SU1431835A1 - Planetary mill - Google Patents

Abstract

The invention relates to the processing of various materials, namely, planetary mills for fine grinding and activation of materials, and provides a reduction in energy intensity and increase reliability. The mill contains drove 1 with a vertical shaft 2. On stand 1 are installed in bearings 3 grinding drums 4 with working bodies. On the outer wall of the grinding drums 4, the float chamber 5 is placed coaxially positioned relative to the grinding drum 4, the float chamber 5 immersed in the fluid in the cavity of the carrier 1. The carrier 1 contains radial guides 6, in which the bearings of the three grinding drums 4 are movably mounted. a pipe 7 for supplying a coolant to the cavity of the carrier 1 and outlet pipes 8 for discharging it. The movable sealing membranes 9 are mounted on the shaft of the grinding drums 4 and mounted on the carrier 1. The radial partitions with openings are mounted on the carrier. The floor of the float chamber 5 can be filled to increase the strength with a light filling substance, such as foam plastic. 1 hp f-ly, 3 ill. F

Description

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The invention relates to the processing of various materials, namely to planetary mills, and can be used for the fine grinding and activation of materials in the mining, chemical, metallurgical and other sectors of the industry.

The purpose of the invention is to reduce energy intensity and increase the reliability of the work of the planetary mill.

FIG. 1 schematically shows a planetary mill; a general view, a longitudinal section; in fig. 2 is the same top view5 in FIG. 3 is the same as the embodiment.

The planetary mill contains a carrier 1 with a vertical shaft 2. On the carrier 1, there are 3 grinding drums A with working bodies installed in bearings. On the outer wall of the grinding

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the drums 4 are fixed with a float chamber 5 coaxially arranged with it, immersed in the fluid in the carrier cavity 1. The carrier 1 contains radial directions no longer 6, in which bearings 3 of the grinding drums 4 are movably mounted. The planetary mill contains an inlet 7 for feeding coolant in the cavity drove 1 and the outlet 8 for its drain. The outlet nozzles 8 are located at the same distance from the axis of rotation of the carrier 1. The movable seal of the membrane 9 is mounted on the shaft of the grinding drums 4 and fixed on the carrier 1. On the carrier 1 there are radial partitions 10 with an opening 1 Ф1 11. Each grinding drum 4 is fixed in a separate cavity 12, and the cavity 12 are interconnected bypass 13.

In order to increase strength, the float chamber 5 may be filled with a light filling substance, for example, foam plastic.

The upper hollow nozzle 14 of the grinding drum A serves to load the material to be ground, and the lower hollow nozzle 15 is used to unload the crushed material.

Planetary mill works as follows.

A drive (not shown) drives the carrier 1 to rotate, and at the same time a cooling fluid is fed through the inlet 7 to the carrier 1. Under the action of the floor center ™ of the runner's forces, the grinding drums 4 trans

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they move along the radial guides 6 and occupy a position as far as possible from the axis of rotation of the carrier 1.) & 1dkost at the same time acquires a ring-shaped form, located in the cavity of the carrier 1 at its peripheral regions. When the liquid level reaches the outlet nozzles 8, its excess flows through them, i.e. In the cavity of the carrier 1, a certain working fluid level is established. The location of the outlet nozzles 8, the dimensions of the float chambers 5, the grinding drums 4 and their weight, together with the load (the material to be ground and the balls), are chosen so that the grinding drum 4 under the action of the buoyancy force floats toward the center and is set in the working position. In this way, the bearings of the 3 grinding drums 4 are unloaded, since the weight of the grinding drum 4, increased tenfold by centrifugal forces, is fully compensated by the buoyancy force of the liquid. Radial baffles 10 with apertures 11 contribute to the rapid installation of fluid into the stationary mode. After the swelling of the molar drums 4, the latter are rotated by a drive, allowing the distance from the center of the axis of rotation of the carrier 1 to vary to the axis of the grinding drum 4, for example, hydraulically. After the working frequency of rotation of the carrier 1 and the grinding drums 4 has been reached, the upper hollow pipe 14 of the grinding drum 4 is fed to the grinding pulp or dry material. The finished product is discharged through the lower hollow nozzle 15 of the grinding drum 4.

The balances that may arise due to uneven feeding or uneven wear are automatically compensated by moving the grinding drum 4 along the radial guides 6 of the carrier 1 and displacing the float chamber 5 of the liquid, while the weight of the additionally displaced fluid will be equal to the weight of the grinding drum 4. Thus, the carrier 1 is balanced and its bearings 3 do not experience shock loads, which increases their service life.

The flow of fluid from the inlet nozzle 7 and its drain through the outlet nozzles 8 provides cooling of the grinding drum-4 and its swimming. In a number of cases, if there is no need for heat removal, for example, when grinding with pulp, after reaching the operating mode, the flow of liquid through the inlet 7 can be stopped. At the same time, remaining with in the cavity drove 1 liquid will ensure the efficiency of the mill. The movable sealing membranes 9, mounted on the shaft of the grinding drums 4 and yKpe prisoners on the carrier 1, prevent the liquid from flowing out of the carrier cavity 1, protect the bearings 3 and at the same time allow the grinding drum 4 to move in the radial direction.

The unloading of bearings 3 in a planetary mill allows an increase in the rotational speeds of the grinding drums 4 and carrier 1, i.e. intensify the grinding process without reducing the life of the mill. Thus, the planetary mill opens up new possibilities for carrying out the processes of activation of various substances with higher energy intensity and efficiency.

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The use of the proposed mill in the grinding (activation) of a wide class of substances reduces the energy consumption for obtaining the final product and increases its service life.

Claims (2)

1. A planetary mill containing a carrier made in the form of a cylindrical body with tertsezim disks and nozzles for inlet and outlet of liquid, and located in the body of the carrier and mounted in the bearings grinding drums with working bodies, in order to reduce energy intensity and increasing the reliability of operation, the grinding drum is made with a float-shaped annular chamber fixed on its outer surface, and radial guides are mounted on the face discs, in which bearings are mounted ki grinding drums. 2. Mill according to claim 1, about tl and h. With the fact that the float ring chamber is made with a light filler placed inside it. Nidko1: Th  Figg Nidnost 12 / 3 " " FIG.