Bypass afterburning type turbocharger

Abstract

The invention provides a bypass afterburning type turbocharger which comprises a turbocharger body, an air inlet pipe, an exhaust pipe and a combustion chamber. A first flow channel and a second flow channel are arranged on the two sides of the turbocharger body respectively. A turbine is arranged in the first flow channel, and a gas compressor impeller is arranged in the second flow channel. The combustion chamber communicates with the first flow channel through an air outlet pipe. A burner and a fuel spray head are arranged in the combustion chamber, and the combustion spray head is connected with the mixing cylinder through a fuel pipe; and the mixing cylinder is communicated with the air inlet pipe through a connecting pipe. The afterburning mechanism is additionally arranged outside the supercharger body, so that the low-speed performance and the supercharging effect of an engine are improved, and waste gas energy is utilized more efficiently.

Description

Technical Field

[0001] The invention belongs to the field of turbochargers, and in particular relates to a bypass afterburning turbocharger. Background Art

[0002] The traditional turbocharger body mainly uses the exhaust gas discharged by the engine to drive the turbine to rotate, which in turn drives the compressor to compress the intake air to increase the engine intake pressure and density, thereby increasing the engine power. However, the traditional design has a turbo hysteresis phenomenon, that is, the supercharging effect is not obvious at low speeds, and the exhaust gas energy is not fully utilized. Summary of the invention

[0003] In view of this, the present invention aims to propose a bypass afterburning turbocharger, which improves the low-speed performance and supercharging effect of the engine by adding a afterburning mechanism outside the turbocharger body, so as to more efficiently utilize the exhaust gas energy.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A bypass afterburning turbocharger comprises a turbocharger body, an air intake pipe, an exhaust pipe, and a combustion chamber. A first flow channel and a second flow channel are respectively arranged on both sides of the turbocharger body; a turbine is arranged in the first flow channel, and a compressor impeller is arranged in the second flow channel; the air intake pipe is connected to the second flow channel, and the combustion chamber is connected to the first flow channel through an air outlet pipe;

[0006] The combustion chamber is provided with a burner and a fuel nozzle, and the combustion nozzle is connected to a mixing cylinder through a fuel pipe; the mixing cylinder is further connected to the air intake pipe through a connecting pipe.

[0007] Furthermore, a first solenoid valve is provided on the connecting pipe between the mixing cylinder and the air intake pipe.

[0008] Furthermore, the fuel pipe is connected to a second solenoid valve at one end of the mixing chamber away from the combustion chamber.

[0009] Furthermore, a static spiral blade is provided in the mixing cylinder.

[0010] Furthermore, a high-pressure pulse tube is provided on one side of the fuel pipe.

[0011] Furthermore, the fuel nozzle is a hemispherical structure with a hollow interior, a fuel spray hole is penetrated through the side of the hemispherical structure, and a rotating shaft is rotatably mounted on the top of the hemispherical structure through a bearing, a small turbine blade is fixed to the rotating shaft, and a cleaning blade is fixed to the side of the rotating shaft, and the cleaning blade is closely attached to the surface of the hemispherical structure.

[0012] Compared with the prior art, the bypass afterburning turbocharger described in the present invention has the following advantages:

[0013] The bypass afterburning turbocharger of the present invention realizes efficient utilization of exhaust gas energy by adding a combustion chamber in the turbocharger body and ingeniously mixing the engine intake air with fuel and spraying it into the combustion chamber for secondary combustion, effectively solving the problem that the boosting effect of the traditional turbocharger body is not obvious at low speed, and significantly improving the boosting efficiency and engine performance. At the same time, through the setting of the solenoid valve, the supercharged fresh air is added into the combustion chamber, realizing accurate control of fuel supply and air mixing, and further ensuring the stability and sufficiency of the combustion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings constituting a part of the present invention 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 accompanying drawings:

[0015] Figure 1 A schematic diagram of a bypass afterburning turbocharger according to an embodiment of the present invention;

[0016] Figure 2 A cross-sectional view of a bypass afterburning turbocharger according to an embodiment of the present invention;

[0017] Figure 3 For the embodiment of the present invention Figure 2 A partial enlarged view of the part marked A.

[0018] Description of reference numerals:

[0019] 1. Supercharger body; 21. No. 1 flow channel; 22. No. 2 flow channel; 3. Turbine; 4. Compressor impeller; 5. Inlet pipe; 6. Exit pipe; 7. Combustion chamber; 8. Burner; 9. Fuel nozzle; 10. Fuel pipe; 11. Mixing cylinder; 12. Connecting pipe; 13. First solenoid valve; 14. Second solenoid valve; 15. Static spiral blade; 16. Rotating shaft; 17. Small turbine blade; 18. Cleaning scraper; 19. High-pressure pulse tube. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0024] like Figure 1-3As shown, a bypass regenerative turbocharger of the present invention comprises a turbocharger body 1, two flow channels are arranged on both sides of the turbocharger body 1, namely, a first flow channel 21 and a second flow channel 22, a turbine 3 is arranged in the first flow channel 21, and a compressor impeller 4 is arranged in the second flow channel 22; an intake pipe 5 is connected to the second flow channel 22, and a combustion chamber 7 is connected to the first flow channel 21 through an outlet pipe 6, the intake pipe 5 is connected to the intake manifold of the engine for delivering air into the engine, and the exhaust pipe 6 is connected to the exhaust manifold of the engine for discharging exhaust gas discharged during combustion. Specifically, the exhaust gas will drive the turbine 3 to rotate when it is discharged, and the turbine 3 will drive the compressor impeller 4 coaxially connected thereto to rotate when it rotates, so that air is automatically supplemented into the engine through the intake pipe 5, preferably In order to solve the problem that the boost effect of the traditional turbine is not obvious at low speed and the exhaust gas energy is not fully utilized, the exhaust pipe 6 is provided with a combustion chamber 7, and the combustion chamber 7 is provided with a burner 8 and a fuel nozzle 9. The fuel nozzle 9 is used to spray fuel into the combustion chamber 7. The burner 8 plays an ignition role. The combustion of the fuel in the combustion chamber 7 can generate high-temperature and high-pressure gas, thereby increasing the speed of the turbine 3 when starting at a low speed. The fuel nozzle 9 is connected to a fuel pipe 10, and the fuel pipe 10 is connected to a mixing cylinder 11. The mixing cylinder 11 is connected to the intake pipe 5 through a connecting pipe 12, so that a part of the air introduced into the engine by the intake pipe 5 can enter the mixing cylinder 11, and after being mixed with the fuel, it is sprayed into the combustion chamber 7, thereby ensuring that the fuel in the combustion chamber 7 is fully burned.

[0025] Preferably, a first solenoid valve 13 is connected between the intake pipe 5 and the mixing cylinder 11; the fuel pipe 10 is connected to a second solenoid valve 14 at one end of the mixing cylinder 11 away from the combustion chamber 7, and the other end of the second solenoid valve 14 is connected to the outlet of the engine intercooler to obtain fresh air with a lower temperature.

[0026] In some embodiments, a static spiral blade 15 is fixedly provided in the mixing barrel 11. The static spiral blade 15 allows the fuel and the air entering through the connecting pipe 12 to rotate and mix before flowing into the combustion chamber 7, so that the fuel and air are mixed evenly, thereby improving the combustion effect and making the combustion more complete.

[0027] A high-pressure pulse tube 19 is connected to the side of the fuel pipe 10. It can be understood that the fuel burned in the combustion chamber 7 is mainly the residual fuel in the exhaust gas, which will make the fuel nozzle 9 easily blocked. By connecting the high-pressure pulse tube 19 to an external compressor device, high-pressure pulse gas can be injected into the fuel nozzle 9 to clear the blockage.

[0028] Furthermore, the fuel nozzle 9 is a hemispherical structure with a hollow interior, and a fuel spray hole is penetrated through the side of the hemispherical structure, and a rotating shaft 16 is rotatably installed on the top of the hemispherical structure through a bearing, and a small turbine blade 17 is fixed to the rotating shaft 16, and a cleaning scraper 18 is fixed to the side of the rotating shaft 16. The cleaning scraper 18 is closely attached to the surface of the hemispherical structure. When high-pressure pulse gas is used for clearing blockage, the high-pressure gas will push the small turbine blade 17 to rotate. When the small turbine blade 17 rotates, it will drive the cleaning scraper 18 to scrape the surface of the fuel nozzle 9 through the rotating shaft 16, thereby scraping off the dirt on the surface of the fuel nozzle 9.

[0029] The power turbocharger body with built-in combustion in the supercharger body proposed by the present invention adds a combustion chamber in the exhaust pipe of the traditional turbocharger body, and uses the high-temperature and high-pressure gas generated by the combustion of the fuel in the combustion chamber to enhance the start-up and rotation speed of the turbine at low speed, thereby improving the supercharging effect. At the same time, a part of the engine intake air is introduced into the mixing barrel and mixed with the fuel before being sprayed into the combustion chamber to ensure that the fuel is fully burned.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bypass afterburning turbocharger, characterized in that: It includes a supercharger body, an air intake pipe, an exhaust pipe, and a combustion chamber. A first flow channel and a second flow channel are respectively provided on both sides of the supercharger body; a turbine is provided in the first flow channel, and a compressor impeller is provided in the second flow channel; the air intake pipe is connected to the second flow channel, and the combustion chamber is connected to the first flow channel through the air outlet pipe; The combustion chamber is provided with a burner and a fuel nozzle, and the combustion nozzle is connected to a mixing cylinder through a fuel pipe; the mixing cylinder is further connected to the air intake pipe through a connecting pipe.

2. A bypass afterburning turbocharger according to claim 1, characterized in that: A first solenoid valve is provided on the connecting pipe between the mixing cylinder and the air inlet pipe.

3. The bypass afterburning turbocharger according to claim 1, characterized in that: The fuel pipe is connected to a second solenoid valve at one end of the mixing chamber away from the combustion chamber.

4. A bypass afterburning turbocharger according to claim 1, characterized in that: The mixing cylinder is provided with static spiral blades.

5. The bypass afterburning turbocharger according to claim 1, characterized in that: A high-pressure pulse tube is provided on one side of the fuel pipe.

6. The bypass afterburning turbocharger according to claim 1, characterized in that: The fuel nozzle is a hemispherical structure with a hollow interior, a fuel spray hole is penetrated through the side of the hemispherical structure, and a rotating shaft is rotatably mounted on the top of the hemispherical structure through a bearing, a small turbine blade is fixed to the rotating shaft, and a cleaning blade is fixed to the side of the rotating shaft, and the cleaning blade is closely attached to the surface of the hemispherical structure.

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