US975807A - Grinding-mill. - Google Patents

Grinding-mill. Download PDF

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Publication number
US975807A
US975807A US52486409A US1909524864A US975807A US 975807 A US975807 A US 975807A US 52486409 A US52486409 A US 52486409A US 1909524864 A US1909524864 A US 1909524864A US 975807 A US975807 A US 975807A
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Prior art keywords
grinding
cylinder
disks
chute
rotary
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Expired - Lifetime
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US52486409A
Inventor
Karl Otto Samuel Thors
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A Karlson Metall & Maskin AB
Karlson Metall & Maskin A AB
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Karlson Metall & Maskin A AB
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Priority to US52486409A priority Critical patent/US975807A/en
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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
    • B02C7/00—Crushing or disintegrating by disc mills
    • B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
    • B02C7/06—Crushing or disintegrating by disc mills with coaxial discs with horizontal axis

Definitions

  • KARL OTTO SAMUEL THORS .OF STOCKHOLM, SWEDEN, ASSIGNOR TO A.
  • KARLSON METALL & MASKIN .AKTIETBOLAG, OF STOCKHOLM, SWEDEN.
  • the object of my present invention is a feeding device for rotary apparatus such as centrifugal machines, bolters, crushing and pulverizing machines and the like with inclined or horizontal shaft, in which solid substances are treated.
  • the improvement relates to a stationary chute arranged in the feed-opening by means of which the substance conducted into the machine is equally distributed in the rotary cylinder so that stagnation is prevented.
  • the grinding machine consists of two series of grinding disks 0 and d respectively, which are arranged in pairs and movable with relation to each other.
  • the two disks 0 and cl in each pair converge outwardly against each other and are provided with teeth, thus grinding or pulverizing the material passing outwardly between themselves.
  • the disks are secured to a rotary central cylinder 6, into which the material is fed and which is provided with openings e at its periphery, leading the material between the grinding disks 0 (Z.
  • the cylinder 6 is rotated by means of the shaft f, and provided with screws 9.
  • the disks d are bound together by means of screw -bolts 7L and sleeves j and secured to a rotary shaft is surrounding and rotated in opposite directions to the shaft 7.
  • the disks (Z do not extend to the periphery of the cylinder 6, but spaces are left between said disks d and the cylinder for the insertion of packing rings Z.
  • a stationary chute a consists of an annular outer part which is fixed in the inlet opening 0 of the casing 37 and of an integral inner part p which projects into the interior of cylinder 5 and is of a tapering scoop form nearly as broad in its largest part as the said interior.
  • the bottom of the inner part of this scoop lies along the bottom line of said cylinder.
  • the inclination of the side edges of said inner part of the chute approximates the natural inclination of the grain or other material fed in through said chute but is slightly less than the maximum height of the latter.
  • the material fed into the chute a flows over its edges and is thus distributed over the whole interior surface of the rotary cylinder 6, even if the rotary cylinder is of considerable length.
  • the quantity of material falling down on the cylinder 5 is the same along the whole cylinder.
  • rotary grinding mechanism within said casing comprising a rotary cylinder having an open end and openings in its periphery and provided with grinding disks, and a horizontal chute fixed in said inlet opening in a fixed cylinder and extending into the end opening into said rotary cylinder and having an inwardly extending tapering scoop-form portion arranged parallel to andslightly above the bottom of the interior name to this specification in the presence of of said cylinder, the inclinatioi offit?l edges i two subscribing witnesses. at roximatin that of the b0 0' t e matcii ial which e nters through said chute but KARL OTTO SAMUEL THORS' 5 low enough to permit this material to spill witnesseses:

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)

Description

K. O. S. THURS.
\ GRINDING MILL. AJPPLIOATION FILED OCT. 27, 1909.
975,807. Patented Nov. 15, 1910.
THE NORRIS PETERS co., WASHINGTON, u. c,
KARL OTTO SAMUEL THORS, .OF STOCKHOLM, SWEDEN, ASSIGNOR TO A. KARLSON METALL & MASKIN .AKTIETBOLAG, OF STOCKHOLM, SWEDEN.
GRINDING-MILL.
Specification of Letters Patent.
Patented Nov. 15, 1910.
Application filed October 27, 1909. Serial No. 524,864.
To all whom it may concern:
Be it known that I, KARL OTTO SAMUEL THORS, engineer, citizen of Sweden, residing at Stockholm, Vasagatan 7, Sweden, have invented certain new and useful Improvements in Gi-inclingMills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.
The object of my present invention is a feeding device for rotary apparatus such as centrifugal machines, bolters, crushing and pulverizing machines and the like with inclined or horizontal shaft, in which solid substances are treated.
The improvement relates to a stationary chute arranged in the feed-opening by means of which the substance conducted into the machine is equally distributed in the rotary cylinder so that stagnation is prevented.
In feed-devices for rapidly rotating inclined or horizontal grinding machines hitherto known a stagnation of the material is easily caused, as the latter, if not fed in quite evenly, will form a rotary-body in the rotary-cylinder, even if the latter is provided with pretty large openings for admitting the material between the grinding-disks. In this way the new material, which is fed into the machine, is prevented from passing between the disks. In order to prevent this stagnation and to equally distribute the material a nonrotating chute is arranged in the opening of the apparatus, said chute being constructed in such a way that the material is equally distributed in the machine.
In the annexed drawing a longitudinal section of the device is shown applied to a grinding-machine.
According to the embodiment shown on the drawing the grinding machine consists of two series of grinding disks 0 and d respectively, which are arranged in pairs and movable with relation to each other. The two disks 0 and cl in each pair converge outwardly against each other and are provided with teeth, thus grinding or pulverizing the material passing outwardly between themselves. The disks are secured to a rotary central cylinder 6, into which the material is fed and which is provided with openings e at its periphery, leading the material between the grinding disks 0 (Z. The cylinder 6 is rotated by means of the shaft f, and provided with screws 9. The disks d are bound together by means of screw -bolts 7L and sleeves j and secured to a rotary shaft is surrounding and rotated in opposite directions to the shaft 7. The disks (Z do not extend to the periphery of the cylinder 6, but spaces are left between said disks d and the cylinder for the insertion of packing rings Z.
A stationary chute a consists of an annular outer part which is fixed in the inlet opening 0 of the casing 37 and of an integral inner part p which projects into the interior of cylinder 5 and is of a tapering scoop form nearly as broad in its largest part as the said interior. The bottom of the inner part of this scoop lies along the bottom line of said cylinder. The inclination of the side edges of said inner part of the chute approximates the natural inclination of the grain or other material fed in through said chute but is slightly less than the maximum height of the latter. The material fed into the chute a flows over its edges and is thus distributed over the whole interior surface of the rotary cylinder 6, even if the rotary cylinder is of considerable length. In View of the edges of the chute sloping against the side wall of the cylinder as indicated the quantity of material falling down on the cylinder 5 is the same along the whole cylinder.
Claim:
In combination with a fixed cylinder provided with an inlet opening in its side and grinding mechanism secured to an inner wall thereof, rotary grinding mechanism within said casing comprising a rotary cylinder having an open end and openings in its periphery and provided with grinding disks, and a horizontal chute fixed in said inlet opening in a fixed cylinder and extending into the end opening into said rotary cylinder and having an inwardly extending tapering scoop-form portion arranged parallel to andslightly above the bottom of the interior name to this specification in the presence of of said cylinder, the inclinatioi offit?l edges i two subscribing witnesses. at roximatin that of the b0 0' t e matcii ial which e nters through said chute but KARL OTTO SAMUEL THORS' 5 low enough to permit this material to spill Witnesses:
over said sides substantially as set forth. ANNA S6DERSTR6M,
In testimony whereof, I have signed my HARRY ALBIHN.
US52486409A 1909-10-27 1909-10-27 Grinding-mill. Expired - Lifetime US975807A (en)

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US52486409A US975807A (en) 1909-10-27 1909-10-27 Grinding-mill.

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