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JPH053098B2 - - Google Patents
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JPH053098B2 - - Google Patents

Info

Publication number
JPH053098B2
JPH053098B2 JP57203637A JP20363782A JPH053098B2 JP H053098 B2 JPH053098 B2 JP H053098B2 JP 57203637 A JP57203637 A JP 57203637A JP 20363782 A JP20363782 A JP 20363782A JP H053098 B2 JPH053098 B2 JP H053098B2
Authority
JP
Japan
Prior art keywords
vane
strap ring
strap
ring
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.)
Expired - Lifetime
Application number
JP57203637A
Other languages
Japanese (ja)
Other versions
JPS5994333A (en
Inventor
Mamoru Kurokuzuhara
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 JP20363782A priority Critical patent/JPS5994333A/en
Publication of JPS5994333A publication Critical patent/JPS5994333A/en
Publication of JPH053098B2 publication Critical patent/JPH053098B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/18Resonators
    • H01J23/22Connections between resonators, e.g. strapping for connecting resonators of a magnetron

Landscapes

  • Microwave Tubes (AREA)

Description

【発明の詳細な説明】 〔発明の利用分野〕 本発明は、使用時の加熱膨脹、不使用時の冷却
収縮の繰返しに対し、ストラツプリングが疲労破
断事故を生じ難くしたマグネトロン陽極構体に関
する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetron anode structure in which a strap ring is less susceptible to fatigue failure due to repeated heating expansion during use and cooling contraction when not in use.

〔従来技術〕[Prior art]

マグネトロンは周知の如く、内側に半径方向に
突設した偶数枚のベインを有する円筒状アノード
と、ベインを一つおきに短絡接続する、それぞれ
直径の異なる外側および内側ストラツプリングを
備えた陽極構体を用いている。ベインの管軸に近
い端部は電子衝撃により非常に高温になるのに対
し、アノード円筒状部は熱源から離れ、かつ外側
を冷却されているので、ベインほどには温度上昇
しない。その結果、ストラツプリングとベインと
の接続部の管軸からの距離(半径)は、マグネト
ロン動作昇温時には(ベインが半径方向に中心に
向つて伸びるために)、常温時よりも短くなる。
一方、ストラツプリング、特に熱源に近い内側ス
トラツプリングは、昇温に伴つて膨脹する。結
局、ストラツプリングはベインとの接続部の中間
で真円から外側へ張り出した形に変形する。その
ため、使用、不使用の繰返しに伴う疲労によりス
トラツプリングは破断事故を生じ易い。
As is well known, a magnetron has a cylindrical anode having an even number of vanes projecting radially on the inside, and an anode structure having outer and inner strap rings of different diameters that short-circuit every other vane. I am using it. While the end of the vane near the tube axis becomes very hot due to electron bombardment, the cylindrical anode part is away from the heat source and is cooled on the outside, so the temperature does not rise as much as the vane. As a result, the distance (radius) of the connection between the strap ring and the vane from the tube axis becomes shorter when the magnetron is operating at a higher temperature (because the vane extends radially toward the center) than at room temperature.
On the other hand, strap rings, especially inner strap rings that are closer to the heat source, expand as the temperature increases. Eventually, the strap ring deforms from a perfect circle to an outwardly extending shape in the middle of the connection with the vane. Therefore, the strap ring is prone to breakage due to fatigue caused by repeated use and non-use.

この繰返し応力による疲労破断の対策として、
ストラツプリングをベインとの接続部の中間であ
らかじめ真円から外側へわずかに張り出した形に
しておくと、この部分が熱膨張脹に曲り易くな
り、ベインとの接続部近傍で生じていた熱応力が
大幅に緩和されることがわかつている。この張り
出し量が真円半径の3〜4%程度で応力はほぼ半
減する。
As a countermeasure against fatigue rupture due to repeated stress,
If the strap ring is shaped in advance so that it extends slightly outward from the perfect circle in the middle of the connection with the vane, this part will be more likely to bend due to thermal expansion, reducing the thermal stress that was occurring near the connection with the vane. is known to be significantly alleviated. When this amount of overhang is approximately 3 to 4% of the radius of the perfect circle, the stress is approximately halved.

上記対策を行なつて外側および内側ストラツプ
リングを双方とも非円形にすることが、本願発明
と同一出願人によつて既に出願、公開されている
(実開昭54−56564号)。この考案による陽極構体
を第1図a,bに示す。図中、1はアノード円筒
部、2はベイン、2aは取付溝、3は内側ストラ
ツプリング、4は外側ストラツプリングである。
またφd1は内側ストラツプリング径、φd2は外側
ストラツプリング径、φd3は取付溝の外径であ
る。電子レンジ用のマグネトロンの場合、φd1
2は例えば7〜8mm程度、ストラツプリングの半
径方向の厚さtは0.3〜0.7mm程度、φd2/2は8.5
〜9.2mm程度、内側ストラツプリングと外側スト
ラツプリングとの間隙bは0.5〜0.9mmである。取
付溝とストラツプリングとの間隔も通常0.4〜0.6
mm程度にとる。公知の如くアノード円筒とベイン
とで共振回路が形成され、前記各部寸法は共振回
路の静電容量に影響するので、発振周波数が定め
られると当然ある範囲内に限定されることにな
る。外ストラツプリング4を取付溝2aに嵌めこ
んで、ろう接または溶接する際、管軸方向の位置
決めをするために溝2aには図bに示すような段
部Aが寸法Sだけ突出させて設けてある。この従
来例では丁度XO線断面の所で外ストラツプリン
グは真円より外側に張り出しており、張り出し量
を0.3mm又はそれ以上にもすると、ろう接作業な
どの際に、溶けたろうで本来接触してはならない
方のベインに接触して不良品となり易い。
A method of making both the outer and inner strap rings non-circular by taking the above measures has already been filed and published by the same applicant as the present invention (Utility Model Application No. 56564/1983). The anode structure according to this invention is shown in Figs. 1a and 1b. In the figure, 1 is an anode cylindrical part, 2 is a vane, 2a is a mounting groove, 3 is an inner strap ring, and 4 is an outer strap ring.
Further, φd 1 is the inner strap ring diameter, φd 2 is the outer strap ring diameter, and φd 3 is the outer diameter of the mounting groove. In the case of a magnetron for microwave oven, φd 1 /
2 is, for example, about 7 to 8 mm, the radial thickness t of the strap ring is about 0.3 to 0.7 mm, and φd 2 /2 is 8.5
~9.2 mm, and the gap b between the inner strap ring and the outer strap ring is 0.5~0.9 mm. The distance between the mounting groove and the strap spring is usually 0.4 to 0.6
Take about mm. As is well known, a resonant circuit is formed by the anode cylinder and the vane, and the dimensions of each part affect the capacitance of the resonant circuit, so when the oscillation frequency is determined, it is naturally limited within a certain range. When fitting the outer strap ring 4 into the mounting groove 2a and brazing or welding it, the groove 2a is provided with a step A that protrudes by a dimension S as shown in Figure b in order to position it in the tube axis direction. There is. In this conventional example, the outer strap ring protrudes outward from the perfect circle exactly at the XO line cross section, and if the protrusion amount is increased to 0.3 mm or more, melted solder may cause contact during soldering work. It is easy to contact the wrong vane, resulting in a defective product.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、繰返し熱応力を受けてもスト
ラツプリング破断による事故が生じ難く、かつ製
造工程でも従来例のような問題が生じないように
したマグネトロン陽極構体を提供することにあ
る。
SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetron anode structure that is less prone to accidents due to strapping breakage even when subjected to repeated thermal stress, and that does not cause the problems of conventional examples during the manufacturing process.

〔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、
外側ストラツプリングは真円形のままとし、内側
ストラツプリングのみ、ベインとの接続部の中間
で真円形から外側へ0.15〜0.40mmなめらかに張り
出した形状とした。外側ストラツプリングは内側
ストラツプリングに比し、動作時の温度が低く、
かつ大径なため、動作時に作用する熱応力が小さ
く、内外リングが共に真円形の場合について計算
してみると、既述の程度の寸法では、外側ストラ
ツプリングは内側ストラツプリングの約2倍の強
度となる。本発明に係る内側ストラツプリングの
張り出し量は、前記程度の管で、内側ストラツプ
リングの熱サイクルに対する強度が真円形のまま
の外側ストラツプリングの強度と等価となるよう
に計算で求めたものである。第1図に示した従来
例の如くすれば内側、外側ストラツプリング両方
の寿命がのびるが、内側ストラツプリングが破断
してしまつた後は、外側ストラツプリングのみ健
在でも、もはや正常な動作は不能で、役に立たな
い。言いかえれば、内側ストラツプリングの強度
で、寿命がきまる。なお内側ストラツプリングの
張り出し部は、ろう接作業や動作時に外側ストラ
ツプリングに多少接近はしても、位置決め用段部
などは存在しないから接触事故にはいたらない。
In order to achieve the above object, in the present invention,
The outer strap ring remained perfectly circular, and only the inner strap ring had a shape that smoothly protruded 0.15 to 0.40 mm outward from the perfect circle at the middle of the connection with the vane. The outer strap ring operates at a lower temperature than the inner strap ring.
Moreover, because of its large diameter, the thermal stress that acts on it during operation is small, and when calculating the case where both the inner and outer rings are perfectly circular, with the dimensions described above, the outer strap ring is about twice as large as the inner strap ring. Becomes strength. The amount of overhang of the inner strap ring according to the present invention is calculated so that the strength of the inner strap ring against thermal cycles is equivalent to the strength of the outer strap ring that remains perfectly circular in a pipe of the above-mentioned size. . If the conventional example shown in Figure 1 is used, the life of both the inner and outer strap rings will be extended, but after the inner strap ring breaks, normal operation will no longer be possible even if only the outer strap ring is intact. , useless. In other words, the strength of the inner strap spring determines its lifespan. Note that even if the protruding portion of the inner strap ring approaches the outer strap ring somewhat during soldering work or operation, there is no positioning step or the like, so contact accidents will not occur.

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

第2図aは本発明一実施例の平面図、図bは図
a中のX−O−X′線断面図である。本発明に係
る外側ストラツプリング4aは真円形で、内側ス
トラツプリング3aはベインとの接続部の中間で
図示の如く(例えばX′−O線方向で)真円より
外側へ0.3mm程度張りだしている。
FIG. 2a is a plan view of one embodiment of the present invention, and FIG. 2b is a sectional view taken along the line X--O--X' in FIG. The outer strap ring 4a according to the present invention has a perfect circular shape, and the inner strap ring 3a extends about 0.3 mm outward from the perfect circle as shown in the figure (for example, in the X'-O line direction) at the middle of the connection part with the vane. There is.

重量軽減、原価低減のためアノードの材料とし
て銅の代りにアルミニウムを用いることにする
と、ろう接強度の関係でストラツプリングの材料
もアルミニウムが望ましいものとなるが、アルミ
ニウムのような耐疲労性でやや劣る材料の場合、
ストラツプリング形状を非円形とすることは非常
に有効である。アルミニウムを材料とする場合、
ベインをアノード円筒内面にろう接することを避
けて円筒部とベインをさく出法により一体成形す
ると、ストラツプリング取付溝の加工は施盤作業
となり、どのベインの溝断面形状も同一になる。
その場合、外ストラツプリング位置決め用段部A
はどのベインの溝部にも設けられることになり、
本発明が極めて有効となる。(もし銅を材料とす
る場合は、ベインを円筒にろう接し、かつベイン
を一つおきに異なる形状に切削または打抜いたも
のを用いるという厄介な仕事を嫌わなければ、ス
トラツプリングを内、外側とも非円形にできる。)
なおアルミニウム製ストラツプリングは、アルミ
ニウム板表面をアルミニウムろう(Al−Si合金)
で被覆したいわゆるブレージングシートからプレ
ス加工して作ればよい。
If aluminum is used instead of copper as the material for the anode in order to reduce weight and cost, aluminum is also desirable as the material for the strap ring due to its brazing strength, but it is not as fatigue resistant as aluminum. For inferior materials,
It is very effective to make the strap ring shape non-circular. When using aluminum as material,
If the cylindrical part and the vane are integrally molded by the extrusion method, avoiding soldering the vane to the inner surface of the anode cylinder, the strap-ring mounting groove is formed by lathe work, and the cross-sectional shape of the groove of every vane becomes the same.
In that case, the outer strap spring positioning step A
will be provided in the groove of every vane,
The present invention is extremely effective. (If copper is the material, you can cut the inner and outer strap rings if you are willing to go through the trouble of soldering the vanes to the cylinder and having every other vane cut or stamped to a different shape.) Both can be made non-circular.)
For aluminum strap rings, the surface of the aluminum plate is coated with aluminum solder (Al-Si alloy).
It can be made by pressing from a so-called brazing sheet coated with.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明によれば、ストラツ
プリングとベインの接続作業が接触不良などを生
じないで高歩留で行なわれ、しかもストラツプリ
ングが冷熱サイクルにより破断するまでの寿命の
長い信頼性の高いマグネトロンが得られ、特に陽
極構体の材料をアルミニウム化する場合に好適で
ある。
As explained above, according to the present invention, the connection work between the strap ring and the vane can be carried out with high yield without causing poor contact, and moreover, the strap ring can be reliable and have a long life before it breaks due to cooling/heating cycles. A high magnetron can be obtained, and it is particularly suitable when the material of the anode structure is aluminum.

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

第1図aは内、外側ストラツプリングとも非円
形とした従来のマグネトロンの平面図、図bは図
a中に示すX−O−X′線断面図、第2図aは本
発明一実施例の平面図、図bは図a中に示すX−
O−X′線断面図である。 1……アノード円筒部、2……ベイン、2a…
…取付溝、3a……内側ストラツプリング、4a
……外側ストラツプリング。
Figure 1a is a plan view of a conventional magnetron in which both the inner and outer strap rings are non-circular, Figure b is a sectional view taken along the line X-O-X' shown in Figure a, and Figure 2a is an embodiment of the present invention. Figure b is a plan view of X- shown in figure a.
It is a sectional view taken along the line O-X'. 1... Anode cylindrical part, 2... Vane, 2a...
...Mounting groove, 3a...Inner strap ring, 4a
...outer strap spring.

Claims (1)

【特許請求の範囲】[Claims] 1 内側に半径方向に突設した偶数枚のベインを
有するアルミニウム材からなるアノードと、ベイ
ンを一つおきに短絡接続するそれぞれアルミニウ
ム材からなる外側および内側ストラツプリングを
備えたマグネトロン陽極構体において、前記外側
ストラツプリングは真円形とし、前記内側ストラ
ツプリングは、前記ベインとの接続部の中間部
で、真円形から外側へ最大0.15〜0.44mmなめらか
に張り出した形状としたことを特徴とするマグネ
トロン陽極構体。
1. A magnetron anode structure comprising an anode made of an aluminum material having an even number of vanes protruding in the radial direction on the inside, and outer and inner strap rings made of an aluminum material each short-circuiting every other vane. A magnetron anode structure characterized in that the outer strap ring has a perfect circular shape, and the inner strap ring has a shape that smoothly projects outward from the perfect circle by a maximum of 0.15 to 0.44 mm at the middle part of the connection part with the vane. .
JP20363782A 1982-11-22 1982-11-22 Magnetron anode structure Granted JPS5994333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20363782A JPS5994333A (en) 1982-11-22 1982-11-22 Magnetron anode structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20363782A JPS5994333A (en) 1982-11-22 1982-11-22 Magnetron anode structure

Publications (2)

Publication Number Publication Date
JPS5994333A JPS5994333A (en) 1984-05-31
JPH053098B2 true JPH053098B2 (en) 1993-01-14

Family

ID=16477340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20363782A Granted JPS5994333A (en) 1982-11-22 1982-11-22 Magnetron anode structure

Country Status (1)

Country Link
JP (1) JPS5994333A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2393570B (en) * 2002-05-31 2005-12-14 Marconi Applied Techn Ltd Magnetrons

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6013167Y2 (en) * 1977-09-07 1985-04-26 株式会社日立製作所 magnetron
JPS568134U (en) * 1979-06-28 1981-01-24

Also Published As

Publication number Publication date
JPS5994333A (en) 1984-05-31

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