Title of Invention

A VIBRATING CONE CRUSHER

Abstract The present invention relates to vibrating cone crusher comprising: a cone; a ring surrounding said cone, said cone and said ring each having a vertical axis; an annular frame bearing said ring; a means of generating circular vibrations in a horizontal plane; a cone supporting said cone; a plurality of tie bolts connecting said annular frame to said cone support, said plurality of tie bolts having respective connections with said annular frame and said cone support adapted to permit horizontal relative movements of said annular frame and of said cone support; and a plurality of elastic members adapted to support said annular frame on an underlying surface, said annular frame and said cone and said cone support each having a centre of gravity located in said horizontal plane of said means of generating circular vibrations or located within a space defined by two parallel planes at a distance from said horizontal plane equal to ±15% of a maximum diameter of said cone.
Full Text The present invention relates to a vibrating cone crushers in which the material is crushed between a cone and a frusto-conical collar which encircles the cone, the axes of the cone and of the collar being vertical, and comprising an annular supporting frame which supports said collar which is secured in position in the central opening of the supporting frame, and a device which is suitable for generating circular vibrations in a horizontal plane, a support for the cone and a plurality of stay bars which connect the supporting frame and the support of the cone, the connections between the ends of the stay bars and the supporting frame, or the support of the cone, being designed so as to permit relative horizontal movements of the supporting frame and of the support; the unit; which is formed by the supporting frame, the parts which it supports, the cone and its support, being supported on a mounting structure or on the ground via flexible intermediate members, being springs or rubber damping studs.
It was noted that, in these crushers, the vibrating device, which is, for example, formed by unbalanced shafts having a vertical axis, generates not only horizontal vibrations of the supporting frame, which supports the collars, and of the cone support, when the cmsher is operating, but also vertical vibrations, the amplitude of which increases from the centre in the direction of the periphery of the crusher. These vertical vibrations have the undesirable consequences of modifying the flow of the materials in the crushing chamber and imposing constraints which have an adverse effect on the mechanical behaviour of the parts of the crusher, these constraints being due to vertical accelerations which are greater, the larger the crusher; and it is also possible for these vertical vibrations to be transmitted to the mounting structure or to the foundations, which is annoying and sometimes even dangerous. These vibrations also cause the process to be unstable (low-frequency pulses of the throughput and of the absorbed
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power) by an effect which couples the flow of material in the chamber and the vertical vibrations.
The object of the present invention is to overcome these drawbacks by removing or at least substantially reducing the vertical vibrations which disturb the operation of these
crushers.
The crusher which forms the object of the present invention is characterized in that the centre of gravity of the unit formed by the supporting frame and the parts which it supports, and the centre of gravity of the cone and its support are disposed in the plane of the vibrating forces generated by the vibrating device or in the vicinity of said plane. More precisely, it is necessary that these centres of gravity permanently remain within an imagined sphere which is centred on the point defined by the intersection of the vertical axis of the cone with the plane of action of the vibrating forces when the apparatus is in the neutral position, and has a diameter equal to 15% of the maximum diameter of the cone. If this requirement is met, it is possible to prevent rocking couples, which generates the vertical vibrations, from being exerted on the supporting frame, which supports the collar, and on the support of the cone.
According to a preferred embodiment, the supporting frame comprises a skirting which encircles the support of the cone and is possible provided with inertia blocks, and a heavy top is secured on the top of the cone. It is possible for the flexible members which support the crusher to be placed in position between the bottom of the skirting and the mounting structure or the foundations, the support of the cone being suspended from the supporting frame by means of stay bars. It is possible for other
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flexible members to be placed in position between the skirting and the support of the cone or between the latter and the mounting structure or the foundations.
In a variation, it is possible for the flexible members which support the crusher to be placed in position between the support of the cone and the mounting structure or the foundations, other flexible members being placed in position between the skirting and the support of the cone.
The cone is mounted for rotation on a vertical shaft which is secured in its support. In order to permit a control of the elevation of the cone, it is possible for the latter to be mounted for rotation, via bearings, on a sleeve which is mounted on the shaft such that it can slide along said shaft. The shaft and the sleeve are preferably provided with shoulders, a sealed annular chamber being provided between the two shoulders, and a duct bored into the shaft permits the supply of a compressed liquid to said chamber, in order to raise the cone, or the evacuation of said liquid to lower the cone.
It is possible for the supporting frame to be constituted by a bottomless vessel in which the collar is secured by appropriate means, and which is provided with an annular flange on which the vibrating device is mounted, the skirting being secured in position on the edge of the flange via its upper end. The vibrating device is advantageously formed by unbalanced shafts having a vertical axis and mounted on said flange, each shaft comprising two unbalances disposed on either side of the flange such that the vibration forces generated by the rotation of the shafts are provided in a horizontal plane merging with the middle plane of the flange or the vicinity thereof. It may comprise a dephasing device formed by a rotating jack, the body or rotating part of
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which is directly coupled to one of the unbalanced shafts, at least one other unbalanced shaft being coupled to the rotating part of the body of the jack, respectively, by a driving belt and pulleys.
Accordingly, the present invention provides a vibrating cone crusher comprising: a cone; a ring surrounding said cone, said cone and said ring each having a vertical axis; an annular frame bearing said ring; a means of generating circular vibrations in a horizontal plane; a cone support supporting said cone; a plurality of tie bolts connecting said annular frame to said cone support, said plurality of tie bolts having respective connections with said annular frame and said cone support adapted to permit horizontal relative movements of said annular frame and of said cone support; and a plurality of elastic members adapted to support said annular frame on an underlying surface, said annular frame and said cone and said cone support each having a centre of gravity located in said horizontal plane of said means of generating circular vibrations or located within a space defined by two parallel planes at a distance from said horizontal plane equal to ±15% of a maximum diameter of said cone.
The following description refers to the attached drawings which show, by way of non-limiting example, an embodiment of the invention, and in which:
Figure 1 is a vertical section of a vibrating cone crusher according to the
invention; and Figure 2 is a cross-section of a rotating jack which forms the dephasing device of
the vibration-generating system.

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The crusher illustrated in Figure 1 comprises a supporting frame which is formed by a bottomless vessel 12, which is circular in cross-section and has a vertical axis, and is provided with a flange 14, and by a skirting 16 which is secured in position below the flange at the edge thereof. The skirting rests on the foundations via rubber damping studs 18 which support the crusher. It is possible for inertia blocks 79 to be secured below the skirting.
A collar 22 is mounted coaxially within the vessel. It is an interchangeable wearing part which is secured in the vessel by a strap and bolts.
The part 24, referred to as the "cone", which co-operates with the collar 22, is in fact constituted by a wearing part 28, the general shape of which is that of a variably sloping truncated cone which is mounted on a support 30 of the same shape and is maintained in position thereon by means of a strap and screws; mounted thereon is a
top 32.
The cone is mounted on a shouldered sleeve 34 via roller bearings, in a manner so as to be able to turn freely about its axis. The sleeve 34, itself, is mounted to slide on a shouldered shaft 38. The common vertical axis of the cone, the sleeve and the shaft is merged with the axis of the collar 22 when the crusher is in the neutral position.
Gaskets are placed between the sleeve and the shaft, above and below the shoulders, such that a sealed chamber 40 is provided between said shoulders. A duct 42 bored into the shaft permits a communication between this chamber and a source of compressed liquid. By admitting liquid into the chamber, or by evacuating it therefrom, the vertical position of the cone relative to the collar is altered and,

consequently, the particle size of the crushed goods.
The support 44 of the cone is constituted by a hub 46, in which is secured the shaft 38, and a collar 48 which is connected to the hub by vertical ribs 50; the space provided between the hub and the collar permits the withdrawal of the crushed matter. The support is suspended from the supporting frame 10 by means of tie rods or stay bars 52, the ends of which are connected via hinge joints, to the flange 14 of the supporting frame and to an annular plate 54 which is integral with the collar 48. A single stay bar is shown in the drawing, but it is evident that the crusher comprises a plurality of stay bars, for example four, distributed uniformly about the axis of the crusher. The plate 54 is, in addition, connected to the skirting 16 via rubber damping studs 55, which take up at least a portion of the mass of the cone and of its support. The leak-tightness between the supporting frame 10 and the support 44 of the cone is ensured by a metal skirting 51 and a deformable packing 53. The leak-tightness between the support 44 and the sleeve 34 is ensured by a deformable packing 57.
The vibration device of the crusher is constituted by a plurality of vertical unbalanced shafts 56 which are mounted on the supporting frame 10 and only one of which is shown in the drawing. Each shaft 56 is mounted on a flange 14 via roller bearings and comprises two unbalances 58 which are disposed on either side of the flange; as a result of this arrangement, the forces exerted by the unbalances on the supporting frame 10, when the shafts 56 are rotated, are disposed in a horizontal plane p-p which is in very close proximity to the middle plane of the flange and is capable of merging therewith.
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One of the unbalanced shafts is connected, via a double universal joint coupling, to a drive shaft 60; the other unbalanced shafts are driven by the first via a mechanical driving system of belts and pulleys, in which is incorporated a dephasing device which permits adjusting of the angular staggering of one group of unbalanced shafts relative to the others, in order to change the amplitude of the resultant centrifugal forces generated by the rotation of the unbalanced shafts. A system of this kind is described in FR-A-2681080 and WO-A-9421380.
In an exemplified embodiment, the crusher comprises four vertical unbalanced shafts disposed at the tops of a square, as described in WO-A-9421380. The unbalanced shaft which is diagonally opposite the unbalanced shaft 56 which is directly connected to the drive shaft 60 is rotated by a belt 63 which runs across pulleys 64 which are wedged on these two unbalanced shafts, and on return pulleys which are loosely mounted on the other two unbalanced shafts. The latter are rotated by a second belt 65 which runs across two pulleys which are wedged on these two shafts, across a pulley 66 which is wedged on a sleeve 67 which is integral with the body of a rotating jack 68 which is mounted on the shaft 56, and across a return pulley which is loosely mounted on the fourth unbalanced shaft.
The rotating jack illustrated in Figure 2 comprises a cylindrical body 69 which is closed off at its ends by the bottoms 70 and 71. A shaft 72 is disposed coaxially in the body of the jack; it passes through the bottom 70 in which it is mounted via a bearing which is capable of taking up the axial forces to which the shaft may be subjected, in order to prevent it from being displaced axially relative to the body of the jack.

A tubular casing 73 is wedged on the shaft. A piston 74 is mounted in the body of the jack; it comprises a skirting disposed between the wall of the body of the jack and the tubular casing 73. A runner 75, which is mounted on a fixed axle on the body of the jack, is received in a helical groove 76 which is machined out of the piston, such that any axial displacement of the piston in the body of the jack is accompanied by a rotation of the piston relative to the body of the jack. In like manner, a runner 77, which is mounted on a fixed axle on the skirting of the piston is accommodated in a helical groove 78 machined out of the tubular casing, such that any axial displacement of the piston in the body of the jack causes the shaft 72 to rotate. The directions of the grooves 76 and 78 are selected such that the rotations of the piston and of the shaft are added together. By admitting a compressed fluid into the one or the other chamber of the jack, the shaft 72 is caused to rotate in the one or in the other direction, relative to the body of the jack. Gaskets are mounted on the piston and on the shaft, at the point where it passes through the bottom 70.
Instead of using a runner and a helical groove for transformftig the translational motion, it is possible to provide helical teeth on the piston and on the shaft, for engaging with crown gears secured on the body of the jack and the skirting of the piston, respectively.
The body of the jack is secured on the sleeve 67 and the outer end of the shaft is secured in a bore in the shaft 56 and is wedged thereon.
The jack is supplied with compressed oil via a rotary joint and through a three-way valve which permits a supply to the one or the other of its chambers, so as to turn the
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shaft 72 in the one or in the other direction, and to isolate the two chambers by retaining the compressed oil therein, in order to prevent any rotation of the shaft relative to the body of the jack and to render it integral therewith.
Under operating conditions, the valve being in the locking position (isolated chambers of the jack), all the unbalanced shafts are rotated at the same rate, and the amplitude of the resultant vibration force depends on the relative angular positions of the unbalanced shafts. In order to change this amplitude, the valve is used to control the rotation of the shaft 72 of the jack, which causes a relative rotation of the two shafts of one group relative to these of the other group; this adjusting may be carried out during operations.
A feeder hopper 62 is secured on the vessel 12.
The various parts of the crusher are dimensioned such that the centre of gravity of the unit comprising the supporting frame 10 and the parts which it supports, in particular the collar 22 and the unbalanced shafts 56, and the centre of gravity of the cone 24 and its support 44 are disposed in the plane P-P of the vibrating forces or in the immediate vicinity of this plane. This condition is met, in particular, by the appropriate selection of the mass of the skirting 16, of the inertia blocks 79 and of the top 32. More precisely, the centres of gravity remain within a virtual sphere which is centered over the point 0 defined by the intersection of the vertical axis of the cane and the plane P-P when the apparatus is in the neutral position, and the diameter of which is equal to 15% of the maximum diameter D of the cone, for all operating conditions of the crushers. As explained above, as a result of this arrangement, it is possible to remove
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the rocking couples and, thus, the vertical vibrations. It is to be noted that the maximum diameter D is the effective part of the cone, i.e. the part which is effectively used for crushing. As is seen in Figure 1, it is possible for the cone to be extended downwardly by a part having a diameter in excess of D, which need not be taken into
consideration.
It is possible to use other arrangements for the support of the crusher. It is, for example, possible for the support of the cone of rest on the ground or on the foundations, via flexible damping studs, for the supporting frame and its load to rest either directly on the ground or on the foundations, as in the embodiment described above, or on the support of the cone, via studs similar to the studs 18 or 55.
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WE CLAIM;
1. A vibrating cone crusher comprising: a cone; a ring surrounding said cone, said cone and said ring each having a vertical axis; an annular frame bearing said ring; a means of generating circular vibrations in a horizontal plane; a cone support supporting said cone; a plurality of tie bolts connecting said annular frame to said cone support, said plurality of tie bolts having respective connections with said annular frame and said cone support adapted to permit horizontal relative movements of said annular frame and of said cone support; and a plurality of elastic members adapted to support said annular frame on an underlying surface, said annular frame and said cone and said cone support each having a centre of gravity located in said horizontal plane of said means of generating circular vibrations or located within a space defined by two parallel planes at a distance from said horizontal plane equal to ±15% of a maximum diameter of said cone.
2. The vibrating cone crusher as claimed in claim 1, wherein said centres of gravity are within a sphere the centre of which is located at a point defined by an intersection of the vertical axis of the cone and of the horizontal plane when the crusher is idle and a diameter of the sphere is equal to 15% of the maximum diameter of the cone.
3. The vibrating cone crusher as claimed in claim 1, wherein the annular frame comprises a skirt surrounding the cone support, said elastic members being placed between the bottom of the skirt and the underlying surface.
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4. The vibrating cone crusher as claimed in claim 1, wherein the annular frame comprises a skirt surrounding the cone support, said elastic members being placed between said cone support and the underlying surface.
5. The vibrating cone crusher as claimed in claim 3, wherein other elastic members connect the cone support to the skirt.
6. The vibrating cone crusher as claimed in claim 1, wherein a weighted cap is fixed to an apex of the cone.
7. The vibrating cone crusher as claimed in claim 3, wherein the skirt is provided with weights.
8. The vibrating cone crusher as claimed in claim 1, wherein the cone is mounted rotatably on a vertical shaft fixed to the cone support, the cone being mounted through bearings on a shouldered sleeve adapted to slide along the vertical shaft, the shaft having a shoulder arranged such that a tight chamber is formed inside the sleeve between the shoulder of the shaft and of the sleeve, a channel being formed in the shaft and adapted to supply said chamber with pressurized liquid.
9. The vibrating cone crusher as claimed in claim 1, wherein the annular frame is constituted by a bottomless vessel, the ring being fixed therein said annular further comprising; a base on which is mounted the means for generating; and a skirt fixed at an upper end thereof on an edge of the base.
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10. The vibrating cone crusher as claimed in claim 9, wherein the means for
generating is constituted by unbalanced shafts each having a vertical axis, each shaft
bears two imbalanced weight disposed on either side of the base in such a way that the
vibration forces generated by a rotation of the unbalanced shafts are located in a
horizontal plane coinciding with or adjacent to a median plane of the base.
11. The vibrating cone crusher as claimed in claim 1, wherein the means for
generating is constituted by imbalance shafts having vertical axes coupled to one
another and to a motor by a mechanical drive system in which is incorporated a phase
shifting device, said phase shifting device comprising a rotary element coupled
directly to one of the imbalance shafts, at least one other imbalance shaft being
coupled to the rotary element or to the body of the jack, respectively, by a pulley and
belt drive system.
12. A vibrating cone crusher, substantially as herein described with reference to the
accompanying drawings.


Documents:

1027-mas-1996 description(complete).pdf

1027-mas-1996 drawings.pdf

1027-mas-1996 form-2.pdf

1027-mas-1996 form-4.pdf

1027-mas-1996 form-6.pdf

1027-mas-1996 claims.pdf

1027-mas-1996 power of attorney.pdf

1027-mas-1996 abstract.pdf

1027-mas-1996 correspondence others.pdf


Patent Number 247045
Indian Patent Application Number 1027/MAS/1996
PG Journal Number 13/2011
Publication Date 01-Apr-2011
Grant Date 25-Mar-2011
Date of Filing 11-Jun-1996
Name of Patentee FCB
Applicant Address 38 RUE De LA REPUBLIQUE, 93100 MONTREUIL
Inventors:
# Inventor's Name Inventor's Address
1 ALAIN CORDONNIER 28 BIS RUE NICOLAS LEBLANC, 59000 LILLE
2 RENAUD EVRARD 1693 RUE DES FEVES, 59226 LECELLES
3 JEAN-FRANCOIS ANDRE LE CHAMP LONG, 38210 LA RIVIERE
PCT International Classification Number B02C 2/00
PCT International Application Number N/A
PCT International Filing date
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 95.06964 1995-06-13 France