JPH0166483U - - Google Patents
Info
- Publication number
- JPH0166483U JPH0166483U JP1987162934U JP16293487U JPH0166483U JP H0166483 U JPH0166483 U JP H0166483U JP 1987162934 U JP1987162934 U JP 1987162934U JP 16293487 U JP16293487 U JP 16293487U JP H0166483 U JPH0166483 U JP H0166483U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- control valve
- proportional control
- hydraulic pressure
- 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 9
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の一実施例における可変容量形
ポンプの油圧回路図、第２図は従来の可変容量形
ポンプの油圧回路図である。
１…ポンプ本体、１ａ…吐出ポート、３…可変
要素、８…変位検出器、１３…油圧比例制御弁、
１３ｄ…制御ポート、１４…ドレン流路、１８…
電磁比例減圧弁、１８ａ…出力ポート、１８ｂ…
入力ポート、３５…比較増幅器、３６…流量設定
器。
FIG. 1 is a hydraulic circuit diagram of a variable displacement pump according to an embodiment of the present invention, and FIG. 2 is a hydraulic circuit diagram of a conventional variable displacement pump. DESCRIPTION OF SYMBOLS 1...Pump body, 1a...Discharge port, 3...Variable element, 8...Displacement detector, 13...Hydraulic proportional control valve,
13d...Control port, 14...Drain channel, 18...
Electromagnetic proportional pressure reducing valve, 18a...output port, 18b...
Input port, 35...comparison amplifier, 36...flow rate setting device.
Claims (1)
３の変位に応じてポンプ本体１の吐出流量が可変
する可変容量形ポンプにおいて、油圧比例制御弁
制御用油圧に応じて前記可変要素駆動用油圧の圧
油流路をポンプ本体１の吐出ポート１ａに連通す
る状態とドレン流路１４に連通する状態とに切換
え、かつ前記油圧比例制御弁制御用油圧に比例し
て前記可変要素駆動用油圧の圧油流路の開度を可
変する油圧比例制御弁１３と、前記可変要素３の
変位を検出する変位検出器８と、この変位検出器
８の出力信号と外部の流量設定器３６の出力信号
との偏差に応じた出力信号を出力する比較増幅器
３５と、入力ポート１８ｂがポンプ本体１の吐出
ポート１ａに連通しかつ出力ポート１８ａが前記
油圧比例制御弁１３の制御ポート１３ｄに連通し
て前記比較増幅器３５からの出力信号に比例した
油圧を油圧比例制御弁制御用油圧として前記油圧
比例制御弁１３に供給する電磁比例減圧弁１８と
を設けたことを特徴とする可変容量形ポンプ。 In a variable displacement pump in which the discharge flow rate of the pump body 1 is varied according to the displacement of the variable element 3 driven by the hydraulic pressure for driving the variable element, the pressure of the hydraulic pressure for driving the variable element is changed according to the hydraulic pressure for controlling the hydraulic proportional control valve. The oil flow path is switched between a state where it communicates with the discharge port 1a of the pump body 1 and a state where it communicates with the drain flow path 14, and the pressure oil of the variable element drive hydraulic pressure is changed in proportion to the hydraulic pressure for controlling the hydraulic proportional control valve. A hydraulic proportional control valve 13 that varies the opening degree of the flow path, a displacement detector 8 that detects the displacement of the variable element 3, and an output signal of the displacement detector 8 and an output signal of the external flow rate setting device 36. The comparison amplifier 35 outputs an output signal according to the deviation, and the input port 18b communicates with the discharge port 1a of the pump body 1, and the output port 18a communicates with the control port 13d of the hydraulic proportional control valve 13. 35. A variable displacement pump characterized in that it is provided with an electromagnetic proportional pressure reducing valve 18 which supplies a hydraulic pressure proportional to the output signal from the hydraulic proportional control valve 13 to the hydraulic proportional control valve 13 as a hydraulic pressure for controlling the hydraulic proportional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16293487U JPH0723589Y2 (en) | 1987-10-23 | 1987-10-23 | Variable displacement pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16293487U JPH0723589Y2 (en) | 1987-10-23 | 1987-10-23 | Variable displacement pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0166483U true JPH0166483U (en) | 1989-04-27 |
| JPH0723589Y2 JPH0723589Y2 (en) | 1995-05-31 |
Family
ID=31447210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16293487U Expired - Lifetime JPH0723589Y2 (en) | 1987-10-23 | 1987-10-23 | Variable displacement pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0723589Y2 (en) |
-
1987
- 1987-10-23 JP JP16293487U patent/JPH0723589Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0723589Y2 (en) | 1995-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE69331840D1 (en) | Absaugsteuervorrichtung | |
| JPH0166483U (en) | ||
| EP0781923A4 (en) | Capacity controller of variable capacity hydraulic pump | |
| JPH01114990U (en) | ||
| JPH01163248U (en) | ||
| JPS6241883U (en) | ||
| JPH01180073U (en) | ||
| JPH0351201U (en) | ||
| JP2550198Y2 (en) | Displacement control device for variable displacement hydraulic pump | |
| JPS6386404U (en) | ||
| JPH0352281U (en) | ||
| JPS6354521U (en) | ||
| JPS643089U (en) | ||
| JPS61190488U (en) | ||
| JPH0417522U (en) | ||
| JPS60134885U (en) | Variable hydraulic pump capacity control device | |
| JPH01176771U (en) | ||
| JPH01141954U (en) | ||
| JPH0319476U (en) | ||
| JPH0352280U (en) | ||
| JPS6479401A (en) | Hydraulic driving device for load sensing control | |
| JPH01173386U (en) | ||
| JPS62147701U (en) | ||
| JPH0352277U (en) | ||
| JPS6347856U (en) |