Manufacturing technology for runner of impulse turbine

Abstract

The invention discloses a manufacturing technology for a runner of an impulse turbine. The manufacturing technology comprises the following steps that a forged blank of the runner is manufactured, wherein three-dimensional solid modeling of the runner is conducted, solid models of a runner disk and the connection area between the disk and a bucket are established, stainless steel for making the runner is refined, a steel ingot is cast, the runner disk and the connection area between the disk and the bucket are forged, normalizing and tempering are conducted, and then the forged blank is obtained; mechanical rough machining is conducted on the forged blank until the size precision and the surface roughness meet the requirements of fine machining; robot overlaying is conducted on the workpiece in the shape of a bucket; mechanical fine machining is conducted on the workpiece, and then the finished runner is obtained. By the adoption of the manufacturing technology, the material performance and the overall strength of the runner of the impulse turbine are improved, the performance of the runner of the impulse turbine is improved, the service life of the runner of the impulse turbine is prolonged, and the production cost of the runner of the impulse turbine is reduced.

Description

technical field [0001] The invention relates to the field of impact water turbine manufacturing, in particular to a manufacturing process for the impact water turbine runner. Background technique [0002] The runner of the impact turbine is the core component of the impact turbine of the hydropower station with high water head and ultra-high head. During its operation, the runner rotates at a high speed under the impact of the jet, and the impact of the jet on the bucket of the runner is the same as that of the jet and the water. The relationship between the relative positions of the buckets is very close. During the rotation of the bucket, the jet flows from entering the bucket to flowing out of the bucket. The impact force and impact area on the bucket change with the relative position of the jet and the bucket. The combined action of the impact of the impact and the centrifugal force of high-speed rotation makes the stress of the runner a nonlinear variable stress. In or...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of loose casting materials, easy fracture of welding parts, uneven weight distribution of bucket circumference, risk of breakage of connecting bolts and high processing cost in the manufacturing method of impact turbine runner in the prior art. Provides a manufacturing process for a runner of an impact turbine, which improves the material performance and overall strength of the runner of the impact turbine, increases the performance and service life of the runner of the impact turbine, and reduces the production cost of the runner of the turbine

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