JPS5654978A - Pressure accumulator controlling method - Google Patents
Pressure accumulator controlling methodInfo
- Publication number
- JPS5654978A JPS5654978A JP13004179A JP13004179A JPS5654978A JP S5654978 A JPS5654978 A JP S5654978A JP 13004179 A JP13004179 A JP 13004179A JP 13004179 A JP13004179 A JP 13004179A JP S5654978 A JPS5654978 A JP S5654978A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- pressure
- pump
- unloader
- alarming
- 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
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
PURPOSE: To prevent an oil hydraulic apparatus from damage at the time of any abnormality in the unload circuit by stopping the oil pressure pump and alarming when the oil pressure pump is held in ON load for a period over a certain set value.
CONSTITUTION: An oil level sensor 17 is turned on to actuate a timer T1 when the oil level in a pressure oil tank 10 becomes over the value corresponding to the normal lower limit pressure P1 while an unloader switch 8 is turned on to actuate a timer T2 when an unloader valve 5 is switched over to the ON load side. When the times set in the timers T1, T2 are up, an alarm 18 is put in action and a pressure oil pump 2 is stopped. According to this arrangement, even if any abnormality has arisen at the unloader circuit, alarming can be emitted promptly as well as the pressure oil pump can be stopped immediately, so that the oil hydraulic apparatus is well prevented from damage.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13004179A JPS5654978A (en) | 1979-10-11 | 1979-10-11 | Pressure accumulator controlling method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13004179A JPS5654978A (en) | 1979-10-11 | 1979-10-11 | Pressure accumulator controlling method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5654978A true JPS5654978A (en) | 1981-05-15 |
Family
ID=15024660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13004179A Pending JPS5654978A (en) | 1979-10-11 | 1979-10-11 | Pressure accumulator controlling method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5654978A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5070571A (en) * | 1988-03-24 | 1991-12-10 | Nippon Wiperblade Co., Ltd. | Windshield wiper |
CN105730306A (en) * | 2016-04-21 | 2016-07-06 | 北京科技大学 | Pure electronic dump truck hydraulic lifting system and operation method |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS47103U (en) * | 1971-06-29 | 1972-03-24 |
-
1979
- 1979-10-11 JP JP13004179A patent/JPS5654978A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS47103U (en) * | 1971-06-29 | 1972-03-24 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5070571A (en) * | 1988-03-24 | 1991-12-10 | Nippon Wiperblade Co., Ltd. | Windshield wiper |
CN105730306A (en) * | 2016-04-21 | 2016-07-06 | 北京科技大学 | Pure electronic dump truck hydraulic lifting system and operation method |
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