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
CN110449832AInactive Publication Date: 2019-11-15浙江富春江水电设备股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
浙江富春江水电设备股份有限公司
Publication Date
2019-11-15
Estimated Expiration
Not applicable · inactive patent

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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.
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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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