Energy-saving and high-efficiency planetary ball mill

Abstract

This invention relates to the field of ball mill equipment technology, specifically to an energy-saving and efficient ball mill design, which mainly includes: an overall frame, a grinding cylinder assembly, a grinding cylinder assembly support and bearings, a support bearing for the assembly of the grinding cylinder assembly, a main drive wheel, a moving gear, a stationary gear, and a motor power transmission device. The beneficial effects of this invention are that it can save electricity and achieve efficient and fast grinding.

Description

Technical Field

[0001] This invention relates to the field of ball mill equipment technology, specifically to an energy-saving and high-efficiency planetary ball mill design. Background Technology

[0002] Ball mills are key equipment for further grinding, mixing, and homogenizing materials after they have been crushed. They are widely used in industries such as cement, silicate products, new building materials, mineral processing, and glass ceramics for dry or wet grinding of various ores and other grindable materials. Ball mills are suitable for grinding various ores and other materials.

[0003] Currently, ceramic ball mills are mainly divided into batch ball mills and continuous ball mills. Ceramic slurries are usually viscous with a solid content of around 60%, so batch ball mills are the primary type, with continuous ball mills used as a supplement. Continuous ball mills are mainly used in industries such as cement, iron ore, and copper ore beneficiation.

[0004] A ball mill consists of a horizontal cylindrical body, inlet and outlet ports, and bearing assemblies. The cylindrical body is a long cylinder containing grinding media. The cylinder is made of steel plate and is fixed to the body with lining bricks. The grinding media are generally alumina spheres or alloy steel balls, which are loaded into the cylinder according to different diameters and a certain ratio. The material is fed into the cylinder through the inlet. When the ball mill cylinder rotates, the grinding media, due to inertia, centrifugal force, and friction, adhere to the lining bricks near the cylinder and are carried away by the cylinder. When they are carried to a certain height, they are thrown down or slide down due to their own gravity. The falling grinding media crush the material inside the cylinder.

[0005] Current intermittent and continuous ceramic ball mills have simple structures, but their grinding efficiency is low and their energy consumption is relatively high. The main reason is that after the ball mill is filled with materials, grinding balls and water, its center of gravity is seriously deviated from the original cylinder axis center line. The center of gravity is located below one side of the overall axis center line of the ball mill. When the ball mill rotates, the high specific gravity balls will also be biased towards the rising side of the cylinder, which makes the drive motor work hard and has a large load.

[0006] Another drawback is that existing ball mills have slow rotation speeds and cannot rotate at high speeds, resulting in low grinding efficiency per unit time. Summary of the Invention

[0007] To address the problems of traditional ball mills where the center of gravity is biased towards the upward side of rotation, resulting in unequal weight distribution on both sides of the mill's center (especially the downward side being lighter) and the overall center of gravity being significantly deviated from the mill's axis, as well as the slow rotation speed, inability to achieve high-speed rotation, and low grinding efficiency of existing ball mills, the inventors have provided a novel planetary ball mill design that is both energy-saving and provides more efficient grinding, offering a solution that achieves the best of both worlds.

[0008] An energy-efficient and high-efficiency planetary ball mill mainly includes: an integral frame, a grinding cylinder assembly, a grinding cylinder assembly support and bearings, a support bearing for the assembly of the grinding cylinder assemblies, a main drive wheel, a moving gear, a stationary gear, and a motor power transmission device. Its characteristic is that the grinding cylinder assembly is composed of at least two grinding cylinders. The energy-efficient and high-efficiency planetary ball mill of this invention is characterized by: at least two grinding cylinder assemblies arranged in an anti-symmetrical pattern around a central axis; and the diameter ratio of the stationary gear to the moving gear being greater than 1, preferably greater than 2. The diameter of a single grinding cylinder is greater than 3 meters, typically set to rotate 20-120 revolutions per minute and revolve 10-60 revolutions per minute. For grinding cylinders with a diameter less than 3 meters, their rotation speed is set separately according to specific working conditions.

[0009] The grinding cylinder assembly of this invention is characterized in that the grinding cylinders have the same structural shape and are arranged symmetrically around their common rotation axis. The self-rotating grinding cylinder assembly consists of two grinding cylinders, three grinding cylinders, four grinding cylinders, five grinding cylinders, etc., and is arranged symmetrically around its rotation axis. The orbital grinding cylinder assembly consists of two or more identical grinding cylinders, and all the grinding cylinder assemblies are arranged symmetrically around their orbital axis. For example, three grinding cylinders are grouped together to form a planetary grinding device. The three identical grinding cylinder assemblies form an equilateral triangle, with the central axis of the triangle serving as the rotation axis of the grinding cylinder assembly. They are fixedly connected to a common support via bearings. The three grinding cylinder assemblies are arranged in an equilateral triangle, with the central axis of the triangle as their common axis of revolution. They are fixed to the base of the overall support via bearings. One end of the common support of the three grinding cylinders is equipped with a drive pulley, and the three rotation axes are equipped with three moving gears. On the same side of the base, a fixed gear is mounted, which is closely connected to the three moving gears. A drive motor is mounted on the base of the overall support and connected to the main drive pulley via a belt or gears. When the drive motor is energized, it drives the main drive belt to rotate, which in turn drives the overall support and grinding cylinders to rotate. Simultaneously, each individual cylinder rotates at high speed through the gear ratio between the moving and fixed gears.

[0010] This invention discloses an energy-efficient planetary ball mill, characterized in that the multiple grinding cylinder assembly refers to a combination of at least two individual grinding cylinders, with each grinding cylinder connected in a regularly distributed 360-degree circumferential pattern. Preferably, the projection images of all the partition plates along the center line of the grinding cylinder's rotation axis are translated and overlapped in the same concentric rotation direction to precisely bisect the circumference.

[0011] This invention discloses an energy-saving and high-efficiency planetary ball mill, characterized in that the transmission device mainly includes a motor, a gearbox, and gears or pulleys. The planetary ball mill of this invention is characterized in that, if belt drive is used, it mainly consists of a motor pulley, a cylinder belt ring, or a rotating shaft pulley; if gear drive is used, it mainly consists of a motor gear, a cylinder gear ring, or a rotating shaft gear disc, wherein the transmission method further includes: direct motor drive.

[0012] The beneficial effect of this invention is that it minimizes the bias of the working center of gravity of the ball mill towards the upward direction of rotation, making the weight on both sides of the working center of the novel planetary ball mill of this invention almost equal. This results in both energy savings and high-efficiency, rapid grinding. The novel planetary ball mill of this invention is more energy-efficient.

[0013] To better understand the purpose of this invention, four grinding cylinders are grouped together, and the four groups of cylinders are arranged in a combined manner. The structure of the four individual cylinders in a static state is illustrated in the explanation. Attached Figure Description Figure 1 This is a schematic diagram of one of the four sets of grinding cylinders and moving gears. Figure 2 This is a schematic diagram of a combination of four moving gears and one fixed gear. The diagram shows: 1. Grinding cylinder, 2. Rotation shaft, 3. Revolution shaft, 4. Fixed gear, 5. Moving gear, 6. Support for four sets of grinding cylinders.

Claims

1. An energy efficient planetary ball mill comprising of: The whole machine frame, the grinding cylinder group, the grinding cylinder group support and bearing, the support bearing of the assembly of the cylinder group, the main transmission wheel, the driving gear, the driven gear and the power transmission device are characterized in that the grinding cylinder group is composed of at least two grinding cylinder groups.

2. An energy efficient planetary ball mill as claimed in claim 1, wherein The grinding cylinder group is at least two groups and is arranged in a symmetrical rule around the center of the revolution axis.

3. An energy efficient planetary ball mill as claimed in claim 1 wherein The diameter ratio of the driven gear and the driving gear is greater than 1, preferably greater than 2.

4. An energy efficient planetary ball mill as claimed in claim 1 wherein The grinding cylinder group is at least two groups with the same structure and is arranged in a symmetrical rule around the common revolution axis.

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