Surfacing method of 12-percent Cr steel high and middle pressure rotor journal of ultra supercritical steam turbine

An ultra-supercritical and steam turbine technology, applied in the field of surfacing welding, can solve the problems of mechanical adhesion and wear of the rotor journal and bearing surface, friction pair mismatch, etc., to reduce technology dependence, ensure smooth operation, and increase economic benefits.
CN101837501AActive Publication Date: 2010-09-22HARBIN TURBINE +1
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN TURBINE
Publication Date
2010-09-22

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Abstract

The invention relates to a surfacing method, in particular to a surfacing method of a 12-percent Cr steel high and middle pressure rotor journal of an ultra supercritical steam turbine, solving the problem of mechanical adhesive wear of the surfaces of the 12-percent Cr steel high and middle pressure rotor journal and a bearing. The surfacing method comprises the following steps of: firstly, respectively turning a first journal and a second journal of a blank rotor in a groove mode; secondly, carrying out dye inspection on a turning surface; thirdly, assembling the blank rotor to a special surfacing device; fourthly, preheating a surface to be surfaced of the rotor journal; fifthly, surfacing the surface to be surfaced; sixthly, distressing and heating a rotor; seventhly, turning and finishing the surfaced rotor; and eighthly, carrying out nondestructive inspection detection on the finished rotor. The surfacing method is used for surfacing the 12-percent Cr steel high and middle pressure rotor of the ultra supercritical steam turbine.
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Description

technical field

[0001] The invention relates to a surfacing welding method, in particular to a surfacing welding method for a 12% Cr steel high and medium pressure rotor journal of an ultra-supercritical steam turbine. Background technique

[0002] The development of large-scale ultra-supercritical units is an inevitable choice for the development of clean coal power generation technology in my country. It is the most realistic and effective way to improve the thermal efficiency of units, improve environmental protection and optimize the installed structure of thermal power in my country. The 12%Cr steel high and medium pressure rotor is the core component of the ultra-supercritical unit, and a series of difficulties must be overcome in the manufacturing process, especially the journal wear problem. The improved 12%Cr steel and the new 12%Cr steel used for the ultra-supercritical steam turbine rotor When Cr steel is applied to high and medium pressure rotors that require hig...

Claims

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