EP3748139A1 - Dispositif de séparation - Google Patents

Dispositif de séparation Download PDF

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Publication number
EP3748139A1
EP3748139A1 EP20163715.4A EP20163715A EP3748139A1 EP 3748139 A1 EP3748139 A1 EP 3748139A1 EP 20163715 A EP20163715 A EP 20163715A EP 3748139 A1 EP3748139 A1 EP 3748139A1
Authority
EP
European Patent Office
Prior art keywords
bypass line
separation device
supply system
fluid
supply
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.)
Granted
Application number
EP20163715.4A
Other languages
German (de)
English (en)
Other versions
EP3748139B1 (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 EP3748139B1 publication Critical patent/EP3748139B1/fr
Publication of EP3748139C0 publication Critical patent/EP3748139C0/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 separation device, in particular for separating oil aerosols from a fluid, such as an air stream, with a supply system and a take-off system connected to it via piping, which has a bypass line between a supply side and a discharge side for cleaned or contaminated fluid .
  • Separation devices of this type are state-of-the-art and are used in various technical fields of oil aerosols, technically oil mists, from media such as air. Fine oil mists form, for example, in the bearings of turbines such as gas-steam or hydraulic turbines.
  • a particularly widespread and important area of application is the use for crankcase ventilation of reciprocating internal combustion engines, compare this "Lexikon Motorentechnik", The internal combustion engine from A to Z, Richard van Basschuysen / Fred Schfer, Verlag Vieweg, pages 485, 486.
  • Reciprocating piston engines release blow-by gases from the combustion chamber via the area between the piston and piston rings and the cylinder into the crankcase and form in the Crankcase the oil mist as a blow-by mixture.
  • the oil mist is discharged via a crankcase ventilation system and the crankcase is vented so that there is almost no overpressure in the crankcase. Due to the harmful components of the oil mist, which in addition to unburned fuel components contains emissions from the exhaust system, and the resulting legal regulations, the untreated release into the environment is prohibited.
  • the blow-by mixture discharged from the crankcase is therefore cleaned off by means of a separation device before it is released to the environment as a virtually unpolluted air flow and / or fed back as supply air to a relevant component of the engine, for example the turbocharger.
  • the device has a sensor for detecting the gas pressure in the crankcase, the pressure measured values of which are transmitted to a control device.
  • the control device controls a shut-off valve as a function of the measured pressure values, which is connected upstream of a centrifugal separator and which regulates the volume flow of the gas discharged from the crankcase 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, the control unit depending on the im
  • the pressure values measured by the crankcase also controls the drive of the rotor of the centrifugal separator, the speed of which changes the suction power of the centrifugal separator.
  • a device of the type mentioned at the beginning is state of the art, which has a supply system with associated piping.
  • the contaminated blow-by gases, which are discharged from a crankcase, reach the inlet side of the supply system via the discharge side of the piping.
  • the blower generates a volume flow for the gas flow discharged from the crankcase via the piping discharge side, which reaches a take-off system as a gas flow cleaned by the filter / separator via the piping supply side, through which the pressure in the crankcase is reduced to a desired low lower or lower level Overpressure is maintained.
  • the piping discharge side is connected to the piping supply side via a bypass line.
  • the object of the invention is to provide a separation device of the type mentioned at the beginning, which is characterized by particularly advantageous operating behavior.
  • this object is achieved by a separation device which has the features of claim 1 in its entirety.
  • 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 device, no or essentially no contaminated fluid is bypassed from the supply system via the bypass line from the discharge side to the supply side and thus reaches the acceptance system.
  • operating states of the associated system for example extreme load states of the reciprocating piston engine, can occur in which, despite the supply system in operation, untreated gas reaches the discharge side of the piping and thus the removal system via the bypass line.
  • the fan power and thus the filter / separating power can be adapted to the operating conditions of the associated system, such as a reciprocating piston engine, in such a way that only in the event of failure of the supply system is a weight the falling amount reaches the discharge side and the collection system via the bypass line.
  • This advantageously ensures reliable cleaning of contaminated 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 fan, preferably in the form of a side channel compressor, which, viewed in the direction of flow of the fluid, is preceded by a preferably filtering separator, the control device preferably A frequency converter acts on the electric motor of the conveyor.
  • a motor preferably an electric motor, such as a fan, preferably in the form of a side channel compressor, which, viewed in the direction of flow of the fluid, is preceded by a preferably filtering separator
  • the control device preferably A frequency converter acts on the electric motor of the conveyor.
  • the arrangement can advantageously be such that the control device is connected to an output of a data acquisition device, which is connected with its respective input to at least one actual and setpoint specification and to the frequency converter.
  • the data acquisition device adapts the respective acquired actual value by activating the frequency converter by means of the control device.
  • the volume flow generated by the fan can be adjusted to a size at which the pressure in the connected crankcase is kept at the desired value.
  • a differential pressure meter can be connected between the input and the output of the separator and in parallel to it, which forwards 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 thereby be achieved.
  • the acceptance system can particularly advantageously have a crankcase of a preferably turbo-charged 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 consist of a pipeline between the delivery side of the conveyor and the inlet of the crankcase and a further pipeline on the outlet side of the crankcase and the take-off 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 acquisition can be connected to an external pressure signal specification and / or to an internal pressure signal specification which is connected to the discharge side of the acceptance system.
  • the external pressure signal specification can be generated, for example, on the basis of the load state of the internal combustion engine or as an internal pressure signal specification by a pressure sensor which 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, which is located in the bypass line and / or several times in the one pipeline, seen in the fluid direction, in front of and behind the branch with the bypass line.
  • the volume flow measuring device located in the bypass line the actual value can advantageously be selected such that the volume flow in the bypass line approaches zero.
  • the speed of the blower can be adjusted so that the flow in the piping supply side is the same in front of and behind the branch of the bypass line or is greater than in the branch in front of the branch Line part leading from the branch to the acceptance system.
  • a further internal pressure signal specification can be connected, which decreases the fluid pressure in the bypass line. Based on the pressure value, the speed of the fan can be adjusted so that no volume flow reaches the bypass line from the piping 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, as well as in the one pipeline before the branch with the bypass line. If the actual value is sent as a signal from two temperature sensors, one of which detects the temperature in the bypass line and the other of which detects the temperature in the supply piping, the actual value can advantageously be adapted to the setpoint value in such a way that the speed of the fan is controlled so that the temperature in the bypass line always corresponds to the temperature of the piping supply side, upstream of the branch with the bypass line.
  • the invention also relates to a separation device, in particular for separating oil aerosols from a fluid, such as an air stream, for a separation device according to one of claims 1 to 10, which has the features of claim 11.
  • the separation device which as an oil mist separator is provided for cleaning blow-by gases that are discharged from the crankcase during the crankcase ventilation of reciprocating internal combustion engines.
  • the separation device according to the invention can also advantageously be used for separating oil aerosols of other origins.
  • oil mist separators are an important part of lubrication systems on turbines, such as gas, steam or hydraulic turbines, in whose bearings a fine oil mist is formed from the lubricant.
  • the supply system 2 has in a line branch between the inlet 12 and the outlet 16, one after the other in the flow direction Filter / separator 22 and a suction fan 24.
  • This is formed by a side channel compressor driven by an electric motor 26.
  • the electric motor 26 is an alternating current motor, the speed of which can be controlled by means of a frequency converter 28.
  • the filter / separator 22 is a filter having a coalescence element in which larger droplets are formed from the oil mist and run down to a collecting container 30.
  • a coalescence filter for example of the Hydac Optimicron® Drain type, can be used as the filter / separator 22.
  • a data acquisition device 32 receives a setpoint value 34 for the size of the volume flow generated by the fan 24 as input.
  • the data acquisition device 32 receives the actual value 36 of the volume flow as an input and the differential pressure 38, which is measured by a pressure sensor 40 between the dirty side and the clean side of the filter / separator 22, as a further input.
  • a control device connected to the data acquisition device 32 controls 42 the speed of the fan 24 via the frequency converter 28, so that it generates the volume flow corresponding to the setpoint value 34.
  • the piping In order to prevent dangerous overpressure from building up in the crankcase of the connected internal combustion engine 10 in the event of a failure in the delivery rate 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 due to reduced output of the fan 24 Blow-through gases reach the piping supply side 14 via the bypass line 44 and escape via the outlet 20 or reach the internal combustion engine 10 as supply air polluted with oil and exhaust emissions and thereby endanger 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 fan 24, the delivery rate is adapted to the respective target values of the respective operating states. This ensures that in all operating states, apart from a complete failure of the supply system 2, no or almost no contaminated blow-through gas escapes via the bypass line 44.
  • the in Fig. 2 For this purpose, the actual value 36 shown in the first exemplary embodiment of the invention is fed in as an external signal which is generated by a pressure signal transmitter 45 by means of detecting the pressure prevailing in the crankcase.
  • the size of the conveyed volume flow can be adapted to the required value 34 in the various operating states, so that only if the supply system 2 fails completely, blow-through gas flows out unfiltered via the bypass line 44.
  • the components of the piping 6, 14, the supply system 2 and the acceptance system 4 are the same as in the case of FIG Fig. 1 explained known solution. A new description of these components is therefore unnecessary.
  • FIG. 13 shows a second embodiment similar to the embodiment of FIG Fig. 2 corresponds, apart from the fact that the actual signal 36 representing the respective operating state is not fed in from the external pressure signal transmitter 45, but rather 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.
  • the Fig. 4 shows a third exemplary embodiment in which the actual value 36 is generated as a signal from a volume flow sensor 52 which is inserted into the bypass line 44.
  • the speed of the fan 24 is set so that the volume flow in the bypass line 44 approaches zero.
  • the volume flow can be measured using measuring orifices or thermal sensors.
  • the Fig. 5 shows a fourth embodiment in which the actual value 36 is detected as a signal from two volume flow sensors 54 and 56.
  • the speed of the fan 24 is set so that the volume flow in the piping supply side 14 upstream and downstream of the branch 48 is the same.
  • the Fig. 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 sensor or a paddle flow monitor can be used for this.
  • the Fig. 7 illustrates a sixth embodiment.
  • the actual value 36 is recorded as a signal by 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 casing supply side 14.
  • Surface temperature sensors or temperature sensors that measure the temperature of the flow can be used as temperature sensors.
  • the components of the piping, the supply system 2 and the acceptance system 4 are in each case the same, 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)
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 true EP3748139A1 (fr) 2020-12-09
EP3748139B1 EP3748139B1 (fr) 2023-08-09
EP3748139C0 EP3748139C0 (fr) 2023-08-09

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EP20163715.4A Active EP3748139B1 (fr) 2019-06-04 2020-03-17 Dispositif de séparation

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EP (1) EP3748139B1 (fr)
DE (1) DE102019003952A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020100465A1 (en) * 2000-05-30 2002-08-01 Sieghard Pietschner Device to deoil the crankcase ventilation gases of an internal combustion engine
US20040112346A1 (en) * 2001-03-07 2004-06-17 Stephan Ahlborn Device for the ventilation of the crankcase of an internal combustion engine
US20050061305A1 (en) * 2001-11-13 2005-03-24 Sieghard Pietschner Device for crankcase ventilation of an internal combustion engine
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
DE102016209635A1 (de) * 2016-06-02 2017-12-07 Mahle International Gmbh Verfahren zum Betreiben einer Kurbelgehäuseentlüftungsanlage
DE102017207447A1 (de) * 2017-05-03 2018-11-08 Elringklinger Ag Bypassvorrichtung, Entlüftungsvorrichtung und Verfahren zum Abführen von Gas

Family Cites Families (2)

* 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
DE102018207925A1 (de) * 2018-05-18 2019-11-21 Elringklinger Ag Bypassvorrichtung, Entlüftungsvorrichtung und Verfahren zum Abführen von Gas

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020100465A1 (en) * 2000-05-30 2002-08-01 Sieghard Pietschner Device to deoil the crankcase ventilation gases of an internal combustion engine
US20040112346A1 (en) * 2001-03-07 2004-06-17 Stephan Ahlborn Device for the ventilation of the crankcase of an internal combustion engine
US20050061305A1 (en) * 2001-11-13 2005-03-24 Sieghard Pietschner Device for crankcase ventilation of an internal combustion engine
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
DE102016209635A1 (de) * 2016-06-02 2017-12-07 Mahle International Gmbh Verfahren zum Betreiben einer Kurbelgehäuseentlüftungsanlage
DE102017207447A1 (de) * 2017-05-03 2018-11-08 Elringklinger Ag Bypassvorrichtung, Entlüftungsvorrichtung und Verfahren zum Abführen von Gas

Also Published As

Publication number Publication date
EP3748139B1 (fr) 2023-08-09
DE102019003952A1 (de) 2020-12-10
EP3748139C0 (fr) 2023-08-09

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