US3614004A - Concave ring for cone crushers - Google Patents

Concave ring for cone crushers Download PDF

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Publication number
US3614004A
US3614004A US827712A US3614004DA US3614004A US 3614004 A US3614004 A US 3614004A US 827712 A US827712 A US 827712A US 3614004D A US3614004D A US 3614004DA US 3614004 A US3614004 A US 3614004A
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United States
Prior art keywords
crushing
corrugations
annular
ring
ridges
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Expired - Lifetime
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US827712A
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English (en)
Inventor
Edgar S Burkhardt
James D Torrence
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Allis Chalmers Corp
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Allis Chalmers Corp
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Assigned to CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE, WOODS KATHLEEN D., AS TRUSTEE reassignment CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING ASSOCIATION AS TRUSTEE SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ALLIS-CHALMERS CORPORATION A DE CORP.
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C2/00—Crushing or disintegrating by gyratory or cone crushers
    • B02C2/005—Lining

Definitions

  • a crusher is disclosed of the type having a crushing chamber defined between a vertical conical head and a surrounding replaceable concave ring.
  • the inside of the concave ring is provided with a stepped surface comprising alternately, annular crushing surfaces and annular connecting surfaces
  • the inside of the concave ring is also provided with vertical corrugations defined by alternate grooves and ridges which begin at the top and material inlet end of the concave ring, and extend downwardly to one of the annular crushing surfaces at a horizontal level above at least the lowermost annular crushing surface.
  • the ridges of the corrugations provide a proper nip angle for crushing at the top of the chamber while the grooves provide a larger area feed opening than could be provided by a noncorrugated surface making a proper nip angle for crushing.
  • the bottom crushing surface which is below the corrugations, provides a smooth annular surface for fine crushing.
  • wear of this bottom crushing surface requires the cone to be raised, to restore predetermined spacing, the size of the feed opening at top is not reduced because wear is deliberately accelerated at the top of the chamber by providing the corrugations which cause the feed material to be nipped only by the ridges of the corrugations which are thereby worn away at a relatively rapid rate.
  • the wearing away of the ridges of the corrugations means that when the cone is raised to compensate for wear at the bottom of the chamber the feed opening is not thereby made smaller than when the ring was new.
  • This invention relates to rock-crushing machines having a conical head and a surrounding shell that defines therebetween and an.-annular crushing chamber, and in particular to such a machine having a replaceable concave ring liner supported by the shell, in which the concave ring is providedwith a special internal configuration which defines an outer wall of the crushing chamber around the conical head.
  • Typical examples of the first type, disclosing corrugations on the'inner surface of a chamber-defining ring,-with.crests and valleys each disposed in a vertical plane include: U.S.- Pat. No. 112,560 of 1871;,U .S. Pat. No.41 1,881 of 1889; U.S. Pat. No.”759,643 'of 1904; U.S. Pat. No. 845,067 and 859,835 of 1907; U.S. Pat. No. 1,083,283 of 1914; U.S. Pat. No. 1,706,944 of 1929; and U.S. Pat. No. 2,934,277 of 1960.
  • Typical examples of the secondtype, disclosing horizontal annular steps on the inner surface of a chamber-defining ring include: U.S. Pat. No. 669,060 of 1901: U.S. Pat. No. 1,366,985 of 1921; U.S. ,Pat.No.'1,574,142 of 19.26 and US. Pat. No. 1,775,750 of 1930.
  • Typical examples of the type combining corrugationsand steps include U.S. Pat. No. 27,246 of .1860; BritishPat. No. 15,954 of 1885; and BritishPat. No- 16,837 of 1897.
  • One of the objects of the present invention is directed to solving the foregoing problem.
  • a crusher is provided with a crushing chamber defined between a vertical conical head and a surrounding replaceable concave ring the inside of which is provided with a stepped surface comprising alternately, annular-crushing surfaces and annular connecting surfaces.
  • the inside of theconcave ring is also provided with vertical corrugations defined by alternate grooves and ridges which begin at the top and material inlet end of the concave ring, and extend downwardly to one of the annular crushing surfaces at a horizontal level above at least the lowermost annular crushing surfaces.
  • the ridges of the corrugations provide a proper nip angle for crushing at the top" of the chamber while the grooves provide a larger area feed opening than could be provided by a noncorrugatedsurface making a proper nip angle for crushing.
  • This larger feed area will also admit to the chamber pieces of a size larger than the size that can be nipped at the entrance to the crushing chamber.
  • the bottom crushing surface, which is below the corrugations provides a smooth annular surface for fine crushing.
  • the size of the feed opening at top is not reduced because wear is deliberately accelerated at the top of the chamber by providing the corrugations which cause the feed material to be nipped only by the ridges of the corrugations which are thereby worn away at a relatively rapid rate.
  • the wearing away of the ridges of the corrugations means that when the cone is raised to compensate for wear at the bottom of the chamber the feed opening is not thereby made smaller than when the ring was new.
  • FIG. 1 of the accompanying drawing shows diagrammatically a side elevation, partly in section, a crusher according to the present invention
  • FIG. 2 is an enlarged view of a fragment of FIG. 1;
  • FIG. 3 is an enlarged fragmentary view taken along line III-Ill in FIG. 2 and viewing the structure in the direction indicated by arrows.
  • FIG. 1 an upper portion of a gyratory crusher is shown comprising a shaft 1 which carries a conical head 2 with a conical mantle 3 mounted thereon and defining a space 4 between mantle 3 and head 2 which may be filled with zinc or resin.
  • the head 2 and mantle 3 are surrounded by an annular shell within which is hung a replaceable conical and concave ring 11 which is supported in a fixed position by bolts 12 that project downwardly through a shell flange 13 and an aligned ring flange 14.
  • the concave ring 11 cooperates with conical mantle 3 on head 2, to define a material feed opening 15 at the top and apex end of the conical concave ring 11, a material-discharging opening 16 at the bottom and base end of the conical concave ring 11, and a material-crushing chamber 17 therebetween.
  • Crushing action is provided by an eccentric l8 rotated (by means not shown) which gyrates the shaft, about a central axis A-B passing through ring 11, as indicated by the broken line A-C.
  • the gap between the mantle 3 and ring 11 may be adjusted by raising or lowering shaft 1.
  • Shaft 1 may be raised and lowered by a piston 19 as disclosed in U.S. Pat. No. 2,448,936.
  • the inner surface of concave ring 11 is provided with a stepped and corrugated configuration that will be described with reference to FIGS. 2 and 3.
  • the stepped configuration on the inside of ring 11 comprises, alternately, an annular crushing surface 20 and an annular connecting surface 21 between each adjacent pair of crushing surfaces 20.
  • the annular crushing surfaces 20 each slope outwardly away from the central axis A-B in a direction from the apex (top and inlet) end 15 toward the base (bottom and outlet) end 16.
  • the annular connecting surfaces 21 each slope inwardly toward the central axis A-B in a direction from the apex-inlet end 15 toward the base-outlet end 16.
  • the corrugated configuration is superimposed upon the stepped configuration and the corrugations are formed by curved surfaces defining alternate ridges 25 and grooves 26.
  • the convex curvature of ridges 25 and concave curvature of grooves 26 each initially represent half of the radial distance between the crest of a ridge and the bottom of groove but operation such as will be described results in the ridges wearing away as indicated by a broken line 25a.
  • the ridges 25 and grooves 26 as shown in FIG. 2 begin at the apexinlet end 15 of chamber 17 and extend downwardly, each in a plane parallel to central axis A-B, to one of the crushing surfaces 20 inwardly and upwardly of the crushing surface 20" adjacent the base-outlet end 16.
  • the crushing surface 20, into which the ridges 25 and grooves 26 merge is a crushing surface closer to the apex-inlet end 15 than to the basecutlet end.
  • Crushing surface 20" presents a considerably greater surface area to face the conical mantle 3, as it is here where the fine crushing occurs.
  • rock of various and irregular sizes may be fed into the material feed inlet 15.
  • the feed inlet 15 will admit a piece of rock of a size represented by the circle 30, which is larger than a piece of rock of a size represented by the circle 31, which can be nipped at the entrance 15 to the crushing chamber 17.
  • the advantage of this feature of the present invention can be considered from two viewpoints. From one viewpoint, as shown in FIG. 3, by providing the grooves 26 the present invention permits pieces 30, which are larger than nipsize pieces 31, to be admitted to the crushing chamber. From a second viewpoint, as shown in FIG.
  • the inner surface of the ring also defining corrugations of alternate ridges and grooves with the entire length of each being disposed in a vertical plane;
  • the grooves and ridges of the corrugations extend downwardly from the top of the ring to and terminate at one of the annular crushing surfaces at a horizontal level above at least the lowermost one of the annular crushing surfaces.
  • means for raising and lowering the conical head within and relative to the surrounding concave ring and operable to raise the conical head after use has resulted in a wearing away of the lowermost of the annular crushing surfaces and the ridges of the corrugations, to thereby restore the predetermined minimum spacing between the conical head and the lowermost crushing surface of the concave ring and maintain the desired feed opening at the top of the concave ring.
  • a crusher according to claim 1 in which the lowermost annular crushing surface of the concave ring presents a greater surface area than the next higher of such plurality of crushing surfaces.
  • a crusher according to claim 1 in which the feed opening at the top of the ring defines an opening of smaller outer diameter than the outer diameter of the crushing chamber defined by the bottom of the ring, and the ridges and grooves of the corrugations extend downwardly and radially outward of the conical head to merge into one of the annular crushing surfaces closer to the feed opening than to the discharge openmg.
  • a crusher according to claim 1 in which the ridges of the corrugations are curved surfaces.
  • a crusher according to claim 5 in which the curved surface defining each ridge of the corrugations is a convex surface which in a horizontal plane extends radially outward at least approximately one-half of the distance to the radially outermost portions of the adjacent grooves.
  • a concave ring having an inner surface defining a conical concave chamber about a central axis passing therethrough and having an apex end thereof of smaller diameter than a base end thereof remote of the apex end, for defining in a cone-type crusher an outer wall of a crushing chamber, and the inner surface of the concave ring having a configuration defining:
  • A. a plurality of annular steplike surfaces comprising alternately an annular crushing surface each sloped outwardly of the central axis in a direction from the apex end toward the base end and an annular connecting surface between crushing surfaces, the connecting surfaces each sloped inwardly toward the central axis in a direction from the apex end toward the base end;
  • the grooves and ridges begin at the apex end of the conical concave chamber and extend therefrom to and terminate at one of the annular crushing surfaces spaced inwardly of the crushing surface adjacent the base end of the conical concave chamber.
  • a ring according to claim 7 in which at least the annular crushing surface adjacent the base end of the conical concave chamber presents a greater surface area than the next inwardly adjacent of such plurality of crushing surfaces.
  • a ring according to claim 7 in which the ridges of the corrugations are curved surfaces.
  • a ring according to claim 9 in which the curved surface defining each ridge of the corrugations is a convex surface which in a plane perpendicular to the central axis extends radially outward of the central axis at least approximately onehalf of the distance to the radially outermost portions of adjacent grooves.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
US827712A 1969-05-26 1969-05-26 Concave ring for cone crushers Expired - Lifetime US3614004A (en)

Applications Claiming Priority (1)

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US82771269A 1969-05-26 1969-05-26

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US3614004A true US3614004A (en) 1971-10-19

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US (1) US3614004A (es)
BE (1) BE750964A (es)
BR (1) BR7019298D0 (es)
DE (1) DE2025802A1 (es)
FR (1) FR2048783A5 (es)
GB (1) GB1239538A (es)
SE (1) SE358309B (es)
ZA (1) ZA703554B (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712551A (en) * 1970-04-01 1973-01-23 Hasokawa Funtaikogaku Kenkyush Device for grinding synthetic resin or like having low melting temperature into powder
US9962708B2 (en) 2013-05-22 2018-05-08 Thyssenkrupp Industrial Solutions Ag Gyratory crusher

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE442172B (sv) * 1982-05-12 1985-12-09 Svedala Arbra Ab Konkross

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20941A (en) * 1858-07-20 erkbon
US1894601A (en) * 1929-02-20 1933-01-17 Nordberg Manufacturing Co Crushing machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20941A (en) * 1858-07-20 erkbon
US1894601A (en) * 1929-02-20 1933-01-17 Nordberg Manufacturing Co Crushing machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712551A (en) * 1970-04-01 1973-01-23 Hasokawa Funtaikogaku Kenkyush Device for grinding synthetic resin or like having low melting temperature into powder
US9962708B2 (en) 2013-05-22 2018-05-08 Thyssenkrupp Industrial Solutions Ag Gyratory crusher

Also Published As

Publication number Publication date
FR2048783A5 (es) 1971-03-19
BR7019298D0 (pt) 1973-05-08
DE2025802A1 (de) 1970-12-17
BE750964A (fr) 1970-11-26
ZA703554B (en) 1972-01-26
SE358309B (es) 1973-07-30
GB1239538A (es) 1971-07-14

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AS Assignment

Owner name: WOODS KATHLEEN D., AS TRUSTEE

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329

Owner name: CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329