JPS6421282U - - Google Patents
Info
- Publication number
- JPS6421282U JPS6421282U JP11597287U JP11597287U JPS6421282U JP S6421282 U JPS6421282 U JP S6421282U JP 11597287 U JP11597287 U JP 11597287U JP 11597287 U JP11597287 U JP 11597287U JP S6421282 U JPS6421282 U JP S6421282U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- variable displacement
- displacement pump
- cut
- servo cylinder
- 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 7
- 238000010586 diagram Methods 0.000 description 3
Description
第１図及び第２図はそれぞれ本考案の実施例の
油圧回路図、第３図は本考案の実施例のＰｄ−Ｑ
線図、第４図は従来装置の油圧回路図、第５図は
従来装置のＰｄ−Ｑ線図である。
１……可変容量形ポンプ、２……サーボシリン
ダ、３……サーボ弁、４……カツトオフ弁、５…
…セツト圧低減手段、６……圧力調整手段。
Figures 1 and 2 are hydraulic circuit diagrams of the embodiment of the present invention, and Figure 3 is the Pd-Q of the embodiment of the present invention.
FIG. 4 is a hydraulic circuit diagram of the conventional device, and FIG. 5 is a Pd-Q diagram of the conventional device. 1... Variable displacement pump, 2... Servo cylinder, 3... Servo valve, 4... Cut-off valve, 5...
... Set pressure reducing means, 6... Pressure adjusting means.
Claims (1)
リンダと可変容量形ポンプの吐出圧力を検出して
サーボシリンダを制御するサーボ弁と可変容量形
ポンプの吐出圧力がセツト圧力に達したときにサ
ーボシリンダを介して可変容量形ポンプの吐出量
を減少させるように切換え動作するカツトオフ弁
を備えた可変容量形ポンプの制御装置において、
カツトオフ弁の最大セツト圧力を当該回路のリリ
ーフ弁の設定圧力より高くとり、且つこのカツト
オフ弁にセツト圧力低減手段を配設したことを特
徴とする可変容量形ポンプのカツトオフ制御装置
。 A servo cylinder that controls the discharge amount of a variable displacement pump, a servo valve that detects the discharge pressure of the variable displacement pump and controls the servo cylinder, and a servo cylinder that controls the servo cylinder when the discharge pressure of the variable displacement pump reaches a set pressure. In a control device for a variable displacement pump, the control device includes a cut-off valve that operates to reduce the discharge amount of the variable displacement pump through the cut-off valve,
A cut-off control device for a variable displacement pump, characterized in that the maximum set pressure of the cut-off valve is set higher than the set pressure of the relief valve of the circuit, and the cut-off valve is provided with a set pressure reducing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11597287U JPS6421282U (en) | 1987-07-29 | 1987-07-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11597287U JPS6421282U (en) | 1987-07-29 | 1987-07-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6421282U true JPS6421282U (en) | 1989-02-02 |
Family
ID=31358104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11597287U Pending JPS6421282U (en) | 1987-07-29 | 1987-07-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6421282U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5932685A (en) * | 1982-08-16 | 1984-02-22 | Hitachi Constr Mach Co Ltd | Capacity controller for variable capacity pump |
| JPS60145472A (en) * | 1983-12-29 | 1985-07-31 | Kayaba Ind Co Ltd | Controller for variable-capacity pump |
-
1987
- 1987-07-29 JP JP11597287U patent/JPS6421282U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5932685A (en) * | 1982-08-16 | 1984-02-22 | Hitachi Constr Mach Co Ltd | Capacity controller for variable capacity pump |
| JPS60145472A (en) * | 1983-12-29 | 1985-07-31 | Kayaba Ind Co Ltd | Controller for variable-capacity pump |