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Runner leak stoppage device for high-head hydrogenerator

A hydroelectric generator and high water head technology, applied in hydroelectric power generation, engine components, machines/engines, etc., can solve problems such as not being able to meet the requirements of the runner to prevent leakage, affecting the performance of the runner, increasing the water thrust, etc., and achieving structural Simple, high generator efficiency, balanced water thrust effect

Inactive Publication Date: 2010-08-11
TIANJIN TIRNFR HEAVY HYDROELECTRIC FRCILITY CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the two anti-leakage devices for mixed-flow runners with high water head in power stations cannot meet the leak-proof requirements of the runners, because the higher the water head, the greater the pressure, the greater the water leakage, and the greater the water thrust, which will affect the performance of the runners and cause the unit to vibrate

Method used

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  • Runner leak stoppage device for high-head hydrogenerator
  • Runner leak stoppage device for high-head hydrogenerator
  • Runner leak stoppage device for high-head hydrogenerator

Examples

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Embodiment 1

[0012] Embodiment 1 A leak-proof device for the runner of a high-head hydroelectric generator, which is a combined leak-proof device. The upper crown and the lower ring of the runner have comb teeth, and the comb teeth 2 of the upper crown of the runner are equipped with comb teeth on the top cover. 1. The lower ring comb teeth 7 are relatively equipped with the bottom ring comb teeth 8 . The junction between the runner, the top cover and the bottom ring is a semi-labyrinth leak-proof structure. The semi-labyrinth leak-proof structure of the runner and the top cover is the assembly method of the top cover leak-proof ring 4 and the runner labyrinth ring 3, and the semi-labyrinth leak-proof structure of the runner and the bottom ring is the bottom ring leak-proof ring 6 and the lower labyrinth ring 5 assembly methods.

[0013] In this embodiment, the anti-leakage device for the runner of the high-water turbine generator adopts a combined anti-leakage method. The upper crown and...

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Abstract

The invention relates to a runner leak stoppage device for a high-head hydrogenerator, belonging to the technical field of hydrogenerators. The runner leak stoppage device for the high-head hydrogenerator has the characteristics that runner leak stoppage is a combined type leak stoppage device; an upper crown and a lower ring of the runner are provided with comb teeth; and a semi-maze type leak stoppage structure is arranged on the joint position of the runner, a top cover and a bottom ring. The device has the advantages of simple structure, convenient use, stable performance, evident leak stoppage effect, smooth runner operation, high generator efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of hydroelectric generators, and in particular relates to a leakage prevention device for a runner of a high water head hydroelectric generator. Background technique [0002] At present, the Francis runner is an important component for converting hydraulic energy into mechanical energy. Most of the water flowing from the water guide mechanism will be discharged through the draft tube after the runner does work, and a small part will be discharged through the draft tube after the runner does work, but a small part will pass through the upper crown and the neck cover. Leakage between the space and the gap between the lower ring and the bottom ring will cause volume loss. In order to reduce this part of the loss, a leak-proof device is usually installed. For mid- and low-head Francis turbines, a gap leak-proof device is usually used, and labyrinth rings 10 and 11 with grooves are respectively placed on the upp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B3/00F16J15/447
CPCY02E10/223Y02E10/20
Inventor 张志斌贾乃华陈红
Owner TIANJIN TIRNFR HEAVY HYDROELECTRIC FRCILITY CO LTD
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