• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A thin-walled pipe (11) is fastened inside the liquid-cooled envelope (13) by screws (16) distributed around the circumference of the pipe (11) in a cross-sectional plane. The screws (16) are lodged in carriers (17) arranged in the wall of the pipe (11) which have an internal screw-thread that mates with the screws (16). In the mounted position, a radial undersize is present in the region of each carrier (17) between the pipe (11) and the envelope (13), which is compensated when the screws (16) are tightened. For this purpose, the pipe (11) is distorted in the cross sectional plane of the screws (16) in the sections between the carriers (17). The size of the distortion is of the order of the thermal expansion of the pipe (11) to be expected at the operating temperature. This prevents constraining forces due to restricted thermal expansion from arising in the hot-pipe (11) during operation.
    公开号:SU1766274A3
    申请号:SU894614201
    申请日:1989-06-07
    公开日:1992-09-30
    发明作者:Зудманнс Ханс
    申请人:Мту Моторен-Унд Турбинен-Унион Фридрихсхафен Гмбх (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to engine-building, in particular to exhaust systems of internal combustion engines.
    A pipeline 1 is known that directs hot gases and has several flange-shaped supports distributed along the length and located on each longitudinal side of the thin-walled pipeline. The supports lie on the corresponding flange surface of the fluid-cooled housing. The pipeline is fastened with screws inserted perpendicular to the flange surface.
    The high temperatures of hot gases that occur during operation lead to significant differences in thermal expansion between the pipeline and the casing, which are only partially compensated by the fastening. Non-compensable thermal expansions result in forced compressive forces resulting in unrecorded material loads. The compressive forces applied to the internal combustion engine, such as vibrations and gas pulsations, are not affected by the resulting compressive forces.
    Also known exhaust pipe engine internal combustion 2, made of thin-walled and surrounded by a gas-tight casing, cooled by a liquid, the pipeline is located
    VI
    Oh oh
    ,Yu
    X |

     with
    at a distance from the casing and fixed on it only in one plane of the cross section, remaining free at the points of attachment, the fixing points are located around the circumference with asymmetrical distribution and the fastening means are in the form of screws included in the wrench in the projections of the fastening means.
    The design flaws are the presence of uncompensated thermal stresses arising from engine operation.
    Therefore, it is an object of the invention to provide a conduit directing the hot gases of an internal combustion engine and providing a reliable connection between the flame tube and the fluid-cooled housing.
    This problem is solved as follows. After installing the flame tube in the shell, the wall sections between the struts, at least in the zones on both sides of the cross-sectional plane of the screws, are deformed due to tensile stresses. The deformation has a magnitude of the order of thermal expansion expected at the operating temperature. The deformation of the flame tube produced in a cold state decreases with heating, and the tensile stresses decrease. To a certain extent, the programmed thermal expansion of the flame tube prevents the risk of uncalculated material loads due to forced forces.
    The advantages attained here are, in particular, that the production of pipeline deformations is forced when mounting fasteners are installed, that fasteners can be controlled externally, that the understated size that warps the flame tube can be unambiguously measured during installation, which ensures favorable at the cost of production of pipeline fixing.
    FIG. 1 shows a longitudinal section of the exhaust pipe; in fig. 2 is a cross-section of the exhaust pipe in the plane of fastening; in fig. 3 is a longitudinal section through the fixing of the flame tube with a clamping ring; in fig. 4 is a cross-sectional view of the mounting of the flame tube with a clamping ring; in fig. 5 shows a variant of fastening the flame tube to the walls of the casing; in fig. 6 is a cross-section in the attachment plane of FIG. five.
    The exhaust pipe of an internal combustion engine contains a thin-walled flame tube 1 and enclosing it with
    gap casing 2, cooled by a liquid. One end 3 of the exhaust pipe connected to the exhaust manifold 4, and the other docked to the turbine 5, working on the exhaust gases. The heat pipe 1 is connected to the casing 2 at the end 3 of the exhaust pipe with the help of four screws 6 located radially and in the same plane of the transverse section and entering the nut threads at the fixing points of the fire pipe 1, whose walls are made in the form of thickenings 7.
    In the initial state of installation, when the heat pipe 1 is inserted into the casing 2, each thickening 7 has an underestimated radial size compared to the size of the casing 2. When tightening the screws 6 included in the nut threads of the thickenings 7, the heat - pipe 1 is deformed and attracted to
    0 the casing 2. Here, the initially changed radial clearance is selected, and the heat pipe 1 is deformed to form the contour shown in FIG. 2 solid lines. The radial clearance is set in such a way that the deformation of the flame tube 1 is established, the order of magnitude of which is equal to the thermal expansion expected at the working temperature of the flame tube 1 and
    0 compensates for the stresses caused by the deformation of the flame tube 1 during installation. The walls of the flame tube 1 between the thickenings 7 in this case accept the contour shown by the dash-dotted line in FIG. 2
    5 The uneven circumferential arrangement of the bulges 7 is shown in FIG. 6. This arrangement of the bulges 7 improves the vibration characteristics of the flame tube, since the lengths of the walls of the flame tube 1 that are not the same between the bulges 7 have different natural frequencies, therefore the vibrations of the flame tube 1 excited by the pulsating flow of exhaust gases cannot increase to
    5 threatening resonant values.
    FIG. 3 and 4 shows a variant of the exhaust pipe, which is made with a composite flue pipe 1 in the form of a smooth-wall flow part and placed inside the flow part of the clamping ring 8. The fire tube 1 is fixed to the casing 2 by means of two transverse section screws arranged radially in one plane b which
    5 are located approximately in the middle of the length of the flame tube 1. The clamping ring 8 is provided at the fixing points with thickenings 7 with a wrench in them. For a more reliable fastening of the flame tube 1, notches 9 are made in the casing 2,
    corresponding to the size of the bulges 7, each notch 9 being provided with two shelves 10 and 11, by means of which the heat pipe 1 is fixed in the axial direction.
    权利要求:
    Claims (3)
    [1]
    Claim 1. The exhaust pipe of an internal combustion engine containing a thin-walled flame tube and covering it with a gap, cooled by a liquid, with the flame tube at least in one place of its surface attached to the casing using fasteners made in the form of screws included in the fastening points in the female thread, characterized in that, for the purpose of increasing
    five
    No reliability, the fastening points of the screws are made in the form of a thickening of the walls of the flame tube in a plane perpendicular to its axis.
    [2]
    2. Pipeline according to claim. 2 wherein the heat pipe is made integral in the form of a flow-through part and a clamping ring placed inside the flow-through part, and the fixing points of the screws in the form of bulges are made in the walls of the clamping ring.
    [3]
    3. Pipeline on PP. 1 and 2, characterized in that the angular distances between the fasteners are of different sizes.
    Fig.z
    FIG. B
    FIG. five
    6
    类似技术:
    公开号 | 公开日 | 专利标题
    RU2347978C2|2009-02-27|Combustion chamber that contains flexible connection between head and wall of chamber
    EP0318312A1|1989-05-31|Aperture insert for the combustion chamber of a gas turbine
    US6619915B1|2003-09-16|Thermally free aft frame for a transition duct
    US4147467A|1979-04-03|Exhaust gas turbocharger
    EP0761939A1|1997-03-12|Manifold converter
    JP4097994B2|2008-06-11|Joint for two-part CMC combustion chamber
    US6604358B2|2003-08-12|Exhaust manifold
    US6116013A|2000-09-12|Bolted gas turbine combustor transition coupling
    JP3150738B2|2001-03-26|Composite connector and air tube for combustion chamber wall of turbomachine
    US20060260292A1|2006-11-23|Gas turbine exhaust diffuser
    SU1766274A3|1992-09-30|Internal-combustion engine exhaust pipe
    US4205527A|1980-06-03|Exhaust manifold
    US3001366A|1961-09-26|Combustion chamber crossover tube
    US3263424A|1966-08-02|Turbine-compressor unit
    US10180105B2|2019-01-15|Adjustable cable for exhaust duct liner hanger
    KR920007667B1|1992-09-14|Exhaust gas line for a super charged multi-cylinder pistion internal combustion engine
    US2678529A|1954-05-18|Exhaust gas manifold for internalcombustion engines
    RU2104398C1|1998-02-10|Gas outlet pipeline
    SU1701118A3|1991-12-23|Improvement of engine exhaust system
    JP2678046B2|1997-11-17|Heat exchanger
    US4262487A|1981-04-21|Double wall combustion chamber for a combustion turbine
    US5658024A|1997-08-19|Expansion joint with a sloped cavity and improved fabric clamping
    US5056310A|1991-10-15|Exhaust pipe for a multi-cylinder piston internal-combustion engine
    US4117674A|1978-10-03|Engine and reactor connection system
    US5189879A|1993-03-02|Exhaust gas line for an internal-combustion engine and its method of manufacture
    同族专利:
    公开号 | 公开日
    DE3743851C1|1989-05-03|
    JPH0411726B2|1992-03-02|
    EP0348451A1|1990-01-03|
    KR930011562B1|1993-12-11|
    US5022227A|1991-06-11|
    CN1009124B|1990-08-08|
    CN1034606A|1989-08-09|
    EP0348451B1|1992-01-22|
    DE3868059D1|1992-03-05|
    WO1989005911A1|1989-06-29|
    KR900700748A|1990-08-16|
    JPH02502470A|1990-08-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE926578C|1952-04-13|1955-04-21|Bayerische Motoren Werke Ag|Device for preventing the start-up of chrome-plated exhaust pipes for internal combustion engines, especially for motorcycles|
    US3908369A|1974-05-06|1975-09-30|Clark Equipment Co|Turbo-supercharger exhaust|
    DE2602434A1|1976-01-23|1977-07-28|Daimler Benz Ag|Sheet metal lining for engine inlet and exhaust ducts - is preformed as two half shells and inserted in mould when casting cylinder head|
    US4086763A|1976-04-13|1978-05-02|Fuji Jukogyo Kabushiki Kaisha|Thermal reactor system for internal combustion engine|
    US4197704A|1976-06-11|1980-04-15|Honda Giken Kogyo Kabushiki Kaisha|Exhaust manifold for internal combustion engine|
    DE2744964A1|1977-10-06|1979-04-19|Kloeckner Humboldt Deutz Ag|EXHAUST GAS PIPE SYSTEM FOR MULTICYLINDRICAL PISTON ENGINE|
    DE8013256U1|1980-05-16|1986-10-02|Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen|Exhaust manifold for internal combustion engines with several cylinders|
    US4430856A|1981-11-13|1984-02-14|Deere & Company|Port liner and method of assembly|
    DE3635478C1|1986-10-18|1988-02-11|Mtu Friedrichshafen Gmbh|Exhaust pipe for a charged, multi-cylinder internal combustion engine|DE4021326C1|1990-07-04|1991-09-05|Mtu Friedrichshafen Gmbh|
    DE4229467A1|1992-09-03|1994-03-10|Mtu Friedrichshafen Gmbh|Storage device for the exhaust manifold of an internal combustion engine|
    US5408828A|1993-12-10|1995-04-25|General Motors Corporation|Integral cast diffuser for a catalytic converter|
    AT413130B|2003-09-23|2005-11-15|Ge Jenbacher Ag|Internal combustion engine|
    CN102943716A|2012-11-29|2013-02-27|河南创世电机科技有限公司|High-power cylinder cover for universal small gasoline engine|
    AT522795B1|2019-10-07|2021-02-15|Avl List Gmbh|CYLINDER HEAD OF AN COMBUSTION ENGINE|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3743851A|DE3743851C1|1987-12-23|1987-12-23|Exhaust pipe for an internal combustion engine|
    [返回顶部]