| 摘要 |
<p>A centrifugal fluid cleaning arrangement (100, figure 2(a)) in a fluid circulation system includes a centrifugal cleaner (100') through which only a proportion of the circulated fluid is diverted and drainage assistance means (102) which consists of a venturi arrangement (111) through which non-diverted fluid is passed, the venturi developing locally a significant pressure drop in a region into which opens an induction port (108) connected to the cleaner holding sump (101') so that the cleaned fluid is entrained into the non-diverted fluid and returned to the circulation. Whilst the pressure difference between inlet and induction ports is sufficient to drive the centrifugal cleaner rotor, the absolute pressures of the supply to, and drain from, the cleaner do not depend on the ambient atmospheric pressure and the overall pressure drop of the venturi arrangement is small, permitting it to be included within a closed circulation system. A regulator means (120, figure 2(b)) may by-pass the venturi arrangement to regulate the flow of fluid therethrough. The drainage assistance means may be separate from the centrifugal cleaner (20', figure 1(b)).</p> |
