X-ray tube with a magnetically seated rotary anode

Details X-ray tube with a magnetically seated rotary anode X-ray tube with a magnetically seated rotary anode

1985-01-22

1986-12-09

Church, Craig E.

X-ray or gamma ray systems or devices

Source

Electron tube

310 905, H01J 3504, H01J 3510

Patent

active

046285229

ABSTRACT:
An x-ray tube has a rotary anode which is seated in a magnetic bearing unit which includes catcher bearings for supporting the anode system if the magnetic bearing is turned off or malfunctions. For this purpose the drive shaft of the rotary anode has a substantially conical surface carried thereon which is symmetrical with respect to the rotational axis of the shaft. The conical surface receives the catcher bearings therein with a gap existing between the bearings and the surface during normal operation, and in the event of failure of the magnetic bearing system, functions as a contact surface to limit movement of the shaft and hence of the anode. The conical surface may be formed by two inwardly chamferred rings carried on the shaft with the catcher bearing disposed between the facing chamferred edges. The catcher bearing may be chamferred in a complementary manner and may have a ball bearing assembly therein.

REFERENCES:
patent: 4167671 (1979-09-01), Boden et al.
patent: 4468800 (1984-08-01), Friedel et al.
patent: 4504965 (1985-03-01), Ebersberger

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