Rotary impact atomizing nozzle device and atomizing method thereof

Abstract

The application discloses a rotating collision atomizing nozzle device and an atomizing method thereof, which comprises a motor, a sealing structure arranged on the motor, wherein the sealing structure comprises a main shaft, the main shaft rotates along the axial direction of the motor to push fuel to move along the axial direction of the motor, and a nozzle arranged on the main shaft, the nozzle rotates along the main shaft to push the fuel to move along the circumferential direction of the nozzle. The application is based on the integration and miniaturization design of the motor, the sealing structure and the nozzle, can improve the atomizing effect of the engine fuel nozzle under the full working condition, can improve the atomizing performance of the nozzle, can improve the combustion performance of the combustion chamber, can reduce the coking and carbon deposition of the nozzle, can reduce the emission, and can further improve the service life of the engine.

Description

Technical Field

[0001] This invention relates to the field of fuel atomization technology for fuel engines, and more particularly to a rotating impact atomizing nozzle device and its atomization method. Background Technology

[0002] Fuel atomizing nozzles are a core subsystem of aero-engines and liquid rocket engines. As aero-engines and liquid rocket engines develop towards higher performance and lower emissions, there is a need to develop fuel atomizing nozzles that provide optimal atomization under various engine operating conditions. Commonly used nozzles include centrifugal nozzles and impact atomizing nozzles. Centrifugal nozzles, due to the low fuel supply pressure at the start of an aero-engine, result in poor atomization, leading to nozzle coking and carbon buildup. This affects engine start-up, emissions, and exhaust temperature distribution, ultimately impacting engine performance and lifespan. Impact atomizing nozzles are mainly used in liquid rocket engine injectors. They work by colliding the jets from the nozzles, breaking them into liquid films, filaments, and droplets. When the initial pressure is low, the momentum of the jet column is small, resulting in poor atomization after the collision. Poor atomization leads to nozzle coking and carbon buildup, which in turn affects combustion efficiency in the combustion chamber, ultimately impacting engine performance and lifespan. Summary of the Invention

[0003] The purpose of this invention is to provide a rotating collision atomizing nozzle device and its atomization method, which solves the problem of poor atomization effect of fuel atomizing nozzles in the prior art, which leads to nozzle coking and carbon deposits, thereby affecting the combustion efficiency of the combustion chamber, as well as the performance and life of the engine.

[0004] The technical solution adopted in this invention is as follows:

[0005] A rotating impact atomizing nozzle device, comprising:

[0006] Electric motor;

[0007] A sealing structure is provided on the motor, the sealing structure including a main shaft that rotates along the axial direction of the motor;

[0008] A nozzle is disposed on the main shaft, and the nozzle rotates along the main shaft.

[0009] Preferably, the connection between the motor and the spindle is a spline connection.

[0010] Preferably, the main shaft is disposed through the axial position of the sealing structure, one end of the main shaft is connected to the motor via a spline, and the nozzle is sleeved on the outer periphery of the other end of the main shaft.

[0011] Preferably, the sealing structure has a chamber inside, the spindle has a spindle cavity inside, and the outer periphery of the end of the spindle near the chamber has a plurality of through holes communicating with the spindle cavity.

[0012] One end of the chamber extends outside the sealing structure and is connected to a nozzle.

[0013] Preferably, the nozzle includes a connecting part and a nozzle chamber, one end of the connecting part is sleeved on the outer periphery of the main shaft, and the other end of the connecting part is connected to and communicates with the nozzle chamber;

[0014] A flow equalizer is provided in the nozzle chamber, and several nozzles are provided on the outer wall of the nozzle chamber.

[0015] Preferably, bearings are provided at both ends of the sealing structure, the main shaft is rotatably connected to the bearings, and a bearing cap connected by a fastener is provided on the outside of the bearing.

[0016] Preferably, the outer surface of the bearing is provided with a plurality of sealing rings.

[0017] Preferably, the motor has a motor shaft connected by a bushing, the connection between the motor shaft and the main shaft is made by a spline, the outer surface of the motor shaft is wound with a motor coil, and the terminals of the motor coil extend to the outside of the motor.

[0018] The present invention also provides an atomization method for a rotating collision atomizing nozzle device, comprising the following steps:

[0019] One end of the motor is connected to a sealing structure, and the end of the sealing structure away from the motor is connected to a nozzle.

[0020] The motor is started, which drives the main shaft of the sealing structure to rotate, and the main shaft drives the nozzle to rotate;

[0021] Fuel enters the sealed chamber through the connector, and then enters the spindle cavity through the chamber. The rotation of the spindle causes the fuel to move within the spindle cavity and enter the nozzle.

[0022] The fuel is atomized after passing through the flow equalizer inside the nozzle and being sprayed out of the nozzle.

[0023] Preferably, the motor has a rotational speed of 1000-5000 rpm, the bore diameter of the main shaft cavity is 2-5 mm, the nozzle bore diameter is 0.2-0.5 mm, and the atomized fuel mist has a particle size of 40-80 μm.

[0024] The beneficial effects of the present invention include at least the following: the rotary collision atomizing nozzle device provided by the present invention is based on the integrated and miniaturized design of the motor, sealing structure and nozzle, which can improve the atomization effect of the engine fuel nozzle under all operating conditions, improve the atomization performance of the nozzle, improve the combustion performance of the combustion chamber, reduce nozzle coking and carbon deposits, reduce emissions, and thus improve the engine life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the rotating collision atomizing nozzle device according to an embodiment of the present invention;

[0026] Figure 2 This is a cross-sectional structural diagram of the rotating collision atomizing nozzle device according to an embodiment of the present invention;

[0027] Figure 3 This is another cross-sectional structural diagram of the rotating collision atomizing nozzle device according to an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures

[0029] 1-Motor, 11-Shaft sleeve, 12-Motor shaft, 13-Motor coil, 131-Motor coil, 2-Sealing structure, 21-Main shaft, 211-Main shaft inner cavity, 212-Through hole, 22-Cavity, 23-Bearing, 24-Bearing cap, 3-Nozzle, 31-Connecting part, 32-Nozzle chamber, 321-Nozzle, 33-Flow equalizer, 4-Spline, 5-Connecting nozzle, 6-Sealing ring. Detailed Implementation

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] See Figures 1-3 This invention provides a rotating collision atomizing nozzle device, comprising: a motor 1; a sealing structure 2 disposed on the motor 1, the sealing structure 2 including a main shaft 21, the main shaft 21 rotating along the axial direction of the motor 1; and a nozzle 3 disposed on the main shaft 21, the nozzle 3 rotating along the main shaft 21.

[0034] It should be noted that nozzle 3 can be a centrifugal nozzle, a direct-fire nozzle, or a pneumatic atomizing nozzle; no specific limitation is made here.

[0035] The above technical solution is based on the integrated and miniaturized design of motor 1, sealing structure 2 and nozzle 3. Motor 1 drives the rotation of sealing structure 2, which in turn drives the rotation of nozzle 3. This causes the liquid column ejected from nozzle 3 to be subjected to strong centrifugal force during the collision, further breaking and atomizing the fuel. This improves the atomization effect of engine fuel nozzle 3 under all operating conditions, improves the atomization performance of nozzle 3, enhances the combustion performance of combustion chamber, reduces nozzle coking and carbon deposits, reduces emissions, and thus improves engine life.

[0036] In one embodiment, the motor 1 and the main shaft 21 are connected by a spline 4. The spline 4 connection allows for the transmission of large torques, enabling it to withstand significant torque, and also facilitates easy assembly and disassembly, simplifying future maintenance and repair.

[0037] In one embodiment, the main shaft 21 is disposed through the axial position of the sealing structure 2, one end of the main shaft 21 is connected to the motor 1 via a spline 4, and the nozzle 3 is sleeved on the outer periphery of the other end of the main shaft 21.

[0038] It should be noted that the spindle 21 and the nozzle 3 can be threaded together; no specific limitation is made here.

[0039] In one embodiment, the sealing structure 2 has a chamber 22 inside, and the spindle 21 has a spindle cavity 211 inside. The outer periphery of the end of the spindle 21 near the chamber 22 has several through holes 212 communicating with the spindle cavity 211. One end of the chamber 22 extends outside the sealing structure 2 and is connected to a connector 5. Fuel is injected into the chamber 22 through the connector 5, and the fuel in the chamber 22 enters the spindle cavity 211 through the communicating through holes 212. As the spindle 21 rotates, the fuel is injected into the nozzle 3.

[0040] In one embodiment, the nozzle 3 includes a connecting portion 31 and a nozzle chamber 32. One end of the connecting portion 31 is fitted around the outer periphery of the main shaft 21, and the other end of the connecting portion 31 is connected to and communicates with the nozzle chamber 32. A flow equalizer 33 is provided inside the nozzle chamber 32, and a plurality of nozzle orifices 321 are provided on the outer wall of the nozzle chamber 32. When the nozzle 3 rotates, the fuel at the nozzle 3 enters the flow equalizer 33 and is then injected from the nozzle orifices 321. Simultaneously, the fuel is subjected to a strong centrifugal force, further atomizing and breaking down the fuel, thereby improving the atomization effect of the engine fuel nozzle 3 under all operating conditions, enhancing the combustion performance of the combustion chamber, reducing nozzle coking and carbon deposits, lowering emissions, and ultimately extending engine life.

[0041] In one embodiment, bearings 23 are provided at both ends of the sealing structure 2, the main shaft 21 is rotatably connected to the bearings 23, and a bearing cap 24 connected by a fastener is provided on the outside of the bearings 23.

[0042] In one embodiment, the outer surface of the bearing 23 is provided with a plurality of sealing rings 6.

[0043] It should be noted that the sealing ring 6 is preferably a rubber sealing ring. The sealing ring 6 can effectively prevent fuel from entering other parts through the outer wall of the main shaft 21 when the main shaft 21 rotates.

[0044] In one embodiment, the motor 1 has a motor shaft 12 connected by a bushing 11. The motor shaft 12 is connected to the main shaft 21 by a spline 4. A motor coil 13 is wound around the outer surface of the motor shaft 12, and the terminal 131 of the motor coil 13 extends outside the motor 1. The terminal 131 is connected to an external power source. When the motor coil 13 is energized, it generates a magnetic field that causes the motor shaft 12 to rotate.

[0045] This invention provides an atomization method using a rotating collision atomizing nozzle device, comprising the following steps:

[0046] Step S101: Connect one end of the motor 1 to the sealing structure 2, and connect the end of the sealing structure 2 away from the motor 1 to the nozzle 3;

[0047] Step S102: Start the motor 1, the motor 1 drives the main shaft 21 of the sealing structure 2 to rotate, and the main shaft 21 drives the nozzle 3 to rotate;

[0048] Step S103: Fuel enters the chamber 22 of the sealing structure 2 through the connector 5. The fuel enters the spindle inner cavity 211 through the chamber 22. The rotation of the spindle 21 drives the fuel to move in the spindle inner cavity 211 and enter the nozzle 3.

[0049] Step S104: After passing through the flow equalizer 33 in the nozzle 3, the fuel is sprayed out from the nozzle 321 and atomized.

[0050] In one embodiment, the motor 1 rotates at a speed of 1000-5000 rpm, the bore diameter of the main shaft cavity 211 is 2-5 mm, the bore diameter of the nozzle 321 is 0.2-0.5 mm, and the particle size of the atomized fuel mist is 40-80 μm.

[0051] It should be noted that the rotational speed of motor 1, the orifice diameter of the main shaft cavity 211, and the orifice diameter of nozzle 321 are all factors that contribute to the atomization effect. Furthermore, the final atomized fuel mist obtained through experiments has a particle size of 40-80μm, resulting in good atomization, reduced coking and carbon buildup in nozzle 3, and lower emissions.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rotating collision atomizing nozzle device, characterized in that, include: Motor (1); A sealing structure (2) is provided on the motor (1). The sealing structure (2) includes a main shaft (21) that extends through the motor along the axial direction and rotates along the axial direction of the motor (1). Bearings (23) are provided at both ends of the sealing structure (2), and the main shaft (21) is rotatably connected to the bearings (23). A cavity (22) is provided inside the sealing structure (2), and a main shaft cavity (211) is provided inside the main shaft (21). Several through holes (212) communicating with the main shaft cavity (211) are provided on the outer periphery of the end of the main shaft (21) near the cavity (22). The through holes (212) are connected to the cavity. The chamber (22) is connected; one end of the chamber (22) extends to the outside of the sealing structure (2) and is connected to a nozzle (5); the nozzle (3) is disposed on the main shaft (21), the nozzle (3) rotates along the main shaft (21), the nozzle (3) includes a connecting part (31) and a nozzle chamber (32), one end of the connecting part (31) is sleeved on the outer periphery of the main shaft (21), the other end of the connecting part (31) is connected to the nozzle chamber (32) and communicates with the nozzle chamber (32); a flow equalizer (33) is disposed in the nozzle chamber (32), and a plurality of nozzles (321) are disposed on the outer wall of the nozzle chamber (32).

2. The rotary collision atomizing nozzle device according to claim 1, characterized in that, The motor (1) and the main shaft (21) are connected by a spline (4).

3. The rotating collision atomizing nozzle device according to claim 1, characterized in that, One end of the main shaft (21) is connected to the motor (1) via a spline (4), and the nozzle (3) is fitted around the other end of the main shaft (21).

4. The rotating collision atomizing nozzle device according to claim 1, characterized in that, The bearing (23) is provided with a bearing cap (24) connected by a fastener on its outer side.

5. The rotating collision atomizing nozzle device according to claim 4, characterized in that, The outer surface of the bearing (23) is provided with several sealing rings (6).

6. The rotary collision atomizing nozzle device according to claim 1, characterized in that, The motor (1) is provided with a motor shaft (12) connected by a bushing (11). The connection between the motor shaft (12) and the main shaft (21) is connected by a spline (4). The outer surface of the motor shaft (12) is wound with a motor coil (13). The terminal (131) of the motor coil (13) extends to the outside of the motor (1).

7. The atomization method of the rotary collision atomizing nozzle device according to any one of claims 1-6, characterized in that, Includes the following steps: One end of the motor (1) is connected to the sealing structure (2), and the end of the sealing structure (2) away from the motor (1) is connected to the nozzle (3). Start the motor (1), the motor (1) drives the main shaft (21) of the sealing structure (2) to rotate, and the main shaft (21) drives the nozzle (3) to rotate; Fuel is introduced into the chamber (22) of the sealing structure (2) through the connector (5), and the fuel enters the inner cavity (211) of the main shaft through the chamber (22). The rotation of the main shaft (21) drives the fuel to move in the inner cavity (211) of the main shaft and enter the nozzle (3). The fuel is atomized after passing through the flow equalizer (33) in the nozzle (3) and being sprayed out from the nozzle (321).

8. The atomization method according to claim 7, characterized in that, The motor (1) has a rotational speed of 1000-5000 rpm, the bore diameter of the main shaft cavity (211) is 2-5 mm, the bore diameter of the nozzle (321) is 0.2-0.5 mm, and the particle size of the atomized fuel mist is 40-80 μm.

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