JP3424450B2 - Method of joining blocks and method of manufacturing coil for rotating electrical machine using the same - Google Patents
Method of joining blocks and method of manufacturing coil for rotating electrical machine using the sameInfo
- Publication number
- JP3424450B2 JP3424450B2 JP20806896A JP20806896A JP3424450B2 JP 3424450 B2 JP3424450 B2 JP 3424450B2 JP 20806896 A JP20806896 A JP 20806896A JP 20806896 A JP20806896 A JP 20806896A JP 3424450 B2 JP3424450 B2 JP 3424450B2
- Authority
- JP
- Japan
- Prior art keywords
- brazing
- melting point
- brazing material
- filler metal
- brazing filler
- 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
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- Windings For Motors And Generators (AREA)
- Manufacture Of Motors, Generators (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、大電流を流す矩形
状のコイル電線端部のようなブロック状の端子を縦横に
積み重ねて一括接合するような部分に適用できるブロッ
ク体の接合方法に係わり、特にタービン発電機や水車発
電機に採用される回転電機体用の固定子コイルの端部の
接合に好適な接合方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of joining a block body that can be applied to a portion where block-shaped terminals such as a rectangular coil wire end portion through which a large current is passed are vertically and horizontally stacked and collectively joined. In particular, the present invention relates to a joining method suitable for joining ends of a stator coil for a rotating electric machine body used in a turbine generator or a turbine generator.
【0002】[0002]
【従来の技術】回転電機装置、例えば、タービン発電機
などにおいては、発電機単体の容量の増大に伴い、コイ
ル導体を冷却する構造が採用されている。この冷却方法
として、大容量の発電機はコイル導体内部から直接冷却
する構造が採用されている。この方式のコイル導体は、
該導体素線自体に冷却媒体供給用の冷却孔を設けた中空
構造になっている。この中空導体に直接冷却媒体を供給
あるいは排出するために、コイル導体の電気的通電と冷
却媒体の供給と排出とを同時に行うための給排液箱が設
けられている。この給排液箱は、作業性の関係で一般に
発電機固定子の鉄心部より突出した巻線端部に設けられ
ている。なお、この給排液箱は一般に四角形の箱型にな
っている。2. Description of the Related Art In rotary electric machines, such as turbine generators, a structure for cooling a coil conductor is adopted as the capacity of the generator alone increases. As a cooling method, a large-capacity generator employs a structure in which the coil conductor is directly cooled. This type of coil conductor
The conductor wire itself has a hollow structure in which cooling holes for supplying a cooling medium are provided. In order to directly supply or discharge the cooling medium to or from the hollow conductor, there is provided a supply / drainage box for electrically energizing the coil conductor and simultaneously supplying and discharging the cooling medium. This liquid supply / drainage box is generally provided at the end of the winding protruding from the iron core of the generator stator for reasons of workability. The supply / drainage box is generally in the shape of a rectangular box.
【0003】この給排液箱とコイル導体の接合は、2面
が開放された給排液箱の中に導体素線の一部を配置後、
蓋を閉じ、最後に給排液箱,蓋,導体素線を同時にろう
付けによって接合している。接合する導体素線の一部は
図1の導体素線5のように略立方体形状のブロックを
縦,横に積み重ねたようなものとなっている。このろう
付けは、給排液箱内部の導体素線間に、ろう付け前に予
め、ろう材を図1のように配置し、全体を加熱してろう
材を溶かすことによって接合する。さらに、給排液箱の
外部からも同種または別種のろう材を供給し、ろう材の
重力による流れ落ちにより、ろう材が不足した部分にろ
う材を供給しながらろう付けする場合もある。また、ろ
う付けの過程で蓋とコイル間に一定の荷重を付加しなが
らろう付けする。The connection between the liquid supply / drainage box and the coil conductor is performed by arranging a part of the conductor wire in the liquid supply / drainage box having two open surfaces.
The lid is closed, and finally the liquid supply / drainage box, the lid, and the conductor wire are simultaneously joined by brazing. A part of the conductor wires to be joined is like one in which substantially cubic blocks are vertically and horizontally stacked like the conductor wires 5 in FIG. In this brazing, a brazing material is arranged in advance as shown in FIG. 1 between the conductor wires inside the liquid supply / drainage box, and the whole is heated to melt the brazing material to join them. Further, brazing filler metal of the same type or different types may be supplied from the outside of the liquid supply / drainage box, and brazing may be performed while supplying the brazing filler metal to a portion where the brazing filler metal is insufficient due to gravity flow of the brazing filler metal. Also, brazing is performed while applying a constant load between the lid and the coil during the brazing process.
【0004】従来、上記ろう付けのためのろう材として
は大気中でろう付けが可能なリン(P)銅ろうが適用さ
れている。例えば、導体素線間に薄板または箔状に配置
するろう材としては、JIS規格BCuP−1のリン銅
ろうを用いている。このろう材の液相線温度は900
℃、固相線温度は705℃である。[0004] Conventionally, phosphorus (P) copper braze which can be brazed in the atmosphere has been used as the brazing material for the brazing. For example, phosphorous copper braze of JIS standard BCuP-1 is used as a brazing material arranged between conductor wires in a thin plate or foil form. The liquidus temperature of this brazing material is 900
° C, solidus temperature is 705 ° C.
【0005】[0005]
【発明が解決しようとする課題】従来の単独種類のろう
材の薄板または箔を導体素線間に配置して接合する方法
では、次のような問題が生じていた。In the conventional method of arranging and joining a thin plate or foil of a brazing material of a single type between the conductor wires, the following problems have occurred.
【0006】単独種類のろう材の薄板,箔等を予め導体
素線間の上下に配置してろう付けした場合、加熱により
ろう材の温度が固相線(液相が生じ始める温度)以上に
達したろう材は粘性が低下し、ろう材自体の重力で導体
素線の下方(給排液箱の下方)側に垂れ落ちる。このた
め、上方側に位置する導体素線間に浸透するろう材が不
足し、欠陥の発生原因になる。特に排液箱上方向(蓋
側)のろう材が不足して、上方向に欠陥が多く発生しや
すい。特に回転機の給排液箱の導体素線の接合の場合に
は、運転中の腐食も加わり、ろう付け部の剥離の原因に
なり、コイル導体の絶縁劣化を誘発し、回転機の大きな
事故要因になる。When a thin plate or foil of a single type of brazing material is previously arranged above and below the conductor wires for brazing, the temperature of the brazing material becomes higher than the solidus (the temperature at which a liquid phase begins to occur) by heating. The viscosity of the brazing filler metal that has arrived decreases and the gravity of the brazing filler metal itself causes the brazing filler metal to hang down below the conductor wire (below the supply / drainage box). For this reason, the brazing material that penetrates between the conductor wires located on the upper side becomes insufficient, causing defects. In particular, the brazing material in the upper direction (lid side) of the drainage box is insufficient, and many defects are likely to occur in the upper direction. In particular, when the conductor wires of the water supply / drainage box of the rotating machine are joined, corrosion during operation is also added, which causes the exfoliation of the brazing part, which causes insulation deterioration of the coil conductor, causing a major accident of the rotating machine. Becomes a factor.
【0007】また、導体素線の中心に冷却媒体を流すよ
うな構造のものに対しては、排液箱の上方向(蓋側)の
ろう材が下方に垂れ落ちて下方側のろう材が多くなる。
このため、このろう材がコイル導体の冷却孔に侵入して
冷却孔が細くなり、コイル導体の冷却効率低下の原因に
なる。For a structure in which the cooling medium flows in the center of the conductor wire, the brazing material in the upper direction (lid side) of the drainage box hangs down and the brazing material on the lower side Will increase.
For this reason, this brazing filler metal penetrates into the cooling holes of the coil conductor, and the cooling holes become thin, which causes a decrease in the cooling efficiency of the coil conductor.
【0008】本発明の目的は、導体素線端部のような略
直方体形状のブロックを縦横に複数個並べて一括接合す
る際に、各ブロックが十分なろう材により均一かつ強固
に接合されるような接合方法を提供することにある。An object of the present invention is to ensure that, when a plurality of substantially rectangular parallelepiped-shaped blocks such as the end portions of conductor strands are lined up vertically and horizontally and collectively bonded, the blocks are uniformly and firmly bonded by a sufficient brazing material. To provide a simple joining method.
【0009】更に、冷却媒体を流す中空部を有する導体
素線の端部を、使用時の冷却媒体の漏れがなく、かつコ
イル導体の冷却効率の低下を引き起こさずに接合する回
転電気体コイルの製造方法を提供することにある。Further, a rotating electric body coil is formed in which the end portion of a conductor wire having a hollow portion through which a cooling medium flows is joined without causing leakage of the cooling medium during use and without lowering the cooling efficiency of the coil conductor. It is to provide a manufacturing method.
【0010】[0010]
【課題を解決するための手段】上記目的を達成するた
め、本発明によれば接合する部分が略直方体形状である
ブロックを幅方向に2列以上、高さ方向に2列以上並べ
て接合する方法において、複数枚の融点の異なるろう材
からなる薄板を、少なくとも前記ブロックの高さ方向の
間隙部に配置した後、前記ブロックを加熱して、前記ろ
う材を溶融させ、前記ブロックを同時に接合することを
特徴とするブロック体の接合方法が提供される。接合す
るブロックを縦横方向に並べ、ブロックの間にろう材か
らなる薄板または箔を配置した後、ブロックを外部より
加熱して、ろう材を溶融させる。その際、融点の異なる
複数種類のろう材の薄板を重ねたものを用いると、液相
線の低いろう材の大部分は溶融して各導体素線間に浸透
し、結合力を発生させる。一方、液相線の高いろう材の
大部分は配置したろう材のままで残ることにより、液相
線の低いろう材が、ブロックの下方に流れ落ちることを
防止する。これらの複合作用により、ブロックが欠陥な
く接合できる。これにより、ブロックが導電線である場
合は、接続部の電気抵抗が小さくなり、エネルギーロス
を低減できる。また、振動,回転等の機械的な力を受け
る部分に使用される接続部であれば、長期間にわたり接
合部に割れ,剥離などの生じない信頼性の高い接合部が
提供できる。本発明でろう材と言っているのは、市販さ
れている、いわゆるろう材以外でも、接合のための加熱
時に、自身の少なくとも一部が溶融し、被接合材を金属
接合させることのできるものすべてを呼称している。To achieve the above object, according to an aspect of the portion to be bonded according to the present onset Ming two or more rows of blocks is a substantially rectangular parallelepiped shape in the width direction and joined side by side two or more rows in the height direction In the method, a plurality of thin plates made of brazing filler metal having different melting points are arranged in at least a gap in the height direction of the block, the block is heated to melt the brazing filler metal, and the blocks are simultaneously joined. A method for joining block bodies is provided. The blocks to be joined are arranged in the vertical and horizontal directions, a thin plate or foil made of a brazing material is arranged between the blocks, and then the blocks are heated from the outside to melt the brazing material. At this time, when a plurality of brazing filler metals having different melting points are stacked, most of the brazing filler metal having a low liquidus melts and permeates between the conductor wires to generate a bonding force. On the other hand, most of the brazing material having a high liquidus is left as it is, so that the brazing material having a low liquidus is prevented from flowing down to the bottom of the block. Due to their combined action, the blocks can be joined without defects. As a result, when the block is a conductive wire, the electrical resistance of the connection portion is reduced, and energy loss can be reduced. Further, as long as it is a connection portion used for a portion that receives a mechanical force such as vibration or rotation, it is possible to provide a highly reliable joint portion in which the joint portion is not cracked or separated for a long period of time. In the present invention, the term "brazing material" refers to a material other than a so-called brazing material that is commercially available, and at least part of itself melts at the time of heating for bonding, and can bond the materials to be bonded to each other. All are called.
【0011】本発明では、最も融点の高いろう材を、該
ろう材より融点の低いろう材で上下方向より挟んだ構成
となっていることが好ましい。融点の異なるろう材の薄
板を複数枚重ねて圧着(クラッド)する場合、最も融点
の高いろう材が、それより融点の低いろう材で上限方向
から挟まれていることにより、融点の高いろう材が融点
の低いろう材が流れ落ちるのを防止する堰の役割をす
る。融点の低いろう材は、融点の高いろう材を境にし
て、その上下に位置するブロックに広がり、確実にブロ
ック間を接合することができる。In the present invention, it is preferable that the brazing material having the highest melting point is sandwiched between the brazing materials having a lower melting point than the brazing material in the vertical direction. When multiple thin plates of brazing filler metal with different melting points are stacked and pressure bonded (cladding), the brazing filler metal with the highest melting point is sandwiched from the upper limit direction by the brazing filler metal with the lower melting point Acts as a weir that prevents the brazing material with a low melting point from flowing down. The brazing material having a low melting point spreads to the blocks located above and below the brazing material having a high melting point as a boundary, and the blocks can be reliably joined.
【0012】更に、上記において、最も融点の高いろう
材と、該ろう材より融点の低いろう材の融点の差が30
℃以上あることがより好ましい。Further, in the above, the difference in melting point between the brazing material having the highest melting point and the brazing material having a lower melting point than the brazing material is 30.
It is more preferable that the temperature is not lower than ° C.
【0013】融点の差があまり小さいと、低い融点のろ
う材を溶融させる時に、高い融点のろう材の大部分も溶
けてしまい、堰としての役割が不十分となってしまうか
らである。融点の差が30℃以上あれば、十分強固な接
合が得られる。ただし、この30℃の値自体は臨界性を
有するものではなく、好ましい範囲の目安を示すに過ぎ
ない。If the difference in melting point is too small, most of the brazing material having a high melting point is also melted when melting the brazing material having a low melting point, and the role of the weir becomes insufficient. If the difference in melting point is 30 ° C. or more, sufficiently strong bonding can be obtained. However, the value of 30 ° C. itself does not have a criticality, and is merely an indication of a preferable range.
【0014】本発明においては、接合のための加熱温度
を最も融点の低いろう材の融点の次に融点の低いろう材
の、液相線温度と固相線温度との間とすることが望まし
い。In the present invention, it is desirable that the heating temperature for joining is between the liquidus temperature and the solidus temperature of the brazing material having the second lowest melting point after the melting point of the brazing material having the lowest melting point. .
【0015】本発明においては、接合するブロック体を
加熱し、ろう材を溶かす場合の加熱温度が重要である。
当然のことであるが、加熱温度が最も融点の低いろう材
の固相線(ろう材の一部が溶け始める温度)よりも低い
場合は接合することができないが、一方、最も融点の高
いろう材の液相線(ろう材の全てが溶けてしまう温度)以
上に加熱してしまうと、上記したような堰的効果が得ら
れず、本発明の効果が十分得られない。従って、本発明
の効果を十分得るためには、加熱温度を上記のようにす
ることが望ましい。In the present invention, the heating temperature for heating the block body to be joined and melting the brazing filler metal is important.
As a matter of course, if the heating temperature is lower than the solidus line of the brazing filler metal with the lowest melting point (the temperature at which a part of the brazing filler metal begins to melt), joining will not be possible, but on the other hand, the brazing filler metal with the highest melting point If heated above the liquidus of the material (the temperature at which all of the brazing material melts), the above weir-like effect cannot be obtained, and the effect of the present invention cannot be sufficiently obtained. Therefore, in order to obtain the effects of the present invention sufficiently, it is desirable to set the heating temperature as described above.
【0016】また、ろう材の最も融点の高いろう材の液
相線温度が850℃以上,1000℃以下、最も融点の
低いろう材の液相線温度が640℃以上,900℃以下
であることが好ましい。The liquidus temperature of the brazing material having the highest melting point is 850 ° C. or higher and 1000 ° C. or lower, and the liquidus temperature of the brazing material having the lowest melting point is 640 ° C. or higher and 900 ° C. or lower. Is preferred.
【0017】ろう材の接合強度は、ほぼろう材の融点に
比例している。したがって最も融点の低いろう材の液相
線温度でも640℃以上あることが望ましい。しかし接
合のための加熱温度が高すぎると、接合するブロック材
料の熱変形,熱歪み等が問題となってくるので、液相線
温度は900℃以下であることが望ましい。同様の関係
で、最も融点の高いろう材の融点は850℃以上,10
00℃以下であることが好ましい。The joint strength of the brazing material is almost proportional to the melting point of the brazing material. Therefore, it is desirable that the liquidus temperature of the brazing material having the lowest melting point is 640 ° C. or higher. However, if the heating temperature for joining is too high, thermal deformation, thermal strain, etc. of the joining block material become a problem, so the liquidus temperature is preferably 900 ° C. or lower. In the same relationship, the melting point of the brazing material with the highest melting point is 850 ° C or higher, 10
It is preferably 00 ° C or lower.
【0018】本発明において、ブロックを高さ方向に3
列以上並べて接合する場合は、上方のブロックを接合す
るろう材のうちの最も融点の低いろう材の液相線温度
が、それより下のブロックを接合するろう材のうちの最
も融点の低いろう材の液相線温度以下であることが好ま
しい。In the present invention, the blocks are arranged in the height direction 3
When joining in rows or more, the liquidus temperature of the brazing filler metal with the lowest melting point among the brazing filler metals joining the upper block has the lowest melting point among the brazing filler metals joining the blocks below it. It is preferably below the liquidus temperature of the material.
【0019】ブロックを3段以上積み重ねて接合する場
合、より上段にあるろう材が溶けたものが、一番下にあ
るブロックまで流れる。一方、下段にあるろう材は、そ
れほど流動しなくとも接合に問題は生じない。従って、
下段にあるろう材の液相線温度は、それより上段にある
ろう材の液相線温度より高い方が好ましい。ただし、こ
の場合は、液相線の温度の差はそれほど大きくなくても
実用上問題ない。When the blocks are stacked and joined in three or more steps, the molten brazing material in the upper step flows to the block in the bottom. On the other hand, the brazing material in the lower stage does not cause a problem in joining even if it does not flow so much. Therefore,
Liquidus temperature of the brazing material in the lower part, preferably higher have how the liquidus temperature of the brazing material in it than the upper. However, in this case, there is no practical problem even if the difference in liquidus temperature is not so large.
【0020】上記したようなブロックの接合方法は、冷
却媒体を流すための中空部を備えた導体素線を複数個、
縦横方向に並べて、ろう材を用いて一括接合する方法、
複数の中空コイル導体素線が固定子鉄心の溝内に配置さ
れ、該導体素線がその導体素線端部に加熱溶着により接
合された給排液箱を備え、該導体素線を直接冷却する構
造の回転電機体コイルの製造方法に適用可能である。In the block joining method as described above, a plurality of conductor wires having hollow portions for flowing the cooling medium are provided.
A method of arranging in the horizontal and vertical directions and collectively joining using brazing material,
A plurality of hollow coil conductor wires are arranged in the groove of the stator core, and the conductor wires are provided with a liquid supply / drainage box joined to the ends of the conductor wires by heat welding, and the conductor wires are directly cooled. It is applicable to the manufacturing method of the rotating electrical machine coil having the above structure.
【0021】ろう材の組成としては、りん(P)と銅
(Cu)を主成分とし、必要に応じて第3の元素が添加
されたものを用いることができる。市販のろう材成分と
しては、液相線の高い方のろう材の組成は、Pが0.5
〜5wt%で残部がCuのもの、一部銀(Ag)などの
他の元素が添加されたものなどを用いることができる。
液相線の低い方のろう材の組成としては市販のろう材成
分では、Pが4〜6wt%で残部がCuのもの、更に一
部銀(Ag)などの他の元素が添加されたものなどが適
用できる。それほど強度が必要ない部分の接合には、は
んだのような鉛ー錫系の軟ろう(融点300℃程度)を
用いることもできる。As the composition of the brazing material, a composition containing phosphorus (P) and copper (Cu) as main components, and optionally a third element added thereto can be used. As a commercially available brazing filler metal component, the composition of the brazing filler metal with the higher liquidus is P 0.5.
It is possible to use, for example, a Cu content of ˜5 wt% and a balance of Cu, and a material to which another element such as silver (Ag) is added.
As for the composition of the brazing filler metal having a lower liquidus, a commercially available brazing filler metal component having a P content of 4 to 6 wt% and a balance of Cu, and a part of which is added with other elements such as silver (Ag). Can be applied. A lead-tin based soft solder (melting point: about 300 ° C.) such as solder may be used for joining the portions that do not require so much strength.
【0022】重要な点は使用するろう材の融点と、接合
時の加熱温度との関係である。また、本発明では、液相
線の高いろう材によって、給排液箱に配置された複数の
導体素線を上下方向の各段ごとに独立してろう付けでき
る。このため、ろう付けの層の品質管理が容易になる利
点もある。An important point is the relationship between the melting point of the brazing material used and the heating temperature at the time of joining. Further, in the present invention, a plurality of conductor wires arranged in the liquid supply / drainage box can be independently brazed in each step in the vertical direction by the brazing material having a high liquidus wire. Therefore, there is also an advantage that the quality control of the brazing layer is facilitated.
【0023】また、最も融点の高いろう材は接合のため
の加熱時に全く溶けないようなものであっても本発明の
効果を奏することができる。その場合、接合強度は、そ
のろう材が一部溶ける場合に比べて若干低下するが、融
点の低いろう材の流れ落ちを防止する効果は生じるから
である。その場合は、融点の低い金属と濡れ性が良く、
かつ何らかの化学的,物理的反応を起こすようなろう材
(溶けない物をろう材と呼称するのには問題があるが)
であることが望ましい。Even if the brazing material having the highest melting point does not melt at the time of heating for joining, the effect of the present invention can be obtained. In that case, the bonding strength is slightly reduced as compared with the case where the brazing material partially melts, but the effect of preventing the brazing material having a low melting point from flowing down is produced. In that case, it has good wettability with a metal having a low melting point,
And a brazing material that causes some kind of chemical or physical reaction (although it is problematic to call an insoluble material a brazing material)
Is desirable.
【0024】[0024]
(実施例1)図1は給排液箱と導体素線とのろう付け方
法を示す斜視図である。図1に示すごとく、給排液箱1
は2面が開放された箱型になっている。冷却媒体の給排
出用の金具2とコイル接続片3は、予め、給排液箱1に
溶着によって固定されている。図1では給排液箱の内部
が見えるように示しているが、給排液箱内部の冷却媒体
給排室は空洞になっており、この空洞部から各導体素線
に冷却水が供給される。(Embodiment 1) FIG. 1 is a perspective view showing a brazing method of a liquid supply / drainage box and a conductor wire. As shown in FIG. 1, the liquid supply / drainage box 1
Has a box shape with two sides open. The metal fitting 2 for supplying and discharging the cooling medium and the coil connecting piece 3 are fixed in advance to the liquid supply / drainage box 1 by welding. Although the inside of the supply / drainage box is visible in FIG. 1, the cooling medium supply / discharge chamber inside the supply / drainage box is hollow, and cooling water is supplied to each conductor wire from this hollow portion. It
【0025】ろう付けは、次のような順序で行われる。
まず、各導体素線5の上下方向の各段ごとにろう材6を
配置する。ろう材が配置された導体素線5を複数本束ね
て2面が開放された給排液箱1内に配置し、最後に蓋7
を配置する。Brazing is performed in the following order.
First, the brazing material 6 is arranged at each step in the vertical direction of each conductor element wire 5. A plurality of conductor wires 5 on which the brazing material is arranged are bundled and arranged in the liquid supply / drainage box 1 having two open sides, and finally the lid 7
To place.
【0026】以下、本発明の一つである各導体素線間の
上下方向に液相線の異なるろう材を組み合わせて配置し
た場合の実施例を具体的に説明する。An embodiment in which brazing materials having different liquid phase lines are combined and arranged in the vertical direction between the conductor wires, which is one of the present invention, will be specifically described below.
【0027】図2は図1のA−A方向の断面図を示す。
給排液箱1の中の各導体素線間の上下a〜fには本発明
のろう材が配置されている。図3に本発明のろう材の構
成を示す。図3に示すように、液相線の高いろう材5a
を中心に、その両面に前記ろう材より液相線の低いろう
材5b及び5cをサンドイッチ状に3枚重ねて複合化す
る。これを一対のろう材として、各導体素線間の上下に
配置してろう付けする。FIG. 2 is a sectional view taken along the line AA of FIG.
The brazing filler metal of the present invention is arranged above and below a to f between the conductor wires in the liquid supply / drainage box 1. FIG. 3 shows the constitution of the brazing material of the present invention. As shown in FIG. 3, a brazing material 5a having a high liquidus
To center, complexing with three sheets to sandwich the lower brazing material 5b and 5c of liquidus than the brazing material on both surfaces thereof. This is used as a pair of brazing materials, and is arranged above and below each conductor wire to be brazed.
【0028】この実施例では、複合化ろう材の中心に配
置される液相線の高いろう材として、Pが4wt%残部
がCuからなる液相温度が950℃、固相線温度が70
5℃のP−Cuろう材を使用した。このろう材の厚さは
0.2mm である。重ねる方法としては、異なる融点のろ
う材の薄板、または箔を上下方向から圧力を加えて接合
させたクラッド材を用いても良いし、別々のろう材の箔
を単に重ねて用いても良い。クラッド材を用いた方が、
取扱性は向上するので好ましい。In this example, as a brazing material having a high liquidus centered at the center of the composite brazing material, the liquidus temperature of P is 4 wt% and the balance is Cu, and the solidus temperature is 70 ° C.
A 5 ° C. P-Cu brazing material was used. The thickness of this brazing filler metal is 0.2 mm. As a stacking method, thin plates of brazing filler metals having different melting points or clad materials obtained by joining foils by applying pressure from the vertical direction may be used, or foils of different brazing filler metals may be simply stacked and used. It is better to use a clad material
It is preferable because the handleability is improved.
【0029】一方、液相線の低いろう材として、Pが5
wt%,Agが13w%,残部がCuからなる液相線温
度が815℃、固相線温度が640℃のP−Ag−Cu
(JIS規格BCup−5相当)のろう材を使用した。
このろう材の厚さは0.6mmである。液相線温度の異な
るろう材を組み合わせた複合ろう材を各導体素線間の上
下方向の各段a〜fに配置する。次にこれを給排液箱1
の中に配置し、最後に給排液箱に蓋7を配置する。ろう
付けは前記、給排液箱1を外部から高周波加熱によって
加熱する。加熱温度の最高は前記、液相線温度の低い方
のろう材の固相線温度(640℃)と液相線温度(815
℃)とのほぼ中間の750℃である。なお、加熱の過程
で給排液箱の外部から液相温度が815℃、固相温度が
640℃(P4.5〜5.5wt%−Ag14.5〜15.
5wt%−残Cu、JIS規格BCuP−5相当)のろ
う材を一部供給する。前記、方法によりろう付けされた
ろう付け部をX線CTで非破壊検査した結果、ろう付け
部の欠陥は従来の1/3に減少している。このろう付け
方法によって製造した回転電機用のコイルを出力50万
kWの交流発電機に適用した。その結果、長年にわた
り、コイル接合部からの漏水がなく、発電機の運転が安
定にできた。On the other hand, P is 5 as a brazing material having a low liquidus.
P-Ag-Cu having a liquidus temperature of 815 ° C. and a solidus temperature of 640 ° C., in which wt%, Ag is 13 w%, and the balance is Cu.
A brazing material (corresponding to JIS standard BCup-5) was used.
The brazing material has a thickness of 0.6 mm . The composite brazing material in which the brazing materials having different liquidus temperatures are combined is arranged in each of the vertical steps a to f between the conductor wires. Next, supply it to the drainage box 1
Finally, the lid 7 is placed on the liquid supply / drainage box. In the brazing, the liquid supply / drainage box 1 is heated from the outside by high frequency heating. The maximum heating temperature is the solidus temperature ( 640 ° C) and liquidus temperature (815 ° C) of the brazing filler metal with the lower liquidus temperature.
750 ° C., which is about halfway between the temperature and 750 ° C.). In the heating process, the liquid phase temperature was 815 ° C and the solid phase temperature was 640 ° C (P4.5-5.5wt% -Ag14.5-15.
5 wt% -remaining Cu, JIS standard BCuP-5 equivalent) is partially supplied. As a result of non-destructive inspection of the brazed portion brazed by the above method by X-ray CT, the defects in the brazed portion are reduced to 1/3 of the conventional one. The coil for a rotary electric machine manufactured by this brazing method was applied to an AC generator with an output of 500,000 kW. As a result, for many years, there was no water leakage from the coil joint, and the generator could operate stably.
【0030】(実施例2)この実施例では、複合化ろう
材の中心に配置される液相線の高いろう材として、Pが
2wt%−残部がCuからなる液相線温度が980℃、
固相線温度が705℃のP−Cuろう材を使用した。この
ろう材の厚さは0.1mm である。(Embodiment 2) In this embodiment, as a brazing material having a high liquidus centered in the center of the composite brazing material, the liquidus temperature of P is 2 wt% and the balance is Cu, and the liquidus temperature is 980 ° C.
A P-Cu brazing material having a solidus temperature of 705 ° C. was used. The thickness of this brazing material is 0.1 mm.
【0031】一方、前記、液相線の高いろう材の上下に
配置される液相線の低いろう材は、Pが5.5wt%−
Ag10wt%−残部Cu からなる液相線温度が81
0℃、固相線温度が640℃のP−Ag−Cuろう材を
使用した。On the other hand, P is 5.5 wt% -in the brazing material having a low liquidus which is arranged above and below the brazing material having a high liquidus.
The liquidus temperature of Ag10wt% -the balance Cu is 81
A P-Ag-Cu brazing filler metal having a temperature of 0 ° C. and a solidus temperature of 640 ° C. was used.
【0032】実施例1と同様に、液相線の高いろう材を
中心に、その上下に前記ろう材より液相線の低いろう材
をサンドイッチ状に重ねて3枚の複合ろう材とする。こ
れを一対のろう材として各銅体素線間の上下に配置す
る。次にこのろう材が配置された複数の導体素線を給排
液箱1内に配置して、最後に蓋7を配置する。この給排
液箱1を外部から高周波加熱によって最高720℃まで
加熱してろう付けする。なお、加熱の過程で給排液箱1
の外部からも液相温度が815℃、固相温度が640℃
(P4.5〜5.5wt%−Ag14.5〜15.5wt%
−残Cu、JIS規格BCuP−5相当)のろう材を一部
供給した。その結果、ろう付け欠陥のない給排液箱のろ
う付けが得られる。これによって、長年の運転でも漏水
のない回転電機用コイルが得られた。このろう付け方法
によって製造した回転電機用のコイルを出力100万k
Wの交流発電機に適用した。その結果、長年にわたり、
コイル接合部からの漏水がなく、発電機の運転が安定し
てできた。Similar to the first embodiment, a brazing material having a high liquidus is centered, and a brazing material having a lower liquidus than the brazing material is laminated in a sandwich form on the upper and lower sides of the brazing material to form three composite brazing alloys. Use as material. These are used as a pair of brazing materials and are arranged above and below each copper body wire. Next, a plurality of conductor wires on which the brazing material is arranged are arranged in the liquid supply / drainage box 1, and finally the lid 7 is arranged. The supply / drainage box 1 is externally heated by high-frequency heating up to 720 ° C. and brazed. In addition, in the process of heating,
Liquid phase temperature of 815 ℃ and solid phase temperature of 640 ℃ from outside
(P4.5-5.5wt% -Ag14.5-15.5wt%
-Remaining Cu, JIS standard BCuP-5 equivalent brazing material was partially supplied. The result is a braze of the supply / drainage box without brazing defects. As a result, a coil for a rotating electric machine was obtained that did not leak even after many years of operation. Output of a coil for a rotary electric machine manufactured by this brazing method is 1 million k
It was applied to a W alternator. As a result, over the years,
There was no water leakage from the coil joint, and the generator could be operated stably.
【0033】(実施例3)本実施例では、複合化ろう材
の中心に配置される液相線の高いろう材として、融点が
1083℃の銅箔を使用した。厚さは0.2mm である。Example 3 In this example, a copper foil having a melting point of 1083 ° C. was used as the brazing material having a high liquidus line, which was placed in the center of the composite brazing material. The thickness is 0.2 mm.
【0034】一方、液相線の高いろう材の上下に配置さ
れる液相線の低いろう材として、Pが5.0wt%残部
Cu からなる液相線温度が900℃、固相線温度が6
45℃のP−Cu(JIS規格BCuP−1相当)ろう
材を使用した。このろう材の厚さは0.6mm である。On the other hand, as a brazing material having a low liquidus which is disposed above and below the brazing material having a high liquidus, the liquidus temperature of P is 5.0 wt% and the balance Cu is 900 ° C., and the solidus temperature is 6
A P-Cu (corresponding to JIS standard BCuP-1) brazing material at 45 ° C. was used. The thickness of this brazing filler metal is 0.6 mm.
【0035】前記のごとく、液相線の高いろう材の中心
に、その上下に前記ろう材より液相線の低いろう材をサ
ンドイッチ状に重ねて3枚の複合ろう材とする。これを
一対のろう材として各導体素線間の上下に配置する。次
にこのろう材が配置された複数の導体素線を給排液箱内
に配置して、最後に蓋を配置する。この給排液箱を外部
から高周波加熱によって最高820℃まで加熱してろう
付けする。なお、加熱の過程で給排液箱の外部からも液
相温度が815℃、固相温度が640℃(P4.5〜5.5
wt%−Ag14.5〜15.5wt%−残Cu ,JI
S規格BCuP−5相当)のろう材を一部供給した。そ
の結果、ろう付け欠陥のない給排液箱のろう付けが得ら
れる。これによって、長年の運転でも漏水のない回転電
機用コイルが得られた。このろう付け方法によって製造
した回転電機用のコイルを出力100万kWの交流発電機
に適用した。その結果、長年にわたり、コイル接合部か
らの漏水がなく、発電機の運転が安定してできた。さら
に、漏水による発電機の漏電,停止と最悪の実態も避け
られる。As described above, a brazing material having a lower liquidus than the above brazing material is sandwiched in the center of the brazing material having a high liquidus to form three composite brazing materials. These are used as a pair of brazing materials and are arranged above and below each conductor wire. Next, a plurality of conductor wires on which the brazing material is arranged are arranged in the liquid supply / drainage box, and finally the lid is arranged. This supply / drainage box is heated from the outside by high frequency heating up to a maximum of 820 ° C. and brazed. During the heating process, the liquid phase temperature was 815 ° C and the solid phase temperature was 640 ° C (P4.5 to 5.5) from the outside of the supply / drainage box.
wt% -Ag 14.5 to 15.5 wt% -remaining Cu, JI
Part of the brazing material of S standard BCuP-5) was supplied. The result is a braze of the supply / drainage box without brazing defects. As a result, a coil for a rotating electric machine was obtained that did not leak even after many years of operation. The coil for a rotary electric machine manufactured by this brazing method was applied to an AC generator with an output of 1 million kW. As a result, for many years, there was no water leakage from the coil joint, and the generator could operate stably. Further, it is possible to avoid the worst situation of the generator due to leakage of water.
【0036】(実施例4)実施例4では給排液箱1内部
の各導体素線間の上下方向に液相線の異なるろう材を配
置してろう付けする実施例について説明する。つまり、
図2に示す各導体素線間a〜fの上側(蓋側)には液相
線温度の高いろう材を、c〜fの下側には液相線温度の
低いろう材を配置してろう付けする。本実施例では、導
体素線間a〜bの上側(蓋側)には液相線温度が900
℃のJIS規格BCuP−1相当を、c〜dの中間には
液相線温度が820℃のJIS規格BCuP−5相当
を、さらに、e〜fの下側には液相線温度が750℃の
JIS規格BCUp−4相当を配置してろう付けした。(Embodiment 4) In Embodiment 4, an embodiment in which brazing materials having different liquidus lines are arranged in the vertical direction between the conductor wires inside the liquid supply / drainage box 1 for brazing will be described. That is,
A brazing material having a high liquidus temperature is arranged on the upper side (lid side) between the conductor wires a to f shown in FIG. 2, and a brazing material having a low liquidus temperature is arranged on the lower side of c to f. Braze. In the present embodiment, the liquidus temperature is 900 on the upper side (cover side) between the conductor wires a to b.
℃ of JIS standard BCuP-1 equivalent, the liquidus temperature of 820 ℃ is equivalent to JIS standard BCuP-5 in the middle of c to d, and below e to f the liquidus temperature of 750 ℃. The JIS standard BCUp-4 equivalent was placed and brazed.
【0037】これを給排液箱1内に配置後、蓋74を配
置してこれを高周波加熱によって最高780℃まで加熱
してろう付けする。なお、加熱の過程で給排液箱の外部
からも実施例1と同様のろう材を一部供給する。このろ
う付け方法によって製造した回転電機用のコイルを出力
100万kWの交流発電機に適用した。その結果、コイ
ル接合部からの漏水がなく、発電機の運転が長年にわた
り、安定にできた。After this is placed in the liquid supply / drainage box 1, a lid 74 is placed and this is heated to a maximum of 780 ° C. by high frequency heating and brazed. In the heating process, the brazing filler metal similar to that of the first embodiment is partially supplied from the outside of the liquid supply / drainage box. The coil for a rotary electric machine manufactured by this brazing method was applied to an AC generator with an output of 1,000,000 kW. As a result, there was no water leakage from the coil joint, and the generator could be operated stably for many years.
【0038】[0038]
【発明の効果】本発明によれば、ブロックが欠陥なく接
合できる。これにより、ブロックが導電線である場合
は、接続部の電気抵抗が小さくなり、エネルギーロスを
低減できる。また、振動,回転等の機械的な力を受ける
部分に使用される接続部であれば、長期間にわたり接合
部に割れ,剥離などの生じない信頼性の高い接合部が提
供できる。According to the present invention, blocks can be joined without any defect. As a result, when the block is a conductive wire, the electrical resistance of the connection portion is reduced, and energy loss can be reduced. Further, as long as it is a connection portion used for a portion that receives a mechanical force such as vibration or rotation, it is possible to provide a highly reliable joint portion in which the joint portion is not cracked or separated for a long period of time.
【0039】また、ろう付け部の欠陥が減少し、信頼性
の高いろう付け部を有する回転電機体用のコイルが得ら
れるため、本コイルを使用した回転電機体は、長期間使
用した場合でもろう付け部からの水漏れがない。したが
って、漏水による発電機の漏電,停止と最悪の実態も避
けられ、効率のよい発電運転が可能となる。Further, since the defects of the brazing part are reduced and a coil for a rotary electric machine having a highly reliable brazing part can be obtained, the rotary electric machine using this coil can be used even for a long period of time. There is no water leakage from the brazed part. Therefore, it is possible to avoid the electric leakage and stoppage of the generator due to water leakage and the worst situation, and it is possible to perform efficient power generation operation.
【図1】本発明の給排液箱とコイル導体素線との接合部
の構造。FIG. 1 is a structure of a joint portion between a liquid supply / drainage box of the present invention and a coil conductor element wire.
【図2】本発明の実施例を示す図1の断面を示す。FIG. 2 shows a cross section of FIG. 1 showing an embodiment of the invention.
【図3】本発明の異なる融点のろう材を3層にして接合
する様子を示した図。FIG. 3 is a diagram showing a state in which brazing filler metals having different melting points according to the present invention are joined in three layers.
1…給排液箱、2…給排金具、3…接続片、4…給排液
箱内部、5…導体素線、6…ろう材、7…蓋。1 ... Supply / drainage box, 2 ... Supply / drain metal fittings, 3 ... Connection piece, 4 ... Inside of the supply / drainage box, 5 ... Conductor wires, 6 ... Brazing material, 7 ... Lid.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡辺 憲寛 茨城県日立市幸町三丁目1番1号 株式 会社 日立製作所 日立工場内 (72)発明者 岩城 裕二 茨城県日立市幸町三丁目1番1号 株式 会社 日立製作所 日立工場内 (56)参考文献 特開 昭52−39555(JP,A) 特開 昭61−169190(JP,A) 特開 平9−107646(JP,A) 特開 平9−28062(JP,A) 実開 昭56−145325(JP,U) (58)調査した分野(Int.Cl.7,DB名) H02K 3/22 H02K 3/24 H02K 15/04 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norihiro Watanabe 3-1, 1-1 Saiwaicho, Hitachi, Ibaraki Hitachi Ltd. Hitachi factory (72) Inventor Yuji Iwaki 3-1-1, Saiwaicho, Hitachi, Ibaraki No. 1 Stock company Hitachi Ltd. In Hitachi factory (56) Reference JP-A 52-39555 (JP, A) JP-A 61-169190 (JP, A) JP-A 9-107646 (JP, A) JP-A 9-28062 (JP, A) Actual development Sho-56-145325 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) H02K 3/22 H02K 3/24 H02K 15/04
Claims (7)
クを縦方向及び横方向にそれぞれ複数個並べて接合する
ブロック体の接合方法において、 融点の高いろう材よりなる薄板又は箔を該ろう材よりも
融点の低いろう材で挟んだサンドイッチ状の複合化ろう
材を、縦方向に並べられた前記ブロックの各段の間に配
置し、前記複合化ろう材を融点が低いろう材の固体相線
温度よりも高くかつ融点が高いろう材の液相線温度より
も低い温度に加熱して、前記ブロックを同時に接合する
ことを特徴とするブロック体の接合方法。1. A method of joining blocks, wherein a plurality of blocks each having a substantially rectangular parallelepiped shape are arranged side by side in a longitudinal direction and a transverse direction, and a thin plate or foil made of a brazing material having a high melting point is formed from the brazing material. A sandwich type composite brazing filler metal sandwiched between low melting point brazing filler metals is arranged between each step of the blocks arranged in the longitudinal direction, and the composite brazing filler metal is a solid phase wire of the low melting point brazing filler metal. A method of joining blocks, wherein the blocks are joined at the same time by heating to a temperature lower than the liquidus temperature of the brazing material having a higher melting point and a higher melting point.
体を流すための中空部を備えた中空コイル導体素線より
なることを特徴とするブロック体の接合方法。2. The method for joining block bodies according to claim 1, wherein the block is made of a hollow coil conductor wire having a hollow portion for flowing a cooling medium.
ちで融点が高いろう材がP−Cuろう材よリなり、融点
が低いろう材がP−Ag−Cuろう材よりなることを特
徴とするブロック体の接合方法。3. The composite brazing filler material according to claim 2, wherein the brazing filler metal having a high melting point is made of P-Cu brazing filler metal and the brazing filler metal having a low melting point is made of P-Ag-Cu brazing filler metal. A characteristic method of joining blocks.
ちで融点が高いろう材がCu箔よリなり、融点が低いろ
う材がP−Cuろう材よりなることを特徴とするブロッ
ク体の接合方法。4. The block body according to claim 2, wherein the brazing material having a high melting point is made of Cu foil and the brazing material having a low melting point is P-Cu brazing material among the composite brazing materials. How to join.
縦方向及び横方向に配置し、それらの端部を給排液箱に
ろう付けし、該導体素線の中空部に冷却媒体を供給する
構造の回転電機体コイルの製造方法において、 前記給排液箱と該中空コイル導体素線とのろう付け用の
ろう材は、融点の高いろう材よりなる薄板又は箔を該ろ
う材よりも融点の低いろう材で挟んだサンドイッチ状の
複合化ろう材とし、この複合化ろう材を縦方向に積み重
ねられた前記中空コイル導体素線の各段の間に配置し、
前記複合化ろう材のうちで融点が低いろう材の固体相線
温度よりも高くかつ融点が高いろう材の液相線温度より
も低い温度に加熱して、複数の前記中空コイル導体素線
と前記給排液箱とを一括して接合することを特徴とする
回転電機体コイルの製造方法。5. A plurality of block-shaped hollow coil conductor wires are arranged in a vertical direction and a horizontal direction, their ends are brazed to a supply / drainage box, and a cooling medium is placed in the hollow parts of the conductor wires. In the method for manufacturing a rotary electric machine coil having a structure for supplying, a brazing filler metal for brazing the liquid supply / drainage box and the hollow coil conductor element is a thin plate or foil made of a brazing filler metal having a high melting point. Also a sandwich-shaped composite brazing material sandwiched by brazing materials having a low melting point, the composite brazing material is arranged between the stages of the hollow coil conductor wires stacked vertically,
Among the composite brazing filler metals, the melting point is higher than the solid phase wire temperature of the brazing filler metal having a low melting point and is heated to a temperature lower than the liquidus temperature of the brazing filler metal having a high melting point, and a plurality of the hollow coil conductor wires are provided. A method of manufacturing a rotating electric machine coil, comprising jointing the supply / drainage box together.
ちで融点が高いろう材がP−Cuろう材よリなり、融点
が低いろう材がP−Ag−Cuろう材よりなることを特
徴とする回転電機体コイルの製造方法。6. The brazing material having a high melting point in the composite brazing material is made of a P-Cu brazing material, and the brazing material having a low melting point is made of a P-Ag-Cu brazing material in the composite brazing material. A method of manufacturing a rotating electric machine coil, which is characterized.
ちで融点が高いろう材がCu箔よリなり、融点が低いろ
う材がP−Cuろう材よりなることを特徴とする回転電
機体コイルの製造方法。7. A rotating electric machine according to claim 5, wherein the brazing material having a high melting point is made of Cu foil and the brazing material having a low melting point is P-Cu brazing material among the composite brazing materials. Body coil manufacturing method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20806896A JP3424450B2 (en) | 1995-08-07 | 1996-08-07 | Method of joining blocks and method of manufacturing coil for rotating electrical machine using the same |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7-200642 | 1995-08-07 | ||
JP20064295 | 1995-08-07 | ||
JP20806896A JP3424450B2 (en) | 1995-08-07 | 1996-08-07 | Method of joining blocks and method of manufacturing coil for rotating electrical machine using the same |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09107647A JPH09107647A (en) | 1997-04-22 |
JP3424450B2 true JP3424450B2 (en) | 2003-07-07 |
Family
ID=26512316
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20806896A Expired - Lifetime JP3424450B2 (en) | 1995-08-07 | 1996-08-07 | Method of joining blocks and method of manufacturing coil for rotating electrical machine using the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3424450B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7199338B2 (en) * | 2004-11-19 | 2007-04-03 | General Electric Company | Method and system for applying an isolation layer to a brazed end of a generator armature winding bar |
JP5722915B2 (en) * | 2010-12-28 | 2015-05-27 | 株式会社徳力本店 | Electrical contact material and manufacturing method thereof |
CN113953759B (en) * | 2021-10-20 | 2024-07-16 | 河南机电职业学院 | Method for repairing burnt anode steel claw by induction brazing/arc surfacing |
-
1996
- 1996-08-07 JP JP20806896A patent/JP3424450B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH09107647A (en) | 1997-04-22 |
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