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Compressor wheel of a charging device

A technology for compressor impellers and supercharging equipment, which is applied in mechanical equipment, engine components, combustion engines, etc. to achieve the effect of reducing stress and reducing the tendency of rupture

Active Publication Date: 2017-02-22
BMTS TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the disadvantages of compressor wheels are known from the prior art, optimizing their tendency to rupture, for which purpose a high level of technology and monetary outlay is required

Method used

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  • Compressor wheel of a charging device
  • Compressor wheel of a charging device

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Experimental program
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Embodiment Construction

[0021] according to figure 1 and local basis figure 2 , according to the invention of a charging device 2 (unless only indicated otherwise), in particular a compressor wheel 1 of an exhaust-gas turbocharger 3 , having a hub 4 and blades 5 and a wheel back 6 . Now, in order to be able to reduce the tendency of the compressor impeller 1 to break and thus to prolong its service life, the impeller back 6 provided according to the invention has an undulating profile running from the hub 4 in a radial direction 7, the impeller back 6 There are regions 8 , 9 , 10 and 11 running from the hub 4 in the radial direction 7 and adjoining each other.

[0022] As can be clearly seen here in figure 1 As seen in the left half of , the first region 8 has a concave design, whereas the second region 9 adjoining the latter in the radial direction 7 has a convex design. A third area 10 , which in turn adjoins the second convex area 9 , has a concave design, while a fourth area 11 has a convex d...

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PUM

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Abstract

A compressor wheel (1) of a charging device (2) may include a hub (4), a plurality of blades (4) and a wheel back (6). The wheel back (6) may have an undulating profile (13) which extends from the hub (4) in a radial direction (7). The undulating profile may include a plurality of regions (8,9,10,11). The plurality of regions may adjoin one another and may include a first concave region (8), a second convex region (9), a third concave region (10), and a fourth convex region (11). The second convex region (9) may adjoin the first concave region (8). The third concave region (10) may adjoin the second convex region (9). The fourth convex region (11) may adjoin the third concave region (10). In this way, the fracture trend can be decreased to the greatest extent.

Description

technical field [0001] The invention relates to a compressor wheel of a supercharging device, having a hub according to the preamble of claim 1 and blades incorporated into the hub, and also having a wheel back. The invention also relates to an exhaust-gas turbocharger with such a compressor wheel. Background technique [0002] EP1809907B1 discloses a compressor wheel of the type in question having an axis of rotation and a plurality of blades extending generally radially away from the axis and generally axially from the surface of a disc-shaped holder, wherein pairs of holders The mounting surface defines the back of the impeller. Here, at least a part of the impeller back is provided with a residual compressive stress layer extending to a depth below the impeller back surface. This is especially aimed at reducing breakage. [0003] US Pat. No. 6,164,931 likewise discloses a compressor wheel of the type in question, but whose wheel back is curved, that is to say in parti...

Claims

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Application Information

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IPC IPC(8): F04D29/32
CPCF04D29/321F01D5/048F04D25/04F04D29/284F05D2220/40F05D2250/611F01D5/021F01D5/043F02B33/00F02B37/00Y02T10/12F02C6/12F04D29/26F05B2220/40F05B2240/30
Inventor 金荷·托艾·彭
Owner BMTS TECH SHANGHAI CO LTD