Novel air outlet shell of train supercharger

Abstract

The novel air outlet shell of the train supercharger comprises an air outlet shell body, urea spraying devices are fixedly installed at the tops of the two sides of the air outlet end of the air outlet shell body in a penetrating mode, a fixing frame is fixedly installed in an air outlet of the air outlet shell body, and a rotating shaft is rotationally connected to the middle of the fixing frame in a penetrating mode. Fixing frames are installed on the two sides of the bottom of the fixing frame, first fan blades located in the fixing frame are fixedly installed on the top of the rotating shaft, transmission rods are rotationally connected to the middles of the fixing frames, and second fan blades located in the fixing frames are fixedly installed at one ends of the transmission rods; and the other end of the transmission rod is in transmission connection with the bottom of the rotating shaft. The stable flowing state of air flow in the turbocharger is changed, waste gas and a urea solution are fully mixed, the space is saved, meanwhile, the mixing length is guaranteed, the mixing uniformity is improved, and then the mixing efficiency of the urea solution and the waste gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of turbocharging, in particular to a new type of air outlet housing for a train supercharger. Background Technique

[0002] For rail transit diesel locomotives, the diesel engine has a large power, a low back pressure and a small space. The tail gas purification of diesel locomotives usually adopts the mature selective catalytic reduction (SCR) method for denitrification. SCR consists of parts such as injection, mixing, and catalytic reaction, and a certain length of space in the gas flow direction is required to meet the working requirements. In the prior art, the urea mixer is arranged at the inlet of the SCR, the urea injector can inject urea into the urea mixer, a part of the urea will quickly evaporate on the surface of the urea mixer, and another part of the urea will be thrown into the high-temperature exhaust gas by centrifugal force and enter the SCR catalytic converter for chemical reaction after being mixed with the high-temperature exhaust gas.

[0003] However, due to the long pipeline between the air outlet end of the turbine of the supercharger and the inlet of the SCR, there is heat loss when the high-temperature exhaust gas enters the SCR from the supercharger, resulting in the exhaust gas temperature entering the SCR being lower than the exhaust gas temperature at the outlet of the turbine of the supercharger, which limits the urea injection amount, affects the mixing efficiency of the exhaust gas and urea at the local working condition point, and is prone to urea crystallization, resulting in an increase in the difficulty of controlling NOx emissions. At the same time, in the prior art, the urea solution and the exhaust gas cannot be effectively and fully mixed, further increasing the risk of urea crystallization and affecting denitrification.

[0004] Therefore, we propose a new type of air outlet housing for a train supercharger. Summary of the Invention

[0005] The purpose of the utility model is to provide a new type of air outlet housing for a train supercharger to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A new type of air outlet housing for a train supercharger, including an air outlet housing body, urea injection devices are fixedly installed through both sides of the top of the air outlet end of the air outlet housing body, a fixed frame is fixedly installed inside the air outlet of the air outlet housing body, a rotating shaft is rotatably connected through the middle of the fixed frame, fixed brackets are installed on both sides of the bottom of the fixed frame, a first fan blade located inside the fixed frame is fixedly installed at the top of the rotating shaft, a transmission rod is rotatably connected to the middle of the fixed bracket, a second fan blade located inside the fixed bracket is fixedly installed at one end of the transmission rod, and the other end of the transmission rod is in transmission connection with the bottom of the rotating shaft.

[0007] Optionally, a first bevel gear is fixedly installed at the bottom of the rotating shaft, a second bevel gear is fixedly installed at the other end of the transmission rod, and the two second bevel gears are respectively meshed with both sides of the first bevel gear.

[0008] Optionally, connection brackets are fixedly installed on the front and rear sides of the two fixing brackets, and a connecting cross plate in the middle of the connection bracket penetrates and is rotatably connected to the rotating shaft.

[0009] Optionally, the axis of the transmission rod coincides with the axis of the urea injection device, and the urea injection device is perpendicular to both sides of the outlet end of the air outlet shell housing.

[0010] Optionally, the urea injection device includes a mixing pipe fixedly installed through and sealed at the outlet end of the air outlet shell housing. One end of the mixing pipe is fixedly installed with an atomizing nozzle inside the air outlet shell housing, and the other end of the mixing pipe is integrally provided with a connecting flange outside the air outlet shell housing.

[0011] Optionally, another connecting flange is fixedly installed on the other side of the connecting flange. A gas supply pipe interface is provided on the other side of the other connecting flange, and a liquid supply pipe interface is provided on the other side of the other connecting flange and on one side of the gas supply pipe interface.

[0012] Optionally, a check valve is provided in the middle of the gas supply pipe interface.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. For the novel air outlet shell of the train supercharger, by setting the rotating shaft and the transmission rod, when the tail gas of the diesel engine flows through the air outlet of the air outlet shell housing, it drives the first fan blade and the rotating shaft to rotate. Then, through the first bevel gear and the second bevel gear, it drives the transmission rod to rotate, and further drives the second fan blade to rotate, disturbing the flow of the exhaust gas flowing through the air outlet of the air outlet shell housing, changing the stable flow state of the air flow in the turbocharger, enabling the exhaust gas and the urea solution to be fully mixed, saving space while ensuring the mixing length and increasing the mixing uniformity, thereby improving the mixing efficiency of the urea solution and the exhaust gas.

[0015] 2. For the novel air outlet shell of the train supercharger, by setting the urea injection device, high-pressure gas and liquid urea are respectively transported into the mixing pipe through the gas supply pipe interface and the liquid supply pipe interface for preliminary mixing, and then sprayed out through the atomizing nozzle. The urea solution continuously sprayed by the urea injection device is mixed with the exhaust gas discharged from the turbocharger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of a novel air outlet shell of a train supercharger of the present utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the air outlet shell housing of a novel air outlet shell of a train supercharger of the present utility model;

[0018] Figure 3 Schematic diagram of the fixed top frame of the new air outlet housing of a train supercharger of the present utility model;

[0019] Figure 4 Schematic diagram of the urea injection device of the new air outlet housing of a train supercharger of the present utility model.

[0020] In the figure: 1. Air outlet housing body; 2. Urea injection device; 21. Mixing pipe; 22. Connecting flange; 23. Atomizing nozzle; 24. Air supply pipe interface; 25. Liquid supply pipe interface; 3. Fixed frame; 4. Transmission shaft; 5. First fan blade; 6. Fixed bracket; 7. Connecting bracket; 8. Transmission rod; 9. Second fan blade; 10. First bevel gear; 11. Second bevel gear. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 to 4, the present utility model provides a new type of exhaust gas shell for a train supercharger, which includes an exhaust gas shell housing 1. On both sides of the top of the exhaust gas outlet end of the exhaust gas shell housing 1, a urea injection device 2 is fixedly installed through penetration. Inside the exhaust gas outlet of the exhaust gas shell housing 1, a fixed frame 3 is fixedly installed. In the middle of the fixed frame 3, a rotating shaft 4 is rotatably connected through penetration. On both sides of the bottom of the fixed frame 3, fixed brackets 6 are installed. At the top of the rotating shaft 4, a first fan blade 5 located inside the fixed frame 3 is fixedly installed. In the middle of the fixed bracket 6, a transmission rod 8 is rotatably connected. At one end of the transmission rod 8, a second fan blade 9 located inside the fixed bracket 6 is fixedly installed. The other end of the transmission rod 8 is in transmission connection with the bottom of the rotating shaft 4. At the bottom of the rotating shaft 4, a first bevel gear 10 is fixedly installed. At the other end of the transmission rod 8, a second bevel gear 11 is fixedly installed. The two second bevel gears 11 are respectively engaged with both sides of the first bevel gear 10. On the front and back sides of the two fixed brackets 6, connection brackets 7 are fixedly installed. The rotating shaft 4 is rotatably connected through penetration with the connection cross plate in the middle of the connection bracket 7. The axis of the transmission rod 8 coincides with the axis of the urea injection device 2. The urea injection device 2 is perpendicular to both sides of the exhaust gas outlet end of the exhaust gas shell housing 1. By setting the rotating shaft 4 and the transmission rod 8, when the diesel engine exhaust gas flows through the exhaust gas outlet of the exhaust gas shell housing 1, it drives the first fan blade 5 and the rotating shaft 4 to rotate. Then, through the first bevel gear 10 and the second bevel gear 11, it drives the transmission rod 8 to rotate, and further drives the second fan blade 9 to rotate, disturbing the flow of the exhaust gas flowing through the exhaust gas outlet of the exhaust gas shell housing 1, changing the stable flow state of the air flow in the turbocharger, enabling the exhaust gas and the urea solution to be fully mixed, saving space while ensuring the mixing length and increasing the mixing uniformity, thereby improving the mixing efficiency of the urea solution and the exhaust gas.

[0023] The urea injection device 2 includes a mixing pipe 21 fixedly installed through penetration and sealing at the exhaust gas outlet end of the exhaust gas shell housing 1. At one end of the mixing pipe 21, an atomizing nozzle 23 located inside the exhaust gas shell housing 1 is fixedly installed. At the other end of the mixing pipe 21, a connection flange 22 is integrally provided outside the exhaust gas shell housing 1. On the other side of the connection flange 22, another connection flange 22 is fixedly installed. On the other side of the other connection flange 22, a gas supply pipe interface 24 is provided. On the other side of the other connection flange 22, a liquid supply pipe interface 25 is provided on one side of the gas supply pipe interface 24. A check valve is provided in the middle of the gas supply pipe interface 24. By setting the urea injection device 2, high-pressure gas and liquid urea are respectively transported into the mixing pipe 21 through the gas supply pipe interface 24 and the liquid supply pipe interface 25 for preliminary mixing, and then sprayed out through the atomizing nozzle. The urea solution continuously sprayed by the urea injection device 2 is mixed with the exhaust gas discharged by the turbocharger.

[0024] Working principle:

[0025] By setting up the urea injection device 2, high-pressure gas and liquid urea are respectively transported into the mixing pipe 21 through the gas supply pipe interface 24 and the liquid supply pipe interface 25 for preliminary mixing, and then sprayed out through the atomizing nozzle. The urea solution continuously sprayed out by the urea injection device 2 is mixed with the exhaust gas discharged by the turbocharger. When the diesel engine exhaust gas flows through the air outlet of the air outlet shell 1, it drives the first fan blade 5 and the rotating shaft 4 to rotate, and then drives the transmission rod 8 to rotate through the first bevel gear 10 and the second bevel gear 11, and further drives the second fan blade 9 to rotate, disturbing the exhaust gas flowing through the air outlet of the air outlet shell 1, changing the stable flow state of the gas flow in the turbocharger, enabling the exhaust gas and the urea solution to be fully mixed, saving space while ensuring the mixing length and increasing the mixing uniformity, thereby improving the mixing efficiency of the urea solution and the exhaust gas.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new type of outlet housing for a train supercharger, comprising an outlet housing body (1), characterized in that, On both sides of the top of the outlet end of the outlet shell housing (1), a urea injection device (2) is fixedly installed through penetration. Inside the outlet of the outlet shell housing (1), a fixed frame (3) is fixedly installed. In the middle of the fixed frame (3), a rotating shaft (4) is rotatably connected through penetration. On both sides of the bottom of the fixed frame (3), fixed brackets (6) are installed. At the top of the rotating shaft (4), a first fan blade (5) located inside the fixed frame (3) is fixedly installed. In the middle of the fixed bracket (6), a transmission rod (8) is rotatably connected. At one end of the transmission rod (8), a second fan blade (9) located inside the fixed bracket (6) is fixedly installed. The other end of the transmission rod (8) is drivingly connected to the bottom of the rotating shaft (4).

2. The novel air outlet housing of a train supercharger according to claim 1, characterized in that, At the bottom of the rotating shaft (4), a first bevel gear (10) is fixedly installed. At the other end of the transmission rod (8), a second bevel gear (11) is fixedly installed. The two second bevel gears (11) are respectively meshed with both sides of the first bevel gear (10).

3. The novel air outlet housing of a train supercharger according to claim 1, characterized in that, On the front and back sides of the two fixed brackets (6), connection brackets (7) are fixedly installed. The rotating shaft (4) is rotatably connected through penetration with the connection cross plate in the middle of the connection bracket (7).

4. The novel air outlet housing of a train supercharger according to claim 1, characterized in that, The axis of the transmission rod (8) coincides with the axis of the urea injection device (2). The urea injection device (2) is perpendicular to both sides of the outlet end of the outlet shell housing (1).

5. The novel air outlet housing of a train supercharger according to claim 4, characterized in that, The urea injection device (2) includes a mixing pipe (21) fixedly installed through penetration and sealing at the outlet end of the outlet shell housing (1). At one end of the mixing pipe (21), an atomizing nozzle (23) located inside the outlet shell housing (1) is fixedly installed. At the other end of the mixing pipe (21), a connection flange (22) is integrally provided outside the outlet shell housing (1).

6. The novel air outlet housing of a train supercharger according to claim 5, characterized in that, On the other side of the connection flange (22), another connection flange (22) is fixedly installed. On the other side of another connection flange (22), a gas supply pipe interface (24) is provided. On the other side of another connection flange (22), a liquid supply pipe interface (25) is provided on one side of the gas supply pipe interface (24).

7. The novel air outlet housing of a train supercharger according to claim 6, characterized in that, A check valve is provided in the middle of the gas supply pipe interface (24).

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