SU1694217A1 - Drum mill - Google Patents

Abstract

The invention relates to the grinding of ores, rocks, solid materials by drum mills in the mining, metallurgical, chemical industries, in enrichment, and the production of building materials. The purpose of the invention is to simplify the design. Drum pins are mounted in sliders, which are mounted in the guides of the mill housing with the possibility of directional vibrations. The drive of rotation and oscillation of the drum contains at least one pair of coupled gears, one of which has an initial surface with a variable radius vector of the profile. In this engagement, the wheel mounted on the drum is fully inserted with its teeth into the drive wheel coupled to it without side gaps between the teeth. 4 hp ff, 5 ill.

Description

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The invention relates to the grinding of ores, rocks, materials, namely, drum mills, in particular, vibratory action, including ball grinding, and can be used in the chemical, food, metallurgical and other industries, in enrichment, construction and special materials in laboratory practice.

The purpose of the invention is to simplify the design.

FIG. 1 shows a schematic diagram of the proposed mill, front view; figure 2 - the same. end view; Fig. 3 shows an embodiment of the mill, end view; figure 4 is a diagram of a variant with multiple drums; figure 5 is a diagram of a variant with a round drive wheel in the drive.

The mill contains the boot 1 and unloading 2 devices, the support frame 3, the grinding drum 4 and the drive motor 5. The drive is served by two driving gears b on the drive shaft 7 installed in the supports 8, and two driven gears 9 coupled to them 9. Each of the latter, it is made with a profile 10 of the initial surface .. Each drum 11 of the drum 4 is mounted by means of a bearing in a guide assembly, which in this case is designed as a rocker arm 13 pulled down with an elastic element 12 with an axis 14 and a bearing 15. Shaft 7 Inonii clutch 5 from the engine 16.

Said profile 10 of wheels 9 has a radius vector 17 of variable length in polar coordinates with a pole 18 on the axis of rotation of the drum 4 and the wheel 9.

ABOUT

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The radius vector preferably has a periodically varying length.

The drum 4 may contain grinding balls 19 or other working bodies.

A special feature of the gear train is that, as a result of the forced clamping, under the action of, in particular, the elastic element 12, the side gaps between the teeth 20 of the driven wheel 9 and the drive wheel 6 in the engagement zone 21 have a zero value. The rotation of the wheels 6 leads to the rotation of the drum 4 and at the same time to its vibrations (swings) on the rocker arms 13. The forced mode in this case is carried out under the action of the elastic element 12, the gravity of the drum weight with the masses attached to it and the variable inertia forces x

In the embodiment of the mill (FIG. 3), the pinching function 22 can be performed on the shaft 23 mounted, like the shaft 7, in the frame supports 3. This pair of gears is coupled to the driven wheels 9, as well as the driving wheels 6, but with diametrically opposite side. At the same time, the radius vector of the wheel profile 9 (Fig. 3) has a periodically varying length with an odd number of periods of change.

The guide assembly can be made in this case in the form of a rocker arm 13 on the pin 11 of the drum, i.e. in the form of a rolling pair (Fig. 3), a slide, and other equivalent circuits with rectilinear oscillations of the rocker arm with the drum, while simultaneously rotating around its own axis. Outside the drum and bearing supports of the shafts 7 and 23, an additional gear, not shown in FIG. 3, can be mounted for unloading gear wheels, b, 9.22. The upper and lower wheels of this gear are mounted on the shaft extensions, respectively, 23 and 7 (the distance between them is constant), and the intermediate wheel coupled to them rotates on an axis mounted separately on the frame 3,

In the embodiment of the mill with several grinding drums of Fig. 4, they are arranged around the drive wheel 6, the radius vector of the profile of the latter having a periodically varying length with an even number of periods of change.

The drive wheels 6 mounted on the drive shaft 7. The drums are equipped with rocker arms on the pins of the drums with an elastic element (springs) 12 clamping the driven round wheels 9 to the drive.

The direction of the straight-line oscillations of the rocker arms 13 may not be radial; 4, rocker guides

performed deaxially. An even number of periods of change in the length of the radius of the wheel L and of the drums (preferably twice the number of the latter) in the construction according to

figure 4 provides its dynamic balance.

The greatest simplification of the drive design (figure 5) is achieved with a round drive wheel b with an eccentric offset

0 by the axis of rotation of the shaft 7. The yoke 13 carrying the drum axle 11 may be tied against the upper cross member of the frame 3. However, at a low frequency of oscillation and rotation of the drum

5 tons of tin may be sufficient to press the driven cylindrical wheel 9 (Fig. 5) to the drive wheel 6. The latter is advisable to perform with an adjustable eccentricity in a known way.

During the operation of the mill, the raw material loaded through the device 1 (Fig. 1) is crushed in the grinding drum 4 due to its complicated movement as a result of rotation and vibrations. This is achieved due to the wavy configuration of the initial surface profile of one of the gear wheels 6, 9.

Gear operation

0 with a zero side gaps between the teeth of engagement with the force of the clamping wheels provides a simplified design.

Claims (4)

Invention Formula 5 1. A drum mill containing a support frame, a drum with trunnions in guide assemblies and a drive with at least one pair of coupled gears, one of which is made with an initial surface profile having a radius vector of variable length, different from that, in order to simplify the design, the driven gear is mounted with zero side gaps between 5 teeth of engagement and forced clamp to the drive gear. 2. A mill according to claim 1, characterized in that each assembly of the guides is made in the form of a rocker arm, a hingedly mounted drum on the trunnion. 3. The mill according to claim 1, characterized in that its drive is equipped with a gear connected with a driven wheel with a side diametrically opposite the drive wheel, and the radius vector of the driven wheel profile has a periodically varying length with an odd number of periods. 4. A mill according to claim 1, characterized in that it is provided with additional drums with trunnions, guides, veFig. five Editor T. Loshkareva Compiled by Y. Khechanov Tehred M. Morgental Order 4109Discount VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, 4/5 Raushsk nab. Production and Publishing Combine Patent, Uzhgorod, Gagarin st., 101 Proofreader O. Kundrik home wheels, and the radius vector of the drive wheel profile has a periodically varying length with an even number of periods, with the drums arranged around the circle. 5, Mill pop-1, characterized in that the drive wheel is made round with an eccentrically shifted axis of rotation. Fig 1 15 3 2