Screw turbine and method of power generation

A screw turbine and screw technology, applied in the field of Archimedes screw turbines, can solve problems such as efficiency limitations

Inactive Publication Date: 2013-05-29
乔治·马克·韦伯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But even then, there are limits to the efficiencies achievable with existing hydro turbines

Method used

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  • Screw turbine and method of power generation
  • Screw turbine and method of power generation

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Embodiment Construction

[0038] Referring to the drawings, the helical turbine blades are in the form of an axleless helix. Effectively, the helical turbine blade is constructed from a strip of material (eg steel, or other suitable material) that is twisted along its length. Since the twist is relatively mild, the helix angle γ is relatively small. Therefore, the lead angle α is relatively large. This is a particular case compared to the fact that the blades of conventional screw turbines are generally provided with a much larger angle of inclination.

[0039] The diameter "a" of the helical turbine blade is smaller than the lead "b" of the blade. As exemplified, the ratio of diameter to lead is just over 1:8 and this arrangement combined with the omission of the shaft is believed to facilitate better lateral exchange of fluid when in use.

[0040] Generally, helical turbine blades are immersed in moving water without any sheathing. Referring to the attached drawings, it will be understood that in d...

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Abstract

A screw turbine comprising a helical turbine blade mounted for axial rotation, a mount associated with the helical turbine blade and mounting the helical turbine blade for axial rotation, and a generator associated with the helical turbine blade which converts energy imparted to the helical turbine blade to electricity, wherein the diameter of the helical turbine blade is less than the lead of the helical turbine blade and wherein said screw turbine is adapted to permit lateral exchange of fluid in use.

Description

technical field [0001] The present invention relates to a screw turbine and a method of generating electricity using the same, in particular, the present invention relates to an Archimedes screw turbine comprising a helical turbine blade having a relatively small helix angle and its Use advantageously does not require, or use, an outer sheath as a cover. Background technique [0002] Various forms of turbines are known, these include, for example, cross-flow turbines, Kaplan turbines, Archimedean screw turbines. [0003] In cross-flow turbines, a cylindrical water wheel or runner with a horizontal axis is provided. The water wheel or runner comprises blades arranged radially and tangentially. Blade edges can be sharpened to reduce resistance to water flow. Unlike most hydro turbines, which have radial or axial flow, in a cross-flow turbine, the water passes laterally through the turbine, or across the turbine blades. As with the water wheel, the water is channeled to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03C2/00F01C1/00F03C99/00F03B3/08F03B17/00
CPCF03B17/00F03B3/08Y02E10/223F01D5/141Y02E10/20F05B2240/243
Inventor 乔治·马克·韦伯
Owner 乔治·马克·韦伯
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