Four wheel air cycle machine

Details Four wheel air cycle machine Four wheel air cycle machine

1993-07-23

1994-05-10

Bertsch, Richard A.

Refrigeration

Air compressor, cooler and expander type

Motor-type expander

417406, 454 71, F25D 900

Patent

active

053097351

ABSTRACT:
An air cycle machine (10) has four wheels mounted on a common shaft (20) for rotation therewith about a longitudinal axis (12), including a second stage turbine rotor (30) mounted to a first end (20a) of the shaft, a fan rotor (40) mounted to a second end (20b) of the shaft, a first stage turbine rotor (50) mounted to a central portion (20c) of the shaft, a compressor rotor (60) mounted to the central portion of the shaft in back to back relation to the first stage turbine rotor, the first and second stage turbine rotors being operative to extract energy from a flow of compressed air for driving the shaft (20), and the fan rotor (40) and the compressor rotor (60), in rotation about the axis, and first and second hydrodynamic gas film foil bearings (70, 80) for supporting the shaft for rotation about the longitudinal axis (12).

REFERENCES:
patent: 2492672 (1949-12-01), Wood
patent: 3052106 (1962-09-01), Sampietro et al.
patent: 3080728 (1963-03-01), Groves et al.
patent: 3289436 (1966-12-01), Groves et al.
patent: 3428242 (1969-02-01), Rannenberg
patent: 3523428 (1970-08-01), Nagyszalanczy
patent: 3877246 (1975-04-01), Schutze
patent: 4260339 (1981-04-01), Lofts
patent: 4312191 (1982-01-01), Biagini
patent: 4482303 (1984-11-01), Acosta
patent: 4507939 (1985-04-01), Wieland
patent: 4963174 (1990-10-01), Payne
patent: 5113670 (1992-05-01), McAuliffe et al.

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