Rotary expansible chamber devices – Interengaging rotating members – Helical or herringbone
Patent
1993-03-29
1995-02-28
Bertsch, Richard A.
Rotary expansible chamber devices
Interengaging rotating members
Helical or herringbone
418152, 418179, F01C 124
Patent
active
053932099
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.
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Mohr Peter B.
Myers Wendell B.
Bertsch Richard A.
Freay Charles G.
Moser William R.
Sartorio Henry
The United States of America as represented by the United States
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