Laser cladding structure of steam turbine blade air inlet side

A technology for steam turbine blades and laser cladding, which is applied to the supporting elements of blades, mechanical equipment, engine elements, etc., can solve the problems of easy water erosion and failure of the cladding layer, save production energy and production time, and save cladding metal powder. , Reduce the effect of blade deformation
CN104533539AInactive Publication Date: 2015-04-22WUXI TURBINE BLADE
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
WUXI TURBINE BLADE
Publication Date
2015-04-22
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention provides a laser cladding structure of a steam turbine blade air inlet side. The problem that according to an existing steam turbine blade steam inlet side laser cladding slope structure, longitudinal sections are the same, so that cladding layers close to the blade tops on the blade longitudinal sections can be subjected to water erosion easily and lose efficacy can be solved. Accordingly, the anti-water-erosion capacity of a blade steam outlet side laser cladding layer is improved, and the service life of a steam turbine blade is prolonged. The structure comprises a laser cladding layer. A cladding slope which extends from the blade top to the blade root is formed in one side of the air inlet side of the steam turbine blade, and the laser cladding layer is arranged in the cladding slope in a cladding mode. The laser cladding structure is characterized in that the width and the thickness of the longitudinal section of the laser cladding layer are reduced gradually to zero from the blade top to the blade root, the length L of the laser cladding layer is 200 mm-900 mm, and the width and the thickness of the longitudinal section of the laser cladding layer are determined by the cladding slope structure.
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Description

technical field

[0001] The invention relates to the technical field of steam turbine blade processing, in particular to the field of laser cladding of the inlet edge of the steam turbine blade, in particular to the laser cladding structure of the inlet edge of the steam turbine blade. Background technique

[0002] The last-stage blade of the steam turbine operates in a relatively high steam humidity environment, and the blade tip suffers cavitation failure during high-speed rotation. Therefore, the water erosion resistance of the blade directly affects the service life of the turbine blade and the safe operation of the unit. The traditional anti-corrosion strengthening method is to use brazing Stellite alloy sheet on the inlet edge of the steam turbine blade. The thickness of the alloy sheet is 0.8~1.5mm and the thickness of the alloy sheet is uniform. However, the position of the inlet edge has different requirements for water erosion resistance. In the case of the same thi...

Claims

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