Energy-saving cylindrical ball mill device

Abstract

The utility model relates to an energy-saving barrel type ball mill device which comprises a ball mill barrel and a direct drive motor, a feeding shaft is installed at the feeding end of the ball mill barrel, a feeding port is formed in the end of the feeding shaft, a discharging shaft is installed at the discharging end of the ball mill barrel, the direct drive motor is arranged at the end of the discharging shaft, and the direct drive motor is installed on one side of the discharging port. The feeding shaft is connected with a feeding port, the discharging shaft is connected with a motor shaft of the direct-drive motor through a coupler, the feeding shaft, the discharging shaft and the motor shaft are hollow shafts and are coaxially arranged along the center line of the ball mill barrel, spiral auger sleeves are inserted into the motor shaft and the discharging shaft, and materials entering from the feeding port enter the ball mill barrel along the feeding shaft to be ground and then are conveyed into the ball mill barrel. The materials are output from the discharge port when rotating by the spiral auger sleeve in the discharge shaft and the motor shaft; according to the utility model, a gear reduction box and a large and small gear set in the traditional cylinder type ball mill are all canceled, and the cylinder type ball mill is directly driven by the motor, so that the cylinder type ball mill is suitable for manufacturing new equipment and modifying cylinder type ball mills in stock markets, and has high transmission efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of ball mills, and particularly to an energy-saving cylindrical ball mill device. Background Art

[0002] A ball mill is a key device for crushing materials and then pulverizing them, and is widely used in industries such as building materials, mineral processing, and chemical engineering. The disadvantage of a ball mill is its low electric energy utilization efficiency, only 2% - 3%, and there is great potential for energy conservation to be tapped. Energy conservation is an inevitable trend for ball mills. There are many directions to start with for reducing the energy consumption of ball mills, and one very important direction is to improve the transmission efficiency of the ball mill.

[0003] For a traditional cylindrical ball mill, the transmission part consists of a three-phase asynchronous motor + a gear reduction box + large and small gears, and there are also two groups of couplings in the middle. The rated speed of a three-phase asynchronous motor is generally 1480 r / min, 980 r / min, or 740 r / min. First, it is decelerated by the gear reduction box, and then further decelerated to the required speed by the large and small gear sets. The total transmission efficiency is the product of the efficiencies of each transmission component. Therefore, the transmission efficiency of the traditional cylindrical ball mill is low.

[0004] In order to improve the transmission efficiency, there is a method of directly driving with a permanent magnet synchronous motor, replacing the original three-phase asynchronous motor + gear reduction box with a low-speed and high-torque permanent magnet synchronous motor, but the large and small gear sets are still retained, and there is still room for improving the transmission efficiency; there is a method of directly driving with a ring permanent magnet, with the rotor part of the motor embedded on the ball mill cylinder body, integrating the motor with the ball mill cylinder body. In this way, the gear reduction box and the large and small gear sets can be completely eliminated, leaving only the motor as the transmission component. This method has the highest transmission efficiency, but the size of the ring permanent magnet direct drive motor is restricted by the diameter of the ball mill cylinder body. If it is used for the transformation of medium and large-sized cylindrical ball mills in the existing market, there are problems of large construction volume and long cycle for the transformation, which affect normal production.

[0005] In summary, the following main deficiencies exist:

[0006] (1) When directly driving with a permanent magnet synchronous motor and replacing the original three-phase asynchronous motor + gear reduction box with a low-speed and high-torque permanent magnet synchronous motor, the large and small gear sets are still retained, and there is still room for improving the transmission efficiency.

[0007] (2) When directly driving with a ring permanent magnet and integrating the motor with the ball mill cylinder body, the transmission efficiency is the highest, but the size of the ring permanent magnet direct drive motor is restricted by the diameter of the ball mill cylinder body. If it is used for the transformation of medium and large-sized cylindrical ball mills in the existing market, there are problems of large construction volume and long cycle for the transformation, which affect normal production. Summary of the Utility Model

[0008] The object of the present utility model is to solve the above deficiencies and provide an energy-saving cylindrical ball mill device, which can completely cancel the gear speed reducer and the large and small gear sets in the traditional cylindrical ball mill, directly drive the cylindrical ball mill by the motor, is suitable for both the manufacture of new equipment and the transformation of the cylindrical ball mills in the existing market, and has high transmission efficiency.

[0009] To achieve the above object, an energy-saving cylindrical ball mill device is designed, which includes a ball mill cylinder body 7 and a direct drive motor 2. An inlet shaft 8 is installed at the feeding end of the ball mill cylinder body 7. A feeding port 9 is arranged at the end of the inlet shaft 8. A discharge shaft 5 is installed at the discharging end of the ball mill cylinder body 7. A direct drive motor 2 is arranged at the end of the discharge shaft 5. The direct drive motor 2 is installed on one side of the discharge port 1. The discharge shaft 5 is connected to the motor shaft 10 of the direct drive motor 2 through a coupling 4. The inlet shaft 8, the discharge shaft 5, and the motor shaft 10 are all hollow shafts and are coaxially arranged along the center line of the ball mill cylinder body 7. A spiral auger sleeve 3 is inserted into the motor shaft 10 and the discharge shaft 5. After the material entering from the feeding port 9 enters the ball mill cylinder body 7 along the inlet shaft 8 for grinding, it is output from the discharge port 1 by the rotation of the spiral auger sleeve 3 through the inside of the discharge shaft 5 and the motor shaft 10.

[0010] Further, the motor shaft 10 is a double-shaft extension hollow shaft. The driving end of the direct drive motor 2 is connected to the discharge shaft 5 through a coupling 4, and the non-driving end of the direct drive motor 2 is the discharge port 1.

[0011] Further, the inner diameter of the motor shaft 10 is the same as the inner diameter of the discharge shaft 5. The outer wall of the spiral auger sleeve 3 is provided with a plastic lining layer and is in clearance fit with the motor shaft 10 and the discharge shaft 5, so as to protect the motor shaft and the discharge shaft, improve the service life, and reduce the maintenance cost.

[0012] Further, the spiral auger sleeve 3 is fixed to the non-driving end of the motor shaft 10 by bolts 13, so that the spiral auger sleeve does not rotate relative to the motor shaft and the discharge shaft and does not rub during the operation of the motor, avoiding abrasion of the motor shaft and the discharge shaft.

[0013] Further, the direct drive motor 2 adopts a compact disc type structure with a large diameter and a narrow length. The cooling fan 11 of the direct drive motor 2 adopts a structure of multiple small fans. The cooling fan 11 is installed on the upper side of the torus of the direct drive motor 2, so that the cooling effect is better.

[0014] Further, bearing components 6 are installed at both the inlet shaft 8 and the discharge shaft 5. The direct drive motor 2 is connected to the control cabinet 12 through a circuit.

[0015] Further, the screw auger sleeve 3 includes a sleeve 14 and a screw auger 15 disposed inside the sleeve 14. The screw auger 15 is a spiral blade fixedly connected to the inner wall of the sleeve 14. The spiral blade extends along the axial direction of the sleeve 14, which can promote the efficient transmission of materials, has high reliability, makes the materials not easy to precipitate, and then smoothly conveys them to the discharge port, avoiding the precipitation of materials at the bottom of the sleeve.

[0016] Further, a lining plate is installed on the inner wall of the ball mill cylinder 7. The lining plate is in a discrete stepped shape or a spiral line shape. Damping holes are distributed on the back of the lining plate, and damping shock-absorbing materials are filled in the damping holes, which can continuously push the materials, make the materials continuously fall, and at the same time, the filled damping materials can improve the internal damping performance.

[0017] Compared with the prior art, the present utility model provides a new structure of a cylindrical ball mill, which can cancel all the gear reduction boxes and large and small gear sets in the traditional cylindrical ball mill, and directly drive the cylindrical ball mill by a motor. It is suitable for both the manufacture of new equipment and the transformation of existing cylindrical ball mills in the stock market. It has high transmission efficiency and is more convenient for later maintenance. Moreover, the outer wall of the screw auger sleeve of the present utility model is lined with plastic and is in clearance fit with the motor shaft and the discharge shaft, and is fixed to the non-driven end of the motor shaft with several bolts. Therefore, when the motor runs, there is no relative rotation or friction between the screw auger sleeve and the motor shaft and the discharge shaft, avoiding abrasion to the motor shaft and the discharge shaft. The plastic lining on the outer wall can also protect the motor shaft and the discharge shaft, improve the service life, and reduce the maintenance cost. In addition, in order to shorten the conveying distance of the screw auger and reduce the energy consumption of material conveying, the direct drive motor of the present utility model adopts a compact disc structure with a large diameter and a narrow length. At the same time, because the direct drive motor is close to the discharge port, the motor cooling fan is changed to a structure of multiple small fans, which are installed on the upper side of the motor ring surface, and the cooling effect is better. [Description of the Drawings]

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the screw auger sleeve of the present utility model;

[0020] In the figure: 1, discharge port; 2, direct drive motor; 3, screw auger sleeve; 4, coupling; 5, discharge shaft; 6, bearing component; 7, ball mill cylinder; 8, feed shaft; 9, feed port; 10, motor shaft; 11, cooling fan; 12, control cabinet; 13, bolt; 14, sleeve; 15, screw auger. [Detailed Embodiments]

[0021] As shown in the attached drawings, the present utility model provides an energy-saving cylindrical ball mill device, which includes a ball mill cylinder body 7 and a direct drive motor 2. An inlet shaft 8 is installed at the feed end of the ball mill cylinder body 7, and a feed port 9 is provided at the end of the inlet shaft 8. A discharge shaft 5 is installed at the discharge end of the ball mill cylinder body 7, and a direct drive motor 2 is provided at the end of the discharge shaft 5. The direct drive motor 2 is installed on one side of the discharge port 1. The discharge shaft 5 is connected to the motor shaft 10 of the direct drive motor 2 through a coupling 4. The inlet shaft 8, the discharge shaft 5, and the motor shaft 10 are all hollow shafts and are coaxially arranged along the center line of the ball mill cylinder body 7. A spiral auger sleeve 3 is inserted into the motor shaft 10 and the discharge shaft 5. After the material entering from the feed port 9 enters the ball mill cylinder body 7 along the inlet shaft 8 for grinding, it is output from the discharge port 1 by the rotation of the spiral auger sleeve 3 inside the discharge shaft 5 and the motor shaft 10. Bearing components 6 are installed at both the inlet shaft 8 and the discharge shaft 5. The direct drive motor 2 is connected to the control cabinet 12 through a circuit.

[0022] Among them, the motor shaft 10 is a double-shaft extension hollow shaft. The drive end of the direct drive motor 2 is connected to the discharge shaft 5 through a coupling 4, and the non-drive end of the direct drive motor 2 is the discharge port 1. The inner diameter of the motor shaft 10 is the same as the inner diameter of the discharge shaft 5. The outer wall of the spiral auger sleeve 3 is provided with a plastic lining layer and is in clearance fit with the motor shaft 10 and the discharge shaft 5, so as to protect the motor shaft and the discharge shaft, improve the service life, and reduce the maintenance cost. The spiral auger sleeve 3 is fixed to the non-drive end of the motor shaft 10 by bolts 13, so that there is no relative rotation and no friction between the spiral auger sleeve and the motor shaft and the discharge shaft during the operation of the motor, avoiding wear on the motor shaft and the discharge shaft. The direct drive motor 2 adopts a compact disc structure with a large diameter and a narrow length. The cooling fan 11 of the direct drive motor 2 adopts a structure of multiple small fans. The cooling fan 11 is installed on the upper side of the ring surface of the direct drive motor 2, so that the cooling effect is better.

[0023] The spiral auger sleeve 3 includes a sleeve 14 and a spiral auger 15 provided inside the sleeve 14. The spiral auger 15 is a spiral blade fixedly connected to the inner wall of the sleeve 14. The spiral blade extends along the axial direction of the sleeve 14, so as to promote the efficient transmission of materials, with high reliability, making it difficult for the materials to precipitate, and then smoothly transmitting them to the discharge port, avoiding the precipitation of materials at the bottom of the sleeve. Liners are installed on the inner wall of the ball mill cylinder body 7. The liners are in a discrete stepped shape or a spiral shape. Damping holes are distributed on the back of the liners, and damping shock-absorbing materials are filled in the damping holes, so as to continuously push the materials, make the materials continuously fall, and at the same time, the filled damping materials can improve the internal damping performance.

[0024] The following further describes the present utility model in conjunction with the attached drawings and specific embodiments:

[0025] The drum ball mill mainly consists of a discharge port 1, a direct drive motor 2, a spiral auger sleeve 3, a coupling 4, a discharge shaft 5, a bearing component 6, a ball mill barrel 7, a feed shaft 8, a feed port 9, a motor shaft 10, and a control cabinet 12. The direct drive motor 2 is installed on one side of the discharge port 1. The feed shaft 8, the discharge shaft 5, and the motor shaft 10 are all hollow shafts arranged along the center line; the motor shaft 10 is a double-axis hollow shaft, the motor driving end is connected to the discharge shaft 5 through the coupling 4, and the non-driving end is the discharge port 1. The discharge port 1 and the feed port 9 are still located at both ends of the ball mill axis. Like the traditional drum ball mill, the coarse material can continuously enter from the feed port 9 and enter the ball mill barrel 7 along the inside of the feed shaft 8. The ground fine material passes through the inside of the discharge shaft 5 and the inside of the motor shaft 10 and is taken out from the discharge port 1 when the spiral auger sleeve 3 rotates.

[0026] In order to protect the shaft of important components from wear and tear of conveyed materials and to avoid maintenance, as well as to facilitate the manufacture and installation of the spiral auger, the spiral auger sleeve 3 is inserted into the motor shaft 10 and the discharge shaft 5. The inner diameter of the motor shaft 10 is the same as that of the discharge shaft 5. The outer wall of the spiral auger sleeve 3 is lined with plastic and has clearances with the motor shaft 10 and the discharge shaft 5. It is fixed to the non-driving end of the motor shaft 10 with a number of bolts 3-1. In this way, when the motor is running, there is no relative rotation or friction between the spiral auger sleeve 3 and the motor shaft 10 and the discharge shaft 5, which avoids wear on the motor shaft 10 and the discharge shaft 5. The outer wall lining can also protect the motor shaft 10 and the discharge shaft 5, thereby increasing service life and reducing maintenance costs.

[0027] With the above structure, when the direct drive motor 2 is started, the rotor part of the drum ball mill can be directly driven to rotate through the coupling 4. In addition to the motor 2 and the coupling 4, there is no other transmission chain. The transmission efficiency of the coupling 4 is close to 100%. At this time, the motor operation efficiency is the total transmission efficiency.

[0028] In order to shorten the conveying distance of the spiral auger and reduce the energy consumption of material conveying, the direct drive motor 2 adopts a compact disc structure with a large diameter and narrow length. At the same time, because the direct drive motor 2 is close to the discharge port, the motor cooling fan should not be installed at the tail of the motor. The motor cooling fan 11 is changed to a structure of multiple small fans, which are installed on the upper side of the motor ring surface to dissipate heat from the motor, thereby achieving a better heat dissipation effect.

[0029] In addition, for the transformation of the existing market cylindrical ball mill, the bearing component 6, ball mill barrel 7, feed shaft 8, and feed port 9 are retained. It is only necessary to remove the original transmission device (three-phase asynchronous motor + gear reducer + large and small gear sets), replace the discharge shaft 5, and add a direct drive motor 2, coupling 4, and spiral auger sleeve 3. Compared with the annular permanent magnet direct drive, under the premise of basically the same transmission efficiency, on-site transformation can be quickly implemented, the transformation is very convenient, and the later motor maintenance is more convenient.

[0030] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Standard parts used can be purchased from the market, and special-shaped parts can be customized according to the descriptions in the specification and the attached drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connections adopt conventional connection methods in the prior art, which will not be elaborated here.

[0031] The present utility model is not limited by the above-mentioned embodiments. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and are all included in the protection scope of the present utility model.

Claims

1. An energy-saving cylindrical ball mill device, characterized in that: The invention comprises a ball mill barrel (7) and a direct drive motor (2), wherein a feed shaft (8) is installed at the feed end of the ball mill barrel (7), and a feed port (9) is arranged at the end of the feed shaft (8); a discharge shaft (5) is installed at the discharge end of the ball mill barrel (7), and a direct drive motor (2) is arranged at the end of the discharge shaft (5); the direct drive motor (2) is installed on one side of the discharge port (1), and the discharge shaft (5) is connected to the motor of the direct drive motor (2) via a coupling (4). The machine shaft (10), the feed shaft (8), the discharge shaft (5), and the motor shaft (10) are all hollow shafts and are coaxially arranged along the center line of the ball mill barrel (7). A spiral auger sleeve (3) is inserted into the motor shaft (10) and the discharge shaft (5). The material entering from the feed port (9) enters the ball mill barrel (7) along the feed shaft (8) and is ground. Then, the material is discharged from the discharge port (1) when the spiral auger sleeve (3) rotates inside the discharge shaft (5) and the motor shaft (10).

2. The energy-saving drum ball mill device according to claim 1, characterized in that: The motor shaft (10) is a double-extended hollow shaft, the driving end of the direct-drive motor (2) is connected to the discharge shaft (5) via a coupling (4), and the non-driving end of the direct-drive motor (2) is a discharge port (1).

3. The energy-saving drum ball mill device according to claim 1, characterized in that: The inner diameter of the motor shaft (10) is the same as the inner diameter of the discharge shaft (5); the outer wall of the spiral auger sleeve (3) is provided with a plastic lining layer and is clearance-matched with the motor shaft (10) and the discharge shaft (5).

4. The energy-saving drum ball mill device according to claim 3, characterized in that: The spiral auger sleeve (3) and the non-driving end of the motor shaft (10) are fixed by bolts (13).

5. The energy-saving drum ball mill device according to claim 1, characterized in that: The direct-drive motor (2) adopts a compact disc structure with a large diameter and a narrow length. The heat dissipation fan (11) of the direct-drive motor (2) adopts a structure of multiple small fans. The heat dissipation fan (11) is installed on the upper side of the annular surface of the direct-drive motor (2).

6. The energy-saving drum ball mill device according to claim 1, characterized in that: The feed shaft (8) and the discharge shaft (5) are both provided with bearing components (6), and the direct drive motor (2) is connected to a control cabinet (12) via a line.

7. The energy-saving drum ball mill device according to any one of claims 1 to 6, characterized in that: The spiral auger sleeve (3) comprises a sleeve (14) and a spiral auger (15) arranged inside the sleeve (14); the spiral auger (15) is a spiral blade fixedly connected to the inner wall of the sleeve (14); the spiral blade is arranged to extend axially along the sleeve (14).

8. The energy-saving drum ball mill device according to any one of claims 1 to 6, characterized in that: A lining plate is installed on the inner wall of the ball mill barrel (7), and the lining plate is in a discrete step shape or a spiral shape. Damping holes are distributed on the back of the lining plate, and the damping holes are filled with damping and shock-absorbing materials.

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