Centrifugal compressors and turbochargers
A technology of centrifugal compressors and impellers, which can be used in machine/engine, mechanical equipment, engine manufacturing, etc., and can solve undisclosed problems.
Active Publication Date: 2021-06-25
MITSUBISHI HEAVY IND LTD
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Problems solved by technology
[0008] Regarding this point, in the centrifugal gas compressor described in Patent Document 1, a plurality of diffuser blades are arranged in an asymmetrical pattern in consideration of the pressure distribution in the circumferential direction, but for suppressing the flow on the diffuser blades from swirl flow The specific structure of peeling off near the exit of the road is not disclosed in Patent Document 1
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[0046] 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, but are merely illustrative examples.
[0047] The centrifugal compressor according to the embodiment described below can be applied to, for example, a turbocharger, but the application object is not limited to the turbocharger.
[0048] figure 1 is a schematic sectional view along the axial direction of a centrifugal compressor according to an embodiment, Figure 2A and Figure 2B is for illustration figure 1 A diagram showing the configuration of the components of the centrifugal compressor. Figure 2A is viewed from the axial figure 1 A diagram showing the interior of a centrifugal compressor, Figure 2B Yes Figure 2A A partial enlargement of the . But w...
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The centrifugal compressor includes: an impeller; a plurality of diffuser blades arranged in a circumferential direction on the radially outer side of the impeller; The plurality of diffuser vanes are located radially outside the vortex flow path, and the plurality of diffuser vanes include: at least one first diffuser vane, the first diffuser vane is at least partially located at the tongue of the vortex portion in the circumferential direction and the second diffuser vane, the second diffuser vane is located outside the angular range, the tangent at the trailing edge of the pressure surface of each of the plurality of diffuser vanes The blade outlet angle formed with respect to the radial direction, when the blade outlet angle of the first diffuser blade is β1 and the blade outlet angle of the second diffuser blade is β2, β1< beta 2.
Description
technical field [0001] The invention relates to a centrifugal compressor and a turbocharger. Background technique [0002] As a centrifugal compressor applied to a turbocharger or the like, a centrifugal compressor in which a diffuser vane for decelerating and boosting fluid is provided on the downstream side of an impeller for applying a centrifugal force to a fluid may be used. [0003] For example, Patent Document 1 discloses a centrifugal gas compressor including a plurality of diffuser fins (diffusion vanes (Japanese: Difuuzabein)) and a scroll, wherein the plurality of diffuser fins are configured to The velocity of the flow of fluid from the impeller is converted into pressure, and the scroll serves to guide the flow of fluid from the diffuser fins to the outside. In this centrifugal gas compressor, in order to improve the efficiency of the diffuser, a plurality of diffuser fins are arranged in an asymmetrical pattern in the circumferential direction in consideration...
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IPC IPC(8): F04D29/44F02B39/00F04D17/10
CPCF02B39/00F05D2220/40F04D29/444F05D2250/52F04D25/024F04D17/10F05D2210/12F04D29/4213F04D29/441
Inventor 岩切健一郎
Owner MITSUBISHI HEAVY IND LTD