JPH0373705U - - Google Patents
Info
- Publication number
- JPH0373705U JPH0373705U JP13475489U JP13475489U JPH0373705U JP H0373705 U JPH0373705 U JP H0373705U JP 13475489 U JP13475489 U JP 13475489U JP 13475489 U JP13475489 U JP 13475489U JP H0373705 U JPH0373705 U JP H0373705U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- variable throttle
- valve spool
- valve
- spool
- 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.)
- Granted
Links
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000007935 neutral effect Effects 0.000 claims 1
- 230000001603 reducing effect Effects 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Safety Valves (AREA)
Description
第1図は本考案に係る流量調整弁の一実施例を
示す断面図、第2図は第1図に示す流量調整弁の
バルブスプールが図において右側へ移動された時
の状態を示す断面図、第3図は本考案に係る流量
調整弁の別の実施例を示す断面図、第4図は従来
の流量調整弁を示す断面図である。
10……バルブ本体、18……第1の可変絞り
(油穴)、20……第2の可変絞り(油穴)、3
0……バルブスプール、32……油穴、34,3
6……通油路、40……圧力補償手段、42……
スプリング室、44……流路室、46……圧力補
償ピストン、48……補助スプール、50……油
通路、52……油室、54……調圧スプリング、
56……スプリング、60……通油路、P……圧
油供給用コア、CA,CB……シリンダ用コア、
TA,TB……戻り油用コア、l……リフト量。
Fig. 1 is a sectional view showing an embodiment of the flow rate regulating valve according to the present invention, and Fig. 2 is a sectional view showing the state when the valve spool of the flow rate regulating valve shown in Fig. 1 is moved to the right side in the figure. 3 is a sectional view showing another embodiment of the flow rate regulating valve according to the present invention, and FIG. 4 is a sectional view showing a conventional flow rate regulating valve. 10... Valve body, 18... First variable throttle (oil hole), 20... Second variable throttle (oil hole), 3
0...Valve spool, 32...Oil hole, 34,3
6... Oil passage, 40... Pressure compensation means, 42...
Spring chamber, 44...Flow path chamber, 46...Pressure compensating piston, 48...Auxiliary spool, 50...Oil passage, 52...Oil chamber, 54...Pressure adjustment spring,
56... Spring, 60... Oil passage, P... Pressure oil supply core, CA, CB... Cylinder core,
TA, TB...core for return oil, l...lift amount.
Claims (1)
在に設けられ外部からの操作量に応じて移動する
中空のバルブスプールとからなり、前記バルブ本
体のハウジングにはバルブスプールの軸方向にお
ける中央部に圧油供給用コア、両側端部に戻り油
用コアおよび前記コアの間にそれぞれ油圧駆動ア
クチユエータに連通するシリンダ用コアを設け、
前記バルブスプールの壁部に対しては前記操作量
が零の中立状態の際、前記圧油供給用コアとシリ
ンダ用コアとの間およびシリンダ用コアと戻り油
用コアとの間に、バルブスプールの移動時にその
移動量に応じて開口面積を変化する第1の可変絞
りからなる油穴および第2の可変絞りからなる油
穴をそれぞれ開口してなる流量調整弁において、 前記バルブスプールの中空部内に、前記第2の
可変絞りの開口面積を制御し前記第1の可変絞り
前後の差圧を予め設定した差圧に調節する圧力補
償手段を、摺動自在に設けることを特徴とする流
量調整弁。 (2) 圧力補償手段は、両端部をそれぞれバルブ
スプール中空部の端部スプリング室ならびに中央
部流路室内に配設される圧力補償ピストンからな
り、この圧力補償ピストンはその内部に前記スプ
リング室内の圧力を制御する補助スプールと第1
の可変絞りの前後の差圧を設定する調圧スプリン
グとを備え、前記補助スプールの減圧作用により
前記圧力補償ピストンは前記調圧スプリングの設
定圧に対応して移動し第2の可変絞りの開口面積
を制御すると共に第1の可変絞りの上流側の圧力
以上の過負荷状態ではその高圧は前記スプリング
室に導入され、前記圧力補償ピストンを第2の可
変絞りの閉塞位置へ動作させるよう構成してなる
請求項1記載の流量調整弁。[Claims for Utility Model Registration] (1) Consisting of a valve body and a hollow valve spool that is slidably provided within the valve body and moves according to the amount of operation from the outside, The valve spool is provided with a core for supplying pressure oil at the center in the axial direction of the valve spool, cores for returning oil at both ends, and cylinder cores communicating with the hydraulically driven actuator between the cores, respectively,
With respect to the wall of the valve spool, when the operation amount is zero and the valve spool is in a neutral state, the valve spool is connected between the pressure oil supply core and the cylinder core and between the cylinder core and the return oil core. In the flow rate regulating valve, the oil hole is formed by a first variable throttle and the oil hole is opened by a second variable throttle, the opening area of which changes according to the amount of movement of the valve spool when the valve spool moves. The flow rate adjustment is characterized in that a pressure compensation means is slidably provided to control the opening area of the second variable throttle and adjust the differential pressure before and after the first variable throttle to a preset differential pressure. valve. (2) The pressure compensating means consists of a pressure compensating piston whose both ends are disposed within the end spring chamber and the central flow passage chamber of the hollow part of the valve spool. The auxiliary spool and the first
and a pressure regulating spring that sets a differential pressure before and after the variable throttle, and the pressure compensating piston moves in accordance with the set pressure of the pressure regulating spring due to the pressure reducing action of the auxiliary spool, thereby increasing the opening of the second variable throttle. The pressure compensation piston is configured to control the area, and in an overload condition exceeding the pressure upstream of the first variable throttle, the high pressure is introduced into the spring chamber and moves the pressure compensating piston to the closed position of the second variable throttle. 2. The flow rate regulating valve according to claim 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1989134754U JP2514159Y2 (en) | 1989-11-20 | 1989-11-20 | Flow control valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1989134754U JP2514159Y2 (en) | 1989-11-20 | 1989-11-20 | Flow control valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0373705U true JPH0373705U (en) | 1991-07-24 |
JP2514159Y2 JP2514159Y2 (en) | 1996-10-16 |
Family
ID=31682070
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1989134754U Expired - Lifetime JP2514159Y2 (en) | 1989-11-20 | 1989-11-20 | Flow control valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2514159Y2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11315807A (en) * | 1998-03-19 | 1999-11-16 | Linde Ag | Control valve |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5226325A (en) * | 1975-08-25 | 1977-02-26 | Hitachi Ltd | Production method of filter for exposure |
JPS59197603A (en) * | 1983-04-13 | 1984-11-09 | リンデ・アクチエンゲゼルシヤフト | Hydrostatic driving system |
JPS617521A (en) * | 1984-06-20 | 1986-01-14 | 松下電器産業株式会社 | Relay drive device |
-
1989
- 1989-11-20 JP JP1989134754U patent/JP2514159Y2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5226325A (en) * | 1975-08-25 | 1977-02-26 | Hitachi Ltd | Production method of filter for exposure |
JPS59197603A (en) * | 1983-04-13 | 1984-11-09 | リンデ・アクチエンゲゼルシヤフト | Hydrostatic driving system |
JPS617521A (en) * | 1984-06-20 | 1986-01-14 | 松下電器産業株式会社 | Relay drive device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11315807A (en) * | 1998-03-19 | 1999-11-16 | Linde Ag | Control valve |
JP4658274B2 (en) * | 1998-03-19 | 2011-03-23 | リンデ マテリアル ハンドリング ゲゼルシャフト ミット ベシュレンクテル ハフツング | Control valve |
Also Published As
Publication number | Publication date |
---|---|
JP2514159Y2 (en) | 1996-10-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EXPY | Cancellation because of completion of term |