EP1880085B2 - Dispositif centrifuge separateur de brouillard d'huile integre dans un arbre axialement creux d'un moteur a combustion interne - Google Patents

Dispositif centrifuge separateur de brouillard d'huile integre dans un arbre axialement creux d'un moteur a combustion interne Download PDF

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Publication number
EP1880085B2
EP1880085B2 EP06722839.5A EP06722839A EP1880085B2 EP 1880085 B2 EP1880085 B2 EP 1880085B2 EP 06722839 A EP06722839 A EP 06722839A EP 1880085 B2 EP1880085 B2 EP 1880085B2
Authority
EP
European Patent Office
Prior art keywords
oil mist
separator
housing
camshaft
tubular
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.)
Ceased
Application number
EP06722839.5A
Other languages
German (de)
English (en)
Other versions
EP1880085A1 (fr
EP1880085B1 (fr
Inventor
Klaus Beetz
Andreas Enderich
Hartmut Sauter
Torsten Schellhase
Jürgen Stehlig
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.)
Mahle International GmbH
Original Assignee
Mahle International 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37000109&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1880085(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE200510022254 external-priority patent/DE102005022254A1/de
Priority claimed from DE102005042725A external-priority patent/DE102005042725A1/de
Application filed by Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP1880085A1 publication Critical patent/EP1880085A1/fr
Publication of EP1880085B1 publication Critical patent/EP1880085B1/fr
Application granted granted Critical
Publication of EP1880085B2 publication Critical patent/EP1880085B2/fr
Ceased legal-status Critical Current
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
    • 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
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • 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

Definitions

  • the invention relates to a, in a centrifugal ⁇ lnebelabscheider founded according to the preamble of claim 1.
  • Oil mist is sucked by a pressure applied to the cavity of the camshaft vacuum through the radially inner, axial gap of the first annular channel.
  • a liquid fraction contained in the oil mist flows radially outwards due to centrifugal forces and leaves this annular channel through the drainage openings leading radially outward there.
  • a usually remaining proportion of the oil mist stream passes through the axial openings in the radially substantially closed wall of the first annular channel via the second annular channel in the cavity of the camshaft, from where this gas stream leaves the camshaft axially.
  • An oil separation within the axial cavity of the camshaft is not provided in that device.
  • Out JP 08-2 84 634 A is a hollow camshaft with an integrated oil mist separator known, in which the oil separation takes place within the cavity of the camshaft.
  • the oil mist stream enters the cavity through a swirl generator at one axial end of the camshaft and exits the camshaft at an opposite end. At this opposite end engages axially a dip tube into the interior of the cavity of the camshaft, to dissipate therefrom the gas stream remaining after separation of the liquid phase.
  • the liquid fraction separated from the oil mist stream also leaves the camshaft at this opposite end via an annular gap between the aforementioned dip tube and the inner wall of the camshaft cavity.
  • US 4,651,704 discloses a hollow camshaft in which oil separation occurs centrifugally within the camshaft cavity.
  • radial bores are provided over the length distributed.
  • liquid oil also leaves the camshaft cavity via radial bores, also with a distribution of these bores over the length of the camshaft.
  • the camshaft cavity is provided with a profiled inner circumferential surface such that those radial bores that lead oil mist radially inward, lie in inner wall areas with a smaller diameter than those radial bores, from which oil is discharged radially outward.
  • Out JP-01096410A is a hollow Rickenwelle with an integrated ⁇ lnchel-Abborger observed known, wherein at a first end with radial ⁇ hnebelzu technological openings for introduced into the axial Holraum the shaft oil mist and at the second end respectively for discharge with on the one hand a radial ⁇ labtechnischskanal for oil separated as a liquid phase and ante an axial Gesableitungs channel for attributable to the separated portion of liquid ⁇ lnebelstrom.
  • the invention is primarily concerned with the problem of improving the efficiency of a centrifugal oil mist separator integrated into an axially hollow cam shaft of an internal combustion engine over the prior art known heretofore.
  • the invention is based in this respect on the general idea, a centrifugal oil mist separator with an integration in a hollow shaft of a To provide internal combustion engine, in which a pre-separation is combined in a firmly connected to the shaft outer region with a final or final deposition within the wave cavity.
  • the pre-separator serves to separate the liquid oil fraction, which is present in relatively large oil droplets, while in the region of the final deposition, the fine oil mist droplets are deposited.
  • a swirl is imposed on the oil mist stream within the wave cavity by means of a swirl generator. By this twist, these fine oil droplets are particularly effective to settle radially outward to accumulate on the inner peripheral surface of the wave cavity.
  • a relatively long flow path downstream of the swirl generator is particularly advantageous.
  • the swirl generator is therefore located in an axial region of the wave cavity, which is relatively close to the ⁇ lnebeleintrittsbe I. Downstream of the swirl generator should be present a flow length which corresponds as possible to about ten times the value of the flow cross section in which the swirl generator is located within the wave cavity.
  • an axial force component sets up which promotes separated oil in the direction of the wide end of the conical jacket.
  • This conveying effect can be enhanced by a corresponding, screw conveyor-like design of the inner surface of the conical jacket.
  • the screw conveyor windings are to be aligned in such a way that a corresponding conveying effect can actually occur during a rotation of the shaft.
  • a radial discharge channel is provided at the end of the shaft, at which the gas portion of the oil mist stream is removed. From this drainage channel, this oil can escape only in the open state of a provided within this channel closure valve.
  • This closure valve is advantageously designed as a gravity valve that can automatically open under gravity accumulated oil. By means of such a gravity valve, separated oil is not discharged continuously but discontinuously, namely whenever sufficient separated liquid oil has accumulated to open the gravity valve.
  • the pressure gradient within the separator housing may optionally be increased by the use of a pump.
  • the core of the trained as Axialzyklon ⁇ lknebelabscheiders consists of one, a shaft performing tubular Abscheidegephase 1. This is stored in motor-fixed abutments on low-friction bearing as possible. 2. On the inflow side leads a feed channel 3 an oil mist stream axially into the interior of the tubular separator housing 1. The feed channel 3 engages doing so circumferentially with a very small clearance in the interior of the tubular Abscheidegeophuses 1, whereby already a sufficient seal can be given if during operation of Axialzyklones in the interior there is a sufficient negative pressure relative to the atmosphere.
  • the tubular separator housing 1 engages with its outer circumference in a funnel-shaped receiving space 4, which is motor-fixed. In the region in which the tubular separator housing 1 engages in the receiving space 4, it is mounted on the outer wall via one of the bearings 2.
  • This bearing 2 can be designed as an at least largely sealing bearing, whereby the interior of the receiving space 4 can already be sufficiently sealed relative to the atmosphere.
  • a discharge channel 5 Axially in alignment with the tubular separator housing 1 leads from the receiving space 4, a discharge channel 5.
  • a swirl generator 6 Within the tubular separator housing 1 is a swirl generator 6. When operating the Axialzyklones this rotates and is traversed by oil mist in the direction of the feed channel 3 to the discharge channel 5. Deposited oil droplets sink gravitationally in the receiving space 4 down and can escape through a drain opening 7 from this.
  • a drive element for the tubular separator housing 1, by which it is set in rotation, is not entered in the drawing, which is intended to represent the device only schematically.
  • a drive can attack at any point of the tubular separator housing 1.
  • care must be taken for extremely low-friction bearings 2, which is basically possible.
  • sufficient flow energy can also be generated through the use of a pump for conveying the oil mist through the axial cyclone.
  • An axial cyclone in the execution after Fig. 1 can be provided for example in a cover of an internal combustion engine. In particular, almost all parts of the axial cyclone can be economically producible plastic parts. Also, the abutment and connections for the axial cyclone can be rationally integrated into elements of the engine, which are made in particular of plastic.
  • the axial cyclone after Fig. 2 is housed within a motor housing 14.
  • the basic structure of this Axialzyklons corresponds to that after the execution in Fig. 1 , Functionally identical elements are therefore assigned the same reference numerals.
  • a pre-separator 8 On the inflow side, a pre-separator 8 is provided. Within this pre-separator 8, the structure of which will be explained in more detail below, radial feed openings 9 are located in the interior of the tubular separator housing 1.
  • the pre-separator 8 is formed by a funnel 10 which coaxially surrounds the tubular separator housing 1 in the form of a conical jacket in the region of the feed openings 9.
  • the conical shell of the funnel 10 has an axially closed and an axially open end, wherein the closed end is at its narrow and the open end at its wide opening cross-section.
  • the swirl generator 6 In the cavity of the tubular separation housing 1, the swirl generator 6 is provided with a relatively small axial distance to the supply openings 9.
  • This swirl generator 6 has as in the embodiment according to Fig. 1 , in whose description is not discussed here, the task to put the cavity of the tubular Abscheidegeophuses flowing oil mist stream in a swirling flow to thereby downstream of the swirl generator 6 an accumulation separated, liquid oil on the inner wall of the tubular Abscheidegephases 1 in a particularly to achieve high levels.
  • the resultant by such an attachment oil film is indicated in the drawing with near-wall flow arrows.
  • the at least largely freed from liquid oil fractions, gaseous portion of the oil mist stream is exposed downstream of the swirl generator 6 by bold flow arrows.
  • the inner lateral surface of the conical jacket of the funnel 10 is in particular designed like a screw conveyor, specifically in a region which is outlined in the drawing by a dot-dash line 11 in each case.
  • the oil mist stream is rotated by the rotating tubular casing 1, to which the conical shell is fixed, before introducing this oil mist stream into the radial feed openings 9 into the interior of the tubular separation casing 1 arrives.
  • Due to the conical or funnel-shaped course of the conical jacket an axial force component in the direction of the axially open end of the conical jacket arises in the oil deposited on the inner wall of the conical jacket by centrifugal forces as an oil film.
  • This axial component results from the fact that the centrifugal force increases with increasing inner diameter of the inner surface of the conical jacket, resulting in a positive centrifugal force gradient towards the open end of the conical jacket.
  • This gradient results in an axial force component toward the open end of the conical shell which drives oil deposited on the inner circumference of the conical shell toward the axially open end from which it can flow.
  • the conical jacket fulfills the function of a pre-separator 8.
  • the main separation takes place in the cavity of the tubular separator housing 1.
  • the oil mist stream penetrating into the cavity through the radial feed openings 9 is caused to spin by the swirl generator 6 located axially relatively close to these openings 9 in the cavity of the tubular separator housing 1.
  • the swirl generator 6 located axially relatively close to these openings 9 in the cavity of the tubular separator housing 1.
  • a flow of the oil mist through the conical jacket as a pre-separator 8 and the cavity within the tubular separator housing 1 is generated by a negative pressure, which is exposed to the cavity of the tubular Abscheidegephaseuses.
  • the discharge channel 5 is arranged axially aligned with respect to the axis of the tubular separation housing 1. It has an axial distance relative to the tubular separator housing 1, since a receiving space 4 is provided between it and the end of the tubular separator housing 1. From the end of the tubular separator housing 1, a funnel region 12 protrudes into the receiving region 4 fixedly connected to the latter.
  • This flow-ring channel 13 opens in the region of the narrow end of the funnel region 12 outwardly into the enclosed by the motor housing wall 14 motor housing interior 15.
  • Strömungsleitstoff 16 are provided on the outer circumference of the funnel region.
  • any required drive means for the tubular separator housing 1 is not shown in the drawing.
  • the rotational energy for the tubular separator housing 1 may be sufficiently applied by the oil mist stream itself and reacted in the swirl generator.
  • An axially hollow camshaft 101 with a cavity 102 is rotatably mounted in a camshaft housing 103.
  • the bearings of the camshaft are indicated by 104.
  • the camshaft 101 is driven via a sprocket 105 located outside the camshaft housing 103.
  • An oil mist stream, to be separated from the oil as the liquid phase is indicated by arrows A.
  • the oil mist stream to be separated enters the cavity 102 of the camshaft 101 through oil mist supply openings 106 provided in the wall of the camshaft 101.
  • a funnel in the form of a conical shell 107 surrounds these oil mist supply openings 106.
  • the conical shell 107 has an axially closed and an axially open end, the closed end being at its narrow end and the end open end is located at its wide opening cross-section.
  • a swirl generator 108 is provided at a relatively small axial distance to the oil mist supply openings 106.
  • This swirl generator 108 has the task to put the cavity 102 of the camshaft 101 flowing through the oil mist stream in a swirl flow to thereby downstream of the swirl generator 108 can accumulate a separated, liquid oil on the inner wall of the camshaft 101 to achieve a particularly high degree.
  • the resultant by such an attachment oil film is indicated in the drawing with dashed lines 109.
  • the at least largely freed from liquid oil fractions gaseous fraction of the oil mist stream is indicated downstream of the swirl generator 108 with arrows 10.
  • the inner circumferential surface of the conical shell 107 is formed Schnecken everydayartig and that in an area which is outlined in the drawing, each with a dotted line 111.
  • the oil mist stream is rotated by the rotating camshaft 101, to which the conical shell 107 is fixed, before this oil mist stream enters the radial oil supply ports 106 of the camshaft 101.
  • Due to the conical or funnel-shaped course of the conical shell 107 an axial force component in the direction of the axially open end of the conical shell 107 is formed in the oil separated by centrifugal forces as an oil film on the inner wall of the conical shell 107.
  • This axial component results from the fact that the centrifugal force increases with increasing Inner diameter of the inner surface of the conical shell 107 increases, resulting in a positive centrifugal force gradient towards the open end of the conical shell.
  • This gradient in turn leads to an axial component of force in the direction of the open end of the conical shell 107, which drives oil deposited on the inner circumference of the conical jacket to the axially open end, from where it can flow off radially in accordance with the arrows B.
  • the conical jacket 107 fulfills the function of a pre-separator.
  • a flow of the oil mist through the conical jacket as a pre-separator and the cavity 102 of the camshaft 102 is generated by a negative pressure, the cavity 102 of the camshaft 101 is exposed.
  • the gas discharge channel 113 is arranged axially aligned with respect to the axis of the camshaft 101, namely abutting the respective end face of the camshaft 101.
  • the gas discharge passage 113 does not protrude like a dip tube into the cavity 102 of the camshaft 101.
  • the opening cross section of the gas discharge passage 113 may be identical to that of the cavity 102 of the camshaft 101.
  • the oil discharge passage 112 is formed adjacent to the respective end of the camshaft 101 as a ring passage surrounding the gas discharge passage 113, through which separated liquid oil can flow.
  • the annular region of the oil discharge channel 112 merges into an approximately tubular channel section, can drain into the separated liquid oil due to gravity. From this area, the separated, liquid oil can flow into the crank chamber of an internal combustion engine containing the camshaft 102. Since there is a pressure gradient in the direction of the cavity 102 of the camshaft 101 between the cavity 102 of the camshaft 101, on the one hand, and the crank chamber, on the other hand, a so-called gravity valve 117 can be arranged in the oil discharge passage 112.
  • Gravity valve is here understood to mean a closing valve 117 which is opened by the weight of the liquid oil accumulating upstream of the valve.
  • the swirl generator 108 can be easily inserted into the cavity 102 of the camshaft 101 for mounting.
  • a fixing of the swirl generator 108 can be carried out by, for example, a double-sided caulking with material from the inner wall of the camshaft 102.
  • only one Stemmwerkmaschine must be inserted axially into the cavity, on both sides of the camshaft 101, when the swirl generator 102 is to be caulked to both sides axially.
  • the caulked areas are entered in the drawing with 114.
  • the gas discharge passage 113 is fixedly connected to the camshaft housing 103.
  • the interior of the camshaft housing 103 is sealed in the region of the oil discharge channel 103 with respect to this within an adjacent bearing 104 by an annular seal 116.

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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)
  • Centrifugal Separators (AREA)

Claims (5)

  1. Dispositif de séparation de nuage d'huile centrifuge d'un moteur à combustion interne intégré dans un logement de séparateur tubulaire, rotatif lors du fonctionnement de séparation, dans lequel le logement de séparateur est formé par un arbre à cames (101) axial creux, dans lequel le logement de séparateur tubulaire est pourvu :
    - sur une première extrémité d'ouvertures d'introduction de nuage d'huile (106) radiales destinées au nuage d'huile à introduire dans l'espace creux axial du logement de séparateur tubulaire et
    - sur une deuxième extrémité respective à des fins de déviation d'un canal de déviation d'huile (112) radial pour l'huile séparée comme phase liquide d'un côté et d'un canal de déviation de gaz axial (113) d'un autre côté pour le flux de nuage d'huile restant après la fraction liquide séparée,
    caractérisé en ce que
    - un préséparateur de nuage d'huile centrifuge est prépositionné come un préséparateur relié solidement au logement de séparateur tubulaire avant les ouvertures d'introduction de nuage d'huile radiales (106),
    - un générateur de tourbillon (108) est prévu comme séparateur final à l'intérieur de l'espace creux axial du logement de séparateur tubulaire.
  2. Dispositif de séparation de nuage d'huile centrifuge selon la revendication 1,
    caractérisé en ce que
    le préséparateur est conçu comme une gaine conique enveloppant coaxialement le logement de séparateur tubulaire, entourant les ouvertures d'introduction de nuage d'huile (106), dans lequel son extrémité étroite est fermée axialement et est coordonnée aux ouvertures d'introduction de nuage d'huile radiales (106).
  3. Dispositif de séparation de nuage d'huile centrifuge selon la revendication 2,
    caractérisé en ce que
    la surface intérieure de la gaine conique du préséparateur est conçue en forme de vis sans fin et comportant un dispositif de transport orienté vers l'extrémité large de la gaine conique.
  4. Dispositif de séparation de nuage d'huile centrifuge selon une des revendications précédentes,
    caractérisé en ce que
    le générateur de tourbillons (108) constitue un composant inséré dans l'espace creux axial du logement de séparateur tubulaire et fixé à cet endroit par une déformation du matériau d'arbre résultant de l'insertion.
  5. Dispositif de séparation de nuage d'huile centrifuge selon une des revendications précédentes,
    caractérisé en ce que
    le canal de déviation de gaz axial (113) prévu sur la deuxième extrémité du logement de séparateur tubulaire est conçu de manière stationnaire par rapport au logement de séparateur tubulaire, positionné rotativement de manière à s'aligner axialement devant le côté frontal correspondant de celui-ci.
EP06722839.5A 2005-05-10 2006-05-06 Dispositif centrifuge separateur de brouillard d'huile integre dans un arbre axialement creux d'un moteur a combustion interne Ceased EP1880085B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE200510022254 DE102005022254A1 (de) 2005-05-10 2005-05-10 In eine axial hohle Nockenwelle eines Verbrennungsmotors integrierte Zentrifugal-Ölnebelabscheidereinrichtung
DE102005042725A DE102005042725A1 (de) 2004-09-23 2005-09-08 Axialzyklon als Ölnebelabscheider eines Kraftfahrzeug-Verbrennungsmotors
PCT/DE2006/000781 WO2006119737A1 (fr) 2005-05-10 2006-05-06 Dispositif centrifuge separateur de brouillard d'huile integre dans un arbre axialement creux d'un moteur a combustion interne

Publications (3)

Publication Number Publication Date
EP1880085A1 EP1880085A1 (fr) 2008-01-23
EP1880085B1 EP1880085B1 (fr) 2010-08-11
EP1880085B2 true EP1880085B2 (fr) 2013-10-09

Family

ID=37000109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06722839.5A Ceased EP1880085B2 (fr) 2005-05-10 2006-05-06 Dispositif centrifuge separateur de brouillard d'huile integre dans un arbre axialement creux d'un moteur a combustion interne

Country Status (5)

Country Link
US (1) US7717101B2 (fr)
EP (1) EP1880085B2 (fr)
JP (1) JP5124448B2 (fr)
DE (2) DE502006007644D1 (fr)
WO (1) WO2006119737A1 (fr)

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US7717101B2 (en) 2010-05-18
EP1880085A1 (fr) 2008-01-23
EP1880085B1 (fr) 2010-08-11
WO2006119737A1 (fr) 2006-11-16
JP5124448B2 (ja) 2013-01-23
DE112006000356A5 (de) 2007-11-22
US20070294986A1 (en) 2007-12-27
DE502006007644D1 (de) 2010-09-23

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