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Nozzle blade

A technology for nozzle blades and turbine impellers, which is applied in the direction of blade support components, stators, engine components, etc., and can solve problems such as changes in turbine efficiency

Active Publication Date: 2014-01-29
IHI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is known that if the shape of the nozzle vane arranged around the turbine wheel is changed, the flow of exhaust gas supplied to the turbine wheel changes and the turbine efficiency changes as the shape of the nozzle vane changes.

Method used

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Examples

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Embodiment Construction

[0031] Hereinafter, an embodiment of the nozzle vane according to the present invention will be described with reference to the drawings. In addition, in the following figures, the scale of each component is appropriately changed in order to make each component a recognizable size.

[0032] figure 1 It is an enlarged sectional view of a main part of a turbocharger including the nozzle vane 10 of the present embodiment.

[0033] Such as figure 1 As shown, the turbocharger includes a turbine impeller 1 that is rotationally driven by receiving exhaust gas. On the upstream side of the turbine wheel 1, there is formed a nozzle N that is surrounded by a shroud 2 that surrounds the top side of the turbine blades that the turbine wheel 1 has and at the height of the nozzle vane 10 (nozzle vane height) relative to the shroud 2 The hubs 3 (opposing walls) arranged oppositely at a distance in the direction are formed.

[0034] The nozzle N is provided so as to surround the entire cir...

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PUM

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Abstract

The present invention pertains to a nozzle blade having: a front edge formed in a curve-line shape in such a manner that the distance of the front edge from the pivot axis of the nozzle blade changes depending on the position in height of the nozzle blade; and a rear edge formed in a straight-line shape in such a manner that the distance of the rear edge from the pivot axis of the nozzle blade is constant irrespective of the position in height of the nozzle blade.

Description

technical field [0001] The present invention relates to nozzle vanes. This application claims priority based on Japanese Patent Application No. 2011-118104 for which it applied in Japan on May 26, 2011, and uses these content here. Background technique [0002] In a variable capacity turbocharger, a plurality of nozzle vanes are arranged in an annular shape around the turbine impeller, and the capacity of the turbine is changed by adjusting the opening of the nozzles using the rotation angle of these nozzle vanes. [0003] It is known that changing the shape of the nozzle vane arranged around the turbine wheel changes the flow of exhaust gas supplied to the turbine wheel and changes the turbine efficiency as the shape of the nozzle vane changes. [0004] For example, Patent Document 1 proposes a nozzle vane in which a leading edge shape and a trailing edge shape are curved in the vane height direction (rotation axis direction). [0005] More specifically, in Patent Documen...

Claims

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Application Information

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IPC IPC(8): F01D17/16F02B37/24
CPCF05D2240/121F02C6/12F01D17/16F05D2220/40F01D9/045Y02T10/144F02B37/24F01D17/165F01D5/141Y02T10/12
Inventor 森田功
Owner IHI CORP