JPS6246721B2 - - Google Patents
Info
- Publication number
- JPS6246721B2 JPS6246721B2 JP56021839A JP2183981A JPS6246721B2 JP S6246721 B2 JPS6246721 B2 JP S6246721B2 JP 56021839 A JP56021839 A JP 56021839A JP 2183981 A JP2183981 A JP 2183981A JP S6246721 B2 JPS6246721 B2 JP S6246721B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- flapper
- back pressure
- pressure chamber
- displacement
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/42—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using fluid means
- G01D5/44—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using fluid means using jets of fluid
- G01D5/46—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using fluid means using jets of fluid by deflecting or throttling the flow
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、空気式計器などに使用されるノズ
ル・フラツパ装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in nozzle flapper devices used in pneumatic instruments and the like.
この種のノズル・フラツパ装置は、たとえば実
開昭57−63221号公報等に示される記録計を始め
として種々の空気式計器などに用いられている。
This type of nozzle flapper device is used in various pneumatic instruments, including the recorder shown in, for example, Japanese Utility Model Application Publication No. 57-63221.
ところで、この種の空気式計器において、入力
に対する出力の大きさはゲインで表わされる。こ
れをノズル・フラツパ部分に限つて言えば、フラ
ツパ変位に対するノズル背圧の比によつて決定さ
れる。そして、このゲインを高めるために、従来
から、ノズル背圧室に至る供給空気圧Psupの供
給通路途中を仕切る絞り径ｄを、フラツパ側に開
口するノズル径Ｄに比べて小さく（ｄ＜Ｄ）形成
すればよいことが一般に行なわれていた。 Incidentally, in this type of pneumatic instrument, the magnitude of output relative to input is expressed by gain. If we limit this to the nozzle flapper portion, it is determined by the ratio of nozzle back pressure to flapper displacement. In order to increase this gain, conventionally, the diameter d of the aperture that partitions the supply passage for the supply air pressure Psup leading to the nozzle back pressure chamber is made smaller (d<D) than the diameter D of the nozzle that opens on the flapper side. The right thing to do was generally done.
すなわち、上述したノズル・フラツパにおいて
ノズル・フラツパ間隙ｘとノズル背圧室内でのノ
ズル背圧Pnとは第４図に示すような関係にあ
り、その特性曲線ａ，ｂ，ｃのうちｃで示すもの
がノズル・フラツパのゲインが最も高く、しかも
上述したように絞り径ｄをノズル径Ｄに比べて小
さくする程、このｃで示した特性曲線側に近づく
ことが知られている。 That is, in the above-mentioned nozzle flapper, the nozzle flapper gap x and the nozzle back pressure Pn in the nozzle back pressure chamber have a relationship as shown in FIG. It is known that the gain of the nozzle flapper is the highest, and as described above, the smaller the aperture diameter d is compared to the nozzle diameter D, the closer it approaches the characteristic curve shown by c.
しかしながら、上述したようにノズル径Ｄに対
し絞り径ｄを小さくすることは、製作上非常に困
難なもので、より簡単な構成によつて上述したノ
ズル・フラツパにおけるゲインを高めることが可
能となる、何らかの対策を講じることが必要とさ
れている。
However, as mentioned above, it is extremely difficult to make the aperture diameter d smaller than the nozzle diameter D, and it is possible to increase the gain in the nozzle flapper described above with a simpler configuration. , it is necessary to take some measures.
このような要請に応えるために、本発明に係る
ノズル・フラツパ装置は、変位入力により揺動す
るフラツパに対向するノズルを、ノズル背圧室の
フラツパに臨む面を構成するダイヤフラム等によ
る可撓膜上に設けるようにしたものである。
In order to meet such demands, the nozzle flapper device according to the present invention has a nozzle facing a flapper that swings in response to a displacement input, using a flexible membrane such as a diaphragm that constitutes the surface facing the flapper of the nozzle back pressure chamber. It is designed to be placed on top.
〔作用〕
本発明によれば、ノズルが設けられた可撓膜が
フラツパの揺動変位によるノズル背圧室内での圧
力変化に応じて変位することで、前記ノズルをフ
ラツパ変位によるノズル・フラツパ間隙変化を助
長する方向に動作させ得るもので、これにより通
常のノズル背圧にノズルの動作量に応じた付加背
圧が加えられ、その結果ノズル背圧が変化してゲ
インを高めることが可能となるものである。[Function] According to the present invention, the flexible membrane provided with the nozzle is displaced in accordance with the pressure change in the nozzle back pressure chamber due to the rocking displacement of the flapper, so that the nozzle can be moved between the nozzle and the flapper due to the flapper displacement. This allows the nozzle to operate in a direction that promotes the change in nozzle back pressure.This adds additional back pressure to the normal nozzle back pressure according to the amount of nozzle operation, and as a result, the nozzle back pressure changes and it is possible to increase the gain. It is what it is.
以下、本発明を図面に示した実施例を用いて詳
細に説明する。
Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.
第１図は本発明に係るノズル・フラツパ装置の
一実施例を示すものであり、図において、符号１
は図示しない一端が揺動可能に支持されてなるフ
ラツパ、２はこのフラツパ１の先端に対面するノ
ズルで、このノズル２はベース３内に形成された
空間部開口を閉塞するごとく配設された円板状を
なす可撓膜としてのダイヤフラム４の中央に固定
して設けられている。そして、このダイヤフラム
４により画成される内部空間がノズル背圧室５を
構成し、このノズル背圧室５内にはその後端側に
接続された絞りとしてのオリフイス６を有する入
口通路７から常時一定圧の供給空気圧Psupが供
給され、またノズル背圧室５の側方に設けられた
出口通路８からノズル背圧Pnの変化が出力され
るように構成されている。 FIG. 1 shows an embodiment of the nozzle flapper device according to the present invention, and in the figure, reference numeral 1
2 is a flapper whose one end (not shown) is swingably supported; 2 is a nozzle facing the tip of the flapper 1; the nozzle 2 is arranged so as to close a space opening formed in the base 3; It is fixedly provided at the center of a diaphragm 4, which is a disk-shaped flexible membrane. The internal space defined by this diaphragm 4 constitutes a nozzle back pressure chamber 5, and an inlet passage 7 having an orifice 6 as a throttle connected to the rear end side is constantly connected to the nozzle back pressure chamber 5. A constant supply air pressure Psup is supplied, and changes in the nozzle back pressure Pn are output from an outlet passage 8 provided on the side of the nozzle back pressure chamber 5.
そして、このような構成において、基準位置か
ら所定の入力変位ΔＳが与えられることでフラツ
パ１が所要の方向に揺動しノズル２との間の間隙
が変化すると、ノズル２は、ノズル背圧室５内の
圧力変化に応じたダイヤフラム４の変位に伴つて
フラツパ１に対し上述したノズル・フラツパ間隙
変化を助長するポジテイブなフイードバツク方向
に進退動作する。たとえばフラツパ１がノズル２
に接近する方向に揺動しノズル２開口部が絞られ
ると、ノズル背圧室５の内圧すなわちノズル背圧
Pnがその分だけ高まり、その増加分の圧力がダ
イヤフラム４に作用してこれを外方（フラツパ１
側）に膨出するように変位させるもので、その結
果このダイヤフラム４と一体のノズル２の先端
が、フラツパ１側にダイヤフラム４の剛性や噴流
がフラツパ１に及ぼす力等に見合つて平衡する位
置まで、ノズル・フラツパ間隙変化を助長するよ
うに接近して移動する。そして、このようにノズ
ル２とフラツパ１との間隙がさらに狭まること
で、上述したノズル背圧室５内でのノズル背圧
Pnがより一層増大される結果となり、これによ
りゲイン（Pn／ΔＳ）を高めることが可能とな
るものである。 In such a configuration, when a predetermined input displacement ΔS is applied from the reference position, the flapper 1 swings in a required direction and the gap between it and the nozzle 2 changes, and the nozzle 2 moves into the nozzle back pressure chamber. As the diaphragm 4 is displaced in response to changes in pressure within the flap 5, the flapper 1 moves forward and backward in a positive feedback direction that promotes the above-described change in the nozzle-flapper gap. For example, flapper 1 is nozzle 2.
When the nozzle 2 opening is narrowed, the internal pressure in the nozzle back pressure chamber 5, that is, the nozzle back pressure
Pn increases by that amount, and the increased pressure acts on diaphragm 4, pushing it outward (flatter 1
As a result, the tip of the nozzle 2, which is integrated with the diaphragm 4, is placed on the flapper 1 side at a position where it is balanced in proportion to the rigidity of the diaphragm 4 and the force exerted on the flapper 1 by the jet flow. The nozzle and flapper are moved closer to each other to facilitate the change in the nozzle flap gap. By further narrowing the gap between the nozzle 2 and the flapper 1 in this way, the nozzle back pressure in the nozzle back pressure chamber 5 described above increases.
This results in a further increase in Pn, thereby making it possible to increase the gain (Pn/ΔS).
すなわち、フラツパ１に与えられる一定の入力
変位ΔＳに対し、本発明によれば、従来のノズル
背圧よりもノズル２が移動する分に相当する付加
背圧が加わることになり、これによりゲインを高
めることが可能となるものである。これは、第２
図に示すフラツパ１側への入力変位ΔＳのノズル
背圧Pn変化を示す特性図において、符号ｄで示
す本発明による特性曲線が従来の場合を示す特性
曲線ｅとの比較において容易に理解されよう。 In other words, according to the present invention, for a constant input displacement ΔS applied to the flapper 1, an additional back pressure corresponding to the movement of the nozzle 2 is applied compared to the conventional nozzle back pressure, and this increases the gain. It is possible to increase this. This is the second
In the characteristic diagram showing the change in nozzle back pressure Pn with respect to the input displacement ΔS to the flapper 1 side shown in the figure, the characteristic curve according to the present invention indicated by the symbol d can be easily understood by comparing it with the characteristic curve e indicating the conventional case. .
なお、上述した実施例ではノズル２を固定する
ために可撓膜として円板状をなすダイヤフラム４
を用いた場合について説明したが、本発明はこれ
に限定されず、たとえば第３図に示すような膨出
部を有するベローフラム１０を用いてもよい。こ
こで、図中１１はノズル２の内側に螺着されてベ
ローフラム１０の中央にノズル２を固定するため
の固定具、１２はベローフラム１０の外周部をベ
ース３側に固定する押え部材である。 In the above-described embodiment, a disk-shaped diaphragm 4 is used as a flexible membrane to fix the nozzle 2.
Although the present invention is not limited to this, for example, a bellows frame 10 having a bulge as shown in FIG. 3 may be used. Here, in the figure, reference numeral 11 indicates a fixture that is screwed onto the inside of the nozzle 2 to fix the nozzle 2 to the center of the bellows flamm 10, and 12 indicates a holding member that fixes the outer peripheral portion of the bellows flamm 10 to the base 3 side.
以上説明したように、本発明に係るノズル・フ
ラツパ装置によれば、ノズルを可撓膜に固定し、
この可撓膜でノズル背圧室のフラツパに臨む面を
構成するようにしたので、フラツパに与えられる
入力変位によるノズル背圧変化に応じてノズル
を、ノズル・フラツパ間隙変化を助長する方向に
移動変位させ、これによるノズル・フラツパ間隙
変化に相当する付加背圧を、通常のノズル背圧に
加えることができ、従来のような面倒でかつ困難
であつた絞り径をノズル径に対して小さく形成す
る等の手段を講じることなく、簡単かつ確実にゲ
インを高めることができるという優れた効果があ
る。
As explained above, according to the nozzle flapper device according to the present invention, the nozzle is fixed to the flexible membrane,
Since this flexible membrane constitutes the surface of the nozzle back pressure chamber facing the flapper, the nozzle is moved in a direction that promotes changes in the nozzle-flapper gap in response to changes in nozzle back pressure due to input displacement applied to the flapper. By displacing the nozzle, an additional back pressure corresponding to the change in the gap between the nozzle and flapper can be added to the normal nozzle back pressure, and the aperture diameter can be made smaller than the nozzle diameter, which was troublesome and difficult in the past. This has the excellent effect of increasing the gain easily and reliably without having to take any other measures.
第１図は本発明に係るノズル・フラツパ装置の
一実施例を示す概略構成図、第２図はそのフラツ
パ側への入力変位ΔＳのノズル背圧変化Pnの関
係を示す特性図、第３図は本発明の別の実施例を
示す概略構成図、第４図は従来例を説明するため
のノズル・フラツパ間隙ｘに対するノズル背圧変
化Pnの関係を示す特性図である。
１……フラツパ、２……ノズル、４……ダイヤ
フラム、５……ノズル背圧室、６……オリフイ
ス、７……入口通路、８……出力通路、１０……
ベローフラム。
Fig. 1 is a schematic configuration diagram showing an embodiment of the nozzle flapper device according to the present invention, Fig. 2 is a characteristic diagram showing the relationship between input displacement ΔS to the flapper side and nozzle back pressure change Pn, and Fig. 3 4 is a schematic configuration diagram showing another embodiment of the present invention, and FIG. 4 is a characteristic diagram showing the relationship between the nozzle back pressure change Pn and the nozzle flapper gap x to explain the conventional example. 1... Flat flap, 2... Nozzle, 4... Diaphragm, 5... Nozzle back pressure chamber, 6... Orifice, 7... Inlet passage, 8... Output passage, 10...
bellow flam.
Claims (1)
ノズルを、ノズル背圧室のフラツパに臨む面を構
成する可撓膜上に設け、この可撓膜が前記フラツ
パの揺動変位によるノズル背圧室内での圧力変化
に応じて変位することにより、前記ノズルをフラ
ツパ変位によるノズル・フラツパ間隙変化を助長
する方向に動作させるように構成したことを特徴
とするノズル・フラツパ装置。1. A nozzle facing a flapper that swings due to displacement input is provided on a flexible membrane that constitutes a surface facing the flapper of a nozzle back pressure chamber, and this flexible film 1. A nozzle flap device, characterized in that the nozzle is moved in a direction that promotes a change in the nozzle flap gap due to flapper displacement by being displaced in response to a pressure change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2183981A JPS57135314A (en) | 1981-02-17 | 1981-02-17 | Nozzle flapper device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2183981A JPS57135314A (en) | 1981-02-17 | 1981-02-17 | Nozzle flapper device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57135314A JPS57135314A (en) | 1982-08-20 |
| JPS6246721B2 true JPS6246721B2 (en) | 1987-10-05 |
Family
ID=12066243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2183981A Granted JPS57135314A (en) | 1981-02-17 | 1981-02-17 | Nozzle flapper device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57135314A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100799764B1 (en) * | 2007-01-17 | 2008-02-01 | 윤수영 | Boil |
-
1981
- 1981-02-17 JP JP2183981A patent/JPS57135314A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57135314A (en) | 1982-08-20 |
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