Rotor shaft of a turbomachine and method for the production of a rotor of a turbomachine

Patent metadata

Field	Value
Publication number	US-9044833-B2
Application number	US-99685609-A
Country	US
Kind code	B2
Filing date	Jun 10, 2009
Priority date	Jun 19, 2008
Publication date	Jun 2, 2015
Grant date	Jun 2, 2015

Abstract

The invention relates to a rotor ( 1 ) of a turbomachine, in particular of an exhaust gas turbocharger, with a rotor wheel ( 2 ) which has a wheel back ( 3 ), and with a rotor shaft ( 4 ) which has an intermediate piece ( 5 ), via which the rotor shaft ( 4 ) is connected rigidly to the rotor wheel ( 2 ), the intermediate piece ( 5 ) being provided with a disk-shaped balancing plate ( 5 A), the outside diameter (DA) of which is larger than the largest diameter (D 4 C) of the rotor shaft ( 4 ) and which is fixed to the wheel back ( 3 ) of the rotor wheel ( 2 ).

First claim

The invention claimed is:

1. A method for producing a balanced rotor ( 1 ) of an exhaust gas turbocharger, comprising:
connecting a rotor shaft ( 4 ) to a rotor wheel ( 2 ) via an intermediate piece ( 5 ), wherein the rotor shaft has a largest diameter (D 4C ), the rotor wheel ( 2 ) has a wheel back ( 3 ), the intermediate piece ( 5 ) is affixed to the wheel back ( 3 ) of the rotor wheel ( 2 ), and the intermediate piece ( 5 ) is provided with a disk-shaped balancing plate ( 5 A) with an outside diameter (D A ) which is larger than the largest diameter (D 4C ) of the rotor shaft ( 4 ); and
balancing of the rotor ( 1 ) by removal of balance material from the disk-shaped balancing plate ( 5 A).

2. The method as claimed in claim 1 , wherein the balancing material is removed from the circumference of the intermediate piece ( 5 ).

3. The method as claimed in claim 1 ,
wherein the intermediate piece ( 5 ) is connected to the rotor wheel ( 2 ) by means of high-temperature soldering in a furnace under a vacuum or soldering by means of heating by an electron or laser beam or by means of a high-frequency heat source.

4. The method as claimed in claim 1 ,
wherein the intermediate piece ( 5 ) is connected by means of an MIM method to the rotor wheel ( 2 ) produced by means of an MIM method.

5. The method as claimed in claim 4 , wherein the intermediate piece ( 5 ) is a component produced by the MIM method or lost-wax casting method.

6. The method as claimed in claim 1 ,
wherein the intermediate piece ( 5 ) is connected to the rotor wheel ( 2 ) by means of high-temperature soldering in a furnace under a vacuum or soldering by means of heating by an electron or laser beam or by means of a high-frequency heat source.

7. The method as claimed in claim 1 , wherein the removal of material is performed by milling.

Assignees

• Holzschuh Christian
• Borgwarner Inc

Inventors

• Holzschuh Christian

Classifications

• B23P15/006 Primary

  turbine wheels · CPC title

• F02C6/12

  Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure · CPC title

• F05D2230/21

  by casting · CPC title

• F01D5/025

  Fixing blade carrying members on shafts (attachment of a member on a shaft in general F16D1/06; for non-positive displacement pumps F04D29/00) · CPC title

• F02B39/00

  Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00 · CPC title