TW201740130A - Abnormality detecting method for rotary machine system, abnormality monitoring method for rotary machine system using the abnormality detecting method, and abnormality monitoring device for rotary machine system using the abnormality monitoring method - Google Patents

Abnormality detecting method for rotary machine system, abnormality monitoring method for rotary machine system using the abnormality detecting method, and abnormality monitoring device for rotary machine system using the abnormality monitoring method Download PDF

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TW201740130A
TW201740130A TW106109518A TW106109518A TW201740130A TW 201740130 A TW201740130 A TW 201740130A TW 106109518 A TW106109518 A TW 106109518A TW 106109518 A TW106109518 A TW 106109518A TW 201740130 A TW201740130 A TW 201740130A
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frequency
current
abnormality
induction motor
deterioration
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TWI605259B (en
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劉信芳
馮芳
中村孝博
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高田工業所股份有限公司
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring

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  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
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Abstract

A simple diagnostic of a rotary mechanical system is performed involving: a first step for performing a fast Fourier transform on an operation-time current signal of a three-phase induction motor; a second step in which the sidebands of the current spectrum peak of the power frequency, present at frequency positions centered on the current spectrum peak of the power frequency and separated from each other to the lower-frequency side and to the higher-frequency side by a characteristic frequency interval related with abnormalities in the rotary mechanical system, are extracted from the obtained current spectrum, and the current spectrum peak value is calculated from one or both sidebands; a third step in which a deterioration parameter of the rotary mechanical system is calculated from the current spectrum peak values of the power source frequency and the sidebands; and a fourth step in which the value of the deterioration parameter is recorded and is compared with a deterioration criterion value to detect abnormalities in the rotary mechanical system.

Description

旋轉機械系統之異常檢測方法、使用該異常檢測方法之旋轉機械系統的異常監視方法、及使用該異常監視方法之旋轉機械系統的異常監視裝置Abnormality detecting method of rotating machine system, abnormality monitoring method of rotating machine system using the abnormality detecting method, and abnormality monitoring device of rotating machine system using the abnormality monitoring method

本發明是涉及從身為旋轉機械系統之驅動源之三相感應電動機之運作時電流訊號之狀態來檢測旋轉機械系統之異常之旋轉機械系統之異常檢測方法、使用該異常檢測方法之旋轉機械系統的異常監視方法、及使用該異常監視方法之旋轉機械系統的異常監視裝置。The present invention relates to an abnormality detecting method for a rotating mechanical system for detecting an abnormality of a rotating mechanical system from a state of a current signal during operation of a three-phase induction motor as a driving source of a rotating mechanical system, and a rotating mechanical system using the abnormal detecting method The abnormality monitoring method and the abnormality monitoring device of the rotary machine system using the abnormality monitoring method.

關於利用感應電動機之電流訊號特徴解析(MCSA：Motor Current Signature Analysis)來進行之旋轉機械系統之異常診斷方法，舉例來說，在專利文獻1已揭示到：測量旋轉機械系統之感應電動機之運作時電流訊號，使用從該波形求得之振幅機率密度函數之資訊量KI作為參數，而進行旋轉機械系統之異常測量。然後，要只靠一種類的參數來代表旋轉機械系統之狀態並不容易，會有無法用在精密診斷以進行在旋轉機械系統發生之異常種類之識別及異常部位之辨識。在此，利用感應電動機之電流訊號特徴解析進行之旋轉機械系統之精密診斷是求出對感應電動機之運作時電流訊號進行FFT轉換(高速傅立葉轉換)所獲得之譜型之特徴(識別譜型)。 先行技術文獻 專利文獻Regarding the abnormality diagnosis method of the rotary mechanical system using the current signal signature analysis (MCSA) of the induction motor, for example, Patent Document 1 discloses that when measuring the operation of the induction motor of the rotary mechanical system The current signal is subjected to an abnormality measurement of the rotary mechanical system using the information amount KI of the amplitude probability density function obtained from the waveform as a parameter. Then, it is not easy to represent the state of the rotating mechanical system by only one type of parameter, and it is impossible to use it for precise diagnosis to identify the abnormal type and abnormal part of the rotating mechanical system. Here, the precise diagnosis of the rotating mechanical system using the current signal characteristic analysis of the induction motor is to obtain the characteristic of the spectrum obtained by performing FFT conversion (fast Fourier transform) on the current signal of the induction motor (identification spectrum type). . Advanced technical literature

專利文獻1：日本特許第5733913號公報Patent Document 1: Japanese Patent No. 5733913

發明欲解決之課題 然而，要從感應電動機之運作時電流訊號之譜型來診斷感應電動機之狀態會需要相當程度之與在旋轉機械系統發生之異常相關之理論知識、及旋轉機械系統之現場經驗，故有著即便對一旋轉機械系統亦容易發生診斷結果不一之問題。 再者，即便可從感應電動機之運作時電流訊號之譜型來識別異常種類，亦有著如下問題：無法獲得關於與在旋轉機械系統發生之異常之程度對應之處置之資訊(例如，將發生異常之機器立即更換(交換)、或需要修補、或暫時先觀察後續發展即可等)，欠缺實用性。The problem to be solved by the invention However, to diagnose the state of the induction motor from the spectrum of the current signal during the operation of the induction motor requires considerable theoretical knowledge related to the abnormality occurring in the rotating mechanical system and the field experience of the rotating mechanical system. Therefore, there is a problem that the diagnosis result is not easy even for a rotating mechanical system. Furthermore, even if the abnormal type can be identified from the spectrum of the current signal during operation of the induction motor, there is a problem that information about the treatment corresponding to the degree of abnormality occurring in the rotating mechanical system cannot be obtained (for example, an abnormality will occur). The machine is immediately replaced (exchanged), or needs to be repaired, or temporarily observed for subsequent development, etc.), lacking practicality.

本發明是鑑於如此之事情而建構，其目的是提供從身為旋轉機械系統之驅動源之三相感應電動機之運作時電流訊號之狀態來檢測旋轉機械系統之異常之旋轉機械系統之異常檢測方法、使用該異常檢測方法之旋轉機械系統的異常監視方法、及使用該異常監視方法之旋轉機械系統的異常監視裝置。 用以解決課題之手段The present invention has been made in view of such circumstances, and an object thereof is to provide an abnormality detecting method for detecting an abnormal rotating mechanical system of a rotating mechanical system from a state of a current signal during operation of a three-phase induction motor as a driving source of a rotating mechanical system. An abnormality monitoring method of a rotating machine system using the abnormality detecting method, and an abnormality monitoring device of a rotating machine system using the abnormality monitoring method. Means to solve the problem

遵循前述目的之與第1發明相關之旋轉機械系統之異常檢測方法是從三相感應電動機之運作時電流訊號之解析結果，檢測出發生在以該三相感應電動機作為驅動源之旋轉機械系統之異常的旋轉機械系統之異常檢測方法，進行包含以下步驟之簡易診斷： 第1步驟，量測前述三相感應電動機之運作時電流訊號，進行該運作時電流訊號之高速傅立葉轉換； 第2步驟，從藉由前述高速傅立葉轉換而獲得之電流譜中，抽出存在於以前述三相感應電動機之電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開一特徴頻率之頻率位置的前述電源頻率之電流譜峰的邊帶波(參考圖5)，並求出前述邊帶波之任一者或雙方之電流譜峰值，其中該特徵頻率與前述旋轉機械系統之異常相關； 第3步驟，使用在前述第2步驟所求出之前述邊帶波之電流譜峰值及前述電源頻率之電流譜峰之峰值，算出前述旋轉機械系統之劣化參數； 第4步驟，記錄前述劣化參數之值，並將該劣化參數之值與事先設定之劣化判定基準值相比較，根據該劣化參數之值已達前述劣化判定基準值之情形而檢測出異常。The abnormality detecting method of the rotating machine system according to the first aspect of the present invention is the result of analyzing the current signal during operation of the three-phase induction motor, and detecting the occurrence of the rotating mechanical system using the three-phase induction motor as a driving source. The abnormality detecting method of the abnormal rotating mechanical system performs a simple diagnosis including the following steps: In the first step, measuring the current signal of the three-phase induction motor during operation, and performing the high-speed Fourier transform of the current signal during the operation; In the current spectrum obtained by the above-described fast Fourier transform, the aforementioned frequency position which is separated from the current spectrum peak of the power supply frequency of the three-phase induction motor as a center and which is separated from the low frequency side and the high frequency side by a special frequency is extracted. a sideband wave of a current spectrum peak of the power supply frequency (refer to FIG. 5), and determining a current spectrum peak of either or both of the sideband waves, wherein the characteristic frequency is related to an abnormality of the rotating mechanical system; Using the peak of the current spectrum of the sideband wave obtained in the second step and the power of the power source frequency The peak value of the peak is calculated, and the deterioration parameter of the rotating machine system is calculated. In the fourth step, the value of the deterioration parameter is recorded, and the value of the deterioration parameter is compared with a previously determined deterioration determination reference value, and the value of the degradation parameter is reached according to the value of the degradation parameter. An abnormality is detected in the case of the deterioration determination reference value described above.

遵循前述目的之與第2發明相關之旋轉機械系統的異常監視方法是組合了與第1發明相關之旋轉機械系統之異常檢測方法之任1者或2者以上之旋轉機械系統的異常監視方法，包含： 劣化傾向管理步驟，反覆進行複數之前述簡易診斷； 精密異常診斷步驟，當複數之前述簡易診斷之至少其中一者檢測到異常時，基於達到前述劣化判定基準值之前述劣化參數而辨識出異常之種類與在前述旋轉機械系統中之異常部位。The abnormality monitoring method of the rotary machine system according to the second aspect of the present invention is an abnormality monitoring method of the rotary machine system in which one or more of the abnormality detecting methods of the rotating machine system according to the first aspect of the invention are combined. The method includes: a deterioration tendency management step of repeatedly performing the simple diagnosis of the plurality of times; and a precision abnormality diagnosis step of recognizing the deterioration parameter based on the deterioration determination reference value when at least one of the plurality of simple diagnoses detects an abnormality The type of abnormality and the abnormal part in the aforementioned rotating mechanical system.

遵循前述目的之與第3發明相關之旋轉機械系統的異常診斷裝置是使用在與第2發明相關之旋轉機械系統的異常監視方法之旋轉機械系統的異常監視裝置，包含： 劣化參數算出部，從前述三相感應電動機之運作時電流訊號求出前述劣化參數； 簡易異常診斷部，記錄前述劣化參數之值，並將該劣化參數之值與前述劣化判定基準值相比較； 精密異常診斷部，當藉由前述簡易異常診斷部而於前述旋轉機械系統檢測到異常時，基於已達前述劣化判定基準值之前述劣化參數，而辨識出異常之種類與在前述旋轉機械系統中之異常部位。 發明效果The abnormality diagnostic device of the rotary machine system according to the third aspect of the invention is the abnormality monitoring device of the rotary machine system using the abnormality monitoring method of the rotary machine system according to the second aspect of the invention, and includes: a deterioration parameter calculation unit; The current signal during the operation of the three-phase induction motor obtains the deterioration parameter; the simple abnormality diagnosis unit records the value of the deterioration parameter, and compares the value of the deterioration parameter with the deterioration determination reference value; When the abnormality is detected by the rotating machine system, the simple abnormality diagnosing unit recognizes the type of abnormality and the abnormal portion in the rotating machine system based on the deterioration parameter that has reached the deterioration determination reference value. Effect of the invention

與本發明相關之與第1發明之旋轉機械系統之異常檢測方法、與第2發明相關之旋轉機械系統的異常監視方法、及與第3發明相關之旋轉機械系統的異常診斷裝置是從對身為旋轉機械系統之驅動源之三相感應電動機之運作時電流訊號進行高速傅立葉轉換所獲得之電流譜中，抽出與旋轉機械系統之異常相關之特徴頻率之邊帶波而算出旋轉機械系統之劣化參數之值，與劣化判定基準值進行比較，藉此檢測異常，故可不受是否具有與在旋轉機械系統發生之異常相關之理論知識、是否具有旋轉機械系統之維護經驗所影響而正確地辨識出旋轉機械系統之異常部位(發生異常之機器)。 而且，由於旋轉機械系統之異常之狀態是以劣化參數之值而顯示，故可執行與在旋轉機械系統(機器)發生之異常之程度對應之處置(例如，將發生異常之機器立即更換(交換)、或需要補修、或暫時先觀察後續發展即可等)。The abnormality detecting method of the rotating machine system according to the first aspect of the present invention, the abnormality monitoring method of the rotating machine system according to the second aspect of the invention, and the abnormality diagnosing device of the rotating machine system according to the third aspect of the present invention are In the current spectrum obtained by the high-speed Fourier transform of the current signal during operation of the three-phase induction motor of the driving source of the rotating mechanical system, the sideband wave of the characteristic frequency associated with the abnormality of the rotating mechanical system is extracted to calculate the deterioration of the rotating mechanical system. The value of the parameter is compared with the deterioration determination reference value, thereby detecting the abnormality, so that it can be correctly recognized without being affected by the theoretical knowledge related to the abnormality occurring in the rotating mechanical system or the maintenance experience of the rotating mechanical system. An abnormal part of the rotating mechanical system (machine where an abnormality occurs). Moreover, since the abnormal state of the rotary machine system is displayed by the value of the deterioration parameter, the treatment corresponding to the degree of abnormality occurring in the rotary machine system (machine) can be performed (for example, the machine in which the abnormality occurs is immediately replaced (exchanged) ), or need to repair, or temporarily observe the subsequent development can wait).

用以實施發明之形態 接下來，一面參考附加之圖面、一面說明將本發明具體化之實施形態，以促進理解本發明。 如圖1所示，與本發明之一實施形態相關之旋轉機械系統的異常監視裝置10具有：劣化參數算出部13，從身為旋轉機械系統11之驅動源之三相感應電動機12之運作時電流訊號之解析結果求出劣化參數，該劣化參數是將旋轉機械系統11之總合狀態、因為旋轉機械系統11之機械構造而發生之個別狀態分別定量地評價；簡易異常診斷部14，將劣化參數之值記錄，並將求出之劣化參數之值與劣化判定基準值比較；精密異常診斷部15，當在簡易異常診斷部14檢測到旋轉機械系統11異常時，基於達到劣化判定基準值之劣化參數而辨識異常之種類與旋轉機械系統11之異常部位。以下，進行詳細說明。MODE FOR CARRYING OUT THE INVENTION The embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, the abnormality monitoring device 10 of the rotary machine system according to an embodiment of the present invention includes a deterioration parameter calculation unit 13 and operates from a three-phase induction motor 12 that is a drive source of the rotary machine system 11. The deterioration parameter is obtained by quantitatively evaluating the total state of the rotary machine system 11 and the individual state of the rotary machine system 11 by the analysis result of the current signal; the simple abnormality diagnosis unit 14 will deteriorate The value of the parameter is recorded, and the value of the obtained deterioration parameter is compared with the deterioration determination reference value. When the simple abnormality diagnosis unit 14 detects that the rotary machine system 11 is abnormal, the precision abnormality diagnosis unit 15 determines that the deterioration determination reference value is reached. The type of the abnormality and the abnormal portion of the rotary mechanical system 11 are identified by the deterioration parameter. The details will be described below.

劣化參數算出部13具有：電流測量器16(例如夾式電流感測器)，測量在將電力從旋轉機械系統11之電氣室(控制盤)朝三相感應電動機12供給之三相各自之電源纜線12a流動之運作時電流訊號；A/D轉換器17，將以電流測量器16測定之運作時電流訊號轉換成數位訊號；處理單元18，對從A/D轉換器17輸出之運作時電流訊號進行處理。The deterioration parameter calculation unit 13 includes a current measuring device 16 (for example, a clip-on current sensor) that measures the respective power sources of three phases that supply electric power from the electric chamber (control panel) of the rotary machine system 11 to the three-phase induction motor 12. The current signal of the operation of the cable 12a; the A/D converter 17 converts the current signal measured by the current measuring device 16 into a digital signal; and the processing unit 18 operates the output from the A/D converter 17. The current signal is processed.

而且，在處理單元18設有：電流資訊量算出手段19，算出身為對旋轉機械系統11之狀態進行總合評價之劣化參數之電流資訊量KI；電流有效值算出手段20，算出身為對旋轉機械系統11之負載變動狀況進行評價之劣化參數之電流有效值Irms ；3相電流平衡算出手段21，算出身為對電源品質或三相感應電動機12之定子及反向器之劣化狀況進行評價之劣化參數之運作時電流訊號之3相電流平衡Iub ；電流單諧波比率算出手段22，算出身為對電源品質或三相感應電動機12之定子及反向器之劣化狀況進行評價之劣化參數之運作時電流訊號之電流單諧波比率idis ；電流總諧波比率算出手段23，算出身為對電源品質或三相感應電動機12之定子及反向器之劣化狀況進行評價之劣化參數之運作時電流訊號之電流總諧波比率Idis 。在此，處理單元18更設有對從A/D轉換器17輸出之運作時電流訊號進行高速傅立葉轉換(頻率解析之一例)之高速傅立葉轉換器24，從高速傅立葉轉換器24輸出之譜資料(顯示頻率與對數轉換後之電流譜之關係的資料)輸入至電流單諧波比率算出手段22與電流總諧波比率算出手段23。 附帶一提，電流資訊量KI、電流有效值Irms 、3相電流平衡Iub 、電流單諧波比率idis 、及電流總諧波比率Idis 之各劣化參數(將該等劣化參數總稱為第1種劣化參數)之值具有會隨著旋轉機械系統11之劣化進展而上昇之特徴。Further, the processing unit 18 is provided with a current information amount calculation means 19 for calculating a current information amount KI which is a deterioration parameter for collectively evaluating the state of the rotary machine system 11, and a current effective value calculation means 20 for calculating the body right The current effective value I rms of the deterioration parameter evaluated by the load fluctuation state of the rotary machine system 11 is calculated by the three-phase current balance calculation means 21, and the deterioration state of the stator and the inverter of the three-phase induction motor 12 is calculated. The 3-phase current balance I ub of the current signal during the operation of the deterioration parameter of the evaluation; the current single-harmonic ratio calculation means 22 calculates the deterioration of the stator and the inverter of the three-phase induction motor 12 as the power quality. The current single harmonic ratio i dis of the current signal during the operation of the deterioration parameter; the current total harmonic ratio calculating means 23 calculates the deterioration which is the evaluation of the deterioration of the power supply quality or the stator and the inverter of the three-phase induction motor 12 The current total harmonic ratio I dis of the current signal during the operation of the parameter. Here, the processing unit 18 further includes a fast Fourier transformer 24 that performs fast Fourier transform (an example of frequency analysis) on the current signal output from the A/D converter 17, and outputs spectral data from the fast Fourier converter 24. (data on the relationship between the display frequency and the logarithmically converted current spectrum) is input to the current single harmonic ratio calculating means 22 and the current total harmonic ratio calculating means 23. Incidentally, each of the degradation parameters of the current information amount KI, the current effective value I rms , the 3-phase current balance I ub , the current single harmonic ratio i dis , and the current total harmonic ratio I dis (the deterioration parameters are collectively referred to as The value of the first deterioration parameter has a characteristic that rises as the deterioration of the rotary machine system 11 progresses.

在此，電流資訊量算出手段19是當將從正常狀態之運作時電流訊號之波形求出之振幅機率密度分布定義成參考分布、將監視狀態之運作時電流訊號之振幅機率密度分布定義成測試分布的情況下，以振幅x之電流訊號之參考分布與測試分布分別當作fr (x)、ft (x)，對由fr (x)log[fr (x)/ft (x)]所成之評價式在-∞至∞之範圍進行x積分，藉此求出電流資訊量KI。附帶一提，關於正常狀態之運作時電流訊號，可使用三相感應電動機12之額定電流之正弦波訊號波形。 電流有效值算出手段20是以i當作運作時電流訊號之取樣值、以N當作取樣點數量，而從{(i1 2 +i2 2 +...+iN 2 )/N}1/2 求出電流有效值Irms 。Here, the current information amount calculating means 19 defines the amplitude probability density distribution obtained from the waveform of the current signal during the operation of the normal state as the reference distribution, and defines the amplitude probability density distribution of the current signal during the operation of the monitoring state as the test. In the case of distribution, the reference distribution and the test distribution of the current signal with amplitude x are taken as f r (x), f t (x), respectively, and by f r (x)log[f r (x)/f t ( x)] The evaluation formula is x-integrated in the range of -∞ to ,, thereby obtaining the current information amount KI. Incidentally, regarding the current signal during normal operation, a sinusoidal signal waveform of the rated current of the three-phase induction motor 12 can be used. The current effective value calculation means 20 takes i as the sampling value of the current signal at the time of operation, and uses N as the number of sampling points, and from {(i 1 2 + i 2 2 +...+i N 2 )/N} 1/2 find the current effective value I rms .

另外，將運作時電流3相同時量測之情況下之3相電流平衡算出手段21是將運作時電流訊號之3相之電流有效值Iu 、Iv 、Iw 中之最大值與最小值之差max(Iu ,Iv ,Iw )-min(Iu ,Iv ,Iw )除以最大值與最小值之和max(Iu ,Iv ,Iw )+min(Iu ,Iv ,Iw )，藉此求出3相電流平衡Iub 。 電流單諧波比率算出手段22是在運作時電流訊號之諧波有效值中，將事先設定之次數n內之最大值maxin 除以運作時電流訊號之電源頻率有效值I1 ，藉此求出電流單諧波比率idis 。 電流總諧波比率算出手段23是將運作時電流訊號之到事先設定之次數n為止之各諧波有效值之平方和之平方根(I2 2 +I3 2 +...+In 2 )1/2 除以運作時電流訊號之電源頻率有效值I1 ，藉此求出電流總諧波比率Idis 。In addition, the 3-phase current balance calculation means 21 in the case where the current 3 is the same at the time of operation is the maximum value and the minimum value of the current effective values I u , I v , I w of the three phases of the current signal during operation. The difference max(I u , I v , I w )-min(I u , I v , I w ) is divided by the sum of the maximum value and the minimum value max(I u , I v , I w )+min(I u , I v , I w ), thereby obtaining a 3-phase current balance I ub . The current single harmonic ratio calculating means 22 divides the maximum value maxi n of the number n set in advance by the power source frequency effective value I 1 of the current signal during operation in the harmonic effective value of the current signal during operation. The current single harmonic ratio i dis . The current total harmonic ratio calculating means 23 is the square root of the sum of the rms values of the respective harmonics up to the preset number of times n of the current signal during operation (I 2 2 + I 3 2 + ... + I n 2 ) The 1/2 is divided by the power supply frequency effective value I 1 of the current signal during operation, thereby obtaining the current total harmonic ratio I dis .

另外，處理單元18具有：軸系電流比率算出手段25，使用從高速傅立葉轉換器24獲得之將電流譜對數轉換所形成之譜資料(顯示頻率與對數轉換後之電流譜之關係的資料)，算出身為對旋轉機械系統11之旋轉機械軸系之負載狀況進行評價之劣化參數之軸系電流比率Lshaft ；極通過電流比率算出手段26，算出對三相感應電動機12之轉子之劣化狀況進行評價之極通過電流比率Lpole ；轉子轉差電流比率算出手段27，算出身為對三相感應電動機12之負載扭矩與轉子之實際旋轉數之變化進行推測之劣化參數之轉子轉差電流比率Lrs ；葉片通過電流比率算出手段28，當藉由三相感應電動機12驅動之旋轉機械系統11是流體旋轉機械的情況下，算出身為對設在流體旋轉機械之葉片及殼體之磨耗、腐蝕之發生狀況進行推測之劣化參數之葉片通過電流比率Lbp 。Further, the processing unit 18 has a shaft current ratio calculating means 25 that uses spectral data (data of a relationship between a display frequency and a logarithmically converted current spectrum) obtained by logarithmically converting a current spectrum obtained from the fast Fourier transformer 24, The shaft current ratio L shaft which is a deterioration parameter for evaluating the load state of the rotary machine shaft system of the rotary machine system 11 is calculated, and the pole current ratio calculation means 26 calculates the deterioration state of the rotor of the three-phase induction motor 12. The evaluation pole passing current ratio L pole and the rotor slip current ratio calculating means 27 calculate the rotor slip current ratio L which is a deterioration parameter which estimates the change in the load torque of the three-phase induction motor 12 and the actual number of revolutions of the rotor. The blade passes the current ratio calculating means 28, and when the rotating mechanical system 11 driven by the three-phase induction motor 12 is a fluid rotating machine, the wear and corrosion of the blade and the casing provided in the fluid rotating machine are calculated. The blade passing current ratio L bp of the deterioration parameter estimated by the occurrence condition.

再者，處理單元18設有：咬合電流比率算出手段29，當藉由三相感應電動機12驅動之旋轉機械系統11是齒輪裝置的情況下(在三相感應電動機12之轉子之旋轉軸所安裝之齒輪之一例)，算出身為對齒輪之磨耗、潤滑不佳、折損等異常進行推測之劣化參數之咬合電流比率Lgz ；齒極電流比率算出手段29a，算出身為對齒輪之磨耗、潤滑不佳、折損等異常進行推測之劣化參數之齒極電流比率Lgp ；皮帶旋轉電流比率算出手段30，當藉由三相感應電動機12驅動之旋轉機械系統11是滑輪皮帶驅動系統的情況下(在三相感應電動機12之轉子之旋轉軸所安裝之滑輪之一例)，算出身為對滑輪之未對準與皮帶之鬆緊度之異常進行推測之劣化參數之皮帶旋轉電流比率Lbr 。 附帶一提，軸系電流比率Lshaft 、極通過電流比率Lpole 、轉子轉差電流比率Lrs 、葉片通過電流比率Lbp 、咬合電流比率Lgz 、齒極電流比率Lgp 、及皮帶旋轉電流比率Lbr 之各劣化參數(將該等劣化參數總稱為第2種劣化參數)之值具有會隨著旋轉機械系統11之劣化進展而降低之特徴。Further, the processing unit 18 is provided with a nip current ratio calculating means 29, and when the rotary mechanical system 11 driven by the three-phase induction motor 12 is a gear device (installed on the rotating shaft of the rotor of the three-phase induction motor 12) In one example of the gear, the occlusion current ratio L gz which is a deterioration parameter which is estimated to be an abnormality such as wear, poor lubrication, and breakage of the gear is calculated. The tooth current ratio calculation means 29a calculates the wear and lubrication of the gear. The tooth current ratio L gp of the deterioration parameter estimated by the abnormality, the damage, and the like; the belt rotation current ratio calculating means 30, when the rotary machine system 11 driven by the three-phase induction motor 12 is the pulley belt drive system ( In the case of one of the pulleys to which the rotating shaft of the rotor of the three-phase induction motor 12 is attached, the belt rotation current ratio L br which is a deterioration parameter for estimating the misalignment of the pulley and the degree of tightness of the belt is calculated. Incidentally, the shafting current ratio L shaft , the pole passing current ratio L pole , the rotor slip current ratio L rs , the blade passing current ratio L bp , the nip current ratio L gz , the tooth current ratio L gp , and the belt rotating current The values of the respective deterioration parameters of the ratio L br (which are collectively referred to as the second degradation parameters) have characteristics that decrease as the deterioration of the rotary machine system 11 progresses.

在此，軸系電流比率算出手段25是從譜資料求出既是電源頻率之電流譜峰(電源基本頻率之電流譜峰或電源諧波頻率之電流譜峰)之邊帶波、亦是起因於三相感應電動機12之實際旋轉頻率之邊帶波、亦即在以電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開實際旋轉頻率之頻率位置所存在之邊帶波之其中一方之峰值、例如最大峰高度20logIshaft 、與電源頻率之電流譜峰之峰高度20logIline ，將軸系電流比率Lshaft 以20logIline -20logIshaft 、亦即20log(Iline /Ishaft )而評價。在此，Ishaft 及Iline 分別是從高速傅立葉轉換器24輸出之起因於實際旋轉頻率之邊帶波及電源頻率之電流譜之峰值。Here, the shaft current ratio calculating means 25 obtains a sideband wave which is a current spectrum peak of the power source frequency (current spectrum peak of the power source fundamental frequency or current spectrum peak of the power source harmonic frequency) from the spectral data, and is also caused by The sideband wave of the actual rotation frequency of the three-phase induction motor 12, that is, the sideband wave existing at the frequency position which is separated from the actual rotation frequency toward the low frequency side and the high frequency side with the current spectrum peak of the power supply frequency as the center. The peak value of one side, for example, the maximum peak height of 20 log I shaft , and the peak height of the current peak of the power supply frequency is 20 log I line , and the shaft current ratio L shaft is evaluated by 20 log I line -20 log I shaft , that is, 20 log (I line /I shaft ). Here, the I shaft and the I line are the peaks of the current spectrum of the sideband wave and the power supply frequency which are output from the fast Fourier transformer 24 due to the actual rotational frequency.

極通過電流比率算出手段26是從譜資料求出既是電源頻率之電流譜峰之邊帶波、亦是起因於三相感應電動機12之極通過頻率之邊帶波、亦即在以電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開極通過頻率之頻率位置所存在之邊帶波之其中一方之峰值、例如最大峰值20logIpole (Ipole 是從高速傅立葉轉換器24輸出之起因於極通過頻率之邊帶波之電流譜之峰值)、與電源頻率之電流譜峰之峰高度20logIline ，將極通過電流比率Lpole 以20logIline -20logIpole 、亦即20log(Iline /Ipole )而評價。The pole passing current ratio calculating means 26 obtains a sideband wave which is a current spectrum peak of the power source frequency from the spectral data, or a sideband wave which is caused by the pole passing frequency of the three-phase induction motor 12, that is, a current at a power source frequency The peak of the peak is one of the sidebands of the frequency at the frequency position, for example, the maximum peak value of 20 logI pole (I pole is the origin of the output from the fast Fourier transformer 24). The peak of the current spectrum of the band passing the frequency of the pole passing through the frequency, and the peak height of the current peak of the power supply frequency is 20logI line , and the pole passing current ratio L pole is 20logI line -20logI pole , that is, 20log (I line /I pole ) and evaluate.

轉子轉差電流比率算出手段27是從譜資料求出既是電源頻率之電流譜峰之邊帶波、亦是起因於三相感應電動機12之轉子導條轉差頻率之邊帶波、亦即在以電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開轉子導條轉差頻率之頻率位置所存在之邊帶波之其中一方之峰值、例如、最大峰值20logIrs (Irsole 是從高速傅立葉轉換器24輸出之起因於轉子導條轉差頻率之邊帶波之電流譜之峰值)、與電源頻率之電流譜峰之峰高度20logIline ，將轉子轉差電流比率Lrs 以20logIline -20logIrs 、亦即20log(Iline /Irs )而評價。The rotor slip current ratio calculating means 27 obtains a sideband wave which is a current spectrum peak of the power source frequency or a sideband wave which is caused by the rotor bar slip frequency of the three-phase induction motor 12 from the spectral data, that is, The current spectrum peak of the power supply frequency as the center and the peak of one of the sideband waves existing at the frequency position of the rotor bar slip frequency toward the low frequency side and the high frequency side, respectively, for example, the maximum peak value of 20 log I rs (I rsole is from The output of the fast Fourier transformer 24 is due to the peak of the current spectrum of the sideband of the rotor bar slip frequency, and the peak height of the current peak of the power supply frequency is 20 logI line , and the rotor slip current ratio L rs is 20 logI line - 20 log I rs , that is, 20 log (I line /I rs ) was evaluated.

葉片通過電流比率算出手段28是從譜資料求出既是電源頻率之電流譜峰之邊帶波、亦是起因於三相感應電動機12之葉片通過頻率之邊帶波、亦即在以電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開葉片通過頻率之頻率位置所存在之邊帶波之其中一方之峰值、例如最大峰值20logIbp (Ibp 是從高速傅立葉轉換器24輸出之起因於葉片通過頻率之邊帶波之電流譜之峰值)、與電源頻率之電流譜峰之峰高度20logIline ，將葉片通過電流比率Lbp 以20logIline -20logIbp 、亦即20log(Iline /Ibp )而評價。The blade passing current ratio calculating means 28 obtains a sideband wave which is a current spectrum peak of the power source frequency from the spectral data, and also a sideband wave which is caused by the blade passing frequency of the three-phase induction motor 12, that is, a current at the power source frequency. peak as a center, respectively, away from the blade toward the low frequency side and high frequency side of the peak which one sideband wave of the frequency of the frequency position of the presence of, for example, the maximum peak 20logI bp (I bp is the cause of the high-speed Fourier converter 24 from the output of The peak of the current spectrum of the band passing the frequency of the blade passing through the frequency, and the peak height of the current peak of the power supply frequency is 20logI line , and the blade passing current ratio L bp is 20logI line -20logI bp , that is, 20log (I line /I bp ) and evaluate.

咬合電流比率算出手段29是從譜資料求出既是電源頻率之電流譜峰之邊帶波、亦是起因於三相感應電動機12之咬合頻率之邊帶波、亦即在以電源頻率之電流譜峰作為中心而朝低頻側及高頻側分別離開咬合頻率之頻率位置所存在之邊帶波之其中一方之峰值、例如最大峰值20logIgz (Igz 是從高速傅立葉轉換器24輸出之起因於咬合頻率之邊帶波之電流譜之峰值)、與電源頻率之電流譜峰之峰高度20logIline ，將咬合電流比率Lgz 以20logIline -20logIgz 、亦即20log(Iline /Igz )而評價。 另外，齒極電流比率算出手段29a是從譜資料求出既是電源頻率之電流譜峰之邊帶波、亦是起因於三相感應電動機12之齒極頻率之邊帶波、亦即在以電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開齒極頻率fgp (齒極頻率fgp 是以三相感應電動機12之極通過頻率與在三相感應電動機12之轉子之旋轉軸所安裝之齒輪之齒數的積而定義)之頻率位置所存在之邊帶波之其中一方之峰值、例如最大峰值20logIgp (Igp 是從高速傅立葉轉換器24輸出之起因於齒極頻率之邊帶波之電流譜之峰值)、與電源頻率之電流譜峰之峰高度20logIline ，將齒極電流比率Lgp 以20logIline -20logIgp 、亦即20log(Iline /Igp )而評價。The occlusion current ratio calculating means 29 obtains a sideband wave which is a current spectrum peak of the power supply frequency from the spectral data, or a sideband wave which is caused by the occlusion frequency of the three-phase induction motor 12, that is, a current peak at the power supply frequency. as a center toward the low frequency side and high frequency side, respectively, away from the peak of the sideband wave in which one of the present frequency of the frequency position of engagement, such as a maximum peak 20logI gz (I gz cause the output from the Fast Fourier frequency converter 24 to the nip The peak of the current spectrum with the wave side, and the peak height of the current spectrum peak of the power supply frequency is 20 log I line , and the occlusion current ratio L gz is evaluated by 20 log I line -20 log I gz , that is, 20 log (I line /I gz ). Further, the tooth current ratio calculation means 29a obtains a sideband wave which is a current spectrum peak of the power supply frequency from the spectral data, or a sideband wave which is caused by the tooth frequency of the three-phase induction motor 12, that is, at the power supply frequency The current peak of the current exits the tooth frequency f gp toward the low frequency side and the high frequency side as a center (the tooth frequency f gp is the rotation frequency of the pole of the three-phase induction motor 12 and the rotation axis of the rotor of the three-phase induction motor 12 wherein the peak sideband wave of one of the existence of the number of teeth of a gear mounted product of defined) of the frequency location, such as a maximum peak 20logI gp (I gp is the cause of the output of the fast Fourier converter 24 side pole frequency teeth in The peak value of the current spectrum with the wave, and the peak height of the current spectrum peak of the power supply frequency are 20 log I line , and the tooth current ratio L gp is evaluated by 20 log I line -20 log I gp , that is, 20 log (I line /I gp ).

皮帶旋轉電流比率算出手段30是從譜資料求出既是電源頻率之電流譜峰之邊帶波、亦是起因於三相感應電動機12之皮帶旋轉頻率之邊帶波、亦即在以電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開皮帶旋轉頻率之頻率位置所存在之邊帶波之其中一方之峰值、例如最大峰值20logIbr (Ibr 是從高速傅立葉轉換器24輸出之起因於皮帶旋轉頻率之邊帶波之電流譜之峰值)、與電源頻率之電流譜峰之峰高度20logIline ，將皮帶旋轉電流比率Lbr 以20logIline -20logIbr 、亦即20log(Iline /Ibr )而評價。The belt rotation current ratio calculating means 30 obtains a sideband wave which is a current spectrum peak of the power source frequency from the spectral data, or a sideband wave which is caused by the belt rotation frequency of the three-phase induction motor 12, that is, a current at the power source frequency. peak as a center, respectively, away from the peak of the sideband wave wherein one of the frequencies present rotational position of the belt toward the low frequency side and high frequency side, for example, the maximum peak 20logI br (I br from the fast Fourier converter 24 causes the output The peak of the current spectrum of the band at the side of the belt rotation frequency, the peak height of the current spectrum peak of the power supply frequency is 20logI line , and the belt rotation current ratio L br is 20logI line -20logI br , that is, 20log (I line /I br ) and evaluate.

附帶一提，處理單元18設有：劣化參數選定手段31，為了將因應旋轉機械系統11之機械構造所選擇之劣化參數算出，將電流資訊量算出手段19、電流有效值算出手段20、3相電流平衡算出手段21、電流單諧波比率算出手段22、電流總諧波比率算出手段23、高速傅立葉轉換器24、軸系電流比率算出手段25、極通過電流比率算出手段26、轉子轉差電流比率算出手段27、葉片通過電流比率算出手段28、咬合電流比率算出手段29、齒極電流比率算出手段29a、皮帶旋轉電流比率算出手段30中之必要之算出手段設定成運作狀態。Incidentally, the processing unit 18 is provided with a deterioration parameter selecting means 31 for calculating the current parameter amount calculating means 19 and the current effective value calculating means 20, 3 in order to calculate the deterioration parameter selected in accordance with the mechanical structure of the rotating machine system 11. Current balance calculation means 21, current single harmonic ratio calculation means 22, current total harmonic ratio calculation means 23, fast Fourier transformer 24, shaft system current ratio calculation means 25, pole passage current ratio calculation means 26, rotor slip current The calculation means necessary for the ratio calculation means 27, the blade passing current ratio calculating means 28, the nip current ratio calculating means 29, the tooth current ratio calculating means 29a, and the belt rotating current ratio calculating means 30 are set to the operating state.

簡易異常診斷部14具有：資料庫32，將劣化判定基準值予以保存，該劣化判定基準值是使用在從劣化參數之值來檢測旋轉機械系統11之異常(判定是否發生了異常)時；簡易診斷手段33，對從劣化參數算出部13取得之劣化參數之值、從資料庫32取得之與劣化參數對應之劣化判定基準值進行比較，而診斷旋轉機械系統11之狀態。 在此，劣化判定基準值舉例來說是基於使用到以旋轉機械系統11來設想之模型旋轉機械系統所進行之破壞試驗、習知之保全管理經驗而設定。附帶一提，關於第1種劣化參數，簡易診斷手段33是當第1種劣化參數之值成為設定之劣化判定基準值以上的情況下，判定發生了異常。另一方面，關於第2種劣化參數，是當第2種劣化參數之值成為設定之劣化判定基準值以下的情況下，判定發生了異常。The simple abnormality diagnosis unit 14 includes a database 32 that stores a deterioration determination reference value for detecting an abnormality of the rotary machine system 11 (determination of whether or not an abnormality has occurred) from the value of the deterioration parameter; The diagnosis means 33 compares the value of the deterioration parameter obtained from the deterioration parameter calculation unit 13 with the deterioration determination reference value corresponding to the deterioration parameter obtained from the database 32, and diagnoses the state of the rotary machine system 11. Here, the deterioration determination reference value is set based on, for example, a damage test performed by the model rotary machine system assumed by the rotary machine system 11 and a conventional maintenance management experience. Incidentally, in the case of the first type of deterioration parameter, the simple diagnosis means 33 determines that an abnormality has occurred when the value of the first type of deterioration parameter is equal to or greater than the set deterioration determination reference value. On the other hand, when the value of the second type of deterioration parameter is equal to or less than the set deterioration determination reference value, the second deterioration parameter is determined to have an abnormality.

再者，簡易異常診斷部14具有：劣化傾向管理手段34，將從劣化參數算出部13取得之劣化參數之值依時間序列而保存；剩餘壽命預測手段35，求出將劣化傾向管理手段34所保存之劣化參數之值(劣化傾向管理資料)之隨時間變化之行徑予以顯示之近似函數，推定劣化參數之值變成與劣化判定基準值一致之時間(期待使用壽命)而進行表示。附帶一提，剩餘壽命預測手段35是依各劣化參數而設定危險判定基準值與注意判定基準值來作為劣化判定基準值。劣化參數之值若達到注意判定基準值，則判斷成正在發生與該參數相關之異常，若達到危險判定基準值，則判斷成具有因為與該參數相關之異常而造成旋轉機械系統12停止或破損之危險。當劣化參數之值達到針對注意判定基準值而事先設定之注意範圍時，從注意範圍內之劣化參數之值之隨時間變化而求出近似函數。於圖2顯示3相電流平衡Iub 之劣化傾向管理資料與推定之期待使用壽命，於圖3顯示軸系電流比率Lshaft 之劣化傾向管理資料與推定之期待使用壽命。Further, the simple abnormality diagnosis unit 14 includes a deterioration tendency management means 34 for storing the value of the deterioration parameter obtained from the deterioration parameter calculation unit 13 in time series, and the remaining life prediction means 35 obtaining the deterioration tendency management means 34. The approximation function of the time-dependent change of the value of the deterioration parameter (deterioration tendency management data) to be stored is estimated to be expressed as the time (expected service life) at which the value of the deterioration parameter coincides with the deterioration determination reference value. Incidentally, the remaining life prediction means 35 sets the risk determination reference value and the caution determination reference value as the deterioration determination reference value for each deterioration parameter. If the value of the deterioration parameter reaches the caution determination reference value, it is determined that an abnormality associated with the parameter is occurring, and if the risk determination reference value is reached, it is determined that the rotary mechanical system 12 is stopped or damaged due to an abnormality associated with the parameter. The danger. When the value of the deterioration parameter reaches the attention range set in advance for the attention determination reference value, the approximation function is obtained from the temporal change of the value of the deterioration parameter within the attention range. Fig. 2 shows the deterioration tendency management data of the 3-phase current balance I ub and the estimated expected service life, and Fig. 3 shows the deterioration tendency management data of the shaft current ratio L shaft and the estimated expected service life.

在此，關於注意判定基準值，舉例來說是基於使用到以旋轉機械系統11來設想之模型旋轉機械系統所進行之破壞試驗、習知之保全管理經驗而設定，第1種劣化參數之注意判定基準值是設定成比危險判定基準值還小，第2種劣化參數注意判定基準值是設定成比危險判定基準值還大。藉此，可在劣化參數之值未達到注意判定基準值的情況下將旋轉機械系統11之狀態判定成正常，在劣化參數之值進入注意判定基準值與危險判定基準值之間的情況下將旋轉機械系統11之狀態判定成需要注意，在劣化參數之值達到危險判定基準值(第1種劣化參數是值成為危險判定基準值以上，第2種劣化參數是值成為危險判定基準值以下)的情況下將旋轉機械系統11之狀態判定成危險。Here, the attention determination reference value is set based on, for example, a damage test performed by the model rotary machine system assumed by the rotary machine system 11 and a conventional preservation management experience, and the first type of deterioration parameter is determined. The reference value is set to be smaller than the risk determination reference value, and the second type of deterioration parameter attention determination reference value is set to be larger than the risk determination reference value. Thereby, the state of the rotating machine system 11 can be judged to be normal when the value of the deterioration parameter does not reach the caution determination reference value, and if the value of the deterioration parameter enters between the caution determination reference value and the risk determination reference value, In the state of the rotary machine system 11, it is determined that the value of the deterioration parameter reaches the risk determination reference value (the first type of deterioration parameter is equal to or greater than the risk determination reference value, and the second type of deterioration parameter is equal to or less than the risk determination reference value) In the case, the state of the rotary machine system 11 is judged to be dangerous.

精密異常診斷部15是當在簡易異常診斷部14有電流有效值Irms 、3相電流平衡Iub 、電流單諧波比率idis 、及電流總諧波比率Idis 、軸系電流比率Lshaft 、極通過電流比率Lpole 、轉子轉差電流比率Lrs 、葉片通過電流比率Lbp 、咬合電流比率Lgz 、齒極電流比率Lgp 、及皮帶旋轉電流比率Lbr 之值中之至少其中1者達到劣化判定基準值時，基於達到劣化判定基準值之劣化參數而辨識異常之種類與旋轉機械系統11之異常部位。舉例來說，當達到劣化判定基準值之劣化參數是電流有效值Irms 的情況下，判定成在旋轉機械系統11產生負載變動，當達到劣化判定基準值之劣化參數是3相電流平衡Iub 、電流單諧波比率idis 、或電流總諧波比率Idis 的情況下，判定成朝旋轉機械系統11供給之電源品質或三相感應電動機12之定子產生劣化。The precision abnormality diagnosis unit 15 has a current effective value I rms , a three-phase current balance I ub , a current single harmonic ratio i dis , and a current total harmonic ratio I dis , and a shaft current ratio L shaft in the simple abnormality diagnosis unit 14 . At least one of a value of a pole passing current ratio L pole , a rotor slip current ratio L rs , a blade passing current ratio L bp , a nip current ratio L gz , a tooth current ratio L gp , and a belt rotating current ratio L br When the deterioration determination reference value is reached, the type of the abnormality and the abnormal portion of the rotary machine system 11 are identified based on the deterioration parameter that has reached the deterioration determination reference value. For example, when the deterioration parameter reaching the deterioration determination reference value is the current effective value I rms , it is determined that the load variation occurs in the rotary machine system 11 , and the deterioration parameter when the deterioration determination reference value is reached is the 3-phase current balance I ub When the current single harmonic ratio i dis or the current total harmonic ratio I dis is determined, it is determined that the power quality supplied to the rotary machine system 11 or the stator of the three-phase induction motor 12 is deteriorated.

另外，當達到劣化判定基準值之劣化參數是軸系電流比率Lshaft 的情況下，推定是旋轉機械系統11之旋轉機械軸系之負載產生變化，可想到的是軸系之未對準、不平衡等之異常。 當達到劣化判定基準值之劣化參數是極通過電流比率Lpole 的情況下，推定成在三相感應電動機12之轉子產生劣化，可想到的是轉子導條之損傷等之異常。當達到劣化判定基準值之劣化參數是轉子轉差電流比率Lrs 的情況下，推測是三相感應電動機12之負載扭矩與轉子之實際旋轉數發生變化。Further, when the deterioration parameter reaching the deterioration determination reference value is the shaft current ratio L shaft , it is estimated that the load of the rotary machine shaft system of the rotary machine system 11 changes, and it is conceivable that the shaft system is misaligned or not. Anomalies such as balance. When the deterioration parameter reaching the deterioration determination reference value is the pole passing current ratio L pole , it is estimated that the rotor of the three-phase induction motor 12 is deteriorated, and an abnormality such as damage of the rotor bar is conceivable. When the deterioration parameter reaching the deterioration determination reference value is the rotor slip current ratio L rs , it is presumed that the load torque of the three-phase induction motor 12 and the actual number of rotations of the rotor change.

當達到劣化判定基準值之劣化參數是葉片通過電流比率Lbp 的情況下，推測是在藉由三相感應電動機12所驅動之流體旋轉機械所設之葉片及殼體發生磨耗、腐蝕。 當達到劣化判定基準值之劣化參數是咬合電流比率Lgz 或齒極電流比率Lgp 的情況下，推測是藉由三相感應電動機12驅動之齒輪裝置之齒輪之磨耗、潤滑不佳、折損等之異常。當達到劣化判定基準值之劣化參數是皮帶旋轉電流比率Lbr 的情況下，推測是藉由三相感應電動機12驅動之滑輪皮帶驅動系統之滑輪之未對準與皮帶之鬆緊度之異常。When the deterioration parameter reaching the deterioration determination reference value is the blade passing current ratio L bp , it is presumed that the blade and the casing provided by the fluid rotating machine driven by the three-phase induction motor 12 are worn and corroded. When the deterioration parameter reaching the deterioration determination reference value is the nip current ratio L gz or the tooth current ratio L gp , it is presumed that the gear of the gear device driven by the three-phase induction motor 12 is worn, poorly lubricated, broken, etc. Abnormal. When the deterioration parameter reaching the deterioration determination reference value is the belt rotation current ratio L br , it is presumed that the pulley misalignment of the pulley belt drive system driven by the three-phase induction motor 12 and the belt tightness are abnormal.

使用到與本發明之一實施形態相關之旋轉機械系統之異常監視裝置10之旋轉機械系統的異常監視方法舉例來說是將以下之旋轉機械系統之異常檢測方法組合之旋轉機械系統11的異常監視方法：求出對旋轉機械系統11之總合狀態進行評價之劣化參數之值，進行當劣化參數之值達到事先設定之第1劣化判定基準值(注意判定基準值)時檢測旋轉機械系統11之異常之簡易診斷之旋轉機械系統之異常檢測方法；求出分別對因為旋轉機械系統11之機械構造而造成之個別狀態進行定量評價之劣化參數之值，進行當劣化參數之值達到事先設定之第1劣化判定基準值(注意判定基準值)時檢測旋轉機械系統11之異常之簡易診斷之複數之旋轉機械系統之異常檢測方法。如圖4所示，具有：劣化傾向管理步驟，反覆複數之簡易診斷；精密異常診斷步驟，當複數之簡易診斷之至少一者檢測到旋轉機械系統11之異常、劣化參數之值達到事先設定之第2劣化判定基準值(危險判定基準值)時，基於該參數而辨識異常之種類與旋轉機械系統之異常部位。以下，進行詳細說明。The abnormality monitoring method of the rotary machine system using the abnormality monitoring device 10 of the rotary machine system according to the embodiment of the present invention is an abnormality monitoring of the rotary machine system 11 in which the following abnormality detection methods of the rotary machine system are combined. Method: The value of the deterioration parameter for evaluating the total state of the rotary machine system 11 is obtained, and the rotation machine system 11 is detected when the value of the deterioration parameter reaches the first deterioration determination reference value (note the determination reference value) set in advance. An abnormality detecting method for a rotating machine system that is easy to diagnose abnormally; obtaining a value of a deterioration parameter that quantitatively evaluates an individual state due to a mechanical structure of the rotating machine system 11, and performs a value when the value of the deterioration parameter reaches a predetermined value In the case of the deterioration determination reference value (note the determination reference value), the abnormality detection method of the rotary machine system that detects the plurality of simple diagnoses of the abnormality of the rotary machine system 11 is detected. As shown in FIG. 4, there is a deterioration tendency management step, a simple diagnosis of repeated plurals, and a precision abnormality diagnosis step, when at least one of the plurality of simple diagnoses detects that the abnormality of the rotary mechanical system 11 and the value of the deterioration parameter are set in advance. When the second deterioration determination reference value (hazard determination reference value) is used, the type of the abnormality and the abnormal portion of the rotary machine system are identified based on the parameter. The details will be described below.

(劣化傾向管理步驟) 關於利用對旋轉機械系統11之總合狀態進行評價之劣化參數而進行簡易診斷之旋轉機械系統之異常檢測方法，首先是以劣化參數算出部13之電流測量器16測量三相感應電動機12之運作時電流訊號，獲得藉由A/D轉換器17而數位化之運作時電流訊號(S-1)。接著，令數位化之運作時電流訊號輸入至劣化參數算出部13之處理單元18之電流資訊量算出手段19而算出電流資訊量KI(S-2)。令電流資訊量KI輸入至簡易異常診斷部14，與電流資訊量KI之第1、第2劣化判定基準值(注意判定基準值、危險判定基準值)進行比較。另外，將電流資訊量KI保存在劣化傾向管理手段34，剩餘壽命預測手段35是使用所保存之電流資訊量KI而監視電流資訊量KI之隨時間變化之行徑(以上，S-3)。然後，當電流資訊量KI未達到第2劣化判定基準值(危險判定基準值)的情況下，反覆簡易診斷(S-4)。(Deterioration tendency management step) The abnormality detecting method of the rotary machine system that performs simple diagnosis by using the deterioration parameter for evaluating the total state of the rotary machine system 11 is first measured by the current measurer 16 of the deterioration parameter calculation unit 13. The current signal of the phase induction motor 12 is operated to obtain a current signal (S-1) during operation by the A/D converter 17. Then, the digitized operation current signal is input to the current information amount calculation means 19 of the processing unit 18 of the deterioration parameter calculation unit 13 to calculate the current information amount KI (S-2). The current information amount KI is input to the simple abnormality diagnosis unit 14 and compared with the first and second deterioration determination reference values (the attention determination reference value and the risk determination reference value) of the current information amount KI. In addition, the current information amount KI is stored in the deterioration tendency management means 34, and the remaining life prediction means 35 monitors the time change of the current information amount KI with time using the stored current information amount KI (above, S-3). Then, when the current information amount KI has not reached the second deterioration determination reference value (hazard determination reference value), the simple diagnosis is repeated (S-4).

關於利用對因為旋轉機械系統11之機械構造而造成之個別狀態進行評價之劣化參數、而進行簡易診斷之旋轉機械系統之異常檢測方法，首先是基於旋轉機械系統11之機械構造而進行劣化參數之選定。舉例來說，當旋轉機械系統11是藉由三相感應電動機12驅動之流體旋轉機械的情況下，選擇對旋轉機械系統11之旋轉機械軸系之負載狀況進行評價之軸系電流比率Lshaft 、對三相感應電動機12之轉子之劣化狀況進行評價之極通過電流比率Lpole 、對三相感應電動機12之負載扭矩與實際旋轉數之變化進行推測之轉子轉差電流比率Lrs 、及對設在流體旋轉機械之葉片及殼體之磨耗、腐蝕之發生狀況進行推測之葉片通過電流比率Lbp 來作為劣化參數。The abnormality detecting method of the rotary machine system that performs simple diagnosis by using the deterioration parameter for evaluating the individual state due to the mechanical structure of the rotary machine system 11 is first based on the mechanical configuration of the rotary machine system 11 to perform the deterioration parameter. Selected. For example, when the rotary machine system 11 is a fluid rotating machine driven by the three-phase induction motor 12, the shaft current ratio L shaft that evaluates the load condition of the rotary machine shaft system of the rotary machine system 11 is selected, The rotor slip current ratio L rs , which is estimated by the current ratio L pole , the load torque of the three-phase induction motor 12 and the actual number of revolutions, is estimated by the current ratio L pole of the rotor of the three-phase induction motor 12 The blade passing current ratio L bp is estimated as a deterioration parameter in the occurrence of wear and corrosion of the blade and the casing of the fluid rotating machine.

(進行利用軸系電流比率Lshaft 之簡易診斷之旋轉機械系統之異常檢測方法) 如圖4所示，第1步驟是以劣化參數算出部13之電流測量器16量測三相感應電動機12之運作時電流訊號，獲得藉由A/D轉換器17而數位化之運作時電流訊號(S-1)。接著，令數位化之運作時電流訊號輸入至劣化參數算出部13之處理單元18之高速傅立葉轉換器24而進行高速傅立葉轉換，求出電流譜(S-5)。(Abnormality detection method for rotating machinery systems using simple diagnostic L shaft of the shaft current ratio) As shown, the first step is the deterioration parameter calculating unit 13 of the current measuring device 16 measure the three-phase induction motor 4 of 12 The current signal during operation obtains the operational current signal (S-1) digitized by the A/D converter 17. Then, the digitized operational current signal is input to the fast Fourier transformer 24 of the processing unit 18 of the degradation parameter calculation unit 13, and fast Fourier transform is performed to obtain a current spectrum (S-5).

第2步驟是令獲得之電流譜輸入至軸系電流比率算出手段25，從電流譜中抽出在以三相感應電動機12之電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開三相感應電動機12之實際旋轉頻率(特徴頻率之一例)之頻率位置所存在之電源頻率之電流譜峰之邊帶波，求出峰較高之邊帶波之峰值20logIshaft ；第3步驟是使用峰值20logIshaft 及電源頻率之電流譜峰之峰值20logIline 而算出20log(Iline /Ishaft )來作為軸系電流比率Lshaft (S-6)。In the second step, the obtained current spectrum is input to the shaft current ratio calculating means 25, and the current spectrum is extracted from the current spectrum, and the current spectrum peaks of the power supply frequency of the three-phase induction motor 12 are respectively shifted toward the low frequency side and the high frequency side. supply frequency sideband wave of the current peak is present between the actual rotational frequency of the three-phase induction motor 12 (an example of special Zhi frequency) of the frequency location, to obtain a higher peak of the peak of the sideband wave 20logI shaft; third step is to use the peak current peak 20logI shaft power and frequency of the spectral peak is calculated 20logI line 20log (I line / I shaft) as the shaft current ratio L shaft (S-6).

第4步驟是將獲得之軸系電流比率Lshaft 當作劣化參數而記錄在劣化傾向管理手段34，並將軸系電流比率Lshaft 之值與軸系電流比率Lshaft 之第1、第2劣化判定基準值(注意判定基準值、危險判定基準值)進行比較。另外，剩餘壽命預測手段35是使用所保存之軸系電流比率Lshaft 而監視軸系電流比率Lshaft 之隨時間變化之行徑(以上，S-3)。然後，當軸系電流比率Lshaft 未達到第2劣化判定基準值(危險判定基準值)的情況下，反覆進行利用軸系電流比率Lshaft 之簡易診斷，當軸系電流比率Lshaft 達到第2劣化判定基準值(危險判定基準值)的情況下，將以軸系電流比率Lshaft 檢測到異常之情形輸入至精密異常診斷部15(S-4)。A fourth step shaft and obtain current ratio L shaft as the degradation parameter is recorded in a deterioration tendency management means 34, the first and second values of L shaft degradation of L shaft and the shaft current ratio and current ratio shafting The determination reference value (note the determination reference value and the risk determination reference value) is compared. Further, the remaining life predicting means 35 monitors the time course of the change in the shafting current ratio L shaft with time using the stored shafting current ratio L shaft (above, S-3). When the shaft current ratio L shaft does not reach the second deterioration determination reference value (hazard determination reference value), the simple diagnosis using the shaft current ratio L shaft is repeated, and the shaft current ratio L shaft reaches the second When the deterioration determination reference value (hazard determination reference value) is detected, the abnormality is detected by the shaft current ratio L shaft (S-4).

(進行利用極通過電流比率Lpole 之簡易診斷之旋轉機械系統之異常檢測方法) 如圖4所示，第1步驟是以劣化參數算出部13之電流測量器16量測三相感應電動機12之運作時電流訊號，獲得藉由A/D轉換器17而數位化之運作時電流訊號(S-1)。接著，令數位化之運作時電流訊號輸入至劣化參數算出部13之處理單元18之高速傅立葉轉換器24而求出電流譜(S-5)。(Anomaly detection method of the rotary machine system using the simple diagnosis of the pole passing current ratio L pole ) As shown in FIG. 4, the first step is to measure the three-phase induction motor 12 by the current measurer 16 of the deterioration parameter calculation unit 13. The current signal during operation obtains the operational current signal (S-1) digitized by the A/D converter 17. Next, the digitized operational current signal is input to the fast Fourier transformer 24 of the processing unit 18 of the degradation parameter calculation unit 13 to obtain a current spectrum (S-5).

第2步驟是令獲得之電流譜輸入至極通過電流比率算出手段26，從電流譜中抽出在以三相感應電動機12之電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開三相感應電動機12之極通過頻率(特徴頻率之一例)之頻率位置所存在之邊帶波，求出峰較高之邊帶波之峰值20logIpole ；第3步驟是使用峰值20logIpole 及電源頻率之電流譜峰之峰值20logIline 而算出20log(Iline /Ipole )來作為極通過電流比率Lpole (S-6)。In the second step, the obtained current spectrum is input to the pole passing current ratio calculating means 26, and the current spectrum is extracted from the current spectrum, and the current peaks of the power supply frequency of the three-phase induction motor 12 are respectively shifted toward the low frequency side and the high frequency side. The sideband of the phase induction motor 12 passes through the sideband wave at the frequency position of the frequency (one of the special frequencies) to obtain the peak value of the sideband wave with a peak of 20 logI pole ; the third step is to use the peak value of 20 logI pole and the power frequency. The peak of the current spectrum peak is 20 log I line and 20 log (I line /I pole ) is calculated as the pole passing current ratio L pole (S-6).

第4步驟是將獲得之極通過電流比率Lpole 記錄在劣化傾向管理手段34，並將極通過電流比率Lpole 之值與極通過電流比率Lpole 之第1、第2劣化判定基準值(注意判定基準值、危險判定基準值)進行比較。另外，剩餘壽命預測手段35是使用所保存之軸系電流比率Lpole 而監視極通過電流比率Lpole 之隨時間變化之行徑(以上，S-3)。然後，當極通過電流比率Lpole 未達到第2劣化判定基準值(危險判定基準值)的情況下，反覆進行利用極通過電流比率Lpole 之簡易診斷，當極通過電流比率Lpole 達到第2劣化判定基準值(危險判定基準值)的情況下，將以極通過電流比率Lpole 檢測到異常之情形輸入至精密異常診斷部15(S-4)。The fourth step is obtained in extreme deterioration tendency of the management means 34 records the current ratio L pole, and the pole by the current value of the ratio L pole through the first electrode 1 L pole of the current ratio, the second deterioration determination reference value (note The determination reference value and the risk determination reference value are compared. Further, the remaining life predicting means 35 monitors the time course of the pole passing current ratio L pole with time using the stored shafting current ratio L pole (above, S-3). Then, when the pole passing current ratio L pole does not reach the second deterioration determination reference value (hazard determination reference value), the simple diagnosis using the pole passing current ratio L pole is repeatedly performed, and the pole passing current ratio L pole reaches the second When the deterioration determination reference value (hazard determination reference value) is detected, the abnormality is detected by the pole passing current ratio L pole to the precision abnormality diagnosis unit 15 (S-4).

(進行利用轉子轉差電流比率Lrs 之簡易診斷之旋轉機械系統之異常檢測方法) 如圖4所示，第1步驟是以劣化參數算出部13之電流測量器16量測三相感應電動機12之運作時電流訊號，獲得藉由A/D轉換器17而數位化之運作時電流訊號(S-1)。接著，令數位化之運作時電流訊號輸入至劣化參數算出部13之處理單元18之高速傅立葉轉換器24而求出電流譜(S-5)。(Anomaly Detection Method of Rotary Machinery System Using Simple Diagnosis of Rotor Skating Current Ratio L rs ) As shown in FIG. 4 , the first step is to measure the three-phase induction motor 12 by the current measurer 16 of the deterioration parameter calculation unit 13 . The current signal during operation is obtained by operating the current signal (S-1) digitized by the A/D converter 17. Next, the digitized operational current signal is input to the fast Fourier transformer 24 of the processing unit 18 of the degradation parameter calculation unit 13 to obtain a current spectrum (S-5).

第2步驟是令獲得之電流譜輸入至轉子轉差電流比率算出手段27，從電流譜中抽出在以三相感應電動機12之電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開三相感應電動機12之轉子導條轉差頻率(特徴頻率之一例)之頻率位置所存在之邊帶波，求出峰較高之邊帶波之峰值Irs ；第3步驟是使用峰值20logIrs 及電源頻率之電流譜峰之峰值20logIline 而算出20log(Iline /Irs )來作為轉子轉差電流比率Lrs (S-6)。 在此，在第2步驟中，轉子導條轉差頻率是定義成三相感應電動機12之轉子導條之條數h、三相感應電動機12之轉差頻率fs (以三相感應電動機12之同步旋轉頻率fx 與實際旋轉頻率fr 之差fx -fr 而求出)的積hfs 。In the second step, the obtained current spectrum is input to the rotor slip current ratio calculating means 27, and the current spectrum is extracted from the current spectrum to the low frequency side and the high frequency side as the center of the current spectrum peak of the power supply frequency of the three-phase induction motor 12. The sideband wave existing at the frequency position of the rotor bar slip frequency (one of the special frequencies) of the three-phase induction motor 12 is obtained, and the peak value I rs of the sideband wave having the higher peak is obtained; the third step is to use the peak value 20logI The peak of the current spectrum peak of rs and the power supply frequency is 20 logI line, and 20 log (I line /I rs ) is calculated as the rotor slip current ratio L rs (S-6). Here, in the second step, the rotor bar slip frequency is defined as the number of rotor bars of the three-phase induction motor 12, and the slip frequency f s of the three-phase induction motor 12 (with the three-phase induction motor 12) The product hf s of the synchronous rotation frequency f x and the difference f x -f r between the actual rotation frequencies f r .

第4步驟是將獲得之轉子轉差電流比率Lrs 記錄在劣化傾向管理手段34，並將轉子轉差電流比率Lrs 之值與轉子轉差電流比率Lrs 之第1、第2劣化判定基準值(注意判定基準值、危險判定基準值)進行比較。另外，剩餘壽命預測手段35是使用所保存之轉子轉差電流比率Lrs 而監視轉子轉差電流比率Lrs 之隨時間變化之行徑(以上，S-3)。然後，當轉子轉差電流比率Lrs 未達到第2劣化判定基準值(危險判定基準值)的情況下，反覆進行利用轉子轉差電流比率Lrs 之簡易診斷，當轉子轉差電流比率Lrs 達到第2劣化判定基準值(危險判定基準值)的情況下，將以轉子轉差電流比率Lrs 檢測到異常之情形輸入至精密異常診斷部15(S-4)。The fourth step is to get the rotor current slip ratio L rs deterioration tendency of recorded management means 34, and the rotor rotational speed difference between the value of the current ratio L rs rotor rotational difference between the first and second L rs deterioration determination of the reference current ratio The value (note the judgment reference value and the danger determination reference value) is compared. Further, the remaining life prediction means 35 is to monitor the rotor of the slip acts L rs variation with time of the current ratio (the above, S-3) of the rotor using the saved current slip ratio L rs. Then, when the rotor slip current ratio L rs does not reach the second deterioration determination reference value (hazard determination reference value), the simple diagnosis using the rotor slip current ratio L rs is repeatedly performed, when the rotor slip current ratio L rs When the second deterioration determination reference value (hazard determination reference value) is reached, the abnormality is detected in the rotor slip current ratio L rs to the precision abnormality diagnosis unit 15 (S-4).

(進行利用葉片通過電流比率Lbp 之簡易診斷之旋轉機械系統之異常檢測方法) 如圖4所示，第1步驟是以劣化參數算出部13之電流測量器16量測三相感應電動機12之運作時電流訊號，獲得藉由A/D轉換器17而數位化之運作時電流訊號(S-1)。接著，令數位化之運作時電流訊號輸入至劣化參數算出部13之處理單元18之高速傅立葉轉換器24而求出電流譜(S-5)。(Anomaly Detection Method of Rotary Machinery System Using Simple Diagnosis of Blade Pass Current Ratio L bp ) As shown in FIG. 4 , the first step is to measure the three-phase induction motor 12 by the current measurer 16 of the degradation parameter calculation unit 13 . The current signal during operation obtains the operational current signal (S-1) digitized by the A/D converter 17. Next, the digitized operational current signal is input to the fast Fourier transformer 24 of the processing unit 18 of the degradation parameter calculation unit 13 to obtain a current spectrum (S-5).

第2步驟是令獲得之電流譜輸入至葉片通過電流比率算出手段28，從電流譜中抽出在以三相感應電動機12之電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開三相感應電動機12之葉片通過頻率(特徴頻率之一例)之頻率位置所存在之邊帶波，求出峰較高之邊帶波之峰值Ibp ；第3步驟是使用峰值20logIbp 及電源頻率之電流譜峰之峰值20logIline 而算出20log(Iline /Ibp )來作為轉子轉差電流比率Lrs (S-6)。 在此，在第2步驟中，葉片通過頻率是定義成設在流體旋轉機械之葉片數量m、三相感應電動機12之實際旋轉頻率fr 的積mfr 。In the second step, the obtained current spectrum is input to the blade passing current ratio calculating means 28, and is extracted from the current spectrum and is separated from the low-frequency side and the high-frequency side as the center of the current spectrum peak of the power supply frequency of the three-phase induction motor 12. The blade of the three-phase induction motor 12 passes the sideband wave at the frequency position of the frequency (one of the special frequencies) to obtain the peak I bp of the sideband with a higher peak; the third step is to use the peak of 20 log I bp and the power frequency. The peak of the current spectrum peak was 20 log I line and 20 log (I line /I bp ) was calculated as the rotor slip current ratio L rs (S-6). Here, in the second step, the blade passing frequency is defined as the product mf r of the number m of blades of the fluid rotating machine and the actual rotational frequency f r of the three-phase induction motor 12.

第4步驟是將獲得之葉片通過電流比率Lbp 記錄在劣化傾向管理手段34，並將葉片通過電流比率Lbp 之值與葉片通過電流比率Lbp 之第1、第2劣化判定基準值(注意判定基準值、危險判定基準值)進行比較。另外，剩餘壽命預測手段35是使用所保存之葉片通過電流比率Lbp 而監視葉片通過電流比率Lbp 之隨時間變化之行徑(以上，S-3)。然後，當葉片通過電流比率Lbp 未達到第2劣化判定基準值(危險判定基準值)的情況下，反覆進行利用葉片通過電流比率Lbp 之簡易診斷，當葉片通過電流比率Lbp 達到第2劣化判定基準值(危險判定基準值)的情況下，將以葉片通過電流比率Lbp 檢測到異常之情形輸入至精密異常診斷部15(S-4)。A fourth step of the blade obtained by the current ratio L bp deterioration tendency of recorded management means 34, and the reference blade is determined by the current value of the ratio L bp by the current value of the ratio of the first blade, the second deterioration L bp (note The determination reference value and the risk determination reference value are compared. Further, the remaining life prediction means 35 is to monitor the changes in the act by the current ratio L bp of the blade over time by the current ratio L bp (above, S-3) using the preservation of the blade. Then, when the blade passing current ratio L bp does not reach the second deterioration determination reference value (hazard determination reference value), the simple diagnosis using the blade passing current ratio L bp is repeatedly performed, and the blade passing current ratio L bp reaches the second When the deterioration determination reference value (hazard determination reference value) is detected, the abnormality is detected in the blade passing current ratio L bp (S-4).

(精密異常診斷步驟) 由於在簡易異常診斷部14檢測到異常之劣化參數之資訊會輸入精密異常診斷部15，故其可從輸入之劣化參數之種類來辨識在旋轉機械系統11發生之異常之種類與旋轉機械系統11之異常部位(S-7)，令其結果例如顯示在顯示器(S-8)。(Precision abnormality diagnosis step) Since the information of the deterioration parameter detected by the simple abnormality diagnosis unit 14 is input to the precision abnormality diagnosis unit 15, it is possible to recognize the abnormality occurring in the rotary machine system 11 from the type of the input deterioration parameter. The type and the abnormal portion (S-7) of the rotary machine system 11 are displayed on the display (S-8), for example.

在此，當輸入至精密異常診斷部15之劣化參數是軸系電流比率Lshaft 的情況下，推定是旋轉機械系統11之旋轉機械軸系之負載產生變化，可想到的是軸系之未對準、不平衡等之異常。當劣化參數是極通過電流比率Lpole 的情況下，推定成在三相感應電動機12之轉子產生劣化，可想到的是轉子導條之損傷等之異常。當劣化參數是轉子轉差電流比率Lrs 的情況下，推測是三相感應電動機12之負載扭矩與轉子之實際旋轉數發生變化。當劣化參數是葉片通過電流比率Lbp 的情況下，推測是在藉由三相感應電動機12所驅動之流體旋轉機械所設之葉片及殼體發生磨耗、腐蝕。Here, when the deterioration parameter input to the precision abnormality diagnosis unit 15 is the shaft current ratio L shaft , it is estimated that the load of the rotary machine shaft system of the rotary machine system 11 changes, and it is conceivable that the shaft system is not correct. Anomalies such as quasi-unbalanced. When the deterioration parameter is the pole passing current ratio L pole , it is estimated that the rotor of the three-phase induction motor 12 is deteriorated, and an abnormality such as damage of the rotor bar is conceivable. When the deterioration parameter is the rotor slip current ratio L rs , it is presumed that the load torque of the three-phase induction motor 12 and the actual number of revolutions of the rotor change. When the deterioration parameter is the blade passing current ratio L bp , it is presumed that the blade and the casing provided by the fluid rotating machine driven by the three-phase induction motor 12 are worn and corroded.

(劣化傾向管理步驟) 附帶一提，當旋轉機械系統11是與三相感應電動機12連接之減速機的情況下，選定咬合電流比率Lgz 而取代葉片通過電流比率Lbp ，進行利用咬合電流比率Lgz 之簡易診斷來作為旋轉機械系統之異常檢測方法。亦即，如圖4所示，第1步驟是以劣化參數算出部13之電流測量器16量測三相感應電動機12之運作時電流訊號，獲得藉由A/D轉換器17而數位化之運作時電流訊號(S-1)。接著，令數位化之運作時電流訊號輸入至劣化參數算出部13之處理單元18之高速傅立葉轉換器24而求出電流譜(S-5)。(Deterioration tendency management step) Incidentally, in the case where the reducer is connected to the rotating machine system 11 is a three-phase induction motor 12, the current ratio L gz nip selected in place of the blade by the current ratio L bp, using a nip for current ratio The simple diagnosis of L gz is used as an abnormality detection method for a rotating mechanical system. That is, as shown in FIG. 4, the first step is to measure the current signal of the three-phase induction motor 12 during the operation of the current measuring device 16 of the degradation parameter calculating unit 13, and obtain the digital signal by the A/D converter 17. Current signal (S-1) during operation. Next, the digitized operational current signal is input to the fast Fourier transformer 24 of the processing unit 18 of the degradation parameter calculation unit 13 to obtain a current spectrum (S-5).

第2步驟是令獲得之電流譜輸入至咬合電流比率算出手段29，從電流譜中抽出在以三相感應電動機12之電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開三相感應電動機12之齒輪咬合頻率(特徴頻率之一例)之頻率位置所存在之邊帶波，求出峰較高之邊帶波之峰值Igz ；第3步驟是使用峰值20logIgz 及電源頻率之電流譜峰之峰值20logIline 而算出20log(Iline /Igz )來作為咬合電流比率Lgz (S-6)。 在此，在第2步驟中，齒輪咬合頻率是定義成在三相感應電動機12之轉子之旋轉軸所安裝之齒輪之齒數z、三相感應電動機12之實際旋轉頻率fr 的積zfr 。In the second step, the obtained current spectrum is input to the nip current ratio calculating means 29, and the current spectrum is extracted from the current spectrum and is separated from the low-frequency side and the high-frequency side by the current spectrum peak of the power supply frequency of the three-phase induction motor 12. the present position of a frequency-phase induction motor gear 12 engaging the frequency (an example of special Zhi frequency) of the sideband wave, obtains the peak value of the high peaks of the sideband wave I gz; third step is to use the peak power and frequency 20logI gz The peak of the current spectrum peak was 20 log I line and 20 log (I line /I gz ) was calculated as the nip current ratio L gz (S-6). Here, in the second step, the gear meshing frequency is defined as the product zf r of the gear z of the gear mounted on the rotating shaft of the rotor of the three-phase induction motor 12 and the actual rotational frequency f r of the three-phase induction motor 12.

第4步驟是將獲得之咬合電流比率Lgz 記錄在劣化傾向管理手段34，並將咬合電流比率Lgz 之值與咬合電流比率Lgz 之第1、第2劣化判定基準值(注意判定基準值、危險判定基準值)進行比較。另外，剩餘壽命預測手段35是使用所保存之咬合電流比率Lgz 而監視咬合電流比率Lgz 之隨時間變化之行徑(以上，S-3)。然後，當咬合電流比率Lgz 未達到第2劣化判定基準值(危險判定基準值)的情況下，反覆進行利用咬合電流比率Lgz 之簡易診斷，當咬合電流比率Lgz 達到第2劣化判定基準值(危險判定基準值)的情況下，將以咬合電流比率Lgz 檢測到異常之情形輸入至精密異常診斷部15(S-4)。A fourth step of obtaining the current ratio L gz nip deterioration tendency of recorded management means 34, and the engagement of the first, second deterioration L gz of the current value of the ratio L gz nip reference current ratio determination value (determination reference value note , danger determination reference value) for comparison. Further, the remaining life predicting means 35 monitors the time course of the occlusion current ratio L gz with time using the stored occlusion current ratio L gz (above, S-3). When the occlusion current ratio L gz does not reach the second deterioration determination reference value (hazard determination reference value), the simple diagnosis using the occlusion current ratio L gz is repeated, and the occlusion current ratio L gz reaches the second degradation determination criterion. In the case of the value (hazard determination reference value), the abnormality is detected by the occlusion current ratio L gz (S-4).

(精密異常診斷步驟) 由於在簡易異常診斷部14檢測到異常之劣化參數之資訊會輸入精密異常診斷部15，故其可從輸入之劣化參數之種類來辨識在旋轉機械系統11發生之異常之種類與旋轉機械系統11之異常部位(S-7)，令其結果例如顯示在顯示器(S-8)。 當輸入至精密異常診斷部15之劣化參數是咬合電流比率Lgz 的情況下，可推測是藉由三相感應電動機12驅動之齒輪裝置之齒輪之磨耗、潤滑不佳、折損等之異常。(Precision abnormality diagnosis step) Since the information of the deterioration parameter detected by the simple abnormality diagnosis unit 14 is input to the precision abnormality diagnosis unit 15, it is possible to recognize the abnormality occurring in the rotary machine system 11 from the type of the input deterioration parameter. The type and the abnormal portion (S-7) of the rotary machine system 11 are displayed on the display (S-8), for example. When the deterioration parameter input to the precision abnormality diagnosis unit 15 is the occlusion current ratio L gz , it is presumed that the gear of the gear device driven by the three-phase induction motor 12 has an abnormality such as abrasion, poor lubrication, and breakage.

(劣化傾向管理步驟) 另外，當旋轉機械系統11是藉由三相感應電動機12驅動之皮帶驅動旋轉機械的情況下，選定皮帶旋轉電流比率Lbr 而取代葉片通過電流比率Lbp ，進行利用皮帶旋轉電流比率Lbr 之簡易診斷來作為旋轉機械系統之異常檢測方法。 亦即，如圖4所示，第1步驟是以劣化參數算出部13之電流測量器16量測三相感應電動機12之運作時電流訊號，獲得藉由A/D轉換器17而數位化之運作時電流訊號(S-1)。接著，令數位化之運作時電流訊號輸入至劣化參數算出部13之處理單元18之高速傅立葉轉換器24而求出電流譜(S-5)。(Deterioration tendency management step) Further, when the rotary machine system 11 is a belt-driven rotary machine driven by the three-phase induction motor 12, the belt rotation current ratio L br is selected instead of the blade passage current ratio L bp , and the belt is utilized. A simple diagnosis of the rotating current ratio L br is used as an abnormality detecting method of the rotating mechanical system. That is, as shown in FIG. 4, the first step is to measure the current signal of the three-phase induction motor 12 during the operation of the current measuring device 16 of the degradation parameter calculating unit 13, and obtain the digital signal by the A/D converter 17. Current signal (S-1) during operation. Next, the digitized operational current signal is input to the fast Fourier transformer 24 of the processing unit 18 of the degradation parameter calculation unit 13 to obtain a current spectrum (S-5).

第2步驟是令獲得之電流譜輸入至皮帶旋轉電流比率算出30，從電流譜中抽出在以三相感應電動機12之電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開三相感應電動機12之皮帶旋轉頻率(特徴頻率之一例)之頻率位置所存在之邊帶波，求出峰較高之邊帶波之峰值Ibr ；第3步驟是使用峰值20logIbr 及電源頻率之電流譜峰之峰值20logIline 而算出20log(Iline /Ibr )來作為皮帶旋轉電流比率Lbr (S-6)。 在此，在第2步驟中，皮帶旋轉頻率是定義成隨著在三相感應電動機12之轉子之旋轉軸所設之滑輪之1旋轉而造成之皮帶移動量相對於皮帶全長之移動比率、三相感應電動機12之實際旋轉頻率的積。In the second step, the obtained current spectrum is input to the belt rotation current ratio calculation 30, and the current spectrum is extracted from the current spectrum as the center of the current spectrum peak of the three-phase induction motor 12, and is respectively shifted toward the low frequency side and the high frequency side. The sideband wave in the frequency position of the belt rotation frequency of the phase induction motor 12 (one example of the characteristic frequency) is obtained, and the peak value I br of the sideband wave having the higher peak is obtained. The third step is to use the peak value of 20 log I br and the power frequency. The peak of the current spectrum peak was 20 log I line and 20 log (I line /I br ) was calculated as the belt rotation current ratio L br (S-6). Here, in the second step, the belt rotation frequency is defined as the movement ratio of the belt movement amount with respect to the belt full length as the pulley 1 of the rotation shaft of the rotor of the three-phase induction motor 12 rotates, The product of the actual rotational frequency of the phase induction motor 12.

第4步驟是將獲得之皮帶旋轉電流比率Lbr 記錄在劣化傾向管理手段34，並將皮帶旋轉電流比率Lbr 之值與皮帶旋轉電流比率Lbr 之第1、第2劣化判定基準值(注意判定基準值、危險判定基準值)進行比較。另外，剩餘壽命預測手段35是使用所保存之皮帶旋轉電流比率Lbr 而監視皮帶旋轉電流比率Lbr 之隨時間變化之行徑(以上，S-3)。然後，當皮帶旋轉電流比率Lbr 未達到第2劣化判定基準值(危險判定基準值)的情況下，反覆進行利用皮帶旋轉電流比率Lbr 之簡易診斷，當皮帶旋轉電流比率Lbr 達到第2劣化判定基準值(危險判定基準值)的情況下，將以皮帶旋轉電流比率Lbr 檢測到異常之情形輸入至精密異常診斷部15(S-4)。Fourth step is a belt rotating current ratio L br obtained in the deterioration tendency of the recording management means 34, and the first determination reference value, the second value of L br deterioration of belt revolutions L br current ratio and current ratio belt rotation (note The determination reference value and the risk determination reference value are compared. Further, the remaining life predicting means 35 monitors the time course of the belt rotation current ratio L br with time using the stored belt rotation current ratio L br (above, S-3). Then, when the belt rotation current ratio L br does not reach the second deterioration determination reference value (hazard determination reference value), the simple diagnosis using the belt rotation current ratio L br is repeatedly performed, and when the belt rotation current ratio L br reaches the second When the deterioration determination reference value (hazard determination reference value) is detected, the abnormality is detected in the belt rotation current ratio L br to the precision abnormality diagnosis unit 15 (S-4).

(精密異常診斷步驟) 由於在簡易異常診斷部14檢測到異常之劣化參數之資訊會輸入精密異常診斷部15，故其可從輸入之劣化參數之種類來辨識在旋轉機械系統11發生之異常之種類與旋轉機械系統11之異常部位(S-7)，令其結果例如顯示在顯示器(S-8)。 當輸入至精密異常診斷部15之劣化參數是皮帶旋轉電流比率Lbr 的情況下，可推測是藉由三相感應電動機12驅動之滑輪皮帶驅動系統之滑輪之未對準與皮帶之鬆緊度及磨耗之異常。(Precision abnormality diagnosis step) Since the information of the deterioration parameter detected by the simple abnormality diagnosis unit 14 is input to the precision abnormality diagnosis unit 15, it is possible to recognize the abnormality occurring in the rotary machine system 11 from the type of the input deterioration parameter. The type and the abnormal portion (S-7) of the rotary machine system 11 are displayed on the display (S-8), for example. When the deterioration parameter input to the precision abnormality diagnosis unit 15 is the belt rotation current ratio L br , it is presumed that the pulley misalignment of the pulley belt drive system driven by the three-phase induction motor 12 and the belt tightness and Abnormal wear.

雖然以上是參考實施形態來說明本發明，但本發明並非限定於上述之實施形態所記載之構成，包含在申請專利範圍所記載之事項之範圍內可想到之其他之實施形態、變形例。 舉例來說，雖然以上說明的是以劣化參數算出部之電流測量器來測量三相感應電動機之運作時電流訊號、在藉由A/D轉換器進行數位化後輸入至劣化參數算出部之線上型之使用到旋轉機械系統之異常檢測方法之旋轉機械系統之異常監視方法，但亦可以是在量測三相感應電動機之運作時電流訊號而予以保存之後、輸入至劣化參數算出部之離線型之使用到旋轉機械系統之異常檢測方法之旋轉機械系統之異常監視方法。The present invention has been described above with reference to the embodiments, but the present invention is not limited to the configurations described in the above-described embodiments, and includes other embodiments and modifications that are conceivable within the scope of the claims. For example, the current measuring device for measuring the operation of the three-phase induction motor is measured by the current measuring device of the deterioration parameter calculating unit, and is input to the line of the deterioration parameter calculating unit after being digitized by the A/D converter. The abnormality monitoring method of the rotary mechanical system using the abnormality detecting method of the rotating mechanical system, but may be an offline type input to the deterioration parameter calculating unit after the current signal is measured while the three-phase induction motor is being operated. An abnormality monitoring method of a rotating mechanical system using an abnormality detecting method of a rotating mechanical system.

雖然旋轉機械系統之異常檢測方法是同時實行複數之利用對因為旋轉機械系統之機械構造而造成之個別狀態進行評價之劣化參數之簡易診斷，但亦可以是選擇一劣化參數而實行。 另外，雖然說明了將身為特徴頻率之齒輪咬合頻率定義成在三相感應電動機之轉子之旋轉軸所安裝之齒輪之齒數、三相感應電動機之實際旋轉頻率的積的情況，但亦可以令特徴頻率是定義成在三相感應電動機之轉子之旋轉軸所安裝之齒輪之齒數、三相感應電動機之極通過頻率的積的齒極頻率，亦可以採用齒輪咬合頻率與齒極頻率雙方來作為特徴頻率。 另外，關於對因為旋轉機械系統之機械構造而造成之個別狀態進行評價之劣化參數，亦可以加入電流有效值Irms 、運作時電流訊號之3相電流平衡Iub 、運作時電流訊號之電流單諧波比率idis 、及電流總諧波比率Idis 之任1者或任意2者以上之組合。 若以電流有效值Irms 檢測到異常，則可推測是旋轉機械系統之負載產生異常，若以3相電流平衡Iub 、電流單諧波比率idis 、或電流總諧波比率Idis 檢測到異常，則可推測是電源品質或三相感應電動機之定子產生異常。 再者，求出電源頻率之電流譜峰之邊帶波之雙方之電流譜峰值的情況下，以電流譜峰值之平均值作為邊帶波之電流譜峰值。 附帶一提，即便三相感應電動機之電源是反向器電源，亦可適用本發明。Although the abnormality detecting method of the rotating machine system simultaneously performs a simple diagnosis of the deterioration parameter for evaluating the individual state due to the mechanical structure of the rotating mechanical system, it may be performed by selecting a deterioration parameter. Further, although the case where the gear meshing frequency which is the characteristic frequency is defined as the product of the number of teeth of the gear mounted on the rotating shaft of the rotor of the three-phase induction motor and the actual rotational frequency of the three-phase induction motor is described, The characteristic frequency is a tooth frequency which is defined as the number of teeth of the gear mounted on the rotating shaft of the rotor of the three-phase induction motor, and the product of the passing frequency of the three-phase induction motor. It is also possible to use both the gear meshing frequency and the tooth frequency. Special frequency. In addition, regarding the deterioration parameter for evaluating the individual state caused by the mechanical structure of the rotating mechanical system, the current effective value I rms , the 3-phase current balance I ub of the current signal during operation, and the current signal of the current signal during operation may be added. Any one or a combination of two or more of the harmonic ratio i dis and the current total harmonic ratio I dis . If an abnormality is detected by the current effective value I rms , it is presumed that the load of the rotating mechanical system is abnormal, and if the 3-phase current balance I ub , the current single harmonic ratio i dis , or the current total harmonic ratio I dis is detected If it is abnormal, it is presumed that the power quality or the stator of the three-phase induction motor is abnormal. Further, when the current spectrum peaks of both sidebands of the current spectrum peak of the power supply frequency are obtained, the average value of the current spectrum peak is used as the peak of the current spectrum of the sideband wave. Incidentally, the present invention can be applied even if the power source of the three-phase induction motor is an inverter power source.

10‧‧‧旋轉機械系統的異常監視裝置
11‧‧‧旋轉機械系統
12‧‧‧三相感應電動機
12a‧‧‧電源纜線
13‧‧‧劣化參數算出部
14‧‧‧簡易異常診斷部
15‧‧‧精密異常診斷部
16‧‧‧電流測量器
17‧‧‧A/D轉換器
18‧‧‧處理單元
19‧‧‧電流資訊量算出手段
20‧‧‧電流有效值算出手段
21‧‧‧3相電流平衡算出手段
22‧‧‧電流單諧波比率算出手段
23‧‧‧電流總諧波比率算出手段
24‧‧‧高速傅立葉轉換器
25‧‧‧軸系電流比率算出手段
26‧‧‧極通過電流比率算出手段
27‧‧‧轉子轉差電流比率算出手段
28‧‧‧葉片通過電流比率算出手段
29‧‧‧咬合電流比率算出手段
29a‧‧‧齒極電流比率算出手段
30‧‧‧皮帶旋轉電流比率算出手段
31‧‧‧劣化參數選定手段
32‧‧‧資料庫
33‧‧‧簡易診斷手段
34‧‧‧劣化傾向管理手段
35‧‧‧剩餘壽命預測手段
KI‧‧‧電流資訊量10‧‧‧Anomaly monitoring device for rotating machinery systems
11‧‧‧Rotating Machinery System
12‧‧‧Three-phase induction motor
12a‧‧‧Power cable
13‧‧‧Degradation parameter calculation unit
14‧‧‧Simple abnormal diagnosis department
15‧‧‧Precision Abnormal Diagnosis Department
16‧‧‧current measuring device
17‧‧‧A/D converter
18‧‧‧Processing unit
19‧‧‧ Current information calculation means
20‧‧‧ Current RMS calculation method
21‧‧‧3 phase current balance calculation means
22‧‧‧ Current single harmonic ratio calculation means
23‧‧‧ Current total harmonic ratio calculation means
24‧‧‧Speed Fourier Transformer
25‧‧‧Shaft current ratio calculation means
26‧‧‧ pole through current ratio calculation means
27‧‧‧Rotor slip current ratio calculation means
28‧‧‧ Blade passing current ratio calculation means
29‧‧‧Bearing current ratio calculation means
29a‧‧‧Tooth current ratio calculation means
30‧‧‧ Belt rotation current ratio calculation means
31‧‧‧Degradation parameter selection means
32‧‧‧Database
33‧‧‧Simplified diagnostic tools
34‧‧‧Degradation tendency management means
35‧‧‧Residual life prediction means
KI‧‧‧ Current information volume

圖1...與本發明之一實施形態相關之旋轉機械系統的異常監視裝置的方塊圖。 圖2...3相電流平衡Iub 之劣化傾向管理資料與推定之期待使用壽命的說明圖。 圖3...軸系電流比率Lshaft 之劣化傾向管理資料與推定之期待使用壽命的說明圖。 圖4...與本發明之一實施形態相關之旋轉機械系統之異常檢測方法及異常監視方法的流程圖。 圖5...電源頻率之電流譜峰之邊帶波的說明圖。Fig. 1 is a block diagram showing an abnormality monitoring device of a rotary machine system according to an embodiment of the present invention. Fig. 2 is an explanatory diagram of the deterioration tendency management data of the 3-phase current balance I ub and the estimated expected service life. Fig. 3 is an explanatory diagram of the deterioration tendency management data of the shafting current ratio L shaft and the estimated expected service life. Fig. 4 is a flow chart showing an abnormality detecting method and an abnormality monitoring method of a rotating machine system according to an embodiment of the present invention. Figure 5 is an explanatory diagram of the sideband of the current spectrum peak of the power supply frequency.

Claims (8)

一種旋轉機械系統之異常檢測方法，是從三相感應電動機之運作時電流訊號之解析結果，檢測出發生在以該三相感應電動機作為驅動源之旋轉機械系統之異常的旋轉機械系統之異常檢測方法，其特徵在於進行包含以下步驟之簡易診斷： 第1步驟，量測前述三相感應電動機之運作時電流訊號，進行該運作時電流訊號之高速傅立葉轉換； 第2步驟，從藉由前述高速傅立葉轉換而獲得之電流譜中，抽出存在於以前述三相感應電動機之電源頻率之電流譜峰作為中心而分別朝低頻側及高頻側離開一特徴頻率之頻率位置的前述電源頻率之電流譜峰的邊帶波，並求出前述邊帶波之任一者或雙方之電流譜峰值，其中該特徴頻率與前述旋轉機械系統之異常相關； 第3步驟，使用在前述第2步驟所求出之前述邊帶波之電流譜峰值及前述電源頻率之電流譜峰之峰值，算出前述旋轉機械系統之劣化參數； 第4步驟，記錄前述劣化參數之值，並將該劣化參數之值與事先設定之劣化判定基準值相比較，根據該劣化參數之值已達前述劣化判定基準值之情形而檢測出異常。An abnormality detecting method for a rotating mechanical system is an abnormality detecting of an abnormal rotating mechanical system that occurs in a rotating mechanical system using the three-phase induction motor as a driving source from an analysis result of a current signal during operation of a three-phase induction motor The method is characterized in that a simple diagnosis including the following steps is performed: a first step of measuring a current signal of the three-phase induction motor during operation, and performing a fast Fourier transform of the current signal during the operation; and a second step, from the aforementioned high speed In the current spectrum obtained by the Fourier transform, a current spectrum of the aforementioned power supply frequency existing at a frequency position which is separated from the current spectrum peak of the power supply frequency of the three-phase induction motor as a center and which is separated from the low frequency side and the high frequency side by a special frequency is extracted. a sideband wave of the peak, and a current spectrum peak of either or both of the sideband waves, wherein the characteristic frequency is related to an abnormality of the rotating machine system; and the third step is obtained by using the second step Calculating the peak of the current spectrum of the sideband wave and the peak of the current spectrum peak of the power source frequency Deterioration parameter of the rotating mechanical system; in the fourth step, the value of the deterioration parameter is recorded, and the value of the degradation parameter is compared with a previously determined deterioration determination reference value, and the value of the degradation parameter has reached the aforementioned deterioration determination reference value An abnormality was detected in the situation. 如請求項1之旋轉機械系統之異常檢測方法，其中前述特徴頻率是轉子導條轉差頻率，該轉子導條轉差頻率被定義為前述三相感應電動機之轉子導條之條數與該三相感應電動機之轉差頻率的積。The abnormality detecting method of the rotating mechanical system of claim 1, wherein the characteristic frequency is a rotor bar slip frequency, and the rotor bar slip frequency is defined as the number of the rotor bars of the three-phase induction motor and the three The product of the slip frequency of the phase induction motor. 如請求項1之旋轉機械系統之異常檢測方法，其中前述特徴頻率是葉片通過頻率，該葉片通過頻率被定義為設在由前述三相感應電動機驅動之流體旋轉機械之葉片數量與該三相感應電動機之實際旋轉頻率的積。The abnormality detecting method of the rotary mechanical system according to claim 1, wherein the characteristic frequency is a blade passing frequency, and the blade passing frequency is defined as a number of blades of the fluid rotating machine driven by the three-phase induction motor and the three-phase induction The product of the actual rotational frequency of the motor. 如請求項1之旋轉機械系統之異常檢測方法，其中前述特徴頻率是齒輪咬合頻率，該齒輪咬合頻率被定義為在前述三相感應電動機之轉子之旋轉軸所安裝之齒輪的齒數與該三相感應電動機之實際旋轉頻率的積。The abnormality detecting method of the rotary mechanical system according to claim 1, wherein the characteristic frequency is a gear meshing frequency, and the gear meshing frequency is defined as a number of teeth of the gear mounted on a rotating shaft of the rotor of the three-phase induction motor and the three-phase The product of the actual rotational frequency of the induction motor. 如請求項1之旋轉機械系統之異常檢測方法，其中前述特徴頻率是齒極頻率，該齒極頻率被定義為前述三相感應電動機之極通過頻率與在該三相感應電動機之轉子之旋轉軸所安裝之齒輪的齒數的積。The abnormality detecting method of the rotary mechanical system according to claim 1, wherein the characteristic frequency is a tooth frequency, and the tooth frequency is defined as a pole passing frequency of the three-phase induction motor and a rotating shaft of the rotor of the three-phase induction motor The product of the number of teeth of the mounted gear. 如請求項1之旋轉機械系統之異常檢測方法，其中前述特徴頻率是皮帶旋轉頻率，該皮帶旋轉頻率被定義為皮帶移動量相對於皮帶全長之移動比率與該三相感應電動機之實際旋轉頻率的積，該皮帶移動量為隨著在前述三相感應電動機之轉子之旋轉軸所安裝之滑輪的1旋轉而造成之皮帶移動量。The abnormality detecting method of the rotary mechanical system according to claim 1, wherein the characteristic frequency is a belt rotation frequency, and the belt rotation frequency is defined as a movement ratio of the belt movement amount to the belt full length and an actual rotation frequency of the three-phase induction motor. The amount of movement of the belt is the amount of belt movement caused by the rotation of the pulley 1 mounted on the rotating shaft of the rotor of the three-phase induction motor. 一種旋轉機械系統的異常監視方法，是組合了如請求項2~6之旋轉機械系統之異常檢測方法之任1者或2者以上之旋轉機械系統的異常監視方法，其特徵在於包含： 劣化傾向管理步驟，反覆進行複數之前述簡易診斷； 精密異常診斷步驟，當複數之前述簡易診斷之至少其中一者檢測到異常時，基於達到前述劣化判定基準值之前述劣化參數而辨識出異常之種類與在前述旋轉機械系統中之異常部位。An abnormality monitoring method for a rotating machine system is an abnormality monitoring method of a rotating machine system in which one or more of the abnormality detecting methods of the rotating machine system according to claims 2 to 6 are combined, and the present invention includes: The management step repeats the simple diagnosis described above; the precision abnormality diagnosis step identifies the type of the abnormality based on the deterioration parameter that reaches the deterioration determination reference value when at least one of the plurality of simple diagnoses detects an abnormality An abnormal part in the aforementioned rotating mechanical system. 一種旋轉機械系統的異常監視裝置，是使用在如請求項7之旋轉機械系統的異常監視方法之旋轉機械系統的異常監視裝置，其特徵在於包含： 劣化參數算出部，從前述三相感應電動機之運作時電流訊號求出前述劣化參數； 簡易異常診斷部，記錄前述劣化參數之值，並將該劣化參數之值與前述劣化判定基準值相比較； 精密異常診斷部，當藉由前述簡易異常診斷部而於前述旋轉機械系統檢測到異常時，基於已達前述劣化判定基準值之前述劣化參數，而辨識出異常之種類與在前述旋轉機械系統中之異常部位。An abnormality monitoring device for a rotating machine system, which is an abnormality monitoring device for a rotating machine system using an abnormality monitoring method of a rotating machine system according to claim 7, characterized by comprising: a deterioration parameter calculating unit from the three-phase induction motor The current signal during operation obtains the deterioration parameter; the simple abnormality diagnosis unit records the value of the deterioration parameter, and compares the value of the deterioration parameter with the deterioration determination reference value; and the precision abnormality diagnosis unit performs the simple abnormality diagnosis When an abnormality is detected in the rotating machine system, the type of the abnormality and the abnormal portion in the rotating machine system are recognized based on the deterioration parameter that has reached the deterioration determination reference value.
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PH12018501932A1 (en) 2019-06-17
TWI605259B (en) 2017-11-11
JP2017181437A (en) 2017-10-05
WO2017168796A1 (en) 2017-10-05
SG11201805943PA (en) 2018-08-30

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