Manufacturing technology for runner of impulse turbine

A manufacturing process and hydraulic turbine technology, which is applied in the manufacturing process of impact turbine runners, can solve problems such as uneven weight distribution around the water bucket, processing costs for coupling bolt breakage, loose materials, etc., to improve material performance and overall strength, Reduced processing costs and fast molding speed

Active Publication Date: 2015-05-20
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Application Information

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

Method used

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  • Manufacturing technology for runner of impulse turbine
  • Manufacturing technology for runner of impulse turbine
  • Manufacturing technology for runner of impulse turbine

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Experimental program
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Embodiment Construction

[0044] see Figure 1 to Figure 7 , is a preferred embodiment of the manufacturing process of the impact turbine runner, and the process is carried out in the following steps:

[0045] Step 1) manufacture the forging blank of runner:

[0046] 1.1 According to the shape parameters of the runner to be manufactured, use mechanical design software (such as PRO / Engineer WildFire, UG / NX, Catia, etc.) to design the three-dimensional solid shape of the runner.

[0047]1.2 Use finite element analysis technology to analyze the stress, deformation and distribution of the runner during the high-speed rotation of the runner under the impact of the jet. Stress, deformation and its distribution law, see attached image 3 , attached Figure 4 , build the solid model of the runner disc and the connection area between the disc and the water bucket, use the solid model to design the forging blank diagram, and design sufficient machining allowance on the two end faces of the forging blank.

[...

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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...

Claims

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Application Information

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IPC IPC(8): B23P15/00
CPCB23P15/006
Inventor 胡桂川
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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