WO2019080330A1 - 一种双流道排气管与增压器的密封结构及发动机 - Google Patents
一种双流道排气管与增压器的密封结构及发动机Info
- Publication number
- WO2019080330A1 WO2019080330A1 PCT/CN2017/117411 CN2017117411W WO2019080330A1 WO 2019080330 A1 WO2019080330 A1 WO 2019080330A1 CN 2017117411 W CN2017117411 W CN 2017117411W WO 2019080330 A1 WO2019080330 A1 WO 2019080330A1
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- WIPO (PCT)
- Prior art keywords
- exhaust pipe
- sealing
- supercharger
- flange
- flow
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F11/00—Arrangements of sealings in combustion engines
Definitions
- the invention relates to the technical field of engine production, in particular to a sealing structure and an engine of a double-flow exhaust pipe and a supercharger.
- a diesel engine using a pulse-type supercharging system a connection point of the exhaust pipe outlet flange 04 and the supercharger 03, in order to prevent the two flow passages of the exhaust pipe 01 from collating with each other
- the gas leakage risk may be caused by the gas.
- the gasket 02 at the exhaust pipe flange 04 is also divided into a double flow passage, the separation position between the gasket 02 and the exhaust pipe outlet flange 04, and the supercharger method.
- the partition of the central part of the blue is corresponding to ensure the sealing of the outlet flange 04 of the exhaust pipe.
- One of the objects of the present invention is to provide a sealing structure of a double-flow exhaust pipe and a supercharger to avoid cross-flow between the exhaust passages of the exhaust pipe and ensure the connection position of the exhaust pipe flange and the supercharger flange. Sealing.
- Another object of the present invention is to provide an engine employing the above-described sealing structure.
- the sealing structure of the dual-flow exhaust pipe and the supercharger provided by the present invention comprises an exhaust pipe flange, a supercharger flange and a sealing gasket, and the opening of the sealing gasket is a single hole.
- One of the exhaust pipe flange and the supercharger flange is provided with a metal partitioning projection adapted to the thickness of the gasket, the metal partitioning projection being located at a separation of the two flow passages And separating the single hole of the gasket into two holes corresponding to the two flow paths.
- the metal partition protrusion is disposed on the exhaust pipe flange.
- the metal partitioning protrusion is integrally formed with the exhaust pipe flange.
- the side of the metal partitioning protrusion adjacent to the two of the flow channels is a curved surface.
- both ends of the metal partitioning protrusion are sealing surfaces matched with the sealing gasket, and the length of any one of the sealing surfaces is not less than 5 mm.
- the exhaust pipe flange, the supercharger flange and the gasket are fastened by bolts.
- one or both sides of the gasket are further provided with a sealing protrusion, and the sealing protrusion is annularly arranged along a circumferential direction of the single hole.
- the number of the sealing protrusions is one or more turns.
- the engine disclosed in the present invention includes the sealing structure of the dual-flow exhaust pipe and the supercharger disclosed in any of the above.
- the opening of the sealing gasket is designed as a single hole, the exhaust pipe flange and the supercharger method
- One of the blues is provided with a metal partitioning projection adapted to the thickness of the gasket.
- the metal partition protrusion is more resistant to high temperature than the gasket, and its high temperature creep variable is small, so the metal partition protrusion and the sealing gasket can ensure the tightness between the double-flow exhaust pipe and the supercharger. .
- the engine disclosed in the present invention adopts the above-mentioned double-flow exhaust pipe and the supercharger sealing structure, so the engine has the corresponding advantages of the above-mentioned sealing structure, which will not be described herein.
- FIG. 1 is a schematic exploded view of a sealing structure of a dual-flow exhaust pipe and a supercharger in the prior art
- FIG. 2 is a schematic structural view of a prior art exhaust pipe flange
- FIG. 3 is a schematic structural view of a gasket in the prior art
- FIG. 4 is a schematic structural view of an exhaust pipe flange disclosed in an embodiment of the present invention.
- FIG. 5 is a schematic structural view of a gasket according to an embodiment of the present invention.
- 1 is the exhaust pipe flange
- 2 is the metal partition protrusion
- 3 is the sealing gasket
- 4 is a single hole
- 21 is a sealing surface.
- One of the cores of the present invention is to provide a sealing structure of a double-flow exhaust pipe and a supercharger to avoid cross-flow between the two flow passages of the exhaust pipe and ensure the connection position of the exhaust pipe flange and the supercharger flange. Sealing.
- Another core of the present invention is to provide an engine employing the above described sealing structure.
- the exhaust pipe flange 1, the supercharger flange and the sealing gasket 3 are sealed.
- the opening of the gasket 3 is a single hole 4, and one of the exhaust pipe flange 1 and the supercharger flange is provided with a metal partition protrusion 2 adapted to the thickness of the gasket 3, and the metal partition protrusion 2 is located.
- the metal partitioning projection 2 divides the single hole 4 of the gasket 3 into two holes corresponding to the two flow paths.
- the thickness of the metal partitioning protrusion 2 and the sealing gasket 3 means that the height of the metal partitioning protrusion 2 should be consistent with the thickness of the pressed sealing gasket 3, thereby achieving metal partitioning convexity.
- the metal partitioning protrusion 2 Compared with the sealing gasket, the metal partitioning protrusion 2 has better high temperature resistance performance, and the creeping variable is small at a high temperature state, which effectively avoids the mutual flow between the two flow passages and ensures the double flow passage.
- the metal partition protrusion 2 may be disposed on any one of the exhaust pipe flange 1 or the supercharger flange, as shown in FIG. 4, in the embodiment of the invention, the metal partition protrusion 2 is specifically disposed in the exhaust Pipe flange 1 on.
- the metal partition protrusion 2 and the exhaust pipe flange 1 may be a unitary structure or a split structure. When the two are separated structures, the metal partition protrusion 2 can pass.
- the connecting member is connected to the exhaust pipe flange 1, but the sealing property between the metal partitioning protrusion 2 and the exhaust pipe flange 1 is required; when the two are in an integrated structure, the metal partitioning protrusion 2 can be casted. Or formed by machining.
- the metal partitioning protrusion 2 is further optimized in the embodiment, and the metal partitioning protrusion 2 and the two flow paths are combined.
- the sides of the adjacent sides are all curved surfaces, which are adapted to the overall shape of the flow path to avoid the occurrence of blocking exhaust gas flow.
- Both ends of the metal partition protrusion 2 are sealing faces that cooperate with the gasket, and the length of any one of the sealing faces should not be less than 5 mm to ensure a sealing effect.
- the exhaust pipe flange 1, the supercharger and the gasket 3 are fastened together by bolts, and one or both sides of the gasket 3 are provided with sealing protrusions, and the sealing protrusions are along the circumference of the single hole 4.
- the sealing is arranged in a ring shape, and the sealing protrusion can increase the compression amount of the sealing gasket 3, and improve the pre-tightening force of the sealing gasket 3, thereby further improving the sealing effect.
- the number of the sealing projections is not limited, and the number of the sealing projections may be one or more turns depending on the actual size of the gasket 3.
- the engine disclosed in the present invention employs the sealing structure of the dual-flow exhaust pipe and the supercharger disclosed in any of the above.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
- Exhaust Silencers (AREA)
Abstract
一种双流道排气管与增压器的密封结构,包括排气管法兰(1)、增压器法兰以及密封垫片,密封垫片的开孔为单孔,排气管法兰(1)和增压器法兰中的一者设置有与密封垫厚度适配的金属隔断凸起(2),金属隔断凸起(2)位于两个流道的分隔处,并将密封垫片的单孔分隔为与两个流道相对应的双孔。金属隔断凸起(2)相比于密封垫片而言更耐高温,其高温蠕变量小。还涉及一种采用该密封结构的发动机。
Description
本申请要求于2017年10月25日提交中国专利局、申请号为201711010715.5、发明名称为“一种双流道排气管与增压器的密封结构及发动机”,以及于2017年10月25日提交中国专利局、申请号为201721384677.5、发明名称为“一种双流道排气管与增压器的密封结构及发动机”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本发明涉及发动机生产技术领域,特别涉及一种双流道排气管与增压器的密封结构及发动机。
如图1至图3中所示,目前,采用脉冲式增压***的柴油机,排气管出口法兰04与增压器03连接处,为了防止排气管01两个流道气体间相互串气可能引起的漏气风险,一般将排气管法兰04处的密封垫片02也分隔为双流道,密封垫片02中间的分隔位置与排气管出口法兰04、以及增压器法兰中部的隔断相对应,以保证排气管出口法兰04位置的密封性。
然而,随着发动机后处理对排放温度要求的升高,排气管出口法兰04处热变形会相应增大,对于密封垫片02分隔双流道的结构来说,高温下的密封垫片02容易产生蠕变,这导致双流道之间的串气量增大,并且一旦出现串气,高温排气会对密封垫片02中部隔断位置持续冲刷,最终引起严重的排气泄漏。
因此,如何有效避免排气管双流道之间串气是目前本领域技术人员亟需解决的技术问题。
发明内容
本发明的目的之一是提供一种双流道排气管与增压器的密封结构,以避免排气管双流道之间串气,保证排气管法兰与增压器法兰连接位置的密封性。
本发明的另一目的是提供一种采用上述密封结构的发动机。
为达到上述目的,本发明提供的双流道排气管与增压器的密封结构,包括排气管法兰、增压器法兰以及密封垫片,所述密封垫片的开孔为单孔,所述排 气管法兰和所述增压器法兰中的一者设置有与所述密封垫厚度适配的金属隔断凸起,所述金属隔断凸起位于两个流道的分隔处,并将所述密封垫的单孔分隔为与两个流道相对应的双孔。
优选的,所述金属隔断凸起设置在所述排气管法兰上。
优选的,所述金属隔断凸起与所述排气管法兰为一体式结构。
优选的,所述金属隔断凸起与两个所述流道相邻的侧面为弧面。
优选的,所述金属隔断凸起两端为与所述密封垫片配合的密封面,且任意一所述密封面的长度不小于5mm。
优选的,所述排气管法兰、增压器法兰以及密封垫片通过螺栓紧固。
优选的,所述密封垫片的一侧或两侧还设置有密封凸起,且所述密封凸起沿所述单孔的周向呈环状设置。
优选的,所述密封凸起的数量为一圈或多圈。
本发明中所公开的发动机,包括上述任意一项中所公开的双流道排气管与增压器的密封结构。
由以上技术方案可以看出,本发明中所公开的双流道排气管与增压器的密封结构中,密封垫片的开孔被设计为单孔,排气管法兰和增压器法兰中的一者上设置有与密封垫厚度适配的金属隔断凸起,在排气管法兰、增压器法兰以及密封垫完成安装后,金属隔断凸起将密封垫片的单孔分隔为与两个流道相对应的双孔。
金属隔断凸起相比于密封垫片而言更耐高温,其高温蠕变量小,因此金属隔断凸起与密封垫片的配合可以保证双流道排气管与增压器之间的密封性。
本发明中所公开的发动机由于采用了上述双流道排气管与增压器的密封结构,因此该发动机兼具上述密封结构的相应优点,本文中对此不再进行赘述。
图1为现有技术中双流道排气管与增压器的密封结构的***结构示意图;
图2为现有技术中排气管法兰的结构示意图;
图3为现有技术中密封垫片的结构示意图;
图4为本发明实施例中所公开的排气管法兰的结构示意图;
图5为本发明实施例中所公开的密封垫片的结构示意图。
其中,1为排气管法兰,2为金属隔断凸起,3为密封垫片,4为单孔,21为密封面。
本发明的核心之一是提供一种双流道排气管与增压器的密封结构,以避免排气管双流道之间串气,保证排气管法兰与增压器法兰连接位置的密封性。
本发明的另一核心是提供一种采用上述密封结构的发动机。
为了使本技术领域的人员更好地理解本发明方案,下面结合附图和具体实施方式对本发明作进一步的详细说明。
请结合图4和图5,本发明实施例中所公开的双流道排气管与增压器的密封结构中,包括排气管法兰1、增压器法兰以及密封垫片3,密封垫片3的开孔为单孔4,排气管法兰1和增压器法兰中的一者设置有与密封垫片3厚度适配的金属隔断凸起2,金属隔断凸起2位于两个流道的分隔处,如图4中所示,金属隔断凸起2将密封垫片3的单孔4分隔为与两个流道相对应的双孔。
需要进行说明的是,所述金属隔断凸起2与密封垫片3厚度适配是指:金属隔断凸起2的高度应当与压紧后的密封垫片3的厚度一致,从而达到金属隔断凸起2与密封垫片3的理想配合效果。
相比于密封垫片而言,金属隔断凸起2的耐高温性能更加优异,在高温状态下,其蠕变量较小,这就有效避免了双流道之间相互串气,保证了双流道排气管与增压器之间的密封性。
金属隔断凸起2可以设置在排气管法兰1或增压器法兰中的任意一者上,如图4中所示,本发明实施例中,金属隔断凸起2具体设置在排气管法兰1上。
本领域技术人员可以理解的是,金属隔断凸起2与排气管法兰1可以为一体式结构,也可为分体式结构,当两者为分体式结构时,金属隔断凸起2可通过连接件连接于排气管法兰1上,但需保证金属隔断凸起2与排气管法兰1之间的密封性;当两者为一体式结构时,金属隔断凸起2可以通过铸造或机加工的方式形成。
请参考图4,为了避免金属隔断凸起2对排气管的排气造成阻滞,本实施例中对金属隔断凸起2做出了进一步优化,金属隔断凸起2与两个流道相邻的侧面均为弧面,该弧面与流道的整体形状相适应,以避免出现阻挡排气气流的情况。金属隔断凸起2的两端为与密封垫相配合的密封面,并且任意一个密封面的长度不应当小于5mm,以保证密封效果。
优选的,排气管法兰1、增压器以及密封垫片3通过螺栓紧固在一起,密封垫片3的一侧或两侧设置有密封凸起,密封凸起沿单孔4的周向呈环状布置,密封凸起可增大密封垫片3的压缩量,提高密封垫片3的预紧力,从而进一步提高密封效果。密封凸起的数量不受限制,根据密封垫片3的实际大小,密封凸起的数量可以为一圈或多圈。
本发明中所公开的发动机,采用了上述任意一项中所公开的双流道排气管与增压器的密封结构。
由于采用了上述密封结构,因此该发动机具有上述密封结构相应的优点,本文中对此不再进行赘述。
以上对本发明所提供的发动机及双流道排气管与增压器的密封结构进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以对本发明进行若干改进和修饰,这些改进和修饰也落入本发明权利要求的保护范围内。
Claims (9)
- 一种双流道排气管与增压器的密封结构,包括排气管法兰(1)、增压器法兰以及密封垫片(3),其特征在于,所述密封垫片(3)的开孔为单孔(4),所述排气管法兰(1)和所述增压器法兰中的一者设置有与所述密封垫片(3)厚度适配的金属隔断凸起(2),所述金属隔断凸起(2)位于两个流道的分隔处,并将所述密封垫片(3)的单孔分隔为与两个流道相对应的双孔。
- 根据权利要求1所述的双流道排气管与增压器的密封结构,其特征在于,所述金属隔断凸起(2)设置在所述排气管法兰(1)上。
- 根据权利要求2所述的双流道排气管与增压器的密封结构,其特征在于,所述金属隔断凸起(2)与所述排气管法兰(1)为一体式结构。
- 根据权利要求1所述的双流道排气管与增压器的密封结构,其特征在于,所述金属隔断凸起(2)与两个所述流道相邻的侧面为弧面。
- 根据权利要求4所述的双流道排气管与增压器的密封结构,其特征在于,所述金属隔断凸起(2)两端为与所述密封垫片(3)配合的密封面(21),且任意一所述密封面(21)的长度不小于5mm。
- 根据权利要求1所述的双流道排气管与增压器的密封结构,其特征在于,所述排气管法兰(1)、增压器法兰以及密封垫片(3)通过螺栓紧固。
- 根据权利要求1所述的双流道排气管与增压器的密封结构,其特征在于,所述密封垫片(3)的一侧或两侧还设置有密封凸起,且所述密封凸起沿所述单孔(4)的周向呈环状设置。
- 根据权利要求7所述的双流道排气管与增压器的密封结构,其特征在于,所述密封凸起的数量为一圈或多圈。
- 一种发动机,其特征在于,包括如权利要求1-8任意一项所述的双流道排气管与增压器的密封结构。
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CN201711010715.5A CN107620624B (zh) | 2017-10-25 | 2017-10-25 | 一种双流道排气管与增压器的密封结构及发动机 |
CN201721384677.5U CN207470273U (zh) | 2017-10-25 | 2017-10-25 | 一种双流道排气管与增压器的密封结构及发动机 |
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EP0172401A1 (de) * | 1984-07-27 | 1986-02-26 | Witzenmann GmbH Metallschlauch-Fabrik Pforzheim | Verbindung für mehrflutige Leitungen |
CN1432720A (zh) * | 2002-01-17 | 2003-07-30 | 日产自动车株式会社 | 内燃机的排气装置 |
US20030182937A1 (en) * | 2002-03-27 | 2003-10-02 | Yumex Corporation | Structure of an exhaust manifold branch collecting portion |
DE102009043117A1 (de) * | 2009-09-25 | 2011-03-31 | Daimler Ag | Dichtungsanordnung |
CN104234809A (zh) * | 2013-06-18 | 2014-12-24 | 埃贝斯佩歇废气技术合资公司 | 气隙绝缘的排气歧管 |
WO2016200312A1 (en) * | 2015-06-11 | 2016-12-15 | Scania Cv Ab | Turbo-charged internal combustion engine |
CN105697118A (zh) * | 2016-01-26 | 2016-06-22 | 重庆长安汽车股份有限公司 | 一种增压直喷发动机排气***的密封结构 |
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