EP3592980B1 - Verfahren zum betrieb einer umwälzpumpe sowie umwälzpumpe zur verfahrensausführung - Google Patents

Verfahren zum betrieb einer umwälzpumpe sowie umwälzpumpe zur verfahrensausführung Download PDF

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Publication number
EP3592980B1
EP3592980B1 EP18711027.5A EP18711027A EP3592980B1 EP 3592980 B1 EP3592980 B1 EP 3592980B1 EP 18711027 A EP18711027 A EP 18711027A EP 3592980 B1 EP3592980 B1 EP 3592980B1
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EP
European Patent Office
Prior art keywords
pump
operating
operating point
characteristic map
reference characteristic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18711027.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3592980A1 (de
Inventor
Martin Eckl
Patrick Hauck
Stefan Laue
Joachim Schullerer
Gerd Ebelt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KSB SE and Co KGaA
Original Assignee
KSB SE and Co KGaA
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Publication date
Application filed by KSB SE and Co KGaA filed Critical KSB SE and Co KGaA
Publication of EP3592980A1 publication Critical patent/EP3592980A1/de
Application granted granted Critical
Publication of EP3592980B1 publication Critical patent/EP3592980B1/de
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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
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • 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

Definitions

  • the present invention relates to a method for operating a circulating pump, in particular a heating circulating pump, which is characterized by a variable-speed pump drive.
  • the operating noise of the pump can be transmitted through the pipe system into the living space, which residents generally find annoying. For this reason, the lowest possible noise emission from the pump during operation is desirable.
  • the noise emission of the pump is variable and depends on the current operating point of the pump.
  • the operating point represents the point of intersection between the control characteristic and the system characteristic.
  • the pump delivers a specific flow rate with a specific delivery head.
  • the pump operating point can be varied by adjusting the engine speed.
  • the resulting noise emissions do not necessarily increase with increasing speed, since natural vibrations of the pump in connection with vibrations in the line system contribute to noise development. For this reason it can happen that the pump works comparatively quietly at certain operating points, while other operating points, possibly also at low speed, can lead to disturbing noise emissions.
  • the DE 35 20 734 A1 describes a generic method for operating a centrifugal pump.
  • the U.S. 2006/0237044 A1 shows a pump of a dishwasher.
  • the DE 35 03 741 A1 discloses a method for controlling the power of pumps with variable flow rates in heating systems.
  • a solution is therefore being sought that will reduce the noise generated by the pump, at least where necessary, so that disturbing noises in the living area are suppressed as far as possible.
  • a method for operating a circulating pump in which the pump controller modifies the currently set operating point of the pump controller in order to reduce the noise emission of the pump.
  • the circulation pump is typically a centrifugal pump.
  • the pump control initially determines the necessary manipulated variable for the engine speed depending on the required target delivery head.
  • the pump controller then checks the initially defined operating point for the resulting noise emissions from the pump and, if necessary, adjusts the operating point in order to reduce the noise emissions from the pump. As a result, there is a slight shift in the pump operating point.
  • the pump controller increases the speed for the specific operating point of the pump in order to reduce noise emissions. This is preferably increased until the desired noise emission occurs or until a sufficient level is reached Reduction of the operating volume results. Increasing the speed is expedient, as this ensures a sufficient target delivery head. The higher energy consumption caused by the increase in speed is accepted with regard to reduced noise emissions.
  • the pump controller has access to at least one acoustic reference characteristic map, which includes an assignment of the noise emissions of the pump to a large number of different operating points.
  • the pump controller can therefore derive the theoretical noise emissions for the respective operating point from the map. This procedure makes sense because the actual noise emissions cannot be measured in practice, or only with enormous effort, or the integration of a suitable sensor system is not economically feasible.
  • a solution with direct measurement of the noise emission by an integrated sensor system should not be ruled out by the invention.
  • the acoustic reference field should preferably be stored in a local memory of the pump controller. Access to an external memory using a suitable communication interface is also conceivable.
  • the pump control can estimate the resulting noise emission of the pump and - if this is classified as too high, e.g. is above a definable limit value - improve the noise emission by increasing the speed.
  • the speed of the pump is increased until an operating point of the acoustic reference map with lower or sufficiently low noise emission is reached.
  • the acoustic reference map contains exclusively or predominantly operating points with unfavorable noise emissions.
  • the pump control only modifies the speed if the originally set operating point corresponds to an operating point contained in the reference map.
  • the required acoustic reference map is determined, for example, by the manufacturer of the pump using a reference pump and is stored in a local memory of the pump controller before the pump is delivered. Since in practice there can often be manufacturing tolerances and thus deviations in the operating behavior between individual pumps of the same series, the acoustic reference map used reflects the actual acoustic behavior of the respective pump only insufficiently. The installation conditions at the pump's place of use can also influence the accuracy of the reference map.
  • the pump control has access to a so-called comparison reference characteristic map, which for a large number of operating points of the pump is one of the operating point dependent and measurable pump operating variable.
  • This pump operating variable can be measured precisely during ongoing pump operation. Deviations of the measured pump operating variable from the pump operating variable contained in the comparison reference map at the respective operating point serve as an indicator for a possible deviation or shift of the acoustic reference map from the real acoustic behavior of the pump.
  • Measuring the acceleration of the pumped medium and/or the driven pump impeller and/or the pump housing has proven to be a suitable operating variable.
  • the acceleration can be measured using a suitable sensor on the pump either directly or indirectly using other measured variables. If the acceleration of the pump housing is measured, it should be recorded as close to the pump impeller as possible.
  • the level of the difference between the measured acceleration and the reference acceleration is an indication of a shift in the acoustic reference characteristic curve from the real acoustic characteristic curve of the pump during ongoing pump operation.
  • the degree of displacement is taken into account by the pump control when modifying the operating point, i.e. increasing the pump speed.
  • the implementation of the method achieves an optimization of the noise emission, but at the expense of a higher energy consumption due to the increase in speed.
  • the execution of the method can be manually activated or deactivated by the consumer using an input element. It is also conceivable to link the execution of the method to specific external circumstances, for example to the time of day or to some other automatic system control of a heating system.
  • the present object is also achieved by a circulating pump, in particular a heating circulating pump, with a corresponding pump control for carrying out the method according to the present invention. Accordingly, the same advantages and properties result for the circulating pump as have already been explained above with regard to the method according to the invention. For this reason, a repeated description is dispensed with.
  • the circulation pump is typically a centrifugal pump.
  • the circulating pump according to the invention preferably includes a suitable sensor for detecting the pump operating variable of the comparison reference characteristic map, in particular an acceleration sensor which is fitted at a suitable position on the pump housing and detects the acceleration experienced by the pumped medium and/or the impeller during pump operation. If the acceleration of the pump housing is measured, it should be recorded as close as possible to the pump impeller, ie the sensor should be attached to the pump housing in close proximity to the impeller.
  • the present invention proposes the implementation of creep operation for a heating circulating pump.
  • the end user can activate this function as required via an accessible rotary wheel on the pump.
  • the acoustic emission is recorded at different operating points on a suitable test bench during the development phase of the circulating pump. It makes sense to use a reference pump to generate the reference maps. Many operating points are approached on the test bench and the operating volume of the reference pump is recorded at the respective operating points.
  • the association between operating points and volume values is stored as a matrix and referred to below as the acoustic reference map.
  • FIG 1 shows an example of the generated acoustic reference map.
  • Each operating point of the pump is defined by the flow rate Q and the associated delivery head H of the pump.
  • the operating points measured as examples are identified in the diagram by the circular points drawn in.
  • the noise emission of the pump recorded at these operating points is indicated by different gray coloring of the points according to the gray scale shown on the right in the illustration.
  • the method presented assumes that the pump knows exactly its acoustic behavior at each operating point.
  • the real acoustic map of a conventional pump can shift slightly compared to the reference pump. This is due to manufacturing and assembly tolerances. So that the pump is able to independently determine the influence of these tolerances on its acoustic characteristics, the use of an acceleration sensor on the pump housing is proposed, which records the acceleration experienced by the pump housing.
  • a further comparison reference map is recorded in addition to this, which shows the signals from the acceleration sensor as a function of the operating points approached.
  • this additional map is referred to as the acceleration reference map.
  • the commercial pump can then compare the data from its acceleration sensor with the acceleration reference map.
  • a shift between the acoustic reference map and the real (non-measurable) acoustic map can also be inferred from the shift between the measured acceleration and the acceleration of the reference map acceleration.
  • FIG 2 shows this procedure as an example.
  • Reference number 10 designates the reference pump. With the aid of the reference pump 10, an acoustic reference map 11 is recorded by test drives. A reference map for acceleration 12 is immediately determined, with possible correlations between the two different reference maps 11, 12 then being determined. This information is then kept ready in the local memory of the commercial pumps 20, so that the respective pump controller of the commercial pumps 20 can use it to carry out the method.
  • the real acceleration characteristics map 13 is determined with the aid of the integral acceleration sensor and is compared with its reference characteristics map 12 . The knowledge that can be obtained from this is also used to determine deviations in the acoustic reference characteristic map 11 from the characteristic map 14 of the pump 20 actually present in practice. On the basis of this procedure, the emitted noise emission of the pump can be determined with sufficient accuracy for the respective commercial pump 20 in pump operation and the control can be adjusted accordingly.
  • creep mode i.e. the execution of the process, is deactivated as the standard setting, but can be activated by appropriate user input if necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP18711027.5A 2017-03-10 2018-02-28 Verfahren zum betrieb einer umwälzpumpe sowie umwälzpumpe zur verfahrensausführung Active EP3592980B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017203960.4A DE102017203960A1 (de) 2017-03-10 2017-03-10 Verfahren zum Betrieb einer Umwälzpumpe sowie Umwälzpumpe zur Verfahrensausführung
PCT/EP2018/054888 WO2018162291A1 (de) 2017-03-10 2018-02-28 Verfahren zum betrieb einer umwälzpumpe sowie umwälzpumpe zur verfahrensausführung

Publications (2)

Publication Number Publication Date
EP3592980A1 EP3592980A1 (de) 2020-01-15
EP3592980B1 true EP3592980B1 (de) 2022-06-22

Family

ID=61628302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18711027.5A Active EP3592980B1 (de) 2017-03-10 2018-02-28 Verfahren zum betrieb einer umwälzpumpe sowie umwälzpumpe zur verfahrensausführung

Country Status (5)

Country Link
EP (1) EP3592980B1 (zh)
CN (1) CN110382872B (zh)
DE (1) DE102017203960A1 (zh)
RU (1) RU2766499C2 (zh)
WO (1) WO2018162291A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3825553B1 (en) * 2019-11-25 2024-01-10 Grundfos Holding A/S Method for controlling a water utility system using a user perception of noise
CN116113766A (zh) 2020-08-28 2023-05-12 Ksb股份有限公司 控制组件

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3503741A1 (de) * 1985-02-05 1986-08-07 Heinz Schilling KG, 4152 Kempen Verfahren zur effektiven leistungsregelung von pumpen bei variablen volumenstroemen in heizungssystemen oder auch fuer andere systeme mit anderen medien
DE3520734A1 (de) * 1985-06-10 1986-12-11 Kraftwerk Union AG, 4330 Mülheim Verfahren und einrichtung zum betrieb einer kreiselpumpe
US4844621A (en) 1985-08-10 1989-07-04 Nippondenso Co., Ltd. Fuel pump with passage for attenuating noise generated by impeller
LU90867B1 (en) 2001-12-21 2003-06-24 Delphi Tech Inc Method for controlling the boost pressure of a turbocharged internal combustion engine
DE602006000840T2 (de) * 2005-03-30 2009-04-09 Lg Electronics Inc. Kühlvorrichtung und Steuerverfahren dafür
US20060237044A1 (en) * 2005-04-25 2006-10-26 Ferguson Jerry W Dishwasher with controlled induction motor/pump
DE102006049440B4 (de) 2005-10-17 2014-08-21 Ifm Electronic Gmbh Verfahren, Sensor und Diagnosegerät zur Pumpendiagnose
DE102009005154A1 (de) * 2009-01-15 2010-07-22 Wilo Se Vorrichtung zur Verbindung einer elektromotorischen Antriebseinheit mit einer Pumpeneinheit
DE102011082635A1 (de) 2011-09-14 2013-03-14 Continental Teves Ag & Co. Ohg Erkennung eines fehlerhaft bestimmten Pumpenstellwerts
DK2985536T3 (en) * 2014-08-15 2018-07-16 Grundfos Holding As Method for regulating a pump assembly

Also Published As

Publication number Publication date
CN110382872B (zh) 2021-07-02
EP3592980A1 (de) 2020-01-15
WO2018162291A1 (de) 2018-09-13
RU2019131527A3 (zh) 2021-06-09
DE102017203960A1 (de) 2018-09-13
RU2019131527A (ru) 2021-04-12
CN110382872A (zh) 2019-10-25
RU2766499C2 (ru) 2022-03-15

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