Lobed pinion drive shaft for refrigeration compressor

Details Lobed pinion drive shaft for refrigeration compressor Lobed pinion drive shaft for refrigeration compressor

1998-12-03

2000-05-30

Walberg, Teresa

Pumps

Motor driven

Electric or magnetic motor

417243, 415230, F04B 1700

Patent

active

060684577

ABSTRACT:
A refrigeration unit having a compressor includes a refrigerant gas inlet, a drive shaft, and at least one compression stage. At least one compression stage includes at least one impeller with a hub, the hub having a radially lobed bore. The drive shaft has a radially lobed portion complementary to the radially lobed bore of the impeller hub. The lobed portion of the drive shaft is received in the bore to define a coupling for transmitting torque from the drive shaft to the impeller. This coupling may have three lobes. The compressor may have more than one stage and more than one impeller. The first stage impeller is closer to the refrigerant gas inlet than the second stage impeller. The second stage impeller has a hub and radially lobed bore, wherein a second radially lobed portion of the drive shaft can be inserted to define another coupling. The cross-sectional area of this second coupling may be greater than the cross-sectional area of the first coupling. The compressor may be gear driven or direct driven.

REFERENCES:
patent: 3658442 (1972-04-01), Heltmann
patent: 3711225 (1973-01-01), Kolbe et al.
patent: 3913408 (1975-10-01), Moore
patent: 4961260 (1990-10-01), Ferri et al.
patent: 5046932 (1991-09-01), Hoffmann
patent: 5087172 (1992-02-01), Ferri et al.
patent: 5169242 (1992-12-01), Biase et al.
"Packaged Air Cooled CenTraVac", 130-340 Tons/Centrifugal Liquid Chillers/ Refrigeration, DS CTV-9/Jun. 80. P. 6. Author: The Trane Company.

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