Low speed canned motor

Details Low speed canned motor Low speed canned motor

2007-07-03

2007-07-03

Lam, Thanh (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S090000

Reexamination Certificate

active

10871236

ABSTRACT:
A canned motor has an L3/D4ratio of less than 50, with one bearing on one end of the rotor assembly configured to resist longitudinal displacement of the rotor as by an axial shaft load, and another bearing on the other end of the rotor assembly configured to allow limited longitudinal displacement of the rotor assembly within the bearing as from thermal expansion, lengthwise adjustment or pressure from an axial shaft load. The rotor assembly may include a center shaft coaxially extended through a hollow shaft, with rotor windings mounted on the hollow shaft, with the first bearing positioned on one end of the hollow shaft and the second bearing mounted on the second hollow shaft end. A cap and nut assembly on the second hollow shaft end, into which the rotor shaft end is threaded, provides for adjusting the effective rotor shaft length protruding from the motor, and for replacement of the rotor shaft within the hollow shaft without removing the rotor assembly from motor.

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McAnn, L. Thomas, “H-Coal Pilot Plant —Topical Report —Rotating Equipment Test Program (with Separate Proprietary Appendix)”, Jun. 1983, pp. 1-4, Ashland Synthetic Fuels, Inc., Ashland, KY (under contract with US Dept of Energy —DE-AC05-76ET1014.

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