RU28991U1 - TWO CURRENT CRUSHER - Google Patents

Description

Twin rotor crusher

Useful modf1b relates to devices for grinding solid bulk products.

Known centrifugal chopper RF patent No. 2065328 C. 02 C 13/20, 1996, containing a cylindrical body with an annular deck, loading and unloading nozzles, two coaxial rotors with hammers, placed one in the other and installed in the body with the possibility of counter rotation relative to the axis. When operating such a crusher

High rotational speed is required to ensure fine grinding. Despite this, part of the grains leaves the working area intact. The particle size distribution of the obtained product has a low coefficient of uniformity. 1

Known centrifugal chopper RF patent No. 2156660 C. In 02 С 13/20, 2000, containing a cylindrical body with an annular deck, loading and unloading nozzles, two coaxial rotors with hammers. The rotors are placed one in another and installed in a housing with

the possibility of counter rotation around the axis. Pa external rotor

relative to the hammers of the inner rotor are installed at an angle to

the radius of the rotors are straight blades, with the concave side facing the movement of the rotor. During the operation of such a crusher, non-burnt particles reflected from a blade located on the outer rotor hit the hammers of the inner rotor not at a right angle, which provides the best conditions for destruction. Therefore, in the finished product there are large and sometimes undestroyed particles. The granulometric composition of the obtained product has an insufficiently high coefficient of evenness.

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MKI in 02 with 13/20

The technical result is to increase the degree of grinding, increase the coefficient of uniformity of the particle size distribution of the finished product, reduce the specific energy consumption of the grinding process.

The problem, to which the utility model is directed, is achieved by the fact that in a two-rotor crusher containing a cylindrical body with an annular deck, for 1 |) narrow and discharge nozzles, two coaxial rotors with hammers, placed one in the other and installed in the housing with the possibility of counter rotation relative to the axis, the blades located on the outer rotor are made with a constant radius of curvature and are installed with the concave side to meet the movement of the inner rotor, and the hammers mounted on the inner rotor are located at an angle to the radius of the rotor, so that deflected against the movement of the inner rotor.

In FIG. 1 shows a longitudinal section through a twin rotor crusher. In FIG. 2 shows the location of the working bodies on the rotors, in cross section.

The two-rotor crusher contains a stationary body 1, loading 2 and unloading 3 nozzles. Internal 4 and external 5 rotors, placed one in another and installed in the housing with the possibility of oncoming rotation; The rotors consist of disks 6, 7, 8 and 9, connected by fingers 10 and P. On the fingers 10 are fixed hammers 12 located at an angle 1; 1 to the radius of the rotor, so that they are deflected against the movement of the internal rotor. On fingers II, packages of hammers 13 are pivotally fixed with a gap with deck 14. On the outer rotor $ are located relative to the hammers 12 of the inner rotor 4, under the corner to the radius towards the movement of the inner rotor 4, the blades 15 with a constant radius of curvature. The blades 15 are installed with the concave side facing the movement of the internal rotor 4. The rotors 4 and 5 are driven through V-belt drives from electric motors 16 and 17.

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The bulk product through the loading pipe 2 enters the lower disk 7 of the inner rotor 4, where it is captured by hammers 12. Hammers 12

accelerate and throw the product on the blades 15. Due to the location of the blades 15 at an angle to the radius of the rotor. 5, as well as its curvature, allows you to create conditions under which particles, not destroyed on the blade 15, due to the elastic properties are thrown on the hammers 12, and thus zaperchivalis in the zone of impact until complete destruction. And the particles obtained as a result of the discharge are removed from this grinding zone due to centrifugal inertia forces and air flow. With further movement of the product falls on the hammers 14, which accelerate it and discard on deck 14, where there is an additional destruction of large particles. The crushed product from the machine is discharged through the loading pipe 3.

Thus, as a result of multi-stage grinding of the product with the creation of a self-separation zone, the degree of grinding increases, the coefficient of uniformity of the granulometric composition of the finished product increases, and the specific energy consumption decreases. This is achieved by the fact that it is more profitable to destroy particles by creating and developing cracks in it due to multiple shock loads in the self-separation zone. The additional destruction of the product by the hammers of the external rotor on the deck ensures the absence of whole grains and large particles in the crushed product.

Applicant: Vice Rector for Scientific Slave (

Claims (2)

1. A two-rotor crusher containing a cylindrical body with an annular deck, loading and unloading nozzles, two coaxial rotors with hammers, placed one in the other and installed in the housing with the possibility of counter rotation relative to the axis, with straight blades mounted on the external rotor, characterized in that the blades mounted on the outer rotor are made with a constant radius of curvature and are installed with the concave side facing the movement of the inner rotor. 2. The two-rotor crusher according to claim 1, characterized in that the hammers mounted on the inner rotor are located at an angle to the radius of the rotor, so that they are deflected against the movement of the inner rotor.