JPS62182402A - Blade vibration monitor for rotary machine - Google Patents
Blade vibration monitor for rotary machineInfo
- Publication number
- JPS62182402A JPS62182402A JP2289886A JP2289886A JPS62182402A JP S62182402 A JPS62182402 A JP S62182402A JP 2289886 A JP2289886 A JP 2289886A JP 2289886 A JP2289886 A JP 2289886A JP S62182402 A JPS62182402 A JP S62182402A
- Authority
- JP
- Japan
- Prior art keywords
- blade
- frequency
- detector
- level
- interest
- 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
- 238000011160 research Methods 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims description 2
- 230000010349 pulsation Effects 0.000 abstract description 5
- 238000011156 evaluation Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、蒸気タービン、ガスタービン、軸流圧縮機等
の回転機械における翼の疲労、損傷を検出するための翼
振動監視の技術分野で利用される。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is utilized in the technical field of blade vibration monitoring for detecting blade fatigue and damage in rotating machines such as steam turbines, gas turbines, and axial flow compressors. Ru.
従来の技術
従来、回転機械の翼の振動を積極的に監視する工学的計
器は実用化されていない。研究や調査用として翼に直接
、歪ゲージを貼付け、これより信号を取り出してテレメ
ーターシステムやスリップリングにより振動応力を測定
するものや翼の先端の周方向の振動を回転むらとして検
出する方法が用いられている位である。BACKGROUND OF THE INVENTION Hitherto, no engineering instruments have been put into practice that actively monitor the vibrations of rotating machinery blades. For research and investigation purposes, there are methods that attach strain gauges directly to the blades and extract signals from them to measure vibration stress using a telemeter system or slip ring, and methods that detect vibrations in the circumferential direction of the blade tips as rotational irregularities. This is the level in which it is used.
発明が解決しようとする問題点
本発明は、回転機械の翼の振動監視を工業的に可能なら
しめることにある。このために、解決すべき問題点は次
の通りである。Problems to be Solved by the Invention The object of the present invention is to make it possible to industrially monitor the vibrations of blades of rotating machines. For this purpose, the problems to be solved are as follows.
ａ）、実機実稼動条件での実用に耐えるため、耐久性の
あるシステムであること、歪ゲージやテレメーター、ス
リップリング等を用いる研究用のシステムでは寿命が不
充分である。a) The system must be durable so that it can withstand practical use under actual operating conditions; research systems that use strain gauges, telemeters, slip rings, etc. do not have sufficient service life.
ｂ）、装置のコンパクト化のため、回転体上でなく、静
止側にセンサを取付ける方法が望ましい。b) In order to make the device more compact, it is desirable to mount the sensor on the stationary side rather than on the rotating body.
問題点を解決するための手段
本発明は、上述の問題に対処するため、次のような手段
を採っている。すなわち、
着目スる累近傍のケーシングに、運転中の変動圧力を測
定する圧力検出器を配設し、その信号を周波数分析し、
予め調査又は計算によって求めておいた着目する翼特有
の振動数成分を選び出して、各運転条件における基準レ
ベルと比較し、異常あればこれを検出して警報を出す装
置を備え、さらニ、するレベル以上の振動のかかった時
間を積算し、翼の疲労、寿命等を演算する装置を備える
。Means for Solving the Problems The present invention takes the following measures in order to deal with the above-mentioned problems. In other words, a pressure detector that measures fluctuating pressure during operation is installed in the casing near the point of interest, and the signal is frequency-analyzed.
It is equipped with a device that selects the frequency component unique to the blade of interest, which has been determined in advance by investigation or calculation, and compares it with the standard level under each operating condition, detects any abnormality, and issues an alarm. It is equipped with a device that calculates the fatigue, lifespan, etc. of the blade by integrating the amount of time it takes for vibrations to exceed this level.
作用
以上述べた手段によれば、したがって、着目する翼が過
大振動を発生すると、翼の周りの媒体（蒸気、ガス、空
気）を振動させ、圧力振動を生じるが、この圧力脈動を
着目翼近傍に設置した微少圧力センサー（マイクロホン
）が検知する。検出された圧力脈動の中には真に翼の振
動によるもののみならず種々の雑音が混在している。According to the means described above, therefore, when the target blade generates excessive vibration, it causes the medium (steam, gas, air) around the blade to vibrate, producing pressure oscillations. Detected by a minute pressure sensor (microphone) installed at the The detected pressure pulsations include not only those caused by blade vibrations but also various other noises.
検知された信号の中から、翼の振動に関するものを抽出
する演算回路により、翼の振動数成分を選択し、出力し
て、これをチェックし、異常があれば、警報を出す。ま
た、長期的な寿命評価のだめの演算も引続き行なうこと
も出来る。An arithmetic circuit that extracts those related to blade vibration from the detected signals selects the frequency component of the blade, outputs it, checks this, and issues an alarm if there is an abnormality. In addition, calculations for long-term life evaluation can also be continued.
実施例
次に、本発明の一実施例について、添付図面を参照して
詳述する。Embodiment Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
図面では、蒸気タービンについて述べているが、ガスタ
ービンや軸流圧縮機についても同様である。In the drawings, a steam turbine is described, but the same applies to gas turbines and axial flow compressors.
蒸気タービンの最終翼に着目し、動翼２の近傍に圧力検
出器（マイクロホン）７を取付け、これを信号増幅器（
アンプ）８を通して周波数分析器１１に導く。一方、回
転数を正確に検出するために、回転パルス検出器９があ
り、この信号は波形整形器１０を通して回転数演算器１
２に導かれる。Focusing on the last blade of the steam turbine, a pressure detector (microphone) 7 is installed near the rotor blade 2, and this is connected to a signal amplifier (
Amplifier) 8 leads to a frequency analyzer 11. On the other hand, in order to accurately detect the rotation speed, there is a rotation pulse detector 9, and this signal is passed through a waveform shaper 10 to a rotation speed calculator 1.
Guided by 2.
また、翼振動数ファイル１４から着目すべき振動数が指
示され、着目振動数設定器１３で設定される。これらの
信号から、着目振動数の脈動レベル検出器１５が作動し
、出力が得られる。Further, the frequency of interest is specified from the blade frequency file 14 and set by the frequency of interest setter 13. From these signals, the pulsation level detector 15 of the frequency of interest is activated and an output is obtained.
この出力を予め求めである脈動から振動への換算値設定
器１６により、振動又は応力に換算し、翼振動評価１７
をして、必要ならば警報出力１８を出す。また、これら
のデータは蓄積され翼寿命計算器１９で使用され、疲労
損傷に対する警報出力１８が出される。図中、符号１は
ロータ、３は静翼、４は軸受、５はグランドシール、６
は復水器、９ｂは回転マーク、ｅは蒸気入口を示す。This output is converted into vibration or stress by a pulsation-to-vibration conversion value setter 16, which is determined in advance, and the blade vibration evaluation 17
and output alarm output 18 if necessary. These data are also accumulated and used by a blade life calculator 19 to provide an alert output 18 for fatigue damage. In the figure, 1 is the rotor, 3 is the stationary blade, 4 is the bearing, 5 is the gland seal, and 6 is the rotor.
9b is a rotation mark, and e is a steam inlet.
発明の効果 本発明になる監視装置は次のような効果を有する。Effect of the invention The monitoring device according to the present invention has the following effects.
ａ）回転体（ロータ）上にセンサーを取付けることなく
、翼の過大振動を検出できる。a) Excessive blade vibration can be detected without installing a sensor on the rotating body (rotor).
ｂ）検出した過大振動の信号により的確に警報を出すこ
とが可能であり、さらに、長期的に疲労、寿命を演算し
ながら運転が出来る。b) It is possible to issue an alarm accurately based on the detected excessive vibration signal, and furthermore, it is possible to operate while calculating fatigue and life over a long period of time.
図面は本発明の構成を示す系統図である。
１ｅ−ロータ、２１１１＋動翼、３−−％翼、４＠・軸
受、５・・グランドシール、６・・復水器、７・・圧力
検出器（マイクロホン）、８・・信号増幅器（アンプ）
、９・・回転パルス検出器、９ｂ・・回転マーク、工０
・・波形整形器、１１・・周波数分析器、１２・・回転
数演算器、１３・・着目振動数設定器、１４・・翼振動
数ファイル、１５・・着目振動数脈動レベル検出器、１
６・・演算値設定器（脈動から振動への）、１７・・翼
振動評価、１８・・警報出方、１９・・翼寿命計算器。
（ほか）名）The drawing is a system diagram showing the configuration of the present invention. 1e-rotor, 2111+ moving blade, 3--% blade, 4@・bearing, 5... ground seal, 6... condenser, 7... pressure detector (microphone), 8... signal amplifier (amplifier)
, 9...Rotation pulse detector, 9b...Rotation mark, work 0
...Waveform shaper, 11..Frequency analyzer, 12..Rotation speed calculator, 13..Target frequency setter, 14..Blade vibration frequency file, 15..Target frequency pulsation level detector, 1
6. Calculated value setting device (from pulsation to vibration), 17. Blade vibration evaluation, 18. Alarm output method, 19. Blade life calculator. (other) names)
Claims (1)
転機械であつて、着目する翼近傍のケーシングに、運転
中の変動圧力を測定する圧力検出器を配設し、その信号
を周波数分析し、予め調査又は計算によつて求めておい
た着目する翼特有の振動数成分を選び出して、各運転条
件における基準レベルと比較し警報を出す装置を備え、
さらに、あるレベル以上の振動のかかつた時間を積算し
翼の疲労、寿命等を演算する装置を備えた回転機械の翼
振動監視装置。In rotary machines such as steam turbines, gas turbines, and axial flow compressors, a pressure detector that measures fluctuating pressure during operation is installed in the casing near the blade of interest, and the signal is frequency-analyzed. Equipped with a device that selects the frequency component unique to the blade of interest, determined through research or calculation in advance, compares it with the reference level under each operating condition, and issues an alarm.
Furthermore, a blade vibration monitoring device for rotating machinery is equipped with a device that calculates blade fatigue, lifespan, etc. by integrating the time during which vibrations exceed a certain level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2289886A JPS62182402A (en) | 1986-02-06 | 1986-02-06 | Blade vibration monitor for rotary machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2289886A JPS62182402A (en) | 1986-02-06 | 1986-02-06 | Blade vibration monitor for rotary machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62182402A true JPS62182402A (en) | 1987-08-10 |
Family
ID=12095463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2289886A Pending JPS62182402A (en) | 1986-02-06 | 1986-02-06 | Blade vibration monitor for rotary machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62182402A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011007677A (en) * | 2009-06-26 | 2011-01-13 | Ihi Corp | Vibration analysis system for turbine blade |
| WO2017212671A1 (en) * | 2016-06-06 | 2017-12-14 | 株式会社Ihi | Distortion estimation device, diagnosis device, and distortion estimation method |
-
1986
- 1986-02-06 JP JP2289886A patent/JPS62182402A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011007677A (en) * | 2009-06-26 | 2011-01-13 | Ihi Corp | Vibration analysis system for turbine blade |
| WO2017212671A1 (en) * | 2016-06-06 | 2017-12-14 | 株式会社Ihi | Distortion estimation device, diagnosis device, and distortion estimation method |
| JP2017219361A (en) * | 2016-06-06 | 2017-12-14 | 株式会社Ihi | Strain estimation device, diagnosis device and strain estimation method |
| RU2702404C1 (en) * | 2016-06-06 | 2019-10-08 | АйЭйчАй КОРПОРЕЙШН | Deformation evaluation device, diagnostic device and deformation evaluation method |
| US11119004B2 (en) | 2016-06-06 | 2021-09-14 | Ihi Corporation | Strain estimation device, diagnosis device, and strain estimation method |
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