| 摘要 |
The apparatus according to the invention for filtering contaminated liquids, such as cooling and/or lubricating liquids which are employed during the machining of workpieces with metal removal for example, has a liquid container (11) with an inlet (13) for contaminated liquid and an outflow (15) for filtered liquid, and a filtering insert which can be connected to the outflow is disposed in the container. In order to ensure high throughputs of liquid through the filtering insert, which are necessary in particular when full-flow filtration is employed, whilst at the same time keeping the requisite basal area and volume of the container as small as possible, it is proposed according to the invention that the filtering insert (18) substantially consists of a filter drum (19) which can be installed in the liquid container (11) fixed in relation thereto and which comprises a filter (25) which is disposed at its periphery and which can be cleaned by a cleaning device (28) which can be moved along the peripheral face of the drum. Since the filter drum is fixedly disposed in the liquid container, it can be connected directly, via a suction pipe and without a costly rotary lead-through, to the feed pump for the purified filtrate, which removes the filtrate directly from the filter drum by suction and which generates a comparatively high vacuum in the interior of the filter drum, which considerably increases the liquid throughput through the filter compared with known full-flow filtration apparatuses of the same surface area.
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