JPS6058661U - Hydraulic circuit device for hydraulic construction machinery - Google Patents
Hydraulic circuit device for hydraulic construction machineryInfo
- Publication number
- JPS6058661U JPS6058661U JP14952783U JP14952783U JPS6058661U JP S6058661 U JPS6058661 U JP S6058661U JP 14952783 U JP14952783 U JP 14952783U JP 14952783 U JP14952783 U JP 14952783U JP S6058661 U JPS6058661 U JP S6058661U
- Authority
- JP
- Japan
- Prior art keywords
- actuator
- hydraulic
- pressure
- valve
- unload
- 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
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は大容量可変ポンプによるポンプコーナ出力向上
の説明図、第２図は小容量可変ポンプ＋小容量固定ポン
プによるポンプコーナ出力向上説明図、第３図は本考案
−実施例の構成説明図、第４図は本考案の要部の構成説
明図、第５図はアンロード特性線図、第６図は本考案に
係る液圧回路装置におけるポンプコーナ出力向上の説明
図である。
５はアンロード弁、１３はリリーフ弁、Ａは増援回路。
＋ １−
ＰＩ ＰＨ
０３曽Ｑ ｌ−０２−Fig. 1 is an explanatory diagram of improving pump corner output using a large capacity variable pump, Fig. 2 is an explanatory diagram of improving pump corner output using a small capacity variable pump + small capacity fixed pump, and Fig. 3 is an explanation of the configuration of the present invention - an embodiment. 4 is an explanatory diagram of the configuration of the main part of the present invention, FIG. 5 is an unload characteristic diagram, and FIG. 6 is an explanatory diagram of improving the pump corner output in the hydraulic circuit device according to the present invention. 5 is an unload valve, 13 is a relief valve, and A is a reinforcement circuit. + 1- PI PH 03 SoQ l-02-
Claims (1)
タの切換作動を行うアクチュエータ操作弁りと、アクチ
ュエータの増援回路Ａに設けられてアクチュエータ圧Ｐ
Ｂが設定値Ｐ’１以上になると増援ポンプＰｎの吐出全
量をリリーフするリリーフ弁１３と、アクチュエータの
増援回路Ａに設けられてアクチュエータ圧ＰＢが前記リ
リーフ弁１３の設定値Ｐ１より高いアンロード圧でアン
ロード作動し且つ設定値Ｐ１と同じオンロード圧でオン
ロード作動するアンロード弁５とを備えたことを特徴と
する液圧建設機械の液圧回路装置。An actuator operation valve is provided in the actuator reinforcement circuit A to switch the actuator, and an actuator operation valve is provided in the actuator reinforcement circuit A to control the actuator pressure P.
A relief valve 13 that relieves the entire discharge amount of the reinforcement pump Pn when B exceeds a set value P'1, and an unload pressure provided in the reinforcement circuit A of the actuator so that the actuator pressure PB is higher than the set value P1 of the relief valve 13. 1. A hydraulic circuit device for a hydraulic construction machine, comprising: an unload valve 5 which performs an unload operation at a pressure equal to a set value P1, and an unload valve 5 which performs an on-load operation at the same on-load pressure as a set value P1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14952783U JPS6058661U (en) | 1983-09-29 | 1983-09-29 | Hydraulic circuit device for hydraulic construction machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14952783U JPS6058661U (en) | 1983-09-29 | 1983-09-29 | Hydraulic circuit device for hydraulic construction machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6058661U true JPS6058661U (en) | 1985-04-24 |
Family
ID=30331901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14952783U Pending JPS6058661U (en) | 1983-09-29 | 1983-09-29 | Hydraulic circuit device for hydraulic construction machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6058661U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014155972A1 (en) * | 2013-03-28 | 2014-10-02 | 株式会社神戸製鋼所 | Hydraulic shovel |
-
1983
- 1983-09-29 JP JP14952783U patent/JPS6058661U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014155972A1 (en) * | 2013-03-28 | 2014-10-02 | 株式会社神戸製鋼所 | Hydraulic shovel |
| JP2014190137A (en) * | 2013-03-28 | 2014-10-06 | Kobe Steel Ltd | Hydraulic shovel |
| US9790659B2 (en) | 2013-03-28 | 2017-10-17 | Kobe Steel, Ltd. | Hydraulic shovel |
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