RU129641U1 - AUTOMATED SYSTEM FOR MONITORING AND DIAGNOSTICS OF ELECTRIC PUMPS OF THE FRESH WATER SYSTEM - Google Patents

Abstract

An automated system for monitoring and diagnosing electric pumps of a fresh water system, characterized in that it is equipped with vibration sensors and analog-to-digital converters that transmit information about the operation of electric pumps through an input / output device to random access memory, after which the microprocessor compares the data of permanent and random memory devices, sends a signal about normal or emergency operation of the electric pump to the control unit, which, in the event of an accident, stops using the starter malfunctioning pump.

Description

The utility model relates to test equipment and can be used to monitor and diagnose electric pumps of a fresh water system on a ship.

A well-known automated system for monitoring, protecting and diagnosing a fleet of electric motors for pumps is disclosed in the document “Automated system for protecting and diagnosing a fleet of electric motors for an industrial enterprise” V. P. Kargopoltsev, I. Ya. Simakhin // New in Russian Electric Power Industry (NER, No. 4), published in April 2005, pp. 41-45.

The specified pump control system contains monitoring and diagnostics objects - pumps, current sensors, which provide for tracking emergencies and disconnecting the load, a controller operating under the control of the corresponding software, a relay connecting and disconnecting motors, as well as a display, control keys and RS-485 interface for data exchange with a personal PC. The system is equipped with devices for storing appropriate software and data.

The technical result of the claimed utility model is to expand the range of controlled parameters in relation to the prototype device using a vibration sensor and a separate analog-to-digital converter. The utility model makes it possible to determine the control actual parameters of the technical state of the electric pump by the level of vibration and deviations from the nominal values, diagnose the operability of the stationary electric pump, automatically evaluate the possibility of further operation, while reducing labor costs by automating the process of measuring primary values and analyzing the obtained data.

Figure 1 presents the functional diagram of the inventive utility model.

On the bodies of the electric pumps of the main 1 and backup 2, vibration sensors 3 and 4 are installed, connected to analog-to-digital converters 5 and 6, which are connected to the input of the input-output device 7, the outputs of which are connected via the communication bus of units 8 to the input of random access memory 10, the output of which, like the output of the permanent storage device 9, is connected to the input of the microprocessor 11, the output of which through the communication bus of the blocks 8 is connected to the input-output device 7. The output of the input-output device 7 is also connected to the input of the unit board 12, whose outputs are connected to the input of control station 13 having signal lamps unit 14 and starters 15 inputs and 16 outputs are connected to electric pumps 1 and 2.

The device operates as follows.

When you turn on the main pump 1 and its normal operation, the vibration sensor 3, the oscillations of which are sequential in nature, produces a stable analog signal, which is converted into a digital format through an analog-to-digital converter 5 and transmitted to the operational via the input-output device 7 and the communication bus of units 8 a memory device 10 for storing working data until it is processed by the microprocessor 11, which compares the received data with the characteristics and values stored in the read-only memory 9 and through the communication bus of the units 8, the input / output device 7 sends a signal to the control unit 12 about the normal operation of the pump 1, from which a signal is sent to the control station 13 and the message “pump 1 normal operation” lights up on the signal lamp block 14.

When a malfunction occurs in a working pump 1, the vibration of the housing of which increases, the vibration intensity of the vibration sensor 3 is amplified, which causes an increase in the generated output voltage of the sensor. The increased signal through an analog-to-digital converter 5, an input-output device 7 and a communication bus of blocks 8 is transmitted to the random access memory 10 and compared by the microprocessor 11 with the data of the permanent memory device 9. In the case when the vibration intensity of the vibration sensor 3 exceeds the threshold value, the microprocessor 11 through the input-output device 7, a command is issued to the control unit 12 to stop the main electric pump 1 through the starter 15 and start the backup electric pump 2 through the starter 16. At the same time continuously from the control unit 12 a signal to the control post 13 and block 14, signal lamps and lights scoreboard "pump 1 accident".

Monitoring the operation of the backup electric pump 2 occurs in a similar way using a vibration sensor 4 and analog-to-digital Converter 6.

After eliminating the malfunction of the main electric pump 1, it is brought into operation by the operator of the control station 13 using the starter 15. At the same time, the operator of the control station 13 stops the backup electric pump 2 using the starter 16.

Claims (1)

An automated system for monitoring and diagnosing electric pumps of a fresh water system, characterized in that it is equipped with vibration sensors and analog-to-digital converters that transmit information about the operation of electric pumps through an input / output device to random access memory, after which the microprocessor compares the data of permanent and random memory devices, sends a signal about normal or emergency operation of the electric pump to the control unit, which, in the event of an accident, stops using the starter malfunctioning pump.

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