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Rotating Anode X-ray Tube

A technology of X-ray tube and rotating anode, applied in the directions of X-ray tube, X-ray tube electrode, X-ray tube cooling, etc., can solve the problems of ball bearing temperature rise, poor thermal conductivity, etc.

Active Publication Date: 2019-04-02
CANON ELECTRON TUBES & DEVICES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the conventional rotating anode type X-ray tube, the anode holder is formed of a member with poor thermal conductivity (including Fe alloy), therefore, the temperature of the ball bearings, especially the temperature of the ball bearings on the side close to the anode target may increase. rise and become higher

Method used

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  • Rotating Anode X-ray Tube
  • Rotating Anode X-ray Tube
  • Rotating Anode X-ray Tube

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0036] figure 1 It is a schematic diagram showing an example of the X-ray tube 100 of the first embodiment.

[0037] The X-ray tube 100 includes a vacuum enclosure 1 , a cathode 2 , an anode target 3 , a rotation mechanism 4 and a cathode support 200 . The X-ray tube 100 is a rotating anode type X-ray tube. In the X-ray tube 100 , a cathode 2 and a substantially umbrella-shaped anode target (target disk) 3 are arranged in a vacuum enclosure 1 facing each other.

[0038] The vacuum peripheral device 1 is exhausted into a high vacuum. The vacuum enclosure 1 includes the cathode 2 and the anode structure 90 inside evacuated to a high vacuum. In addition, the vacuum enclosure 1 is formed of, for example, a glass valve made of glass. In the vacuum enclosure 1, the cathode 2 and the anode target 3 are arranged to face each other. The cathode 2 is held by the cathode support 200 arranged to face the anode target 3, and is arranged so as to deviate (eccentrically) from the tube a...

no. 2 approach

[0060] The X-ray tube 100 of the second embodiment is basically the same as the X-ray tube 100 of the first embodiment, but the members forming the anode holder 18 and the inner member 19 are different from the X-ray tube 100 of the first embodiment.

[0061] image 3 It is a longitudinal cross-sectional view showing the anode assembly 90 of the X-ray tube 100 according to the second embodiment.

[0062] In the X-ray tube 100 of the second embodiment, the anode holder 18 is formed of a magnetic member, and the inner member 19 is formed of a heat conduction promoting member. That is, the X-ray tube 100 of the second embodiment has a structure in which the members constituting the anode holder 18 and the inner member 19 are replaced with those of the X-ray tube 100 of the first embodiment.

[0063] The anode holder 18 of the present embodiment is formed of a magnetic member. The anode holder 18 according to this embodiment has at least one threaded hole portion for screwing th...

Deformed example 1

[0074] The X-ray tube 100 according to Modification 1 of the second embodiment has substantially the same structure as the aforementioned X-ray tube 100 , but differs in the structure of the anode structure 90 .

[0075] Figure 5 It is a vertical cross-sectional view showing an example of an anode structure 90 according to Modification 1 of the second embodiment.

[0076] In Modification 1 of the second embodiment, the anode structure 90 is stretched by the stretching screw 21 to deform a part of the inner member 19 .

[0077] The inner member 19 of Modification 1 is formed with at least one screw hole portion for screwing the tension screw 21 deformed by stretching (pulling in). Here, the screw hole portion is a screw hole in which a screw groove is formed. The screw hole portions are formed at equal intervals in the circumferential direction of the inner member 19 . Preferably, the screw holes are formed near the ball bearings 11 and 12 . For example, three screw holes ar...

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Abstract

The rotating anode type X-ray tube of the embodiment comprises: a rotating cylinder (5), which is fixed with an anode target; a rotating shaft (7), which is coaxially fixed on the inner side of the rotating cylinder; an anode fixing body (18 ), the anode fixed body is arranged between the rotating cylinder and the rotating shaft, extends in the axial direction, and is formed by any one of a magnetic member and a heat conduction promoting member, wherein the magnetic member is formed of a magnetic body, so The thermal conductivity of the heat conduction promoting member is higher than the surrounding thermal conductivity; ball bearings (11, 12), the ball bearings are arranged between the anode fixed body and the rotating shaft; and the inner member (19), the inner member (19) is arranged on Between the anode fixed body (18) and the rotating shaft (7), and connected to the anode fixed body (18) through a connecting member, it is formed of any one of a magnetic member and a heat conduction promoting member and is different from the anode fixed body.

Description

technical field [0001] Embodiments relate to a rotating anode type X-ray tube using a ball bearing in an anode rotating mechanism. [0002] (References to related applications) [0003] This application is based on the prior Japanese Patent Application No. 2015-012991 filed on January 27, 2015 and the prior Japanese Patent Application No. 2015-253985 filed on December 25, 2015, and claims the benefit of priority from them , and the entire contents of the above-mentioned Japanese patent application are incorporated into this application by reference. Background technique [0004] Generally, in a rotary anode type X-ray tube, an eccentric cathode is disposed opposite to a substantially umbrella-shaped anode target in a vacuum enclosure maintained in a vacuum-tight environment. The anode target is rotatably supported by a rotation mechanism. Outside the vacuum enclosure, a stator is arranged corresponding to the rotation mechanism, and drives the rotation mechanism. [0005...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J35/10
CPCH01J2235/1208H01J2235/1295H01J35/107H01J35/1024H01J35/103H01J35/16H01J35/108H01J35/26
Inventor 中林英隆熊抱广之阿武秀郎
Owner CANON ELECTRON TUBES & DEVICES CO LTD