WO1998048157A1 - Turbocompresseur equipe d'un element coulissant - Google Patents

Turbocompresseur equipe d'un element coulissant Download PDF

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Publication number
WO1998048157A1
WO1998048157A1 PCT/JP1997/003346 JP9703346W WO9848157A1 WO 1998048157 A1 WO1998048157 A1 WO 1998048157A1 JP 9703346 W JP9703346 W JP 9703346W WO 9848157 A1 WO9848157 A1 WO 9848157A1
Authority
WO
WIPO (PCT)
Prior art keywords
sliding member
compressor
turbocharger
fresh air
compressor housing
Prior art date
Application number
PCT/JP1997/003346
Other languages
English (en)
Japanese (ja)
Inventor
Masami Shimizu
Kiyohiko Ebara
Original Assignee
Kyoritsu Corp.
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 Kyoritsu Corp. filed Critical Kyoritsu Corp.
Priority to JP54540498A priority Critical patent/JP3639846B2/ja
Publication of WO1998048157A1 publication Critical patent/WO1998048157A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
    • 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
    • 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
    • F02B39/00—Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/16—Sealings between pressure and suction sides
    • F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
    • F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/40—Application in turbochargers
    • 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 present invention relates to a turbocharger that compresses fresh air and sends the fresh air to an internal combustion engine within a range where a blade provided on a compressor impeller contacts an inner wall of a compressor housing forming the turbocharger.
  • the present invention relates to a turbocharger with a sliding member equipped with a sliding member.
  • a turbocharger using exhaust pressure (hereinafter referred to as exhaust pressure) is used to burn more air-fuel mixture and improve engine output.
  • the turbine wheel is driven by using high-temperature, high-pressure exhaust residual energy that has not been converted into mechanical energy in the cylinder of the internal combustion engine, and is connected to this turbine wheel coaxially through the mouth-to-mouth shaft.
  • the compressor impeller compresses fresh air and sends the compressed fresh air to the internal combustion engine.
  • the pressure in the cylinder becomes high and the combustion energy in the combustion chamber increases. Then, the combustion energy is converted into mechanical energy via a piston, a crankshaft, and the like, so that the engine output can be improved.
  • a turbocharger generally has a structure in which a turbine wheel having blades and a compressor impeller are connected by a rotor shaft, and each is entirely covered by a turbine housing and a compressor housing.
  • the compressor impeller provided inside the compressor housing is provided with a plurality of blades whose edges are formed along the wall surface of the compressor housing.
  • the compressor housing and compressor impeller must be configured so that the blades do not contact the inner wall of the compressor housing when the complex sine wheel rotates.
  • the compression efficiency can be improved without sacrificing the durability of the compressor housing and the compressor sine propeller.
  • the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a turbocharger that can obtain high compression efficiency without sacrificing durability at low cost.
  • the present invention employs the following means in order to solve the above problems.
  • a taper charger with a sliding member according to the present invention is provided inside a turbine housing, and is connected to a turbine wheel that converts exhaust pressure flowing from an internal combustion engine into rotational force, and is connected to the turbine wheel.
  • a rotor shaft that transmits the rotational force of the turbine wheel;
  • a compressor impeller that is connected to the rotor shaft and that compresses the fresh air taken in by the rotational force and sends it to the internal combustion engine;
  • a compressor housing that covers the housing.
  • a groove corresponding to an outer edge length from the inlet of the fresh air to the outlet of the complex sign impeller corresponding to a range within 1 Z2 of the outer edge from the outlet is formed on the inner wall of the compressor housing. And a sliding member is mounted in this groove so as to protrude to a point just before the complex sign wheel comes into contact with the groove.
  • a groove is formed on the inner wall of the compressor housing corresponding to a range within 12 of the outer edge length from the outflow port, and a sliding member is projected from this groove to just before the compressor sine contact.
  • the turbocharger compressor housing with a sliding member according to the present invention is provided inside the turbine housing, and is connected to the turbine wheel for converting exhaust pressure flowing from the internal combustion engine into rotational force, and to the turbine wheel, A rotor shaft that transmits the rotational force of the turbine wheel, and an internal combustion engine that is connected to the rotor shaft and compresses the fresh air taken in by the rotational force.
  • the present invention relates to a nighttime charger including a compressor impeller for pumping the compressed air to a stake, and a compressor housing for covering the compressor impeller.
  • the sliding member may be attached to the inner wall of the compressor housing over the entire contact surface between the compressor housing and the compressor sign wheel.
  • the clearance between the compressor housing and the compressor impeller can be reduced as much as possible by projecting the sliding member, so that there is no loss of efficiency due to leakage of fresh air, and the speed of the turbocharger is reduced.
  • the acceleration response in the region can be improved.
  • FIG. 1 is an exploded perspective view of a turbocharger according to the present embodiment.
  • FIG. 2 is a cross-sectional view of the turbocharger according to the present embodiment.
  • FIG. 3 is an enlarged view of a compressor housing according to the first embodiment.
  • FIG. 5 is an enlarged view of a compressor housing according to the second embodiment.
  • FIG. 6 is an enlarged view of a compressor housing according to another embodiment.
  • Fig. 7 (a) is a side view of the sliding member, and (b) is a plan view of the sliding member.
  • FIG. 9 is a view for explaining a method of manufacturing a sliding member.
  • the turbocharger 30 usually operates as a turbocharger that converts exhaust pressure into rotational force. And a compressor impeller 36 connected via a rotor shaft 35 with the evening wheel 31. These components are each covered by a housing.
  • the turbine wheel 31 is rotated by the exhaust pressure of the exhaust gas flowing from the exhaust inlet 32, and the exhaust gas subjected to the energy conversion is exhausted from the exhaust outlet 33.
  • the rotational force of the turbine wheel 31 is transmitted to the compressor spar 36 via a rotor shaft 35, and fresh air taken in from a fresh air inlet 37 is supplied to a plurality of blades provided in the sine compressor spar 36. It is compressed and sent to the internal combustion engine through the flow path between the two.
  • the turbocharger 30 activates the wastegate valve 3. 9, the exhaust gas upstream of the turbine wheel 31 is bypassed downstream of the turbine wheel 31 so that the exhaust pressure applied to the turbine wheel 31 can be adjusted.
  • the turbocharger with a sliding member 1 has an exhaust inlet 2 for taking in exhaust gas from the internal combustion engine, an exhaust outlet 5 for exhausting exhaust gas, and an exhaust bypass 6 arranged near the exhaust inlet 2. And a turbine housing 4 containing a turbine wheel 3 that is rotationally driven by the pressure of the exhaust gas flowing from the exhaust inlet 2.
  • the turbocharger 1 has a fresh air inlet 7 for taking in fresh air and a fresh air outlet 10 for discharging fresh air, and compresses fresh air flowing from the fresh air inlet 7.
  • a compressor housing 9 that houses a compressor impeller 8 is provided.
  • the turbine housing 4 and the compressor housing 9 are connected by a connecting member 17.
  • the connecting member 17 is provided with a port shaft 11 for coaxially connecting the turbine wheel 3 and the compressor impeller 8. Rotatably supported I have. Further, a lubricating oil passage 12 for supplying lubricating oil to the bearing portion of the rotor shaft 11 is formed in the connecting member 17.
  • a plurality of blades 13A and 13B are provided on the surfaces of the turbine wheel 3 and the compressor impeller 8, and the blade 13B provided on the turbine wheel 3 has a rear end. It has a curved shape from to the tip.
  • the blades 13A provided on the complex sine propeller 8 are usually formed by alternately arranging long impellers 13A and short impellers 13A having different streamlines.
  • the length of the streamline refers to the length of the outer edge of the compressor impeller 8 from the fresh air inlet to the outlet, and is also referred to as the shroud length.
  • the outer edge of the compressor impeller 8 is generally referred to as a “compressed sign”, and the outer edge of the inner wall of the complex housing 9 is referred to as a shroud 16 of the compressor housing.
  • the material of the blade 13A is generally made of aluminum, and the impeller 13B provided on the turbine wheel 3 is made of heat-resistant steel having a large specific gravity.
  • ceramics with good heat resistance and low specific gravity may be used instead of heat resistant steel.
  • the compressor housing 9 includes a shroud in order to reduce the clearance between the blades 13 A provided in the complex compressor 8 and the shroud section 16 as much as possible.
  • a groove 14 is provided in the slot 16 and a clearance is provided just before the blade 13 A comes in contact with the shroud 16, and the sliding member 15 protrudes from the shroud 16 in the groove 14. I am wearing it.
  • the method of mounting the sliding member 15 is to apply an adhesive to the groove 14 or the sliding member 15 and press-fit the sliding member 15 into the groove 14.
  • the range in which the groove 14 is provided should be within 12 L of the outer edge length L from the inlet to the outlet of the fresh air of the compressor impeller 8, and the length from the outlet to 1/2 of this length. Up to L
  • the pressure of fresh air rises in the range from the outlet to 1/2 L, and if the clearance in this range is made sufficiently small, the efficiency of the turbocharger can be increased. Conversely, if there is clearance in this range, fresh air will leak from this gap, A swirling flow is generated, reducing the efficiency of the turbocharger.
  • the reason why the groove 14 in which the sliding member is mounted is set from the outlet to 1 Z 2 ⁇ L is that it is enough to prevent fresh air from leaking in a range where the pressure increases.
  • the apparent clearance on the inflow side of the fresh air of the blade is smaller than that on the outflow side. From this, until the complex sine propeller 8 obtains a sufficient rotation speed, the contact ratio between the shroud portion 16 of the compressor housing 9 and the sliding member increases on the inflow side. Furthermore, the blade on the inflow side compared to the outflow side of the fresh air has a small blade thickness and low rigidity, so that the blade may be damaged by fatigue due to contact, and this is to prevent this.
  • the rotational speed of the compressor impeller 8 may decrease due to frictional force at the contact surface.Therefore, the rotational speed of the compressor impeller 8 must not be reduced. However, it is necessary to make the clearance as low as possible to meet the conflicting demand of pumping fresh air without escaping.
  • the turbocharger with a sliding member 1 pumps fresh air to the internal combustion engine without releasing fresh air from the gap between the compressor housing 9 and the blade 13A.
  • the acceleration performance in the low-speed range can be improved.
  • this sliding member is a resin in which about 50% (weight) of polytetrafluoroethylene (hereinafter referred to as PTFE) and about 50% (weight) of synthetic mica are chemically bonded.
  • PTFE polytetrafluoroethylene
  • the generic name is Fluoroscint 500.
  • This resin has much less load deformation at high temperatures than fluororesin, and its thermal dimensional stability is close to that of aluminum.
  • the linear expansion coefficient is one fifth of P TF E, it is not necessary to consider the fit / clearance.
  • the hardness is one-third that of PTFE with improved friction characteristics while maintaining the friction characteristics of PTFE.
  • This resin has friction coefficient and friction due to non-rough friction Low speed does not wear metal material.
  • the electrical performance is about the same as unfilled PTFE.
  • the turbocharger with a sliding member is provided on the inner wall of the shroud portion 21 of the compressor housing over the entire contact surface between the shroud portion 21 and the blade 22.
  • a groove 23 is provided, and a sliding member 24 is mounted in the groove 23.
  • the sliding member 23 is formed by chemically binding about 50% (by weight) of PTFE and about 50% (by weight) of synthetic mica. It is preferable to use a sliding member made of SINT500.
  • the turbocharger with a sliding member described above is a turbocharger with an intercooler that cools the supply air whose temperature has risen with a heat exchanger, and a turbocharger with a waste gate that prevents the supply pressure and exhaust pressure from becoming excessive.
  • it can be used as a variable turbocharger for varying the exhaust turbine inlet area of a turbocharger or a ceramic turbocharger using ceramic as a turbine material.
  • a method for mounting the sliding member a method is used in which a groove is formed in the shroud portion of the compressor housing, an adhesive is applied to the sliding member or the groove, and the sliding member is pressed into the groove.
  • a C-shaped ring 45 is fitted to the outer wall of the cylindrical sliding member 44, A groove 43 having an annular concave portion 43 a into which the C-shaped ring 45 fits is formed in a shroud portion 42 of the compressor housing 40, and the sliding member 44 is formed into the groove 43. May be introduced.
  • the sliding member 44 is formed so that the axial length thereof is substantially the same as the axial length of the groove 43, and the inner peripheral surface 44b is formed of the blade 41 of the compressor impeller 41. a It is assumed to be formed to have substantially the same shape as the edge portion and to protrude from the shroud portion 42. Further, a groove 44 a for fitting the C-shaped ring 45 is formed on the outer peripheral surface of the sliding member 44 at a position corresponding to the recess 43 a of the groove 43.
  • the sliding member 44 since the sliding member 44 is locked to the stepped portion of the groove 43 via the C-shaped ring 45, the sliding member 44 can be applied without applying an adhesive. It does not fall out of the groove 43, and it becomes more difficult to fall off if an adhesive is used in combination.
  • the present invention is applicable to a turbocharger that compresses fresh air and pressure-feeds the fresh air to an internal combustion engine. Further, the present invention can realize a turbocharger having high durability and high compression performance with a simple configuration, and thus is suitable for mass production.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)

Abstract

Dans un turbocompresseur servant à comprimer l'air aspiré vers l'intérieur d'un moteur à combustion interne, une solution économique permet de limiter au maximum le jeu entre le carter du compresseur et l'hélice du compresseur et d'améliorer la réaction d'accélération dans une plage de vitesses lentes. Une rainure (14) correspondant à une plage non supérieure à la moitié de la longueur du bord extérieur depuis un orifice de sortie d'écoulement est située sur la paroi intérieure du carter (9) du compresseur et un élément coulissant (14) est placé dans cette rainure (14), de manière à se projeter vers l'extérieur afin de venir pratiquement en contact avec l'hélice (8) du compresseur, ce qui limite au maximum le jeu entre le carter (9) et l'hélice (8). Etant donné que cet élément coulissant (15) doit simplement être placé dans la rainure, on peut fabriquer sans difficultés ce type de turbocompresseur.
PCT/JP1997/003346 1997-04-22 1997-09-19 Turbocompresseur equipe d'un element coulissant WO1998048157A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54540498A JP3639846B2 (ja) 1997-04-22 1997-09-19 滑り部材付きターボチャージャ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10463997 1997-04-22
JP9/104639 1997-04-22

Publications (1)

Publication Number Publication Date
WO1998048157A1 true WO1998048157A1 (fr) 1998-10-29

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PCT/JP1997/003346 WO1998048157A1 (fr) 1997-04-22 1997-09-19 Turbocompresseur equipe d'un element coulissant

Country Status (2)

Country Link
JP (1) JP3639846B2 (fr)
WO (1) WO1998048157A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013014743A1 (fr) * 2011-07-25 2013-01-31 トヨタ自動車 株式会社 Carter de compresseur et compresseur de suralimentation de turbine d'échappement
WO2016136681A1 (fr) * 2015-02-25 2016-09-01 株式会社オティックス Boîtier de compresseur pour surcompresseur et son procédé de fabrication
WO2016136037A1 (fr) * 2015-02-25 2016-09-01 株式会社オティックス Boîtier de compresseur pour compresseur d'alimentation
US10683870B2 (en) 2015-03-24 2020-06-16 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. Impeller cover, rotary machine, and impeller cover manufacturing method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014047714A (ja) * 2012-08-31 2014-03-17 Toyota Motor Corp ターボチャージャ
JP2014047726A (ja) * 2012-08-31 2014-03-17 Toyota Motor Corp タービンハウジング及び排気タービン過給機
CN107250552B (zh) 2015-02-27 2020-02-14 三菱重工发动机和增压器株式会社 增压器的制造方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06257454A (ja) * 1993-03-10 1994-09-13 Hitachi Ltd 自動車用ターボチャージャのコンプレッサケース
JPH06307250A (ja) * 1993-04-20 1994-11-01 Hitachi Ltd 過給機用コンプレッサハウジング
JPH09170442A (ja) * 1995-12-20 1997-06-30 Hitachi Ltd 内燃機関の過給機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06257454A (ja) * 1993-03-10 1994-09-13 Hitachi Ltd 自動車用ターボチャージャのコンプレッサケース
JPH06307250A (ja) * 1993-04-20 1994-11-01 Hitachi Ltd 過給機用コンプレッサハウジング
JPH09170442A (ja) * 1995-12-20 1997-06-30 Hitachi Ltd 内燃機関の過給機

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013014743A1 (fr) * 2011-07-25 2013-01-31 トヨタ自動車 株式会社 Carter de compresseur et compresseur de suralimentation de turbine d'échappement
CN103748335A (zh) * 2011-07-25 2014-04-23 丰田自动车株式会社 压缩机壳体以及废气涡轮增压器
JP5664785B2 (ja) * 2011-07-25 2015-02-04 トヨタ自動車株式会社 コンプレッサハウジング及び排気タービン過給機
CN103748335B (zh) * 2011-07-25 2016-05-04 丰田自动车株式会社 压缩机壳体以及废气涡轮增压器
US9388821B2 (en) 2011-07-25 2016-07-12 Toyota Jidosha Kabushiki Kaisha Compressor housing and exhaust turbine supercharger
WO2016136681A1 (fr) * 2015-02-25 2016-09-01 株式会社オティックス Boîtier de compresseur pour surcompresseur et son procédé de fabrication
WO2016136037A1 (fr) * 2015-02-25 2016-09-01 株式会社オティックス Boîtier de compresseur pour compresseur d'alimentation
JPWO2016136037A1 (ja) * 2015-02-25 2017-11-30 株式会社オティックス 過給機用のコンプレッサハウジング
CN107614848A (zh) * 2015-02-25 2018-01-19 株式会社欧德克斯 增压器用的压缩机壳体
EP3263911A4 (fr) * 2015-02-25 2018-02-21 OTICS Corporation Boîtier de compresseur pour surcompresseur et son procédé de fabrication
US10683870B2 (en) 2015-03-24 2020-06-16 Mitsubishi Heavy Industries Engine & Turbocharger, Ltd. Impeller cover, rotary machine, and impeller cover manufacturing method

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