EP1880090B1 - Vorrichtung zum reinigen von gas beim entlüften eines kurbelgehäuses - Google Patents

Vorrichtung zum reinigen von gas beim entlüften eines kurbelgehäuses Download PDF

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Publication number
EP1880090B1
EP1880090B1 EP06724681.9A EP06724681A EP1880090B1 EP 1880090 B1 EP1880090 B1 EP 1880090B1 EP 06724681 A EP06724681 A EP 06724681A EP 1880090 B1 EP1880090 B1 EP 1880090B1
Authority
EP
European Patent Office
Prior art keywords
chamber
housing
driving
rotor shaft
oil
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
EP06724681.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1880090A1 (de
Inventor
Serge Kup
Mats-Örjan POGEN
Ingvar HÄLLGREN
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.)
Alfa Laval Corporate AB
Original Assignee
Alfa Laval Corporate AB
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
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Application filed by Alfa Laval Corporate AB filed Critical Alfa Laval Corporate AB
Publication of EP1880090A1 publication Critical patent/EP1880090A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/005—Centrifugal separators or filters for fluid circulation systems, e.g. for lubricant oil circulation systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
    • B04B9/06—Fluid drive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B5/00—Other centrifuges
    • B04B5/12—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers
    • B04B2005/125—Centrifuges in which rotors other than bowls generate centrifugal effects in stationary containers the rotors comprising separating walls
    • 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
    • F01M2013/0422—Separating oil and gas with a centrifuge device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/19—Crankcase ventilation

Definitions

  • the present invention relates to an apparatus for purifying gas in venting a crankcase, comprising a housing in which a deposition chamber is provided, a rotor assembly having a rotor shaft rotatably supported in the housing and a centrifugal rotor disposed in the deposition chamber and a fluidic drive means for driving the Rotor shaft by means of a drive fluid, wherein the drive means is arranged in a drive chamber which is separated by a housing separating wall of the separator chamber, wherein the rotor shaft extends through an opening in the housing partition and wherein in the region of the opening in the housing partition a labyrinth seal for sealing the Drive chamber is provided by the separator chamber.
  • Such a device is known from the prior art. This is how the document shows WO 2004/091799 A1 a corresponding device, are deposited with the oil particles of a coming of an internal combustion engine oil-air mixture by means of a centrifugal rotor.
  • the centrifugal rotor has a group of stacked, frusto-conical separator plates, which are arranged at regular intervals on the rotor shaft and non-rotatably coupled thereto. In their central area, the separator plates are provided with mutually aligned openings. Between the Abscheiderblechen conically extending outflow areas form, which open into a radially outer region of the Abscheiderhunt.
  • the rotor shaft and thus the centrifugal rotor are driven by a turbine wheel, which is arranged in the drive chamber and there is acted upon in operation with an oil jet. Due to the rotational movement of the centrifugal rotor and introduced in the central region of the engine oil-gas mixture is set in rotation and conveyed radially outward. It flows through the conical outflow areas. In this case, oil particles contained in the oil-gas mixture are deposited on the separator plates. Further, by the resulting in the central region of the centrifugal rotor Vacuum further oil-gas mixture sucked by the internal combustion engine.
  • the deposited on the Abscheiderblechen oil is also promoted because of their rotational movement and the resulting centrifugal forces radially outward and finally hurled from the radially outer edge of the Abscheiderbleche to the separator chamber limiting housing wall. From this, the separated oil flows due to gravity down into a collection channel and is returned via an outlet opening to the oil circuit of the engine.
  • a sealing ring for a centrifugal separator is off US 6,676,131 known. This has advantages in terms of installation and a good fixation in a groove receiving the sealing ring.
  • the drive chamber is accommodated in the lower chamber and separated from the flowing into the lower chamber of the oil-gas mixture.
  • the gap between the partition wall and the facing end wall of the separator must not be too large.
  • a labyrinth seal may be provided at this point, but this is not necessary and not desirable for a needs-based dimensioning of the intermediate gap between partition and facing end wall of the separation device, since the supply of the oil-gas mixture can be hindered.
  • a bearing bush of the housing partition has a pipe socket which projects to the drive chamber and serves to realize the labyrinth seal.
  • a bearing in particular a ball bearing, is accommodated for supporting the rotor shaft in the bearing bush of the housing partition wall.
  • the bearing bush is integrated in the housing partition.
  • the pipe socket is used advantageously for the realization of the labyrinth seal.
  • the labyrinth seal has a sealing disc with a circumferential axial groove and that a free end of the pipe socket in the axial groove, preferably non-contact, engages.
  • the sealing disc is rotationally coupled to the rotor shaft.
  • the labyrinth seal is thus formed in this embodiment of the invention between the housing-fixed pipe socket and the rotating rotor shaft. The invention thus avoids sealing parts that rotate with one another in operation with a contact seal that is prone to wear.
  • the drive device has a drive wheel which can be driven fluidly, preferably a fluidically impinged turbine wheel, which is mounted in a rotationally fixed manner on the rotor shaft and coupled to the sealing disk.
  • the sealing washer between the drive wheel and bearing is arranged.
  • the sealing disc has a radial region of greater thickness, which contacts an inner ring of the bearing. As a result, the sealing disc can be used at the same time for bracing the bearing.
  • the invention further relates to a sealing arrangement in a device of the type described above, comprising a labyrinth seal which seals non-contact the separator chamber of the drive chamber.
  • a centrifugal separating device is shown in a section containing the longitudinal axis A and generally designated 10.
  • the separator 10 includes a housing 12 enclosing a separator chamber 14.
  • the housing 12 is formed open at the bottom and closed by a bottom-side housing partition 16.
  • the housing is provided with an inlet nozzle 18, which defines an inlet 20 opening into the separator chamber 14.
  • the housing 12 further has an outlet, not shown.
  • the housing 12 holding webs 22 and 24 which receive a bearing cup 26 and hold in the housing 12.
  • the bearing cup 26 is stepped and includes apertures 28 such that the inlet 20 is fluidly connected to the separator chamber 14.
  • a ball bearing 30 is rotatably received with its outer ring.
  • the inner ring of the ball bearing 30 is pressed onto a rotor shaft 32.
  • the rotor shaft 32 is also mounted via a further ball bearing 34 in the housing partition 16.
  • the housing partition 16 has a central opening which is surrounded by an integrally formed tubular extension 36.
  • the ball bearing 34 is pressed with its outer ring in the inner peripheral surface of the pipe socket 36 and is held at the lower end by a diameter constriction on the neck 36.
  • the inner ring of the ball bearing 34 sits on the rotor shaft 32nd
  • a plurality of frustoconical Abscheiderbleche 38 are arranged at regular intervals and rotatably mounted on the rotor shaft 32.
  • the separator plates 38 also have openings 40 in their horizontally extending central area. The rotor shaft 32 and the separator plates 38 together form a centrifugal rotor 39.
  • a bottom part 42 is further arranged with a collecting channel 44 integrally formed therein.
  • the collecting channel 44 is bounded radially on the inside by a circumferential channel wall 46 formed on the funnel bottom 42.
  • an oil sump 48 is formed between the bottom part 42 and the housing partition wall 16 so an oil sump 48 is formed.
  • the collecting duct 44 is connected to the oil collecting basin 48 via bottom-side drainage slots 50, which are distributed uniformly in the circumferential direction.
  • a discharge opening 52 is provided for oil discharge.
  • a drive chamber 60 is arranged below the housing partition wall 16, which is only partially shown.
  • the rotor shaft 16 extends through the tube extension 36 in the drive chamber 60.
  • a drive wheel designed as a turbine wheel 64 is mounted rotationally fixed.
  • the turbine wheel 64 has at its upper end turbine blades 66, which via an in Fig. 1 and 2 No nozzle can be acted upon with an oil jet, so that the oil impinging on the turbine blades 66, the turbine wheel 64 and thus the rotor shaft 16 together with the separator plates attached thereto 38 in rotation about the axis A. Details of the arrangement in the region of the lower ball bearing 34 also go out Fig. 2 out.
  • a sealing washer 70 made of steel or another dimensionally stable material is used.
  • the sealing washer 70 is in a single part illustration in Fig. 3 shown. It has a central opening 72, which is bordered by a raised radial area 74. The raised radial region 74 serves to rest on the inner ring of the ball bearing 36.
  • the underside of the sealing disc 70 is essentially planar. Furthermore, the sealing disc 70 has a circumferential groove 76 whose width B exceeds the wall thickness b of the lower free end of the tube extension 36.
  • the lower free end of the pipe socket 36 protrudes contactlessly into the groove 76, so that a labyrinthine gap between the lower free end of the pipe socket 36 and the groove 76 is formed.
  • the gap width is, for example, in the range of 0.01 mm to 0.20 mm.
  • the turbine blades 66 of the turbine wheel 64 are under pressure with a fluid, preferably engine oil, so that the turbine wheel 64 is rotated and drives the rotor shaft 32.
  • the separator plates 38 rotate with the rotor shaft 32. They set the air in the central region of the centrifugal rotor 39 consisting of the rotor shaft 32 and separator plates 38 to rotate, so that it flows outwards due to the centrifugal action. This results in a negative pressure in the central region and an intake effect (see arrow P), so that an oil-air mixture is sucked in via the inlet port 18 from a crankcase of an internal combustion engine.
  • the oil-air mixture contains oil particles that are to be separated from the air.
  • the oil-air mixture passes through the openings 28 to the separator plates 38 and is rotated there. Part of the oil-air mixture flows through the apertures 40 down, the other part of the oil-air mixture moves due to centrifugal force radially outward and impinges on the conical regions of Abscheiderbleche 38. In this case, the divide in the oil-air Mixed oil droplets from the air and stick to the separator plates. The separated oil is conveyed by the centrifugal force on the Abscheiderblechen 38 radially outwardly and finally thrown off at the radially outer edge, as in Fig. 1 shown at 54. On the side wall 56 of the housing, an oil film 58 is formed which, due to gravity, flows downwards and collects in the collecting duct 44.
  • the separated oil can flow via the drainage slots 50 into the fluid collection basin 48 and be led back into the oil circuit of the engine.
  • the purified air separated from the oil particles flows out of the separator chamber 14 via the outlet, not shown, and can be discharged to the atmosphere.
  • the sealing washer 70 is provided for the formation of the labyrinth seal. It has been found that the inventive use of the sealing disc 70 with the groove 76 and a resulting non-contact labyrinth seal has significant advantages over contacting seals, such as in the WO 2004/091799 A1 shown. On the one hand, contact seals are subject to ever-increasing wear as the operating time increases, which can even lead to seal failure.
  • Labyrinth seal according to the invention without contact and is therefore not subject to any friction due to wear. Furthermore, in certain operating situations, in particular in a high-performance operation of the internal combustion engine, relatively high pressures or pressure peaks may occur in the separator chamber, which must be reduced in the short term. In this case, a pressure reduction via the drain slots 50 and the discharge opening 52 is to be avoided, because otherwise the oil drainage process would be interrupted and under certain circumstances too much oil would remain in the separator chamber 14. This would result in a deterioration of the separator effect.
  • the invention now offers the advantage that a pressure reduction to the drive chamber 60 can take place via the labyrinth seal between the sealing washer 70 and the tube extension 36. Nevertheless, the labyrinth seal ensures a sufficiently good sealing of the separator chamber 14 from the drive chamber 60, so that in the drive chamber 60 existing oil droplets can not enter the separator chamber 14.

Landscapes

  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Centrifugal Separators (AREA)
EP06724681.9A 2005-05-09 2006-05-02 Vorrichtung zum reinigen von gas beim entlüften eines kurbelgehäuses Active EP1880090B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005021278A DE102005021278B4 (de) 2005-05-09 2005-05-09 Vorrichtung zum Reinigen von Gas beim Entlüften eines Kurbelgehäuses
PCT/EP2006/004098 WO2006119890A1 (de) 2005-05-09 2006-05-02 Vorrichtung zum reinigen von gas beim entlüften eines kurbelgehäuses

Publications (2)

Publication Number Publication Date
EP1880090A1 EP1880090A1 (de) 2008-01-23
EP1880090B1 true EP1880090B1 (de) 2013-11-20

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ID=36602948

Family Applications (1)

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EP06724681.9A Active EP1880090B1 (de) 2005-05-09 2006-05-02 Vorrichtung zum reinigen von gas beim entlüften eines kurbelgehäuses

Country Status (7)

Country Link
US (1) US8172917B2 (enrdf_load_stackoverflow)
EP (1) EP1880090B1 (enrdf_load_stackoverflow)
JP (1) JP2008540908A (enrdf_load_stackoverflow)
CN (1) CN101189414B (enrdf_load_stackoverflow)
DE (1) DE102005021278B4 (enrdf_load_stackoverflow)
RU (1) RU2405945C2 (enrdf_load_stackoverflow)
WO (1) WO2006119890A1 (enrdf_load_stackoverflow)

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Also Published As

Publication number Publication date
DE102005021278B4 (de) 2010-04-15
US8172917B2 (en) 2012-05-08
CN101189414A (zh) 2008-05-28
WO2006119890A1 (de) 2006-11-16
RU2007145512A (ru) 2009-06-20
US20080256912A1 (en) 2008-10-23
CN101189414B (zh) 2010-05-19
DE102005021278A1 (de) 2006-11-16
EP1880090A1 (de) 2008-01-23
RU2405945C2 (ru) 2010-12-10
JP2008540908A (ja) 2008-11-20

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