RU2028184C1 - Centrifugal crusher - Google Patents

Abstract

FIELD: heat and power engineering, coal grinding. SUBSTANCE: crusher has housing 1 with rotor mounted on vertical shaft 2. Disposed in the rotor are booster disks 3 with blades 4 together with grinding members 5. Ring-shaped separating grid 9 and shell 12 are disposed in a concentric relation to the rotor so as to be joined to shell 12 through flexible members 11. Grid 9 has extra shell 10 mounted in a spaced relation inside main shell 12. EFFECT: more efficient coal crushing. 1 dwg

Description

 The invention relates to a power system, to grinding technology, namely to the design of centrifugal crushers designed for grinding solid fuel.

 Known centrifugal crusher containing a housing with loading and unloading necks, stationary crushing elements mounted on the housing, a rotor with a vertical axis of rotation in the form of an accelerating disk.

 The disadvantage of the designs is the appearance of significant material losses due to the insufficient efficiency of separation of the finished product from non-crushed items.

 The technical result consists in the fact that in a centrifugal crusher screening efficiency is increased, material losses during crushing are reduced.

 This is achieved by the fact that a centrifugal crusher containing a housing with loading and unloading necks, stationary crushing elements mounted on the housing, a rotor with a vertical axis of rotation in the form of an accelerating disk, is equipped with a ring screen, mounted concentrically to the rotor, and a shell, which are connected using elastic elements moreover, in the lower part of the lattice an additional shell is mounted, located with a gap inside the main shell.

 The drawing shows a crusher, section.

 The crusher includes a housing 1, in which a rotor is mounted on a vertical shaft 2, consisting of an accelerating disk 3 with blades 4 and rotary crushing elements 5, mounted in the disk 3 with fingers 6. At the lower end of the shaft 2, a driven belt pulley 7 is installed. In the housing 1 mounted stationary crushing elements 8, for example, in the form of a ring with radially oriented protrusions.

 A rotary grill 9 is mounted concentrically to the rotor, and a conical shell 10 is adjacent to it. 10 are determined by design considerations due to the ease of installation of the elastic elements 16. The housing 1 and the annular shell 12 form a cavity 13 for passing crushed material and a cavity 14 for removing catch grating 9 unfinished items. The crusher is closed by a lid 15 with a loading neck 16.

 Crusher works as follows.

 The source material through the loading neck 16 enters the Central part of the rotating disk 3 of the rotor and due to the action of centrifugal forces moves to the periphery of the disk. In this case, codiolis forces of inertia determine the movement of the material along the accelerating blades 4, including the rotary parts. Crushing occurs between the protrusions of the elements 8 and the leading edges of the rotary elements 5. The front edges of the elements 5 crushed pieces are discarded to the screening grid 9. Pieces smaller than the width of the slots fall into the cavity 13 and fall down. Larger pieces are finished on the screening grid 9 by impacts of elements 5 and also fall into the finished product. Imperishable objects, such as metal inclusions, are trapped by the screening lattice 9 and fall down through the cavity 14. Due to the inevitable uneven distribution of the source material around the circumference of the rotor disk 3, due to the wide variation in the sizes of pieces of material and the presence of non-fragmentable inclusions in it, it moves along each accelerating blade 4 different in mass amount of material. This material after crushing falls along the annular screening lattice 9 to the cracks. Due to the fact that at each point in the circumference of the annular screening lattice 9, a different amount of material is affected by the mass, the lattice 9 makes random oscillatory movements (vibration) relative to the housing 1 on the elastic elements 11, which increases the screening efficiency and reduces the loss of the finished material. In addition, the vibrations of the annular screening lattice 9 reduce the sticking of material on it when working with wet materials.

Claims (1)

 A CENTRIFUGAL CRUSHER, comprising a housing with loading and unloading necks, fixed crushing elements mounted on the housing, a rotor with a vertical axis of rotation in the form of an accelerating disk, characterized in that the crusher is equipped with a ring screen, mounted concentrically to the rotor, and a shell connected by elastic elements, and in the lower part of the lattice mounted an additional shell located with a gap inside the main shell.