JPS5654978A - Pressure accumulator controlling method - Google Patents

Pressure accumulator controlling method

Info

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
Application number
JP13004179A
Other languages
Japanese (ja)
Inventor
Keitaro Takiguchi
Takeo Hachitani
Masahide Nojima
Tomochika Oguma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13004179A priority Critical patent/JPS5654978A/en
Publication of JPS5654978A publication Critical patent/JPS5654978A/en
Pending legal-status Critical Current

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
JP13004179A 1979-10-11 1979-10-11 Pressure accumulator controlling method Pending JPS5654978A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS47103U (en) * 1971-06-29 1972-03-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS47103U (en) * 1971-06-29 1972-03-24

Cited By (2)

* Cited by examiner, † Cited by third party
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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