Vibrating cone crusher

Details Vibrating cone crusher Vibrating cone crusher

1998-04-06

1999-12-07

Husar, John M.

Solid material comminution or disintegration

Apparatus

Cooperating comminuting surfaces

241210, 241211, B02C 204

Patent

active

059969156

DESCRIPTION:

BRIEF SUMMARY
VIBRATING CONE CRUSHER

1. Technical Field
The present invention relates to vibrating cone crushers in which the material is crushed between a cone and a frustoconical ring surrounding the cone, the axes of the cone and of the ring being vertical, and which include an annular frame bearing the ring, which is fixed in the central opening in the frame, and a device suitable for generating circular vibrations in a horizontal plane, a support for the cone, and several tie bolts connecting the frame and the cone support, the links between, on one hand, the ends of the tie bolts and, on the other hand, the frame and the cone support, respectively, being designed to allow horizontal relative movements of the frame and of the support; the assembly constituted by the frame, the members that it bears, the cone and its support rest on a bedplate or on the ground via elastic members: springs or rubber shock absorbing pads.
2. Background Art
It has been found that, in these crushers, the vibrating device, constituted, for example, by shafts with imbalance masses, or imbalance shafts, having vertical axes, generates not only horizontal vibrations of the frame bearing the ring, and of the cone support, when the crusher is in operation, but also vertical vibrations, the amplitude of which increases from the center towards the periphery of the crusher. These vertical vibrations have the harmful effects of changing the flow of materials in the grinding chamber, and of setting up stresses that are prejudicial to the mechanical strength of the crusher components, these stresses, due to the vertical accelerations, being all the greater the larger the crusher; such vertical vibrations can also be transmitted to the baseplate or to the foundations, which is inconvenient, and sometimes even dangerous. These vibrations also make the process unstable (low-frequency pulsations in the flow rate and of power consumption) through the effect of coupling between the flow of the materials into the chamber and the vertical vibrations.
The object of the present invention is to remove these drawbacks by suppressing, or at least substantially reducing, the vertical vibrations that perturb the operation of the crushers.


SUMMARY OF THE INVENTION

The crusher according to the present invention is characterised in that the center of gravity of the assembly constituted by the frame and the members that it supports and the center of gravity of the cone and its support are in the plane of the vibration forces generated by the vibrating device or in the vicinity thereof, More precisely, these centers of gravity must remain permanently within a fictitious sphere centered on the point defined by the intersection of the vertical axis of the cone with the plane of action of the vibration forces when the apparatus is idle, and having a diameter equal to 15% of the maximum diameter of the cone. By satisfying this condition, it is possible to avoid exerting upon the frame bearing the ring and upon the cone support tilting torques generating vertical vibrations.
According to one preferred form of embodiment, the frame comprises a skirt surrounding the support of the cone and possibly provided with weights, and a weighted cap is fixed on the apex of the cone. The elastic members supporting the crusher can be interposed between the bottom of the skirt and the bedplate or the foundations, the cone support being suspended from the frame by means of the through bolts. Other elastic members can be placed between the skirt and the support of the cone, or between the latter and the bedplate or the foundations.
Alternatively, the elastic members supporting the crusher can be placed between the cone support and the bedplate or the foundations, the other elastic members being placed between the skirt and the cone support.
The cone is mounted rotatably on a vertical shaft fitted into its support. To enable the height of the cone to be adjusted, it can be mounted rotatably, via bearings, on a sleeve mounted on the shaft in such a way as to be able to slide along it. Pr

REFERENCES:
patent: 4452401 (1984-06-01), Zarogatsky et al.
patent: 5570850 (1996-11-01), Kay
patent: 5575428 (1996-11-01), Cordonnier et al.

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