JP2002099320A - Method and system for diagnosing rotary machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a system for diagnosing rotary machine which can suitably diagnose the operating state of rotary machine and can easily prevent the occurrence of an abnormality in a rotary machine, and can speedily deal with the occurrence of an abnormality in the rotary machine afterwards. SOLUTION: In the system for diagnosing rotary machine, a computer on the user side of the rotary machine and a server machine on the maker side are connected in the form of computer network. In the method for diagnosing rotary machine, data on the operating state of the rotary machine are inputted to the user side computer, these data or data processing these data are transmitted through the computer network to the maker side server machine, and the operating state of the rotary machine is diagnosed on the basis of these data and the result of this diagnosis is transmitted from the server machine through the network to the computer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention belongs to the technical field of a method and a system for diagnosing a rotating machine, and more particularly to a method and a system of diagnosing an operating state of a rotating machine. The present invention belongs to a technical field related to a method and a system for diagnosing the presence or absence of a machine abnormality.

[0002]

2. Description of the Related Art A rotary machine used in a plant or the like is an important machine. Therefore, in order to improve its reliability and operation rate, the state quantity is constantly monitored by various sensors or the state quantity is periodically monitored. Monitoring is taking place. At this time, the measured state quantities are generally vibration, noise, temperature, rotation speed, pressure, flow rate, and the like. In particular, information on vibration, noise, and temperature is often used for diagnosing the state of a rotating machine. .

[0003]

In some plants, there is a specialized machine diagnosticist who can perform detailed data analysis and evaluation and diagnose a machine. However, in most cases, the level change of the measured state quantity is generally monitored, and usually an alarm value or trip value is set in advance, and logic such as turning on a warning lamp or stopping the operation of a machine is performed. They are often assembled, and in this case, there are the following problems.

If it takes time to estimate the location of a machine failure or arrange replacement parts after the occurrence of an alarm or trip, it may not be possible to respond quickly.

In the method based on monitoring the level change of the state quantity of the machine, it is possible to estimate the occurrence of the abnormality of the machine.
It is difficult to estimate the cause, and it is often the case that a machine maker is requested to make a judgment on the cause of an abnormality and a countermeasure. On the other hand, even for the machine maker who is requested to make this determination, there are many cases where information on the level change of the state quantity of the machine alone is not sufficient in diagnosing the machine. Analytical data and multifaceted data are required, and it is necessary to request the user of the machine for the data or to send a person from the machine maker to collect the data again.

The present invention has been made in view of such circumstances, and an object of the present invention is to make it possible to appropriately diagnose an operating state of a rotating machine, and furthermore, to generate an abnormality in the rotating machine. It is an object of the present invention to provide a method and system for diagnosing a rotating machine, which makes it easier to prevent the occurrence of an abnormality in the rotating machine and can quickly respond to the occurrence of an abnormality in the rotating machine.

[0007]

In order to achieve the above object, a method and a system for diagnosing a rotating machine according to the present invention are described. The diagnostic system for a rotating machine described above has the following configuration.

[0008] That is, in the method for diagnosing a rotating machine according to the first aspect, the data relating to the operating state of the rotating machine is measured and obtained, the data is input to a computer, and the data or the data is processed. Data is transmitted to the server via a computer network as diagnostic data relating to the operating state of the rotary machine, and the operating state of the rotary machine is diagnosed based on the diagnostic data.The result of the diagnosis is transmitted from the server. A method of diagnosing a rotating machine, wherein the method is transmitted to the computer via the computer network (first invention). Diagnostic method for a rotary machine according to claim 8, wherein, upon diagnosing the operation state of the rotating machine, to obtain information from a database having information for diagnosis of the operating state of the rotary machine, the rotary machine of this information The diagnostic method for a rotating machine according to claim 1, wherein the operating state of the rotating machine is diagnosed in consideration of diagnostic data on the operating state of the rotating machine (an eighth invention).

A diagnostic system for a rotary machine according to a second aspect of the present invention has a measuring means for measuring and obtaining data on an operating state of the rotary machine, and receives data on the operating state of the rotary machine, and inputs the data or the data. A computer that outputs data obtained by processing as diagnostic data related to the operating state of the rotating machine, and diagnostic data related to the operating state of the rotating machine are input,
A second aspect of the present invention provides a diagnostic system for a rotary machine, wherein the server that outputs a result of the diagnosis of the operating state of the rotary machine includes a computer network that is connected through a communication network (second invention). .

According to a third aspect of the present invention, in the rotating machine diagnosis system, the server machine includes means for diagnosing the operating state of the rotary machine based on diagnostic data on the operating state of the rotary machine. This is a machine diagnostic system (third invention). According to a fourth aspect of the present invention, there is provided a rotating machine diagnosis system according to the second or third aspect, wherein data relating to an operating state of the rotating machine is input continuously or at set time intervals. ).

According to a fifth aspect of the present invention, in the diagnostic system for a rotating machine, the diagnostic data relating to the operating state of the rotating machine is a frequency spectrum of vibration or gas pressure of the rotating machine. (Fifth invention).

The diagnostic system for a rotary machine according to claim 6, further comprising a system for changing an operation control condition of the rotary machine based on a result of diagnosis of an operation state of the rotary machine. It is a diagnostic system of the rotary machine as described in (6th invention). The system for diagnosing a rotating machine according to claim 7, wherein when the computer receives a result of the diagnosis of the operating state of the rotating machine from the server machine, a user of the rotating machine is charged based on the result of the diagnosis. The diagnostic system for a rotary machine according to claim 2, 3, 4, 5, or 6, further comprising:

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is embodied in the following manner, for example. The rotating machine is provided with measuring means for measuring and obtaining data on the operating state of the rotating machine. In addition, data relating to the operating state of the rotary machine is input to a control room in a factory where the rotary machine is installed, an office of a user of the rotary machine, or the like, and is obtained by processing the data or the data. A computer (user-side computer) that outputs the obtained data as diagnostic data relating to the operating state of the rotating machine, while diagnostic data relating to the operating state of the rotating machine is provided in an office of a manufacturer of the rotating machine. A server (manufacturer-side server) that receives the input and outputs a result of the diagnosis of the operating state of the rotating machine is installed, and a computer network is formed by connecting the computer and the server via a communication network. Let it.
Then, a diagnostic system for a rotating machine according to the present invention is obtained.

The diagnostic system for a rotating machine according to the present invention thus obtained is used as follows. That is,
The measuring means measures and obtains data on the operating state of the rotating machine, inputs the data to the computer (user-side computer), and processes the data or the data obtained by processing the data to obtain the data of the rotating machine. The server transmits the diagnostic data on the operating state to the server machine (server on the maker side) via the computer network, diagnoses the operating state of the rotary machine based on the diagnostic data, and transmits the result of the diagnosis to the server. Machine (manufacturer side) to the computer (user side) via the computer network.

In such a form, the diagnostic system for a rotary machine according to the present invention is obtained, and the diagnostic method for a rotary machine according to the present invention is implemented.

Hereinafter, the function and effect of the present invention will be mainly described.

As described above, the method for diagnosing a rotating machine according to the present invention measures and obtains data relating to the operating state of the rotating machine, inputs the data to a computer, and processes the data or the data. The data transmitted to the server machine via a computer network as diagnostic data relating to the operating state of the rotating machine, the operating state of the rotating machine is diagnosed based on the diagnostic data, and the result of the diagnosis is transmitted to the server machine. To the computer via the computer network (first invention).

Therefore, according to the method for diagnosing a rotary machine according to the present invention, the server can receive the diagnostic data on the operating state of the rotary machine in real time, always, periodically, or whenever necessary. Based on the diagnostic data, the operating state of the rotating machine can be diagnosed by diagnosis by means such as an expert of the manufacturer of the rotating machine or a program for diagnosing the operating state of the rotating machine. Appropriate diagnosis of the condition can be made. Then, the result of this diagnosis can be obtained by the user of the rotating machine immediately after the diagnosis. For this reason, it is easy to prevent the occurrence of an abnormality in the rotating machine, and it is possible to quickly respond after the occurrence of the abnormality in the rotating machine.

In addition, since the manufacturer of the rotating machine can obtain diagnostic data on the operating state of the rotating machine for a long period of time, it is easy to grasp the normal state of the rotating machine and the process of changing the state. It becomes possible to make a more appropriate diagnosis, it becomes easier to make a suggestion regarding maintenance of the rotating machine to the user side, and it is further easier to prevent the occurrence of an abnormality in the rotating machine, and There is an advantage that when an abnormality occurs in the rotating machine, a more rapid response can be made.

The server machine can receive diagnostic data relating to the operating states of a plurality of rotating machines. In this case, it is possible to collect data on the operating state of a plurality of rotating machines under various operating conditions, and these data are often useful for diagnosis of the operating state of the rotating machine. There is an advantage that the diagnosis of the condition can be made easier and a more appropriate diagnosis can be made.

The diagnostic system for a rotating machine according to the present invention comprises:
As described above, in addition to having measurement means for measuring and obtaining data relating to the operating state of the rotating machine, data relating to the operating state of the rotating machine is input, and the data or data obtained by processing the data is converted to the rotational speed. A computer that outputs as diagnostic data regarding the operating state of the machine, and a server device that receives diagnostic data regarding the operating state of the rotating machine and outputs a result of diagnosis of the operating state of the rotating machine, via a communication network (Second invention).

Therefore, according to the rotary machine diagnostic system of the present invention, the above-described rotary machine diagnostic method of the present invention can be performed. That is, the measuring means measures and obtains data on the operating state of the rotating machine, inputs the data to the computer, and processes the data or the data obtained by processing the data to diagnose the operating state of the rotating machine. Data to the server via the computer network, and diagnoses the operating state of the rotating machine based on the diagnostic data.The result of the diagnosis is transmitted from the server to the computer via the computer network. Can be sent. For this reason, it is possible to make an appropriate diagnosis of the operating state of the rotating machine, and it is easy to prevent the occurrence of an abnormality in the rotating machine, and to take prompt action after the occurrence of the abnormality in the rotating machine. It becomes possible.

The diagnosis of the operating state of the rotating machine may be performed by a person such as an expert of the manufacturer of the rotating machine, or may be performed by means such as a program for diagnosing the operating state of the rotating machine. The latter means for diagnosing the operating state of the rotating machine may be provided in the server machine. In this case, the server machine receives the diagnostic data on the operating state of the rotating machine, It has a function of diagnosing the operating state and transmitting the result of this diagnosis (third invention).

If data on the operating state of the rotating machine is input continuously or at set time intervals, a time-series change can be confirmed, and a more appropriate diagnosis can be made. 4 inventions).

Preferably, the diagnostic data relating to the operating state of the rotating machine is a frequency spectrum of vibration or gas pressure of the rotating machine (fifth invention). This is a problem in that the conventional method only monitoring the level change of the state quantity of the machine can estimate the occurrence of the abnormality of the machine as described above, but it is difficult to estimate the cause. However, according to the frequency spectrum of the vibration and the gas pressure, such a problem can be solved, and it becomes easy to estimate the cause of the abnormality of the rotating machine. That is, the position (frequency) of the peak of the frequency spectrum of the vibration or gas pressure differs depending on the location of the failure or the degree of the failure in the rotating machine, and the cause of the failure can be estimated from the position of the peak. That is because Note that the frequency spectrum of vibration is a spectrum obtained by dividing the amplitude of vibration by the magnitude of frequency (frequency). The frequency spectrum of the vibration is obtained by frequency analysis of the vibration. FIG. 4 shows an example of the frequency spectrum of the vibration.

If a system for changing the operation control conditions of the rotating machine is provided based on the result of the diagnosis of the operating state of the rotating machine, a change in the operating state of the rotating machine can be estimated, and a problem that may occur can be estimated. Since it is possible to foresee and actively change the operation control conditions, it is possible to prevent the occurrence of the above-mentioned problem (sixth invention). For example, if the rotating machine is a centrifugal compressor, the operating state data used for diagnosis includes at least one of gas pressure, temperature, flow rate, and power, and surging as a problem that can be prevented.

When the computer receives a result of the diagnosis of the operating state of the rotary machine from the server machine, a system is provided in which a user of the rotary machine is charged based on the result of the diagnosis. It is possible to charge at the same time when the result of the diagnosis is transmitted (the seventh invention).

In diagnosing the operating state of the rotating machine, information is obtained from a database having information for diagnosing the operating state of the rotating machine, and this information is added to diagnostic data relating to the operating state of the rotating machine. By diagnosing the operating state of the rotating machine in this way, it is possible to more appropriately diagnose the operating state of the rotating machine more quickly (the eighth invention).

In the present invention, the data obtained by processing data input to the computer is data obtained by calculation or logical processing by the computer based on the data input to the computer. .

[0030]

Embodiments of the present invention will be described below. Note that the present invention is not limited to this embodiment.

FIG. 1 shows an outline of a diagnostic system for a rotating machine according to an embodiment of the present invention. In this diagnostic system, as shown in FIG. 1, the rotating machine is a compressor, and the compressor is provided with measuring means for measuring and obtaining data relating to the operating state of the compressor. ), A computer (user-side computer) that receives data relating to the operating state of the compressor and outputs the data or data obtained by processing the data as diagnostic data relating to the operating state of the compressor. ) Is installed, on the other hand, a computer (manufacturer) as a server machine to which diagnostic data relating to the operating state of the compressor is input into the office of the compressor manufacturer and outputs a result of the diagnosis of the operating state of the compressor. Side computer), and connects the user side computer and the maker side computer (server machine) via a communication network. Connected allowed in which to form a computer network.

At this time, a vibrometer, a tachometer, a thermometer, a pressure gauge, a flow meter, and a dynamometer are provided as measuring means for measuring and obtaining data relating to the operating state of the compressor.

The compressor was diagnosed using the diagnostic system for the rotary machine (compressor) according to the above embodiment. The details will be described below.

The measuring means (vibrometer, tachometer, thermometer,
Data on the operating state of the compressor is measured and obtained by a pressure gauge, a flow meter, and a dynamometer, and this data is input to the user-side computer and recorded. At this time, the data to be recorded is the average value data measured every specific time, but the data related to vibration is time-series data continuously measured until the specific number of samples is reached every specific time. Is also recorded at the same time. The input of the data measured by the measuring means to the user-side computer is not limited to manual and artificial input by the user himself. A configuration may be employed in which mechanically and automatically measured data is input from the measurement means to the user-side computer via an AD converter or the like.

At specific time intervals, or when either the vibration data or the bearing temperature data exceeds an alarm value set for each,
Along with the data recorded in the user-side computer, the machine number and model of the compressor, the date and time of occurrence of the phenomenon, and the like are transmitted to the maker-side server via a computer network, and received by the maker-side server.
The alarm value is set in advance when the compressor is delivered. In addition, the bearing described below indicates a so-called rolling bearing.

An expert on the maker side of the compressor diagnoses the operating state of the compressor based on the data and other information received by the server on the maker side. That is, it is determined whether the compressor is normal or abnormal based on the results of frequency analysis of the bearing temperature and vibration amplitude, and the frequency analysis of vibration and gas pressure. Make recommendations. Here, the diagnosis of the operating state of the compressor is not limited to the diagnosis by the expert on the manufacturer side as described above. The same diagnosis may be automatically performed by the maker server.

The result of the diagnosis is transmitted from the server on the manufacturer side to the computer on the user side via a computer network.

FIG. 2 shows an example of data relating to the change over time in the amplitude of vibration among the data received by the server on the manufacturer side.
Shown in FIGS. 3 to 5 show the results of the frequency analysis of the vibration performed based on the data shown in FIG. 2, that is, the frequency spectrum of the vibration. 3 is a frequency spectrum of the vibration at the time shown in FIG. 2, FIG. 4 is a frequency spectrum of the vibration at the time shown in FIG. 2, and FIG. It is a frequency spectrum of a signal.

When an abnormality occurs in the operating state of the rotating machine,
It often appears as a change in vibration. For example, if the balance state of the rotating shaft changes, the amplitude and phase of vibration synchronized with the number of rotations change, and if the bearing or gear is damaged, vibration of a frequency corresponding to the defect occurs. In the case of self-excited vibration caused by fluid force generated by a rotating machine,
Vibration occurs at a frequency corresponding to the natural frequency of the shaft system.

The data on the change over time of the amplitude of the vibration shown in FIG. 2 indicates that the amplitude increases with the passage of time. However, this amplitude is obtained by synthesizing vibrations having various frequencies, and the type and degree of the vibration due to the occurrence of the abnormality are not known.

From the frequency spectrum of the vibration shown in FIG. 3, a peak (left side in the figure) due to vibration of a frequency (frequency) synchronized with the operation rotation speed is recognized in time, and vibrations of other frequencies (in the figure) (Right side) is hardly recognized, and it can be seen that, in time, the vibration at the frequency (frequency) according to the operation speed is the main, and it is in a normal state.

From the frequency spectrum of the vibration shown in FIG. 4, not only a peak due to the vibration synchronized with the operating rotational speed (left side in the figure) is recognized in time,
Peaks due to vibrations of other frequencies (right side in the figure) were also observed, and this vibration has started to increase. The position (frequency), height, and area (integral value of the frequency spectrum) of the peak (right side in the figure) due to this vibration ), It can be estimated that an initial abnormality of the bearing has occurred.

When the bearing is damaged, the characteristic of the vibration can be further shown by performing the frequency analysis after performing the envelope processing on the vibration signal in some cases. From the frequency spectrum of FIG. 5, a vibration peak at a frequency corresponding to a bearing defect is remarkably observed, and it can be estimated that an initial abnormality of the bearing has occurred.

Therefore, according to these data, there is a sign of bearing damage from the stage before the amplitude of the vibration reaches the alarm level, and it is possible to estimate the occurrence of damage to the bearing from the stage of the time, and it is possible to estimate the damage earlier. Can make a maintenance plan. In other words, at the time or immediately after that, when the result of the diagnosis including the information that the initial abnormality of the bearing has occurred at the time is transmitted from the server on the manufacturer side to the computer on the user side, the damage of the bearing does not progress. Such an action can be taken early, or a damaged bearing can be replaced sooner, so that a serious accident due to bearing damage can be prevented. To enhance the monitoring of abnormalities in rotating machinery, data measurement,
It is desirable to shorten the interval between diagnoses.

[0045]

According to the method of diagnosing a rotating machine according to the present invention, it is possible to appropriately diagnose the operating state of the rotating machine, and to easily prevent the occurrence of an abnormality in the rotating machine. Therefore, after an abnormality occurs in the rotating machine, a quick response is possible.

According to the rotary machine diagnostic system of the present invention, the above-described rotary machine diagnostic method of the present invention can be performed. Therefore, it is possible to appropriately diagnose the operating state of the rotary machine. Therefore, it is easy to prevent the occurrence of an abnormality in the rotating machine, and it is possible to quickly respond after the occurrence of the abnormality in the rotating machine.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an outline of a diagnostic system for a rotating machine according to an embodiment of the present invention.

FIG. 2 is a diagram showing a change over time of the amplitude of vibration (the relationship between time during operation of the rotary machine and the amplitude of vibration) in the rotary machine according to the embodiment of the present invention.

FIG. 3 is a diagram illustrating a frequency spectrum (relation between frequency and amplitude) of vibration obtained by frequency analysis of vibration of the rotating machine according to the embodiment of the present invention.

FIG. 4 is a diagram illustrating a frequency spectrum (relation between frequency and amplitude) of vibration obtained by frequency analysis of vibration of the rotating machine according to the embodiment of the present invention.

FIG. 5 is a diagram showing a frequency spectrum (relation between frequency and amplitude) of vibration obtained by frequency analysis of vibration of the rotating machine according to the embodiment of the present invention.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Shoji Yoshimura 2-3-1, Shinhama, Arai-machi, Takasago City, Hyogo Prefecture Inside Kobe Steel, Ltd. Takasago Works (72) Inventor Go Kanda 2-chome, Araimachi, Takasago City, Hyogo Prefecture No.3-1 F-term in Kobe Steel, Ltd. Takasago Works (reference) 3H045 AA05 AA25 BA41 CA01 CA08 CA22 CA24 EA13 EA14 EA17 EA26 EA34 EA50 5H223 AA01 BB01 BB04 CC08 DD03 DD07 EE06

Claims (8)

[Claims] 1. A method for measuring and obtaining data on an operating state of a rotary machine, inputting the data to a computer, and processing the data or the data obtained by processing the data to provide diagnostic data on an operating state of the rotary machine. Transmitting to the server via a computer network, diagnosing the operating state of the rotating machine based on the diagnostic data, and transmitting the result of the diagnosis from the server to the computer via the computer network. A method for diagnosing a rotating machine, comprising: And measuring means for measuring and obtaining data relating to the operating state of the rotating machine. Data relating to the operating state of the rotating machine is inputted, and the data or data obtained by processing the data is converted into the data. A computer that outputs diagnostic data relating to the operating state of the rotating machine, and a server machine to which diagnostic data relating to the operating state of the rotating machine is input, and that outputs a result of the diagnosis of the operating state of the rotating machine, A diagnostic system for a rotating machine, comprising a computer network formed by being connected via a computer. 3. The diagnostic system for a rotary machine according to claim 2, wherein said server machine has means for diagnosing an operation state of said rotary machine based on diagnostic data on an operation state of said rotary machine. 4. The data input relating to the operating state of the rotating machine is performed continuously or at set time intervals.
Or a diagnostic system for a rotary machine according to 3. 5. The diagnostic system for a rotary machine according to claim 2, wherein the diagnostic data relating to the operating state of the rotary machine is a frequency spectrum of vibration or gas pressure of the rotary machine. 6. The rotating machine diagnosis system according to claim 2, further comprising a system for changing an operation control condition of the rotating machine based on a result of the diagnosis of the operating state of the rotating machine. 7. The system according to claim 2, wherein when the computer receives a result of the diagnosis of the operating state of the rotating machine from the server machine, a user of the rotating machine is charged based on the result of the diagnosis. The diagnostic system for a rotating machine according to claim 4, 5, 5, or 6. Upon 8. diagnosing the operation state of the rotating machine, to obtain information from a database having information for diagnosis of the operating state of the rotating machine, diagnostic data relating to the information operation state of the rotating machine The method for diagnosing a rotating machine according to claim 1, wherein the operating state of the rotating machine is diagnosed in consideration of the following.