Ultra-low specific speed mixed-flow type turbine

A low specific speed, water turbine technology, applied in the direction of impact engine, reaction engine, hydroelectric power generation, etc., can solve the problems of low efficiency and complex structure

Inactive Publication Date: 2009-07-15
NANJING XINGFEI COOLING EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides an ultra-low specific speed Francis turbine, which solves the tech...

Method used

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  • Ultra-low specific speed mixed-flow type turbine
  • Ultra-low specific speed mixed-flow type turbine
  • Ultra-low specific speed mixed-flow type turbine

Examples

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing description, the present invention is described in further detail:

[0017] Such as figure 1 As shown, an ultra-low specific speed Francis turbine includes a water-inlet metal volute 1, a seat ring 2, a negative curvature guide vane 3, a low specific speed turbine runner blade 4, and a low specific speed turbine runner lower ring 5 , low specific speed water turbine runner upper crown 6, cover plate 7, bearing housing 8, main shaft 9, buttress 10, water collecting pan 11, tapered draft tube 12; metal volute 1 and seat ring 2 are welded together connected, and placed on the pier 10, and fixed by welding; the seat ring 2 is connected with the conical draft tube through the water collecting pan 11, and the connection method between the three is bolted. The rotating part of the water turbine consists of the low specific speed water turbine runner blade 4, the low specific speed water turbine runner lower ring 5, the low specif...

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Abstract

An ultra-low specific speed mixed-flow turbine relates to a mixed-flow turbine and belongs to the technical field of energy and power. A main shaft in the invention is arranged on a bearing support, and the bearing support is arranged in the middle of the upper side of a cover plate; the lower side of the cover plate is provided with the runner crown of a low specific speed turbine; the end of the cover plate is fixedly connected with a seating ring; the runner band of the low specific speed turbine is relatively arranged below the runner crown of the low specific speed turbine; one end of the runner band of the low specific speed turbine is connected with the seating ring, and the other end is connected with a conical draft tube; a metal scroll casing is connected outside the seating ring and is arranged on a rest pier; 16 to 18 single-row annular negative camber guide vanes are arranged on the seating ring, and the runner blades of the low specific speed turbine are arranged inside the inner cavity between the runner crown of the low specific speed turbine and the runner band of the low specific speed turbine. The invention solves the technical problem that low specific speed mixed-flow turbine has low efficiency and complicated structure in the prior art.

Description

technical field [0001] The invention relates to a Francis water turbine, which belongs to the technical field of energy and power. Background technique [0002] Conventional water turbines and generators are used to form hydroelectric generator sets to generate electricity, but as prime movers, water turbines can also be used to drive other machinery. With the development of production, they are used more and more in other fields. Currently, they are used in drainage, irrigation and water supply. , chemical industry, fire protection, textile, petroleum, agricultural product processing and other industries are increasingly used. Non-power generation turbines are quite different from conventional turbines in terms of specific speed, working parts, structure, and certain operating parameter requirements. These differences result in different water flow movements and different design methods in the turbines. At present, there is a lack of research on this ultra-low specific spe...

Claims

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Application Information

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IPC IPC(8): F03B1/00F03B3/12
CPCY02E10/223Y02E10/20
Inventor 周大庆郑源顾星康屈波徐峰张丽敏
Owner NANJING XINGFEI COOLING EQUIP
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