JPS6229926Y2 - - Google Patents
Info
- Publication number
- JPS6229926Y2 JPS6229926Y2 JP1980101151U JP10115180U JPS6229926Y2 JP S6229926 Y2 JPS6229926 Y2 JP S6229926Y2 JP 1980101151 U JP1980101151 U JP 1980101151U JP 10115180 U JP10115180 U JP 10115180U JP S6229926 Y2 JPS6229926 Y2 JP S6229926Y2
- Authority
- JP
- Japan
- Prior art keywords
- flapper
- displacement
- nozzle
- force
- link
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 20
- 239000000696 magnetic material Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Description
【考案の詳細な説明】
本考案は、ノズル・フラツパ機構を備えた空気
式計器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pneumatic instrument with a nozzle flapper mechanism.
従来この種の空気式計器において、フラツパに
入力変位を与える変位伝達部材としてリンクを用
いた変位平衡式のものは、概略第１図に示す構造
となつている。これを簡単に説明すると、図中符
号１は板状をなすフラツパ、２はその先端側一側
面に常時空気圧を供給するノズルで、前記フラツ
パ１の基部は支軸３により回動自在に支持されて
いる。４はフラツパ１に偏差入力に応じた変位を
与えるリンクで、このリンク４の先端には前記フ
ラツパ１の一側に固設された線材５に当接し変位
力を伝達する伝達ピン６が固定され、またその基
部は一対をなす受圧ベローズ７，８間に挾持固定
された基軸９により回動自在に軸支されている。
そして、前記フラツパ１はばね１０によりリンク
４側に付勢され、その先端の伝達ピン６に常時圧
接されている。 Conventionally, in this type of pneumatic instrument, a displacement-balanced type using a link as a displacement transmission member for applying an input displacement to a flapper has a structure roughly shown in FIG. 1. To explain this simply, reference numeral 1 in the figure is a plate-shaped flapper, 2 is a nozzle that constantly supplies air pressure to one side of the tip side, and the base of the flapper 1 is rotatably supported by a support shaft 3. ing. Reference numeral 4 denotes a link that applies displacement to the flapper 1 according to the deviation input, and a transmission pin 6 is fixed to the tip of this link 4, which contacts a wire 5 fixed to one side of the flapper 1 and transmits a displacement force. , its base is rotatably supported by a base shaft 9 which is clamped and fixed between a pair of pressure-receiving bellows 7 and 8.
The flapper 1 is urged toward the link 4 by a spring 10, and is always pressed against the transmission pin 6 at its tip.
このような構成において、リンク４の途中に設
けられた入力部４ａに偏差入力が作用すると、リ
ンク４は基軸９を中心として回動しその伝達ピン
６によりフラツパ１が支軸３を中心として揺動
し、これによりフラツパ１とノズル２との間の間
隙が変化する。さらに、このフラツパ１の揺動に
よる間隙の変化に対応してノズル背圧が変化し、
この背圧変化はパイロツトバルブ１１により増幅
されて出力として得られるとともに、一方の受圧
ベローズ７に送給され、また絞り１２を介して他
方の受圧ベローズ８にも送給される。 In such a configuration, when a deviation input acts on the input part 4a provided in the middle of the link 4, the link 4 rotates around the base shaft 9, and the flapper 1 swings around the support shaft 3 by the transmission pin 6. This causes the gap between the flapper 1 and the nozzle 2 to change. Furthermore, the nozzle back pressure changes in response to the change in the gap due to the swinging of the flapper 1.
This back pressure change is amplified by the pilot valve 11 and obtained as an output, and is sent to one pressure receiving bellows 7 and also to the other pressure receiving bellows 8 via the throttle 12.
そして、これら一対の受圧ベローズ７，８はそ
の圧力差に応じた変位を発生し、その中央部に固
定された基軸９の位置変化を通じてリンク４にフ
イードバツク変位を与える。 The pair of pressure-receiving bellows 7 and 8 generates a displacement according to the pressure difference, and gives feedback displacement to the link 4 through a change in the position of a base shaft 9 fixed at the center thereof.
ところで、上述した従来の空気式計器では、フ
ラツパ１をリンク４の伝達ピン６に常時圧接する
手段としてばね１０を用いているため、次のよう
な問題を生じている。すなわち、前述した構成に
よれば、リンク４の伝達ピン６には板状フラツパ
１に対して摺動方向の変位と、垂直方向の変位と
が合成されて与えられることとなり、これらの変
位が正確に伝達されるには、フラツパ１自体が軽
量であると同時に、そのフラツパ１との接触面に
おいて摩擦力を極力小さくすることが望まれる。 By the way, in the above-mentioned conventional pneumatic instrument, since the spring 10 is used as a means for constantly pressing the flapper 1 against the transmission pin 6 of the link 4, the following problem occurs. That is, according to the above-mentioned configuration, the transmission pin 6 of the link 4 is given a combined displacement in the sliding direction and a displacement in the vertical direction with respect to the plate-shaped flapper 1, and these displacements are accurately determined. In order to transmit the force, it is desirable that the flapper 1 itself be lightweight, and at the same time, the frictional force at the contact surface with the flapper 1 be minimized as much as possible.
また、フラツパ１を伝達ピン６に常時圧接させ
るには、摺動摩擦力が増大しない範囲での適当な
ばね定数をもつたばね１０を使用しなければなら
ない。 Further, in order to keep the flapper 1 in pressure contact with the transmission pin 6 at all times, it is necessary to use a spring 10 having an appropriate spring constant within a range that does not increase the sliding friction force.
従来は、第１図に示すように、板状フラツパ１
の一側面に線材５を固着し、これをリンク４先端
の伝達ピン６と交差させ、これにより両者の丸味
を利用して点接触させるようにしているが、この
場合にはフラツパ１の重量が大きくなり、その動
作上好ましくない。 Conventionally, as shown in FIG.
A wire rod 5 is fixed to one side and intersects with the transmission pin 6 at the tip of the link 4, thereby making point contact by utilizing the roundness of the two. In this case, the weight of the flapper 1 is It becomes large, which is not desirable for its operation.
また、ばね１０は、第２図から明らかなよう
に、フラツパ１をノズル２の閉止方向に付勢して
いるが、フラツパ１の揺動位置によつて引張力が
変化するもので、これにより伝達ピン６への圧接
力は、第３図に示すように、常時一定とはならな
い。すなわち、フラツパ１とノズル２との間隙xf
が増加すると、圧接力ＦはFmin→Fmaxまで変
化する。 Further, as is clear from FIG. 2, the spring 10 biases the flapper 1 in the direction of closing the nozzle 2, but its tensile force changes depending on the swinging position of the flapper 1. As shown in FIG. 3, the pressure applied to the transmission pin 6 is not always constant. In other words, the gap xf between flapper 1 and nozzle 2
When increases, the contact force F changes from Fmin to Fmax.
特に、上述した圧接力Ｆの変化は、この種の空
気式計器において、伝達棒６はリンク１を介して
指針（図示せず）に連結されていることが多いた
めに、指針に及ぼす影響が大きく、これにより入
力の大きさに応じた測定値が正しく指示されず、
PV指示誤差の原因になつていた。 In particular, in this type of pneumatic instrument, the transmission rod 6 is often connected to the pointer (not shown) via the link 1, so the change in the pressure force F mentioned above has no effect on the pointer. This causes the measurement value to be incorrectly indicated depending on the magnitude of the input,
This was causing PV indication errors.
本考案はこのような事情に鑑み、ノズル・フラ
ツパ機構に変位を与える変位伝達部材に対するフ
ラツパの圧接力を永久磁石を利用して行なうとい
う簡単な構成によつて、指示精度がよく、しかも
摺動摩擦力も小さく、高精度、高信頼性の空気式
計器を提供するものである。 In view of these circumstances, the present invention has a simple configuration in which a permanent magnet is used to apply the pressing force of the flapper against the displacement transmission member that gives displacement to the nozzle flapper mechanism, which provides good indication accuracy and reduces sliding friction. This provides a pneumatic instrument with low force, high precision, and high reliability.
以下、本考案を図面に示した実施例を用いて説
明する。 Hereinafter, the present invention will be explained using embodiments shown in the drawings.
第４図は本考案に係る空気式計器の一実施例を
示し、同図において、第１図と同一部分あるいは
相当する部分には同一番号を附してその説明は省
略する。 FIG. 4 shows an embodiment of the pneumatic meter according to the present invention. In the figure, the same or corresponding parts as those in FIG. 1 are given the same numbers and the explanation thereof will be omitted.
さて、本考案によれば、磁性材からなる板状フ
ラツパ１の先端部にフラツパ１の揺動方向に平行
する面を有する折曲片１ａを設け、この折曲片１
ａに所定の間隙を隔てて永久磁石２０を配設して
おり、この永久磁石２０の力を利用してフラツパ
１をリンク４の伝達棒６に常時圧接させるように
構成している。 Now, according to the present invention, a bent piece 1a having a surface parallel to the swinging direction of the flapper 1 is provided at the tip end of the plate-shaped flapper 1 made of a magnetic material, and this bent piece 1
A permanent magnet 20 is disposed at a predetermined gap at a distance, and the flapper 1 is always pressed against the transmission rod 6 of the link 4 by utilizing the force of the permanent magnet 20.
このようにすれば、ノズル２から噴射されるジ
エツト空気圧により、フラツパ１が受けるモーメ
ントの大きさに対応した反モーメントを、フラツ
パ１に与えることが可能となり、これによりリン
ク４の伝達棒６には、第６図に示すように、フラ
ツパ１とノズル２との間隙xfの変化にかかわら
ず、フラツパ１から及ぼされる圧接力Ｆは、常に
一定の力Fminしか加わらないことになる。そし
て、その結果、入力変位に変化があつても、リン
ク４を介して連結された指針には何ら悪影響を与
えず、高い指示精度が得られるものである。 In this way, the jet air pressure injected from the nozzle 2 makes it possible to apply a reaction moment to the flapper 1 corresponding to the magnitude of the moment that the flapper 1 receives, and thereby the transmission rod 6 of the link 4 As shown in FIG. 6, regardless of the change in the gap xf between the flapper 1 and the nozzle 2, the pressing force F exerted by the flapper 1 is always only a constant force Fmin. As a result, even if there is a change in the input displacement, there is no adverse effect on the hands connected via the link 4, and high pointing accuracy can be obtained.
すなわち、フラツパ１の折曲片１ａでの永久磁
石２０による吸引有効面積が入力変位によるフラ
ツパ１の揺動と共に変化するので、フラツパ１と
ノズル２の間隙が小さい場合は、ノズル２から噴
射されるジエツト空気圧の力が大きくなり、フラ
ツパ１を突き離す方向に大きなモーメントが加わ
るが、吸引有効面積が大きいので、この吸引力に
よる反モーメントと平衡する。また、フラツパ１
とノズル２の間隙が大きくなると、ジエツト空気
圧の力が弱くなるが、吸引有効面積も小さくな
り、平衡する。したがつて、伝達棒６に加わるフ
ラツパ１からの圧接力Ｆを、入力変化とは無関係
に一定とすることができ、しかも最小の圧接力
Fminを実現できるものである。 That is, since the effective area of attraction by the permanent magnet 20 on the bent piece 1a of the flapper 1 changes with the swinging of the flapper 1 due to the input displacement, if the gap between the flapper 1 and the nozzle 2 is small, the liquid is injected from the nozzle 2. The force of the jet air pressure increases and a large moment is applied in the direction of pushing the flapper 1 apart, but since the effective suction area is large, it balances out the reaction moment due to this suction force. Also, Fratupa 1
When the gap between the nozzle 2 and the nozzle 2 becomes larger, the force of the jet air pressure becomes weaker, but the effective suction area also becomes smaller and becomes balanced. Therefore, the pressing force F from the flapper 1 applied to the transmission rod 6 can be kept constant regardless of input changes, and moreover, the pressing force F can be kept constant regardless of input changes.
It is possible to realize Fmin.
よつて、ノズル２のジエツト空気圧の力による
モーメントＭZの変化に等しい磁石吸引力による
反モーメントＭMを、永久磁石２０と折曲片１ａ
により設定すれば、入力変化の大きさに無関係
に、常にＭZ＝ＭMが成立し、リンク４に接続して
いる指針には何らの力の変化を及ぼさないもので
ある。 Therefore, the reaction moment M M due to the magnetic attraction force, which is equal to the change in the moment M Z due to the jet air pressure force of the nozzle 2, is changed between the permanent magnet 20 and the bent piece 1a.
If set as follows, M Z =M M always holds regardless of the magnitude of the input change, and no change in force is exerted on the pointer connected to the link 4.
以上説明したように、本考案に係る空気式計器
によれば、ノズル・フラツパ機構に変位を与える
変位伝達部材への圧接力を永久磁石を利用して作
用させるようにしたので、以下に列記する種々の
効果を奏する。 As explained above, according to the pneumatic instrument according to the present invention, a permanent magnet is used to apply pressure contact force to the displacement transmitting member that displaces the nozzle flapper mechanism. It has various effects.
(1) ばねを使用しないので、ばね反力に起因する
指示誤差が生じない。(1) Since no spring is used, there is no indication error caused by spring reaction force.
(2) 摺動摩擦力が低減できるので、入力―出力精
度の向上と、高寿命、高信頼性の空気式計器を
実現できる。(2) Since sliding friction force can be reduced, input-output accuracy can be improved, and pneumatic instruments with long life and high reliability can be realized.
(3) フラツパの質量を従来に比べて低減でき、し
かもばねを使用しないので、共振点を持たない
ノズル・フラツパ機構を実現できる。(3) The mass of the flapper can be reduced compared to the conventional one, and since no spring is used, a nozzle flapper mechanism that does not have a resonance point can be realized.
(4) ばねを使用しないため、温度変化による出力
変動を軽減できる。(4) Since no spring is used, output fluctuations due to temperature changes can be reduced.
第１図ないし第３図は従来の空気式計器を示
し、第１図は全体の概略構成を示す斜視図、第２
図はその動作説明図、第３図はノズルとフラツパ
との間隙ｘf−変位伝達部材への圧接力Ｆの関係
を示すグラフ、第４図ないし第６図は本考案に係
る空気式計器の一実施例を示し、第４図は概略構
成斜視図、第５図は動作説明図、第６図はノズル
とフラツパの間隙ｘf−変位伝達部材への圧接力
Ｆの関係を示すグラフである。
１……フラツパ、１ａ……折曲片、２……ノズ
ル、４……リンク、６……伝達ピン、７，８……
受圧ベローズ、９……基軸、２０……永久磁石。
Figures 1 to 3 show conventional pneumatic meters, with Figure 1 being a perspective view showing the overall configuration, and Figure 2 being
The figure is an explanatory diagram of its operation, Figure 3 is a graph showing the relationship between the gap x f between the nozzle and the flapper and the pressing force F on the displacement transmitting member, and Figures 4 to 6 are of the pneumatic meter according to the present invention. One embodiment is shown, FIG. 4 is a schematic perspective view of the configuration, FIG. 5 is an explanatory view of the operation, and FIG. 6 is a graph showing the relationship between the gap x f between the nozzle and the flapper and the pressing force F on the displacement transmitting member. . 1... Flat flap, 1a... Bent piece, 2... Nozzle, 4... Link, 6... Transmission pin, 7, 8...
Pressure-receiving bellows, 9...base shaft, 20...permanent magnet.
Claims (1)
ラツパと、このフラツパに当接してノズルとの間
隙に変位を与える変位伝達部材とを備えた空気式
計器において、前記フラツパを前記変位伝達部材
側に常時圧接させる圧接力を与える永久磁石を備
え、この永久磁石は、前記フラツパの磁性材から
なる部分であつてその揺動方向に平行する面に対
し、フラツパの揺動変位に応じて吸引有効面積が
変化するように対向して設けられていることを特
徴とする空気式計器。 In a pneumatic instrument comprising a swingable plate flap that receives air pressure from a nozzle, and a displacement transmitting member that contacts the flapper and applies displacement to a gap between the flap and the nozzle, the flapper is placed on the side of the displacement transmitting member. It is equipped with a permanent magnet that provides a pressing force that causes constant pressure contact, and this permanent magnet has a suction effective area that is proportional to the swinging displacement of the flapper with respect to a surface that is made of a magnetic material of the flapper and is parallel to the swinging direction of the flapper. A pneumatic instrument characterized by being provided facing each other so as to vary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980101151U JPS6229926Y2 (en) | 1980-07-17 | 1980-07-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980101151U JPS6229926Y2 (en) | 1980-07-17 | 1980-07-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5724510U JPS5724510U (en) | 1982-02-08 |
| JPS6229926Y2 true JPS6229926Y2 (en) | 1987-08-01 |
Family
ID=29462655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980101151U Expired JPS6229926Y2 (en) | 1980-07-17 | 1980-07-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6229926Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328388B2 (en) * | 1976-03-17 | 1978-08-14 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5825124Y2 (en) * | 1976-08-18 | 1983-05-30 | 株式会社トキメック | Electromagnetic nozzle flapper |
-
1980
- 1980-07-17 JP JP1980101151U patent/JPS6229926Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328388B2 (en) * | 1976-03-17 | 1978-08-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5724510U (en) | 1982-02-08 |
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