JPH073045Y2 - Hydraulic servo valve - Google Patents
Hydraulic servo valveInfo
- Publication number
- JPH073045Y2 JPH073045Y2 JP1988126818U JP12681888U JPH073045Y2 JP H073045 Y2 JPH073045 Y2 JP H073045Y2 JP 1988126818 U JP1988126818 U JP 1988126818U JP 12681888 U JP12681888 U JP 12681888U JP H073045 Y2 JPH073045 Y2 JP H073045Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil
- servo valve
- spool
- hydraulic servo
- signal
- 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
- 238000007789 sealing Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 45
- 238000013016 damping Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Landscapes
- Servomotors (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は油槽に設置される油圧サーボ弁に関し、特にこ
の種の油圧サーボ弁におけるスプールの自励振動を防止
するダンピング装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a hydraulic servo valve installed in an oil tank, and more particularly to a damping device for preventing self-excited vibration of a spool in this type of hydraulic servo valve.
従来、空気圧力信号又は電気信号を変換した力とバネの
力を対向させてスプールの変位を決定する構成の油圧サ
ーボ弁が広く採用されているが、入力信号の力が小さい
あるいはスプリング定数が小さいのに対して、スプール
コイル内部の油などの可動部の慣性が大きくかつ油の動
圧力の影響が大きくスプールが自励振動を起こし易いも
のであった。Conventionally, a hydraulic servo valve having a configuration in which a force obtained by converting an air pressure signal or an electric signal and a spring force are opposed to each other to determine the displacement of the spool has been widely adopted, but the force of the input signal is small or the spring constant is small. On the other hand, the inertia of the movable part such as oil inside the spool coil is large, and the dynamic pressure of the oil has a great influence, so that the spool easily causes self-excited vibration.
従って、かかる欠点を解消するため、スプール速度を検
出し、電気的にダンピングを付与する油圧サーボ弁が実
開昭61−131505号公報あるいは実公昭63−23602号公報
記載の考案により提案されるとともに特公昭61−50163
号公報あるいは特公昭62−44122号公報記載の考案等が
提案されている。Therefore, in order to eliminate such drawbacks, a hydraulic servo valve that detects the spool speed and electrically imparts damping is proposed by the invention described in Japanese Utility Model Publication No. 61-131505 or Japanese Utility Model Publication No. 63-23602. Japanese Patent Sho 61-50163
The invention described in Japanese Patent Publication No. 62-44122 or Japanese Patent Publication No. 62-44122 has been proposed.
又、電気油圧サーボ弁においてムービングコイル部を油
中に入れコイルと油の抵抗によりダンピングを付与する
手段も開発されている。Also, in the electro-hydraulic servo valve, a means has been developed in which the moving coil portion is put in oil to provide damping by the resistance of the coil and the oil.
さて、前記した油圧サーボ弁におけるダンピング装置と
して実開昭61−131505号公報および実公昭63−23602号
公報記載の考案にあっては構成上コスト高となり経済性
に乏しい欠点を有するとともに特公昭61−50163号公報
および特公昭62−44122号公報記載の考案にあってはゴ
ミ等の対策上の問題を有しさらにムービングコイル部を
油中に入れる構成にあっては永久磁石部まで油が入るの
で、鉄粉吸着等の影響があり、コイル，永久磁石部のメ
ンテナンス上の困難性を有する等の欠点が存在するもの
であった。In the invention described in Japanese Utility Model Laid-Open No. 61-131505 and Japanese Utility Model Publication No. 63-23602, there is a drawback in that the cost is high in structure and the economy is poor, and the damping device in the hydraulic servo valve described above is used. In the inventions disclosed in -50163 and Japanese Patent Publication No. 62-44122, there is a problem in terms of measures against dust and the like, and when the moving coil part is immersed in oil, oil enters the permanent magnet part. Therefore, there are drawbacks such as the effect of adsorption of iron powder and the difficulty of maintenance of the coil and the permanent magnet section.
因って、本考案は従来のダンピング装置における欠点に
鑑みて考案されたもので、構成簡易にして経済性並びに
メンテナンス上の困難性なく性能のすぐれたダンピング
作用を発揮し得る油圧サーボ弁の提供を目的とするもの
である。Therefore, the present invention has been devised in view of the drawbacks of the conventional damping device, and provides a hydraulic servo valve which has a simple structure and is capable of exhibiting a high-performance damping action without difficulty in economy and maintenance. The purpose is.
空気圧信号または電気信号を変換した力と、バネの力を
対向させてスプールの変位を決定する油圧サーボ弁にお
いて、前記信号を変換する部分を大気内に設け、前記信
号を変換する部分とスプールの間に油室、大気シールダ
イヤフラムを設け、前記信号を変換する部分と反対側の
スプールの端部を油溜の油面よりも下位に設置すると共
に、当該端部と油溜との間に、油が往復する固定絞りを
有した絞り板を設けたことを特徴としている。In a hydraulic servo valve that determines the displacement of the spool by opposing the force of the air pressure signal or the electric signal and the force of the spring, the portion that converts the signal is provided in the atmosphere, and the portion that converts the signal and the spool An oil chamber and an air-sealing diaphragm are provided in between, and the end of the spool on the side opposite to the portion for converting the signal is installed lower than the oil surface of the oil reservoir, and between the end and the oil reservoir, It is characterized in that a diaphragm plate having a fixed diaphragm through which oil reciprocates is provided.
このような構成では、信号を変換する部分が大気中にあ
り、油と接触しないので油中の塵や鉄粉が当該信号を変
換する部分に付着することがなく、メンテナンスが容易
となる。また、絞り板の固定絞りを介してスプールの端
部と油溜との間に油が往復するため、この油により確実
にダンピング効果を得ることができる。With such a configuration, since the signal converting portion is in the atmosphere and does not come into contact with oil, dust or iron powder in the oil does not adhere to the signal converting portion, and maintenance is facilitated. Further, since the oil reciprocates between the end portion of the spool and the oil reservoir via the fixed throttle of the throttle plate, this oil can surely obtain a damping effect.
以下本考案油圧サーボ弁の実施例を図面とともに説明す
る。An embodiment of the hydraulic servo valve of the present invention will be described below with reference to the drawings.
（第１実施例） 第１図は本考案油圧サーボ弁の第１実施例を示す縦断側
面図である。(First Embodiment) FIG. 1 is a vertical sectional side view showing a first embodiment of a hydraulic servo valve according to the present invention.
本考案油圧サーボ弁20の構成中、スリーブ21内に上下方
向（矢印10に示す方向）にスライド自在に内装したスプ
ール６の一方の端部6a側をダンピング装置としての構成
に使用すべく、他方の端部6b側に位置せしめて、ゼロ調
スプリング１およびこれに対向せしめて対向スプリング
２をそれぞれ弾装してある。またスリーブ21に固定した
永久磁石４に対応せしめてスプール６の端部6bに固定し
たコイル部５の電磁力を介してスプール６をゼロ調スプ
リング１あるいは対向スプリング２の弾力に抗して矢印
10方向に変化せしめることができるように構成されてい
る。In the construction of the hydraulic servo valve 20 of the present invention, one end 6a side of the spool 6 which is slidably installed in the sleeve 21 in the vertical direction (the direction indicated by the arrow 10) is used for the construction as a damping device, and the other end is used. The zero adjustment spring 1 and the facing spring 2 facing each other are mounted on the end 6b side of the above. In addition, the spool 6 is resisted against the elastic force of the zero adjustment spring 1 or the opposing spring 2 through the electromagnetic force of the coil portion 5 fixed to the end 6b of the spool 6 corresponding to the permanent magnet 4 fixed to the sleeve 21.
It is configured so that it can be changed in 10 directions.
しかして、前記スプール６の端部6aの側には固定絞り８
を備える絞り板22を油室７を介して固定するとともに当
該スプール６の端部6aを油槽あるいは油溜の油９の油面
9a下に位置せしめることにより構成されている。この絞
り板22は薄い板に絞り孔加工して、スリーブ21における
スプール６の端部6a側に取り付けるだけであり、構造が
簡単である。またオリフィスプレートに近い作用をする
ため、温度などによる油の粘度変化の影響も小さいもの
となっている。Then, the fixed throttle 8 is provided on the end 6a side of the spool 6.
Is fixed through the oil chamber 7, and the end 6a of the spool 6 is attached to the oil surface of the oil 9 in the oil tank or the oil reservoir.
It is constructed by placing it under 9a. The diaphragm plate 22 is a thin plate and is simply attached to the end portion 6a side of the spool 6 in the sleeve 21, and the structure is simple. Further, since it acts like an orifice plate, the influence of changes in oil viscosity due to temperature and the like is small.
尚、図中３は油室、大気シールダイヤフラムを示すもの
である。これにより、コイル部５及び永久磁石４は大気
中にありスプール６の部分からの作動油の侵入を防止
し、コイル部５及び永久磁石４に鉄粉や塵が付着しない
ようにしている。Incidentally, reference numeral 3 in the drawing denotes an oil chamber and an atmospheric sealing diaphragm. As a result, the coil portion 5 and the permanent magnet 4 are in the atmosphere and prevent the hydraulic oil from invading from the portion of the spool 6 and prevent iron powder and dust from adhering to the coil portion 5 and the permanent magnet 4.
かかる構造から成る油圧サーボ弁20において、スプール
６が可動部の慣性や油の動圧力等によって矢印10方向に
自励振動を起こした場合、スプール６の端部6aのポンピ
ング作用により油室７中の油と油槽あるいは油溜の油９
は固定絞り８を介して往復する。In the hydraulic servo valve 20 having such a structure, when the spool 6 causes self-excited vibration in the direction of the arrow 10 due to the inertia of the movable portion, the dynamic pressure of oil, etc., the pumping action of the end 6a of the spool 6 causes Oil and oil in oil tank or sump 9
Reciprocates through the fixed diaphragm 8.
この時、固定絞り８の抵抗により油室７にはスプール６
の振動方向と逆の油圧が発生し、スプール６にダンピン
グを付与することができるものである。At this time, the spool 6 is placed in the oil chamber 7 due to the resistance of the fixed throttle 8.
The oil pressure is generated in the opposite direction to the vibration direction, and damping can be applied to the spool 6.
尚、前記構成から成る油圧サーボ弁20の駆動源は電気信
号に限定されず、空気信号でも実施可能である。The drive source of the hydraulic servo valve 20 having the above configuration is not limited to an electric signal, and an air signal can be used.
また、ダンピング効果については、第４図a,bに示すと
おり、本考案の油圧サーボ弁20の構成を具備しない油圧
サーボ弁の場合には第４図ａの如く、スプールに自励振
動が発生するのに対して、本考案の油圧サーボ弁20の場
合には第４図ｂに示す如くスプールの自励振動の発生を
防止することができるものである。Regarding the damping effect, as shown in FIGS. 4a and 4b, in the case of a hydraulic servo valve which does not have the structure of the hydraulic servo valve 20 of the present invention, self-excited vibration occurs in the spool as shown in FIG. 4a. On the other hand, in the case of the hydraulic servo valve 20 of the present invention, the self-excited vibration of the spool can be prevented as shown in FIG. 4b.
（第２実施例） 第２図は本考案油圧サーボ弁の油溜構成の実施例を示す
縦断面図である。(Second Embodiment) FIG. 2 is a longitudinal sectional view showing an embodiment of the oil reservoir structure of the hydraulic servo valve according to the present invention.
かかる実施例における構成中、11はモーター、12はポン
プ、13は油槽を示すもので、その他の構成は第１図示の
構成と同一であるので同一番号を付し、その説明を省略
する。In the structure of this embodiment, 11 is a motor, 12 is a pump, and 13 is an oil tank. Since other structures are the same as those shown in the first drawing, the same reference numerals are given and their explanations are omitted.
尚、作用，効果も第１実施例と同様であるので、説明を
省略する。Since the operation and effect are similar to those of the first embodiment, the description will be omitted.
（第３実施例） 第３図は本考案油圧サーボ弁の油溜構成の実施例を示す
縦断面図である。(Third Embodiment) FIG. 3 is a longitudinal sectional view showing an embodiment of the oil reservoir structure of the hydraulic servo valve according to the present invention.
かかる実施例の構成中、14はスリーブ21の端部21aに一
体に設けた油溜部を示し、その他の構成については第１
図示の第１実施例と同一の構成から成り同一の構成部分
には同一番号を付し、その説明を省略するとともに作
用，効果についても第１実施例と同様であるので説明を
省略する。In the structure of this embodiment, reference numeral 14 denotes an oil reservoir provided integrally with the end 21a of the sleeve 21, and the other structures are the first
The same components as those in the illustrated first embodiment and the same components are designated by the same reference numerals, and the description thereof will be omitted. The operation and effect are also the same as those of the first embodiment, and therefore the description thereof will be omitted.
以上の説明から明らかな通り、本考案の油圧サーボ弁に
よれば、信号を変換する部分が大気中にあるので、この
部分にダンピング用の別の油を入れる必要もないし、ま
た、作動油が出入りすることにより作動油中の鉄粉や塵
がコイル部や永久磁石に付着することもなく、簡単な構
造で低コストで性能の良い油圧サーボ弁を提供すること
ができる。As is apparent from the above description, according to the hydraulic servo valve of the present invention, since the signal converting portion is in the atmosphere, it is not necessary to add another oil for damping to this portion, and the hydraulic oil is It is possible to provide a hydraulic servo valve having a simple structure, low cost, and good performance, because iron powder and dust in the hydraulic oil do not adhere to the coil portion and the permanent magnets when the oil comes in and out.
第１図は本考案の油圧サーボ弁の第１実施例を示す縦断
側面図、第２図は本考案の油圧サーボ弁の油槽構成の実
施例を示す縦断面図、第３図は本考案の油圧サーボ弁の
油溜構成の実施例を示す縦断面図、第４図a,bは油圧サ
ーボ弁のダンピング効果を示す線図である。 １…ゼロ調スプリング ２…対向スプリング ３…油室，大気シールダイヤフラム ４…永久磁石 ５…コイル部 ６…スプール ７…油室 ８…固定絞り ９…油槽中の油，油溜 10…スプール動作方向 11…モータ 12…ポンプ 13…油槽 14…油溜め部FIG. 1 is a vertical sectional side view showing a first embodiment of a hydraulic servo valve of the present invention, FIG. 2 is a vertical sectional view showing an embodiment of an oil tank structure of the hydraulic servo valve of the present invention, and FIG. FIG. 4 is a vertical sectional view showing an embodiment of the oil reservoir structure of the hydraulic servo valve, and FIGS. 4A and 4B are diagrams showing the damping effect of the hydraulic servo valve. 1 ... Zero adjustment spring 2 ... Opposing spring 3 ... Oil chamber, atmospheric sealing diaphragm 4 ... Permanent magnet 5 ... Coil part 6 ... Spool 7 ... Oil chamber 8 ... Fixed throttle 9 ... Oil in oil tank, oil sump 10 ... Spool operating direction 11 ... Motor 12 ... Pump 13 ... Oil tank 14 ... Oil sump
Claims (1)
と、バネの力を対向させてスプールの変位を決定する油
圧サーボ弁において、前記信号を変換する部分を大気内
に設け、前記信号を変換する部分とスプールの間に油
室、大気シールダイヤフラムを設け、前記信号を変換す
る部分と反対側のスプールの端部を油溜の油面よりも下
位に設置すると共に、当該端部と油溜との間に、油が往
復する固定絞りを有した絞り板を設けたことを特徴とす
る油圧サーボ弁。1. A hydraulic servo valve for determining a displacement of a spool by opposing a force obtained by converting an air pressure signal or an electric signal and a force of a spring, a portion for converting the signal is provided in the atmosphere, and the signal is converted. An oil chamber and an air-sealing diaphragm are provided between the portion to be spooled and the spool, the end of the spool on the side opposite to the portion for converting the signal is installed below the oil surface of the oil reservoir, and the end and the oil reservoir are placed. A hydraulic servo valve characterized in that a throttle plate having a fixed throttle through which oil reciprocates is provided between and.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988126818U JPH073045Y2 (en) | 1988-09-28 | 1988-09-28 | Hydraulic servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988126818U JPH073045Y2 (en) | 1988-09-28 | 1988-09-28 | Hydraulic servo valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0247405U JPH0247405U (en) | 1990-03-30 |
| JPH073045Y2 true JPH073045Y2 (en) | 1995-01-30 |
Family
ID=31378683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988126818U Expired - Lifetime JPH073045Y2 (en) | 1988-09-28 | 1988-09-28 | Hydraulic servo valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073045Y2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5347924B2 (en) * | 1973-12-07 | 1978-12-25 | ||
| JPS61175302A (en) * | 1985-01-30 | 1986-08-07 | Hitachi Ltd | Force motor type servo valve |
-
1988
- 1988-09-28 JP JP1988126818U patent/JPH073045Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0247405U (en) | 1990-03-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5042786A (en) | Hydraulically damped rubber mounting | |
| FR2434311A1 (en) | PNEUMATIC SPRING, ESPECIALLY FOR VEHICLES | |
| WO2003102979B1 (en) | Force motor with increased proportional stroke | |
| JPH061884U (en) | Vibration suppression actuator | |
| JP4072696B2 (en) | Fluid filled active vibration isolator | |
| JPH073045Y2 (en) | Hydraulic servo valve | |
| US6032937A (en) | Vibration isolating apparatus | |
| JPS59191442U (en) | Anti-vibration rubber | |
| JP2543707Y2 (en) | Proportional flow control valve | |
| JP3689321B2 (en) | Liquid filled vibration isolator | |
| JP3404112B2 (en) | Electronically controlled liquid-filled mount | |
| KR19980054770A (en) | Active Engine Mount with Cam | |
| JP2635226B2 (en) | Magnetically coupled sealed oil damper | |
| JPH0262182U (en) | ||
| JPS59121220U (en) | Vehicle wheel suspension system | |
| JPS62270843A (en) | Mounting device for power unit | |
| JPH09264362A (en) | Friction damper | |
| JPS5957945U (en) | Internal pressure variable device for fluid flow path | |
| JPS6035211U (en) | Actuator position detector | |
| JPS5921298Y2 (en) | Layered leaf spring device | |
| JP2513828Y2 (en) | Differential mounting structure | |
| JPS5838208Y2 (en) | valve | |
| JPH0210354Y2 (en) | ||
| JPH0328195Y2 (en) | ||
| JPS6164537U (en) |