Heat shield for turbocharger and turbocharger

Abstract

The utility model discloses a heat shield for a turbocharger and the turbocharger. The heat shield includes a mounting substrate configured to be mounted on an intake port mounting flange of a volute of the turbocharger and having a first surface and a second surface opposite the first surface, and a first cylindrical portion disposed on the mounting substrate, the first cylindrical portion extends from the first surface of the mounting substrate and into an air inlet in the air inlet mounting flange.

Description

Technical Field

[0001] The embodiments disclosed herein generally relate to the field of turbocharger technology, and more particularly to a heat shield for a turbocharger and a turbocharger including the heat shield. Background Technology

[0002] A turbocharger uses the energy of a high-temperature fluid, such as exhaust gas from an engine, to rotate turbine blades, which in turn rotates the impeller of a compressor mechanically connected to the turbine blades via a rotating shaft. The turbocharger compresses the gases used for combustion in the engine (e.g., air) and delivers them into the engine via the rotating impeller. However, when the exhaust gas traveling through the turbine impeller passes through the intake flange of the turbine housing, which connects to the engine's exhaust manifold, it generates heat, potentially causing thermomechanical fatigue and cracking in the turbine housing's intake flange. Utility Model Content

[0003] This disclosure is made in order to overcome at least one of the above-mentioned and other problems and defects existing in the prior art.

[0004] According to one aspect of this disclosure, a heat shield for a turbocharger is provided, the heat shield including a mounting base and a first cylindrical portion, the mounting base being configured to be mounted on an intake port mounting flange of the turbocharger housing and having a first surface and a second surface opposite to the first surface, the first cylindrical portion extending from the first surface of the mounting base and extending into an intake port on the intake port mounting flange.

[0005] According to an exemplary embodiment of this disclosure, the distance between the outer surface of the sidewall of the first cylindrical portion and the inner surface of the sidewall of the air inlet is greater than 0.5 mm.

[0006] According to an exemplary embodiment of the present disclosure, the turbocharger is a dual-channel turbocharger, and the number of the first cylindrical portions is two, with the two first cylindrical portions extending one-to-one into the air inlets of the two channels of the dual-channel turbocharger.

[0007] According to an exemplary embodiment of the present disclosure, the partition wall between the two channels of the turbocharger forms a clearance space for mounting the first cylindrical portion.

[0008] According to an exemplary embodiment of the present disclosure, the heat shield further includes a gasket fitted on the side wall of the first cylindrical portion.

[0009] According to an exemplary embodiment of the present disclosure, one of the end faces of the mounting base plate and the intake port mounting flange is formed with a first protrusion around the first cylindrical portion, and the other of the end faces of the mounting base plate and the intake port mounting flange is formed with a first groove that cooperates with the first protrusion.

[0010] According to an exemplary embodiment of the present disclosure, the first groove is V-shaped, U-shaped, or semi-circular.

[0011] According to an exemplary embodiment of the present disclosure, the heat shield further includes a second cylindrical portion configured to extend from the second surface of the mounting base plate and into an exhaust port of an exhaust manifold mounting flange of an exhaust manifold connected to the intake port mounting flange.

[0012] According to an exemplary embodiment of the present disclosure, a distance between an outer surface of a sidewall of the second cylindrical portion and an inner surface of a sidewall of the exhaust port is greater than 0.5 mm.

[0013] According to an exemplary embodiment of the present disclosure, the number of the exhaust manifolds is two, and the number of the second cylindrical portions is two, and the two second cylindrical portions extend into the exhaust ports of the two exhaust manifolds one-to-one.

[0014] According to an exemplary embodiment of the present disclosure, a partition wall between the two exhaust manifolds is formed with a relief space for mounting the second cylindrical portions.

[0015] According to an exemplary embodiment of the present disclosure, the heat shield further includes a gasket sleeved on the sidewall of the second cylindrical portion.

[0016] According to an exemplary embodiment of the present disclosure, one of the end faces of the mounting base plate and the exhaust manifold mounting flange is formed with a second protrusion around the second cylindrical portion, and the other of the end faces of the mounting base plate and the exhaust manifold mounting flange is formed with a second groove that cooperates with the second protrusion.

[0017] According to an exemplary embodiment of the present disclosure, the second groove is V-shaped, U-shaped, or semi-circular.

[0018] Other objects and advantages of the present disclosure will become apparent and help to understand the present disclosure from the following description of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view illustrating connection of a turbocharger, an exhaust manifold, and a heat shield according to an exemplary embodiment of the present disclosure.

[0020] Figure 2 is Figure 1 a cross-sectional view of a turbocharger, exhaust manifold, and heat shield.

[0021] Figure 3 is Figure 2 a partial enlarged view.

[0022] Figure 4 is Figure 1 a structural view of a heat shield.

[0023] Figure 5 is a structural view of a heat shield according to one exemplary embodiment of the present disclosure.

[0024] Figure 6 is Figure 5 another view of a heat shield. DETAILED DESCRIPTION

[0025] Embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings. In the present specification, the same or similar components are designated by the same or similar reference numerals. The following description of the embodiments of the present disclosure with reference to the accompanying drawings is intended to explain the general scope of the present disclosure, and should not be understood as one kind of limitation.

[0026] Further, in the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present disclosure. However, it would be apparent that one or more embodiments can be practiced without these specific details. In other instances, well-known structures and devices are illustrated in block diagram form in order to simplify the accompanying drawings.

[0027] In the following detailed description, directional terms such as "front", "rear", "upper", "lower", "top", "bottom", "left", "right", "upper", and "lower", "inner", "outer", etc. are defined with reference to the accompanying drawings, but the shape and position of the components are not limited by these terms and can be adjusted according to the actual application.

[0028] Although the terms "first", "second", and the like can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the present disclosure, a first element can be referred to as a second element, and a second element can be referred to as a first element. The term "and / or" includes a plurality of combinations of the associated items or any one of a plurality of associated items.

[0029] As Figures 1 to 4As shown, the heat shield 300 for the turbocharger 100 according to the present disclosure is installed between the intake port mounting flange 101 of the turbocharger 100 and the exhaust manifold mounting flange 201 of the exhaust manifold 200 of the engine. Specifically, the heat shield 300 includes a mounting base plate 301 and two first cylindrical portions 302, the mounting base plate 301 is disposed between the intake port mounting flange 101 of the turbocharger 100 and the exhaust manifold mounting flange 201 of the exhaust manifold 200, and has a first surface and a second surface opposite to the first surface, and the two first cylindrical portions 302 respectively extend from the first surface of the mounting base plate 301 and extend into the intake ports 102 of the two passages of the volute of the turbocharger 100, so as to isolate the high-temperature exhaust gas from the exhaust manifold 200 of the engine from the intake port mounting flange 101 of the volute, so that the influence of the heat of the exhaust gas on the intake port mounting flange 101 of the volute can be reduced or avoided, thereby preventing the risk of thermal mechanical fatigue and cracks of the intake port mounting flange 101.

[0030] According to an exemplary embodiment of the present disclosure, as Figure 3 As shown, the outer surface of the side wall of the first cylindrical portion 302 is spaced apart from the inner surface of the side wall of the intake port 102 by a distance D1, which is preferably greater than 0.5 mm. By spacing the outer surface of the side wall of the first cylindrical portion 302 from the inner surface of the side wall of the intake port 102, the influence of the heat of the high-temperature exhaust gas on the intake port mounting flange 101 can be further reduced or avoided.

[0031] In Figures 1 to 4 In the exemplary embodiment shown, the turbocharger 100 is a double-passage turbocharger, the volute of the turbocharger 100 includes a first passage and a second passage, the intake port 102 of the first passage and the intake port 102 of the second passage are both formed on the intake port mounting flange 101, and accordingly, the number of first cylindrical portions 302 is two, and the two first cylindrical portions 302 extend into the two intake ports 102 one by one. It should be noted that in some other embodiments of the present disclosure, the heat shield 300 can also be applied to a single-passage turbocharger 100, in which case the number of first cylindrical portions is 1.

[0032] According to an exemplary embodiment of the present disclosure, as Figure 2 and Figure 3As shown, the partition wall 104 between the two passages of the turbocharger 100 is formed with a relief space for mounting the first cylindrical part 302. That is, the partition wall 104 at the intake port mounting flange 101 between the first passage and the second passage of the turbocharger 100 can be at least partially removed to facilitate the mounting of the first cylindrical part 302, and after the first cylindrical part 302 is mounted in place, the sidewall of the first cylindrical part 302 can serve as the partition wall between the first passage and the second passage at the intake port mounting flange 101. In addition, since the partition wall at the intake port mounting flange 101 is more obviously affected by the heat of the exhaust gas, and the thickness of the partition wall at the intake port mounting flange 101 is smaller relative to other portions of the intake port mounting flange 101, thus leading to a greater risk of cracks in the partition wall at the intake port mounting flange 101 due to thermal mechanical fatigue, therefore, according to the embodiment of the present disclosure, by at least partially removing the partition wall at the intake port mounting flange 101 and replacing it with the sidewall of the first cylindrical part 302, the risk of cracks in the partition wall leading to damage to the intake port mounting flange 101 can be greatly reduced. Preferably, the end of the first cylindrical part 302 away from the mounting base plate 301 abuts against the partition wall 104 after being mounted in place to avoid mutual influence between the two passages.

[0033] According to an exemplary embodiment of the present disclosure, as Figure 3 As shown, a first protrusion 304 is formed around the first cylindrical part 302 on the mounting base plate 301, and a first groove 103 is formed on the end face of the intake port mounting flange 101 to cooperate with the first protrusion 304. Through the cooperation of the first protrusion 304 and the first groove 103, leakage of exhaust gas from the engine through the gap between the end face of the mounting base plate 301 and the intake port mounting flange 101 can be prevented. It should be noted that in some other embodiments of the present disclosure, the first protrusion 304 can also be provided on the end face of the intake port mounting flange 101, and correspondingly, the first groove 103 cooperating with the first protrusion 304 can be provided on the mounting base plate 301.

[0034] According to an exemplary embodiment of the present disclosure not shown, the heat shield 300 can further include a first gasket sleeved on the sidewall of the first cylindrical portion 302, which can be located at the approximate middle of the first cylindrical portion 302 in the axial direction for example. The thickness of the first gasket in the radial direction of the first cylindrical portion 302 is preferably slightly greater than the spacing distance between the outer surface of the sidewall of the first cylindrical portion 302 and the inner surface of the sidewall of the intake port 102, so that when the heat shield 300 is assembled to the intake port mounting flange 101, the first gasket is pressed between the first cylindrical portion 302 and the inner surface of the sidewall of the intake port 102, thereby preventing the exhaust gas from the engine from leaking through the gap between the first cylindrical portion 302 and the intake port 102, while also ensuring that the first cylindrical portion 302 is spaced apart from the inner surface of the sidewall of the intake port 102 in the circumferential direction of the first cylindrical portion 302, thereby preventing the heat of the exhaust gas from the engine from being directly transmitted to the intake port mounting flange 101 through the first cylindrical portion 302.

[0035] According to an exemplary embodiment of the present disclosure, as shown in Figure 3 , the first recess 103 is V-shaped, so that a line contact is formed on each side of the first protrusion 304 between the first protrusion 304 and the first recess 103, which can further prevent the exhaust gas from leaking through the gap between the mounting base plate 301 and the end surface of the intake port mounting flange 101. It should be noted that in some other embodiments of the present disclosure, the first recess 103 can also be U-shaped, semicircular or other suitable shapes.

[0036] According to an exemplary embodiment of the present disclosure, as shown in Figure 2 and 3 , the heat shield 300 can further include a second cylindrical portion 303 configured to extend from the second surface of the mounting base plate 301 and into the exhaust port 202 of the exhaust manifold mounting flange 201 connected to the intake port mounting flange 101, so as to isolate the high-temperature exhaust gas from the engine from the exhaust manifold mounting flange 201 of the exhaust manifold 200, which can reduce or avoid the influence of the heat of the exhaust gas on the exhaust manifold mounting flange 201, thereby preventing the risk of thermal mechanical fatigue and cracking of the exhaust manifold mounting flange 201. It should be noted that in some exemplary embodiments of the present disclosure, the heat shield can also not include a second cylindrical portion, for example as shown in Figure 5 and Figure 6 .

[0037] According to an exemplary embodiment of the present disclosure, as shown in Figure 3As shown, the outer surface of the side wall of the second cylindrical portion 303 is spaced apart from the inner surface of the side wall of the exhaust port 202 by a distance D2, which is preferably greater than 0.5mm, so as to space apart the high-temperature exhaust gas from the engine and the inner surface of the side wall of the exhaust port 202, thereby further reducing or avoiding the influence of the heat of the exhaust gas on the exhaust manifold mounting flange 201.

[0038] In Figures 1 to 4 In the exemplary embodiment shown, the number of exhaust manifolds 200 is two, and the exhaust ports 202 of the two exhaust manifolds are both formed on the exhaust manifold mounting flange 101, and correspondingly, the number of second cylindrical portions 303 is two, and the two second cylindrical portions 303 extend into the two exhaust ports 22 one by one. It should be noted that in some other embodiments of the present disclosure, when the number of exhaust manifolds is one, the number of second cylindrical portions is correspondingly modified to 1.

[0039] According to an exemplary embodiment of the present disclosure, as Figure 2 and Figure 3 As shown, the partition wall 204 between the two exhaust manifolds 200 is formed with a relief space for mounting the second cylindrical portion 303. That is, the partition wall 204 between the two exhaust manifolds 200 at the exhaust manifold mounting flange 201 can be at least partially removed to facilitate the installation of the second cylindrical portion 303, and after the second cylindrical portion 303 is installed in place, the side wall of the second cylindrical portion 303 can serve as the partition wall between the two exhaust manifolds 200 at the exhaust manifold mounting flange 101. In addition, since the partition wall at the exhaust manifold mounting flange 201 is more obviously affected by the heat of the exhaust gas, and the thickness of the partition wall at the exhaust manifold mounting flange 201 is smaller relative to other parts of the exhaust manifold mounting flange 201, thereby resulting in a greater risk of cracks in the partition wall at the exhaust manifold mounting flange 201 due to thermal mechanical fatigue. According to the embodiments of the present disclosure, by at least partially removing the partition wall at the exhaust manifold mounting flange 201 and replacing it with the side wall of the second cylindrical portion 303, the risk of the partition wall between the two exhaust manifolds 200 being cracked and causing the entire exhaust manifold 200 to be damaged can be avoided. Preferably, the end of the second cylindrical portion 303 away from the mounting base plate 301 abuts against the partition wall 204 after installation, so as to avoid the mutual influence between the two exhaust manifolds.

[0040] According to an exemplary embodiment of the present disclosure, as Figure 2 and Figure 3As shown, a second protrusion 305 is formed around the second cylindrical portion 303 on the mounting base 301, and a second groove 203 that mates with the second protrusion 305 is formed on the end face of the exhaust manifold mounting flange 201. The engagement of the second protrusion 305 and the second groove 203 prevents exhaust gases from the engine from leaking through the gap between the mounting base 301 and the end face of the exhaust manifold mounting flange 201. It should be noted that in some other embodiments of this disclosure, the second protrusion 305 may also be provided on the end face of the exhaust manifold mounting flange 201, and correspondingly, the second groove 203 that mates with the second protrusion 305 may be provided on the mounting base 301.

[0041] According to an exemplary embodiment of this disclosure, such as Figure 3 As shown, the second groove 203 is V-shaped, so that the second protrusion 305 and the second groove 203 form a line contact on opposite sides of the second protrusion 305, which further prevents exhaust gas from leaking through the gap between the mounting base 301 and the end face of the exhaust manifold mounting flange 201. It should be noted that in some other embodiments of this disclosure, the second groove 203 may also be U-shaped, semi-circular, or other suitable shapes.

[0042] According to an exemplary embodiment not shown in this disclosure, the heat shield 300 may further include a second gasket fitted onto the outer surface of the sidewall of the second cylindrical portion 303. This second gasket may, for example, be located approximately at the center of the second cylindrical portion 303 in the axial direction. The thickness of the second gasket in the radial direction of the second cylindrical portion 303 is preferably slightly greater than the distance between the outer surface of the sidewall of the second cylindrical portion 303 and the inner surface of the sidewall of the exhaust port 202. This ensures that when the heat shield 300 is installed between the intake port mounting flange 101 and the exhaust manifold mounting flange 201, the second gasket is pressed between the second cylindrical portion 303 and the inner surface of the sidewall of the exhaust port 202. This prevents exhaust gases from the engine from leaking through the gap between the second cylindrical portion 303 and the exhaust port 202, while also ensuring that the second cylindrical portion 303 is spaced apart from the inner surface of the sidewall of the exhaust port 202 in its circumferential direction, thereby preventing heat from the exhaust gases from the engine from being directly transferred to the exhaust manifold 200 via the second cylindrical portion 303.

[0043] According to an exemplary embodiment of this disclosure, such as Figures 4 to 6 As shown, a mounting hole 306 is formed on the mounting base of the heat shield, which can correspond to the mounting holes on the intake port mounting flange 101 of the turbocharger 100 and the mounting holes on the exhaust manifold mounting flange 201 of the exhaust manifold 200, so that they can be assembled together by fasteners passing through them.

[0044] According to another aspect of the present disclosure, there is also provided a turbocharger 100 including the heat shield 300 as described above.

[0045] The heat shield for a turbocharger according to the various embodiments described above of the present disclosure can reduce or avoid the influence of the heat of the exhaust gas on the intake port mounting flange of the volute, preventing the risk of thermal mechanical fatigue and cracks of the intake port mounting flange. In addition, the heat shield can also prevent the leakage of exhaust gas, and can replace the gasket in the conventional technology.

[0046] Although embodiments of the present disclosure have been shown and described, it will be understood by those of ordinary skill in the art that changes can be made thereto without departing from the principles and spirit of the present disclosure, the scope of protection of which is defined by the appended claims and their equivalents. In addition, it should be noted that the words "comprise", "contain", "have" used herein do not exclude other elements or steps unless otherwise indicated. In addition, any element reference of the claims should not be understood as limiting the scope of protection of the present disclosure.

Claims

1. A heat shield for a turbocharger, characterized by, The heat shield includes a mounting base plate configured to be mounted on an intake port mounting flange of a scroll of the turbocharger, and having a first surface and a second surface opposite to the first surface, and a first cylindrical portion extending from the first surface of the mounting base plate and into an intake port on the intake port mounting flange.

2. The heat shield of claim 1, wherein, A distance between an outer surface of a sidewall of the first cylindrical portion and an inner surface of a sidewall of the intake port is greater than 0.5 mm.

3. The heat shield of claim 1, wherein, The turbocharger is a dual-channel turbocharger, and the number of the first cylindrical portions is two, with each of the two first cylindrical portions extending into an intake port of a respective one of two channels of the dual-channel turbocharger.

4. The heat shield of claim 3, wherein, A partition wall between the two channels of the turbocharger is formed with a clearance space for mounting the first cylindrical portion.

5. The heat shield of claim 1, wherein, The heat shield further includes a gasket sleeved on the sidewall of the first cylindrical portion.

6. The heat shield of claim 1, wherein, One of an end surface of the mounting base plate and an end surface of the intake port mounting flange is formed with a first protrusion around the first cylindrical portion, and the other of the end surface of the mounting base plate and the end surface of the intake port mounting flange is formed with a first groove matched with the first protrusion.

7. The heat shield of claim 6, wherein, The first groove is V-shaped, U-shaped, or semi-circular.

8. The heat shield of any one of claims 1-7, wherein, The heat shield further includes a second cylindrical portion configured to extend from the second surface of the mounting base plate and into an exhaust port of an exhaust manifold mounting flange of an exhaust manifold connected with the intake port mounting flange.

9. The heat shield of claim 8, wherein, A distance between an outer surface of a sidewall of the second cylindrical portion and an inner surface of a sidewall of the exhaust port is greater than 0.5 mm.

10. The heat shield of claim 8, wherein, The number of the exhaust manifolds is two, and the number of the second cylindrical portions is two, with each of the two second cylindrical portions extending into an exhaust port of a respective one of the two exhaust manifolds.

11. The heat shield of claim 10, wherein, A partition wall between the two exhaust manifolds is formed with a clearance space for mounting the second cylindrical portion.

12. The heat shield of claim 8, wherein, The heat shield further includes a gasket sleeved on the sidewall of the second cylindrical portion.

13. The heat shield of claim 8, wherein, One of an end surface of the mounting base plate and an end surface of the exhaust manifold mounting flange is formed with a second protrusion around the second cylindrical portion, and the other of the end surface of the mounting base plate and the end surface of the exhaust manifold mounting flange is formed with a second groove matched with the second protrusion.

14. The heat shield of claim 13, wherein, The second groove is V-shaped, U-shaped, or semi-circular.

15. A turbocharger characterized by, The turbocharger includes the heat shield according to any one of claims 1 to 14.

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