JPH0141148Y2 - - Google Patents
Info
- Publication number
- JPH0141148Y2 JPH0141148Y2 JP10552083U JP10552083U JPH0141148Y2 JP H0141148 Y2 JPH0141148 Y2 JP H0141148Y2 JP 10552083 U JP10552083 U JP 10552083U JP 10552083 U JP10552083 U JP 10552083U JP H0141148 Y2 JPH0141148 Y2 JP H0141148Y2
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- diameter
- groove
- sleeve
- cathode sleeve
- 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
Links
- 239000000126 substance Substances 0.000 claims description 2
- 239000012857 radioactive material Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000011195 cermet Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000941 radioactive substance Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Microwave Tubes (AREA)
Description
【考案の詳細な説明】
本考案はマグネトロン用陰極に関し、特に陰極
表面の電子放射部分に溝部を形成してその溝部に
電子放射性物質を充填するいわゆるグルーブタイ
プ陰極の構造に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetron cathode, and more particularly to a so-called groove type cathode structure in which a groove is formed in the electron emitting portion of the cathode surface and the groove is filled with an electron emissive material.
マグネトロン用陰極は陰極から発射した電子が
磁界の作用で回転運動をするため陰極から発射し
た電子が全て陽極には至らず陰極に戻つて陰極を
逆衝撃する電子が、ある割合で存在する。その為
オキサイドのような粉末状の電子放射性物質を塗
り固めた陰極では激しい電子の逆衝撃を受けて電
子放射性物質が損傷を受け易い。またマグネトロ
ンはパルス動作させることが多く、その場合単位
面積当りの電流密度が非常に大きい反面、粉末状
の電子放射性物質を塗り固めた陰極では電子放射
性物質層間のシリーズ抵抗が大きくなるため、高
電流密度を必要とするマグネトロン用陰極におい
ては、電子放射性物質のみを陰極表面に塗り固め
たものでは好ましくない。これらの理由に基づき
電子放射性物質の中に金属片を混在させたものを
陰極スリーブの周囲に固着したいわゆるサーメツ
トタイプや陰極スリーブの周囲にメツシユを接着
してメツシユの網の目に電子放射性物質を充填し
たメツシユタイプや陰極スリーブの周囲に溝を形
成してその溝内に電子放射性物質を充填するグル
ーブタイプのものが考えられている。 In a magnetron cathode, the electrons emitted from the cathode undergo rotational motion due to the action of the magnetic field, so not all of the electrons emitted from the cathode reach the anode, but a certain percentage of the electrons return to the cathode and impact the cathode in reverse. For this reason, in a cathode coated with a powdered electron emissive material such as oxide, the electron emissive material is likely to be damaged by severe reverse bombardment of electrons. In addition, magnetrons are often operated in pulses, and in that case, the current density per unit area is extremely high. However, with a cathode coated with powdered electron radioactive material, the series resistance between the electron radioactive material layers becomes large, resulting in a high current density. In a magnetron cathode that requires density, it is not preferable to have only an electron-emitting substance coated and solidified on the cathode surface. Based on these reasons, we use a so-called cermet type in which metal pieces are mixed with an electron radioactive material and adhere it around the cathode sleeve, or we use a mesh that is glued around the cathode sleeve to release the electron radioactive material into the mesh of the mesh. A mesh type filled with carbon dioxide and a groove type in which a groove is formed around the cathode sleeve and an electron radioactive material is filled in the groove are considered.
グルーブタイプの陰極は、メツシユタイプのも
のが陰極スリーブとメツシユの接着強度が十分で
ない為その特性を向上させるため考えられたもの
で、例えば第１図に断面図を示すような構造にな
つている。即ち第１図で１は陰極スリーブ、２は
ヒータ、３は陰極スリーブ１に形成した溝、４は
溝３内に充填した電子放射性物質、５はエンドハ
ツトで陰極スリーブ１と一体に形成されている。
このタイプの陰極ではメツシユタイプのように陰
極スリーブの外周に接着したメツシユの剥離とい
うような使用面上でのトラブルは発生せず特性面
で良好なものが得られるが、陰極スリーブに溝３
を形成する機械加工が非常に精密な加工を必要と
し（陰極スリーブ１の肉厚自体が約0.5〜１mmと
薄く、溝の幅約0.2mm深さ0.1mmと全体的に非常に
小さいものである。）加工が困難であると共に、
製作できても工数を多く必要とし高価なものにな
る欠点があつた。 Groove type cathodes were developed to improve the characteristics of mesh type cathodes because the adhesive strength between the cathode sleeve and the mesh was insufficient, and they have a structure, for example, as shown in the cross-sectional view of FIG. 1. That is, in FIG. 1, 1 is a cathode sleeve, 2 is a heater, 3 is a groove formed in the cathode sleeve 1, 4 is an electron radioactive material filled in the groove 3, and 5 is an end hat, which is formed integrally with the cathode sleeve 1. .
This type of cathode does not cause problems in use, such as peeling of the mesh adhered to the outer periphery of the cathode sleeve, unlike the mesh type, and provides good characteristics.
The machining process to form the groove requires extremely precise machining (the wall thickness of the cathode sleeve 1 itself is thin at approximately 0.5 to 1 mm, and the groove width is approximately 0.2 mm and depth is 0.1 mm, which is extremely small overall). .) It is difficult to process, and
Even if it could be manufactured, it required a lot of man-hours and was expensive.
本考案はこのような状況に鑑みなされたもの
で、その目的は容易に製作でき安価なグルーブタ
イプ陰極の陰極構体を提供することにある。具体
的には陰極スリーブと同材質の薄板で形成した大
径と小径のラミネート板を陰極スリーブの外周に
接着するかあるいは陰極スリーブをも兼ねた大径
と小径のラミネート板を交互に積み重ねて接着
し、溝部を形成したことにある。以下図面により
詳細に説明する。 The present invention was devised in view of this situation, and its purpose is to provide a cathode structure of a groove type cathode that is easy to manufacture and inexpensive. Specifically, large-diameter and small-diameter laminate plates made of thin plates of the same material as the cathode sleeve are glued to the outer periphery of the cathode sleeve, or large-diameter and small-diameter laminate plates that also serve as cathode sleeves are stacked and glued alternately. However, the groove is formed. This will be explained in detail below with reference to the drawings.
第２図は本考案の一実施例を示す図でａが断面
図ｂが平面図である。第２図で１〜５は第１図と
同一部品を示すがエンドハツト５が陰極スリーブ
１とは一体でなく板でリング状に形成したものを
陰極スリーブ１の外形に接着したものである。６
は内径が陰極スリーブ１の外形と同一で、外径が
大きいラミネート板、７は内径が陰極スリーブ１
の外径と同一で外径がラミネート板６の外径より
小さいラミネート板、８はエンドハツト５とラミ
ネート板６，７との相互位置を確定するためのリ
ングで内径は陰極スリーブ１の外径と同じで外径
は小径ラミネート板７と同じにしてあり、これは
小径ラミネート板７を複数個重ねて使用しても良
い。これらラミネート板６，７やエンドハツト５
類はニツケル板など加工し易い材料のためプレス
加工などで容易に形成でき、これをエンドハツト
５リング８の後に大径ラミネート６および小径ラ
ミネート板７を交互に必要な陰極面積となる範囲
だけ重ね、更に大径ラミネート板６、リング８、
エンドハツト５を重ねて例えばニツケル粉のよう
なエミツシヨンに悪影響しないロウ材でロウ付、
熱圧着又は冷間でスリーブをスパーンして密着さ
せる。このようにして各ラミネート板を隙間なく
積層にして接着すれば大径ラミネート板６で囲ま
れた小径ラミネート板７の部分に溝３が形成さ
れ、この溝３部に電子放射性物質を充填すれば従
来と同様のグルーブタイプの陰極が得られる。 FIG. 2 shows an embodiment of the present invention, in which a is a sectional view and b is a plan view. In FIG. 2, reference numerals 1 to 5 indicate the same parts as in FIG. 1, but the end hat 5 is not integral with the cathode sleeve 1, but is a plate formed in a ring shape and adhered to the outer shape of the cathode sleeve 1. 6
7 is a laminate plate whose inner diameter is the same as the outer diameter of cathode sleeve 1 and has a larger outer diameter, and 7 is a laminate plate whose inner diameter is the same as that of cathode sleeve 1.
8 is a ring for determining the mutual position of the end hat 5 and the laminate plates 6 and 7, and the inner diameter is the same as the outer diameter of the cathode sleeve 1. The outer diameter is the same as that of the small-diameter laminate plate 7, and a plurality of small-diameter laminate plates 7 may be stacked and used. These laminate plates 6, 7 and end hats 5
These can be easily formed by press working etc. because they are made of easy-to-process materials such as nickel plates, and after the end hat 5 ring 8, a large diameter laminate 6 and a small diameter laminate plate 7 are alternately overlapped to the extent that the required cathode area is obtained. Furthermore, a large diameter laminate plate 6, a ring 8,
Stack the end hats 5 and solder them with a waxing material such as nickel powder that does not adversely affect the emitter.
The sleeve is spun to fit tightly by hot compression bonding or cold. If the laminate plates are stacked and bonded without any gaps in this way, a groove 3 will be formed in the portion of the small-diameter laminate plate 7 surrounded by the large-diameter laminate plate 6, and if this groove 3 is filled with an electron radioactive material, A groove type cathode similar to the conventional one can be obtained.
第３図は本考案の他の実施例を示す陰極基体部
の断面図で、この例では陰極スリーブの外周面に
ラミネート板を接着させるのでなく、ラミネート
板で陰極スリーブをも兼ねたものである。即ちニ
ツケル板のような薄板で大径ラミネート板１１お
よび小径ラミネート板１２ならびにエンドハツト
５を内径が従来の陰極スリーブの内径と同じ寸法
で型加工などにより形成しておき、陰極スリーブ
基体９にエンドハツト５、リング１０、小径ラミ
ネート１２および大径ラミネート１１を複数組、
リング１０、エンドハツト５、端部リング１３を
それぞれ内径が一致するように積層してロウ付な
どにより接着する。この接着方法としては、例え
ば内径に合致した治具棒にこれらを順次挿入して
両端部から挾み付けロウ付あるいは溶接等により
容易に得られる。このリング１０および端部リン
グ１３は大径ラミネート板１１あるいは小径ラミ
ネート板１２を複数枚使用しても良いし、陰極ス
リーブ基体９のパイプを切断してリングとしても
良い。 Figure 3 is a sectional view of the cathode base part showing another embodiment of the present invention.In this example, a laminate plate is not glued to the outer peripheral surface of the cathode sleeve, but a laminate plate that also serves as the cathode sleeve. . That is, a large-diameter laminate plate 11, a small-diameter laminate plate 12, and an end hat 5 are made of thin plates such as nickel plates, and the inner diameter is the same as that of a conventional cathode sleeve. , a ring 10, a plurality of sets of small diameter laminates 12 and large diameter laminates 11,
The ring 10, end hat 5, and end ring 13 are stacked so that their inner diameters match and are bonded together by brazing or the like. This bonding method can be easily achieved by, for example, sequentially inserting these into a jig rod that matches the inner diameter and clamping them from both ends, brazing or welding. For the ring 10 and the end ring 13, a plurality of large-diameter laminate plates 11 or small-diameter laminate plates 12 may be used, or the pipe of the cathode sleeve base 9 may be cut to form a ring.
以上説明したように、本考案によれば陰極表面
部に溝部を有するグルーブタイプの陰極を、型加
工で容易に形成できる大径と小径のラミネート板
を交互に重ね合わせて接着するだけで得られるた
め、安価に製造でき、しかも溝の幅および深さは
ラミネーシヨンの板厚および外径で自由に調整で
きるため細かい溝部でも容易に形成でき、信頼性
の良いマグネトロンの特性向上に寄与するところ
大なるものがある。 As explained above, according to the present invention, a groove-type cathode having grooves on the surface of the cathode can be obtained by simply stacking and gluing laminate plates of large diameter and small diameter, which can be easily formed by mold processing, alternately. Therefore, it can be manufactured at low cost, and since the width and depth of the groove can be freely adjusted by adjusting the thickness and outer diameter of the lamination, even small grooves can be easily formed, which greatly contributes to improving the characteristics of reliable magnetrons. There is something.
第１図は従来のグルーブタイプの陰極い断面
図、第２図は本考案の一実施例を示すグルーブタ
イプ陰極でａが断面図、ｂが平面図、第３図は本
考案の他の実施例を示す陰極基体部の断面図であ
る。
１…陰極スリーブ、２…ヒータ、３…溝、４…
電子放射性物質、５…エンドハツト、６，１１…
大径ラミネート板、７，１２…小径ラミネート
板。
Figure 1 is a sectional view of a conventional groove type cathode, Figure 2 is a groove type cathode showing one embodiment of the present invention, with a being a sectional view and b being a plan view, and Figure 3 being another embodiment of the present invention. FIG. 3 is a cross-sectional view of a cathode base portion showing an example. 1... Cathode sleeve, 2... Heater, 3... Groove, 4...
Electron radioactive substance, 5... Endhat, 6, 11...
Large diameter laminate board, 7, 12...Small diameter laminate board.
Claims (1)
スリーブの中空部に挿入したヒータと、該陰極ス
リーブの外周で電子放射部分に形成した溝部と、
該溝部に充填した電子放射性物質と、前記電子放
射部分の両端部に設けたエンドハツトとからなる
マグネトロン用陰極において、大径を有するラミ
ネート板および小径を有するラミネート板とを交
互に積み重ねて接着し前記溝部を形成したことを
特徴とするマグネトロン用陰極。 A cathode sleeve formed into a hollow cylindrical shape, a heater inserted into the hollow part of the cathode sleeve, and a groove formed in an electron emitting part on the outer periphery of the cathode sleeve.
In a magnetron cathode consisting of an electron emitting substance filled in the groove and end hats provided at both ends of the electron emitting portion, laminate plates having a large diameter and laminate plates having a small diameter are alternately stacked and bonded. A magnetron cathode characterized by having a groove formed therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10552083U JPS6013657U (en) | 1983-07-06 | 1983-07-06 | Cathode for magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10552083U JPS6013657U (en) | 1983-07-06 | 1983-07-06 | Cathode for magnetron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6013657U JPS6013657U (en) | 1985-01-30 |
| JPH0141148Y2 true JPH0141148Y2 (en) | 1989-12-06 |
Family
ID=30247300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10552083U Granted JPS6013657U (en) | 1983-07-06 | 1983-07-06 | Cathode for magnetron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6013657U (en) |
-
1983
- 1983-07-06 JP JP10552083U patent/JPS6013657U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6013657U (en) | 1985-01-30 |
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