JPS6373589U - - Google Patents
Info
- Publication number
- JPS6373589U JPS6373589U JP16667886U JP16667886U JPS6373589U JP S6373589 U JPS6373589 U JP S6373589U JP 16667886 U JP16667886 U JP 16667886U JP 16667886 U JP16667886 U JP 16667886U JP S6373589 U JPS6373589 U JP S6373589U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- introduction path
- receiving surface
- pressure receiving
- pump
- 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
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
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、第３図は制御特性の線図を示す。
１，１……可変容量形油圧ポンプ、２，２……
ポンプ容量制御装置、９，９……サーボ弁、１２
……通路、１４……圧力導入路、１５……開閉制
御部材、１６，１７……受圧面、１８……対向受
圧面、２０……補助受圧面、２１……切換弁、２
２……エアシリンダ、２３……原動機。
FIG. 1 is a diagram of a conventional example, FIG. 2 is a diagram of an embodiment of the present invention, and FIG. 3 is a diagram of control characteristics. 1, 1... Variable displacement hydraulic pump, 2, 2...
Pump capacity control device, 9, 9... Servo valve, 12
... Passage, 14 ... Pressure introduction path, 15 ... Opening/closing control member, 16, 17 ... Pressure receiving surface, 18 ... Opposite pressure receiving surface, 20 ... Auxiliary pressure receiving surface, 21 ... Switching valve, 2
2... Air cylinder, 23... Prime mover.
Claims (1)
を一定に制御するポンプ容量制御装置を備えた可
変容量形の油圧ポンプを複数台設け、これら油圧
ポンプを１台の原動機で駆動するようにしたもの
に於いて、各ポンプ容量制御装置のサーボ弁に作
用する圧力流体の通路を互に接続し、該通路を、
シヤトル弁で選択した各油圧ポンプのうちの最も
高い吐出圧を導入する圧力導入路に接続し、該圧
力導入路に、摺動により該圧力導入路の開閉と前
記通路のタンクへの接続とを行なう開閉制御部材
を設け、該開閉制御部材に、これが圧力導入路を
開く方向に押圧されるように各油圧ポンプの吐出
圧が夫々同方向に作用する同面積の複数の受圧面
を形成すると共に圧力導入路を閉じて通路をタン
クに接続する方向に押圧するように前記各受圧面
の合計面積を有し且つ圧力導入路へ導入された圧
力が作用する対向受圧面を形成し、更にエアシリ
ンダにより作動される切換弁を切換えることによ
り圧力導入路の圧力が作用して該対向受圧面に生
ずる力と同方向の力を生じさせる補助受圧面を形
成し、サーボ弁へ導入された圧力が該補助受圧面
に作用することにより馬力設定を変更するように
したことを特徴とする複数台の油圧ポンプの馬力
設定装置。 A plurality of variable displacement hydraulic pumps each equipped with a pump displacement control device that controls the pump horsepower to a constant level using a servo valve applied with pressure fluid are installed, and these hydraulic pumps are driven by a single prime mover. The pressure fluid passages acting on the servo valves of each pump displacement control device are connected to each other, and the passages are connected to each other.
A shuttle valve is connected to a pressure introduction path that introduces the highest discharge pressure of each hydraulic pump selected, and the pressure introduction path is opened and closed by sliding, and the passage is connected to a tank. A plurality of pressure receiving surfaces having the same area are formed on the opening/closing control member to which the discharge pressure of each hydraulic pump acts in the same direction so that the opening/closing control member is pressed in the direction of opening the pressure introduction path. an opposing pressure receiving surface having a total area of the respective pressure receiving surfaces and on which the pressure introduced into the pressure introducing path acts so as to press in a direction to close the pressure introduction path and connect the passage to the tank; By switching the switching valve operated by the servo valve, the pressure in the pressure introduction path acts to form an auxiliary pressure receiving surface that generates a force in the same direction as the force generated on the opposing pressure receiving surface, so that the pressure introduced into the servo valve is A horsepower setting device for multiple hydraulic pumps, characterized in that the horsepower setting is changed by acting on an auxiliary pressure receiving surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16667886U JPH0441270Y2 (en) | 1986-10-31 | 1986-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16667886U JPH0441270Y2 (en) | 1986-10-31 | 1986-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6373589U true JPS6373589U (en) | 1988-05-17 |
| JPH0441270Y2 JPH0441270Y2 (en) | 1992-09-28 |
Family
ID=31097885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16667886U Expired JPH0441270Y2 (en) | 1986-10-31 | 1986-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0441270Y2 (en) |
-
1986
- 1986-10-31 JP JP16667886U patent/JPH0441270Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0441270Y2 (en) | 1992-09-28 |
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