JPH05264392A - Diagnosis system for rotating machine - Google Patents

Abstract

PURPOSE:To predict the stop of a rotating machine before it stops actually. CONSTITUTION:A diagnostic system comprises pickups 1A-1H for detecting vibrations of a rotating machine and outputting analog signals, and A/D convertors 2A-2H for converting the analog signals into digital signals. A vibration frequency analyzer 3 is connected to the A/D convertors 2A-2H and the frequencies and vibration waveforms of the digital signals are analyzer therein. Furthermore, a computer 4 is connected to the vibration frequency analyzer 3, analysis results of the frequencies and vibration waveforms are stored to a memory one by one and, with the stored analysis results compared with the normal values of previously stored frequencies and vibration waveforms, the normality or abnormality of a rotary device is discriminated. And, when it is discriminated that the rotating machine is abnormal, the alarm is given, and the time for the machine to stop is predicted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating equipment facility diagnosis system, and more particularly to a rotating equipment facility diagnosis system for performing failure prediction diagnosis of rotating equipment such as refrigerators, pumps and air conditioners.

[0002]

2. Description of the Related Art In LSI factories, intelligent buildings, hospitals, etc., it is necessary to maintain the environment (temperature, humidity, etc.) in the building in an optimal state. It is generally operated.
Should the operation of the rotating equipment suddenly stop due to a failure, it will be difficult to maintain the environment inside the building optimally, and this will have a great impact. Therefore, there is a demand in the market for urgently developing a technology capable of predicting the stoppage of rotating equipment in advance.

Conventionally, in a central monitoring system for monitoring facility equipment in a building including rotating equipment such as refrigerators, pumps and air conditioners, when the operation of the rotating equipment is actually stopped, it is displayed remotely. The operator confirms that the operation of the rotating device has stopped by looking at the display, and repairs the rotating device for the first time.

[0004]

However, in the above-mentioned prior art, the operator cannot confirm the abnormality of the rotating equipment until the operation of the rotating equipment is actually stopped, and it is necessary to deal with the abnormality. There is a problem of being late. In other words, when a rotating device actually stops due to a failure, the rotating device is damaged considerably,
It often takes time to repair. In addition, if the restoration takes time, the environment inside the building cannot be maintained in an optimal state for a long period of time, and the loss due to this is very large.

An object of the present invention is to provide a rotating equipment facility diagnosis system capable of predicting in advance that an abnormality has occurred in the rotating equipment before the rotating equipment actually stops.

[0006]

In order to achieve the above object, a rotating equipment facility diagnosis system according to the present invention comprises a detecting means for detecting rotational vibration of a rotating equipment, and a detection signal from the detecting means from analog to digital. The conversion means for converting to, the analysis means for capturing the digitally converted signal and analyzing the frequency and the vibration waveform, and storing the analysis results one by one, the normal values of the frequency and the vibration waveform obtained in advance are stored. A storage unit that stores the stored data, a determination unit that determines whether the rotating device is normal or abnormal by comparing the data of the analysis result of the frequency and the vibration waveform stored in the storage unit, and the data of the normal value; and the determination unit. When it determines that the rotating device is abnormal, it outputs an alarm and outputs an operating time until the rotating device stops functioning.

[0007]

According to the above arrangement, the signal of the rotational vibration of the rotating device detected by the detecting means is converted from the analog signal into the digital signal by the converting means and transmitted to the analyzing means. The digital signal transmitted to the analysis means is analyzed here for frequency and vibration waveform, and the analysis result is stored in the storage means one by one. Then, the determination means compares the data of the analysis result of the frequency and the vibration waveform stored in the storage means with the data of the normal values of the frequency and the vibration waveform stored in advance in the storage means, and the comparison result. The normality or abnormality of the rotating device is determined based on the. If the determination unit determines that the rotating device is abnormal, the output unit outputs an alarm, the life time until the function of the rotating device deteriorates and the operation is stopped, and the calculation result is output. It

[0008]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of a rotating equipment facility diagnosis system of the present invention. Although not shown, rotary devices such as a refrigerator, a pump, and an air conditioner are installed at a plurality of locations on the rooftop, second floor (2F) and basement first floor (B1F) of the building. Pickups 1A to 1H are used for these rotating devices.
, And the pickups 1A to 1H are respectively connected to the vibration / frequency analysis device 3 via A / D converters (analog / digital converters) 2A to 2H. The pickups 1A to 1H are attached to portions that are particularly sensitive to the rotational vibration of the rotating device, and extract the rotational vibration as acceleration data. The vibration / frequency analysis device 3 is connected to a computer (personal computer) 4.

In this embodiment, the pickups 1A to 1H constitute detection means, the A / D converters 2A to 2H constitute conversion means, and the vibration / frequency analysis device 3 constitutes analysis means. The storage means, the determination means, and the output means are provided inside the computer 4.

When detecting the rotational vibration of a rotating machine, vertical vibration is detected when an air-cooled screw chiller refrigerator is installed as a refrigerator, and horizontal vibration is detected when a cold water secondary pump is installed as a pump. As an air conditioner
When the DP room lower outlet air conditioner is installed, it is preferable to detect each horizontal vibration.

Next, the procedure for diagnosing rotating equipment by the rotating equipment facility diagnosis system having the above-mentioned configuration will be described with reference to FIG.

First, the rotational vibrations of a rotating device such as a refrigerator, a pump and an air conditioner are detected by the pickups 1A to 1H, and the detection signals are transmitted to the A / D converters 2A to 2H (step 21). In the A / D converters 2A to 2H,
The analog signals transmitted from the pickups 1A to 1H are converted into digital signals, and the converted digital signals are transmitted to the vibration / frequency analysis device 3 (step 2).
2). The vibration / frequency analysis device 3 performs frequency analysis and vibration waveform analysis on the transmitted digital signal, and transmits the result to the computer 4 (step 23). In the computer 4, the vibration / frequency analysis device 3
The analysis results of the frequency and the vibration waveform from (1) are stored in the storage device one by one (step 24), and the stored analysis result data is compared with the previously stored frequency and vibration waveform normal value data ( Step 25) determines whether the rotating device is normal or abnormal (step 26). In this case, not only comparison of whether the analysis result data is within the range of normal values, but also comparison of whether the fluctuation tendency of the analysis result data stored in the storage device is normal, Determine whether the rotating equipment is normal or abnormal. When it is determined that an abnormality has occurred in the rotating equipment, an alarm is output and the life time until the function of the rotating equipment deteriorates and stops is calculated, and the calculation result is displayed on, for example, a CRT. (Step 27). When it is determined that the rotating device is in the normal state, the fact is displayed on the CRT (step 28).

By looking at the result displayed on the CRT, the operator can know in advance exactly the time until the function of the rotating device is deteriorated and stop, and it is possible to take prompt action.

Although the above-described embodiment is applied to a rotating device installed in a building, the present invention is not limited to this, and the rotating device facility diagnosis system of the present invention can be applied to rotating devices installed in a plant, for example. Can be applied.

[0016]

As described above, according to the present invention,
Since it is possible to know in advance that the rotating equipment will stop functioning and will stop, and it will be possible to give advance notice of the rotating equipment stoppage accordingly, so quick action will be taken even when the rotating equipment actually stops. It is possible.

Further, since the advance warning of stopping the rotating equipment is issued based on the data accumulated in the storage means, the accuracy of the advance warning can be improved.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a rotating equipment facility diagnosis system of the present invention.

FIG. 2 is a flowchart showing a diagnostic procedure for a rotating device.

[Explanation of symbols]

 1A-1H pickup 2A-2H A / D converter 3 Vibration / frequency analysis device 4 Computer

Claims (1)

[Claims] 1. A detection means for detecting the rotational vibration of a rotating device, a conversion means for converting a detection signal from the detection means into an analog signal and a digital signal, and a frequency- and vibration waveform analysis by capturing the digitally converted signal. And an analysis unit that stores the analysis results one by one, and a storage unit that stores the normal values of the frequency and the vibration waveform obtained in advance, and the analysis result data of the frequency and the vibration waveform that are stored in the storage unit. A determination unit that determines normality / abnormality of the rotating device by comparing with normal value data, and when the determining unit determines that the rotating device is abnormal, outputs an alarm and functions of the rotating device. A rotating equipment facility diagnosis system, comprising: an output unit that calculates and outputs a life time until a stop.