초록 ▼

A thrust load compensating system for a compliant foil hydrodynamic fluid film thrust bearing is disclosed. The system includes an end cap over the free end of a rotary machine shaft, a compliant foil hydrodynamic fluid film journal bearing located at the free end of the shaft, and a source of air w

A thrust load compensating system for a compliant foil hydrodynamic fluid film thrust bearing is disclosed. The system includes an end cap over the free end of a rotary machine shaft, a compliant foil hydrodynamic fluid film journal bearing located at the free end of the shaft, and a source of air whose pressure varies with the square of turbomachine speed. The compliant foil hydrodynamic fluid film journal bearing located at the free end of the shaft serves as a non-contacting rotary shaft seal and, together with the end cap and free end of the shaft forms a thrust piston chamber. The thrust load compensating system of the present invention can be utilized in high speed rotary machines that have a compressor wheel and a turbine wheel that generate large axial aerodynamic forces that increase with speed.

대표청구항 ▼

[ What we claim is:] [1.] A thrust load compensating system for a turbomachine, comprising:a power head having a compressor and a turbine with the compressor having a compressor wheel and a compressor diffuser and the turbine having a turbine wheel, the compressor wheel and the turbine wheel dispose

[ What we claim is:] [1.] A thrust load compensating system for a turbomachine, comprising:a power head having a compressor and a turbine with the compressor having a compressor wheel and a compressor diffuser and the turbine having a turbine wheel, the compressor wheel and the turbine wheel disposed on a common shaft rotatably supported by a compliant foil hydrodynamic fluid film journal bearing and a bilateral compliant foil hydrodynamic fluid film thrust bearing;a rotary machine with a shaft having one end coupled to the compressor end of said power head common shaft and a free end rotatably supported by a compliant foil hydrodynamic fluid film journal bearing;a fixed end cap mounted over the free end of said rotary machine shaft; anda separate tubular conduit extending directly from said compressor to the interior of said fixed end cap to provide compressor bleed air having a gauge pressure that varies approximately with the square of turbomachine speed directly to the free end of said rotary machine shaft.