CN204438110U - A kind of Double screw leading medium atomization nozzle - Google Patents

A kind of Double screw leading medium atomization nozzle Download PDF

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Publication number
CN204438110U
CN204438110U CN201520047831.4U CN201520047831U CN204438110U CN 204438110 U CN204438110 U CN 204438110U CN 201520047831 U CN201520047831 U CN 201520047831U CN 204438110 U CN204438110 U CN 204438110U
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China
Prior art keywords
cap
oil
nozzle
fuel
oil suction
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520047831.4U
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Chinese (zh)
Inventor
郑志伟
仇性启
李大树
崔运静
惠媛媛
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China University of Petroleum Beijing CUPB
China University of Petroleum UPC East China
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China University of Petroleum UPC East China
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Priority to CN201520047831.4U priority Critical patent/CN204438110U/en
Application granted granted Critical
Publication of CN204438110U publication Critical patent/CN204438110U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a kind of Double screw leading medium atomization nozzle.Its technical scheme is: evenly have secondary air hole, compression fit between oil suction cap and fuel sucking pipe in the peripheral circumference of oil spout cap, oil suction cap and oil spout cap are compression fit; Second cyclone is positioned between oil spout cap and cap of spraying nozzle, and by being fixed, the center drilling of oil suction cap is as nozzle opening, the peripheral circumferential direction of oil suction cap evenly offers one-level eddy flow groove, nozzle opening is spout near nozzle place, by pressure reduction, sucks fuel oil.Beneficial effect is: simplify oil-servicing facilities, reduce the danger of oil supply system, realize combustion power continuously adjustabe, improve amount of fuel simultaneously, ensure that good atomizing effect, length of flame when shortening jet combustion, ensure all even stability of ignition temperature field, improve efficiency of combustion, economize energy.This types of nozzles compact conformation, easy and simple to handle, decrease the weight of microburner, be easy to carry about with one, there is practicality widely.

Description

A kind of Double screw leading medium atomization nozzle
Technical field
The utility model relates to a kind of fuel atomizer of microburner, particularly a kind of Double screw leading medium atomization nozzle.
Background technology
Along with apparatus for fuel heating a large amount of uses in the industry, energy problem becomes increasingly conspicuous.Nozzle is one of burner core component, and its major function enters in gas medium by Liquid inject, and make it to disperse and be broken into droplet, its atomization directly affects evaporation rate and combustion stability.Droplet sizes is excessive or atomization cone angle is excessive, and drop is ejected in burner inner liner head and combustion chamber wall surface, causes hot-spot ablation; Atomization cone angle is too small or penetration distance is excessive, and drop concentrates on the burning of burner inner liner immediate vicinity, burns insufficient, is formed and smolders or carbon deposit.Fuel atomizer not only provides gas-liquid mixture, realizes atomization, and sprayed oil beam will form the flow field of mating with chamber structure simultaneously, ensures temperature distribution evenness, improves efficiency of combustion, economize energy.
The nozzle of general microburner mostly is centrifugal pressure atomized fog jet, and liquid pressure energy is converted into kinetic energy, forms high-velocity liquid jet, and jet surface forms fluctuation, unstability fragmentation atomization.This atomizing type is simple, but needs certain input pressure, and this proposes very high requirement to oily pump performance, and oil pump increases the weight of microburner simultaneously, not portable.The present invention adopts the mode of two-stage air-eddy flow, produces larger negative pressure region, under differential pressure action, normal pressure fuel oil injection is entered nozzle in nozzle interior, relies on rotary gas shearing force to overcome surface tension of liquid, is broken into fine drop.Twin-stage rotational flow air can strengthen ejector action, improves amount of fuel, carries out secondary-atomizing, improve atomized flow field structure, increase the recirculating zone of burning simultaneously to fuel oil, shortens flame.This nozzle can reduce the power consumption of oil pump, reduces the danger of oil supply system, realizes oil-gas ratin continuously adjustabe, improve amount of fuel simultaneously, strengthen atomizing effect, shorten the length of flame, significantly reduce processing cost, compact conformation, easy and simple to handle, economize energy, is applicable to microburner.
Chinese Patent Application No. 00267938.8 " self sucking nozzle humidifying device " adopts the self sucking nozzle of your structure of daraf(reciprocal of farad), different cross section gaseous state parameter change is utilized to produce negative pressure, water jet is entered nozzle, and this injection mode is simple, but atomizing effect is not suitable for burner.Chinese Patent Application No. 200820123302.8 " a kind of Self-priming swirl pneumatic atomizing nozzle " adopts vortex lead jetting mode to realize fuel oil injection and atomization, but its injection amount of fuel is less, and hydrocarbon distribution is unreasonable.The mode that Chinese Patent Application No. 200810227534.2 " a kind of double-stage injection type pre-film pneumatic atomizing nozzle " adopts direct current and eddy flow to combine solves the less problem of Self-priming swirl pneumatic atomizing nozzle injection oil mass, but due to the effect of central straight gas, Spray Penetration is increased rapidly, cause combustion flame longer, form flame and the unmatched problem of chamber structure, efficiency of combustion is very low, higher fuel delivery and combustion stability can not be ensured simultaneously, be unsuitable for small fuel oil burner.
Summary of the invention
The purpose of this utility model is exactly in view of the foregoing defects the prior art has, a kind of Double screw leading medium atomization nozzle is provided, realize oil-gas ratin continuously adjustabe, ensure higher amount of fuel and good atomizing effect, solve the problem that oil pump consumes energy and flame is long of microburner simultaneously.
Its technical scheme is: be made up of second cyclone, oil spout cap, oil suction cap, cap of spraying nozzle, fuel sucking pipe, air hose, thread connection is passed through between air hose and cap of spraying nozzle, thread connection is passed through between fuel sucking pipe and cap of spraying nozzle, and evenly have in the peripheral circumference of fuel sucking pipe and be provided with multiple airport, as air intlet; By thread connection or compression fit between oil spout cap and cap of spraying nozzle, and evenly have secondary air hole, compression fit between oil suction cap and fuel sucking pipe in the peripheral circumference of oil spout cap, oil suction cap and oil spout cap are compression fit; Second cyclone is positioned between oil spout cap and cap of spraying nozzle, and by being fixed, the center drilling of oil suction cap is as nozzle opening, the peripheral circumferential direction of oil suction cap evenly offers one-level eddy flow groove, nozzle opening is spout near nozzle place, by pressure reduction, sucks fuel oil.
Wherein, second cyclone adopts radial swirler or axial swirler, and the eddy flow direction of one-level eddy flow groove and second cyclone adopts in the same way or incorgruous.
The centre bore of above-mentioned oil spout cap is Venturi tube structure.
The beneficial effects of the utility model are: by the reasonable combination to one-level eddy flow groove, second cyclone, oil suction cap and oil spout cap, district of local decompression is formed inside and outside spout, utilize pressure reduction that normal pressure fuel oil injection is entered nozzle, do not need oil pump feed, ensure that higher amount of fuel, simplify oil-servicing facilities; Fuel oil soakage depends on magnitude of pressure differential completely simultaneously, and the flow parameter of air changes, and the flow of fuel oil is also along with change, and ratio is adjustable simultaneously can to realize oil gas like this, i.e. combustion power continuously adjustabe; Fuel oil in nozzle forms preliminary drop under the shear action of air, and after spout ejection, be subject to impact and the shearing of swirl flow air, central fuel is rapidly atomized into the minimum mist of oil of particle diameter, and atomization quality is very high; After increasing swirl flow air, nozzle exterior recirculating zone increases, and atomization cone angle increases, and makes drop of the flame when burning, and Temperature Distribution is more even, reduces discharged nitrous oxides.This Double screw leading medium atomization nozzle simplifies oil-servicing facilities, reduce the danger of oil supply system, realize combustion power continuously adjustabe, improve amount of fuel simultaneously, ensure that good atomizing effect, length of flame when shortening jet combustion, ensure all even stability of ignition temperature field, improve efficiency of combustion, economize energy.This types of nozzles compact conformation, easy and simple to handle, decrease the weight of microburner, be easy to carry about with one, there is practicality widely.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model;
Accompanying drawing 2 is A-A cross-sectional view of the present utility model;
Accompanying drawing 3 is right views of second cyclone of the present utility model;
In upper figure: second cyclone 1, oil spout cap 2, oil suction cap 3, cap of spraying nozzle 4, fuel sucking pipe 5, air hose 6, spout a, one-level eddy flow groove b, secondary air hole c, nozzle opening d, airport e.
Detailed description of the invention
1-3 by reference to the accompanying drawings, the utility model will be further described:
The utility model is made up of second cyclone 1, oil spout cap 2, oil suction cap 3, cap of spraying nozzle 4, fuel sucking pipe 5, air hose 6, thread connection is passed through between air hose 6 and cap of spraying nozzle 4, thread connection is passed through between fuel sucking pipe 5 and cap of spraying nozzle 4, and evenly have in the peripheral circumference of fuel sucking pipe 5 and be provided with multiple airport e, as air intlet; By thread connection or compression fit between oil spout cap 2 and cap of spraying nozzle 4, and evenly have secondary air hole c in the peripheral circumference of oil spout cap 4, compression fit between oil suction cap 3 and fuel sucking pipe 5, oil suction cap 3 and oil spout cap 2 are compression fit; Second cyclone 1 is positioned between oil spout cap 2 and cap of spraying nozzle 4, and by being fixed, the center drilling of oil suction cap 3 is as nozzle opening d, the peripheral circumferential direction of oil suction cap 3 evenly offers one-level eddy flow groove b, nozzle opening d is spout a near nozzle place, by pressure reduction, sucks fuel oil.
Wherein, second cyclone 1 adopts radial swirler or axial swirler, and the eddy flow direction of one-level eddy flow groove b and second cyclone 1 adopts in the same way or incorgruous.
The centre bore of above-mentioned oil spout cap 2 is Venturi tube structure.
Its course of work is as follows: compressed air feeds from air hose 6, the airport e of circumferentially even cloth between cap of spraying nozzle 4 and fuel sucking pipe 5, air is divided into two-way, enter secondary air hole c and one-level eddy flow groove b respectively, the air through one-level eddy flow groove b forms High Rotation Speed eddy current in the center cavity of oil spout cap 2.Under centrifugal action, radially there is pressure reduction in air pressure, reduces gradually, and reach negative pressure in central area from Bian Bidao center.The normal pressure fuel oil connecting fuel sucking pipe 5 is entered nozzle by injection under the effect of pressure reduction, reaches the oil jet d of oil suction cap 3, feeds the center cavity of oil spout cap 2.Be subject to the effect of centrifugal force, fuel oil by air driven by center to limit wall two lateral movement, form preliminary oil film, spray large drop from spout a.Swirling eddy is formed through second cyclone by the air of secondary air hole c, secondary rotating air-flow can increase the turbulence level on spraying jet surface, large drop is subject to high speed impact and the friction of outside air, and rapid atomization becomes the mist of oil of fine particle size, makes atomized flow field distribution more reasonable.Simultaneously swirl flow air is increased export the adverse pressure gradient at place further, is communicated with, increases negative pressure value, raising injection oil mass with the negative pressure region in nozzle.And under rotating jet effect, nozzle exterior recirculating zone increases, flame during burning also can shorten, and Temperature Distribution is more even.

Claims (3)

1. a Double screw leading medium atomization nozzle, it is characterized in that: be made up of second cyclone (1), oil spout cap (2), oil suction cap (3), cap of spraying nozzle (4), fuel sucking pipe (5), air hose (6), thread connection is passed through between air hose (6) and cap of spraying nozzle (4), thread connection is passed through between fuel sucking pipe (5) and cap of spraying nozzle (4), and evenly have in fuel sucking pipe (5) peripheral circumference and be provided with multiple airport (e), as air intlet; By thread connection or compression fit between oil spout cap (2) and cap of spraying nozzle (4), and evenly have secondary air hole (c) in oil spout cap (4) peripheral circumference, compression fit between oil suction cap (3) and fuel sucking pipe (5), oil suction cap (3) and oil spout cap (2) they are compression fit; Second cyclone (1) is positioned between oil spout cap (2) and cap of spraying nozzle (4), by being fixed, the center drilling of oil suction cap (3) is as nozzle opening (d), the peripheral circumferential direction of oil suction cap (3) evenly offers one-level eddy flow groove (b), nozzle opening (d) is spout (a) near nozzle place, by pressure reduction, suck fuel oil.
2. a kind of Double screw leading medium atomization nozzle according to claim 1, it is characterized in that: second cyclone (1) adopts radial swirler or axial swirler, and the eddy flow direction of one-level eddy flow groove (b) and second cyclone (1) adopts in the same way or incorgruous.
3. a kind of Double screw leading medium atomization nozzle according to claim 1, is characterized in that: the centre bore of described oil spout cap (2) is Venturi tube structure.
CN201520047831.4U 2015-01-23 2015-01-23 A kind of Double screw leading medium atomization nozzle Expired - Fee Related CN204438110U (en)

Priority Applications (1)

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CN201520047831.4U CN204438110U (en) 2015-01-23 2015-01-23 A kind of Double screw leading medium atomization nozzle

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CN201520047831.4U CN204438110U (en) 2015-01-23 2015-01-23 A kind of Double screw leading medium atomization nozzle

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106594802A (en) * 2016-11-29 2017-04-26 同济大学 Double swirl lean premixing spray nozzle and application thereof
CN109519315A (en) * 2018-10-16 2019-03-26 安徽省飞腾航空科技有限公司 A kind of light aircraft two stroke engine atomizer and its working method
CN111911961A (en) * 2020-09-02 2020-11-10 西安交通大学 Natural gas high-proportion hydrogen-blending combustion burner
CN112361331A (en) * 2019-10-11 2021-02-12 中国石油大学(华东) Plateau type fuel oil burner with high injection smoke and design method
CN112413580A (en) * 2020-11-27 2021-02-26 扬州大学 Heavy oil burner using bubble atomizing nozzle and operation method thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106594802A (en) * 2016-11-29 2017-04-26 同济大学 Double swirl lean premixing spray nozzle and application thereof
CN106594802B (en) * 2016-11-29 2019-02-01 同济大学 A kind of poor premixing nozzle of double-cyclone and its application
CN109519315A (en) * 2018-10-16 2019-03-26 安徽省飞腾航空科技有限公司 A kind of light aircraft two stroke engine atomizer and its working method
CN112361331A (en) * 2019-10-11 2021-02-12 中国石油大学(华东) Plateau type fuel oil burner with high injection smoke and design method
CN112361331B (en) * 2019-10-11 2022-04-29 中国石油大学(华东) Plateau type fuel oil burner with high injection smoke and design method
CN111911961A (en) * 2020-09-02 2020-11-10 西安交通大学 Natural gas high-proportion hydrogen-blending combustion burner
CN111911961B (en) * 2020-09-02 2021-07-06 西安交通大学 Natural gas high-proportion hydrogen-blending combustion burner
CN112413580A (en) * 2020-11-27 2021-02-26 扬州大学 Heavy oil burner using bubble atomizing nozzle and operation method thereof

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Granted publication date: 20150701

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