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Runner for a hydraulic turbine or pump and method of manufacturing

A technology of water turbines and runners, used in final product manufacturing, reaction engines, sustainable manufacturing/processing, etc., and can solve problems such as ineffective refilling capabilities

Active Publication Date: 2020-12-18
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the tail water level rises and the back pressure increases accordingly, the gas filling capability of prior art designs may become ineffective

Method used

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  • Runner for a hydraulic turbine or pump and method of manufacturing
  • Runner for a hydraulic turbine or pump and method of manufacturing
  • Runner for a hydraulic turbine or pump and method of manufacturing

Examples

Experimental program
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Effect test

Embodiment Construction

[0023] figure 1 A cross-sectional view of an axial-flow runner is schematically shown. The runner hub is designated with reference numeral 1 (only the right side is shown in its entirety). Runner blades denoted by reference numeral 2 extend from the hub 1 . The blade 2 has a leading edge 3 and a trailing edge 4 , which means that fluid entering the runner flows from the leading edge 3 to the trailing edge 4 . The fluid flow is divided by the blades 2, wherein one side of the blades 2 forms a pressure surface and the other side forms a suction surface. At least one blade 2 contains gas channels, which are indicated with reference numeral 5 . The gas channel 5 includes an air inlet orifice designated with reference numeral 6 . At the trailing edge 4 the gas channel 5 forms an opening denoted by reference numeral 7 . Air intake orifices 6 are located in the runner hub 1 . Arrows indicate gas flow direction.

[0024] figure 2 A cross-sectional view of a mixed-flow runner ...

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PUM

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Abstract

A runner for a hydraulic turbine or pump, comprising a plurality of blades, each blade being defined by a pressure surface, an oppositely facing suction surface, a leading edge and a spaced apart trailing edge, at least one of the blades having means for supplying a flow of oxygen containing gas to the trailing edge of at least one of the blades whereas the profile of the suctions side surface ofthe blade along a cross section through a point P1 and a point P2 is concave, whereas point P1 is located on the suction side surface of the trailing edge where an opening is located and point P2 is spaced apart from point P1 by less than 3% of the runner outlet diameter D and point P2 is located upstream of point P1 on a line perpendicular to the trailing edge (4) starting at point P1.

Description

technical field [0001] The present invention relates generally to hydroelectric turbine or water pumping arrangements. More specifically, the present invention relates to a hydroelectric plant having means for increasing the level of dissolved gases in water passing through a turbine or pump. Background technique [0002] A significant environmental problem with many hydroelectric facilities is the poor quality of the discharge water. Various attempts have been made to increase the dissolved oxygen levels in the discharge water of hydroelectric power plants. For example, US patents. U.S. Patent 5,924,842 to Beyer, James R. discloses a runner for a Francis turbine comprising a crown; a band substantially concentric with the crown; and a plurality of Vanes extending between the crown and the band, each vane secured to the crown at an inner edge and to the band at a distal outer edge, each vane having a pressure side, an opposite suction side, a leading edge and spaced apar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B3/12F03B11/00
CPCF03B11/002F05B2220/64Y02E10/20Y02P70/50F03B3/121F05D2240/24F05D2240/30F03B3/183F05B2260/96
Inventor S.库尔森J.福斯特J.佐尔S.麦克哈尔J.蒋B.哈默
Owner VOITH PATENT GMBH