Built-in edge transmission structure of ball mill with over-limit rotating speed

Abstract

The utility model provides a built-in edge transmission structure of an over-limit rotating speed ball mill, which is convenient to install and maintain and is suitable for the over-limit rotating speed ball mill. According to the built-in edge transmission structure of the ball mill with the over-limit rotating speed, the ball mill comprises a rack, a barrel, an impact driving mechanism, a driven gear, a driving gear and a barrel driving mechanism, the driven gear is fixedly arranged on a first center shaft in a sleeving mode, and the driving gear is arranged on one side of the first center shaft and rotationally connected with the rack; the driving gear is meshed with the driven gear, and the barrel driving mechanism is in transmission connection with the driving gear; and a first box body which comprises the driven gear and the driving gear is arranged on the rack. The manufacturing and maintenance cost of the ball mill can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial powder preparation, in particular to an internal edge drive structure of an ultra-limit speed ball mill. Background Technique

[0002] A ball mill is a basic mechanical grinding equipment, which is widely used in industries such as metallurgy, building materials, and chemical industry, especially in the grinding production of metallurgical ore dressing and building materials cement. The main reasons for the wide application of ball mills are: first, excellent grinding performance, with powder particles being nearly spherical and reasonable particle size distribution; second, stable and reliable continuous operation; third, large single-machine production capacity.

[0003] Since when the rotational speed of the cylinder reaches or exceeds the limit (critical) speed, the grinding media and materials will remain relatively stationary with the cylinder and rotate together, resulting in a "wall attachment" motion state, which causes the materials and grinding media in the ball mill not to collide and impact with each other. Therefore, the rotational speed of the rotating cylinder of a traditional ball mill is lower than the limit (critical) speed (the rotational speed of the rotating cylinder is generally designed at 70-80% of the critical speed). Limited by the limit speed, in order to ensure the industrial production capacity scale of a single machine, a low-speed and high-torque drive device is a standard and typical feature of a traditional ball mill.

[0004] The low-speed and high-torque drive device of a traditional ball mill causes some inherent problems, such as the main drive device having disadvantages and drawbacks such as a large reduction ratio, a large and complex structure, low transmission efficiency, and high manufacturing cost.

[0005] In order to meet the requirements of low rotational speed and high torque of the cylinder of a traditional ball mill, the main drive of a traditional ball mill mainly uses edge drive. The main disadvantages of the edge drive of a traditional ball mill are: the drive device is large, the reduction ratio is large, the transmission efficiency is low, the lubrication effect of the open (last stage) drive is poor, it is easy to wear, and the installation requirements are high (the meshing accuracy of the large and small gear pairs depends on on-site installation and adjustment to ensure), the drive device occupies a large area, and the manufacturing cost is relatively high. The outer dimension of the large drive gear of a traditional edge drive ball mill far exceeds the outer diameter of the cylinder, and it is difficult to manufacture it as a closed drive due to manufacturing cost and transportation restrictions, and it can only be designed as an open drive; for example, the outer diameter of the large gear of a ball mill with a cylinder size of φ1.8m*7m exceeds φ3m, approaching twice the outer diameter of the cylinder.

[0006] With the progress of technology, it has become possible to improve the efficiency of a ball mill by improving the ball mill to break through the limit speed limit of the ball mill. Such as Figure 1As shown: The applicant has applied for a ball mill with central feeding and discharging in the cylinder body, with the application number CN2024108028206, including a frame 1 and a cylinder body 2. One end of the cylinder body 2 is provided with a feeding hollow shaft 21, and the other end is provided with a discharging hollow shaft 22. The cylinder body 2 is rotatably installed on the frame 1 so that the cylinder body 2 can rotate around its own axis; it also includes at least one impact mechanism 3 installed in the cylinder body 2 and arranged around the axis of the cylinder body 2 to revolve around the axis of the cylinder body 2 with the cylinder body 2. The impact mechanism 3 includes a planetary shaft 31. The planetary shaft 31 is arranged along the axis direction of the cylinder body 2. The planetary shaft 31 is rotatably connected to the cylinder body 2 so that the planetary shaft 31 can rotate around its own axis, that is, rotate self - sufficiently. An impact plate 33 for scraping the wall - attached materials in the cylinder body 2 is provided on the planetary shaft 31. In the figure, the planetary shaft 31 is driven by a fixed gear 4. The fixed gear 4 is arranged at one end of the cylinder body 2 and is coaxially arranged with the cylinder body 2. The fixed gear 4 is fixedly installed on the frame 1; one end of the planetary shaft 31 close to the fixed gear 4 extends out of the cylinder body 2 and is provided with a planetary gear 5 meshing with the fixed gear 4 to drive the planetary shaft 31 to rotate around its own axis. During the rotation of the cylinder body of this ball mill, while driving the planetary shaft 31 to rotate around the axis of the cylinder body 2, it realizes self - rotation around its own axis through the planetary gear 5 and the fixed gear 4. During the rotation of the planetary shaft 31, the impact plate 33 is driven to rotate together. During the rotation of the impact plate 33, the wall - attached materials and grinding bodies in the trajectory area of the impact plate 33 are scraped and impacted, and the wall - attached materials and grinding bodies in the nearby area are also impacted and removed, thereby eliminating the wall - attached materials, enabling the materials and grinding bodies to effectively impact inside the cylinder body 2, and realizing grinding under the condition of breaking through the critical speed.

[0007] When the ball mill is not restricted by the critical speed, the rotational speed of the cylinder body can be increased by several times or multiples without being restricted by the critical speed. Under the conditions of the same production capacity and the same transmission power, the reduction ratio of the main drive device of the mill is reduced by several times or multiples, the corresponding main drive torque is reduced by several times or multiples, the outer diameter of the corresponding main drive large gear can also be reduced by several times or multiples, and the outer diameter of the main drive large gear of the mill can be lower than or much lower than the outer diameter of the cylinder body. This creates favorable conditions for realizing a closed - type built - in drive. The closed - type built - in drive not only greatly reduces the volume, weight and manufacturing cost of the main drive device, but also brings many advantages such as excellent lubrication performance, high transmission accuracy and long service life. Utility Model Content

[0008] The technical problem to be solved by the present utility model is to provide an internal edge drive structure applicable to a ball mill with a super - critical speed, which is convenient for installation and maintenance.

[0009] The utility model solves the technical problem by adopting the following technical scheme: a built-in edge transmission structure of a super-limit speed ball mill, the ball mill comprising a frame, a cylinder, an impact drive mechanism, a driven gear, a driving gear and a cylinder drive mechanism; one end of the cylinder is provided with a first central axis coaxial with the cylinder and having an outer diameter smaller than the outer diameter of the cylinder, the other end is provided with a second central axis coaxial with the cylinder and having an outer diameter smaller than the outer diameter of the cylinder, the cylinder is rotatably connected with the frame through the first central axis and the second central axis, one end of the cylinder is provided with a feed hole, the other end is provided with a discharge hole, at least one impact mechanism arranged around the axis of the cylinder so as to be able to revolve around the axis of the cylinder with the cylinder is provided in the cylinder; the impact mechanism comprises a planetary shaft, the planetary shaft is arranged along the axis direction of the cylinder, the planetary shaft is rotatably connected with the cylinder so that the planetary shaft can rotate around its own axis, the planetary shaft is provided with an impact plate for scraping the wall-attached material in the cylinder, the impact drive mechanism is arranged at one end of the cylinder where the second central axis is arranged and connected with the planetary shaft;

[0010] The driven gear is sleeved and fixed on the first central shaft, the driving gear is arranged on one side of the first central shaft and is rotatably connected to the frame, the driving gear is meshed with the driven gear, and the cylinder driving mechanism is transmission-connected with the driving gear;

[0011] The frame is provided with a first box body including a driven gear and a driving gear.

[0012] Further, the first box body includes a first bottom ring plate, and a first outer ring plate and a first inner ring plate which are spaced apart and sleeved on the first central axis;

[0013] The first outer ring plate is located at a side of the first inner ring plate away from the cylinder, the first outer ring plate is fixed to the frame, the first central axis is rotatably connected to the frame through the first outer ring plate, the first inner ring plate is fixed to the first central axis and a distance is provided between the first inner ring plate and the cylinder, one end of the first bottom ring plate is fixed and sealed to the outer edge of the first outer ring plate, and the other end is rotatably and sealably matched to the outer edge of the first inner ring plate, thereby enclosing the first box body;

[0014] One end of the planetary shaft close to the first inner ring plate passes through the first through hole provided on the cylinder and then passes through the first inner ring plate. The planetary shaft is rotatably connected to the cylinder through the first inner ring plate, and a sealing structure is provided between the first through hole and the planetary shaft.

[0015] Further, the impact driving mechanism includes a fixed gear which is fixed on the frame and coaxially arranged with the cylinder body. The fixed gear is sleeved on the second central shaft, and one end of the planetary shaft close to the fixed gear passes through a second through hole provided on the cylinder body and meshes with the fixed gear through a planetary gear.

[0016] Further, a second inner ring plate sleeved on the second central shaft is provided on one side of the fixed gear close to the cylinder body, and a second outer ring plate sleeved on the second central shaft is provided on the other side;

[0017] A spacing is provided between the second inner ring plate and the cylinder body. The second inner ring plate is fixed on the second central shaft. One end of the planetary shaft close to the second inner ring plate passes through the second inner ring plate and is rotatably connected with the cylinder body through the second inner ring plate. A sealing structure is provided between the second through hole and the second central shaft;

[0018] The second outer ring plate is fixed on the frame, and the second central shaft is rotatably connected with the frame through the second outer ring plate;

[0019] A second bottom ring plate is provided between the second inner ring plate and the second outer ring plate. One end of the second bottom ring plate is fixedly and sealingly connected to the outer edge of the second inner ring plate, and the other end is rotatably and sealingly fitted with the outer edge of the second inner ring plate to enclose a second box body including the fixed gear and the planetary gear.

[0020] Further, the first central shaft is of a hollow structure, and the inner cavity of the first central shaft forms the feed hole. The second central shaft is hollowly arranged, and the inner cavity of the second central shaft forms the discharge hole.

[0021] Further, the first central shaft is of a hollow structure, and the inner cavity of the first central shaft forms the feed hole. The second central shaft is a solid shaft, and the discharge hole is arranged on the side wall at the other end of the cylinder body.

[0022] The beneficial effects of the present utility model are as follows: The traditional open-edge drive of the ball mill is transformed into the built-in closed drive of the present utility model, and the beneficial effects are at least as follows: First, the volume and weight of the main drive device are reduced by several times or even several times; Second, the manufacturing cost of the main drive device is reduced by several times or even several times; Third, the drive device can realize integrated factory manufacturing and installation, with high installation accuracy and transmission accuracy; Fourth, the built-in sealing and lubrication performance is excellent, the main drive has small wear, long service life, and simple maintenance. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the prior art;

[0024] Figure 2It is a schematic structural diagram of a ball mill with an internal edge drive structure;

[0025] Figure 3 It is a schematic structural diagram of a ball mill with an internal edge drive structure;

[0026] Figure 4 It is another schematic structural diagram of a ball mill with an internal edge drive structure;

[0027] As shown in the figure: frame 1, cylinder 2, impact mechanism 3, fixed gear 4, planetary gear 5, cylinder drive mechanism 6, driving gear 7, driven gear 8, seal 9, feed hole 11, discharge hole 12, first box body 13, second box body 14, first through hole 15, second through hole 16, feed hollow shaft 21, discharge hollow shaft 22, first central shaft 23, second central shaft 24, planetary shaft 31, impact plate 33, first inner ring plate 131, first outer ring plate 132, first bottom ring plate 133, second inner ring plate 141, second outer ring plate 142, second bottom ring plate 143. Specific implementation mode

[0028] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] Such as Figure 2As shown, the utility model is a built-in edge transmission structure of a super-limit speed ball mill, and the ball mill includes a frame 1, a cylinder 2, an impact drive mechanism, a driven gear 8, a driving gear 7 and a cylinder drive mechanism 6. One end of the cylinder 2 is provided with a first central axis 23 which is coaxial with the cylinder 2 and has an outer diameter smaller than the outer diameter of the cylinder 2, and the other end is provided with a second central axis 24 which is coaxial with the cylinder 2 and has an outer diameter smaller than the outer diameter of the cylinder 2. The cylinder 2 is rotatably connected to the frame 1 through the first central axis 23 and the second central axis 24. One end of the cylinder 2 is provided with a feed hole 11, and the other end is provided with a discharge hole 12. The cylinder 2 is provided with at least one impact mechanism 3 which is arranged around the axis of the cylinder 2 so as to be able to revolve around the axis of the cylinder 2 with the cylinder 2. The impact mechanism 3 includes a planetary shaft 31 which is arranged along the axis direction of the cylinder 2 and is rotatably connected with the cylinder 2 so that the planetary shaft 31 can rotate around its own axis. The planetary shaft 31 is provided with an impact plate 33 for scraping the wall-attached material in the cylinder. The impact drive mechanism is arranged at one end of the cylinder 2 where the second central axis 24 is arranged and connected to the planetary shaft 31. There are usually at least two impact mechanisms 3 which are evenly arranged around the axis of the cylinder 2. During the rotation of the cylinder, the ball mill drives the planetary shaft 31 to rotate around the axis of the cylinder 2, and at the same time drives the planetary shaft through the impact drive mechanism to realize self-rotation around its own axis. During the rotation of the planetary shaft 31, the impact plate 33 is driven to rotate together. During the rotation of the impact plate 33, the wall-attached materials and the grinding body in the track area of ​​the impact plate 33 are scraped and impacted, and the wall-attached materials and the grinding body in the nearby area are impacted and removed, thereby eliminating the wall-attached materials, so that the materials and the grinding body collide effectively in the cylinder 2, and the grinding is realized at a speed that exceeds the limit. After the ball mill is not limited by the limit speed, the cylinder speed can be increased several times without being limited by the limit speed. Under the same transmission power, the torque of the cylinder transmission device is also reduced several times, which can greatly reduce the volume and weight of the main transmission device, and the module and diameter of the driven gear can be greatly reduced, thereby creating conditions for changing the traditional transmission structure of the ball mill to overcome the problems of the traditional transmission structure. Therefore, in order to change the problem of the traditional transmission structure of the ball mill, in the utility model, the driven gear 8 is sleeved and fixed on the first central shaft 23, the driving gear 7 is arranged on one side of the first central shaft 23 and is rotatably connected to the frame 1, the driving gear 7 is meshed with the driven gear 8, the cylinder driving mechanism 6 is transmission-connected with the driving gear 7, and the frame 1 is provided with a first housing 13 including the driven gear 8 and the driving gear 7, so as to form an edge transmission structure of the super-limit speed ball mill in which the driven gear 8 and the driving gear 7 are built in the first housing. The utility model sleeves and fixes the driven gear 8 on the first central shaft 23, which is convenient for the driven gear 8 to reduce the diameter and modulus to meet the transmission requirements of the super-limit speed ball mill, and is convenient for the installation of the driven gear 8.After the driven gear 8 is mounted on the first central shaft 23, the first housing 13 is conveniently provided. The first housing 13 can protect and conveniently lubricate the transmission structures such as the driven gear 8 and the driving gear 7, thereby better ensuring the service life of the driven gear 8 and the driving gear 7.

[0030] The drum driving mechanism 6 usually adopts a motor.

[0031] The first housing can only protect the driven gear 8 and the driving gear 7. Figure 3 As shown, in the embodiment of the utility model, the first box body 13 includes a first bottom ring plate 133, and a first outer ring plate 132 and a first inner ring plate 131 which are sleeved on the first central shaft 23 at intervals; the first outer ring plate 132 is located on the side of the first inner ring plate 131 away from the cylinder 2, the first outer ring plate 132 is fixed to the frame 1, and the first central shaft 23 is rotatably connected to the frame 1 through the first outer ring plate 132; the first inner ring plate 131 is fixed to the first central shaft 23 and is provided with an interval between the first inner ring plate 131 and the cylinder 2 The first bottom ring plate 133 is fixed and sealed to the outer edge of the first outer ring plate 132 at one end, and the other end is rotated and sealed to the outer edge of the first inner ring plate 131 to enclose the first box body 13; the end of the planetary shaft 31 close to the first inner ring plate 131 passes through the first through hole 15 provided on the cylinder 2 and then is arranged in the first inner ring plate 131, and the planetary shaft 31 is rotatably connected to the cylinder 2 through the first inner ring plate 131, and a seal is provided between the first through hole 15 and the planetary shaft 31. The sealing cooperation can be achieved by a seal. In the embodiment of the utility model, the first outer ring plate 132 is fixed to the frame through the first bottom ring plate 133. The first outer ring plate 132 and the first bottom ring plate 133 can be fixedly connected by welding, bolting, etc., and a sealing ring can be used to achieve sealing between the two. Of course, the first outer ring plate 132 can also be an integral structure with the first bottom ring plate 133 to achieve fixed and sealed connection. The first inner ring plate 131 is fixed on the first central shaft 23, which can be realized by welding, bolt connection and the like. Of course, the first inner ring plate 131 can also be an integral structure with the first central shaft 23. The first central shaft 23 is rotatably connected to the frame 1 through the first outer ring plate 132, that is, the first central shaft 23 is rotatably connected to the frame 1 by being rotatably connected to the first outer ring plate 132. The first central shaft 23 and the first outer ring plate 132 can be connected by transmission through a rotating connection such as a bearing or a bushing. The planetary shaft 31 is rotatably connected to the cylinder 2 through the first inner ring plate 131, that is, the planetary shaft 31 is rotatably connected to the cylinder 2 by being rotatably connected to the first inner ring plate 131. The planetary shaft 31 and the first inner ring plate 131 can be connected by transmission through a rotating connection such as a bearing or a bushing.

[0032] In the above structure, the first central shaft 23 is rotatably connected to the frame 1 through the first outer ring plate 132, and one end of the planetary shaft 31 is rotatably connected to the cylinder body 2 through the first inner ring plate 131. In this way, the first box body formed by the first outer ring plate 132, the first inner ring plate 131 and the first bottom ring plate 133 can not only protect and facilitate the lubrication of the driven gear 8 and the driving gear 7, but also protect and facilitate the lubrication of the rotating connection components between the first central shaft 23 and the first outer ring plate 132, and between the planetary shaft 31 and the first inner ring plate 131. In addition, one end of the planetary shaft 31 is installed by passing through the first through hole 15 provided on the cylinder body 2 and then passing through the first inner ring plate 131 with a distance from the cylinder body 2, and is rotatably connected to the cylinder body 2 through the first inner ring plate 131. The rotating connection component of the planetary shaft is not arranged in the first through hole 15, which is convenient for arranging a sealing structure in the first through hole 15.

[0033] The impact driving mechanism can adopt a motor. In the present utility model, as Figure 4 shown, the impact driving mechanism includes a fixed gear 4, the fixed gear 4 is fixed on the frame 1 and is coaxially arranged with the cylinder body 2, the fixed gear 4 is sleeved on the second central shaft 24, and one end of the planetary shaft 31 close to the fixed gear 4 passes through the second through hole 16 provided on the cylinder body 2 and is meshed with the fixed gear 4 through a planetary gear 5. Since the fixed gear 4 is fixed on the frame 1, during the process of the planetary shaft 31 revolving around the axis of the cylinder body 2, the planetary gear 5 meshed with the fixed gear 4 will revolve and rotate around the fixed gear 4, so as to drive the planetary shaft 31 to rotate around its own axis while the cylinder body rotates. Among them, the fixed gear 4 can be an external gear and an internal gear. When the fixed gear 4 is an external gear, the planetary gear 5 is arranged outside the fixed gear 4 and is externally meshed with the fixed gear 4. During the rotation of the cylinder body, the planetary shaft 31 can rotate around its own axis in the same direction as the cylinder body (see Figure 4 ); when the fixed gear 4 is an internal gear, the planetary gear 5 is arranged inside the fixed gear 4 and is internally meshed with the fixed gear 4 (not shown). During the rotation of the cylinder body, the planetary shaft 31 can rotate around its own axis in the opposite direction to the cylinder body.

[0034] As Figure 3 and Figure 4As shown, in order to facilitate the protection and lubrication of the fixed gear 4 and the planetary gear, etc., in the utility model, the fixed gear 4 is provided with a second inner ring plate 141 sleeved on the second central shaft 24 on one side close to the cylinder 2, and a second outer ring plate 142 sleeved on the second central shaft 24 on the other side. There is a gap between the second inner ring plate 141 and the cylinder 2, the second inner ring plate 141 is fixed on the second central shaft 24, one end of the planetary shaft 31 close to the second inner ring plate 141 passes through the second inner ring plate 141 and is rotatably connected to the cylinder 2 through the second inner ring plate 141, and a sealing structure is provided between the second through hole 16 and the second central shaft 24. The second outer ring plate 142 is fixed on the frame 1, and the second central shaft 24 is rotatably connected to the frame 1 through the second outer ring plate 142. A second bottom ring plate 143 is provided between the second inner ring plate 141 and the second outer ring plate 142. One end of the second bottom ring plate 143 is fixed and sealed to the outer edge of the second inner ring plate 141, and the other end is rotated and sealed to the outer edge of the second inner ring plate 141 to enclose the second housing 14 including the fixed gear 4 and the planetary gear 5. The planetary shaft 31 is rotatably connected to the cylinder 2 through the second inner ring plate 141, that is, the planetary shaft 31 is rotatably connected to the cylinder 2 by being rotatably connected to the second inner ring plate 141. The planetary shaft 31 and the second inner ring plate 141 can be connected by a transmission through a rotating connection such as a bearing or a bushing. The second central shaft 24 is rotatably connected to the frame 1 through the second outer ring plate 142, that is, the second central shaft 24 is rotatably connected to the frame by being rotatably connected to the second outer ring plate 142. The second central shaft 24 and the second outer ring plate 142 can be connected by a transmission through a rotating connection such as a bearing or a bushing.

[0035] In the above structure, the second central shaft 24 is rotatably connected to the frame 1 through the second outer ring plate 142, and the other end of the planetary shaft 31 is rotatably connected to the cylinder 2 through the second inner ring plate 141. In this way, the second housing 14 surrounded by the second outer ring plate 142, the second inner ring plate 141 and the second bottom ring plate 143 can protect and facilitate lubrication of the fixed gear 4 and the planetary gear 5, and can also protect and facilitate lubrication of the rotating connection parts between the first central shaft 23 and the second outer ring plate 142 and between the planetary shaft 31 and the second inner ring plate 141. In addition, the planetary shaft 31 is installed in a manner of being rotatably connected to the cylinder 2 by passing through the second through hole 16 provided on the cylinder 2 and then being provided in the second inner ring plate 141 with a spacing therebetween, and being installed in a manner of being rotatably connected to the cylinder 2 through the second inner ring plate 141. The rotating connection part at the other end of the planetary shaft is not provided in the second through hole, so that it is convenient to provide a sealing structure in the second through hole 16.

[0036] The second outer ring plate 142 and the second bottom ring plate 143 can be fixedly connected by means such as welding and bolt connection, and a sealing ring can be used between them to achieve sealing. Of course, the second outer ring plate 142 and the second bottom ring plate 143 can also be an integral structure to achieve fixed and sealed connection. The second inner ring plate 141 is fixed on the first central shaft 23, and can be specifically achieved by means such as welding and bolt connection. Of course, the second inner ring plate 141 and the second central shaft 24 can also be an integral structure.

[0037] The first central shaft and the second central shaft can be a hollow structure or a solid structure, which is set according to needs. In an embodiment of the present invention, as Figure 2 shown, the first central shaft 23 is a hollow structure, and the inner cavity of the first central shaft 23 forms the feed hole 11. The second central shaft 24 is hollowly arranged, and the inner cavity of the second central shaft 24 forms the discharge hole 12. That is, the first central shaft 23 forms the feed hollow shaft 21, and the second central shaft 24 forms the discharge hollow shaft 22. The ball mill adopts a structure of central feeding and central discharging. Of course, it is also possible that the first central shaft 23 is a hollow structure, the inner cavity of the first central shaft 23 forms the discharge hole 12, the second central shaft 24 is hollowly arranged, and the inner cavity of the second central shaft 24 forms the feed hole 11.

[0038] In an embodiment of the present invention, as Figure 4 shown, the first central shaft 23 is a hollow structure, the inner cavity of the first central shaft 23 forms the feed hole 11, the second central shaft 24 is a solid shaft, and the discharge hole 12 is arranged on the side wall of the other end of the cylinder body 2. That is, the ball mill adopts a structure of central feeding and edge discharging. Of course, in some embodiments, the second central shaft 24 is a hollow structure, the inner cavity of the second central shaft 24 forms the feed hole 11, the first central shaft 23 is a solid shaft, and the discharge hole 12 is arranged on the side wall of the other end of the cylinder body 2.

Claims

1. A built-in edge transmission structure of a super-limit speed ball mill, the ball mill comprising a frame (1), a barrel (2), an impact drive mechanism, a driven gear (8), a driving gear (7) and a barrel drive mechanism (6); one end of the barrel (2) is provided with a first central shaft (23) coaxial with the barrel (2) and having an outer diameter smaller than the outer diameter of the barrel (2), and the other end is provided with a second central shaft (24) coaxial with the barrel (2) and having an outer diameter smaller than the outer diameter of the barrel (2); the barrel (2) is rotatably connected to the frame (1) via the first central shaft (23) and the second central shaft (24); one end of the barrel (2) is provided with a feed hole (11) and the other end is provided with a discharge hole (12); The cylinder (2) is provided with at least one impact mechanism (3) arranged around the axis of the cylinder (2) so as to be able to revolve around the axis of the cylinder (2) with the cylinder (2); the impact mechanism (3) comprises a planetary shaft (31), the planetary shaft (31) is arranged along the axis of the cylinder (2), the planetary shaft (31) is rotatably connected with the cylinder (2) so that the planetary shaft (31) can rotate around its own axis, the planetary shaft (31) is provided with an impact plate (33) for scraping the wall-attached material in the cylinder, the impact drive mechanism is arranged at one end of the cylinder (2) where the second central shaft (24) is arranged and is connected to the planetary shaft (31), and is characterized in that: The driven gear (8) is sleeved and fixed on the first central shaft (23), the driving gear (7) is arranged on one side of the first central shaft (23) and is rotatably connected to the frame (1), the driving gear (7) is meshed with the driven gear (8), and the cylinder driving mechanism (6) is drivingly connected to the driving gear (7); The frame (1) is provided with a first box body (13) including the driven gear (8) and the driving gear (7).

2. The built-in edge transmission structure of a super-limiting speed ball mill according to claim 1, characterized in that: The first box body (13) comprises a first bottom ring plate (133), and a first outer ring plate (132) and a first inner ring plate (131) which are spaced apart and sleeved on the first central axis (23); The first outer ring plate (132) is located on a side of the first inner ring plate (131) away from the cylinder (2); the first outer ring plate (132) is fixed on the frame (1); the first central shaft (23) is rotatably connected to the frame (1) via the first outer ring plate (132); the first inner ring plate (131) is fixed on the first central shaft (23) and a distance is provided between the first inner ring plate (131) and the cylinder (2); one end of the first bottom ring plate (133) is fixed to and sealed with the outer edge of the first outer ring plate (132); the other end is rotatably matched with the outer edge of the first inner ring plate (131) to enclose the first box (13); One end of the planetary shaft (31) close to the first inner ring plate (131) passes through a first through hole (15) provided on the cylinder (2) and then passes through the first inner ring plate (131); the planetary shaft (31) is rotatably connected to the cylinder (2) via the first inner ring plate (131); and a sealing structure is provided between the first through hole (15) and the planetary shaft (31).

3. The built-in edge transmission structure of a super-limiting speed ball mill according to claim 1 or 2, characterized in that: The impact drive mechanism comprises a fixed gear (4), the fixed gear (4) being fixed on the frame (1) and being coaxially arranged with the cylinder (2), the fixed gear (4) being sleeved on the second central axis (24), and the end of the planetary shaft (31) close to the fixed gear (4) passing through a second through hole (16) arranged on the cylinder (2) and then meshing with the fixed gear (4) through a planetary gear (5).

4. The built-in edge transmission structure of a super-limiting speed ball mill according to claim 3, characterized in that: A second inner ring plate (141) sleeved on the second central shaft (24) is provided on one side of the fixed gear (4) close to the cylinder (2), and a second outer ring plate (142) sleeved on the second central shaft (24) is provided on the other side; A spacing is provided between the second inner ring plate (141) and the cylinder (2); the second inner ring plate (141) is fixed on the second central shaft (24); one end of the planetary shaft (31) close to the second inner ring plate (141) passes through the second inner ring plate (141) and is rotatably connected to the cylinder (2) through the second inner ring plate (141); and a sealing structure is provided between the second through hole (16) and the second central shaft (24); The second outer ring plate (142) is fixed on the frame (1), and the second central shaft (24) is rotatably connected to the frame (1) via the second outer ring plate (142); A second bottom ring plate (143) is provided between the second inner ring plate (141) and the second outer ring plate (142); one end of the second bottom ring plate (143) is fixedly connected to the outer edge of the second inner ring plate (141) and hermetically connected, and the other end of the second bottom ring plate (143) is rotatably and hermetically matched with the outer edge of the second inner ring plate (141) to enclose a second housing (14) including the fixed gear (4) and the planetary gear (5).

5. The built-in edge transmission structure of a super-limiting speed ball mill according to claim 1, characterized in that: The first central shaft (23) is a hollow structure, and the inner cavity of the first central shaft (23) forms the feed hole (11); the second central shaft (24) is hollow, and the inner cavity of the second central shaft (24) forms the discharge hole (12).

6. The built-in edge transmission structure of a super-limiting speed ball mill according to claim 1, characterized in that: The first central shaft (23) is a hollow structure, the inner cavity of the first central shaft (23) forms the feed hole (11), the second central shaft (24) is a solid shaft, and the discharge hole (12) is arranged on the side wall of the other end of the cylinder (2).

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