JPH05290746A - Cathode body-structure of magnetron - Google Patents
Cathode body-structure of magnetronInfo
- Publication number
- JPH05290746A JPH05290746A JP9634292A JP9634292A JPH05290746A JP H05290746 A JPH05290746 A JP H05290746A JP 9634292 A JP9634292 A JP 9634292A JP 9634292 A JP9634292 A JP 9634292A JP H05290746 A JPH05290746 A JP H05290746A
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- support
- sleeve
- heater
- wire
- 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
Links
Landscapes
- Microwave Tubes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、マグネトロンの陰極
構体に関する。FIELD OF THE INVENTION The present invention relates to a cathode assembly of a magnetron.
【０００２】[0002]
【従来の技術】従来、例えばパルスマグネトロン等に使
用されている陰極構体は、図４に示すように構成されて
いる。図中の符号１はスリ−ブサポ−ト、２はカソ−ド
スリ−ブ、３は電子放出部、４，５はカソ−ドサポ−
ト、６，７はエンドシ−ルド、８はワイヤ９にアルミナ
被覆層１０が形成されてなるヒ−タ、１１は径小サポ−
ト、１２はアルミナセラミックスからなる絶縁筒、１３
はＮｉワイヤである。尚、絶縁筒１２は、ヒ−タ８の端
部とカソ−ドスリ−ブ２との接触を防止し、且つヒ−タ
８がカソ−ドスリ−ブ２の中央に保持されるために設け
られたものである。2. Description of the Related Art Conventionally, a cathode assembly used in, for example, a pulse magnetron is constructed as shown in FIG. In the figure, reference numeral 1 is a sleeve support, 2 is a cathode sleeve, 3 is an electron emitting portion, and 4 and 5 are cathode supports.
, 6 and 7 are end shields, 8 is a heater in which the alumina coating layer 10 is formed on the wire 9, and 11 is a small diameter support.
, 12 is an insulating cylinder made of alumina ceramics, 13
Is a Ni wire. The insulating cylinder 12 is provided to prevent contact between the end of the heater 8 and the cathode sleeve 2, and to hold the heater 8 in the center of the cathode sleeve 2. It is a thing.
【０００３】製造に当たっては、電子放出部３、カソ−
ドサポ−ト４，５、エンドシ−ルド６，７を組立てたカ
ソ−ドスリ−ブ２とスリ−ブサポ−ト１とをろう付けす
る。そして、ヒ−タ８のワイヤ９から絶縁筒１２を挿入
し、Ｎｉリボン１３を絶縁筒１２の下部のワイヤ９に巻
き付けて溶接を行なう。その後、ヒ−タ８のワイヤ９の
先端を径小サポ−ト１１の切欠きに合わせてＰｔリボン
（図示せず）を巻き付かせた後、真空中で図の右横方向
から電子ビ−ムろう付けを行なう。こうして組立てを行
なったヒ−タ８をカソ−ドスリ−ブ２内へ挿入する。In manufacturing, the electron emitting portion 3 and the cathode
The sleeve support 2 and the sleeve support 1 in which the support supports 4 and 5 and the end shields 6 and 7 are assembled are brazed. Then, the insulation cylinder 12 is inserted from the wire 9 of the heater 8, the Ni ribbon 13 is wound around the wire 9 below the insulation cylinder 12, and welding is performed. After that, the tip of the wire 9 of the heater 8 is aligned with the notch of the small diameter support 11 and a Pt ribbon (not shown) is wound around it. Perform brazing. The heater 8 thus assembled is inserted into the cathode sleeve 2.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記のよう
な従来のマグネトロンの陰極構体においては、次のよう
な不都合がある。 (1) アルミナセラミックスからなる絶縁筒１２は、高価
である。However, the conventional magnetron cathode structure as described above has the following disadvantages. (1) The insulating cylinder 12 made of alumina ceramics is expensive.
【０００５】(2) 絶縁筒１２の内壁面とヒ−タ８表面の
アルミナ被覆層１０とが接触を起こし、クラックや剥が
れが生じ易い。その結果、断線や温度分布特性劣化など
の悪影響を及ぼす。 (3) ヒ−タ８のワイヤ９が細長いため、不安定である。 (4) ワイヤ９の先端を径小サポ−ト１１の切欠きに真空
中で図の右横方向から電子ビ−ムろう付けを行なうと、
絶縁筒１２が高熱でクラックを起こし易い。(2) The inner wall surface of the insulating cylinder 12 and the alumina coating layer 10 on the surface of the heater 8 come into contact with each other, and cracks or peeling are likely to occur. As a result, there are adverse effects such as disconnection and deterioration of temperature distribution characteristics. (3) Since the wire 9 of the heater 8 is elongated, it is unstable. (4) When the tip of the wire 9 is brazed to the notch of the small-diameter support 11 in vacuum from the right lateral direction in the figure,
The insulating tube 12 is likely to crack due to high heat.
【０００６】この発明は、以上のような不都合をなく
し、アルミナ被覆層のクラックや剥がれが起きず、断線
や温度分布特性など悪影響を及ぼすことのないマグネト
ロンの陰極構体を提供することを目的とする。It is an object of the present invention to eliminate the above-mentioned inconveniences and to provide a cathode structure of a magnetron which does not cause cracking or peeling of the alumina coating layer and has no adverse effects such as disconnection and temperature distribution characteristics. ..
【０００７】[0007]
【課題を解決するための手段】この発明は、スリ−ブサ
ポ−トに支持されたカソ−ドスリ−ブの外周壁に電子放
出部が設けられ、且つカソ−ドスリ−ブの内側にワイヤ
にアルミナ被覆層が形成されてなるヒ−タが配設された
マグネトロンの陰極構体において、ヒ−タのワイヤの一
端が、カソ−ドスリ−ブの下端近くに位置する内側径小
サポ−トの一端に溶接により固着され、この径小サポ−
トの他端が内側径大サポ−トの先端孔に挿入されビ−ム
溶着されてなるマグネトロンの陰極構体である。SUMMARY OF THE INVENTION According to the present invention, an electron emitting portion is provided on an outer peripheral wall of a cathode sleeve supported by a sleeve support, and an alumina wire is provided inside the cathode sleeve. In the magnetron cathode assembly in which the heater having the coating layer is arranged, one end of the heater wire is connected to one end of the small inside diameter support located near the lower end of the cathode sleeve. Secured by welding, this small diameter support
The other end of the magnet is a cathode assembly of the magnetron, which is inserted into the tip hole of the large diameter support and welded to the beam.
【０００８】[0008]
【作用】この発明によれば、ヒ−タの露出したワイヤの
長さを短く出来るので、このワイヤとカソ−ドスリ−ブ
との接触がなくなり、従来使用した絶縁筒が不要とな
る。そして、アルミナ被覆層のクラックや剥がれが起き
ず、断線や温度分布特性など悪影響を及ぼすことがな
い。又、内側径大サポ−トを採用したため、ヒ−タ全体
の耐振強度が増す。According to the present invention, since the length of the exposed wire of the heater can be shortened, there is no contact between this wire and the cathode sleeve, and the conventionally used insulating cylinder is not required. Then, the alumina coating layer does not crack or peel off, and there is no adverse effect such as disconnection or temperature distribution characteristics. In addition, the large inner diameter support increases the vibration resistance of the entire heater.
【０００９】[0009]
【実施例】以下、図面を参照して、この発明の一実施例
を詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings.
【００１０】この発明によるマグネトロンの陰極構体は
図１〜図３に示すように構成され、図１は全体を示し、
図２はワイヤと径小サポ−トとの接続箇所を拡大して示
し、図３は内側径小サポ−トと内側径大サポ−トとの接
続箇所を拡大して示している。The cathode assembly of the magnetron according to the present invention is constructed as shown in FIGS. 1 to 3, and FIG. 1 shows the whole structure.
FIG. 2 is an enlarged view of a connection portion between the wire and the small diameter support, and FIG. 3 is an enlarged view of a connection portion between the inner diameter small support and the inner diameter large support.
【００１１】即ち、Ｍｏからなる逆漏斗状の外側スリ−
ブサポ−ト１にＭｏからなるカソ−ドスリ−ブ２が支持
され、このカソ−ドスリ−ブ２の外周壁の一部に電子放
出部３が設けられている。この電子放出部３の両端はそ
れぞれカソ−ドサポ−ト４，５に固着され、このカソ−
ドサポ−ト４，５にはエンドシ−ルド６，７が取付けら
れている。更に、カソ−ドスリ−ブ２の内側には、Ｗか
らなるワイヤ９にＡｌ2 Ｏ3 のようなアルミナ被覆層１
０が形成されてなる螺旋状ヒ−タ８が配設されている。
このヒ−タ８の一端はカソ−ドスリ−ブ２内面に固着さ
れ、他端つまりスリ−ブサポ−ト１側の露出したワイヤ
９は、カソ−ドスリ−ブ２の下端近くに位置するＭｏか
らなる内側径小サポ−ト１１の一端に、溶接により固着
されている。そして、この内側径小サポ−ト１１の他端
が、Ｎｉからなる内側径大サポ−ト１４の先端孔１４ａ
に挿入されビ−ム溶着されている。尚、外側のスリ−ブ
サポ−ト１と、内側の径小サポ−ト１１および内側径大
サポ−ト１４とは、同軸的に配設されている。That is, an outer funnel-shaped outer sleeve made of Mo.
A cathode sleeve 2 made of Mo is supported on the bus support 1, and an electron emitting portion 3 is provided on a part of an outer peripheral wall of the cathode sleeve 2. Both ends of the electron emitting portion 3 are fixed to the cathode supports 4 and 5, respectively.
End shields 6 and 7 are attached to the support ports 4 and 5. Furthermore, inside the cathode sleeve 2, a wire 9 made of W is coated with an alumina coating layer 1 such as Al 2 O 3.
A spiral heater 8 formed of 0 is arranged.
One end of this heater 8 is fixed to the inner surface of the cathode sleeve 2, and the other end, that is, the exposed wire 9 on the sleeve support 1 side, is exposed from the Mo located near the lower end of the cathode sleeve 2. Is fixed to one end of the small inside diameter support 11 by welding. The other end of the small inside diameter support 11 has a tip hole 14a of the large inside diameter support 14 made of Ni.
And is welded to the beam. The sleeve support 1 on the outer side, the small diameter support 11 and the large diameter support 14 on the inner side are coaxially arranged.
【００１２】このような陰極構体の製造に当たっては、
先ず図２に示すように、ヒ−タ８の露出したワイヤ９を
径小サポ−ト１１の一端切欠部１１ａに当てる。そし
て、径小サポ−ト１１の外周にＰｔリボン１５を巻い
て、矢印で示す方向からビ−ム溶接を行ない接続する。
次に、図３に示すように、径小サポ−ト１１の他端を径
大サポ−ト１４の先端孔１４ａに挿入し、径大サポ−ト
１４に設けた径方向の溶接孔１６を通してア−ク溶接を
行ない接続する。その後、接続されたヒ−タ８，径小サ
ポ−ト１１および径大サポ−ト１４をカソ−ドスリ−ブ
２内に挿入し、ヒ−タ８の一端をカソ−ドスリ−ブ２の
先端Ａで溶接固着する。従って、この実施例では、次の
ような作用効果が得られる。 (1) 従来使用していた絶縁筒を省略出来る。 (2) ヒ−タ８の露出したワイヤ９の長さが短縮され、そ
の短縮された部分を径大サポ−ト１４で補っているの
で、ヒ−タ８全体の耐振強度が増す。In manufacturing such a cathode assembly,
First, as shown in FIG. 2, the exposed wire 9 of the heater 8 is applied to the one-end cutout 11a of the small diameter support 11. Then, the Pt ribbon 15 is wound around the outer periphery of the small-diameter support 11, and beam welding is performed from the direction indicated by the arrow to connect them.
Next, as shown in FIG. 3, the other end of the small-diameter support 11 is inserted into the tip hole 14a of the large-diameter support 14, and is passed through the radial welding hole 16 provided in the large-diameter support 14. Perform arc welding and connect. After that, the connected heater 8, small diameter support 11 and large diameter support 14 are inserted into the cathode sleeve 2, and one end of the heater 8 is attached to the tip of the cathode sleeve 2. Weld and fix at A. Therefore, in this embodiment, the following effects can be obtained. (1) The insulating cylinder used conventionally can be omitted. (2) Since the length of the exposed wire 9 of the heater 8 is shortened and the shortened portion is supplemented by the large diameter support 14, the vibration resistance of the entire heater 8 is increased.
【００１３】(3) ヒ−タ８全体の振動強度が増している
ため、ヒ−タ８とカソ−ドスリ−ブ２との接触がなくな
り、アルミナ被覆層１０のクラックや剥がれが起きず、
断線や温度分布特性の劣化などが起こり難い。(3) Since the vibration strength of the entire heater 8 is increased, the contact between the heater 8 and the cathode sleeve 2 is eliminated, and the alumina coating layer 10 is not cracked or peeled off.
Breakage and deterioration of temperature distribution characteristics are unlikely to occur.
【００１４】(4) 径大サポ−ト１４に径方向の溶接孔１
６を設けているので、径小サポ−ト１１と径大サポ−ト
１４を嵌合させている箇所に直接低出力のア−ク溶接が
行なえる。(4) Large-diameter support 14 has radial welding holes 1
Since 6 is provided, low-power arc welding can be directly performed at the place where the small diameter support 11 and the large diameter support 14 are fitted.
【００１５】[0015]
【発明の効果】以上説明したようにこの発明によれば、
ヒ−タのワイヤの一端が、カソ−ドスリ−ブの下端近く
に位置する径小サポ−トの一端に溶接により固着され、
この径小サポ−トの他端が径大サポ−トの先端孔に挿入
されビ−ム溶着されているので、カソ−ドスリ−ブとヒ
−タのワイヤが接触することなく、アルミナ被覆層のク
ラックや剥がれが起きない。その結果、断線や温度分布
特性など悪影響を及ぼすことはない。As described above, according to the present invention,
One end of the heater wire is fixed by welding to one end of the small diameter support located near the lower end of the cathode sleeve,
Since the other end of this small diameter support is inserted into the tip hole of the large diameter support and welded to the beam, the cathode sleeve and the heater wire do not come into contact with each other, and the alumina coating layer Does not crack or peel off. As a result, there are no adverse effects such as disconnection and temperature distribution characteristics.
【図１】この発明の一実施例に係るマグネトロンの陰極
構体を示す縦断面図。FIG. 1 is a vertical sectional view showing a cathode assembly of a magnetron according to an embodiment of the present invention.
【図２】この発明のマグネトロンの陰極構体におけるワ
イヤと径小サポ−トとの接続箇所を拡大して示す横断面
図。FIG. 2 is a cross-sectional view showing an enlarged connection portion between a wire and a small diameter support in the cathode assembly of the magnetron of the present invention.
【図３】この発明のマグネトロンの陰極構体における径
小サポ−トと径大サポ−トとの接続箇所を拡大して示す
横断面図。FIG. 3 is an enlarged transverse cross-sectional view showing a connecting portion between a small diameter support and a large diameter support in the cathode structure of the magnetron of the present invention.
【図４】従来のマグネトロンの陰極構体を示す縦断面
図。FIG. 4 is a vertical sectional view showing a cathode assembly of a conventional magnetron.
１…外側スリ−ブサポ−ト、２…カソ−ドスリ−ブ、３
…電子放出部、４，５…カソ−ドサポ−ト、６，７…エ
ンドシ−ルド、８…ヒ−タ、９…ワイヤ、１０…アルミ
ナ被覆層、１１…内側径小サポ−ト、１４…内側径大サ
ポ−ト。1 ... Outer sleeve support, 2 ... Cascade sleeve, 3
... Electron emitting part, 4,5, cathode support, 6,7 ... end shield, 8 ... heater, 9 ... wire, 10 ... alumina coating layer, 11 ... inner diameter small support, 14 ... Large inner diameter support.
Claims (1)
ソ−ドスリ−ブの外周壁に電子放出部が設けられ、且つ
上記カソ−ドスリ−ブの内側にワイヤにアルミナ被覆層
が形成されてなるヒ−タが配設され、該ヒ−タの端部が
上記スリ−ブサポ−トの内側に配置された内側サポ−ト
に溶接されてなるマグネトロンの陰極構体において、 上記ヒ−タのワイヤの一端が、上記カソ−ドスリ−ブの
下端近くに位置する内側径小サポ−トの一端に溶接によ
り固着され、この径小サポ−トの他端が内側径大サポ−
トの先端孔に挿入されビ−ム溶着されてなることを特徴
とするマグネトロンの陰極構体。1. An electron emitting portion is provided on an outer peripheral wall of a cathode sleeve supported by an outer sleeve support, and an alumina coating layer is formed on a wire inside the cathode sleeve. A cathode structure of the magnetron, wherein the heater is provided and an end portion of the heater is welded to an inner support disposed inside the sleeve support. One end of the wire is fixed by welding to one end of an inside diameter small support located near the lower end of the above-mentioned cathode sleeve, and the other end of this inside diameter small support is inside diameter large support.
A cathode assembly of a magnetron, characterized in that the cathode assembly is inserted into a tip hole of a cathode and welded to a beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9634292A JPH05290746A (en) | 1992-04-16 | 1992-04-16 | Cathode body-structure of magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9634292A JPH05290746A (en) | 1992-04-16 | 1992-04-16 | Cathode body-structure of magnetron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05290746A true JPH05290746A (en) | 1993-11-05 |
Family
ID=14162341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9634292A Pending JPH05290746A (en) | 1992-04-16 | 1992-04-16 | Cathode body-structure of magnetron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05290746A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013092361A (en) * | 2012-12-28 | 2013-05-16 | Mitsubishi Electric Corp | Heating cooker and method for manufacturing the same |
| CN103681175A (en) * | 2012-09-13 | 2014-03-26 | E2V技术（英国）有限公司 | Magnetron cathode |
-
1992
- 1992-04-16 JP JP9634292A patent/JPH05290746A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103681175A (en) * | 2012-09-13 | 2014-03-26 | E2V技术（英国）有限公司 | Magnetron cathode |
| JP2013092361A (en) * | 2012-12-28 | 2013-05-16 | Mitsubishi Electric Corp | Heating cooker and method for manufacturing the same |
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