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Axial flow turbine and supercharger

An axial flow, turbine technology, applied in gas turbine devices, mechanical equipment, engine components, etc., can solve the problems of complex structure, increased cost, increased leakage flow, etc., and achieve the effect of uniform clearance

Active Publication Date: 2017-08-01
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the local leakage flow increases, and the loss caused by the leakage flow increases
[0011] In this regard, in Patent Document 1, the reduction of the blade tip clearance during operation is achieved by tilting the functional material, but new components are required, the structure is complicated, and the cost may increase significantly.

Method used

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  • Axial flow turbine and supercharger
  • Axial flow turbine and supercharger
  • Axial flow turbine and supercharger

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Embodiment Construction

[0043] Hereinafter, several modes for implementing the present invention will be described with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are illustrative examples.

[0044] First, refer to figure 1 , the turbocharger 1 including the axial turbine 2 of the present embodiment will be described. figure 1 It is a sectional view (longitudinal sectional view) showing the overall structure of the turbocharger 1 according to one embodiment, and shows an exhaust turbocharger for ships as an example. In addition, the type and application of the supercharger 1 are not limited thereto.

[0045] Such as figure 1 As shown, a turbocharger 1 according to one embodiment includes an axial turbine 2 driven by exhaust gas from an internal combustion engine (for example, a marine diesel engine), and a compressor...

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PUM

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Abstract

This axial flow turbine is provided with: a rotor having a plurality of rotor blades on an outer periphery thereof; and a stationary member provided on the outer periphery side of the rotor and having an annular wall face facing the tip face of each rotor blade. When the axial flow turbine is stopped, the clearance between the annular wall face and the tip face on the trailing edge side of the rotor blade is greater than that of the leading edge side of the rotor blade.

Description

technical field [0001] The present invention relates to an axial flow turbine and supercharger in which a plurality of movable blades are arranged on the outer periphery of a rotor. Background technique [0002] In general, an axial flow turbine utilizes a fluid flowing axially within a casing to rotate a rotor mounted with movable blades. [0003] In such an axial flow turbine, leakage flow in the tip clearance between the stationary member on the housing side and the movable vane becomes a major cause of performance degradation. Generally, the blade tip clearance is set so that the stationary parts do not contact the movable blades, taking into account the effects of thermal deformation, centrifugal deformation, vibration, and looseness during turbine operation. [0004] Therefore, in order to improve the performance of the axial turbine, it is required to reduce the tip clearance. [0005] For example, Patent Document 1 describes a structure in which the stationary memb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B39/00F01D5/20F01D11/08F01D11/14F02C7/28
CPCF01D5/20F01D11/08F01D11/14F02B39/00F02C7/28
Inventor 平谷文人横山隆雄和田康弘
Owner MITSUBISHI HEAVY IND LTD