JPS58135555A - Rotary anode of x-ray tube - Google Patents

Abstract

PURPOSE:To obtain a long life by molding a target plate and a stanchion with a heat resisting metal in one body and by inserting a collar-like binder between a stanchion base and a rotor end so as to fix the coupled binding section by brazing. CONSTITUTION:A target plate 1' and a stanchion 2' are molded with molybdenum in one body, and a stanchion base 2a' is screwed into the center of a collar-like binder 9, then this portion is fixed by brazing. Next, the end of a rotor outside cylinder 4' is coupled with the collar-like binder 9, and the coupled section is fixed by brazing. Iron, nickel, molybdenum, or a heat resisting alloy made of them as a principal constituent are used for the material of the collar- like binder 9, and the binder 9 is heated locally by high frequency induction heating or other measures so as to melt the brazing material, thus a temperature rise outside the brazed section can be avoided.

Description

【発明の詳細な説明】 本９に明は大容量管に用いて長い回転痔命が得られるＸ
縁管回転陽ｌＩｉに関する。[Detailed description of the invention] According to the present invention, X is used for large-capacity tubes to obtain a long rolling hemorrhoid life.
Regarding the limbal tube rotation positive lIi.

第１図は従来のＸ線管回転陽極な示す。図示してない陰
極から放出された電子は陰陽極間の高電圧に加速され高
速電子ビームとなってターゲット板ＩＫ射突してＸ線を
放射させる。大容量管では大径かつ厚いターゲツト板が
必要となる。ターゲツト板ｌの中心孔に支柱２の端部を
挿入しナツト３で締付けて取付ける。支柱２の他端は、
鋼製のロータ４に鋳込まれ一体になっている。ロータ４
の周囲の管外には回転磁界を生ずるコイルが配置され、
ロータ４は誘導電動機回転子として回転する。またロー
タ４は、固定部８に軸受７，７を介して支承された回転
軸５にねじ６により締付は固定されている。しかしター
ゲツト板１が大形、大重量になるに伴い、使用時高速回
転中に、ターゲツト板１を支柱２にナツト３で締付は取
付けた部分が緩み易くなり、一旦緩むと、組立時にダイ
ナミックバランスまでとったのが、バランスくずれとな
り、回転音が大きくなり、軸受の損傷が生じ【、回転部
の変形が生じＸｉＩ放射が阻害されたり、回転が停止し
たりするなどして、Ｘ＠管が短寿命に終ってしまうとい
う問題があった。FIG. 1 shows a conventional X-ray tube rotating anode. Electrons emitted from a cathode (not shown) are accelerated by a high voltage between the cathode and anode, become a high-speed electron beam, and strike the target plate IK to emit X-rays. Large capacity tubes require large diameter and thick target plates. Insert the end of the support column 2 into the center hole of the target plate 1 and tighten it with a nut 3 to attach it. The other end of the pillar 2 is
It is cast and integrated into the steel rotor 4. Rotor 4
A coil that generates a rotating magnetic field is placed outside the tube around the
The rotor 4 rotates as an induction motor rotor. Further, the rotor 4 is fastened to a rotating shaft 5 supported by a fixed portion 8 via bearings 7, 7 with a screw 6. However, as the target plate 1 becomes larger and heavier, the part where the target plate 1 is attached to the column 2 with the nut 3 tends to loosen during high-speed rotation during use. Although the balance was maintained, the balance became unbalanced, the rotation noise became louder, and the bearings were damaged. The problem was that it ended up having a short lifespan.

本発明の目的は、大形のターゲツト板を用いても長期間
安定に回転する回転寿命の畏いｘ＃ｉＩｔ１ｇ１転陽他
４を提供することＫある。An object of the present invention is to provide a rotary rotor with a long rotation life that allows stable rotation for a long period of time even when a large target plate is used.

上記目的を達成するために本発明においては、ターゲツ
ト板と支柱とを例えばモリブデンなどの耐熱金属で一体
成形して両者の結合部で緩みが生じないようＫし、支柱
基部とロータ端部との間につば状結合体を介入させ、こ
の結合体の支柱基部。In order to achieve the above object, in the present invention, the target plate and the support column are integrally molded from a heat-resistant metal such as molybdenum, so that there is no loosening at the joint between the two, and the support base and the rotor end are connected to each other. A collar-like joint is interposed between the strut bases of this joint.

ロータ基部との嵌合結合部をろう接固着して一体化させ
、更にターゲツト板と支柱とを一体成形したため従来の
如き組立順序な採れないことに対処して、ロータを回転
駆動力発生用の外側円筒と、この円筒と嵌合する内側円
筒の２重構造とし、あらかじめ固定ｉｋ軸軸受介して回
転自在に支承させた内側円筒の外＠Ｋ、既に上記の如く
支柱に結合されている外側円筒なかぶせて嵌合させ、内
。The fitting joint with the rotor base is soldered and fixed, and the target plate and support column are integrally molded. The outer cylinder has a double structure consisting of an outer cylinder and an inner cylinder that fits into this cylinder, and is rotatably supported via a fixed ik shaft bearing. Cover it and fit it inside.

外側円筒を、直径の大きいターゲツト板から遠く、作業
なしや−ｔい開放端側で＃！接して固着させるようにし
た。Place the outer cylinder far from the large-diameter target plate, with the open end facing away from the target plate. I tried to make it stick by touching it.

ｌｌｍ２図は本発明の一実施例図である。ターゲラなど
で一体成形しである。支柱基部２ＪＩをつば状結合体９
の中心に螺着させ、この部分なろうづけして固着する。Figure llm2 is a diagram of one embodiment of the present invention. It is integrally molded with Targera etc. Connect the strut base 2JI to the collar-like joint body 9
Screw it into the center of the hole, and solder this part to secure it in place.

次につば状結合体９Ｋ、ロータの外側円筒４の端部な嵌
合させ、この嵌合部なろうづけして固着する。この場合
、つば状結合体９の材料には、鉄、ニッケル、モリブデ
ン、又はそれらを主成分とする耐熱合金を用い、結合体
９を高周波銹導加熱またはその他の方法で局部的に加熱
してろう材を溶かし、かつ、ろう付は部以外の温度上昇
を避けることＫより、材料の不必要な熱履歴がなくなり
、材料の強度低下などの問題をさけられるので、従来の
鋳造法で傘形鋼製ロータ頂部に支柱基部な鋳込んだもの
より丈夫になる。こうして、ターゲット板、支柱、つば
状結合体、ロータの外側円筒を一体化した構造体の組立
寸法精度が高速回転使用に対し不十分な場合は、固着組
立後に切削加工により所要寸法精度になるように仕上加
工する。この様な一体化構体は、第１図に示した例の如
く、回転軸５の頂部にロータ４のｗ４部なオーじ止めす
ることは、ターゲツト板１′が邪魔になってできない。Next, the collar-shaped joint 9K is fitted to the end of the outer cylinder 4 of the rotor, and this fitted part is fixed by brazing. In this case, the material of the brim-like joint 9 is iron, nickel, molybdenum, or a heat-resistant alloy containing these as main components, and the joint 9 is locally heated by high-frequency induction heating or other methods. By melting the filler metal and avoiding temperature rises in areas other than the brazing part, unnecessary heat history of the material is eliminated and problems such as a decrease in material strength can be avoided. It is more durable than a steel rotor top with a strut base cast in it. In this way, if the assembly dimensional accuracy of the structure that integrates the target plate, struts, collar-like joints, and outer cylinder of the rotor is insufficient for high-speed rotation use, the required dimensional accuracy can be achieved by cutting after fixing the assembly. Finish processing. In such an integrated structure, as in the example shown in FIG. 1, it is impossible to screw the w4 portion of the rotor 4 onto the top of the rotating shaft 5 because the target plate 1' becomes an obstacle.

そのため前述の如く本発明では。Therefore, as mentioned above, in the present invention.

ロータな外側円筒と内側円筒よりなる２重構造とした。It has a double structure consisting of an outer rotor cylinder and an inner cylinder.

本実施例では、第２図に示すようＫ、あらかじめロータ
の内側円筒ｌＯを回転軸５にねじ６で取付けておき、こ
の内側円筒１０に、前記ターゲット板、Ｘ柱、つば状結
合体、ロータの外側円筒よりなる一体化構体の外側円筒
４′を一合支持させ、両円筒を、ターゲツト板から適い
端部溶接部１１でＳａｔ、て固着する。この作業に対し
てはり・−グツト板ｌは邪魔にならない。In this embodiment, as shown in FIG. The outer cylinders 4' of the integrated structure consisting of the outer cylinders of the target plate are integrally supported, and both cylinders are fixed by Sat at a suitable end welding part 11 from the target plate. The beam/gut plate l does not get in the way of this work.

第３図は本発明の他の実施例を示す。本実施例ではロー
タの内側円筒ｌＯは、固定軸８ｍに、軸受７．７′を介
して一転自在に取付けられている。FIG. 3 shows another embodiment of the invention. In this embodiment, the inner cylinder lO of the rotor is rotatably attached to a fixed shaft 8m via a bearing 7,7'.

すなわち第２％に示した実施例では軸受の外輪が固定さ
れ内輪が回転するのに対し、本実施例では内輪が固定さ
れ外輪が回転する。またかかる構造の差のため、固定軸
８ａの端部にナツト１２を締付けて軸受の内輪な固定軸
に固定させ、一方、固定軸８ａ′上端部の軸受７の外輪
な内側円環１０””部と無頼止めねじ６とでくわえ内側
円筒１０’の軸方向位置を定めるようになっている。そ
の他の点は第２図に示した実施例同様である。That is, in the embodiment shown in the second percent, the outer ring of the bearing is fixed and the inner ring rotates, whereas in this embodiment the inner ring is fixed and the outer ring rotates. Also, due to the difference in structure, a nut 12 is tightened on the end of the fixed shaft 8a to fix it to the fixed shaft, which is the inner ring of the bearing, while an inner ring 10'', which is the outer ring of the bearing 7, is located at the upper end of the fixed shaft 8a'. The axial position of the inner cylinder 10' is determined by gripping the inner cylinder 10' with a set screw 6. Other points are similar to the embodiment shown in FIG.

以上説明したように本発四によれば、従来の構造でバラ
ンスくずれ１回転短寿命の原因となり易かったターゲツ
ト板と支柱との結合部が、一体成形法を採用することに
よりバランス（ずれやそれに伴う諸不良を生じなくなり
、しかも組立作業は一体化構造の影譬を受けずに容易に
行なえるので、大容量長寿命の回転陽極Ｘ線管が得られ
る。As explained above, according to the present invention, the joint part between the target plate and the column, which was easily caused by loss of balance in the conventional structure and a shortened life per rotation, has been improved by adopting an integral molding method. Since various defects are not caused and the assembly work can be easily performed without being affected by the integrated structure, a rotating anode X-ray tube with a large capacity and a long life can be obtained.

【図面の簡単な説明】 第１図は従来のＸ線管回転陽極の側断面図、第２．３図
はそれぞれ異なる本発明実施例の側断面図である。 １／、　　２／・・・一体成形したターゲツト板および
支柱、４′・・ロータの外側円筒、７．７′・・・軸受
、８．８・・・固定部、９・・・つば状結合体、１０．
１０　・・ロータの内側円筒、１１・・・、ロータの内
外備円筒端部溶接部。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a conventional X-ray tube rotating anode, and FIGS. 2 and 3 are side sectional views of different embodiments of the present invention. 1/, 2/... integrally molded target plate and strut, 4'... outer cylinder of rotor, 7.7'... bearing, 8.8... fixing part, 9... rib-like connection body, 10.
10... Inner cylinder of the rotor, 11... Welded portions of the inner and outer cylinder ends of the rotor.

Claims (1)

【特許請求の範囲】[Claims] 電子ビームに射央されてＸ線を放射するターゲツト板と
、これを支持する支柱と、支柱を介してターゲツト板を
回転させるロータよりなるＸ線管回転陽ｌｉにおいて、
ターゲツト板と支柱とを耐熱金属で一体成形し、その中
心孔に支柱基部な嵌合したつば状結合体の周辺を、回転
力を生ずるロータの外側円筒端部に嵌合し、前記っは状
結合体の内嵌合結合部なろう接固着して一体化させ、更
に前記一体化構体の外側円筒を、軸受を介して固定部に
回転自在に支承されたロータの内側円筒に嵌合支持させ
、これら両円筒を、ターゲツト板がら遠い端部で＃＊し
て固着させたことを特徴とするＸｍ管回転陽極。An X-ray tube rotation system consists of a target plate that is centered on an electron beam and emits X-rays, a column that supports the plate, and a rotor that rotates the target plate via the column.
The target plate and the strut are integrally molded from heat-resistant metal, and the periphery of the collar-shaped joint that fits into the center hole of the strut base is fitted to the outer cylindrical end of the rotor that generates rotational force, and the The inner fitting joint part of the combined body is brazed and fixed to be integrated, and the outer cylinder of the integrated structure is fitted and supported by the inner cylinder of a rotor rotatably supported by the fixed part via a bearing. , an Xm tube rotating anode characterized in that both of these cylinders are fixed with #* at the end farthest from the target plate.