JPS646502A - Hydraulic circuit apparatus controlled by load sensing - Google Patents
Hydraulic circuit apparatus controlled by load sensingInfo
- Publication number
- JPS646502A JPS646502A JP16270487A JP16270487A JPS646502A JP S646502 A JPS646502 A JP S646502A JP 16270487 A JP16270487 A JP 16270487A JP 16270487 A JP16270487 A JP 16270487A JP S646502 A JPS646502 A JP S646502A
- Authority
- JP
- Japan
- Prior art keywords
- flow rate
- hydraulic
- check valves
- valves
- pipe conduit
- 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
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
PURPOSE:To enable hydraulic control to cope with high pressurization by providing check valves on the main pipe conduit connected to a poppet valve and a pilot pipe conduit respectively in an apparatus which makes non-saturation control on the discharge flow rate of a hydraulic pump. CONSTITUTION:In an apparatus constituted in such a way that when the total amount of the consumption flow rates of hydraulic actuators 2, 3 tends to be larger than the discharge flow rate of a hydraulic pump 1, the openings of flow rate control value units 5, 6 with pressure compensation are throttled in the similar ratio to each other and the supply flow rate is reduced in the similar ratio to each other, check valves 40a-40f are provided on the main pipe conduits 9, 11, 20, 27 connected to poppet valves 12, 13, 34, 35 and check valves 24a-24f are also provided on pilot pipe conduits 17a-17f. Thereby, the flows from the hydraulic actuators 2, 3 to the poppet valves 9, 11, 25, 27 and to the pilot pipe conduit 17a-17f are cut off completely, and the pressure oil leakage during the high load condition is prevented, so that the high pressurization of the hydraulic circuit apparatus becomes possible.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62162704A JP2555361B2 (en) | 1987-06-30 | 1987-06-30 | Road sensing control hydraulic circuit device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62162704A JP2555361B2 (en) | 1987-06-30 | 1987-06-30 | Road sensing control hydraulic circuit device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS646502A true JPS646502A (en) | 1989-01-11 |
JP2555361B2 JP2555361B2 (en) | 1996-11-20 |
Family
ID=15759712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62162704A Expired - Lifetime JP2555361B2 (en) | 1987-06-30 | 1987-06-30 | Road sensing control hydraulic circuit device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2555361B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990011453A1 (en) * | 1989-03-22 | 1990-10-04 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic valve capable of pressure compensation |
US5654720A (en) * | 1993-08-20 | 1997-08-05 | Asahi Glass Company Ltd. | Glass antenna device for an automobile |
CN108035945A (en) * | 2018-01-07 | 2018-05-15 | 浙江高宇液压机电有限公司 | Control valve group for the output of quantitative system flow proportional |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6011706A (en) * | 1983-06-14 | 1985-01-22 | リンデ・アクチエンゲゼルシヤフト | Liquid pressure type apparatus having at least two working apparatuses loaded by one pump |
JPS60172707A (en) * | 1984-02-15 | 1985-09-06 | Komatsu Ltd | Oil pressure supply control device |
-
1987
- 1987-06-30 JP JP62162704A patent/JP2555361B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6011706A (en) * | 1983-06-14 | 1985-01-22 | リンデ・アクチエンゲゼルシヤフト | Liquid pressure type apparatus having at least two working apparatuses loaded by one pump |
JPS60172707A (en) * | 1984-02-15 | 1985-09-06 | Komatsu Ltd | Oil pressure supply control device |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990011453A1 (en) * | 1989-03-22 | 1990-10-04 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic valve capable of pressure compensation |
US5654720A (en) * | 1993-08-20 | 1997-08-05 | Asahi Glass Company Ltd. | Glass antenna device for an automobile |
CN108035945A (en) * | 2018-01-07 | 2018-05-15 | 浙江高宇液压机电有限公司 | Control valve group for the output of quantitative system flow proportional |
CN108035945B (en) * | 2018-01-07 | 2024-04-09 | 浙江高宇液压机电有限公司 | Control valve group for quantitative system flow proportion output |
Also Published As
Publication number | Publication date |
---|---|
JP2555361B2 (en) | 1996-11-20 |
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