Welding technology method for assembling large length-width ratio hollow type fixed guide vane of large-scale hydroturbine

A fixed guide vane, assembly and welding technology, applied in the direction of welding equipment, manufacturing tools, arc welding equipment, etc., can solve the problems of large operating space, difficult to control welding deformation, and great influence of seat ring assembly welding, etc., to save operating space , Solve the problem of operating space and welding deformation, solve the effect of operating space utilization and welding deformation control

Inactive Publication Date: 2015-05-20
HARBIN ELECTRIC MASCH CO LTD
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AI Technical Summary

Problems solved by technology

At present, the steel plate welding structure is used to fix the guide vane. The petal body is made of steel plate and cold-pressed. It needs to be assembled and fixed with a special mold during assembly and welding. It needs to occupy a large operating space, and the welding deformation is very difficult to control. Subsequent Seat ring assembly and welding have great influence

Method used

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  • Welding technology method for assembling large length-width ratio hollow type fixed guide vane of large-scale hydroturbine

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Embodiment Construction

[0034] Such as figure 1 As shown, the present invention provides a reasonable and concise process flow, high structural strength, small operating space, effective control of welding deformation and can be used for assembly and welding of large-scale hydraulic turbines with large aspect ratio hollow fixed guide vanes. The specific implementation of the present invention The way is:

[0035] 1) The upper petal body of the first fixed guide vane 2, the lower petal body of the first fixed guide vane 1, the rib plate of the first fixed guide vane 3 Cutting material: the material is Q345 steel plate, and flattened after cutting, so that the flatness of the steel plate is not greater than 3mm, the first fixed guide vane upper petal body 2 and the first fixed guide vane lower petal body 1 are formed by cold pressing technology, the first fixed guide vane upper petal body 2, the first fixed guide vane lower petal body 1, the first fixed guide vane lower petal body 1 The length and thi...

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Abstract

The invention relates to a welding technology method, in particular to a welding technology method for assembling a large length-width ratio hollow type fixed guide vane of a large-scale hydroturbine. The fixed guide vane is made by welding an upper clack body, a lower clack body and a reinforcing plate, the technology method solves the critical technology problem of the large length-width ratio hollow type fixed guide vane by a technology process of split charging, stack charging, stack welding, annealing and splitting, the technology method for assembling and welding the large length-width ratio hollow type fixed guide vane of the large-scale hydroturbine has the advantages that the production cost is low, the welding technology process is reasonable and simple, the strength of a structure can be improved, the operating space is saved, and the quality of a product is improved.

Description

Technical field: [0001] The invention relates to an assembly and welding process method of a large-scale water turbine with a hollow fixed guide vane with a large aspect ratio. Background technique: [0002] For the fixed guide vane of the seat ring of a large turbine, the welded structure of the petal body can reduce the weight and cost compared with the integral cast fixed guide vane, and the economic benefit is considerable. At present, the steel plate welding structure is used to fix the guide vane. The petal body is made of steel plate and cold-pressed. It needs to be assembled and fixed with a special mold during assembly and welding. It needs to occupy a large operating space, and the welding deformation is very difficult to control. Subsequent Seat ring assembly and welding have a greater impact. Invention content: [0003] The invention provides a technological process with reasonable and concise technological process, high structural strength, small operating sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173
CPCB23K9/173
Inventor 吕胜海乔宏来邱希亮闫海滨田井成
Owner HARBIN ELECTRIC MASCH CO LTD
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