A turbine housing for preventing airflows from interfering with each other

Abstract

The present invention provides a turbine shell for preventing airflows from interfering with each other, including a volute, a turbine chamber, an air inlet, an exhaust duct and a first vortex air distribution duct are arranged on the volute, the turbine chamber is arranged in the volute, the air inlet, the first vortex air distribution duct, the turbine chamber and the exhaust duct are connected in sequence, and a straight exhaust duct and a valve mounting portion are also arranged on the volute; the straight exhaust duct is used to connect the air inlet and the exhaust duct, and the valve mounting portion is arranged on the straight exhaust duct; it also includes an annular air guide cylinder, the first end of the annular air guide cylinder is fixedly connected to the inner wall of the volute, and the second end extends toward a side away from the turbine chamber, an annular air duct is formed on the outside of the annular air guide cylinder, and the annular air duct is connected with the exhaust duct. The present application guides the gas in the straight exhaust duct through the annular air guide duct, so that the gas discharged from the exhaust duct is smoothly collected in the exhaust duct, the generation of turbulence is reduced, the air pressure fluctuation is reduced, and the stability of the opening and closing of the bypass valve is improved.

Description

Technical Field

[0001] The invention relates to the technical field of engine turbochargers, and in particular to a turbine shell for preventing airflows from interfering with each other. Background Art

[0002] The turbocharger fully utilizes the heat, kinetic and pressure energy contained in the high-temperature exhaust gas discharged from the exhaust pipe to blow the turbine to rotate at high speed, thereby driving the compressor impeller on the same shaft to rotate at high speed, increasing the density of the air entering the engine cylinder, increasing the engine's air intake, improving the engine's power, reducing fuel consumption, reducing exhaust pollution, and reducing emission levels, with energy-saving and environmental protection effects. At the same time, this technology is an important means of restoring engine power in plateau areas, allowing the engine to adapt to the operating requirements of different altitudes.

[0003] At present, the exhaust gas outlet of the turbine shell of the common turbocharger with a bypass valve is not designed with an anti-interference cavity structure. The exhaust gas that does not participate in the expansion work is directly discharged through the bleed valve hole on the turbine shell, and meets the exhaust gas after normal expansion work at the turbine hub, causing airflow interference and affecting the opening and closing of the bleed valve, which has a certain impact on the matching operation of the supercharger and the engine, generates airflow noise, and greatly reduces the comfort of the supercharger.

[0004] In summary, there is an urgent need for a turbine that can prevent airflows from interfering with each other and can solve or at least partially solve the problems existing in the prior art. Summary of the invention

[0005] The present invention aims to provide a turbine housing that prevents airflows from interfering with each other, and aims to solve the problem in the existing equipment that the gas discharged from the exhaust gas outlet and the gas discharged directly from the bleed valve hole without doing work collide to generate turbulence, resulting in pressure fluctuations near the bypass valve and causing unstable opening and closing of the bypass valve. The specific technical solution is as follows:

[0006] A turbine shell for preventing airflows from interfering with each other comprises a volute shell, a turbine chamber, an air inlet, an exhaust passage and a first vortex air distribution passage are arranged on the volute shell, the turbine chamber is arranged in the volute shell, the first vortex air distribution passage is arranged around the circumference of the turbine chamber, and the inner side of the first vortex air distribution passage is connected with the turbine chamber; the exhaust passage is arranged along the axial direction of the volute shell, and the first end of the exhaust passage is connected with the turbine chamber, and the second end of the exhaust passage extends to the outside of the volute shell in a direction away from the turbine chamber, the first end of the air inlet passage is connected with the first vortex air distribution passage, and the second end of the air inlet passage extends to the volute shell The vortex casing is externally arranged, and a straight exhaust channel and a valve mounting portion are also provided on the vortex casing; the first end of the straight exhaust channel is connected to the air inlet channel or the first vortex air distribution channel, the second end of the straight exhaust channel is connected to the exhaust channel, and the valve mounting portion is arranged in the middle of the straight exhaust channel; it also includes an annular air guide cylinder, which is arranged in the vortex casing, and the first end of the annular air guide cylinder is fixedly connected to the inner wall of the vortex casing, and the second end of the annular air guide cylinder extends toward a side away from the turbine chamber, and an annular air channel is formed between the outer wall of the annular air guide cylinder and the inner wall of the air outlet end of the straight exhaust channel, and the annular air channel is connected to the exhaust channel.

[0007] Furthermore, the straight exhaust duct includes an intake section and an exhaust section, the valve mounting portion is arranged at the connection between the intake section and the exhaust section, one end of the intake section away from the valve mounting portion is connected to the intake duct or the first vortex air distribution duct, and one end of the exhaust section away from the valve mounting portion is connected to the exhaust duct.

[0008] Furthermore, a guide surface is provided at one end of the exhaust section close to the annular air guide cylinder.

[0009] Further, the air inlet duct is communicated with the air inlet end of the first vortex air distribution duct, and the air inlet duct is arranged tangentially along the first vortex air distribution duct.

[0010] Furthermore, it also includes a second vortex air distribution duct, which is arranged side by side with the first vortex air distribution duct, and the inner side of the second vortex air distribution duct is connected to the turbine chamber, and the second vortex air distribution duct is connected to the air intake section.

[0011] Furthermore, the turbine housing also includes a connecting column, a first end of which is connected to the inner wall of the volute, and a second end of which is fixedly connected to an end of the annular air guide cylinder away from the turbine chamber.

[0012] Furthermore, a plurality of connecting columns are arranged, and the plurality of connecting columns are arranged in an annular manner at intervals along the annular air guide cylinder.

[0013] Furthermore, a screw mounting portion is arranged at the exhaust port of the volute exhaust duct, and a plurality of screw mounting portions are arranged, and the plurality of screw mounting portions are arranged at intervals around one end of the exhaust duct away from the first vortex air distribution duct.

[0014] Furthermore, the screw mounting parts and the connecting columns are arranged in a one-to-one correspondence.

[0015] Furthermore, reinforcing ribs are arranged on the outer wall of the volute, and a plurality of reinforcing ribs are arranged at intervals along the circumference of the volute.

[0016] The application of the technical solution of the present invention has the following beneficial effects:

[0017] Through the above design, the gas discharged from the straight exhaust channel flows along the annular air channel at the end of the straight exhaust channel, and enters the exhaust channel tangentially along the annular air channel. The gas passing through the turbine chamber is discharged from the exhaust channel. The two air flows are tangential when flowing, so no violent turbulence is generated, so that the gas discharged from the turbine chamber and the gas discharged from the straight exhaust channel can both flow stably, so that the gas pressure in the straight exhaust channel tends to be stable, and the bypass valve can work stably. Because the turbulent flow situation is alleviated, the noise generated by air vibration is further reduced, making the turbocharger quieter when working. In addition, the reduced vibration further increases the service life of the turbine shell and reduces the failure rate.

[0018] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Figure 1-Figure 4 , the present invention is further described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of a turbine shell for preventing airflows from interfering with each other according to the present invention;

[0021] Figure 2 It is one of the schematic diagrams of the internal structure of a turbine housing for preventing airflows from interfering with each other according to the present invention;

[0022] Figure 3 yes Figure 2 Magnified view at A in the middle;

[0023] Figure 4 This is the second schematic diagram of the internal structure of a turbine housing for preventing airflows from interfering with each other according to the present invention.

[0024] Among them, 1. volute; 11. turbine chamber; 12. inlet duct; 13. exhaust duct; 14. first vortex air duct; 15. straight exhaust duct; 151. inlet section; 152. exhaust section; 1521. guide surface; 16. valve mounting part; 17. second vortex air duct; 18. screw mounting part; 19. reinforcing rib; 2. annular air guide cylinder; 3. connecting column. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] Example:

[0028] See also Figure 1-Figure 4 The present embodiment provides a turbine shell for preventing airflows from interfering with each other, including a volute 1, on which a turbine chamber 11, an air inlet duct 12, an exhaust duct 13 and a first vortex air distribution duct 14 are arranged. The turbine chamber 11 is arranged in the volute 1, and the first vortex air distribution duct 14 is arranged around the circumference of the turbine chamber 11, and the inner side of the first vortex air distribution duct 14 is connected to the turbine chamber 11; the exhaust duct 13 is arranged axially along the volute 1, and a first end of the exhaust duct 13 is connected to the turbine chamber 11, and a second end of the exhaust duct 13 extends to the outside of the volute 1 in a direction away from the turbine chamber 11, and a first end of the air inlet duct 12 is connected to the first vortex air distribution duct 14, and a first end of the air inlet duct 12 is connected to the first vortex air distribution duct 14. The two ends extend to the outside of the volute 1, and a straight exhaust channel 15 and a valve mounting portion 16 are also provided on the volute 1; the first end of the straight exhaust channel 15 is connected to the air inlet channel 12 or the first vortex air distribution channel 14, the second end of the straight exhaust channel 15 is connected to the exhaust channel 13, and the valve mounting portion 16 is arranged in the middle of the straight exhaust channel 15; it also includes an annular air guide cylinder 2, the annular air guide cylinder 2 is arranged in the volute 1, and the first end of the annular air guide cylinder 2 is fixedly connected to the inner wall of the volute 1, and the second end of the annular air guide cylinder 2 extends toward a side away from the turbine chamber 11, and an annular air channel is formed between the outer wall of the annular air guide cylinder 2 and the inner wall of the air outlet end of the straight exhaust channel 15, and the annular air channel is connected to the exhaust channel 13.

[0029] Specifically, the valve installation portion 16 is used to install the bypass valve, and through the bypass valve, the excess gas is directly discharged from the bypass valve through the exhaust duct 13. The turbine chamber 11 is used to install the turbine, and the gas enters the turbine chamber 11 from the first vortex air distribution duct 14, and drives the turbine to rotate, and the air flow rate decreases, and finally discharged from the exhaust duct 13.

[0030] It should be noted that in the original design, the gas flowing out of the bypass valve flows directly and vertically to the exhaust port of the exhaust passage 13, thereby increasing the pressure at the exhaust port and forming turbulence at the exhaust port. The generation of turbulence is likely to cause pressure fluctuations at the exhaust port, resulting in unstable operation of the bypass valve and easy failure. However, through the above design, the gas discharged from the straight exhaust channel flows along the annular air channel at the end of the straight exhaust channel, and enters the exhaust passage 13 tangentially along the annular air channel. The gas passing through the turbine chamber 11 is discharged from the exhaust passage 13. The two air flows are tangential when flowing, so no violent turbulence is generated, so that the gas discharged from the turbine chamber 11 and the gas discharged from the straight exhaust passage 15 can flow stably, so that the gas pressure in the straight exhaust passage 15 tends to be stable, so that the bypass valve can work stably, and because the turbulence is alleviated, the noise generated by air vibration is further reduced, so that the turbocharger is quieter when working, and because the vibration is reduced, the service life of the turbine shell is further increased and the failure rate is reduced.

[0031] It is worth noting that one end of the turbine chamber 11 away from the exhaust passage 13 is open, and the turbine can be conveniently installed in the turbine chamber 11 through the opening.

[0032] Furthermore, the straight exhaust channel 15 includes an intake section 151 and an exhaust section 152, and the valve mounting portion 16 is arranged at the connection between the intake section 151 and the exhaust section 152, and one end of the intake section 151 away from the valve mounting portion 16 is connected to the intake channel 12, and one end of the exhaust section 152 away from the valve mounting portion 16 is connected to the exhaust channel 13.

[0033] Specifically, the valve installation portion 16 is used to install a bypass valve, which controls the on-off of the straight exhaust channel 15 . When the bypass valve is opened, the gas can directly pass through the straight exhaust channel 15 and be discharged through the exhaust channel 13 .

[0034] It can be known that part of the gas in the intake duct 12 is discharged directly from the exhaust duct 13 through the exhaust section 152 through the intake section 151 under the control of the bypass valve, thereby preventing excessive pressure in the turbine and protecting the safe operation of the turbine.

[0035] It should be noted that in some other embodiments of the present application, the air intake section 151 is connected to the first vortex air distribution duct 14 , and part of the gas entering the first vortex air distribution duct 14 is directly discharged from the exhaust duct 13 through the air intake section 151 and the exhaust section 152 .

[0036] Furthermore, a guide surface 1521 is provided at one end of the exhaust section 152 close to the annular air guide cylinder 2 .

[0037] Specifically, in this embodiment, the guide surface 1521 is a conical surface. It can be known that the conical surface is connected to the cylindrical surface at the end of the exhaust section 152, and the gas in the annular airway is guided by the conical surface, so that the flow direction of the gas in the annular airway is tangent to or forms a small angle with the flow direction of the gas in the exhaust duct 13, thereby reducing the collision between the gas flowing out of the exhaust duct 13 and the gas flowing out of the annular airway as much as possible, thereby reducing the generation of turbulence.

[0038] Furthermore, the air inlet passage 12 is communicated with the air inlet end of the first scroll air distribution passage 14 , and the air inlet passage 12 is arranged tangentially along the first scroll air distribution passage 14 .

[0039] It can be known that by arranging the air inlet duct 12 and the first vortex air duct 14 tangentially, the gas entering from the air inlet duct 12 can smoothly transition into the first vortex air duct 14, reducing the generation of turbulence during the flow of the airflow, thereby reducing the energy loss of the airflow during the flow process and reducing the noise of the airflow.

[0040] Furthermore, it also includes a second vortex air distribution duct 17 , which is arranged side by side with the first vortex air distribution duct 14 , and the inner side of the second vortex air distribution duct 17 is connected to the turbine chamber 11 , and the second vortex air distribution duct 17 is connected to the air intake section 151 .

[0041] It can be known that by arranging the first vortex air distribution duct 14 and the second vortex air distribution duct 17, and arranging the two air distribution ducts side by side, the turbine works under the impetus of the first vortex air distribution duct 14 and the second vortex air distribution duct 17 at the same time, because the gas in the two air distribution ducts simultaneously drives the same turbine to rotate, so that the turbine is more powerful when rotating, thereby making the turbine response faster, reducing the turbine hysteresis phenomenon, and more effectively utilizing the exhaust gas energy to improve the efficiency of the turbocharger. When the pressure in the second vortex air distribution duct 17 is too high, the excess gas can be discharged through the intake section 151 to achieve the purpose of reducing the pressure.

[0042] Furthermore, the turbine housing further comprises a connecting column 3 , a first end of which is connected to the inner wall of the volute 1 , and a second end of which is fixedly connected to an end of the annular air guide cylinder 2 away from the turbine chamber 11 .

[0043] It can be known that because the turbine is driven by the exhaust gas discharged from the engine, the temperature of the gas entering the turbine is very high. The annular air guide cylinder 2 is arranged in the turbine shell. Because the annular air guide cylinder 2 extends upward, if the annular air guide cylinder 2 at one end away from the turbine chamber 11 is not fixed, the strength of the annular air guide cylinder 2 is reduced under the baking effect of high temperature, and the upper end of the air guide cylinder is relatively weak, which is easy to cause damage to the annular air guide cylinder 2. The connection stability between the upper end of the annular air guide cylinder 2 and the turbine shell is increased by setting the connecting column 3, the rigidity of the upper end of the annular air guide cylinder 2 is improved, and the service life of the annular air guide cylinder 2 is increased.

[0044] Furthermore, a plurality of connecting columns 3 are arranged, and the plurality of connecting columns 3 are evenly spaced in an annular manner along the annular air guide cylinder 2 .

[0045] It can be known that by evenly spacing a plurality of connecting columns 3 along the upper end of the annular air guide tube 2, the circumferential positions of the annular air guide tube 2 are strengthened simultaneously by the plurality of connecting columns 3, which, on the one hand, improves the structural strength of the annular conductor tube, and on the other hand, makes the thickness of the annular airway at the end of the exhaust section 152 uniform, thereby stabilizing the airflow in the annular airway.

[0046] Furthermore, a screw mounting portion 18 is arranged at the exhaust port of the exhaust passage 13 of the volute 1 , and a plurality of screw mounting portions 18 are arranged, and the plurality of screw mounting portions 18 are evenly spaced around one end of the exhaust passage 13 away from the first volute air distribution passage 14 .

[0047] It can be known that, by setting the screw mounting portion 18, the turbine housing can be conveniently connected to the tail pipe of the automobile, so that the gas in the exhaust duct 13 can smoothly enter the tail pipe of the automobile and be discharged from the tail pipe.

[0048] Furthermore, the screw mounting portions 18 are arranged in one-to-one correspondence with the connecting columns 3 .

[0049] It can be known that a screw hole needs to be set at the screw mounting portion 18, and the wall thickness of the turbine casing 1 is relatively thin. If the screw mounting portion 18 is set at other positions, the screw mounting portion 18 needs to be set larger, otherwise it is easy to drill through the wall of the turbine casing 1 when drilling the screw hole on the screw mounting portion 18. If the screw mounting portion 18 is set corresponding to the connecting column 3, the part of the screw hole on the screw mounting portion 18 can be inserted into the connecting column 3, so that the screw mounting portion 18 can be set more compactly, saving materials while reducing the volume of the turbine casing.

[0050] Furthermore, a reinforcing rib 19 is arranged on the outer wall of the volute 1 , and a plurality of reinforcing ribs 19 are arranged, and the plurality of reinforcing ribs 19 are arranged at intervals along the circumferential direction of the volute 1 .

[0051] It can be known that the overall strength of the turbine housing is improved by arranging the reinforcing ribs 19 .

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A turbine casing for preventing airflows from interfering with each other, comprising a volute (1), the volute (1) being provided with a turbine chamber (11), an air inlet (12), an exhaust passage (13) and a first vortex air distribution passage (14), the turbine chamber (11) being arranged in the volute (1), the first vortex air distribution passage (14) being arranged around the circumference of the turbine chamber (11), and the inner side of the first vortex air distribution passage (14) being communicated with the turbine chamber (11); the exhaust passage (13) being arranged axially along the volute (1), the first end of the exhaust passage (13) being communicated with the turbine chamber (11), the second end of the exhaust passage (13) being extended to the outside of the volute (1) in a direction away from the turbine chamber (11), the first end of the air inlet passage (12) being communicated with the first vortex air distribution passage (14), the second end of the air inlet passage (12) being extended to the outside of the volute (1), and characterized in that: The volute (1) is also provided with a straight exhaust channel (15) and a valve mounting portion (16); The first end of the straight exhaust channel (15) is in communication with the air inlet channel (12) or the first vortex air distribution channel (14), the second end of the straight exhaust channel (15) is in communication with the exhaust channel (13), and the valve mounting portion (16) is arranged in the middle of the straight exhaust channel (15); It also includes an annular air guide cylinder (2), which is arranged in the volute (1), and the first end of the annular air guide cylinder (2) is fixedly connected to the inner wall of the volute (1), and the second end of the annular air guide cylinder (2) extends toward a side away from the turbine chamber (11), and an annular air passage is formed between the outer wall of the annular air guide cylinder (2) and the inner wall of the outlet end of the straight exhaust channel (15), and the annular air passage is connected to the exhaust channel (13).

2. A turbine housing for preventing airflows from interfering with each other according to claim 1, characterized in that: The straight exhaust channel (15) comprises an air intake section (151) and an exhaust section (152); the valve mounting portion (16) is arranged at the connection between the air intake section (151) and the exhaust section (152); one end of the air intake section (151) away from the valve mounting portion (16) is connected to the air intake channel (12) or the first vortex air distribution channel (14); and one end of the exhaust section (152) away from the valve mounting portion (16) is connected to the exhaust channel (13).

3. A turbine housing for preventing airflows from interfering with each other according to claim 2, characterized in that: A guide surface (1521) is provided at one end of the exhaust section (152) close to the annular air guide cylinder (2).

4. A turbine housing for preventing airflows from interfering with each other according to any one of claims 1 to 3, characterized in that: The air inlet duct (12) is in communication with the air inlet end of the first vortex air distribution duct (14), and the air inlet duct (12) is arranged tangentially along the first vortex air distribution duct (14).

5. A turbine housing for preventing airflows from interfering with each other according to claim 2, characterized in that: The invention also comprises a second vortex air distribution duct (17), wherein the second vortex air distribution duct (17) and the first vortex air distribution duct (14) are arranged side by side, and the inner side of the second vortex air distribution duct (17) is connected to the turbine chamber (11), and the second vortex air distribution duct (17) is connected to the air intake section (151).

6. A turbine housing for preventing airflows from interfering with each other according to any one of claims 1 to 3 or 5, characterized in that: The turbine housing further comprises a connecting column (3), a first end of the connecting column (3) being connected to the inner wall of the volute housing (1), and a second end of the connecting column (3) being fixedly connected to an end of the annular air guide cylinder (2) away from the turbine chamber (11).

7. A turbine housing for preventing airflows from interfering with each other according to claim 6, characterized in that: A plurality of connecting columns (3) are arranged, and the plurality of connecting columns (3) are arranged at annular intervals along the annular air guide cylinder (2).

8. A turbine housing for preventing airflows from interfering with each other according to claim 7, characterized in that: A screw mounting portion (18) is arranged at the exhaust port of the exhaust duct (13) of the volute (1), and a plurality of the screw mounting portions (18) are arranged, and the plurality of the screw mounting portions (18) are arranged at intervals around one end of the exhaust duct (13) away from the first vortex air distribution duct (14).

9. A turbine housing for preventing airflows from interfering with each other according to claim 8, characterized in that: The screw mounting portions (18) are arranged in one-to-one correspondence with the connecting columns (3).

10. A turbine housing for preventing airflows from interfering with each other according to any one of claims 1 to 3, characterized in that: A reinforcing rib (19) is arranged on the outer wall of the volute (1), a plurality of the reinforcing ribs (19) are arranged, and the plurality of the reinforcing ribs (19) are arranged at intervals along the circumference of the volute (1).

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