CN210013747U - Sealed exhaust manifold for medium and heavy diesel engine - Google Patents
Sealed exhaust manifold for medium and heavy diesel engine Download PDFInfo
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- CN210013747U CN210013747U CN201920993233.4U CN201920993233U CN210013747U CN 210013747 U CN210013747 U CN 210013747U CN 201920993233 U CN201920993233 U CN 201920993233U CN 210013747 U CN210013747 U CN 210013747U
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Abstract
The utility model relates to an exhaust manifold, specific sealed exhaust manifold for well heavy diesel engine that says so belongs to well heavy diesel engine exhaust system technical field. The corrugated pipe comprises an exhaust manifold front section, an exhaust manifold middle section, an exhaust manifold rear section and a corrugated pipe, wherein the flange end face of the middle section manifold of the exhaust manifold middle section is connected with the flange end face of the corrugated pipe through a flange connector, and the welding end face of the front section manifold of the exhaust manifold front section and the welding end face of the rear section manifold of the exhaust manifold rear section are welded and connected with the welding end face of the corrugated pipe. The utility model discloses the welding of exhaust manifold anterior segment and exhaust manifold back end and exhaust manifold bellows forms two inseparable subassemblies together, constitutes entire system with the exhaust manifold middle section, can install respectively and dismantle, the packing, the transportation and the storage of blast pipe of being convenient for; the whole part does not need to be replaced under the condition that individual parts are damaged, and the use cost is reduced.
Description
Technical Field
The utility model relates to an exhaust manifold, specific sealed exhaust manifold for well heavy diesel engine that says so belongs to well heavy diesel engine exhaust system technical field.
Background
Exhaust manifolds are important components of diesel engines and are typically cast from vermicular or nodular cast iron. Its main function is to guide exhaust from the exhaust duct to the exhaust manifold, contain the exhaust and guide the exhaust to the supercharger. The exhaust manifold also plays a role of fixedly supporting components such as a supercharger, a heat shield plate, and an EGR cooler.
Because the engine waste gas flows through the exhaust manifold, the working temperature difference is extremely large and is-60-750 ℃. This temperature difference is further increased as emission and fuel consumption regulations increase. Under the condition, the exhaust manifold of the engine is subjected to thermal shock of over 800 ℃ once when the engine is heated and cooled alternately. When the engine works from cold to hot, the exhaust manifold is gradually stretched, the exhaust manifold is subjected to compressive stress under the constraint force of the fastening bolts, the exhaust manifold is shortened in the cooling process of the engine, and the exhaust manifold is subjected to tensile stress under the constraint force of the fastening bolts. The exhaust manifold is prone to low cycle fatigue cracking under alternating cold and hot engine impacts.
At present, the common technical scheme for solving the fracture of the exhaust manifold is the exhaust manifold segmentation and elastic ring sealing technology, and the scheme has the defects that the air leakage phenomenon is generated at the initial stage of the operation of an engine and is more serious along with the lengthening of time. Meanwhile, patent document (CN 201620083454.4) discloses an exhaust manifold, in which two adjacent exhaust manifolds are connected by a bellows. The technical scheme has the defects that the sealing between the exhaust manifolds is completely born by the corrugated pipe, higher requirements are put on the strength of the corrugated pipe, and particularly the reliability of the corrugated pipe is low for high back pressure and high temperature waste gas of a large-discharge diesel engine in the VI country and high vibration in the operation of the engine, so that the service life of the exhaust manifolds is influenced. Meanwhile, for the diesel engine with large discharge capacity in the country VI, the space of the exhaust side is particularly compact, and the process of disassembling and replacing the exhaust manifold is complex and consumes long time.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned weak point to a well heavy diesel engine is with sealed exhaust manifold is provided, the form installation convenient to use that adopts the bellows to connect has improved the sealing reliability greatly, has improved life.
According to the technical scheme provided by the utility model, a well heavy diesel engine is with sealed exhaust manifold includes exhaust manifold anterior segment, exhaust manifold middle section, exhaust manifold back end and bellows, characterized by: the front section of the exhaust manifold and the rear section of the exhaust manifold are respectively provided with a front section manifold welding end face and a rear section manifold welding end face facing one end of the middle section of the exhaust manifold, the two ends of the corrugated pipe are respectively provided with a corrugated pipe flange end face and a corrugated pipe welding end face, the front end and the rear end of the middle section of the exhaust manifold are respectively provided with a middle section manifold flange end face, and the manifold flange end faces of the front end and the rear end of the middle section of the exhaust manifold are respectively connected with the front section of the exhaust; the end face of a middle manifold flange of the middle section of the exhaust manifold is connected with the end face of a corrugated pipe flange of the corrugated pipe through a flange connector, and the welding end face of a front section manifold of the front section of the exhaust manifold and the welding end face of a rear section manifold of the rear section of the exhaust manifold are connected with the welding end face of the corrugated pipe in a welding mode.
Furthermore, the outer surface of the corrugated pipe is provided with a metal woven net.
Furthermore, the inner sides of the front end and the rear end of the middle section of the exhaust manifold are respectively provided with an annular groove hole, the front section of the exhaust manifold and the rear section of the exhaust manifold face one end of the middle section of the exhaust manifold and are respectively provided with a front air guide pipe and a rear air guide pipe, the front air guide pipe and the rear air guide pipe respectively extend into the annular groove holes at the front end and the rear end of the middle section of the exhaust manifold, and a certain gap is arranged between the front end surface and the annular.
Furthermore, a positioning ring groove is arranged in an inner cavity of the end face of the corrugated pipe flange of the corrugated pipe, a positioning step is arranged at the front end of the end face of the middle-section manifold flange of the middle section of the exhaust manifold, the positioning step of the middle section of the exhaust manifold extends into the positioning ring groove of the corrugated pipe, and a U-shaped sealing ring is arranged between the front end face of the positioning step and the bottom end face of the positioning ring groove.
Compared with the prior art, the utility model has the advantages that:
the utility model has simple, compact and reasonable structure, the corrugated pipe of the utility model is connected with the front section of the exhaust manifold and the rear section of the exhaust manifold by welding, which belongs to rigid connection and has reliable sealing; the corrugated pipe is connected with the middle section of the exhaust manifold by adopting a flange connector, and the corrugated pipe belongs to rigid connection and is reliable in sealing; the corrugated pipe has elastic deformation capacity and is used for compensating displacement deviation caused by expansion with heat and contraction with cold of the exhaust manifold. The gas guide pipes arranged on the front section and the rear section of the exhaust manifold smoothly guide the waste gas into the middle section of the exhaust manifold, so that the high-temperature waste gas is prevented from directly scouring the corrugated pipe; high-temperature waste gas is blocked by the U-shaped sealing ring, so that the service life of the corrugated pipe is prolonged; compared with single-layer metal corrugation, the metal corrugated pipe with the inner and outer double-layer structure divides a metal pipe forming weld joint into two parts and is oppositely arranged, so that the elasticity is better, and the risk of cracking of the forming weld joint is reduced; the metal woven mesh is sleeved outside the corrugated pipe to protect the corrugated pipe, prevent collision damage, generate a damping vibration attenuation effect and improve the heat dissipation capacity, greatly prolong the service life of the corrugated pipe and ensure the reliability of the exhaust manifold; meanwhile, the front section and the rear section of the exhaust manifold are welded with the corrugated pipe of the exhaust manifold to form two non-detachable subassemblies, and the two subassemblies and the middle section of the exhaust manifold form a whole system which can be respectively installed and disassembled, so that the exhaust pipe is convenient to package, transport and store; the whole part does not need to be replaced under the condition that individual parts are damaged, and the use cost is reduced.
Drawings
Fig. 1 is a front view of the present invention.
FIG. 2 is a front view of a mid-section of an exhaust manifold.
FIG. 3 is a front view of a front section of an exhaust manifold.
Fig. 4 is a front view of the rear section of the exhaust manifold.
Fig. 5 is a front view of the bellows.
Fig. 6 is a sectional view of a connecting structure of a middle section of an exhaust manifold and a rear section of the exhaust manifold.
Description of reference numerals: 1-front section of an exhaust manifold, 2-middle section of the exhaust manifold, 3-rear section of the exhaust manifold, 4-bellows, 5-end face of a bellows flange, 6-end face of a bellows welding joint, 7-metal woven net, 8-flange connector, 9-front section manifold welding end face, 10-end face of a middle section manifold flange, 11-rear section manifold welding end face, 12-annular groove hole, 13-front gas guide pipe, 14-rear gas guide pipe, 15-positioning ring groove, 16-positioning step and 17-U-shaped sealing ring.
Detailed Description
The invention will be further described with reference to the embodiments shown in the drawings to which:
as shown in fig. 1-6, the present invention mainly comprises an exhaust manifold front section 1, an exhaust manifold middle section 2, an exhaust manifold rear section 3 and a bellows 4.
And a front section manifold welding end surface 9 and a rear section manifold welding end surface 11 are respectively arranged at one end of the front section 1 of the exhaust manifold and one end of the rear section 3 of the exhaust manifold, which face the middle section 2 of the exhaust manifold.
Bellows 4 both ends are equipped with bellows flange terminal surface 5 and bellows welding terminal surface 6 respectively, and bellows 4 surface is equipped with metal and compiles net 7.
The front end and the rear end of the exhaust manifold middle section 2 are respectively provided with a middle section manifold flange end face 10, and the manifold flange end faces of the front end and the rear end of the exhaust manifold middle section 2 are respectively connected with an exhaust manifold front section 1 and an exhaust manifold rear section 3 through bellows 4.
The middle manifold flange end face 10 of the middle section 2 of the exhaust manifold is connected with the corrugated pipe flange end face 5 of the corrugated pipe 4 through a flange coupler 8, and the front section manifold welding end face 9 of the front section 1 of the exhaust manifold and the rear section manifold welding end face 11 of the rear section 3 of the exhaust manifold are connected with the corrugated pipe welding end face 6 of the corrugated pipe 4 in a welding mode.
The inner cavity of the corrugated pipe flange end face 5 of the corrugated pipe 4 is internally provided with a positioning ring groove 15, the front end of the middle manifold flange end face 10 of the exhaust manifold middle section 2 is provided with a positioning step 16, the positioning step 16 of the exhaust manifold middle section 2 extends into the positioning ring groove 15 of the corrugated pipe 4, and a U-shaped sealing ring 17 is arranged between the front end face of the positioning step 16 and the bottom end face of the positioning ring groove 15.
The inner sides of the front end and the rear end of the middle section 2 of the exhaust manifold are respectively provided with an annular groove hole 12, one end of the front section 1 of the exhaust manifold and one end of the rear section 3 of the exhaust manifold, which face the middle section 2 of the exhaust manifold, are respectively provided with a front air guide pipe 13 and a rear air guide pipe 14, the front air guide pipe 13 and the rear air guide pipe 14 respectively extend into the annular groove holes 12 at the front end and the rear end of the middle section 2 of the exhaust manifold, and a certain gap is arranged between the front end surface of.
The utility model discloses a welded connection is adopted with exhaust manifold anterior segment and exhaust manifold back end to the bellows, belongs to rigid connection, and is sealed reliable. The corrugated pipe is connected with the middle section of the exhaust manifold by adopting a flange connector, and the corrugated pipe belongs to rigid connection and is reliable in sealing. The corrugated pipe has elastic deformation capacity and is used for compensating displacement deviation caused by expansion with heat and contraction with cold of the exhaust manifold. The air ducts arranged on the front section and the rear section of the exhaust manifold smoothly guide the waste gas into the middle section of the exhaust manifold, so that the high-temperature waste gas is prevented from directly scouring the corrugated pipe. High-temperature waste gas is cut off through the U-shaped sealing ring, and the service life of the corrugated pipe is prolonged. Adopt inside and outside bilayer structure's corrugated metal pipe, compare with the individual layer metal ripple, divide into two places and relative placement with tubular metal resonator shaping welding seam, its elasticity is more excellent, reduces shaping welding seam fracture risk. The metal woven mesh is sleeved on the outer side of the corrugated pipe to protect the corrugated pipe, so that the corrugated pipe is prevented from being damaged by collision, a damping vibration attenuation effect is generated, the heat dissipation capacity is improved, the service life of the corrugated pipe is greatly prolonged, and the reliability of an exhaust manifold is ensured. Meanwhile, the front section of the exhaust manifold and the rear section of the exhaust manifold are welded with the corrugated pipe of the exhaust manifold to form two non-detachable subassemblies, and the two subassemblies and the middle section of the exhaust manifold form a whole system which can be respectively installed and disassembled, so that the exhaust pipe is convenient to package, transport and store. The whole part does not need to be replaced under the condition that individual parts are damaged, and the use cost is reduced. The utility model provides an exhaust manifold segmentation and this difficult problem of sealing, compare in the scheme of the same kind, the utility model has the advantages of installation and application are convenient, high reliability and long-life.
Claims (4)
1. The utility model provides a well heavy diesel engine is with sealed exhaust manifold, includes exhaust manifold anterior segment (1), exhaust manifold middle section (2), exhaust manifold back end (3) and bellows (4), characterized by: the front end (1) and the rear end (3) of the exhaust manifold are respectively provided with a front manifold welding end face (9) and a rear manifold welding end face (11) facing one end of the exhaust manifold middle section (2), two ends of the corrugated pipe (4) are respectively provided with a corrugated pipe flange end face (5) and a corrugated pipe welding end face (6), the front end and the rear end of the exhaust manifold middle section (2) are respectively provided with a middle manifold flange end face (10), and the manifold flange end faces at the front end and the rear end of the exhaust manifold middle section (2) are respectively connected with the exhaust manifold front section (1) and the exhaust manifold rear section (3) through the corrugated pipe (4); the middle manifold flange end face (10) of the middle section (2) of the exhaust manifold is connected with the corrugated pipe flange end face (5) of the corrugated pipe (4) through a flange connector (8), and the front section manifold welding end face (9) of the front section (1) of the exhaust manifold and the rear section manifold welding end face (11) of the rear section (3) of the exhaust manifold are connected with the corrugated pipe welding end face (6) of the corrugated pipe (4) in a welding mode.
2. The sealed exhaust manifold for medium and heavy duty diesel engines as claimed in claim 1, wherein: and a metal woven net (7) is arranged on the outer surface of the corrugated pipe (4).
3. The sealed exhaust manifold for medium and heavy duty diesel engines as claimed in claim 1, wherein: the inner sides of the front end and the rear end of the exhaust manifold middle section (2) are respectively provided with an annular groove hole (12), the front end (1) of the exhaust manifold and the rear end (3) of the exhaust manifold are respectively provided with a front air guide pipe (13) and a rear air guide pipe (14) towards one end of the exhaust manifold middle section (2), the front air guide pipe (13) and the rear air guide pipe (14) respectively extend into the annular groove hole (12) at the front end and the rear end of the exhaust manifold middle section (2), and a certain gap is formed between the front end face of the front air guide pipe (13) and the front end face of the rear air.
4. The sealed exhaust manifold for medium and heavy duty diesel engines as claimed in claim 1, wherein: be equipped with positioning ring groove (15) in the inner chamber of bellows flange terminal surface (5) of bellows (4), the front end of middle section manifold flange terminal surface (10) of exhaust manifold middle section (2) is equipped with location step (16), and positioning step (16) of exhaust manifold middle section (2) stretch into in positioning ring groove (15) of bellows (4) to be equipped with U-shaped sealing ring (17) between terminal surface and positioning ring groove (15) bottom face before positioning step (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920993233.4U CN210013747U (en) | 2019-06-28 | 2019-06-28 | Sealed exhaust manifold for medium and heavy diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920993233.4U CN210013747U (en) | 2019-06-28 | 2019-06-28 | Sealed exhaust manifold for medium and heavy diesel engine |
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| CN210013747U true CN210013747U (en) | 2020-02-04 |
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| CN201920993233.4U Active CN210013747U (en) | 2019-06-28 | 2019-06-28 | Sealed exhaust manifold for medium and heavy diesel engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610368A (en) * | 2020-12-10 | 2021-04-06 | 一汽解放汽车有限公司 | Exhaust assembly and vehicle |
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2019
- 2019-06-28 CN CN201920993233.4U patent/CN210013747U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610368A (en) * | 2020-12-10 | 2021-04-06 | 一汽解放汽车有限公司 | Exhaust assembly and vehicle |
| CN112610368B (en) * | 2020-12-10 | 2022-07-12 | 一汽解放汽车有限公司 | Exhaust assembly and vehicle |
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