JPH03233340A - Monitoring device for rotating motor - Google Patents

Abstract

PURPOSE:To process the data of all monitoring items with the same monitoring device by comprising the device of a data processor, a keyboard, a data display part, and a printer. CONSTITUTION:A shaft vibration sensor 8, a bearing temperature sensor 9, a coil temperature sensor 10, and a current transformer 11, etc., are provided at a motor 1 side. The data of the monitoring item measured with every kind of sensor is on-line inputted to the data processor 4 when the motor 1 is operated. Also, the data of insulation resistance, etc., extracted in a state where the motor 1 is stopped is off-line inputted to the processor 4 via the keyboard 5. Also, the processor 4 stores and edits the data of the monitoring item inputted at need, and in addition to that, it stores the history data of every kind of item extracted at the test of a factory, etc. Every kind of stored data is read out at need, and a trend of the lapse of time is classified by every monitoring item, and is outputted to a CRT 6, and the printer 7. Simultaneously, a comparison result with the history data is also outputted. When abnormality occurs while an operation is performed, an alarm is immediately issued, and an abnormal item is informed.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a rotation monitoring device for providing diagnostic indicators necessary for predicting maintenance of electric motors installed in various plant equipment. Regarding.

[Conventional technology] This system is equipped with an on-site monitoring panel that processes data as a monitoring system for the operating status of rotating electric machines, and monitors coil temperature, bearing temperature, and shaft vibration while the rotating electric machine is in operation.

Measured data for each item, such as starting current and starting frequency, is entered into the monitoring panel online, and this data is edited by a data processing device and then displayed on a CRT, etc., or output to a printer to create a report. Conventionally, devices that provide indicators necessary for abnormality diagnosis have been put into practical use.

On the other hand, regarding the wA edge diagnosis of rotating electric machines, in addition to monitoring the operating status using the monitoring panel mentioned above, insulation tests are carried out by stopping the rotating electric machines during periodic inspections, etc. Insulation resistance 1 dielectric loss tangent, AC test 9 partial discharge test data is collected, and the progress of insulation deterioration is assessed and diagnosed based on trends in this data.

[Problem to be solved by the invention]

By the way, as mentioned above, in the conventional method, the data of items to be monitored online and the data of insulation diagnosis that cannot be monitored online are managed separately, so the maintenance predictive diagnosis of rotating IA machines is performed using both together. In some cases, it is necessary to compare separately created data sheets and to make a judgment by comparing them with the basic H calendar data for each item obtained from factory tests, installation tests, etc., and the diagnosis work is extremely complicated. there were.

The present invention has been made in consideration of the above points, and an object of the present invention is to provide a monitoring device for a rotating electrical machine that allows the same monitoring device to process data of all monitoring items.

Means for Solving 5 Problems] In order to solve the above problems, the monitoring device of the present invention has a hardware configuration consisting of a data processing device, a keyboard, a data display section, and a printer, and the data processing device includes:
Temperature and vibration collected from each part of the rotating electrical machine during operation and input online.

Measurement data that the startup is smooth, temporary key input offline wA&! Test data and historical data of each item collected during factory tests, on-site installation tests, periodic inspection tests, etc. are memorized and edited, and the trends of each data can be viewed as needed.
It also has a monitoring function that reads out the results of comparison with historical data and outputs it to a display section or printer, and issues an alarm when an abnormality sign occurs.

[Function] The above-mentioned monitoring device allows you to read out the data of each monitoring item input into the data processing device online and offline at any time, check the operating status of the rotating electrical machine, and compare it with historical data. Maintenance predictive diagnosis can be easily performed. Further, if an abnormality sign occurs during operation, a warning is issued, so based on this warning, appropriate maintenance measures can be taken immediately to ensure safe operation.

〔Example〕

FIG. i shows a system diagram of a monitoring device according to an embodiment of the present invention.

In the figure, 1 is an electric motor to be monitored, 2 is a driven machine, and 3 is a monitoring device according to the present invention. Here, the node configuration of the monitoring device 3 is a data processing device 4. Keyboard 5. CRT6 for data display. It consists of a printer 7 for creating forms. On the other hand, the electric motor 1gs has a shaft vibration sensor 8. Bearing temperature sensor9. Coil temperature sensor 10
．． and a current transformer 11.

Then, data on monitoring items such as shaft or bearing stand vibration, bearing metal temperature, coil temperature, starting current, etc. measured by the various sensors during operation of the electric motor 1 is input online to the data processing device 4. In addition, data obtained from insulation resistance 5 dielectric loss tangent, corona radiation ia test, alternating current test, etc. collected in temporary insulation tests when the electric Ill is stopped during periodic inspections, etc., is processed offline via the keyboard 5. It is input to device 3.

On the other hand, the data processing device 4 has the following software functions. That is, the data processing device 4 is online;
Memorizes data for each monitoring item entered offline at any time 2
In addition to editing and accumulating, it also stores historical data on various items collected during factory tests, on-site installation tests, periodic inspection tests, etc. of electric Ills. Then, by giving a read command when necessary, the above-mentioned data stored in the data processing word M4 are sequentially read out, and the trends over time are divided into each monitoring item and displayed on the CRT6. Output to a printer and display its contents or create a form. At the same time, the results of comparison with historical data are also output. Further, when an abnormal sign appears during operation of the electric motor 1, an alarm is immediately issued to notify the abnormal item. In addition, these data are transmitted from the monitoring device 3 to the upper diagnostic expert system 1 through the communication line.
2, and it is also possible to diagnose abnormalities using advanced knowledge similar to the judgments made by experts here.

〔Effect of the invention〕

As described above, by employing the monitoring device of the present invention, various monitoring data collected from one meter of rotation can be input and collected online or offline, and driving status data *v2. In addition to being able to provide management indicators necessary for maintenance predictive diagnosis, it also issues an alarm when signs of abnormality occur, thereby streamlining the maintenance and abnormality diagnosis of the rotating tIl.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a monitoring device according to an embodiment of the present invention. In the figure,

Claims (1)

[Claims] 1) A monitoring device that provides diagnostic indicators necessary for predicting the maintenance of rotating electric machines.The hardware configuration consists of a data processing device, a keyboard, a data display unit, and a printer. Measurement data such as temperature, vibration, starting current, etc. collected from each part and entered online, insulation test data temporarily keyed in offline, and each item collected during factory tests, on-site installation tests, periodic inspection tests, etc. Memorize historical data,
A rotating electrical machine characterized by having a monitoring function that edits, reads trends of each data and comparison results with historical data and outputs them to a display unit or printer when necessary, and also issues an alarm when abnormal signs occur. monitoring equipment.