EP3748139B1 - Dispositif de séparation - Google Patents

Dispositif de séparation Download PDF

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Publication number
EP3748139B1
EP3748139B1 EP20163715.4A EP20163715A EP3748139B1 EP 3748139 B1 EP3748139 B1 EP 3748139B1 EP 20163715 A EP20163715 A EP 20163715A EP 3748139 B1 EP3748139 B1 EP 3748139B1
Authority
EP
European Patent Office
Prior art keywords
bypass line
separation device
fluid
crankcase
pipe
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
EP20163715.4A
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German (de)
English (en)
Other versions
EP3748139A1 (fr
EP3748139C0 (fr
Inventor
Jan Weber
Andreas Grill
Ronny Sprauer
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.)
Hydac Filtertechnik GmbH
Original Assignee
Hydac Filtertechnik GmbH
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
Application filed by Hydac Filtertechnik GmbH filed Critical Hydac Filtertechnik GmbH
Publication of EP3748139A1 publication Critical patent/EP3748139A1/fr
Application granted granted Critical
Publication of EP3748139C0 publication Critical patent/EP3748139C0/fr
Publication of EP3748139B1 publication Critical patent/EP3748139B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M2013/0038—Layout of crankcase breathing systems
    • F01M2013/005—Layout of crankcase breathing systems having one or more deoilers
    • F01M2013/0055—Layout of crankcase breathing systems having one or more deoilers with a by-pass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M13/00—Crankcase ventilating or breathing
    • F01M13/02—Crankcase ventilating or breathing by means of additional source of positive or negative pressure
    • F01M13/021—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure
    • F01M2013/026—Crankcase ventilating or breathing by means of additional source of positive or negative pressure of negative pressure with pumps sucking air or blow-by gases from the crankcase

Definitions

  • the invention relates to a separating device, in particular for separating oil aerosols from a fluid, such as an air flow, with a supply system and a removal system connected to it via piping, which has a bypass line between a supply side and a discharge side for cleaned or contaminated fluid.
  • Separating devices of this type are state of the art and are used in various technical fields for oil aerosols, technically oil mist, from media such as air. Fine oil mist forms, for example, in the bearings of turbines, such as gas-steam or hydro turbines.
  • a particularly widespread and important area of application is the use for crankcase ventilation of reciprocating internal combustion engines, compare BASSCHUYSEN, Richard van (ed.); SCH ⁇ FER, Fred (ed.): Encyclopedia of engine technology - The internal combustion engine from A to Z, 2nd edition, Wiesbaden: Vieweg, 2006, pages 485, 486 .
  • blow-by gases When reciprocating engines are operated, blow-by gases (so-called blow-by gases) escape from the combustion chamber via the area between the piston and piston rings and the cylinder into the crankcase and form the oil mist as a blow-by mixture in the crankcase.
  • blow-by gases escape from the combustion chamber via the area between the piston and piston rings and the cylinder into the crankcase and form the oil mist as a blow-by mixture in the crankcase.
  • the oil mist is discharged via a crankcase vent and the crankcase is vented in such a way that there is almost no overpressure in the crankcase. Due to the harmful components of the oil mist, which, in addition to unburned fuel, also contains emissions from the exhaust system, and the resulting legal regulations, untreated release into the environment is prohibited.
  • the blow-by mixture discharged from the crankcase is therefore cleaned by means of a separating device before it is discharged to the environment as an almost unloaded air flow and/or fed back to a relevant component of the engine, for example the turbocharge
  • the device For detecting the gas pressure in the crankcase, the device has a sensor whose measured pressure values are transmitted to a control device. Using an actuator, the control device controls a shut-off valve, which is connected upstream of a centrifugal separator and which regulates the volume flow of the gas discharged from the crankcase, depending on the measured pressure values, in such a way that the gas pressure in the crankcase is at a predetermined pressure value or within a predetermined pressure value range is maintained during operation of the internal combustion engine.
  • the shut-off valve is arranged in a fluid path between the crankcase and the centrifugal separator, which sucks the gas out of the crankcase, with the control unit also controlling the drive of the rotor of the centrifugal separator in addition to the valve, depending on the pressure values measured in the crankcase the change in speed of which the suction power of the centrifugal separator can be regulated.
  • a device of the type mentioned at the outset is also prior art, which has a supply system with associated piping.
  • the loaded blow-by gases, which are discharged from a crankcase, reach the intake side of the supply system via the discharge side of the piping.
  • This has, as in the present 1 shown, an electric motor-driven suction fan and a filter / separator upstream of this.
  • the blower generates a volume flow for the gas flow discharged from the crankcase via the piping discharge side, which, as a gas flow cleaned by the filter/separator, reaches an extraction system via the piping supply side, through which the pressure in the crankcase is reduced to a desired low or low pressure overpressure is maintained.
  • the discharge side of the piping is connected to the supply side of the piping via a bypass line.
  • More separators go from the DE 10 2017 207 447 A1 , the U.S. 2005/0061305 A1 , the US 2002/0100465 A1 , the DE 10 2004 061 938 B3 , the U.S. 2004/0112346 A1 and the DE 10 2016 209 635 A1 out.
  • the object of the invention is to provide a separating device of the type mentioned at the outset, which is characterized by a particularly advantageous operating behavior.
  • an essential feature of the invention is that by means of a control device the supply system ensures that, except in the event of a failure of the supply system, no or essentially no contaminated fluid bypasses the supply system via the bypass line from the discharge side to the supply side and thus to the removal system.
  • operating states of the associated system for example extreme load states of the reciprocating engine, can occur in which, despite the supply system being in operation, untreated gas passes through the bypass line to the discharge side of the piping and thus to the removal system.
  • the blower output and thus the filter/separation output can be adapted to the operating states of the associated system, such as a reciprocating engine, in such a way that only in the event of a failure of the supply system does a falling quantity reaches the discharge side and the acceptance system via the bypass line.
  • This advantageously ensures operationally reliable cleaning of polluted fluids, such as oil mist originating from crankcase ventilation.
  • the supply system has a fluid delivery device that can be driven by a motor, preferably an electric motor, such as a blower, preferably in the form of a side channel compressor, which, seen in the flow direction of the fluid, is preceded by a preferably filtering separator, with the control device preferably via a frequency converter, acts on the electric motor of the conveyor.
  • a motor preferably an electric motor, such as a blower, preferably in the form of a side channel compressor, which, seen in the flow direction of the fluid, is preceded by a preferably filtering separator, with the control device preferably via a frequency converter, acts on the electric motor of the conveyor.
  • the arrangement can be such that the control device is connected to an output of a data acquisition device which, with its respective input, is connected to at least one actual and setpoint specification and connected to the frequency converter.
  • the data acquisition device adapts the respectively acquired actual value by activating the frequency converter using the control device.
  • the volume flow generated by the blower can be adjusted to a size at which the pressure in the connected crankcase is kept at the desired value.
  • a differential pressure gauge can be connected between the input and the output of the separator and parallel to it, which relays the actual value of the respectively determined differential pressure to a further input of the data acquisition device.
  • a particularly precise adjustment of the actual value can be achieved.
  • the removal system can particularly advantageously have a crankcase of a preferably turbocharged internal combustion engine.
  • the cleaned air can be fed back to the internal combustion engine as supply air, advantageously, for example, to the charge air inlet of a turbocharger.
  • the piping can advantageously consist of a pipeline between the discharge side of the conveying device and the inlet of the crankcase and of a further pipeline on the outlet side of the crankcase and the removal system, such as the inlet of the internal combustion engine, with one pipeline being the supply side and the other pipeline being the Has discharge side and the intermediate bypass line is part of the piping.
  • the actual value detection can be connected to an external pressure signal specification and/or to an internal pressure signal specification that is connected to the discharge side of the acceptance system is connected.
  • the external pressure signal specification can be generated, for example, based on the load condition of the internal combustion engine or as an internal pressure signal specification by a pressure sensor that is connected to the discharge side of the piping.
  • the actual value acquisition of the data acquisition device can be connected to a volume flow measuring device that is located in the bypass line and/or multiple times in the one pipeline, seen in the direction of the fluid, before and after the branch with the bypass line.
  • the actual value can advantageously be selected in such a way that the volume flow in the bypass line approaches zero.
  • the speed of the blower can be adjusted in such a way that the flow in the piping supply side before and after the branch of the bypass line is the same size or before the branch is greater than in the line section leading from the branch to the pick-up system.
  • a further internal pressure signal specification can be connected, which decreases the fluid pressure in the bypass line.
  • the speed of the blower can be adjusted based on the pressure value so that no volume flow reaches the bypass line from the pipework discharge side.
  • the actual value acquisition of the data acquisition device can be connected to a temperature signal specification, which preferably decreases the temperature in the bypass line and in one of the pipelines before the branch with the bypass line.
  • the actual value is detected as a signal by two temperature sensors, one of which detects the temperature in the bypass line and the other detects the temperature in the supply piping, the actual value can advantageously be adapted to the target value in such a way that the Fan speed is controlled so that the temperature in the Bypass line always corresponds to the temperature of the piping supply side, before the branch with the bypass line.
  • separating device which is provided as an oil mist separator for cleaning blow-by gases which are discharged from the crankcase during crankcase ventilation of reciprocating internal combustion engines.
  • the separating device according to the invention can also be used to advantage for separating oil aerosols from other origins.
  • oil mist separators are an important part of lubrication systems on turbines, such as gas, steam or hydro turbines, in whose bearings a fine oil mist is formed from the lubricant.
  • the supply system 2 has a filter/separator 22 and a suction fan 24 in a line branch between the inlet 12 and the outlet 16, one after the other in the direction of flow. This is formed by a side channel compressor driven by an electric motor 26 .
  • the electric motor 26 is an AC motor whose speed can be controlled by means of a frequency converter 28 .
  • the filter/separator 22 is a filter having a coalescing element in which larger droplets are formed from the oil mist which drain down to a collection container 30 .
  • a coalescing filter for example of the HYDAC Optimicron® Drain type, can be used as the filter/separator 22 .
  • a data acquisition device 32 is provided for operating control of the supply system 2 and receives a desired value 34 for the size of the volume flow generated by the blower 24 as input.
  • the data acquisition device 32 receives as an input the actual value 36 of the volume flow and as a further input the differential pressure 38 from a Pressure sensor 40 is measured between the dirty side and the clean side of the filter/separator 22.
  • a control device connected to the data acquisition device 32 controls 42 via the frequency converter 28 the speed of the blower 24, so that this generates the target value 34 corresponding volume flow.
  • the piping In order to prevent a dangerous overpressure from building up in the crankcase of the connected internal combustion engine 10 in the event of a failure of the delivery capacity of the supply system 2, the piping has a bypass line 44 between a branch point 46 on the piping discharge side 6 and a branch 48 on the piping supply side 14 on.
  • operating states can occur, for example extreme load states in which, despite the supply system 2 being in operation, unfiltered blow-by gases reach the piping supply side 14 via the bypass line 44 due to reduced output of the fan 24 and escape via the outlet 20 or as oil and exhaust gas emissions polluted intake air reach the internal combustion engine 10 and thereby cause a hazard to the environment and/or the function of the internal combustion engine 10.
  • the supply system 2 can be controlled by means of the control device 42 in such a way that in all operating states by controlling the speed of the blower 24 the delivery rate is adapted to the respective setpoint values of the respective operating states. This makes it possible to ensure that no or almost no contaminated blow-by gas escapes via the bypass line 44 in all operating states, apart from a complete failure of the supply system 2 .
  • the actual value 36 is fed in as an external signal for this purpose, which is generated by a pressure signal generator 45 by detecting the pressure prevailing in the crankcase.
  • the size of the conveyed volume flow can be adapted to the target value 34 required for the various operating states, so that blow-by gas only flows unfiltered via the bypass line 44 if the supply system 2 fails completely.
  • the components of the piping 6, 14, the supply system 2 and the removal system 4 are the same as in the case of the basis of FIG 1 explained known solution. A new description of these components is therefore not necessary.
  • the 3 shows a second embodiment, which is the embodiment of FIG 2 corresponds, apart from the fact that the actual signal 36 representing the respective operating state is not fed in by the external pressure signal generator 45, but by an internal pressure signal specification.
  • a pressure sensor 50 is connected to the piping supply side 14, preferably in the form of a piezo pressure sensor.
  • FIG. 12 shows a third exemplary embodiment in which the actual value 36 is generated as a signal by a volume flow sensor 52 that is inserted in the bypass line 44.
  • the speed of the blower 24 is set in such a way that the volume flow in the bypass line 44 approaches zero.
  • the volume flow can be measured using orifice plates or thermal sensors.
  • the figure 5 shows a fourth exemplary embodiment, in which the actual value 36 is recorded as a signal from two volume flow sensors 54 and 56 .
  • the speed of the blower 24 is adjusted in such a way that the volume flow in the piping supply side 14 before and after the branch 48 is the same.
  • the 6 shows a fifth embodiment.
  • the actual value 36 is recorded as a signal from a pressure sensor 58 on the bypass line 44 .
  • a piezo pressure transducer or a paddle flow monitor can be used for this.
  • the 7 illustrates a sixth embodiment.
  • the actual value 36 is recorded here as a signal from two temperature sensors 60 and 62 , of which the temperature sensor 60 measures the temperature in the bypass line 44 and the temperature sensor 62 measures the temperature in the piping supply side 14 .
  • the speed of the blower 24 is adjusted so that the temperature of the bypass line 44 always corresponds to the temperature of the piping supply side 14 .
  • Surface temperature sensors or temperature sensors which measure the temperature of the flow can be used as temperature sensors.
  • the components of the piping, the supply system 2 and the removal system 4 are the same in the exemplary embodiments, apart from the different device elements used to record the actual value 36 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Claims (10)

  1. Installation de séparation, en particulier pour séparer des aérosols-huile d'un fluide, comme d'un courant d'air, comprenant un système (2) d'alimentation et un système (4) de prélèvement, qui y est raccordé par une tuyauterie (6, 14), et qui a un conduit (44) de dérivation entre un côté (14) d'apport et un côté (6) d'évacuation du fluide épuré ou chargé, caractérisée en ce qu'au moyen d'un dispositif (42) de réglage, le système (2) d'alimentation assure, qu'à l'exception d'une défaillance du système (2) d'alimentation, pas de fluide chargé ou sensiblement pas de fluide chargé n'arrive, en contournant le système (2) d'alimentation par le conduit (44) de dérivation, du côté (6) d'évacuation au côté (14) d'apport du système (4) de prélèvement.
  2. Installation de séparation suivant la revendication 1, caractérisée en ce que le système (2) d'alimentation a un dispositif de transport de fluide pouvant être entraîné par un moteur, de préférence par un moteur (26) électrique, comme une soufflante (24), de préférence sous la forme d'un compresseur à conduit latéral en amont, considéré dans le sens du passage du fluide, duquel est monté un séparateur (22), de préférence filtrant, et en ce que le dispositif (42) de réglage agit, de préférence par un convertisseur (28) de fréquence, sur le moteur (26) électrique du dispositif (24) de transport.
  3. Installation de séparation suivant la revendication 2, caractérisée en ce que le dispositif (42) de réglage est raccordé à une sortie d'un dispositif (32) de saisie de données, qui est raccordé, par son entrée respective, à au moins une prescription de valeur réelle (36) et de valeur de consigne (34), ainsi qu'au convertisseur (28) de fréquence.
  4. Installation de séparation suivant la revendication 3, caractérisée en ce qu'entre l'entrée (12) et la sortie du séparateur (22) ainsi qu'en parallèle à celui-ci est monté un dispositif (40) de mesure de la pression différentielle, qui donne sur une autre entrée du dispositif (32) de saisie de données, la valeur réelle de la pression (38) différentielle déterminée respectivement.
  5. Installation de séparation suivant l'une des revendications précédentes, caractérisée en ce que le système (4) de prélèvement a un carter de manivelle d'un moteur (10) à combustion interne, de préférence suralimenté.
  6. Installation de séparation suivant la revendication 5, caractérisée en ce que la tuyauterie est constituée d'un conduit (14) tubulaire entre le côté (16) de sortie du dispositif (24) de transport et le système (4) de prélèvement, comme de l'entrée du moteur (10) à combustion, ainsi que d'un autre conduit (6) tubulaire du côté de sortie du carter de manivelle et de l'entrée (12) du séparateur (22), en ce que le un conduit (14) tubulaire a le côté d'apport et l'autre conduit (6) tubulaire, le côté d'évacuation, et en ce que le conduit (44) de dérivation intermédiaire fait parti de la tuyauterie.
  7. Installation de séparation suivant l'une des revendications 3 à 6, caractérisée en ce que la détection (36) de valeur réelle est raccordée à une prescription (45) extérieure de signal de pression et/ou à une prescription (50) interne de signal de pression, qui est raccordée au côté (6) d'évacuation du système (4) de prélèvement.
  8. Installation de séparation suivant l'une des revendications 3 à 7, caractérisée en ce que la détection (36) de valeur réelle du dispositif (32) de saisie de données est raccordé à un dispositif (52, 54, 56) de mesure du courant en volume, qui se trouve, considéré dans le sens du fluide, dans le conduit (44) de dérivation et/ou plusieurs fois dans le un conduit (14) tubulaire, avant et après la bifurcation (48) par le conduit (44) de dérivation.
  9. Installation de séparation suivant la revendication 7 ou 8, caractérisée en ce qu'il est raccordé une autre prescription (58) interne de signal de pression, qui prend la pression du fluide dans le conduit (44) de dérivation.
  10. Installation de séparation suivant l'une des revendications 3 à 9, caractérisée en ce que la détection (36) de valeur réelle du dispositif (32) de saisie de données est raccordée à une prescription (60, 62) de signal de température, qui prend de préférence la température dans le conduit (44) de dérivation, ainsi que dans le un conduit (14) tubulaire, avant la bifurcation (48) par le conduit (44) de dérivation.
EP20163715.4A 2019-06-04 2020-03-17 Dispositif de séparation Active EP3748139B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019003952.1A DE102019003952A1 (de) 2019-06-04 2019-06-04 Abscheidevorrichtung

Publications (3)

Publication Number Publication Date
EP3748139A1 EP3748139A1 (fr) 2020-12-09
EP3748139C0 EP3748139C0 (fr) 2023-08-09
EP3748139B1 true EP3748139B1 (fr) 2023-08-09

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DE (1) DE102019003952A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6123061A (en) * 1997-02-25 2000-09-26 Cummins Engine Company, Inc. Crankcase ventilation system
DE20009605U1 (de) * 2000-05-30 2001-10-18 Hengst Walter Gmbh & Co Kg Vorrichtung zur Entölung von Kurbelgehäuse-Entlüftungsgasen einer Brennkraftmaschine
EP1366272B1 (fr) * 2001-03-07 2006-05-10 Hengst GmbH & Co. KG Dispositif pour le degazage du carter-cylindres d'un moteur a combustion interne
DE20118388U1 (de) * 2001-11-13 2003-03-27 Hengst Gmbh & Co Kg Einrichtung für die Kurbelgehäuse-Entlüftung einer Brennkraftmaschine
DE102004061938B3 (de) * 2004-12-22 2006-06-29 Dichtungstechnik G. Bruss Gmbh & Co. Kg Ölabscheidesystem für eine Brennkraftmaschine
EP2431583A1 (fr) * 2010-09-15 2012-03-21 Alfa Laval Corporate AB Dispositif et procédé pour la purification de gaz de carter
DE102016209635B4 (de) * 2016-06-02 2024-04-25 Mahle International Gmbh Verfahren zum Betreiben einer Kurbelgehäuseentlüftungsanlage sowie nach diesem Verfahren betreibbare Brennkraftmaschine
DE102017207447A1 (de) * 2017-05-03 2018-11-08 Elringklinger Ag Bypassvorrichtung, Entlüftungsvorrichtung und Verfahren zum Abführen von Gas
DE102018207925A1 (de) * 2018-05-18 2019-11-21 Elringklinger Ag Bypassvorrichtung, Entlüftungsvorrichtung und Verfahren zum Abführen von Gas

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Publication number Publication date
EP3748139A1 (fr) 2020-12-09
EP3748139C0 (fr) 2023-08-09
DE102019003952A1 (de) 2020-12-10

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