TURBOCHARGER

• US 20190331128A1
• Filed: 04/26/2019
• Published: 10/31/2019
• Est. Priority Date: 04/27/2018
• Status: Abandoned Application

• Current Assignee: MAN Energy Solutions SE (Volkswagen AG)
• Original Assignee: MAN Energy Solutions SE (Volkswagen AG)
• Inventors: Braun, Steffen, Albrecht, Daniel, Denkel, Harald, Weihard, Stefan, Haas, Bernd, Niebuhr, Johannes, Spatz, Urban
• Application Number:
  US16/395,517
• Publication Number:
  US 20190331128A1
• Time in Patent Office: Days
• CPC Class Codes: F01D 21/045 special arrangements in stators or in rotors dealing with breaking-off of part of rotor
• CPC Class Codes: F01D 25/24 Casings modified for heating or cooling F01D25/14; Casing parts, e.g. diaphragms, casing fastenings casings for rotary machines or engines in general F16M ; special arrangements in stators dealing with breaking-off of part of rotor F01D21/045
• CPC Class Codes: F01D 25/26 Double casings; Measures against temperature strain in casings
• CPC Class Codes: F02B 33/40 of non-positive-displacement type
• CPC Class Codes: F04D 25/024 the driving means being assisted by a power recovery turbine
• CPC Class Codes: F04D 29/403 especially adapted for elastic fluid pumps
• CPC Class Codes: F05D 2220/40 in turbochargers
• CPC Class Codes: F05D 2230/642 using maintaining alignment while permitting differential dilatation
• CPC Class Codes: F05D 2240/14 Casings or housings protecting or supporting assemblies within
• CPC Class Codes: F05D 2260/31 Retaining bolts or nuts

Abstract

A turbocharger, with a turbine and a compressor. A turbine housing of the turbine and a compressor housing of the compressor are connected to a bearing housing arranged between the same. A casing surrounds the turbine housing and/or the compressor housing and/or the bearing housing radially outside and axially outside at least in sections, which are connected to the respective housing to be encased via multiple fastening devices. At least one fastening device forms a fixed bearing-like connection and at least one fastening device a loose bearing-like connection of the casing on the respective housing to be encased.

Claims

1. A turbocharger, comprising:

a turbine configured to expand a first medium;

a compressor configured to compress a second medium utilising energy extracted in the turbine during expansion of the first medium;

a turbine housing of the turbine;

a compressor housing of the compressor;

a bearing housing arranged between and connected to the turbine housing and the turbine housing;

a casing configured to surround one or more of radially outside and axially outside at least in sections the turbine housing, the compressor housing, and the bearing housing,

multiple fastening devices configured to connect the casing to the respective housing to be encased;

at least one first fastening device of the multiple fastening devices configured as a fixed bearing-like connection; and

at least one second fastening device of the multiple fastening devices configured as a loose bearing-like connection of the casing on the respective housing to be encased.

2. The turbocharger according to claim 1, wherein

the at least one first fastening device prevents a relative movement between the casing and the respective housing to be encased, and

the at least one second fastening device allows a relative movement between the casing and the respective housing to be encased in a translational direction.

3. The turbocharger according to claim 1, wherein the at least one second fastening device allows a translational relative movement between the casing and the respective housing to be encased in a radial direction.

4. The turbocharger according to claim 3, wherein on at least one axial wall of the casing the at least one first fastening device provides a fixed bearing-like connection and the at least one second fastening device a loose bearing-like connection.

5. The turbocharger according to claim 3, wherein on axial walls of the casing located opposite one another, a respective first fastening device provides a fixed bearing-like connection and a respective second fastening device provides a loose bearing-like connection.

6. The turbocharger according to claim 3, wherein a fixed bearing-like connection formed on an axial wall and a respective loose bearing-like connection formed on a same axial wall lie on an axis that extends in a radial direction.

7. The turbocharger according to claim 1, wherein the loose bearing-like connection allows a translational relative movement between the casing and the respective housing to be encased in an axial direction.

8. The turbocharger according to claim 7, wherein on an axial wall of the casing a respective fastening device provides a fixed bearing-like connection and on a radial wall of the casing and a respective fastening device provides a loose bearing-like connection.

9. The turbocharger according to claim 1, wherein a respective first fastening device, which forms a fixed bearing-like connection, extends without play or almost without play through a recess in a respective wall of the casing.

10. The turbocharger according to claim 1, wherein a respective second fastening device, which forms a loose bearing-like connection, extends through an elongated hole in a respective wall of the casing.