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Compressor wheel for booster equipment

A technology of compressor impeller and booster equipment, which is applied in the field of compressor impeller to achieve the effect of reducing stress and reducing the tendency of cracking

Active Publication Date: 2019-09-13
BMTS TECH SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 for booster equipment
  • Compressor wheel for booster equipment

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Embodiment Construction

[0020] 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.

[0021] 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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Abstract

The invention relates to a compressor impeller (1) of a supercharging device (2) having a hub (4) and blades (5) and also an impeller back (6). Here, it is important for the invention that the impeller back (6) has: a wavy profile (13), which runs in radial direction (7) from the hub (4); regions (8, 9, 10, 11) ), which run in radial direction (7) from the hub (4) and adjoin each other, namely: a first concave area (8); a second convex area (9), which adjoins the first concave area (8) ); the third concave region (10), which adjoins the second convex region (9); the fourth convex region (11), which adjoins the third concave region (10). In this way, the tendency to crack can be largely reduced.

Description

technical field [0001] The invention relates to a compressor wheel for a booster device, with a hub and blades incorporated into the hub, and with 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 particular of concave design. [0004] US 2005 / 0169764 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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
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