CN212508507U - Exhaust system separates heat exchanger - Google Patents
Exhaust system separates heat exchanger Download PDFInfo
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- CN212508507U CN212508507U CN202020763543.XU CN202020763543U CN212508507U CN 212508507 U CN212508507 U CN 212508507U CN 202020763543 U CN202020763543 U CN 202020763543U CN 212508507 U CN212508507 U CN 212508507U
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- heat shield
- turbocharger
- exhaust manifold
- cooling liquid
- exhaust
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- 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
The utility model provides an exhaust system separates heat exchanger, it includes: the exhaust manifold heat shield is used for covering the exhaust manifold; the turbocharger heat shield is detachably connected to the exhaust manifold heat shield and used for covering a turbocharger and the compressor; a gap is arranged between the exhaust manifold heat shield and the exhaust manifold; a gap is arranged between the turbocharger heat shield and the turbocharger; the exhaust manifold heat shield and/or the turbocharger heat shield include: the cooling device comprises an outer shell, an inner shell and a cooling liquid middle layer positioned between the outer shell and the inner shell. The heat shield of the exhaust system can reduce the heat loss of the exhaust of the engine, improve the combustion and the emission of the engine and obtain better fuel economy.
Description
Technical Field
The utility model relates to a separate the heat exchanger, especially relate to a separate heat exchanger that automobile-used engine exhaust system used.
Background
The explosion-proof heat insulation cover of the engine exhaust system has the main functions of heat insulation and protection, and is installed for preventing inflammable matters such as coal dust and the like from being attached to an exhaust pipe to cause fire during running of an oil or a vehicle, preventing high-temperature radiation generated by the exhaust pipe from irradiating adjacent parts to cause potential safety hazards, and enhancing the safety performance of the engine during working.
The heat insulation mode of the existing exhaust system mostly adopts a mode that a layer of stainless steel or cast iron shell is directly additionally arranged outside an exhaust manifold and a turbocharger, cooling water is used for cooling between the exhaust manifold and the turbocharger and the shell, and the cooling water directly cools the exhaust manifold and the turbocharger, so that the surface temperature can be reduced to meet the safety requirement, but the exhaust enthalpy value of an engine flowing through a turbine is reduced, the work capacity of the turbine is reduced, and the fuel economy of the engine is influenced.
Disclosure of Invention
In view of the above, the present invention provides a heat shield for an exhaust system, which can reduce heat loss of engine exhaust.
The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:
an exhaust system heat shield, comprising: the exhaust manifold heat shield is used for covering the exhaust manifold; the turbocharger heat shield is detachably connected to the exhaust manifold heat shield and used for covering a turbocharger and the compressor; a gap is arranged between the exhaust manifold heat shield and the exhaust manifold; a gap is arranged between the turbocharger heat shield and the turbocharger; the exhaust manifold heat shield and/or the turbocharger heat shield include: the cooling device comprises an outer shell, an inner shell and a cooling liquid middle layer positioned between the outer shell and the inner shell.
In some alternative embodiments of the present application, the exhaust manifold is welded to an exhaust manifold base and the exhaust manifold heat shield is welded to the exhaust manifold base.
In some optional embodiments of the present application, the turbocharger is fixed to an outer casing of the exhaust manifold heat shield, and the turbocharger heat shield is provided on the turbocharger and is bolted to the exhaust manifold heat shield.
In some optional embodiments of the present application, the outer shell of the exhaust manifold heat shield is provided with a first coolant inlet and a first coolant outlet, and the first coolant inlet and the first coolant outlet are located on different surfaces of the exhaust manifold heat shield.
In some optional embodiments of the present application, the outer shell of the exhaust manifold heat shield is provided with a connecting bolt for connecting the turbocharger.
In some optional embodiments of the present application, a second coolant inlet and a second coolant outlet are provided on the outer shell of the turbocharger heat shield, and the second coolant inlet and the second coolant outlet are located on different surfaces.
In some optional embodiments of the present application, the turbocharger heat shield is provided with a compressor inlet hole, a compressor outlet hole and a turbine outlet hole which are arranged through the outer shell and the inner shell, and the compressor inlet hole, the compressor outlet hole and the turbine outlet hole are located on different surfaces.
In some optional embodiments of the present application, the turbocharger heat shield is internally provided with a heat insulation wall for isolating the compressor from the turbocharger.
In some optional embodiments of the present application, a turbocharger heat shield fixing plate for connecting with the exhaust manifold heat shield is further provided on the turbocharger heat shield.
In some optional embodiments of the present application, the outer shell and the inner shell are both made of stainless steel; the thickness of the outer shell is greater than that of the inner shell.
The technical scheme of the utility model prior art relatively has following technological effect:
1. the utility model discloses an exhaust system heat shield design is for the bilayer structure including inlayer casing and outer casing to remain there is sufficient space between the inner wall of exhaust manifold, turbo charger and housing, form the air insulating layer, reduced the carminative calorific loss of engine, can improve turbo charger's acting efficiency, improve inlet pressure, improve the burning and the emission of engine, obtain better fuel economy. Meanwhile, the circulating cooling liquid is added between the double-layer wall surfaces of the heat shield, so that the corrosion caused by the contact of the cooling liquid with the hot surfaces of the exhaust manifold and the turbocharger is prevented on the premise that the temperature of the outer surface meets the requirement of explosion-proof regulations at 150 ℃, and the service lives of the exhaust manifold and the turbocharger are prolonged.
2. The utility model discloses cover turbocharger whole in the turbocharger separates heat exchanger, can prevent because the potential safety hazard that compressor surface temperature too high arouses, add the heat insulating wall in the middle of turbocharger and compressor simultaneously, can reduce the heat radiation of turbocharger to the compressor, reduce the compressor temperature, improve the pressure boost degree of engine, improve fuel economy. Meanwhile, the heat insulation wall can reduce the temperature of lubricating oil in the connecting shaft of the turbocharger and reduce faults caused by overhigh temperature of the lubricating oil.
3. The utility model discloses an exhaust manifold separates heat exchanger and exhaust manifold welded type as an organic whole is fixed, and turbo charger separates heat exchanger and turbo charger then is independent mounting structure, simple to operate, and processing is simple, and satisfies explosion-proof requirement.
Drawings
FIG. 1 is a schematic diagram of the exhaust system heat shield of the present invention;
FIG. 2 is a front perspective view of the middle exhaust manifold heat shield of the present invention;
FIG. 3 is a partial cross-sectional view of a mid-exhaust manifold heat shield of the present invention;
FIG. 4 is a first perspective view of a turbocharger heat shield according to the present invention;
fig. 5 is a second perspective view of the heat shield for a turbocharger of the present invention.
Detailed Description
The present invention will be described in detail with reference to examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Fig. 1 is a specific embodiment of the exhaust system heat shield of the present invention. The turbocharger heat shield comprises an exhaust manifold heat shield 2 and a turbocharger heat shield 1 which are detachably connected, and the two parts are integrally connected to an engine after being connected. The turbocharger heat shield 1 is used for covering a turbocharger and a compressor (not shown in the figure), and the exhaust manifold heat shield 2 is used for covering an exhaust manifold.
The structures of the exhaust manifold heat shield 2 and the turbocharger heat shield 1 and the connection manner of the two will be described below.
< exhaust manifold Heat insulating cover >
As shown in fig. 2 and 3, the exhaust manifold heat shield 2 includes an outer casing a, an inner casing B, and a coolant intermediate layer between the outer casing a and the inner casing B. The circulating cooling liquid is added between the double-layer wall surfaces (namely the outer shell 201 and the inner shell 202) of the exhaust manifold heat shield 2, so that the corrosion generated by the contact between the cooling liquid and the hot surface of the exhaust manifold is prevented on the premise that the temperature of the outer surface meets the requirement of explosion-proof regulation at 150 ℃, and the service life of the exhaust manifold is prolonged.
Specifically, the outer shell A is a stainless steel plate with the thickness of 3mm, the inner shell B is a stainless steel plate with the thickness of 1mm, and the cooling liquid contained in the cooling liquid middle layer is engine antifreeze liquid or engine circulating water. The outer shell A and the inner shell B are designed to ensure that the width between the joint surfaces is not less than 13mm, the thickness is not less than 5mm, the surface roughness Ra is not more than 6.3 mu m, and the shell can bear the pressure of at least 0.8MPa and cannot deform.
The exhaust manifold 3 is welded on an exhaust manifold base 4, and the exhaust manifold heat shield 2 is welded on the exhaust manifold base 4. A gap is formed between the exhaust manifold heat shield 2 and the exhaust manifold 3, and an enough gap is reserved between the exhaust manifold 3 and the inner wall surface of the exhaust manifold heat shield 2 to form an air heat insulation layer, so that the heat loss of engine exhaust is reduced, the working efficiency of a turbocharger can be improved, the air inlet pressure is improved, the combustion and the emission of an engine are improved, and better fuel economy is obtained.
Specifically, the exhaust manifold 3 is an exhaust manifold for an engine, and a common material is cast iron. The exhaust manifold 3 and the exhaust manifold heat shield 2 are not necessarily assembled. The embodiment adopts the following installation modes: the exhaust manifold base 4 is a stainless steel plate with the thickness of 8mm for fixing the exhaust manifold, exhaust holes and bolt holes corresponding to the exhaust manifold 3 are cut on the stainless steel plate by laser cutting, the exhaust manifold 3 is welded on the exhaust manifold base 4, the flatness of the stainless steel plate is ensured by milling or grinding and other processes, and the surface roughness Ra is not more than 6.3 mu m; the exhaust manifold heat shield 2 is welded to the exhaust manifold base 202.
A first cooling liquid inlet 201 and a first cooling liquid outlet 202 are arranged on an outer shell A of the exhaust manifold heat shield 2, and the first cooling liquid inlet 201 and the first cooling liquid outlet 202 are located on different surfaces of the exhaust manifold heat shield 2. Specifically, in the present embodiment, the first cooling liquid inlet 201 and the first cooling liquid outlet 202 are located on two opposite surfaces, which can ensure that the cooling liquid circulates more sufficiently inside the exhaust manifold heat shield 2, and improve the uniformity of heat dissipation of the exhaust manifold heat shield 2. In addition, the sizes of the first cooling liquid inlet 201 and the first cooling liquid outlet 202 should have inner diameters designed according to the pressure of circulating cooling liquid of the engine to ensure sufficient cooling flow, outer diameters designed to be as consistent as possible with the required pipe diameters of the rest cooling pipelines of the engine to ensure good interchangeability of parts, and anti-skid grooves designed on the outer ring to prevent the pipelines from slipping.
The turbocharger separates inside exhaust manifold installation bolt support column 206 that is equipped with of heat exchanger 2, exhaust manifold installation bolt support column 206 is the stainless steel pipe box, welds on exhaust manifold base 4, should guarantee coaxial with the bolt mounting hole, and the internal diameter should be the same with this mounting hole diameter, for guaranteeing not to warp for bearing the tightening pressure of installation exhaust manifold bolt, and thickness should not be less than 2.5 mm.
< turbocharged Heat shroud >
As shown in fig. 4 and 5, the turbocharger heat shield 1 also includes an outer casing a, an inner casing B, and a coolant intermediate layer between the outer casing a and the inner casing B. The circulating cooling liquid is added between the double-layer wall surfaces (namely the outer shell 201 and the inner shell 202) of the heat shield 1 of the turbocharger, so that the corrosion generated by the contact of the cooling liquid and the hot surface of the turbocharger is prevented on the premise that the temperature of the outer surface meets the requirement of explosion-proof regulation at 150 ℃, and the service life of the turbocharger is prolonged.
Specifically, the outer shell A is a stainless steel plate with the thickness of 3mm, the inner shell B is a stainless steel plate with the thickness of 1mm, and the cooling liquid contained in the cooling liquid middle layer is engine antifreeze liquid or engine circulating water. The outer shell A and the inner shell B are designed to ensure that the width between the joint surfaces is not less than 13mm, the thickness is not less than 5mm, the surface roughness Ra is not more than 6.3 mu m, and the shell can bear the pressure of at least 0.8MPa and cannot deform.
The outer shell A of the turbocharger heat shield 1 is provided with a second cooling liquid inlet 101 and a second cooling liquid outlet 102, and the second cooling liquid inlet 101 and the second cooling liquid outlet 102 are located on different surfaces. Specifically, in the present embodiment, the second cooling liquid inlet 101 and the second cooling liquid outlet 102 are located on the upper side and the lower side of the housing of the turbocharger heat shield 1, so that the cooling liquid can be more sufficiently circulated inside the turbocharger heat shield 1, and the heat dissipation uniformity of the turbocharger heat shield 1 is improved. In addition, the sizes of the second cooling liquid inlet 101 and the first cooling liquid outlet 102 should have inner diameters designed according to the pressure of the circulating cooling liquid of the engine to ensure sufficient cooling flow, outer diameters designed to be as consistent as possible with the required pipe diameters of the rest cooling pipelines of the engine to ensure good interchangeability of parts, and an anti-skid groove designed on the outer ring to prevent the pipelines from slipping.
The turbocharger heat insulation cover 1 is internally provided with a heat insulation wall 106 for isolating the compressor and the turbocharger, and the heat insulation wall 106 divides the turbocharger heat insulation cover 1 into two chambers for covering the turbocharger and the compressor respectively. The double-layer shell and single-layer stainless steel combined structure of the heat insulation wall 106 is characterized in that a single-layer stainless steel plate is adopted as a part matched with the turbocharger and the compressor connecting shaft, the rest parts are of a double-layer shell structure, the single-layer stainless steel is required to be ensured to be in direct contact with a turbine and an oil inlet when the thickness of the single-layer stainless steel plate is designed, the double-layer shell part cannot be in direct contact with the turbocharger connecting shaft and the turbine shell, and a mounting space for a fastening bolt of the turbocharger is reserved at the lower part of the double.
The turbocharger heat shield 1 is provided with a compressor inlet hole 103, a compressor outlet hole 104 and a turbine outlet hole 105 which are arranged in the outer shell A and the inner shell B in a penetrating mode, and the compressor inlet hole 103, the compressor outlet hole 104 and the turbine outlet hole 105 are located on different surfaces. The compressor inlet hole 103, the compressor outlet hole 104 and the turbine outlet hole 105 are designed according to the sizes of all interface pipelines of the turbocharger, the sealing performance of all pipelines and the three pipelines is guaranteed, and under proper conditions, the corresponding pipelines and holes can be directly welded to guarantee sealing.
The turbocharger lubricating oil pipe hole 108 is formed in the turbocharger heat shield 1 and used for enabling the turbocharger lubricating oil pipe to penetrate through the inner shell and the outer shell of the turbocharger heat shield 1, the position and the size of the hole are determined according to the position and the size of the oil inlet/return pipe of the turbocharger and the connecting position of the oil inlet/return pipe and the engine body, and the hole and the oil pipe are sealed through a threaded rubber pressing sleeve structure.
< connection of turbocharger turbine and turbocharger Heat insulating cover to exhaust manifold Heat insulating cover >
And the outer shell A of the exhaust manifold heat shield 2 is provided with a connecting hole 204 for connecting a turbocharger and a connecting bolt 203 for connecting the turbocharger heat shield.
The turbocharger is connected to the outer shell a of the exhaust manifold heat shield 2 by connecting bolts. The turbocharger heat shield fixing plate 107 used for being connected with the exhaust manifold heat shield is arranged on the turbocharger heat shield 1, the turbocharger heat shield fixing plate 107 is a stainless steel single-layer plate, through holes are drilled according to the positions of connecting bolts 203 on the exhaust manifold heat shield 2, and the thickness of the stainless steel plate is not less than 8mm, and the stainless steel plate is welded on the double-layer shell 101 in a perpendicular relation. During assembly, the through hole of the turbocharger heat shield fixing plate 107 is arranged on the connecting bolt 203 on the exhaust manifold heat shield 2 in a penetrating mode, and the connecting bolt and the exhaust manifold heat shield fixing plate can be connected and fixed through nuts.
The utility model discloses an above-mentioned turbo charger separates heat exchanger 1 and separates heat exchanger 2 design for the bilayer structure including inlayer casing B and outer casing A to remain sufficient space between the inner wall of exhaust manifold, turbo charger and housing, form the air insulating layer, reduced the carminative calorific loss of engine, can improve turbo charger's acting efficiency, improve inlet pressure, improve the burning and the emission of engine, obtain better fuel economy. Meanwhile, the circulating cooling liquid is added between the double-layer wall surfaces of the heat shield, so that the corrosion caused by the contact of the cooling liquid with the hot surfaces of the exhaust manifold and the turbocharger is prevented on the premise that the temperature of the outer surface meets the requirement of explosion-proof regulations at 150 ℃, and the service lives of the exhaust manifold and the turbocharger are prolonged.
In another embodiment of the present invention, in order to save the manufacturing cost, one of the turbocharger heat shield 1 and the exhaust manifold heat shield 2 may be designed to have a double-layer structure including an inner shell B and an outer shell a.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An exhaust system heat shield, comprising:
the exhaust manifold heat shield is used for covering the exhaust manifold;
the turbocharger heat shield is detachably connected to the exhaust manifold heat shield and used for covering a turbocharger and the compressor; the method is characterized in that:
a gap is arranged between the exhaust manifold heat shield and the exhaust manifold;
a gap is arranged between the turbocharger heat shield and the turbocharger;
the exhaust manifold heat shield and/or the turbocharger heat shield include: the cooling device comprises an outer shell, an inner shell and a cooling liquid middle layer positioned between the outer shell and the inner shell.
2. The exhaust system heat shield of claim 1, wherein:
the exhaust manifold is welded on the exhaust manifold base, and the exhaust manifold heat shield is welded on the exhaust manifold base.
3. The exhaust system heat shield of claim 1, wherein:
the turbocharger is fixed on the outer shell of the exhaust manifold heat shield, and the turbocharger heat shield is arranged on the turbocharger and connected with the exhaust manifold heat shield through bolts.
4. The exhaust system heat shield of claim 1, wherein:
the outer shell of the exhaust manifold heat shield is provided with a first cooling liquid inlet and a first cooling liquid outlet, and the first cooling liquid inlet and the first cooling liquid outlet are located on different surfaces of the exhaust manifold heat shield.
5. The exhaust system heat shield of claim 1, wherein:
and the outer shell of the exhaust manifold heat shield is provided with a connecting bolt for connecting the turbocharger heat shield.
6. The exhaust system heat shield of claim 1, wherein:
and a second cooling liquid inlet and a second cooling liquid outlet are formed in the outer shell of the thermal shield of the turbocharger, and the second cooling liquid inlet and the second cooling liquid outlet are located on different surfaces.
7. The exhaust system heat shield of claim 1, wherein:
the turbocharger heat shield is provided with a compressor inlet hole, a compressor outlet hole and a turbine outlet hole which penetrate through the outer shell and the inner shell, and the compressor inlet hole, the compressor outlet hole and the turbine outlet hole are located on different surfaces.
8. The exhaust system heat shield of claim 1, wherein:
and a heat insulation wall for isolating the compressor and the turbocharger is arranged in the heat insulation cover of the turbocharger.
9. The exhaust system heat shield of claim 1, wherein:
the turbocharger heat shield fixing plate is used for being connected with the exhaust manifold heat shield.
10. The exhaust system heat shield according to any one of claims 1 to 9, wherein: the outer shell and the inner shell are both made of stainless steel; the thickness of the outer shell is greater than that of the inner shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020763543.XU CN212508507U (en) | 2020-05-09 | 2020-05-09 | Exhaust system separates heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020763543.XU CN212508507U (en) | 2020-05-09 | 2020-05-09 | Exhaust system separates heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212508507U true CN212508507U (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020763543.XU Active CN212508507U (en) | 2020-05-09 | 2020-05-09 | Exhaust system separates heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212508507U (en) |
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2020
- 2020-05-09 CN CN202020763543.XU patent/CN212508507U/en active Active
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