WO2021002067A1 - Dispositif de pompe, procédé pour commander un dispositif de pompe, et système de pompe - Google Patents

Dispositif de pompe, procédé pour commander un dispositif de pompe, et système de pompe Download PDF

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Publication number
WO2021002067A1
WO2021002067A1 PCT/JP2020/012907 JP2020012907W WO2021002067A1 WO 2021002067 A1 WO2021002067 A1 WO 2021002067A1 JP 2020012907 W JP2020012907 W JP 2020012907W WO 2021002067 A1 WO2021002067 A1 WO 2021002067A1
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Prior art keywords
sensor
motor
pump device
threshold value
measurement data
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PCT/JP2020/012907
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English (en)
Japanese (ja)
Inventor
麻美子 野田
和也 平本
修 楯石
孝志 関口
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株式会社荏原製作所
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Publication of WO2021002067A1 publication Critical patent/WO2021002067A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions

Definitions

  • the present invention relates to a pump device, a control method thereof, and a pump system.
  • Submersible pumps are generally used for septic tank drainage, miscellaneous drainage / equipment drainage, rainwater / spring drainage, etc. Therefore, the submersible pump is required to respond particularly quickly to an emergency such as a failure or a power failure so that the submersible pump is always driven.
  • Patent Document 1 describes a control system that shuts off the power supply from the power supply to the pump when an abnormal signal indicating an abnormal operating state is detected, as a technique particularly preferably used for a submersible pump.
  • Patent Document 2 describes a device in which a water immersion detection sensor is provided in a submersible pump and the electric motor is stopped at the time of water immersion in the oil chamber.
  • the pump is kept stopped for a long time.
  • An object of an embodiment of the present invention is to provide a pump device capable of shortening the stop time of a submersible pump when an abnormal operating state occurs as compared with the conventional case.
  • An object of the present invention is to provide a control method of a pump device capable of shortening the stop time of a submersible pump when an abnormal operating state occurs as compared with the conventional case.
  • An object of the present invention is to provide a pump system including a pump device capable of shortening the stop time of a submersible pump when an abnormal operating state occurs as compared with the conventional case.
  • the pump device includes an impeller and a motor configured to drive a rotating shaft that rotates the impeller, so as to measure a state in the pump device.
  • a motor is connected to an inverter controlled by a control device, including a sensor unit including at least one sensor configured and a communication board configured to receive measurement data of at least one sensor from the sensor unit.
  • the control device determines the presence or absence of an abnormal state in the pump device based on the measurement data of at least one sensor, and based on the determination result, the motor is set to the normal operation mode and the motor is set to the normal operation mode.
  • the pumping device is configured to switch between low power operating modes, which also operate at low power, and the communication board is configured to transmit the measurement data of at least one sensor received to the control device. Can be provided.
  • an impeller configured to drive a rotating shaft for rotating the impeller, and at least one configured to measure a state in the pump device. It is a control method of a sensor unit including a sensor and a pump device including the sensor. Based on the measurement data of at least one sensor acquired from the sensor unit, the presence or absence of an abnormal state in the pump device is determined, and the determination result is obtained. Based on this, it is possible to provide a control method including a step of switching the motor between a normal operation mode and a low output operation mode in which the motor is operated at a lower output than the normal operation mode.
  • FIG. 1 It is schematic cross-sectional view which shows the submersible pump as an example of the pump device by one Embodiment of this invention. It is a schematic block diagram which shows the structural example of the pump system including the submersible pump of FIG. It is a schematic block diagram which shows the structural example of the control part shown in FIG. It is a flow chart which shows an example of processing by a control part. It is a schematic block diagram which shows the structural example of the pump system by another embodiment of this invention.
  • FIG. 1 shows an example of a pump device according to an embodiment of the present invention.
  • the pumping device is a submersible pump 100.
  • the submersible pump 100 includes an impeller 102 that rotates about the axis AL, and a pump casing 104 and a pump bracket 106 that define a pump chamber 103 that houses the impeller 102.
  • the impeller 102 is connected to the rotating shaft 108 and rotates with the rotation of the rotating shaft 108.
  • the pump casing 104 has a suction port 104a and a discharge port 104b, and together with the pump bracket 106, defines a water flow path. By rotating the impeller 102, water is transferred from the suction port 104a to the discharge port 104b.
  • the pump bracket 106 is fixed to the pump casing 104 with screws or the like and covers the back surface (upper side in FIG. 1) of the impeller 102.
  • a through hole (reference numeral omitted) for inserting the rotating shaft 108 is formed in the bottom portion of the pump bracket 106 that covers the back surface of the impeller 102. Further, the through hole is provided with a mechanical seal 110 for sealing the rotating shaft 108.
  • the motor 112 provides the impeller 102 with rotational driving force.
  • the motor 112 includes a rotating shaft 108 that rotates about the axis AL, a rotor 114 that rotates integrally with the rotating shaft 108, and a stator 116 provided on the outer peripheral side of the rotor 114.
  • the stator 116 has a stator core 116a and a stator coil 116b wound around the stator core 116a.
  • a power line is connected to the stator coil 116b, and power is supplied from an external power source (for example, a commercial power source) through the cable 118. Specifically, electric power is supplied to the stator coil 116 of the motor 112 via an external control device (not shown in FIG. 1) connected to an external power source.
  • the control device includes an inverter connected to the motor 112 and a control unit that communicates with the inverter.
  • the control unit determines the presence or absence of an abnormal state in the submersible pump 100 by a process described later, and based on the determination result, sets the motor 112 between the normal operation mode and the low output operation (in other words, modest operation) mode. It can be switched with. In the low power operation mode, the motor 112 is operated at a lower power than in normal operation.
  • a tubular motor frame 120 is provided so as to cover the outer circumferences of the rotor 114 and the stator 116.
  • the stator core 116a is fixed to the inner peripheral surface of the motor frame 120.
  • the pump casing 104 side (lower side in FIG. 1) of the motor 112 is referred to as a “load side”, and the opposite side (upper side in FIG. 1) is referred to as a “counterload side”.
  • the load-side bearing housing 122 is fixed to the inner peripheral surface of the load-side end of the motor frame 120.
  • the load-side bearing housing 122 accommodates the load-side bearing 124 for axially supporting the rotating shaft 108.
  • the load side bearing housing 122 is provided with a mechanical seal 110 for sealing the rotating shaft 108.
  • the internal space of the load-side bearing housing 122 and the pump bracket 106 forms a lubricating oil chamber 126 filled with lubricating oil for the mechanical seal 110.
  • the mechanical seal 110 can prevent the water transferred by the impeller 104 from entering the motor chamber 128.
  • the counterload side bearing housing 130 is fixed to the inner peripheral surface of the counterload side end of the motor frame 120.
  • the counterload side bearing housing 130 accommodates the counterload side bearing 132 for pivotally supporting the rotating shaft 108.
  • the upper cover 134 is fixed to the opposite end of the motor frame 120 and seals the upper opening of the tubular motor frame 120.
  • the cable 118 is arranged in the motor chamber 128 through the opening (reference numeral omitted) of the upper cover 134.
  • the internal space of the submersible pump 100 defined by the upper cover 134, the motor frame 120, and the load side bearing housing 122 is referred to as a motor chamber 128.
  • the motor 112 of the submersible pump 100 can be operated in the normal operation mode or the modest operation mode (in other words, the low output operation mode) by the external control device, depending on the state in the submersible pump 100.
  • the submersible pump 100 includes various sensors that detect the state inside the submersible pump 100, and a sensor substrate that is electrically connected to these sensors.
  • the sensor and the sensor substrate are collectively referred to as a sensor unit.
  • the sensor unit is a component that outputs measurement data of the sensor to the communication board 12 described later.
  • the sensor unit may include at least one sensor. Further, the sensor unit does not have to include the sensor substrate.
  • the sensor board processes the measured value signal from the sensor and transmits the processed data to the communication board 12.
  • the communication board 12 outputs the received data to the control device.
  • the two sensor substrates 10a and 10b are arranged in the motor chamber 128 on the counterload side bearing housing 130 and the load side bearing housing 122, respectively.
  • the number and installation positions of the sensor substrates are not limited to the illustrated examples.
  • the sensor substrates 10a and 10b can be omitted. In that case, the measured value signals of the various sensors are directly output to the communication board 12 and processed by the communication board 12.
  • the counterload side temperature sensor 14a, the load side temperature sensor 14b, the counterload side vibration sensor 15a, the load side vibration sensor 15b, and the oil deterioration detector 16 are arranged as sensors for detecting the state inside the submersible pump 100.
  • the counterload side temperature sensor 14a and the load side temperature sensor 14b may be, for example, a thermocouple, and are arranged in the motor chamber 128 in order to monitor the temperature rise of the motor 112.
  • the counterload side temperature sensor 14a and the load side temperature sensor 14b are arranged at the counterload side coil end and the load side coil end of the stator 116 of the motor 112, respectively.
  • the coil end refers to a portion of the stator coil 116b that protrudes from the end surface of the stator core 116a on one side in the axial direction.
  • the counterload side temperature sensor 14a and the load side temperature sensor 14b may be attached to the counterload side bearing 132 and the load side bearing 124, respectively, so as to monitor the temperature of the bearing of the rotating shaft 108, for example. .. Further, one of the non-load side temperature sensor 14a and the load side temperature sensor 14b may be omitted.
  • a counterload side vibration sensor 15a such as an acceleration sensor and a speed sensor and a load side vibration sensor 15b are arranged in the motor chamber 128.
  • the anti-load side vibration sensor 15a and the load side vibration sensor 15b measure the anti-load side bearing 132 and the load side bearing 124 of the rotating shaft 108 in order to monitor the vibration of the rotating shaft 108.
  • the anti-load side vibration sensor 15a is mounted on the anti-load side sensor substrate 10a fixed to the anti-load side bearing housing 130
  • the load side vibration sensor 15b is the load fixed to the load side bearing housing 122. It is mounted on the side sensor board 10b.
  • the installation positions of the anti-load side vibration sensor 15a and the load side vibration sensor 15b are not particularly limited as long as the vibration of the rotating shaft 108 can be monitored. Further, one of the anti-load side vibration sensor 15a and the load side vibration sensor 15b may be omitted.
  • the oil deterioration detector (in other words, the oil sensor) 16 is arranged in the lubricating oil chamber 126.
  • the illustrated oil deterioration detector 16 can have, for example, the configuration described in JP-A-2002-310091.
  • the oil deterioration detector 16 is attached to the load-side bearing housing 122 via an electrically insulating attachment portion (not shown) so that the electrode portion 16a projects into the lubricating oil chamber 126.
  • the oil deterioration detector 16 electrically conducts the electrode portion 16a so that a signal is output to the load-side sensor substrate 10b. It is configured in.
  • the configuration of the oil deterioration detector 16 is not particularly limited.
  • the oil deterioration detector 16 may be configured to detect the degree of contamination of the lubricating oil by, for example, a throwing / receiving receiver.
  • the temperature sensor, the vibration sensor and the oil deterioration detector are provided as the sensors for detecting the state in the submersible pump 100, and at least one of these is provided. Just do it. Further, in addition to the temperature sensor, the vibration sensor and the oil deterioration detector, a sensor for detecting an abnormal state in the submersible pump 100 can be appropriately included in the sensor unit.
  • the submersible pump 100 is a sensor that detects the state inside the submersible pump 100 (in this embodiment, the anti-load side and load side temperature sensors 14a and 14b, the anti-load side and load side vibration sensors 15a and 15b, and the oil deterioration detector 16).
  • the communication board 12 supplies power to the non-load side and load side sensor boards 10a and 10b, and receives signals (in other words, measurement data of the above sensor) from the non-load side and load side sensor boards 10a and 10b. It is configured as follows.
  • the communication board 12 is a PLC (Power Line Communications) board, and is configured to be able to communicate with an external control device via a power line coupled to a cable 118 for driving a motor.
  • the communication board 12 does not necessarily have to be a PLC board.
  • FIG. 2 is a schematic block diagram showing a configuration of a pump system 20 according to an embodiment of the present invention.
  • the pump system 20 includes, as an example, the submersible pump 100 of the first embodiment.
  • the pump system 20 includes a submersible pump 100 and a control device 22 that controls the operation of the submersible pump 100.
  • the control device 22 includes an inverter 26 connected to the commercial power supply 24 and connected to the motor 112 of the submersible pump 100, and a control unit 28 electrically connected to the inverter 26.
  • the inverter 26 converts the three-phase AC voltage supplied from the commercial power supply 24 into a three-phase AC voltage having a desired frequency and a desired magnitude, and supplies the converted three-phase AC voltage to the motor 112.
  • the control unit 28 controls the motor 112 by controlling the inverter 26.
  • the control unit 28 can be supplied with electric power from the commercial power supply 24 via the inverter 26 or directly from the commercial power supply 24.
  • the sensors indicating the state inside the submersible pump 100 are the sensors described above. It is electrically connected to the communication board 12 via the boards 10a and 10b so as to be communicable. In FIG. 2, the sensor and the sensor substrate are collectively referred to as a sensor unit.
  • the communication board 12 is electrically connected to the control unit 28 of the control device 22 so as to be able to communicate with each other.
  • the control unit 28 is a counterload side and load side temperature sensors 14a and 14b, antiload side and load side vibration sensors 15a and 15b, and an oil deterioration detector 16 acquired from the sensor substrates 10a and 10b.
  • the inverter 26 is controlled based on the measurement data. Specifically, the control unit 28 determines measurement data of at least one of the counterload side and load side temperature sensors 14a and 14b, the counterload side and load side vibration sensors 15a and 15b, and the oil deterioration detector 16.
  • the inverter 26 is controlled so that the output of the motor 112 gradually or gradually decreases when the threshold value (hereinafter referred to as the first threshold value) is reached (in other words, low output operation or modest operation is performed). be able to.
  • the threshold value hereinafter referred to as the first threshold value
  • the measurement data of at least one of the anti-load side and load side temperature sensors 14a and 14b, the anti-load side and load side vibration sensors 15a and 15b, and the oil deterioration detector 16 is the first.
  • the motor 112 can be stopped when a second threshold value larger than the threshold value is reached.
  • the first threshold value and the second threshold value of the measurement data are preset for each of the anti-load side and load side temperature sensors 14a and 14b, the anti-load side and load side vibration sensors 15a and 15b, and the oil deterioration detector 16. , Stored in the control unit 28.
  • the pump system 20 can be provided with a notification device 30 capable of communicating with the control unit 28 of the control device 22.
  • the notification device 30 can be installed outside the submersible pump 100 (for example, on the ground), and the communication between the control unit 28 and the notification device 30 may be wired communication or wireless communication. ..
  • the measurement data of at least one of the anti-load side and load side temperature sensors 14a and 14b, the anti-load side and load side vibration sensors 15a and 15b, and the oil deterioration detector 16 reaches the first threshold value. At that time, an alarm signal indicating that the submersible pump 100 is in an abnormal state can be output to the notification unit 32 of the notification device 30.
  • the notification device 30 can acquire various states (for example, start / stop of the motor 112, current value, failure state, various operation histories, etc.) in the pump system 20 and various set values required for other operations from the control unit 28. It may have a display unit 34 for displaying data.
  • the display unit 34 can be configured to be communicable with the control unit 28 via or directly from the notification unit 32.
  • the reporting unit 32 When the reporting unit 32 receives the alarm signal, it can notify the administrator / maintenance / inspector of the pump system 20 that the alarm signal has been received.
  • the reporting unit 32 can be composed of visual display and / or voice reporting means, for example, a telephone, a PC (personal computer), a facsimile, and / or a personal mobile phone installed in the management facility.
  • the reporting means can be determined in advance and stored in the control unit 28.
  • the reporting unit 32 and / or the display unit 34 can be configured so that the administrator / maintenance / inspector of the pump system 20 can identify a sensor indicating abnormal measurement data.
  • control unit 28 includes a setting unit 40, a storage unit 42, a calculation unit 44, a communication unit 46, and an IO unit (in other words, an input / output unit) 48.
  • Each part of the control unit 28 may be connected to each other via a bus, or each part may be connected by communication, or both a bus connection and a communication connection may be mixed.
  • various data for the operation of the submersible pump 100 such as the rated current value of the pump, are set.
  • the data can include first and second thresholds of the measurement data described above.
  • the setting unit 40 stores the set data in the storage unit 42.
  • the first and second threshold values may be stored in the storage medium 50 built in the communication unit 46.
  • the storage unit 42 stores the data set by the setting unit 40 and the control program of the submersible pump 100.
  • the calculation unit 44 executes the processing of the control unit 28 by reading the control program from the storage unit 42 and executing it.
  • the calculation unit 44 can include a determination unit that compares the measurement data of each sensor 14a, 14b, 15a, 15b, 16 with the first and second threshold values stored in the storage unit 42 or the storage medium 50. ..
  • the communication unit 46 includes an integrated circuit 52 and a storage medium 50.
  • the integrated circuit 52 and the storage medium 50 are driven by electric power supplied from the commercial power supply 24 or the inverter 26 to the control unit 28.
  • the IO unit 48 performs input / output between the arithmetic unit 44, the inverter 26, and the communication board 12.
  • the calculation unit 44 makes the motor 112 modest.
  • the inverter 26 is controlled so as to start or stop.
  • the measurement data may always be input from the communication board 12 to the control unit 28 as continuous values.
  • the calculation unit 44 stores data indicating modest operation or stop of the motor 112 when the measurement data of the sensors 14a, 14b, 15a, 15b, 16 reaches the first threshold value or the second threshold value. To memorize.
  • the integrated circuit 52 reads the data from the storage medium 50 and transmits an alarm signal to the reporting unit 32 of the reporting device 30.
  • the calculation unit 44 of the control unit 28 sets the first and second threshold values for the vibration sensors 15a and 15b, the temperature sensors 14a and 14b, and the oil deterioration detector 16 in a predetermined order. Make a comparison. Specifically, the calculation unit 44 determines whether or not the measurement data of each of the vibration sensors 15a and 15b is smaller than the first threshold value (referred to as vibration threshold value 1) (step 1). In step 1, when the measurement data of the vibration sensors 15a and 15b is smaller than the first threshold value (YES), the calculation unit 44 determines that the measurement data of the temperature sensors 14a and 14b is the first threshold value (temperature threshold value).
  • step 2 It is determined whether or not it is smaller than (referred to as 1) (step 2).
  • step 2 when the measurement data of the temperature sensors 14a and 14b are smaller than the first threshold value (YES), the calculation unit 44 determines that the measurement data of the oil deterioration detector 16 is the first threshold value (referred to as oil threshold value 1). ) Is smaller (step 3).
  • step 3 when the measurement data of the oil deterioration detector 16 is smaller than the first threshold value (YES), all the measurement data of vibration, temperature, and lubricating oil are smaller than the first threshold value.
  • the motor 112 is operated normally (step 4).
  • step 1 when at least one of the measurement data of the vibration sensors 15a and 15b has reached the first threshold value (NO), the calculation unit 44 has the measurement data of the second vibration sensors 15a and 15b. It is determined whether or not it is smaller than the threshold value (referred to as vibration threshold value 2) of (step 5).
  • step 5 when the measurement data of the vibration sensors 15a and 15b is smaller than the second threshold value (YES), the calculation unit 44 determines that the measurement data of the temperature sensors 14a and 14b is the second threshold value (temperature threshold value). It is determined whether or not it is smaller than (referred to as 2) (step 6).
  • step 5 when the measurement data of at least one of the vibration sensors 15a and 15b has reached the second threshold value (NO), the calculation unit 44 stops the output of the inverter 26 and stops the motor 112 (step 9). ).
  • step 6 when the measurement data of the temperature sensors 14a and 14b are smaller than the second threshold value (YES), the calculation unit 44 determines that the measurement data of the oil deterioration detector 16 is the second threshold value (oil threshold value 2). It is determined whether or not it is smaller than (referred to as) (step 7). In step 6, when the measurement data of at least one of the temperature sensors 14a and 14b has reached the second threshold value (NO), the calculation unit 44 stops the output of the inverter 26 and stops the motor 112 (step 9). ).
  • step 7 when the measurement data of the oil deterioration detector 16 is smaller than the second threshold value (YES), all the measurement data of vibration, temperature, and lubricating oil are smaller than the second threshold value, so that the calculation unit 44 uses the motor.
  • Control the inverter 26 to start modest operation of 112 step 8). That is, the operation of the submersible pump 100 is continued while the output of the motor 112 is gradually or gradually reduced.
  • the calculation unit 44 may output an alarm signal to the notification unit 32 of the notification device 30 via the communication unit 46.
  • step 7 when the measurement data of the oil deterioration detector 16 has reached the second threshold value (NO), the calculation unit 44 stops the output of the inverter 26 and stops the motor 112 (step 9).
  • the vibration sensors 15a and 15b, the temperature sensors 14a and 14b, and the oil deterioration detector 16 has reached the first threshold value
  • the motor 112 is stopped.
  • the determination process for the measurement data is performed in the order of the vibration sensors 15a and 15b, the temperature sensors 14a and 14b, and the oil deterioration detector 16.
  • the order of determination processing can be appropriately changed depending on the usage conditions of the motor 112.
  • the determination process may be performed in the order of the temperature sensors 14a and 14b, the oil deterioration detector 16, and the vibration sensors 15a and 15b.
  • any sensor may be determined first.
  • any sensor may be determined first.
  • the submersible pump 100 While the submersible pump 100 is operated, the above determination process is repeated. Therefore, when all the measurement data of vibration, temperature, and lubricating oil become smaller than the first threshold value after the start of the modest operation, the submersible pump 100 can be automatically switched from the modest operation to the normal operation. Further, when at least one of the measurement data of vibration, temperature and lubricating oil reaches the second threshold value, the operation of the submersible pump 100 can be automatically stopped.
  • the pump device may be stopped at the time when the parts replacement work or the like is started at the site.
  • the stop time of the pump device can be shortened as compared with the conventional case.
  • FIG. 5 shows a pump system 20A according to another embodiment of the present invention.
  • the inverter 26 is built in the submersible pump 100.
  • the communication board 12 can directly communicate with the inverter 26.
  • the control unit 28 can execute the above determination process and output a control signal for controlling the inverter 26 to the inverter 26 via the communication board 12.
  • the pump systems 20 and 20A may be provided with a battery device for supplying electric power to the motor 112 in the event of a power failure, and may be configured so that the motor 112 can be operated at a low output by the electric power from the battery device.
  • the above determination process can be used.
  • a threshold value different from the first and second threshold values can be set for any of the sensors, and the motor 112 can be operated at a low output so that the measurement data of the sensor does not reach this threshold value.
  • the present invention includes the following aspects.
  • a pump device including an impeller and a motor configured to drive a rotating shaft that rotates the impeller.
  • a sensor unit including at least one sensor configured to measure a state in the pumping apparatus and a communication board configured to receive measurement data of at least one sensor from the sensor unit.
  • the motor is connected to an inverter controlled by a controller
  • the control device determines the presence or absence of an abnormal state in the pump device based on the measurement data of at least one sensor, and based on the determination result, sets the motor in the normal operation mode and the motor at a lower output than in the normal operation mode. It is configured to switch between the low power operation mode to operate and
  • the communication board is a pump device configured to transmit measurement data of at least one received sensor to a control device. 2.
  • the sensor unit includes a sensor substrate that is electrically connected to at least one sensor.
  • the control device is set with a predetermined threshold value for measurement data.
  • the control device is configured to gradually or gradually reduce the output of the motor during the low power operation mode until the measurement data of at least one sensor becomes smaller than a predetermined threshold.
  • the sensor unit includes a plurality of sensors, and for each of the plurality of sensors, a first threshold value of measurement data and a second threshold value larger than the first threshold value are set in the control device.
  • control device when the measurement data of at least one of the plurality of sensors is equal to or larger than the first threshold value and all the measurement data of the plurality of sensors are smaller than the second threshold value. In addition, it is configured to start the low power operation mode. Or 2.
  • the control device is configured to gradually or gradually reduce the output of the motor during the low power operation mode until all the measurement data of the plurality of sensors becomes smaller than the first threshold value.
  • the control device is configured to stop the motor when the measurement data of at least one of the plurality of sensors is larger than the second threshold value. Or 5.
  • the inverter is built into the control device. ⁇ 6.
  • the inverter is built into the pump device.
  • the pump device according to any one of. 9.
  • the sensor unit includes at least one of a temperature sensor arranged in the motor chamber of the pump device, a vibration sensor arranged in the motor chamber, and an oil deterioration detector arranged in the lubricating oil chamber of the pump device. 1. 1. ⁇ 8.
  • the sensor portion includes a temperature sensor, and the temperature sensor includes at least one of a load side end coil portion of the motor, a counterload side end coil portion of the motor, a load side bearing of the rotating shaft, and a counterload side bearing of the rotating shaft. Arranged to measure temperature, 9.
  • the sensor unit includes a vibration sensor, and the vibration sensor is arranged so as to measure the vibration of at least one of the load side bearing of the rotating shaft and the counterload side bearing of the rotating shaft.
  • the communication board is a PLC (Power Line Communications) board.
  • the pump device is a submersible pump.
  • a pump system including a pump device and a control device according to any of the above. 15.
  • a reporting device that is electrically connected to the control device, 14.
  • a pump device comprising an impeller, a motor configured to drive a rotating shaft that rotates the impeller, and a sensor unit comprising at least one sensor configured to measure a condition in the pump device. It ’s a control method, The presence or absence of an abnormal state in the pump device is determined based on the measurement data of at least one sensor acquired from the sensor unit, and the motor is set to the normal operation mode and the motor is set to the normal operation mode based on the determination result.
  • a control method that includes the step of switching between low power operation modes that operate at low power. 17.
  • the control device gradually or gradually reduces the output of the motor until the measurement data of at least one sensor becomes smaller than a predetermined threshold value.
  • the sensor unit includes a plurality of sensors, and the control method is For each of the plurality of sensors, a step of setting a first threshold value of measurement data and a second threshold value larger than the first threshold value in the control device that controls the motor, and When the measurement data of at least one of the plurality of sensors is equal to or larger than the first threshold value by the control device, and all the measurement data of the plurality of sensors are smaller than the second threshold value. 16. Including the step of initiating the low power operation mode. The control method described in. 19. 18.
  • the step of gradually or gradually reducing the output of the motor until all the measurement data of the plurality of sensors becomes smaller than the first threshold value is included.
  • the control method described in. 20. 18.
  • the sensor unit includes at least one of a temperature sensor arranged in the motor chamber of the pump device, a vibration sensor arranged in the motor chamber, and an oil deterioration detector arranged in the lubricating oil chamber of the pump device. 16. ⁇ 20.
  • the present invention can be widely applied to pump devices and pump systems.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention vise à procurer un dispositif de pompe avec lequel il est possible de rendre plus court que dans un cas classique le temps d'arrêt d'une pompe immergée quand un état de fonctionnement anormal survient.　A cet effet, l'invention porte sur un dispositif de pompe, lequel dispositif comprend une turbine, et un moteur configuré pour entraîner un arbre rotatif qui fait tourner la turbine, et comprend une unité de capteur comprenant au moins un capteur configuré pour mesurer un état à l'intérieur du dispositif de pompe, et une carte de communication configurée pour recevoir des données mesurées de l'au moins un capteur de l'unité de capteur, le moteur étant connecté à un onduleur qui est commandé par un dispositif de commande ; le dispositif de commande est configuré pour déterminer la présence ou l'absence d'un état anormal à l'intérieur du dispositif de pompe sur la base des données mesurées de l'au moins un capteur, et, sur la base du résultat de détermination, pour commuter le moteur entre un mode de fonctionnement normal et un mode de fonctionnement à faible sortie pour faire fonctionner le moteur avec une sortie inférieure à celle du mode de fonctionnement normal ; et la carte de communication est configurée pour transmettre les données mesurées reçues de l'au moins un capteur au dispositif de commande.
PCT/JP2020/012907 2019-07-01 2020-03-24 Dispositif de pompe, procédé pour commander un dispositif de pompe, et système de pompe WO2021002067A1 (fr)

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JP2019-122985 2019-07-01
JP2019122985A JP2021008855A (ja) 2019-07-01 2019-07-01 ポンプ装置、ポンプ装置の制御方法及びポンプシステム

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0510270A (ja) * 1991-07-04 1993-01-19 Ebara Corp ポンプ装置の過負荷防止装置
US6481973B1 (en) * 1999-10-27 2002-11-19 Little Giant Pump Company Method of operating variable-speed submersible pump unit
JP2008008204A (ja) * 2006-06-29 2008-01-17 Ebara Corp 排水機場の制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0510270A (ja) * 1991-07-04 1993-01-19 Ebara Corp ポンプ装置の過負荷防止装置
US6481973B1 (en) * 1999-10-27 2002-11-19 Little Giant Pump Company Method of operating variable-speed submersible pump unit
JP2008008204A (ja) * 2006-06-29 2008-01-17 Ebara Corp 排水機場の制御装置

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