A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
PROBLEM TO BE SOLVED: To provide a hydraulic motor control device capable of improving the reliability.SOLUTION: A hydraulic motor control device comprises a selector valve 51 rotating forwardly and reversely a hydraulic motor 4 for driving a cooling fan, a variable relief valve 52 controlling pressure oil for driving supplied to the hydraulic motor 4 from a hydraulic pump 2 to a relief set pressure or less, a solenoid valve 53 outputting a switch control pressure for switching the selector valve 51 from an outlet port, and a controller 6 outputting a switch control signal for the solenoid valve 53, and comprises a relief pressure control part 5a controlling the relief set pressure of the variable relief valve 52 on the basis of the switch control pressure. The relief set pressure is controlled by the relief pressure control part 5a such that, at least either one of when switching from reverse rotation to forward rotation and when switching from forward rotation to reverse rotation, the relief set pressure of the variable relief valve 52 is reduced lower than a preset relief set pressure initial valve and then restoring the relief set pressure to the preset relief set pressure initial valve.SELECTED DRAWING: Figure 2
【課題】信頼性向上を図ることができる油圧モータ制御装置の提供。【解決手段】油圧モータ制御装置は、冷却ファン駆動用の油圧モータ４を正逆転させる切換弁５１と、油圧ポンプ２から油圧モータ４に供給される駆動用圧油をリリーフ設定圧以下に制御する可変リリーフ弁５２と、切換弁５１を切り換えるための切換制御圧を出口ポートから出力する電磁弁５３と、電磁弁５３の切換制御信号を出力するコントローラ６と、を備え、切換制御圧に基づいて可変リリーフ弁５２のリリーフ設定圧を制御するリリーフ圧制御部５ａを備え、リリーフ圧制御部５ａによるリリーフ設定圧の制御は、逆転から正転への切換時および正転から逆転への切換時の少なくとも一方において、可変リリーフ弁５２のリリーフ設定圧を、予め設定されたリリーフ設定圧初期値よりも低下させ、その後リリーフ設定圧初期値に復帰させる制御である。【選択図】図２
PROBLEM TO BE SOLVED: To provide a hydraulic motor control device capable of improving the reliability.SOLUTION: A hydraulic motor control device comprises a selector valve 51 rotating forwardly and reversely a hydraulic motor 4 for driving a cooling fan, a variable relief valve 52 controlling pressure oil for driving supplied to the hydraulic motor 4 from a hydraulic pump 2 to a relief set pressure or less, a solenoid valve 53 outputting a switch control pressure for switching the selector valve 51 from an outlet port, and a controller 6 outputting a switch control signal for the solenoid valve 53, and comprises a relief pressure control part 5a controlling the relief set pressure of the variable relief valve 52 on the basis of the switch control pressure. The relief set pressure is controlled by the relief pressure control part 5a such that, at least either one of when switching from reverse rotation to forward rotation and when switching from forward rotation to reverse rotation, the relief set pressure of the variable relief valve 52 is reduced lower than a preset relief set pressure initial valve and then restoring the relief set pressure to the preset relief set pressure initial valve.SELECTED DRAWING: Figure 2
【課題】信頼性向上を図ることができる油圧モータ制御装置の提供。【解決手段】油圧モータ制御装置は、冷却ファン駆動用の油圧モータ４を正逆転させる切換弁５１と、油圧ポンプ２から油圧モータ４に供給される駆動用圧油をリリーフ設定圧以下に制御する可変リリーフ弁５２と、切換弁５１を切り換えるための切換制御圧を出口ポートから出力する電磁弁５３と、電磁弁５３の切換制御信号を出力するコントローラ６と、を備え、切換制御圧に基づいて可変リリーフ弁５２のリリーフ設定圧を制御するリリーフ圧制御部５ａを備え、リリーフ圧制御部５ａによるリリーフ設定圧の制御は、逆転から正転への切換時および正転から逆転への切換時の少なくとも一方において、可変リリーフ弁５２のリリーフ設定圧を、予め設定されたリリーフ設定圧初期値よりも低下させ、その後リリーフ設定圧初期値に復帰させる制御である。【選択図】図２
HYDRAULIC MOTOR CONTROL DEVICE
油圧モータ制御装置
OKI TAKATOSHI (author)
2017-06-08
Patent
Electronic Resource
Japanese
HYDRAULIC DEVICE HYDRAULIC MOTOR AND CONSTRUCTION MACHINE
| European Patent Office | 2024
HYDRAULIC DEVICE, HYDRAULIC MOTOR AND CONSTRUCTION MACHINE
| European Patent Office | 2024
Hydraulic Hybrid Transmission with control of Hydraulic Motor
| European Patent Office | 2019
Electric loader hydraulic system and hydraulic motor control method
| European Patent Office | 2023