JPH028571A - Flow control valve - Google Patents
Flow control valveInfo
- Publication number
- JPH028571A JPH028571A JP15635588A JP15635588A JPH028571A JP H028571 A JPH028571 A JP H028571A JP 15635588 A JP15635588 A JP 15635588A JP 15635588 A JP15635588 A JP 15635588A JP H028571 A JPH028571 A JP H028571A
- Authority
- JP
- Japan
- Prior art keywords
- shape memory
- memory alloys
- piston
- cylinder
- valve body
- 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.)
- Pending
Links
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000012212 insulator Substances 0.000 claims description 5
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
Landscapes
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は多段階に燃料などの流量制御が可能な弁に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a valve capable of controlling the flow rate of fuel or the like in multiple stages.
［従来の技術］
周知の如く、エンジンの燃料供給系をはじめとして、各
種機器類には流体の流量を多段階に制御する弁が具えら
れている。この多段階式の流量制御弁の中には位置制御
を行なう駆動機構にソレノイドを用いたものがある。こ
のソレノイドによる多段位置制御は、電磁コイルに供給
する電流値を変えて磁力を変化させるか、あるいは電磁
コイルを複数段に構成し各段に電流を選択的に供給して
磁力を変化させて中心の作動鉄心に作用する吸引力を調
節することによって行なわれる。[Prior Art] As is well known, various types of equipment, including engine fuel supply systems, are equipped with valves that control the flow rate of fluid in multiple stages. Some of these multi-stage flow control valves use a solenoid as a drive mechanism for position control. This multi-stage position control using a solenoid can be performed by changing the magnetic force by changing the current value supplied to the electromagnetic coil, or by configuring the electromagnetic coil into multiple stages and selectively supplying current to each stage to change the magnetic force. This is done by adjusting the suction force acting on the operating core.
［発明が解決しようとする課題］
しかしながら、ソレノイドによる多段位置例の構成に加
えて、複数個の形状記憶合金の間に御手段は作動鉄心を
中間の位置で高精度でしかも安定よく停止させることが
できないという問題がある。[Problems to be Solved by the Invention] However, in addition to the multi-position configuration using a solenoid, it is also necessary to use a control means between a plurality of shape memory alloys to stop the operating iron core at an intermediate position with high precision and stability. The problem is that it is not possible.
本発明はこのような課題を解決し、各段階で安定よく停
止させることができる高精度の流量制御弁を提供するこ
とを目的として発明されたものである。The present invention was invented with the aim of solving these problems and providing a highly accurate flow control valve that can be stably stopped at each stage.
［課題を解決するための手段］
シリンダと、前記シリンダに嵌装され弁体を結合したピ
ストンと、このピストンに作用させたばねと、前記シリ
ンダに嵌装され前記ばねの付勢方向と逆方向の付勢力を
発生するように変形する複数個の形状記憶合金と、前記
形状記憶合金のそれぞれと対応させて配置した複数個の
電気抵抗発熱体とを具えたこと、およびこれら断熱体を
装入させたことにより前記課題を解決するための手段と
した。[Means for Solving the Problem] A cylinder, a piston fitted in the cylinder and coupled with a valve body, a spring acting on the piston, and a piston fitted in the cylinder and acting in a direction opposite to the biasing direction of the spring. A plurality of shape memory alloys deformed to generate a biasing force, a plurality of electrical resistance heating elements arranged in correspondence with each of the shape memory alloys, and these heat insulators are inserted. This is a means to solve the above problem.
［作 用コ
電気抵抗発熱体によって形状記憶合金の形状を変化させ
ピストンに作用するばねの付勢方向と逆方向の付勢力を
発生させて弁体を駆動するものであり、電気抵抗発熱体
に順次電流を供給あるいは遮断し形状記憶合金の形状を
順次変化させて多段階に弁体の位置制御を行なう。[Operation] The electric resistance heating element changes the shape of the shape memory alloy and generates a biasing force in the opposite direction to the biasing direction of the spring acting on the piston, thereby driving the valve body. The position of the valve body is controlled in multiple stages by sequentially supplying or cutting off current to sequentially change the shape of the shape memory alloy.
［実 施 例］ 本発明の実施例を図面に従って説明する。[Example] Embodiments of the present invention will be described with reference to the drawings.
シリンダ１の内部にピストンロッド２ａを有するピスト
ン２が嵌装され、このピストン２によってシリンダｌの
内部が前室３と後室４とに仕切られているとともに、前
室３を縦断してシリンダ〕の前方へ突出したピストンロ
ッド２ａの先端には弁体５が設けられでいる。そして、
前室３にはピストン２を後室４へ向って移動させる付勢
力となるばね６が装入され、後室４には駆動力発生機構
７が設けられている。A piston 2 having a piston rod 2a is fitted inside the cylinder 1, and the piston 2 partitions the inside of the cylinder 1 into a front chamber 3 and a rear chamber 4. A valve body 5 is provided at the tip of the piston rod 2a that projects forward. and,
A spring 6 serving as an urging force for moving the piston 2 toward the rear chamber 4 is installed in the front chamber 3, and a driving force generating mechanism 7 is provided in the rear chamber 4.
駆動力発生機構７は三個の板状の形状記憶合金８ａ、
８ｂ、 ８ｃと、これらの間に介在させた二個の断熱体
９ａ、 ９ｂと、前記形状記憶合金８ａ、 ８ｂ、 ８
ｃを各別に加熱するＰＴＣからなる三個の電気抵抗発熱
体１０ａ、 １０ｂ、 １０ｃとから構成される。形状
記憶合金８ａ、 ８ｂ、 ８ｃはともに逆変態終了温度
よりも高温度において弧状に変形させて原形状を記憶さ
せ、マルテンサイト変態終了温度よりも低温度において
平板状に加工したものであり、電気抵抗発熱体１０ａ、
１０ｂ、 １０ｃによって加熱されると原形状である
弧状に変形し、ばね６の付勢力と逆方向の付勢力、即ち
ピストン２を前室３側へ移動させる付勢力を発生するも
のである。（第２図参照）。電気抵抗発熱体１０ａ、
１０ｂ、 １０ｃは環状に形成され、三個の形状記憶合
金８ａ、 ８ｂ、 ８ｃを各別に囲んでシリンダ１の内
側局面に埋設されており、これらは電源１１に対して並
列に配置されそれぞれに付設したスイッチ１２ａ、 １
２ｂ、 １２ｃをオンすることにより電流が供給されて
発熱し形状記憶合金８ａ、 ８ｂ、 ８ｃを変形させる
。The driving force generation mechanism 7 includes three plate-shaped shape memory alloys 8a,
8b, 8c, two heat insulators 9a, 9b interposed between them, and the shape memory alloys 8a, 8b, 8
It is composed of three electrical resistance heating elements 10a, 10b, and 10c each made of PTC that heat the heating element c separately. Shape memory alloys 8a, 8b, and 8c are all deformed into an arc shape at a temperature higher than the end temperature of reverse transformation to memorize the original shape, and then processed into a flat plate shape at a temperature lower than the end temperature of martensitic transformation. resistance heating element 10a,
When heated by the pistons 10b and 10c, they deform into their original arcuate shape and generate a biasing force in the opposite direction to the biasing force of the spring 6, that is, a biasing force that moves the piston 2 toward the front chamber 3. (See Figure 2). electrical resistance heating element 10a,
10b and 10c are formed in an annular shape and are buried in the inner surface of the cylinder 1, surrounding the three shape memory alloys 8a, 8b, and 8c, respectively, and are arranged in parallel to the power source 11 and attached to each. switch 12a, 1
By turning on the shape memory alloys 8a, 8b, 8c, a current is supplied to generate heat and deform the shape memory alloys 8a, 8b, 8c.
以上のように構成した本実施例を、通路１３を流れる流
体の流量制御を行なわせる場合について第３図により説
明すると、電気抵抗発熱体１０ａ、 １０ｂ、 １０ｃ
のいずれにも電流が供給されていない状態では三個の形
状記憶合金８ａ、 ８ｂ、 ８ｃはともに平板状となっ
ており、駆動力発生機構７はピストン２に付勢力即ち駆
動力を与えずばね６の作用で通路１３を全開している（
第３図Ｃ参照）。In this embodiment configured as above, the case where the flow rate of the fluid flowing through the passage 13 is controlled will be explained with reference to FIG. 3. Electric resistance heating elements 10a, 10b, 10c
When no current is supplied to any of the three shape memory alloys 8a, 8b, 8c, the three shape memory alloys 8a, 8b, 8c are all in a flat plate shape, and the driving force generating mechanism 7 does not apply an urging force, that is, a driving force to the piston 2. The passage 13 is fully opened by the action of 6 (
(See Figure 3C).
第一のスイッチ１２ａをオンにすると第一の電気抵抗発
熱体１０ａに電流が供給されて第一の形状記憶合金８８
を加熱して弧状に変形させ、その変形量だけピストン２
を前室３側へばね６の荷重に抗して移動させる。これに
より弁体５は通路１３を少し絞る（第３図Ｃ参照）。次
に第二のスイッチ１２ｂもオンにすると第二の形状記憶
合金８ｂが変形し通路１３を更に絞る（第３図Ｃ参照）
。When the first switch 12a is turned on, a current is supplied to the first electrical resistance heating element 10a and the first shape memory alloy 88
is heated to deform it into an arc shape, and the piston 2 is heated by the amount of deformation.
is moved toward the front chamber 3 side against the load of the spring 6. This causes the valve body 5 to slightly narrow the passage 13 (see FIG. 3C). Next, when the second switch 12b is also turned on, the second shape memory alloy 8b deforms and further narrows the passage 13 (see Figure 3C).
.
更に第三のスイッチ１２ｃをオンにすると第三の形状記
憶合金８０も変形し弁体５が通路１３を全閉するのであ
る（第３図り参照）。Further, when the third switch 12c is turned on, the third shape memory alloy 80 is also deformed and the valve body 5 completely closes the passage 13 (see the third diagram).
尚、断熱体９ａ、 ９ｂを介在させないで形状記憶合金
８ａ、 ８ｂ、 ８ｃを互いに隣接させて並べること、
また目的、用途に応じて三個以外の適宜数の形状記憶合
金を使用し、その数と同数の多段位置制御が可能な流量
制御弁とすること、更に常時電気抵抗発熱体１０ａ、
１０ｂ、 １０ｃに通電しておき、順次通電を遮断する
ことによって形状記憶合金８ａ、 ８ｂ、 ８ｃを変形
させて弁体５の位置を制御すること、更にまた前室３に
駆動力発生機構７を設置し後室４にばね６を設置するこ
と、或いは電気抵抗発熱体はニクロム線とすることなど
の設計変更ができる。Note that the shape memory alloys 8a, 8b, and 8c are arranged adjacent to each other without interposing the heat insulators 9a and 9b;
In addition, the flow control valve can be made by using an appropriate number of shape memory alloys other than three according to the purpose and use, and can perform multi-stage position control as many as the number, and further includes a constant electric resistance heating element 10a,
The shape memory alloys 8a, 8b, 8c are deformed by energizing 10b and 10c, and the current is cut off in order to control the position of the valve body 5. Furthermore, the driving force generating mechanism 7 is provided in the front chamber 3. It is possible to make design changes such as installing a spring 6 in the rear chamber 4 or using a nichrome wire as the electrical resistance heating element.
［発明の効果コ
以上のように本発明は、電気抵抗発熱体によって複数個
の形状記憶合金を各別に加熱変形させて多段階に位置制
御するように構成したものであるから、形状記憶合金に
対応させて配置した電気抵抗発熱体へ電流を適宜に供給
あるいは遮断することにより全開、全閉位置はもとより
中間位置においても安定した位置制御が高精度で行なえ
、確実にして安定した性能を有する小形の流量制御弁提
供されるものである。更に形状記憶合金の間に断熱体を
装入した場合は隣接する電気抵抗発熱体による熱的影響
が少なく動作の正確性が向上するものである。[Effects of the Invention] As described above, the present invention is configured to individually heat and deform a plurality of shape memory alloys using electric resistance heating elements and control their positions in multiple stages. By appropriately supplying or cutting off current to electrical resistance heating elements placed in corresponding positions, stable position control can be performed with high precision not only in fully open and fully closed positions, but also in intermediate positions, making this compact product with reliable and stable performance. A flow control valve is provided. Furthermore, when a heat insulating body is inserted between the shape memory alloys, the thermal influence from the adjacent electric resistance heating element is reduced and the accuracy of operation is improved.
第１図は本発明の実施例を示す縦断面図、第２図は形状
記憶合金変形後の断面部分図、第３図Ａ、Ｂ、Ｃ，Ｄは
位置制御の説明図である。
１・・・・・・シリンダ、２・・・・・・ピストン、５
・・・・・・弁体、６・・・・・・ばね、７・・・・・
・駆動力発生機構、８ａ、 ８ｂ、 ８ｃ・・・・・・
形状記憶合金、９ａ、 ９ｂ・・・・・・断熱体、１０
ａ、 １０ｂ、 １０ｃ・・・・・・電気抵抗発熱体第
３図FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, FIG. 2 is a partial cross-sectional view after deformation of the shape memory alloy, and FIG. 3 A, B, C, and D are explanatory diagrams of position control. 1...Cylinder, 2...Piston, 5
... Valve body, 6 ... Spring, 7 ...
・Driving force generation mechanism, 8a, 8b, 8c...
Shape memory alloy, 9a, 9b...Insulator, 10
a, 10b, 10c... Electric resistance heating element Figure 3
Claims (2)
したピストンと、このピストンに作用させたばねと、前
記シリンダに嵌装され前記ばねの付勢方向と逆方向の付
勢力を発生するように変形する複数個の形状記憶合金と
、前記形状記憶合金のそれぞれと対応させて配置した複
数個の電気抵抗発熱体とを具えたことを特徴とする流量
制御弁。(1) A cylinder, a piston fitted in the cylinder and coupled to a valve body, a spring acting on the piston, and a piston fitted in the cylinder to generate a biasing force in a direction opposite to the biasing direction of the spring. 1. A flow control valve comprising: a plurality of shape memory alloys that are deformed into a shape memory alloy; and a plurality of electric resistance heating elements arranged in correspondence with each of the shape memory alloys.
合金の間に断熱体が装入されていることを特徴とする流
量制御弁。(2) A flow control valve characterized in that, in addition to the structure of claim (1), a heat insulator is inserted between a plurality of shape memory alloys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15635588A JPH028571A (en) | 1988-06-24 | 1988-06-24 | Flow control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15635588A JPH028571A (en) | 1988-06-24 | 1988-06-24 | Flow control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH028571A true JPH028571A (en) | 1990-01-12 |
Family
ID=15625942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15635588A Pending JPH028571A (en) | 1988-06-24 | 1988-06-24 | Flow control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH028571A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007036285A1 (en) * | 2005-09-23 | 2007-04-05 | Möhlenhoff Wärmetechnik GmbH | Arrangement for adjusting a valve |
| US9267617B2 (en) | 2010-07-28 | 2016-02-23 | Buerkert Werke Gmbh | Drive unit for a micro valve comprising a shape memory alloy, and micro valve |
-
1988
- 1988-06-24 JP JP15635588A patent/JPH028571A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007036285A1 (en) * | 2005-09-23 | 2007-04-05 | Möhlenhoff Wärmetechnik GmbH | Arrangement for adjusting a valve |
| US8939427B2 (en) | 2005-09-23 | 2015-01-27 | Mohlenhoff Warmetechnik Gmbh | Arrangement for adjusting a valve |
| US9267617B2 (en) | 2010-07-28 | 2016-02-23 | Buerkert Werke Gmbh | Drive unit for a micro valve comprising a shape memory alloy, and micro valve |
| DE102011108223B4 (en) * | 2010-07-28 | 2019-03-28 | Bürkert Werke GmbH | Drive for a shape memory alloy microvalve and microvalve |
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