JPH07106076B2 - Diagnostic method and diagnostic device for rotating equipment - Google Patents
Diagnostic method and diagnostic device for rotating equipmentInfo
- Publication number
- JPH07106076B2 JPH07106076B2 JP61245394A JP24539486A JPH07106076B2 JP H07106076 B2 JPH07106076 B2 JP H07106076B2 JP 61245394 A JP61245394 A JP 61245394A JP 24539486 A JP24539486 A JP 24539486A JP H07106076 B2 JPH07106076 B2 JP H07106076B2
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- value
- load current
- rotating equipment
- ratio
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- 238000002405 diagnostic procedure Methods 0.000 title 1
- 230000002159 abnormal effect Effects 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 9
- 238000003745 diagnosis Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000005856 abnormality Effects 0.000 description 17
- 238000005259 measurement Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Landscapes
- Control Of Electric Motors In General (AREA)
- Control Of Conveyors (AREA)
- Protection Of Generators And Motors (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 電動機により駆動される回転設備の異常診断方法に関す
る。The present invention relates to an abnormality diagnosis method for rotating equipment driven by an electric motor.
従来から電動機により駆動される回転設備あるいは電動
機自身の運転状態、異常の有無を確認するために、電動
機負荷電流（以下、負荷電流と略称する）を電流指示
計、記録計などで監視、記録する方法が広く採用されて
いる。Conventionally, in order to confirm the operating condition of the rotating equipment driven by the electric motor or the electric motor itself, and whether there is any abnormality, the electric motor load current (hereinafter abbreviated as load current) is monitored and recorded by a current indicator, recorder, etc. The method is widely adopted.
また、回転設備の異常診断方法として、振動センサーな
どにより振動レベルを測定して異常の有無を判定する振
動法が知られている。Further, as a method for diagnosing an abnormality in rotating equipment, a vibration method is known in which a vibration sensor or the like measures a vibration level to determine whether or not there is an abnormality.
〔発明が解決しようとする問題点〕 しかしながら、従来の方法によると、前者にあつては負
荷電流が電動機の定格電流を越えたときに異常、定格電
流以下のときに正常と判定するものであるから、回転設
備の異常状態がかなり進まないと判らず、従つて初期の
段階で異常を検知することは極めて困難であり、また、
負荷電流が定格電流を越えた場合であつても、回転設備
の異常によるものか、単に過負荷（オーバーロード…異
常とは限らない）によるものか判別は困難で、まして異
常の発生箇所を特定することは全く不可能であつた。[Problems to be Solved by the Invention] However, according to the conventional method, it is determined that the former is abnormal when the load current exceeds the rated current of the motor, and is normal when the load current is less than or equal to the rated current. Therefore, it is not understood that the abnormal state of the rotating equipment does not progress considerably, and therefore it is extremely difficult to detect the abnormality at the initial stage.
Even when the load current exceeds the rated current, it is difficult to determine whether it is due to an abnormality in the rotating equipment or simply due to overload (not always abnormal). It was completely impossible to do.
後者にあつてはボールベアリングの異常等高速回転設備
の異常診断には適しているが測定周波数範囲が5Hz〜40K
Hz程度に限定されており、5Hz以下の低速回転設備の異
常診断を行なうことは極めて困難であつた。The latter is suitable for diagnosing abnormalities in high-speed rotating equipment such as abnormalities in ball bearings, but the measurement frequency range is 5Hz to 40K.
Since it is limited to about Hz, it is extremely difficult to diagnose abnormalities in low-speed rotating equipment below 5 Hz.
本発明はこのような点に鑑みてなされたもので、特にフ
ローコンベア、バケツトコンベアなどの輸送設備、回転
炉（ドライヤー）、撹拌機、ガスエアヒーターなどのギ
ア・チエーン駆動設備等5Hz以下の低速の回転設備に好
適なもので、早期に異常を検知して、異常箇所の推定も
可能な方法および装置を提供することを目的とする。The present invention has been made in view of such a point, and particularly, transportation equipment such as a flow conveyor, a bucket conveyor, a rotary furnace (dryer), a stirrer, a gear / chain drive equipment such as a gas air heater, etc. of 5 Hz or less. An object of the present invention is to provide a method and apparatus suitable for low-speed rotating equipment, capable of detecting an abnormality early and estimating the abnormal portion.
〔問題点を解決するための手段〕 本発明は、周期的に脈動するトルク特性を有する回転設
備の診断に関するもので、設備を駆動する電動機の負荷
電流を測定し、電動機出力に対応する値すなわち負荷電
流、定格電流、電動機出力、あるいはトルクに対する周
期毎の電流振幅値の比を求め、この比の値が正常時上限
の比の値より大きいときに異常と判定するようにしたこ
とを特徴とする。[Means for Solving Problems] The present invention relates to diagnosis of rotating equipment having periodically pulsating torque characteristics, in which load current of an electric motor driving the equipment is measured, and a value corresponding to the electric motor output, that is, It is characterized in that the ratio of the current amplitude value for each cycle to the load current, rated current, motor output, or torque is obtained, and when this ratio value is larger than the ratio value of the normal upper limit, it is judged as abnormal. To do.
より具体的には、前記トルク特性を有する回転設備の負
荷電流を測定するクランプメーターなどの電流変換器と
負荷電流のアナログ量をデイジタル量に変換する信号変
換器と電動機出力に対応する値、負荷電流、定格電流、
電動機出力あるいはトルクなどに対する周期毎の電流振
幅値の比（負荷電流振幅率）を演算する振幅率演算器と
正常時の上限を示す振幅率が入力される設定器と、負荷
電流振幅率と正常時上限の振幅率を比較し、前者の振幅
率が後者のそれより大きい時に異常信号を出力する比較
器とから構成する。More specifically, a current converter such as a clamp meter for measuring the load current of the rotating equipment having the torque characteristic, a signal converter for converting an analog amount of the load current into a digital amount, and a value corresponding to the motor output, the load. Current, rated current,
An amplitude ratio calculator that calculates the ratio of the current amplitude value for each cycle to the motor output or torque (load current amplitude ratio), a setter that inputs the amplitude ratio that indicates the upper limit in normal times, and a load current amplitude ratio and normal It is composed of a comparator which compares the amplitude ratios of the upper limit of time and outputs an abnormal signal when the amplitude ratio of the former is larger than that of the latter.
回転設備の駆動用電動機の電力とトルクとの関係は となり、電力の電流の関係は であるので となり、電動機の負荷率を一定の範囲に限定してか替え
ると電動機効率、力率および伝達効率が一定となりトル
クに比例して電流（負荷電流）、電動機電力が変動す
る。The relationship between the electric power and the torque of the drive motor for rotating equipment is And the relation between the electric current and the electric current is Because Therefore, if the load factor of the electric motor is limited to a certain range and replaced, the electric motor efficiency, the power factor and the transmission efficiency become constant, and the current (load current) and electric motor power fluctuate in proportion to the torque.
従つて回転設備を繰、大する電動機の負荷電流は回転設
備の異常に伴い上昇することが当然予想されるが、設備
の負荷状態によつても変動するため、電流の絶対値だけ
の監視ではその原因を把握することは不可能である。Therefore, it is expected that the load current of a large electric motor will increase due to the abnormality of the rotary equipment as the rotating equipment is repeated.However, since it also fluctuates depending on the load condition of the equipment, it is not possible to monitor only the absolute value of the current. It is impossible to understand the cause.
本発明者は周期的に脈動するトルク特性を有する回転設
備の異常状態に起因するトルク変動がミクロ電流波形と
して現われることを見出し、本発明を完成するに至つた
もので、この電流波形のミクロ的変化を各周期毎の振幅
値として観察すると、負荷電流が定格電流以下であつて
も、回転設備の異常により振幅値が上昇するので異常状
態を捉えることができる。The present inventor has found that torque fluctuation due to an abnormal state of rotating equipment having periodically pulsating torque characteristics appears as a micro current waveform, and has completed the present invention. When the change is observed as an amplitude value for each cycle, even if the load current is less than or equal to the rated current, the amplitude value rises due to the abnormality of the rotating equipment, and thus the abnormal state can be grasped.
ただ、この振幅値は電動機出力の大小、すなわち負荷電
流、定格電流、トルクなどの大小により変動するので、
それに伴つて異常ライン（正常値の上限）も変動する。
この弊害を防ぐために、電動機出力に対応する値（負荷
電流、定格電流、電動機出力あるいはトルクなど）に対
する電流振幅値の比（負荷電流振幅値）を求め、これに
より異常の有無を判定するもので、このようにすると異
常ライン（正常値の上限）を電動機出力の大小にかかわ
らずほぼ一定にすることができる。However, this amplitude value fluctuates depending on the size of the motor output, that is, the load current, rated current, torque, etc.
Along with that, the abnormal line (upper limit of normal value) also fluctuates.
In order to prevent this adverse effect, the ratio of the current amplitude value to the value corresponding to the motor output (load current, rated current, motor output or torque, etc.) (load current amplitude value) is obtained, and the presence or absence of abnormality is determined by this. By doing so, the abnormal line (upper limit of the normal value) can be made substantially constant regardless of the magnitude of the motor output.
以下、図面を参照しながら本発明を詳細に説明する。 Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図は本発明の装置構成を示すシステム構成図で、第
２図はフローコンベアの一部を示す側面図、第３図、第
４図はそれぞれ第１実測例、第２実測例の負荷電流波形
図で（ａ）は正常時、（ｂ）は異常時を示す。FIG. 1 is a system configuration diagram showing an apparatus configuration of the present invention, FIG. 2 is a side view showing a part of a flow conveyor, FIG. 3 and FIG. 4 are loads of a first measurement example and a second measurement example, respectively. In the current waveform diagram, (a) shows a normal state and (b) shows an abnormal state.
第１図により本発明を説明すると、１は回転設備２を駆
動する３相誘導電動機、直流電動機などの電動機、３は
クランプメーターなどの電流検出器で変流器とAC/DCコ
ンバーターからなり、例えば０〜100mVなどの直流電圧
に変換する。この直流電圧が増巾器４により増巾され
て、マイクロコンピユーター５に入力される。マイクロ
コンピユーター５はアナログ量をデイジタル量に変換す
る信号変換器の機能をもつインターフエース６、振幅率
演算器、比較器として機能させる演算処理装置７、負荷
電流のサンプリング値を読み込みストツクするとともに
設定器の機能を有する記憶装置８からなる。負荷電流波
形を記録する記録計９を接続すると、さらに好ましい。The present invention will be described with reference to FIG. 1. Reference numeral 1 is a three-phase induction motor that drives a rotating equipment 2, an electric motor such as a DC motor, and 3 is a current detector such as a clamp meter, which includes a current transformer and an AC / DC converter. For example, it is converted into a DC voltage such as 0 to 100 mV. This DC voltage is amplified by the amplifier 4 and input to the microcomputer 5. The microcomputer 5 is an interface 6 having a function of a signal converter for converting an analog amount into a digital amount, an amplitude ratio calculator, an arithmetic processing unit 7 functioning as a comparator, a sampling value of a load current, and a setter for reading. The storage device 8 has the function of. It is more preferable to connect a recorder 9 for recording the load current waveform.
（実測例１） 回転設備として第２図に示すような100個のリンクチエ
ーン10.10…と歯合輪11.11…11を有するスプロケツトに
より構成さるる粉体を輸送するフローコンベアを診断し
た例を示す。(Measurement Example 1) An example of diagnosing a flow conveyer for transporting powder, which is composed of a sprocket having 100 link chains 10.10 ... and teeth 11.11.
駆動電動機は３相誘導電動機（電圧220V、出力11KW、定
格電流28A）であり、この負荷電流を前記装置により測
定したところ第３図に示すような電流波形を得た。この
負荷は各リンクチエーンに連動した周期的な電流波形を
示しており、その周波数は4.2Hz（１周期約238mSec）で
ある。正常時において第３図（ａ）のような電流波形を
示し、振幅値h1、h2……は1.6A以下、負荷電流は23Aで
あるので、負荷電流振幅率は（1.6/23）×100＝7.0％と
なり、正常時上限の10％以下であつた。The drive motor was a three-phase induction motor (voltage 220V, output 11KW, rated current 28A), and when this load current was measured by the above device, a current waveform as shown in FIG. 3 was obtained. This load shows a periodic current waveform linked to each link chain, and its frequency is 4.2 Hz (one cycle is approximately 238 mSec). In a normal state, the current waveform as shown in Fig. 3 (a) is shown, the amplitude values h 1 , h 2 ... are 1.6 A or less, and the load current is 23 A, so the load current amplitude ratio is (1.6 / 23) × It was 100 = 7.0%, which was below the upper limit of 10% under normal conditions.
同じ設備の運転を継続したところ、スプロケツトに係合
する部分においてリンクチエーンのきしむ音が発生した
ので前記と同様の方法で負荷電流を測定したところ、第
３図（ｂ）に示すような電流波形が得られ、振幅値h1、
h2…は最大4.2Aを示し、負荷電流は24Aであるので負荷
電流振幅率は（4.2/24）×100＝17.5となり製造時上限
の振幅値を大幅に上まわつた。第３図（ｂ）の電流波形
から明らかなように、h1、h2…h100のフローコンベア１
サイクルに相当する振幅値の100個全てが高く、全ての
リンクチエーンの異常が推定されたので、定修時に点検
したところ、リンクチエーン全点にわたり被移送物であ
る製品粉がチエーンに固着してスムーズに曲らない状態
にあつた。そこでリンクチエーン１式を取替えた。取替
後の電流振幅値は６％であつた。When the operation of the same equipment was continued, a squeaking sound of the link chain was generated at the portion engaging with the sprocket, so the load current was measured by the same method as above, and the current waveform as shown in Fig. 3 (b) was obtained. And the amplitude value h 1 ,
h 2 ... shows a maximum of 4.2 A, and since the load current is 24 A, the load current amplitude ratio is (4.2 / 24) × 100 = 17.5, which is significantly higher than the upper limit amplitude value during manufacturing. As is clear from the current waveform of FIG. 3 (b), the flow conveyor 1 of h 1 , h 2 ... h 100
All 100 of the amplitude values corresponding to the cycle were high, and all link chain abnormalities were presumed.Therefore, when inspection was performed during regular repairs, the product powder that was the transferred material stuck to the chain over all link chain points. It was in a state where it did not bend smoothly. So I replaced the Link Chain 1 set. The current amplitude value after replacement was 6%.
この結果から明らかなように本発明によれば負荷電流が
定格電流以下であつても異常診断は勿論、異常箇所の推
定も可能なものである。As is clear from this result, according to the present invention, even if the load current is less than or equal to the rated current, it is possible to perform abnormality diagnosis as well as estimation of an abnormal portion.
なお、本実測例においては電動機出力に対応する値とし
て負荷電流を用いたが、これは本発明によりサンプリン
グ時間20mSec毎に電流値をマイクロコンピユーターに読
み込み、データーを記憶装置にストツクし、フローコン
ベア１サイクルに相当する23.8秒間の平均電流値を演算
装置により求めたものである。また振幅値は20mSec毎に
サンプリングした電流値を基にマイクロコンピユーター
により１周期毎の電流増加時の最大値と最小値の差とし
て求めたものである。In the actual measurement example, the load current was used as a value corresponding to the motor output. However, according to the present invention, the current value is read into the microcomputer every sampling time of 20 mSec, the data is stored in the storage device, and the flow conveyor 1 The average current value for 23.8 seconds corresponding to a cycle is obtained by a computer. Further, the amplitude value is obtained as the difference between the maximum value and the minimum value at the time of increasing the current for each cycle by the micro computer based on the current value sampled every 20 mSec.
また、正常時の上限の振幅率10％は図示しないキーボー
ド等からマイクロコンピユーターに入力され、この設定
値と負荷電流振幅率とを比較して異常時にランプを点灯
したり、警報を出すための異常信号がマイクロコンピユ
ーターから出力される。In addition, the upper limit amplitude ratio of 10% in normal condition is input to the microcomputer from a keyboard not shown, etc., and compared with this set value and the load current amplitude ratio, the abnormal condition for lighting the lamp or issuing an alarm at the abnormal condition. The signal is output from the microcomputer.
さらに、前記の診断において、振幅値、負荷電流振幅率
などのデーターをマイクロコンピユーターから図示しな
いプリンターに出力し、記録した。Further, in the above diagnosis, data such as the amplitude value and the load current amplitude ratio were output from the microcomputer to a printer (not shown) and recorded.
（実測例２） 回転設備としてボイラー設備などに使用される熱交換器
ガスエアーヒーターの診断例を示す。(Measurement example 2) An example of diagnosis of a gas air heater as a heat exchanger used in boiler equipment as rotating equipment is shown.
駆動電動機は３層誘導減速電動機（電圧220V、出力2.2K
W、定格電流8.6A）で、ガスエアーヒーターの８の字型
フードに歯車を介して連結されている。この負荷電流を
測定したところ第４図に示すような電流波形を得た。The drive motor is a 3-layer induction reduction motor (voltage 220V, output 2.2K).
W, rated current 8.6A), connected via a gear to the figure 8 hood of a gas air heater. When this load current was measured, a current waveform as shown in FIG. 4 was obtained.
この負荷は減速電動機と８の字型フードを連結する歯車
に連動した周期的な電流波形を示しており、その周波数
は3.7Hz（１周期約270mSec）である。This load shows a periodic current waveform linked to the gear that connects the reduction motor and the figure-8 hood, and its frequency is 3.7 Hz (1 cycle is about 270 mSec).
第４図（ａ）に示す正常時において、振幅値は最大値0.
5A、負荷電流5.7Aであるので、負荷電流振幅率は（0.5/
5.7）×100＝8.7％となり、正常時上限の振幅率10％以
下であつた。In the normal state shown in FIG. 4 (a), the maximum amplitude value is 0.
Since the load current is 5A and the load current is 5.7A, the load current amplitude ratio is (0.5 /
5.7) x 100 = 8.7%, which was below the upper limit amplitude ratio in normal times of 10%.
同設備の運転を継続したところ回転体の接触音が発生し
たので、負荷電流の測定した。第４図（ｂ）に示すよう
な電流波形が得られ振幅値は最大1.8A、負荷電流は6.5A
であるので負荷電流振幅率は（1.8/6.5）×100＝28％と
なり、正常時上限の振幅値を大巾に上まわつた。When the operation of the equipment was continued, contact noise of the rotating body was generated, so the load current was measured. A current waveform as shown in Fig. 4 (b) is obtained, the maximum amplitude is 1.8A, and the load current is 6.5A.
Therefore, the load current amplitude ratio is (1.8 / 6.5) × 100 = 28%, which is much higher than the normal upper limit amplitude value.
定修時に点検したところ、フード部の異常下降が確認さ
れた。Upon inspection during regular maintenance, an abnormal lowering of the hood was confirmed.
以上、好適な実測例により説明したが、本発明はこれら
に限定されるものではなく、種々の応用が可能である。As described above, the preferred measurement examples have been described, but the present invention is not limited to these, and various applications are possible.
電流検知器はクランプメーター以外にも挿入型の変流
器、既に設けられている変流器などでも使用できるが、
クランプメーターは電動機が運転中の活線路にクランプ
して測定するものであるから、可搬型として最も好適で
ある。The current detector can be used not only with a clamp meter but also with an insertion type current transformer or an existing current transformer.
The clamp meter is the most suitable as a portable type because it is used to measure by clamping the live line of the electric motor in operation.
電動機出力に対応する値としては負荷電流は測定容易で
あり好ましいが、その他前述のように電動機出力、トル
クなども比例関係にあるので採用可能であり、定格電流
も負荷電流と近似している場合には採用しうる。The load current is preferable as a value corresponding to the motor output because it is easy to measure, but it can also be used because the motor output, torque, etc. are in a proportional relationship as described above, and the rated current is close to the load current. Can be used for.
正常時の上限を示す振幅値は電動機出力に対応する値と
して負荷電流を採用した場合、ほぼ10％としてよいが回
転設備が輸送設備以外のものにあつては若干異なること
もあると推定されるが、適宜、設備の状態により選択す
ればよい。また、電動機出力（KW）、トルク（Kg・ｍ）
を採用した場合、10％に代わり、それぞれ30％、1.8％
となる。When the load current is adopted as the value corresponding to the motor output, the amplitude value indicating the upper limit in normal times may be approximately 10%, but it is estimated that there may be some differences when the rotating equipment is something other than transportation equipment. However, it may be appropriately selected depending on the state of the equipment. Also, motor output (KW), torque (Kg · m)
When adopting, instead of 10%, 30% and 1.8% respectively
Becomes
電流振幅値は全振幅値以外にも半振幅値を用いてもよい
ことは勿論である。この場合、電動機出力に対応する値
はそれぞれ1/2とすればよい。また電流振幅値は１周期
毎に求めたが、1/2周期、２周期…毎に求めてもよい。Of course, the current amplitude value may be a half amplitude value other than the full amplitude value. In this case, the values corresponding to the motor output may be set to 1/2. Further, the current amplitude value is obtained every one cycle, but it may be obtained every 1/2 cycle, every two cycles ....
また、本発明においては、電動機出力に対応する値に対
する電流振幅値の比すなわち振幅率で異常の有無を判定
するものであるが、電流振幅値そのものを用い、電動機
出力の大小により正常時の上限値を変動させ、この値と
比較してもよいのは当然であるが、この方法は実質的に
振幅率を求めることに相当し、本発明に包含されるもの
であることは勿論である。In the present invention, the ratio of the current amplitude value to the value corresponding to the motor output, that is, the amplitude ratio is used to determine whether there is an abnormality.However, the current amplitude value itself is used to determine the upper limit of the normal state depending on the magnitude of the motor output. Naturally, the value may be varied and compared with this value, but this method substantially corresponds to the determination of the amplitude ratio, and is of course included in the present invention.
本発明は、電流波形をミクロ的にとらえるものであるか
ら、従来困難とされた輸送設備、回転炉、撹拌機などの
低速回転設備の診断に好適なもので、負荷電流が定格電
流以下であつても早期に異常の有無を診断できるもので
あり、さらに波形の振幅率異常部分をチエツクすること
により異常個所の推定も可能である。INDUSTRIAL APPLICABILITY The present invention, which captures a current waveform microscopically, is suitable for diagnosing low-speed rotating equipment such as transportation equipment, rotary furnaces, agitators, etc., which has been conventionally difficult, and the load current is below the rated current. However, the presence or absence of abnormality can be diagnosed at an early stage, and the abnormal portion can be estimated by checking the abnormal portion of the amplitude ratio of the waveform.
診断装置についても特にクランプメーターなどで構成す
れば、持運びに便利な簡易形とすることができる。If the diagnostic device is also composed of a clamp meter or the like, the diagnostic device can be made simple and convenient to carry.
第１図は本発明の具体的な装置の一例を示すシステム構
成図、第２図はフローコンベアの一部を示す側面図、第
３図、第４図はそれぞれ第１実測例、第２実測例の電流
波形図で、（ａ）は正常時、（ｂ）は異常時を示す。 １……電動機、２……回転設備 ３……電流検出器、５……マイクロコンピユーター ６……インターフエース、７……演算処理装置 ８……記憶装置、９……記録計 10.10…10……リンクチエーンFIG. 1 is a system configuration diagram showing an example of a concrete apparatus of the present invention, FIG. 2 is a side view showing a part of a flow conveyor, and FIGS. 3 and 4 are first measurement example and second measurement example, respectively. In the current waveform diagram of the example, (a) shows a normal state and (b) shows an abnormal state. 1 ... Electric motor, 2 ... Rotating equipment 3 ... Current detector, 5 ... Micro computer 6 ... Interface, 7 ... Arithmetic processing unit 8 ... Storage device, 9 ... Recorder 10.10 ... 10 ... Link Chain
Claims (2)
設備の診断方法において、該設備を駆動する電動機の負
荷電流を測定し、電動機出力に対応する値に対する周期
毎の電流振幅値の比を求め、この比の値を正常時のそれ
と比較して診断するようにしたことを特徴とする回転設
備の診断方法。1. A method for diagnosing rotating equipment having a periodically pulsating torque characteristic, wherein a load current of an electric motor for driving the equipment is measured, and a ratio of a current amplitude value for each cycle to a value corresponding to an electric motor output is measured. The method for diagnosing rotating equipment is characterized in that the value of this ratio is compared with that under normal conditions for diagnosis.
設備の診断装置において、該設備を駆動する電動機の負
荷電流を測定する電流検出器と該電流のアナログ量をデ
イジタル量に変換する信号変換器と電動機出力に対応す
る値に対する周期毎の電流振幅値の比を演算する振幅率
演算器と正常時上限の振幅率が入力される設定器と両者
の振幅率を比較し前者の振幅率が後者のそれより大きい
ときに異常信号を出力する比較器とからなることを特徴
とする回転設備の診断装置。2. A diagnostic device for rotating equipment having periodically pulsating torque characteristics, a current detector for measuring a load current of a motor for driving the equipment, and a signal conversion for converting an analog amount of the current into a digital amount. The amplitude ratio calculator that calculates the ratio of the current amplitude value for each cycle to the value corresponding to the output of the motor and the motor, and the setter to which the amplitude ratio of the upper limit in the normal state is input are compared with the amplitude ratio of the former A diagnostic device for rotating equipment, comprising: a comparator that outputs an abnormal signal when the latter is larger than that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61245394A JPH07106076B2 (en) | 1986-10-17 | 1986-10-17 | Diagnostic method and diagnostic device for rotating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61245394A JPH07106076B2 (en) | 1986-10-17 | 1986-10-17 | Diagnostic method and diagnostic device for rotating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63103688A JPS63103688A (en) | 1988-05-09 |
| JPH07106076B2 true JPH07106076B2 (en) | 1995-11-13 |
Family
ID=17133002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61245394A Expired - Fee Related JPH07106076B2 (en) | 1986-10-17 | 1986-10-17 | Diagnostic method and diagnostic device for rotating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07106076B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3688890B2 (en) * | 1998-05-12 | 2005-08-31 | 新日本製鐵株式会社 | Equipment diagnosis method and equipment diagnosis apparatus for roller table |
| CN116908677B (en) * | 2023-06-06 | 2024-08-30 | 华能上海燃机发电有限责任公司 | Circulating water filter screen on-line monitoring system and method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5651668A (en) * | 1979-10-04 | 1981-05-09 | High Frequency Heattreat Co Ltd | Detecting method for abnormal rotational speed of rotator |
| JPH0646875B2 (en) * | 1983-02-18 | 1994-06-15 | 株式会社日立製作所 | Remote diagnostic device for speed controller |
-
1986
- 1986-10-17 JP JP61245394A patent/JPH07106076B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63103688A (en) | 1988-05-09 |
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