Method for assembling rotors without fixtures

Details Method for assembling rotors without fixtures Method for assembling rotors without fixtures

1990-02-27

1991-07-23

Smith, Leonard E.

Pumps

Motor driven

Electric or magnetic motor

2988802, 29447, F04B 3504

Patent

active

050339419

ABSTRACT:
A method of forming a clearance gap between a shrink fit rotor and a motor housing comprising the steps of heating the rotor until the rotor expands, sliding the heated rotor over a shaft having an axis, bringing the heated rotor into contact with at least one small protrusion on the surface of the motor housing, causing the protrusion to expand toward the heated rotor by transferring heat from the heated rotor to the protrusion, allowing the motor and the protrusion to cool whereby a clearance gap is formed between the rotor and the motor housing as the motor housing cools, and hermetically enclosing the rotor, the motor housing and the shaft within a compressor shell.

REFERENCES:
patent: 3208667 (1965-09-01), Boettcher
patent: 3288357 (1966-11-01), Comstock et al.
patent: 3447738 (1969-06-01), Valbjorn
patent: 3765801 (1973-10-01), Ayling
patent: 4115039 (1978-09-01), Schjelde et al.
patent: 4605362 (1986-08-01), Sturgeon et al.
patent: 4676075 (1987-06-01), Shiibayashi
patent: 4762471 (1988-08-01), Asanuma et al.
patent: 4768936 (1988-09-01), Etemad et al.
patent: 4840545 (1989-06-01), Moilanen

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