| 摘要 |
<p>PROBLEM TO BE SOLVED: To manufacture a pump unit which has an almost maintenance free power component provided with excellent noise reduction, small mounting space, high motor efficiency, low operation cost and production cost and is cooled during a continuous operation, in particular. SOLUTION: This pump unit is constituted so as to forcibly feed fluid having motor power surrounded by a hydraulic pump 40 and housings 1, 10. In this case, the housing 1 of a power area for guiding pump fluid taking driving remaining heat and bearing remaining heat is manufactured as a 2-shell type at the outside of a power internal chamber and/or a groove system 6 is attached. Pump fluid is sucked without an intermediate reservoir at least during passing through the housing of pump fluid by the pump.</p> |
