Title:
X-RAY TUBE APPARATUS AND X-RAY CT APPARATUS
Document Type and Number:
WIPO Patent Application WO/2018/020895
Kind Code:
A1
Abstract:
This X-ray tube apparatus (101) is provided with: a positive electrode (212) which radiates an X-ray when irradiated with an electron beam; a rotation axis part (301) which is connected to the positive electrode (212); and a rotation bearing which rotatably supports the rotation axis part (301). The rotation bearing comprises: a radial bearing (303) which is arranged on the outer circumference of the rotation axis part and a thrust bearing (304) which is arranged on the bottom surface of the rotation axis part. The radial bearing (303a, 303b) is formed from a ceramic, while the thrust bearing (304) is formed from a metal. The rotation axis part (301) is able to reduce wear of the rotation bearing, while ensuring electrical conductivity by having a conduction part (301A) that electrically connects the positive electrode (212) and the thrust bearing (304) with each other. An X-ray CT apparatus is equipped with this X-ray tube apparatus (101).
Inventors:
MORITO YOSHINORI (JP)
Application Number:
PCT/JP2017/022294
Publication Date:
February 01, 2018
Filing Date:
June 16, 2017
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H01J35/10; A61B6/03; F16C19/12; F16C19/16; F16C33/32; F16C33/62; F16C33/66
Foreign References:
| JPS5951442U | 1984-04-04 | |||
| JPH09115467A | 1997-05-02 | |||
| JPS56144465U | 1981-10-31 | |||
| JPH06176720A | 1994-06-24 | |||
| JP2016133130A | 2016-07-25 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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