JPH0463154A - Pressure atomizing nozzle and atomizing method - Google Patents
Pressure atomizing nozzle and atomizing methodInfo
- Publication number
- JPH0463154A JPH0463154A JP17566390A JP17566390A JPH0463154A JP H0463154 A JPH0463154 A JP H0463154A JP 17566390 A JP17566390 A JP 17566390A JP 17566390 A JP17566390 A JP 17566390A JP H0463154 A JPH0463154 A JP H0463154A
- Authority
- JP
- Japan
- Prior art keywords
- atomization
- scroll chamber
- fluid
- atomized
- diameter
- Prior art date
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title description 3
- 239000007921 spray Substances 0.000 claims abstract description 42
- 239000012530 fluid Substances 0.000 claims abstract description 26
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 238000005507 spraying Methods 0.000 claims description 12
- 238000000889 atomisation Methods 0.000 abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 9
- 239000002245 particle Substances 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 239000003599 detergent Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
- B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
- B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
- B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
- B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
- B05B1/3436—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a plane perpendicular to the outlet axis
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Nozzles (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、圧力噴霧ノズルおよび噴霧方法に関し、特に
高粘性流体の噴霧に好適なノズルおよび噴霧方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pressure spray nozzle and a spraying method, and more particularly to a nozzle and a spraying method suitable for spraying a highly viscous fluid.
丈米り夜生
噴霧造粒法などにおいては、液の微粒子化をよくするた
めに、液に旅回運動を与えて中空円錐状に噴霧すること
が行なわれており、この目的のために渦巻噴射型の加圧
ノズルが用いられている。この圧力噴霧ノズルは、１ま
たは複数の流入口から液を渦巻室に導き、渦巻室内で旋
回流として噴霧口より噴射するものであり、実公昭４０
−２６４６１号公報、同４０−２７１６５号公報、特公
昭４１−１６３４２号公報、実開昭５３−２４５１０号
公報、特公昭５５−３９３７６号公報などに記載されて
いる。In methods such as the rice-dried spray granulation method, in order to improve the atomization of the liquid, the liquid is given a traveling motion and sprayed in a hollow conical shape. An injection type pressurized nozzle is used. This pressure spray nozzle introduces liquid from one or more inlets into a swirl chamber, and injects the liquid from the spray port as a swirling flow within the swirl chamber.
They are described in Japanese Patent Publication No. 26461, Japanese Patent Publication No. 40-27165, Japanese Patent Publication No. 16342-1982, Japanese Utility Model Publication No. 24510-1983, Japanese Patent Publication No. 39376-1987, and the like.
しかしながら、従来の渦巻噴射型加圧ノズルにおいては
、流体の粘性が高くなるほど流量係数は大きく、かつ噴
霧角が狭くなり、微粉化が不十分となることから、高粘
性流体の噴霧には適さなかった。However, with conventional spiral spray pressurized nozzles, the higher the viscosity of the fluid, the larger the flow coefficient, and the narrower the spray angle, resulting in insufficient atomization, making it unsuitable for spraying highly viscous fluids. Ta.
明が解 しようとする課
本発明は、高粘性流体の場合にも大きな噴霧角で噴霧で
き、得られる粒子の微細化が容易な圧力噴霧ノズルおよ
び噴霧方法を提供するものである。DISCLOSURE OF THE INVENTION The present invention provides a pressure spray nozzle and a spraying method that can spray even a highly viscous fluid at a large spray angle and easily miniaturize the resulting particles.
発明の構成
本発明の圧力噴霧ノズルは、渦巻噴射型の加圧ノズルに
おいて、渦巻室内径ｄ１、渦巻室流入口径ｄｏ、噴霧口
径ｄｅが、
（ｄ １−２ｄ ｏ）／ｄ ｅ＝０〜２の範囲にあるこ
とを特徴とする。Structure of the Invention The pressure spray nozzle of the present invention is a spiral injection type pressurized nozzle, and the spiral chamber inner diameter d1, the spiral chamber inlet diameter do, and the spray opening diameter de are (d 1-2d o)/d e = 0 to 2. It is characterized by being in the range of
また、本発明の噴霧方法は、上記の圧力噴霧ノズルを用
いて、粘度がずり速度１０’５ｅｃ−”において０．ｌ
Ｐａ−５以上である流体を噴霧することを特徴とする。Further, in the spraying method of the present invention, the viscosity is 0.1 at a shear rate of 10'5 ec-'' using the above-mentioned pressure spray nozzle.
It is characterized by spraying a fluid having a temperature of Pa-5 or higher.
以下、実施例により本発明をさらに詳細に説明するが、
本発明はこの実施例に限定されるものではない。Hereinafter, the present invention will be explained in more detail with reference to Examples.
The invention is not limited to this example.
実施例
第１図は本発明の圧力噴霧ノズルの先端部を示す縦断面
図であり、第２図はオリフィスの斜視図である。ホルダ
ー１１の先端にはオリフィス２１が取り付けられており
、さらに、オリフィス２１の上面にプレート１３が固定
されている。オリフィス２１の内部には渦巻室２３が形
成されており、渦巻室２３の下面の開口部が噴霧口２７
を形成する。Embodiment FIG. 1 is a longitudinal sectional view showing the tip of the pressure spray nozzle of the present invention, and FIG. 2 is a perspective view of the orifice. An orifice 21 is attached to the tip of the holder 11, and a plate 13 is further fixed to the upper surface of the orifice 21. A swirl chamber 23 is formed inside the orifice 21, and an opening on the lower surface of the swirl chamber 23 is a spray nozzle 27.
form.
また、オリフィス２１の側壁部には断面角形の渦巻室流
入口２５が２つ形成されている。Furthermore, two spiral chamber inlets 25 each having a rectangular cross section are formed in the side wall of the orifice 21 .
加圧されてノズルに供給されてきた液（流体）は、オリ
フィス２１の側壁部に対して突出して固定されたプレー
ト１３をまわり込むようにして、オリフィス２１の側壁
部の外周部に至り、２つの渦巻室流入口２５から渦巻室
２３内に入る。渦巻室流入口２５により、渦巻室２３の
ほぼ接線方向から渦巻室２３内に導かれた液は、渦巻室
２３内を施回し、噴霧口２７から噴霧角αで円錐状に噴
霧され微粒子状となる。The pressurized liquid (fluid) supplied to the nozzle passes around the plate 13 that is fixed and protrudes from the side wall of the orifice 21, reaches the outer periphery of the side wall of the orifice 21, and forms two spirals. It enters the swirl chamber 23 through the chamber inlet 25. The liquid introduced into the swirl chamber 23 from the substantially tangential direction of the swirl chamber 23 by the swirl chamber inlet 25 is circulated within the swirl chamber 23, and is sprayed conically from the spray port 27 at a spray angle α to form fine particles. Become.
加圧ノズルでの微粒子化において、理論的には、高圧で
渦巻室２３に導入された流体は、渦巻室２３内で圧力エ
ネルギーが旅回速度エネルギーへと変化され、噴霧口２
７に至る時に導入時より速い旅回速度をもっており、こ
のため噴霧口２７から円錐状に噴霧されることになる。In atomization using a pressurized nozzle, theoretically, the pressure energy of the fluid introduced into the swirl chamber 23 at high pressure is changed into travel velocity energy within the swirl chamber 23, and the fluid is fed into the spray nozzle 2.
7, the traveling speed is higher than that at the time of introduction, and therefore the spray is sprayed from the spray nozzle 27 in a conical shape.
このことより、圧力エネルギーから旅回速度エネルギー
への変換を有効に行なうには、渦巻室内径は、噴霧口径
よりかなり太き目に設定することが必要であると従来考
えられていた。For this reason, it has been conventionally thought that in order to effectively convert pressure energy into travel velocity energy, it is necessary to set the diameter of the vortex chamber to be considerably larger than the spray aperture diameter.
しかしこの考え方は、低粘性流体に対しては比較的よく
あてはまるが、高粘性流体に対しては適合しない。これ
に対して本発明は、渦巻室内径を極力小さくすることで
、高粘性流体の流量係数が小さくなり、噴霧角が大きく
なることを見い出したものである。However, although this concept applies relatively well to low viscosity fluids, it does not apply to high viscosity fluids. In contrast, the present invention has discovered that by reducing the diameter of the volute chamber as much as possible, the flow coefficient of the highly viscous fluid becomes smaller and the spray angle becomes larger.
具体的には、渦巻室内径をｄｉ、渦巻室流入口径をｄｏ
、噴霧口径をｄｅとしたとき、（ｄ １−２ｄ ｏ）／
ｄ ｅの値が０〜２の範囲にあることが必要であり、好
ましくはＯ−１，５、さらに好ましくは０．５〜１．０
である（第３図参照）、。Specifically, the diameter of the vortex chamber is di, and the inlet diameter of the vortex chamber is do.
, when the spray aperture is de, (d 1-2d o)/
It is necessary that the value of d is in the range of 0 to 2, preferably O-1.5, more preferably 0.5 to 1.0.
(See Figure 3).
この範囲を逸脱すると、高粘性液体を噴霧した場合に、
流量係数が大きくなり、また噴霧角が狭くなることから
、噴霧した流体の微粒子化が困難となる。なお、渦巻室
流入口が角形の場合には、ｄｅは底辺長である。Outside this range, when spraying high viscosity liquid,
Since the flow coefficient becomes large and the spray angle becomes narrow, it becomes difficult to atomize the sprayed fluid. Note that when the swirl chamber inlet is rectangular, de is the base length.
渦巻室内径ｄｉは、噴霧口径ｄｅより大きいことが好ま
しい（ｄｉ≧ｄｅ）。また、渦巻室流入口径ｄｏと噴霧
口径ｄｅとは、その大きさの比がｄ ｏ ／ ｄ ｅ
＝０．４〜２．０の範囲にあることが好ましい。さらに
、渦巻室２１の高さは、渦巻室流入口と一致されるのが
望ましい。The internal diameter di of the swirl chamber is preferably larger than the spray aperture diameter de (di≧de). Furthermore, the size ratio of the swirl chamber inlet diameter do and the spray diameter de is d o / de
= preferably in the range of 0.4 to 2.0. Furthermore, the height of the volute chamber 21 is desirably matched with the volute chamber inlet.
渦巻室流入口２５の形状は、第２図に示したような断面
角形でも、また断面円形でもよい。渦巻室流入口２Ｓの
数は、流体が高粘性になるほど噴霧に偏りを生じるので
、２個以上が好ましい。The shape of the swirl chamber inlet 25 may be square in cross section as shown in FIG. 2, or circular in cross section. The number of swirl chamber inlets 2S is preferably two or more, since the higher the viscosity of the fluid, the more uneven the spray will be.
本発明の圧力噴霧ノズルは、低粘性流体から高粘性流体
まで噴霧できるが、高粘性となっても流量係数が小さく
噴霧角が広いことから、すり速度１０’５ｅｃ−１にお
いて粘度が０．１Ｐａ−５以上の高粘性流体の噴霧に好
適である。The pressure spray nozzle of the present invention can spray from a low viscosity fluid to a high viscosity fluid, but even when the viscosity becomes high, the flow coefficient is small and the spray angle is wide, so the viscosity is 0.1 Pa at a slip rate of 10'5 ec-1. - Suitable for spraying high viscosity fluids of 5 or more.
このような高粘性流体の具体例としては、噴霧乾燥洗剤
の製造に使用される洗剤スラリーがある。A specific example of such a highly viscous fluid is a detergent slurry used in the manufacture of spray-dried detergents.
光１Ｌυ劃釆
本発明によれば、渦巻噴射型の加圧ノズルにおいて、渦
巻室内径、渦巻室流入口径、噴霧口径の大きさを所定の
関係となるように設定することにより、高粘性流体であ
っても小さな流量係数、広い噴霧角で噴霧することがで
き、流体の微粒化が良好である。According to the present invention, in the pressurized nozzle of the spiral injection type, the diameter of the spiral chamber, the diameter of the spiral chamber inlet, and the size of the spray opening are set to have a predetermined relationship. Even if the flow rate coefficient is small, spraying can be performed with a wide spray angle, and the atomization of the fluid is good.
実験例
実験例１
第１図および第２図に示した圧力噴霧ノズルにおいて、
種々の寸法を有するオリフィスを製作した。これらの各
オリフィスを用い、すり速度１０’ｓｅｃ””において
粘度が０．４Ｐａ−８の洗剤スラリーを噴霧し、噴霧角
を測定した。この結果を表−１に示す。Experimental Example Experimental Example 1 In the pressure spray nozzle shown in FIGS. 1 and 2,
Orifices with various dimensions were fabricated. Using each of these orifices, a detergent slurry having a viscosity of 0.4 Pa-8 was sprayed at a rubbing speed of 10'sec'', and the spray angle was measured. The results are shown in Table-1.
ｄｅ：噴霧口径
実験例２
実験例１の実施例２のｄｉにおいて、（ｄｉ−２ｄ ｏ
）／ｄ ｅ＝０〜２の範囲でｄｏおよびｄｅを変えたオ
リフィスを用い、また、比較例２のｄｉにおいて、（ｄ
１−２ｄ ｏ）／ｄ ｅ＞２の範囲でｄｏおよびｄｅ
を変えたオリフィスを用い、ずり速度ｔｏ４ｓｅｃ−１
における種々の粘度の流体を噴霧し、ノズルパラメータ
Δｍと流量係数Ｃとの関係をプロットした。de: Spray aperture Experimental Example 2 In di of Example 2 of Experimental Example 1, (di-2d o
)/d using an orifice with do and de changed in the range of e=0 to 2, and in di of Comparative Example 2, (d
1-2d o)/d do and de in the range e>2
Using orifices with different values, the shear rate to4sec-1
Fluids of various viscosities were sprayed, and the relationship between the nozzle parameter Δm and the flow coefficient C was plotted.
Ｎ：流入口数
ｄＯ′：流入口円相光径
ｄｅニオリフイス径
ｄｊ：渦巻室径
本発明のノズルによれば、流体が高粘性になっても、流
量係数が大きく変化せず、値の小さいことが判る。N: number of inflow ports dO': inlet circular diameter de niorifice diameter dj: swirl chamber diameter According to the nozzle of the present invention, even if the fluid becomes highly viscous, the flow coefficient does not change significantly and has a small value. I understand.
第１図は、本発明の圧力噴霧ノズルの実施例を示す縦断
面図である。
第２図は、オリフィス実施例を示す斜視図である。
第３図は、各部位の寸法を示すオリフィスの平面図であ
る。
第４図は、噴霧流体の粘度による流量係数Ｃの変化を示
すグラフである。FIG. 1 is a longitudinal sectional view showing an embodiment of the pressure spray nozzle of the present invention. FIG. 2 is a perspective view of the orifice embodiment. FIG. 3 is a plan view of the orifice showing the dimensions of each part. FIG. 4 is a graph showing changes in the flow coefficient C depending on the viscosity of the spray fluid.
Claims (1)
、渦巻室流入口径ｄｏ、噴霧口径ｄｅが、 （ｄｉ−２ｄｏ）／ｄｅ＝０〜２ の範囲にあることを特徴とする圧力噴霧ノズル。 ２、渦巻室流入口を２つ以上具えた請求項１記載の圧力
噴霧ノズル。 ３、請求項１または２に記載の圧力噴霧ノズルを用い、
粘度がずり速度１０＾４ｓｅｃ＾−＾１において０．１
Ｐａ・ｓ以上である流体を噴霧することを特徴とする噴
霧方法。[Claims] 1. In a pressurized nozzle of a spiral injection type, the diameter di of the spiral chamber
, a swirl chamber inlet diameter do, and a spray aperture diameter de are in the range of (di-2do)/de=0 to 2. 2. The pressure spray nozzle according to claim 1, comprising two or more swirl chamber inlets. 3. Using the pressure spray nozzle according to claim 1 or 2,
Viscosity is 0.1 at shear rate 10^4sec^-^1
A spraying method characterized by spraying a fluid having a pressure of at least Pa·s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2175663A JP2914522B2 (en) | 1990-07-02 | 1990-07-02 | Pressure spray nozzle and spray method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2175663A JP2914522B2 (en) | 1990-07-02 | 1990-07-02 | Pressure spray nozzle and spray method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0463154A true JPH0463154A (en) | 1992-02-28 |
| JP2914522B2 JP2914522B2 (en) | 1999-07-05 |
Family
ID=16000049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2175663A Expired - Fee Related JP2914522B2 (en) | 1990-07-02 | 1990-07-02 | Pressure spray nozzle and spray method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2914522B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018001103A (en) * | 2016-07-04 | 2018-01-11 | 株式会社デンソー | Injection valve |
| CN111389610A (en) * | 2020-03-18 | 2020-07-10 | 北京科勒有限公司 | Liquid spraying device |
| WO2022091789A1 (en) * | 2020-10-29 | 2022-05-05 | 株式会社日立製作所 | Screw compression chamber internal atomizing device |
-
1990
- 1990-07-02 JP JP2175663A patent/JP2914522B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018001103A (en) * | 2016-07-04 | 2018-01-11 | 株式会社デンソー | Injection valve |
| CN111389610A (en) * | 2020-03-18 | 2020-07-10 | 北京科勒有限公司 | Liquid spraying device |
| WO2022091789A1 (en) * | 2020-10-29 | 2022-05-05 | 株式会社日立製作所 | Screw compression chamber internal atomizing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2914522B2 (en) | 1999-07-05 |
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