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Variable geometry turbines and turbochargers

A turbine impeller, turbine technology, applied in the direction of machines/engines, mechanical equipment, engine components, etc.

Active Publication Date: 2016-08-10
CUMMINS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of such repair or replacement would be considerable

Method used

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  • Variable geometry turbines and turbochargers
  • Variable geometry turbines and turbochargers
  • Variable geometry turbines and turbochargers

Examples

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Embodiment Construction

[0031] figure 1 and figure 2 A variable geometry turbocharger according to an embodiment of the invention is shown. A variable geometry turbocharger comprises a variable geometry turbine housing 1 and a compressor housing 2 interconnected by a central bearing housing 3 . The turbocharger shaft 4 extends from the turbine housing 1 to the compressor housing 2 via the bearing sleeve 3 . A turbine wheel 5 is mounted on one end of the shaft 4 for rotation within the turbine housing 1 , and a compressor wheel 6 is mounted on the other end of the shaft 4 for rotation within the compressor housing 2 . The shaft 4 rotates about the turbocharger axis 4 a on a bearing assembly located in the bearing housing 3 .

[0032] The turbine housing 1 defines an inlet volute 7 to which gas from an internal combustion engine (not shown) is delivered. Exhaust gas flows from the inlet volute 7 to the axial outlet channel 8 via the annular inlet channel 9 and the turbine wheel 5 . The inlet chan...

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Abstract

A variable geometry turbine comprising: a housing; a turbine wheel supported within the housing for rotation about a turbine axis; an annular inlet passage upstream of the turbine wheel and defined between a corresponding inlet surface defined by an annular nozzle ring and a facing annular shroud between. The nozzle ring and shroud are axially movable relative to each other to vary the size of the inlet passage; the nozzle ring has a circumferential array of inlet vanes extending through the inlet passage. The shroud covers the opening of the shroud cavity and defines a circumferential array of vane slots, each vane slot corresponding to an inlet vane, the vane slots and shroud cavity being configured to receive the inlet vanes to allow axial movement of the nozzle ring. a gap between a portion of the at least one vane slot and an adjacent portion of the inlet vane is greater than a gap between another portion of the at least one vane slot and an adjacent portion of the inlet vane, the portion of the at least one vane slot forms part of a portion of the increased gap, at least The other part of one vane groove does not form part of the gap increasing part.

Description

technical field [0001] The present invention relates to a variable geometry turbine. In particular, but not exclusively, the invention relates to variable geometry turbines suitable for turbochargers or other turbomachines. Background technique [0002] A turbomachine includes a turbine. A conventional turbine includes an exhaust gas driven turbine wheel mounted on a rotating shaft within a turbine housing connected downstream of the engine outlet manifold. One type of turbomachine is a turbocharger. In the case of a turbocharger, rotation of the turbine wheel drives a compressor wheel mounted on the other end of the rotating shaft within the compressor housing to deliver compressed air to the engine inlet manifold. Another type of turbomachine is a power turbine. In the case of a power turbine, rotation of the turbine wheel may drive a gear that transmits mechanical power to an engine (such as an engine flywheel) or an electrical generator (such as an electric generator...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D17/16
CPCF01D17/143F01D17/167F05D2220/40F05D2240/12F01D17/16
Inventor 詹姆士·查尔斯·奥姆斯戴德
Owner CUMMINS LTD