JP3822849B2

JP3822849B2 - Rotating electric machine stator

Info

Publication number: JP3822849B2
Application number: JP2002240569A
Authority: JP
Inventors: 健中村; 英昭前田; 千春河瀬
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2002-08-21
Filing date: 2002-08-21
Publication date: 2006-09-20
Anticipated expiration: 2022-08-21
Also published as: JP2004080958A

Description

【０００１】
【発明の属する技術分野】
この発明は、回転電機固定子において、鋼板を積層してなる固定子鉄心の外周側に配されたコアボルトとコアボルトの外周部に配された円環からなるかご型積枠またはボアリングの振動を抑制すると共に、上記振動に基づいて固定子より発生する騒音を低減せしめた回転電機固定子に関するものである。
【０００２】
【従来の技術】
図１３は従来の回転電機固定子を示す斜視図である。図１３において、1は鋼板の積層により形成された固定子鉄心、４は鋼板の積層時にガイドとなるコアボルト、３は複数個並設された円環、５は上記円環３の円周上例えば軸対称の４箇所において上記円環３同士を機械的に連結する連結板、６は上記連結板５同士の間の円周上に補助連結板として挿入された強みである。そして、上記コアボルト４、円環３、連結板５、強み６は例えば溶接により一体に結合されてかご型積枠２を形成しており、このかご型積枠２と固定子鉄心１とが組み合わされて回転電機固定子を形成している。
【０００３】
なお、固定子鉄心１は、コアボルト４に沿って鋼板を積層した後、端板７を当て、この端板７および鋼板に通しボルト８を通して両側から締め付けられる。上記コアボルト４の一端は端板７にねじ止めされている。
【０００４】
図１４は従来の回転電機固定子の別の例の一部を示す斜視図であり、図において、１は固定子鉄心、４はコアボルト、９は２個が連結材１０で一体に形成され、その内周に上記コアボルト４が溶接により固定されたボアリングである。
【０００５】
上記図１３、図１４のいずれの構成においても、積層された固定子鉄心１はコアボルト４の両端側で軸方向に締め付けられている。コアボルト４は固定子鉄心１に接触させた状態で取り付けられており、この両者間には隙間が生じやすい。
【０００６】
【発明が解決しようとする課題】
ところで、上記のような構造では、固定子鉄心１の磁気振動により、固定子鉄心１とコアボルト４間の接触部でフレッティング（微動磨耗）が生じ、金属粉等が発生する原因となることがあった。
【０００７】
また、固定子鉄心１の磁気振動により、コアボルト４を介してかご型積枠２またはボアリング９が加振され、コアボルト４の折損等、回転電機固定子の損傷を惹き起こす可能性があった。
【０００８】
また、製作誤差等によりかご型積枠２またはボアリング９の固有振動数が電磁周波数と一致若しくは接近した場合、かご型積枠２またはボアリング９が共振し、磁気振動により加振され、過大振動を惹き起こす可能性があった。
【０００９】
また、上記現象により、固定子鉄心１とコアボルト４間より衝突音が発生し、騒音が増大する原因にもなっていた。
【００１０】
この発明は、上記の問題点を解消し、機械的にも強く、しかも回転時の騒音の少ない回転電機固定子を得ようとするものである。
【００１１】
【課題を解決するための手段】
この発明の請求項１に係る回転電機固定子は、複数のコアボルトと、内周に上記コアボルトを溶接し、軸方向に複数個並設された円環と、上記各円環同士をその中心軸対称の複数箇所において連結する平板状の連結板とからなるかご型積枠、および上記コアボルトに沿って積層された鋼板からなる固定子鉄心を備えた回転電機固定子において、上記平板状の連結板と上記固定子鉄心との間で軸方向の複数個所において、それぞれ上記固定子鉄心の円周方向に離れた２個所に上記固定子鉄心に対して上記連結板を機械的に突っ張る固定用補助具を設けたことを特徴とするものである。
【００１２】
また、請求項１に記載の回転電機固定子において、上記固定用補助具は、上記固定子鉄心と上記かご型積枠の連結板との間に挿入された押しばねであることを特徴とするものである。
【００１３】
また、請求項１に記載の回転電機固定子において、上記固定用補助具は、上記かご型積枠の連結板に螺挿され、先端が上記固定子鉄心に当たるボルトであることを特徴とするものである。
【００１４】
また、請求項１に記載の回転電機固定子において、上記固定用補助具は、上記固定子鉄心と上記かご型積枠の連結板との間に挿入されたジャッキボルトであることを特徴とするものである。
【００１５】
また、請求項１に記載の回転電機固定子において、上記固定用補助具は、バネ板の両端に螺挿され、先端が上記固定子鉄心に当たるボルトを有し、上記ボルトの調整により、上記固定子鉄心に対して上記かご型積枠の連結板を上記バネ板が押し上げるように上記連結板と上記固定子鉄心との間に挿入されていることを特徴とするものである。
【００１６】
また、請求項１に記載の回転電機固定子において、上記固定用補助具は、上記固定子鉄心に両脚が当たるコ形のバネ板、およびこのバネ板と上記連結板との間に挿入された押し板からなることを特徴とするものである。
【００１７】
また、請求項１に記載の回転電機固定子において、上記固定用補助具は、上記固定子鉄心に接する高さ調整用シム、このシムと上記連結板との間に挿入されたスペーサ、および上記連結板、スペーサ、およびシム相互の位置ずれを防ぐボルトまたはピンからなることを特徴とするものである。
【００１８】
また、請求項１に記載の回転電機固定子において、上記固定用補助具は、上記固定子鉄心に接する台座、およびこの台座と上記連結板との間に楔挿された一対のテーパーライナからなることを特徴とするものである。
【００１９】
また、この発明の請求項９に係る回転電機固定子は、複数のコアボルト、内周に上記コアボルトを溶接した複数のボアリング、および上記コアボルトに沿って積層された鋼板からなる固定子鉄心を備えたものにおいて、上記ボアリングの中心軸対称の複数箇所にボルト座を設け、このボルト座に螺挿されたボルトにより、上記固定子鉄心に対して上記ボアリングを機械的に突っ張るようにしたことを特徴とするものである。
【００２０】
また、この発明の請求項１０に係る回転電機固定子は、複数のコアボルト、内周に上記コアボルトを溶接した複数のボアリング、および上記コアボルトに沿って積層された鋼板からなる固定子鉄心を備えたものにおいて、上記ボアリングの中心軸対称の複数箇所において上記固定子鉄心と上記ボアリングとの間に台座を挿入し、上記台座により上記ボアリングを上記固定鉄心に対して機械的に突っ張るようにしたことを特徴とするものである。
【００２１】
【発明の実施の形態】
実施の形態１．
図１はこの発明の実施の形態１に係る回転電機固定子の要部を示す側面図、図２は図１のＡ−Ａ線に沿う断面図である。図１、図２において、１は回転電機の固定子鉄心、２は回転電機のかご型積枠である。このかご型積枠２は、軸方向に複数個並設された円環３と、これら円環３同士を結合するよう軸対称の複数箇所に挿入された平板状の連結板５と、連結板５の間の円周上に設けられ、円環３同士を補助的に連結する角材状の強み６と、円環３の内周に等間隔に多数取り付けられたコアボルト４とから構成され、連結板５、強み６、コアボルト４はいずれも円環３に溶接されている。
【００２２】
固定子鉄心１は鋼板をコアボルト４に沿って積層して形成される。コアボルト４は固定子鉄心１の端部のみで固定子鉄心１を固定しており、中央部ではコアボルト４と固定子鉄心１は接触させた状態であるため、隙間が生じやすい部位である。
【００２３】
この構造において、本実施の形態１では、かご型積枠２の連結板５と固定子鉄心１の間に押しバネ１１を用いた固定用補助具を組込む。この押しバネ１１挿入の一例は、図１、図２に示すように、連結板５の両側（円周方向）に１個ずつ（つまり２個）、また連結板５の軸方向に複数個、固定子鉄心１との間に挿入する。
【００２４】
この押しバネ１１は、固定子鉄心１に対して連結板５を押し上げるように作用し、固定子鉄心１からかご型積枠２を半径方向に突っ張る。この押しバネ１１の突っ張り力でかご型積枠２と固定子鉄心１が機械的に一体化され、これにより固定子鉄心１の磁気振動の振動方向とかご型積枠２（従ってコアボルト４）の振動方向が同じベクトルを向き、固定子鉄心１とコアボルト４間のフレッティング（微動磨耗）や衝突が回避される。また、上記一体化によりかご型積枠２の固有振動数が高くなり、電磁周波数に対して大きく離調させることが可能となる。その結果、かご型積枠２のフレッティングおよび共振現象による振動、騒音の増大を回避できる。
【００２５】
実施の形態２．
図３は実施の形態２に係る回転電機固定子の要部を示す正面断面図である。図３において、１は回転電機の固定子鉄心、２は回転電機のかご型積枠、３は円環、５は円環３を結合してかご型積枠２を構成する連結板、４は円環３の内周に固定されたコアボルトである。１２は連結板５に設けられたボルト穴に螺挿され、先端が固定子鉄心1に当たる固定用補助具であるボルトである。ボルト１２は連結板５の両側（円周方向）に１個ずつ（つまり２個）設けられ、図示していないが、軸方向には複数個設けられている。なお、円環３に対して連結板５が軸対称に例えば４箇所設けられているとすれば、その４箇所の連結板すべてに上記ボルトを設ける。
【００２６】
以上の構成において、ボルト１２を締め込むと、連結板５が固定子鉄心1に対して引き上げられることになり、固定子鉄心１に対してかご型積枠２を半径方向に突っ張らせてかご型積枠２と固定子鉄心１を一体化することができる。本実施の形態２では、実施の形態1に比べて固定子鉄心１と連結板５の一体化構造の剛性がより高くなり、固有振動数をさらに上昇させることができる。
【００２７】
実施の形態３．
図４は実施の形態３に係る回転電機固定子の要部を示す側面図、図５は図４のＢ−Ｂ線に沿う断面図である。図４、図５において、１は回転電機の固定子鉄心、２は回転電機のかご型積枠、３は複数個並設された円環、５は円環３同士を結合してかご型積枠２を構成する連結板、６は強み、４は円環３の内周に固定されたコアボルトである。１３は固定用補助具であるジャッキボルトで、これは図３のものと異なり、連結板５の下面と固定子鉄心１との間に挿入されている。
【００２８】
このジャッキボルト１３は、ジャッキボルト１３を締め上げ、連結板５を押し上げることで固定子鉄心１に対してかご型積枠２を突っ張り、かご型積枠２と固定子鉄心１を一体化できる。本実施の形態３では、実施の形態２に比べて連結板５のボルト穴加工が不要なため、製作の工数削減を図ることができる。
【００２９】
実施の形態４.
図６は実施の形態4に係る回転電機固定子の要部を示す正面断面図である。本実施の形態においては、かご型積枠２の連結板５と、固定子鉄心１との間に、ボルト１４とバネ板１５、座１６からなる固定用補助具を組込む。この固定用補助具は、バネ板１５の両端にボルト１４を螺挿したものを、ボルト１４の下端に座１６を介して固定子鉄心１に当て、バネ板１５を連結板５の下に当てて、ボルト１４を締め込むことにより、バネ板１５が連結板５を押し上げるようにしたもので、これにより固定子鉄心１からかご型積枠２を突っ張り、かご型積枠２と固定子鉄心１を機械的に一体化する。その他の構成は図1と同様である。
【００３０】
本実施の形態４によれば、かご型積枠２の温度が固定子鉄心１の温度よりも高くなり固定子鉄心１とかご型積枠２の隙間が拡大する状態が発生しても、バネ板１５自身の撓みと連結板５の撓みを生かし、かご型積枠２と固定子鉄心１の熱伸び差をバネ板１５と連結板５の撓みにより吸収し、固定用補助具の緩みを防止することができる。
【００３１】
なお、図示していないが、強み６と固定子鉄心１との間にもボルトとバネ板と座からなる同様の固定用補助具を設けてもよく、これも連結板５部分に設けられた固定用補助具と同様に作用をする。このように、強み６に対してもこの固定用補助具を設けることにより一層効果的なかご型積枠と固定子鉄心の一体化ができる。
【００３２】
実施の形態５．
図７は実施の形態５に係る回転電機固定子の要部を示す正面断面図である。本実施の形態では、図７に示すように、連結板５と、固定子鉄心１の間に、押し板１７とこれに重なるバネ板１８からなる固定用補助具を、コ形のバネ板１８の両脚が固定子鉄心１に当たるようにして組込む。押し板１７とバネ板１８を組み込む際には、連結板５を油圧ラムやジャッキアップ工具等を使用して押し上げた状態で組込み、バネ板１８および連結板５を撓ませる。その他の構成は図１と同様である。
【００３３】
実施の形態５によれば、実施の形態４に比べ接触支持部の数を低減でき、構造の安定性が増加する。
【００３４】
実施の形態６．
図８は実施の形態６に係る回転電機固定子の要部を示す正面断面図である。本実施の形態６は、図８に示すように、連結板５と、固定子鉄心１の間に、スペーサ１９と固定子鉄心１の周面に圧着する高さ調整用シム２０からなる固定用補助具を組込む。固定用補助具であるスペーサ１９と高さ調整用シム２０を組み込む際には、連結板５を油圧ラムやジャッキアップ工具等を使用して押し上げた状態で組込み、連結板５を撓ませる。固定用補助具を組み込んだ後に、連結板５、スペーサ１９、高さ調整用シム２０に予め加工されているボルト穴２１に、位置ずれ防止用のボルト２２またはピンを挿入し、スペーサ１９、高さ調整用シム２０、連結板５の相互位置ずれを防止するよう一体化する。ボルト２２は高さ調整用シム２０に設けられたねじ穴に螺合される。
【００３５】
実施の形態６によれば、実施の形態５に比べ更に接触支持部の数を低減でき、構造安定性が増加する。
【００３６】
実施の形態７．
図９は実施の形態７に係る回転電機固定子の要部を示す側面図、図１０は図９のＤ−Ｄ線に沿う拡大断面図である。図９、図１０において、連結板５と、固定子鉄心１の間に、一対のテーパーライナ２３と固定子鉄心１に当たる台座２４からなる固定用補助具を組込む。固定用補助具であるテーパーライナ２３、台座２４の組み込みは、台座２４と連結板５間に、テーパーライナ２３を連結板５の側面から打ち込むことで行い、同時に連結板５の撓みを利用する。
【００３７】
実施の形態７によれば、油圧ラムやジャッキアップ工具等を使用することなく容易に固定用補助具を組み込むことができ、かつ、実施の形態６と同等の機能、安定性を確保できる。
【００３８】
実施の形態８．
図１１は実施の形態８に係る回転電機固定子の要部を示す斜視図である。図１１において、１は回転電機の固定子鉄心、９は図１４に示したと同様な回転電機固定子のボアリング、４はコアボルト、２５はボアリング９の側面に固定されたボルト座、２６はボルト座２５に螺挿されたボルトである。
【００３９】
ボアリング９は、図１４に示すように、矩形断面の円リング２つを支え金１０で連結した構造である。ボアリング構造ではかご型積枠の代わりに軸方向に複数個のボアリング９を取り付けコアボルト４と溶接する構造であり、ボアリング間には連結板はない。この構造において、ボアリング９の側面にボルト穴を加工したボルト座２５を溶接してボルト２６を螺挿する。ボルト２６を締め込み、ボアリング９を押し上げることで、固定子鉄心１に対してボアリング９を突っ張る。このようにボアリング９と固定子鉄心１を一体化することにより実施の形態２と同等の機能を持たせることができる。
【００４０】
実施の形態９．
図１２は実施の形態９に係る回転電機固定子の要部を示す正面断面図である。図１２において、１は回転電機の固定子鉄心、９は回転電機のボアリング、４はコアボルトである。固定子鉄心１とボアリング９の間に台座２７を組込むことにより、固定子鉄心１に対してボアリング９を突っ張り、ボアリング９と固定子鉄心１を一体化する。
【００４１】
実施の形態９によれば、実施の形態８に比べてボアリング側面にジャッキボルト座の取り付け加工が不要で、製作工数削減による作業性が向上する。
【００４２】
【発明の効果】
以上のように、請求項１に係る発明によれば、固定用補助具を用いて固定子鉄心とかご型積枠を一体化することにより、固定子鉄心の磁気振動の振動方向と、かご型積枠の振動方向が同じベクトルを向き、固定子鉄心とコアボルト間のフレッティングや衝突が回避される。また、上記一体化によりかご型積枠の固有振動数を上昇させ、電磁周波数に対して大きく離調させることが可能となる。その結果、かご型積枠のフレッティングおよび共振現象による振動・騒音増大を回避できる。
【００４３】
また、請求項２に係る発明によれば、固定用補助具として、押しバネを用いることにより、連結板の加工を必要とせず、作業工数を低減することができる。
【００４４】
また、請求項３に係る発明によれば、固定用補助具として、連結板に螺挿されたボルトを用いることにより、固定子鉄心と連結板の一体化構造の剛性がより高くなり、固有振動数をさらに上昇させることができる。
【００４５】
また、請求項４に係る発明によれば、固定用補助具として、連結板と固定子鉄心との間にジャッキボルトを挿入し、ジャッキボルトを締め上げ、連結板を押し上げることで固定子鉄心に対してかご型積枠を突っ張り、かご型積枠と固定子鉄心を一体化しているので、固定子鉄心と連結板との一体化構造の剛性が高い上、連結板のボルト穴加工が不要なため、製作の工数削減を図ることができる。
【００４６】
また、請求項５に係る発明によれば、固定用補助具として、バネ板とボルトを用いているため、かご型積枠の温度が固定子鉄心の温度よりも高くなり固定子鉄心とかご型積枠の隙間が拡大する状態が発生しても、バネ板自身の撓みと連結板の撓みを生かし、かご型積枠と固定子鉄心の熱伸び差をバネ板と連結板の撓みにより吸収し、固定用補助具の緩みを防止することができる。
【００４７】
また、請求項６に係る発明によれば、請求項５のものよりも接触支持部の数を低減でき、構造の安定性が増加する。
【００４８】
また、請求項７に係る発明によれば、請求項６のものより更に接触支持部の数を低減でき、構造安定性が増加する。
【００４９】
また、請求項８に係る発明によれば、テーパーライナを用いることにより、油圧ラムやジャッキアップ工具等を使用することなく容易に固定用補助具を組み込むことができるので、作業が容易である。
【００５０】
また、請求項９に係る発明によれば、ボアリングを用いた回転電機固定子において、固定子鉄心とコアボルト間のフレッティングや衝突が回避でき、フレッティングおよび共振現象による振動・騒音増大を回避できる。
【００５１】
また、請求項１０に係る発明によれば、請求項９のものに比べてボアリング側面にボルト座の取り付け加工が不要で、製作工数削減による作業性が向上する。
【図面の簡単な説明】
【図１】この発明の実施の形態１に係る回転電機固定子の要部を示す側面図である。
【図２】図１のＡ−Ａ線に沿う断面図である。
【図３】この発明の実施の形態２に係る回転電機固定子の要部を示す正面断面図である。
【図４】この発明の実施の形態３に係る回転電機固定子の要部を示す側面図である。
【図５】図４のＢ−Ｂ線に沿う断面図である。
【図６】この発明の実施の形態４に係る回転電機固定子の要部を示す正面断面図である。
【図７】この発明の実施の形態５に係る回転電機固定子の要部を示す正面断面図である。
【図８】この発明の実施の形態６に係る回転電機固定子の要部を示す正面断面図である。
【図９】この発明の実施の形態７に係る回転電機固定子の要部を示す側面図である。
【図１０】図９のＤ−Ｄ線に沿う拡大断面図である。
【図１１】この発明の実施の形態８に係る回転電機固定子の要部を示す斜視図である。
【図１２】この発明の実施の形態９に係る回転電機固定子の要部を示す正面断面図である。
【図１３】従来の回転電機固定子を示す斜視図である。
【図１４】従来の別の形の回転電機固定子の一部を示す斜視図である。
【符号の説明】
１固定子鉄心、２かご型積枠、
３円環、４コアボルト、
５連結板、６強み、
７端板、８通しボルト、
９ボアリング、１０連結材、
１１押しバネ、１２ボルト、
１３ジャッキボルト、１４ボルト、
１５バネ板、１６座、
１７押し板、１８バネ板、
１９スペーサ、２０高さ調整用シム、
２１連結板に加工されたボルト穴、２２ボルト、
２３テーパーライナ、２４台座、
２５ボルト座、２６ボルト、
２７台座。[0001]
BACKGROUND OF THE INVENTION
The present invention suppresses vibrations of a cage-type frame or boring made of a core bolt arranged on the outer peripheral side of a stator core formed by stacking steel plates and a ring arranged on the outer peripheral portion of the core bolt in a rotating electric machine stator. In addition, the present invention relates to a rotating electrical machine stator in which noise generated from the stator based on the vibration is reduced.
[0002]
[Prior art]
FIG. 13 is a perspective view showing a conventional rotating electric machine stator. In FIG. 13, 1 is a stator core formed by laminating steel plates, 4 is a core bolt that serves as a guide when laminating steel plates, 3 is a ring arranged in parallel, 5 is on the circumference of the ring 3, for example A connecting plate 6 for mechanically connecting the annular rings 3 at four axisymmetric positions, and 6 is a strength inserted as an auxiliary connecting plate on the circumference between the connecting plates 5. The core bolt 4, the ring 3, the connecting plate 5, and the strength 6 are joined together by, for example, welding to form a cage-type product frame 2, and the cage-type product frame 2 and the stator core 1 are combined. Thus, a rotating electric machine stator is formed.
[0003]
In addition, after laminating steel plates along the core bolt 4, the stator core 1 is tightened from both sides through the end plate 7 and through the end plate 7 and the steel plate through the bolts 8. One end of the core bolt 4 is screwed to the end plate 7.
[0004]
FIG. 14 is a perspective view showing a part of another example of a conventional rotating electric machine stator, in which 1 is a stator core, 4 is a core bolt, 9 is integrally formed of two connecting members 10, It is a bore ring in which the core bolt 4 is fixed to the inner periphery thereof by welding.
[0005]
13 and 14, the stacked stator cores 1 are tightened in the axial direction on both ends of the core bolt 4. The core bolt 4 is attached in a state in which it is in contact with the stator core 1, and a gap is easily generated between the two.
[0006]
[Problems to be solved by the invention]
By the way, in the structure as described above, fretting (fine wear) occurs at the contact portion between the stator core 1 and the core bolt 4 due to the magnetic vibration of the stator core 1, which may cause metal powder or the like. there were.
[0007]
In addition, the cage frame 2 or the bore ring 9 is vibrated through the core bolt 4 due to the magnetic vibration of the stator core 1, which may cause damage to the rotating electrical machine stator such as breakage of the core bolt 4.
[0008]
In addition, when the natural frequency of the car-shaped product frame 2 or the bore ring 9 coincides with or approaches the electromagnetic frequency due to a manufacturing error or the like, the car-shaped product frame 2 or the bore ring 9 resonates and is vibrated by the magnetic vibration, causing excessive vibration There was a possibility of arousing.
[0009]
In addition, due to the above phenomenon, a collision sound is generated between the stator iron core 1 and the core bolt 4, which causes an increase in noise.
[0010]
The present invention is intended to solve the above problems and to obtain a rotating electrical machine stator that is mechanically strong and has low noise during rotation.
[0011]
[Means for Solving the Problems]
Rotating electrical machine stator according to claim 1 of the present invention includes a plurality of core bolt, the inner welding the core bolt circumferentially, its central axis circular ring having a plurality Konami設 axially, the respective circular rings cage product frame comprising a plate-shaped connecting plate for connecting the plurality of locations of symmetry, and in the rotating electric machine stator with a stator core made of laminated steel sheets along the core bolt, the plate-shaped connecting plate above in a plurality of locations in the axial direction between the stator core, mechanically fixed that Tsuppa the connecting plate at two positions apart respectively in the circumferential direction of the stator core relative to the stator core and It is characterized by providing an auxiliary tool.
[0012]
The rotating electrical machine stator according to claim 1, wherein the fixing auxiliary tool is a push spring inserted between the stator core and the connecting plate of the cage stack. Is.
[0013]
The rotating electrical machine stator according to claim 1, wherein the auxiliary assisting tool is a bolt that is screwed into a connecting plate of the cage stack and has a tip that contacts the stator core. It is.
[0014]
The rotating electrical machine stator according to claim 1, wherein the fixing auxiliary tool is a jack bolt inserted between the stator core and the connecting plate of the cage stack. Is.
[0015]
The rotating electrical machine stator according to claim 1, wherein the fixing auxiliary tool includes a bolt screwed into both ends of a spring plate and having a tip abutting against the stator iron core. The connecting plate of the cage stack is inserted between the connecting plate and the stator core so that the spring plate pushes up the connecting plate of the cage stack with respect to the core.
[0016]
The rotating electrical machine stator according to claim 1, wherein the fixing auxiliary tool is inserted between a U-shaped spring plate having both legs hitting the stator iron core, and the spring plate and the connecting plate. It consists of a push plate.
[0017]
The rotating electrical machine stator according to claim 1, wherein the fixing auxiliary tool includes a height adjusting shim that contacts the stator core, a spacer inserted between the shim and the connecting plate, and the above The connecting plate, the spacer, and the shim are made up of bolts or pins that prevent misalignment between the shims.
[0018]
The rotating electrical machine stator according to claim 1, wherein the fixing auxiliary tool includes a pedestal that is in contact with the stator core, and a pair of tapered liners that are wedge-inserted between the pedestal and the connecting plate. It is characterized by this.
[0019]
According to a ninth aspect of the present invention, a rotating electrical machine stator includes a plurality of core bolts, a plurality of bores in which the core bolts are welded to an inner periphery, and a stator core made of a steel plate laminated along the core bolts. The present invention is characterized in that a bolt seat is provided at a plurality of positions symmetrical with respect to the central axis of the bore ring, and the bore ring is mechanically stretched against the stator core by a bolt screwed into the bolt seat. To do.
[0020]
According to a tenth aspect of the present invention, a rotating electrical machine stator includes a plurality of core bolts, a plurality of bores in which the core bolts are welded to the inner periphery, and a stator core made of a steel plate laminated along the core bolts. The pedestal is inserted between the stator core and the bore ring at a plurality of positions symmetrical with respect to the central axis of the bore ring, and the bore ring is mechanically stretched with respect to the fixed core by the pedestal. It is a feature.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
1 is a side view showing a main part of a rotary electric machine stator according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1 and 2, reference numeral 1 denotes a stator core of a rotating electric machine, and reference numeral 2 denotes a cage frame of the rotating electric machine. The cage stack 2 includes a plurality of circular rings 3 arranged in parallel in the axial direction, a plate-like connecting plate 5 inserted at a plurality of axially symmetrical positions so as to connect the rings 3, and a connecting plate. 5 which is provided on a circumference between 5 and is composed of a square-shaped strength 6 that supplementarily connects the rings 3 and core bolts 4 that are attached to the inner circumference of the ring 3 at equal intervals. The plate 5, the strength 6 and the core bolt 4 are all welded to the ring 3.
[0022]
The stator core 1 is formed by laminating steel plates along the core bolt 4. Since the core bolt 4 fixes the stator core 1 only at the end of the stator core 1, and the core bolt 4 and the stator core 1 are in contact with each other at the center, the core bolt 4 is a portion where a gap is likely to occur.
[0023]
In this structure, in the first embodiment, a fixing auxiliary tool using a pressing spring 11 is assembled between the connecting plate 5 of the cage stack 2 and the stator core 1. As shown in FIGS. 1 and 2, one example of the insertion of the push spring 11 is one (that is, two) on both sides (circumferential direction) of the connecting plate 5, and plural in the axial direction of the connecting plate 5, Insert between the stator core 1.
[0024]
The push spring 11 acts to push up the connecting plate 5 against the stator core 1, and pushes the cage stack 2 from the stator core 1 in the radial direction. The cage-type frame 2 and the stator core 1 are mechanically integrated by the tension force of the push spring 11, whereby the vibration direction of the magnetic vibration of the stator core 1 and the cage-type frame 2 (therefore, the core bolt 4) The vectors having the same vibration direction are directed to avoid fretting (fine wear) and collision between the stator core 1 and the core bolt 4. Moreover, the natural frequency of the cage frame 2 is increased by the above integration, and can be greatly detuned with respect to the electromagnetic frequency. As a result, it is possible to avoid an increase in vibration and noise due to fretting and resonance phenomenon of the cage frame 2.
[0025]
Embodiment 2. FIG.
FIG. 3 is a front sectional view showing a main part of the rotating electrical machine stator according to the second embodiment. In FIG. 3, 1 is a stator core of a rotating electrical machine, 2 is a cage frame of the rotating electrical machine, 3 is a ring, 5 is a connecting plate that combines the rings 3 to form the cage stack 2, and It is a core bolt fixed to the inner periphery of the ring 3. Reference numeral 12 denotes a bolt that is a fixing aid that is screwed into a bolt hole provided in the connecting plate 5 and that has a tip that hits the stator core 1. One bolt 12 is provided on each side (circumferential direction) of the connecting plate 5 (that is, two), and a plurality of bolts 12 are provided in the axial direction, although not shown. If, for example, four connecting plates 5 are provided symmetrically with respect to the ring 3, the bolts are provided on all of the four connecting plates.
[0026]
In the above configuration, when the bolt 12 is tightened, the connecting plate 5 is pulled up with respect to the stator core 1, and the cage-type stack 2 is stretched in the radial direction with respect to the stator core 1 to form a cage. The product frame 2 and the stator core 1 can be integrated. In the second embodiment, the rigidity of the integrated structure of the stator core 1 and the connecting plate 5 is higher than that in the first embodiment, and the natural frequency can be further increased.
[0027]
Embodiment 3 FIG.
4 is a side view showing the main part of the rotating electrical machine stator according to Embodiment 3, and FIG. 5 is a cross-sectional view taken along line BB of FIG. 4 and 5, 1 is a stator core of a rotating electric machine, 2 is a cage frame of the rotating electric machine, 3 is a plurality of circular rings arranged in parallel, and 5 is a cage product formed by connecting the rings 3 together. A connecting plate constituting the frame 2, 6 is strength, and 4 is a core bolt fixed to the inner periphery of the ring 3. Reference numeral 13 denotes a jack bolt which is a fixing auxiliary tool, which is inserted between the lower surface of the connecting plate 5 and the stator core 1, unlike the one shown in FIG. 3.
[0028]
The jack bolts 13 can tighten the car bolts 13 and push up the connecting plate 5 to push the car-shaped stack 2 against the stator core 1 so that the car-shaped stack 2 and the stator core 1 can be integrated. In this Embodiment 3, compared with Embodiment 2, since the bolt hole processing of the connection board 5 is unnecessary, the man-hour of manufacture can be aimed at.
[0029]
Embodiment 4.
FIG. 6 is a front sectional view showing a main part of the rotating electric machine stator according to the fourth embodiment. In the present embodiment, a fixing auxiliary tool including a bolt 14, a spring plate 15, and a seat 16 is assembled between the connecting plate 5 of the cage-type stack 2 and the stator core 1. In this fixing auxiliary tool, a bolt 14 screwed into both ends of a spring plate 15 is applied to the stator core 1 via a seat 16 at the lower end of the bolt 14, and the spring plate 15 is applied under the connecting plate 5. Thus, the bolt 14 is tightened so that the spring plate 15 pushes up the connecting plate 5, whereby the car-type stack 2 is stretched from the stator core 1, and the car-type stack 2 and the stator core 1. Are mechanically integrated. Other configurations are the same as those in FIG.
[0030]
According to the fourth embodiment, even when the temperature of the car-shaped stack 2 is higher than the temperature of the stator core 1 and the gap between the stator core 1 and the car-shaped stack 2 is expanded, the spring Taking advantage of the bending of the plate 15 itself and the bending of the connecting plate 5, the thermal expansion difference between the cage frame 2 and the stator core 1 is absorbed by the bending of the spring plate 15 and the connecting plate 5 to prevent loosening of the fixing aids. can do.
[0031]
Although not shown in the drawing, a similar fixing aid composed of a bolt, a spring plate and a seat may be provided between the strength 6 and the stator core 1, and this is also provided on the connecting plate 5 portion. Acts in the same way as a fixing aid. As described above, the cage-type stacking frame and the stator core can be more effectively integrated by providing this fixing auxiliary tool for the strength 6 as well.
[0032]
Embodiment 5 FIG.
FIG. 7 is a front cross-sectional view showing a main part of the rotating electrical machine stator according to the fifth embodiment. In the present embodiment, as shown in FIG. 7, a fixing auxiliary tool composed of a push plate 17 and a spring plate 18 that overlaps the connecting plate 5 and the stator core 1 is replaced with a U-shaped spring plate 18. Assemble both legs so that they touch the stator core 1. When the push plate 17 and the spring plate 18 are assembled, the connection plate 5 is assembled in a state where the connection plate 5 is pushed up using a hydraulic ram, a jackup tool or the like, and the spring plate 18 and the connection plate 5 are bent. Other configurations are the same as those in FIG.
[0033]
According to the fifth embodiment, the number of contact support portions can be reduced as compared with the fourth embodiment, and the stability of the structure is increased.
[0034]
Embodiment 6 FIG.
FIG. 8 is a front sectional view showing a main part of the rotating electric machine stator according to the sixth embodiment. In the sixth embodiment, as shown in FIG. 8, the fixing plate includes a spacer 19 and a height adjusting shim 20 that is crimped to the peripheral surface of the stator core 1 between the connecting plate 5 and the stator core 1. Incorporate auxiliary equipment. When assembling the spacer 19 and the height adjusting shim 20 which are fixing aids, the connecting plate 5 is assembled in a state where it is pushed up using a hydraulic ram, jack-up tool or the like, and the connecting plate 5 is bent. After incorporating the fixing auxiliary tool, a bolt 22 or a pin for preventing misalignment is inserted into a bolt hole 21 pre-processed in the connecting plate 5, the spacer 19, and the height adjusting shim 20. The height adjusting shim 20 and the connecting plate 5 are integrated so as to prevent mutual displacement. The bolt 22 is screwed into a screw hole provided in the height adjusting shim 20.
[0035]
According to the sixth embodiment, the number of contact support portions can be further reduced as compared with the fifth embodiment, and the structural stability is increased.
[0036]
Embodiment 7 FIG.
FIG. 9 is a side view showing the main part of the rotating electrical machine stator according to Embodiment 7, and FIG. 10 is an enlarged cross-sectional view taken along the line DD of FIG. 9 and 10, a fixing auxiliary tool including a pair of tapered liners 23 and a pedestal 24 that contacts the stator core 1 is assembled between the connecting plate 5 and the stator core 1. The taper liner 23 and the pedestal 24, which are fixing aids, are assembled by driving the taper liner 23 from the side surface of the connection plate 5 between the base 24 and the connection plate 5, and at the same time, the bending of the connection plate 5 is used.
[0037]
According to the seventh embodiment, it is possible to easily incorporate the fixing auxiliary tool without using a hydraulic ram, a jack-up tool or the like, and to ensure the same function and stability as in the sixth embodiment.
[0038]
Embodiment 8 FIG.
FIG. 11 is a perspective view showing a main part of the rotating electrical machine stator according to the eighth embodiment. In FIG. 11, 1 is a stator core of a rotating electrical machine, 9 is a bore of a rotating electrical machine stator similar to that shown in FIG. 14, 4 is a core bolt, 25 is a bolt seat fixed to the side of the bore ring 9, and 26 is a bolt seat. The bolt is screwed into 25.
[0039]
Boaringu 9, as shown in FIG. 14, a structure obtained by connecting two two yen-ring of rectangular cross-section supported gold 10. In the bore structure, a plurality of bore rings 9 are attached in the axial direction in place of the cage stack and welded to the core bolt 4, and there is no connecting plate between the bore rings. In this structure, a bolt seat 25 in which a bolt hole is machined is welded to a side surface of the bore ring 9 and a bolt 26 is screwed. By tightening the bolt 26 and pushing up the bore ring 9, the bore ring 9 is stretched against the stator core 1. Thus, the function equivalent to Embodiment 2 can be given by integrating the bore ring 9 and the stator core 1.
[0040]
Embodiment 9 FIG.
FIG. 12 is a front sectional view showing a main part of the rotating electric machine stator according to the ninth embodiment. In FIG. 12, 1 is a stator core of a rotating electrical machine, 9 is a bore of the rotating electrical machine, and 4 is a core bolt. By mounting the base 27 between the stator core 1 and the bore ring 9, the bore ring 9 is stretched against the stator core 1, and the bore ring 9 and the stator core 1 are integrated.
[0041]
According to the ninth embodiment, it is not necessary to attach a jack bolt seat on the side surface of the bore ring as compared with the eighth embodiment, and the workability by reducing the number of manufacturing steps is improved.
[0042]
【The invention's effect】
As described above, according to the first aspect of the present invention, the stator core and the cage frame are integrated by using the fixing auxiliary tool, so that the direction of the magnetic vibration of the stator core and the cage type are integrated. Frequencies and collisions between the stator core and the core bolt are avoided because the vibration direction of the product frame is directed to the same vector. In addition, the integration allows the natural frequency of the cage frame to be increased and greatly detuned with respect to the electromagnetic frequency. As a result, it is possible to avoid an increase in vibration and noise due to the fretting of the cage frame and the resonance phenomenon.
[0043]
Moreover, according to the invention which concerns on Claim 2, by using a press spring as an auxiliary tool for fixation, the process of a connection board is not required but an operation man-hour can be reduced.
[0044]
Further, according to the invention of claim 3, by using a bolt screwed into the connecting plate as an auxiliary tool for fixing, the rigidity of the integrated structure of the stator core and the connecting plate becomes higher, and the natural vibration The number can be further increased.
[0045]
According to the invention of claim 4, as a fixing auxiliary tool, a jack bolt is inserted between the connecting plate and the stator core, the jack bolt is tightened, and the connecting plate is pushed up to the stator core. On the other hand, the cage-type stacking frame is stretched and the cage-type stacking frame and the stator core are integrated. Therefore, the rigidity of the integrated structure of the stator core and the connecting plate is high, and the bolt holes on the connecting plate are not required. Therefore, it is possible to reduce the number of manufacturing steps.
[0046]
Further, according to the invention of claim 5, since the spring plate and the bolt are used as the fixing auxiliary tools, the temperature of the cage frame becomes higher than the temperature of the stator core, and the stator core and the cage type. Even when the gap between the product frames expands, the deflection of the spring plate itself and the connection plate are utilized to absorb the difference in thermal expansion between the cage-type product frame and the stator core by the deflection of the spring plate and the connection plate. The loosening of the fixing aid can be prevented.
[0047]
Moreover, according to the invention which concerns on Claim 6, the number of contact support parts can be reduced rather than the thing of Claim 5, and stability of a structure increases.
[0048]
Moreover, according to the invention which concerns on Claim 7, the number of contact support parts can further be reduced rather than the thing of Claim 6, and structural stability increases.
[0049]
According to the invention of claim 8, by using the taper liner, it is possible to easily incorporate the fixing auxiliary tool without using a hydraulic ram, a jack-up tool, etc., so that work is easy.
[0050]
According to the ninth aspect of the invention, in the rotating electric machine stator using the bore ring, fretting and collision between the stator core and the core bolt can be avoided, and increase in vibration and noise due to fretting and resonance phenomenon can be avoided. .
[0051]
Further, according to the invention according to claim 10, it is not necessary to mount the bolt seat on the side surface of the bore ring as compared with that according to claim 9, and the workability by reducing the number of manufacturing steps is improved.
[Brief description of the drawings]
FIG. 1 is a side view showing a main part of a rotary electric machine stator according to Embodiment 1 of the present invention.
FIG. 2 is a cross-sectional view taken along the line AA in FIG.
FIG. 3 is a front sectional view showing a main part of a rotary electric machine stator according to Embodiment 2 of the present invention.
FIG. 4 is a side view showing a main part of a rotary electric machine stator according to Embodiment 3 of the present invention.
5 is a cross-sectional view taken along line BB in FIG.
FIG. 6 is a front sectional view showing a main part of a rotary electric machine stator according to Embodiment 4 of the present invention.
FIG. 7 is a front sectional view showing a main part of a rotary electric machine stator according to Embodiment 5 of the present invention.
FIG. 8 is a front sectional view showing a main part of a rotary electric machine stator according to Embodiment 6 of the present invention.
FIG. 9 is a side view showing a main part of a rotary electric machine stator according to Embodiment 7 of the present invention.
10 is an enlarged cross-sectional view taken along the line DD of FIG.
FIG. 11 is a perspective view showing a main part of a rotary electric machine stator according to Embodiment 8 of the present invention.
FIG. 12 is a front sectional view showing a main part of a rotary electric machine stator according to Embodiment 9 of the present invention.
FIG. 13 is a perspective view showing a conventional rotating electric machine stator.
FIG. 14 is a perspective view showing a part of another conventional rotating electric machine stator.
[Explanation of symbols]
1 stator core, 2 cage frame,
3 ring, 4 core bolt,
5 connecting plates, 6 strengths,
7 end plate, 8 through bolt,
9 Boring, 10 connecting material,
11 push springs, 12 bolts,
13 jack bolts, 14 bolts,
15 spring plate, 16 seats,
17 push plate, 18 spring plate,
19 spacer, 20 height adjustment shim,
21 bolt holes machined in the connecting plate, 22 bolts,
23 taper liner, 24 pedestal,
25 bolt seat, 26 bolt,
27 Pedestal.

Claims

From a plurality of core bolt, welding the core bolt on the inner periphery, a circular ring is a plurality Konami設 axially, a flat coupling plate for coupling the plurality of positions of the central axis of symmetry of said respective circular rings made cage product frame, and the rotary electric machine stator with a stator core made of laminated steel sheets along the core bolt, a plurality of locations in the axial direction between the plate-shaped connecting plate and the stator core in each rotating electrical machine fixed, characterized in that a mechanically Tsuppa that solid titration, aid the coupling plate relative to the stator core at two positions spaced in the circumferential direction of the stator core Child.

2. The rotating electrical machine stator according to claim 1, wherein the fixing auxiliary tool is a pressing spring inserted between the stator core and the connecting plate of the cage stack.

2. The rotating electrical machine stator according to claim 1, wherein the fixing auxiliary tool is a bolt that is screwed into a connecting plate of the squirrel-shaped stacking frame and has a tip that hits the stator core.

The rotating electrical machine stator according to claim 1, wherein the fixing auxiliary tool is a jack bolt inserted between the stator iron core and the connecting plate of the cage stack.

The fixing auxiliary tool has a bolt screwed into both ends of the spring plate, and a tip of the fixing plate that hits the stator core. By adjusting the bolt, the connecting plate of the cage stack is attached to the stator core. The rotating electrical machine stator according to claim 1, wherein the stator is inserted between the connecting plate and the stator core so that the spring plate is pushed up.

The said fixing auxiliary tool consists of the U-shaped spring board which both legs contact | abut on the said stator iron core, and the pushing board inserted between this spring board and the said connection board, It is characterized by the above-mentioned. Rotating electric machine stator.

The fixing auxiliary tool includes a height adjusting shim that contacts the stator core, a spacer inserted between the shim and the connecting plate, and a bolt that prevents misalignment between the connecting plate, the spacer, and the shim. The rotating electrical machine stator according to claim 1, further comprising a pin.

2. The rotating electrical machine fixing according to claim 1, wherein the fixing auxiliary tool includes a pedestal contacting the stator core and a pair of tapered liners wedged between the pedestal and the connecting plate. Child.

In a rotating electric machine stator including a plurality of core bolts, a plurality of bore rings in which the core bolts are welded to the inner periphery, and a stator core made of a steel plate laminated along the core bolts, the bore rings are provided at a plurality of positions symmetrical with respect to the central axis. A rotating electrical machine stator, wherein a bolt seat is provided, and the bore ring is mechanically stretched against the stator core by a bolt screwed into the bolt seat.

In a rotating electric machine stator having a plurality of core bolts, a plurality of bores in which the core bolts are welded to the inner periphery, and a stator core made of a steel plate laminated along the core bolts, at a plurality of locations symmetrical with respect to the central axis of the bore ring A stator for a rotating electrical machine, wherein a pedestal is inserted between the stator core and the bore ring, and the bore ring is mechanically stretched against the stator core.