JPS6230321B2 - - Google Patents
Info
- Publication number
- JPS6230321B2 JPS6230321B2 JP56189901A JP18990181A JPS6230321B2 JP S6230321 B2 JPS6230321 B2 JP S6230321B2 JP 56189901 A JP56189901 A JP 56189901A JP 18990181 A JP18990181 A JP 18990181A JP S6230321 B2 JPS6230321 B2 JP S6230321B2
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- actuator
- hydraulic oil
- pressure
- stroke zone
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、油圧アクチユエータを所定ストロー
ク内で短時間の間に加減速制御して作動させる油
圧アクチユエータ作動装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a hydraulic actuator actuator that operates a hydraulic actuator by controlling acceleration and deceleration within a predetermined stroke for a short period of time.
（従来の技術）
従来のこの種油圧アクチユエータ作動装置とし
ては、第１図に示すように、油圧アクチユエータ
１とシリンダ式油圧ポンプ４とを管路８で作動媒
体油が行ききするように直結するものが考えられ
る。(Prior Art) As shown in FIG. 1, a conventional hydraulic actuator actuating device of this type connects a hydraulic actuator 1 and a cylinder type hydraulic pump 4 directly through a conduit 8 so that the working medium oil flows therethrough. I can think of things.
（発明が解決しようとする問題点及び目的）
第１図に示す油圧アクチユエータ作動装置では
通常作動時、作動油は回転カム５′にて作動され
るシリンダ式油圧ポンプ４と油圧アクチユエータ
１の往動室６との管に封じ込められており、両者
間を行ききするだけであるから比較的短時間の作
動で劣化する。 (Problems and Objectives to be Solved by the Invention) In the hydraulic actuator actuating device shown in FIG. 1, during normal operation, hydraulic oil is pumped between the cylinder type hydraulic pump 4 operated by the rotary cam 5' and the hydraulic actuator 1. Since it is sealed in a pipe with the chamber 6 and only goes between the two, it deteriorates in a relatively short period of time.
即わち潤滑性能が悪くなる。作動油が劣化する
と、各機械部品の摩耗を若起し、特にシール部品
が摩耗すると油漏れが発生するので油圧アクチユ
エータは往動時に所定ストローク作動ができなく
なる。 That is, the lubrication performance deteriorates. When the hydraulic oil deteriorates, it causes premature wear on various mechanical parts, and especially when the seal parts wear out, oil leaks occur, making it impossible for the hydraulic actuator to perform a predetermined stroke operation during forward movement.
ところで、封入されている作動油を新しい作動
油と入れかえると作動油の劣化による上記不都合
は解消されるが、作動油は封入されているためそ
の入換えに当つては回転カムによる油圧ポンプ作
動状態のもとで油圧アクチユエータを強制的に停
止しなければならず、稼動効率が損なわれる欠点
がある。 By the way, if you replace the sealed hydraulic oil with new hydraulic oil, the above-mentioned problems caused by the deterioration of the hydraulic oil will be resolved, but since the hydraulic oil is sealed, when replacing it, the operating state of the hydraulic pump by the rotating cam must be changed. The hydraulic actuator must be forcibly stopped under such conditions, which has the disadvantage of impairing operating efficiency.
本発明は上記の欠点を解消するためになされた
もので、作動油の入換えが装置作動中に自動的に
行なえるようにしたものである。 The present invention has been made to solve the above-mentioned drawbacks, and is designed to automatically replace the hydraulic oil during operation of the device.
（本発明による解決手段及び作用）
油圧アクチユエータと、該油圧アクチユエータ
の往動室に管路で作動媒体油がゆききするように
直結され、且つ、前記往動室より大きい容積を有
するシリンダ式油圧ポンプと、該油圧ポンプを作
動させる回転カムと、前記管路に配管連結される
リリーフバルブ並びに前記油圧アクチユエータの
復動中の管路内圧力より低い圧力の作動油を逆止
弁を介して流入付勢するようにしてなる低圧作動
油補給装置を備え、而して前記回転カムにはアク
チユエータ往動ストロークゾーンと作動油リリー
フストロークゾーンとアクチユエータ復動ストロ
ークゾーンと作動油補給ストロークゾーンとをこ
の順で一連に形成した。そして、油圧アクチユエ
ータとシリンダ式油ポンプとの間に封じ込められ
たアクチユエータ作動媒体油を油圧アクチユエー
タの往動後に強制的にリリーフさせ、又、復動後
に補給するようにした。(Solution Means and Effects According to the Present Invention) A hydraulic actuator and a cylindrical hydraulic system that is directly connected to a forward movement chamber of the hydraulic actuator so that a working medium oil flows through a conduit, and that has a larger volume than the forward movement chamber. A pump, a rotary cam that operates the hydraulic pump, a relief valve connected to the pipe line, and hydraulic oil having a pressure lower than the pressure in the pipe line during the return movement of the hydraulic actuator is inflowed through the check valve. A low-pressure hydraulic oil replenishment device configured to energize the rotary cam is provided, and the rotary cam has an actuator forward stroke zone, a hydraulic oil relief stroke zone, an actuator backward stroke zone, and a hydraulic oil replenishment stroke zone in this order. was formed in series. The actuator working medium oil trapped between the hydraulic actuator and the cylinder type oil pump is forcibly relieved after the forward movement of the hydraulic actuator, and is replenished after the backward movement.
（実施例）
以下、その実施例を図面について説明すると、
第２図において、図中１は油圧アクチユエータで
その復動室２には蓄圧器３が配管連結されてい
る。４はシリンダ式油圧ポンプ、５はシリンダ式
油圧ポンプ４を作動させる回転カムで、その曲周
面に、アクチユエータ往動ストロークゾーンＡ−
Ｂと作動油リリーフトロークゾーンＢ−Ｃとアク
チユエータ復動ストロークゾーンＣ−Ｄと作動油
補給ストロークゾーンＤ−Ａとがこの順で一連に
形成されている。(Example) Below, the example will be explained with reference to the drawings.
In FIG. 2, reference numeral 1 denotes a hydraulic actuator, and a pressure accumulator 3 is connected via piping to a reciprocating chamber 2 of the hydraulic actuator. 4 is a cylinder type hydraulic pump, and 5 is a rotary cam that operates the cylinder type hydraulic pump 4, and the actuator forward stroke zone A- is provided on its curved surface.
B, hydraulic oil relief stroke zone B-C, actuator double stroke zone CD, and hydraulic oil replenishment stroke zone D-A are formed in series in this order.
前記油圧アクチユエータ１の往動室６と該往動
室より大きい容積を有するシリンダ式油圧ポンプ
４のシリンダ室７とは管路８で作動油が行ききす
るように直結されている。この管路８の両端近傍
部にはリリーフバルブ９を介装する管路１０と低
圧作動油補給装置１１を介装する管路１２とがそ
れぞれ連結されている。 The reciprocating chamber 6 of the hydraulic actuator 1 and the cylinder chamber 7 of the cylinder type hydraulic pump 4, which has a larger volume than the reciprocating chamber, are directly connected through a conduit 8 so that hydraulic oil flows therethrough. A pipe line 10 in which a relief valve 9 is interposed and a pipe line 12 in which a low-pressure hydraulic oil supply device 11 is interposed are connected to the vicinity of both ends of the pipe line 8, respectively.
前記低圧作動油補給装置１１は下記した構造と
なつている。即わち、エヤ室１３と作動油１４と
に２分されたシリンダ式蓄圧器１５と、該蓄圧器
１５の作動油室１４に作動油を送り込むエヤ作動
式油圧ポンプ１６とが管路１７で連結されており
この管路１７が逆止弁１８を介して前記管路１２
に連通されている。そして、エヤ作動式油圧ポン
プ１６並びに蓄圧器１５のエヤ室１３とエヤ源１
９とは、エヤ作動式油圧ポンプ１６が源圧弁２
０，２ポート式電磁弁２１をエヤ源１９からこの
順に介装する管路２２で連結されており、又蓄圧
器１５のエヤ室１３が減圧弁２０、２ポート式電
磁弁２１間の管路から分岐させた管路２３で連結
されている。２４ａ，２４ｂは前記シリンダ式畜
圧器１５のピストンロツド２５の側方に配設され
た検出器である。両検出器２４ａ，２４ｂと前記
２ポート式電磁弁２１とは回線２６でインタロツ
クされており、検出器２４ｂがピストンロツド２
５下端を検出すると電磁弁２１がONされて切換
わり、圧力エヤが油圧ポンプ１６に流入され油圧
ポンプ１６が起動されて作動油を蓄圧器１５に送
り込む。又、検出器２４ａがピストンロツド２５
下端を検出すると電磁弁２１がOFFされ管路が
遮断されて油圧ポンプ１６が停止されるようにな
つている。そして前記畜圧器１５の作動油室１４
内圧力は油圧アクチユエータ１に接続されている
蓄圧器３内の圧力により復動作動する時の管路
８，１２内圧力よりも低い圧力に調整され、又、
リリーフバルブ９の設定圧は油圧アクチユエータ
１の通常往動油圧力より高い圧力とされている。 The low pressure hydraulic oil supply device 11 has the following structure. That is, a cylinder type pressure accumulator 15 divided into two parts, an air chamber 13 and a hydraulic oil chamber 14 , and an air-operated hydraulic pump 16 that feeds hydraulic oil into the hydraulic oil chamber 14 of the pressure accumulator 15 are connected by a conduit 17 . The pipe line 17 is connected to the pipe line 12 via a check valve 18.
is communicated with. The air-operated hydraulic pump 16 and the air chamber 13 of the pressure accumulator 15 and the air source 1
9 means that the air-operated hydraulic pump 16 is connected to the source pressure valve 2.
The air chamber 13 of the pressure accumulator 15 is connected to the pressure reducing valve 20 and the two-port solenoid valve 21 through a pipe line 22 that connects the air source 19 to the two-port solenoid valve 21 in this order. They are connected by a conduit 23 branched from. Detectors 24a and 24b are arranged on the sides of the piston rod 25 of the cylinder pressure accumulator 15. Both detectors 24a, 24b and the two-port solenoid valve 21 are interlocked via a line 26, and the detector 24b is connected to the piston rod 2.
When the lower end of 5 is detected, the solenoid valve 21 is turned on and switched, pressure air flows into the hydraulic pump 16, the hydraulic pump 16 is activated, and hydraulic oil is sent to the pressure accumulator 15. Also, the detector 24a is connected to the piston rod 25.
When the lower end is detected, the solenoid valve 21 is turned off, the pipeline is cut off, and the hydraulic pump 16 is stopped. And the hydraulic oil chamber 14 of the pressure accumulator 15
The internal pressure is adjusted to a pressure lower than the internal pressure of the pipes 8 and 12 during the reverse operation by the pressure in the pressure accumulator 3 connected to the hydraulic actuator 1, and
The set pressure of the relief valve 9 is higher than the normal forward hydraulic pressure of the hydraulic actuator 1.
（作 用）
本発明はこのように構成されているので、油圧
アクチユエータ１の作動並びに油圧アクチユエー
タ１、シリンダ式油圧ポンプ４間に封じ込められ
ている作動油の入換えは次のようにして行なわれ
る。(Function) Since the present invention is configured as described above, the operation of the hydraulic actuator 1 and the replacement of the hydraulic oil sealed between the hydraulic actuator 1 and the cylinder type hydraulic pump 4 are performed as follows. .
即わち、図外駆動装置の作動で回転カム５を矢
印方向に回転させると、油圧ポンプ４のピストン
４′はローラ２７を介して接当している回転カム
５によつて押されてシリンダ室７から作動油を吐
出する。この作動油は管路８を通つて油圧アクチ
ユエータ１の往動室６に流入してピストン１′を
所定ストロークまで即わちシリンダ壁に接当する
まで動かす。この時、油圧アクチユエータ１の復
動室２内作動油は順次押し出されて蓄圧器３に流
入し蓄圧される。 That is, when the rotary cam 5 is rotated in the direction of the arrow by the operation of the drive device (not shown), the piston 4' of the hydraulic pump 4 is pushed by the rotary cam 5 that is in contact with the cylinder through the roller 27. Hydraulic oil is discharged from chamber 7. This hydraulic oil flows into the reciprocating chamber 6 of the hydraulic actuator 1 through the conduit 8 and moves the piston 1' to a predetermined stroke, that is, until it comes into contact with the cylinder wall. At this time, the hydraulic fluid in the reciprocating chamber 2 of the hydraulic actuator 1 is sequentially pushed out and flows into the pressure accumulator 3, where the pressure is accumulated.
回転カム５がアクチユエータ往動ストロークゾ
ーンＡ−Ｂを越えて更に回転されると、油圧ポン
プ４のピストン４′は一層押されてシリンダ室７
から作動油を吐出する。この作動油は油圧アクチ
ユエータ１のピストン１′が既にストロークエン
ドまで移動しているのでアクチユエータ往動室６
に流入されず、管路８→管路１０を通つてリリー
フバルブ９にてリリーフされてタンクに返戻され
る。 When the rotating cam 5 is further rotated beyond the actuator forward stroke zone A-B, the piston 4' of the hydraulic pump 4 is pushed further and the cylinder chamber 7
Discharge hydraulic oil from. Since the piston 1' of the hydraulic actuator 1 has already moved to the stroke end, this hydraulic fluid is in the actuator forward movement chamber 6.
Instead, it passes through the pipe line 8 → pipe line 10, is relieved at the relief valve 9, and is returned to the tank.
回転カム５が更に回転されてアクチユエータ復
動ストロークゾーンＣ−Ｄに入ると、往動時に蓄
圧された作動油が蓄圧器３から吐出されアクチユ
エータ復動室２に流入されてアクチユエータ１の
ピストン１′を押し戻す。この時、アクチユエー
タ１の往動室６内作動油はピストン１′の押戻動
によつて該室６から吐出され、管路８を通つて油
圧ポンプ４内に戻される。 When the rotary cam 5 is further rotated and enters the actuator double movement stroke zone C-D, the hydraulic oil accumulated during the forward movement is discharged from the pressure accumulator 3 and flows into the actuator double movement chamber 2, and the piston 1' of the actuator 1 is Push back. At this time, the hydraulic oil in the reciprocating chamber 6 of the actuator 1 is discharged from the chamber 6 by the pushing back movement of the piston 1' and is returned into the hydraulic pump 4 through the conduit 8.
更に、回転カム５が回転されて作動油補給スト
ロークゾーンＤ−Ａに入ると、低圧作動油補給装
置１１から送出された低圧作動油が管路１２→管
路８を通つて油圧ポンプ４内に補給されると共に
この補給された作動油の圧力で油圧ポンプ４のピ
ストン４′が押し出され、カム曲周面に対する接
当状態が維持される。 Further, when the rotary cam 5 is rotated and enters the hydraulic oil replenishment stroke zone D-A, the low pressure hydraulic oil sent from the low pressure hydraulic oil replenishment device 11 passes through the pipe 12 → pipe 8 and enters the hydraulic pump 4. At the same time, the piston 4' of the hydraulic pump 4 is pushed out by the pressure of the supplied hydraulic oil, and the state of contact with the curved peripheral surface of the cam is maintained.
以後、同操作が繰り返される。油圧アクチユエ
ータ１・油圧ポンプ４間に封じ込められている作
動油は上記操作の反復によつて同時に、わずかず
つでわあるが循環され入れかえられるのである。
従つて、作動油の入換えは装置を停止することな
く自動的に行なえ、作動油劣化を効果的に防止で
きるのである。 Thereafter, the same operation is repeated. By repeating the above operation, the hydraulic fluid confined between the hydraulic actuator 1 and the hydraulic pump 4 is simultaneously circulated and replaced, albeit slightly.
Therefore, the hydraulic oil can be replaced automatically without stopping the device, and deterioration of the hydraulic oil can be effectively prevented.
尚、上記実施例では、油圧アクチユエータ１の
復動操作を蓄圧器３の蓄圧油で行うようにしてい
るが、第４，５図に示す如くアクチユエータ１に
バネ２８やエヤシリンダ２９を組み込んでおき、
その蓄力によつて復動操作するようにしてもよ
い。又、上記実施例では、シリンダ式蓄圧器１５
に蓄圧された低圧作動油を油圧ポンプ４に補給す
るよにしているが第６図に示す如く、モータ駆動
の油圧ポンプから常時吐出されている低圧作動油
を補給するようにしてもよい。 Incidentally, in the above embodiment, the backward movement operation of the hydraulic actuator 1 is performed using the pressure accumulated oil in the pressure accumulator 3, but as shown in FIGS.
A double movement operation may be performed using the accumulated power. Further, in the above embodiment, the cylinder type pressure accumulator 15
Although the hydraulic pump 4 is supplied with low-pressure hydraulic oil accumulated in the hydraulic pump 4, it is also possible to supply low-pressure hydraulic oil constantly discharged from a motor-driven hydraulic pump, as shown in FIG.
（効 果）
以上のように本発明によると、油圧アクチユエ
ータ・シリンダ式油圧ポンプ間に封じこめられて
使用されている作動油を、わずかづつではあるが
新規作動油と入換えることができるので作動油の
劣化による不具合いを一掃することができる他、
作動油入換えを装置作動中に自動的に行うので装
置を停止して行う場合に比べて装置の稼動効率が
大巾に向上でき、又、作動油の劣化程度の計測監
視作業も不要となる等多大の効果を有する。(Effects) As described above, according to the present invention, the hydraulic oil trapped between the hydraulic actuator and the cylinder-type hydraulic pump can be replaced with new hydraulic oil little by little, thereby preventing deterioration of the hydraulic oil. In addition to being able to eliminate problems caused by
Since the hydraulic oil is replaced automatically while the equipment is operating, the operating efficiency of the equipment can be greatly improved compared to when replacing the equipment while the equipment is stopped, and there is no need to measure and monitor the degree of deterioration of the hydraulic oil. It has many effects.
第１図は油圧アクチユエータ作動装置の概念
図、第２図は本発明に係る油圧アクチユエータ作
動装置を示す図、第３図は回転カムのストローク
角度線図第４，５図は油圧アクチユエータ復動機
構の変形例を示す図、第６図は低圧作動油補給装
置の変形例を示す図である。
１……油圧アクチユエータ、４……シリンダ式
油圧ポンプ、５……回転カム、６……往動室、８
……管路、９……リリーフバルブ、１１……低圧
作動油補給装置、Ａ−Ｂ……アクチユエータ往動
ストロークゾーン、Ｂ−Ｃ……作動リリーフスト
ロークゾーン、Ｃ−Ｄ……アクチユエータ復動ス
トロークゾーン、Ｄ−Ａ……作動油補給ストロー
ク。
Fig. 1 is a conceptual diagram of a hydraulic actuator actuating device, Fig. 2 is a diagram showing a hydraulic actuator actuating device according to the present invention, Fig. 3 is a stroke angle diagram of a rotating cam, and Figs. 4 and 5 are a hydraulic actuator return mechanism. FIG. 6 is a diagram showing a modification of the low-pressure hydraulic oil supply device. 1... Hydraulic actuator, 4... Cylinder type hydraulic pump, 5... Rotating cam, 6... Forward movement chamber, 8
... Pipe line, 9 ... Relief valve, 11 ... Low pressure hydraulic oil supply device, A-B ... Actuator forward stroke zone, B-C ... Operation relief stroke zone, C-D ... Actuator return stroke Zone, D-A...Hydraulic oil replenishment stroke.
Claims (1)
タの往動室に管路で作動媒体油が行ききするよう
に直結され且つ、前記往動室より大きい容積を有
するシリンダ式油圧ポンプと、該油圧ポンプを作
動させる回転カムと、前記管路に配管連結される
リリーフバルブ並びに前記油圧アクチユエータの
復動作動中の管路内圧力より低い圧力の作動油を
逆止弁を介して流入付勢するようにしてなる低圧
作動油補給装置を備え、而して前記回転カムには
アクチユエータ往動ストロークゾーンと作動油リ
リーフストロークゾーンとアクチユエータ復動ス
トロークゾーンと作動油補給ストロークゾーンと
がこの順で一連に形成されていることを特徴とす
る油圧アクチユエータ作動装置。1. A hydraulic actuator, a cylinder type hydraulic pump which is directly connected to a forward movement chamber of the hydraulic actuator so that working medium oil flows through a pipe and has a larger volume than the forward movement chamber, and operates the hydraulic pump. A rotary cam, a relief valve connected to the pipeline, and a low pressure system configured to urge hydraulic fluid at a pressure lower than the internal pressure of the pipeline to flow in through the check valve during the double operation of the hydraulic actuator. A hydraulic oil replenishment device is provided, and the rotary cam has an actuator forward stroke zone, a hydraulic oil relief stroke zone, an actuator backward stroke zone, and a hydraulic oil replenishment stroke zone formed in series in this order. A hydraulic actuator actuation device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18990181A JPS5894601A (en) | 1981-11-28 | 1981-11-28 | Hydraulic actuator operating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18990181A JPS5894601A (en) | 1981-11-28 | 1981-11-28 | Hydraulic actuator operating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5894601A JPS5894601A (en) | 1983-06-04 |
| JPS6230321B2 true JPS6230321B2 (en) | 1987-07-01 |
Family
ID=16249087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18990181A Granted JPS5894601A (en) | 1981-11-28 | 1981-11-28 | Hydraulic actuator operating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5894601A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5413881A (en) * | 1977-07-04 | 1979-02-01 | Babcock Hitachi Kk | Indirect driving process and its apparatus |
-
1981
- 1981-11-28 JP JP18990181A patent/JPS5894601A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5894601A (en) | 1983-06-04 |
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