JPH0439635B2 - - Google Patents
Info
- Publication number
- JPH0439635B2 JPH0439635B2 JP58203256A JP20325683A JPH0439635B2 JP H0439635 B2 JPH0439635 B2 JP H0439635B2 JP 58203256 A JP58203256 A JP 58203256A JP 20325683 A JP20325683 A JP 20325683A JP H0439635 B2 JPH0439635 B2 JP H0439635B2
- Authority
- JP
- Japan
- Prior art keywords
- pump
- shaft
- vibration
- pump shaft
- displacement meter
- 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
Links
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は原子炉内蔵型再循環ポンプの軸振動監
視システムに係り、特にポンプ軸の回転数を検出
する非接触型変位計の出力を用いてポンプ軸の振
動を検出するのに好適な軸振動監視システムに関
するものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a shaft vibration monitoring system for a recirculation pump built into a nuclear reactor, and particularly to a system for monitoring shaft vibration of a recirculation pump built into a nuclear reactor, and in particular, a vibration monitoring system that uses the output of a non-contact displacement meter to detect the rotation speed of the pump shaft. The present invention relates to a shaft vibration monitoring system suitable for detecting vibrations of a pump shaft.
原子炉内蔵型再循環ポンプは、一般にポンプ軸
がポンプケーシング外部へ露出していないため、
ポンプ軸の振動を計測する場合には、ポンプケー
シング内に特別の振動検出器を設置することが考
えられる。しかし、この場合には、ポンプケーシ
ングに検出器出力取出し用の貫通孔を開けなけれ
ばならない。
Recirculation pumps built into the reactor generally have pump shafts that are not exposed to the outside of the pump casing.
When measuring vibrations of the pump shaft, it is conceivable to install a special vibration detector inside the pump casing. However, in this case, it is necessary to make a through hole in the pump casing for extracting the output of the detector.
ところで、原子炉内蔵型再循環ポンプは、第１
図に示すように、原子炉圧力容器１の底部に設置
され、ポンプインペラー２、ポンプデイフユーザ
３、ポンプケーシング４、モータ巻線５、端子ポ
ツクス６、上部ジヤーナル軸受７、ポンプ軸８、
下部ジヤーナル軸受９より構成されるが、原子炉
圧力容器１内の冷却水の流出事故を想定した場
合、ポンプケーシング４に設ける貫通孔が冷却水
流出ポテンシやルとなり得るので、ケーシング４
に設ける貫通孔はできるだけ少ない方がよい。ま
た、万一、ポンプケーシング４の貫通孔より冷却
水が流出した場合、上部の原子炉圧力容器１内よ
り高温水がポンプケーシング４内に侵入し、モー
タ巻線５の絶縁材を溶融し、絶縁損傷の事故への
発展する恐れもある。したがつて、ポンプケーシ
ング４内に配置する検出器は、最低限必要不可欠
であるポンプ軸８を回転検出器のみとするのが好
ましい。 By the way, the reactor built-in recirculation pump is
As shown in the figure, the pump impeller 2, pump differential user 3, pump casing 4, motor winding 5, terminal box 6, upper journal bearing 7, pump shaft 8,
The pump casing 4 is composed of a lower journal bearing 9, but in the case of an accident where cooling water leaks out of the reactor pressure vessel 1, the through holes provided in the pump casing 4 can serve as a potential for cooling water to flow out.
It is better to have as few through holes as possible. In addition, in the event that cooling water leaks from the through hole of the pump casing 4, high-temperature water will enter the pump casing 4 from the upper reactor pressure vessel 1 and melt the insulating material of the motor winding 5. There is also the risk of developing an accident due to insulation damage. Therefore, it is preferable that the only detector disposed inside the pump casing 4 is a rotation detector for the pump shaft 8, which is at least essential.
そこで、従来、ポンプ軸８の振動の監視は、直
接ポンプ軸８を監視することによらず、ポンプケ
ーシング４の下部の外側に加速度計を設置し、こ
の加速度計によつてポンプケーシング４の振動を
監視して、ポンプケーシング４の内部のポンプ軸
８の振動現象を推察するようにしていた。しか
し、この方法では、ポンプケーシング４の振動し
か検出することができず、ポンプ軸８の振動によ
つて引き起こされる２次的な現象しか捉えること
ができない。したがつて、ポンプ軸８がポンプ運
転中に起こしている詳細な振動現像を計測するこ
とは困難である。なお、現実的には、ポンプケー
シング４の振動を抑えるために、ポンプケーシン
グ４の外部に防振サポートが取り付けてあり、ポ
ンプ軸８の振動が多少大きくなつても、防振サポ
ートによつてポンプケーシング４の振動が抑え込
まれるので、ポンプケーシング４の振動の監視の
みでは、ポンプ運転に必要な情報を十分に得るこ
とは不可能である。 Therefore, conventionally, the vibration of the pump shaft 8 has been monitored by not directly monitoring the pump shaft 8, but by installing an accelerometer outside the lower part of the pump casing 4. was monitored to infer vibration phenomena of the pump shaft 8 inside the pump casing 4. However, with this method, only the vibrations of the pump casing 4 can be detected, and only secondary phenomena caused by the vibrations of the pump shaft 8 can be captured. Therefore, it is difficult to measure the detailed vibration development caused by the pump shaft 8 during pump operation. In reality, in order to suppress the vibration of the pump casing 4, a vibration isolating support is attached to the outside of the pump casing 4, and even if the vibration of the pump shaft 8 becomes somewhat large, the vibration isolating support will prevent the pump from moving. Since the vibration of the casing 4 is suppressed, it is impossible to obtain sufficient information necessary for pump operation only by monitoring the vibration of the pump casing 4.
本発明は上記に鑑みてなされたもので、その目
的とするところは、ポンプケーシング内にはポン
プ軸の回転数を検出する非接触型変位計を取り付
けるだけでポンプ軸の振動をも監視することがで
きる原子炉内蔵型再循環ポンプの軸振動監視シス
テムを提供することにある。
The present invention has been made in view of the above, and its purpose is to monitor the vibration of the pump shaft by simply installing a non-contact displacement meter inside the pump casing to detect the rotation speed of the pump shaft. The purpose of the present invention is to provide a shaft vibration monitoring system for a recirculation pump built into a nuclear reactor.
本発明の特徴は、原子炉内蔵型再循環ポンプの
ポンプ軸の下端の取付部材に設けた切欠きを検出
するポンプケーシング内下端に取り付けた非接触
型変位計と、この変位計で検出された上記ポンプ
軸の回転にともなう上記切欠きの通路回数と上記
ポンプ軸の振動とに対応した電気信号を入力して
上記切欠きの通過回数に応じた回転パルス信号と
上記ポンプ軸の振動に応じた軸振動波形信号とに
分離する信号分離手段と、上記軸振動波形信号を
入力して上記ポンプ軸の振動の周波数分析を行う
周波数分析手段と、上記回転パルス信号と上記周
波数分析手段の出力とを入力して上記ポンプ軸を
回転数と振動とを表示する表示手段とよりなる構
成とした点にある。
The present invention is characterized by a non-contact displacement meter attached to the lower end of the pump casing that detects the notch provided in the attachment member at the lower end of the pump shaft of the reactor built-in recirculation pump; An electric signal corresponding to the number of passages of the notch and the vibration of the pump shaft as the pump shaft rotates is input, and a rotation pulse signal corresponding to the number of passages of the notch and the vibration of the pump shaft are input. a signal separating means for separating the shaft vibration waveform signal into the shaft vibration waveform signal; a frequency analysis means for inputting the shaft vibration waveform signal to perform frequency analysis of the vibration of the pump shaft; and a signal separation means for separating the rotation pulse signal and the output of the frequency analysis means. The present invention is comprised of a display means for displaying the rotational speed and vibration of the pump shaft upon input.
以下本発明を第２図〜第５図に示した実施例お
よび第６図、第７図を用いて詳細に説明する。
The present invention will be described in detail below with reference to the embodiments shown in FIGS. 2 to 5 and FIGS. 6 and 7.
第２図は本発明に係る軸振動監視システムを備
えた原子炉内蔵型再循環ポンプの一実施例を示す
構造説明図で、第１図と同一部分は同じ符号で示
し、ここでは説明を省略する。 Fig. 2 is a structural explanatory diagram showing an embodiment of a recirculation pump built into a nuclear reactor equipped with a shaft vibration monitoring system according to the present invention. The same parts as in Fig. 1 are denoted by the same symbols, and the explanation is omitted here. do.
第３図は第２図のＡ部詳細図で、図に示すよう
に、原子炉内蔵型再循環ポンプのポンプ軸８の下
端に取り付けてある周囲にポンプ軸８の回転数を
計測するための切欠き１０を設けてある逆転防止
器１１の切欠き１０に対向するように、ポンプケ
ーシング４の内部下端に非接触変位計１２を取り
付けてある。非接触変位計１２は、回転体に接触
せずに回転体と非接触変位計１２との相対変化を
うず電流の変化としてとらえ、回転体の回転数を
測定するものであり、そのため、逆転防止器１１
には切欠き１０を設けて、ポンプ軸８の回転にと
もない上記両者間に相対変化が生じるようにして
ある。ところで、非接触変位計１２からの出力で
ある電気信号は、ポンプ軸８の回転のみならずポ
ンプ軸８の振動によつても変化する。ポンプ軸８
の振動を測定する場合、ポンプ軸８は、第２図に
示すように上下２個所のジヤーナル軸受７，９に
よつて支持されているので、ポンプ軸８の振動の
最も顕著に現れる位置は、ポンプ軸８の上、下両
端であるので、本実施例では、ポンプ軸８下端の
逆転防止器１１に対向する位置に非接触変位計１
２を取り付けるよ取にして、感度の増大をはかつ
た。 Fig. 3 is a detailed view of part A in Fig. 2. As shown in the figure, a device for measuring the rotation speed of the pump shaft 8 is attached to the lower end of the pump shaft 8 of the reactor built-in recirculation pump. A non-contact displacement meter 12 is attached to the inner lower end of the pump casing 4 so as to face the notch 10 of the reverse rotation preventer 11 provided with the notch 10 . The non-contact displacement meter 12 measures the rotational speed of the rotating body by capturing the relative change between the rotating body and the non-contact displacement meter 12 as a change in eddy current without contacting the rotating body, and therefore prevents reverse rotation. Vessel 11
A notch 10 is provided in so that a relative change occurs between the two as the pump shaft 8 rotates. By the way, the electrical signal output from the non-contact displacement meter 12 changes not only due to the rotation of the pump shaft 8 but also due to the vibration of the pump shaft 8. pump shaft 8
When measuring the vibration of the pump shaft 8, since the pump shaft 8 is supported by two upper and lower journal bearings 7 and 9 as shown in FIG. Since the upper and lower ends of the pump shaft 8 are both ends, in this embodiment, a non-contact displacement meter 1 is installed at a position facing the reverse rotation preventer 11 at the lower end of the pump shaft 8.
2 was installed to increase sensitivity.
第４図は第３図の非接触変位計１２の取付部の
一実施例を示す断面図で、非接触変位計１２は、
ポンプケーシング４の下部に気密に固定したブツ
シユ１３の先端にガスケツト１４を介して取り付
け、非接触変位計１２からのリード線１５は、ブ
ツシユ１３内を通してコネクタ１６を介して外部
へ取り出すようにした。 FIG. 4 is a sectional view showing an embodiment of the mounting part of the non-contact displacement meter 12 shown in FIG.
It is attached via a gasket 14 to the tip of a bush 13 airtightly fixed to the lower part of the pump casing 4, and a lead wire 15 from the non-contact displacement gauge 12 is passed through the bush 13 and taken out to the outside via a connector 16.
第５図は本発明の軸振動監視システムの一実施
例を示すブロツク図である。ポンプ軸８が何らか
の原因によつて振動した場合、逆転防止器１１も
ポンプ軸８と同様に振動するので、非接触変位計
１２からは、第６図に示すような、ポンプ軸８の
回転数に対応した回転パルス信号１７にポンプ軸
８の振動に応じた軸振動波形信号１８が重畳した
電気信号Ｓが出力される。この電気信号Ｓは、Ｆ
−Ｖコンバータ２０に入力させ、回転パルス信号
１７の周波数のみに比例した電圧に変換し、この
電圧によつてモニター２１にポンプ軸８の回転数
を表示する。一方、電気信号Ｓはフイルタ２２に
も入力させ、フイルタ２２で電気信号Ｓの中の回
転パルス信号１７を除去して第７図に示す軸振動
波形信号１８のみを取り出す。この軸振動波形信
号１８は周波数分析装置２３へ入力させ、ポンプ
軸８の振動の周波数分析、すなわち、振幅値およ
び移動周波数を求め、その結果をモニター２１に
表示する。ここに、周波数分析装置２３としてパ
ーソナルコンピユータを用いるようにすれば、計
測時間の短縮をはかることができ、また、ポンプ
軸８の振動状態に応じて警報を発生させたり、再
循環ポンプの自動停止等のインターロツク信号を
出すようにすることができる。 FIG. 5 is a block diagram showing an embodiment of the shaft vibration monitoring system of the present invention. When the pump shaft 8 vibrates for some reason, the reverse preventer 11 also vibrates in the same way as the pump shaft 8, so the non-contact displacement meter 12 detects the rotational speed of the pump shaft 8 as shown in FIG. An electrical signal S is output in which a shaft vibration waveform signal 18 corresponding to the vibration of the pump shaft 8 is superimposed on a rotation pulse signal 17 corresponding to the pump shaft 8 . This electric signal S is F
-V converter 20 converts the voltage into a voltage proportional only to the frequency of rotation pulse signal 17, and displays the rotation speed of pump shaft 8 on monitor 21 using this voltage. On the other hand, the electric signal S is also input to a filter 22, which removes the rotation pulse signal 17 from the electric signal S and extracts only the shaft vibration waveform signal 18 shown in FIG. This shaft vibration waveform signal 18 is input to a frequency analyzer 23 to analyze the frequency of the vibration of the pump shaft 8, that is, to determine the amplitude value and moving frequency, and display the results on the monitor 21. If a personal computer is used as the frequency analyzer 23, the measurement time can be shortened, and an alarm can be generated depending on the vibration state of the pump shaft 8, or the recirculation pump can be automatically stopped. Interlock signals such as the following can be issued.
上記した本発明の実施例によれば、ポンプ軸８
の振動を直接測定することができ、万一、再循環
ポンプに異常が発生した場合、それを早期に発見
することができ、原子炉内蔵型再循環ポンプの信
頼性を向上することができる。また、ポンプ軸８
の回転数および振動の監視をポンプ軸８自体でな
く、ポンプ軸８の下端に取り付けた逆転防止器１
１に切欠き１０を設けて行うようにしてあるの
で、ポンプ軸８の強度保持上好ましい。そして、
逆転防止器１１は、特に強度を持たせる必要がな
いので、切欠き１０を設けても特に問題を生ずる
ことがなく、また、切欠き１０を逆転防止器１１
の外周の軸対象位置に設けるようにすれば、バラ
ンス上問題を生ずることがない。また、検出器は
非接触変位計１２を１個取り付けるだけで、ポン
プ軸８の回転数と振動とを測定できるので、ポン
プケーシング４に設ける貫通孔を増す必要がな
く、また、変位計１２はガスケツト１４を介して
ポンプケーシング４に気密に取り付けたブツシユ
１３に取り付けてあるので、冷却水漏洩防止をは
かることができ、原子炉内蔵型再循環ポンプとし
ての利点を生かすことができる。また、再循環ポ
ンプの製造を大きく変更する必要がなく、Ｆ−Ｖ
コンバータ２０、フイルタ２２、周波数分析装置
２３等は制御建屋内の計装盤に組み込めばよいか
ら、従来の原子炉内蔵型再循環ポンプに容易に適
用可能である。 According to the embodiment of the present invention described above, the pump shaft 8
It is possible to directly measure the vibrations of the reactor, and in the unlikely event that an abnormality occurs in the recirculation pump, it can be detected early and the reliability of the recirculation pump built into the reactor can be improved. In addition, the pump shaft 8
The reverse rotation preventer 1 is attached to the lower end of the pump shaft 8 instead of the pump shaft 8 itself to monitor the rotation speed and vibration of the pump shaft 8.
Since this is done by providing a notch 10 in the pump shaft 8, it is preferable to maintain the strength of the pump shaft 8. and,
Since the reversal preventer 11 does not need to be particularly strong, there is no problem even if the notch 10 is provided.
If it is provided at an axially symmetrical position on the outer periphery, there will be no problem in terms of balance. In addition, since the detector can measure the rotation speed and vibration of the pump shaft 8 by simply attaching one non-contact displacement meter 12, there is no need to increase the number of through holes provided in the pump casing 4. Since it is attached to the bush 13 which is airtightly attached to the pump casing 4 via the gasket 14, leakage of cooling water can be prevented and the advantages of a recirculation pump built into a nuclear reactor can be utilized. Also, there is no need to make major changes to the manufacturing of the recirculation pump, and the F-V
Since the converter 20, filter 22, frequency analyzer 23, etc. can be incorporated into the instrumentation panel in the control building, they can be easily applied to a conventional recirculation pump built into a nuclear reactor.
なお、第５図においては、Ｆ−Ｖコンバータ２
０により回転パルス信号１７の周波数に比例した
電圧を得るようにしてあるが、直接周波数を測定
するようにしてもよいことはいうまでもない。 In addition, in FIG. 5, the F-V converter 2
0 to obtain a voltage proportional to the frequency of the rotational pulse signal 17, it goes without saying that the frequency may also be directly measured.
以上説明したように、本発明によれば、ポンプ
ケーシング内にはポンプ軸の回転数を検出する非
接触型変位計を取り付けるだけでポンプ軸の振動
をも監視することができ、原子炉内蔵型再循環ポ
ンプの信頼性を大幅に向上できるという効果があ
る。
As explained above, according to the present invention, vibration of the pump shaft can be monitored simply by installing a non-contact displacement meter that detects the rotation speed of the pump shaft inside the pump casing. This has the effect of greatly improving the reliability of the recirculation pump.
第１図は原子炉内蔵型再循環ポンプの縦断面
図、第２図は本発明に係る軸振動監視システムを
備えた原子炉内蔵型再循環ポンプの一実施例を示
す構造説明図、第３図は第２図のＡ部詳細図、第
４図は第３図の非接触変位計の取付部の一実施例
を示す断面図、第５図は本発明の原子炉内蔵型再
循環ポンプの軸振動監視システムの一実施例を示
すブロツク図、第６図は第５図の非接触変位計の
出力電気信号の波形図、第７図の電気信号から分
離した軸振動波形信号の波形図である。
４……ポンプケーシング、８……ポンプ軸、１
０……切欠き、１１……逆転防止器、１２……非
接触変位計、１３……ブツシユ、１４……ガスケ
ツト、２０……Ｆ−Ｖコンバータ、２１……モニ
ター、２２……フイルタ、２３……周波数分析装
置。
FIG. 1 is a vertical sectional view of a recirculation pump built into a reactor, FIG. 2 is a structural explanatory diagram showing an embodiment of a recirculation pump built into a reactor equipped with a shaft vibration monitoring system according to the present invention, The figure is a detailed view of part A in Figure 2, Figure 4 is a sectional view showing an example of the mounting part of the non-contact displacement meter in Figure 3, and Figure 5 is a detailed view of the part A in Figure 2. A block diagram showing one embodiment of the shaft vibration monitoring system, FIG. 6 is a waveform diagram of the output electrical signal of the non-contact displacement meter in FIG. 5, and a waveform diagram of the shaft vibration waveform signal separated from the electrical signal in FIG. 7. be. 4...Pump casing, 8...Pump shaft, 1
0... Notch, 11... Reverse prevention device, 12... Non-contact displacement meter, 13... Bush, 14... Gasket, 20... F-V converter, 21... Monitor, 22... Filter, 23 ...Frequency analyzer.
Claims (1)
の取付部材に設けた切欠きを検出するポンプケー
シング内下端に取り付けた非接触型変位計と、該
変位計で検出された前記ポンプ軸の回転にともな
う前記切欠きの通過回数と前記ポンプ軸の振動と
に対応した電気信号を入力して前記切欠きの通過
回数に応じた回転パルス信号と前記ポンプ軸の振
動に応じた軸振動波形信号とに分離する信号分離
手段と、前記軸振動波形信号を入力して前記ポン
プ軸の振動の周波数分析を行う周波数分析手段
と、前記回転パルス信号と前記周波数分析手段の
出力とを入力して前記ポンプ軸の回転数と振動と
を表示する表示手段とよりなることを特徴とする
原子炉内蔵型再循環ポンプの軸振動監視システ
ム。1. A non-contact displacement meter attached to the lower end of the pump casing that detects a notch provided in the mounting member at the lower end of the pump shaft of the reactor built-in recirculation pump, and the rotation of the pump shaft detected by the displacement meter. An electric signal corresponding to the number of passages of the notch and the vibration of the pump shaft is inputted to generate a rotation pulse signal corresponding to the number of passages of the notch and a shaft vibration waveform signal corresponding to the vibration of the pump shaft. a signal separating means for inputting the shaft vibration waveform signal to perform frequency analysis of the vibration of the pump shaft; A shaft vibration monitoring system for a recirculation pump built into a nuclear reactor, comprising a display means for displaying shaft rotational speed and vibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58203256A JPS6093995A (en) | 1983-10-28 | 1983-10-28 | Shaft vibration monitoring system for reactor built-in recirculation pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58203256A JPS6093995A (en) | 1983-10-28 | 1983-10-28 | Shaft vibration monitoring system for reactor built-in recirculation pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6093995A JPS6093995A (en) | 1985-05-25 |
| JPH0439635B2 true JPH0439635B2 (en) | 1992-06-30 |
Family
ID=16471008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58203256A Granted JPS6093995A (en) | 1983-10-28 | 1983-10-28 | Shaft vibration monitoring system for reactor built-in recirculation pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6093995A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60157090A (en) * | 1984-01-26 | 1985-08-17 | 株式会社東芝 | Controller for operation of reactor refrigerant recirculating pump |
| JPH07119825B2 (en) * | 1988-08-12 | 1995-12-20 | 株式会社東芝 | Internal pump rotation status detector |
| JP7779744B2 (en) * | 2022-01-07 | 2025-12-03 | 三菱重工マリンマシナリ株式会社 | Vibration monitoring device, turbocharger, and vibration monitoring method |
-
1983
- 1983-10-28 JP JP58203256A patent/JPS6093995A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6093995A (en) | 1985-05-25 |
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