JPH0377077U - - Google Patents
Info
- Publication number
- JPH0377077U JPH0377077U JP13602489U JP13602489U JPH0377077U JP H0377077 U JPH0377077 U JP H0377077U JP 13602489 U JP13602489 U JP 13602489U JP 13602489 U JP13602489 U JP 13602489U JP H0377077 U JPH0377077 U JP H0377077U
- Authority
- JP
- Japan
- Prior art keywords
- discharge
- pressure
- reversal
- flow rate
- time constant
- 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
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 5
Description
第１図はこの考案の実施例を示す回路図、第２
図は上記実施例の第１ポンプと第２ポンプの流量
特性を示す流量特性図、第３図は上記実施例の動
作を示す波形図、第４図は従来例を示す回路図で
ある。
１，２……可変容量形ポンプ、３……逆止弁、
４……アクチユエータ、６……制御部、１２，１
３……吐出量可変要素、１９，２９……変位検出
器、８１……逆転判別器、８３……時定数回路、
８４……逆転信号出力回路。
Figure 1 is a circuit diagram showing an embodiment of this invention, Figure 2 is a circuit diagram showing an embodiment of this invention.
The figure is a flow rate characteristic diagram showing the flow rate characteristics of the first pump and the second pump of the above embodiment, FIG. 3 is a waveform diagram showing the operation of the above embodiment, and FIG. 4 is a circuit diagram showing a conventional example. 1, 2...variable displacement pump, 3...check valve,
4...actuator, 6...control unit, 12,1
3... Discharge amount variable element, 19, 29... Displacement detector, 81... Reverse discriminator, 83... Time constant circuit,
84... Reverse signal output circuit.
Claims (1)
流量に対応した検出信号により電気・油圧系を閉
ループフイードバツク制御して吐出量可変要素の
位置を可変して吐出圧と吐出流量を制御する複数
の可変容量形ポンプの吐出側を合流して負荷に圧
油を供給する油圧供給装置において、 検出した流量信号とあらかじめ定められた逆転
基準値とを比較しポンプが逆転したことを判別す
る逆転判別手段と、該逆転判別手段からの出力信
号に時定数を与える時定数手段と、該時定数手段
からの出力信号があらかじめ定められた一定レベ
ルを越えたときに逆転検出信号を出力する逆転信
号出力手段とを備えたことを特徴とする油圧供給
装置。[Scope of Claim for Utility Model Registration] Discharge by varying the position of the discharge amount variable element by controlling the electric/hydraulic system in closed-loop feedback using a pressure setting signal, a flow rate setting signal, and a detection signal corresponding to the discharge pressure and discharge flow rate. In a hydraulic supply system that controls the pressure and discharge flow rate, the discharge sides of multiple variable displacement pumps are combined to supply pressure oil to the load. a reversal determining means for determining that the reversal has occurred, a time constant means for giving a time constant to an output signal from the reversal determining means, and a reversal determining means when the output signal from the time constant means exceeds a predetermined level A hydraulic pressure supply device comprising: a reverse rotation signal output means for outputting a detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13602489U JPH0724632Y2 (en) | 1989-11-27 | 1989-11-27 | Hydraulic supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13602489U JPH0724632Y2 (en) | 1989-11-27 | 1989-11-27 | Hydraulic supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0377077U true JPH0377077U (en) | 1991-08-01 |
| JPH0724632Y2 JPH0724632Y2 (en) | 1995-06-05 |
Family
ID=31683254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13602489U Expired - Lifetime JPH0724632Y2 (en) | 1989-11-27 | 1989-11-27 | Hydraulic supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0724632Y2 (en) |
-
1989
- 1989-11-27 JP JP13602489U patent/JPH0724632Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0724632Y2 (en) | 1995-06-05 |
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