EP3721066A1 - Ensemble formant soupape de décharge pour un turbocompresseur à gaz d'échappement - Google Patents

Ensemble formant soupape de décharge pour un turbocompresseur à gaz d'échappement

Info

Publication number
EP3721066A1
EP3721066A1 EP18819016.9A EP18819016A EP3721066A1 EP 3721066 A1 EP3721066 A1 EP 3721066A1 EP 18819016 A EP18819016 A EP 18819016A EP 3721066 A1 EP3721066 A1 EP 3721066A1
Authority
EP
European Patent Office
Prior art keywords
wastegate
bearing bush
wastegateanordnung
sealing ring
exhaust gas
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.)
Pending
Application number
EP18819016.9A
Other languages
German (de)
English (en)
Inventor
Christian RÖMER
Christian Kirschner
Markus Pflüger
Maximilian Hoffmann
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.)
ElringKlinger AG
Vitesco Technologies GmbH
Original Assignee
ElringKlinger AG
Vitesco Technologies 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 ElringKlinger AG, Vitesco Technologies GmbH filed Critical ElringKlinger AG
Publication of EP3721066A1 publication Critical patent/EP3721066A1/fr
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere
    • F02B37/183—Arrangements of bypass valves or actuators therefor
    • F02B37/186—Arrangements of actuators or linkage for bypass valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2028—Details of bearings for the axis of rotation
    • F16K1/2035—Details of bearings for the axis of rotation the axis of rotation having only one bearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
    • F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
    • F16K1/20—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation arranged externally of valve member
    • F16K1/2042—Special features or arrangements of the sealing
    • F16K1/2078—Sealing means for the axis of rotation
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a Wastegatean Aunt for a gas turbocharger from.
  • An exhaust gas turbocharger usually has a turbine housing, a compressor housing and a bearing housing arranged between the turbine housing and the compressor housing.
  • a turbine housing mounted on a shaft turbine wheel is provided, which is driven by the exhaust gas flow of a Brennkraftma machine.
  • the rotational movement of the shaft is carried on a likewise mounted on the shaft compressor wheel, which is arranged in the compressor housing.
  • the Wel le is rotatably mounted in the bearing housing.
  • This wastegate arrangement has inter alia a wastegate flap closing a wastegate channel, a wastegate spindle and a wastegate flap lever.
  • the wastegate flap lever is part of a Linkagesystems, which further includes a rule Stan ge and an actuator.
  • This Linkagesystem allowed ei ne adjustment of the wastegate flap such that it is closed in front of small exhaust gas mass flows and is open in the presence of large exhaust gas mass flows. Consequently, in the presence of small exhaust gas mass flows of the entire exhaust gas mass flow is supplied to the turbine wheel and drives it. In the presence of large exhaust gas mass flows is part of the Exhaust gas mass flow past the turbine wheel passes through the wastegate channel and thus bypasses the turbine wheel.
  • a control flap assembly of an exhaust gas turbocharger comprises a flap plate, a binengephaseuse by means of a bushing in the door guided flap shaft and a sealing device for sealing the flap shaft to at least one Dichtstel le.
  • the flap shaft is connected via an outer flap lever with a control rod of a drive and an inner flap lever with the flap plate.
  • the Dichtein direction has at least one resilient sealing lip which presses under bias on the sealing point.
  • an actuator for an exhaust gas flow control of an exhaust gas turbocharger which may be a Wastegateanssen.
  • This Wastegatean Aunt has a ge in a bushing led wastegate spindle, which is connected to a Spindelstellele element.
  • a metal ring is provided as a seal, which has resilient properties.
  • This sheet metal ring is plate-shaped and has a central opening, an inner ring portion and an outer Ringbe rich, wherein the inner ring portion rich with the outer ring is connected by a central ring portion.
  • the inner and outer ring portion are flat and lie in the mirror axis perpendicular, in the axial direction staggered planes, while the middle Ringbe rich in section along the axis obliquely to the other two annular areas.
  • Wastegatespindel a Wastegatean Aunt is - as stated before standing - usually in a bearing bush gela siege, which is pressed into the turbine housing. Since during operation of the exhaust gas turbocharger the wastegate spindle heats up faster than the bearing bushing, the wastegate spindle can get stuck inside the bearing bush. To this To avoid jamming, the thermal expansion of the wastegate spindle can be compensated by a larger diameter of the bearing bush compared to the diameter of the wastegate spindle. Due to the resulting gap dimension can escape during operation of the exhaust gas turbocharger part of the exhaust gas mass flow undesirably from the turbine housing through a leak between the bearing bush and the wastegate spindle in the environment of the exhaust gas turbocharger.
  • WO 2013/0173 055 A1 discloses a shaft sealing system for a turbocharger.
  • a spring-loaded, self-centering, complementary pair of opposing sealing surfaces is used to seal a leakage gap between the shaft and a bearing bush. These sealing surfaces are compressed by the force of the spring to achieve the desired seal.
  • a shaft device ei Nes turbocharger wherein the shaft means comprises a shaft which is arranged in a bearing bush means, wherein the bearing bush means at one or both ends of a receptacle for a sealing device has, which is in radial direction sealingly applied to a respective sealing surface.
  • the object of the invention is to provide a Wastegateanord- tion, in which the escape of a portion of the exhaust gas mass flow through the leakage gap between the bearing bush and the wastegate spindle is avoided in the environment.
  • a wastegate assembly according to the invention comprises a waste gate flap, a wastegate flap lever, a wastegate pin, and a wastegate spindle bearing bushing. Furthermore, it contains a sealing unit which is formed by a Volu mendichtring made of soft material and a ring with the volume density contacted plate spring.
  • the bearing bush preferably has a Verbreiterungsab section, in which the volume sealing ring is inserted.
  • the volume sealing ring consists of soft material, preferably graphite or mica, in which one or more carrier layers, such as steel strips, are layered.
  • the diaphragm spring is made of high temperature Materi al, for example, for temperatures above 300 ° C, preferably, temperatures above 500 ° C, resistant, preferably made of steels with a Ni content of 6.0-13.0%, a Cr content of 13-21%, a C content below 2% and a Mn content below 2%, or made of materials having a Ni content of over 50%, a Cr content of 17-22%, a Ti content of 0.5-2 , 0% and an Al content of over 0.5%. These materials are characterized by the fact that the mechanical properties and the thermal resistance are still sufficient for the spring function of the diaphragm spring at high temperatures.
  • the widening portion of the bearing bush in which the wastegate flap lever end facing the bearing bush is arranged.
  • the diaphragm spring is between tween the volume seal made of soft material and the wastegate lever positioned.
  • the diaphragm spring seals between the wastegate flap lever and the volume sealing ring made of soft material and replaces the wear that occurs over the service life of this sealing system.
  • the volume sealing ring made of soft material is in an advantageous Wei se in the widening portion of the bearing bush is pressed to achieve the desired sealing effect.
  • This Pressing the volume sealing ring in the Verbreiterungsab section takes place in the axial direction, ie in the direction of the longitudinal axis of the wastegate spindle.
  • This pressing in the axial direction is due to a strong plasticization of the material of the volume seal a high force in radia ler direction exerted both on the bearing bush and on the wastegate spindle.
  • FIG. 1 shows a perspective sketch to illustrate the structure of an exhaust gas turbocharger equipped with a wastegate arrangement
  • Figure 2 is a sectional view for illustrating a
  • 3 is a sectional view illustrating the leak path between the wastegate spindle and its La gerbüchse
  • FIG. 4 is a sectional view illustrating a first embodiment of the invention
  • Figure 5 is an enlarged view of a portion of the sectional view shown in Figure 4.
  • Figure 6 is a sectional view for illustrating a
  • FIG. 1 shows a perspective sketch for the illustration of the structure of an exhaust gas turbocharger equipped with a wastegate arrangement.
  • This exhaust gas turbocharger has a Turbine housing 1, a compressor housing 2 and arranged between the turbine housing and the compressor housing bearing housing 3.
  • the turbine housing 1 is connected to the exhaust manifold 1a of an internal combustion engine via which a hot exhaust gas mass flow of the internal combustion engine is supplied to the turbine wheel arranged in the turbine housing.
  • the turbine wheel is driven by this hot exhaust gas mass flow or rotated.
  • the shaft of the exhaust gas turbocharger not shown, on which the door is arranged binenrad, is rotated.
  • This rotation of the shaft of the exhaust gas turbocharger is transmitted to the housing 2 in the Ver Whyrge and also mounted on the shaft of Abgastur boladers attached compressor wheel. This rotation of the compressor wheel compresses fresh air supplied to the compressor. This compressed fresh air is supplied to the internal combustion engine to increase their performance.
  • the shaft of the exhaust gas turbocharger is rotatably mounted in the bearing housing 3.
  • FIG. 1 shows a Wastegatean Aunt 5 ge shows.
  • This is arranged in the turbine housing 1 and has a wastegate flap 5a that can be actuated via a wastegate flap lever 5c and a wastegate spindle 5b and that is designed to open and close a wastegate channel. Be the operation or control of the wastegate flap using an actuator 6, which is connected via an actuating element 6a with the wastegate lever 5c.
  • Figure 2 shows a sectional view Ver Veraulaulung a Wastegateanssen.
  • the wastegate arrangement shown in FIG. 2 has a wastegate flap 5a, which is connected to the wastegate flap lever 5c of a linkage system 14 via a wastegate spindle 5b.
  • Wastegate spindle 5b is connected in its lower end region in FIG. 2 to the wastegate flap 5a and in its upper end region to the wastegate lever 5c.
  • the Wastegatespindel 5 b is guided in the bearing bush 7, which is pressed into the turbine housing 1 a.
  • FIG 3 has a sectional view illustrating the leak path 9 between the Wastega tespindel 5 b and the bearing bush 7 to the object. From this sectional view it can be seen that this leak path 9 extends over the entire length of the bearing bushing 7. He is in his lower end with a flow direction behind the turbine arranged exhaust chamber 10 in connec tion. Exhaust gas enters the leakage path 9 from this exhaust gas space 10, passes through it and is discharged in the upper end region of the bearing bush 7 through a gap between the bearing bush 7 and the wastegate flap lever 5c to the environment 8 in an undesired manner.
  • a seal which is ge of a volume sealing ring and contacted with the volume sealing ring plate spring forms.
  • a volume sealing ring is understood to be a seal for high-temperature applications, which has a sealing ring which is encircling a ring axis in a direction of rotation and has the opposite high temperature. temperatures, for example, temperatures above 300 ° C, preferably, temperatures above 500 ° C, is formed resistant.
  • This volume sealing ring is made of soft material, preferably graphite or mica, in which preferably one or more thin support layers, for example, fabric layers, preferably steel strips or steel foils, are incorporated, which upon insertion of the volume seal at its sealing point together with the graphite or Glim mer be pressed.
  • FIG. 4 is a sectional view illustrating a first embodiment of the invention.
  • the Wastegatespindel 5 b in egg ner pressed into the turbine housing 1 bearing bushing 7 leads GE.
  • This bearing bushing 7 has in its in Figure 4 obe ren end portion of a Wastegatespindel 5b surrounding Ver broadening section 7a.
  • a volume sealing ring made of soft material 11 is set, which is preferably be made of graphite or mica be, in which one or more carrier layers, for example, thin steel strips are layered.
  • This volume sealing ring 11 is used during assembly of Wastegateanord- tion in Figure 4 from above in the axial direction in the Unitedology ceremoniessabexcellent 7 a of the bearing bush 7.
  • a disc spring 17 is placed from above in the axial direction of the volumetric seal 11 and used to bias the volume seal 11 in the axial and ra dialer direction. It is exerted by the compression of the volume sealing ring 11 in the axial direction due to a strong plasticization of the material of the volume sealing ring 11, a high force in the radial direction 16 on both the La gerbüchse 7 and 5b on the wastegate spindle. This creates a radial bias between the bearing bushing 7 and the wastegate spindle 5b, which is maintained over the operating life of the Wastegatean angel.
  • the sealing effect of the volume seal 11 is increased such that in Be drove the exhaust gas turbocharger an undesirable escape of passed through the leak path 9 exhaust We are effectively prevented from reaching the environment.
  • FIG. 5 shows an enlarged view of a portion of the sectional view shown in FIG.
  • the turbine housing 1 the Ver are broader portion 7a of the bearing bush 7, the Wastegatespin del 5b, the plate spring 17, the volumetric seal 11 and the wastegate lever 5c illustrated.
  • the force paths 12 and the sealing surfaces 13 are illustrated, resulting in or through the insertion and compression of the volume sealing ring 11 into the extension 7a of the bearing bush.
  • the turbine housing 1 has a receiving stage 1b for receiving the widening portion 7a of the bearing bush.
  • Figure 6 is a sectional view illustrating a second embodiment of the invention. This differs from the first embodiment shown in Figure 4 only in that even in the lower end of the bearing bush 7, a volume sealing ring 11 is vorgese hen. This further volume sealing ring increases the safety that no exhaust gas can be discharged from the exhaust gas chamber 10 via the leak path 9 to the environment 8.
  • Reference sign list

Abstract

L'invention concerne un ensemble formant soupape de décharge pour un turbocompresseur à gaz d'échappement comportant un carter de turbine. Ledit ensemble formant soupape de décharge comporte un clapet de soupape de décharge (5a), un levier de clapet de soupape de décharge (5c), une broche de soupape de décharge (5b) et un coussinet (7) pour la broche de soupape de décharge (5b). L'ensemble formant soupape de décharge comporte du reste une unité d'étanchéité (11, 17) qui est formée par une bague d'étanchéité de volume (11) composée d'un matériau souple et d'une rondelle-ressort (17) mise en contact avec la bague d'étanchéité de volume (11).
EP18819016.9A 2017-12-05 2018-12-04 Ensemble formant soupape de décharge pour un turbocompresseur à gaz d'échappement Pending EP3721066A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017128830.9A DE102017128830A1 (de) 2017-12-05 2017-12-05 Wastegateanordnung für einen Abgasturbolader
PCT/EP2018/083469 WO2019110581A1 (fr) 2017-12-05 2018-12-04 Ensemble formant soupape de décharge pour un turbocompresseur à gaz d'échappement

Publications (1)

Publication Number Publication Date
EP3721066A1 true EP3721066A1 (fr) 2020-10-14

Family

ID=64664716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18819016.9A Pending EP3721066A1 (fr) 2017-12-05 2018-12-04 Ensemble formant soupape de décharge pour un turbocompresseur à gaz d'échappement

Country Status (5)

Country Link
US (1) US20200291850A1 (fr)
EP (1) EP3721066A1 (fr)
CN (1) CN111566327A (fr)
DE (1) DE102017128830A1 (fr)
WO (1) WO2019110581A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005113797A (ja) * 2003-10-08 2005-04-28 Aisin Seiki Co Ltd ターボチャージャの排気ガスシール構造
DE102009030520A1 (de) 2008-07-25 2010-01-28 Borgwarner Inc., Auburn Hills Regelklappenanordnung eines Abgasturboladers
DE102008057207A1 (de) * 2008-11-13 2010-05-27 Continental Mechanical Components Germany Gmbh Welleneinrichtung mit einer Dichtungsvorrichtung
DE202011109832U1 (de) 2011-06-17 2012-04-03 Elringklinger Ag Betätigungseinrichtung für ein Abgasstrom-Steuerelement eines Abgasturboladers
DE202012004719U1 (de) * 2012-05-11 2012-05-29 Borgwarner Inc. Regelklappenanordnung eines Abgasturboladers
DE112013002028T5 (de) * 2012-05-17 2015-03-12 Borgwarner Inc. Wellenabdichtungssystem für einen Turbolader
GB201221116D0 (en) * 2012-11-23 2013-01-09 Aes Eng Ltd T0 compound seal
CN204226644U (zh) * 2014-09-04 2015-03-25 刘洪国 多齿辊卸料机密封装置
JP5907298B2 (ja) * 2015-04-16 2016-04-26 株式会社デンソー 内燃機関の排気装置
CN105371023A (zh) * 2015-12-16 2016-03-02 湖南埃瓦新能源科技有限公司 一种双密封防脱式连接装置
CN206221643U (zh) * 2016-11-24 2017-06-06 开原化工机械制造有限公司 一种径向自紧密封人孔

Also Published As

Publication number Publication date
WO2019110581A1 (fr) 2019-06-13
US20200291850A1 (en) 2020-09-17
CN111566327A (zh) 2020-08-21
DE102017128830A1 (de) 2019-06-06

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