JPS61101103U - - Google Patents
Info
- Publication number
- JPS61101103U JPS61101103U JP18678984U JP18678984U JPS61101103U JP S61101103 U JPS61101103 U JP S61101103U JP 18678984 U JP18678984 U JP 18678984U JP 18678984 U JP18678984 U JP 18678984U JP S61101103 U JPS61101103 U JP S61101103U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- pressure
- throttle
- constant differential
- differential pressure
- 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.)
- Pending
Links
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は従来例の線図、第２図は本考案の実施
例の線図である。
１……可変容量ポンプ、２……吐出回路、３…
…切換弁、４……絞り、５……アクチユエータ、
７……差圧一定弁、８……スプール、９……ばね
、１０……フイードバツク回路、１１……タンク
回路、２６……容量制御シリンダ、１４……パイ
ロツトリリーフ弁、１６……アンロード弁、１７
……絞り。
FIG. 1 is a diagram of a conventional example, and FIG. 2 is a diagram of an embodiment of the present invention. 1...variable displacement pump, 2...discharge circuit, 3...
...Switching valve, 4... Throttle, 5... Actuator,
7... Constant differential pressure valve, 8... Spool, 9... Spring, 10... Feedback circuit, 11... Tank circuit, 26... Capacity control cylinder, 14... Pilot relief valve, 16... Unload valve , 17
...Aperture.
Claims (1)
絞りを備えた切換弁を介してアクチユエータに接
続し、フイードバツク回路を介して導いた該切換
弁の絞りの後方の圧力とばねの力が一方向に作用
すると共にこれらに対向して吐出回路の圧力が作
用するスプールを備えた差圧一定弁を設け、該ポ
ンプの容量制御シリンダを、該差圧一定弁を介し
て吐出回路とタンク回路とに選択的に接続して該
ポンプの容量を制御するようにしたものに於いて
、該フイードバツク回路に絞りを設けると共に該
絞りと差圧一定弁の間の該フイードバツク回路に
パイロツトリリーフ弁を設け、該可変容量ポンプ
の吐出回路にアンロード弁を設けてこれにフイー
ドバツク回路の絞りと差圧一定弁の間の圧力を導
入し、該アンロード弁が作動する圧力よりも差圧
一定弁が吐出回路を選択作動する圧力を低く設定
することを特徴とする流体制御装置。 The discharge circuit of the variable displacement pump is connected to the actuator through a switching valve equipped with a throttle for proportional control, and the pressure behind the throttle of the switching valve and the spring force guided through the feedback circuit are unidirectional. A constant differential pressure valve equipped with a spool on which the pressure of the discharge circuit acts is provided, and the displacement control cylinder of the pump is selected between the discharge circuit and the tank circuit via the constant differential pressure valve. In a device in which a throttle is provided in the feedback circuit and a pilot relief valve is provided in the feedback circuit between the throttle and the constant differential pressure valve, the variable pressure An unload valve is provided in the discharge circuit of the displacement pump, and the pressure between the throttle of the feedback circuit and the constant differential pressure valve is introduced into this, and the constant differential pressure valve selects the discharge circuit rather than the pressure at which the unload valve operates. A fluid control device characterized by setting operating pressure low.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18678984U JPS61101103U (en) | 1984-12-11 | 1984-12-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18678984U JPS61101103U (en) | 1984-12-11 | 1984-12-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61101103U true JPS61101103U (en) | 1986-06-27 |
Family
ID=30744257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18678984U Pending JPS61101103U (en) | 1984-12-11 | 1984-12-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61101103U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5620803A (en) * | 1979-07-27 | 1981-02-26 | Daikin Ind Ltd | Hydraulic circuit |
| JPS5639307A (en) * | 1979-09-04 | 1981-04-15 | Daikin Ind Ltd | Controller for fluid |
-
1984
- 1984-12-11 JP JP18678984U patent/JPS61101103U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5620803A (en) * | 1979-07-27 | 1981-02-26 | Daikin Ind Ltd | Hydraulic circuit |
| JPS5639307A (en) * | 1979-09-04 | 1981-04-15 | Daikin Ind Ltd | Controller for fluid |
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