HYDRAULIC UNIT

To provide a hydraulic unit capable of determining leakage of a working fluid in hydraulic cylinders.SOLUTION: A hydraulic unit (1) includes a control portion (20) for controlling a motor (13) in a process with operations of hydraulic cylinders (3A, 3B, 3C). The control portion (20) calculates an in...

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Bibliographische Detailangaben
Hauptverfasser:	KISHI YUYA, NAKAMURA HIROICHI, NOGUHCI AKIO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	To provide a hydraulic unit capable of determining leakage of a working fluid in hydraulic cylinders.SOLUTION: A hydraulic unit (1) includes a control portion (20) for controlling a motor (13) in a process with operations of hydraulic cylinders (3A, 3B, 3C). The control portion (20) calculates an integrated value of the product of a pressure of a working fluid discharged by a hydraulic pump (12) and a flow rate of the working fluid discharged by the hydraulic pump (12) and determines occurrence of leakage of the working fluid over a prescribed amount in the hydraulic cylinders (3A, 3B, 3C) when the integrated value is a prescribed threshold value or more.SELECTED DRAWING: Figure 1 【課題】油圧シリンダにおける作動油の漏れを判定できる油圧ユニットを提案する。【解決手段】油圧ユニット（１）は、油圧シリンダ（３Ａ,３Ｂ,３Ｃ）の動作を伴う工程中にモータ（１３）を制御する制御部（２０）を備える。制御部（２０）は、工程が開始してから工程が終了するまでの間、油圧ポンプ（１２）が吐出する作動油の圧力と油圧ポンプ（１２）が吐出する作動油の流量との積の積算値を算出し、積算値が所定の閾値以上であるとき、油圧シリンダ（３Ａ,３Ｂ,３Ｃ）で所定量を超える作動油の漏れが発生していると判定する。【選択図】図１