JPH0265641A - Structure at field winding lead-out section of turbine generator - Google Patents
Structure at field winding lead-out section of turbine generatorInfo
- Publication number
- JPH0265641A JPH0265641A JP63214989A JP21498988A JPH0265641A JP H0265641 A JPH0265641 A JP H0265641A JP 63214989 A JP63214989 A JP 63214989A JP 21498988 A JP21498988 A JP 21498988A JP H0265641 A JPH0265641 A JP H0265641A
- Authority
- JP
- Japan
- Prior art keywords
- wedge
- field winding
- lead
- spacer
- turbine generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004804 winding Methods 0.000 title claims abstract description 28
- 125000006850 spacer group Chemical group 0.000 claims abstract description 27
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 18
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Landscapes
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、タービン発電機の回転子に構成される界磁巻
線の口出部の構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure of an outlet of a field winding constructed in a rotor of a turbine generator.
従来から、タービン発電機の界磁巻線口出部構造は、種
々提案されており５例えば実開昭６１−８１７６８号公
報に記載されているような構造が、般的である。Conventionally, various structures for the field winding outlet of a turbine generator have been proposed, and for example, a structure as described in Japanese Utility Model Application Publication No. 81768/1983 is common.
そして、この種構造の口出部構造は、かならず回転子軸
に通称スロットと称する溝を掘って口出導体を埋込み、
その上で、ウェッジと称する飛び出し防止用具を前記ス
ロットに打込んで前記口出導体を固定している。In this type of outlet structure, grooves commonly called slots are always dug in the rotor shaft and the outlet conductors are embedded.
Then, a protrusion prevention tool called a wedge is driven into the slot to fix the lead conductor.
さらに、前記ウェッジは、スロットに打込む際そのスロ
ットの長さにもよるが、打込む時の作業性や、ウェッジ
の製造上の観点から、ある程度の長さのものを複数本使
用して、継足しながら打込むことが、おこなわれる。Furthermore, when driving the wedge into the slot, it depends on the length of the slot, but from the viewpoint of workability during driving and manufacturing of the wedge, a plurality of wedges of a certain length are used. Inputting is done in succession.
最後に、この種ウェッジが、スロット内のコイルによっ
て、受ける力（具体的には、軸の回転にともなう遠心力
）は、そのウェッジの端部での作用が最も注意を要する
もので、対策が十分でないと当該ウェッジにフレッティ
ング損傷を起したり、ひいては、疲労き裂が発生する恐
れがある。そのためその端部における遠心力の作用を緩
和する構造が、特開昭６０−１９８６５号公報に提案さ
れている。Finally, the force that this type of wedge is subjected to by the coil in the slot (specifically, the centrifugal force due to the rotation of the shaft) is the one that requires the most attention at the end of the wedge and cannot be countered. If it is not sufficient, fretting damage may occur in the wedge, and fatigue cracks may occur. Therefore, a structure for alleviating the action of centrifugal force at the ends has been proposed in Japanese Patent Laid-Open No. 19865/1986.
所で、タービン発電機の界磁巻線目出部、特に回転子軸
端に設けられる給電用スリップリング部から、軸中心を
通って導かれ、その後、周方向に導体を立ち上げて界磁
巻線端に至る、その立ち上がり部から界磁巻線端間の続
端部における口出線の押え込みは、前述の従来から提案
されている解決手段とは、異なった解決を計らねばなら
ない点があることが判明した。By the way, the field winding of the turbine generator is guided through the center of the shaft from the feeding slip ring provided at the end of the rotor shaft, and then the field winding is conducted by standing up a conductor in the circumferential direction. The holding down of the lead wire at the trailing end between the rising part and the end of the field winding, which leads to the end of the winding, requires a different solution from the previously proposed solutions mentioned above. It turns out that there is something.
この点を、第６図の従来構造の断面図を用いて説明する
。This point will be explained using the sectional view of the conventional structure shown in FIG.
回転軸１に設けられたスロット部１ａに、埋込まれる口
出線２は、その一端を軸中心を通って導かれた導体（図
示せず）と固着を兼ねたボルト３によって強固に固着さ
れている。この固着部は、ボルト３による締付けをする
関係上、その作業性と電気的な絶縁処置を施すことを考
慮して、スロット１ａの深さが決められている。一方、
口出線２の他端は、界磁巻Ｎ１Ａ（図示せず）の端部ま
で導かれるが、その時１口出線２は、界磁巻線端部の位
置の関係と、さらに作業性を考慮して、前述の固着部よ
りも浅いスロット部１ｂを通る様になっている。この構
造上、口出線２は、その途中で折り曲げられた１曲部２
ａを持つことになる。The lead wire 2 embedded in the slot portion 1a provided in the rotating shaft 1 is firmly fixed at one end by a conductor (not shown) guided through the center of the shaft and a bolt 3 which also serves as a fixing member. ing. The depth of the slot 1a in this fixed portion is determined in consideration of workability and electrical insulation since it is to be tightened with the bolt 3. on the other hand,
The other end of the lead wire 2 is guided to the end of the field winding N1A (not shown), but at this time, the first lead wire 2 is Taking this into account, it passes through the slot portion 1b which is shallower than the aforementioned fixed portion. Due to this structure, the lead wire 2 has a single curved portion 2 that is bent in the middle.
We will have a.
２ｂは、他方の接続曲部である。４は、ボルトの頭部と
、ウェッジ５間の空隙を埋める絶縁性の箱形スペーサで
あり、６は１口出線２の曲部２ａと、ウェッジ７間にで
きる三角形の空隙に埋められる三角スペーサである。８
は、前述のウェッジ７より界磁巻線側に先に打込まれる
ウェッジである。９は、そのウェッジ８と口出線２間に
挿入されるスペーサである。2b is the other connecting bend. 4 is an insulating box-shaped spacer that fills the gap between the head of the bolt and the wedge 5, and 6 is a triangular spacer that is filled in the triangular gap created between the curved part 2a of the single exit wire 2 and the wedge 7. It is a spacer. 8
is a wedge that is driven into the field winding side earlier than the wedge 7 described above. 9 is a spacer inserted between the wedge 8 and the lead wire 2.
この種従来の口出部構造は、その部分における作業性を
考慮した結果、口出線２の一端を固着するボルト３を締
付けるための作業空隙を最大限に確保するため、スロッ
トの表面に打込まれるウェッジ８，７．５の長さを、適
当な長さに分割している。所が、この結果三角スペーサ
６を押えるウェッジ７は、その三角スペーサ６のボルト
３側の面６ａにほぼ一致する所で１次に打込まれるウェ
ッジ５と端面を合せるように構成されていた。In this type of conventional outlet structure, in consideration of workability in that part, in order to maximize the working space for tightening the bolt 3 that fixes one end of the outlet wire 2, the surface of the slot is hammered. The length of the wedges 8, 7.5 to be inserted is divided into appropriate lengths. However, as a result, the wedge 7 that presses down the triangular spacer 6 is configured such that its end face is aligned with the wedge 5 that is driven first at a location that substantially coincides with the surface 6a of the triangular spacer 6 on the bolt 3 side.
この種従来の構造は１作業性の点では非常に有効なもの
であった。This type of conventional structure has been very effective in terms of workability.
しかしながら、この種構造はウェッジに対する面応力の
作用を、分担する機能を満足できない部分があることが
判明した。However, it has been found that this type of structure cannot satisfy the function of sharing the action of surface stress on the wedge in some parts.
その原因は、口出線２の熱膨張にともなう応力を考慮し
ていない点に起因しているものと考えられる。すなわち
、同図Ｐ視部で示した所に、ウェッジ、又はスペーサで
まったく押えられていない口出線部が存在し口出線ｉＡ
２に流れる電流によって熱せられた導体が熱膨張を起す
と、この部分で。The reason for this is thought to be that stress due to thermal expansion of the lead wire 2 was not taken into consideration. In other words, there is a lead line part that is not held down by the wedge or spacer at all in the area shown in the P view in the figure, and the lead line iA is
When the conductor heated by the current flowing through 2 undergoes thermal expansion, this part.
押えられていない側に膨張するため、三角スペーサ６が
ウェッジ側７に押上げられる形になる。このため、三角
ウェッジ６の側面６ａと位置を合せて、打込まれている
ウェッジ７は、その端部で大きな集中応力を受ける事に
なってしまう。Since it expands toward the unpressed side, the triangular spacer 6 is pushed up toward the wedge side 7. For this reason, the wedge 7 that is driven in alignment with the side surface 6a of the triangular wedge 6 ends up receiving a large concentrated stress at its end.
本発明は、この種口出線２の熱膨張にともなう応力にも
十分耐え得るタービン発電機の界磁巻線口出部構造を提
供することを目的としている。An object of the present invention is to provide a field winding outlet structure for a turbine generator that can sufficiently withstand stress caused by thermal expansion of the seed lead wire 2.
本発明は、上述の口出線の熱膨張による応力がウェッジ
端部に掛かるのを防ぐため、ウェッジの分割長さを調整
し、先に打込まれたウェッジとその後に打込まれるウェ
ッジの端部が、三角スペーサの側端面でウェッジと直角
に接する角部から、２０ＩＩｎ以上、５０ＩＩｆｉ以下
の位置において、合わせられるようにした。In order to prevent stress due to the thermal expansion of the lead wire from being applied to the edge of the wedge, the present invention adjusts the length of the wedge division, and separates the edge of the wedge driven first and the edge of the wedge driven afterwards. The portions are aligned at a position of 20 IIn or more and 50 II fi or less from the corner that is in contact with the wedge at right angles on the side end surface of the triangular spacer.
さらに他の解決手段として、三角スペーサの側面で、ウ
ェッジと直角に接する角部に切欠きを形成して三角スペ
ーサの側面６ａと、ウェッジ端部が、一致しないように
した。As yet another solution, a notch is formed on the side surface of the triangular spacer at a corner that is in contact with the wedge at right angles so that the side surface 6a of the triangular spacer and the edge of the wedge do not coincide.
上述の構成を採用することにより、口出線の熱膨張にと
もなう応力を、ウェッジの長さ方向の中間部で受けるこ
とができるもので、従来、端部で応力を受ける時は、い
わば片持梁であった構造が両持梁の構造になるもので、
その耐応力性能が大幅に向上するものである。By adopting the above-mentioned configuration, the stress caused by the thermal expansion of the lead wire can be received at the middle part of the wedge in the longitudinal direction. The structure that used to be a beam becomes a double-supported beam structure,
Its stress resistance performance is greatly improved.
以下図面に従って本発明の具体的な口出部構造を説明す
る。なお、図中、符号の同一のものは従来の構造と同じ
ものを表わしているので、改めて説明を加えることは省
略する。The specific outlet structure of the present invention will be described below with reference to the drawings. Note that in the drawings, the same reference numerals represent the same structures as in the conventional structure, so further explanation will be omitted.
第１図は、三角スペーサ６の側面６ａがウェッジと接す
る位置を１ロ呂線固着用ボルト３を押えるウェッジ５の
端部から、約３０冊内方に来るように、その前に打込む
ウェッジ７の長さを決定したものである。第２図は、第
１図のＡ−Ａ断面視図であり、第３図は、第１図のＢ−
８断面視図である。この種構成による口出部構造は、第
４図に示す如く、応力が作用する。Fig. 1 shows a wedge that is driven in front of the triangular spacer 6 so that the position where the side surface 6a contacts the wedge is approximately 30 volumes inward from the end of the wedge 5 that presses the wire fixing bolt 3. 7 was determined. FIG. 2 is a sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line B-- in FIG.
FIG. 8 is a cross-sectional view. As shown in FIG. 4, stress acts on the outlet structure of this type of structure.
すなわち、口出線２の熱膨張による伸び応力は、当該口
出線の固着されている側からは、Ｓ方向に作用し、界磁
巻線端側の熱膨張による伸び応力は、Ｆ方向に作用する
。そうすると、口出線２は、スペーサによって押えられ
ていない部分に応力を逃がそうとするので、その方向は
矢印Ｐとなって現われる。That is, the elongation stress due to thermal expansion of the lead wire 2 acts in the S direction from the side where the lead wire is fixed, and the elongation stress due to thermal expansion on the end side of the field winding acts in the F direction. act. Then, the lead line 2 tries to release the stress to the part not held down by the spacer, so the direction appears as an arrow P.
この結果、口出線２は、曲部２ａで外方に脹らみその分
が、三角スペーサ６を経由して、ウェッジ５にＰ′とし
て伝達される。しかしながらウェッジ５は、その端面５
ａが、三角スペーサの奥行き方向に重なる形で途中まで
長くなっており、前述の応力Ｐ′は、ちょうど両持梁の
ほぼ中間に作用するようになるものである。As a result, the lead wire 2 swells outward at the curved portion 2a, and that amount is transmitted to the wedge 5 as P' via the triangular spacer 6. However, the wedge 5 has its end face 5
a is overlapped in the depth direction of the triangular spacer and is elongated to the middle, so that the stress P' mentioned above acts exactly at approximately the middle of the supported beams.
この結果、従来の片持梁に応力が掛かる形の構造に比べ
て数段の耐応力性を発揮することが出来るようになる。As a result, it is possible to exhibit several levels of stress resistance compared to conventional structures in which stress is applied to cantilever beams.
第５図は１本発明の他の実施例で、前述の第４図の説明
からも明らかなように、ウェッジに加わる応力Ｐ′ を
、当該ウェッジのほぼ中間に作用させる様にするため、
三角スペーサ６の側面６ａが、ウェッジ７と直角に接す
る角部６ｂを切落したものである。FIG. 5 shows another embodiment of the present invention, and as is clear from the explanation of FIG.
A side surface 6a of the triangular spacer 6 is obtained by cutting off a corner portion 6b that is in contact with the wedge 7 at a right angle.
この切落す寸法は、既に説明したように、ウェッジ７の
端部７ａから２０ｍｍ〜ＬＯＯｍｍの範囲までスキ間が
出来るようにすることでおこなわれることは云うまでも
ない。It goes without saying that the size of the cut is such that there is a gap in the range of 20 mm to LOOmm from the end 7a of the wedge 7, as described above.
この部構造にすると、従来から検討され、作業性等を考
慮すると最も効果的である三角スペーサ６の側面６ａと
、ウェッジ８の次にスロットに打込まれるウェッジ７の
端面がほぼ一致していても、当該端面に応力Ｐが掛かる
事がなくなるものである。With this structure, the side surface 6a of the triangular spacer 6, which has been considered and is most effective in terms of workability and the like, almost coincides with the end surface of the wedge 7, which is driven into the slot next to the wedge 8. Also, stress P is not applied to the end face.
以上説明した本発明によるタービン発電機の口出部構造
によれば、従来もっばら回転による遠心力の作用のみを
考慮していたものに対して、口出線に流れる電流によっ
て１発生する熱が口出線の熱膨張を生じ、その応力の集
中がある点を解明して、簡単な構造上の改善で、効果を
数段高めることができたもので、今後、益々大容量化、
長時間連続運転、急峻な過負荷運転等の条件を克服する
要請が高まる可能性のあるタービン発電機において、必
要不可欠な構造になるものである。According to the outlet structure of the turbine generator according to the present invention described above, the heat generated by the current flowing through the outlet wire is By elucidating the point where the thermal expansion of the lead wire occurs and the concentration of stress, we were able to improve the effect several times with simple structural improvements.In the future, we will continue to increase capacity and
This is an essential structure for turbine generators, which are likely to be required to overcome conditions such as long-term continuous operation and steep overload operation.
第１図は、本発明によるタービン発電機の界磁巻線口出
部を軸線に沿って断面した図、第２図は第１図のＡ −
Ａ線に沿った断面図、第３図は第１図のＢ −Ｂ線に沿
った断面図である。
第・１図は、タービン発電機の界磁巻線目出部の熱伸び
による応力分布を図式化した図である。
第５図は１本発明の他の実施例を示した断面図である。
第６図は、従来の同一部を示した断面図である。
１・・・回転軸、２・・・口出線、２ａ・・・曲部、３
・・・ボルト、４・・・箱形スペーサ、５，７．８・・
・ウェッジ、６・・・三角スペーサ、６ａ・・・三角ス
ペーサの側面。
第４日
も
図
第２図
帛３図
塔６日FIG. 1 is a cross-sectional view of the field winding outlet of a turbine generator according to the present invention taken along the axis, and FIG.
3 is a cross-sectional view taken along line A, and FIG. 3 is a cross-sectional view taken along line B--B in FIG. 1. FIG. 1 is a diagram illustrating the stress distribution due to thermal elongation of the field winding eye of a turbine generator. FIG. 5 is a sectional view showing another embodiment of the present invention. FIG. 6 is a sectional view showing the same part of the conventional device. 1...Rotation axis, 2...Lead line, 2a...Curved part, 3
... Bolt, 4... Box spacer, 5, 7.8...
- Wedge, 6...triangular spacer, 6a...side of the triangular spacer. 4th day also figure 2 figure 3 figure tower 6th day
Claims (1)
の端部とスリップリングを電気的に接続する界磁巻線口
出部を有するものにおいて、口出線（２）を押さえるウ
ェッジの長さを調整し、先に打ち込まれたウェッジ（７
）と、その後に打ち込まれるウェッジ（５）の端部が、
前記口出線（２）とウェッジの間に挿入される三角スペ
ーサ（６）の側端面（６ａ）のウェッジ（５）と直角に
接する角部から、２０ｍｍ以上５０ｍｍ以下の位置にお
いて当接するように構成されたことを特徴とするタービ
ン発電機の界磁巻線口出部構造。２、界磁巻線を有する
回転子の軸端部で、当該界磁巻線の端部とスリップリン
グを電気的に接続する界磁巻線口出部を有するものにお
いて、三角スペーサ（６）の側端面（６ａ）で、かつウ
ェッジ（７）と直角に接する角部が角落し（６ｂ）され
ているタービン発電機の界磁巻線口出部構造。 ３、界磁巻線を有する回転子の軸端部で、当該界磁巻線
の端部とスリップリングを電気的に接続する界磁巻線口
出部を有するものにおいて、口出線の曲部で、当該口出
線とウェッジの間に挿入される三角スペーサの前記ウェ
ッジと接する面に直角な側面が当該ウェッジの端部から
２０ｍｍ以上５０ｍｍ以下の位置で当接するようにし、
前記三角スペーサの側面に沿つて生ずる口出線の熱膨張
による応力が、前記ウェッジとの当接面に両持ち梁の原
理で加わるように構成されているタービン発電機の界磁
巻線口出部構造。[Claims] 1. A shaft end of a rotor having a field winding, which has a field winding outlet that electrically connects the end of the field winding to a slip ring. , adjust the length of the wedge that holds the lead wire (2), and press the wedge that was driven in earlier (7
) and the end of the wedge (5) that is driven after that.
The triangular spacer (6) inserted between the lead wire (2) and the wedge is brought into contact at a position of 20 mm or more and 50 mm or less from the corner of the side end surface (6a) that is in contact with the wedge (5) at right angles. A field winding outlet structure of a turbine generator, characterized in that: 2. A triangular spacer (6) at the shaft end of a rotor having a field winding, which has a field winding outlet that electrically connects the end of the field winding to the slip ring. A field winding outlet structure of a turbine generator, in which a corner portion that is in contact with a wedge (7) at a right angle is cut off (6b) on a side end face (6a) of the turbine generator. 3. At the shaft end of a rotor having a field winding, which has a field winding outlet that electrically connects the end of the field winding and a slip ring, the curve of the lead wire At the part, the side surface of the triangular spacer inserted between the lead line and the wedge, which is perpendicular to the surface that contacts the wedge, contacts the edge of the wedge at a position of 20 mm or more and 50 mm or less,
A field winding exit of a turbine generator is configured such that stress due to thermal expansion of the exit wire generated along the side surface of the triangular spacer is applied to the contact surface with the wedge on the principle of a double-end supported beam. Department structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63214989A JPH0265641A (en) | 1988-08-31 | 1988-08-31 | Structure at field winding lead-out section of turbine generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63214989A JPH0265641A (en) | 1988-08-31 | 1988-08-31 | Structure at field winding lead-out section of turbine generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0265641A true JPH0265641A (en) | 1990-03-06 |
Family
ID=16664858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63214989A Pending JPH0265641A (en) | 1988-08-31 | 1988-08-31 | Structure at field winding lead-out section of turbine generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0265641A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06305420A (en) * | 1993-04-22 | 1994-11-01 | Nabco Ltd | Plug door device |
| JP2004207578A (en) * | 2002-12-26 | 2004-07-22 | Hitachi Metals Ltd | Working method of molding |
| EP1760864A1 (en) * | 2005-09-05 | 2007-03-07 | ABB Oy | Rotor of an electrical machine |
-
1988
- 1988-08-31 JP JP63214989A patent/JPH0265641A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06305420A (en) * | 1993-04-22 | 1994-11-01 | Nabco Ltd | Plug door device |
| JP2004207578A (en) * | 2002-12-26 | 2004-07-22 | Hitachi Metals Ltd | Working method of molding |
| EP1760864A1 (en) * | 2005-09-05 | 2007-03-07 | ABB Oy | Rotor of an electrical machine |
| US7626310B2 (en) | 2005-09-05 | 2009-12-01 | Abb Oy | Rotor of an electrical machine |
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