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Planetary ball mill

The technology of a planetary ball mill and a ball mill can be applied to grain processing and other directions, which can solve the problems of changing the ratio of the friction effect and impact effect of the grinding ball and the abrasive, the effect of the impact effect is not obvious, and changing, so as to increase the impact force, It is beneficial to the mechanical alloying of abrasives and the effect of improving the efficiency of ball milling

Inactive Publication Date: 2008-03-26
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the eccentricity of the installation of the ball mill pot is fixed, and the different eccentricity cannot be changed due to the different properties of the materials to be ground to change the ratio of friction and impact between the grinding ball and the abrasive.
At the same time, the cross-section of the ball mill tank is a circular structure, and the effect of improving the impact effect is not obvious.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] As shown in Figures 1, 2, and 3 (A), this planetary ball mill includes a ball mill pot 1, a turntable 2, a transmission gear set, and a drive motor 3. The ball mill pot 1 is connected to the turntable 2 and the drive gear set through the rotation shaft 4 respectively The driven gear 5 is connected, and the turntable 2 is connected with the driving gear 7 of the transmission gear set through the revolution shaft 6. The center line is parallel to the geometric center line of the ball mill jar 1 cross section.

[0023] The tops of the respective rotating shafts are fixedly connected with a ball milling pot fastening device, and each ball milling pot fastening device includes a base 10, a gland 11 and a claw 12; The tank 1 is placed in the cup cavity of the base 10; the gland 11 is located above the ball milling tank 1 in the cup-shaped base 10, and there is a screw 13 on the upper side of the gland 11; the middle part of the claw 12 is a screw 13 on the gland 11 For the m...

Embodiment 2

[0029] The structure of the planetary ball mill is the same as in Embodiment 1, wherein the cross-sectional shape of the ball mill tank 1 is shown in Figure 4(A). The cross-section of the ball mill tank of this planetary ball mill is elliptical, with a minor semi-axis b and a major semi-axis a. When b / a=1, the grinding effect is the largest and the impact effect is the smallest; when b / a<1 and the value becomes smaller , the friction effect is reduced, and the impact effect is increased. In order to achieve a better ratio of friction force to impact force, the preferred range of the ratio of the minor semi-axis b to the major semi-axis a of the ellipse is: 0.2≤b / a<1.

Embodiment 3

[0031] The structure of the planetary ball mill is the same as in Embodiment 1, wherein the cross-sectional shape of the ball mill tank 1 is shown in Figure 4(B). The cross-section of the ball mill tank of this planetary ball mill is an equilateral triangle with rounded transitions between adjacent sides, the radius of the rounded corner is r, and the length of the side is M. When r / M becomes smaller, the friction effect decreases and the impact effect increases. In order to achieve a better ratio of friction force to impact force, the preferred range of the ratio of the fillet radius r to the side length M is: 0.05≤r / M≤0.28.

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Abstract

A planetary ball grinder is composed of drive motor, transmission gear train, revolving mainshaft and rotary disc, multiple rotational axles and the ball grinding cylinders rotating around own axle. It features that said ball grinding cylinder is eccentrically installed in such manner that the central line of rotational axle is parallel with the geometric central line of the cross-section of ball grinding cylinder, and its eccentrical degree can be changed for changing the ratio of grinding action to impact action.

Description

technical field [0001] The invention relates to a planetary ball mill, in particular to a planetary ball mill. Background technique [0002] Ball mill is a kind of equipment that adopts ball milling method to prepare ultrafine powder. Ball milling is the main method used in mineral processing, ceramic technology and powder metallurgy for powder mixing, fine grinding, sample preparation, nano-material processing and solid-state alloying of materials. Its principle is to crush materials by impacting and grinding them , this method has a simple process and requires less equipment. [0003] At present, the ball milling pots of all planetary ball mills are cylindrical, and they all rotate with the geometric central axis of the ball milling pot as the rotation axis. It is not obvious, and its impact effect cannot be changed according to different abrasives, so the grinding effect is not ideal. Moreover, the ratio between the grinding action and the impact action cannot be chang...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C17/08B02C17/18B02C17/24
Inventor 任山罗启勇
Owner SUN YAT SEN UNIV
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