X-ray device
AssigneeSiemens Aktiengesellschaft
InventorHerbert Bittl
Life of this patent
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Abstract
An x-ray device has a cathode aligned on a target region in a tube housing with a rotating anode unit. The rotating anode unit is borne to rotate around a rotational axis inside the tube housing. The rotating anode unit has a rotating anode plate with the target region and a shaft rotationally connected with the rotating anode plate. A magnetic bearing supports the shaft without contact in the tube housing. The rotating anode plate has an axial extension facing away from the shaft. The axial extension dips into a fluid-filled receptacle space of the tube housing for heat dissipation. Such an x-ray device allows high rotation speeds of the rotating anode unit, and thus a high operational power.
Claims17
An x-ray device comprising:
- an evacuated tube housing;
- a cathode in said tube housing that emits an electron beam;
- a rotating anode unit mounted in said tube housing to rotate around a rotational axis;
- said rotating anode unit comprising an anode plate having a target region on which said electron beam is incident to emit x-rays therefrom, and a shaft connected to said anode plate at a first side of said anode plate;
- a magnetic bearing that provides contact-free magnetic support of said shaft to allow rotation of said shaft and said anode plate in said housing;
- a receptacle in said tube housing containing a thermally conductive fluid;
- and
- an axial extension extending from said anode plate at a second side thereof, opposite said first side, said axial extension projecting into said receptacle space and contacting said thermally conductive fluid therein to dissipate heat from said anode that arises during emission of said x-rays.
Dependencies are inferred from the claim text.