JP2000146771A - Simple abnormality diagnostic method for acceleration/ deceleration type rotary machine equipment - Google Patents

Simple abnormality diagnostic method for acceleration/ deceleration type rotary machine equipment

Info

Publication number
JP2000146771A
JP2000146771A JP10328230A JP32823098A JP2000146771A JP 2000146771 A JP2000146771 A JP 2000146771A JP 10328230 A JP10328230 A JP 10328230A JP 32823098 A JP32823098 A JP 32823098A JP 2000146771 A JP2000146771 A JP 2000146771A
Authority
JP
Japan
Prior art keywords
acceleration
value
deceleration
vibration
machine equipment
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.)
Withdrawn
Application number
JP10328230A
Other languages
Japanese (ja)
Inventor
Toru Akashi
透 明石
Tetsuya Kato
哲也 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP10328230A priority Critical patent/JP2000146771A/en
Publication of JP2000146771A publication Critical patent/JP2000146771A/en
Withdrawn legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a method for simply diagnosing an abnormality of an acceleration deceleration type rotary machine equipment whereby a state of the machine equipment whose drive state repeats acceleration and deceleration at all times can be accurately diagnosed. SOLUTION: In the method for diagnosing with use of a measured vibration and a rotational speed signal an abnormality of an acceleration deceleration type rotary machine equipment which completes one operation from an acceleration to a deceleration and changes the number of revolutions every operation, an overall value of a measured vibration spectrum or a value at a rotational speed when a load current of a prime mover of a rotary machine is controlled is used as a diagnostic parameter. Values of the diagnostic parameter at a plurality of top speeds are collected in a state where the top speeds measured with the equipment in a normal state beforehand are different. A relationship of the values is formulated. The diagnostic parameter is interpolated or extrapolated at an optional timing with use of the formula, whereby the parameter is converted to a diagnosis parameter in a state of a predetermined rotational speed and managed.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、たとえばモーター
等の回転機器の異常をその振動の加速度、速度、変位あ
るいは電流値の変動に基づいて異常の有無を診断するた
めの簡易診断方法に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple diagnostic method for diagnosing abnormality of a rotating device such as a motor based on fluctuations of acceleration, speed, displacement or current value of the vibration. is there.

【0002】[0002]

【従来の技術】回転機械設備において歯車の異常や軸受
等の機械要素の異常を常に監視し、異常が発生した場合
は、速やかに対策をとることは、安定した生産状態を維
持するための重要な要素と共に実行することが要求され
る。またこのような中で異常を判定する設備の異常の有
無を判定する設備の異常診断方法の前提は、設備の可動
状態が安定且つ所定の回転数(運転状態)において測定
した振動及び電流値等を基にした診断パラメータに対し
てのみ有効であった。したがって生産ラインを止めなけ
れば可動状態が常に加減速状態であるような機械設備に
対しては診断パラメータを獲得することは困難で設備の
異常診断は困難であった。
2. Description of the Related Art It is important to constantly monitor for abnormalities in gears and mechanical elements such as bearings in rotating machinery and to take prompt measures when abnormalities occur, in order to maintain a stable production state. It is required to execute together with the various elements. In addition, a method for diagnosing an abnormality in equipment that determines the presence or absence of an abnormality in such equipment is based on the assumption that the movable state of the equipment is stable and the vibration and current values measured at a predetermined rotation speed (operating state). Only valid for diagnostic parameters based on Therefore, it is difficult to obtain diagnostic parameters for mechanical equipment whose movable state is always in an acceleration / deceleration state unless the production line is stopped, and it is difficult to diagnose abnormality of the equipment.

【0003】そこで特開昭54−154059号では、
異常兆候を示す診断パラメータとして検出された振動信
号に対して所定の処理を行って得られた信号と、回転数
検知器で検知された回転機械の回転数とを次数比分析回
路に入力し、回転次数比を求めて該回転機械の異常診断
を行う方法が、また特開平4−279826号では異常
兆候データとして検出された振動信号に対して所定の処
理を行って得られた信号と、回転数検出器で検出された
回転機械の回転数とをデジタル信号として測定した後に
予め設定した標準回転周期と回転系の回転周期の比率か
ら、該回転周期信号と同時にサンプリングされた前記振
動信号を使うことによって回転数が変動する設備の診断
が可能となる方法が開示された。
In Japanese Patent Application Laid-Open No. 54-154059,
A signal obtained by performing a predetermined process on a vibration signal detected as a diagnostic parameter indicating an abnormal sign and a rotation speed of a rotating machine detected by a rotation speed detector are input to an order ratio analysis circuit, A method of diagnosing abnormality of the rotating machine by obtaining a rotation order ratio is disclosed in Japanese Patent Application Laid-Open No. 4-279826. A signal obtained by performing a predetermined process on a vibration signal detected as abnormality sign data, After measuring the number of rotations of the rotating machine detected by the number detector as a digital signal, from the ratio of the preset standard rotation period and the rotation period of the rotation system, use the vibration signal sampled simultaneously with the rotation period signal. Thus, a method has been disclosed that enables diagnosis of equipment whose rotational speed fluctuates.

【0004】[0004]

【発明が解決しようとする課題】しかし、上記特開昭5
4−154059号で公報に記載された発明は専用のア
ナログ回路を設ける必要があった。また上記特開平4−
279826号および特開平8−266098号では回
転数の加速及び減速レートに依存する種々の診断パラメ
ータの変化、あるいは、個々の設備に特有の診断パラメ
ータ変化状況に対応する考慮がなされておらず、異常診
断の精度が低下すると言う問題があった。例えば図4の
A部分に示す減速機の振動データのように振動波形と回
転速度のグラフを見ると加速時と減速時の振動波形が違
っていることにより加速と減速中の回転状態では振動の
出方が違っている点などである。本発明は、加減速運転
型の回転機械設備の異常診断を実施できる方法を提供す
ることを目的とする。
However, Japanese Patent Application Laid-Open No.
The invention described in Japanese Patent Application Laid-Open No. 4-154059 required the provision of a dedicated analog circuit. In addition, Japanese Unexamined Patent Publication No.
279826 and JP-A-8-266098 do not take into account changes in various diagnostic parameters that depend on the acceleration and deceleration rates of the rotational speed, or changes in diagnostic parameters that are unique to individual equipment. There is a problem that the accuracy of diagnosis is reduced. For example, when looking at the graph of the vibration waveform and the rotation speed as shown in the vibration data of the speed reducer shown in part A of FIG. 4, the vibration waveforms at the time of acceleration and deceleration are different due to the difference between the vibration waveforms at the time of acceleration and deceleration. The point is that they are different. An object of the present invention is to provide a method capable of performing abnormality diagnosis of an acceleration / deceleration operation type rotating machine facility.

【0005】[0005]

【課題を解決するための手設】本発明は、稼働状態が常
に加減連を繰り返す機械設備の状態を、精度よく診断で
きる、加減連型回転機械設備の簡易異常診断方法を提供
するもので、 (1)請求項1記載の発明においては、動作が加速から
減速で完了し、しかも回転数が運転する度に変動する加
減速型回転機械設備に対し、測定した振動及び回転速度
信号を利用して異常診断を行う方法において、予め正常
状態の回転機械設備で測定した複数回の加速・減速運転
時の複数個のトップ速度における回転数と振動スペクト
ルのオーバーオール値、あるいは回転機の原動機の負荷
電流値の関係振動値を標準診断パラメータ値として補正
式を作成し、任意のタイミングで測定した振動スペクト
ルのオーバーオール値、または回転機械の原動機の負荷
電流の所定の回転速度での値を前記補正式に代入し、基
準速度での補正診断値を求め、 補正診断値を「しきい
値」と比較管理することを特徴とする加減速型回転機械
設備の簡易診断方法である。 (2)請求項2記載の発明においては、補正式を作成す
るに際し、1次ないし2次以上の高次関数、指数関数或
いは対数関数を用いることを特徴とする加減速型回転機
械設備の簡易診断方法である。 (3)請求項3の発明においては、測定した振動及び回
転速度信号にノイズ処理を施した後に、トップ速度にお
ける補正式を作成することを特徴とする加減速型回転機
械設備の簡易診断方法である。 (4)請求項4の発明においては、時系列で表した回転
速度の微分値が負の方向に変動する前の状態で、診断パ
ラメータを採取することを特徴とする加減速型回転機械
設備の簡易診断方法である。
SUMMARY OF THE INVENTION The present invention provides a simple abnormality diagnosis method for a rotary machine with adjustable rotation, which is capable of accurately diagnosing the state of mechanical equipment whose operating state constantly repeats addition and subtraction. (1) According to the first aspect of the present invention, the measured vibration and rotation speed signals are used for an acceleration / deceleration-type rotating machine equipment whose operation is completed from acceleration to deceleration and whose rotation speed fluctuates each time it is operated. In the method of diagnosing abnormalities, the overall values of the rotational speed and vibration spectrum at a plurality of top speeds during multiple acceleration / deceleration operations measured in advance in rotating machinery and equipment in a normal state, or the load current of the prime mover of a rotating machine A correction formula is created using the vibration value as a standard diagnostic parameter value, and the overall value of the vibration spectrum measured at an arbitrary timing or the load current of the prime mover of a rotating machine The acceleration / deceleration type rotating machine equipment characterized by substituting the value at a predetermined rotation speed into the correction formula, obtaining a correction diagnosis value at a reference speed, and comparing and managing the correction diagnosis value with a “threshold”. This is a simple diagnosis method. (2) According to the second aspect of the present invention, when the correction formula is created, a higher-order function, exponential function or logarithmic function of first or second order or higher is used, and the acceleration / deceleration type rotary machine equipment is simplified. This is a diagnostic method. (3) According to the third aspect of the present invention, there is provided a simple diagnosis method for an acceleration / deceleration type rotating machine facility, wherein a noise reduction process is performed on the measured vibration and rotation speed signals, and then a correction formula at the top speed is created. is there. (4) According to a fourth aspect of the present invention, there is provided an acceleration / deceleration-type rotating machine facility, wherein a diagnostic parameter is collected before a differential value of a rotation speed expressed in a time series fluctuates in a negative direction. This is a simple diagnosis method.

【0006】(作用)請求項1記載の発明においては、
短時間でしかも可動回転数が毎回違う加減速を行う加減
速型回転機械設備の異常該断を簡易に予め正常な状態で
求めた速度と診断パラメータの変換式を利用して、診断
を行う測定したデータを基準速度の診断パラメータ値に
修正し、これを「しきい値」と比較管理を行うものであ
り、短時間で診断管理することが出来る。請求項2記載
の発明においては、回転速度信号と診断パラメータとの
関係を表す式化で1次ないし2次以上の高次関数或いは
指数関数を用いることで、更に精度の高い診断が可能と
なる。請求項3記載の発明においては、測定した振動及
び回転速度信号にノイズ処理を施した後にトップ速度と
診断パラメータ値の関係を表す式を求めることによりさ
らに精度の高い診断をすることが出来る。請求項4記載
の発明においては、時系列で表した回転速度の微分値が
負の方向に変動する前の状態で状態診断パラメータをセ
ットすることになり、減速機の振動データのように振動
波形と回転速度のグラフを見ると加速時と減速時の振動
波形が異なるが、加速時のみのデータを利用するため、
診断の精度が落ちることを防止する。
(Function) In the invention described in claim 1,
Abnormality of acceleration / deceleration-type rotating machinery that performs acceleration / deceleration in which the movable rotation speed is different every time in a short time. Measurement that performs diagnosis using the conversion formula of speed and diagnostic parameters obtained in advance in a normal state simply in advance. The corrected data is corrected to the diagnostic parameter value of the reference speed, and this is compared with the "threshold value", and the diagnostic management can be performed in a short time. According to the second aspect of the present invention, a more accurate diagnosis can be performed by using a higher order function or an exponential function of the first or second order or higher in the expression representing the relationship between the rotation speed signal and the diagnosis parameter. . According to the third aspect of the present invention, more accurate diagnosis can be performed by obtaining an expression representing the relationship between the top speed and the diagnostic parameter value after performing noise processing on the measured vibration and rotation speed signals. According to the fourth aspect of the present invention, the state diagnosis parameter is set in a state before the differential value of the rotational speed expressed in time series fluctuates in the negative direction. Looking at the graph of rotation speed, the vibration waveforms at the time of acceleration and at the time of deceleration are different, but since data only at the time of acceleration is used,
Prevents the accuracy of diagnosis from deteriorating.

【0007】[0007]

【発明の実施の形態】以下、本発明の実施例について、
図面を参照しながら説明する。図1は本発明による加減
速型回転機械設備の簡易異常診断方法を説明するフロー
チャートである。図2は本発明を実現させるための異常
診断装置を示すブロック図である。図3は本発明にかか
る補正処理を説明するための過渡的な回転速度のピーク
値−振動レベル特性図である。図2に示すように、異常
診断装置はCPU(中央処理ユニット)201を中心
に、バス202に接続された入力インターフェイス20
3、プログラム及び設定値等が格納されたROM(リー
ド・オンリー・メモリ)204、測定値等が一時的に格
納されるRAM(ランダム・アクセス・メモリ)20
5、及び出カインタ−フェース206から構成されるコ
ンピュータ部分で構成されている。
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. FIG. 1 is a flowchart illustrating a simple abnormality diagnosis method for an acceleration / deceleration type rotary machine according to the present invention. FIG. 2 is a block diagram showing an abnormality diagnosis device for realizing the present invention. FIG. 3 is a graph showing a transient rotation speed peak value-vibration level characteristic for explaining the correction processing according to the present invention. As shown in FIG. 2, the abnormality diagnosis device mainly includes a CPU (central processing unit) 201 and an input interface 20 connected to a bus 202.
3. ROM (read only memory) 204 in which programs and set values are stored, RAM (random access memory) 20 in which measured values are temporarily stored
5 and an output interface 206.

【0008】さらに、入力インターフェイス203に
は、振動値である加速度または速度、振動センサー、あ
るいは電動機の電流値を測定するためのセンサー207
が接続され、出力インターフェース206には、ブザー
等の電気−音響変換デパイス及びこれを駆動する駆動回
路から成る警報機208が接続されている。
Further, an input interface 203 has an acceleration or speed, which is a vibration value, a vibration sensor, or a sensor 207 for measuring a current value of a motor.
The output interface 206 is connected to an alarm 208 including an electro-acoustic conversion device such as a buzzer and a drive circuit for driving the device.

【0009】センサー207は、振動を測る場合であれ
ば振動センサー207aを直接回転機械装置に取り付
け、振動スペクトルのオーバーオール値を測定する。こ
こで、振動スペクトルのオーバーオール値とは、例え
ば、10KHz〜40KHzまでの周波数帯域の振動ス
ペクトルの総和を示している。通常、振動診断の場合、
オーバーオールの大小によって回転機械の異常判定が可
能となるパラメータの1つである。また、センサー20
7として原動機の負荷電流を測るのであれば、電動機の
電流回路に絶縁アンプ207bを設置し測定し、センサ
ー207の前記振動あるいは電流値のデータを、回転機
械装置の回転数を測定するための回転計測器209の回
転パルスと共に、入力インターフェース203に接続し
ている。
When measuring vibration, the sensor 207 directly attaches the vibration sensor 207a to the rotating mechanical device, and measures the overall value of the vibration spectrum. Here, the overall value of the vibration spectrum indicates, for example, the sum of the vibration spectra in a frequency band from 10 KHz to 40 KHz. Usually, for vibration diagnosis,
This is one of the parameters that makes it possible to determine the abnormality of the rotating machine depending on the size of the overall. In addition, the sensor 20
If the load current of the prime mover is measured as 7, an insulation amplifier 207 b is installed in the current circuit of the motor and measured, and the vibration or current value data of the sensor 207 is used to measure the rotation speed of the rotating mechanical device. It is connected to the input interface 203 together with the rotation pulse of the measuring instrument 209.

【0010】次に、CPU201は図1に示す処理を実
行する。即ち、設置した直後における回転機器の回転数
と振動あるいは電流値の関係を測定し、これを初期値と
して記憶保存する(ST101)。次に、稼働中の振動
値をまたは電流値を振動センサーあるいは絶縁アンプ2
07によって測定し、この測定値をCPU201は入力
インターフェイス203を介して読み込み、バス202
を介してRAM205に格納する(ST102)。可動
中の機器の回転数が判定可能な基準速度と一致している
かを判定し、一致している場合(ST103)、処理を
ステップ105へ移行し、一致していない場合、ステッ
プl02による測定値及びROM204に保存してある
データ(振動データあるいは電流値データと、回転デー
タをデータ抽出処理により求めた補正式)に基づいて補
正演算処理を行う(ST104)。この補正演算は回転
速度ピーク値nと振動値Vとの相関関係を最小二乗法で
近似して式Sを求めるものである。
Next, the CPU 201 executes the processing shown in FIG. That is, the relationship between the rotational speed of the rotating device and the vibration or current value immediately after installation is measured, and this is stored and stored as an initial value (ST101). Next, the vibration value or current value during operation is measured using a vibration sensor or an insulation amplifier 2.
07, the CPU 201 reads the measured value via the input interface 203, and
(ST102). It is determined whether or not the rotation speed of the moving device matches the reference speed that can be determined. If the rotation speeds match (ST103), the process proceeds to step 105; Then, a correction calculation process is performed based on the data stored in the ROM 204 (a correction expression obtained by performing a data extraction process on the vibration data or the current value data and the rotation data) (ST104). In this correction operation, the correlation between the rotational speed peak value n and the vibration value V is approximated by the least squares method to obtain the expression S.

【0011】この補正処理の詳細については図3を参照
して説明する。例えば、図3に示すあるピーク回転速度
nにおける振動値Vnを、基準速度nsにおける振動値
Vsに補正すれば、どのような加減速状態でも見かけ上
常に基準速度状態で評価出来るようになる。このために
用いる式は一次以上の関数が用いられ、例えば、二次式
及び三次式の各々について示せば、次式で表される(但
し、Snは関数、A,B,Cは既知の係数)。 (二次式) Sn=A×(n−B)2+C (1) (三次式) Sn=A×(n−B)3+C (2) さらに、補正後の振動値Vsは、次のように求められ
る。 (二次式) Vs=A’×(ns−B)2+C (3) (三次式) Vs=A’’×(ns−B)3+C (4) ただし、 A’=(Vn−C)/(ns−B)2 (5) A’’=(Vn−C)/(ns−B)3 (6) ns=基準回転速度数 n =ステップ102で測定した時の回転速度 このような演算を行うプログラムはROM204に組み
込まれており、その実行はCPU201によって行われ
る。補正後の振動Vsに対し、予め設定されている「し
きい値」を越えたか否かを判定し(ST105)、越え
ていれば異常であると見なし、CPU201は出力イン
ターフェース206を介して警報器208を駆動し、警
告を発する(ST106)。また、ステップ103で回
転速度が基準速度と同じ場合と判定された場合も、その
振動値が「しきい値」を越えたか否かを判定して越えて
いれば異常と見なして警告を発する。尚、上記実施例に
おいては二次式または三次式を用いて補正を行う場合に
ついて説明したが、次に示すような指数関数あるいは対
数関数を用いて、補正式を求めても良い。 (指数関数) Sn=A×exp(n×B)+C (対数関数) Sn=A×loge(n+B)+C
The details of this correction process will be described with reference to FIG. For example, if the vibration value Vn at a certain peak rotational speed n shown in FIG. 3 is corrected to the vibration value Vs at the reference speed ns, it can be apparently evaluated in any reference state at any acceleration / deceleration state. For the expression used for this purpose, a function of first order or higher is used. For example, if each of a quadratic expression and a cubic expression is shown, the following expression is used (where Sn is a function and A, B, and C are known coefficients). ). (Secondary expression) Sn = A × (n−B) 2 + C (1) (Tertiary expression) Sn = A × (n−B) 3 + C (2) Further, the corrected vibration value Vs is as follows: Required. (Secondary expression) Vs = A ′ × (ns−B) 2 + C (3) (Tertiary expression) Vs = A ″ × (ns−B) 3 + C (4) where A ′ = (Vn−C) / (Ns-B) 2 (5) A ″ = (Vn−C) / (ns−B) 3 (6) ns = reference rotation speed n = rotation speed measured at step 102 Is executed by the CPU 201. The program for performing It is determined whether or not the corrected vibration Vs has exceeded a preset “threshold value” (ST 105). Then, a warning is issued (ST106). Also, when it is determined in step 103 that the rotation speed is the same as the reference speed, it is determined whether or not the vibration value exceeds the “threshold value”. In the above embodiment, the case where the correction is performed using the quadratic expression or the cubic expression has been described. However, the correction expression may be obtained using the following exponential function or logarithmic function. (Exponential function) Sn = A × exp (n × B) + C (logarithmic function) Sn = A × log e (n + B) + C

【0012】次に、ST101またはST1O2で採取
する際にアナログ値からデジタルに離散化された回転速
度、振動あるいは電流の時系列データを単純移動平均法
や多項式適合法などを用いて実施するが、この時データ
はスムージングを施したものとし、ST101またはS
T102を実行する。ここで、スムージングを施すこと
により、ノイズの多い診断パラメータに対しノイズ処理
を行い加速減速率の変化による外乱を削除することが可
能となるため、精度の高い診断データが得られ補正処理
を行える。なお、単純移動平均法や多項式適合法につい
ては、例えば「科学計測のための波形データ処理」(C
Q出版社 初版1986年4月30日 編著者 南茂夫
P88〜93)に詳しく記載されている。
Next, at the time of sampling in ST101 or ST1O2, time series data of rotation speed, vibration or current, which is digitally discretized from analog values, is implemented by using a simple moving average method, a polynomial fitting method, or the like. At this time, the data is assumed to have been subjected to smoothing, and ST101 or S
Execute T102. Here, by performing the smoothing, it is possible to perform a noise process on a diagnostic parameter having a large amount of noise and to remove a disturbance due to a change in the acceleration / deceleration rate, so that highly accurate diagnostic data can be obtained and a correction process can be performed. The simple moving average method and the polynomial fitting method are described in, for example, “Waveform Data Processing for Scientific Measurement” (C
Q publishers, first edition, April 30, 1986, edited by Shigeo Minami, pp. 88-93).

【0013】また、請求項4で述べた加速率の変化によ
って診断パラメータの値が変動しないように、予め加速
から減速に入らない状態で、すなわち時系列で表した回
転速度の微分値が負の方向に変動する前の状態で状態診
断パラメータをセットするタイミングはST101ある
いはST102で、たとえば事前に求める式(1)、式
(2)でのピーク回転数であるnを、減速がかかる前の
回転速度n’で設定をし、判定に際してはnsを減速が
かかるn’sとし判定する。このように、設定すること
により、回転気器の加速時と減速時の振動波形が違って
いても、常に加速時のデータを利用することにより、よ
り確実な診断を行うことが出来る。
Further, in order to prevent the value of the diagnostic parameter from fluctuating due to the change in the acceleration rate as described in claim 4, the differential value of the rotational speed expressed in time series is negative in a state where the vehicle does not enter from deceleration to deceleration in advance. The timing at which the state diagnosis parameter is set in the state before the change in the direction is ST101 or ST102. For example, the peak rotational speed n in Expressions (1) and (2) obtained in advance is determined by the rotation before deceleration. The speed is set at n ', and in the determination, ns is determined as n's at which deceleration takes place. By setting in this way, even if the vibration waveforms of the rotating gasket at the time of acceleration and at the time of deceleration are different, more reliable diagnosis can be made by always using the data at the time of acceleration.

【0014】[0014]

【発明の効果】本発明は上記の通り構或されているの
で、次に記載する効果を奏する。請求項1の加減速型回
転機械設備の簡易診断方法においては、通常の操業にお
いて加減速運転が主な可動状況の回転機械設備の異常診
断を製造ラインを止めること無く簡便に実施することが
出来るため設備の信頼性向上が期待出来る。請求項2な
いし4の加減速型回転機械設備の簡易診断方法において
は、設備固有の振動発生形態に合わせた診断が行うこと
が出来、且つノイズの多い診断パラメータに対しノイズ
処理を行い加速減速率の変化による外乱を削除すること
が可能となるため、回転機械設備の異常診断を製造ライ
ンを止めること無く精度良く実施することが出来るた
め、設備の信頼性向上が更に期待出来る。
Since the present invention is constructed as described above, the following effects can be obtained. According to the simple diagnosis method of the acceleration / deceleration type rotary machine equipment of the first aspect, the abnormality diagnosis of the rotary machine equipment in the main operating state where the acceleration / deceleration operation is the main in the normal operation can be easily performed without stopping the production line. Therefore, improvement of the reliability of the equipment can be expected. According to the simplified diagnostic method for an acceleration / deceleration type rotary machine equipment according to the second to fourth aspects, the diagnosis can be performed in accordance with the vibration generation form unique to the equipment, and the acceleration / deceleration rate is determined by performing noise processing on a noisy diagnostic parameter. Since it is possible to eliminate disturbance due to the change in the rotation speed, it is possible to accurately perform an abnormality diagnosis of the rotary machine equipment without stopping the production line, and further improve the reliability of the equipment.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明による回転機械設備の異常診断方法を説
明するフローチャートである。
FIG. 1 is a flowchart illustrating a method for diagnosing abnormalities in rotating machinery equipment according to the present invention.

【図2】本発明に基づく異常診断装置を示すブロック図
である。
FIG. 2 is a block diagram showing an abnormality diagnosis device according to the present invention.

【図3】本発明による補正処理を説明する図である。FIG. 3 is a diagram illustrating a correction process according to the present invention.

【図4】従来技術での課題を説明するための図で、加減
速可動状態の機械設備の振動と回転数を示した説明図で
ある。
FIG. 4 is a diagram for explaining a problem in the related art, and is an explanatory diagram showing vibration and rotation speed of mechanical equipment in an acceleration / deceleration movable state.

【符号の説明】[Explanation of symbols]

201 CPU 202 パス 203 入力インターフェイス 204 ROM 205 RAM 206 出力インターフェイス 207 振動センサー及び絶縁アンプ 208 警報器 201 CPU 202 Path 203 Input interface 204 ROM 205 RAM 206 Output interface 207 Vibration sensor and insulation amplifier 208 Alarm

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】動作が加速から減速で完了し、しかも回転
数が運転する度に変動する加減速型回転機械設備に対
し、測定した振動及び回転速度信号を利用して異常診断
を行う方法において、 予め正常状態の回転機械設備で測定した複数回の加速・
減速運転時の複数個のトップ速度における回転数と振動
スペクトルのオーバーオール値、あるいは回転機の原動
機の負荷電流値の関係振動値を標準診断パラメータ値と
して補正式を作成し、 任意のタイミングで測定した振動スペクトルのオーバー
オール値、または回転機械の原動機の負荷電流の所定の
回転速度での値を前記補正式に代入し、基準速度での補
正診断値を求め、 補正診断値をしきい値と比較管理することを特徴とする
加減速型回転機械設備の簡易診断方法。
1. A method for diagnosing abnormality of an acceleration / deceleration type rotating machine equipment whose operation is completed from acceleration to deceleration and whose rotation speed fluctuates every time operation is performed, using measured vibration and rotation speed signals. , Several times of acceleration and
The relationship between the number of rotations and the vibration spectrum at multiple top speeds during deceleration operation, or the relationship between the load current value of the prime mover of the rotating machine The vibration value was created as a standard diagnostic parameter value, and a correction formula was created and measured at any timing Substituting the overall value of the vibration spectrum or the value of the load current of the prime mover of the rotating machine at a predetermined rotation speed into the above-mentioned correction formula, obtaining a correction diagnosis value at a reference speed, and comparing and managing the correction diagnosis value with a threshold value A simple diagnostic method for an acceleration / deceleration type rotary machine equipment, characterized in that:
【請求項2】前記トップ速度における補正式を作成する
に際し、1次ないし2次以上の高次関数、指数関数或い
は対数関数を用いることを特徴とする請求項1記載の加
減速型回転機械設備の簡易診断方法。
2. The acceleration / deceleration type rotary machine equipment according to claim 1, wherein a higher-order function, an exponential function, or a logarithmic function of first or second order or higher is used in preparing the correction formula for the top speed. Simple diagnosis method.
【請求項3】測定した振動及び回転速度信号にノイズ処
理を施した後に、前記トップ速度における補正式を作成
することを特徴とする請求項1ないし2のいずれか1項
に記載の加減速型回転機械設備の簡易診断方法。
3. The acceleration / deceleration type according to claim 1, wherein after performing a noise process on the measured vibration and rotation speed signals, a correction formula for the top speed is created. Simple diagnostic method for rotating machinery.
【請求項4】時系列で表した回転速度の微分値が負の方
向に変動する前の状態で、前記回転数と振動スペクトル
のオーバーオール値、或いは回転機の原動機の負荷電流
値を採取することを特徴とする請求項1〜3のいずれか
1項に記載の加減速型回転機械設備の簡易診断方法。
4. Collecting the overall value of the rotation speed and the vibration spectrum or the load current value of the motor of the rotating machine before the differential value of the rotating speed expressed in time series fluctuates in the negative direction. The simple diagnostic method for an acceleration / deceleration type rotary machine equipment according to any one of claims 1 to 3, characterized in that:
JP10328230A 1998-11-18 1998-11-18 Simple abnormality diagnostic method for acceleration/ deceleration type rotary machine equipment Withdrawn JP2000146771A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10328230A JP2000146771A (en) 1998-11-18 1998-11-18 Simple abnormality diagnostic method for acceleration/ deceleration type rotary machine equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10328230A JP2000146771A (en) 1998-11-18 1998-11-18 Simple abnormality diagnostic method for acceleration/ deceleration type rotary machine equipment

Publications (1)

Publication Number Publication Date
JP2000146771A true JP2000146771A (en) 2000-05-26

Family

ID=18207904

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2000146771A (en)

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