KR20070056961A - Two-stage supercharging system - Google Patents

Two-stage supercharging system Download PDF

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Publication number
KR20070056961A
KR20070056961A KR1020060116685A KR20060116685A KR20070056961A KR 20070056961 A KR20070056961 A KR 20070056961A KR 1020060116685 A KR1020060116685 A KR 1020060116685A KR 20060116685 A KR20060116685 A KR 20060116685A KR 20070056961 A KR20070056961 A KR 20070056961A
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South Korea
Prior art keywords
exhaust gas
turbocharger
gas turbine
supercharging system
shaft
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KR1020060116685A
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Korean (ko)
Inventor
죈겐 마트히아스
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맨 비앤드더블유 디젤 악티엔게젤샤프트
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Publication of KR20070056961A publication Critical patent/KR20070056961A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
    • F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
    • F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
    • F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
    • 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
    • F02B37/013—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust-driven pumps arranged in series
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F02B29/0412—Multiple heat exchangers arranged in parallel or in series
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/045—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly
    • F02B29/0475—Constructional details of the heat exchangers, e.g. pipes, plates, ribs, insulation, materials, or manufacturing and assembly the intake air cooler being combined with another device, e.g. heater, valve, compressor, filter or EGR cooler, or being assembled on a special engine location
    • 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
    • F02B37/004—Engines characterised by provision of pumps driven at least for part of the time by exhaust with exhaust drives arranged in series
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/04—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor
    • F02C3/107—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor with two or more rotors connected by power transmission
    • 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
    • F02B37/22—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits
    • 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
    • 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
    • F05D2250/00—Geometry
    • F05D2250/20—Three-dimensional
    • F05D2250/29—Three-dimensional machined; miscellaneous
    • F05D2250/291—Three-dimensional machined; miscellaneous hollowed
    • 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
    • F05D2250/00—Geometry
    • F05D2250/30—Arrangement of components
    • F05D2250/31—Arrangement of components according to the direction of their main axis or their axis of rotation
    • F05D2250/311—Arrangement of components according to the direction of their main axis or their axis of rotation the axes being in line
    • 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

Abstract

A two-stage supercharging system is provided to prevent the efficiency of a turbo supercharger from being lowered by generation of flow loss in a pipe. A two-stage supercharging system includes a first turbo supercharger(1) and a second turbo supercharger. The first turbo supercharger includes a first exhaust gas turbine(5) and a first compressor wheel. The first exhaust turbine is connected to a first shaft(3). The second turbo supercharger includes a second exhaust gas turbine(6) and a second compressor wheel(8). The second exhaust gas turbine is connected to a second shaft(4). The first exhaust gas turbine disposed outside and then the second exhaust gas turbine is connected to the exhaust gas.

Description

2단 과급 시스템{TWO-STAGE SUPERCHARGING SYSTEM}Two-stage supercharge system {TWO-STAGE SUPERCHARGING SYSTEM}

도 1은 본 발명의 제1 실시예에 따른 과급 시스템의 개략도.1 is a schematic diagram of a charging system according to a first embodiment of the present invention;

도 2는 본 발명의 제2 실시예에 따른 과급 시스템의 개략도.2 is a schematic diagram of a charging system according to a second embodiment of the present invention;

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

1, 2: 터보 과급기 3, 4: 샤프트1, 2: turbocharger 3, 4: shaft

5, 6: 배기 가스 터빈 7, 8: 압축기 휠5, 6: exhaust gas turbine 7, 8: compressor wheel

9: 구동부 10: 출력부9: drive unit 10: output unit

11: 안내 격자 12: 중간 냉각기11: guide grid 12: middle cooler

13: 급기 냉각기 14: 흡음기13: air supply cooler 14: sound absorber

15: 구동/출력부용 설치 공간 16: 냉각액 공급용 연결부15: Installation space for drive / output unit 16: Connection part for cooling liquid supply

본 발명은 일렬로 접속된 2개의 터보 과급기를 포함하는 과급 시스템에 관한 것이다.The present invention relates to a supercharging system comprising two turbochargers connected in series.

선행 기술에는 레이디얼 터보 과급기 및 축류 터보 과급기가 공지되어 있다. 축류 터보 과급기는 특히 비교적 큰 출력이 필요할 때 사용된다. 자동차 부문, 즉 레이디얼 터보 과급기의 사용 분야에서는, 내연기관의 전체 작동 구간에 걸쳐 최적의 효율을 얻기 위해 다수의 터보 과급기를 차례로 연결하는 것이 공지되어 있다. 즉, 내연기관의 부분 부하 시에도 급기를 내연기관에 양호하게 공급하기 위해, 저압 터보 과급기와 고압 터보 과급기를 조합해서 사용한다.In the prior art, radial turbochargers and axial turbochargers are known. Axial turbochargers are used especially when a relatively large power is required. In the automotive sector, ie the use of radial turbochargers, it is known to connect a number of turbochargers in turn in order to obtain optimum efficiency over the entire operating section of the internal combustion engine. That is, a low pressure turbocharger and a high pressure turbocharger are used in combination in order to supply air to the internal combustion engine well even at partial load of the internal combustion engine.

선행 기술에 공지된 일렬로 연결된 2개의 터보 과급기의 사용에 있어서의 단점은 터보 과급기들 사이의 관 연결을 위한 높은 배관 비용 및 큰 설치 공간이 요구된다는 것이다. 높은 배관 비용과 더불어 일렬로 연결된 터보 과급기의 효율은 낮아지는데, 그 이유는 배관에서 유동 손실이 발생하기 때문이다.A disadvantage of the use of two turbochargers connected in series known in the prior art is that high piping costs and large installation space are required for the pipe connection between the turbochargers. In addition to the high piping costs, the efficiency of the turbocharger in line is lowered because of the loss of flow in the piping.

본 발명의 목적은, 상기 선행 기술의 전술한 단점을 감안하여, 내연기관의 전체 작동 구간에 걸쳐 높은 효율로 작동하는 컴팩트한 터보 과급기 시스템을 제공하는 것이다.Summary of the Invention It is an object of the present invention to provide a compact turbocharger system that operates with high efficiency over the entire operating section of an internal combustion engine, in view of the above mentioned disadvantages of the prior art.

상기 목적은 본 발명의 독립 청구항 1에 의해 달성된다. 종속 청구항은 본 발명의 바람직한 실시예이다.This object is achieved by the independent claim 1 of the present invention. Dependent claims are preferred embodiments of the invention.

본 발명에 따라 2개의 통합된 터보 과급기를 구비한 과급 시스템이 제공된다. 각각의 터보 과급기는 그 샤프트에 배기 가스 터빈과 압축기 휠을 구비한다. 상기 과급기가 축류 과급기이기 때문에, 배기 가스 터빈은 축방향으로, 즉 샤프트에 대해 평행하게 관류된다. 2개의 터보 과급기의 샤프트들은 서로 동축으로 배치된다.According to the invention there is provided a charging system with two integrated turbochargers. Each turbocharger has an exhaust gas turbine and a compressor wheel on its shaft. Since the supercharger is an axial supercharger, the exhaust gas turbine flows axially, ie parallel to the shaft. The shafts of the two turbochargers are arranged coaxially with each other.

예컨대, 제1 샤프트를 중심으로 지지된 제2 중공 샤프트를 사용함으로써 구현될 수 있는, 샤프트들의 동축 배치에 의해, 설치 공간의 최적화가 가능하다. 상기 동축 배치에 의해, 터보 과급기들 사이에 추가적인 파이프가 필요하지 않기 때문에, 2개의 터보 과급기들 사이의 유동 손실이 최소화될 수 있다.Optimization of the installation space is possible by the coaxial arrangement of the shafts, which can be realized, for example, by using a second hollow shaft supported about the first shaft. By the coaxial arrangement, since no additional pipe is required between the turbochargers, the flow loss between the two turbochargers can be minimized.

본 발명의 바람직한 실시예에 따른 터보 과급기는, 우선 과급 시스템 내에서 좀 더 외측에 배치된 제1 배기 가스 터빈이, 그리고 이후에 좀 더 하우징 내측에 배치된 제2 배기 가스 터빈이 배기 가스로 관류되도록, 배기 가스 유동 내에 배치된다.The turbocharger according to a preferred embodiment of the present invention firstly flows into the exhaust gas by a first exhaust gas turbine disposed further outside in the supercharge system and then by a second exhaust gas turbine further arranged inside the housing. Preferably within the exhaust gas flow.

전술한 조치는 배기 가스 흐름을 공급하기 위한 배관 비용을 적게 유지시킬 수 있는데, 그 이유는 과급 시스템의 중심을 향할수록 필요한 공간이 커지기 때문이다. 즉, 내측에 배치된 배기 가스 터빈 앞에 외측에 배치된 배기 가스 터빈을 제공함으로써, 먼저 내측에 놓인 제2 배기 가스 터빈에 배기 가스를 제공하는 파이프가 생략될 수 있다. 상기 파이프는 형태가 복잡하고 큰 공간을 필요로 하기 때문에 불리하다. 또한, 전술한 조치에 의해 그리고 제안된 2단 과급 시스템의 컴팩트한 구성에 의해, 1단 과급 시스템을 대체하여 본 발명에 따른 과급 시스템을 내연기관에 설치하는 것이 가능하다.The above measures can keep piping costs for supplying the exhaust gas stream less because the space required increases towards the center of the supercharging system. That is, by providing the exhaust gas turbine disposed outside in front of the exhaust gas turbine disposed inside, the pipe for providing the exhaust gas to the second exhaust gas turbine first placed inside can be omitted. The pipe is disadvantageous because it is complicated in shape and requires a large space. In addition, by the above-described measures and by the compact construction of the proposed two-stage supercharging system, it is possible to replace the one-stage supercharging system and to install the supercharging system according to the present invention in the internal combustion engine.

본 발명의 다른 바람직한 실시예에 따라 2개의 터보 과급기 중 하나 또는 둘 모두에 구동부 및/또는 출력부가 설치된다.According to another preferred embodiment of the invention the drive and / or the output is installed in one or both of the two turbochargers.

내연기관에서 빠르게 부하 전환이 이루어지면, 부하 전환을 시작할 때 급기가 충분히 제공되지 않는다. 이에 따라, 이 단계에서는 구동부를 통해 하나 또는 2개의 터보 과급기의 샤프트가 구동됨으로써, 전술한 이른 시점에서 이미 급기가 충분히 제공되고 내연기관의 응답 특성이 개선된다. 따라서, 전술한 조치는 저압 및 고압 터보 과급기의 사용에 추가해서 이루어진다. 또한, 내연기관의 부분 부하 구간에서 카본블랙의 발생이 증가하는데, 그 이유는 부분 부하 구간에서 내연기관 내의 연소 과정이 최적으로 이루어지지 않기 때문이다. 전술한 문제를 해결하기 위해, 구동부가 사용됨으로써, 부분 부하 시에 내연기관의 방출값이 추가의 급기 공급에 의해 최적화된다.If the load change is made quickly in the internal combustion engine, there is not enough air supply at the start of the load change. Accordingly, in this step, the shafts of one or two turbochargers are driven through the drive unit, whereby sufficient air supply is already provided at the earlier point in time as described above, and the response characteristics of the internal combustion engine are improved. Thus, the foregoing measures are made in addition to the use of low and high pressure turbochargers. In addition, the generation of carbon black increases in the partial load section of the internal combustion engine because the combustion process in the internal combustion engine is not optimally performed in the partial load section. In order to solve the above-mentioned problem, by using a drive part, the emission value of the internal combustion engine at partial load is optimized by the additional air supply.

또한, 출력부를 과급 시스템의 하나 또는 2개의 샤프트에 설치하는 것이 바람직하다. 출력부는 구동부와 일체로 형성될 수 있다. 선행 기술에서는 초과량의 배기 가스가 바이패스를 통해 터보 과급기를 우회하도록 안내하기 위해 소위 "웨이스트 게이트(waste gate)"를 사용하는 것이 공지되어 있다. 출력부를 통해 상기 초과량의 배기 가스를 사용하는 것도 가능한데, 그 이유는 발생되는 만큼의 급기가 필요하지 않은 경우에 출력부가 연결되기 때문이다. 파워 출력 샤프트로서 터보 과급기 샤프트를 사용하면, 초과량의 배기 가스의 유동 에너지가 사용될 수 있다.It is also desirable to install the outputs on one or two shafts of the supercharging system. The output unit may be integrally formed with the driving unit. In the prior art it is known to use a so-called "waste gate" to guide the excess exhaust gas to bypass the turbocharger via a bypass. It is also possible to use the excess amount of exhaust gas through the output part, because the output part is connected when no air supply as much as is generated is required. By using the turbocharger shaft as the power output shaft, the excess energy flow energy of the exhaust gas can be used.

본 발명의 바람직한 실시예에 따라 배기 가스 터빈들 사이에는 안내 격자가 마련된다. 상기 안내 격자는 배기 가스 터빈들 사이의 유동 조건을 최적화하기 위해 사용된다. 이를 위해, 안내 격자의 소자들은 터보 과급기의 회전수에 따라 조절될 수 있다.According to a preferred embodiment of the present invention a guide grating is provided between the exhaust gas turbines. The guide grating is used to optimize the flow conditions between the exhaust gas turbines. To this end, the elements of the guide grid can be adjusted according to the speed of the turbocharger.

본 발명의 다른 실시예에 따라, 과급 시스템의 효율을 높이기 위해 저압 터보 과급기 및 고압 터보 과급기에 급기 냉각기가 설치된다. 즉, 중간 냉각기가 저 압 터보 과급기 다음에 배치된다. 대안으로서, 터보 과급기 중 단 하나에만 급기 냉각기가 설치될 수 있거나 또는 2개의 터보 과급기에 동일한 급기 냉각기가 사용될 수 있다.According to another embodiment of the present invention, an air supply cooler is installed in the low pressure turbocharger and the high pressure turbocharger to increase the efficiency of the charging system. That is, an intermediate cooler is placed after the low pressure turbocharger. Alternatively, only one of the turbochargers may be equipped with an air supply cooler or the same air supply cooler may be used for two turbochargers.

이하, 본 발명의 2가지의 실시예를 첨부한 도면을 참고로 구체적으로 설명한다.Hereinafter, two embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 배기 가스 터빈(5) 및 압축기 휠(7)이 배치된 제1 샤프트(3)를 구비한 제1 터보 과급기(1)를 도시한다. 제1 터보 과급기(1)는 고압 터보 과급기이고, 상기 배기 가스 터빈(5)은 비교적 작은 관성 모멘트가 배기가스 흐름에 대항하도록 하기 위해서 저압 터보 과급기에서 보다 더 크게 형성될 수 있다. 1단 터보 과급기에 비해 2개의 배기 가스 터빈(5, 6)의 직경이 더 작기 때문에, 배기 가스 터빈의 관성 모멘트는 1단 구성에 비해 더 작다.1 shows a first turbocharger 1 with an exhaust gas turbine 5 and a first shaft 3 on which a compressor wheel 7 is arranged. The first turbocharger 1 is a high pressure turbocharger and the exhaust gas turbine 5 can be made larger than in a low pressure turbocharger in order to allow a relatively small moment of inertia to counter the exhaust flow. Because the diameters of the two exhaust gas turbines 5, 6 are smaller than in the first stage turbocharger, the moment of inertia of the exhaust gas turbine is smaller than in the one stage configuration.

제2 터보 과급기(2)는 제2 배기 가스 터빈(6) 및 제2 압축기 휠(8)을 샤프트(4)의 단부에 각각 구비한다. 샤프트(4)는 중공 샤프트로서 형성되고 샤프트(3) 상에 지지된다. 이러한 구성에 의해, 전체적으로 컴팩트한 과급 시스템 구성이 가능하다. 배기 가스 터빈(5, 6) 사이에는 안내 격자(11)가 제공되고, 상기 안내 격자는 제2 배기 가스 터빈으로의 공기 흐름을 최적화하기 위해 제공된다. 제1 배기 가스 터빈(5)에 대해서 동일한 목적을 달성하기 위해, 안내 격자가 제1 배기 가스 터빈(5) 앞에도 설치될 수 있다. 회전수가 너무 낮은 경우에 샤프트를 구동시키거나 또는 회전수가 너무 높은 경우에 에너지 회수에 의해 샤프트를 제동하기 위해, 제1 샤프트(3)의 단부에는 조합식 구동부/출력부(9, 10)가 제공된다. 구동부 및 출력부는 중공 샤프트(4)에 대해서도 제공될 수 있으나, 구성 형태는 설치 공간(15) 내의 조건에 맞게 조정되어야 한다.The second turbocharger 2 has a second exhaust gas turbine 6 and a second compressor wheel 8 at the ends of the shaft 4, respectively. The shaft 4 is formed as a hollow shaft and supported on the shaft 3. This configuration enables a compact supercharge system configuration as a whole. A guide grating 11 is provided between the exhaust gas turbines 5, 6, which is provided to optimize the air flow to the second exhaust gas turbine. In order to achieve the same purpose for the first exhaust gas turbine 5, a guide grating may also be provided in front of the first exhaust gas turbine 5. Combination drives / outputs 9, 10 are provided at the ends of the first shaft 3 to drive the shaft if the rotational speed is too low or to brake the shaft by energy recovery if the rotational speed is too high. do. The drive and output may also be provided for the hollow shaft 4, but the configuration must be adapted to the conditions in the installation space 15.

압축기 휠(8)을 통해 흐르는 공기는 중간 냉각기(12)를 통해 흐른 다음, 고압 터보 과급기의 압축기 휠(7)에 공급된다. 고압 터보 과급기(1)의 압축기 휠(7)을 통해 흐른 다음, 급기는 후속 급기 냉각기(13)에서 냉각된다. 급기 냉각기(13)를 냉각시키기 위해, 냉각액 공급용 연결부(16)가 터보 과급기 하우징에 제공된다. 소음 방출을 줄이기 위해, 흡음기(14)가 터보 과급기 하우징에 설치된다.Air flowing through the compressor wheel 8 flows through the intermediate cooler 12 and is then supplied to the compressor wheel 7 of the high pressure turbocharger. After flowing through the compressor wheel 7 of the high pressure turbocharger 1, the air supply is cooled in a subsequent air supply cooler 13. In order to cool the air supply cooler 13, a connection portion 16 for supplying a coolant is provided in the turbocharger housing. To reduce noise emissions, a sound absorber 14 is installed in the turbocharger housing.

도 2는 본 발명의 제2 실시예를 도시한다. 과급 시스템의 구성 부품은 제1 실시예에 상응하는 도면 부호를 갖는다. 제2 실시예는 제1 터보 과급기(1)가 저압 터보 과급기를 형성하고, 과급 시스템 내에서 상기 제1 터보 과급기(1)에 비해 내부에 놓인 제2 터보 과급기(2)가 고압 터보 과급기로서 사용된다는 점이 제1 실시예와 다르다. 따라서, 중간 냉각기(12)가 제1 터보 과급기의 압축기 휠(7)에 설치되며 흡음기(14)가 더 이상 과급 시스템의 주변에 제공되지 않고 그 단부에 제공된다.2 shows a second embodiment of the present invention. The component parts of the supercharging system have reference numerals corresponding to those of the first embodiment. In the second embodiment, the first turbocharger 1 forms a low pressure turbocharger, and the second turbocharger 2 placed inside the turbocharger 1 in the charging system is used as a high pressure turbocharger. Is different from the first embodiment. Thus, an intermediate cooler 12 is installed in the compressor wheel 7 of the first turbocharger and the sound absorber 14 is no longer provided at the periphery of the supercharging system but at its end.

본 발명에 따르면, 내연기관의 전체 작동 구간에 걸쳐 높은 효율로 작동하는 컴팩트한 터보 과급기 시스템을 제공할 수 있다.According to the present invention, it is possible to provide a compact turbocharger system that operates with high efficiency over the entire operating section of an internal combustion engine.

Claims (10)

제1 샤프트(3) 상에 축 방향으로 관류되는 제1 배기 가스 터빈(5) 및 제1 압축기 휠(7)을 구비하는 제1 터보 과급기(1)와 제2 샤프트(4) 상에 축 방향으로 관류되는 제2 배기 가스 터빈(6) 및 제2 압축기 휠(8)을 구비하는 제2 터보 과급기를 포함하는 과급 시스템에 있어서, 상기 제1 및 상기 제2 샤프트(3, 4)가 동축으로 지지되는 것을 특징으로 하는 과급 시스템.An axial direction on the first turbocharger 1 and the second shaft 4 having a first exhaust gas turbine 5 and a first compressor wheel 7 axially flowing on the first shaft 3. A supercharging system comprising a second turbocharger having a second exhaust gas turbine 6 and a second compressor wheel 8 flowing through the system, wherein the first and the second shafts 3, 4 are coaxial. Supercharging system, characterized in that supported. 제1항에 있어서, 우선 과급 시스템 내에서 더 외측에 배치된 제1 배기 가스 터빈(5)이, 그리고 이후에 제2 배기 가스 터빈(6)이 배기 가스로 관류되는 것을 특징으로 하는 과급 시스템.2. The supercharging system according to claim 1, characterized in that firstly the first exhaust gas turbine (5) disposed further outside in the supercharging system, and then the second exhaust gas turbine (6) is perfused with the exhaust gas. 제1항 또는 제2항에 있어서, 상기 제1 및/또는 제2 터보 과급기(1, 2)에 구동부(9) 및/또는 출력부(10)가 설치되는 것을 특징으로 하는 과급 시스템.3. The supercharging system according to claim 1, wherein a drive part (9) and / or an output part (10) are provided in the first and / or second turbocharger (1, 2). 제1항 내지 제3항 중 어느 하나의 항에 있어서, 상기 제2 터보 과급기(2)의 제2 샤프트(4)가 중공 샤프트로서 형성되고 상기 제1 샤프트(3)를 중심으로 회전 가능하게 지지되는 것을 특징으로 하는 과급 시스템.4. The method according to claim 1, wherein the second shaft 4 of the second turbocharger 2 is formed as a hollow shaft and rotatably supported about the first shaft 3. Supercharging system, characterized in that. 제1항 내지 제4항 중 어느 하나의 항에 있어서, 상기 터보 과급기(1, 2) 중 하나는 고압 터보 과급기로, 그리고 다른 하나의 터보 과급기는 저압 터보 과급기로 형성되는 것을 특징으로 하는 과급 시스템.5. The supercharging system according to claim 1, wherein one of the turbochargers 1, 2 is formed as a high pressure turbocharger and the other turbocharger is formed as a low pressure turbocharger. 6. . 제1항 내지 제5항 중 어느 하나의 항에 있어서, 상기 배기 가스 터빈들(5, 6)사이의 공기 안내를 위한 안내 격자(11)가 상기 제1 배기 가스 터빈(5)과 상기 제2 배기 가스 터빈(6) 사이에 제공되는 것을 특징으로 하는 과급 시스템.6. The guide grating 11 for air guidance between the exhaust gas turbines 5, 6 is characterized in that the first exhaust gas turbine 5 and the second. Supercharge system, characterized in that provided between the exhaust gas turbine (6). 제6항에 있어서, 상기 안내 격자(11)의 형상은 회전수에 따라 조절될 수 있는 것을 특징으로 하는 과급 시스템.7. The supercharging system according to claim 6, wherein the shape of the guide grating (11) can be adjusted according to the number of revolutions. 제1항 내지 제7항 중 어느 하나의 항에 있어서, 상기 저압 터보 과급기의 상기 압축기 휠(7, 8) 다음에 하나의 급기 냉각기(13)가 및/또는 상기 고압 터보 과급기의 상기 압축기 휠(7, 8) 다음에 다른 하나의 급기 냉각기(13)가 제공되는 것을 특징으로 하는 과급 시스템. 8. The compressor wheel (7) according to claim 1, wherein one of the compressor wheels (7, 8) of the low pressure turbocharger is followed by one air cooler (13) and / or the compressor wheel of the high pressure turbocharger (8). 7, 8) A supercharge system, characterized in that there is then another air supply cooler (13). 제1항 내지 제8항 중 어느 하나의 항에 있어서, 상기 저압 터보 과급기의 상기 배기 가스 터빈(5, 6)의 직경은 상기 고압 터보 과급기의 상기 배기 가스 터빈(5, 6)의 직경보다 큰 것을 특징으로 하는 과급 시스템.The diameter of the exhaust gas turbines 5, 6 of the low pressure turbocharger is larger than the diameter of the exhaust gas turbines 5, 6 of the high pressure turbocharger. Supercharge system, characterized in that. 제1항 내지 제9항 중 어느 하나의 항에 있어서, 흡음기(14)가 상기 과급 시 스템에 제공되는 것을 특징을 하는 과급 시스템.10. The supercharging system according to claim 1, wherein a sound absorber is provided in the supercharging system. 11.
KR1020060116685A 2005-11-29 2006-11-24 Two-stage supercharging system KR20070056961A (en)

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