Solid material comminution or disintegration – Apparatus – Rotary striking member with moving cooperating surface or...
Patent
1985-07-11
1987-04-21
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Rotary striking member with moving cooperating surface or...
241188R, B02C 1320
Patent
active
046590250
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
The invention relates to the comminution of materials, and more particularly, to a disintegrator.
STATE OF THE ART
Known in the art is a grinding apparatus (cf. USSR Inventor's Certificate No. 202610), comprising a rotor in the form of a disc provided with milling bodies in the form of pins.
A substantial part of air and fines in the milling apparatus of this type flows around the end face portion of pins so that efficiency of comminution is low.
In addition, if large-size foreign bodies get into the milling apparatus by accident, jamming of the pins occurs to result in damage to the drive shafts and deformation of the rotor disc.
Known in the art is a disintegrator (cf. U.S. Pat. No. 3,894,695), comprising rotors in the form of discs having working wheels secured thereto. Each wheel consists of a pair of rings between which there are provided milling bodies in the form of plates.
In operation, the material is treated by the milling bodies through collisions. Air flow moves together with the material. The air rotates together with the working wheel while at the same time moving radially outwards. A boundary air layer moves on either side of the rings under the action of centrifugal forces together with particles of material causing wear of the plates. As a result, the radial plates wear more rapidly than the milling bodies thus increasing the probability of failure.
Known in the art is a disintegrator (cf. USSR Inventor's Certificate No. 541497), comprising a milling chamber accommodating drive shafts and two rotors mounted thereon which rotate in opposite directions relative to each other. The first rotor comprises a carrier disc mounted on the drive shaft supporting concentrically disposed wheels for disintegrating the material. The second rotor comprises a transfer disc mounted on the drive shaft in parallel with the carrier disc of the first rotor. A distribution wheel is provided on the periphery of the transfer disc, and a carrier disc is mounted on the distribution wheel in parallel with the carrier disc of the first rotor. Wheels for disintegrating the material are concentrically mounted on the carrier disc, each wheel being disposed between two adjacent disintegrating wheels of the first rotor. Each disintegrating wheel of both rotors comprises a cylindrical wheel with openings, a milling body being provided behind each opening on one side thereof. The milling body comprises a circularly bent plate having its concave surface facing toward the opening and opposite to the direction of rotation of a respective carrier disc.
The disintegrator has pipes for charging a material to be treated and for discharging the comminuted material.
The material being treated is fed through the charging pipe and passes through the rotors where it collides with the milling bodies. Air flow moves together with the material. The air flow is split by the milling bodies and a part of the air moves together with the material laterally over the outer edge of the cylindrical shell. This part of the material causes undesired wear of the opposite carrier disc while the material is comminuted less efficiently on the next disintegrating wheel. If large-size foreign bodies get into the apparatus by accident, the speed of the disintegrating wheels and rotors materially decreases thus causing deformation of the carrier discs and drive shafts.
SUMMARY OF THE INVENTION
The invention is based on the problem of providing a disintegrator which has rotors so constructed as to improve efficiency of grinding of a material and also to avoid the possibility of damage to the drive and carrier discs by accident.
This problem is solved by that in a disintegrator comprising pipes for charging a material to be disintegrated and discharging the comminuted material, a milling chamber accommodating a pair of rotors mounted on drive shafts for rotation in opposite directions relative to each other, the first rotor comprising a carrier disc mounted on the drive shaft and disintegrating wheels concentrically mounted thereon and
REFERENCES:
patent: 3028105 (1962-04-01), Perrine
patent: 3894695 (1975-07-01), Benedikter
Tamm Yaan V.
Tjumanok Alexei N.
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