US2054326A - Water seal for use with crushing machinery - Google Patents

Description

Sept. 15, 1936. H, A JACQBSON 2,054,323- wATEE SEAL Fon UsE w1TE"'cRUs H1NG MACHINERY y Filed Nov. 27, 1953 I Patented Sept. 15, 1936 UNITED STATES PATENT OFFICE WATER SEAL FOR USE WITH CRUSHING MACHINERY Application November 27, 1933, Serial No. 699,916

11 Claims.

My invention relates to an improvement in sealing means and shown herein as applied to sealing or protecting the main supporting bearing of the head of a gyratory cone Crusher. It will be understood, however, that it may be applied to a variety of mechanisms and for a variety of purposes. One proposition is the provision of improved means for preventing the access of dust, dirt, grit or the like to an enclosed bearing. Another object, in relation to the specific application of the invention shown in the present specication is the prevention of access of foreign material to the main supporting bearing of a gyratory cone crusher. Other objects will appear from time to time in the course of the specification and claims.

I illustrate my invention more or less diagrammatcally in the accompanying drawing, which represents a vertical axial section through a gyratory cone crusher with my invention applied thereto.

Referring to the drawing, A generally indicates any suitable base or support of masonry, concrete or the like.

Mounted upon the base A is the main frame B having bottom flange B1, which may be bolted or otherwise secured to the base A. The main frame B is provided with an upper flange Bs and is formed at one side with a penetrating sleeve B2. Supported upon and spaced generally centrally Within the main frame B is a central vertical sleeve B3. It may be outwardly enlarged or extended at its upper end as at B4. It may be connected to the frame B by generally radial spider members B5.

Mounted within the sleeve B2 in any suitable manner is a bearingsleeve C, in which is rotatably mounted drive shaft C1, which may be driven as by the pulley C2. It terminates at its inner end in the pinion C3 in mesh with the bevel gear C4, which in turn is keyed to the eccentrically apertured shaft C5 which rotates within a bushing C6 in the sleeve B3.

Mounted within the eccentric aperture Crl of the shaft C5 is a bushing C3, in which rotates a shaft D, at the upper end of which is mounted the crushing head D1. This head D1 has a lower spherical bearing surface indicated at D2. It rests upon the correspondingly surfaced bearing plate D3, which in turn is mounted upon a cover plate D4, which is seated upon the upper outer edge of the enlargement B4 of the central vertical sleeve B3. It will be understood that in response to rotation of the shaft C1, the eccentric shaft C5 is rotated through the pinion C3 and the gear C4.

The rotation of the shaft C5 rotates the aperture n in which is seated the shaft D. This rotation imparts a gyratory movement to the head D1. In the course of this movement the head seats upon and moves upon the spherical bearing formed by the member D3. The parts are so proportioned that the head D1 acts as if it were suspended at the point indicated as X above the top of the head proper. It will be noted also that the head D1 has an umbrella-like extension D5, which is down turned as at D6 and extends downwardly about the cover plate D4.

In order to protect' the bearing'formed by the opposed surfaces D2 and D3, I provide the following structure. E indicates a circumferential sump formed inthe cover plate D4. The sump is bounded inwardly by the upwardly and outwardly inclined face El of the plate D4. It is bounded exteriorly by the upward and inward extension E2. Positioned between the two is an additional upward extension E3 of less height than E1 or E2. Extending downwardly into the space between E1 and E3 is the skirt E4, the upper edge of which is shown as secured tothe head D1, the lower edge of which is at all times and' at all positions of the head below the plane dened by the upper edge of the member E3. This will be clear from the drawing since the skirt E4 is at the left side of the drawing shown in its highest position. In

order to maintain a liquid seal, I keep the space between the members E1 and YE3 at all times filled with a liquid, for example, water. To obtain this result, I employ a water supply pipe G extending from any suitable source of `water to a circumferential supply pipe G1 positioned at about the level of the upper edge of the partition E3. The circulation of the water is indicated in arrows in the drawing and the water is so supplied as to keep at all times a liquid seal for the lower edge f the member E4. Under many circumstances it may be preferable to maintain a circulation of Water over the lip or upper edge of the partition E3. The arrows indicate the direction of this circulation and it is advantageous in that any foreign matter, dust or the like, which reaches the surface of the water is carried off by this circulation. E5 is any suitable overflow pipe for this water, one or more of such pipes being used, the pipe or pipes being in communication with the gutter E6 between the members E2 and E3.

It will be observed from the drawing that the lower portion of the member E4, that portion which penetrates the liquid E, is formed concentrically with the spherical bearing surface or member D3. The purpose of this is to prevent any displacement of the liquid in response to the movement of the member E4, to prevent the member or skirt E4 from throwing fluid out of the sump or causing an agitation thereof which would prevent the normal trickle or flow of the fluid over the lip E3. It will be observed, from the right hand of the figure, that even when the head is at its lowest the generally vertical portion of the member E4 does not penetrate the uid, the fluid being penetrated only by the inturned spherical lower edge portion.

The bearing D3 may be supplied by oil in any suitable manner as, for example, by an oil passage Hlv extending axially up the shaft D, and a passage or passages H1 extending through the head to supply oil to the opposed surfaces of D2 I may nd it desirable toprevent the escape of any of this oil over the edge of the bearing D3. I indicate for example a circumferential oil groove H2 formed in the member D3, which communicates as by the oil passages H3 with the space below the cover D4. The oil isV to be wiped off the bearing face D2 and is returned through the oil passage or passages H3 to the inside of the machine and hence back to whatever oil reservoir is employed. I'hus no oil is permitted to escape over the edge of the bearing D3 to be carried off and wasted with the water in the drain pipe. Any suitable means may be employed, to be understood, for maintaining the oil circulation and for cleaning the oil.

Any suitable crushing member or mantle J is mounted upon the head D1. The details of this mantle and of the mounting therefor are not shown, since they do not of themselves form part of the present invention. The crushing surface of the mantle J is opposed to a concave or bowl liner J1, which is mounted on anyV suitable bowl structure J2, which in turn is provided with a circumferential ange J3 adapted to seat upon the flange B1 of the main frame. J4 indicates springs adapted normally to hold the bowl fixed in relation to the main frame B.Y

It will be lrealized that whereas I have described and shown a practical and operative device, nevertheless many changes may be made in size, shape, number and disposition of parts without departing from the spirit of my invention. I therefore wish my drawing and description to be taken as in a broad sense illustrative or diagrammatic rather than as limiting me to the precise structure herein described and shown.

Y For instance, whereas I show it as applied to a gyratory cone crusher, it will be realized that a similar seal may be applied to other types ofV crushers or to entirely different structures `where it is necessary to protect an inner bearthe head D1 is gyrated upon the spherical surface bearing D3. If the crusher is employed to crush rock, it will be understood that finely divided particles, dust and grit ll the air about the crusher. It is in the highest degree important that such material be denied access to the bearing surface, as otherwise the bearing will rapidly burn out. The present inventionis one solution of this problem.

The direct access of any large particles is made diflicult by the tortuous passage formed by the overhanging umbrella D5 D6, and the interpenetrating partitions E2, E4 and E1. In addition to this tortuous passage I provide a positive water seal which always overlaps the lower edge of the skirt E4. Not merely do I provide a water seal, but I may maintain a positive outward circulation of water which carries off, preferably outwardly, anyv dust or grit which reaches the surface of the water in the sump E. A tortuous passage and the Water seal and the circulation of the water combine to deny the access of outside dirt or grit to the bearing surface. It is further advantageous, in order to prevent oil Wastage, that no oil be allowed to ow over the outer edge of the bearing D3. I therefore provide the circumferential oil wiping pasages H2, whereby the oil which would otherwise escape over the edge of the bearing D3 is allowed to pass down the passages H3 to the interior of the machine, Where it returns to the general oil circulation system of the device. It will be understood that any suitable means are employed for maintaining a closed circulation of the oil, the oil being filtered or purified in any suitable manner.

I claim: Y

l. In a gyratory crusher, a crushing head and means for gyrating it, a spherical support for said head, said head and support being provided with opposed spherical bearings, means for supplying oil to said opposed bearings, means for withdrawing oil from said bearings adjacent the periphery thereof, a sump extending outwardly about said bearings, an apron normally fixed in relation to said head forrpenetrating said sump, means for supplying a flow of liquid to said sump within said apron, an overflow lip in `said sump outside of said apron and extending circumferentially thereabout, gutter means positioned Without said overfiow lip, and an exhaust passage for drawing off liquid from said gutter means, the above described system of circulation through the sump being independent of the means for supplying oil and withdrawing oil from the spherical bearings, the level of liquid in the sump being defined by the overflow lip and being sufficiently high at al1 times to overlap the lower edge of the apron, and an upwardly extending baille wall which extends upwardly about the sump and overlaps and closely approaches the apron.

2. In a gyratory crusher, a crushing head and means for gyrating it, a support for said head, head and support being provided with opposed bearings, means for supplying oil to said opposed bearings, meansY for withdrawing oil from said bearings, a sump extending outwardly about said bearings, an apron, normally fixed in relationV to said head, adapted to penetrate said sump, means for supplying a flow of liquid to said sump, an overflow lip in said sump, outside of said apron, extending -circumferentially thereabout, the effective overflow level of said lip being lower than the level of the bearings, gutter means positioned without said overflow lip, and exhaust passage means for drawing off liquid from said gutter means, the above described system of circulation through the sump being independent of the means for supplying oil and withdrawing oil from the bearings, the level of liquid in the sump being dened by the overflow lip and being suflioiently high at all times to overlap the lower edge of the apron at vall positions of the apron.

3. In a gyratory crusher, a crushing head and means for gyrating it, bearing means for said head, and means for protecting said bearing means from dust, including a sump formed in the head support, an apron, normally fixed in relation to said head, adapted to penetrate said sump, means for supplying a flow of liquid to said sump, an overflow lip in said sump, extending circumferentially thereabout, gutter means positioned without said overflow lip, and exhaust passage means for carrying off said liquid from said gutter means, the level of liquid in the sump being defined by the overflow lip, and being sufciently high at all times to overlap the lower edge of the apron at all positions of the apron, but being lower than the level of the adjacent portion of the bearings.

4. In a gyratory crusher, a crushing head and means for gyrating it, bearing means for said head and means for supplying oil thereto, and means, independent of said oiling means, for limiting the access of dust to said bearing means, including a sump, an apron on said head, penetrating said sump, a discharge lip, surrounding and positioned outwardly of said apron and out of contact with said apron at all times, an inner wall for said sump extending substantially above the horizontal plane of said discharge lip, and adapted to prevent access of the liquid to the bearing means, means for delivering a liquid to said sump at a point within the periphery of said apron, and for thereby causing a circulation of said liquid outwardly about the lower edge of said apron and over said discharge lip, the lower edge of said apron being at all times below the horizontal plane of the discharge lip, and run-ofiu means for the liquid escaping over the discharge lip.

5. In a gyratory crusher, a crushing head and means for gyrating it, bearing means for said head and means for supplying oil thereto, and means, independent of said oiling means, for limiting the access of dust to said bearing means, including a sump, an apron on said head, penetrating said sump, a discharge lip, surrounding and positioned outwardly of said apron and out of contact with said apron at all times, an inner wall for said sump extending substantially above the horizontal plane of said discharge lip and substantially overhanging the sump and the liquid therein, and adapted to prevent access of the liquid to the bearing means, means for delivering a liquid to said sump at a point within the periphery of said apron, and for thereby causing a circulation of said liquid outwardly about the lower edge of said apron and over said discharge lip, the lower edge of said apron being at all times below the horizontal plane of the discharge lip, and run-ofi means for the liquid escaping over the discharge lip.

6. In a gyratory crusher, a crushing head and means for gyrating it, bearing means for said head and means for supplying oil thereto, and means, independent of said oiling means, for limiting the access of dust to said bearing means, including a sump, an apron on said head, penetrating said sump, a discharge lip, surrounding and positioned outwardly of said apron and out of contact with said apron at all times, an inner wall for said sump extending substantially above the horizontal plane of said discharge lip, and adapted to prevent access of the liquid to the bearing means, means for delivering a liquid to said sump at a point within the periphery of said apron, and for thereby causing a circulation of said liquid outwardly about the lower edge of said apron and over said discharge lip, the lower edge of said apron being at all times below the horizontal plane of the discharge lip, and runoff means for the liquid escaping over the discharge lip, and a shield, positioned outwardly of said apron, but out of contact therewith, said shield overlying the run-off means and the discharge lip.

7. In a gyratory crusher, a crushing head and means for gyrating it, stationary bearing means for said head and means for supplying oil thereto, and means, independent of said oiling means, for limiting the access of dust to said bearing means, including a portion of said stationary bearing means, a sump, a discharge lip, means for delivering a liquid to said sump, and for causing a constant flow of liquid over the edge of said discharge lip, a circumferential, imperforate apron, mounted on the head, and extending downwardly into the sump to a level below the plane dei-ined by the surface of the water and the discharge lip, at all positions of the head, and run off means for the liquid escaping over the discharge lip, adapted to guide said liquid along a path separated from the bearing means.

8. In a gyratory crusher, a crushing head and means for gyrating it, bearing means for said head and means for supplying oil thereto, and means, independent of said oiling means, for limiting the access of dust to said bearing means, including a sump, a discharge lip, means for delivering a liquid to said sump, and for causing a constant flow of liquid over the edge of said discharge lip, a circumferential, imperforate apron, mounted on the head, and extending downwardly into the sump to a level below the plane defined by the surface of the water and the discharge lip, at all positions of the head, and run off means for the liquid escaping over the discharge lip, adapted to guide said liquid along a path separated from the bearing means, said apron terminating in a lower portion generally concentric with the center of gyration of the head, said concentric portion of the apron intersecting the surface of the liquid at all positions of the head.

9. In a gyratory crusher, a head mounted for movement about a predetermined center, supporting means for said head, and a seal for said supporting means including a sump, a body of liquid in said sump, and an apron, depending from said head and penetrating said sump, said apron including a spherical portion generally concentric with the center of movement of the head, said spherical portion at all times intersecting the surface of the liquid, at all normal crushing positions of the head.

10. In a gyratory crusher, a head mounted for movement about a predetermined center, supporting means for said head, and a seal for said supporting means including a sump, a body of liquid in said sump, and an apron, depending from said head and penetrating said sump, said apron including a spherical portion generally concentric with the center of movement of the head, and a circumferential generally vertical portion, from the lower edge of which the spherical portion inwardly extends, said spherical portion at all times intersecting the surface of the liquid, at all normal crushing positions of the head.

11. In a gyratory crusher, a head mounted for gyratory movement about a predetermined center, supporting means for said head including a generally spherical bearing surface, and a seal for said supporting means including a sump, a body of liquid in said sump, and an apron depending from said head and penetrating said sump, said apron including a portion generally parallel to said spherical bearing surface and concentric with the center of movement of the head, said parallel portion of the apron intersecting the surface of the liquid at all normal crushing positions of the head.

HENRY A. JACOBSON.

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