Improvements in or relating to Centrifugal Separators for Granular Substances.
Year: 1891

page_text: Date of Application, 13th Nov., 1891-Accepted, 19th Dec., 1891
COME LEIE SI DUIFICATION.
Improvements in or relating to Centrifugal Separators for Granular
Substances.
We HERMANN PAPE and WILHELM HENNEBERG Engineers and Manufac-
turers of Königstrasse 8, Hamburg in the Empire of Germany do hereby declare
the nature of this invention and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
In centrifugal separators for granular substances in which a rotary disk or dis-
tributing plane revolves in a closed chamber and throws the substances to be
separated according to their degrees of fineness into a series of concentric receivers,
it is advisable to provide for a continuous working of the machine.
The distributing device has generally been formed by a vertical shaft running in
a step bearing below and carrying the distributing plane on its upper end so that
the materials to be separated may be caused to fall onto the centre of the disk so
that the heavier particles may be thrown thereby to the outer receivers, the lighter
particles to the inner receivers.
This construction however is not in all respects suitable for continuous operation
since the step and collar bearings of the revolving shaft cannot be easily oiled
while the machine is running. Such position of the shaft is also inconvenient if
the lightest of the particles, as in separators with air aspiration, are intended to
fall into a central cavity or pipe below the distributing disk instead of into the
first of the concentric receivers, so that in practice such position of the shaft
renders such central receiving cavity impracticable.
To avoid these inconveniences and allow of a central receiving cavity existing
under the distributing disk, the improvements consist in so arranging the shaft or
spindle carrying the distributing disk that all bearings or parts requiring lubrication
are situated above the disk and above the cover of the machine.
In the accompanying drawings
Fig. 1 is a sectional elevation and Fig. 2 a plan of the improved machine.
bis the spindle which carries the distributing disk a, and c is the framework
supported on the cover d of the receiving chamber. The materials to be separated
are brought onto the disk a from a suitable hopper through the pipe m and are
prevented from touching the spindle by the pipe or sleeve s extending centrally
down within the pipe m and surrounding the central spindle. e¹e²e et are the con-
centric receivers of suitable number and size. f is the central cavity. The
concentric receivers may have continuous openings gas on the left of Fig. 2 or
may be divided by inclined walls into a number of separate receivers with outlets h
as on the right of Fig. 2. The separated products fall out through the ring slits
or through the separate outlets h into collecting troughs or any other convenient
receptacles. The lightest particles in the mixture fall into the central free cavity f
whence they may be continuously removed without any difficulty.
9
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
In separators in which the granular particles to be separated are thrown centri-
fucally be a rotating disk or distributor into a series of concentric receivers e¹ eª e³ eª,

page_text: 2
shafting etc., by the suspension of the spindle of the disk qr¿distributor above
the latter.
Dated this 13th day of November 1891.
HERBERT & Co.,
18, Buckingham Street, Strand,.London, W.C., Agents for the Applicants.