CN115751380B - A micro atomizing nozzle - Google Patents
A micro atomizing nozzle Download PDFInfo
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- CN115751380B CN115751380B CN202211486426.3A CN202211486426A CN115751380B CN 115751380 B CN115751380 B CN 115751380B CN 202211486426 A CN202211486426 A CN 202211486426A CN 115751380 B CN115751380 B CN 115751380B
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Abstract
The invention relates to the technical field of combustion engines, and provides a miniature atomizing spray head which comprises a spray head body, wherein the spray head body is provided with a spray cavity, the spray cavity is provided with a fuel inlet and a fuel spray outlet, a mandrel is arranged in the spray cavity in a sliding and rotating mode, two ends of the mandrel are respectively provided with a blocking end and a blocked end, the mandrel separates the spray cavity into a front cavity and a rear cavity, the blocking end is positioned in the front cavity, the blocked end is positioned in the rear cavity, the fuel inlet is communicated with the rear cavity, the fuel spray outlet is communicated with the front cavity, a spring piece is arranged in the rear cavity, one end acts on the inner wall of the rear cavity, the other end acts on the blocked end to provide a force for blocking the fuel spray outlet, one end of the communication channel is communicated with the front cavity, and the other end of the communication channel is communicated with the rear cavity. Through the technical scheme, the technical problem that the centrifugal atomizing nozzle is difficult to realize instantaneous start and stop of the atomizing nozzle in the related technology is solved.
Description
Technical Field
The invention relates to the technical field of combustion engines, in particular to a miniature atomizing nozzle.
Background
The miniature atomizing nozzle is a core component of an aeroengine combustion chamber, and fuel oil can be subjected to stable combustion after full atomization. The atomizer is generally classified into a pressure atomizer, a pneumatic atomizer, a rotary atomizer, an evaporation tube atomizer, and a combination atomizer. The rotary atomizing nozzle mainly depends on an atomizing device to promote oil atomization, and comprises an oil thrower type atomizing nozzle and a rotary cup type atomizing nozzle, wherein the pressure type atomizing nozzle is divided into a direct type atomizing nozzle, a centrifugal type atomizing nozzle and a reflux type atomizing nozzle, and the centrifugal type atomizing nozzle is divided into a single oil way atomizing nozzle and a double oil way atomizing nozzle. In the prior art, for a centrifugal atomizer, although the fuel atomization amount and the atomization degree can be changed by changing the fuel supply pressure, the instantaneous start and stop of the atomizer are difficult to realize.
Disclosure of Invention
The invention provides a miniature atomizing nozzle, which solves the technical problem that the centrifugal atomizing nozzle is difficult to realize instantaneous start and stop of the atomizing nozzle in the related technology.
The technical scheme of the invention is that the miniature atomizing nozzle comprises
A spray head having a spray chamber with a fuel inlet and a fuel outlet,
The mandrel is arranged in the spray cavity in a sliding and rotating way, the two ends of the mandrel are respectively provided with a plugging end and a quilt top end, the mandrel separates the spray cavity into a front cavity and a rear cavity, the plugging end is positioned in the front cavity, the quilt top end is positioned in the rear cavity, the fuel inlet is communicated with the rear cavity, the fuel ejection port is communicated with the front cavity,
A spring member disposed in the rear chamber, one end of the spring member acting on an inner wall of the rear chamber and the other end of the spring member acting on the top end of the spring member to provide a force by which the blocking end blocks the fuel discharge port,
And one end of the communication channel is communicated with the front cavity, and the other end of the communication channel is communicated with the rear cavity.
As a further technical scheme, the communicating channel is arranged on the mandrel and is spiral, the end face of the top end of the communicating channel is provided with a liquid diversion groove, the liquid diversion groove is obliquely arranged relative to the radial direction of the mandrel, one end of the liquid diversion groove is led to the front cavity, the other end of the liquid diversion groove is communicated with the communicating channel, and the liquid diversion grooves are arranged in a plurality and staggered with the fuel ejection openings.
As a further technical scheme, an annular channel is arranged between the mandrel and the inner wall of the spray cavity.
As a further technical scheme, the mandrel is further provided with a diameter-increased section, the end faces at two ends of the diameter-increased section are respectively a front acting face and a rear acting face, the front acting face is located in the front cavity and acted by hydraulic pressure in the front cavity, and the rear acting face is located in the rear cavity and acted by hydraulic pressure in the rear cavity.
As a further technical solution, the front acting surface and the rear acting surface are sized such that when the hydraulic pressures of the front chamber and the rear chamber are equal, a component force in an axial direction of the hydraulic force applied to the front acting surface by the front chamber is larger than a component force in an axial direction of the hydraulic force applied to the rear acting surface by the rear chamber.
As a further technical scheme, the plugging end is provided with an annular groove.
As a further technical scheme, the side wall of the annular groove far away from the fuel ejection port is a conical annular conical surface, the annular conical surface is provided with a plurality of spiral bulges, and the spiral bulges are circumferentially arranged.
As a further technical scheme, the shower nozzle further comprises a one-way valve, one end of the one-way valve is communicated with the front cavity, the other end of the one-way valve is communicated with the rear cavity, and when the pressure of the one-way valve is enough, liquid flows from the front cavity to the rear cavity, wherein the one-way valve is arranged in the wall of the shower nozzle.
As a further technical scheme, the spray head is also provided with an oxygen channel, and the oxygen channel is communicated with the front cavity.
As a further technical solution, the device further comprises a thrust bearing, wherein the thrust bearing is arranged between the spring piece and the quilt top end.
The working principle and the beneficial effects of the invention are as follows:
The core shaft is arranged in a sliding manner on the spray head, and the core shaft plugs the fuel spray outlet of the spray cavity under the action of the elastic force of the spring piece. The core shaft divides the spray cavity of the spray head into a front cavity and a rear cavity, and the front cavity and the rear cavity can be communicated through the communication channel. When the fuel is sprayed out by the miniature atomization nozzle to burn, the fuel inlet is used for feeding liquid fuel with a certain pressure, the liquid fuel can enter the rear cavity firstly, then enters the front cavity through the communication channel, so that the front cavity and the rear cavity are filled with burning liquid in a short time, after the burning liquid is filled with the burning liquid, the liquid pressure in the front cavity and the liquid pressure in the rear cavity are equal, the plugging end of the mandrel and the top end of the mandrel are respectively positioned in the front cavity and the rear cavity, and the mandrel is arranged in a vertically sliding mode, so that the plugging end and the top end of the mandrel can be respectively subjected to the liquid pressure in two directions. Through the size difference that the shutoff end receives the liquid action face by the top, can satisfy that the shutoff end receives axially downwardly directed liquid pressure to be greater than by the top receive axially upwardly directed liquid pressure and the spring force of spring member action by the top sum, thereby finally realize the dabber and move down and open the fuel jet to realize the purpose that fuel opens the instantaneous stop.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic view of the external structure of the present invention;
FIG. 2 is a schematic side view of embodiment 1 of the present invention;
FIG. 3 is a schematic cross-sectional view of the structure A-A of FIG. 2;
FIG. 4 is a schematic view showing the internal structure of embodiment 1 of the present invention;
FIG. 5 is a schematic diagram of the structure of embodiment 2 of the present invention;
In the figure, a spray head (1), a spray cavity (101), a front cavity (1011), a rear cavity (1012), a fuel inlet (102), a fuel spray outlet (103), a mandrel (2), a plugging end (201), a driven top end (202), a liquid diversion groove (203), a diameter increasing section (204), a front acting surface (2041), a rear acting surface (2042), an annular groove (205), an annular conical surface (206), a spiral protrusion (207), a spring element (3), a connecting channel (4), an annular channel (5) and a one-way valve (6).
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1 to 4, the present embodiment provides a micro-atomizing nozzle 1, which includes
The head 1, the head 1 has a nozzle chamber 101, the nozzle chamber 101 has a fuel inlet 102 and a fuel outlet 103,
The mandrel 2, the mandrel 2 is arranged in the spray cavity 101 in a sliding and rotating way, the two ends are respectively provided with a blocking end 201 and a top end 202, the mandrel 2 divides the spray cavity 101 into a front cavity 1011 and a rear cavity 1012, the blocking end 201 is positioned in the front cavity 1011, the top end 202 is positioned in the rear cavity 1012, the fuel inlet 102 is communicated with the rear cavity 1012, the fuel ejection outlet 103 is communicated with the front cavity 1011,
A spring member 3, the spring member 3 being disposed in the rear cavity 1012, one end acting on the inner wall of the rear cavity 1012, the other end acting on the tip 202, providing a force to block the fuel ejection port 103 by the blocking end 201,
And a connecting channel 4, wherein one end of the connecting channel 4 is communicated with the front cavity 1011, and the other end is communicated with the rear cavity 1012.
In this embodiment, considering that the fuel atomizing nozzle in the prior art cannot reach the instant start and instant stop when in use, and the problem of start stop exists, the sliding arrangement of the mandrel 2 on the nozzle 1 is specially designed to solve the problem, and the mandrel 2 blocks the fuel spraying port 103 of the spray cavity 101 under the action of the elastic force of the spring member 3. The spindle 2 divides the spray chamber 101 of the spray head 1 into a front chamber 1011 and a rear chamber 1012, and the front chamber 1011 and the rear chamber 1012 can communicate through the communication passage 4. When the fuel is required to be sprayed out for combustion by the micro atomization nozzle, the fuel inlet 102 is used for feeding liquid fuel with a certain pressure, the liquid fuel can firstly enter the rear cavity 1012 and then enter the front cavity 1011 through the connecting channel 4, so that the front cavity 1011 and the rear cavity 1012 are filled with combustion liquid in a short time, after the combustion liquid is filled with the combustion liquid, the liquid pressure in the front cavity 1011 and the rear cavity 1012 is equal, the plugging end 201 and the top end 202 of the mandrel 2 are respectively positioned in the front cavity 1011 and the rear cavity 1012, and the mandrel 2 is vertically and slidably arranged, so that the plugging end 201 and the top end can be respectively subjected to the liquid pressure in two directions. By designing the difference of the sizes of the liquid acting surfaces of the plugging end 201 and the top end 202, the purposes that the liquid pressure of the plugging end 201 in the axial direction is larger than the sum of the liquid pressure of the top end 202 in the axial direction and the elastic force of the spring element 3 acting on the top end 202, and finally the mandrel 2 moves downwards to open the fuel ejection port 103 can be achieved, and the purpose of fuel instant start and instant stop can be achieved.
Specifically, no matter the plugging end 201 or the plugging end 202 is subjected to the hydraulic pressure, besides the component force can not be generated in the axial direction by the hydraulic pressure received by the vertical radial surface, the component force can be generated in the axial direction of the mandrel 2 by the force received by other surfaces in contact with the fuel liquid, the sum of the generated component force is determined by the projection area of the surface in contact with the fuel liquid on the vertical axial surface, in a word, the projection area of the plugging end 201 on the vertical axial surface is larger than the projection area of the plugging end 202 on the vertical axial surface, so that the liquid pressure received by the plugging end 201 is larger, the fuel ejection opening 103 is opened under the action of the liquid pressure, the plugging of the fuel ejection opening 103 under the action of the spring member 3 when no liquid fuel is sent is skillfully realized, and the instant opening of the fuel liquid pressure is realized when the fuel is sent, and the mandrel 2 and the liquid fuel are all positioned on the same side of the fuel ejection opening 103, therefore, the instant opening and closing of the fuel ejection opening 103 can be realized, and the defect that the fuel ejection cannot be realized in the prior art is overcome.
Further, the communication channel 4 is arranged on the mandrel 2 and is spiral, the end face of the top end 202 is provided with a liquid diversion groove 203, the liquid diversion groove 203 is obliquely arranged relative to the radial direction of the mandrel 2, one end of the liquid diversion groove 203 is communicated with the front cavity 1011, and the other end of the liquid diversion groove is communicated with the communication channel 4, wherein the liquid diversion grooves 203 are arranged in a plurality and staggered with the fuel ejection holes 103.
In this embodiment, in order to realize that the fuel ejected from the fuel ejection port 103 is more uniform, the communication channel 4 is designed to be in the mandrel 2 and is spiral, when the liquid fuel flows through the communication channel 4, the liquid fuel will spiral, and under the action of the flowing liquid fuel, the mandrel 2 will be driven to rotate at a high speed, so that the pressure of the rotation generated by the fuel ejection port 103 is released, and finally, the rotary high-pressure cylindrical spray is realized, and the rotary spray is skillfully realized.
In this embodiment, in order to compress the spring member 3 more stably when the spindle 2 rotates, keep the fuel ejection port 103 stably opened, and feed the liquid fuel delivered from the connecting channel 4 when the liquid diversion groove 203 is provided on the end surface of the top end 202, because the liquid diversion groove 203 is inclined with respect to the radial direction of the spindle 2, when the liquid fuel flows through the diversion groove, a downward spinning effect can be generated with respect to the spring member 3, so that the spring member 3 is compressed more stably, and the fuel ejection port 103 is ensured to be opened stably further. The number of the liquid diversion grooves 203 is two or three, and the liquid diversion grooves 203 are required to be obliquely arranged, so that the purposes of further rotating the mandrel 2 and pressing down the spring after rotating the mandrel are achieved, and the liquid diversion grooves 203 are staggered with the fuel ejection openings 103, so that the fuel ejection openings 103 are not affected when being blocked. Wherein, the spring element 3 is a suitable compression spring.
Further, the mandrel 2 further has an enlarged diameter section 204, and end surfaces at both ends of the enlarged diameter section 204 are a front acting surface 2041 and a rear acting surface 2042, respectively, the front acting surface 2041 being located in the front cavity 1011 and being acted upon by the hydraulic pressure in the front cavity 1011, and the rear acting surface 2042 being located in the rear cavity 1012 and being acted upon by the hydraulic pressure in the rear cavity 1012.
Further, the front acting surface 2041 and the rear acting surface 2042 are sized such that when the hydraulic pressures of the front chamber 1011 and the rear chamber 1012 are equal, the component force in the axial direction of the hydraulic force of the front acting surface 2041 received by the front chamber 1011 is larger than the component force in the axial direction of the hydraulic force of the rear acting surface 2042 received by the rear chamber 1012.
In this embodiment, in order to satisfy the above-mentioned design that the projected area on the vertical axial surface of the plugging end 201 is larger than the projected area on the vertical axial surface of the plugging end 202, the mandrel 2 is designed to have a diameter-increased section 204, so that there are a front acting surface 2041 and a rear acting surface 2042, the front acting surface 2041 and the rear acting surface 2042 are respectively located in the front cavity 1011 and the rear cavity 1012, and after the projected area on the vertical axial surface of the front acting surface 2041 is larger than the projected area on the vertical axial surface of the rear acting surface 2042, it can be satisfied that the projected area on the vertical axial surface of the plugging end 201 is larger than the projected area on the vertical axial surface of the plugging end 202, that is, the resultant force applied to the mandrel 2 is downward, so that the fuel ejection port 103 is opened under the action of the liquid fuel pressure.
Further, a thrust bearing is included, which is provided between the spring member 3 and the quilt top end 202.
In this embodiment, in order to ensure that the spindle 2 rotates more stably and reduce friction loss, a thrust bearing is disposed between the spring member 3 and the quilt top end 202, so that the rotation effect of the spindle 2 is improved well, and the rotation effect of the spindle 2 can be achieved well even if the slower liquid fuel flows through the spiral communication channel 4.
Further, the blocking end 201 has an annular groove 205.
Further, the side wall of the annular groove 205 away from the fuel ejection port 103 is a tapered annular tapered surface 206, and the annular tapered surface 206 has a plurality of spiral protrusions 207, and the spiral protrusions 207 are circumferentially arranged.
In this embodiment, the plugging end 201 is further provided with an annular groove 205, and the side wall of the annular groove 205 away from the fuel spraying hole 103 is a conical annular conical surface 206, and when the annular conical surface 206 rotates, a plurality of spiral protrusions 207 can make the spindle 2 generate downward thrust when rotating, so that the stabilizing effect of the spindle 2 moving downwards to open the fuel spraying hole 103 is further improved.
In this embodiment, the structure for realizing the movement of the spindle 2 to open the fuel ejection port 103 is designed to have a plurality of parts, including the difference in size between the front acting surface 2041 and the rear acting surface 2042, including the liquid diversion groove 203, including the spiral protrusion 207, and the functions of the three parts are mutually matched, and when one part of the functions of the structure realizes the smaller downward movement of the spindle 2 to open the fuel ejection port 103, the functions of the other parts of the structures are increased, so that the functions of the three parts have positively correlated matching functions.
Further, the shower nozzle further comprises a one-way valve 6, one end of the one-way valve 6 is communicated with the front cavity 1011, the other end is communicated with the rear cavity 1012, and the one-way valve 6 is arranged in the wall of the shower nozzle 1, wherein liquid flows from the front cavity 1011 to the oral cavity when the pressure is large enough.
In this embodiment, considering that when the liquid in the front cavity 1011 sprays atomized fuel to the fuel spraying hole 103, if the pressure in the front cavity 1011 is too high and the pressure in the rear cavity is changed at this time, the mandrel 2 will eventually move down to generate fluctuation, which will cause the fluctuation of the opening of the fuel spraying hole 103, so that the problem of too much liquid fuel spraying occurs, for this reason, the check valve 6 is disposed between the front cavity 1011 and the rear cavity 1012, so that when the front cavity 1011 receives the fluctuation pressure to be too high, the pressure can be sent out by timely opening, and the occurrence of too large pressure fluctuation can be avoided.
Further, the head 1 further has an oxygen passage communicating with the front chamber 1011.
In this embodiment, the oxygen channel of the nozzle 1 can send oxygen to the front cavity 1011 when needed, and can blow the air inlet of the oxygen channel toward the mandrel 2, so that the mandrel 2 can move under the blowing of oxygen, and the fuel ejection outlet 103 is opened, thereby playing an auxiliary starting role for fuel ejection.
Example 2
As shown in fig. 5, the present embodiment provides a micro atomizer 1, which comprises
The head 1, the head 1 has a nozzle chamber 101, the nozzle chamber 101 has a fuel inlet 102 and a fuel outlet 103,
The mandrel 2, the mandrel 2 is arranged in the spray cavity 101 in a sliding and rotating way, the two ends are respectively provided with a blocking end 201 and a top end 202, the mandrel 2 divides the spray cavity 101 into a front cavity 1011 and a rear cavity 1012, the blocking end 201 is positioned in the front cavity 1011, the top end 202 is positioned in the rear cavity 1012, the fuel inlet 102 is communicated with the rear cavity 1012, the fuel ejection outlet 103 is communicated with the front cavity 1011,
A spring member 3, the spring member 3 being disposed in the rear cavity 1012, one end acting on the inner wall of the rear cavity 1012, the other end acting on the tip 202, providing a force to block the fuel ejection port 103 by the blocking end 201,
And a connecting channel 4, wherein one end of the connecting channel 4 is communicated with the front cavity 1011, and the other end is communicated with the rear cavity 1012.
Further, the communication channel 4 is arranged on the mandrel 2 and is spiral, the end face of the top end 202 is provided with a liquid diversion groove 203, the liquid diversion groove 203 is obliquely arranged relative to the radial direction of the mandrel 2, one end of the liquid diversion groove 203 is communicated with the front cavity 1011, and the other end of the liquid diversion groove is communicated with the communication channel 4, wherein the liquid diversion grooves 203 are arranged in a plurality and staggered with the fuel ejection holes 103.
Further, an annular channel 5 is provided between the mandrel 2 and the inner wall of the spray chamber 101.
In this embodiment, the difference from embodiment 1 is that the annular channel 5 is further provided between the spindle 2 and the inner wall of the spray cavity 101, the design of the annular channel 5 does not affect the rotation of the spindle 2 by the liquid fuel in the connecting channel 4 and the liquid diversion channel 203, and a part of the liquid fuel can be refluxed to make the spindle 2 rotate more stably and realize the internal circulation of the liquid fuel, so that the advantage of more stable combustion is provided.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211486426.3A CN115751380B (en) | 2022-11-24 | 2022-11-24 | A micro atomizing nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211486426.3A CN115751380B (en) | 2022-11-24 | 2022-11-24 | A micro atomizing nozzle |
Publications (2)
| Publication Number | Publication Date |
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| CN115751380A CN115751380A (en) | 2023-03-07 |
| CN115751380B true CN115751380B (en) | 2025-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211486426.3A Active CN115751380B (en) | 2022-11-24 | 2022-11-24 | A micro atomizing nozzle |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108313A (en) * | 2021-04-01 | 2021-07-13 | 中国科学院工程热物理研究所 | Single-way oil supply self-adaptive double-membrane fuel oil atomization device |
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| DE3833279A1 (en) * | 1987-10-23 | 1989-05-03 | Westinghouse Electric Corp | FUEL NOZZLE FOR GAS TURBINES |
| DE4029020A1 (en) * | 1990-09-13 | 1992-03-19 | Schaefer Stettiner Schrauben | Valve for oil flow control for burner - opens only when pressure insufficiently high to maintain steady flow |
| CN2221693Y (en) * | 1995-07-06 | 1996-03-06 | 高广兴 | Gas safety valve |
| CA2175272C (en) * | 1996-04-29 | 2000-09-12 | Marcel Caminada | Nozzle closing valve, as well as pressure atomizer nozzle having such a nozzle closing valve |
| CN106642202B (en) * | 2016-12-23 | 2019-02-12 | 中航空天发动机研究院有限公司 | A kind of flame stabilizer for the Asia TBCC burning ramjet combustion chamber |
| CN207951772U (en) * | 2017-12-14 | 2018-10-12 | 唐兵 | A kind of fluid injector |
| JP2019188290A (en) * | 2018-04-20 | 2019-10-31 | パナソニックＩｐマネジメント株式会社 | Spray device |
| CN109540529B (en) * | 2018-11-21 | 2020-09-22 | 中国航发北京航科发动机控制系统科技有限公司 | Equivalent nozzle simulation tool |
| CN110608100B (en) * | 2019-10-23 | 2020-12-29 | 中国科学院工程热物理研究所 | A dual-oil circuit aero-engine fuel drain device |
| CN111513574A (en) * | 2019-12-13 | 2020-08-11 | 广州富港万嘉智能科技有限公司 | Intelligent kitchen ware |
| CN213743698U (en) * | 2020-12-08 | 2021-07-20 | 保定市玄云涡喷动力设备研发有限公司 | Aircraft engine ignition structure with atomizing nozzle |
| CN113719860B (en) * | 2021-08-30 | 2024-11-12 | 上海和兰透平动力技术有限公司 | Fuel atomizing nozzle for duty |
| CN114289202B (en) * | 2021-12-01 | 2025-02-18 | 中国船舶集团有限公司第七一一研究所 | A mechanical atomizing nozzle with self-adjustable spray hole cross-sectional area |
| CN216588892U (en) * | 2022-02-23 | 2022-05-24 | 贵州华恒航品科技开发有限公司 | Aircraft engine oil pump case |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113108313A (en) * | 2021-04-01 | 2021-07-13 | 中国科学院工程热物理研究所 | Single-way oil supply self-adaptive double-membrane fuel oil atomization device |
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