| 摘要 |
<p>The invention relates to a pump unit (30) of a fluid circulation system of a drive assembly, the pump unit (30) comprising at least a hydraulic motor (33), a pump (36), and a separate reservoir (41). Fluid is pumped through the motor (33) from the separate reservoir (41) to the drive assembly by a pump outside the pump unit (33). By means of the pressure generated in the motor by the external pump, the motor (33) mechanically controls the pump (36) to draw fluid from the drive assembly to the separate tank (41). The invention also relates to an electric motor and a forest machine which comprise a pump unit according to the invention.</p> |
