JPH0362289B2 - - Google Patents
Info
- Publication number
- JPH0362289B2 JPH0362289B2 JP20659985A JP20659985A JPH0362289B2 JP H0362289 B2 JPH0362289 B2 JP H0362289B2 JP 20659985 A JP20659985 A JP 20659985A JP 20659985 A JP20659985 A JP 20659985A JP H0362289 B2 JPH0362289 B2 JP H0362289B2
- Authority
- JP
- Japan
- Prior art keywords
- side plate
- tank
- insulating oil
- vibration
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Housings And Mounting Of Transformers (AREA)
- Regulation Of General Use Transformers (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、静止誘導機器に関するものであ
り、さらに詳しくいうと、油入りの変圧器やリア
クトルのような静止誘導機器に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to stationary induction equipment, and more specifically, to stationary induction equipment such as oil-filled transformers and reactors.
静止誘導機器、たとえば、リアクトルの振動、
騒音は、タンク内のリアクトル中身である鉄心に
生じる磁気吸引力による振動が、油を介して側板
あるいは側板に固着された補強材に伝達され発生
するのがほとんどである。そうして、側板および
補強材からなるタンク壁の共振周波数が、油を介
して伝達される電源周波数の２倍を基本波とする
高調波成分の励振周波数に一致した場合に、タン
ク壁の振動、騒音は著しく増大する。
Stationary induction equipment, e.g. reactor vibration,
Most of the noise is caused by vibrations caused by the magnetic attraction force generated in the iron core, which is the contents of the reactor inside the tank, which is transmitted via oil to the side plates or reinforcing materials fixed to the side plates. When the resonant frequency of the tank wall made up of the side plates and reinforcing material matches the excitation frequency of the harmonic component whose fundamental wave is twice the power frequency transmitted through the oil, the tank wall vibrates. , the noise increases significantly.
変圧器やリアクトルのタンクのように、絶縁油
に接している構造物の振動においは、絶縁油の付
加質量が大きな影響を及ぼす。 The added mass of the insulating oil has a large effect on the vibration odor of structures that are in contact with the insulating oil, such as transformers and reactor tanks.
タンク壁の振動解析を向上させるには、それを
正確に把持する必要があるが、これら弾性体の接
油運動における付加質量は、その振動モードによ
つて変化するので、問題はますます複雑となる。
そのため、共振対策として、変圧器およびリアク
トルの製作時に、タンクの振動を診断し、振動の
大きい箇所を中心に新たに補強材を追加する方法
がとられる場合がある。 To improve tank wall vibration analysis, it is necessary to grasp it accurately, but the problem becomes increasingly complex because the added mass of these elastic bodies in the oiled motion changes depending on their vibration mode. Become.
Therefore, as a countermeasure against resonance, a method is sometimes taken when manufacturing transformers and reactors to diagnose the vibration of the tank and add new reinforcing materials mainly to areas where the vibration is large.
第５図は従来の静止誘導機器を示し、図におい
て、タンク１は、側板２および側板２上に溶接に
よつて固着された複数個の補強材３からなつてい
る。タンク１の内部には、鉄心５と巻線６からな
る電器本体４が収納され、かつ、絶縁と冷却を目
的とした絶縁油７が充填されている。鉄心５で発
生した電磁振動は、絶縁油７を介して側板２に伝
達され、その結果、タンク１には曲げ振動が発生
する。このとき、曲げ振動が大きい場合には、側
板２上の振動の大きな箇所に、新たに補強材８を
溶接して固着させ、共振点を避けるようにしてい
る。 FIG. 5 shows a conventional stationary induction device, in which a tank 1 consists of a side plate 2 and a plurality of reinforcing members 3 fixed to the side plate 2 by welding. Inside the tank 1, an electric appliance body 4 consisting of an iron core 5 and a winding 6 is housed, and is filled with insulating oil 7 for the purpose of insulation and cooling. The electromagnetic vibration generated in the iron core 5 is transmitted to the side plate 2 via the insulating oil 7, and as a result, bending vibration occurs in the tank 1. At this time, if the bending vibration is large, a new reinforcing material 8 is welded and fixed to a location on the side plate 2 where the vibration is large to avoid a resonance point.
以上のような従来の静止誘導機器では、補強材
を設けたタンクの共振周波数は、不規則でかつ数
多く存在するため、１つの固有モードによる共振
振動を避けても別の固有モードによる共振振動が
増加する場合が多い。したがつて、１回の対策で
励振振動との共振を避けることは難かしい。ま
た、側板に補強材を溶接して固着させる際、その
熱による絶縁油の劣化およびタンク内面塗装の損
傷が発生するため、新たに補強材を溶接するたび
に絶縁油の脱気および塗装の補修を行う必要があ
る。このように変圧器やリアクトルの製作時に、
十分な振動、騒音低減対策を行うのに、多くの時
間と費用を要するという問題点があつた。
In conventional static induction equipment as described above, the resonant frequencies of the tank provided with the reinforcing material are irregular and numerous, so even if resonant vibration due to one eigenmode is avoided, resonant vibration due to another eigenmode may occur. often increases. Therefore, it is difficult to avoid resonance with the excitation vibration with a single measure. In addition, when welding and fixing reinforcing materials to the side panels, the heat causes deterioration of the insulating oil and damage to the tank's inner coating, so each time we weld a new reinforcing material, we must degas the insulating oil and repair the coating. need to be done. In this way, when manufacturing transformers and reactors,
The problem was that it took a lot of time and money to take sufficient measures to reduce vibration and noise.
この発明は、上記のような問題点を解決するた
めになされたもので、変圧器やリアクトルのタン
ク側板の振動低減対策を容易に行うことのできる
静止誘導機器を得ることを目的とする。 The present invention was made to solve the above-mentioned problems, and an object of the present invention is to obtain a stationary induction device that can easily take measures to reduce vibrations of tank side plates of transformers and reactors.
この発明に係る静止誘導機器は、電器本体を収
納する箱状のタンクの側板と電器本体間に絶縁油
中に、板状の挿入物が配設されている。
In the stationary induction device according to the present invention, a plate-shaped insert is disposed in insulating oil between the side plate of a box-shaped tank that houses an electric appliance body and the electric appliance body.
この発明においては、板状の挿入物がタンク側
板と電器本体間にある絶縁油の付加質量を変え、
タンク側板の共振振動数を変化させる。
In this invention, the plate-shaped insert changes the additional mass of the insulating oil between the tank side plate and the electrical appliance body,
Change the resonance frequency of the tank side plate.
第１図はこの発明の一実施例を示し、第１図に
おいて、静止誘導機器に用いられるタンク１の内
部には、鉄心５と巻線６からなる電器本体４が収
納され、かつ、絶縁と冷却を目的とした絶縁油７
が充填されている。絶縁油７の中には側板２に沿
うように、プレスボードのような板状の挿入物９
が数枚配設されている。
FIG. 1 shows an embodiment of the present invention. In FIG. 1, an electric appliance main body 4 consisting of an iron core 5 and a winding 6 is housed inside a tank 1 used for stationary induction equipment. Insulating oil for cooling purposes 7
is filled. A plate-shaped insert 9 such as a press board is inserted into the insulating oil 7 along the side plate 2.
Several sheets are placed.
次に作用について説明する。この静止誘導機器
のタンク１のように、絶縁油７に接している構造
物の振動においては、絶縁油７の付加質量が大き
な影響を及びし、その付加質量は、タンクの振動
モードによつて変化するので、解析は非常に複雑
となるが、第２図に示すような１自由度の単純な
モデルで上記実施例の作用を説明する。第２図に
おいて質点１０は質量ｍ、ばね定数ｋをもつタン
ク側板をあらわし、鉄心５はタンク側板に比べて
十分硬いと考え、質点１０と鉄心５は絶縁油７を
介してつながつている。 Next, the effect will be explained. The added mass of the insulating oil 7 has a large effect on the vibration of structures in contact with the insulating oil 7, such as the tank 1 of this stationary induction equipment, and the added mass depends on the vibration mode of the tank. Although the analysis becomes very complicated due to the change in the angle, the operation of the above embodiment will be explained using a simple model with one degree of freedom as shown in FIG. In FIG. 2, a mass point 10 represents a tank side plate having a mass m and a spring constant k, and the iron core 5 is considered to be sufficiently hard compared to the tank side plate, and the mass point 10 and the iron core 5 are connected via an insulating oil 7.
側板２の振幅をｘ、側板の振動によつて絶縁油
７に発生する圧力をＰとし、絶縁油７は側板２の
運動方向に対して垂直方向に動くと考えて、その
速度をｖ、鉄心５の長さをａ、油隙をｂ、油の流
路長さをｌ、側板２と鉄心５の対向面積をｓ、油
の密度をρ、時間をｔとする。 The amplitude of the side plate 2 is x, the pressure generated in the insulating oil 7 by the vibration of the side plate is P, assuming that the insulating oil 7 moves perpendicularly to the direction of movement of the side plate 2, its speed is v, and the iron core is 5 is the length a, the oil gap is b, the oil flow path length is l, the opposing area between the side plate 2 and the iron core 5 is s, the oil density is ρ, and the time is t.
側板を示す質点１０の運動方程式は次式で表わ
される。 The equation of motion of the mass point 10 representing the side plate is expressed by the following equation.
ｍd2x／dt2＋kx＋Ps＝０ ……(1)
油の運動方程式および連続の式は、それぞれ次
式で示される。 md 2 x/dt 2 +kx+Ps=0...(1) The equation of motion and continuity equation of oil are shown by the following equations, respectively.
Ｐ＝ρldv／dt ……(2)
∫ab・vdt＝sx ……(3)
式(3)より
dv／dt＝ｓ／ａ・ｂ d2x／dt2 ……(4)
式(1)、(2)、(4)より、側板を示す質点１０の運動
方程式は次式のようになる。 P=ρldv/dt...(2) ∫ab・vdt=sx...(3) From equation (3) dv/dt=s/a・b d 2 x/dt 2 ...(4) Equation (1) , (2) and (4), the equation of motion of the mass point 10 representing the side plate is as follows.
（ｍ＋ρl／ａ・ｂs2）d2x／dt2＋kx＝０ ……(5)
式(5)より付加質量mαは次式で示されることが
わかる。 (m+ρl/a·bs 2 )d 2 x/dt 2 +kx=0 (5) From equation (5), it can be seen that the additional mass mα is expressed by the following equation.
mα＝ρl／ａ・ｂs2 ……(6)
式(5)、(6)より、側板２の固有振動数（fn）は次
式で表わされる。 mα=ρl/a·bs 2 (6) From equations (5) and (6), the natural frequency (fn) of the side plate 2 is expressed by the following equation.
故に、タンク側板２と鉄心５の間の油隙ｂを変
えることにより付加質量mαの大きさが変化し、
その結果、側板２の固有振動数を変えることがで
きる。 Therefore, by changing the oil gap b between the tank side plate 2 and the iron core 5, the size of the additional mass mα changes,
As a result, the natural frequency of the side plate 2 can be changed.
第１図において、鉄心５で発生した電磁振動
は、絶縁油７を介して側板２に伝達され、その結
果、タンク１に曲げ振動が発生する。このとき、
側板２および、補強材３からなるタンク壁の固有
振動数が、電源周波数の２倍を基本波とする高調
波成分の励振周波数に一致すると、タンク壁の振
動、騒音は著しく増大する。このような場合、板
状の挿入物９を絶縁油７の中に配設することによ
り、油隙ｂを小さくすることができ、式(6)より付
加質量mαが大きくなり、式(7)により結果的に固
有振動数を下げることができる。 In FIG. 1, electromagnetic vibrations generated in the iron core 5 are transmitted to the side plate 2 via the insulating oil 7, and as a result, bending vibrations occur in the tank 1. At this time,
When the natural frequency of the tank wall made up of the side plate 2 and the reinforcing material 3 matches the excitation frequency of a harmonic component whose fundamental wave is twice the power supply frequency, the vibration and noise of the tank wall will increase significantly. In such a case, by arranging the plate-shaped insert 9 in the insulating oil 7, the oil gap b can be made smaller, and the additional mass mα becomes larger according to the formula (6), and the formula (7) As a result, the natural frequency can be lowered.
以上のようにして容易に側板２の固有振動数を
下げ、タンク側板の共振を避けることができる。 As described above, the natural frequency of the side plate 2 can be easily lowered and resonance of the tank side plate can be avoided.
なお、上記実施例においては、板状の挿入物９
を側板２に沿うように配設したが、第３図に示す
ように、鉄心５の側面に沿うように配設した場
合、あるいは、第４図に示すように、鉄心５と側
板２の中間に設けた場合も、上記実施例と同様の
効果を奏する。 In addition, in the above embodiment, the plate-shaped insert 9
is arranged along the side plate 2, but if it is arranged along the side surface of the iron core 5 as shown in FIG. 3, or as shown in FIG. Even when provided in the above example, the same effects as in the above embodiment can be obtained.
この発明は、以上の説明から明らかなように、
電器本体を収納する箱状のタンク側板と電器本体
の間の絶縁油中に、板状の挿入物を配設したこと
により、油隙を変化させ、付加質量を変えられる
ようにしたので、タンク側板の振動低減対策が容
易に、しかも、より経済的に行うことができる効
果がある。
As is clear from the above description, this invention
By placing a plate-shaped insert in the insulating oil between the box-shaped tank side plate that houses the electrical equipment and the electrical equipment, the oil gap can be changed and the added mass can be changed. This has the effect of making it easier and more economical to take measures to reduce the vibration of the side plates.
第１図はこの発明の一実施例の正断面図、第２
図は第１図のものの理論的な説明のための模式
図、第３図および第４図はそれぞれ他の実施例の
平面図、第５図は従来の静止誘導機器の正断面図
である。
１……タンク、２……側板、４……電器本体、
７……絶縁油、９……板状の挿入物。なお、各図
中、同一符号は同一又は相当部分を示す。
FIG. 1 is a front sectional view of one embodiment of the present invention, and FIG.
The drawings are a schematic diagram for theoretical explanation of the one shown in FIG. 1, FIGS. 3 and 4 are plan views of other embodiments, and FIG. 5 is a front sectional view of a conventional stationary guidance device. 1...Tank, 2...Side plate, 4...Electrical appliance body,
7...Insulating oil, 9...Plate-shaped insert. In each figure, the same reference numerals indicate the same or equivalent parts.
Claims (1)
タンクと、このタンクの側板と前記電器本体との
間の前記絶縁油中に配設された板状の挿入物とを
備えてなる静止誘導機器。 ２ 板状の挿入物がプレスボードである特許請求
の範囲第１項記載の静止誘導機器。[Scope of Claims] 1. A box-shaped tank filled with insulating oil and housing an electric appliance body, and a plate-shaped insert disposed in the insulating oil between a side plate of this tank and the electric appliance body. Stationary guidance equipment equipped with. 2. The stationary guidance device according to claim 1, wherein the plate-shaped insert is a pressboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20659985A JPS6267806A (en) | 1985-09-20 | 1985-09-20 | stationary induction equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20659985A JPS6267806A (en) | 1985-09-20 | 1985-09-20 | stationary induction equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6267806A JPS6267806A (en) | 1987-03-27 |
| JPH0362289B2 true JPH0362289B2 (en) | 1991-09-25 |
Family
ID=16526059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20659985A Granted JPS6267806A (en) | 1985-09-20 | 1985-09-20 | stationary induction equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6267806A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5444644B2 (en) * | 2008-06-20 | 2014-03-19 | 株式会社明電舎 | Stationary induction equipment |
-
1985
- 1985-09-20 JP JP20659985A patent/JPS6267806A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6267806A (en) | 1987-03-27 |
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