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Centrifugal compressor and turbocharger

A technology of centrifugal compressors and impellers, applied in the direction of machines/engines, mechanical equipment, engine components, etc., can solve problems such as the limit of the expansion of the diffusion part, the enlargement of the centrifugal compressor, and the deterioration of the mountability

Pending Publication Date: 2021-12-07
MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the outer diameter of the diffuser leads to an increase in the size of the centrifugal compressor and deterioration of mountability, so there is a limit to enlarging the outer diameter of the diffuser.

Method used

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  • Centrifugal compressor and turbocharger
  • Centrifugal compressor and turbocharger
  • Centrifugal compressor and turbocharger

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Embodiment Construction

[0099]Hereinafter, several embodiments of the present invention will be described with reference to the drawings. However, dimensions, materials, shapes, relative arrangements, and the like of components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention thereto, but are merely illustrative examples.

[0100] For example, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial" indicating relative or absolute configurations, not only Strictly refers to the arrangement as described above, and also refers to a state of relative displacement by an angle or a distance to the extent that a tolerance or the same function can be obtained.

[0101] For example, expressions such as "same", "equal", and "homogeneous" that indicate a state of equal things not only indicate a state of being strictly equal, but also indicate a state where there is a to...

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Abstract

Provided is a centrifugal compressor, wherein: a diffuser flow path includes a curved flow path section that bends toward the front side of an impeller in the axial direction as the flow path section goes toward the outer side of the impeller in the radial direction; and in a cross section along the rotation axis of the impeller, [alpha]<=60 degrees is satisfied when A is a center line of the diffuser flow path, B is a straight line orthogonal to the center line A at an exit of the diffuser flow path, and [alpha] is an angle formed by the straight line B and the rotation axis of the impeller.

Description

technical field [0001] The invention relates to centrifugal compressors and turbochargers. Background technique [0002] The casing of the centrifugal compressor includes: a scroll portion forming a scroll flow path on the outer peripheral side of the impeller; diffusion flow path. [0003] In the diffusion flow path of the centrifugal compressor, the annular flow path area expands toward the radially outer side of the impeller, whereby the kinetic energy of the air is converted into pressure energy to restore the pressure. Therefore, in order to reduce the pressure loss in the scroll channel of the centrifugal compressor and its outlet channel on the downstream side, it is preferable to restore the pressure as much as possible in the diffuser channel, and therefore, it is effective to increase the outer diameter of the diffuser. However, increasing the outer diameter of the diffuser leads to an increase in the size of the centrifugal compressor and deterioration of mounta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02B39/00
CPCF02B39/00F01D9/00F02C6/12F01D25/30F04D17/10F04D29/4206F04D29/441
Inventor 岩切健一郎富田勋
Owner MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD