EP3067564B1 - Groupe motopompe de circulation - Google Patents

Groupe motopompe de circulation Download PDF

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Publication number
EP3067564B1
EP3067564B1 EP15158261.6A EP15158261A EP3067564B1 EP 3067564 B1 EP3067564 B1 EP 3067564B1 EP 15158261 A EP15158261 A EP 15158261A EP 3067564 B1 EP3067564 B1 EP 3067564B1
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EP
European Patent Office
Prior art keywords
control device
circulation pump
pump assembly
fluid
drive motor
Prior art date
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Application number
EP15158261.6A
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German (de)
English (en)
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EP3067564A1 (fr
Inventor
Jacob Saksvold MORTENSEN
Peter Fosmark
Kim Dausen
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Grundfos Holdings AS
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Grundfos Holdings AS
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Priority to EP15158261.6A priority Critical patent/EP3067564B1/fr
Priority to CN201610133121.2A priority patent/CN105952653B/zh
Publication of EP3067564A1 publication Critical patent/EP3067564A1/fr
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Publication of EP3067564B1 publication Critical patent/EP3067564B1/fr
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Classifications

    • 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
    • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • 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
    • F04D15/0088—Testing machines
    • 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
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/06—Lubrication
    • F04D29/061—Lubrication especially adapted for liquid pumps

Definitions

  • the invention relates to a circulating pump unit and in particular a heating circulating pump unit.
  • Umisselzpumpenaggregate are usually formed with wet-running electric drive motors, in which the plain bearings for the rotor by the pumped liquid, usually water, are lubricated. Therefore, prolonged dry running of the bearings can lead to damage and should therefore be avoided.
  • the circulating pump unit has an electric drive motor, which is connected to at least one impeller, so that it can be driven in rotation by the electric drive motor.
  • the electric drive motor is preferably designed as a canned motor, that is, as a wet-running electric drive motor. More preferably, the drive motor to a rotor which is mounted in plain bearings, which are lubricated by a pumped by the circulation pumping liquid.
  • the circulation pump unit is designed to convey water, so that the bearings are lubricated with water.
  • the circulating pump unit also has an electronic control device, which controls or regulates the drive motor.
  • Such a control device may in particular include a frequency converter, via which the rotational speed and preferably the direction of rotation of the drive motor can be adjusted or regulated.
  • the electronic control device is preferably arranged in an electronics housing directly on the drive motor or a stator housing of the drive motor.
  • the control device has at least one first fluid-detection function, which serves to detect at least one property of the fluid which is located in the impeller or is conveyed by the impeller.
  • the control device controls the drive motor in such a way that it rotates successively with two different rotational speeds predetermined by the control device or in different rotational directions.
  • the electrical power consumption is detected by the control device.
  • an evaluation is carried out in order to detect the at least one property of the fluid in the impeller.
  • the power consumption may be different for different fluids, so that it can be concluded by evaluating the power consumption on certain properties or certain fluids.
  • the use of at least two different speeds or directions of rotation has the advantage that a more reliable detection of the property of the fluid to be determined is possible.
  • the plurality of different speeds that is, the at least two different speeds, or the different directions of rotation are preferably applied according to the first fluid detection function immediately after one another, since it can be assumed that the hydraulic state of the system, in which the Ummélzpumpenaggregat is integrated , has not changed in essence.
  • the dry running can not be detected reliably when taking into account the power consumption with only one rotational speed or direction of rotation.
  • the power inputs are detected at different speeds or directions of rotation, further information may be obtained which is sufficient, different characteristics, especially with regard to the viscosity of the fluid.
  • different viscosities or different fluids for example, there are different developments of the friction during the acceleration, and thus the power consumption, which can be detected and distinguished by the control device. So it is possible to consider not only two different speeds, but to select a defined speed curve, for example, a ramp-shaped acceleration and during this continuously or in several steps to record the power consumption and evaluate. For this purpose, the control device can be designed accordingly.
  • the control device is therefore further preferably designed such that the first fluid-detection function at a start-up of Ummélzpumpenaggregates after a standstill, especially during the initial startup of Ummélzpumpenaggregates is executed. Also, a state in which, as described, the bearings are not yet lubricated with the liquid promoted in operation, but optionally with another substance, such as glycerol, can be detected by applying the inventive first fluid detection function of the control device.
  • the control device is designed such that it compares the detected electrical power consumption at the different rotational speeds or in the different directions of rotation and a condition of the fluid in the impeller at a ratio of the detected power consumption, that is, a ratio of the power consumption to each other recognizes. Furthermore, the control device is designed such that it by evaluating the detected electrical power consumption and in particular to the ratio of Power consumption detects if a liquid is in the impeller. So can the normal operating condition be distinguished from dry running. In particular, as stated above, a dry run can be reliably detected even at initial startup of the circulating pump unit.
  • the power consumption will be substantially equal in both directions of rotation, so that the ratio of the power consumptions to one another is substantially equal to one.
  • the impeller is running in a liquid, for example water
  • the power consumption will be higher in one direction of rotation because it has a higher efficiency in a preferred direction of rotation used in normal operation.
  • the ratio of the detected power consumptions to each other is substantially unequal to 1, whereby it can be seen that the fluid in the impeller is a liquid and not a gas.
  • different properties of the fluid can be distinguished, and particularly preferably the dry run can be recognized by the control device.
  • the temperature of the fluid can also be detected by the control device via a sensor and used for the evaluation.
  • control device is designed such that the first fluid detection function is used for a first commissioning of a circulating pump unit until the first time a liquid is detected in the impeller by the evaluation of the detected electrical power consumption.
  • control device may be designed such that the fluid detection function is used only during the initial startup until the first time a liquid is detected in the circulating pump unit. The control device can then be designed so that it no longer applies the first fluid detection function thereafter.
  • control device may be configured such that the first fluid recognition function is again used, for example, even after a longer standstill of the pump unit, which is longer than a predetermined period of time.
  • the control device is designed such that, if the recorded power consumption are the same in both directions of rotation or both speeds, it outputs an error message and / or blocks further operation of the circulating pump unit.
  • substantially equal power inputs in both directions of rotation are indicative of dry running. Therefore, it is preferable that, when such a condition is detected by the control means, the control means prohibits the operation of the circulation pump assembly to prevent damage to the bearings.
  • an error message for example on a display of the control device, is preferably output in order to signal the operator to this state, so that the operator can remedy the situation.
  • the control device is designed such that the first fluid detection function described repeatedly executed is, as long as the evaluation of the detected electrical power consumption shows that there is no liquid in the impeller, that is, a dry run is present. If such a condition is detected, for example, after a predetermined pause, the fluid detection function can be restarted to automatically check whether liquid has since entered the circulation pump unit.
  • the control device simplifies the commissioning of the circulating pump unit since the circulating pump unit does not have to be restarted, but automatically recognizes the condition in which it can start its normal operation.
  • the control device may have a second fluid-detection function, in which the control device during operation, that is, in particular during normal operation of the Umisselzpumpenaggregates, detects the power consumption of the drive motor and compared with at least one predetermined lower limit.
  • this second fluid-detection function thus preferably takes place at the operating speed of the drive motor, which results from the demands placed on the circulating pump unit in the respective operating state, in particular hydraulic requirements. That is, the controller preferably does not select a specific speed for the second fluid detection function, but performs this second fluid detection function during operation at the normal operating speed of the circulating pump unit. This takes place during operation continuously or at intervals.
  • the second fluid detection function may also preferably serve to detect a dry run. If the impeller promotes air instead of a liquid, the hydraulic resistance is lower, so that the power consumption of the drive motor decreases, so this preferably falls below the predetermined lower limit. If this is the case, then a dry run can be detected by the control device.
  • the control device is preferably further configured such that the second fluid recognition function is used after a predetermined property of the fluid in the impeller and in particular a presence of a fluid in the impeller has been detected by means of the first fluid recognition function.
  • the first fluid detection function serve to avoid dry running during startup and in particular the initial startup of Umisselzpumpenaggregates, while after successful initial startup then the second fluid detection function is used in further operation, in particular then later recognize a dry run and the pump unit can be switched off if necessary.
  • the first fluid detection function is preferably used only to detect a liquid in the impeller for the first time.
  • the lower limit in the second fluid recognition function is more preferably a limit curve having a function of the rotational speed of the drive motor. That is, for each speed of the drive motor, there is a corresponding lower limit, so that during operation of the Ummélzpumpenaggregates at each operating speed, a comparison with the lower limit is possible.
  • This lower limit is stored in the control device.
  • the control device is further preferably designed such that when the lower limit for the power consumption falls below the control device outputs an error message and / or stops the drive motor. Since a dry run is detected in particular when falling below the lower limit, it is desirable to suspend the operation of the drive motor in this state to damage to avoid the bearings.
  • an error message is simultaneously output, for example via a display, to the control device in order to signal an error to an operator.
  • the control device can also be designed such that it increases the speed and / or the power of the drive motor for the second fluid detection function at least at intervals, in particular increases the power and / or the rotational speed to a possible maximum value , This can be done either at fixed time intervals or else the control device can make such a speed or power increase only in certain operating states of the circulating pump unit in order to reliably detect a fluid and in particular dry running.
  • the described lower limit, below which the power consumption suggests dry running is very close to the power consumption occurring during normal operation, so that dry running in this operating state may not be reliably detected.
  • control device can be designed such that, upon detection of such an operating state, in which the power consumption is close to the lower limit, it causes a speed increase or increase of power, and then make another check for a possible dry run.
  • the lower limit is farther away from the power consumption occurring during normal operation.
  • the controller can increase the speed for such a review in a short time.
  • control device is designed such that it stops the drive motor falls below the lower limit and after a predetermined period of time, the second fluid detection function under commissioning the drive motor performs again.
  • the control device can automatically check whether liquid is again in the impeller. If this is detected, the control device will resume normal operation of the circulating pump unit.
  • the predetermined period of time may be a predetermined period of time. During this period, the drive motor is preferably out of operation.
  • the control device is further preferably designed such that it switches to a standby state after a predetermined number of startup attempts or after a predetermined period of time in which a startup is not successful, and preferably outputs an error message. If a dry run has been detected with the first fluid detection function or with the second fluid detection function, that is, a power consumption or a ratio of power consumption has been determined, which indicates that there is no liquid in the impeller, are preferably the Fluid recognition functions, as described above, performed repeatedly over a period of time to detect whether there is liquid in the impeller again. If the control device detects liquid in the impeller, it switches the circulating pump unit into normal operation.
  • the Umisselzpumpenaggregat can turn off completely or switch to an idle state and further runs refrain from the fluid detection functions. In such a state, an error message is then preferably issued, which signals to the operator that he must check the circulating pump unit and, for example, must manually restart after venting.
  • Umisselzpumpenaggregat object of the invention is also a method for operating a circulating pump unit, which is preferably a Um dvslzpumpenaggregat, as described above.
  • a first fluid recognition algorithm is provided, which corresponds to the above-described first fluid detection function and according to which a drive motor of Umisselzpumpenaggregates is rotated in turn at two different speeds or in both directions.
  • the two rotational speeds or both directions of rotation are preferably applied immediately after one another in order to ensure that the state, in particular the hydraulic resistance of the connected hydraulic system, does not substantially change in this time span.
  • the electrical power consumption is detected in each case.
  • the detected electrical power consumption for the different speeds or directions of rotation are evaluated to detect at least one property of the fluid and the presence of a liquid in the impeller. This is done in a manner as described above with reference to the circulating pump unit in which this method is used. In this respect, reference is made to the above description.
  • the above-described features and preferred features of the circulating pump unit are preferably also the subject of the method according to the invention.
  • the recorded at different speeds or in different directions of rotation electrical power consumption are compared with each other, wherein a ratio of the power consumption to each other a condition of the fluid is detected in the circulating pump unit.
  • a dry run can be recognized, in particular, by the fact that the recorded power consumptions essentially have the ratio 1 to one another. This corresponds essentially to the same power consumption in both directions of rotation.
  • a second fluid recognition algorithm which corresponds to the above-described second fluid recognition function of the circulating pump unit, is preferably used.
  • the electric power consumption of the drive motor is compared with a lower limit and a fall below this lower limit as a feature for a particular condition of a fluid in the circulating pump unit and especially for a dry run considered .
  • the power consumption for example, from the control device described above, continuously or at predetermined time intervals are detected and compared with a corresponding lower limit.
  • the lower limit may also be a limit curve which depends on the rotational speed.
  • the second fluid recognition algorithm is preferably used when, according to the first fluid recognition algorithm, a certain property of the fluid in the impeller and in particular for the first time a fluid in the impeller has been detected. Also in this regard, reference is made to the above description with reference to the Umisselzpumpenaggregates.
  • circulating pump unit shown is a circulating pump unit, as used for example in heating systems.
  • the circulating pump unit has a pump housing 2 with connections 4 for connection to a hydraulic system.
  • an impeller 6 is arranged, which is connected via a shaft 8 with the rotor 10 of an electric drive motor.
  • the electric drive motor is arranged in a rotor or stator housing 12, which is connected to the pump housing 2.
  • the drive motor is designed as a wet-running motor and has a split tube 14 which is cup-shaped and is arranged in the interior of the rotor 10.
  • the gap tube 14 surrounding the outer circumference of the stator 16 with the Stator coils arranged.
  • the shaft 8 with the rotor 10 is mounted in two plain bearings 18 in the radial direction. Since the interior of the can 14 in conjunction with the interior of the pump housing 2, in which the impeller 6 rotates, is located in the interior of the can 14, a pumped from the impeller 6 liquid, especially water. The conveyed liquid is used to lubricate the bearings 18. In order to ensure adequate lubrication of the bearings 18 in this way, a dry run of the pump unit, in which no liquid is conveyed through the impeller 6, to be avoided.
  • Attached to the stator housing 12 is a terminal box or electronics housing 20, in which an electronic control device 22 is arranged.
  • the control device 22 controls or controls the drive motor and has in particular a frequency converter, via which the coils of the stator 16 are energized.
  • the speed of the drive motor can be changed and controlled via the frequency converter.
  • a display device 24 is further arranged for displaying various operating conditions.
  • the control device 22 has a fluid detection system, which preferably serves to detect whether the impeller 6 is filled with liquid or runs dry.
  • the fluid recognition system is particularly preferably integrated as a software module in the software of the control device 22.
  • the control device 22 has corresponding electronic components, in particular a microprocessor, in order to carry out the required functions and software modules.
  • the fluid recognition system has two fluid recognition functions or fluid recognition algorithms A1 and A2.
  • the first fluid recognition algorithm A1 and the second fluid recognition algorithm A2 are used in different operating states of the pump set.
  • step S1 a query is made as to whether a liquid has ever been detected in the circulating pump unit with the aid of the first fluid recognition algorithm A1.
  • the control device 22 has a memory in which upon initial detection of liquid in the impeller 6 with the aid of the first fluid recognition algorithm A1, a value representing this state is set permanently, so that this value is maintained even if the circulating pump unit is temporarily switched off ,
  • the memory is preferably designed so that it also stores the value in the de-energized state, so that it is permanently stored in the pump unit, whether the pump unit was ever filled with liquid.
  • step S1 If it is determined in step S1 when interrogating the value stored in the memory that liquid has never been detected in the circulating pump unit (N), the first fluid recognition algorithm A1 is subsequently started in step S2. If, on the other hand, the question as to whether the circulating pump unit was ever filled with liquid in step S1 is answered by querying the memory of the control device 22 with yes (Y), the second fluid recognition algorithm A2 is subsequently started in step S3. If the first fluid recognition algorithm, which is started in step S2, later detects liquid in the impeller 6 in the manner described below, the second fluid recognition algorithm A2 is subsequently also started, as in FIG Fig. 2 shown.
  • Fig. 3 shows the flow of the first fluid detection algorithm.
  • the stator 16 is initially energized by the control device 22 in step S4 in such a way that the rotor rotates in a first direction of rotation CW, for example in a clockwise direction. While This rotation is detected by the control device 22, the electrical power consumption of the drive motor. Subsequently, we stopped the drive motor and after a break in the form of the time t 1 , for example 15 seconds, the stator 16 is energized in the following step S5 of the controller 2 such that the rotor 10 in an opposite second direction of rotation CCW, for example counter clockwise, turns. Preferably, this second direction of rotation CCW is the direction of rotation in which the drive motor rotates during normal operation. Also during this operation of the drive motor, the electric power consumption is detected by the control device 22.
  • step S6 an evaluation of the electrical power consumptions detected in the two directions of rotation CW and CCW is then carried out by the control device 22. If the power consumptions are substantially equal, this indicates that there is no water in the impeller 6, as this so opposes substantially no resistance to the drive motor. The occurring resistance is thus essentially caused by the bearings 18 and is substantially the same in both directions of rotation CW and CCW.
  • the question of water in the impeller is answered in the step S6 in the evaluation with no (N) and it is carried out in the following step S7, the stop of the drive motor.
  • the drive motor could be stopped even before the execution of step S6 and would then only be halted in step S7.
  • step S 4 After a period of time t 2 , for example 30 seconds, the step S 4 then starts again to check again whether there is liquid in the impeller 6. If different power consumptions for the two directions of rotation CW and CCW are detected in step S6, then this speaks for water in the impeller 6 and the query in step S6 is answered accordingly with yes (Y). Subsequently, in step S8, the second fluid recognition algorithm A2 is started and stored simultaneously in the control device 22, that for the first time liquid was detected in the impeller 6. On the storage of the corresponding value is when restarting the Umdozenslzpumpenaggregates, as based on Fig. 2 explained, then resorted to in step S1.
  • the sequence of the second fluid recognition algorithm A2 is based on the Fig. 4-6 described.
  • This in Fig. 4 The diagram shown shows the electrical power P plotted against the rotational speed N. In operation, for example, results in the power curve P1, that is, with higher speed increases the power absorbed.
  • the second fluid recognition algorithm A2 takes place during normal operation of the circulating pump unit, that is, in this the speed of Ummélzpumpenaggregates is not specifically set for fluid detection, but the speed is set by the controller 22 according to the hydraulic requirements of the circulating pump unit.
  • the second fluid recognition algorithm A2 starts, as in FIG Fig. 5 shown with normal operation NB.
  • the Control device 22 according to the second fluid recognition algorithm A2 in step S9 running, whether the electric power approaches the limit curve 30 or below. If a reaching of the limit curve 30 is detected by the control device 22 and in particular an undershooting, an inquiry follows in step S10 as to whether a time interval t 3 has elapsed since the last dry run check. If the time period t 3 , which is permanently stored in the control device 22, has not yet expired (N), the control device 22 returns to the normal operation NB according to step S9.
  • step S10 If it is determined in step S10 that the time period t 3 has elapsed (Y), the speed is increased in step S11 to the maximum speed N max for checking the dry-running.
  • This has the advantage that it is changed to an operating state in which the electrical power occurring in normal operation deviates more strongly from the electrical power occurring in dry running (region 28) and thus the dry run can be better detected.
  • the time period t 3 prevents the circulating pump unit changes during operation too often for no reason to the maximum speed N max or maximum power. It is assumed that not so sudden a loss of fluid in the rotor chamber, in which the bearings 18 are located, occurs that no adequate lubrication of the bearing 18 would be more.
  • step S 12 If, at the maximum rotational speed N max, it is determined in step S 12 that the electrical power consumption is above the limit curve 30 and thus no dry run is given (N), normal operation NB is changed according to step S 9. If the electric power consumption is below the limit curve 30 even at maximum rotational speed N max , it is concluded that there is dry running and the query in step S 12 is answered in the same way with yes (Y), so that subsequently in step S 13 the circulating pump unit is stopped and a self-test is performed Fig. 6 is started.
  • step S13 which is based on Fig. 5 was explained.
  • step S14 an error message or other suitable alarm is displayed.
  • step S15 a query is made as to whether, after the stop in step S13, a predetermined period of time t 4 , which is stored in the control device 22, has expired. This prevents re-checking for dry running immediately after stopping. If the time period t 4 has not yet elapsed (N), the system returns to step S13.
  • step S16 After elapse of the time period t 4 (Y), the display 24 indicates in step S16 that a self-test starts and then the drive motor is started again in step S17. Again, the second fluid recognition algorithm A2 is used. If, according to this, it is determined in step S18, as explained above with reference to step S9, that the electrical power consumption is safely above the limit curve 30 and consequently no dry run is present (N), then the system returns to normal operation NB and the sequence according to FIG Fig. 5 begins again with step S9.
  • step S18 If, however, it is determined in step S18 that when the circulating pump unit is started up at the speed according to normal operation NB, the electrical power consumption is at low speed in the vicinity of the limit curve 30 (Y), then in step S19 corresponding to step S11, the speed is increased again to the maximum speed N max . Subsequently, in step S20, which corresponds to step S12 described above, it is checked whether the absorbed power is above or below the limit curve 30. If it is not below the limit curve 30 and thus no dry run is detected, the query is answered in step S20 with no (N) and it is transferred to the normal operation NB according to step S9.
  • step S21 a query is made in step S21 as to whether a time limit T has been reached since the beginning of step S13.
  • the time limit T may be, for example, a time of 72 hours and is stored permanently in the control device 22. If the time limit T has not yet been reached (N), the described self-test starts again with step S13. However, if the time limit T is reached (Y), a permanent stop of the circulating pump unit preferably with a corresponding error message on the display device 24 takes place in step S22. This permanent stopping of the circulating pump unit means that no further self-checks as to whether liquid is again present in the impeller 6 , and the circulating pump unit must be restarted manually.
  • step S23 This can be done in step S23, for example by pressing a corresponding control element 32 on the electronics housing 20, where appropriate, several of the controls 32 must be pressed simultaneously or sequentially to take the circulating pump unit back into operation. Thereafter, the self-test starts again in step S13. Alternatively, the circulating pump unit can be disconnected from the mains. Thereafter, at startup, the procedure would revert to step S1 Fig. 2 start.
  • the use of the first fluid recognition algorithm A1 and the second fluid recognition algorithm A2 forms a two-stage process, which ensures that a state can be detected in which the bearings 18 are lubricated not with the liquid to be conveyed but with a previously introduced lubricant, such as glycerol, which has a higher viscosity.
  • a previously introduced lubricant such as glycerol
  • the higher viscosity leads to a higher friction, which could lead to a power consumption in operation, which above the in Fig. 4 shown limit curve 30, so that with the second fluid detection algorithm A2 this state could not be reliably detected. Therefore, during initial startup, the first fluid recognition algorithm A1 is used in order to be able to recognize this condition as well.
  • the first fluid recognition algorithm A1 could also be used later, that is to say after initial startup, in contrast to the example shown, for example in order to be able to recognize different liquids, for example liquids of different viscosity , Therefore, it is assumed that upon rotation of the impeller 6, in the intended direction of rotation, the hydraulic resistance is different than in the opposite direction of rotation. Also by changing the rotational speed, different fluids can be differentiated from the control device 22 in accordance with the second fluid recognition algorithm A2 due to the resulting different performance curves.

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

Claims (18)

  1. Groupe motopompe de circulation comprenant un moteur électrique d'entraînement (10, 16) à rotor immergé, au moins une turbine (6) entraînée par le moteur électrique (10, 16), ainsi qu'un dispositif de commande électronique qui commande le moteur d'entraînement (10, 16),
    caractérisé en ce que le dispositif de commande (22) comprend au moins une première fonction de reconnaissance de fluide (A1) à laquelle le dispositif de commande (22) commande le moteur d'entraînement (10, 16) de façon telle qu'il tourne successivement à au moins deux vitesses de rotation différentes ou dans des sens de rotation différents (CW, CCW), le dispositif de commande (22) saisissant chaque fois la puissance électrique (P) absorbée et reconnaissant, sur la base d'une exploitation des puissances électriques absorbées (P) saisies pour les différentes vitesses de rotation ou sens de rotation (CW, CCW), si un liquide ou de l'air se trouve dans la turbine.
  2. Groupe motopompe de circulation selon la revendication 1, caractérisé en ce que le dispositif de commande (22) est configuré de façon qu'il compare, les unes aux autres, les puissances électriques absorbées (P) saisies pour les différentes vitesses de rotation ou sens de rotation (CW, CCW), et reconnaît par le rapport entre les différentes puissances absorbées saisies, si un liquide se trouve dans la turbine (6).
  3. Groupe motopompe de circulation selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (22) est configuré de façon que la première fonction de reconnaissance de fluide (A1) soit mise en oeuvre lors d'une mise en fonctionnement du groupe motopompe de circulation après un arrêt.
  4. Groupe motopompe de circulation selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (22) est configuré de façon que, lorsque les puissances absorbées saisies sont les mêmes dans les deux sens de rotation (CW, CCW), il émet un message d'erreur et/ou bloque une poursuite du fonctionnement du groupe motopompe de circulation.
  5. Groupe motopompe de circulation selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (22) est configuré de façon que la première fonction de reconnaissance de fluide (A1) soit mise en oeuvre à répétition jusqu'à ce que l'exploitation des puissances électriques absorbées saisies indique qu'il n'y a plus de liquide dans la turbine (6).
  6. Groupe motopompe de circulation selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (22) est configuré de façon que la première fonction de reconnaissance de fluide (A1) soit mise en application lors d'une première mise en fonctionnement du groupe motopompe de circulation jusqu'à ce que, par l'exploitation des puissances électriques absorbées saisies, un liquide soit reconnu pour la première fois dans la turbine (6).
  7. Groupe motopompe de circulation selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (22) comprend une deuxième fonction de reconnaissance de fluide (A2) à laquelle le dispositif de commande (22), en fonctionnement du groupe motopompe de circulation, saisit la puissance absorbée du moteur d'entraînement (10, 16) et la compare à au moins une limite inférieure prédéterminée (30).
  8. Groupe motopompe de circulation selon la revendication 7, caractérisé en ce que le dispositif de commande (22) est configuré de façon que la deuxième fonction de reconnaissance de fluide (A2) soit mise en application lorsque, par la première fonction de reconnaissance (A1), une caractéristique prédéterminée du fluide dans la turbine (6) et notamment une présence d'un liquide dans la turbine (6), a été reconnue.
  9. Groupe motopompe de circulation selon la revendication 7 ou 8, caractérisé en ce que la limite inférieure est une courbe limite (30) qui est fonction de la vitesse de rotation (N) du moteur d'entraînement (10, 16).
  10. Groupe motopompe de circulation selon l'une des revendications 7 à 9, caractérisé en ce que le dispositif de commande (22) est configuré de façon que, en cas de passage en-dessous de le limite inférieure (30) pour la puissance absorbée (P), le dispositif de commande (22) émet un message d'erreur et/ou arrête le moteur d'entraînement (10, 16).
  11. Groupe motopompe de circulation selon l'une des revendications 7 à 10, caractérisé en ce que le dispositif de commande (22) est configuré de façon qu'il augmente pour la deuxième fonction de reconnaissance de fluide (A2), au moins dans des intervalles de temps, la vitesse de rotation (N) et/ou la puissance (P) du moteur d'entraînement (10, 16).
  12. Groupe motopompe de circulation selon l'une des revendications 7 à 11, caractérisé en ce que le dispositif de commande (22) est configuré de façon que, en cas de passage en-dessous de la limite inférieure (30), il arrête le moteur d'entraînement (10, 16) et, après un certain lapse de temps (t4), met la deuxième fonction de reconnaissance de fluide (A2) de nouveau en oeuvre, tout en mettant en fonctionnement le moteur d'entraînement (10, 16).
  13. Groupe motopompe de circulation selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande (22) est configuré de façon que, après un nombre prédéterminé d'essais de mise en fonctionnement ou après un lapse de temps (T) prédéterminé pendant lequel une mise en fonctionnement n'a pas réussi, il commute vers un état de repos et émet, de préférence, un message d'erreur.
  14. Procédé pour faire fonctionner un groupe motopompe de circulation qui est notamment configuré selon l'une des revendications précédentes, caractérisé par un premier algorithme de reconnaissance de fluide (A1) selon lequel un moteur d'entraînement (10, 16) du groupe motopompe de circulation est fait tourner successivement à deux vitesses de rotation différentes ou dans les deux sens de rotation (CW, CCW), la puissance électrique absorbée (P) respective étant saisie en même temps et ensuite, par exploitation des puissances électriques absorbées (P) saisies pour les différentes vitesses de rotation ou sens de rotation (CW, CCW), la présence d'un liquide dans la turbine (6) étant reconnue.
  15. Procédé selon la revendication 14, caractérisé en ce que les deux puissances électriques absorbées (P) saisies à des vitesses de rotation différentes ou lors de sens de rotation différents (CW, CCW), sont comparées l'une à l'autre, un état du fluide dans le groupe motopompe de circulation étant reconnu par le biais d'un rapport entre les puissances absorbées.
  16. Procédé selon la revendication 14 ou 15, caractérisé en ce que des puissances absorbées égales pour les deux sens de rotation (CW, CCW) sont considérées comme indicateur d'un fonctionnement à sec.
  17. Procédé selon l'une des revendications 14 à 16, caractérisé par un deuxième algorithme de reconnaissance de fluide (A2) selon lequel, lors d'un fonctionnement du groupe motopompe de circulation, la puissance électrique absorbée du moteur d'entraînement (10, 16) est comparée à une limite inférieure et un passage en-dessous de la limite inférieure (30) est considéré comme indicateur d'un état particulier d'un fluide dans le groupe motopompe de circulation et notamment d'un fonctionnement à sec.
  18. Procédé selon la revendication 17, caractérisé en ce que le deuxième algorithme de reconnaissance (A2) est appliqué après qu'une caractéristique particulière du fluide dans la turbine (16) et notamment un liquide dans la turbine (16) a été constaté selon le premier algorithme de reconnaissance (A1).
EP15158261.6A 2015-03-09 2015-03-09 Groupe motopompe de circulation Active EP3067564B1 (fr)

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EP3376040B1 (fr) * 2017-03-14 2019-10-30 Grundfos Holding A/S Groupe motopompe
DE102017004097A1 (de) * 2017-04-28 2018-10-31 Wilo Se Verfahren zur Detektion eines abnormalen Betriebszustands eines Pumpenaggregats
DE102019208148A1 (de) * 2019-06-05 2020-12-10 Robert Bosch Gmbh Verfahren zu einem Betrieb zumindest einer Fluidfördervorrichtung
EP3838082A1 (fr) * 2019-12-19 2021-06-23 Koninklijke Philips N.V. Système de distribution d'écoulement

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EP0967475B1 (fr) * 1998-06-22 2007-11-28 Levitronix LLC Méthode pour la détermination de la viscosité d' un liquide
DE10064717A1 (de) * 2000-12-22 2002-07-11 Grundfos As Verfahren zum Betreiben eines Pumpenaggregats
DE10101099B4 (de) * 2001-01-12 2006-09-14 Schmalenberger Gmbh & Co Verfahren zum Überwachen des Trockenlaufs einer Förderpumpe und nach dem Verfahren arbeitende Förderpumpe
EP2453560B1 (fr) * 2010-11-11 2022-11-02 Grundfos Management a/s Groupe motopompe
CN103104509B (zh) * 2013-02-25 2015-01-21 天津大学 变频水泵全工况运行状态获取方法
SE1350552A1 (sv) * 2013-05-07 2014-11-08 Xylem Ip Man S R L Metod för styrning av en del av en pumpstation
CN103899542B (zh) * 2014-04-15 2016-04-27 合肥华升泵阀股份有限公司 一种串并联离心泵

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