HYDRAULIC CONTROLLER

To prevent occurrence of hunting at a check valve.SOLUTION: In a hydraulic controller 10, a state determination unit 28a of a control unit 28 is configured to determine whether a second pump 30 is in a pressure rise operation state or in a transient state. A valve opening unit 28b is configured to,...

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Bibliographic Details
Main Authors NAKASONE MAKITO, HARADA MASAMICHI
Format Patent
LanguageEnglish
Japanese
Published 07.03.2019
Subjects
BLASTING
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:To prevent occurrence of hunting at a check valve.SOLUTION: In a hydraulic controller 10, a state determination unit 28a of a control unit 28 is configured to determine whether a second pump 30 is in a pressure rise operation state or in a transient state. A valve opening unit 28b is configured to, when the state determination unit 28a determines to be the pressure rise operation or transient state, determine whether a check valve 46 opens or not. A control unit 28c is configured to, when the valve opening unit 28b detects that the check valve 46 opens, stop the second pump 30, or reduce a rotational frequency Nep of the second pump 30.SELECTED DRAWING: Figure 1 【課題】チェック弁のハンチングの発生を防止する。【解決手段】油圧制御装置１０において、制御ユニット２８の状態判定部２８ａは、第２ポンプ３０が昇圧運転又は過渡状態であるか否かを判定する。開弁検知部２８ｂは、昇圧運転又は過渡状態であることを状態判定部２８ａが判定した場合、チェック弁４６が開いたか否かを判定する。制御部２８ｃは、チェック弁４６が開いたことを開弁検知部２８ｂが検知した場合、第２ポンプ３０を停止させるか、又は、第２ポンプ３０の回転数Ｎｅｐを低下させる。【選択図】図１
Bibliography:Application Number: JP20170155244