A hammer crusher has a rotor disk centered on and rotatable about
an axis, having a predetermined outside diameter, and formed with
five angularly equispaced and radially outwardly open pockets. Respective
support bolts in the cavities define on rotation of the disk an
orbit of generally the same diameter as the predetermined outside
disk diameter. Respective hammers pivoted on the bolts project radially
from the cavities on rotation of the disk. A pentagonal-section
shaft carries the disk and has facets directed radially outwardly
at the respective bolts.
What is claimed is:
1. A hammer crusher comprising: a rotor disk centered on and rotatable
about an axis, having a predetermined outside diameter, and formed
with five angularly equispaced and radially outwardly open pockets;
respective support bolts in the cavities defining on rotation of
the disk an orbit of generally the same diameter as the predetermined
outside disk diameter; respective hammers pivoted on the bolts and
projecting radially from the cavities on rotation of the disk; and
a pentagonal-section shaft carrying the disk and having facets directed
radially outwardly at the respective bolts.
2. The hammer crusher defined in claim 1 wherein the disk has a
diameter between 1600 mm and 2400 mm.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is the US national phase of PCT application PCT/EP99/07988
filed Oct. 21 1999 with a claim to the priority of German patent
application 198 48 866.1 filed Oct. 23 1998.
FIELD OF THE INVENTION
The invention relates to a hammer crusher having at least one rotor
formed by at least one impact disk on whose periphery is a plurality
of angularly equispaced impact hammers, each impact hammer being
freely rotatable on a support bolt in a respective swing cavity.
BACKGROUND OF THE INVENTION
Hammer crushers can have several rotors and each rotor can have
a plurality of adjacent impact disks whose diameters are each between
1600 and 2400 mm. Such hammer crushers generally have on each disk
six breaking hammers. Because of the cavity required for the breaking
hammers to pivot, the hammers of such crushers project only a small
amount. The result is that large-particle material cannot be drawn
in. Similarly, regardless of the type of stone being crushed, the
crushing effect of the known hammer crushers is reduced.
OBJECT OF THE INVENTION
It is an object of the invention to provide a hammer crusher such
that it does not have the disadvantages of the known hammer crushers.
SUMMARY OF THE INVENTION
The solution is a hammer crusher of the above-described type wherein
each impact disk has five impact hammers, the difference between
a diameter of the rotor and a diameter of the impact disks, and
thus the hammer projection is set as large as possible, and the
swing cavities for the impact hammers are spaced as closely as possible.
The larger hammer projection makes it possible to make the cross-sectional
size of the impact hammers substantially larger than is possible
with the known hammer crushers. As a result of the thus obtained
high inertia about the respective axes of the respective support
bolts the crushing effect of the individual impact hammers is substantially
increased. In addition relatively large stones can be better comminuted
by the impact hammers, in particularly large stones are reduced
to larger pieces than is possible with the known hammer crushers.
The described improvements with the hammer crusher according to
the invention lead to substantially greater material throughput
relative to the known hammer crushers.
In an embodiment of the invention the axle of the rotor is of pentagonal
section and facets of the axle of the rotor face toward the respective
swing cavities of the impact hammers.
BRIEF DESCRIPTION OF THE DRAWING
The invention is more specifically described with reference to
the drawing showing an embodiment whose sole FIGURE is a section
through the crusher according to the invention.
In the drawing a rotor 1 of a hammer crusher is shown having impact
disks 2 each with five cavities holding respective breaking hammers
3 spaced uniformly about its periphery. Each impact hammer 3 is
freely pivotal on a support bolt 4 in the respective swing cavity
5 that is slightly larger than the orbit of the respective impact
The difference between the diameter DR of the rotor 1 and the diameter
DS of the impact disks 2 is set as large as possible so that the
hammers project by a relatively large distance HU. This is achieved
in that the swing cavities 5 are spaced as closely as possible to
each other while at the same time the diameter DS of the impact
disks 2 is only slightly larger than the diameter DT of an orbit
7 of the support bolts 4 for the impact hammers 3 so that the support
bolts 4 are solidly anchored in the impact disks 2.
The axle 8 of the rotor 1 is of pentagonal section with facets
of the pentagon each directed at a respective swing cavity 5.