Evaporating pipe and oil-gas mixing device

Abstract

The invention relates to the technical field of aero-engines, and discloses an evaporation pipe and an oil-gas mixing device.The evaporation pipe comprises a first pipe body and a second pipe body, a sealing plate is arranged at the first end of the first pipe body, a plurality of first gas inlet holes are formed in the sealing plate, and a plurality of second gas inlet holes are formed in the side wall of the first pipe body; the multiple first air inlet holes and the multiple second air inlet holes are used for inputting high-pressure gas, and a penetrating hole used for inputting fuel oil is formed in the side wall of the first pipe body; the first end of the second pipe body is connected and communicated with the second end of the first pipe body, a first bending angle is arranged at the joint of the first pipe body and the second pipe body, and the second end of the second pipe body is used for being communicated with an engine ignition area. According to the evaporation pipe and the oil-gas mixing device, the problems that the fuel oil atomization and evaporation effect is poor, and an engine is difficult to ignite are solved or improved.

Description

Technical Field

[0001] The present application relates to the technical field of aero-engines, and in particular to an evaporator tube and an oil-gas mixing device. Background Art

[0002] The design and processing of the oil-gas mixing device in the combustion chamber of small and medium-sized aircraft engines is complicated. The oil-gas mixing device includes an evaporator tube structure, which is used to mix air and fuel to improve combustion efficiency.

[0003] In the related art, the evaporator is a fuel preparation device, which concentrates the process of mixing fuel and air inside the evaporator and sprays the oil-air mixture at the outlet of the evaporator.

[0004] However, the atomization effect of the evaporator tube on the fuel is always limited, and it is difficult to meet the requirements of modern small and medium-sized aircraft engines for fuel atomization. The atomization evaporation effect of the evaporator tube is poor, which makes it difficult to ignite the engine. Summary of the invention

[0005] In view of this, the present application provides an evaporator tube and an oil-gas mixing device to solve or improve the problem of poor fuel atomization and evaporation effect and difficult engine ignition.

[0006] In a first aspect, the present application provides an evaporation tube, comprising:

[0007] A first tube body, a first end of which is provided with a sealing plate, a plurality of first air inlet holes are formed on the sealing plate, a plurality of second air inlet holes are formed on a side wall of the first tube body, the plurality of first air inlet holes and the plurality of second air inlet holes are used to input high-pressure gas, and a through hole is formed on the side wall of the first tube body for inputting fuel;

[0008] The first end of the second tube body is connected and communicated with the second end of the first tube body. A first bending angle is provided at the connection between the first tube body and the second tube body. The second end of the second tube body is used to communicate with the engine ignition area.

[0009] In this embodiment, high-pressure air enters the first tube body from the plurality of first air inlet holes and the plurality of second air inlet holes, and the plurality of first air inlet holes and the plurality of second air inlet holes can increase the flow rate of air, and the fuel enters the first tube body from the perforations, and mixes with the air in the first tube body to form an oil-gas mixture, and the high-speed airflow in the first tube body atomizes the fuel, thereby improving the fuel atomization effect, and a first bending angle is provided at the connection between the first tube body and the second tube body, and when the oil-gas mixture passes through the first bending angle, turbulence occurs, thereby improving the mixing effect of air and fuel, and improving the atomization effect of the fuel. The fully mixed oil-gas mixture is transported to the engine ignition area for ignition, thereby reducing the difficulty of ignition.

[0010] In an optional embodiment, the sum of the ventilation areas of the multiple first air inlet holes is a first total area, the sum of the ventilation areas of the multiple second air inlet holes is a second total area, and the sum of the first total area and the second total area is greater than the air inlet area of ​​the first tube body.

[0011] In an optional embodiment, the second tube body includes:

[0012] a first pipe section, a first end of which is connected and communicated with the second end of the first pipe body, and a first bending angle is provided at a connection between the first pipe section and the first pipe body;

[0013] The second pipe segment has a first end connected and communicated with the second end of the first pipe segment, the first end of the second pipe segment has a circular cross section, and the second end of the second pipe segment has an oval cross section.

[0014] In an optional embodiment, a second bending angle is provided at the connection between the first pipe segment and the second pipe segment.

[0015] In an optional implementation, the first bending angle is 90°.

[0016] In a second aspect, the present application also provides an oil-gas mixing device, comprising:

[0017] The evaporation tube;

[0018] A cavity is provided with a gas delivery hole, the cavity is spirally wound, the outer walls of the cavity form the engine ignition zone and the gas outlet channel connected to the engine ignition zone, the cavity wall of the cavity is provided with a plurality of vents connected to the engine ignition zone, the first tube is arranged in the cavity, the cavity wall of the cavity is provided with a mounting hole connected to the engine ignition zone, the second end of the first tube is connected to the mounting hole, the first end of the second tube is connected to the mounting hole, and the second tube is arranged in the engine ignition zone;

[0019] An oil injection mechanism, wherein an oil injection end of the oil injection mechanism penetrates through the cavity and the tube wall of the first tube body and is communicated with the inner cavity of the first tube body;

[0020] An air pump is communicated with the air delivery hole.

[0021] In this embodiment, the injection end of the injection mechanism delivers fuel into the first tube body, and the air pump delivers air to the cavity through the air delivery hole, the air pressure in the cavity increases, and the air in the cavity enters the first tube body through multiple first air inlet holes and multiple second air inlet holes, and is accelerated by the first air inlet holes and the second air inlet holes to form high-pressure air, which flows in the first tube body, atomizes the fuel in the first tube body, and is delivered to the engine ignition zone through the second tube body, and the air in the cavity is delivered to the engine ignition zone through multiple air holes, and is ignited in the engine ignition zone, and the oil-gas mixture is ignited, and the gas in the engine ignition zone rapidly expands and is ejected from the air outlet channel to provide power.

[0022] In an optional embodiment, an outer wall of the cavity is provided with a curved surface, the curved surface is arranged corresponding to the second end of the second tube body, and the curved surface is used to increase the airflow turbulence in the ignition zone of the engine.

[0023] In an optional embodiment, a through hole is formed in the cavity corresponding to the through hole, and the injection end of the injection mechanism passes through the through hole and the through hole in sequence and is connected with the first tube body.

[0024] In an optional embodiment, along the axial direction of the first tube body, a plurality of the second air inlet holes are arranged between the sealing plate and the through holes.

[0025] In an optional embodiment, the evaporation tube is provided in plurality;

[0026] The oil injection mechanism comprises:

[0027] A plurality of fuel injection nozzles, wherein the plurality of fuel injection nozzles are connected to the plurality of evaporation tubes in a one-to-one correspondence;

[0028] A fuel delivery pipe is connected to the plurality of fuel injection nozzles. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic diagram of the structure of an evaporation tube according to an embodiment of the present application;

[0031] Figure 2 A cross-sectional view of an oil-gas mixing device according to an embodiment of the present application;

[0032] Figure 3 This is a schematic structural diagram of an oil supply mechanism, an evaporation tube, and an inner wall of a cavity in an oil-gas mixing device according to an embodiment of the present application;

[0033] Figure 4 This is a cross-sectional view of an evaporator pipe and a fuel injector in an oil-gas mixing device according to an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1. First tube body; 2. Sealing plate; 3. First air inlet hole; 4. Second air inlet hole; 5. Perforation; 6. Second tube body; 601. First tube section; 602. Second tube section; 7. Cavity; 701. Air delivery hole; 702. Engine ignition zone; 703. Air outlet channel; 8. Arc surface; 9. Fuel injection mechanism; 901. Fuel injection nozzle; 902. Fuel delivery pipe. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0037] The design and processing of the oil-gas mixing device in the combustion chamber of small and medium-sized aircraft engines is complicated. The oil-gas mixing device includes an evaporator tube structure, which is used to mix air and fuel to improve combustion efficiency.

[0038] In the related art, the evaporator is a fuel preparation device, which concentrates the process of mixing fuel and air inside the evaporator and sprays the oil-air mixture at the outlet of the evaporator.

[0039] However, the atomization effect of the evaporator on the fuel is always limited, and it is difficult to meet the requirements of modern small and medium-sized aircraft engines for the fuel atomization effect. The evaporator has poor atomization and evaporation effect, which leads to difficulty in engine ignition. Therefore, the present application provides an evaporator and an oil-gas mixing device to solve or improve the problem of poor fuel atomization and evaporation effect and difficulty in engine ignition.

[0040] Combine the following Figures 1 to 4 , describing an embodiment of the present application.

[0041] According to an embodiment of the present application, on one hand, an evaporation tube is provided, comprising: a first tube body 1 and a second tube body 6 .

[0042] Specifically, Figure 1As shown, a sealing plate 2 is provided at the first end of the first tube body 1, a plurality of first air inlet holes 3 are provided on the sealing plate 2, a plurality of second air inlet holes 4 are provided on the side wall of the first tube body 1, the plurality of first air inlet holes 3 and the plurality of second air inlet holes 4 are used to input high-pressure gas, and a through hole 5 is provided on the side wall of the first tube body 1 for inputting fuel;

[0043] The first end of the second tube body 6 is connected and communicated with the second end of the first tube body 1 . A first bending angle is provided at the connection between the first tube body 1 and the second tube body 6 . The second end of the second tube body 6 is used to communicate with the engine ignition area 702 .

[0044] In this embodiment, if Figure 1 As shown, high-pressure air enters the first tube body 1 from multiple first air inlet holes 3 and multiple second air inlet holes 4, which can increase the flow rate of air. Fuel enters the first tube body 1 from the perforation 5 and mixes with air in the first tube body 1 to form an oil-gas mixture. The high-speed airflow in the first tube body 1 atomizes the fuel to improve the fuel atomization effect. A first bending angle is provided at the connection between the first tube body 1 and the second tube body 6. When the oil-gas mixture passes through the first bending angle, turbulence occurs, which improves the mixing effect of air and fuel and the atomization effect of fuel. The fully mixed oil-gas mixture is transported to the engine ignition area 702 for ignition, reducing the difficulty of ignition.

[0045] Specifically, Figure 1 As shown, the evaporation tube inlet is designed as a multi-hole inlet, with multiple first air inlet holes 3 and multiple second air inlet holes 4 for air intake, which can prevent fuel droplets from overflowing.

[0046] In one embodiment, Figure 1 As shown, the sum of the ventilation areas of the multiple first air inlet holes 3 is the first total area, the sum of the ventilation areas of the multiple second air inlet holes 4 is the second total area, and the sum of the first total area and the second total area is greater than the air inlet area of ​​the first tube body 1.

[0047] In this embodiment, if Figure 1 As shown, the air in the first tube body 1 enters through the multiple first air inlet holes 3 and the multiple second air inlet holes 4. When the air enters the first tube body 1 through the first air inlet holes 3 and the second air inlet holes 4, it is accelerated, thereby improving the atomization of the fuel in the first tube body 1. The total ventilation area of ​​the multiple first air inlet holes 3 and the multiple second air inlet holes 4 is greater than the cross-sectional area of ​​the first tube body 1, so that the air intake of the first tube body 1 can be guaranteed.

[0048] It should be noted that the ventilation areas of the first air inlet hole 3 and the second air inlet hole 4 are the areas projected onto a plane perpendicular to the axes of the holes.

[0049] It should be noted that the air intake area of ​​the first tube body 1 is the area of ​​a circle formed by a plane perpendicular to its axis and the inner wall of the first tube section.

[0050] The first air inlet hole 3 is formed on the sealing plate 2, and the second air inlet hole 4 is formed on the wall of the first tube body 1. The axis of the first air inlet hole 3 is perpendicular to the axis of the second air inlet hole 4. The air entering from the first air inlet hole 3 collides with the air entering from the second air inlet hole 4, thereby increasing the unstable state of the air in the first tube body 1 and improving the atomization effect of the fuel.

[0051] In one embodiment, Figure 1 As shown, the second pipe body 6 includes:

[0052] A first pipe section 601, a first end of which is connected and communicated with the second end of the first pipe body 1, and a first bending angle is provided at the connection between the first pipe section 601 and the first pipe body 1;

[0053] The second pipe segment 602 has a first end connected to and communicated with the second end of the first pipe segment 601 . The cross section of the first end of the second pipe segment 602 is circular, and the cross section of the second end of the second pipe segment 602 is oval.

[0054] In this embodiment, if Figure 1 As shown, a first bending angle is set at the connection between the second pipe section 602 and the first pipe body 1. When the air and fuel pass through the first bending angle, turbulence occurs, thereby improving the atomization effect of the fuel and the mixing effect of the air and fuel. The cross section of the first end of the second pipe section 602 is circular, which is convenient for connection with the second end of the first pipe body 1. The cross section of the second end of the second pipe section 602 is oval-shaped. Along the axial direction of the second pipe section 602, the first end of the second pipe section 602 transitions to its second end, and the circular transition becomes an oval-shaped shape, thereby increasing the speed of the gas at the second end of the second pipe section 602.

[0055] Specifically, when the first end of the second pipe segment 602 transitions to the second end, the second pipe segment 602 deflects in both the circumferential direction and the radial direction to form an oval shape.

[0056] Specifically, Figure 1 As shown, the second end of the second pipe segment 602 is configured as a bell mouth, and the bell mouth expands in a direction of the second pipe segment 602 away from the first pipe segment 601 .

[0057] Specifically, Figure 1 As shown, the second end of the second pipe section 602 is configured to be oval-shaped, and the oil-gas mixture is accelerated at the second end of the second pipe section 602 to avoid backfire and ablation of the evaporation tube.

[0058] Specifically, the oval shape and the diameter of the second pipe section 602 are designed to be gradually reduced according to the area ratio, which can accelerate the airflow output from the second end of the second pipe section 602 to avoid backfire.

[0059] Specifically, since the second pipe section 602 is deflected in both the circumferential direction and the radial direction, the airflow turbulence is fully increased, thereby improving the fuel atomization effect.

[0060] In one embodiment, Figure 1 As shown, a second bending angle is provided at the connection between the first pipe section 601 and the second pipe section 602 .

[0061] In this embodiment, if Figure 1 As shown, a second bending angle is provided at the connection between the first pipe section 601 and the second pipe section 602, so that the oil-gas mixture can be mixed again at the second bending angle before the oil-gas mixture is output from the second pipe body 6, thereby improving the mixing effect and reducing the difficulty of engine ignition.

[0062] In one embodiment, the first bending angle is 90°.

[0063] In this embodiment, the degree of the first bending angle is set to 90°, the oil-gas mixture is turned at the first bending angle, turbulence is formed here, and the first bending angle is set to 90°, and the mixing effect of air and fuel is optimal.

[0064] According to an embodiment of the present application, on the other hand, an oil-gas mixing device is also provided, such as Figures 2 to 4 As shown, including:

[0065] Evaporation tube;

[0066] The cavity 7 is provided with a gas delivery hole 701, the cavity 7 is spirally wound, an engine ignition zone 702 and a gas outlet channel 703 connected to the engine ignition zone 702 are formed between the outer walls of the cavity 7, a plurality of vents connected to the engine ignition zone 702 are provided on the cavity wall of the cavity 7, a first tube 1 is arranged in the cavity 7, a mounting hole connected to the engine ignition zone 702 is provided on the cavity wall of the cavity 7, a second end of the first tube 1 is connected to the mounting hole, a first end of the second tube 6 is connected to the mounting hole, and the second tube 6 is arranged in the engine ignition zone 702;

[0067] The fuel injection mechanism 9, the fuel injection end of the fuel injection mechanism 9 penetrates the cavity 7 and the tube wall of the first tube body 1, and is connected with the inner cavity of the first tube body 1;

[0068] An air pump is connected to the air delivery hole 701 .

[0069] In this embodiment, the injection end of the injection mechanism 9 delivers fuel to the first tube body 1, and the air pump delivers air to the cavity 7 through the air delivery hole 701. The air pressure in the cavity 7 increases, and the air in the cavity 7 enters the first tube body 1 through multiple first air inlet holes 3 and multiple second air inlet holes 4. The high-pressure air is accelerated by the first air inlet holes 3 and the second air inlet holes 4. The high-pressure air flows in the first tube body 1, atomizes the fuel in the first tube body 1, and is delivered to the engine ignition area 702 through the second tube body 6. The air in the cavity 7 is delivered to the engine ignition area 702 through multiple air holes, and ignited in the engine ignition area 702. The oil-gas mixture is ignited, and the gas in the engine ignition area 702 expands rapidly and is ejected from the air outlet channel 703 to provide power.

[0070] In one embodiment, Figures 2 to 3 As shown, the outer wall of the cavity 7 is provided with an arc surface 8, and the arc surface 8 is arranged corresponding to the second end of the second tube body 6, and the arc surface 8 is used to increase the airflow turbulence in the engine ignition area 702.

[0071] In this embodiment, the arc surface 8 can guide the oil-gas mixture output by the second tube body 6 and introduce it into the gas outlet channel 703. When the oil-gas mixture is guided by the arc surface 8, turbulence can occur, thereby improving the mixing effect of air and fuel.

[0072] Specifically, the injection angle of the second end of the second pipe segment 602 matches the tangent angle of the arc surface 8, so that the oil-gas mixture flows more smoothly in the engine burner.

[0073] Specifically, the oil-gas mixture is ejected from the bell mouth, and the oil-gas mixture interacts with the arc surface 8 in an umbrella shape, so that the oil-gas mixture flows along the arc surface 8, thereby improving the uniformity of the oil-gas mixing.

[0074] Specifically, the oil-gas mixture expands radially, and the ejected oil-gas mixture is ignited in the engine ignition zone 702. The high-temperature combustion gas formed by the combustion passes through the gas outlet channel 703 and enters the turbine component to perform work, thereby achieving normal operation of the engine.

[0075] In one embodiment, the cavity 7 is provided with a through hole corresponding to the through hole 5 , and the injection end of the injection mechanism 9 passes through the through hole and the through hole 5 in sequence and is connected with the first tube body 1 .

[0076] In this embodiment, the injection end of the injection mechanism 9 directly delivers the fuel into the first tube body 1, thereby improving the delivery efficiency.

[0077] In one embodiment, along the axial direction of the first tube body 1 , a plurality of second air inlet holes 4 are disposed between the sealing plate 2 and the through hole 5 .

[0078] In this embodiment, along the direction of air flow in the first tube body 1, the injection end of the injection mechanism 9 is located at the rear ends of the first air inlet hole 3 and the second air inlet hole 4, which can ensure that the air entering the first tube body 1 through the first air inlet hole 3 and the second air inlet hole 4 always flows toward the second end of the first tube body 1, ensuring that the fuel is transported along the first tube body 1 toward the second tube body 6, thereby preventing the fuel at the injection end of the injection mechanism 9 from splashing from the evaporator tube to the outside of the evaporator tube.

[0079] In one embodiment, Figure 3 As shown, the evaporation tubes are provided in plurality;

[0080] The fuel injection mechanism 9 comprises:

[0081] A plurality of fuel injection nozzles 901, wherein the plurality of fuel injection nozzles 901 are connected to the plurality of evaporation tubes in a one-to-one correspondence;

[0082] The fuel delivery pipe 902 is connected to the plurality of fuel injection nozzles 901 .

[0083] In this embodiment, the combustion efficiency is improved and the power output is increased.

[0084] Below is an embodiment, combined with Figures 1 to 4 A comprehensive description of all the above schemes is given.

[0085] The air pump delivers high-pressure air to the cavity 7 to increase the pressure in the cavity 7. The air enters the first tube body 1 through the multiple first air inlet holes 3 and the multiple second air inlet holes 4. The fuel supply mechanism supplies fuel to the multiple fuel injectors 901 through the fuel delivery pipe 902. The fuel injectors 901 pass through the through holes and the perforations 5 to deliver the fuel to the first tube body 1. The air is accelerated when it enters the first tube body 1 through the multiple first air inlet holes 3 and the multiple second air inlet holes 4. The air blows the fuel away and atomizes the fuel. A first bending angle is provided at the connection between the first tube body 1 and the second tube body 6. Turbulence occurs when the oil-gas mixture passes through the first bending angle, thereby improving the mixing effect of air and fuel and improving the atomization effect of the fuel.

[0086] The air in the first tube body 1 enters through the multiple first air inlet holes 3 and the multiple second air inlet holes 4. The air is accelerated when entering the first tube body 1 through the first air inlet holes 3 and the second air inlet holes 4, thereby improving the atomization of the fuel in the first tube body 1. The sum of the ventilation areas of the multiple first air inlet holes 3 and the multiple second air inlet holes 4 is greater than the air inlet area of ​​the first tube body 1, thereby ensuring the air intake of the first tube body 1. The first air inlet holes 3 are provided on the sealing plate 2, and the second air inlet holes 4 are provided on the tube wall of the first tube body 1. The axis of the first air inlet holes 3 is perpendicular to the axial direction of the second air inlet holes 4. The gas entering from the first air inlet holes 3 collides with the gas entering from the second air inlet holes 4, thereby improving the unstable state of the air in the first tube body 1 and improving the atomization effect of the fuel.

[0087] The second end of the second pipe section 602 is set to an oval shape, and the oil-gas mixture is accelerated at the second end of the second pipe section 602 to avoid backfire and ablation of the evaporation tube. The oval shape and the diameter of the second pipe section 602 are gradually reduced according to the area ratio, which can accelerate the airflow output from the second end of the second pipe section 602 to avoid backfire. Since the second pipe section 602 is deflected in both the circumferential and radial directions, the airflow turbulence is fully increased, and the fuel atomization effect is improved.

[0088] The arc surface 8 can guide the gas output from the second tube body 6 and introduce it into the gas outlet channel 703. When the oil-gas mixture is guided by the arc surface 8, turbulence can occur, thereby improving the mixing effect of air and fuel. The injection angle of the second end of the second tube section 602 matches the tangent angle of the arc surface 8, so that the oil-gas mixture flows more smoothly in the engine burner.

[0089] The oil-gas mixture is ejected from the bell mouth, and the oil-gas mixture interacts with the arc surface 8 in an umbrella shape, so that the oil-gas mixture flows along the arc surface 8, and the uniformity of the oil-gas mixture is improved. The oil-gas mixture expands radially along the outlet of the second pipe section 602, and the ejected oil-gas mixture is ignited in the engine ignition area 702. The high-temperature combustion gas formed by the combustion passes through the outlet channel 703 and enters the turbine component to perform work, thereby realizing the normal operation of the engine.

[0090] Along the direction of air flow in the first tube body 1, the injection end of the injection mechanism 9 is located at the rear ends of the first air inlet hole 3 and the second air inlet hole 4, which can ensure that the air entering the first tube body 1 through the first air inlet hole 3 and the second air inlet hole 4 always flows toward the second end of the first tube body 1, ensuring that the fuel is transported along the first tube body 1 toward the second tube body 6, thereby preventing the fuel at the injection end of the injection mechanism 9 from splashing from the evaporator tube to the outside of the evaporator tube.

[0091] The first tube body 1 is designed to be attached to the inner wall of the cavity 7. The temperature in the engine ignition zone 702 is relatively high. The air transported in the first tube body 1 can reduce the temperature of the cavity wall of the cavity 7. At the same time, the engine ignition zone 702 can heat the oil-gas mixture in the first tube body 1 to improve the mixing effect.

[0092] The inlet of the first tube body 1 adopts a multi-hole inlet design. A plurality of first air inlet holes 3 and a plurality of second air inlet holes 4 are arranged on the first tube body 1. The equivalent air inlet area of ​​the plurality of first air inlet holes 3 and the plurality of second air inlet holes 4 is larger than the air inlet area of ​​the first tube body 1, so that the air can be accelerated in the process of entering the first tube body 1, the disturbance of the airflow in the evaporation tube is enhanced, and the risk of the oil-gas mixture in the evaporation tube overflowing into the cavity 7 is reduced.

[0093] The evaporation tube has a three-fold deflection structure design. The first deflection is that the first tube body 1 and the first tube section 601 are bent 90 degrees at a position which is four-fifths of the length from the sealing plate 2 of the first tube body 1.

[0094] The second deflection is a bending at the connection between the first tube section 601 and the second tube section 602 .

[0095] The third deflection is that the circular cross section of the second pipe section 602 gradually evolves into a waist-shaped hole cross section, achieving three deflections of the evaporation tube spray angle (including circumferential deflection and radial deflection).

[0096] The turbulence of the oil-gas mixture in the evaporator tube is increased, the disturbance of the airflow in the evaporator tube is strengthened, the difficulty of engine ignition is reduced, and the starting state of the engine is improved. On the other hand, the jet direction of the oil-gas mixture entering the engine ignition zone 702 is adjusted to achieve the annular flow of the oil-gas mixture along the arc plate, thereby improving the oil-gas mixing effect in the engine ignition zone 702.

[0097] The equivalent area of ​​the outlet of the second pipe section 602 is reduced in proportion to the main pipe diameter of the evaporation tube, so that the outlet jet velocity of the second pipe section 602 can be increased to avoid flashback and evaporation tube ablation.

[0098] The cross section of the outlet of the second pipe section 602 is oval, and the outlet of the second pipe section 602 is configured as a bell mouth. On the one hand, the outlet airflow of the second pipe section 602 interacts with the annular plate in an umbrella shape to improve the uniformity of oil-gas mixing. On the other hand, the outlet airflow of the second pipe section 602 expands radially, and impacts the airflow guided by the arc plate, which is beneficial to engine ignition and reduces the possibility of flameout in slow or cruising state.

[0099] Although the embodiments of the present application are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations are all within the scope defined by the attached present application.

Claims

1. An evaporation tube, characterized in that: include: A first tube body (1), a first end of which is provided with a sealing plate (2), a plurality of first air inlet holes (3) are provided on the sealing plate (2), a plurality of second air inlet holes (4) are provided on the side wall of the first tube body (1), the plurality of first air inlet holes (3) and the plurality of second air inlet holes (4) are used to input high-pressure gas, and a through hole (5) is provided on the side wall of the first tube body (1) for inputting fuel; A second tube body (6), a first end of which is connected to and communicates with the second end of the first tube body (1); a first bending angle is provided at the connection between the first tube body (1) and the second tube body (6); and the second end of the second tube body (6) is used to communicate with the engine ignition zone (702).

2. The evaporation tube according to claim 1, characterized in that: The sum of the ventilation areas of the plurality of first air inlet holes (3) is a first total area, the sum of the ventilation areas of the plurality of second air inlet holes (4) is a second total area, and the sum of the first total area and the second total area is greater than the air inlet area of ​​the first tube body (1).

3. The evaporation tube according to claim 1, characterized in that: The second tube (6) comprises: A first pipe section (601), a first end of which is connected to and communicates with the second end of the first pipe body (1), and the first bending angle is provided at the connection between the first pipe section (601) and the first pipe body (1); The second pipe segment (602) has a first end connected to and communicated with the second end of the first pipe segment (601), the cross-section of the first end of the second pipe segment (602) is circular, and the cross-section of the second end of the second pipe segment (602) is oval.

4. The evaporation tube according to claim 3, characterized in that: A second bending angle is provided at the connection between the first pipe section (601) and the second pipe section (602).

5. The evaporation tube according to any one of claims 1 to 4, characterized in that: The first bending angle is 90°.

6. An oil-gas mixing device, characterized in that: include: The evaporation tube according to any one of claims 1 to 5; A cavity (7) is provided with an air delivery hole (701); the cavity (7) is spirally wound; the engine ignition zone (702) and an air outlet channel (703) connected to the engine ignition zone (702) are formed between the outer walls of the cavity (7); a plurality of air vents connected to the engine ignition zone (702) are provided on the cavity wall of the cavity (7); the first tube (1) is arranged in the cavity (7); a mounting hole connected to the engine ignition zone (702) is provided on the cavity wall of the cavity (7); the second end of the first tube (1) is connected to the mounting hole; the first end of the second tube (6) is connected to the mounting hole; the second tube (6) is arranged in the engine ignition zone (702); An oil injection mechanism (9), wherein an oil injection end of the oil injection mechanism (9) penetrates the cavity (7) and the tube wall of the first tube body (1), and is communicated with the inner cavity of the first tube body (1); An air pump is connected to the air delivery hole (701).

7. The oil-gas mixing device according to claim 6, characterized in that: The outer wall of the cavity (7) is provided with a curved surface (8), the curved surface (8) is arranged corresponding to the second end of the second tube (6), and the curved surface (8) is used to increase the turbulence of the airflow in the engine ignition zone (702).

8. The oil-gas mixing device according to claim 6, characterized in that: The cavity (7) is provided with a through hole corresponding to the through hole (5), and the oil injection end of the oil injection mechanism (9) passes through the through hole and the through hole (5) in sequence and is connected with the first tube body (1).

9. The oil-gas mixing device according to claim 8, characterized in that: Along the axial direction of the first tube body (1), a plurality of the second air inlet holes (4) are arranged between the sealing plate (2) and the through hole (5).

10. The oil-gas mixing device according to claim 8, characterized in that: The evaporation tube is provided in plurality; The oil injection mechanism (9) comprises: A plurality of fuel injection nozzles (901), wherein the plurality of fuel injection nozzles (901) are connected to the plurality of evaporation tubes in a one-to-one correspondence; A fuel delivery pipe (902), wherein the fuel delivery pipe (902) is connected to the plurality of fuel injection nozzles (901).

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