US3578251A - Bar-type rotary crushers - Google Patents

Bar-type rotary crushers Download PDF

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Publication number
US3578251A
US3578251A US731848A US3578251DA US3578251A US 3578251 A US3578251 A US 3578251A US 731848 A US731848 A US 731848A US 3578251D A US3578251D A US 3578251DA US 3578251 A US3578251 A US 3578251A
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US
United States
Prior art keywords
flats
crusher
radial
girdles
stringers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US731848A
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English (en)
Inventor
Leonel Beudin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bureau de Recherches Geologiques et Minieres BRGM
Original Assignee
Bureau de Recherches Geologiques et Minieres BRGM
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/04—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with unperforated container

Definitions

  • a crusher of the type in question is provided, on the interior lateral wall of the cylinder, with at least two removable or easily replaceable girdles, forming the runway for the bars and 4 separating these bars from the lateral wall of the cylinder, the
  • the lateral wall of said generally cylindrical structure comprises a screen rolled on a cage formed by stringers parallel to the axis of rotation of said generally cylindrical structure and fixed to terminal walls of said generally cylindrical structure.
  • FIG. 1 shows, in longitudinal section along H of HO. 2, a crusher of the type concerned;
  • FlG. 2 shows, in profile and in section along ll-ll of FIG. 1, the same crusher;
  • FlG. 3 shows, in section, a variant of a detail of FIG. 1;
  • HO. 4 shows, in a view similar to that of H6. 2, a variant of another detail of FIGS. 1 and 2',
  • FlG. 5 shows, in longitudinal section along V-V of FIG. 6,
  • FIG. 6 shows, in profile and in cross section, the same crusher as FIG. 5.
  • the crusher in its overall aspect, it is constructed in any appropriate manner such that it comprises a rotary cylinder (or generally cylindrical structure) adapted to receive the products to be crushed and containing cylindrical (or prismatic) bars 2, the dimensions of the cylinder 1 and of the bars 2, as well as the number and the weight of these bars, being determined according to the nature of the products to be crushed and the output required of the crusher.
  • any suitable device can be used, such'as, for example, that which is described in British Pat. Specification No. 1,025,219 published Apr. 6, 1966 in the name Bureau deInstituts Geiquess et Miriieres. Furthermore, devices are provided for introducing into the cylinder the products to be crushed and for evacuating the crushed products.
  • the cylinder 1 is provided,
  • each of its terminal walls-4 and 40 shown schematically in FlG. l with interior girdles 5 fixed with the lateral wall 3 of the cylinder 1 in amanner by which they can be easily mounted or' dismounted (such as by ple,
  • the distance separatingthe two girdles 5 is lessthan the length of a bar 2, so that these girdles form the runway for the bars 2 and separate these bars from the lateral wall 3 by a distance d (FIG. 1) that is chosen greater than the dimensions of the large particles (and in general of the largest of these particles) of the products to be cmshed introduced into the cylinder 1.
  • the excess of this distance d over the dimensions of the largest particles to be crushed is nonnally chosen equal to the amount of wear of the girdles that takes place in an economicallyfavorable duration of use.
  • Each of the runway girdles is either formed in a single piece (for example, of steel), or formed by two coaxial rings 6 and 7 engaged one in the other, like the girdle 5a of FIG. 3.
  • the exterior ring 6 (which can, for example, be made of steel) has a thickness e equal to the dimension of the large particles in- Advantageously means. are provided adapted to collect the material accumulated at the bottom of the cylinder 1 and to lift this material during the rotation of the cylinder in order next to dump it on and between the bars 2 thus permitting this material to be crushed again.
  • these means are formed by pockets 8 (FlGS. l and 2), formed in the lateral wall 3 and disposed either in quincunx, as shown in FlG. l where there is shown a part of the lateral wall 3 provided with its pockets, or along the entire length of the cylinder.
  • these means are formed by ribs disposed on the'lateral wall 3 in a direction at 1 the cylinder 1, or pass through the-wall of the cylinder [and open at the exterior through a screened window, according to a variant not shown.
  • the pockets have a double function: 1
  • a maximum value can be given to the surface of the screened windows by forming the lateral wall of the generally cylindrical structure 1 by a screen 11, according to the embodiment shown in H05. 5 and 6.
  • the screen 11 is curved and applied externally on stringers l2 and flats 13 disposed along the generatrices of a cylindrical surface and formed, for examby elements interconnecting the terminal walls 4 and 4a of structure.
  • a frame is obtained in the form of a squirrel cage on which the screen 11 is fixed.
  • the stringers or principal elements 12 are disposed so that their width develops normal to the radial directions.
  • the flats or auxiliary elements 13, which are not so wide as the principal elements 12, are disposed so that their width is oriented in a direction forming an acute angle A angle A is detennined, according to the dimensions and the speed of rotation of the crusher, so that the flats 13, for a suitable sense of rotation of the crusher, scrape and lift the products accumulated at the bottom of the cylindrical structure, and then make them fall into the interior of the sector occupied by the crushing bars 2, and not beyond this sector.
  • the flats 13 can have a radial height greater than the radial thickness of the stringers 12.
  • the principal elements 12 also contribute to the scraping and to the lifting of the products accumulated at the bottom of the cylindrical structure.
  • the ele ments 12 and 13 are regularly distributed around a circumference whose center is located on the axis of rotation of the cylindrical structure 1 and are used, preferably, in equal numbers, for example eight of each type.
  • the dismantable girdles 5, on which the bars 2 roll, are fixed (for example by screws) on the stringers 12.
  • the present invention provides a crusher which remedies the disadvantages mentioned hereabove of the conventional bar-type crushers having expendable plates which carry out a part of the crushing between each bar and the cylinder, without the reduction of output which a man skilled in the art might normally expect in view of the elimination of this part of the crushing.
  • the elimination of the expendable plates permits the dimensions of the cylindrical structure of the crusher to be obtained which surpasses the reduction mentioned above.
  • the output is also increased by the elimination of the sufficiently crushed products, which leads to the decrease or the elimination of overcrushing, by means of the cylindrical structure whose lateral wall is formed by a screen.
  • the extreme facility of construction of such a structure, shown in FIGS. and 6, should be mentioned, as well as its lightness,
  • crushers according to the present invention are cheaper and with the radial direction. This acute below said girdles and then to dump the lifted have a greater longevity.
  • a crusher comprising a generally cylindrical structure arranged to be rotated about its axis disposed in a substantially horizontal position, said structure comprising a plurality of stringers distributed evenly around, at the same radial distance from and parallel to said axis and fixed to terminal walls of said structure to form a cage, at least two girdles being fixed to the radially inner surfaces of said stringers to form circular runways, a plurality of crusher bars loosely supported on the inside of said runways, and a screen curved and applied around said cage.
  • a crusher according to claim 1, wherein said generally cylindrical structure comprises, an interior lateral wall, and flats thereon adapted to collect and lift particles accumulated particles on the bars during rotation of said generally cylindrical structure.
  • a 'crusher according to claim 3 wherein said flats are arranged so that their width is oriented in adirection forming an acute angle with the radial direction.
  • a crusher according to claim 3 wherein said flats have a radial heightgreater than the radial thickness of the stringers. 6. A crusher according to claim 3, wherein said flats are arranged so that their width is oriented in a direction forming an acute angle with the radial direction, and wherein they have a radial height greater than the radial thickness of the stringers.
  • a crusher according to claim 2 wherein said structure comprises an interior lateral wall and flats thereon adapted to collect and lift particles accumulated below said girdles and then to dump the lifted particles on the bars during rotation of the cylindrical structure, said flats being of a radial height greater than the radial thickness of the stringers and arranged so that their width is oriented in a-direction forming an acute angle with the radial direction.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
US731848A 1967-05-26 1968-05-24 Bar-type rotary crushers Expired - Lifetime US3578251A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR108129A FR1532482A (fr) 1967-05-26 1967-05-26 Perfectionnements apportés aux broyeurs rotatifs à barres

Publications (1)

Publication Number Publication Date
US3578251A true US3578251A (en) 1971-05-11

Family

ID=8631767

Family Applications (1)

Application Number Title Priority Date Filing Date
US731848A Expired - Lifetime US3578251A (en) 1967-05-26 1968-05-24 Bar-type rotary crushers

Country Status (5)

Country Link
US (1) US3578251A (en:Method)
BE (1) BE715450A (en:Method)
DE (1) DE1757618B2 (en:Method)
FR (1) FR1532482A (en:Method)
GB (1) GB1218218A (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2335393C1 (ru) * 2007-02-15 2008-10-10 Игорь Феликсович Шлегель Устройство подготовки пресс-порошка

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2455916C3 (de) * 1974-11-26 1982-11-11 Gämmerler, Hagen, 8021 Icking Schwingmühle, zum Zerkleinern von stückigem Gut, insbesondere von Gestein
EP0760258A1 (de) * 1995-09-02 1997-03-05 Thyssen Industrie Ag Verfahren zur Aufbereitung einer bei Betrieb einer Hammerbrecher- bzw. Shredderanlage anfallenden, inhomogenen Gutfraktion

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1242423A (en) * 1916-10-28 1917-10-09 John W Cover Grinding-mill.
US3022017A (en) * 1956-12-14 1962-02-20 Kennametal Inc Method of and apparatus for comminuting hard materials

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1242423A (en) * 1916-10-28 1917-10-09 John W Cover Grinding-mill.
US3022017A (en) * 1956-12-14 1962-02-20 Kennametal Inc Method of and apparatus for comminuting hard materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2335393C1 (ru) * 2007-02-15 2008-10-10 Игорь Феликсович Шлегель Устройство подготовки пресс-порошка

Also Published As

Publication number Publication date
GB1218218A (en) 1971-01-06
FR1532482A (fr) 1968-07-12
DE1757618A1 (de) 1972-06-08
DE1757618C3 (en:Method) 1975-08-21
BE715450A (en:Method) 1968-11-20
DE1757618B2 (de) 1975-01-09

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