Double-ended ceramic helical-rotor expander
Abstract
A ceramic helical rotor expander using a double-ended or tandem herringbone type rotor arrangement with bearing and seal assemblies remote from the hot gas inlets and especially capable of operating at an inlet temperature of above 1100.degree. C. The rotors are solid or hollow and bonded to hollow metal shafts, and mounted in a composite or simple prismatic casing. The rotors, casing and shafts are constructed from low expansivity materials. In the preferred embodiment the rotors are constructed of silicon nitride and the shafts constructed of an molybdenum alloy, with the metal shafts being supported in bearings and secured to synchronizing gears. The rotors and casing may be provided with coolant channels therein, and are constructed to eliminate the problem of end leakages at inlet temperature and pressure, and the need for high temperature bearings and seals.
- Inventors:
-
- Livermore, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 869762
- Patent Number(s):
- 5393209
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01C - ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05C - INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- DOE Contract Number:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- double-ended; ceramic; helical-rotor; expander; helical; rotor; tandem; herringbone; type; arrangement; bearing; seal; assemblies; remote; hot; gas; inlets; especially; capable; operating; inlet; temperature; 1100; degree; rotors; solid; hollow; bonded; metal; shafts; mounted; composite; simple; prismatic; casing; constructed; expansivity; materials; preferred; embodiment; silicon; nitride; molybdenum; alloy; supported; bearings; secured; synchronizing; gears; provided; coolant; channels; therein; eliminate; leakages; pressure; seals; inlet temperature; channels therein; coolant channel; gas inlet; silicon nitride; preferred embodiment; hot gas; type rotor; molybdenum alloy; coolant channels; hollow metal; ceramic helical; rotor expander; /418/
Citation Formats
Mohr, Peter B, and Myers, Wendell B. Double-ended ceramic helical-rotor expander. United States: N. p., 1995.
Web.
Mohr, Peter B, & Myers, Wendell B. Double-ended ceramic helical-rotor expander. United States.
Mohr, Peter B, and Myers, Wendell B. Sun .
"Double-ended ceramic helical-rotor expander". United States. https://www.osti.gov/servlets/purl/869762.
@article{osti_869762,
title = {Double-ended ceramic helical-rotor expander},
author = {Mohr, Peter B and Myers, Wendell B},
abstractNote = {A ceramic helical rotor expander using a double-ended or tandem herringbone type rotor arrangement with bearing and seal assemblies remote from the hot gas inlets and especially capable of operating at an inlet temperature of above 1100.degree. C. The rotors are solid or hollow and bonded to hollow metal shafts, and mounted in a composite or simple prismatic casing. The rotors, casing and shafts are constructed from low expansivity materials. In the preferred embodiment the rotors are constructed of silicon nitride and the shafts constructed of an molybdenum alloy, with the metal shafts being supported in bearings and secured to synchronizing gears. The rotors and casing may be provided with coolant channels therein, and are constructed to eliminate the problem of end leakages at inlet temperature and pressure, and the need for high temperature bearings and seals.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {1}
}