CN214917195U

CN214917195U - Atomizing nozzle combining pulse excitation and bubble atomization

Info

Publication number: CN214917195U
Application number: CN202120792711.2U
Authority: CN
Inventors: 黄小彬; 刘洪�; 张斌; 谢名云
Original assignee: Sichuan Research Institute Of Shanghai Jiaotong University
Current assignee: Sichuan Research Institute Of Shanghai Jiaotong University
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-11-30
Anticipated expiration: 2031-04-19

Abstract

The utility model provides an atomizing nozzle that pulse excitation and bubble atomization combine belongs to gas-liquid two-phase flow atomization technical field, this atomizing nozzle that pulse excitation and bubble atomization combine includes the cavity, the rear inner wall of cavity has seted up first circular recess, the first circular recess in-connection has the intake pipe, the front end of cavity has seted up the nozzle, the rear inner wall of nozzle has seted up the spray tube shrink section, and the spray tube shrink section is linked together with the cavity of cavity, the circumference surface of cavity has seted up the second circular recess, and the second circular recess is linked together with the cavity of cavity, fixedly connected with pulse inlet in the second circular recess, the lower extreme of pulse inlet is connected with the hose; the device ingeniously combines the characteristics of pulse atomization and bubble atomization technologies, the independent controllability of the atomization effect is realized, the bubble particle size is smaller and is more uniform in distribution, the average particle size of atomized liquid drops is smaller, the mixing effect with the surrounding environment is better, and the good working performance can be realized under the nonstandard working condition.

Description

Atomizing nozzle combining pulse excitation and bubble atomization

Technical Field

The utility model belongs to the technical field of gas-liquid two-phase flow atomizing, concretely relates to atomizing nozzle that pulse excitation and bubble atomizing combine.

Background

An atomizing nozzle is a device capable of converting a large amount of bulk liquid into spray or rapidly dispersing the liquid into small droplets in space, and is widely applied to various industrial technologies such as internal combustion engines, gas turbines, rocket engines, agriculture, spraying, food processing and the like. Nozzle types can be divided into pressure-type atomizing nozzles and air-assisted atomizing nozzles based on the presence or absence of gas in the nozzle: the pressure atomizing nozzles comprise direct injection nozzles, pressure swirl atomizing nozzles, backflow nozzles and the like, but the nozzles have higher injection pressure and poor atomizing effect when the flow is small, namely the pressure difference is small; the air-assisted atomizing nozzle mainly comprises a pneumatic atomizing nozzle and a bubble atomizing nozzle, the pneumatic atomizing nozzle is mainly used for enhancing the atomizing effect based on the mutual shearing action of gas momentum and liquid momentum, but the quantity of gas needed by the method is large, the bubble atomizing nozzle is mainly used for generating bubbles in liquid based on a small quantity of gas to form bubble two-phase flow, and after the bubble two-phase flow is sprayed out from the nozzle, the bubbles are rapidly expanded and broken, so that the massive liquid is quickly broken into liquid drops, the primary atomizing process is accelerated, and the atomizing effect is remarkably improved. Besides the two common atomizing nozzle modes, the atomizing effect can be improved by an active control method, such as a pulse atomizing nozzle, and the nozzles of the type can excite jet flow pulses to enable the jet flow to have certain inherent frequency, so that the atomizing controllability and the atomizing effect enhancement are realized.

The existing bubble atomizing nozzle has the defects of unstable working state caused by uneven bubbling of the quantity of bubbles and poor atomizing effect caused by overlarge bubbles under the non-optimal working condition.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an atomizing nozzle that pulse excitation and bubble atomizing combine aims at solving the inhomogeneous and operating condition unstability that leads to of bubble quantity bubbling among the prior art and leads to the not good problem of atomization effect because the bubble is too big under the non-optimal operating mode.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an atomizing nozzle that pulse excitation and bubble atomizing combine, includes the cavity, first circular recess has been seted up to the back inner wall of cavity, first circular recess in-connection has the intake pipe, the nozzle has been seted up to the front end of cavity, the spray tube shrink section has been seted up to the back inner wall of nozzle, and the cavity of spray tube shrink section and cavity is linked together, the second circular recess has been seted up on the circumference surface of cavity, and the cavity of second circular recess and cavity is linked together, fixedly connected with pulse inlet in the second circular recess, the lower extreme of pulse inlet is connected with the hose, the downside of hose is equipped with liquid pressure regulation and control mechanism, liquid pressure regulation and control mechanism and hose connection are in order to realize injecting the pulse efflux into the hose.

As a preferable proposal of the utility model, the liquid pressure regulating mechanism comprises a normal pressure liquid inlet, a motor, a fixed cavity, a rotor, a second connecting hole, two first connecting holes, two first flow through holes and four second flow through holes, the fixed cavity is connected with the lower end of the hose, the rotor is rotationally connected with the circumferential inner wall of the fixed cavity, the two first connecting holes and the two first flow through holes are respectively arranged on the upper inner wall and the lower inner wall of the fixed cavity, the second connecting hole is arranged in the middle of the upper end of the rotor, the second connecting holes are respectively matched with the two first connecting holes, the four second flow through holes are all arranged at the upper end of the rotor, and four second flow through holes are evenly distributed, the motor is arranged on the lower side of the fixed cavity, an output shaft of the motor is fixedly connected to the inner wall of the circumference of the second connecting hole, and the hose and the normal-pressure liquid inlet are respectively connected into the two first flow through holes.

As a preferred scheme, the external screw thread has been seted up at the circumference surface rear portion of intake pipe, the internal thread has been seted up to the circumference inner wall of first circular recess, and internal thread and external screw thread phase-match, intake pipe threaded connection is in first circular recess.

As a preferred scheme of the utility model, the upper end of hose is through quick connector fixed connection in the lower extreme of pulse inlet, the lower extreme of hose is through quick connector fixed connection in the first circulation that is located the upside, the upper end of ordinary pressure inlet is through quick connector fixed connection in the first-class through-hole that is located the downside.

As an optimal scheme of the utility model, two the equal fixedly connected with mechanical seal bearing of circumference inner wall of first connecting hole, the output shaft fixed connection of motor is in two mechanical seal bearing's circumference inner wall.

As an optimal scheme of the utility model, the front end of intake pipe is for sealing, a plurality of evenly distributed's aperture has been seted up to the circumferential surface of intake pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in this scheme, owing to adopted the mode of pulse excitation injection, can overcome traditional bubble atomizing bubble quantity gassing inhomogeneous and the unstable shortcoming of operating condition who leads to, utilize the pulse excitation mode to carry out active control to gas quantity and bubble distribution, make the bubble distribute evenly in liquid, the efflux is broken more completely after the nozzle blowout, and one time atomization process is shorter, and the working property is more stable.

2. In this scheme, based on the mode of pulse excitation, overcome traditional bubble atomizing because the too big shortcoming that leads to the atomization effect not good of bubble under non-optimum operating mode, smash big bubble effectively through the pulse efflux, also can obtain fine atomization effect under non-optimum operating mode.

3. In this scheme, the mode that pulse atomization and bubble atomization combine can independently control jet frequency, and it is controllable to realize the atomization effect, restraines the combustion effectively and vibrates, and the burning is abundant more stable.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a perspective view of the present invention;

fig. 2 is a first partial sectional view of the cavity of the present invention;

fig. 3 is a second partial sectional view of the middle chamber of the present invention;

fig. 4 is a partial perspective view of the motor of the present invention;

fig. 5 is a partial exploded view of the middle fixed cavity of the present invention.

In the figure: 1. an air inlet pipe; 2. a cavity; 3. a pulsed liquid inlet; 4. a small hole; 5. a nozzle constriction section; 6. a nozzle; 7. a hose; 8. a normal pressure liquid inlet; 9. a motor; 10. a fixed cavity; 11. a rotor; 12. a mechanical seal bearing; 13. a first connection hole; 14. a first flow through hole; 15. a second flow through hole; 16. and a second connection hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-5, the present invention provides the following technical solutions:

the utility model provides an atomizing nozzle that pulse excitation and bubble atomizing combine, including cavity 2, first circular recess has been seted up to the back inner wall of cavity 2, first circular recess in-connection has intake pipe 1, nozzle 6 has been seted up to the front end of cavity 2, spray tube shrink section 5 has been seted up to the back inner wall of nozzle 6, and spray tube shrink section 5 is linked together with cavity 2's cavity, the second circular recess has been seted up on the circumference surface of cavity 2, and the second circular recess is linked together with cavity 2's cavity, fixedly connected with pulse inlet 3 in the second circular recess, the lower extreme of pulse inlet 3 is connected with hose 7, the downside of hose 7 is equipped with liquid pressure regulation and control mechanism, liquid pressure regulation and control mechanism is connected with hose 7 in order to realize injecting the pulse efflux into hose 7.

In the embodiment of the utility model, the air inlet pipe 1, the cavity 2, the pulse liquid inlet 3, the small hole 4, the nozzle contraction section 5 and the nozzle 6 jointly form an air atomization nozzle, the inner diameter of the air inlet pipe 1 is 4mm, one end of the air inlet pipe 1 extends out of the cavity 2 to be contacted with the outside air, the other end of the air inlet pipe 1 extends into the cavity of the cavity 2 by 20mm, a large number of small bubbles can be injected into the cavity 2 through the air inlet pipe 1, the diameter of the cavity 2 is 10mm, the axial distance is 80mm, the contraction angle of the nozzle contraction section 5 is 100 degrees, the diameter of the nozzle 6 is 0.4mm, the length-diameter ratio is 20, the inner diameter of the pulse liquid inlet 3 is 4mm, the pulse liquid inlet 3 is communicated with the hose 7, the aperture of the hose 7 is 6mm, the pulse jet can be injected into the hose 7 through the liquid pressure regulating mechanism arranged, the pulse jet can interact with the bubble two-phase flow in the cavity 2 after being sprayed out of the pulse liquid inlet 3, therefore, the large bubbles are broken and distributed uniformly, the fluid is accelerated due to compression when passing through the nozzle 6, and then the mist with smaller size and more uniform size is sprayed out from the nozzle 6, preferably, the cavity 2, the motor 9 and the fixed cavity 10 are fixed on a heavy rack, so that the fixed support effect can be realized, and meanwhile, the oscillation generated when the device works can be relieved.

Referring to fig. 1 and 5, the liquid pressure regulating mechanism includes a normal pressure liquid inlet 8, a motor 9, a fixed chamber 10, a rotor 11, a second connecting hole 16, two first connecting holes 13, two first flow holes 14, and four second flow holes 15, the fixed chamber 10 is connected to the lower end of the hose 7, the rotor 11 is rotatably connected to the inner circumferential wall of the fixed chamber 10, the two first connecting holes 13 and the two first flow holes 14 are respectively formed in the upper and lower inner walls of the fixed chamber 10, the second connecting hole 16 is formed in the middle of the upper end of the rotor 11, and the second connection holes 16 are respectively matched with the two first connection holes 13, four second circulation holes 15 are opened at the upper end of the rotor 11, and four second through-flow holes 15 are evenly distributed, the motor 9 is arranged at the lower side of the fixed cavity 10, an output shaft of the motor 9 is fixedly connected to the circumferential inner wall of the second connecting hole 16, and the hose 7 and the normal-pressure liquid inlet 8 are respectively connected into the two first through-flow holes 14.

In this embodiment: the motor 9 can be selected according to different models according to actual needs, for example, the model is selected as Y630-10/1180, the motor 9 is electrically connected with an external power supply, the diameters of the second connecting hole 16 and the two first connecting holes 13 are consistent and are respectively positioned at the circle centers of the fixed cavity 10 and the rotor 11, two first flow through holes 14 with the diameters of 6mm are respectively arranged at the positions 30mm away from the center of the upper inner wall and the lower inner wall of the fixed cavity 10, four second flow through holes 15 with the diameters of 16mm are uniformly distributed at the positions 30mm away from the center of the rotor 11, high-pressure liquid enters the fixed cavity 10 through the normal-pressure liquid inlet 8, since the motor 9 drives the rotor 11 to rotate continuously, the first through holes 14 and the four second through holes 15 are staggered to change the flow area periodically, thereby obtaining a pulsed jet, the jet frequency or the like being preferably adjustable by adjusting the power of the motor 9, the generated pulsed jet being transported through the hose 7 to the bubble atomizing nozzle portion. For those skilled in the art, the motor 9 is prior art and will not be described in detail.

Specifically, referring to fig. 2, the rear portion of the circumferential surface of the air inlet pipe 1 is provided with an external thread, the inner circumferential wall of the first circular groove is provided with an internal thread, the internal thread is matched with the external thread, and the air inlet pipe 1 is connected to the first circular groove in a threaded manner.

In this embodiment: the thread sealing between the air inlet pipe 1 and the cavity 2 can be realized through the arranged internal and external threads, so that air leakage in the cavity 2 is avoided, and the air inlet pipe 1 can be conveniently detached.

Specifically, referring to fig. 1, the upper end of the flexible tube 7 is fixedly connected to the lower end of the pulse liquid inlet 3 through a quick connector, the lower end of the flexible tube 7 is fixedly connected to the first flow through hole 14 located at the upper side through the quick connector, and the upper end of the normal-pressure liquid inlet 8 is fixedly connected to the first flow through hole 14 located at the lower side through the quick connector.

In this embodiment: the device can be conveniently assembled and disassembled through the quick connection plugs.

Specifically referring to fig. 4, the circumferential inner walls of the two first connection holes 13 are fixedly connected with mechanical seal bearings 12, and the output shaft of the motor 9 is fixedly connected to the circumferential inner walls of the two mechanical seal bearings 12.

In this embodiment: the mechanical seal bearing 12 is connected with the output shaft of the motor 9, so that sealing can be realized in the fixed cavity 10, and the mechanical seal bearing 12 can support the rotation of the output shaft, reduce the friction coefficient in the movement process and ensure the rotation precision of the output shaft.

Specifically referring to fig. 3, the front end of the air inlet pipe 1 is a seal, and the circumferential surface of the air inlet pipe 1 is provided with a plurality of evenly distributed small holes 4.

In this embodiment: the circumferential surface of the air inlet pipe 1 is uniformly distributed with 20-40 small holes 4 with the hole diameter smaller than 100 mu m to form a bubble generator, and bubbles can be formed through the air inlet pipe 1 and injected into the cavity of the cavity 2.

The utility model discloses a theory of operation and use flow: high-pressure liquid enters the fixed cavity 10 through the normal-pressure liquid inlet 8, the motor 9 drives the rotor 11 to rotate continuously, the first flow through holes 14 and the four second flow through holes 15 are staggered continuously to change the circulation area periodically, so that pulse jet flow is formed in the fixed cavity 10, the pulse jet flow enters the cavity 2 from the pulse liquid inlet 3 through the hose 7 and interacts with a large amount of bubbles emitted from the wall surface of the air inlet pipe 1 to form bubble-shaped two-phase flow, a large amount of small bubbles are crushed and atomized into droplet fluid, and then the fluid is accelerated through the spray pipe contraction section 5 and is sprayed out from the nozzle 6; the device ingeniously combines the characteristics of pulse atomization and bubble atomization technologies, the independent controllability of the atomization effect is realized, the bubble particle size is smaller and is more uniform in distribution, the average particle size of atomized liquid drops is smaller, the mixing effect with the surrounding environment is better, and the good working performance can be realized under the nonstandard working condition.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An atomizing nozzle combining pulsed energization with bubble atomization, characterized in that: including cavity (2), first circular recess has been seted up to the back inner wall of cavity (2), first circular recess in-connection has intake pipe (1), nozzle (6) have been seted up to the front end of cavity (2), spray tube shrink section (5) have been seted up to the back inner wall of nozzle (6), and spray tube shrink section (5) are linked together with the cavity of cavity (2), the circular recess of second has been seted up on the circumference surface of cavity (2), and the cavity of second circular recess and cavity (2) is linked together, fixedly connected with pulse inlet (3) in the circular recess of second, the lower extreme of pulse inlet (3) is connected with hose (7), the downside of hose (7) is equipped with liquid pressure regulation and control mechanism, liquid pressure regulation and control mechanism is connected with hose (7) in order to realize injecting the pulse jet in hose (7).

2. A pulse excitation and bubble atomization combined atomizing nozzle as set forth in claim 1, wherein: the liquid pressure regulating mechanism comprises a normal pressure liquid inlet (8), a motor (9), a fixed cavity (10), a rotor (11), a second connecting hole (16), two first connecting holes (13), two first flow through holes (14) and four second flow through holes (15), wherein the fixed cavity (10) is connected to the lower end of a hose (7), the rotor (11) is rotatably connected to the inner wall of the circumference of the fixed cavity (10), the two first connecting holes (13) and the two first flow through holes (14) are respectively arranged on the upper inner wall and the lower inner wall of the fixed cavity (10), the second connecting hole (16) is arranged in the middle of the upper end of the rotor (11), the second connecting hole (16) is respectively matched with the two first connecting holes (13), the four second flow through holes (15) are arranged on the upper end of the rotor (11), and the four second flow through holes (15) are uniformly distributed, the motor (9) is arranged on the lower side of the fixed cavity (10), an output shaft of the motor (9) is fixedly connected to the inner wall of the circumference of the second connecting hole (16), and the hose (7) and the normal-pressure liquid inlet (8) are respectively connected to the two first flow through holes (14).

3. A pulse excitation and bubble atomization combined atomizing nozzle as set forth in claim 2, wherein: the rear portion of the circumferential surface of the air inlet pipe (1) is provided with an external thread, the inner wall of the circumference of the first circular groove is provided with an internal thread, the internal thread is matched with the external thread, and the air inlet pipe (1) is in threaded connection with the inside of the first circular groove.

4. A pulse excitation and bubble atomization combined atomizing nozzle as set forth in claim 3, wherein: the upper end of the hose (7) is fixedly connected to the lower end of the pulse liquid inlet (3) through a quick connector, the lower end of the hose (7) is fixedly connected to the first flow through hole (14) on the upper side through the quick connector, and the upper end of the normal-pressure liquid inlet (8) is fixedly connected to the first flow through hole (14) on the lower side through the quick connector.

5. An atomizing nozzle in combination with pulsed excitation and bubble atomization according to claim 4, wherein: the inner wall of the circumference of the first connecting hole (13) is fixedly connected with a mechanical seal bearing (12), and the output shaft of the motor (9) is fixedly connected to the inner wall of the circumference of the two mechanical seal bearings (12).

6. An atomizing nozzle in combination with pulsed energization and bubble atomization according to claim 5, wherein: the front end of intake pipe (1) is for sealing, a plurality of evenly distributed's aperture (4) have been seted up on the circumferential surface of intake pipe (1).