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Title: Turbocharger with sliding piston, and having vanes and leakage dams

Abstract

A turbocharger having a sliding piston for regulating exhaust gas flow into the turbine wheel includes a set of first vanes mounted on a fixed first wall of the turbine nozzle and projecting axially toward an opposite second wall of the nozzle, and/or a set of second vanes mounted on the end of the piston and projecting in an opposite axial direction toward the first wall of the nozzle. For the/each set of vanes, there are leakage dams formed on the wall that is adjacent the vane tips when the piston is closed. The leakage dams are closely adjacent the vane tips and discourage exhaust gas from leaking in a generally radial direction past the vane tips as the piston just begins to open from its fully closed position.

Inventors:
 [1];  [2]
  1. Nancy, FR
  2. Thaon Les Vosges, FR
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1034352
Patent Number(s):
8070425
Application Number:
12/058,052
Assignee:
Honeywell International Inc. (Morristown, NJ)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
DOE Contract Number:  
FC26-06NT42873
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Citation Formats

Roberts, Quentin, and Alnega, Ahmed. Turbocharger with sliding piston, and having vanes and leakage dams. United States: N. p., 2011. Web.
Roberts, Quentin, & Alnega, Ahmed. Turbocharger with sliding piston, and having vanes and leakage dams. United States.
Roberts, Quentin, and Alnega, Ahmed. Tue . "Turbocharger with sliding piston, and having vanes and leakage dams". United States. https://www.osti.gov/servlets/purl/1034352.
@article{osti_1034352,
title = {Turbocharger with sliding piston, and having vanes and leakage dams},
author = {Roberts, Quentin and Alnega, Ahmed},
abstractNote = {A turbocharger having a sliding piston for regulating exhaust gas flow into the turbine wheel includes a set of first vanes mounted on a fixed first wall of the turbine nozzle and projecting axially toward an opposite second wall of the nozzle, and/or a set of second vanes mounted on the end of the piston and projecting in an opposite axial direction toward the first wall of the nozzle. For the/each set of vanes, there are leakage dams formed on the wall that is adjacent the vane tips when the piston is closed. The leakage dams are closely adjacent the vane tips and discourage exhaust gas from leaking in a generally radial direction past the vane tips as the piston just begins to open from its fully closed position.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {12}
}

Patent:

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