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EP3543537B2 - Groupe pompe ainsi que procédé de surveillance d'alimentation en liquide dans un dispositif d'étanchéité dans un groupe pompe - Google Patents
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EP3543537B2 - Groupe pompe ainsi que procédé de surveillance d'alimentation en liquide dans un dispositif d'étanchéité dans un groupe pompe - Google Patents

Groupe pompe ainsi que procédé de surveillance d'alimentation en liquide dans un dispositif d'étanchéité dans un groupe pompe

Info

Publication number
EP3543537B2
EP3543537B2 EP18163562.4A EP18163562A EP3543537B2 EP 3543537 B2 EP3543537 B2 EP 3543537B2 EP 18163562 A EP18163562 A EP 18163562A EP 3543537 B2 EP3543537 B2 EP 3543537B2
Authority
EP
European Patent Office
Prior art keywords
sensor
pump assembly
concentration
temperature
reading
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
EP18163562.4A
Other languages
German (de)
English (en)
Other versions
EP3543537A1 (fr
EP3543537B1 (fr
Inventor
Gert Friis Eriksen
Jens Kjær Milthers
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.)
Grundfos Holdings AS
Original Assignee
Grundfos Holdings AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=61763861&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3543537(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Grundfos Holdings AS filed Critical Grundfos Holdings AS
Priority to EP18163562.4A priority Critical patent/EP3543537B2/fr
Priority to US16/361,525 priority patent/US11143190B2/en
Priority to CN201910227128.4A priority patent/CN110296099B/zh
Publication of EP3543537A1 publication Critical patent/EP3543537A1/fr
Application granted granted Critical
Publication of EP3543537B1 publication Critical patent/EP3543537B1/fr
Publication of EP3543537B2 publication Critical patent/EP3543537B2/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • F04D13/16—Pumping installations or systems with storage reservoirs
    • 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
    • F04D15/0077—Safety measures
    • 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps
    • F04D29/108—Shaft sealings especially adapted for liquid pumps the sealing fluid being other than the working liquid or being the working liquid treated
    • 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps

Definitions

  • the invention relates to a pump unit and a method for monitoring or detecting a change in concentration in a liquid reservoir in a sealing arrangement in a pump unit.
  • a seal flushing system is known, according to which a seal is flushed to prevent the penetration of substances into the seal and to ensure adequate lubrication of the seal.
  • a concentration sensor is arranged in the seal flushing system.
  • this system requires a system for circulating the fluid for flushing the seal.
  • a pump unit with an electric drive motor and at least one impeller connected to the drive motor via a shaft is known, wherein the shaft extends between the drive motor and the impeller through at least one sealing arrangement with a liquid reservoir.
  • the pump unit comprises an electric drive motor and at least one impeller connected to the drive motor via a shaft.
  • the shaft extends between the drive motor and the impeller through at least one sealing arrangement.
  • This sealing arrangement has a liquid reservoir.
  • the sealing arrangement has at least two seals, between which the liquid reservoir is designed in the form of a liquid-filled chamber.
  • the liquid reservoir serves to detect leaks and prevent water from directly penetrating the dry motor compartment.
  • the liquid in the chamber can serve for cooling.
  • the electric drive motor is preferably designed to run dry. This means that the sealing arrangement is located between the liquid-filled pump chamber in which the impeller rotates and the dry electric drive motor.
  • the pump chamber can be filled with water, in particular, if the pump unit is designed to pump water, for example fresh water or wastewater.
  • At least one concentration sensor for detecting a change in concentration in the liquid reservoir is formed on the liquid reservoir.
  • the concentration sensor can, for example, be designed to detect the concentration of a second liquid in a first liquid in the liquid reservoir, in particular the concentration of water in glycol or vice versa.
  • other liquid mixtures can also be used, in particular mixtures of more than two liquids.
  • an oil-glycol mixture may optionally contain further additives.
  • the concentration sensor is designed to detect changes in an initially set concentration of the various liquids in the liquid reservoir.
  • the concentration sensor can be designed such that it is immersed in the liquid or detects the concentration non-contactingly from the outside, e.g., through a partition wall.
  • At least one second sensor for detecting at least one further parameter of the liquid reservoir is also arranged on or in the liquid reservoir. Both the concentration sensor and the at least one second sensor are connected to an evaluation device such that the evaluation device can receive and further process the measured values recorded by the sensors.
  • the evaluation device can be integrated into an electronic control or regulating device arranged directly on the pump unit, in particular a control device for controlling or regulating the drive motor.
  • the evaluation device can be arranged, for example, in an electronics housing of the pump unit.
  • the evaluation device or parts of the evaluation device could also be integrated directly into the sensor or a sensor housing of the first and/or second sensor. It is also conceivable to distribute the functionality of the evaluation device across multiple electronic units or processors in different components.
  • the evaluation device is designed such that it evaluates at least one measured value from the concentration sensor, taking into account at least one measured value detected by the at least one second sensor.
  • the parameter detected by the second sensor can be a parameter that characterizes a specific operating state or characterizes changes in the operating states and/or ambient conditions. This makes it possible to compensate or correct the changes in the measured value of the concentration sensor based on the measured values of the at least one second sensor, thus enabling a more precise concentration measurement.
  • multiple second sensors can also be provided, or a second sensor that detects more than one parameter simultaneously.
  • the second sensor can detect the temperature and/or pressure, or alternatively or additionally, vibrations and/or structure-borne sound.
  • the at least one second sensor is a temperature sensor or a sensor that detects at least one temperature-dependent parameter.
  • a temperature-dependent parameter can be any parameter that is dependent on the temperature, in particular, is proportional to the temperature. Such a temperature-dependent parameter thus enables indirect temperature detection.
  • the evaluation device is designed to evaluate at least one measured value from the concentration sensor, taking into account at least one temperature measurement or temperature-dependent parameter detected by the at least one second sensor.
  • the evaluation device is designed to correct or compensate for the measured value from the concentration sensor based on the temperature measurement or temperature-dependent parameter detected by the at least one second sensor. 10 In this way, the temperature influence on the concentration measurement can be eliminated. This correction can be based directly on a detected temperature measurement or on a temperature-dependent parameter, for example, a vibration signal. This results in direct or indirect temperature-dependent compensation.
  • the concentration sensor is designed as an optical sensor.
  • a first possible consideration of different operating states when detecting concentration changes by the concentration sensor can be achieved by designing the evaluation device such that it only evaluates a measured value from the concentration sensor if the measured value detected by the at least one second sensor, i.e., a temperature measured value detected by the second sensor, is below a predetermined maximum limit, preferably a predetermined maximum temperature limit. This means, for example, that the concentration measurement can be suspended above a certain operating temperature at which reliable measurement results can no longer be expected.
  • the evaluation device is designed such that it outputs an alarm signal based on a measured value detected by the concentration sensor when this at least one measured value or a characteristic value derived from the measured value reaches a predetermined concentration limit.
  • the evaluation device it is possible for the evaluation device to output a switching or control signal, which can be detected by a control device and used to shut down the pump unit based on this signal in order to prevent further defects. Based on the alarm signal, it can be determined that the seals in the sealing arrangement need to be replaced.
  • the evaluation device is designed such that it forms at least one measured value from the measured value of the concentration sensor and one measured value detected by the at least one second sensor, i.e., a characteristic value derived from a temperature measured value.
  • a characteristic value can be a concentration measured value corrected for the temperature influence, i.e., a concentration measured value that has been corrected such that a temperature-dependent influence on the measurement result has been eliminated or reduced. Based on such a characteristic value, a decision can then be made regarding the condition of the liquid reservoir.
  • the characteristic value can be compared with a predetermined limit value for the concentration, and if this limit value is exceeded or undershot, an error signal can be output, signaling maintenance or repair of the seals.
  • the evaluation device can be designed such that the measured values of the concentration sensor are recorded at different times and an average of the recorded measured values is calculated as a characteristic value.
  • an average value By calculating the average value, short-term fluctuations, which may be due, for example, to changes in the operating state of the pump unit, can be minimized, and only long-term influences can be taken into account in order to determine changes in the fluid supply that may necessitate maintenance or repairs to the seals.
  • the evaluation device can be designed such that measured values, i.e. concentration measured values, which are recorded at a lower temperature are given a higher weighting when calculating the average value than measured values which are recorded at a higher temperature.
  • measured values i.e. concentration measured values
  • concentration measured values which are recorded at a lower temperature are given a higher weighting when calculating the average value than measured values which are recorded at a higher temperature.
  • This is done, for example, according to a linear function or an inverse sigmoid function.
  • other mathematical functions can also be used to achieve this.
  • monotonically decreasing functions can be used in certain temperature intervals, such as the previously mentioned linear functions and inverse sigmoid function.
  • monotonically increasing functions in certain temperature ranges, in particular at very low temperatures which are close to the freezing point.
  • a monotonically decreasing function can preferably be used in a higher temperature range and a monotonically increasing function in a lower temperature range.
  • the invention further relates to a method for detecting a concentration change in a liquid reservoir in a sealing arrangement in a pump unit, in which at least one measured value from a concentration sensor arranged on the liquid reservoir is evaluated as a function of the temperature or a temperature-dependent parameter of the liquid reservoir.
  • a temperature influence on the measurement result of a concentration sensor can be compensated.
  • the sealing arrangement 20 also has two seals 26 and 28, which are designed as shaft seals and through which the shaft 14 is passed in a sealing manner.
  • the seal 26 forms a first seal, which faces the pump housing 4, while the seal 28 forms a second seal, which faces the drive motor 2.
  • the liquid reservoir 22 is located between the first seal 26 and the second seal 28. If the first seal 26 should fail, liquid from the pump housing 4 will penetrate into the interior of the liquid reservoir 22, which can be detected. As expected, the first seal 26 will wear out sooner than the second seal 28, whereby the seal wear can be detected before liquid from the liquid reservoir 22 penetrates into the interior of the drive motor 2.
  • the structure of the liquid reservoir 22 will be described in more detail below with reference to Fig. 3 described.
  • the liquid reservoir 22 can preferably be filled with a liquid mixture containing oil or glycol, in particular with a glycol-water mixture filled. In addition to glycol and water, the mixture can contain other additives.
  • a concentration sensor 30 which is inserted into the seal housing 24 of the seal arrangement 20.
  • the concentration sensor 30 extends into the interior of the chamber in which the liquid reservoir 22 is located.
  • a second sensor 32 is arranged on the seal housing 24, which in this case is designed as a temperature sensor.
  • the second sensor 32 can, however, also be designed as a combined sensor, which detects several parameters, for example temperature and pressure and/or vibrations.
  • a vibration sensor 33 can be integrated into the second sensor as a third sensor.
  • the vibration sensor 33 serves to detect whether the pump unit is in operation or not.
  • Both the concentration sensor 30 and the second sensor 32 are connected to an evaluation device 34.
  • the output signals of the vibration sensor 33 are also evaluated by the evaluation device 34 in order to, for example, suspend the evaluation of the other sensor in the event of excessive vibrations.
  • the evaluation device 34 can be part of a control or regulation electronics 36 inside the electronics housing 10 (see Fig. 2 ), which controls the drive motor 2.
  • the concentration sensor 30 is designed as an ultrasonic sensor, as can be seen from Fig. 4
  • the concentration sensor 30 has a transmitting/receiving unit 38, which transmits an ultrasonic signal into the interior of the liquid reservoir 22 toward an opposite wall 40. The signal is reflected at the wall 40 and sent back to the transmitting/receiving unit 38, where the signal is received again.
  • the transmitting/receiving unit 38 is connected to the evaluation device 34, which can detect the signal propagation time of the ultrasonic signal between the transmitting/receiving unit 38 and the wall 40.
  • the speed of sound in the liquid reservoir 22 changes depending on the concentration, so that changes in the concentration can be detected by the evaluation unit 34 from the propagation time and thus the speed of the signal in the liquid reservoir 22.
  • the transmitting/receiving unit 38 can, for example, be designed as a piezo element.
  • Fig. 5 Signal curves for the signal velocity within the liquid reservoir 22 are shown for four different concentrations conc0, concl, conc2 and conc3.
  • Fig. 5 the velocity u is plotted against temperature T. It can be seen that the velocity differences between the individual concentrations decrease with increasing temperature T. This means that the measurement accuracy of the concentration decreases with increasing temperature. Above a temperature limit value Tg, an accurate measurement is no longer possible. Therefore, the invention provides that the evaluation device 34 preferably suspends the evaluation of the measurement result of the concentration sensor 30 when the temperature Tg is exceeded.
  • a wastewater pump is generally not operated continuously but in intervals. During operation, the temperature rises.
  • the concentration measurement or evaluation of the measured value of the concentration sensor 30 is then carried out by the evaluation device 34 only for measurements at temperatures below the temperature limit value Tg.
  • the concentration determination in the liquid reservoir 22 can be carried out by the evaluation device 34, for example, based on Fig. 6 described manner.
  • a current concentration C i is detected by the concentration sensor 30 and a current temperature T i is detected by the temperature sensor 32.
  • a check is made as to whether the current temperature value T is below a limit value T thres (corresponds to T g ). If this is the case (Y), in step S2, a corrected concentration value C out is determined as a function of the measured concentration values C i , the measured temperature values T i and the time t i .
  • the concentration C out can be determined as a weighted average value of a large number of concentrations C i measured over a longer period of time, in particular as a running average.
  • the weighting can be time- and/or temperature-dependent.
  • the weighting is preferably carried out in such a way that measurements at low temperatures are given a higher weighting than measurements at higher temperatures. This can be done according to a linear function or else an inverse sigmoid function or other suitable mathematical function.
  • step S3 If it is determined in step S1 that the temperature T i is above the set temperature limit value T thres (N), a check is carried out in step S3 as to whether the period t since the last determination of a concentration value C out is less than a predetermined interval t intervall . If this is the case (Y), C out is set to the last determined value in step A1. If it is determined in step S3 that the time interval t is equal to or greater than the predetermined interval t intervall (N), the concentration value C out is set to the last determined value in step A2 and at the same time a warning message is issued that no current measurement or concentration determination is possible.
  • the determination of the concentration C out could be based on the temperature T i and the measured
  • the concentration measurement value C i can also be determined in other ways, for example, using a neural network. Such a neural network could adapt to changes in ambient and operating conditions and, in a learning manner, adjust the correction of the concentration measurement value C i depending on the temperature.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Claims (20)

  1. Groupe de pompage, doté d'un moteur d'entraînement (2) et d'au moins une roue reliée par l'intermédiaire d'un arbre (14) avec le moteur d'entraînement (2), l'arbre s'étendant entre le moteur d'entraînement (2) et la roue à travers au moins une structure d'étanchéité (20) avec réserve de liquide (22), la structure d'étanchéité (20) comportant au moins deux joints (26, 28), entre lesquels la réserve de liquide (22) est conçue sous la forme d'un compartiment rempli de liquide,
    caractérisé en ce que
    sur la réserve de liquide (22) sont placés au moins un capteur de concentration (30) sous la forme d'un capteur optique, destiné à détecter une variation de concentration dans la réserve de liquide (22) et au moins un deuxième capteur (32), destiné à détecter au moins un paramètre additionnel de la réserve de liquide (22), le deuxième capteur étant un capteur de température (32) ou un capteur, lequel détecte au moins un paramètre dépendant de la température,
    le capteur de concentration (30) et le deuxième capteur (2) sont connectés avec un dispositif d'évaluation (34) et en ce que
    le dispositif d'évaluation (34) est conçu de sorte à procéder à une évaluation d'au moins une valeur de mesure du capteur de concentration (30) sous considération d'au moins une valeur de mesure détectée par le deuxième capteur (32).
  2. Groupe de pompage selon la revendication 1, caractérisé en ce que le dispositif d'évaluation (34) est conçu de sorte à procéder à une évaluation d'une valeur de mesure du capteur de concentration (30) uniquement si la valeur de mesure de température détectée par l'au moins un deuxième capteur (32) se situe en-dessous d'une valeur limite maximale prédéfinie.
  3. Groupe de pompage selon la revendication 1 ou 2, caractérisé en ce que le dispositif d'évaluation (34) est conçu de sorte à procéder à une évaluation d'une valeur de mesure du capteur de concentration (30) uniquement si la valeur de mesure de température détectée par l'au moins un deuxième capteur (32) se situe au-delà d'une valeur limite maximale prédéfinie.
  4. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'évaluation (34) est conçu de sorte à se baser lors de la suspension d'une détection de valeur de mesure ou d'une évaluation de mesure sur la dernière valeur de mesure d'un autre traitement, détectée avant la suspension.
  5. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'évaluation (34) est conçu de sorte à délivrer un signal d'alerte sur la base d'une valeur de mesure détectée par le capteur de concentration (32) si ladite au moins une valeur de mesure ou une valeur caractéristique dérivée de la valeur de mesure atteint une valeur de concentration prédéfinie.
  6. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'évaluation (34) est conçu de sorte à créer au moins une valeur caractéristique dérivée de la valeur de mesure du capteur de concentration (30) et une valeur caractéristique dérivée de la valeur de mesure de température détectée par l'au moins un deuxième capteur (32).
  7. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'évaluation (34) est conçu de sorte à détecter à différents moments des valeurs de mesure du capteur de concentration (30) et à créer en tant que valeur caractéristique une valeur moyenne des valeurs de mesure détectées.
  8. Groupe de pompage selon la revendication 7, caractérisé en ce que le dispositif d'évaluation (34) est conçu de sorte à créer en tant que valeur caractéristique une valeur moyenne courante ou une valeur moyenne sur une période déterminée.
  9. Groupe de pompage selon la revendication 7 ou 8, caractérisé en ce que le dispositif d'évaluation (34) est conçu de sorte à pondérer les valeurs de mesure du capteur de concentration (30) lors de la création de la valeur moyenne en fonction des valeurs de mesure détectées par le deuxième capteur (32) et de préférence, en fonction des valeurs de mesure de température détectées par l'au moins un capteur (32) et / ou en fonction du temps.
  10. Groupe de pompage selon la revendication 9, caractérisé en ce que le dispositif d'évaluation (34) est conçu de sorte que, lors de la création de la valeur moyenne, un poids plus important soit attribué aux valeurs de mesure, lesquelles sont détectées à une basse température qu'à des valeurs de mesure, lesquelles sont détectées à une température plus élevée, ceci s'effectuant de préférence selon une fonction linéaire ou une fonction sigmoïde inversée.
  11. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'évaluation (34) comporte un réseau neuronal pour l'évaluation de l'au moins une valeur de mesure.
  12. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé en ce que le capteur de concentration (30) et l'au moins un deuxième capteur (32) sont intégrés dans un module de capteurs.
  13. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé par au moins un troisième capteur (33), lequel est conçu pour détecter un état de service du groupe de pompage.
  14. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé en ce que la réserve de liquide (22) est remplie d'un mélange de liquides contenant de l'huile ou du glycol.
  15. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé en ce que le capteur de concentration (30) et le dispositif d'évaluation (34) sont conçus pour détecter la concentration d'eau dans la réserve de liquide.
  16. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé en ce que le groupe de pompage est un groupe de pompage d'eaux usées.
  17. Groupe de pompage selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'évaluation (34) est conçu de sorte à calculer sur la base de l'évaluation des valeurs de mesure du capteur de concentration (30) une période jusqu'à la prochaine maintenance requise du groupe de pompage.
  18. Procédé, destiné à détecter une variation de concentration dans une réserve de liquide (22) dans une structure d'étanchéité (20) dans un groupe de pompage, laquelle comporte au moins deux joints (26, 28), entre lesquels la réserve de liquide (22) est conçue sous la forme d'un compartiment rempli de liquide, lors duquel procédé, au moins une valeur de mesure d'un capteur de concentration (30) placé sur la réserve de liquide (22) sous la forme d'un capteur optique est évaluée en fonction de la température ou d'un paramètre dépendant de la température de la réserve de liquide (22).
  19. Procédé selon la revendication 18, caractérisé en ce que l'évaluation de l'au moins une valeur de mesure est suspendue lorsque la température se situe au-delà d'une valeur limite supérieure ou en-dessous d'une valeur limite inférieure
  20. Procédé selon la revendication 18 ou 19, caractérisé en ce que lors de l'évaluation, une valeur moyenne est créée à partir d'une pluralité de valeurs de mesure du capteur de concentration (30), les valeurs de mesure individuelles étant pondérées différemment en fonction d'un paramètre additionnel et de préférence en fonction de la température respectivement détectée et / ou en fonction du temps.
EP18163562.4A 2018-03-23 2018-03-23 Groupe pompe ainsi que procédé de surveillance d'alimentation en liquide dans un dispositif d'étanchéité dans un groupe pompe Active EP3543537B2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18163562.4A EP3543537B2 (fr) 2018-03-23 2018-03-23 Groupe pompe ainsi que procédé de surveillance d'alimentation en liquide dans un dispositif d'étanchéité dans un groupe pompe
US16/361,525 US11143190B2 (en) 2018-03-23 2019-03-22 Pump assembly having an impeller, a motor, and a shaft, with the shaft passing from the motor to the impeller through a fluid reservoir and a seal arrangemnet with a tration
CN201910227128.4A CN110296099B (zh) 2018-03-23 2019-03-25 泵机组以及用于监视泵机组中的密封结构中的液体部的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18163562.4A EP3543537B2 (fr) 2018-03-23 2018-03-23 Groupe pompe ainsi que procédé de surveillance d'alimentation en liquide dans un dispositif d'étanchéité dans un groupe pompe

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EP3543537A1 EP3543537A1 (fr) 2019-09-25
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CN113250990B (zh) * 2021-07-14 2021-10-08 亿昇(天津)科技有限公司 一种压缩机检测装置、压缩机及检测方法
DE102021211874B4 (de) 2021-10-21 2024-07-11 Vitesco Technologies GmbH Verfahren und Vorrichtung zur Detektion einer zu erwartenden Eisbildung innerhalb eines Waschsystems eines Fahrzeugs

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US3370542A (en) * 1965-10-21 1968-02-27 Dresser Ind Temperature detection device
US4264452A (en) * 1978-09-22 1981-04-28 E. I. Du Pont De Nemours And Company Pump seal flush
US5173019A (en) * 1991-08-05 1992-12-22 American Gage And Machine Company Pump including secondary containment with alarm system
US5494299A (en) * 1994-02-22 1996-02-27 Evironamics Corporation Temperature and pressure resistant rotating seal construction for a pump
US5746435A (en) * 1994-09-30 1998-05-05 Arbuckle; Donald P. Dual seal barrier fluid leakage control method
DK172996B1 (da) * 1997-05-27 1999-11-01 Apv Fluid Handling Horsens As Centrifugalpumpe med akseltætning
US6626436B2 (en) * 1997-08-20 2003-09-30 Crane John Inc Monitoring seal system
US6379127B1 (en) 2000-09-29 2002-04-30 Lawrence Pumps, Inc. Submersible motor with shaft seals
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US9321026B2 (en) * 2012-10-31 2016-04-26 Chevron Phillips Chemical Company Lp System and method for seal flush
WO2014179160A1 (fr) * 2013-04-29 2014-11-06 Schlumberger Canada Limited Système capteur de proximité pour pompes submersibles électriques
CN205207212U (zh) * 2015-12-03 2016-05-04 中广核研究院有限公司 一种反应堆冷却剂泵轴封泄露流量保护控制装置
ITUA20164654A1 (it) * 2016-06-24 2017-12-24 Caprari Spa Elettropompa

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CN110296099A (zh) 2019-10-01
US20190293073A1 (en) 2019-09-26
US11143190B2 (en) 2021-10-12
CN110296099B (zh) 2020-12-11
EP3543537A1 (fr) 2019-09-25
EP3543537B1 (fr) 2022-01-05

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