JPH0251096A - Rotary condition detector for internal pump - Google Patents
Rotary condition detector for internal pumpInfo
- Publication number
- JPH0251096A JPH0251096A JP63201332A JP20133288A JPH0251096A JP H0251096 A JPH0251096 A JP H0251096A JP 63201332 A JP63201332 A JP 63201332A JP 20133288 A JP20133288 A JP 20133288A JP H0251096 A JPH0251096 A JP H0251096A
- Authority
- JP
- Japan
- Prior art keywords
- rotating shaft
- internal pump
- eddy current
- displacement meter
- vibration
- 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.)
- Granted
Links
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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、沸騰水型原子炉（以下ＢＷＲと略称する）に
設けられているインターナルポンプの回転状態を検出す
る装置に関するものである。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is a device for detecting the rotational state of an internal pump provided in a boiling water nuclear reactor (hereinafter abbreviated as BWR). It is related to.
（従来の技術）
インターナルポンプを備えたＢＷＲは、一般に第４図に
示すような構成となっている。同図において１は原子炉
圧力容器であって、この原子炉圧力容器１内には炉心（
図示せず）を収容するシュラウド２が設けられ、シュラ
ウド２の上方には気水分離器３および蒸気乾燥器４が設
置されている。また、原子炉圧力容器１の底部を構成す
る鏡板５には制御棒駆動機構６およびインターナルポン
プ７が垂設されている。そして、インターナルポンプ７
は第５図に示すように鏡板５に設けられたノズル８にモ
ータ部９等を収納するケーシング１０の上端を嵌合させ
、ケーシング１０の上端をノズル８に溶接接合している
。なお、第５図において１１はモータ部９の回転シャフ
トを示し、この回転シャフト１１は原子炉圧力容器１内
のポンプ部１２と連結されている。また、１３はケーシ
ング１０の下端開口を塞ぐフランジである。(Prior Art) A BWR equipped with an internal pump generally has a configuration as shown in FIG. 4. In the figure, 1 is a reactor pressure vessel, and inside this reactor pressure vessel 1 is a reactor core (
A shroud 2 accommodating a steam generator (not shown) is provided, and above the shroud 2 a steam separator 3 and a steam dryer 4 are installed. Further, a control rod drive mechanism 6 and an internal pump 7 are vertically installed on a head plate 5 constituting the bottom of the reactor pressure vessel 1 . And internal pump 7
As shown in FIG. 5, the upper end of a casing 10 housing a motor section 9 and the like is fitted into a nozzle 8 provided on a mirror plate 5, and the upper end of the casing 10 is welded to the nozzle 8. In FIG. 5, reference numeral 11 indicates a rotating shaft of the motor section 9, and this rotating shaft 11 is connected to a pump section 12 inside the reactor pressure vessel 1. Moreover, 13 is a flange that closes the lower end opening of the casing 10.
ところで、このようなインターナルポンプ７はケーシン
グ１０内に発生した錆やゴミ等によって回転シャフト１
１を支持している軸受が損傷すると、回転シャフト１１
が振動しながら回転し、原子炉圧力容器１に好ましくな
い振動を与えることになる。ところが、従来ではインタ
ーナルポンプ７の回転シャフト１１の回転数を回転計で
計７Ｉｐ３ していたが、回転シャフト１１の振動まで
は検出していなかった。By the way, such an internal pump 7 has a rotary shaft 1 due to rust, dirt, etc. generated inside the casing 10.
If the bearing supporting the rotating shaft 11 is damaged, the rotating shaft 11
rotates while vibrating, giving undesirable vibrations to the reactor pressure vessel 1. However, in the past, although the rotational speed of the rotating shaft 11 of the internal pump 7 was measured by a tachometer at a total of 7 Ip3, the vibration of the rotating shaft 11 was not detected.
（発明が解決しようとする課題）
上述したように、従来においてはインターナルポンプ７
の回転シャフト１１の回転数を回転計で計測していたが
、回転シャフト１１の振動までは検出していなかったた
め、回転シャフト１１を支持している軸受の損傷等を検
知することができなかった。(Problem to be solved by the invention) As mentioned above, in the past, the internal pump 7
The rotation speed of the rotating shaft 11 was measured with a tachometer, but the vibration of the rotating shaft 11 was not detected, so damage to the bearing supporting the rotating shaft 11 could not be detected. .
本発明は上述した問題点に着目してなされたものであり
、その目的とするところはインターナルポンプの回転シ
ャフトの回転数と振動を同時に検出できるインターナル
ボブの回転状態検出装置を提供しようとするものである
。The present invention has been made in view of the above-mentioned problems, and its purpose is to provide an internal bob rotational state detection device that can simultaneously detect the rotational speed and vibration of the rotating shaft of an internal pump. It is something to do.
［発明の構成］
（課題を解決するための手段）
上記課題を解決するために本発明は、インターナルポン
プの回転シャフトに同芯状に取付けられた回転体と、こ
の回転体の外周面に一定間隔で同一円周上に設けられた
複数個の四部と、これら四部と対向する位置に一定距離
を隔てて設けられた渦電流式変位計と、この渦電流式変
位計の出力信号からパルス信号のみを抽出するパルス信
号抽出手段と、前記渦電流式変位計の出力信号から振動
波形のみを抽出する振動波形抽出手段とを具備したこと
を特徴とするものである。[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention includes a rotating body concentrically attached to the rotating shaft of an internal pump, and a rotating body attached to the outer peripheral surface of the rotating body. A plurality of four parts are provided on the same circumference at regular intervals, an eddy current displacement meter is provided at a certain distance opposite the four parts, and pulses are generated from the output signal of the eddy current displacement meter. The present invention is characterized by comprising a pulse signal extraction means for extracting only a signal, and a vibration waveform extraction means for extracting only a vibration waveform from the output signal of the eddy current displacement meter.
（作用）
本発明においては、渦電流式変位計から出力される信号
には回転シャフトの回転数成分と振動成分が含まれてい
るので、これらを夫々パルス信号抽出手段および振動波
形抽出手段で抽出することにより、インターナルポンプ
の回転シャフトの回転数と回転振動を同時に検出するこ
とができる。(Function) In the present invention, since the signal output from the eddy current displacement meter includes the rotational speed component and vibration component of the rotating shaft, these are extracted by the pulse signal extraction means and vibration waveform extraction means, respectively. By doing so, the rotational speed and rotational vibration of the rotating shaft of the internal pump can be detected simultaneously.
（実施例） 以下、本発明の一実施例を図面を参照して説明する。(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図は本発明によるインターナルポンプの回転状態検
出装置を示す構成図で、同図において１４は第２図に示
す如くインターナルポンプ７の回転シャフト１１の下端
部に同芯状に取付けられた回転体である。この回転体１
４の外周面には、複数個の凹部１５が同一円周上に一定
間隔で設けられている。そして、これら凹部１５と対向
する位置には渦電流式の変位計１６が一定距離を隔てて
前記フランジ１３に取付けられている。この渦電流式変
位計１６は第３図に示すように先端にセンサ部１７を有
し、このセンサ部１７で回転体１４の変位つまりセンサ
部１７と回転体１４との距離Ｈを電気的に測定するよう
になっている。そして、センサ部１７と回転体１４との
距離Ｈが一定値以上になると、オーバー電圧つまりパル
ス信号を発生するようになっている。FIG. 1 is a configuration diagram showing a rotational state detection device for an internal pump according to the present invention. In the same figure, reference numeral 14 is attached concentrically to the lower end of the rotating shaft 11 of the internal pump 7, as shown in FIG. It is a rotating body. This rotating body 1
4, a plurality of recesses 15 are provided on the same circumference at regular intervals. An eddy current type displacement meter 16 is attached to the flange 13 at a position facing these recesses 15 at a certain distance. As shown in FIG. 3, this eddy current type displacement meter 16 has a sensor section 17 at the tip, and this sensor section 17 measures the displacement of the rotating body 14, that is, the distance H between the sensor section 17 and the rotating body 14 electrically. It is designed to be measured. When the distance H between the sensor section 17 and the rotating body 14 exceeds a certain value, an overvoltage, that is, a pulse signal is generated.
また、第１図において１８は渦電流式変位計１６から出
力された信号を増幅する増幅器で、この増幅器１８で増
幅された渦電流式変位計１６の出力信号はパルスアンプ
１つおよび波形成形器２０に人力される。上記パルスア
ンプ１９は渦電流式変位計１６の出力信号からパルス信
号のみを抽出するためのもので、パルス信号を取り出す
ためのしきい値が予め設定されている。また、波形成形
器２０は渦電流式変位計１６の出力信号から振動波形の
みを抽出するためのもので、渦電流式変位計１６の出力
信号とパルスアンプ１９の出力信号とを同期して入力し
、渦電流式変位計１６の出力信号に含まれるパルス信号
を取り除くように構成されている。Further, in FIG. 1, 18 is an amplifier that amplifies the signal output from the eddy current displacement meter 16. 20 will be man-powered. The pulse amplifier 19 is for extracting only a pulse signal from the output signal of the eddy current displacement meter 16, and has a threshold value set in advance for extracting the pulse signal. Further, the waveform shaper 20 is for extracting only the vibration waveform from the output signal of the eddy current displacement meter 16, and inputs the output signal of the eddy current displacement meter 16 and the output signal of the pulse amplifier 19 in synchronization. However, it is configured to remove pulse signals included in the output signal of the eddy current displacement meter 16.
このような構成によると、インターナルポンプ７の回転
シャフト１１が一定速度で回転すると、回転シャフト１
１の下端部に取付けられた回転体１４が一体に回転する
。このとき、渦電流式変位計１６は回転体１４の外周面
に一定間隔で同一円周上に設けられた複数個の凹部１５
がセンサ部１７の前を通過する度にオーバー電圧すなわ
ちバルス信号を発生ずる。According to such a configuration, when the rotating shaft 11 of the internal pump 7 rotates at a constant speed, the rotating shaft 1
A rotating body 14 attached to the lower end of the rotating body 1 rotates together. At this time, the eddy current displacement meter 16 has a plurality of recesses 15 provided on the same circumference at regular intervals on the outer peripheral surface of the rotating body 14.
An overvoltage, that is, a pulse signal is generated each time the sensor passes in front of the sensor section 17.
また、インターナルポンプ７の回転シャフト１１が軸受
の損傷等により偏芯して回転すると、回転シャフト１１
の下端部に同芯状に取付けられた回転体１４も偏芯して
回転するため、渦電流式変位計１６からは第１図に示す
ような波形の信号Ａが出力される。したがって、この渦
電流式変位計１６から出力された信号Ａを増幅器１８を
介してそれぞれパルスアンプ１９および波形成形器２０
に人力することにより、パルスアンプ１つからは回転シ
ャフト１１の回転数を表わすパルス信号Ｂが出力され、
また波形成形器２０からは回転シャフト１１の振動を表
わす信号Ｃが出力されるので、インターナルポンプ７の
回転シャフト１１の回転数と振動を同時に検出すること
かできる。In addition, if the rotating shaft 11 of the internal pump 7 rotates eccentrically due to bearing damage, etc., the rotating shaft 11
Since the rotating body 14, which is concentrically attached to the lower end of the eddy current displacement meter 16, also rotates eccentrically, the eddy current displacement meter 16 outputs a signal A having a waveform as shown in FIG. Therefore, the signal A output from the eddy current displacement meter 16 is passed through the amplifier 18 to the pulse amplifier 19 and the waveform shaper 20, respectively.
By manually applying the power, one pulse amplifier outputs a pulse signal B representing the rotational speed of the rotating shaft 11.
Further, since the waveform shaper 20 outputs a signal C representing the vibration of the rotating shaft 11, the rotational speed and vibration of the rotating shaft 11 of the internal pump 7 can be detected simultaneously.
［発明の効果］
以上説明したように本発明によれば、インターナルポン
プの回転シャフトの回転数と振動を同時に検出できるの
で、回転シャフトを支持している軸受の損傷等を検知で
きる。したがって、回転シャフトの振動が大きくなる前
にインターナルポンプの運転を停止することができ、原
子炉の安全性を向上させることができる。[Effects of the Invention] As described above, according to the present invention, since the rotation speed and vibration of the rotating shaft of the internal pump can be detected simultaneously, damage to the bearing supporting the rotating shaft can be detected. Therefore, the operation of the internal pump can be stopped before the vibration of the rotating shaft becomes large, and the safety of the nuclear reactor can be improved.
第１図ないし第３図は本発明の一実施例を示す図で、第
１図は本発明によるインターナルポンプの回転状態検出
装置を示す構成図、第２図はインターナルポンプのケー
シング下部を示す断面図、第３図は回転体と渦電流式変
位計の位置関係を示す図、第４図はＢＷＲの構成を示す
断面図、第５図はインターナルポンプの構成を示す断面
図である。
１・・・原子炉圧力容器、２・・・シュラウド、３・・
・気水分離器、４・・・蒸気乾燥器、６・・・制御棒駆
動機構、７・・・インターナルポンプ、１１・・・回転
シャフト、１４・・・回転体、１５・・・凹部、１６・
・・渦電流式変位計、１８・・・増幅器、１９・・・パ
ルスアンプ、２０・・・波形成形器。
出願人代理人 弁理士 鈴江武彦
第２図
信号Ｂ
イ；号Ｃ
第１図
第３図
第
図
第
図1 to 3 are diagrams showing one embodiment of the present invention. FIG. 1 is a configuration diagram showing a rotation state detection device for an internal pump according to the present invention, and FIG. 2 shows a lower part of the casing of the internal pump. 3 is a sectional view showing the positional relationship between the rotating body and the eddy current displacement meter, FIG. 4 is a sectional view showing the configuration of the BWR, and FIG. 5 is a sectional view showing the configuration of the internal pump. . 1...Reactor pressure vessel, 2...Shroud, 3...
・Steam water separator, 4... Steam dryer, 6... Control rod drive mechanism, 7... Internal pump, 11... Rotating shaft, 14... Rotating body, 15... Recessed part , 16・
... Eddy current displacement meter, 18... Amplifier, 19... Pulse amplifier, 20... Waveform shaper. Applicant's representative Patent attorney Takehiko Suzue Figure 2 Signal B A; No. C Figure 1 Figure 3 Figure Figure
Claims (1)
れた回転体と、この回転体の外周面に一定間隔で同一円
周上に設けられた複数個の凹部と、これら凹部と対向す
る位置に一定距離を隔てて設けられた渦電流式変位計と
、この渦電流式変位計の出力信号からパルス信号のみを
抽出するパルス信号抽出手段と、前記渦電流式変位計の
出力信号から振動波形のみを抽出する振動波形抽出手段
とを具備したことを特徴とするインターナルポンプの回
転状態検出装置。A rotating body concentrically attached to the rotating shaft of the internal pump, a plurality of recesses provided on the same circumference at regular intervals on the outer circumferential surface of the rotating body, and a constant position facing the recesses. An eddy current displacement meter provided at a distance, a pulse signal extraction means for extracting only a pulse signal from the output signal of the eddy current displacement meter, and a pulse signal extraction means for extracting only a vibration waveform from the output signal of the eddy current displacement meter. 1. A rotation state detection device for an internal pump, comprising a vibration waveform extraction means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63201332A JPH07119825B2 (en) | 1988-08-12 | 1988-08-12 | Internal pump rotation status detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63201332A JPH07119825B2 (en) | 1988-08-12 | 1988-08-12 | Internal pump rotation status detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0251096A true JPH0251096A (en) | 1990-02-21 |
| JPH07119825B2 JPH07119825B2 (en) | 1995-12-20 |
Family
ID=16439261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63201332A Expired - Lifetime JPH07119825B2 (en) | 1988-08-12 | 1988-08-12 | Internal pump rotation status detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07119825B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0908899A2 (en) * | 1995-09-29 | 1999-04-14 | Kabushiki Kaisha Toshiba | Control rod drive mechanism |
| JP2021162498A (en) * | 2020-04-01 | 2021-10-11 | 東芝三菱電機産業システム株式会社 | Signal processing device of rotor electric runout measuring device, rotor electric runout measuring device, and rotor electric runout measuring method |
| JP2023101156A (en) * | 2022-01-07 | 2023-07-20 | 三菱重工マリンマシナリ株式会社 | Vibration monitoring device, supercharger, and vibration monitoring method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093995A (en) * | 1983-10-28 | 1985-05-25 | 株式会社日立製作所 | Shaft vibration monitoring system for reactor built-in recirculation pump |
-
1988
- 1988-08-12 JP JP63201332A patent/JPH07119825B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093995A (en) * | 1983-10-28 | 1985-05-25 | 株式会社日立製作所 | Shaft vibration monitoring system for reactor built-in recirculation pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0908899A2 (en) * | 1995-09-29 | 1999-04-14 | Kabushiki Kaisha Toshiba | Control rod drive mechanism |
| JP2021162498A (en) * | 2020-04-01 | 2021-10-11 | 東芝三菱電機産業システム株式会社 | Signal processing device of rotor electric runout measuring device, rotor electric runout measuring device, and rotor electric runout measuring method |
| JP2023101156A (en) * | 2022-01-07 | 2023-07-20 | 三菱重工マリンマシナリ株式会社 | Vibration monitoring device, supercharger, and vibration monitoring method |
| EP4443127A4 (en) * | 2022-01-07 | 2025-06-18 | Mitsubishi Heavy Industries Marine Machinery & Equipment Co., Ltd. | VIBRATION MONITORING DEVICE, COMPRESSOR AND VIBRATION MONITORING METHOD |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07119825B2 (en) | 1995-12-20 |
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