CN110976120B - Centrifugal paint nozzle for accelerating atomization by reverse airflow - Google Patents

Centrifugal paint nozzle for accelerating atomization by reverse airflow Download PDF

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Publication number
CN110976120B
CN110976120B CN201911256254.9A CN201911256254A CN110976120B CN 110976120 B CN110976120 B CN 110976120B CN 201911256254 A CN201911256254 A CN 201911256254A CN 110976120 B CN110976120 B CN 110976120B
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China
Prior art keywords
cavity
reverse airflow
flow guide
cyclone chamber
reverse
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CN201911256254.9A
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Chinese (zh)
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CN110976120A (en
Inventor
郭艳丽
李南
郭世峰
张昊
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Aerospace Research Institute of Materials and Processing Technology
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Aerospace Research Institute of Materials and Processing Technology
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Priority to CN201911256254.9A priority Critical patent/CN110976120B/en
Publication of CN110976120A publication Critical patent/CN110976120A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02Spray pistols; Apparatus for discharge
    • B05B7/10Spray pistols; Apparatus for discharge producing a swirling discharge
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2489Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device
    • B05B7/2491Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device an atomising fluid, e.g. a gas, being supplied to the discharge device characterised by the means for producing or supplying the atomising fluid, e.g. air hoses, air pumps, gas containers, compressors, fans, ventilators, their drives
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
    • B05B7/262Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device a liquid and a gas being brought together before entering the discharge device

Abstract

The invention relates to a centrifugal paint nozzle for accelerating atomization by reverse airflow, which comprises a feeding cavity, a flow guide cavity, a material storage cavity, a cyclone chamber, a flow guide pipe and a reverse airflow cap, wherein the flow guide cavity is fixedly connected to the bottom of the feeding cavity, the material storage cavity is fixedly connected to the bottom of the flow guide cavity, the cyclone chamber is fixedly connected to the middle part of the bottom end of the material storage cavity, the flow guide pipe is erected between the flow guide cavity and the material storage cavity, the reverse airflow cap is erected on the flow guide pipe, the reverse airflow cap is positioned at a discharge port of the cyclone chamber, and gas is introduced into the flow guide pipe and reversely flows into the cyclone chamber from the reverse airflow cap.

Description

Centrifugal paint nozzle for accelerating atomization by reverse airflow
Technical Field
The invention relates to the technical field of paint spraying, in particular to a centrifugal paint nozzle for accelerating atomization by reverse airflow.
Background
With the continuous development of aviation technology, the application of the composite material becomes wider, which puts higher requirements on the paint spraying process, and the quality of the spraying quality is directly related to the service life and the performance of the composite material; the quality of the spray is largely determined by the performance of the nozzle, so the design and optimization of the nozzle is one of the key technologies in the field of aviation.
The traditional aviation coating nozzle mainly comprises a pressure atomizing nozzle, an air atomizing nozzle and the like, wherein the coating is atomized into fine particles by using high-pressure coating or high-pressure air, and then the fine particles are sprayed, so that the high requirement on the pressure of the coating and the air is met, and certain potential safety hazard is brought; meanwhile, the high pressure is arranged at the outlet of the nozzle, so that paint is inevitably sprayed in the spraying process, and the paint is wasted and sprayed unevenly; in addition, the spray cone angle generally cannot be changed after the nozzle is selected, which greatly affects the spray efficiency and application scenario.
Accordingly, in response to the above deficiencies, it would be desirable to provide a centrifugal paint nozzle with reverse airflow to accelerate atomization.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problems that high pressure is needed and splashing can occur during spraying.
(II) technical scheme
In order to solve the technical problem, the invention provides a centrifugal paint nozzle for accelerating atomization by reverse airflow, which comprises a feeding cavity, a flow guide cavity, a storage cavity, a cyclone chamber, a flow guide pipe and a reverse airflow cap, wherein the flow guide cavity is fixedly connected to the bottom of the feeding cavity, the storage cavity is fixedly connected to the bottom of the flow guide cavity, the cyclone chamber is fixedly connected to the middle part of the bottom end of the storage cavity, the flow guide pipe is erected between the flow guide cavity and the storage cavity, the reverse airflow cap is erected on the flow guide pipe, the reverse airflow cap is positioned at a discharge port of the cyclone chamber, and gas is introduced into the flow guide pipe and reversely flows into the cyclone chamber from the.
By adopting the technical scheme, the coating enters the nozzle through the feeding cavity, enters the storage cavity after being rectified by the flow guide cavity, and then enters the cyclone chamber through the feeding hole of the cyclone chamber to form coating cyclone; meanwhile, gas is guided into the flow guide pipe, reverse airflow is formed under the action of the reverse airflow cap, and the reverse airflow and the paint rotational flow interact at the outlet of the nozzle, so that the atomization of the paint can be accelerated, and the uniformity of the atomization of the paint can be improved.
As a further explanation of the invention, it is preferred that the air outlet of the reverse airflow cap extends outside the cyclone chamber.
By adopting the technical scheme, the atomizing efficiency can be improved while the coating can be sprayed out of the nozzle.
As a further explanation of the present invention, it is preferable that the ratio of the length of the reverse airflow cap protruding out of the swirling chamber to the diameter of the reverse airflow cap is 0.4 to 0.6.
By adopting the technical scheme, the coating can be prevented from contacting with the reverse airflow cap, and the maximum effect of accelerating atomization of the reverse airflow is ensured.
As a further explanation of the present invention, preferably, a spiral feed inlet is disposed on an outer wall of the cyclone chamber, one end of the feed inlet is communicated with the storage cavity, and the other end of the feed inlet is communicated with the cyclone chamber.
By adopting the technical scheme, the layered rotational flow of the coating in the rotational flow chamber can be realized, and the atomization uniformity of the coating is promoted.
As a further explanation of the invention, preferably, the swirl chamber is distributed with a plurality of feed inlets at intervals along the axial direction, the ratio of the caliber of the feed inlets to the caliber of the inner cavity of the swirl chamber is 0.001-0.003, and the ratio of the height of the swirl chamber to the caliber of the inner cavity of the swirl chamber is 0.7-0.95.
Through adopting above-mentioned technical scheme, feed inlet circumference is evenly arranged, has guaranteed the homogeneity of the interior coating flow field of swirl chamber, and the aperture ratio has guaranteed that coating can get into the swirl chamber smoothly to have certain circumference speed, highly form rotatory liquid film in the swirl chamber with aperture ratio assurance simultaneously, and then do benefit to the breakage of coating.
As a further explanation of the present invention, preferably, the flow guiding pipe includes a transverse pipe and a longitudinal pipe, the axial direction of the transverse pipe is perpendicular to the axial direction of the flow guiding chamber, the transverse pipe penetrates through the joint of the flow guiding chamber and the material storage chamber, one end of the longitudinal pipe is fixedly connected with the transverse pipe, the other end of the longitudinal pipe is fixedly connected with the reverse airflow cap, and the axial line of the longitudinal pipe coincides with the axial line of the flow guiding chamber.
Through adopting above-mentioned technical scheme, adopt the effective increase gas flow and the velocity of flow of two intake pipes, the small-bore export of cooperation reverse air current cap makes during gaseous ability spouts the more deep space of swirl chamber, and then the whirl of cooperation coating makes the coating atomize more fast.
As a further explanation of the invention, the hydraulic pressure in the feeding cavity is preferably 0.5-10 MPa, and the air pressure in the flow guide pipe is preferably 0.2-0.5 MPa.
By adopting the technical scheme, the coating can realize atomization under lower pressure and can be suitable for coatings with different viscosities; and the gas pressure range can ensure that the momentum of the reverse airflow and the coating momentum are in a proper range, so that the sputtering of the coating is avoided.
As a further explanation of the present invention, it is preferable that the ratio of the total length of the nozzle in the axial direction to the diameter of the discharge port of the swirl chamber is 1.1 to 1.5, the ratio of the diameter of the discharge port of the swirl chamber to the diameter of the inner cavity of the swirl chamber is 0.005 to 0.01, and the ratio of the diameter of the reverse airflow cap to the diameter of the discharge port of the swirl chamber is 0.5 to 0.75.
By adopting the technical scheme, the ratio of the total length of the axial direction of the nozzle to the outer diameter of the discharge hole of the cyclone chamber is set to ensure the proper atomization granularity and flow range of the coating; the proper size of the discharge hole is set to ensure that the coating can be smoothly sprayed out from the nozzle, so that the coating is prevented from being accumulated in the cyclone chamber; and a proper outlet ratio is set, so that the reverse airflow can impact the paint spray from the inner part of the spray cone angle, and the matching of the airflow flow and the paint flow is ensured.
As a further explanation of the present invention, it is preferable that the ratio of the diameter of the transverse pipe to the diameter of the longitudinal pipe is 0.75 to 1.
By adopting the technical scheme, the diameter of the longitudinal pipe orifice is slightly smaller than that of the transverse pipe orifice, so that the airflow is accelerated.
As a further explanation of the present invention, it is preferable that the ratio of the diameter of the longitudinal pipe to the diameter of the reverse airflow cap is 0.8 to 0.9.
By adopting the technical scheme, the speed of the reverse airflow is convenient to control, and meanwhile, the rectification function of the reverse airflow cap is facilitated to be enhanced.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
1. the invention adopts the principle of accelerating atomization by reverse airflow, can realize the atomization of the coating under lower pressure, and increases the safety and reliability of the spraying equipment;
2. the centrifugal rotational flow is adopted to atomize the coating, so that the uniformity of coating atomization is improved, and the spraying quality is improved;
3. the pressure of the reverse airflow can be controlled, so that the spray cone angle can be changed, and the applicability of the nozzle is improved.
Drawings
FIG. 1 is an effect diagram of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
fig. 3 is a cross-sectional view a-a of fig. 2.
In the figure: 1. a feed cavity; 2. a flow guide cavity; 3. a material storage cavity; 4. a swirl chamber; 41. a feed inlet; 5. a flow guide pipe; 51. a transverse tube; 52. a longitudinal tube; 53. a first air inlet; 54. a second air inlet; 6. a reverse airflow cap.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The utility model provides a reverse air current is atomizing centrifugal paint nozzle with higher speed, combines figure 1, figure 2, including feeding chamber 1, water conservancy diversion chamber 2, storage chamber 3, swirl chamber 4, honeycomb duct 5 and reverse air current cap 6, water conservancy diversion chamber 1 links firmly in feeding chamber 2 bottoms, and storage chamber 3 links firmly in water conservancy diversion chamber 2 bottoms, and swirl chamber 4 links firmly in 3 bottom middle parts of storage chamber, and honeycomb duct 5 erects between water conservancy diversion chamber 2 and storage chamber 3, and reverse air current cap 6 erects on honeycomb duct 5.
With reference to fig. 1 and 2, the paint spraying device comprises a feeding cavity 1, a flow guide cavity 2 and a storage cavity 3 which are all integrally formed cylindrical pipe bodies, wherein cylindrical inner cavities are formed in the feeding cavity 1 and the storage cavity 3, the caliber of the storage cavity 3 is larger than that of the feeding cavity 1, a horn-shaped inner cavity is formed in the flow guide cavity 2, the flow guide cavity 2 is communicated with the feeding cavity 1 and the storage cavity 3, and the outer wall of the inner cavity of the flow guide cavity 2 is arc-shaped, so that paint can smoothly flow into the storage cavity 3; referring to fig. 3, the cyclone chamber 4 is an inverted trapezoidal housing, and the bottom of the cyclone chamber is a discharge port, a plurality of spiral feed inlets 41 are axially spaced on the outer wall of the cyclone chamber 4, one end of each feed inlet 41 is communicated with the storage cavity 3, and the other end of each feed inlet 41 is communicated with the cyclone chamber 4; the draft tube 5 comprises a transverse tube 51 and a longitudinal tube 52, the axial direction of the transverse tube 51 is vertical to the axial direction of the diversion chamber 2, the transverse tube 51 penetrates through the joint of the diversion chamber 2 and the storage chamber 3, and two ports of the transverse tube 51 are respectively a first air inlet 53 and a second air inlet 54; one end of the longitudinal pipe 52 is fixedly connected with the transverse pipe 51, the other end of the longitudinal pipe 52 is fixedly connected with the reverse airflow cap 6, and the axis of the longitudinal pipe 52 is superposed with the axis of the flow guide cavity 2; a hole with an inclined upward opening is formed in the reverse airflow cap 6, and an air outlet of the reverse airflow cap 6 extends out of the cyclone chamber 4, so that the coating can be sprayed out of the nozzle, and the atomization efficiency is improved; the draft tube 5 is filled with gas and reversely flows into the cyclone chamber 4 from the reverse airflow cap 6.
With the combination of the drawings 2 and 3, the hydraulic pressure in the feeding cavity 1 is 0.5-10 MPa, and the air pressure in the guide pipe 5 is 0.2-0.5 MPa, so that the coating can be atomized under lower pressure, and the coating can be suitable for coatings with different viscosities; the gas pressure range can ensure that the momentum of the reverse airflow and the coating momentum are in a proper range, so that the sputtering of the coating is avoided; the ratio of the caliber of the feed inlet 41 to the caliber of the inner cavity of the cyclone chamber 4 is 0.001-0.003, the feed inlet 41 is uniformly arranged in the circumferential direction, the coating can be subjected to layered cyclone in the cyclone chamber 4, the atomization uniformity of the coating is promoted, the reasonable caliber ratio ensures that the coating has a certain circumferential speed and smoothly enters the cyclone chamber 4, the ratio of the height of the cyclone chamber 4 to the caliber of the inner cavity of the cyclone chamber 4 is 0.7-0.95, a rotating liquid film can be formed in the cyclone chamber 4, and the coating can be favorably crushed; the ratio of the length of the reverse airflow cap 6 extending out of the cyclone chamber 4 to the diameter of the reverse airflow cap 6 is 0.4-0.6, so that the coating can be prevented from contacting the reverse airflow cap 6, and the maximum effect of reverse airflow accelerated atomization is ensured;
with reference to fig. 2 and 3, the ratio of the total length of the axial direction of the nozzle to the caliber of the discharge hole of the swirl chamber 4 is 1.1-1.5, so as to ensure that the coating has proper atomization granularity and flow range; the volume of the coating is required to ensure that the coating can be smoothly sprayed from the nozzle and cannot be accumulated in the cyclone chamber 4Flow rate of less than or equal to nozzleAnd at the same time,
wherein the content of the first and second substances,
as requiredThe diameter of the outlet 41 of the cyclone chamber 4 can be calculated () And the bore of the inner cavity of the swirl chamber 4) The ratio of the ratio is 0.005 to 0.01.
With reference to fig. 2 and 3, the ratio of the caliber of the transverse pipe 51 to the caliber of the longitudinal pipe 52 is 0.75-1, the caliber of the longitudinal pipe 52 is slightly smaller than the caliber of the transverse pipe 51, so that the airflow is accelerated, the ratio of the caliber of the longitudinal pipe 52 to the caliber of the reverse airflow cap 6 is 0.8-0.9, the speed of the reverse airflow is controlled conveniently, and meanwhile, the rectification function of the reverse airflow cap 6 is enhanced; the ratio of the caliber of the reverse airflow cap 6 to the caliber of the discharge hole 41 of the cyclone chamber 4 is 0.5-0.75, so that the reverse airflow can impact paint spray from the inside of a spray cone angle, and the matching of the airflow and the paint flow is ensured.
Referring to fig. 2 and 3, the coating enters the nozzle through the feeding cavity 1, enters the storage cavity 3 after being rectified by the flow guide cavity 2, and then enters the cyclone chamber 4 through the feeding hole 41 of the cyclone chamber 4 to form a coating cyclone; simultaneously, gas is guided into the diversion pipe 5, reverse airflow is formed under the action of the reverse airflow cap 6, the reverse airflow and the paint rotational flow interact at the nozzle outlet, not only can the atomization of the paint be accelerated, but also the uniformity of the paint atomization can be improved, the effective increase of the gas flow and the flow velocity by adopting two gas inlet pipes are matched with the small-caliber outlet of the reverse airflow cap, so that the gas can be sprayed into a deeper space of the rotational flow chamber, and the paint can be atomized more quickly by matching with the rotational flow of the paint
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention. .

Claims (7)

1. A reverse air flow accelerated atomization centrifugal paint nozzle is characterized in that: the device comprises a feeding cavity (1), a flow guide cavity (2), a storage cavity (3), a cyclone chamber (4), a flow guide pipe (5) and a reverse airflow cap (6), wherein the flow guide cavity (2) is fixedly connected to the bottom of the feeding cavity (1), the storage cavity (3) is fixedly connected to the bottom of the flow guide cavity (2), the cyclone chamber (4) is fixedly connected to the middle of the bottom end of the storage cavity (3), the flow guide pipe (5) is erected between the flow guide cavity (2) and the storage cavity (3), the reverse airflow cap (6) is erected on the flow guide pipe (5), the reverse airflow cap (6) is positioned at a discharge port of the cyclone chamber (4), and gas is introduced into the flow guide pipe (5) and reversely flows into the cyclone chamber (4) from the reverse airflow cap (6);
the draft tube (5) comprises a transverse tube (51) and a longitudinal tube (52), the axis direction of the transverse tube (51) is perpendicular to the axis direction of the draft cavity (2), the transverse tube (51) penetrates through the connection part of the draft cavity (2) and the storage cavity (3), one end of the longitudinal tube (52) is fixedly connected with the transverse tube (51), the other end of the longitudinal tube (52) is fixedly connected with the reverse airflow cap (6), and the axis of the longitudinal tube (52) is overlapped with the axis of the draft cavity (2).
2. A centrifugal paint nozzle for accelerated atomization of reverse air flow in accordance with claim 1 wherein: the air outlet of the reverse airflow cap (6) extends out of the cyclone chamber (4).
3. A centrifugal paint nozzle for accelerated atomization of reverse air flow as set forth in claim 2 wherein: the ratio of the length of the reverse airflow cap (6) extending out of the cyclone chamber (4) to the diameter of the reverse airflow cap (6) is 0.4-0.6.
4. A centrifugal paint nozzle for accelerated atomization of claim 3 in which: spiral feed inlet (41) are formed in the outer wall of the cyclone chamber (4), one end of the feed inlet (41) is communicated with the material storage cavity (3), and the other end of the feed inlet (41) is communicated with the cyclone chamber (4).
5. A centrifugal paint nozzle for accelerated atomization of reverse air flow in accordance with claim 1 wherein: the hydraulic pressure in the feeding cavity (1) is 0.5-10 MPa, and the air pressure in the guide pipe (5) is 0.2-0.5 MPa.
6. A centrifugal paint nozzle for accelerated atomization of reverse air flow in accordance with claim 1 wherein: the ratio of the diameter of the transverse pipe (51) to the diameter of the longitudinal pipe (52) is 0.75 to 1.
7. A centrifugal paint nozzle for accelerated atomization of claim 6 in which: the ratio of the diameter of the longitudinal pipe (52) to the diameter of the reverse airflow cap (6) is 0.8 to 0.9.
CN201911256254.9A 2019-12-10 2019-12-10 Centrifugal paint nozzle for accelerating atomization by reverse airflow Active CN110976120B (en)

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US4526322A (en) * 1982-03-26 1985-07-02 Voorheis Industries, Inc. Flow-reversing nozzle assembly
JPH0753252B2 (en) * 1990-05-15 1995-06-07 本田技研工業株式会社 Rotary atomizing coating device
CN202021105U (en) * 2011-03-31 2011-11-02 江苏宇达电站辅机阀门制造有限公司 Tangential cyclone large-spray angle nozzle
CN203778219U (en) * 2013-11-20 2014-08-20 王超群 High pressure swirl nozzle for mist spray dust removal
CN104676648B (en) * 2015-01-09 2017-02-22 北京航空航天大学 Center fractionation based low-pollution combustor with RQL (rich burn-quench-lean burn) precombustion fraction and LPP (lean premixed prevaporized) main combustion fraction
CN104989332A (en) * 2015-06-17 2015-10-21 成都高普石油工程技术有限公司 Pressure jetting mechanism for down-hole gas production
CN207076573U (en) * 2016-11-30 2018-03-09 福建天广消防有限公司 A kind of pressure type foam spray nozzle

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