JPH0134723Y2 - - Google Patents
Info
- Publication number
- JPH0134723Y2 JPH0134723Y2 JP16727483U JP16727483U JPH0134723Y2 JP H0134723 Y2 JPH0134723 Y2 JP H0134723Y2 JP 16727483 U JP16727483 U JP 16727483U JP 16727483 U JP16727483 U JP 16727483U JP H0134723 Y2 JPH0134723 Y2 JP H0134723Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- passage
- valve
- hydraulic
- displacement conversion
- 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 30
- 230000007246 mechanism Effects 0.000 claims description 29
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 239000003921 oil Substances 0.000 claims description 15
- 239000010720 hydraulic oil Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims 1
- 239000000446 fuel Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
Description
【考案の詳細な説明】
この考案は、油圧ポンプの動作で得られた油圧
を利用して複数の圧力−変位変換機構を駆動する
油圧アクチエータに関するものである。[Detailed Description of the Invention] This invention relates to a hydraulic actuator that drives a plurality of pressure-displacement conversion mechanisms using hydraulic pressure obtained by operating a hydraulic pump.
相互に異なる圧力で動作する複数の圧力−変位
変換機構を設け、油圧ポンプの圧力を段階的に変
化させて各圧力−変位変換機構をシーケンシヤル
に動作させるようにした油圧アクチエータは、た
とえばガス器具の元弁および主弁を開閉動作させ
るためのアクチエータとしてすでに公知である。
このような油圧アクチエータにおいて、各圧力−
変位変換機構を瞬時のもとの状態に復帰させるこ
とが必要となる場合がある。その一例として、ガ
ス器具の元弁および主弁を開いて定常燃焼状態に
入つたのちに、消炎などの異常が発生した場合に
は、元弁および主弁を急速に遮断することが要請
される。ところが圧力−変位変換機構に所定の動
作圧力を与えるために、作動油の通路には口径の
小さいオリフイスが挿入されているので、油圧ポ
ンプが停止しても、圧力−変位変換機構が元の状
態に復帰するのに時間がかかる。またこの圧力を
急速に開放するために、オリフイスをまたぐバイ
パス路と、瞬時遮断を必要とするときに開く電磁
弁を設けることが考えられるが、価格の上昇を伴
うばかりでなく、電磁弁を制御する制御装置も複
雑となり、また電磁弁や制御装置の故障の危険が
あり、信頼性が低下する欠点がある。 A hydraulic actuator is equipped with a plurality of pressure-displacement conversion mechanisms that operate at mutually different pressures, and the pressure of a hydraulic pump is changed stepwise to operate each pressure-displacement conversion mechanism sequentially. It is already known as an actuator for opening and closing the main valve and the main valve.
In such a hydraulic actuator, each pressure -
It may be necessary to return the displacement conversion mechanism to its original state instantaneously. For example, if an abnormality such as flame extinction occurs after the main valve and main valve of a gas appliance are opened to enter a steady combustion state, the main valve and main valve are required to be shut off quickly. . However, in order to apply a predetermined operating pressure to the pressure-displacement conversion mechanism, a small-diameter orifice is inserted into the hydraulic oil passage, so even if the hydraulic pump stops, the pressure-displacement conversion mechanism remains in its original state. It takes time to recover. In order to rapidly release this pressure, it is conceivable to install a bypass path that straddles the orifice and a solenoid valve that opens when instantaneous shutoff is required, but this would not only increase the price, but also control the solenoid valve. The control device for the control device is also complicated, and there is a risk of failure of the solenoid valve or the control device, resulting in reduced reliability.
この考案は、所定の圧力を受けて動作している
圧力−変位変換機構を油圧ポンプの停止と同時に
急速に復帰させることができる構造の簡単な油圧
解放手段を備えた油圧アクチエータを提供するこ
とを目的としている。 This invention aims to provide a hydraulic actuator equipped with a simple hydraulic release means that can quickly return the pressure-displacement conversion mechanism operating under a predetermined pressure to the original state at the same time as the hydraulic pump stops. The purpose is
以下にこの考案の一実施例について図面を参照
して説明する。第１図において、符号１は作動油
を収容するオイルタンク、２は油圧ポンプ、３お
よび４は圧力−変位変換機構、５は電磁三方弁、
６はチエツク弁、７および８はオリフイスであ
る。油圧ポンプ２は、オイルタンク１から系路９
を介して吸引された作動油を系路１０側に吐出す
る。油圧ポンプ２から系路１０側に吐出された作
動油は、電磁三方弁５の状態に応じて、系路１１
または１２に送られ、ついでオイルタンク１に戻
る経路で循環する。系路１１に設けられたオリフ
イス７のオリフイス径は、系路１２に設けられた
オリフイス８のオリフイス径よりも大きく、した
がつて油圧ポンプ２の吐出流量が一定であれば、
電磁三方弁５が系路１１側に開いているときに圧
力−変位変換機構３に与えられる圧力Ｐ１に比較
して、電磁三方弁５が系路１２側に開いていると
きに圧力−変位変換器４に与えられる圧力Ｐ２の
方が高い。 An embodiment of this invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is an oil tank containing hydraulic oil, 2 is a hydraulic pump, 3 and 4 are pressure-displacement conversion mechanisms, 5 is an electromagnetic three-way valve,
6 is a check valve, and 7 and 8 are orifices. The hydraulic pump 2 is connected to a system line 9 from the oil tank 1.
The hydraulic oil sucked through is discharged to the system line 10 side. The hydraulic oil discharged from the hydraulic pump 2 to the system line 10 is transferred to the system line 11 depending on the state of the electromagnetic three-way valve 5.
Alternatively, the oil is sent to the oil tank 12 and then circulated through a route that returns to the oil tank 1. The orifice diameter of the orifice 7 provided in the system path 11 is larger than the orifice diameter of the orifice 8 provided in the system path 12. Therefore, if the discharge flow rate of the hydraulic pump 2 is constant,
Compared to the pressure P1 applied to the pressure-displacement conversion mechanism 3 when the electromagnetic three-way valve 5 is open to the system path 11 side, pressure-displacement conversion is applied when the electromagnetic three-way valve 5 is open to the system path 12 side. The pressure P2 applied to the vessel 4 is higher.
さらに系路１２には、電磁三方弁５とオリフイ
ス８との間に位置して、急速排出弁１３が設けら
れている。この急速排出弁１３は、電磁三方弁５
側に連通する入口側の圧力が、オリフイス８側に
連通する出口側の圧力よりも低くなつたときに、
この出口側の圧力を系路１４を介してオイルタン
ク１側に開放する機能を有するもので、たとえば
第２図に示すような構造のものである。第２図に
おいて、弁体１５を収容する弁室１６は、電磁三
方弁５側に連なる通路１７と、オリフイス８側に
連なる通路１８と、系路１４に連なる通路１９と
に連通している。弁体１５は、第２図ａに示す通
路１９の開口を閉じた位置と、第２図ｂに示す通
路１７の開口を閉じた位置との間で移動可能であ
り、この弁体１５の移動は、通路１７および１８
間における圧力の大小関係に応じて自動的に行わ
れる。すなわち通路１７内の圧力が通路１８内の
圧力よりも高い状態では、通路１７から弁室１６
内に流入した作動油は弁体１５を押し下げ、つい
で通路１８を通つて系路１２に流れ、弁体１５に
よつて閉じられた通路１９には流れない。これに
よつてオリフイス８による高い圧力Ｐ２が圧力−
変位変換機構４に与えられる。つぎに電磁ポンプ
２が停止し、あるいは電磁三方弁５が切換えられ
ることによつて通路１７からの作動油の流入がな
くなると、圧力−変位変換機構４の復帰力によつ
て通路１８内の作動油が弁室１６内に逆流し、こ
の動圧を受けて弁体１５は上昇して通路１７の開
口を閉じ、同時に通路１９の開口を開く。この状
態では、通路１８および１９が連通し、系路１２
内の圧力は系路１４を経て急速に開放される。 Furthermore, a quick discharge valve 13 is provided in the system 12, located between the electromagnetic three-way valve 5 and the orifice 8. This quick discharge valve 13 is an electromagnetic three-way valve 5.
When the pressure on the inlet side communicating with the side becomes lower than the pressure on the outlet side communicating with the orifice 8 side,
It has a function of releasing the pressure on the outlet side to the oil tank 1 side via the system line 14, and has a structure as shown in FIG. 2, for example. In FIG. 2, the valve chamber 16 that accommodates the valve body 15 communicates with a passage 17 connected to the electromagnetic three-way valve 5 side, a passage 18 connected to the orifice 8 side, and a passage 19 connected to the system path 14. The valve body 15 is movable between a position where the opening of the passage 19 is closed as shown in FIG. 2a and a position where the opening of the passage 17 is closed as shown in FIG. are passages 17 and 18
This is done automatically depending on the magnitude of the pressure between them. That is, in a state where the pressure in the passage 17 is higher than the pressure in the passage 18, the passage 17 is drained from the valve chamber 16.
The hydraulic oil that has flowed into the valve body pushes down the valve body 15 and then flows into the system line 12 through the passage 18, but does not flow into the passage 19 which is closed by the valve body 15. As a result, the high pressure P2 caused by the orifice 8 is reduced to -
It is applied to the displacement conversion mechanism 4. Next, when the electromagnetic pump 2 stops or the electromagnetic three-way valve 5 is switched, and the flow of hydraulic oil from the passage 17 stops, the pressure-displacement conversion mechanism 4 restores the operation in the passage 18. Oil flows back into the valve chamber 16, and in response to this dynamic pressure, the valve body 15 rises to close the opening of the passage 17 and at the same time open the opening of the passage 19. In this state, passages 18 and 19 are in communication, and system line 12
The internal pressure is rapidly released via line 14.
第１の圧力−変位変換機構３は、系路１０内の
圧力が第１の圧力Ｐ１に達したときに動作し、ま
た第２の圧力−変位変換機構４は系路１２内の圧
力がＰ２に達したときにはじめて動作するように
各々の動作圧力が設定されている。あるいは第１
の圧力−変位変換機３は、第１の圧力Ｐ１で変位
部材をその移動範囲の中途まで変位させ、第２の
圧力に達したときに移動範囲の終端まで変位させ
るように構成してもよい。圧力−変位変換機構３
および４のこのような動作圧力の設定は、各々の
受圧面積および（または）対抗ばねの強さを適当
な値に選ぶことによつて容易に行うことができ
る。また系路１０には、動作圧力が同一の、もし
くは相互に異なる複数の圧力−変位変換機構を接
続してもよい。 The first pressure-displacement conversion mechanism 3 operates when the pressure within the system line 10 reaches the first pressure P1, and the second pressure-displacement conversion mechanism 4 operates when the pressure within the system line 12 reaches P2. Each operating pressure is set so that it operates only when the pressure reaches . Or the first
The pressure-displacement converter 3 may be configured to displace the displacement member halfway through its movement range at the first pressure P1, and to displace it to the end of the movement range when the second pressure is reached. . Pressure-displacement conversion mechanism 3
Setting of such operating pressures in (4) and (4) can be easily performed by selecting appropriate values for each pressure-receiving area and/or the strength of the opposing spring. Further, a plurality of pressure-displacement conversion mechanisms having the same or different operating pressures may be connected to the system 10.
圧力−変位変換機構３および４は、たとえば燃
焼器のバーナに燃料を供給するための燃料供給路
に設けたバルブを制御するために使用される。一
例を示すと、第１の圧力−変位変換機構３は元弁
およびパイロツト弁を駆動し、そして第２の圧力
−変位変換機構４はメイン弁を駆動するように構
成される。 The pressure-displacement conversion mechanisms 3 and 4 are used, for example, to control valves provided in a fuel supply path for supplying fuel to a burner of a combustor. As an example, the first pressure-displacement conversion mechanism 3 is configured to drive the main valve and the pilot valve, and the second pressure-displacement conversion mechanism 4 is configured to drive the main valve.
したがつて電磁三方弁５が系路１２側に切換え
られた状態では、油圧ポンプ２から吐出された作
動油は電磁三方弁５から急速排出弁１３に向い、
通路１７、弁室１６および通路１８を経てオリフ
イス８からオイルタンクに流れることにより、急
速排出弁１３が設けられていない場合と同様に、
圧力−変位変換機構４に第２の圧力Ｐ２が作用す
る。また電磁三方弁５が系路１１側に切換えられ
るか、あるいは電磁ポンプ２が停止した場合に
は、系路１２内の高圧の作動油は通路１８から弁
室１６および通路１９を通り、系路１４を経てオ
イルタンク１に戻されることにより、圧力−変位
変換機構４に作用していた圧力は瞬時に開放され
る。 Therefore, when the electromagnetic three-way valve 5 is switched to the system line 12 side, the hydraulic fluid discharged from the hydraulic pump 2 is directed from the electromagnetic three-way valve 5 to the quick discharge valve 13.
By flowing from the orifice 8 to the oil tank via the passage 17, the valve chamber 16 and the passage 18, as in the case where the quick drain valve 13 is not provided,
A second pressure P2 acts on the pressure-displacement conversion mechanism 4. Furthermore, when the electromagnetic three-way valve 5 is switched to the system line 11 side or when the electromagnetic pump 2 is stopped, the high-pressure hydraulic oil in the system line 12 passes from the passage 18 through the valve chamber 16 and the passage 19, and the system By returning the oil to the oil tank 1 via the oil tank 14, the pressure acting on the pressure-displacement conversion mechanism 4 is instantly released.
以上のようにこの考案によれば、オリフイス径
の異なるオリフイスを設けた２つの系路内の圧力
で複数の圧力−変位変換機構を変位させるように
した油圧アクチエータにおいて、オリフイス径の
小さいオリフイスを有する側の系路内に急速排出
弁を設け、この系路に接続された圧力−変位変換
機構を非動作状態に復帰させる必要が生じたとき
に、切換弁を切換えるか、あるいは電磁弁を停止
させることにより、この系路内の圧力を瞬時に開
放することが可能であり、これによつて圧力−変
位変換機構の復帰はすみやかに行われる。また急
速排出弁の動作は圧力の変化に応じて自動的に行
われるので、電磁弁を使用する場合と比べて構造
が簡略であり、誤動作の危険性もきわめて少な
い。 As described above, according to this invention, in a hydraulic actuator that displaces a plurality of pressure-displacement conversion mechanisms by the pressure in two systems having orifices with different orifice diameters, the orifice has an orifice with a small orifice diameter. A quick discharge valve is provided in the side system, and when it becomes necessary to return the pressure-displacement conversion mechanism connected to this system to a non-operating state, the switching valve is switched or the solenoid valve is stopped. This makes it possible to instantly release the pressure in this system, thereby allowing the pressure-displacement converting mechanism to return quickly. Furthermore, since the quick discharge valve operates automatically in response to changes in pressure, the structure is simpler than in the case of using a solenoid valve, and the risk of malfunction is extremely low.
第１図はこの考案の一実施例による油圧アクチ
エータの構成を示す油圧回路図、第２図ａおよび
第２図ｂは第１図の油圧アクチエータに用いられ
た急速排出弁を互いに異なつた状態にあるものと
して示す縦断面図である。
１…オイルタンク、２…油圧ポンプ、３，４…
圧力−変位変換機構、５…電磁三方弁、６…チエ
ツク弁、７，８…オリフイス、９，１０，１１，
１２…系路、１３…急速排出弁、１４…系路、１
５…弁体、１６…弁室、１７，１８，１９…通
路。
Fig. 1 is a hydraulic circuit diagram showing the configuration of a hydraulic actuator according to an embodiment of this invention, and Figs. 2a and 2b show the quick discharge valve used in the hydraulic actuator of Fig. 1 in different states. It is a longitudinal sectional view shown as being. 1...Oil tank, 2...Hydraulic pump, 3, 4...
Pressure-displacement conversion mechanism, 5... solenoid three-way valve, 6... check valve, 7, 8... orifice, 9, 10, 11,
12... System line, 13... Rapid discharge valve, 14... System line, 1
5... Valve body, 16... Valve chamber, 17, 18, 19... Passage.
Claims (1)
流量で吐出する油圧ポンプと、この油圧ポンプか
ら吐出された作動油を上記オイルタンクに戻す過
程で、各々に設けたオリフイスのオリフイス径に
応じた油圧を発生させる第１および第２の系路
と、上記第１の系路内に発生した第１の圧力で動
作する第１の圧力−変位変換機構と、上記第２の
系路内に発生した上記第１の圧力よりも高い第２
の圧力で動作する第２の圧力−変位変換機構と、
上記第１および第２の系路のいずれか一方を選択
して上記油圧ポンプからの作動油を供給する切換
弁機構と、上記第２の系路内に挿入された急速排
出弁とを備え、上記急速排出弁は、上記切換弁機
構側に連なる第１の通路と、上記オイルタンクに
連通する第２の通路のいずれか一方を閉じるよう
に弁室内で移動可能であり、かつ上記第１の通路
内の圧力が上記オリフイス側に連なる第３の通路
内の圧力よりも高いときには上記第２の通路の開
口を閉じ、また上記第３の通路内の圧力が上記第
１の通路内の圧力よりも高いときには上記第１の
通路の開口を閉じるように移動する弁体を有して
いる油圧アクチエータ。 A hydraulic pump discharges hydraulic oil sucked from an oil tank at a predetermined constant flow rate, and in the process of returning the hydraulic oil discharged from this hydraulic pump to the oil tank, hydraulic pressure is applied according to the orifice diameter of the orifice provided in each. a first pressure-displacement conversion mechanism that operates with the first pressure generated in the first system; and a first pressure-displacement conversion mechanism that operates with the first pressure generated in the second system; The second pressure is higher than the first pressure.
a second pressure-displacement conversion mechanism that operates at a pressure of
comprising a switching valve mechanism that selects either one of the first and second systems to supply hydraulic oil from the hydraulic pump; and a quick discharge valve inserted into the second system; The quick discharge valve is movable within the valve chamber so as to close either one of a first passage communicating with the switching valve mechanism side and a second passage communicating with the oil tank, and When the pressure in the passage is higher than the pressure in the third passage connected to the orifice side, the opening of the second passage is closed, and the pressure in the third passage is higher than the pressure in the first passage. The hydraulic actuator has a valve body that moves to close the opening of the first passage when the temperature is high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16727483U JPS6073909U (en) | 1983-10-27 | 1983-10-27 | hydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16727483U JPS6073909U (en) | 1983-10-27 | 1983-10-27 | hydraulic actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6073909U JPS6073909U (en) | 1985-05-24 |
| JPH0134723Y2 true JPH0134723Y2 (en) | 1989-10-23 |
Family
ID=30365996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16727483U Granted JPS6073909U (en) | 1983-10-27 | 1983-10-27 | hydraulic actuator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6073909U (en) |
-
1983
- 1983-10-27 JP JP16727483U patent/JPS6073909U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6073909U (en) | 1985-05-24 |
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