JPS62173570U - - Google Patents
Info
- Publication number
- JPS62173570U JPS62173570U JP6103186U JP6103186U JPS62173570U JP S62173570 U JPS62173570 U JP S62173570U JP 6103186 U JP6103186 U JP 6103186U JP 6103186 U JP6103186 U JP 6103186U JP S62173570 U JPS62173570 U JP S62173570U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- introduction passage
- pump
- passage
- receiving surface
- 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 3
- 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図は本考案の実施例の馬力一定制
御曲線図である。
１，１……可変容量形油圧ポンプ、２，２……
ポンプ容量制御装置、９……サーボ弁、１０……
タンク、１２……通路、１３……シヤトル弁、１
４……圧力導入路、１５……開閉制御部材、１６
，１７……受圧面、１８……対向受圧面、１９…
…パイロツト回路、２０……補助受圧面、２１…
…原動機、２２……制御弁。
FIG. 1 is a diagram of the conventional example, FIG. 2 is a diagram of the embodiment of the present invention, and FIG. 3 is a constant horsepower control curve diagram of the embodiment of the present invention. 1, 1... Variable displacement hydraulic pump, 2, 2...
Pump capacity control device, 9... Servo valve, 10...
Tank, 12... Passage, 13... Shuttle valve, 1
4... Pressure introduction path, 15... Opening/closing control member, 16
, 17...Pressure receiving surface, 18... Opposing pressure receiving surface, 19...
...Pilot circuit, 20...Auxiliary pressure receiving surface, 21...
...Prime mover, 22...Control valve.
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サーボ弁へ導入された圧力が
作用する対向受圧面を形成し、更にパイロツト圧
力の作用により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、該パイロ
ツト圧力を出力電気信号で圧力制御作動する制御
弁で制御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 that act on the servo valves of each pump capacity control device are connected to each other, and the passages are connected to a pressure introduction passage that introduces the highest discharge pressure of each hydraulic pump selected by the shuttle valve. The pressure introduction passage is provided with an opening/closing control member that slides to open and close the pressure introduction passage and connect the passage to the tank, and the opening/closing control member is pressed in a direction to open the pressure introduction passage. A plurality of pressure-receiving surfaces having the same area are formed so that the discharge pressure of each hydraulic pump acts in the same direction, and each of the pressure-receiving surfaces is formed so as to close the pressure introduction passage and press the passage in the direction of connecting it to the tank. It forms an opposing pressure receiving surface having a total area and on which the pressure introduced into the servo valve acts, and further forms an auxiliary pressure receiving surface that generates a force in the same direction as the force generated on the opposing pressure receiving surface by the action of the pilot pressure. A horsepower setting device for a plurality of hydraulic pumps, characterized in that the pilot pressure is controlled by a control valve that operates to control pressure using an output electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6103186U JPH0439428Y2 (en) | 1986-04-24 | 1986-04-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6103186U JPH0439428Y2 (en) | 1986-04-24 | 1986-04-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62173570U true JPS62173570U (en) | 1987-11-04 |
| JPH0439428Y2 JPH0439428Y2 (en) | 1992-09-16 |
Family
ID=30893990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6103186U Expired JPH0439428Y2 (en) | 1986-04-24 | 1986-04-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0439428Y2 (en) |
-
1986
- 1986-04-24 JP JP6103186U patent/JPH0439428Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0439428Y2 (en) | 1992-09-16 |
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