US2214289A

US2214289A - Feed distributor for gyratory crushers

Info

Publication number: US2214289A
Application number: US189713A
Authority: US
Inventors: Edgar B Symons
Original assignee: Nordberg Manufacturing Co
Current assignee: Nordberg Manufacturing Co
Priority date: 1938-02-10
Filing date: 1938-02-10
Publication date: 1940-09-10
Anticipated expiration: 1957-09-10

Description

. l0, 1940. E. B. sYMoNs FEED DISTRIBUTOR FOR GYRATORY CRUSHERS Filed Feb. 1o, 1938 2 Sheets-Sheet l Sept. l0, 1940. E. a. sYMoNs FEED DISTRIBUTOR FOR GYRATORY CRUSHERS 2 Sheets-Sheet 2 Filed Feb. 10, 1938 Patented Sept. 10, 1940 meer PATENT OFFICE FEEDA DISTRIBUTOR FOR GYRATORY CRUSHERS Edgar B. Symons, Hollywood, Calif., assignor to Nordberg Manufacturing Company, Milwaukee, Wis., a corporation of Wiso onsin Application February 1o, 193s, serial No. 189,713

9 claims. (Cisa-i0) My invention relates to an improvement in feeding devices for gyratory Crushers and has for one purpose the provision of means for mixing the coarse and fine feed whereby there will be substantially no segregation of coarse and fine particles.

Another purpose is the provision of means for distributing the feed substantially uniformly about the crushing cavity.

Other purposes will appear from time to time in the course of the specification and claims.

I illustrate my invention more or less diagrammatically in the accompanying drawings wherein:

Figure 1 is a vertical axial section through the device;

Figure 2 is a side elevation through the feed distributing structure;

Figure 3 is a plan View of the structure shown in Figure 2; and

Figure 4 is a section on the line 4-4 of Figure 2.

Like parts are indicated by like symbols throughout the specification and the drawings.

Referring tothe drawings, I is any suitable member upon which the crusher is supported. 2 indicates the circumferentially extending main frame of the crusher herein shown as terminating at its upper edge in an outwardly extending V flange 3. 4 is an upper frame or ring resting upon the ange 3 and apertured as at 5 to conform generally thereto in shape. 6 is an upper and I a lower spring abutment ring. Compressed therebetween are a plurality of coil springs 8. 9 are adjustable limit members or bolts extendingthrough the rings 6 or 'I and the flange Il.` IU are guides which are shown as having heads positioned above the flange 3 and body portions II extending downwardly through the flange 3 and the upper ring 6 and into the springs 8.

The ring 4 is shown as having a screwthreaded inner face I2 in mesh with the screwthreaded outer wall I3 of the bowl structure generally indicated as I4 to which the bowl liner or concave I5 may be secured, as by the hookshaped lugs I 6, U-bolts I'I, nuts I8 and shims I9. 20 indicates a downwardly converging wall associated with the portions I3 and I4.

2| is a spider structure extending to the fixed eccentric sleeve 22 which has an outwardly flared portion 23 upon which is mounted the bearing member 24 having the upwardly concave bearing plate 25, its upward concavity being generally spherical'and described about a center point X. 55v 26 indicates a crushing head havinga downwardly concave bearing. portion 2'I opposedto the spherical bearing 25. 28 is any' suitable? mantle mounted upon the head 26 and opposed to the bowl liner I5. l

29 is the crushing shaft, the upper portlon 29a of which is positioned within and secured to the head 26'. Its lower portion extendsdownwardly withinthe eccentric Sil-which has Vanv inner eccentric aperture 3| conforming generally to the r'shaft 29. 'Iheeccentric 36 is rotatably mounted within the eccentric sleeve 22 and may be rotated therein as by the gear` 34 inmesh with a pinion 32 on a shaft 33 which may be rotated in any suitable manner from a power source not herein shown. It will be understood that in response tothe rotation of the eccentric 3U the head 26 is gyrated upon the bearing 25.

35 generally indicates a feed distributing structure which includes a top plate 36 having aperipheral downwardly extending flange 31 scre'wf` threaded as at 38 and in mesh with the outwardly screw-threaded ring 39, which is secured.. to the head 26 as by .screws 46. 4I is an inclined face opposed to and generallyy conforming tothe x upper 'edge of the mantle 2B whereby when the plate 36 isl properly seated the mantlevis also held in position and thrust downwardly against y the outer conic face of the head 26. g d

Upwardly extending from the plateA 36 are shown radial upwardly Land outwardly extending y at members or plates 42 herein shown as integral with the top plate 36. Mounted on the inner Y edges of these plates 42 is a conic downwardly and inwardly inclined member 43 which may receive a removable conic spout 44. Extending: about the outer edges of the upper portions of the members- 42 is a second conic member 45. Positioned upon the upper edges of the members 42 is a surrounding spacing member or sleeve 46 with a top portion 41 which supports a downwardly and inwardly extending member 48 with-r a como removable wear taking member 49 posi'- tioned therewithin. The member 46 may be secured to the members 42 as by any suitable lugs 5U, 5I, with securing bolts 52. 53 is atransverse support mounted for example on vertical members 54 extending upwardly from the frame 4 and secured to it in any suitable way. I may all 20 provide any suitable adjustment, for example theA N screw-threaded portions 55 of the members 54 with nuts 56 on which rest sleeves 51 `secured to the member 53. 58 is a centrally located feed- It will be realized that whereas I have vdescribed and shown a practical and operative device, nevertheless many changes may be made in the size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic rather than as limiting me to my precise showing.

It will be understood that for example with reference to Figure 1, instead of the two members 43 and 48 but a single one may be employed under some circumstances, preferably of somewhat greater height in relation to its width than either of the two members 43 and 48 as shown.

The use and operation of my invention are as follows: l The material to be fed is delivered downwardly through the normally fixed spout 58 by any suitable means which do not of themselves form part of the present invention. The parts are so proportione'd that when the eccentric 30 is rotated and the head is gyrated, the

members

44 and 49 also gyrate. They are located above the center X. The gyratory excursion, however, is of such length in relation to the dimensions of the memstantially mixed together and are delivered from b er 58 that the cylindrical spout 58 is at all times centered above the upper edge of the upper conic spout 49 whereby all the material fed to the .crusher passes downwardly through the conic member 49. When the material is fed down along a conveyor it frequently happens that the ne and the coarse particles segregate. Therefore, the stream of particles as it is delivered downwardly through the chute 58 may bef substantially segregated with the nes going down one side of the chute and with the coarsedown the other.

The effect of the gyration of the member 49 is to cause a lateral movement of the particles whereby the ne and the coarse particles are subthe lower edge of the member 49 in a substantially uniformly mingled condition. This uniformly mingled feed is thereby delivered to the upper portion of the lower conic spout 44. At minimum feed the Volume so delivered will be sufficient to pass entirely downwardly through the member 44 and into the spaces between the members 4| and downwardly upon the upper surface of the plate 36. Not only is the feed uniform in its mixture of fine and coarse, but it is also uniformly distributed through the four openings or spaces between adjacent members 42 and is outwardly directed or iiows along the face 36 and passes over the lip of the member 31 and` downwardly into the crushing cavity dei-ined by the members l5 and 28. Where there is excess feed someparticles Will flow over the upper edge of the member 44 and will then fall downwardly against the memupon the stream of particles passing outwardly over the member 36.

In any case, few if any particles can escape directly to the crushing cavity without first striking .':f or passing over the member 36. This is important since in the type of crusher herein shown an excess gravital acceleration of the particles is to be avoided and the machine is designed to crush `particles which start to fall downwardly into the "crushing cavity from about the level of the top of the plate 36. Thus not even the overflow of the spout 44 can drop directly into the crushing zone but is directed by the member 45 inwardly as well as downwardly and in anv case the entire feed is directed upon the top of the head or upon the plate 3B before passing over the edge of the member 31 into the crushing cavity.

A primary advantage of my device is the mixing of the fine and coarse particles' as they are delivered downwardly into the machine. There is sufficient gyration of the

members

49 and 44 to effect this mixing and to cause an even delivery of the material so mixed throughout the periphery of the member 31. In actual crushing, an

f even mixture of ne and coarse particles delivered to the crushing zone has a great effect upon the shape of the particles crushed. If a certain proportion of the voids between the coarser particles are filled with fine particles, the particles discharged from the Crusher are more cubic in shape. This is a desirable pointin mining practice as well as in quarry practice. v

As a further result, the proportion of undesired nes or particles below a predetermined size is greatly reduced.

A further important advantage to be obtained from the mixing of ne and coarse particles and also from the even distribution of the feed around the periphery of the crushing cavity is the evening up of the power applied in running the Crusher, with an elimination of surges and a saving on gear teeth wear and on the general wear of the machine itself. When surging takes place due to uneven feed, especially with light loads, the centrifugal force exerts itself where the load is lightest with the effect that the distance between the head and the cone is materially reduced and an excessive amount of extremely ne material is discharged from the machine. In instances where a product relatively free from. fines is desired, such a result may be disastrous.

It is important that the members 43 and 48 and especially the member 43 have open interiors in order that the particles which are impacted by the spouts as the head is gyrated may travel freely throughout the interior of the spouts. Since a major purpose of my invention is to cause the normal gyration of the head to create a homogeneous mixture of particles of mixed sizes, any obstruction within the interior of the spouts is undesirable. Hence my employment of the open and generally tubular or slightly conic member 49 andthe open truncated hollow cone 44. The supporting members 42 are so located that they are not contacted by the falling particles until after the mixture has been completed by the lateral blows delivered by the members 49 against the falling particles and by the additional mixing effect of the lateral movement of the member 44.

I claim:

1. In a gyratory Crusher, in combination with a crushing head and means for gyrating it, a normally fixed feed spout positioned above said head, a feed distributing member mounted on and gyrating with said crushing head, and including a gyrating spout mounted on said head, said spout being coaxial with the axis of the head, the upper edge of said spout being located adjacent the lower edge of said fixed spout and being of sulcient diameter to maintain a constant vertical alinement with said fixed spout at all positions of the head, 'said spout having an open interior, and an additional downwardly converging spout located below and in axial alinement with said first mentioned gyrating spout and having a discharge edge spaced upwardly from said crushing head, the upper aperture of said additional spout being of sufficiently large diameter to receive substantially all of the particles delivered past the lower edge of the upper spout.

2. In a gyratory crusher, a crushing head, means for delivering material to a zone above the top of said head, an open spout, the interior of which is unobstructed from top to bottom thereof, vertically alined with said Zone, mounted on and gyrating with said head, said spout being coaxial with the axis of the'head, said spout being adapted to receive and surround the particles falling from said zone toward said head, and means for gyrating said spout, through an excursion of sufficient amplitude to cause said spout to strike laterally against a substantial proportion of the falling particles, prior to their contact with the head, said head having a laterally extending feed receiving portion underlying and extending outwardly beyond the discharge edge of said spout.

3. In a gyratory crusher, a crushing head, means for delivering material to a zone above the top of said head, an open spout, vertically alined with said zone, mounted on and gyrating with said head, said spout being coaxial with the axis of the head, said spout being adapted to receive and surround the particles falling from said Zone toward said head, meansfor gyrating said spout through an excursion of sufficient amplitude to cause said spout to strike laterally against a substantial proportion of the falling particles, prior to their contact with the head, said head having a laterally extending feed receiving portion underlying and extending outwardly beyond the discharge ledge of said spout, and an additional conic spout mounted on said head and alined with the open bottom of said spout, the lower edge of said conic spout being upwardly spaced from the top of the head, whereby the particles delivered from the spout to the conic spout are fed to the top of said head, the upper aperture of said lower spout being of greater diameter than the lower aperture of said upper spout.

4. In a gyratory crusher, a crushing head, means for delivering material to a Zone above the top of said head, an open spout, vertically alined with said zone, mounted on and gyrating with said head, said spout being coaxial with the axis of the head, said spout being adapted to receive and surround the particles falling from said zone toward said head, means for gyrating said spout through an excursion of sufficient amplitude to cause said spout to strike laterally against a substantial proportion of the falling particles, prior to their Contact with the head, said head having a laterally extending feed receiving portion underlying and extending outwardly beyond the discharge edge of said spout, an additional conic spout mounted on said head and alined with the open bottom of said spout, the lower edge of said conic spout being upwardly spaced from the top of the head, whereby the particles delivered from the spout to the conic spout are fed to the top of said head, the upper aperture of said lower spout being of greater diameter than the lower aperture of said upper spout, and a generally conic guard surrounding said additional spout and located at substantially the same horizontal plane and outwardly spaced therefrom and adapted to deliver particles to the top of said head.

5. In a gyratory crusher, in combination with a crushing head and means for gyrating it, a feed distributing means, including an upper spout and a lower spout, each suchfspout having openings at top and bottom; the axes of' said spouts coinciding with 4the axis of said head, said spouts being mounted on and moving unitarily with said head, the interiors of said spouts being unobstructed from` top to bottom, ythe diameter of the lower aperture of the upper spout being not greater than the diameter of the upper aperture of the lower spout, the head having a laterally extending feed receiving portion underlying and extending outwardly beyond the discharge edge of the lower aperture of the lower spout.

6. In a gyratory crusher, in combination with a crushing head and means for gyrating it, a feed distributing means, including an upper spout and a lower spout, each such spout having openings at top and bottom, the axes of said spouts coinciding with the axis of said head, said spouts being mounted on and moving unitarily with said head, the interiors of said spouts being unobstructed from top to bottom, the diameter of the lower aperture of the upper spout being not greater than the diameter of the upper aperture of the lower spout, the head having a laterally extending feed receiving portion underlying and extending outwardly beyond the discharge edge of the lower apert e of the lower spout, said spouts being general y conic, the lower aperture of each spout being of less diameter than its upper aperture.

7. In a gyratory crusher, in combination with a crushing head and means for gyrating it, a feed distributing means, including an upper spout and a lower spout, each such spout having openings at top and bottom, the axes of said spouts coinciding with the axis of said head, said spouts being mounted on and moving unitarily with said head, the interiors of said spouts being unobstructed from top to bottom, the diameter of the lower aperture of the upper spout being not greater than the diameter of the upper aperture of the lower spout, the head having a laterally extending feed receiving portion underlying and extending outwardly beyond the discharge edge of the lower aperture of the lower spout, and an additional deflector member surrounding said lower spout and spaced radially outwardly therefrom.

8. In a gyratory crusher, in combination with a crushing head and means for gyrating it, a feed distributing means, including an upper spout and a lower spout, each such spout having openings at top and bottom, the axes of said spouts coinciding with the axis of said head, said spouts being mounted on and moving unitarily with said head, the interiors of said spouts being unobstructed from top` to bottom, the diameter of the lower aperture ofthe upper spout being not greater than the diameter of the upper aperture of the lower spout, the head having a laterally extending feed receiving portion underlying and extending outwardly beyond the discharge edge of the lower aperture of the lower spout, and a supporting connection for said spouts, including a plurality of generally radial members upwardly extending from the crushing head.

9. In a gyratory crusher, in combination with a crushing head and means for gyrating it, a feed distributing means, including an upper spout and a lower spout, each such spout having openings at top and bottom, the axes of said spouts coinciding with the axis of said head, said spouts being mounted on and moving unitarily with said head, the interiors of said spouts being unobstructed from top to bottom, the diameter of the lower aperture of the upper spout being not upper aperture greater than the diameter of the of the lower aperture of the lower spout, the axis of the head being inclined, the center of gyration of the head being located above the top of the head but below the lowest of said spouts.

EDGAR B. SYMONS.