US3250478A

US3250478A - Wear ring and locking nut structure for gyratory crushers

Info

Publication number: US3250478A
Application number: US325590A
Authority: US
Inventors: Lawrence B Olson
Original assignee: Nordberg Manufacturing Co
Current assignee: Nordberg Manufacturing Co
Priority date: 1963-11-22
Filing date: 1963-11-22
Publication date: 1966-05-10
Anticipated expiration: 1983-05-10

Description

May 10, 1966 1.. B. OLSON 3,250,473

WEAR RING AND LOCKING NUT STRUCTURE FOR GYRATORY CRUSHERS Filed Nov. 22, 1963 2 Sheets-Sheet 1 xln i i S y 1966 1.. B. OLSON 3,250,478

WEAR RING AND LOCKING NUT STRUCTURE FOR GYRATORY CRUSHERS Filed Nov. 22, 1963 2 Sheets-Sheet 2 f I .21 I .3

INVENTOR.

United States Patent 3,250,478 WEAR RING AND LOCKING NUT STRUCTURE FOR GYRATORY CRUSHERS Lawrence B. Olson, Milwaukee, Wis, assignor to lflordberg Manufacturing Company, Milwaukee, '15., a

corporation of Wisconsin Filed Nov. 22, 1963, Ser. No. 325,59i) 7 Claims. (Cl. 241-215) This invention relates to an improvement in gyratory crushers and has for a particular purpose the provision of an improved holding means for the mantle of a gymtory crusher having a generally conic head.

Another purpose is to provide an improved wear ring for holding the crusher mantle in place and for absorbing wear and for protecting the locking nut of the crusher head.

Another purpose is to provide such a wear ring which, while massive and wear resistant, can readily be removed and replaced when worn.

Another purpose is to provide an improved locking nut and wear and thrust ring assembly for such crushers.

Another purpose is to provide means effective to maintain the necessary downward thrust against the upper edge of the crusher mantle, while protecting the locking nut or locking assembly,

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

The invention is illustrated more or less diagrammatically in the accompanying drawings wherein:

FIGURE 1 is a vertical section through a crusher of the type described illustrating the invention;

FIGURE 2 is an enlarged section through a portion of the crusher illustrating one form of the invention;

FIGURE '3 is a section, similar to FIGURE 2, showing a modified form of the invention;

FIGURE 4 is a section, similar to FIGURE 2, showing yet a further form of the invention; and

FIGURE 5 is a section, similar to FIGURE 2, showing still a further form of the invention.

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

Referring to the drawings, it will be understood that the details of the crusher frame do not of themselves form part of the present invention. It includes, however, a circumferential outer frame member and a central hub 11, which may be suitably connected by supporting means, not herein shown. Rotatable in the hub 11 is an eccentrically apertured sleeve 12 which may be suitably rotated through a drive, not herein shown in de tail, since it does not of itself form part of the present invention. It will be understood that the sleeve 12 is eccentrically apertured to receive a crusher shaft 13 upon which is mounted a crusher head 14. The shaft includes also an upward extension 15, externally screw-threaded as at 16. A mantle 17 isnormally seated on the outer conic face 17a of the head 14.

Surrounding the mantle 17 is a bowl liner 20 which, with the mantle, defines a crushing cavity. The bowl liner may be supported on a bowl 21, which, in turn, is preferably adjustably secured to a bowl ring 22, movably mounted on the upper edge of the outer circumferential frame member 10.

In the use of the device it will be understood that as the eccentric sleeve 12 rotates the shaft 13 is gyrated. The effect is to move any point of the mantle 17 toward and away from the opposite surface of the bowl liner 20, to provide the crushing nip effective to crush material fed downwardly into the crushing space defined by the mantle and bowl liner. It is exceedingly important to hold the mantle 17 firmly in position on the crushing head 14 and,

also, to take up any loosening or expansion or distortion of the mantle. Such mantles'are frequently, even customarily, made of manganese steel which tends to peen or deform or stretch somewhat under impact.

In order to hold the mantle in position and take up any such change in form I employ a locking nut, generally indicated at 25, which is threaded onto the extension 15. It will be understood that by rotation of this locking not a downward thrust against the upper edge of the mantle 17 can be maintained. It is important, however, that this thrust be constantly and uniformly maintained. I find it advantageous to employ a massive thrust ring 28 which is formed to engage the upper edge of the mantle 17 and an appropriate face 25a of the locking nut 25, to provide a direct thrust between the lower or thrusting surface of the locking nut and the upper or thrust receiving surface of the mantle 17. As shown, the ring 28 may be thicker than the mantle.

With reference, for example, to the form of FIGURE 2, the lower edge of a thrust ring 30 is provided with a generally conic thrust surface 31 which may be generally perpendicular to the outer conic surface of the mantle 17. Similarly, another conic surface 32, on the upper edge of the ring 30, is opposed to the generally conic surface 25a on an upward and outward projection of the locking nut 25. Since, as is clear from the drawings, the ring 30 is in the line of flow of material into the crushing cavity, and is therefore subjected to continuous wear, it is important that this ring he of abrasion resisting material, and be of substantial mass. I find that a practical material is manganese steel, although other wear resistant materials such as high carbon chrome may be satisfactory. It is important that the ring 30 engage the conic surface 25a of the locking nut and the upper conic surface 17a of the mantle, but be otherwise free from contact with the head or the locking assembly. Thus I provide between the upper, inner portion of the ring 30 and the opposed parts of the locking nut 25 a free space 30a. The thrust connections of the ring are therefore limited to the areas of its upper conic surface 32, and its lower conic surface 31. It is of suificient mass to stand the battering which it will inevitably get, and it can, of course, be readily re moved and replaced by the suitable upward withdrawal of the locking nut 25. Lugs 33, illustrated in dotted lines in FIGURE 2, may be provided on the ring 30, if desired.

With reference to the form of FIGURE 4, I illustrate a corresponding thrust ring 40 with a lower thrust surface 41 and an upper thrust surface 42. Free space 40a is provided between the ring 40 and the stem of the locking nut 25. Lugs 43, illustrated in dotted lines, may be provided if desired.

It will be observed that in both forms the

rings

30 and 40 contact only the thrusting surface of the locking nut and the thrust receiving surface of the mantle. It will also be observed that these thrust receiving surfaces are all generally conic and are all generally perpendicular to the generally conic wearing surface of the mantle.

With reference to the form Of FIGURE 3, I find that, under some circumstances, it is practical and advantageous to employ the ring 30- or its equivalent, not merely to exert a thrust against the upper edge of the mantle but to protect the locking nut 25 from any substantial battermg or wear by the material passing into the crushing cavity or undergoing crushing. I therefore employ a thrust ring 50 which may be identical with the ring 30 except that it is extended upwardly and inwardly, as at 51, to provide, in effect, a shield for the upper portion of the locking nut. Between this shield portion and the upper part of the locking nut I may leave a space 52. This space, if left open, will :tend to fill up with dust or particles of the material being crushed. I find that it may be advantageous to fill this open space with a mateassen /a 3 rial which can be readily poured, such as zinc, poured in liquid form, or a plastic, such as the plastic sold under the trademark Nordback. This material flows easily and sets promptly, and hardens into a firm mass of suflicient strength and abrasion resistance to protect the locking nut.

Referring to FIGURE 5, I illustrate a .variant form of ring 60 which constitutes a modification of the ring 40 of FIGURE 4. It includes an upward extending shield portion 61 which defines, with the upper part of the locking nut 25, an open space 62. As in the form of FIG- URE 3, this space may also be filled, for example with zinc, or with a suitable plastic.

In both the forms of FIGURES 3 and 5, the locking nut 25 may have outwardly extending lugs 55 which are effective to interlock the nut with the

rings

50 and 60 through grooves or cavities 56 in the adjacent surfaces of the nut. The ring and nut will then rotate together. In like manner there may be a similar lug and cavity interlock between the

rings

50 and 60 and the mantle v17 for simultaneous rotation of these members, for example as at 63, in FIGURE 5, which fits in a socket 64 in the rear of face 17a on the mantle. The lug or projection 63 may be integral with ring 60 or it may be separately formed and welded on.

It will be realized that, whereas I have described and illustrated 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.

What is claimed is:

1. In a gyratory crusher having a crushing cavity defined by a bowl liner and mantle, and for use between the mantle and locking nut of such a gyratory crusher, the mantle having an upwardly and outwardly extending generally conic top thrust receiving surface, the locking nut having an upwardly and outwardly extending and downwardly facing generally conic thrust delivering surface, a massive wear receiving ring opposed to the bowl liner adapted to be positioned therebetween, said ring having a lower conic surface conforming to the upper surface of the mantle and an upper conic surface conforming to the thrust surface of the locking nut, said ring having a lower portion surrounding and adjacent but spaced outwardly from the opposed lower portion of the locking nut.

2. The structure of claim 1 characterized by and including an interlock between the wear ring and the mantle.

3. The structure of claim 2 characterized by and including interlocks between the wear ring and the mantle delivering surface, a massive wear receiving ring adapted to be positioned therebetween, said ring having a lower conic surface conforming tothe upper surface of the mantle and an upper conic surface conforming to the thrust surface of the locking nut, the wear ring including a shield portion extending upwardly about the locking nut and formed and adapted to protect the exterior of the locking nut from material entering the crushing cavity.

6. The structure of claim 5 further characterized by the use of a body of filling material located in a space between the shield portion of the wear ring and the upper outer surface of the locking nut. t

7. For use between the mantle and locking nut of a gyratory crusher, the mantle having an upwardly and outwardly extending generally conic top thrust receiving surface, the locking "nut having an upwardly and outwardly extending and downwardly facing generally conic thrust delivering surface, a massive wear receiving ring adapted to be positioned therebetween, said ring having a lower conic surface conforming to the upper surface of the mantle and an upper conic surface conforming to the thrust surface of the locking nut, the wear ring being substantially thicker than the mantle, the wear ring including-a lower portion surrounding and adjacent but spaced outwardly from the opposed lower portion of the locking nut.

References Cited by the Examiner UNITED STATES PATENTS 2,634,061 4/1953 Rumpel 241-214 2,635,818 4/1953 Zoerb 24l299 X 2,814,450 11/1957 Gruender 241-208 X 2,971,705 2/1961 Werner 241-300 X ROBERT C. RIORDON, Primary Examiner.

J. SPENCER OVERHOLSER, LESTER M. SWINGLE,

Examiners.

D. KELLY, Assistant Examiner;

Claims

1. IN A GYRATORY CRUHSER HAVING A CRUSHING CAVITY DEFINED BY A BOWL LINER AND MANTLE, AND FOR USE BETWEEN THE MANTLE AND LOCKING NUT OF SUCH A GYRATORY CRUSHER, THE MANTLE HAVING AN UPWARDLY AND OUTWARDLY EXTENDING GENERALLY CONIC TOP THRUST RECEIVING SURFACE THE LOCKING NUT HAVING AN UPWARDLY AND DOWNWARDLY EXTENDING AND DOWNWARDLY FACING GENERALLY CONIC THRUST DELIVERING SURFACE, A MASSIVE WEAR RECEIVING RING OPPOSED TO THE BOWL LINER ADAPTED TO BE POSITIONED THEREBETWEEN, SAID RING HAVING A LOWER CONIC SURFACE CONFORMING TO THE UPPER SURFACE OF THE MANTLE AND AN UPPER CONIC SURFACE CONFORMING TO THE THRUST SURFACE OF THE LOCKING NUT, SAID RING SPACED A LOWER PORTION SURROUNDING AND ADJACENT BUT SPACED OUTWARDLY FROM OPPOSED LOWER PORTION OF THE LOCKING NUT.