Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Fluid pressure responsive
Patent
1993-07-07
1995-06-06
Lithgow, Thomas M.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Fluid pressure responsive
210350, 210370, 2103803, 210784, 494 36, 494 38, 494 41, B01D 33067, B04B 302
Patent
active
054219973
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a sleeve filter centrifuge according to the preamble to patent claim 1.
Sleeve filter centrifuges of this type are known, for example, from DE-27 09 894 C3.
In the known sleeve filter centrifuge, the displacing shaft penetrates the inner chamber of the centrifugal drum when the drum is opened and can hereby transfer impurities, e.g. lubricants, from the machine frame of the centrifugal drum into its inner chamber. In the reverse case, when the centrifugal drum is closed, residual suspension can be introduced into the machine housing by the displacing shaft. These are both disadvantages since the impurities can impair the sterilization of the inner chamber of the drum, which is required for the treatment of sensitive suspensions, for example foods or pharmaceuticals, while residual suspension which reaches the machine frame can interfere with the centrifugal operation, in particular the movement of the displacing shaft.
The object of the invention is to remedy the deficiencies described and to design a sleeve filter centrifuge of the generic type such that the inner chamber of the centrifugal drum which accommodates the suspension is insulated relative to the machine frame side with respect to the transfer of solid, liquid and gaseous substances.
The object is accomplished in accordance with the invention by the characterizing features of patent claim 1.
The following description of preferred embodiments of the invention serves to explain the invention in greater detail in conjunction with the attached drawings. In the drawings:
FIG. 1 is a schematic and cut-off illustration of a sleeve filter centrifuge with dividing wall in the closed state of the centrifugal drum;
FIG. 2 shows the sleeve filter centrifuge of FIG. 1 with the centrifugal drum open;
FIG. 3 shows a sleeve filter centrifuge similar to FIG. 1 with a modified dividing wall and
FIG. 4 shows the sleeve filter centrifuge of FIG. 3 with the centrifugal drum open.
The sleeve filter centrifuge illustrated in FIGS. 1 and 2 comprises a housing 1, in which a hollow shaft 3 is rotatably mounted on a stationary machine frame 2 by a roller bearing 4. At least one additional roller bearing is located on the side of the machine frame 2 which is to the right in FIG. 1 and is no longer illustrated. The hollow shaft 3 is caused to rotate with the aid of drive means (located to the right in FIG. 2 and also not illustrated).
A displacing shaft 5 is guided for sliding displacement in the hollow shaft 3, whereby care is taken, e.g. by means of a wedge-groove connection, that the shaft 5 rotates simultaneously with the hollow shaft 3 despite its displaceability relative to this hollow shaft, i.e. is non-rotatingly coupled to the latter. Drive means (not illustrated), which move the displacing shaft 5 axially back and forth as required, are associated with this displacing shaft.
In the housing 1, a bowl-shaped centrifugal drum 6 is non-rotatingly and self-supportingly flange-mounted on the end of the hollow shaft 3 which is located to the left in FIGS. 1 and 2 and protrudes beyond the bearing 4, and such that an end wall 7 which closes the centrifugal drum 6 at its one end face (to the right in FIG. 1) is rigidly connected with the hollow shaft 3. The drum 6 has radially extending filtrate passages 9 in its cylindrical side wall 8. The centrifugal drum 6 is open at its end face opposite the end wall 7.
The one edge of a filter cloth 11 substantially cylindrical-tubular in design is sealingly clamped at the edge 10 of the opening surrounding the open end face of the centrifugal drum 6. The other edge of the filter cloth 11 is sealingly connected in a corresponding manner with a base portion 12 which, for its part, is rigidly connected with the displacing shaft 5. A drum lid 14 is rigidly attached to the base portion 12 via spacer bolts 13, leaving a space free therebetween. In FIG. 1, the lid sealingly closes the inner chamber of the drum 6 by engaging on the edge 10 of its opening and, in FIG. 2, is lifted away from the centrifugal drum 6 tog
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Heinkel Industriezentrifugen GmbH & Co. KG
Lithgow Thomas M.
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