JPH0451703B2 - - Google Patents
Info
- Publication number
- JPH0451703B2 JPH0451703B2 JP58213324A JP21332483A JPH0451703B2 JP H0451703 B2 JPH0451703 B2 JP H0451703B2 JP 58213324 A JP58213324 A JP 58213324A JP 21332483 A JP21332483 A JP 21332483A JP H0451703 B2 JPH0451703 B2 JP H0451703B2
- Authority
- JP
- Japan
- Prior art keywords
- tooth
- rod
- electromagnet
- control valve
- teeth
- 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 - Lifetime
Links
- 230000005284 excitation Effects 0.000 claims description 12
- 230000003993 interaction Effects 0.000 claims description 2
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
- F16K31/082—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet using a electromagnet and a permanent magnet
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Description
【発明の詳細な説明】
この発明は電磁比例制御弁に係るもので、更に
詳細には、永久磁石を備えた直流電磁石形リニア
モータを用いた電磁比例制御弁に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic proportional control valve, and more particularly to an electromagnetic proportional control valve using a DC electromagnetic linear motor equipped with a permanent magnet.
電磁比例制御弁は、電気信号の変化に対応し
て、油圧出力量が追従する弁で、一般の制御弁と
ほとんど変らない油圧機構部と直流電磁石とを組
合せたものである。これらの弁に使用される電磁
石は、比例圧力制御弁のように電磁石の負荷が油
圧で、弁の移動距離の小さい場合には、電磁石は
電流と吸引力とが比例すれば充分であるが、比例
流量制御弁のように電磁石の負荷がバネ力で、弁
の移動距離が前者に比べて大きい場合には、電磁
石は電流と吸引力が比例し、更に、電流が一定で
あれば、吸引力は弁の移動距離に無関係に一定で
あることが必要になる。一般に電磁石の吸引力は
電流の２乗に比例し、また距離が大きくなると急
激に減少する。したがつて、従来の電磁比例制御
弁においては、磁気飽和等を利用して電磁石の吸
引力を可及的に電流に比例するように、また均一
な吸引力が得られるように、電磁石の形状を工夫
しているが、比例制御弁に利用できるソレノイド
プランジヤーの移動範囲はかなり狭く充分ではな
い。 An electromagnetic proportional control valve is a valve whose hydraulic output follows changes in an electric signal, and is a combination of a hydraulic mechanism that is almost the same as a general control valve and a DC electromagnet. For the electromagnets used in these valves, when the load on the electromagnet is hydraulic pressure, such as in a proportional pressure control valve, and the valve travel distance is small, it is sufficient that the electromagnet's current and attraction force are proportional. When the load on the electromagnet is a spring force, as in the case of a proportional flow control valve, and the distance the valve moves is larger than the former, the current and attraction force of the electromagnet are proportional, and furthermore, if the current is constant, the attraction force must be constant regardless of the distance traveled by the valve. Generally, the attractive force of an electromagnet is proportional to the square of the current, and decreases rapidly as the distance increases. Therefore, in conventional electromagnetic proportional control valves, the shape of the electromagnet is designed to make the attraction force of the electromagnet as proportional to the current as possible by utilizing magnetic saturation, and to obtain a uniform attraction force. However, the movement range of the solenoid plunger that can be used for proportional control valves is quite narrow and is not sufficient.
この発明は、このような点に鑑みてなされたも
ので、構造が簡単、制御の容易な、精度の高い電
磁比例制御弁を提供することを目的とするもので
ある。即ち、比例制御弁を永久磁石を備えた直流
電磁石形リニアモータによつて作動させることに
より、構造が簡単、制御の容易な、精度の高い電
磁比例制御弁を提供し、この目的を達成したもの
である。 The present invention has been made in view of these points, and an object of the present invention is to provide a highly accurate electromagnetic proportional control valve that has a simple structure, is easy to control, and is easy to control. That is, this object has been achieved by providing a highly accurate electromagnetic proportional control valve that is simple in structure, easy to control, and operated by a direct current electromagnetic linear motor equipped with a permanent magnet. It is.
次に、この発明の実施例について図面によつて
説明する。第１図は、この発明の電磁比例制御弁
１の構造を示す説明図で、公知の比例制御弁３と
円筒状リニアモータ５からなり、リニアモータの
ロツド７の左端は比例制御弁のスプールと連結さ
れ、バネ９によつて左方に弾発されている。リニ
アモータ５は第２図に示すように、１次側は円筒
状の永久磁石PMの左右に円筒状の電磁石EA，
EBが密着して設けられ、電磁石EA，EBの環状
の極歯P1，P2，P3，P4は、それぞれ２次側のロ
ツド７に設けられた状態の歯T1，T2，T3，T4に
対峙している。これらの空隙ｇは１次側に設けら
れた軸受によつて保持されている。極歯P1〜P4
及び歯T1〜T4の歯巾はすべて等しく、この長さ
をａとすると、極歯P1とP2及びP3とP4の内面距
離は共に３ａ、極歯P2とP3の端面距離は２ａ、
２次側ロツド７の歯T1とT2、T2とT3、T3とT4
の間の溝の巾は共に２ａに等しい。 Next, embodiments of the invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram showing the structure of an electromagnetic proportional control valve 1 of the present invention, which is composed of a known proportional control valve 3 and a cylindrical linear motor 5. The left end of the rod 7 of the linear motor is connected to the spool of the proportional control valve. They are connected to each other and are pushed to the left by a spring 9. As shown in Figure 2, the linear motor 5 has cylindrical electromagnets EA on the left and right sides of a cylindrical permanent magnet PM on the primary side.
The annular pole teeth P 1 , P 2 , P 3 , P 4 of the electromagnets EA, EB are provided in close contact with the teeth T 1 , T 2 , P 4 of the electromagnets EA, EB, which are provided on the secondary rod 7, respectively . It is facing T 3 and T 4 . These gaps g are held by bearings provided on the primary side. Pole teeth P 1 ~ P 4
And the tooth widths of teeth T 1 to T 4 are all equal, and if this length is a, then the inner surface distances of pole teeth P 1 and P 2 and P 3 and P 4 are both 3a, and the distance between pole teeth P 2 and P 3 is The end face distance is 2a,
Teeth T 1 and T 2 , T 2 and T 3 , T 3 and T 4 of secondary rod 7
The widths of the grooves between both are equal to 2a.
電磁石EA，EBにはそれぞれ励磁コイルCA，
CBが装着されている。 Electromagnets EA and EB have excitation coils CA and EB, respectively.
CB is installed.
この構成において、電磁石EA，EBが無励磁の
場合には、永久磁石PMによる磁界の方向は矢印
を付した実線と点線で示すようになつているが、
励磁コイルCA，CBにそれぞれ○×，○・方向の電流
を供給すると、電磁石EAには右回りの、電磁石
EBには左回りの磁界が発生し、励磁電流を加減
すると、前記点線で示した磁界は消失し、実線で
示した磁界は更に強められる。したがつて、極歯
P1と歯T1及び極歯P3と歯T3間の吸引力（推力）
は零になる。極歯P2と歯T2間の推力F2及び極歯
P4と歯T4間の推力F4は第３図に示すように歯面
間の相対位置によつて変化する。第２図の位置を
基準として、第３図の０点にあるとすると、この
とき推力F2は最大で、F4は零であるが、ロツド
７が右方向（Ｘ方向）に移動すると推力F2は次
第に減少し、推力F4は反対に増大し、歯巾ａだ
け移動したところで、推力F2は零になり、推力
F4は最大（推力F2の最大値に等しい）になる。
したがつて、ロツド７に働く推力は、推力F2及
び推力F4を加算したもので、ロツドの移動が零
から歯巾ａの範囲では、平坦な曲線Ftのように
なる。この曲線Ftで表はされるロツドの推力は、
励磁電流を下げると電流に大凡比例して減少す
る。 In this configuration, when the electromagnets EA and EB are not energized, the direction of the magnetic field from the permanent magnet PM is shown by a solid line with an arrow and a dotted line.
When currents are supplied to the excitation coils CA and CB in the ○× and ○ directions, respectively, the electromagnet EA has a clockwise direction.
A counterclockwise magnetic field is generated in the EB, and when the excitation current is adjusted, the magnetic field indicated by the dotted line disappears, and the magnetic field indicated by the solid line is further strengthened. Therefore, the polar teeth
Attraction force (thrust) between P 1 and tooth T 1 and between pole tooth P 3 and tooth T 3
becomes zero. Thrust force F 2 between pole tooth P 2 and tooth T 2 and pole tooth
The thrust force F 4 between P 4 and tooth T 4 varies depending on the relative position between the tooth flanks, as shown in FIG. Assuming that the position in Figure 2 is at the 0 point in Figure 3, the thrust F2 is at its maximum and F4 is zero, but when the rod 7 moves to the right (X direction), the thrust increases. F 2 gradually decreases, thrust F 4 increases on the contrary, and when the tooth width a has moved, thrust F 2 becomes zero, and the thrust
F 4 becomes maximum (equal to the maximum value of thrust F 2 ).
Therefore, the thrust acting on the rod 7 is the sum of the thrust F 2 and the thrust F 4 , and when the rod moves in the range from zero to the tooth width a, it becomes like a flat curve Ft. The thrust of the rod expressed by this curve Ft is
When the excitation current is lowered, it decreases roughly in proportion to the current.
一方、ロツド７はバネ９によつて移動量に比例
して左方に引かれるので、バネ力FSと推力Ftのつ
り合つた位置Xpでロツドは停止する。比例制御
弁のスプールは前記のようにロツド７に連結され
ているので、スプールの停止位置はリニアモータ
の励磁電流によつて定まり、その動作範囲は歯巾
ａとなり従来のソレノイド形より大きくすること
ができる。 On the other hand, since the rod 7 is pulled to the left by the spring 9 in proportion to the amount of movement, the rod stops at a position Xp where the spring force F S and the thrust force F t are balanced. Since the spool of the proportional control valve is connected to the rod 7 as described above, the spool's stopping position is determined by the excitation current of the linear motor, and its operating range is the tooth width a, which is larger than the conventional solenoid type. I can do it.
以上のごとき実施例の説明より理解されるよう
に、要するに本発明は、円筒状の永久磁石PMの
両側に励磁コイルCA，CBを備えた円筒状の電磁
石EA，EBをそれぞれ設け、上記永久磁石PMお
よび各電磁石EA，EBの軸心位置に亘つて軸方向
へ移動自在に設けたロツド７を比例制御弁３のス
プールに連結してなり、前記各電磁石EA，EBの
内周面に備えた複数の極歯P1，P2，P3，P4に対
応する複数の歯T1〜T4を前記ロツド７に等間隔
に設け、前記各極歯P1〜P4の歯巾と前記各歯T1
〜T4の歯巾とを共にほぼ等しい寸法ａに形成し、
かつ各電磁石EA，EBの各極歯P1，P2；P3，P4
の内面距離を、前記ロツド７の各歯T1〜T4の間
の溝の巾に前記寸法ａを加算した寸法に形成し、
前記永久磁石PMによる磁界と各電磁石EA，EB
の各励磁コイルCA，CBに励磁電流を供給するこ
とにより発生した磁界との相互作用により前記各
極歯P1〜P4と各歯T1〜T4間の吸引力を制御する
構成としてなるものである。 As can be understood from the description of the embodiments above, in short, the present invention provides cylindrical electromagnets EA and EB each having excitation coils CA and CB on both sides of a cylindrical permanent magnet PM, and A rod 7 is connected to the spool of the proportional control valve 3, and is provided on the inner peripheral surface of the electromagnets EA and EB. A plurality of teeth T 1 to T 4 corresponding to the plurality of pole teeth P 1 , P 2 , P 3 , and P 4 are provided on the rod 7 at equal intervals, and the tooth width of each of the pole teeth P 1 to P 4 and the Each tooth T 1
~ T 4 and the tooth width are both formed to approximately the same dimension a,
And each pole tooth P 1 , P 2 of each electromagnet EA, EB; P 3 , P 4
The inner surface distance is formed by adding the dimension a to the width of the groove between each tooth T 1 to T 4 of the rod 7,
The magnetic field caused by the permanent magnet PM and each electromagnet EA, EB
The structure is such that the attractive force between each of the pole teeth P 1 to P 4 and each of the teeth T 1 to T 4 is controlled by interaction with a magnetic field generated by supplying an excitation current to each of the excitation coils CA and CB. It is something.
上記構成より明らかなように、本発明において
は、永久磁石PMの両側に設けた電磁石EA，EB
の励磁コイルCA，CBに励磁電流を供給すること
により発生した磁界により、永久磁石PMによる
磁界の１部を弱めたり、あるいは強めたりしてロ
ツド７に備えた各歯と電磁石EA，EBの各極歯と
の間の吸引力を制御する構成であり、かつ前記ロ
ツド７を比例制御弁３のスプールに連結してなる
ものである。 As is clear from the above configuration, in the present invention, electromagnets EA and EB are provided on both sides of the permanent magnet PM.
The magnetic field generated by supplying excitation current to the excitation coils CA and CB weakens or strengthens a part of the magnetic field produced by the permanent magnet PM, thereby increasing the strength of each tooth of the rod 7 and each of the electromagnets EA and EB. This structure controls the suction force between the pole teeth and the rod 7 is connected to the spool of the proportional control valve 3.
したがつて本発明によれば、比例制御弁３とロ
ツド７を具備したリニアモータ部分とを別個に製
造して組立てることが可能なものであり、構造簡
単にして制御容易で、かつスプールの位置制御を
高精度に行なうことができるものである。 Therefore, according to the present invention, the proportional control valve 3 and the linear motor section equipped with the rod 7 can be manufactured and assembled separately, and the structure is simple and controllable, and the spool position can be adjusted. Control can be performed with high precision.
添付図面はこの発明の実施例に関するもので、
第１図はこの発明の電磁比例制御弁の説明図、第
２図はリニアモータ部の上半分断面図、第３図は
ロツドの移動量に対するリニアモータの推力及び
バネ力の関係を示す図表である。
１…電磁比例制御弁、３…比例制御弁、５…円
筒状リニアモータ、７…ロツド、９…バネ、PM
…永久磁石、EA，EB…電磁石、CA，CB…励磁
コイル、P1，P2，P3，P4…極歯、T1，T2，T3，
T4…歯、ａ…歯巾の寸法。
The attached drawings relate to embodiments of the invention.
Fig. 1 is an explanatory diagram of the electromagnetic proportional control valve of the present invention, Fig. 2 is a cross-sectional view of the upper half of the linear motor section, and Fig. 3 is a chart showing the relationship between the thrust force and spring force of the linear motor with respect to the amount of movement of the rod. be. 1... Solenoid proportional control valve, 3... Proportional control valve, 5... Cylindrical linear motor, 7... Rod, 9... Spring, PM
...Permanent magnet, EA, EB...Electromagnet, CA, CB...Exciting coil, P 1 , P 2 , P 3 , P 4 ... Pole tooth, T 1 , T 2 , T 3 ,
T 4 ...Tooth, a...Dimensions of tooth width.
Claims (1)
CA，CBを備えた円筒状の電磁石EA，EBをそれ
ぞれ設け、上記永久磁石PMおよび各電磁石EA，
EBの軸心位置に亘つて軸方向へ移動自在に設け
たロツド７を比例制御弁３のスプールに連結して
なり、前記各電磁石EA，EBの内周面に備えた複
数の極歯P1，P2，P3，P4に対応する複数の歯T1
〜T4を前記ロツド７に等間隔に設け、前記各極
歯P1〜P4の歯巾と前記各歯T1〜T4の歯巾とを共
にほぼ等しい寸法ａに形成し、かつ各電磁石EA，
EBの各極歯P1，P2；P3，P4の内面距離を、前記
ロツド７の各歯T1〜T4の間の溝の巾に前記寸法
ａを加算した寸法に形成し、前記永久磁石PMに
よる磁界と各電磁石EA，EBの各励磁コイルCA，
CBに励磁電流を供給することにより発生した磁
界との相互作用により前記各極歯P1〜P4と各歯
T1〜T4間の吸引力を制御する構成としてなるこ
とを特徴とする電磁比例制御弁。1 Excitation coils on both sides of the cylindrical permanent magnet PM
Cylindrical electromagnets EA and EB equipped with CA and CB are provided respectively, and the above permanent magnet PM and each electromagnet EA,
A rod 7 provided movably in the axial direction over the axial center position of EB is connected to the spool of the proportional control valve 3, and a plurality of pole teeth P1 provided on the inner circumferential surface of each of the electromagnets EA and EB. , P 2 , P 3 , P 4 corresponding to multiple teeth T 1
~ T4 are provided on the rod 7 at equal intervals, the tooth width of each of the pole teeth P1 to P4 and the tooth width of each of the teeth T1 to T4 are formed to be approximately the same dimension a, and each Electromagnet EA,
The inner surface distance of each pole tooth P 1 , P 2 ; P 3 , P 4 of the EB is formed to be the width of the groove between each tooth T 1 to T 4 of the rod 7 plus the dimension a, The magnetic field by the permanent magnet PM and each exciting coil CA of each electromagnet EA, EB,
Due to interaction with the magnetic field generated by supplying excitation current to the CB, each of the pole teeth P 1 to P 4 and each tooth
An electromagnetic proportional control valve configured to control the suction force between T1 and T4 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21332483A JPS60109678A (en) | 1983-11-15 | 1983-11-15 | Solenoid proportional control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21332483A JPS60109678A (en) | 1983-11-15 | 1983-11-15 | Solenoid proportional control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60109678A JPS60109678A (en) | 1985-06-15 |
| JPH0451703B2 true JPH0451703B2 (en) | 1992-08-19 |
Family
ID=16637261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21332483A Granted JPS60109678A (en) | 1983-11-15 | 1983-11-15 | Solenoid proportional control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60109678A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2579207B2 (en) * | 1988-12-28 | 1997-02-05 | 株式会社いすゞセラミックス研究所 | Valve stepping drive |
| JP2596459B2 (en) * | 1989-03-30 | 1997-04-02 | 株式会社いすゞセラミックス研究所 | Valve electromagnetic drive |
| JP2011125924A (en) * | 2009-12-21 | 2011-06-30 | Sumitomo Metal Ind Ltd | Method for controlling molten metal surface level of molten steel in mold |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5432824A (en) * | 1977-08-18 | 1979-03-10 | Aisin Seiki | Electric flow control valve device |
-
1983
- 1983-11-15 JP JP21332483A patent/JPS60109678A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5432824A (en) * | 1977-08-18 | 1979-03-10 | Aisin Seiki | Electric flow control valve device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60109678A (en) | 1985-06-15 |
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