JP3457413B2 - Diagnostic equipment for rotating machinery - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary machine diagnostic device, and more particularly to a rotary machine diagnostic device including a device capable of detecting a failure factor event of the rotary machine.

[0002]

2. Description of the Related Art Generally, a conventional diagnostic apparatus for a rotary machine measures a physical mechanical phenomenon amount such as a vibration value of a rotating body and compares it with a preset judgment value (threshold value) of the phenomenon amount. Most of the above, it is determined that an abnormality such as a failure or a failure has occurred in the rotating machine if the amount of phenomenon exceeds the determination value.

An example of such a rotary machine diagnostic device is a water turbine runner failure detection device disclosed in Japanese Patent Publication No. 3-10036. The turbine runner failure detection device shown in this publication has a crack in the turbine runner,
If an abnormality such as breakage occurs, the balance of the rotating body will be lost and the vibration of the main parts such as the spindle and upper cover will increase, so these vibration amplitudes (overall value)
Was measured, and if this exceeded the preset judgment value of vibration amplitude, it was judged that an abnormality had occurred in the equipment, and an alarm was issued to the operator to take necessary measures for maintenance and safety. It is a thing.

Therefore, if damage to the turbine runner can be detected early in such a turbine runner failure detecting device,
It is possible to prevent serious accidents such as breakage of the main shaft and the upper cover that may be caused by the progress, and make a great contribution to the maintenance and reliability of the machine.

As described above, the conventional rotary machine diagnostic device is
A characteristic event that occurs due to an abnormality such as a failure or a failure is detected by comparing a predetermined measured amount of phenomenon with a preset limit value.

However, unlike an emergency stop device that detects the occurrence of a fatal failure and forcibly stops the operation of the rotating machine to prevent the spread of the accident, it aims at preventive maintenance of the rotating machine. A special function is required for the diagnostic equipment of rotating machinery.

That is, when an abnormality occurs in a rotating machine, it must be detected at an early stage, but unless considerable credibility is recognized in the diagnostic result, it is promptly detected on the basis of the detection of a symptomatic event. It is not possible to decide to stop the rotating machine. In particular, rotating machines such as generators are required to be diagnosed from maintenance requirements, but it is difficult to easily diagnose the degree of abnormality of rotating machines. However, it is necessary to determine the cause and determine the progress of the abnormality quantitatively before deciding whether to stop the operation.

However, in the conventional diagnostic apparatus for a rotary machine, since a symptomatic event is immediately cut off as a serious abnormality of the rotary machine, if the determination result is directly followed, the normal operation of the rotary machine may be impaired. . For example, in a pumped-storage power generator, when a threshold value is set for the rotational speed synchronization component of the shaft vibration, detection of this will immediately lead to the determination that the turbine runner is defective. However, as shown in FIGS. 7A and 7B, even in a normal state, the shaft vibration may greatly change depending on the operating condition and exceed the threshold value.

Therefore, in such a diagnostic device, if a diagnosis is made from a slight increase in vibration, an erroneous diagnosis is made that a serious abnormality such as a loss of a water turbine runner occurs even though the generator has no abnormality. And the generator has to be stopped each time. For this reason, the threshold for judgment is set to have a margin so that it does not react to a slight change, but such measures may overlook the signs of abnormality and promptly detect the abnormality. This means that the original purpose of the diagnostic device to be discovered cannot be achieved.

Further, the failure factors that can be determined by the phenomenon of excessive shaft amplitude include a plurality of failure causes other than the loss of the turbine runner. It is possible to narrow down the failure factors to some extent by monitoring events other than shaft vibration, but it has not been possible to completely identify the failure factors,
At present, the purpose of the diagnostic device, which contributes to the maintenance of rotating machinery, has not been fully achieved.

[0011]

As described above, in the conventional diagnostic apparatus for a rotary electric machine, if an attempt is made to detect an abnormality early and the threshold value is set low, the abnormality is detected despite the normal state. In addition, if the threshold value is set to be high in order to prevent such misdiagnosis, there is an operational problem that a sign of abnormality is missed.

The present invention has been made in view of the above circumstances, and it is possible to detect a failure factor in a rotating machine early and appropriately and contribute to maintenance of the rotating machine and improvement of reliability. An object is to provide a diagnostic device for a rotating machine.

[0013]

SUMMARY OF THE INVENTION The present invention is based on the idea of a rotating machine.
Phenomena that detect the amount of physical mechanical phenomena required for judgment of fault diagnosis
Quantity detection means and the phenomenon detected by this quantity detection means
And behavior amount and recording means for recording the diagnostic history data of normal and abnormal operating conditions of the rotary machine based on the phenomenon amount, before
The phenomenon amount detected by the phenomenon amount detecting means
Based on the history of the amount of past phenomena recorded in the column, it is compared with a preset reference index to determine whether a predetermined failure factor event has been established, and whether the event caused by the failure factor has been established.
On the other hand, it is provided with an arithmetic means for diagnosing normality / abnormality of the operating state of the rotating machine by comparing the total points given according to the importance of the event with a preset decision point. And

[0014]

In the diagnostic apparatus for a rotating machine having such a configuration, the failure factor is determined to be satisfied in a wide range by determining the sum of the points given by the occurrence of the event with respect to the assumed failure factor. It is possible to accurately diagnose the operating state of the rotating machine.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of a rotary machine diagnostic device according to the present invention. As shown in FIG. 1, the diagnostic apparatus for a rotary machine of this embodiment is composed of a phenomenon amount detecting means 31, a specific phenomenon amount detecting means 32, a recording means 33 and a computing means 34.

The phenomenon amount detecting means 31 detects a phenomenon amount necessary for the determination of a failure among physical mechanical phenomenon amounts such as the number of revolutions, the output, and the shaft vibration, which are generated as a result of the operation of the rotary machine 30. The specific phenomenon amount detection means 32 detects a preselected specific physical mechanical phenomenon amount that is particularly necessary in the determination process of failure diagnosis. The recording means 33 records the phenomenon amount detected by the phenomenon amount detecting means 31 and the specific phenomenon amount detected by the specific phenomenon amount detecting means 32, and further the operating state of the rotary machine based on these phenomenon amount and the specific phenomenon amount by the calculating means 34. Record normal and abnormal diagnosis history data of. The calculating means 34 includes a phenomenon amount constantly detected by the phenomenon amount detecting means 31 and a specific phenomenon amount detecting means 32.
From the specific phenomenon amount detected at any time by the history and the history of past phenomenon amounts recorded by the recording means 33, the rotary machine 3
The establishment of an event caused by a failure cause such as an abnormality or a failure in 0 is determined.

Further, the computing means 34 assigns points in advance to the establishment of an event caused by a failure factor in accordance with the importance of the event, and determines the sum of the scores of the established events and the failure factor establishment. For this reason, the preset points are compared with each other, and when the total points exceed the reference points, the failure factor is determined to be established, and the occurrence of an abnormality in the operating state of the rotating machine 30 is determined and diagnosed.

Next, the operation when the diagnostic apparatus for a rotating machine configured as described above is applied to a pumped-storage power generator is shown in FIG.
It will be described with reference to FIGS. In the pumped storage power generator diagnostic apparatus to which the present embodiment is applied, after selecting a failure factor to be diagnosed, extraction of an event caused by the failure factor and determination of a detection unit for detecting the event are performed in advance. Done. First, after extracting failure factors based on factor analysis, select failure factors that may have a significant impact on the sound operation of the pumped-storage power generator, such as defective rotating parts and defective bearing lubrication, as targets for diagnosis. To do. After this, the events that appear due to the occurrence of individual failure factors are analyzed and the means for event detection is determined.

Here, as an example of the cause of failure, the defect of the rotating portion will be taken up and the means for detecting the establishment of the event in this embodiment will be described. Figure 2 is of the behavior analysis diagram classifying effect of how the failure factor in pumping power generator, a part related to the rotating portion deficiency, caused by a failure factor of the rotation unit defect such as shaft vibration excessive and bearing lubricating oil temperature rise This is a tree diagram in which events that are predicted are classified based on the principle of occurrence.

Further, when the event resulting from the failure factor is extracted, the detecting means for the event is determined for each event, and the detecting means is equipped with this detecting means. This detection means is classified into one that constantly monitors a rotating machine to detect a symptomatic general event, and one that is performed as necessary to detect an event related to a specific failure factor.

Therefore, the diagnostic device is provided with the phenomenon amount detecting means 31 shown in FIG. 1 as the former. For example, the detection of the event of excessive shaft vibration is performed by measuring the amplitude of shaft vibration in the pumped-storage generator main shaft and comparing it with a limit value set in advance for the amplitude of shaft vibration to determine excessive shaft vibration. , When the measured value exceeds the limit value.
Excessive shaft vibration is easy to catch as a symptomatic event that appears sensitively to the occurrence of a failure factor, so the diagnostic device is equipped with a non-contact displacement sensor as a phenomenon amount detection means for measuring the amplitude of shaft vibration. At the same time, the limit value for determining the excessive vibration is set. For abnormal sounds such as those that are not constantly monitored, the measurement method and determination method are determined.

FIG. 3 shows a schematic configuration of the pumped-storage power generator for explaining the phenomenon amount detection means in the diagnostic device for the pumped-storage power generator thus determined. In FIG. 3, the turbine side is provided with a runner 1, a draft tube 2, a spiral casing 3, a guide vane 4 provided in a flow path communicating between the runner and the casing, and an upper cover 5 for covering the runner portion, and a generator. The side is provided with a stator (not shown) and a generator rotor 8 provided in the stator, and a rotor shaft and a bearing that are movably supported by an upper guide bearing 9a, a lower guide bearing 9b and a thrust bearing 9c. Spindle 6 of runner 1 supported by 9d
And are connected in a vertical axis type via a coupling 7.

In the pumped-storage power generator having such a structure, the acceleration sensor 10 is provided on the surface of the upper cover 55 and the vibration acceleration of the upper cover 5 is measured. Generator upper guide bearing 9
a , non-contact type deviation sensors 11a, 11b and 11c are provided on the stationary side in the two directions orthogonal to the main shaft 6 in the vicinity of the a , the lower bearing 9b and the water turbine guide bearing 6c, and the vibration displacement of each part of the main shaft is measured. Further, the main shaft 6 is provided with a key phasor using a reflection tape for detecting the number of rotations and the phase of the main shaft vibration, and the optical rotation pulse detector 12 is used to detect the rotation pulse. The number of rotations is given a positive / negative sign to distinguish the direction of power generation or pumping. As a result, the information on the driving direction can be handled by including it in the information on the number of revolutions, so that the number of state quantities can be reduced. Moreover, the lubricating oil temperature of each bearing is measured by the thermocouple provided in each of the generator upper guide bearing 9a, the generator lower guide bearing 9b, the thrust bearing 9c, and the water turbine guide bearing 9d.

Further, in the pumped-storage power generator diagnostic apparatus according to the present embodiment, as the amount of phenomena, the rotational speed, the output of the generator motor, the active or reactive power, the phase adjusting current, the static head, and the bearing lubricating oil supply temperature are constantly monitored. The amount of these phenomena is obtained from the operation control panel of the generator and the water turbine. The output of the generator motor, active power, phasing current, etc. are detected from the operation control panel of the generator motor. The head is detected from the operation control panel of the turbine.

By the way, the pumped storage power plant is usually unmanned due to its geographical condition, and the pumped storage power generator is generally operated remotely from the central control station, and the detection of various phenomena is collectively performed. Is extremely difficult. Therefore, in addition to the above-described means for detecting symptomatic general events (hereinafter referred to as stage (A)), the operator of the diagnostic device directly performs (B) confirmation of past vibration value trends. , (C) It is possible to carry out during operation without stopping the pumped-storage generator like an abnormal sound, but it is necessary for the worker to go to the installation site and carry out, and (D) Check for the missing parts. The specific phenomenon amount detection is staged in stages such as those that require the suspension of the pumped storage generator and (E) those that involve the suspension and disassembly of the pumped storage generator, such as the confirmation of runner deficiency. It is carried out at any time according to the progress of.

Of the phenomenon amount detection stages including the phenomenon amount detection of symptomatic general events, the stages (A), (B) and (C) can be handled by the user (user) of the pumped storage generator. is there. On the other hand, although the step (D) can be partially implemented by the user, it requires the assistance of the manufacturer (manufacturer) of the pumped-storage power generator.
Is implemented by the manufacturer.

Next, the process of determining the establishment of the factor, which is carried out by using the quantities obtained by the phenomenon amount detecting means and the specific phenomenon amount detecting means described above, will be described by taking as an example the case where a rotating portion defect occurs as a failure factor. To do.

As shown in FIG. 2, the physico-mechanical phenomenon caused by the defect of the rotating part is (1) increase of imbalance,
(2) Scattering and (3) Deformation
These are two-dimensional causes and cannot be directly captured as an event, and a secondary phenomenon derived from them is detected as an event due to a rotating part defect. These events are detected in multiple stages. For this reason,
It is necessary to classify at the stage of detecting an event.

In FIG. 2, the event to be detected is surrounded by a double box and the symbols A to E of the classified stages are shown in the upper left of the box. If the rotating portion is damaged, first, as a step (A), a symptomatic event such as excessive shaft vibration or high bearing lubricating oil temperature is automatically detected by the phenomenon amount detecting means. If the detection step is advanced to the step (B) by the determination described later, as the step (B), reference is made to the values of the current shaft vibration and the upper cover vibration and the past record regarding the increase of the shaft vibration rotation synchronization component and the increase of the upper cover vibration. Judge from. At this stage, the amount of phenomena required for judgment is all inside the diagnostic device, so it can be implemented by the operator of the diagnostic device, and some of them are automatically adjusted by the diagnostic device, and the judgment result is reported to the operator. To be done.

When the detection stage is advanced due to the establishment of an event, as a stage (C), the worker is dispatched to the installation location of the pumped storage power generator and the investigation is conducted on the spot. Abnormal noises such as rolling noises, friction noises, collision noises, wind noises, sparks, and odors can be perceptually detected even during driving. Abnormal noise can also be quantitatively detected by measuring the noise level using a measuring instrument or analyzing the frequency of the noise. The vibration of the stationary part is also measured and the increase is detected in comparison with past records. In stage (D), the main engine of the pumped storage power generator is stopped and then an in-machine inspection is performed to check for contact marks, deformation of rotating parts, and the presence of scattered objects. The removal of the coupling cover attached to the coupling 7 is discovered at this point.

Further, in the step (E), the water in the spiral casing is drained and the pumped-storage generator is disassembled for detailed investigation. A runner's defect, etc., cannot be identified unless water is extracted and an investigator enters the casing for inspection.

The pumping water generator diagnostic apparatus according to the present embodiment is
Starting with the detection of symptomatic events for failure factors, the detection means necessary for detecting the failure factors and the selection of the amount of phenomenon are selected at each of the above-mentioned detection stages, and then the failure factor establishment determination is repeated and the final determination is made. It will reach the discovery of failure factors. In each detection stage, the diagnostic device determines the event necessary for determining the establishment of the failure factor, and therefore requests the operator of the diagnostic device to input the amount of phenomenon for detecting the event establishment. In this case, the diagnostic device has a function of instructing a detection means for detecting the phenomenon amount and a method of executing the detection means for detecting the phenomenon amount as needed, and guiding the operator to perform accurate diagnosis. . Here, the amount of phenomenon for determining event establishment does not necessarily have to be a continuous amount. For example, for an event “absence of abnormal noise”, 1 = “yes”, 0 =
There is no problem even if the answer is "No".

In response to a request for the amount of phenomenon of the diagnostic device, the operator detects the amount of phenomenon using the detecting means provided in the diagnostic device and inputs it to the diagnostic device. It is determined whether or not the event is established by comparison with the determination value set for the phenomenon amount. At each detection stage, points are given in advance according to the degree of dependence on the failure factor for the event establishment, and if the total points of the established events exceed this reference point, the possibility of establishment of the failure factor at the detection stage is determined. Make a decision and proceed with the diagnosis in the next investigation stage. If the total score of the established events does not reach the reference point, the establishment of the failure factor in the detection stage is denied, and this failure factor is excluded from the subsequent diagnosis process. By repeating this operation at each detection stage for each failure factor, the establishment of the failure factor is finally determined.

A specific description will be given of the above-described determination process regarding the loss of the rotating part in the pumped-storage power generator. FIG. 4 shows the points given to the establishment of an event and the judgment reference points at each detection stage. In FIG. 4, in stage A, 10 points and 5 points are assigned to two events of excessive shaft vibration and high bearing lubricating oil temperature, respectively, according to the degree of dependence on the failure factor. That is, when the vibration value of the shaft vibration increases and exceeds the determination reference value, and the event establishment is detected for the event of excessive shaft vibration, 10 points are added to the stage (A). Similarly, if a high bearing lubricating oil temperature is detected, 5 points are added to the stage (A), resulting in a total of 15 points.

By the way, the reference point for the failure factor determination in the stage (A) is 10 points, and the total point of the above event establishment is 1 point.
Since 5 points exceed this reference point, the process proceeds to the next detection step (B). However, when the bearing lubricating oil temperature high, which has a low dependency on the cause of failure, is independently established, the total event establishment point does not reach the reference point, so detection does not proceed to step (B) and the rotating part loss is detected. It is excluded from the target of failure factor determination. Also in the stage (B), 10 and 5 points are assigned to the two target events, that is, the increase of the shaft vibration rotation synchronization component and the increase of the upper cover vibration, respectively.

Further, 20 points are set as reference points for the failure factor determination in the step (B). Here, the total points of the established events are based on the accumulation of the total points so far. That is, the score of the successful event in the stage (B) is added to the total score in the stage (A) and used for the determination, and the score of the successful event is added to the total score up to that point in accordance with the progress of the detection stage. The progress of the detection stage will be decided based on the comparison with the judgment criteria of.

Although the method of making a judgment on the accumulation of total points is taken here, if it is desired to give importance to the judgment at each detection step, a method of making a judgment on the total points at each detection step may be adopted. .

By repeating the detection and determination as described above and reaching the step (E), the defect of the rotating portion is finally detected as the cause of the failure. Here, only the defect of the rotating portion is taken out as the cause of the failure for explanation. However, other failure factors are investigated simultaneously in parallel with the establishment of the same symptomatic event. For example, in the case of excessive shaft vibration, failure factors such as increase in hydraulic excitation force acting on the runner and faulty mounting of stationary parts are detected / determined in addition to loss of rotating parts, and the failure factors are established or not established. (Exclusion from detection / judgment process) is judged.

In the above detection / judgment process, only the event due to the failure factor is investigated / judged, but an event denying the establishment of the failure factor is detected and incorporated by giving a negative dotted line. It is also possible.
In a pumped-storage generator, since there is a strong correlation between the shaft vibration and the output of the generator, for example, the stage (A) or (B)
If the operation condition detecting means establishes an event of an increase in the generator output, -5 points are given to deduct the total points for the event establishment. Further, it is also possible to represent the score for the establishment of an event as a function of the amount of phenomenon that determines the establishment of the event, instead of a constant value.

Further, the history of the diagnostic results is recorded in the recording means 3 together with the score of event establishment and the amount of event establishment in the judgment process.
Recorded by 3. Since the degree of soundness of the rotating machine can be predicted from the tendency of the diagnosis history, the diagnosis result can be used for formulating the inspection schedule from the viewpoint of preventive maintenance.

As described above, the pumping-storage power generator diagnostic apparatus according to the present embodiment compares the total points given to the establishment of an event with the reference point for determination set for each stage. Since it is determined whether or not the failure factor is established, the accuracy of the diagnosis result is large at these points. For this reason, the diagnostic apparatus of this embodiment is provided with a function of correcting the score of event establishment or the judgment reference point when an error occurs in the diagnostic process.
In the case of correction of the score of event establishment, the score of event establishment is set higher, and the final score is adjusted by making corrections to the above-mentioned points so that correct judgment can be made through the operation of the pumped storage generator during trial operation. decide. In the case of correction of the judgment reference point, the judgment reference point is set lower, and similarly the final judgment reference point is set through the operation of the pumped storage power generator. This setting process is incorporated in the calculation means of the diagnostic device, but if the score of event establishment or the judgment reference point converges to an appropriate value, the correction process ends. The process of setting the score of event establishment and the determination reference point can be regarded as a learning process for the diagnostic device.

As described above, in the conventional diagnosing device for a rotating machine, the change in the characteristic amount of a phenomenon which appears due to an abnormality or a failure is individually detected by comparing the amount of the phenomenon with a preset abnormality judgment value. Since it is judged as abnormal, it is difficult to completely identify the cause of failure, and it also issues an excessive warning,
On the contrary, there was a serious defect that the abnormality of the rotating machine could not always be accurately determined, such as overlooking the abnormality, but the diagnostic device according to the present embodiment executes the detection stepwise. Since the determination of the establishment of the failure factor is sequentially repeated to finally identify the failure factor, it is possible to highly accurately determine the abnormality, the failure or the failure in the rotating machine.

Next, another embodiment of the present invention will be described. FIG. 5 is a block diagram showing the configuration of another embodiment of the present invention. The same parts as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. Only different points will be described here. In the present embodiment, among the functions of the calculating means 34 shown in FIG. 1, the function of detecting a symptom phenomenon is separated and the calculating means 34a is made independent, and the determination process is performed stepwise according to the detection step. This is performed by the calculation means 34b.

By adopting such a configuration, the detection function can be distributed. However, since the pumped storage power plant remotely operates unmanned pumped storage power generators from the central control station as described above, if one diagnostic device is installed for each pumped storage power generator, a large number of diagnostic devices will be installed. Have to manage.

Therefore, as shown in FIG. 6, the phenomenon amount detecting means 31 and the specific phenomenon amount detecting means 32 are provided for the rotary electric machines of a plurality of pumped storage power stations under the control of one central operation place.
And a recording means 33a for recording the history of the amount of phenomenon of the installed pumped-storage power generator, and a computing means 3 for judging a symptomatic phenomenon.
4a are provided respectively, and only one set of arithmetic means 34b for judging the establishment of a failure factor and recording means 33b for recording the history of the overall diagnosis result are installed at the central operating station, thereby providing the entire system. There is an advantage that can be rationalized.

When a plurality of pumped storage generators are installed in the same power plant, the phenomenon amount detecting means 31, the specific phenomenon amount detecting means 32, and the calculating means 34a are individually set for each generator. And one computing means 34b at the power plant
It is also possible to provide for the detection of symptomatic events for each generator. In this case, the influence of mutual vibration between the generators can be commonly detected, so that the detection can be performed in consideration of the influence from other generators. In addition, the diagnostic means for all the generators under the control of the central control station is operated by the computing means 34b.
It is possible to use it for formulating a maintenance plan such as adjusting the inspection schedule, and it can greatly contribute to the overall maintenance of the power plant.

[0047]

As described above, according to the present invention, it is possible to determine the establishment of a failure factor with respect to an assumed failure factor based on the sum of the points given by the event establishment. It is possible to provide an extremely reliable diagnostic apparatus for a rotary machine that can accurately and early detect and identify a wide range of failure factors in, and contribute to maintenance and reliability improvement of the rotary machine.

[Brief description of drawings]

FIG. 1 is a block configuration diagram showing an embodiment of a rotary machine diagnosis apparatus according to the present invention.

FIG. 2 is an explanatory diagram of a portion related to a rotating part defect in an abnormal event distribution diagram in a pumped storage power generator.

FIG. 3 is a configuration diagram for explaining detection of a phenomenon amount of a pumped storage generator in the embodiment.

FIG. 4 is a list view of scores for event determination and determination reference points in an investigation stage in the example.

FIG. 5 is a block diagram showing another embodiment of the rotary machine diagnostic apparatus according to the present invention.

FIG. 6 is a block diagram showing the overall system configuration when the diagnostic device shown in FIG. 5 is arranged corresponding to a plurality of pumped-storage generators.

FIG. 7 is an explanatory diagram of an abnormality determination value in a conventional rotating machine diagnostic device.

[Explanation of symbols]

1 ... Runner, 2 ... Draft tube, 3 ... Spiral casing, 4 ... Guide vane, 5 ... Top cover, 6 ...
Main shaft, 7 ... Coupling, 8 ... Generator rotor, 9a ... Generator upper guide bearing, 9b ... Generator lower guide bearing, 6
c ... Thrust bearing, 9d ... Hydro turbine guide bearing, 10 ... Acceleration sensor, 11 ... Non-contact type displacement sensor, 12 ... Optical rotation pulse detector, 30 ... Rotating machine, 31 ... Phenomenon amount detecting means, 32 ... Specific phenomenon amount Detection means, 33, 33a, 33
b ... recording means, 34, 34a, 34b ... computing means.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masayuki Masayuki 2-4, Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Inside the Keihin Office of Toshiba Corporation (72) Ichinori Toda 1-1-1, Shibaura, Minato-ku, Tokyo No. 1 Stock company Toshiba Head Office (72) Inventor Masatoshi Ando 2-4 Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Keihin Works, Toshiba Corporation (72) Inventor Shinsaku Sato Suehiro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa 2-4, Toshiba Corp. Keihin Works (56) Reference JP-A-6-241955 (JP, A) JP-A-3-277939 (JP, A) (58) Fields investigated (Int.Cl. ⁷⁾ , DB name) G01H 17/00 G01M 19/00 G05B 23/02 302

Claims (4)

(57) [Claims] 1. A physics necessary for determining a failure diagnosis of a rotating machine.
A phenomenon amount detecting means for detecting a mechanical phenomenon amount, a phenomenon amount detected by the phenomenon amount detecting means, and
Recording means for recording diagnosis history data of normal / abnormal operation state of the rotating machine based on the image quantity, and the phenomenon quantity detected by the phenomenon quantity detecting means.
Based on the history of the amount of past phenomena recorded in the means, it is determined whether or not a predetermined failure factor event is established by comparing with a preset reference index, and the occurrence of an event caused by the failure factor is established.
On the other hand, it is provided with an arithmetic means for diagnosing normality / abnormality of the operating state of the rotating machine by comparing the total points given according to the importance of the event with a preset determination point. Characteristic rotary machine diagnostic device. 2. The rotating machine diagnostic device according to claim 1, wherein the reference index is a predetermined function. 3. The diagnostic apparatus for a rotary machine according to claim 1, wherein the arithmetic means has a function of correcting the reference index and the determination point. 4. The diagnosis is performed stepwise.
5. The diagnostic device for a rotary machine according to any one of items 1 to 3.