Evaporating pipe device based on ultrasonic waves

Abstract

The utility model provides an evaporating pipe device based on ultrasonic waves. The evaporating pipe device comprises an oil rod, an ultrasonic generator, an evaporating pipe and a swirler. An ultrasonic generator is arranged in the oil rod, the evaporation pipe comprises a primary air inlet pipe and a secondary air inlet pipe, the primary air inlet pipe comprises an evaporation pipe inlet section, an evaporation pipe middle section and an evaporation pipe outlet section which are communicated in sequence, and fuel oil flows through the ultrasonic generator to be atomized and then enters the evaporation pipe with an air mixture of the primary air inlet pipe from the evaporation pipe inlet section. And an air mixture of the secondary air inlet pipe passes through the swirler and then is mixed with an oil-gas mixture in the outlet section of the evaporation pipe, and the mixture enters the head of the flame tube after being subjected to rotational flow through the internal rotation thread. The fuel oil atomization device is favorable for realizing a good atomization effect of fuel oil within a short time and a short size, is simple in structure, realizes three-time atomization of the fuel oil through the ultrasonic generator and the two air inlet pipes, and can fully consider higher combustion efficiency and widen the stable working boundary of a combustion chamber.

Description

Technical Field

[0001] The utility model relates to the field of aviation engine combustion chambers, in particular to an ultrasonic-based evaporation tube device, which can effectively improve the mixing effect of fuel and air and enhance flame stability. Background Art

[0002] With the development of engine technology, higher requirements are being placed on combustion chamber performance, such as high combustion efficiency, compact size, and low smoke emissions. Evaporator nozzles can better meet these requirements. The development of evaporator nozzles aims to utilize the heat from the burned fuel to accelerate the evaporation and mixing process, thereby shortening the length of the combustion chamber occupied by the mixture.

[0003] Due to the structural characteristics of micro-engines, micro-combustion chambers often utilize evaporator tubes to organize fuel atomization and evaporation. The flow characteristics of the gas within the evaporator tube significantly influence the fuel's evaporation and atomization properties. The basic principle of the evaporator tube is that fuel is sprayed into the evaporator tube, which is filled with high-temperature airflow. Atomized by the aerodynamic force, it rapidly absorbs heat and evaporates into vapor. This vapor mixes with the air within the tube to form a fuel-air mixture, which is then ejected from the evaporator tube and burned in the flame tube.

[0004] Existing evaporator tube fuel supply designs primarily utilize direct injection. Due to the low fuel supply pressure, the majority of the tube wall still utilizes a smooth, straight tube structure. This results in a short residence time for the fuel in these evaporator tubes, a reduced contact area with the airflow, and incomplete evaporation of the fuel within the tube, resulting in poor atomization and evaporation. The direct injection outlet of the oil-air mixture evaporator tube hinders sufficient diffusion of the mixture into the combustion chamber over a short distance, reducing combustion efficiency. To optimize the atomization and evaporation of the evaporator tube, the fuel supply method and internal structure play a key role. The quality of the evaporator tube design significantly impacts the performance of the microcombustion chamber, and this area holds great research potential. Utility Model Content

[0005] The technical problem solved by the present invention is as follows: In order to overcome the shortcomings of the above-mentioned existing evaporator tube combustion technology, the present invention provides an evaporator tube device based on ultrasound, in which an ultrasonic generator is arranged in the oil rod, which helps to achieve a good atomization effect of the fuel in a short time and with a short size. The air mixture is accelerated in the tapered section of the secondary intake pipe and then passes through the swirler, which helps to secondary heat and evaporate the fuel gas; and the internal thread of the evaporator tube helps to diffuse the fuel gas in the combustion chamber.

[0006] The technical solution adopted by the utility model to solve its technical problems is: an ultrasonic-based evaporator tube device, including an oil rod, an ultrasonic generator, an evaporator tube, and a cyclone. The ultrasonic generator is built into the oil rod outlet. The evaporator tube includes a primary air inlet pipe and a secondary air inlet pipe. The primary air inlet pipe includes an evaporator tube inlet section, an evaporator tube middle section, and an evaporator tube outlet section that are connected in sequence. The cyclone is built into the evaporator tube outlet section and connected to the secondary air inlet pipe. The evaporator tube outlet section is provided with an internal thread.

[0007] A portion of the air mixture enters the evaporation tube through the primary air intake pipe, and the other portion enters the evaporation tube through the secondary air intake pipe.

[0008] After the fuel flow is atomized by the ultrasonic generator, it mixes with the primary intake pipe air mixture and enters the evaporator from the inlet section of the evaporator, passes through the middle section of the evaporator to the outlet section of the evaporator, and the secondary intake pipe air mixture is mixed with the oil and gas mixture in the outlet section of the evaporator after passing through the swirler. The mixture swirls through the internal thread and enters the flame tube head.

[0009] Preferably, a cyclone is disposed in each of the two evaporator tube outlet sections, and the cyclone directions of the two built-in cyclones are the same or opposite.

[0010] The four sections of the evaporation tube can be formed as one piece or welded in sections.

[0011] The cyclone blades are straight blades or curved blades, and the number of blades is 6 to 18.

[0012] The secondary air intake pipe branch has a tapered structure.

[0013] The beneficial effects of the utility model are:

[0014] (1) The utility model sets an ultrasonic generator in the oil rod. Compared with the traditional evaporation tube, the fuel is atomized into small droplets when passing through the ultrasonic generator, which achieves a good atomization effect of the fuel and helps to reduce the design size of the evaporation tube.

[0015] (2) The air mixture of the utility model is accelerated in the tapered section of the secondary intake pipe and then accelerated by the cyclone and mixed with the gas mixture, which helps to secondary heat and evaporate the gas and improve the atomization effect.

[0016] (3) The internal thread of the evaporation tube of the utility model helps the gas to diffuse in the combustion chamber.

[0017] (4) The utility model proposes an ultrasonic-based evaporation tube device with a simple structure. It realizes three-stage atomization of fuel through an ultrasonic generator and two air inlet pipes, which can fully take into account high combustion efficiency and widen the stable working boundary of the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of an ultrasonic-based evaporation tube device of the present invention;

[0019] Figure 2 This is a schematic structural diagram of an ultrasonic-based evaporation tube device of the present invention;

[0020] Figure 3 This is a rear view of an ultrasonic-based evaporation tube device of the present invention;

[0021] In the figure: 1- oil rod 2- ultrasonic generator 3- evaporation tube 4- cyclone 5- primary air inlet pipe 6- secondary air inlet pipe 7- evaporation tube inlet section 8- evaporation tube middle section 9- evaporation tube outlet section 10- internal thread. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Combined with reference Figure 1-3 The utility model device consists of an oil rod 1, an ultrasonic generator 2, an evaporation tube 3, and a cyclone 4. The ultrasonic generator 2 is built into the oil rod outlet. The evaporation tube 3 includes a primary air intake pipe 5 and a secondary air intake pipe 6. The primary air intake pipe 5 includes an evaporation tube inlet section 7, an evaporation tube middle section 8 and an evaporation tube outlet section 9 that are connected in sequence. The cyclone 4 is built into the evaporation tube outlet section 9 and is connected to the secondary air intake pipe 6. The evaporation tube outlet section 9 is provided with an internal thread 10.

[0024] Part of the air mixture enters the evaporator 3 through the primary intake pipe 5, while the remaining part enters the evaporator 3 through the secondary intake pipe 6. The fuel flows through the ultrasonic generator 2, where it is atomized and mixed with the air mixture in the primary intake pipe 5. The fuel then enters the evaporator 3 through the evaporator inlet section 7. During the oil-air mixing process, the oil droplets are further atomized by the shear force of the air, reducing their diameter. The droplets absorb heat from the air mixture and evaporate into a gaseous state, forming an oil-air mixture. The oil-air mixture absorbs further heat in the evaporator's middle section 8, causing the oil droplets to evaporate into a gaseous state before being diverted to the evaporator's outlet section 9. The secondary intake pipe 6 is tapered. The air mixture is accelerated through the secondary intake pipe 6 and passes through the cyclone 4. It then mixes with the oil-air mixture in the evaporator outlet section 9, shearing and atomizing the oil droplets in the oil-air mixture. As the mixture passes through internal threads 10, the swirling air accelerates the fuel's atomization, causing it to vaporize and mix intensely with the swirling air. Furthermore, the oil-air mixture absorbs further heat, causing the remaining oil droplets to evaporate. The oil-air mixture then exits evaporator tube 3 and burns within the flame tube. A swirler 4 is located in each of the two evaporator tube outlet sections 9, with the two internal swirlers swirl in either the same or opposite directions.

[0025] Matters not covered in this utility model are known technologies.

[0026] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An ultrasonic evaporation tube device, characterized in that: The device comprises: An oil rod, an ultrasonic generator, an evaporation tube, and a cyclone. The ultrasonic generator is built into the outlet of the oil rod. The evaporation tube includes a primary air inlet pipe and a secondary air inlet pipe. The primary air inlet pipe includes an evaporation tube inlet section, an evaporation tube middle section, and an evaporation tube outlet section that are connected in sequence. The cyclone is built into the evaporation tube outlet section and connected to the secondary air inlet pipe. The evaporation tube outlet section is provided with an internal thread. A portion of the air mixture enters the evaporation tube through the primary air intake pipe, and the other portion enters the evaporation tube through the secondary air intake pipe. After the fuel flow is atomized by the ultrasonic generator, it mixes with the primary intake pipe air mixture and enters the evaporator from the inlet section of the evaporator, passes through the middle section of the evaporator to the outlet section of the evaporator, and the secondary intake pipe air mixture is mixed with the oil and gas mixture in the outlet section of the evaporator after passing through the swirler. The mixture swirls through the internal thread and enters the flame tube head.

2. The ultrasonic evaporation tube device according to claim 1, characterized in that: A cyclone is placed in each of the two evaporator tube outlet sections, and the cyclone directions of the two built-in cyclones are the same or opposite.

3. The ultrasonic evaporation tube device according to claim 1, characterized in that: The four sections of the evaporation tube can be formed as one piece or welded in sections.

4. The ultrasonic evaporation tube device according to claim 1, characterized in that: The cyclone blades are straight blades or curved blades, and the number of blades is 6 to 18.

5. The ultrasonic evaporation tube device according to claim 1, characterized in that: The secondary air intake pipe branch has a tapered structure.

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