SU1761269A1 - Centrifugal crusher - Google Patents

Abstract

The invention relates to the construction of a centrifugal crusher and can be used in the field of power engineering, in coal grinding technology. The purpose of the invention is to improve working conditions and increase fire and explosion safety by reducing dusting. The material supplied to the rotor 3 is picked up by the accelerating blades 6. The main material destruction occurs between the adjacent edges of the movable crushing elements 8 of the rotor and the fixed crushing elements 9. The crushed material is thrown to the fender 12 and falls down. The shell 12 is fixed on the intermediate ring 10 mounted on the housing 1. On the intermediate ring 10 there are also fixed crushing elements 9 and a guide shell 13, which together with the shell 12 and the housing 1 with the cover 15 forms annular channels communicated with each other through the holes 11 in the intermediate ring 10. These channels cause the overflow of air masses and equalization of the pressure drop inside the housing, which reduces the dust emissions from the crusher and also reduces the dust emissions from the crusher. 1 il. Yo

Description

The invention relates to a power system, to a grinding technique, namely, to designs of centrifugal crushers designed to grind solid fuels.

The aim of the invention is to improve working conditions and increase fire and explosion safety by reducing dusting.

The drawing shows a crusher in the section.

The crusher consists of a housing 1, in which a rotor 3 is mounted on the shaft 2, driven into rotation by means of a V-belt transmission 4. The rotor 3 includes a disk 5 with accelerating elements (blades) 6 mounted on the upper

disk plane. The low periphery of the disk 5, by means of the fingers 7, fixes movable crushing elements 8. Fixed crushing elements, for example, in the form of a crown 9 with radial protrusions, are fixed on an intermediate ring 10, in which a number of holes 11 uniformly distributed around the circumference are made.

The shell 12 is fastened to the ring 10 below, and the shell 13. is fixed from above. The fixed crushing elements and the figured shell are fixed to the ring 10 by bolts 14. A cover 15 with a filling neck 16 is fixed to the ring 10.

The shells 12 and 13 are located at a distance from the housing 1 and the cover 15, forming

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annular channels 17 and 18, respectively, communicating with each other through the openings 11 of the intermediate ring 10. The shells 12 and 13 are protected by wear-resistant linings 19 and 20

 The position of the intermediate ring 10 relative to the housing 1 and, therefore, the distance from the rotor 3 to the fixed crusher elements 9, which determines the size of the crushed product, is adjusted by means of bolts 21.

The rotor 3 is provided with an axial distribution cone 22.

Crusher works as follows.

The rotor 3 is driven to rotate. The crushable material is fed through the neck 16, is evenly distributed around the circumference by a cone 22, picked up by the accelerating vanes 6 and, due to the action of centrifugal forces, moves to the periphery of the disk 5. The working (front) edges of the elements 8 are a continuation of the accelerating blades b. The main destruction of the material occurs between the adjacent edges of the movable elements 8 and the stationary elements 9. The crushed material is thrown to the side wall 12, protected from wear by the lining 19, and falls down,

The rotor 3 during rotation causes an intense radial movement of air captured by the accelerating vanes, the elements 8, as well as crushable material moving along the rotor disk 5. In front of the fixed crushing elements 9 and the shells 12 and 13 (mainly in front of the baffle shell 12), an increased pressure is created, and in the supply area of the crushed material, the central part of the rotor has a reduced pressure area. The presence of communicating channels 17, 18 (in the direction of movement) causes the flow of air masses and the equalization of the pressure differential to some extent, which reduces dust emissions from the crusher, and also reduces the energy costs of rotor rotation. The latter can be compared with the fan operation at smaller heads.

The closed arrangement of the shells, illustrated by the figure, ensures an organized air circulation (shown in FIG. 1, arrows) to prevent pieces of non-crushed material from entering the ventilation ducts and to separate most of the small particles in the discharge zone. The latter is promoted by a change in the direction of air movement at the inlet of the annular channel 17,

The movement of air towards the axis above and

under the rotor outside the channels imee-. secondary importance.

Thus, the crusher crusher's implementation ensures the fulfillment of the purpose of the invention — improving the working conditions for

by reducing dust emissions from the crusher. The simultaneous design provides an increase in the efficiency of the crusher by reducing the energy costs of the rotor drive. In addition, when

This achieves a reduction in noise during the operation of the crusher, which, as is known, is mainly caused by the impact of pieces of material from the crusher's construction, first of all, to the crushing elements attached to the body. Removing these elements from the chassis will reduce noise.

Claims (1)

Invention Formula Centrifugal crusher containing a housing with a lid having a feeding neck and a rotor mounted inside it in the form of a disk with a vertical axis of rotation with accelerating and crushing elements, relative to which fixed crushing elements are concentrically located, characterized in that, with whole improvements in working conditions and increased explosion and explosion safety by reducing dust, it is equipped with a mounted ng housing with the possibility of axial movement of the intermediate ring with rigidx attached to it underneath by a concentric rotor fender guard and csepxv a ring shell that forms with a casing and its lid ring rings connected through holes made in the intermediate ring, the fixed crushing elements being mounted on the ring between the baffle and guide / shells. /AT 2