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Blade with small wing rib blade tip and turbine utilizing blade

A blade and wing rib technology, applied in the field of turbine blade manufacturing, can solve problems such as energy loss, achieve the effect of improving efficiency and reducing leakage flow

Inactive Publication Date: 2017-02-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the axial-flow turbomachinery, there is a certain radial gap between the rotating blade and the stationary casing, and the working medium passes through the blade tip gap under the action of the lateral pressure difference between the pressure side surface and the suction side surface of the moving blade. Leakage vortices are generated in the cascade channel, resulting in large energy loss
Therefore, reducing the leakage of useful working fluid caused by the tip clearance can effectively improve the efficiency of the turbomachinery, but there is no effective method or structural design to reduce the loss caused by the tip leakage in the prior art

Method used

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  • Blade with small wing rib blade tip and turbine utilizing blade
  • Blade with small wing rib blade tip and turbine utilizing blade
  • Blade with small wing rib blade tip and turbine utilizing blade

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] see figure 1 and figure 2 As shown, Embodiment 1 of the present invention provides a blade with a winglet rib tip, and the blade tip of the blade is provided with a pressure side winglet 201 and / or a suction side winglet 202, wherein the pressure side winglet 201 is located on the blade tip The pressure side surface 203 of the blade, and the suction side winglet 202 is located on the suction side surface 204 of the blade.

[0055] Specifically, the blade is a turbine blade; the length direction of the pressure side winglet 201 is from the leading edge 205 to the trailing edge 206 of the blade; the length direction of the suction side winglet 202 is from the leading edge 205 to the blade The direction of the trailing edge 206 of the blade; the pressure side winglet 201 is arranged along the extension direction of the blade basin curve 208 , and the suction side winglet 202 is arranged along the extension direction of the blade back curve 207 . The junction of the pres...

Embodiment 2

[0082] Embodiment 2 of the present invention provides a turbine, which includes a hub and the blades provided in Embodiment 1 with riblet tips; the blades with riblet tips are fixed on the hub.

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PUM

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Abstract

The invention relates to the technical field of manufacturing of turbine blades, particularly to a blade with a small wing rib blade tip and a turbine utilizing the blade. The blade is characterized in that the blade tip of the blade is provided with a pressure side small wing and / or a suction force side small wing, wherein the pressure side small wing is positioned on the pressure side surface of the blade; and the suction force side small wing is positioned on the suction force side surface of the blade. The turbine comprises a hub and the blade with the small wing rib blade tip, wherein the blade with the small wing rib blade tip is fixed to the hub. The blade has the characteristics that leakage flow of the blade tip is reduced, loss, caused by a leakage vortex and an upper channel vortex, in a blade grid is reduced, and finally, the efficiency of an impeller mechanism is improved.

Description

technical field [0001] The invention relates to the technical field of manufacturing turbine blades, in particular to a blade with winglet rib tip and a turbine using the blade. Background technique [0002] In the axial-flow turbomachinery, there is a certain radial gap between the rotating blade and the stationary casing, and the working medium passes through the blade tip gap under the action of the lateral pressure difference between the pressure side surface and the suction side surface of the moving blade. Leakage vortices are generated in the cascade channel, resulting in large energy loss. Therefore, reducing the leakage of useful working fluid caused by the blade tip clearance can effectively improve the efficiency of the turbomachinery, but there is no effective method or structural design for reducing the loss caused by the blade tip leakage in the prior art. Contents of the invention [0003] The object of the present invention is to provide a blade with a sma...

Claims

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Application Information

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IPC IPC(8): F01D5/14
CPCF01D5/141
Inventor 陈绍文周治华孟庆鹤王松涛
Owner HARBIN INST OF TECH
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