JPH01158579U - - Google Patents
Info
- Publication number
- JPH01158579U JPH01158579U JP15204188U JP15204188U JPH01158579U JP H01158579 U JPH01158579 U JP H01158579U JP 15204188 U JP15204188 U JP 15204188U JP 15204188 U JP15204188 U JP 15204188U JP H01158579 U JPH01158579 U JP H01158579U
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- discharge
- control valve
- rate
- valve
- 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
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Landscapes
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の一実施例をポンプ構造と共に
示した油圧回路図、第２図は第１図に用いる可変
吐出量ベーンポンプのシンボル図、第３，４図は
本考案の他の実施例を示した油圧回路図である。
１：可変吐出量ベーンポンプ、１ａ：制御アク
チユエータ、１ｂ：復旧用アクチユエータ、２：
ロータ、３：ベーン、４：カムリング、５，１４
：スプリング、６，７：プランジヤ、６ａ：小径
プランジヤ、７ａ：鍔、８：スラストブロツク、
９：ストツパ部材、１０：流出口、１１：主管路
、１２：流量制御弁、１３：ロードセンシング弁
、１５：絞り、１６：タンク、１８：差圧保持弁
。
Fig. 1 is a hydraulic circuit diagram showing one embodiment of the present invention together with the pump structure, Fig. 2 is a symbol diagram of the variable displacement vane pump used in Fig. 1, and Figs. 3 and 4 are other embodiments of the present invention. FIG. 1: Variable discharge amount vane pump, 1a: Control actuator, 1b: Recovery actuator, 2:
Rotor, 3: Vane, 4: Cam ring, 5, 14
: Spring, 6, 7: Plunger, 6a: Small diameter plunger, 7a: Tsuba, 8: Thrust block,
9: Stopper member, 10: Outlet, 11: Main pipe, 12: Flow rate control valve, 13: Load sensing valve, 15: Throttle, 16: Tank, 18: Differential pressure holding valve.
Claims (1)
ードセンシング弁からの制御油圧の供給により設
定流量となるように吐出量を制御される可変吐出
量ポンプを用いた油圧制御装置に於いて、 前記可変吐出量ポンプは、前記流量制御弁によ
る設定流量が所定値以下のとき吐出量を所定量に
固定し、設定流量が上記所定値を上回つたときに
は、設定流量に応じて吐出量を可変にする吐出量
制御アクチユエータを備え、 前記流量制御弁の設定流量を前記可変吐出量ポ
ンプの最低吐出量以下に絞つた時に該流量制御弁
の前後差圧を一定値に保つように流量制御弁への
吐出ラインの液圧をタンクに排出する差圧保持弁
を設けた特徴とする油圧制御装置。[Scope of Claim for Utility Model Registration] Hydraulic pressure using a variable discharge rate pump whose discharge rate is controlled to a set flow rate by supplying control hydraulic pressure from a load sensing valve that operates based on the differential pressure generated in the flow rate control valve. In the control device, the variable discharge amount pump fixes the discharge amount to a predetermined amount when the flow rate set by the flow rate control valve is below a predetermined value, and fixes the discharge amount to the set flow rate when the set flow rate exceeds the predetermined value. and a discharge rate control actuator that varies the discharge rate accordingly, and maintains a differential pressure across the flow rate control valve at a constant value when the set flow rate of the flow rate control valve is reduced to a minimum discharge rate of the variable discharge rate pump or less. A hydraulic control device characterized by being provided with a differential pressure holding valve that discharges hydraulic pressure in a discharge line to a flow rate control valve into a tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15204188U JPH0332793Y2 (en) | 1988-11-22 | 1988-11-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15204188U JPH0332793Y2 (en) | 1988-11-22 | 1988-11-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01158579U true JPH01158579U (en) | 1989-11-01 |
| JPH0332793Y2 JPH0332793Y2 (en) | 1991-07-11 |
Family
ID=31426619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15204188U Expired JPH0332793Y2 (en) | 1988-11-22 | 1988-11-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0332793Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005090749A (en) * | 2003-09-18 | 2005-04-07 | Sauer Danfoss Inc | Open circuit hydraulic transmission device comprising automatic pressure compensation remote equipment |
| WO2008022672A1 (en) * | 2006-08-21 | 2008-02-28 | Joma-Hydromechanic Gmbh | Feed pump |
-
1988
- 1988-11-22 JP JP15204188U patent/JPH0332793Y2/ja not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005090749A (en) * | 2003-09-18 | 2005-04-07 | Sauer Danfoss Inc | Open circuit hydraulic transmission device comprising automatic pressure compensation remote equipment |
| WO2008022672A1 (en) * | 2006-08-21 | 2008-02-28 | Joma-Hydromechanic Gmbh | Feed pump |
| KR101229173B1 (en) * | 2006-08-21 | 2013-02-01 | 조마 폴리텍 쿤스츠토프테닉 게엠바하 | Feed pump |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0332793Y2 (en) | 1991-07-11 |
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