SERVO DRIVE HYDRAULIC UNIT - OKUMA MACHINERY WORKS LTD

Title:

SERVO DRIVE HYDRAULIC UNIT

Document Type and Number:

Japanese Patent JP2017025982

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide a servo drive hydraulic unit capable of detecting oil leakage inside a hydraulic circuit and preventing deterioration of thermal displacement accuracy of a machine due to oil leakage inside the hydraulic circuit, deterioration of working fluid and damage of the hydraulic unit.SOLUTION: A controller 22 includes oil leakage determination means 32 that determines occurrence of oil leakage in a case where a motor rotational frequency exceeds a preset value in dwelling after operation completion of a hydraulic actuator 5.SELECTED DRAWING: Figure 2

Inventors:

YOSHIDA MUTSUMI

Application Number:

JP2015143629A

Publication Date:

February 02, 2017

Filing Date:

July 21, 2015

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