JPH0635757U - Silent solenoid valve - Google Patents
Silent solenoid valveInfo
- Publication number
- JPH0635757U JPH0635757U JP7902092U JP7902092U JPH0635757U JP H0635757 U JPH0635757 U JP H0635757U JP 7902092 U JP7902092 U JP 7902092U JP 7902092 U JP7902092 U JP 7902092U JP H0635757 U JPH0635757 U JP H0635757U
- Authority
- JP
- Japan
- Prior art keywords
- plunger
- valve
- force
- spring
- line
- 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
Landscapes
- Magnetically Actuated Valves (AREA)
Abstract
(57)【要約】
【目的】 従来、電磁石により常磁性体を吸引すること
によって開閉動作する方式の電磁弁においては、開弁あ
るいは閉弁する際に、弁体が電磁石に吸着されたり弁座
に着座するときの衝突音が発生していた。本考案におい
ては、弁本体の構造と電磁石への通電方法を改良するこ
とによって衝突音の発生を防止した。
【構成】 本考案の無音電磁弁は、固定吸引子２とプラ
ンジャ８間に、弁体７を弁座３に向けて付勢するばね９
を設けた電磁弁において、固定吸引子２とプランジャ８
の吸引部を相互に合致する円錐台形に形成するととも
に、固定吸引子２とプランジャ８との間には非磁性の緩
衝部材１１を介在させて、固定吸引子２とプランジャ８
との直接接触を防止し、弁本体６とプランジャ８との間
に前記ばね９より弱い第２のばね１９を設け、さらにコ
イル１０に通電する電流を徐変することによりプランジ
ャ８を徐動させるように構成したものである。
(57) [Abstract] [Purpose] Conventionally, in a solenoid valve of a type that opens and closes by attracting a paramagnetic substance by an electromagnet, when the valve is opened or closed, the valve is attracted to the electromagnet or the valve seat. There was a collision noise when seated on. In the present invention, the collision noise is prevented by improving the structure of the valve body and the method of energizing the electromagnet. According to the silent solenoid valve of the present invention, a spring 9 for biasing a valve body 7 toward a valve seat 3 is provided between a fixed suction element 2 and a plunger 8.
In the solenoid valve provided with the fixed suction element 2 and the plunger 8
Of the fixed suction element 2 and the plunger 8 with a non-magnetic buffer member 11 interposed between the fixed suction element 2 and the plunger 8.
A second spring 19 weaker than the spring 9 is provided between the valve body 6 and the plunger 8 to prevent direct contact with the valve body 6 and to gradually move the current applied to the coil 10 to gradually move the plunger 8. It is configured as follows.
Description
【０００１】[0001]
本考案は、弁の動作が緩動する電磁弁に関するものである。 The present invention relates to a solenoid valve in which the operation of the valve is slow.
【０００２】[0002]
従来の、この種の電磁弁を図９により簡単に説明する。非磁性材の円筒１の上 端部には常磁性材よりなる固定吸引子２が取付けられ、下端部には弁座３，一次 口４，二次口５が形成された弁本体６が取付けられている。円筒１内には下端に 弁体７を形成した常磁性体のプランジャ８が摺動自在に保持されている。また、 固定吸引子２とプランジャ８との間には、プランジャ８の下端に形成した弁体７ を弁座３に向けて付勢するばね９が取付けられている。円筒１の外周にはプラン ジャ８を固定吸引子２に吸引作動させるコイル１０が取付けられている。 A conventional solenoid valve of this type will be briefly described with reference to FIG. A fixed attractor 2 made of paramagnetic material is attached to the upper end of the non-magnetic cylinder 1, and a valve body 6 having a valve seat 3, a primary port 4 and a secondary port 5 is attached to the lower end. Has been. A paramagnetic plunger 8 having a valve body 7 formed at its lower end is slidably held in the cylinder 1. A spring 9 is attached between the fixed suction element 2 and the plunger 8 to urge the valve body 7 formed at the lower end of the plunger 8 toward the valve seat 3. A coil 10 is attached to the outer periphery of the cylinder 1 to cause the fixed suction element 2 to suck the plunger 8.
【０００３】 図１０は、前記電磁弁を駆動する回路で、リレー接点１３によりコイル１０へ の通電がＯＮ／ＯＦＦ制御される。 この構成からなる電磁弁において、リレー接点１３を閉接しコイル１０へ通電 するとプランジャ８が勢いよく固定吸引子２に吸着され、弁が瞬時に全開する。 リレー接点１３を開放するとコイル１０への通電が停止し、プランジャ８はばね ９に押圧され弁体７が瞬時に弁座３を閉塞し弁を閉じる。FIG. 10 is a circuit for driving the solenoid valve, in which the relay contact 13 controls ON / OFF of energization of the coil 10. In the solenoid valve having this configuration, when the relay contact 13 is closed and the coil 10 is energized, the plunger 8 is vigorously attracted to the fixed suction element 2 and the valve is instantly fully opened. When the relay contact 13 is opened, the coil 10 is de-energized and the plunger 8 is pressed by the spring 9 so that the valve body 7 instantly closes the valve seat 3 and closes the valve.
【０００４】[0004]
前記従来電磁弁の開弁および閉弁時の力の作動概念は、図１１に示すように（ 簡素化のため摩擦力は省略する）なる。 線Ａ＝ばね９による閉弁力 線Ｐ＝一次口と二次口との流体圧力差による閉弁力 線Ｂ＝ばね力（線Ａ）＋流体圧力差（線Ｐ）による閉弁力 線Ｃ＝コイル１０により付勢された電磁力による開弁力 （線Ｃ−線Ｂ）＝開弁加速力 The concept of actuation of force when the conventional solenoid valve is opened and closed is as shown in FIG. 11 (friction force is omitted for simplification). Line A = valve closing force due to spring 9 Line P = valve closing force due to the fluid pressure difference between the primary and secondary ports Line B = spring force (line A) + valve closing force due to the fluid pressure difference (line P) Line C = Valve opening force due to the electromagnetic force urged by the coil 10 (line C-line B) = valve opening acceleration force
【０００５】 ここで、リレー接点１３を閉接しコイル１０に通電を開始すると、プランジャ ８には閉弁力（線Ｂ）より大きな開弁力（線Ｃ）が固定吸引子２側から作用し、 プランジャー８は固定吸引子２側に引き寄せられ開弁する。 このときの固定吸引子２から作用する開弁力（線Ｃ）は、固定吸引子２に接近す るほど急激に大きくなり、プランジャ８は固定吸引子２に大きな加速力で衝突し 、大きな吸着音が発生していた。次にリレー接点１３を開放し、コイル１０への 通電を停止すると、開弁力（Ｃ）が瞬時に消え、プランジャー８にはばね９の反 発力だけが残り、プランジャ８は弁本体６側に押され、弁体７と弁座３が衝突し て大きな着座音が発生していた。 また、急激な開弁や閉弁に起因して、一次口４と二次口５の流体の圧力差が大 きいとき、流体が一気に流出あるいは遮断されると不快な流体衝撃音が発生する 問題があった。When the relay contact 13 is closed and the coil 10 is energized, a valve opening force (line C) larger than the valve closing force (line B) acts on the plunger 8 from the fixed suction element 2 side. The plunger 8 is pulled toward the fixed suction element 2 side to open the valve. At this time, the valve opening force (line C) acting from the fixed suction member 2 increases rapidly as it approaches the fixed suction member 2, and the plunger 8 collides with the fixed suction member 2 with a large acceleration force, and a large suction force is exerted. There was a sound. Next, when the relay contact 13 is opened and the coil 10 is de-energized, the valve opening force (C) disappears instantly, only the repulsive force of the spring 9 remains in the plunger 8, and the plunger 8 becomes It was pushed to the side, the valve body 7 and the valve seat 3 collided, and a large seating noise was generated. Also, due to the sudden opening and closing of the valve, when the pressure difference between the fluids at the primary and secondary ports 4 and 5 is large, an unpleasant fluid impact sound is generated when the fluid suddenly flows out or is shut off. was there.
【０００６】[0006]
図１に示すように、非磁性材の円筒１の上端部に常磁性材よりなる固定吸引子 ２を取付け、該円筒１の下端部には弁座３，一次口４，二次口５を形成した弁本 体６を取付け、該円筒１の内部には下端に弁体７を形成した常磁性体のプランジ ャ８を摺動自在に保持し、前記固定吸引子２とプランジャ８との間には、プラン ジャ８の下端に形成した弁体７を弁座３に向けて付勢するばね９を設け、該円筒 １の外周にコイル１０を配置した電磁弁において、固定吸引子２とプランジャ８ の吸引部を相互に合致する円錐台形に形成するとともに、固定吸引子２とプラン ジャ８との間には非磁性の緩衝部材１１を介在させて、固定吸引子２とプランジ ャ８との直接接触を防止し、弁本体６とプランジャ８との間に前記ばね９より弱 い第２のばね１９を設け、さらにコイル１０に通電する電流を徐変することによ りプランジャ８を徐動させるように構成する。 As shown in FIG. 1, a fixed suction element 2 made of paramagnetic material is attached to the upper end of a cylinder 1 made of non-magnetic material, and a valve seat 3, a primary port 4 and a secondary port 5 are attached to the lower end of the cylinder 1. The formed valve body 6 is attached, and a paramagnetic plunger 8 having a valve body 7 formed at the lower end is slidably held in the inside of the cylinder 1, and is interposed between the fixed suction element 2 and the plunger 8. Is provided with a spring 9 for urging the valve body 7 formed at the lower end of the plunger 8 toward the valve seat 3, and in the solenoid valve in which the coil 10 is arranged on the outer circumference of the cylinder 1, the fixed suction element 2 and the plunger are provided. 8 is formed into a conical trapezoidal shape that matches with each other, and a non-magnetic buffer member 11 is interposed between the fixed suction element 2 and the plunger 8 so that the fixed suction element 2 and the plunger 8 are separated from each other. A second spring 1 which prevents direct contact and is weaker than the spring 9 between the valve body 6 and the plunger 8. The provided further configured to Jodo plunger 8 Ri by the current to gradually change for energizing the coil 10.
【０００７】[0007]
本考案の実施例を図１および図２により説明する。 本考案による無音電磁弁の構造例は、図１に示すように、非磁性材の円筒１の 上端部に、常磁性材よりなる固定吸引子２が取付けられ、該円筒１の下端部には 弁座３，一次口４，二次口５を形成した弁本体６が取付けられている。円筒１の 内部には下端に弁体７を形成した常磁性体のプランジャ８が摺動自在に保持され 、固定吸引子２とプランジャ８との間には、プランジャ８の下端に形成した弁体 ７を弁座３に向けて付勢するばね９が取付けられている。また、プランジャ８と 弁本体６の間には前記ばね９より弱い第２のばね１９が取付けられている。この ばね１９は、特に全閉点付近で作用するように適宜自由長を決めたものである。 円筒１の外周にはプランジャ８を固定吸引子２に吸引作動させるためのコイル１ ０が配置されている。 前記固定吸引子２は、下向きに円錐台凸状に形成され、プランジャ８の上端は この円錐台凸状とはまり合う円錐台凹状に形成されている。また、固定吸引子２ の凸端には非磁性の緩衝部材１１が取付けられていて、固定吸引子２とプランジ ャ８の直接接触を防止する構造になっている。 このような構成において、コイル１０が無通電状態のときは、図１で示すよう にプランジャ８がばね９により押圧され、第２の弱いばね１９をたわませて閉弁 状態にある。 An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a structure example of a silent solenoid valve according to the present invention is such that a fixed attractor 2 made of a paramagnetic material is attached to the upper end of a cylinder 1 made of a non-magnetic material, and the lower end of the cylinder 1 is A valve body 6 having a valve seat 3, a primary port 4 and a secondary port 5 is attached. A paramagnetic plunger 8 having a valve body 7 formed at the lower end is slidably held inside the cylinder 1, and a valve body formed at the lower end of the plunger 8 is interposed between the fixed suction element 2 and the plunger 8. A spring 9 is attached which biases 7 towards the valve seat 3. A second spring 19 weaker than the spring 9 is mounted between the plunger 8 and the valve body 6. The spring 19 has a free length appropriately determined so as to act particularly near the fully closed point. A coil 10 for attracting the plunger 8 to the fixed attractor 2 is arranged on the outer periphery of the cylinder 1. The fixed suction element 2 is formed downward in a truncated cone convex shape, and the upper end of the plunger 8 is formed in a truncated cone concave shape that fits the truncated cone convex shape. A non-magnetic buffer member 11 is attached to the convex end of the fixed suction element 2 to prevent direct contact between the fixed suction element 2 and the plunger 8. In such a configuration, when the coil 10 is in the non-energized state, the plunger 8 is pressed by the spring 9 as shown in FIG. 1, and the second weak spring 19 is deflected to close the valve.
【０００８】 図２は、コイル電流を徐変させるための回路例で、電源１２と弁の開閉を切り 換えるリレー接点１３と、電流制限用の抵抗器１４とコンデンサ１５を直列に接 続するとともに、当該コンデンサ１５に充電された電荷を放電する抵抗器１６を コンデンサ１５に並列に接続したＣＲ回路部と、当該コンデンサ１５の電圧波形 をトランジスタ１７で幅しコイル１０を駆動する増幅回路部から構成される。１ ８はサージ電流吸収用のダイオードである。FIG. 2 shows an example of a circuit for gradually changing the coil current. A power source 12 and a relay contact 13 for switching the opening / closing of a valve, a current limiting resistor 14 and a capacitor 15 are connected in series. , A CR circuit unit in which a resistor 16 for discharging the electric charge charged in the capacitor 15 is connected in parallel to the capacitor 15, and an amplifier circuit unit for driving the coil 10 by widening the voltage waveform of the capacitor 15 with a transistor 17 To be done. Reference numeral 18 is a diode for absorbing a surge current.
【０００９】 この回路ではリレー接点１３がＯＮすると電源１２からリレー接点１３と抵抗 器１４を通って電流が流れ、コンデンサ１５に充電され、コンデンサの電圧は徐 増する。この時のコンデンサ１５の電圧波形はトランジスタ１７で増幅され、図 ３に示したように徐増電圧がコイル１０に印加される。一方、リレー接点１３を ＯＦＦにすると、コンデンサ１５は抵抗１６を通って放電し、電圧は徐減する。 この時のコンデサ１５の電圧波形はトランジスタ１７で増幅され、図３に示した ように徐減電圧がコイル１０に印加される。In this circuit, when the relay contact 13 is turned on, a current flows from the power source 12 through the relay contact 13 and the resistor 14, the capacitor 15 is charged, and the voltage of the capacitor gradually increases. The voltage waveform of the capacitor 15 at this time is amplified by the transistor 17, and the gradually increasing voltage is applied to the coil 10 as shown in FIG. On the other hand, when the relay contact 13 is turned off, the capacitor 15 discharges through the resistor 16 and the voltage gradually decreases. The voltage waveform of the capacitor 15 at this time is amplified by the transistor 17, and the gradually decreasing voltage is applied to the coil 10 as shown in FIG.
【００１０】[0010]
本実施例の作動について説明する。 図４は、プランジャ８の位置とプランジャ８に作用する閉弁力の関係を、第２ のばね１９がない場合とある場合について比較したもので、ばね１９がない場合 は、線Ｐで示す流体圧力と線ａで示す閉弁力の合成力が線ｂで示すように全閉点 近辺で大きな値になる。 これに対し第２のばね１９を設けた場合、ばね１９の作用する領域をＳ1 で示 すと、全閉点からＳ1 まで間では第２のばね１９がばね９の力を打ち消す方向に 作用し、プランジャ８には線Ａで示すばね力と、線Ｐで示す流体圧力が作用し、 その合成力である閉弁力は線Ｂで示すようになる。すなわち、線ｂで示す前者に 比較して線Ｂで示すように第２のばね１９を設けた場合は、全閉点近辺の閉弁力 だけを選択的に低下させることができ、閉弁時の弁座３と弁体７の衝突音をやわ らげることができる。 The operation of this embodiment will be described. FIG. 4 compares the relationship between the position of the plunger 8 and the valve closing force acting on the plunger 8 in the case where the second spring 19 is not provided and in the case where the second spring 19 is not provided. The combined force of the pressure and the valve closing force indicated by the line a has a large value near the fully closed point as indicated by the line b. On the other hand, in the case where the second spring 19 is provided, when the region where the spring 19 acts is indicated by S1, the second spring 19 acts in the direction of canceling the force of the spring 9 between the fully closed point and S1. The spring force indicated by the line A and the fluid pressure indicated by the line P act on the plunger 8, and the valve closing force which is the resultant force is indicated by the line B. That is, when the second spring 19 is provided as shown by the line B in comparison with the former shown by the line b, it is possible to selectively reduce only the valve closing force in the vicinity of the full closing point, and when the valve is closed. The collision noise between the valve seat 3 and the valve body 7 can be suppressed.
【００１１】 次に、ばね１９を有する本電磁弁の力の作動概念を図５，図６によりさらに詳 細に説明する。 図５は、開弁時の力の作動概念を示している（簡素化のため摩擦力は省略）。 線Ａ＝ばね力（ばね９−第２のばね１９）による閉弁力 線Ｂ1 ，Ｂ2 ，Ｂ3 ＝ばね力（線Ａ）＋流体圧力差（図示せず）による閉弁力 線Ｃ1 ，Ｃ2 ，Ｃ3 ＝コイル１０により付勢された電磁石による開弁力 （線Ｃ1 −線Ｂ1 ），（線Ｃ2 −線Ｂ2 ），（線Ｃ3 −線Ｂ3 ）＝開弁加速力 サフィックス1 ，2 ，3 は流体圧力差のいろいろな状態を示す。 固定吸引子２とプランジャ８の吸引部の形状を円錐形にした効果によって、線 Ｃに示すように開弁力は固定吸引子２近辺を除いて距離に比例した一定の力が作 用するようになった。Next, the operating concept of force of the solenoid valve having the spring 19 will be described in more detail with reference to FIGS. FIG. 5 shows the concept of actuation of force when the valve is opened (friction force is omitted for simplification). Line A = valve closing force by spring force (spring 9−second spring 19) Lines B 1 , B 2 , B 3 = spring force (line A) + valve closing force by fluid pressure difference (not shown) Line C 1 , C 2 , C 3 = valve opening force by the electromagnet urged by the coil 10 (line C 1 -line B 1 ), (line C 2 -line B 2 ), (line C 3 -line B 3 ) = Valve opening acceleration force Suffixes 1 , 2 and 3 indicate various states of fluid pressure difference. Due to the conical shape of the suction portions of the fixed suction element 2 and the plunger 8, as shown by the line C, the valve opening force is set so that a constant force proportional to the distance is applied except for the vicinity of the fixed suction element 2. Became.
【００１２】 このような記号の定義のもとに、各種条件のときの作動状態を説明すれば、 (1) （ばね力＋流体圧力差）による閉弁力が線Ｂ1 のとき、 コイル１０に通じる 電流を徐増させると、 電磁石の吸引力が線Ｃ1 にまで上がったときに開弁を始め る。 しかし、開弁加速力（線Ｃ1 −線Ｂ1 ）が小さいのでプランジャ８は従来の電 磁弁よりもゆっくりと開弁動作する。 (2) （ばね力＋流体圧力差）による閉弁力が線Ｂ2 のとき、コイル１０に通じる 電流を徐増させると、電磁石の吸引力が線Ｃ2 にまで上がったときに開弁を始め る。 (3) （ばね力＋流体圧力差）による閉弁力が線Ｂ3 のとき、コイル１０に通じる 電流を徐増させると、電磁石の吸引力が線Ｃ3 にまで上がったときに開弁を始め る。 これらの場合も開弁加速力（線Ｃ2 −線Ｂ2 ）および（線Ｃ3 −線Ｂ3 ）がとも に小さいのでプランジャ８は従来の電磁弁よりもゆっくりと開弁動作をする。 そのために、コイル１０に通じる電流を制御することによって、プランジャ８の 移動状態を制御しやすくなった。 (4) 図５に示した非磁性体の緩衝部材１１の厚さｔの効果によって、固定吸引子 ２とプランジャ８とを直接接触させないので、図５中に破線で示したような相対 的に強大な密着吸引力が作用する領域を利用しない。 (5) そのため、上記(1) 〜(3) において説明したように、プランジャ８が非磁性 の緩衝部材１１に衝突する力は小さく、さらに緩衝部材１１の緩衝効果によって 衝突音が発生しない。 また、固定吸引子２とプランジャ８の直接接触を防止しているので閉弁時の残 留磁気力を低減でき、閉弁時のプランジャ８に作用する吸引力は通電電流に比例 させることができ、制御性が向上する。Based on the definition of such symbols, the operating states under various conditions will be described. (1) When the valve closing force due to (spring force + fluid pressure difference) is line B 1 , the coil 10 By gradually increasing the current leading to the valve, the valve opening will start when the attractive force of the electromagnet rises to the line C 1 . However, since the valve opening acceleration force (line C 1 -line B 1 ) is small, the plunger 8 opens more slowly than the conventional electromagnetic valve. (2) When the valve closing force due to (spring force + fluid pressure difference) is line B 2 , gradually increasing the current flowing to the coil 10 causes the valve opening when the attractive force of the electromagnet rises to line C 2. Start. (3) When the valve closing force due to (spring force + fluid pressure difference) is line B 3 , gradually increasing the current flowing to coil 10 causes the valve opening when the attracting force of the electromagnet rises to line C 3. Start. In these cases as well, the valve opening acceleration forces (line C 2 -line B 2 ) and (line C 3 -line B 3 ) are both small, so that the plunger 8 opens more slowly than the conventional solenoid valve. Therefore, by controlling the current flowing through the coil 10, it becomes easier to control the moving state of the plunger 8. (4) Due to the effect of the thickness t of the non-magnetic buffer member 11 shown in FIG. 5, the fixed attractor 2 and the plunger 8 are not brought into direct contact with each other. Do not use the area where a strong adhesion force acts. (5) Therefore, as described in (1) to (3) above, the force with which the plunger 8 collides with the non-magnetic buffer member 11 is small, and the buffering effect of the buffer member 11 causes no collision noise. In addition, since the fixed attractor 2 and the plunger 8 are prevented from directly contacting each other, the residual magnetic force when the valve is closed can be reduced, and the attraction force acting on the plunger 8 when the valve is closed can be made proportional to the energizing current. The controllability is improved.
【００１３】 図６は、閉弁時の力の作動概念を示している（簡素化のため摩擦力は省略）。 線Ａ＝ばね力（ばね９−第２のばね１９）による閉弁力 線Ｂ1 ，Ｂ2 ，Ｂ3 ＝ばね力（線Ａ）＋流体圧力差（図示せず）による閉弁力 線Ｃ4 ，Ｃ5 ，Ｃ6 ＝コイル１０により付勢された電磁石による開弁力 （線Ｂ1 −線Ｃ4 ），（線Ｂ2 −線Ｃ5 ），（線Ｂ3 −線Ｃ6 ）＝閉弁加速力 サフィックス1 ，2 ，3 ，4 ，5 ，6 は流体圧力差のいろいろな状態を示す。FIG. 6 shows an operating concept of force when the valve is closed (friction force is omitted for simplification). Line A = valve closing force by spring force (spring 9−second spring 19) Lines B 1 , B 2 , B 3 = spring force (line A) + valve closing force by fluid pressure difference (not shown) Line C 4 , C 5 , C 6 = valve opening force by the electromagnet biased by the coil 10 (line B 1 -line C 4 ), (line B 2 -line C 5 ), (line B 3 -line C 6 ) = Valve closing acceleration suffix Suffixes 1 , 2 , 3 , 4 , 5 , and 6 indicate various states of fluid pressure difference.
【００１４】 このような記号の定義のもとに、各種条件のときの作動状態を説明すれば、 (6) （ばね力＋流体圧力差）による閉弁力が線Ｂ1 のとき、コイル１０に通じる 電流を徐減させると、電磁石の吸引力が線Ｃ4 にまで下がったときに閉弁を始め る。 しかし、閉弁加速力（線Ｂ1 −線Ｃ4 ）が小さのでプランジャ８は従来の電磁 弁よりもゆっくりと閉弁動作する。 (7) （ばね力＋流体圧力差）による閉弁力が線Ｂ2 のとき、コイル１０に通じる 電流を徐減させると、電磁石の吸引力が線Ｃ5 にまで下がったときに閉弁を始め る。 (8) （ばね力＋流体圧力差）による閉弁力が線Ｂ3 のとき、コイル１０に通じる 電流を徐減させると、電磁石の吸引力が線Ｃ6 にまで下がったときに閉弁を始め る。 これらの場合も閉弁加速力（線Ｂ2 −線Ｃ5 ）および（線Ｂ3 −線Ｃ6 ）がとも に小さのでプランジャ８は従来の電磁弁よりもゆっくりと閉弁動作をする。 そのために、コイル１０に通じる電流を制御することによって、プランジャ８ の移動状態を制御しやすくなった。Under the definitions of such symbols, the operating states under various conditions will be described. (6) When the valve closing force due to (spring force + fluid pressure difference) is line B 1 , the coil 10 By gradually reducing the current flowing through the valve, the valve closing starts when the attractive force of the electromagnet drops to the line C 4 . However, since the valve closing acceleration force (line B 1 -line C 4 ) is small, the plunger 8 operates more slowly than the conventional solenoid valve. (7) When the valve closing force due to (spring force + fluid pressure difference) is line B 2 , the current flowing to the coil 10 is gradually reduced, and the valve closing is performed when the attraction force of the electromagnet drops to line C 5. Start. (8) When the valve closing force due to (spring force + fluid pressure difference) is line B 3 , the current flowing to the coil 10 is gradually reduced, and the valve closing is performed when the attractive force of the electromagnet drops to line C 6. Start. Closing acceleration force even in these cases (line B 2 - line C 5) and - a plunger 8 in the small to (line B 3 lines C 6) Gatomo is also slowly closing operation than conventional electromagnetic valve. Therefore, by controlling the current flowing through the coil 10, it becomes easier to control the moving state of the plunger 8.
【００１５】 前記作用の説明では簡素化のためにプランジャ８に作用する摩擦力は省略して きたが、摩擦力を考慮した作用について本電磁弁をモデルかした図７により説明 する。 (9) 閉弁時、図７のように静止摩擦力がプランジャ８に作用して、コイル１０の 吸引力（Ｆ1 ）＋静止摩擦力（Ｆ2 ）の合成力が（Ｆ3 ）以下になったとき、プ ランジャ８は閉弁移動を開始する。しかし、プランジャ８が移動を開始すると、 静止摩擦力（Ｆ2 ）は動摩擦力になり、摩擦力が瞬時に低下し、プランジャ８に は相対的に大きな開弁力がいっきに作用し、プランジャ８は慣性力をもって閉弁 方向に移動しようとする。このときプランジャ８のブレーキとなるコイル１０の 吸引力（Ｆ1 ）はすでに低下しており、従って、弁体７と弁座３が衝突し、衝突 音が発生する。Although the frictional force acting on the plunger 8 is omitted for the sake of simplification in the above description of the action, the action in consideration of the frictional force will be described with reference to FIG. (9) When the valve is closed and the static friction force acts on the plunger 8 as shown in Fig. 7, and the combined force of the attraction force (F1) + static friction force (F2) of the coil 10 becomes less than (F3). , Plunger 8 starts valve closing movement. However, when the plunger 8 starts to move, the static frictional force (F2) becomes a dynamic frictional force, the frictional force is instantly reduced, and a relatively large valve opening force acts on the plunger 8 at the same time, and the plunger 8 inertia It tries to move in the valve closing direction with force. At this time, the attractive force (F1) of the coil 10 which serves as a brake for the plunger 8 has already decreased, and therefore the valve body 7 and the valve seat 3 collide with each other, and a collision noise is generated.
【００１６】 しかし、図８に示すように第２のばね１９を設置すると、プランジャ８の急激 な動きに対してこの第２のばね１９から反発力（Ｆ4 ）がプランジャ８に作用し 、これがプランジャ８のブレーキとなって、弁体７と弁座３への衝撃を緩和し、 閉弁時の無音化がはかれる。 また、プランジャ８の閉弁速度が何らかの理由により過大になった場合でも、 第２のばね１９によるブレーキ力が作用し、弁体７と弁座３の衝突を緩和するこ とができる。However, when the second spring 19 is installed as shown in FIG. 8, a repulsive force (F4) acts on the plunger 8 from the second spring 19 in response to the rapid movement of the plunger 8, which causes the plunger 8 to move. It becomes the brake of No. 8 and alleviates the impact on the valve body 7 and the valve seat 3, and the noise at the time of closing the valve can be achieved. Further, even when the valve closing speed of the plunger 8 becomes excessive for some reason, the braking force of the second spring 19 acts and the collision between the valve body 7 and the valve seat 3 can be alleviated.
【００１７】 このように、開弁時、閉弁時ともに、プランジャ８の移動速度が小さいので、 弁座３と弁体７との間の開口面積の時間変化率が小さくなり、流体の衝撃音を少 なくする効果が得られる。 なお、コイル１０に供給する電流の徐増、徐減速度を、プランジャ８の移動速 度よりも小さい値にするほど、本発明の効果を得やすくなる。As described above, since the moving speed of the plunger 8 is low both when the valve is opened and when the valve is closed, the time change rate of the opening area between the valve seat 3 and the valve body 7 becomes small, and the impact noise of the fluid is reduced. The effect of reducing the It should be noted that the effect of the present invention is more easily obtained as the gradual increase / decrease speed of the current supplied to the coil 10 is made smaller than the moving speed of the plunger 8.
【００１８】 なお、本実施例では第２のばねの作用点を全開点と全閉点の中間（Ｓ1 ）にな るように設定した場合について説明したが、全領域で作用するようにしてもプラ ンジャ８の急激な閉弁移動が防止でき、効果があった。In this embodiment, the case where the action point of the second spring is set to be between the fully open point and the fully closed point (S1) has been described. It was effective in preventing the plunger 8 from suddenly closing the valve.
【００１９】 また、電流徐変の方法は、図２に示したもの以外の、たとえばマイクロコンピ ュータによる通電時間幅制御等により、図３に類似した電流・電圧変化をさせる ものであっても同等の効果をあげることができる。Further, the method of gradually changing the current is the same as that shown in FIG. 2, even if the current / voltage change similar to that in FIG. 3 is performed by controlling the energization time width by a micro computer, for example. The effect of can be raised.
【００２０】[0020]
前記したように、本考案によればコイル１０への通電電流を徐変させてプラン ジャ８を移動させるので、簡単な構造でありながら確実にプランジャ８と固定吸 引子２あるいは弁体７と弁座３との衝突音を低減し、さらに不快な流体衝撃音の 防止ができる効果がある。また、コイル１０の通電回路も簡単な回路で構成でき る利点がある。 As described above, according to the present invention, the current flowing to the coil 10 is gradually changed to move the plunger 8, so that the plunger 8 and the fixed attractor 2 or the valve body 7 and the valve can be reliably constructed with a simple structure. This has the effect of reducing the collision noise with the seat 3 and preventing unpleasant fluid impact noise. Further, there is an advantage that the energizing circuit of the coil 10 can be configured by a simple circuit.
【００２１】 表１は、従来の電磁弁と本考案に係わる無音電動弁の作動時発生音を比較測定 した結果を示している。Table 1 shows the results of comparative measurement of the noise generated during operation of the conventional solenoid valve and the silent motor-operated valve according to the present invention.
【表１】 すなわち、本考案の構造の電磁弁に供給する電流を徐変させた場合の組み合わせ が最も静かであった。[Table 1] That is, the combination in which the current supplied to the solenoid valve having the structure of the present invention was gradually changed was the quietest.
【図１】 本考案に係る無音電磁弁の閉弁状態を示す縦
断面図。FIG. 1 is a longitudinal sectional view showing a closed state of a silent solenoid valve according to the present invention.
【図２】 本考案に係る無音電磁弁の制御回路例。FIG. 2 shows an example of a control circuit for a silent solenoid valve according to the present invention.
【図３】 本考案に係る無音電磁弁の制御回路例の出力
特性図。FIG. 3 is an output characteristic diagram of an example of a control circuit of a silent solenoid valve according to the present invention.
【図４】 本考案に係る無音電磁弁の閉弁時の力の作動
概念を示す。FIG. 4 shows a concept of operating force when a silent solenoid valve according to the present invention is closed.
【図５】 本考案に係る無音電磁弁の開弁時の力の作動
概念を示す。FIG. 5 shows a concept of operating force when a silent solenoid valve according to the present invention is opened.
【図６】 本考案に係る無音電磁弁の閉弁時の力の作動
概念を示す。FIG. 6 shows a concept of operating force when the silent solenoid valve according to the present invention is closed.
【図７】 本考案に係る無音電磁弁の閉弁時の力の作動
概念を示す。FIG. 7 shows a concept of operating force when the silent solenoid valve according to the present invention is closed.
【図８】 本考案に係る無音電磁弁の閉弁時の力の作動
概念を示す。FIG. 8 shows a concept of operating force when the silent solenoid valve according to the present invention is closed.
【図９】 従来の電磁弁の縦断面図。FIG. 9 is a vertical cross-sectional view of a conventional solenoid valve.
【図１０】 従来の電磁弁を駆動する電気制御回路。FIG. 10 shows an electric control circuit for driving a conventional solenoid valve.
【図１１】 従来の電磁弁の開弁および閉弁時の力の作
動概念図。FIG. 11 is a conceptual diagram of force operation when a conventional solenoid valve is opened and closed.
１ 円筒、 ２ 固定吸引子、 ３ 弁座、
４ 一次口、５ 二次口、 ６ 弁本体、
７ 弁体、 ８ プランジャ、９ ばね、
１０ コイル、 １１ 緩衝部材、 １２ 電源、
１３ リレー接点、１４ 抵抗器、 １５ コンデン
サ、１６ 抵抗器、１７ トランジスタ、 １８ ダ
イオード、 １９ 第２のばね。1 cylinder, 2 fixed aspirator, 3 valve seat,
4 primary port, 5 secondary port, 6 valve body,
7 valve body, 8 plunger, 9 spring,
10 coil, 11 buffer member, 12 power supply,
13 relay contacts, 14 resistors, 15 capacitors, 16 resistors, 17 transistors, 18 diodes, 19 second springs.
Claims (1)
りなる固定吸引子２を取付け、該円筒１の下端部には弁
座３，一次口４，二次口５を形成した弁本体６を取付
け、該円筒１の内部には下端に弁体７を形成した常磁性
体のプランジャ８を摺動自在に保持し、前記固定吸引子
２とプランジャ８との間には、プランジャ８の下端に形
成した弁体７を弁座３に向けて付勢するばね９を設け、
該円筒１の外周にコイル１０を配置した電磁弁におい
て、固定吸引子２とプランジャ８の吸引部を相互に合致
する円錐台形に形成するとともに、固定吸引子２とプラ
ンジャ８との間には非磁性の緩衝部材１１を介在させ
て、固定吸引子２とプランジャ８との直接接触を防止
し、弁本体６とプランジャ８との間に前記ばね９より弱
い第２のばね１９を設け、さらにコイル１０に通電する
電流を徐変することによりプランジャ８を徐動させるよ
うに構成したことを特徴とする無音電磁弁。1. A fixed suction element 2 made of paramagnetic material is attached to the upper end of a non-magnetic cylinder 1, and a valve seat 3, a primary port 4 and a secondary port 5 are formed at the lower end of the cylinder 1. A valve body 6 is attached, and a paramagnetic plunger 8 having a valve body 7 formed at the lower end is slidably held inside the cylinder 1, and a plunger is provided between the fixed suction element 2 and the plunger 8. A spring 9 for urging the valve element 7 formed at the lower end of the valve 8 toward the valve seat 3;
In the solenoid valve in which the coil 10 is arranged on the outer circumference of the cylinder 1, the suction portions of the fixed suction element 2 and the plunger 8 are formed in a truncated cone shape that matches each other, and there is no space between the fixed suction element 2 and the plunger 8. A magnetic cushioning member 11 is interposed to prevent direct contact between the fixed suction element 2 and the plunger 8, a second spring 19 weaker than the spring 9 is provided between the valve body 6 and the plunger 8, and a coil is further provided. A silent solenoid valve characterized in that the plunger 8 is gradually moved by gradually changing the current passed through 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7902092U JPH0635757U (en) | 1992-10-19 | 1992-10-19 | Silent solenoid valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7902092U JPH0635757U (en) | 1992-10-19 | 1992-10-19 | Silent solenoid valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0635757U true JPH0635757U (en) | 1994-05-13 |
Family
ID=13678264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7902092U Pending JPH0635757U (en) | 1992-10-19 | 1992-10-19 | Silent solenoid valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0635757U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014156921A (en) * | 2013-02-18 | 2014-08-28 | Tgk Co Ltd | Solenoid valve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5623767B2 (en) * | 1975-04-16 | 1981-06-02 | ||
| JPS63275870A (en) * | 1987-05-01 | 1988-11-14 | Taisan Kogyo Kk | Flow control nozzle |
-
1992
- 1992-10-19 JP JP7902092U patent/JPH0635757U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5623767B2 (en) * | 1975-04-16 | 1981-06-02 | ||
| JPS63275870A (en) * | 1987-05-01 | 1988-11-14 | Taisan Kogyo Kk | Flow control nozzle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014156921A (en) * | 2013-02-18 | 2014-08-28 | Tgk Co Ltd | Solenoid valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU692955B2 (en) | Solenoid with magnetic control of armature velocity | |
| JP5137960B2 (en) | Electro-pneumatic pressure transducer | |
| JP2002536605A (en) | Proportional pressure regulating valve | |
| KR880002712A (en) | Brake pressure controller | |
| JP3442405B2 (en) | Duty drive solenoid valve | |
| EP0851164A2 (en) | Control system for pulse width modulation-operated solenoid valves | |
| TW557462B (en) | Self-holding type solenoid-operated valve | |
| JPH0650459A (en) | Moderate action solenoid valve | |
| JP2000142353A (en) | Brake control solenoid valve | |
| KR920001114A (en) | Proportional flow control valve | |
| KR20080033156A (en) | Velocity control of exhaust valve actuation | |
| KR950006290A (en) | Valve device | |
| JPH0635757U (en) | Silent solenoid valve | |
| JP3424861B2 (en) | Step flow control valve | |
| JPH06207684A (en) | Noiseless solenoid valve | |
| US20050056712A1 (en) | Fuel injection valve | |
| JP2001041340A (en) | Solenoid valve | |
| JP2003314734A (en) | Control apparatus for electromagnetically driven valve | |
| JP2000130128A (en) | Solenoid valve | |
| JP4441370B2 (en) | Anti-lock brake control device for vehicle | |
| JPH1130114A (en) | Solenoid valve drive device | |
| JPH0749158Y2 (en) | solenoid valve | |
| JP2000002163A (en) | Fuel injection device and electromagnet device | |
| JP2000074248A (en) | Solenoid valve | |
| JPH0430351Y2 (en) |