| 摘要 |
<p>Rather than exhibiting a relief function when the hydraulic motor exceeds a specified maximum operation pressure, the hydraulic motor control device keeps the operation pressure from exceeding the maximum operation pressure, thereby stabilizing the operation of the hydraulic motor and keeping wasted energy loss to a minimum. Pressure sensors (29a, 29b) are provided respectively on the inlet and outlet ports (23a, 23b) of a hydraulic motor (23). Of the respective inlet and outlet ports (23a, 23b), the pressure of the port with the higher pressure is detected. If said pressure exceeds the maximum operation pressure, tangential velocity is detected using a gyrosensor (31), the necessary flow rate Qm =ν∙V∙(60/360∙103) for the swiveling motor (23) is computed by a controller (30), and pressure oil at the necessary flow rate is supplied to the swiveling motor by driving a pump regulator (21) of a variable capacity hydraulic pump (20).</p> |
