JPH0347486U - - Google Patents
Info
- Publication number
- JPH0347486U JPH0347486U JP10664089U JP10664089U JPH0347486U JP H0347486 U JPH0347486 U JP H0347486U JP 10664089 U JP10664089 U JP 10664089U JP 10664089 U JP10664089 U JP 10664089U JP H0347486 U JPH0347486 U JP H0347486U
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- pump
- displacement
- variable
- 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.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図はこの考案の実施例に係る可変容量ポン
プの構成を示す油圧回路図、第２図はピストンポ
ンプに適用した場合の実施例に係る要部の機械的
構成を示す断面図である。
主要部分の符号の説明、１……メインポンプ要
素、２……吐出量可変要素、４……操作ピストン
、５……比例電磁制御弁、７……変位検出器、８
……圧力センサ、１０……制御アンプ装置、１１
……補助ポンプ、１４……圧抜弁、２２……斜板
、２３……バイアスばね、２４……操作ピストン
、２７……バイアスピストン、２８……ピン、３
４……圧抜弁の弁体、３５……戻しばね、３２，
３３……通路。
FIG. 1 is a hydraulic circuit diagram showing the configuration of a variable displacement pump according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the mechanical configuration of essential parts of the embodiment when applied to a piston pump. Explanation of symbols of main parts, 1... Main pump element, 2... Discharge rate variable element, 4... Operation piston, 5... Proportional electromagnetic control valve, 7... Displacement detector, 8
...Pressure sensor, 10...Control amplifier device, 11
... Auxiliary pump, 14 ... Pressure relief valve, 22 ... Swash plate, 23 ... Bias spring, 24 ... Operation piston, 27 ... Bias piston, 28 ... Pin, 3
4... Valve body of pressure relief valve, 35... Return spring, 32,
33...Aisle.
Claims (1)
変制御する吐出量可変要素、および前記吐出量可
変要素へ変位操作力を与えるための操作ピストン
とを備え、操作ピストンに作用させるパイロツト
圧油圧力を単一の比例電磁制御弁を用いて吐出圧
および吐出流量の測定電気量に基づく閉ループフ
イードバツク制御方式で制御することにより操作
ピストンを介して吐出量可変要素の位置制御をす
る可変容量型ポンプにおいて、前記吐出量可変要
素がカツトオフ位置近辺に位置したときに吐出量
可変要素により機械的に開かれて前記ポンプ要素
の吐出圧をタンクラインへ放出する圧抜弁を備え
たことを特徴とする可変容量型ポンプ。 A pump element, a discharge amount variable element for variably controlling its displacement by displacement, and an operation piston for applying a displacement operation force to the discharge amount variable element, and a pilot pressure hydraulic pressure applied to the operation piston. A variable displacement pump that uses a single proportional electromagnetic control valve to control the position of the variable discharge rate element via an operating piston by controlling with a closed-loop feedback control method based on measured electrical quantities of discharge pressure and discharge flow rate. The pump is characterized in that it includes a pressure relief valve that is mechanically opened by the discharge rate variable element to release the discharge pressure of the pump element to the tank line when the discharge rate variable element is located near the cut-off position. Capacitive pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10664089U JPH0724631Y2 (en) | 1989-09-13 | 1989-09-13 | Variable displacement pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10664089U JPH0724631Y2 (en) | 1989-09-13 | 1989-09-13 | Variable displacement pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0347486U true JPH0347486U (en) | 1991-05-02 |
| JPH0724631Y2 JPH0724631Y2 (en) | 1995-06-05 |
Family
ID=31655366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10664089U Expired - Lifetime JPH0724631Y2 (en) | 1989-09-13 | 1989-09-13 | Variable displacement pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0724631Y2 (en) |
-
1989
- 1989-09-13 JP JP10664089U patent/JPH0724631Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0724631Y2 (en) | 1995-06-05 |
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