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Blade-fixing device of compressor for high speed worm-gear machine

A technology for fixing devices and compressors, applied in gas turbine devices, components of pumping devices for elastic fluids, machines/engines, etc., can solve problems such as inability to achieve, and achieve the effect of improving service life

Inactive Publication Date: 2007-03-14
ABB TURBO SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This requirement cannot be realized with a traditional technical background

Method used

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  • Blade-fixing device of compressor for high speed worm-gear machine
  • Blade-fixing device of compressor for high speed worm-gear machine
  • Blade-fixing device of compressor for high speed worm-gear machine

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Embodiment Construction

[0024] The exhaust gas turbocharger comprises a compressor 1 in the form of a radial compressor and an exhaust gas turbine, not shown, which are mounted on a common shaft 2 . The radial compressor 1 has a compressor housing 3 in which a compressor wheel 4 is rotatably mounted on a shaft 2 . The compressor wheel 4 includes a hub 6 with a plurality of rotor blades 5 . A central through-hole 8 is formed in the hub 6 and accommodates the journal 7 of the shaft 2 ( FIG. 1 ). Through-hole 8 partially forms a hub cone 9 with a base surface 10 ( FIG. 2 ). The journal 7 bears an axle cone 11 corresponding to the hub cone 9 , which itself likewise has a polygonal base surface 12 .

[0025] The hub 6 of the compressor wheel 4 is provided with a rear wall 13 on one axial side. The center of gravity of the compressor impeller 4 is on the side of the rear wall 13 close to the compressor. The through-hole 8 is produced as cylindrical bores 15 , 16 on both sides of the hub cone 9 . The t...

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Abstract

The device has a hub cone (9) and shaft cone (11), each with average diameter (23, 24). The diameters are located at an axial distance (25) to the center of gravity (14) of the compressor impeller (4), which corresponds to at least half the average diameter. The passage bore (8) in the hub (6) is formed at least partially as a cylindrical bore (16) on the shaft side of the hub cone.

Description

technical field [0001] The invention relates to a compressor wheel fixing device for a high-speed turbine. Background technique [0002] The compressor wheel of the turbine is connected to its drive shaft either by a frictional connection or by a positive connection. When the compression ratio increases and thus the driving torque increases and at higher peripheral speeds it is advantageous to use a positive connection for torque transmission, that is to say a positive connection for the shaft-hub connection of the compressor wheel . [0003] EP 05 22 630 B1 discloses a form-fitting compressor wheel fastening, which is connected by means of a splined shaft. In this solution, the lifetime of the shaft-hub-connection is limited due to the notches carried by the keyway. In addition, a further centering element is required, which increases the costs of the compressor wheel. Due to machining tolerances of the splined shaft due to manufacturing conditions, this shaft-hub-conne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D5/02F02C6/12F04D29/28
CPCF04D29/266F01D5/025F05D2230/70F05D2220/40F05B2220/40F05B2230/70
Inventor J·贝蒂格A·米勒
Owner ABB TURBO SYST