JPS60175566A - Spray apparatus - Google Patents

Spray apparatus

Info

Publication number
JPS60175566A
JPS60175566A JP3160984A JP3160984A JPS60175566A JP S60175566 A JPS60175566 A JP S60175566A JP 3160984 A JP3160984 A JP 3160984A JP 3160984 A JP3160984 A JP 3160984A JP S60175566 A JPS60175566 A JP S60175566A
Authority
JP
Japan
Prior art keywords
nozzle
vibrating body
outer periphery
piezoelectric ceramic
nozzle plate
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
Application number
JP3160984A
Other languages
Japanese (ja)
Other versions
JPH0329469B2 (en
Inventor
Naoyoshi Maehara
前原 直芳
Shinichi Nakane
伸一 中根
Kazushi Yamamoto
一志 山本
Takeshi Nagai
彪 長井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3160984A priority Critical patent/JPS60175566A/en
Publication of JPS60175566A publication Critical patent/JPS60175566A/en
Publication of JPH0329469B2 publication Critical patent/JPH0329469B2/ja
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • B05B17/0638Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers spray being produced by discharging the liquid or other fluent material through a plate comprising a plurality of orifices
    • B05B17/0646Vibrating plates, i.e. plates being directly subjected to the vibrations, e.g. having a piezoelectric transducer attached thereto

Landscapes

  • Special Spraying Apparatus (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

PURPOSE:To enhance the vibration efficiency of a vibration and to prevent stress concn., by mounting a nozzle plate and the vibrator in an almost outer periphery support state and allowing a nozzle to face to a pressure chamber. CONSTITUTION:The inner periphery D2 of an adhesive 7 is constituted so as to be almost equal to the outer periphery D1 of piezoelectric ceramic 4 and a vibrator consisting of the piezoelectric ceramic 4 and a nozzle plate 1 is supported by the inner peripheral and of the adhesive layer 7 and the inner peripheral end 14 of a pressure chamber 5. Therefore, the piezoelectric ceramic 4 performs bending vibration efficiently without the outer periphery thereof being fixed and stress concn. in the outer periphery is avoided.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は灯油・軽油などの液体燃料、水、薬液、インク
などの種々の液体を噴射し微粒化するための噴霧装置に
関し、さらに詳しくCえは、加圧室に満たされた液体を
圧電セラミックなどの電気的振動子により加振してノズ
ルから噴射し微粒化するところのいわゆる圧電噴霧装置
に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a spraying device for spraying and atomizing various liquids such as liquid fuels such as kerosene and light oil, water, chemical solutions, and inks. The present invention relates to a so-called piezoelectric spraying device in which a liquid filled in a pressurized chamber is vibrated by an electric vibrator such as a piezoelectric ceramic and then sprayed from a nozzle to atomize the liquid.

従来例の構成とその問題点 従来、この柚の噴霧装置は主としてインクジェット記録
装置に用いられ、特殊処理してその物性を調整したイン
クのみを微粒化する装置として実用化されていたが、前
述したような一般的な液体の噴霧は、いわゆるキャビテ
ーションによる気泡の発生という問題のために、極めて
国難であった。
Structure of the conventional example and its problems In the past, this Yuzu spraying device was mainly used in inkjet recording devices, and was put into practical use only as a device that atomized only ink that had been specially treated to adjust its physical properties. Spraying of such common liquids has been an extremely national problem due to the problem of the generation of bubbles due to so-called cavitation.

また、近年では、このような間mを解決することのでき
る噴霧装置として第1図のような噴霧装置が提案されて
いる。
Furthermore, in recent years, a spraying device as shown in FIG. 1 has been proposed as a spraying device capable of solving such a gap m.

第1図において、ノズル板1は厚さ30pm〜100ノ
+mで中央部に直径30 p m −100fimのノ
ズル2が複数個設けられており、開口3を有する円板状
圧電セラミック4が図のように接着されている。ノズル
板1はさらに加圧室5を有するボディー6に接着層7を
介して接層されており、ノズル板1と圧電セラミック4
より成る振動体が加圧室5の一面ヲ覆うように構成され
ている。
In FIG. 1, a nozzle plate 1 has a thickness of 30 pm to 100 mm and is provided with a plurality of nozzles 2 having a diameter of 30 pm to 100 fim in the center, and a disk-shaped piezoelectric ceramic 4 having an opening 3 is arranged in the center thereof. It is glued like this. The nozzle plate 1 is further attached to a body 6 having a pressurizing chamber 5 via an adhesive layer 7, and the nozzle plate 1 and the piezoelectric ceramic 4
The vibrating body is configured to cover one surface of the pressurizing chamber 5.

加圧室7は、パイプ8によりタンク9に接続され、液体
供給系が設けられている。
The pressurizing chamber 7 is connected to a tank 9 through a pipe 8, and is provided with a liquid supply system.

圧電セラミック4のノズル板1との接It’ h 1 
’ O(!:その対向面11には図示していないμ電極
が設けられており、この両電極間に第2図に示すような
交流電圧が供給される。
Contact of piezoelectric ceramic 4 with nozzle plate 1 It' h 1
'O(!: A μ electrode (not shown) is provided on the opposing surface 11, and an alternating current voltage as shown in FIG. 2 is supplied between these two electrodes.

圧電セラミック4は、この電圧の極性に応じてその直径
方向に伸縮歪を生じるよう分極されていルノテ、ノスル
板1と圧電セラミック4(!l:よす成る振luJ体は
、図中の破線のようなたわみ振動音生じる。従って、ノ
ズル2の近傍が大きく加振されて加圧室5内に圧力波が
生μ、ノズル2からは液滴12が噴射される。
The piezoelectric ceramic 4 is polarized to cause expansion and contraction strain in its diametrical direction depending on the polarity of this voltage. Therefore, the vicinity of the nozzle 2 is greatly vibrated, pressure waves are generated in the pressurizing chamber 5, and droplets 12 are ejected from the nozzle 2.

ノズル2から噴射された液滴12に相当する体積の液体
は、ノズn/2に発生する液体の表面張力によりパイプ
8より自動的に吸い上げられ、自給されるようになって
いる。従って、自給ポンプの作用を果すことができるも
のである。
A volume of liquid corresponding to the droplet 12 ejected from the nozzle 2 is automatically sucked up from the pipe 8 by the surface tension of the liquid generated at the nozzle n/2, and is self-supplied. Therefore, it can function as a self-sufficient pump.

しかしながら、この噴霧装置には以下に述べるような入
点があった。
However, this spray device had some drawbacks as described below.

第4図1alおよび+b+は、第1図の霧化装置の振動
振幅分布図および部分拡大図である。
FIG. 4 1al and +b+ are a vibration amplitude distribution diagram and a partially enlarged view of the atomization device of FIG. 1.

図より明らかなように、接SJi 7の内周r2および
−r2の位置から内側の部分が振動し、その外側は、は
ぼ固定された状態になっている。
As is clear from the figure, the inner part of the contact SJi 7 from the positions r2 and -r2 of the inner periphery vibrates, and the outer part thereof is in a roughly fixed state.

このため圧電セラミック4の外周部(すなわち、r 2
< I r l < r 3)は、振動に寄与すること
ができず、効率の低下をひきおこすと共に、圧電セラミ
ック4の外周部に発生する応力が著しく大きくなり、結
果として、圧電セラミックの信頼性低下を生じる可能性
が大きかった。
Therefore, the outer periphery of the piezoelectric ceramic 4 (i.e. r 2
< I r l < r 3) cannot contribute to vibration, causing a decrease in efficiency, and the stress generated at the outer periphery of the piezoelectric ceramic 4 becomes significantly large, resulting in a decrease in the reliability of the piezoelectric ceramic. There was a high possibility that this would occur.

発明の目的 本発明はこのような従来の入点を一掃した噴霧装置を提
供するものである。
OBJECTS OF THE INVENTION The present invention provides a spray device that eliminates such conventional entry points.

第1の目的は、圧電セラミックの利用効率が高い噴霧装
置を提供するととであり、さらに第2の目的は、極めて
高い信頼性を保証することができる噴霧装置を提供する
ことである。
The first objective is to provide a spraying device that utilizes piezoelectric ceramics with high efficiency, and the second objective is to provide a spraying device that can guarantee extremely high reliability.

発明の構成 本発明は、」ユ記目的を達成するために以下のような構
成により成るものである。
Structure of the Invention The present invention has the following structure in order to achieve the object mentioned above.

すなわち、ノズル板と板状の電気的振動子とより成る振
1υノ体と加圧室ヲ有するボディーとより成り、ノズル
が加圧室に臨むように振動体、をボディーに装置・する
と共に、電気的振動子が周辺支持条件で振動するようボ
ディーに装着する振動体支持部を設けたものであり、こ
の構成により振動体は、周辺支持条件下で効率より、シ
かも高い信頼性を持って動作することができる。
That is, it consists of a vibrating body consisting of a nozzle plate and a plate-shaped electric vibrator, and a body having a pressurizing chamber, and the vibrating body is installed in the body so that the nozzle faces the pressurizing chamber, and A vibrator support section is installed on the body so that the electric vibrator vibrates under peripheral support conditions.With this configuration, the vibrator has higher reliability than efficiency under peripheral support conditions. can work.

実施例の説明 第4図1alは、本発り」の一実施例を示す噴霧装置の
断面図であり、第1図と同符号は相当する構造物である
DESCRIPTION OF THE EMBODIMENT FIG. 4 1al is a cross-sectional view of a spraying device showing an embodiment of this invention, and the same reference numerals as in FIG. 1 indicate corresponding structures.

第4図1alにおいて、接着層7の内周D は、圧電セ
ラミック4の外周り、にほぼ等しいように構成されてい
る。従って、接着層7の内周端13と加圧室5の外壁の
内周端14とにより、圧電セラミック4とノズル板1よ
り成る振動体が支持された状態となっている。すなわち
、振動体は、接着層内周端13と加圧室外壁内周端14
とより成る振動体支持部により支持されているのである
。こ −のため、圧電セラミック4は、外周を固定され
ず、効率良いたわみ振動ヲ行うことができ、しかも、そ
の外周における強い応力集中をさけることができるので
高信頼性を保証することができる。
In FIG. 4 1al, the inner circumference D of the adhesive layer 7 is approximately equal to the outer circumference of the piezoelectric ceramic 4. In FIG. Therefore, the vibrating body consisting of the piezoelectric ceramic 4 and the nozzle plate 1 is supported by the inner circumferential end 13 of the adhesive layer 7 and the inner circumferential end 14 of the outer wall of the pressurizing chamber 5. That is, the vibrating body has an inner peripheral end 13 of the adhesive layer and an inner peripheral end 14 of the outer wall of the pressurizing chamber.
It is supported by a vibrating body support section consisting of. Therefore, the piezoelectric ceramic 4 is not fixed at its outer periphery and can perform flexural vibrations efficiently, and high reliability can be guaranteed because strong stress concentration on the outer periphery can be avoided.

第4図1alは、前述したD2のり、に対する比を変化
させた時、振wJFR幅がどのように変化するかを示し
た実験データである。
FIG. 4 1al shows experimental data showing how the vibration wJFR width changes when the ratio to the above-mentioned D2 ratio is changed.

すなわち、D2/D、=1のときの振幅を1としたとき
、D2/D1の変化に応じて振幅がどのように変化する
かを示したものである。
That is, assuming that the amplitude when D2/D=1 is 1, it shows how the amplitude changes according to a change in D2/D1.

図より明らかなように、D /D =0.85では、2
1 その振幅が著しく減少し、非常に効率が悪くなっている
。したがって、実用的には、図中にAで示す、1 D2/Dに〇、9〜1,0 の聞であることが必袈である。
As is clear from the figure, when D /D = 0.85, 2
1 Its amplitude has decreased significantly, making it very inefficient. Therefore, in practical terms, it is necessary to have a value between 1 D2/D and 0.9 to 1.0, which is indicated by A in the figure.

この条件下においては、はぼ、圧電セラミック4は周辺
支持条件下で動作することができ、極端な応力集中を防
ぐことができるのである。
Under these conditions, the piezoelectric ceramic 4 can operate under peripheral support conditions and extreme stress concentrations can be avoided.

第4図(alの実施例では、D /D #0.95と1 なるように+1+1.成されている。FIG. 4 (In the example of al, D/D #0.95 and 1 So that +1+1. has been completed.

このようなり、全実現するためには、例えば第5図ta
lに示すように接イi1桐料の被着り、Hターン15を
形成しそれ以外の部分は接着されないようにしてもよい
し、同図1b+に示すように接着材料が流出しないよう
に突起16を、投けてもよい。
In order to fully realize this, for example, Fig. 5 ta
As shown in Figure 1b, the H-turn 15 may be formed to form an H-turn 15, and the other parts may not be bonded, as shown in Figure 1b+, or a protrusion may be formed to prevent the adhesive material from flowing out, as shown in Figure 1b+. You may throw 16.

第6図は本発明の他の実施例金示す噴霧装置の断面図で
あり、第1図と同符号は相当する構造物である。
FIG. 6 is a sectional view of a spraying device according to another embodiment of the present invention, and the same reference numerals as in FIG. 1 indicate corresponding structures.

図において圧%セラミック4とノズル板1より成る振動
体は加圧室5の外壁端17と、ゴムなどの弾性体より成
る押付部材1.8とにより支持されるように構成されて
いる。
In the figure, a vibrating body made of a pressurized ceramic 4 and a nozzle plate 1 is supported by an outer wall end 17 of a pressurizing chamber 5 and a pressing member 1.8 made of an elastic material such as rubber.

すなわち、押付金具19は、押付部材18を介して振動
体の外周を外壁端17に押し付けている。
That is, the pressing fitting 19 presses the outer periphery of the vibrating body against the outer wall end 17 via the pressing member 18.

押付部材18は、ゴムなどの振動の伝達されにくい材料
で構成されているので、結果的には、振動体は、外壁端
17によって支持された状態となるのである。したがっ
て、加圧室5の直径を第4図の実施例におけるD2と等
しいように構成すれば、圧電セラミック4と、ノズル板
1より成る振動体を外周支持条件下でボディーに装着す
ることができ、効率が尚くしかも、信頼性の尚い噴霧装
置を実現することができる。
Since the pressing member 18 is made of a material such as rubber that does not easily transmit vibrations, the vibrating body is eventually supported by the outer wall end 17. Therefore, if the diameter of the pressurizing chamber 5 is configured to be equal to D2 in the embodiment of FIG. , it is possible to realize a spraying device that is not only more efficient but also more reliable.

なお、20.21は固定ビス、22は排気パイプである
Note that 20 and 21 are fixing screws, and 22 is an exhaust pipe.

発明の効果 以上のように本発明によれば、ノズIし板と板状の電気
的振動子とより成る振動体をほぼ外周支持条件でボディ
ーに装置”する振動体支持部を設け、ノズルを加圧室に
臨ませるよう構成したので、振動体の振動効率が極めて
高り、シかも応力集中が少ないので高い信頼性を保証す
ることができる噴霧装置全提供するこ6ができる。
Effects of the Invention As described above, according to the present invention, a vibrating body support section is provided to mount a vibrating body consisting of a nozzle plate and a plate-shaped electric vibrator on the body under substantially peripheral support conditions. Since it is configured to face the pressurizing chamber, the vibration efficiency of the vibrating body is extremely high, and there is little stress concentration, so it is possible to provide an entire spraying device that can guarantee high reliability.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来の噴霧装置の断面図、第2図は同噴霧装置
の圧電セラミック駆動電圧波形図、第3噴霧装置のノズ
ル板の接看部梧成図、第6図は本発明の他の実施例を示
す噴霧装置の断面図である。 1 ・・・・・ノズル板、2 ・・・ノズル、3・・・
・・・開口、4・・・・・電気的振動子、5・・・・加
圧室、6・・・・ボデ外壁の内周端、13.14・・・
・・・振動体支持部、17−・・・加圧室外壁端、18
・・・押付部材、17゜18・・・・振動体支持部。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図 2図 第3図 57 第4図 ?? 直fそル D2/I)。 第5図 第 6 凶
Fig. 1 is a sectional view of a conventional spraying device, Fig. 2 is a piezoelectric ceramic drive voltage waveform diagram of the same spraying device, a diagram of the contact portion of the nozzle plate of the third spraying device, and Fig. 6 is a diagram of a conventional spraying device. FIG. 1... Nozzle plate, 2... Nozzle, 3...
... Opening, 4... Electric vibrator, 5... Pressurizing chamber, 6... Inner peripheral end of body outer wall, 13.14...
... Vibrating body support part, 17-... Pressure chamber outer wall end, 18
...Pushing member, 17°18... Vibrating body support part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 57 Figure 4? ? Straightforward D2/I). Figure 5 No. 6

Claims (1)

【特許請求の範囲】 (1) ノズルを有するノズル板と、開口を有する板状
電気的振切子とを、011記ノズルが前記開口に臨むよ
うに相互に装着した振動体と、液体が充填される加圧室
を有するボディーとを備え、前記ノズルが前記加圧室に
臨むよう1j11記振動体を011記ボデイーに装着さ
せると共に、前記電気的振動子がほぼ周辺支持条件で振
切するよう前記振動体を前記ボディーに装着する振動体
支持部を設けた噴霧装置。 (坊 ノズル板の厚さを電気的振動子の厚さより十分小
さくすると共に、+its記ノズル板とボディーとを前
記電気的振動子の外周に沿って接着することにより振動
体支持部を構成した特許請求の範囲第1項記載の噴霧装
置。 (3)振Uノ体の外周を加圧室の内壁端と押付部材上に
より支持する構成とすると共に押付都U”t−ゴムなど
の弾性体で構成した特許請求の範囲第1項記載の噴霧装
置。
[Scope of Claims] (1) A vibrating body in which a nozzle plate having a nozzle and a plate-shaped electric vibrator having an opening are attached to each other so that the nozzle No. 011 faces the opening, and a vibrating body filled with liquid. a body having a pressurizing chamber; the vibrating body 1j11 is attached to the body 011 so that the nozzle faces the pressurizing chamber; A spray device including a vibrating body support section for mounting a vibrating body on the body. (Bo) A patent in which the thickness of the nozzle plate is made sufficiently smaller than the thickness of the electric vibrator, and the vibrating body support part is constructed by bonding the nozzle plate and the body along the outer periphery of the electric vibrator. The spraying device according to claim 1. (3) The outer periphery of the shaking U body is supported by the inner wall end of the pressurizing chamber and the pressing member, and the pressing member is made of an elastic body such as rubber. A spray device according to claim 1 constructed.
JP3160984A 1984-02-22 1984-02-22 Spray apparatus Granted JPS60175566A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3160984A JPS60175566A (en) 1984-02-22 1984-02-22 Spray apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3160984A JPS60175566A (en) 1984-02-22 1984-02-22 Spray apparatus

Publications (2)

Publication Number Publication Date
JPS60175566A true JPS60175566A (en) 1985-09-09
JPH0329469B2 JPH0329469B2 (en) 1991-04-24

Family

ID=12335942

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3160984A Granted JPS60175566A (en) 1984-02-22 1984-02-22 Spray apparatus

Country Status (1)

Country Link
JP (1) JPS60175566A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1386672A1 (en) * 2002-08-02 2004-02-04 PARI GmbH Spezialisten für effektive Inhalation Fluid droplet production apparatus
CN102896061A (en) * 2012-10-15 2013-01-30 哈尔滨工业大学 Piezoelectric micro-jet device based on bending vibration sandwich transducer
WO2019115221A1 (en) * 2017-12-14 2019-06-20 Stamford Devices Limited Mounting of an aerosol generator aperture plate to a support

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1386672A1 (en) * 2002-08-02 2004-02-04 PARI GmbH Spezialisten für effektive Inhalation Fluid droplet production apparatus
WO2004014569A1 (en) * 2002-08-02 2004-02-19 Pari GmbH Spezialisten für effektive Inhalation Fluid droplet production apparatus and method
US7931212B2 (en) 2002-08-02 2011-04-26 Pari Pharma Gmbh Fluid droplet production apparatus and method
US8511581B2 (en) 2002-08-02 2013-08-20 Pari Pharma Gmbh Fluid droplet production apparatus and method
CN102896061A (en) * 2012-10-15 2013-01-30 哈尔滨工业大学 Piezoelectric micro-jet device based on bending vibration sandwich transducer
WO2019115221A1 (en) * 2017-12-14 2019-06-20 Stamford Devices Limited Mounting of an aerosol generator aperture plate to a support
EP3950141A1 (en) * 2017-12-14 2022-02-09 Stamford Devices Limited Mounting of an aerosol generator aperture plate to a support
US11654448B2 (en) 2017-12-14 2023-05-23 Stamford Devices Limited Mounting of an aerosol generator aperture plate to a support

Also Published As

Publication number Publication date
JPH0329469B2 (en) 1991-04-24

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