Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Patent
1982-01-11
1984-08-07
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Cooperating comminuting surfaces
241286, B02C 204
Patent
active
044639082
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to intermediate and fine cone crushers, and more particularly, to devices for clamping the adjustment ring of a cone crusher.
The present invention can be used to best advantage in the construction, ore mining and dressing industries.
DESCRIPTION OF THE PRIOR ART
The intermediate and fine cone crushers now in use comprise a liner-clad adjustment ring and a liner-clad breaking head arranged therewithin. Formed between the outer surfaces of the liners is a crushing chamber narrowing to the base of the taper liners and terminating, in its bottom portion, with a discharge opening defined by the shortest distance between the outer surfaces of the liners.
The breaking head is mounted on a spherical support secured on the crusher frame. The adjustment ring is thread-jointed with a support ring mounted on the crusher frame. The breaking head has its drive provided with an eccentric or out-of-balance weight vibrator. The liners mounted on the adjustment ring and on the breaking head are shaped as removable taper shells.
As a result of intensive wear of the liners, the discharge opening between their crushing surfaces becomes larger, resulting in a coarser product discharging from the crushing chamber. To stabilize the crushing process, the crusher setting is periodically adjusted, thus bringing it to the initial set value.
To adjust the setting between the cones, the adjustment ring is rotated in the threaded joint whereupon it is clamped with respect to the support ring. Clamping is accomplished with the aid of power means providing a clamping thrust to said threaded joint.
The adjustment ring clamping device is one of the most critical units of a crusher because of high impact loads generated in the crushing chamber.
There is known a device for clamping the adjustment ring of a cone crusher (Cf. USSR Inventor's Certificate No. 298,377, Int.Cl. B02C 2/04, issued Aug. 1, 1969, inventors: Kolesnik G. G. and Pikhalenko I. G.). The device comprises a support ring screw-threaded to the adjustment ring provided with a clamping ring screw-threaded thereon and spaced from the support ring at an end clearance, wedge jacks being installed in the support ring to apply a clamping thrust to the screw-threaded joints of the adjustment ring with the support ring and clamping ring.
In this device, the clamping ring is screw-threaded with the adjustment ring and rests upon the support ring via the wedge jacks placed in annular recesses of the clamping ring and the support ring. The wedge jacks are fashioned as superimposed pairs of oppositely directed wedges and, as the clamping ring is rotated to lock the adjustment ring, the upper wedges, under the action of frictional forces, start slipping against the lower ones and shifting vertically, thereby applying a clamping thrust to the threaded joints of the adjustment ring with the support ring and clamping ring. With the adjustment ring rotated, together with the clamping ring, in the opposite direction, the upper wedges start slipping downward against the inclined surfaces of the lower wedges, which results in the elimination of the upthrust in the threaded joints.
However, the wedge jacks fail to provide a reliable clamping of the adjustment ring in the threads, since vibrations of the adjustment ring, clamping ring, and support ring caused by the crushing blows in the crushing chamber eliminate the force of friction between the wedges, which sets the adjustment ring free to rotate back out, this being followed by possible failure. Moreover, the wedge jacks are difficult to manufacture.
There is also known a device for clamping the adjustment ring of a cone crusher (Cf. French Patent No. 2,038,855, Int. Cl. B02 2/00, patented Jan. 8, 1971, assigned: Barber Green Company, USA). The device is known to comprise a support ring screw-threaded to an adjustment ring, a clamping ring and clamping leverages with double-acting hydraulic cylinders.
In this device, the clamping ring is screw-threaded to the support ring and locked not t
REFERENCES:
patent: 3759453 (1973-09-01), Johnson
Barzukov Oleg P.
Blekhman Ilya I.
Cherkassky Vladimir A.
Finkelshtein Georgy A.
Ivanov Boris G.
Rosenbaum Mark
Vsesojuzny Nauchnoissledovatelsky I Proektny Institut Mekhaniche
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