초록 ▼

A rotating group for a microturbine power generation system includes an electrical generator rotor, a turbine and a compressor intermediate the generator and the turbine. The turbine, compressor and electrical generator rotor are secured together by a tieshaft. The tieshaft is prestressed such that

A rotating group for a microturbine power generation system includes an electrical generator rotor, a turbine and a compressor intermediate the generator and the turbine. The turbine, compressor and electrical generator rotor are secured together by a tieshaft. The tieshaft is prestressed such that faces of the turbine, electrical generator rotor and compressor maintain contact during high-speed, high-temperature operation of the system.

대표청구항 ▼

[ What is claimed is:] [1.]1. A rotating group for a microturbine power generating system, comprising:a turbine wheel receiving expanding gas, the expanding gas causing the turbine wheel to rotate about an axis;a rotor having at least one rotor surface and a rotor bore concentric with the axis, at l

[ What is claimed is:] [1.]1. A rotating group for a microturbine power generating system, comprising:a turbine wheel receiving expanding gas, the expanding gas causing the turbine wheel to rotate about an axis;a rotor having at least one rotor surface and a rotor bore concentric with the axis, at least a portion of said rotor being magnetic, wherein said at least one rotor surface is adapted for rotation within at least one foil journal bearing;a single tieshaft having a diameter of less than about one-half inch, the tieshaft being concentric with the axis and extending through the rotor bore, the tieshaft having a yield strength and being preloaded in tension to a predetermined percentage of said yield strength; andmeans for maintaining the tension in the tieshaft and securing said rotor and said turbine wheel to rotate in unison with the tieshaft.