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Impact type water bucket fine welding sectioning method and structure

An impact type and bucket technology, which is applied in the field of fine welding split method and structure of impact type bucket, can solve the problems of large alternating stress amplitude of impact type runner, broken bucket of casting bucket and fatigue damage, etc. The effect of reducing production difficulty, improving strength and ensuring reliability

Inactive Publication Date: 2019-11-15
浙江富春江水电设备股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The impact runner is subject to a large amplitude of alternating stress, which is prone to fatigue damage. In history, casting water buckets in many power stations have broken buckets

Method used

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  • Impact type water bucket fine welding sectioning method and structure
  • Impact type water bucket fine welding sectioning method and structure
  • Impact type water bucket fine welding sectioning method and structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] An impact type water bucket precision welding split structure, such as figure 2 As shown, it includes a disk 1 and several water buckets 2 which are independently provided with the disk 1 , and the water buckets 2 are arranged equiangularly around the outer circumference of the disk 1 . like image 3 As shown, the outer circumference of the disc 1 is provided with a disc welding part 1a corresponding to each bucket 2, the disc welding part 1a protrudes from the outer circumference of the disc 1, and the inner side of the water bucket 2 is provided with a disc welding part 1a The matching bucket welding portion 2a, the inner side of the bucket 2 is welded and fixed to the disk welding portion 1a on the outer periphery of the disk 1 through the bucket welding portion 2a.

[0042] like Figure 4 As shown, an arc-shaped end welding surface 12 is provided on the outer side of the disc welding part 1a, and parallel side welding surfaces 11 are respectively provided on both...

Embodiment 2

[0044] The difference between embodiment 2 and embodiment 1 is that, as Figure 8 As shown, the outer side of the disc welding part 1a is provided with a disc welding plane 101, such as Figure 9 As shown, the water bucket welding part 2a is provided with a water bucket welding plane 201 matched with the disc welding plane 101, the water bucket 2 is provided with an inward depression, and the depression of the water bucket 2 is arc-shaped, and the water bucket welding plane 201 is located at the bottom of the water bucket. At the bottom of the depression of bucket 2, the structure after the two are welded is as follows Figure 10 As shown, the weld 3 is a straight line or close to a straight line, and the weld between the water bucket 2 and the disc 1 is close to the bottom of the depression of the water bucket 2, which effectively reduces the amount of welding and ensures welding economy.

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Abstract

The invention discloses an impact type water bucket fine welding sectioning method and structure. The method comprises the following steps that a, a region with relatively low stress is found betweena water bucket and a disc, and a forged welding boundary is drawn in a low stress area; b. a disc is produced through forging and carrying out acceptance inspection; c, the machining allowance of thedisc is reserved according to the deformation amount possibly generated by surfacing and heat treatment, and rough machining of the forging disc is completed; d, each water bucket forging blank is manufactured, the machining allowance of the water bucket is reserved, and rough machining work of the independent water bucket is completed; e, the rough machining water bucket is welded on the rough machining disc; and f, stress removal heat treatment is performed after finish welding, and finish machining is performed after the flaw detection is qualified. The invention aims to provide the impacttype water bucket fine welding sectioning method and structure which can reduce forging difficulty and meet the manufacturing capability requirements of existing forging equipment.

Description

technical field [0001] The invention belongs to the field of water turbines, and in particular relates to a split method and structure of an impact type water bucket by precision welding. Background technique [0002] The impact runner is subject to a large amplitude of alternating stress, which is prone to fatigue damage. In history, many casting water buckets in power stations have broken bucket accidents. At present, the main production method of the runner of the impact unit is forging plus CNC machining. This processing method basically has no material defects, and the power station has good feedback from the operation. It is now the main production method of the impact runner. [0003] The material of the runner is stainless steel, and the forging resistance is too large. The largest forging performance in China is less than 40 tons of forging blanks, and the diameter does not exceed 4 meters. At present, the single-unit capacity of the largest impact turbine in China...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00F03B1/02
CPCB23P15/00F03B1/02Y02E10/20Y02P70/50
Inventor 熊建军沈钊根张续钟邵保安龚芹炬杨希华沈丹任尚洁陈璨杨柯马建峰
Owner 浙江富春江水电设备股份有限公司
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