JPS647361Y2 - - Google Patents
Info
- Publication number
- JPS647361Y2 JPS647361Y2 JP1981054417U JP5441781U JPS647361Y2 JP S647361 Y2 JPS647361 Y2 JP S647361Y2 JP 1981054417 U JP1981054417 U JP 1981054417U JP 5441781 U JP5441781 U JP 5441781U JP S647361 Y2 JPS647361 Y2 JP S647361Y2
- Authority
- JP
- Japan
- Prior art keywords
- pneumatic
- actuator
- valve
- motor
- electric
- 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
- 239000012530 fluid Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Fluid-Pressure Circuits (AREA)
- Control Of Water Turbines (AREA)
- Safety Devices In Control Systems (AREA)
Description
【考案の詳細な説明】
本考案は電動機を用いた電動アクチユエータを
停電時には所定位置に停止させるための流体式の
非常装置に関し、圧力流体の消費量軽減と確実な
停止を図つたものである。[Detailed Description of the Invention] The present invention relates to a fluid-type emergency device for stopping an electric actuator using an electric motor at a predetermined position in the event of a power outage, and is intended to reduce pressure fluid consumption and ensure reliable stopping.
電動機の回転駆動によりアクチユエータが動く
形式の電動アクチユエータでは、停電になると電
動機が働かなくなるので、停電時にはアクチユエ
ータをその負荷に応じた安全な位置に停止させる
必要がある。そのため、流体式の非常装置が使用
されている。第１図にこの種の非常装置の一従来
例を示す。この例は水車発電機用電動ガバナに用
いられている送りねじ式の電動アクチユエータに
ついての例であり、ベアリング１によつて支承さ
れたねじ軸２がトルクリミツタ３と減速機４を介
して電動機５の回転軸に連結されており、案内枠
６によつて直線運動可能に支承されたアクチユエ
ータ７がねじ軸２に螺合され、このアクチユエー
タ７に図示省略した水車のガイドベーンが直結さ
れている。更に電動機５には空圧モータ８が直結
され、この空圧モータ８と空圧タンク９間に電磁
弁１０（三方弁）が介設されている。この電磁弁
１０は非励磁時に空圧タンク９を空圧モータ８に
接続し、励磁時は空圧モータ８を空圧タンク９か
ら切離して消音器１１に接続するもので、常時は
励磁状態にされている。今、第１図中で実線の矢
印をガイドベーンの閉方向動作、破線の矢印をガ
イドベーンの開方向動作とすると、水車発電機で
は非常時にはガイドベーンを全閉状態とするのが
安全なので、停電時には電磁弁１０が非励磁とな
つて空圧モータ８が実線矢印方向即ちガイドベー
ンの閉方向に回転する。この空圧モータ８の作動
によりアクチユエータ７はストツパ６ｂに当接す
るまで戻され、空圧モータ８に空圧が供給されつ
づけることによりアクチユエータ７がその停止位
置に保持される。なお、第１図は非停電時の状態
を示し、また図中で、６ａは案内枠側の案内レー
ル、７ａはアクチユエータ側の案内溝、１２はベ
アリングの支持台、１３はスピードコントロー
ラ、１４と１５は減圧弁、１６は手動弁である。 In an electric actuator in which the actuator is moved by rotation of the electric motor, the electric motor will stop working if there is a power outage, so it is necessary to stop the actuator at a safe position depending on the load during a power outage. Therefore, fluid-based emergency equipment is used. FIG. 1 shows a conventional example of this type of emergency device. This example is about a feed screw type electric actuator used in an electric governor for a water turbine generator. An actuator 7 connected to the rotating shaft and supported for linear movement by a guide frame 6 is screwed onto the screw shaft 2, and a guide vane of a water turbine (not shown) is directly connected to the actuator 7. Further, a pneumatic motor 8 is directly connected to the electric motor 5, and a solenoid valve 10 (three-way valve) is interposed between the pneumatic motor 8 and the pneumatic tank 9. This solenoid valve 10 connects the pneumatic tank 9 to the pneumatic motor 8 when not energized, and disconnects the pneumatic motor 8 from the pneumatic tank 9 and connects it to the silencer 11 when energized, and is normally in the energized state. has been done. Now, if we assume that the solid arrow in Figure 1 indicates the guide vane's closing direction and the broken line arrow indicates the guide vane's opening direction, it is safe to keep the guide vane fully closed in an emergency with a water turbine generator. During a power outage, the solenoid valve 10 is de-energized and the pneumatic motor 8 rotates in the direction of the solid arrow, that is, in the direction in which the guide vane closes. By this operation of the pneumatic motor 8, the actuator 7 is returned until it comes into contact with the stopper 6b, and by continuing to supply pneumatic pressure to the pneumatic motor 8, the actuator 7 is held at its stop position. Note that FIG. 1 shows the state during a non-power outage, and in the figure, 6a is a guide rail on the guide frame side, 7a is a guide groove on the actuator side, 12 is a bearing support, 13 is a speed controller, and 14 is a guide rail on the guide frame side. 15 is a pressure reducing valve, and 16 is a manual valve.
しかし上述した従来の非常装置では、空圧モー
タ８が空圧を大きくリークさせることによりアク
チユエータ７の停止位置を保持するので、空圧タ
ンク９の容量で保持時間が決まることとなり、停
電によつて長時間保持させるには大容量の空圧タ
ンクを設けねばならず不経済であつた。しかも停
電の都度、空圧タンクを交換しなければならない
ことも多かつた。 However, in the above-mentioned conventional emergency device, the pneumatic motor 8 maintains the stop position of the actuator 7 by leaking a large amount of air pressure, so the holding time is determined by the capacity of the pneumatic tank 9. In order to hold it for a long time, a large-capacity pneumatic tank had to be provided, which was uneconomical. Moreover, the pneumatic tank often had to be replaced every time there was a power outage.
本考案は上記従来技術の欠点に鑑み、圧力流体
の少量の消費でアクチユエータの所定位置での停
止を確実に行える非常装置を提供することを目的
とする。以下、第２図を参照して本考案をその一
実施例とともに説明する。なお、第２図に示す実
施例は第１図の従来例に本考案を適用した例であ
る。したがつて、第２図中で第１図と同一部分に
は同一符号を付して説明の重複を省く。 SUMMARY OF THE INVENTION In view of the above drawbacks of the prior art, it is an object of the present invention to provide an emergency device that can reliably stop an actuator at a predetermined position with a small consumption of pressure fluid. Hereinafter, the present invention will be explained together with one embodiment thereof with reference to FIG. The embodiment shown in FIG. 2 is an example in which the present invention is applied to the conventional example shown in FIG. Therefore, the same parts in FIG. 2 as in FIG. 1 are given the same reference numerals to avoid redundant explanation.
第２図において、１７は空圧リミツトスイツチ
であり、ガイドベーンの全閉位置においてアクチ
ユエータ７の突起７ｂに当接されて動作するよう
に配置してある。この空圧リミツトスイツチ１７
は２つのパイロツト式空圧作動切換弁１９，２０
のパイロツト回路１８，１８ａに接続されてい
る。一方の空圧作動切換弁１９は電磁弁１０次段
の減圧弁１５と空圧モータ８間に介設され、空圧
リミツトスイツチ１７の動作によつて弁を閉じる
ものとなつている。他方の空圧作動切換弁２０は
逆に空圧リミツトスイツチ１７の動作によつて弁
を開くものであり、この空圧作動切換弁２０及び
電磁弁１０を介して空圧タンク９に空圧デイスク
ブレーキ２１が接続されている。この例では空圧
デイスクブレーキ２１のブレーキデイスク２１ａ
は減速機４の入力軸に装着してある。 In FIG. 2, reference numeral 17 denotes a pneumatic limit switch, which is arranged so as to be in contact with the protrusion 7b of the actuator 7 when the guide vane is in the fully closed position. This pneumatic limit switch 17
are two pilot-operated pneumatically operated switching valves 19, 20.
The pilot circuits 18 and 18a are connected to each other. One pneumatic operation switching valve 19 is interposed between the pressure reducing valve 15 next to the electromagnetic valve 10 and the pneumatic motor 8, and is closed by the operation of the pneumatic limit switch 17. The other pneumatic switching valve 20 is opened by the operation of the pneumatic limit switch 17, and the pneumatic disc brake is connected to the pneumatic tank 9 via this pneumatic switching valve 20 and the solenoid valve 10. 21 is connected. In this example, the brake disc 21a of the pneumatic disc brake 21
is attached to the input shaft of the reducer 4.
この空圧回路の動作は、まず、停電になると直
ちに電磁弁１０が非励磁となつて弁が開き空圧タ
ンク９からの空圧が空圧モータ８へ流れてアクチ
ユエータ７がガイドベーンの全閉位置へ戻され
る。ここまでは第１図の例と同じである。アクチ
ユエータ７がガイドベーン全閉の所定位置に至る
と、空圧リミツトスイツチ１７が動作し、一方の
空圧作動切換弁１９が閉じて空圧モータ８への空
圧供給が止まり、同時に他方の空圧作動切換弁２
０が開いて空圧デイスクブレーキ２１が動作しブ
レーキがかかつてアクチユエータ７がロツクされ
る。 The operation of this pneumatic circuit is as follows: When a power outage occurs, the solenoid valve 10 is immediately de-energized, the valve opens, and air pressure from the pneumatic tank 9 flows to the pneumatic motor 8, causing the actuator 7 to fully close the guide vane. returned to position. The process up to this point is the same as the example shown in FIG. When the actuator 7 reaches the predetermined position where the guide vane is fully closed, the pneumatic limit switch 17 operates, and one pneumatic actuated switching valve 19 closes, stopping the pneumatic supply to the pneumatic motor 8. At the same time, the other pneumatic Operation switching valve 2
0 opens, the pneumatic disc brake 21 operates, and when the brake is engaged, the actuator 7 is locked.
したがつてアクチユエータ７の停止を保持する
には空圧モータ８の大きなリークがなくなり、２
つの空圧作動切換弁１９，２０と空圧デイスクブ
レーキ２１の若干のリークで済み、リーク量は従
来の1/100程度に激減する。 Therefore, in order to keep the actuator 7 stopped, there is no large leak in the pneumatic motor 8, and 2
Only a small amount of leakage occurs from the two pneumatically operated switching valves 19 and 20 and the pneumatic disc brake 21, and the amount of leakage is drastically reduced to about 1/100 of the conventional amount.
なお、上記実施例は水車発電機用電動ガバナに
ついての例であるが、これに限らず本考案は電動
機を用た電動アクチユエータに全て適用でき、ま
た停電時のアクチユエータの停止位置は負荷の種
類に応じて決まる。更に、圧力流体は空圧の他に
油圧であつても良く、またブレーキの型式はデイ
スクブレーキの他ドラムブレーキでもかまわな
い。 Although the above embodiment is an example of an electric governor for a water turbine generator, the present invention is not limited to this and can be applied to any electric actuator using an electric motor, and the stopping position of the actuator during a power outage depends on the type of load. It depends. Further, the pressure fluid may be hydraulic pressure in addition to pneumatic pressure, and the type of brake may be a drum brake instead of a disc brake.
第１図は従来例を示す空圧回路図、第２図は第
１図の例に適用した本考案の一実施例を示す空圧
回路図である。
図面中、２はねじ軸、５は電動機、６は案内
枠、７はアクチユエータ、８は空圧モータ、９は
空圧タンク、１０は電磁弁、１７は空圧リミツト
スイツチ、１９と２０は空圧作動切換弁、２１は
空圧デイスクブレーキである。
FIG. 1 is a pneumatic circuit diagram showing a conventional example, and FIG. 2 is a pneumatic circuit diagram showing an embodiment of the present invention applied to the example of FIG. In the drawing, 2 is a screw shaft, 5 is an electric motor, 6 is a guide frame, 7 is an actuator, 8 is a pneumatic motor, 9 is a pneumatic tank, 10 is a solenoid valve, 17 is a pneumatic limit switch, 19 and 20 are pneumatic pressure The operation switching valve 21 is a pneumatic disc brake.
Claims (1)
転軸に連結されアクチユエータを所定の位置へ戻
す方向の回転を与える流体圧モータと、この流体
圧モータと圧力流体タンクを接続する接続路に介
設され停電によつて開く電磁弁と、アクチユエー
タが所定の位置に至ると動作するように設けた流
体式のリミツトスイツチと、前記電磁弁と流体圧
モータ間に介設され前記リミツトスイツチの動作
によつて閉じる第１の弁と、電動アクチユエータ
の回転軸に対して設けられた流体圧ブレーキと、
前記電磁弁と第１の弁との間からこの流体圧ブレ
ーキへ至る接続路に介設され前記リミツトスイツ
チの動作によつて開く第２の弁とからなる電動ア
クチユエータ用非常装置。 A fluid pressure motor is connected to the rotating shaft of an electric actuator whose drive source is an electric motor and rotates the actuator in the direction of returning it to a predetermined position, and a connection path that connects this fluid pressure motor and a pressure fluid tank is installed. a solenoid valve that opens when the actuator reaches a predetermined position; a fluid-type limit switch that operates when the actuator reaches a predetermined position; a valve, a fluid pressure brake provided on the rotating shaft of the electric actuator,
An emergency device for an electric actuator, comprising a second valve interposed in a connecting path from the electromagnetic valve and the first valve to the hydraulic brake and opened by the operation of the limit switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981054417U JPS647361Y2 (en) | 1981-04-17 | 1981-04-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981054417U JPS647361Y2 (en) | 1981-04-17 | 1981-04-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57170404U JPS57170404U (en) | 1982-10-27 |
| JPS647361Y2 true JPS647361Y2 (en) | 1989-02-28 |
Family
ID=29851013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981054417U Expired JPS647361Y2 (en) | 1981-04-17 | 1981-04-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS647361Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0747601Y2 (en) * | 1987-03-09 | 1995-11-01 | トヨタ自動車株式会社 | Pressure assurance device in air cylinder |
| US9903395B2 (en) * | 2016-02-24 | 2018-02-27 | Mac Valves, Inc. | Proportional pressure controller with isolation valve assembly |
-
1981
- 1981-04-17 JP JP1981054417U patent/JPS647361Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57170404U (en) | 1982-10-27 |
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