JPH0359501U - - Google Patents
Info
- Publication number
- JPH0359501U JPH0359501U JP12059989U JP12059989U JPH0359501U JP H0359501 U JPH0359501 U JP H0359501U JP 12059989 U JP12059989 U JP 12059989U JP 12059989 U JP12059989 U JP 12059989U JP H0359501 U JPH0359501 U JP H0359501U
- Authority
- JP
- Japan
- Prior art keywords
- oil passage
- oil
- actuator
- bypass
- side chamber
- 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.)
- Pending
Links
- 238000006073 displacement reaction Methods 0.000 claims description 8
- 230000008929 regeneration Effects 0.000 claims description 3
- 238000011069 regeneration method Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は、この考案の一実施例を示す油圧装置
のエネルギー再生回路図。第２図及び第３図は、
それぞれ第１図の他の実施態様を示す図。第４図
は、この考案が適用されるパワーシヨベルの斜視
概略図。
２……容量制御機構、４……可変容量ポンプ、
６……方向制御弁、８……他の方向制御弁、１０
……吐出油路、１２……アクチユエータ、１４…
…負荷側室、１８……パイロツト油路、２０……
バイパス油路、２２……バイパス油路開閉弁、２
４……信号オリフイス、２８……信号油路、３２
……パイロツト弁、４２……非負荷側室、６０…
…内部油路、６２……内部油路、６３……内部油
路、６４……内部油路、６６……絞り、６８……
チエツク弁、Ｗ……作業装置の荷重。
FIG. 1 is an energy regeneration circuit diagram of a hydraulic system showing an embodiment of this invention. Figures 2 and 3 are
FIG. 2 is a diagram showing other embodiments of FIG. 1, respectively; FIG. 4 is a schematic perspective view of a power shovel to which this invention is applied. 2... Capacity control mechanism, 4... Variable displacement pump,
6... Directional control valve, 8... Other directional control valve, 10
...Discharge oil path, 12... Actuator, 14...
...Load side chamber, 18...Pilot oil path, 20...
Bypass oil passage, 22...Bypass oil passage opening/closing valve, 2
4...Signal orifice, 28...Signal oilway, 32
...Pilot valve, 42...Non-load side chamber, 60...
...internal oil passage, 62...internal oil passage, 63...internal oil passage, 64...internal oil passage, 66...throttle, 68...
Check valve, W...Load of working equipment.
Claims (1)
の吐出油路に接続されて、アクチユエータを制御
する方向制御弁を備え、前記方向制御弁のアクチ
ユエータ非負荷側室作用位置において、前記可変
容量ポンプの吐出圧油がバイパス油路開閉弁及び
信号オリフイスを有するバイパス油路を介して油
タンクに戻されるよう接続されるとともに、前記
吐出圧油の一部は、前記信号オリフイスの上流側
において、信号油路を介して前記可変容量ポンプ
の容量制御機構に供給されるよう接続され、前記
アクチユエータの負荷側室の負荷保持圧油の一部
は、前記方向制御弁において、前記可変容量ポン
プの吐出圧油が前記非負荷側室へ供給される油路
に合流加算されるよう接続され、前記バイパス油
路開閉弁は、前記負荷保持圧油により制御される
パイロツト弁により制御されて、前記アクチユエ
ータに作用する作業装置の転圧時、前記バイパス
油路を閉路するよう構成されたことを特徴とする
油圧装置のエネルギー再生回路。 A directional control valve is connected to a discharge oil passage of a variable displacement pump controlled by a displacement control mechanism to control an actuator, and when the actuator of the directional control valve is in a non-load side chamber operating position, the discharge pressure oil of the variable displacement pump is controlled by a displacement control mechanism. is connected to be returned to the oil tank via a bypass oil passage having a bypass oil passage opening/closing valve and a signal orifice, and a portion of the discharged pressure oil is connected to the oil tank via a signal oil passage on the upstream side of the signal orifice. A portion of the load holding pressure oil in the load side chamber of the actuator is connected to the displacement control mechanism of the variable displacement pump so that the discharge pressure oil of the variable displacement pump is supplied to the non-load side chamber of the actuator. The bypass oil passage opening/closing valve is connected to the oil passage supplied to the side chamber so as to merge with the oil passage, and the bypass oil passage opening/closing valve is controlled by a pilot valve that is controlled by the load holding pressure oil to reduce the rolling pressure of the working device acting on the actuator. An energy regeneration circuit for a hydraulic device, characterized in that the energy regeneration circuit is configured to close the bypass oil path when the bypass oil path is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12059989U JPH0359501U (en) | 1989-10-17 | 1989-10-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12059989U JPH0359501U (en) | 1989-10-17 | 1989-10-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0359501U true JPH0359501U (en) | 1991-06-12 |
Family
ID=31668669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12059989U Pending JPH0359501U (en) | 1989-10-17 | 1989-10-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0359501U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001052936A1 (en) * | 2000-01-18 | 2001-07-26 | Yukie Takagi | Device for thermotherapy |
-
1989
- 1989-10-17 JP JP12059989U patent/JPH0359501U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001052936A1 (en) * | 2000-01-18 | 2001-07-26 | Yukie Takagi | Device for thermotherapy |
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