, slider, rotary file, positioning wheel adjustment block, pulley, pressure block, and dial indicator mounting block. By adjusting the positioning wheel spacing and pulley position, stability is ensured. Combined with the feed control of the adjusting screw, precise milling is achieved.

Benefits of technology

This enables efficient and precise on-site replacement of steam turbine seal teeth, reducing labor and replacement costs and improving operational efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

A portable processing tool for temporarily replacing the steam seal tooth of a steam turbine product and a use method, relates to the steam turbine processing technical field. In order to solve the problems of poor portability, low processing precision, insufficient efficiency, lack of universality and other outstanding problems in the existing steam seal tooth processing replacement mode, which cannot effectively meet the efficient and accurate operation requirements of the steam turbine site temporary replacement of the steam seal tooth, and the replacement cost is higher. In the process of use, the interval between the two positioning wheels on the right and left of the positioning wheel adjusting block is adjusted according to the interval between the adjacent blades, and the groove of the pulley is ridden on the steam seal piece at the same time, the front and rear pulleys are required to be connected with the body of the steam seal piece to be processed, then the adjusting screw is adjusted, the cutter head of the rotating file is contacted with the steam seal piece, and then the feed amount of the cutter head is set and adjusted through the adjusting screw, so that the steam seal tooth of the steam seal piece can be milled. The present application is suitable for replacing the steam seal piece in the steam turbine.
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