JPS59157939A - Rotary anode x-ray tube - Google Patents

Rotary anode x-ray tube

Info

Publication number
JPS59157939A
JPS59157939A JP58030734A JP3073483A JPS59157939A JP S59157939 A JPS59157939 A JP S59157939A JP 58030734 A JP58030734 A JP 58030734A JP 3073483 A JP3073483 A JP 3073483A JP S59157939 A JPS59157939 A JP S59157939A
Authority
JP
Japan
Prior art keywords
rotor
fine powder
ray tube
wall surface
rotary anode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP58030734A
Other languages
Japanese (ja)
Inventor
Hiroshi Uchiumi
内海　宏
Isao Miyano
勲 宮野
Shigeru Tachiki
茂 立木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP58030734A priority Critical patent/JPS59157939A/en
Publication of JPS59157939A publication Critical patent/JPS59157939A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00—X-ray tubes
    • H01J35/02—Details
    • H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
    • H01J35/08—Anodes; Anti cathodes
    • H01J35/10—Rotary anodes; Arrangements for rotating anodes; Cooling rotary anodes
    • H01J35/101—Arrangements for rotating anodes, e.g. supporting means, means for greasing, means for sealing the axle or means for shielding or protecting the driving
    • H01J35/1017—Bearings for rotating anodes

Abstract

PURPOSE:To eliminate any factor for deteriorating the voltage resistance characteristic, by maching the internal wall surface of cylindrical rotor in such a shape as the fine powder generated by friction of bearing, etc. can easily be trapped. CONSTITUTION:The cross section of internal wall surface 1a of rotor 1 is machined in the form of sawtooth. With such rotor structure, fine powder from the bearing, etc. is trapped by the sawtooth areas and voltage resistance characteristic of rotary anode X-ray tube can be improved by reducing the amount of fine powder to be sprayed outside, consequently the service life can be extended up to about 1.5 times of that of existing device.

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は長期間に亘り、耐電圧特性が劣化しないように
改良した回転陽極Ｘ線管に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rotating anode X-ray tube that has been improved so that its withstand voltage characteristics do not deteriorate over a long period of time.

〔従来技術〕[Prior art]

回転陽極Ｘ線管の陽極を回転させて使用していると、軸
受部等から回転に伴って各種使用材料の微粉末すなわち
摩耗粉末が発生する。When the anode of a rotating anode X-ray tube is rotated and used, fine powder of various materials used, that is, abrasion powder is generated from the bearing portion and the like as the anode rotates.

従来の回転陽極Ｘ線管においては、軸受部な囲み、回転
力な発生する円筒状ロータの内壁面が平滑に仕上げられ
ているために、上記摩耗粉は比較的容易にロータ外部に
飛散する。このように飛散した摩耗粉末は、陰陽極間の
高圧電界にさらされ、バルブ内壁などに付着して漬面放
電等を発生させ、耐電圧特性劣化の原因になっ、ていた
。In conventional rotating anode X-ray tubes, the abrasion particles are relatively easily scattered to the outside of the rotor because the bearings and the inner wall surface of the cylindrical rotor, which generates the rotational force, are finished smooth. The abrasion powder thus scattered is exposed to a high-voltage electric field between the anode and the anode, and adheres to the inner wall of the bulb, causing surface discharge, etc., and causing deterioration of withstand voltage characteristics.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、前記摩耗粉な極力ロータ内部にとじこ
めることにより耐電圧特性の劣化要因を排除した回転陽
極Ｘ線管を提供することにある。An object of the present invention is to provide a rotating anode X-ray tube that eliminates the cause of deterioration of withstand voltage characteristics by confining the abrasion powder inside the rotor as much as possible.

〔発明の概要〕[Summary of the invention]

上記目的を達成するために本発明においては、従来平滑
に仕上げられていた円筒状ロータの内壁面を、軸受部等
の摩耗により生じた微粉末がトラップされやすい形状に
加工を施し、ロータ外部に微粉末が飛散し難い構造とし
た。In order to achieve the above object, in the present invention, the inner wall surface of the cylindrical rotor, which has conventionally been smooth, is processed into a shape that easily traps fine powder generated by wear of bearings, etc. It has a structure that prevents fine powder from scattering.

〔発明の実施例〕[Embodiments of the invention]

第１図は本発明による実施例の要部断面図で、１はロー
タ、１ａは断面が鋸歯状に加工されたロータ内壁面、２
は軸受、３は外スリーブ（固定部）、４は内スリーブ、
５は電子ビームに射突されてＸ線を放射するターゲット
である。FIG. 1 is a sectional view of a main part of an embodiment according to the present invention, in which 1 is a rotor, 1a is an inner wall surface of the rotor whose cross section is machined into a sawtooth shape, and 2
is the bearing, 3 is the outer sleeve (fixed part), 4 is the inner sleeve,
Reference numeral 5 denotes a target that emits X-rays upon being hit by an electron beam.

この様なロータ構造とすることにより、微粉末は鋸歯状
加工部にトラップされることになり、外部に飛散する微
粉末の量を従来の１１５以下にできた。By adopting such a rotor structure, the fine powder is trapped in the serrated portion, and the amount of fine powder scattered outside can be reduced to 115 or less compared to the conventional rotor.

ロータ内壁面の加工例としては、上記のように鋸歯状に
形成する以外に、溝状乃至は突出状の任意の加工形状と
することができる。又上記形状の加工部は、ロータ内壁
面に全面に設けたり或いはトラップ効果の大きい微粉末
の飛散通路部へ設げてもよい。As an example of machining the inner wall surface of the rotor, in addition to the sawtooth shape as described above, any shape such as a groove shape or a protrusion shape can be formed. Further, the processed portion having the above shape may be provided on the entire inner wall surface of the rotor, or may be provided in a fine powder scattering passage where the trapping effect is large.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明に従えば、回転陽極Ｘ線管
の耐電圧特性な向上することができ、寿命を従来装置の
ほぼ１．５倍に延長することができろ。As explained above, according to the present invention, the withstand voltage characteristics of the rotating anode X-ray tube can be improved, and the lifespan can be extended approximately 1.5 times that of the conventional device.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明実施例の要部断面図である。 １・・・ロータ、１ａ・・・鋸歯状形状のロータ内壁面
、２・・・軸受。 、、、−−、、′ 第　　１　　図 。アFIG. 1 is a sectional view of a main part of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Rotor, 1a... Sawtooth-shaped rotor inner wall surface, 2... Bearing. ,,,−−,,′ Fig. 1. a

Claims (1)

【特許請求の範囲】[Claims] 回転陽極の軸受部を囲み、回転力を発生する円筒状ロー
タの内壁面に、摩耗粉等をトラップする加工部を設けた
ことを特徴とする回転陽極Ｘ線管。A rotating anode X-ray tube characterized in that a processed part for trapping wear particles and the like is provided on the inner wall surface of a cylindrical rotor that surrounds a bearing part of the rotating anode and generates rotational force.
JP58030734A 1983-02-28 1983-02-28 Rotary anode x-ray tube Pending JPS59157939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58030734A JPS59157939A (en) 1983-02-28 1983-02-28 Rotary anode x-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58030734A JPS59157939A (en) 1983-02-28 1983-02-28 Rotary anode x-ray tube

Publications (1)

Publication Number Publication Date
JPS59157939A true JPS59157939A (en) 1984-09-07

Family

ID=12311894

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58030734A Pending JPS59157939A (en) 1983-02-28 1983-02-28 Rotary anode x-ray tube

Country Status (1)

Country Link
JP (1) JPS59157939A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007179888A (en) * 2005-12-28 2007-07-12 Hitachi Medical Corp Direct current high voltage vacuum apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007179888A (en) * 2005-12-28 2007-07-12 Hitachi Medical Corp Direct current high voltage vacuum apparatus
JP4673212B2 (en) * 2005-12-28 2011-04-20 株式会社日立メディコ DC high voltage vacuum equipment

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