HYDRAULIC UNIT

To provide a hydraulic unit which can specify an abnormality of a hydraulic circuit.SOLUTION: A hydraulic unit (1) comprises a hydraulic circuit (10) and a control device (20) for controlling the hydraulic circuit (10). The hydraulic circuit (10) includes a hydraulic pump (12) for supplying a workin...

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Bibliographische Detailangaben
Hauptverfasser: NAKAMURA HIROICHI, KAMIBAYASHI ATSUHIRO, SEGAWA HITOSHI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a hydraulic unit which can specify an abnormality of a hydraulic circuit.SOLUTION: A hydraulic unit (1) comprises a hydraulic circuit (10) and a control device (20) for controlling the hydraulic circuit (10). The hydraulic circuit (10) includes a hydraulic pump (12) for supplying a working fluid to a hydraulic actuator (2a), a discharge flow passage (14) for connecting the hydraulic pump (12) and the hydraulic actuator (2a), a valve (15) for blocking a flow of the working fluid of the discharge flow passage (14), and a pressure sensor (16) for detecting the pressure of the working fluid in the discharge flow passage (14). When a rotation number of the hydraulic pump (12) exceeds a prescribed first determination rotation number (N1) or a discharge flow rate of the hydraulic pump (12) exceeds a prescribed first discharge flow rate (Q1) in a pressure holding state, the control device (20) determines that the hydraulic circuit (10) is abnormal.SELECTED DRAWING: Figure 1 【課題】油圧回路の異常を特定できる油圧ユニットを提供する。【解決手段】油圧ユニット(1)は、油圧回路(10)と、油圧回路(10)を制御する制御装置(20)とを備える。油圧回路(10)は、作動油を油圧アクチュエータ(2a)に供給する油圧ポンプ(12)と、油圧ポンプ(12)と油圧アクチュエータ(2a)とを接続する吐出流路(14)と、吐出流路(14)の作動油の流れを遮断するバルブ(15)と、吐出流路(14)内の作動油の圧力を検出する圧力センサ(16)とを備える。制御装置(20)は、圧力保持状態において、油圧ポンプ(12)の回転数が所定の第1判定回転数(N1)を超えるか、又は油圧ポンプ(12)の吐出流量が所定の第1判定吐出流量(Q1)を超えると油圧回路(10)が異常であると判定する。【選択図】図1