Vibrating mill for eliminating low-energy region

Abstract

The utility model belongs to the technical field of grinding, and discloses a vibration mill for eliminating a low-energy region, a power device which is in contact with a grinding medium and a material in a grinding chamber and exerts acting force is arranged in the grinding chamber of the vibration mill; a power source and a transmission mechanism are independently arranged corresponding to the power device; the rotating direction of the power device is consistent with the moving direction of a grinding medium in the grinding chamber; the power device is provided with a power shaft, and the outer surface of the power shaft is provided with protrusions used for applying forced movement force and induced acting force to materials and grinding media during rotation. The rotating center of the power device is positioned on a vertical plane passing through the center of the grinding chamber; the end of the outer edge of the bulge of the power device is flush with the outer circle of the low-energy area of the grinding chamber or protrudes out of the low-energy area of the grinding chamber; and the maximum outer diameter of the bulge is 0.70-0.95 times of the inner diameter of the grinding chamber of the vibrating mill. According to the utility model, the low-energy area of the milling medium in the milling chamber of the vibrating mill completely disappears, so that the milling effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of grinding, and mainly relates to a vibration mill for eliminating low-energy areas. Background Art

[0002] like Figure 1 As shown in the figure, in the circular motion vibration mill, the area A without grinding medium is the buffer zone of the mill; the grinding medium in area B is close to the wall of the mill barrel and has a relatively high movement speed, which is a high-energy area; the grinding medium movement speed in area C is lower as it is closer to the center of the grinding medium, and the lower the energy it has, which is the low-energy area of ​​the mill; the grinding medium in area D is not only stationary, but also forms a solid static column with a certain density with the material. The shape of this static column is elliptical, lying in the central part of the grinding medium, and the length is a certain distance away from the end faces at both ends. This area is called the dead zone, which hinders the flow of grinding medium and materials, occupies the grinding space, reduces the grinding efficiency of the mill, and even crashes. The distribution of each energy zone of the eccentric vibration mill is basically the same as that of the circular motion vibration mill: the high-energy zone is in the area close to the inner wall of the grinding chamber, the dead zone is in the central area of ​​the grinding medium, and the low-energy zone is in the area far away from the inner wall of the grinding chamber; the larger the low-energy zone or dead zone (zero energy zone), the lower the production efficiency of the circular motion vibration mill caused by the low-energy zone, and the dead zone causes the mill to fail to work.

[0003] The existing vibration mills adopt various forms to achieve large volume, such as a single-cylinder vibration mill with vibrators arranged on both sides, the frequency, power and movement direction of the vibrators are the same, the center of the force is on the vertical center plane of the vibration mill, and also on the vertical center plane between the centers of the springs on both sides, and the energy input is increased by means of multiple vibrators on both sides of the grinding chamber, the high energy zone is increased, and thus the diameter of the grinding chamber is increased; a double-cylinder vibration mill with an upper and lower layout, the center of the vibration force is on the vertical plane passing through the center of the double cylinder, and also on the vertical center plane of the springs on both sides, increasing the volume of the vibration mill by 2 times; a double-cylinder vibration mill with an inclined arrangement has its vibration center on the vertical center plane of the springs on both sides, increasing the volume of the vibration mill by 2 times; a three-cylinder, four-cylinder or more-cylinder vibration mill has its vibration center on the center of the parametric mass and on the vertical center plane of the springs on both sides, increasing the volume of the vibration mill by multiple times; although the volume of these vibration mills is increased when they are enlarged, the low energy zone and dead zone in the grinding chamber of the vibration mill are not eliminated, and it is impossible to achieve real enlargement, but instead makes the structure of the vibration mill more complicated, reducing the reliability of the vibration mill.

[0004] Chinese patent CN216631046U discloses a single-cylinder eccentric vibration mill with a power device for eliminating low-energy zones, wherein the rotation center of the power device is located in the grinding chamber between the vertical plane passing through the center of the grinding chamber and the vibrator, and is located below the horizontal plane passing through the center of the grinding chamber; the outer surface of the power shaft of the power device in the grinding chamber has a protrusion for applying forced motion force and induced force to the material and grinding medium during rotation, which can completely eliminate the low-energy zone in the grinding chamber between the vertical plane at the center of the grinding chamber and the vibrator. However, since the power device is closer to the inner wall of one side of the grinding chamber and relatively far from the inner wall of the other side of the grinding chamber, the rotation diameter of the outer edge end of the protrusion is limited by the distance from the inner wall of the grinding chamber and cannot reach the grinding medium area far away from the rotation center of the power device, and this grinding medium area becomes a new low-energy zone. Utility Model Content

[0005] In order to solve the problem of low energy zone of vibration mill, the utility model aims to disclose a vibration mill for eliminating the low energy zone.

[0006] The utility model adopts the following technical solutions to achieve the above purpose:

[0007] A vibration mill for eliminating low-energy zones, wherein a power device is arranged in the grinding chamber of the vibration mill for contacting the grinding medium and materials in the grinding chamber and applying a force; a power source and a transmission mechanism are separately arranged corresponding to the power device; the rotation direction of the power device is consistent with the movement direction of the grinding medium in the grinding chamber; the power device has a power shaft, and the outer surface of the power shaft has a protrusion for applying a forced motion force and an induced force to the materials and grinding medium during rotation; it is characterized in that: the rotation center of the power device is located on a vertical plane passing through the center of the grinding chamber; the outer edge end of the protrusion of the power device is flush with the outer circle of the low-energy zone in the grinding chamber or protrudes from the low-energy zone in the grinding chamber; the maximum outer diameter of the protrusion is 0.70-0.95 times the inner diameter of the grinding chamber of the vibration mill.

[0008] The maximum outer diameter of the protrusion is 0.75-0.95 times the inner diameter of the grinding chamber of the vibration mill.

[0009] The maximum outer diameter of the protrusion is 0.8-0.95 times the inner diameter of the grinding chamber of the vibration mill.

[0010] The rotation center of the power device is located on a vertical plane passing through the center of the grinding chamber, and is located below a horizontal plane passing through the center of the grinding chamber.

[0011] The utility model discloses a vibration mill for eliminating low-energy zones. A power device is arranged in the vibration mill so that the rotation center of the power device is located on a vertical plane passing through the center of a grinding chamber; and a raised outer edge end of the power device is flush with the outer circle of the low-energy zone in the grinding chamber or protrudes from the low-energy zone in the grinding chamber; the diameter of the rotation area of ​​the raised outer edge end is large enough to simultaneously cover all low-energy zones on both sides and the bottom of the grinding chamber, and even cover part of the high-energy zone; when the power device rotates, it drives all the grinding media in the low-energy zones on both sides and the bottom of the grinding chamber to move, and even drives part of the grinding media in the high-energy zones on both sides and the bottom of the grinding chamber to move, so that the low-energy zone of the grinding media in the grinding chamber of the vibration mill disappears completely, thereby improving the grinding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a vibration mill in the prior art.

[0013] Figure 2 This is a schematic structural diagram of Example 1 of the vibration mill of the utility model.

[0014] Figure 3 for Figure 2 Schematic diagram of the internal structure of a medium vibration mill.

[0015] Figure 4 for Figure 2 Schematic diagram of the structure in which the rotation center of the power device of the medium vibration mill is located below the rotation center of the grinding chamber.

[0016] Figure 5 This is a schematic diagram of the structure of Example 2 of the utility model.

[0017] Figure 6 This is a schematic diagram of the internal structure of Example 2 of the utility model.

[0018] Figure 7 This is a schematic diagram of the structure of Example 3 of the utility model.

[0019] Figure 8 This is a prototype picture of the utility model.

[0020] In the figure: 1. Grinding chamber, 101, 103. Grinding chamber end face, 102. Side plate, 104. Feed port, 105. Discharge port, 106. Grinding chamber cavity, 107. Grinding chamber surface, 2. Power device, O. Grinding chamber center, O1. Rotation center, 201. Power shaft, 202. Protruding wear-resistant sleeve, 203. Protrusion, 204. Power shaft wear-resistant sleeve, 205A. Left bearing seat, 205. Right bearing seat, 206. Flexible coupling, 207. Reducer, 208. Coupling, 209. Motor, 212. Long hole, 213. C-type blade, 3. Spring, 4. Grinding medium. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described with reference to the accompanying drawings:

[0022] like Figure 2 Shown and referenced Figure 3 A vibration mill for eliminating low-energy zones, wherein a power device is provided in the grinding chamber 1 of the vibration mill to contact and exert force on the grinding medium 4 and the material in the grinding chamber; the power device 2 is driven to rotate by a separately provided power source and a transmission mechanism, exerting a forced motion force and an induced motion force on the material and the grinding medium 4 in the grinding chamber 1; the rotation direction of the power device is consistent with the motion direction of the grinding medium in the grinding chamber; the power device has a power shaft 201, and the power shaft 201 is connected to the end face 1 of the grinding chamber through a left bearing seat 205A 01 is connected, and is connected to the end face 103 of the grinding chamber through the right bearing seat 205; the outer surface of the power shaft 201 has a protrusion 203 for applying forced motion force and induced force to the material and grinding medium during rotation; the rotation center O1 of the power device is located on the vertical plane aa passing through the center of the grinding chamber; the outer edge end of the protrusion 203 of the power device is flush with the outer circle of the low-energy zone of the grinding chamber or protrudes from the low-energy zone of the grinding chamber; the maximum outer diameter of the protrusion is 0.70-0.95 times the inner diameter of the vibration mill grinding chamber.

[0023] Furthermore, the maximum outer diameter of the protrusion is 0.75-0.95 times the inner diameter of the vibration mill grinding chamber.

[0024] Furthermore, the maximum outer diameter of the protrusion is 0.8-0.95 times the inner diameter of the vibration mill grinding chamber.

[0025] One or both sides of the power shaft 201 are connected to the motor 209 through a flexible coupling 206, a reducer 207, a coupling 208; the motor 209, the reducer 207 and the foundation are rigidly connected; Figure 4 The rotation center of the power device is located on the vertical plane passing through the center of the grinding chamber, and is located below the horizontal plane passing through the center of the grinding chamber; the distance between the rotation center O1 of the power device 2 and the horizontal plane bb passing through the center of the grinding chamber O is e.

[0026] The rotation center of the power device coincides with the center of the grinding chamber. (No examples are given)

[0027] In this embodiment, the power shaft of the power device 2 located in the grinding chamber is cylindrical; the outer surface of the power shaft of the power device 2 located in the grinding chamber has a protrusion 203 for applying forced motion force and induced force to the material and grinding medium 4 when rotating with the power shaft 201, the protrusion 203 is a cylindrical rod, and is provided with a power shaft wear-resistant sleeve 204 and a protrusion wear-resistant sleeve 202.

[0028] The inner cavity 106 of the grinding chamber is filled with grinding media 4 and materials to be ground, and a grinding medium and material flow is formed during operation. A wear-resistant lining plate (not shown in the figure) is arranged at the position in contact with the grinding medium and materials in the inner cavity 106 of the grinding chamber.

[0029] The wear-resistant lining material can be wear-resistant metal, wear-resistant ceramic, wear-resistant organic material, wear-resistant mineral and other materials but not limited to these materials; the wear-resistant lining can be connected to the inner wall of the grinding chamber by bolt connection or adhesive and other methods but not limited to these methods.

[0030] The rotation direction of the vibrator can be clockwise or counterclockwise. When the vibrator rotates clockwise, Figure 4 As shown, the movement direction of the grinding medium 4 is counterclockwise, and the movement center of the grinding medium 4 and the material is biased toward the right side of the grinding chamber; when the vibrator rotates counterclockwise, the movement direction of the grinding medium 4 is clockwise, and the movement center of the grinding medium 4 and the material is biased toward the left side of the grinding chamber, with a larger movement amplitude close to the inner wall of the grinding chamber.

[0031] Working process of vibration mill: the vibrator (not shown in the figure) drives the grinding chamber 1 to vibrate under the support of the spring 3, driving the grinding medium 4 and the material in the inner cavity 106 of the grinding chamber to move, and the inner surface 107 of the grinding chamber pushes the grinding medium 4 and the ground material to flow to the upper part of the inner cavity 106 of the grinding chamber. The flow direction is as shown by arrow A, reaching the upper part of the inner cavity 106 of the grinding chamber, and then moving to the middle and lower part of the inner cavity 106 of the grinding chamber. After reaching the lower part of the inner cavity 106 of the grinding chamber, it is transported to the upper part of the inner cavity 106 of the grinding chamber by the inner surface 107 of the grinding chamber again, forming the flow of grinding medium 4 and grinding material.

[0032] The power shaft 201 of the power device 2 passes through the grinding chamber 1, and its two ends are fixed on the end faces 101 and 103 at the two ends of the grinding chamber 1 through the left bearing seat 205A and the right bearing seat 205 respectively; when the grinding chamber 1 vibrates, the power shaft 201 of the power device 2 also vibrates with the grinding chamber 1 of the mill to obtain vibration energy. The power shaft 201 of the power device 2 can transfer the obtained vibration energy to the grinding medium 4 in the adjacent area, so it also has the function of transmitting the energy of the vibrator; the motor 209 of the power device 2 drives the reducer 207 to work through the coupling 208, and the reducer 207 is connected to the grinding medium 4 through the flexible coupling 206. It is flexibly connected to the power shaft of the power device, driving the power shaft 201 of the power device 2 to rotate around the rotation center O1. The protrusion 203 on the surface of the power shaft of the power device 2 located in the grinding chamber drives the grinding medium 4 and the material in its movement area to move. The movement of the grinding medium 4 is in the direction of arrow B, which is forced to drive the grinding medium 4 that contacts the power shaft 201 and the protrusion 203, and has an inducing effect on the grinding medium 4 that does not contact the power shaft 201 and the protrusion 203; it has an inducing effect on the grinding medium 4 outside the movement area of ​​the power shaft and the protrusion 203, which is the same as the movement direction A of the grinding medium 4 driven by the vibrator 5, but the area is different.

[0033] The power device 2 immersed in the grinding medium drives the grinding medium 4 to move forward, while the power device 2 exposed in the area without grinding medium does not drive the grinding medium 4 to move forward, or drives a small amount of grinding medium 4 to move forward; the amount of grinding medium 4 transported by the power device 2 in the lower part of the grinding chamber 1 is greater than the amount transported by the power device 2 in the upper part of the grinding chamber 1, which makes the grinding medium 4 arch toward one side of the grinding chamber 1, while the grinding medium sinks on one side of the grinding chamber 1, resulting in a height difference of the grinding medium on both sides of the grinding chamber 1; the grinding medium 4 at a high place flows from the arched side to the sunken side of the grinding chamber 1 due to the potential energy, the vibration force of the vibrator and the thrust of the lower grinding medium 4.

[0034] The protrusion 203 on the power shaft of the power device 2 located in the grinding chamber is at a certain distance from the inner wall 107 of the grinding chamber, and does not contact the inner surface 107 of the grinding chamber during operation. The power shaft 201 has a separately arranged power source and transmission mechanism and has reliable support, thereby avoiding large local impact forces caused by contact and collision with the inner surface 107 of the grinding chamber. The power device cooperates with the vibrator to effectively eliminate the low-energy zone or dead zone when the vibration mill is working, thereby greatly improving the energy density.

[0035] The vibrator and the power device 2 jointly drive the grinding medium to move in the grinding chamber cavity 106 . The vibrator mainly drives the grinding medium close to the inner surface 107 of the grinding chamber, while the power device 2 mainly drives the grinding medium away from the inner surface 107 of the grinding chamber.

[0036] By adjusting the vibration force of the vibrator, the flow speed of the grinding medium 4 and the material to be ground near the inner surface 107 of the grinding chamber can be adjusted. The higher the vibration force of the vibrator, the greater the movement amplitude of the mill, the higher the flow speed of the grinding medium 4 and the material to be ground, and the improved grinding capacity.

[0037] The speed of the power device 2 can be adjusted by adjusting the rotation speed of the motor 209, thereby changing the speed of the grinding medium in the power shaft 201 and the protrusion 203 area in the grinding chamber cavity 106. The higher the rotation speed, the higher the flow speed of the grinding medium 4 and the material to be ground, and the higher the grinding capacity.

[0038] Figure 5 , Figure 6 It is a structural schematic diagram of Example 2 of the utility model. In this embodiment, the connection method between the power unit 2 and the grinding chamber 1 is the same as that of Example 1; the power shaft of the power unit 2 located in the grinding chamber is square in shape, and has a disc-shaped protrusion 203, a protrusion wear-resistant sleeve 202, a power shaft wear-resistant sleeve 204 on its outer surface, and a long hole 212 on the disc-shaped protrusion; one side or both sides of the power shaft 201 are connected to the motor 209 through a flexible coupling 206, a reducer 207, and a coupling 208, and the motor 209 and the reducer 207 are rigidly connected to the foundation.

[0039] The working process of the present embodiment 2 is the same as that of the embodiment 1, except that the shape of the protrusion of the power shaft is different.

[0040] Figure 7 It is a schematic diagram of the structure of Example 3 of the utility model. In this embodiment, the power device 2 is located in the grinding chamber, and there are C-shaped blades 213 on both sides and the outer side of the edge of the disc-shaped protrusion 203 on the outer surface of the power shaft, which increases the axial contact amount between the power device 2 and the grinding medium 4 and the material in the grinding chamber 2.

[0041] The working process of this embodiment 3 is the same as that of embodiment 2, except that there are C-shaped blades 213 on both sides and the outer side of the edge of the power shaft protrusion 203, which increases the axial contact number between the power device 2, the grinding medium 4 and the material, increases the energy input to the grinding medium 4, and increases the energy density in the grinding chamber 1.

Claims

1. A vibration mill for eliminating low-energy zones, wherein a power device is provided in the grinding chamber of the vibration mill to contact the grinding medium and materials in the grinding chamber and exert a force; a power source and a transmission mechanism are separately provided corresponding to the power device; the rotation direction of the power device is consistent with the movement direction of the grinding medium in the grinding chamber; the power device has a power shaft, and the outer surface of the power shaft has protrusions for exerting forced motion force and induced force on the materials and grinding medium during rotation; characterized in that: The rotation center of the power device is located on a vertical plane passing through the center of the grinding chamber; the outer edge end of the protrusion of the power device is flush with the outer circle of the low-energy zone of the grinding chamber or protrudes from the low-energy zone of the grinding chamber; the maximum outer diameter of the protrusion is 0.70-0.95 times the inner diameter of the vibration mill grinding chamber.

2. A vibration mill for eliminating low energy areas as claimed in claim 1, characterized in that: The maximum outer diameter of the protrusion is 0.75-0.95 times the inner diameter of the grinding chamber of the vibration mill.

3. A vibration mill for eliminating low energy areas as claimed in claim 1, characterized in that: The maximum outer diameter of the protrusion is 0.8-0.95 times the inner diameter of the grinding chamber of the vibration mill.

4. A vibration mill for eliminating low energy areas as claimed in claim 1, characterized in that: The rotation center of the power device is located on a vertical plane passing through the center of the grinding chamber, and is located below a horizontal plane passing through the center of the grinding chamber.

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