Centrifugal compressor and turbocharger provided with said centrifugal compressor

A technology of centrifugal compressors and impellers, which is applied in the field of centrifugal compressors and turbochargers, which can solve the problems of not being able to expand the working area on the small flow side and reduce efficiency, and achieve the effect of suppressing peeling and expanding the working area

Active Publication Date: 2019-12-17
MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the structure of the centrifugal compressor described in Patent Document 1 is not intended to solve the problem of reduced efficiency due to the operation in

Method used

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  • Centrifugal compressor and turbocharger provided with said centrifugal compressor
  • Centrifugal compressor and turbocharger provided with said centrifugal compressor
  • Centrifugal compressor and turbocharger provided with said centrifugal compressor

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[0053] Hereinafter, several embodiments of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the following embodiments. The dimensions, materials, shapes, and relative arrangements of the structural components described in the following embodiments are not intended to limit the scope of the present invention to these, but are merely illustrative examples.

[0054] Taking a centrifugal compressor of a turbocharger as an example, the centrifugal compressor of several embodiments of the present invention shown below will be described. However, the centrifugal compressor of the present invention is not limited to the centrifugal compressor of the turbocharger, and may be any centrifugal compressor that works alone. In the following description, although the fluid compressed by the compressor is air, it can be replaced with any fluid.

[0055] Such as figure 1 As shown, the centrifugal compressor 1 ha...

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Abstract

The invention provides a centrifugal compressor and a turbocharger provided with the centrifugal compressor. The centrifugal compressor is provided with: an impeller; and a housing in which a helicalscroll flow channel is formed on the outer circumferential side of the impeller, and the circumferential position of the scroll flow channel is expressed by an angular position relative to the windingend of the scroll flow channel. When defining F(theta) = (A/R)/r, the relationships 0.35 <= F(360-degree) <= 0.65 and 0.08 * F(360-degree) <= F(60-degree) <= 0.4 * F(360-degree) are satisfied with respect to the cross-section when the scroll flow channel is intersected by a plane that includes the axis of rotation of the impeller at the circumferential position in which the angular position is theta, where A is the cross-sectional area of the scroll flow channel, R is the distance from the axis of rotation to the scroll center in the cross-section of the scroll flow channel, and r is the radius of the impeller.

Description

technical field [0001] The present invention relates to a centrifugal compressor and a turbocharger having the centrifugal compressor. Background technique [0002] In recent years, the working area of ​​centrifugal compressors needs to be expanded. For example, automotive engines need to improve fuel economy and acceleration performance in the low-speed range, and turbochargers need to expand the operating range on the low-speed, low-flow side. Patent Document 1 describes a centrifugal compressor that does not aim at enlarging the working area on the small flow side, but by changing the enlarging rate of the cross-sectional area of ​​the scroll flow path in the circumferential direction, the effect of the tongue is reduced. Losses caused by peeling between tongue and compressed air to improve efficiency. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: International Publication No. 2012 / 132528 Contents of the invention [0006] The ...

Claims

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Application Information

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IPC IPC(8): F04D29/44
CPCF04D29/441F05D2250/52F05D2250/70
Inventor 佐佐木岳
Owner MITSUBISHI HEAVY IND ENGINE & TURBOCHARGER LTD
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