A shoe bearing for a large shoe ball mill

Abstract

The application provides a sliding shoe bearing for a large sliding shoe ball mill, and belongs to the technical field of sliding shoe ball mills, which comprises a barrel sliding ring and a sliding shoe bearing bottom plate, a supporting tile base is installed on the sliding shoe bearing bottom plate, two groups of fixed supporting tile assemblies and two groups of movable supporting tile assemblies for supporting the barrel sliding ring are arranged on the supporting tile base, the movable supporting tile assembly comprises an annular hydraulic cylinder, a rigid support disc, a convex ball one and a supporting tile body one, the rigid support disc is arranged on the piston rod of the annular hydraulic cylinder, the convex ball one is installed on the rigid support disc, the convex ball one is arranged as a plunger type bearing head, the top of the rigid support disc is matched with the convex ball one, and the supporting tile body one is installed on the top of the convex ball one. The application can provide more stable and uniform supporting force for the barrel sliding ring through the cooperation of the two groups of fixed supporting tile assemblies and the two groups of movable supporting tile assemblies.

Description

Technical Field

[0001] This invention relates to the field of sliding ball mill technology, and more specifically to a sliding bearing for large sliding ball mills. Background Technology

[0002] Sliding shoe ball mills are a common type of grinding equipment used for dry or wet crushing and grinding of various ores, primarily in the production processes of mining, building materials, and metallurgy. Compared to ball mills supported by main bearings, sliding shoe ball mills eliminate the large end caps at both ends of the grinding head, directly supporting the sliding shoe bearings at both ends of the cylinder. This shortens the distance between the two support points of the cylinder, reduces cylinder flexibility, and allows for a thinner cylinder, resulting in a lighter mill. Therefore, an increasing number of large ball mills are adopting the sliding shoe bearing support structure. With the increasing size of ball mills, the diameter of the sliding shoe on the cylinder can reach over 7 meters.

[0003] In most existing sliding shoe bearing structures, one or two bearing pads are used to support the cylinder slip ring. However, this support method has certain limitations in the operation of large sliding shoe ball mills. During the long-term operation of the ball mill, due to the uneven distribution of materials inside the cylinder and the dynamic changes of the cylinder, it is difficult for a single or two bearing pads to adaptively adjust the supporting force on the cylinder slip ring. This makes the contact state between the bearing pad and the cylinder slip ring unstable, which in turn easily affects the uniformity of the hydrostatic oil film thickness between the bearing pad and the cylinder slip ring, and easily causes wear between the bearing pad and the cylinder slip ring, affecting the service life of the ball mill.

[0004] Referring to Chinese patent document CN221386697U, entitled "A Sliding Bearing Support Device for a Ball Mill," the device includes a sliding bearing support device, a bearing pad, a sliding base, and a drum. The sliding bearing support device and the bearing pad are configured as a set, with the bearing pad contacting a slip ring on the surface of the drum. The lower end of the sliding bearing support device is mounted on the sliding base. The sliding bearing support device includes a steel pipe, adjusting bolts, a support steel plate, and a rubber plate. Adjusting bolts are rotatably connected to the lower surfaces of the left and right ends of the support steel plate. A rubber plate is mounted on the top of the support steel plate. An end plate is mounted on the upper end of the steel pipe, with a nut at the center of the end plate. The adjusting bolts are threadedly connected to the nut. A base plate is mounted on the lower end of the steel pipe and is fixed to the sliding base. In use, the sliding bearing support device can adjust the angle and position of the bearing pad according to the different forces applied to it, better adapting to the deformation of the drum during operation. However, when the slip ring on the roller applies localized pressure to the bearing due to uneven gravity, the elastic deformation of the rubber plate is limited, and the thickness of the hydrostatic oil film between the slip ring and the bearing is prone to unevenness, which in turn can easily lead to localized wear between the slip ring and the bearing.

[0005] Referring to the above technical solutions, existing technologies have improved the support structure of sliding bearings to some extent. However, during the operation of a sliding ball mill, the uneven force distribution between the bearing pad and the cylinder slip ring causes unstable hydrostatic oil film thickness, resulting in significant wear between the bearing pad and the cylinder slip ring, thus affecting the service life of the ball mill. Therefore, a new type of sliding bearing for large sliding ball mills is needed to solve the problems existing in the current technology. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a sliding bearing for a large sliding ball mill, so as to adjust the uniformity of force between the bearing assembly and the cylinder slip ring, form a relatively stable hydrostatic oil film, reduce the friction between the bearing assembly and the cylinder slip ring, and reduce the degree of wear.

[0007] To address the aforementioned technical problems, this invention provides a sliding bearing for a large sliding ball mill, comprising a cylindrical slip ring and a sliding bearing base plate. A bearing pad base is mounted on the sliding bearing base plate, and bearing pad assemblies for supporting the cylindrical slip ring are provided on the bearing pad base. The bearing pad assemblies include two sets of fixed bearing pad assemblies and two sets of movable bearing pad assemblies, with the two sets of movable bearing pad assemblies located between the two sets of fixed bearing pad assemblies. The bearing pad assemblies are arrayed along the support surface of the bearing pad base. The movable bearing pad assembly includes an annular hydraulic cylinder, a rigid support plate, a convex ball, and a bearing pad body. The rigid support plate is mounted on the piston rod of the annular hydraulic cylinder, and the convex ball is mounted on the rigid support plate. The convex ball is configured as a plunger-type bearing head, and the top of the rigid support plate is adapted to the convex ball. The bearing pad body is mounted on the top of the convex ball.

[0008] By adopting the above technical solution, an annular locking plate is provided on the side wall of the annular hydraulic cylinder, and the outer side wall of the rigid support plate is set to be circular, with the diameter of the outer side wall of the annular locking plate being the same as the diameter of the outer side wall of the rigid support plate.

[0009] By adopting the above technical solution, an adjusting bolt is provided between the annular locking plate and the rigid support plate, and two locking nuts are installed on the adjusting bolt. The two locking nuts are located at the top and bottom of the annular locking plate, respectively.

[0010] By adopting the above technical solution, the fixed support assembly consists of a concave sphere, a second convex sphere, and a second support body. The concave sphere is fixed to the support base by bolts, the second convex sphere is installed on the concave sphere, and the second support body is provided on the second convex sphere for supporting the cylinder slip ring.

[0011] By adopting the above technical solution, water cavities are provided on both the first and second bodies of the towa, and the water cavities are connected by water pipes. A cooling water inlet is provided on the towa base, and the cooling water inlet is connected to the water pipe.

[0012] By adopting the above technical solution, both the first and second bodies of the Towa body are provided with oil chamber 1 and oil chamber 2. The oil chambers 1 are connected to each other through a main oil pipe. Multiple oil distribution pipes are provided on the main oil pipe. Each oil distribution pipe is connected to a single oil chamber 2. A high-pressure oil port is provided on the oil chamber 2. The oil outlet of the oil chamber 2 is connected to the top of the first and second bodies of the Towa body.

[0013] By adopting the above technical solution, a protective cover for protecting the cylinder slip ring is connected to the upper part of the base.

[0014] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects: 1. This invention uses two sets of fixed support pad assemblies and two sets of movable support pad assemblies. By reasonably setting the number and arrangement of the support pad assemblies, during the long-term operation of the ball mill, the annular hydraulic cylinder in the movable support pad assembly can flexibly adjust the height and support force of the support pad body according to the force condition of the cylinder slip ring, thus balancing the force on the cylinder slip ring. This solves the problem that the support pads are difficult to adaptively adjust the support force in the prior art. Multiple support pad assemblies can work together to better adapt to the force changes of the cylinder slip ring. Compared with traditional technical solutions, this invention can solve the problem of unstable local contact state when supported by a single or two support pads.

[0015] 2. This invention, through the cooperation of annular locking plate, adjusting bolt, and locking nut, allows the first bearing body in the movable bearing assembly to be positioned at a certain elevation, which, in conjunction with the elevation position of the second bearing body in the fixed bearing assembly, can stably and evenly distribute the force on the cylinder slip ring. This enables the first and second bearing bodies to form a stable hydrostatic oil film between themselves and the cylinder slip ring, reducing the friction and wear between the bearing assembly and the cylinder slip ring, and improving the stability and service life of the slip bearing.

[0016] 3. In this invention, both sets of fixed support components and two sets of movable support components are bolted to the support base, which is designed to be detachable. If any fixed support component or movable support component is damaged, it can be easily disassembled and replaced, reducing maintenance costs and difficulty. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a sliding bearing for a large sliding ball mill according to the present invention; Figure 2 This is a side sectional view of the fixed bracket assembly of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the active Towa component of the present invention; Figure 4 This is a cross-sectional view of the active torsion bracket assembly of the present invention; Figure 5This is an internal cross-sectional view of the second oil chamber and the high-pressure oil port of the present invention; Figure 6 This is a schematic diagram of the cooling component and oil delivery component of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Slipper bearing base plate; 11. Pad base; 12. Protective cover; 2. Movable pad assembly; 21. Annular hydraulic cylinder; 22. Rigid support plate; 23. Annular locking plate; 24. Convex ball one; 25. Pad body one; 26. Adjusting bolt; 27. Locking nut; 28. Piston rod; 3. Fixed pad assembly; 31. Concave ball; 32. Convex ball two; 33. Pad body two; 4. Cooling assembly; 41. Water chamber; 42. Water pipe; 43. Cooling water inlet; 5. Oil supply assembly; 51. Oil chamber one; 52. Oil chamber two; 53. Main oil pipe; 54. Oil distributor pipe; 55. High-pressure oil port; 6. Cylinder slip ring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the embodiments of the present invention. Figures 1-6 The technical solutions of the embodiments of the present invention will be clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0020] Reference Figure 1 and Figure 6 This embodiment provides a sliding bearing for a large sliding ball mill, including a cylindrical slip ring 6, a sliding bearing base plate 1, a fixed bearing pad assembly 3, a movable bearing pad assembly 2, a cooling assembly 4, and an oil supply assembly 5. The cylindrical slip ring 6 is mounted on the fixed bearing pad assembly 3 and the movable bearing pad assembly 2. The sliding bearing base plate 1 is equipped with a bearing pad base 11 and a protective cover 12. The protective cover 12 is used to protect the cylindrical slip ring 6. The fixed bearing pad assembly 3 and the movable bearing pad assembly 2 are mounted on the bearing pad base 11. The fixed bearing pad assembly 3 and the movable bearing pad assembly 2 can provide stable force support for the cylindrical slip ring 6. The cooling assembly 4 and the oil supply assembly 5 are connected between the fixed bearing pad assembly 3 and the movable bearing pad assembly 2.

[0021] The inner support surface of the support base 11 is set in an arc shape. The support base 11 adopts an integral flat base structure, which is welded from thick steel plates. There are two sets of fixed support components 3 and movable support components 2. The fixed support components 3 are located on both sides, and the movable support components 2 are located between the two fixed support components 3. The two sets of fixed support components 3 and the two sets of movable support components 2 are distributed along the arc support surface of the support base 11. The included angle between the center lines of two adjacent support components is 36 degrees. The included angle between the center line of two adjacent movable support components 2 and the center vertical line of the support base 11 is 18 degrees. The included angle between the center lines of the two outermost fixed support components is 108 degrees. By reasonably setting the number and arrangement of the support components, the stability of the support components for the cylinder slip ring 6 is enhanced.

[0022] Example 1: Refer to Figure 2 , Figure 3 and Figure 4 The movable support pad assembly 2 includes an annular hydraulic cylinder 21, a rigid support plate 22, a convex ball 24, and a support pad body 25. The annular hydraulic cylinder 21 is bolted to the support pad base 11 and is designed for detachable installation, allowing for easy disassembly of the entire movable support pad assembly 2 by operators. The piston rod 28 is assembled inside the annular hydraulic cylinder 21. The rigid support plate 22 is mounted on the piston rod 28 of the annular hydraulic cylinder 21, and the convex ball 24 is mounted on the rigid support plate 22. The convex ball 24 is configured as a plunger-type bearing head. The top of the rigid support plate 22 is configured with a concave surface that matches the convex surface at the bottom of the convex ball 24. The top of the convex ball 24 is configured as a flat surface, and the support pad body 25 is mounted on the top of the convex ball 24.

[0023] During operation, the annular hydraulic cylinder 21 injects hydraulic oil to push the piston rod 28, rigid support plate 22, convex ball 24, and bearing body 25 upward or downward. When the cylinder slip ring 6 is subjected to a large radial force, the annular hydraulic cylinder 21 increases the amount of hydraulic oil injected, causing the bearing body 25 to move upward and enhance the support force on the cylinder slip ring 6. When the cylinder slip ring 6 is subjected to a small force, the annular hydraulic cylinder 21 discharges some hydraulic oil, lowering the height of the bearing body 25 and reducing unnecessary friction and wear. This flexible and dynamic adjustment method can effectively balance the force on the cylinder slip ring 6 and improve the overall stability of the slip bearing.

[0024] Example 2: Refer to Figure 3The movable support plate assembly 2 also includes an annular locking plate 23, adjusting bolts 26, and locking nuts 27. An annular locking plate 23 is provided on the side wall of the annular hydraulic cylinder 21. The outer side wall of the rigid support plate 22 is circular, and the diameter of the outer side wall of the annular locking plate 23 is the same as the diameter of the outer side wall of the rigid support plate 22. Four through holes are arranged in a circumferential array on the rigid support plate 22, and four threaded holes are arranged in a circumferential array on the annular locking plate 23. The through holes and threaded holes are coaxially arranged, and adjusting bolts 26 are provided on the through holes and threaded holes. Two locking nuts 27 are installed on the adjusting bolts 26, located at the top and bottom of the annular locking plate 23, respectively. By rotating the adjusting bolts 26 and adjusting the positions of the two locking nuts 27, the support plate body 25 can be positioned at a specific elevation. The two locking nuts 27 also enhance the locking effect between the adjusting bolts 26 and the annular locking plate 23.

[0025] In use, after the rigid support plate 22, the annular locking plate 23, the convex ball 24, and the bearing body 25 rise to the expected position under the action of the annular hydraulic cylinder 21, the operator can install adjusting bolts 26 and locking nuts 27 on the rigid support plate 22 and the annular locking plate 23 to fix the position between the rigid support plate 22 and the annular locking plate 23. Then, the hydraulic oil in the annular hydraulic cylinder 21 is depressurized, and the piston rod 28 and its upper part are changed from being supported by hydraulic pressure to being supported by adjusting bolts 26 and locking nuts 27, so as to realize the elevation adjustment of the bearing body 25 and ensure that the two movable bearing bodies 25 fully support the cylinder. By depressurizing the hydraulic oil, leakage of hydraulic oil after being under pressure for a long time can be prevented, thereby reducing the problem of decreased support force.

[0026] During the fixed-distance support process, the two movable support bodies 25 and the two sets of fixed support components 3 work together to provide a stable and uniform support force for the cylinder slip ring 6. Because it has been adjusted in elevation, it can effectively distribute the force when the cylinder slip ring 6 is running.

[0027] Reference Figure 2 The fixed support assembly 3 includes a concave sphere 31, a second convex sphere 32, and a second support body 33. The concave sphere 31 is fixed to the support base 11 by bolts. The second convex sphere 32 is installed on the concave sphere 31. The second support body 33 for supporting the cylinder slip ring 6 is provided on the second convex sphere 32. After the fixed support assembly is processed and installed on the support base, the elevation of the first support body 25 is fixed and cannot be adjusted. The lower part of the second support body 33 is connected to the second convex sphere 32 by a double-ended stud. The second convex sphere 32 and the lower concave sphere 31 form a spherical contact structure, which ensures stable contact between the cylinder slip ring 6 and the first support body 25 and the second support body 33 under heavy load conditions, and can alleviate vibration.

[0028] Reference Figure 6The cooling assembly 4 includes a water cavity 41, a water pipe 42, and a cooling water inlet 43. Both the first trolley body 25 and the second trolley body 33 have water cavities 41, which are connected by the water pipe 42. The trolley base 11 has a cooling water inlet 43, which is connected to the water pipe 42 and to an external cooling water source. Cooling circulating water is injected through the water pipe 42 and the water cavity 41, effectively reducing the heat generated by the first trolley body 25 and the second trolley body 33 during operation, thus cooling them and extending their service life.

[0029] Reference Figure 3 and Figure 5 The oil delivery assembly 5 includes an oil chamber 1 51, an oil chamber 2 52, an oil main pipe 53, an oil distribution pipe 54, and a high-pressure oil port 55. Both the first trolley body 25 and the second trolley body 33 have oil chambers 1 51 and 2 52. The oil chambers 1 51 are connected to each other via the oil main pipe 53, which is connected to an external oil source. Multiple oil distribution pipes 54 are installed on the oil main pipe 53, and each oil distribution pipe 54 is connected to an oil chamber 2 52. Each oil distribution pipe 54 corresponds to a single oil chamber 2 52. A high-pressure oil port 55 is installed on each oil chamber 2 52, and the oil chamber 2 52 is connected to the inner top wall of both the first trolley body 25 and the second trolley body 33.

[0030] High-pressure oil port 55 sequentially delivers oil from oil main pipe 53 and oil branch pipe 54 to the interior of oil chamber 2 52. The high-pressure oil inside oil chamber 2 52 is then transferred to the contact surfaces between the inner walls of the top of the first and second 33 of the slip ring and the cylinder. During operation of the slip mill, the pressurization inside oil chamber 2 52 causes an oil film to flow to the top of the first and second 33 of the slip ring, forming a hydrostatic oil film that lubricates the cylinder slip ring 6. This effectively reduces friction between the two, lowers wear, and ensures the smooth operation of the slip bearing.

[0031] When using this device, the first method of use is as follows: First, install two sets of fixed support pad assemblies 3 and two sets of movable support pad assemblies 2. At this time, do not install the adjusting bolts 26 and locking nuts 27 on the movable support pad assemblies 2. During the operation of this device, the annular hydraulic cylinder 21 on the movable support pad assembly 2 can flexibly adjust the height of the rigid support plate 22, the convex ball 24 and the support pad body 25 by injecting or discharging hydraulic oil. When the cylinder slip ring 6 is subjected to uneven force, the support force of the support pad body 25 on the cylinder slip ring 6 is adaptively adjusted to balance the force on the cylinder slip ring 6.

[0032] Cooling water enters through cooling water inlet 43 and flows through water pipe 42 into water chamber 41 on the first jack body 25 and the second jack body 33. It circulates continuously in water chamber 41, carrying away the heat generated during the operation of the jack body and effectively reducing the temperature of the jack body. The oil delivery assembly 5 can deliver oil sequentially from the oil main pipe 53 and the oil branch pipe 54 to the inside of the second oil chamber 52, forming a static pressure oil film on the contact surface between the inner side wall of the top of the first jack body 25 and the second jack body 33 and the cylinder slip ring 6, reducing the friction and wear between the jack body and the cylinder slip ring 6.

[0033] The second method of use: Install two sets of fixed support pad assemblies 3 and two sets of movable support pad assemblies 2. Before the device is operated, first inject hydraulic oil into the annular hydraulic cylinder 21. Under the action of the hydraulic oil, the rigid support plate 22, the convex ball 24 and the support pad body 25 are driven to rise to a certain height, which matches the height of the support pad body 23 on the fixed support pad assembly 3. Then, install the adjusting bolt 26 and the locking nut 27 on the through hole of the rigid support plate 22 and the threaded hole of the annular locking plate 23. Finally, depressurize the hydraulic oil in the annular hydraulic cylinder 21, so that the piston rod 28 and the part above it are supported by the adjusting bolt 26 and the locking nut 27, thus completing the elevation adjustment of the support pad body 25.

[0034] In this configuration, the movable bearing assembly 2 and the fixed bearing assembly 3 work together to provide stable and uniform support for the cylinder slip ring 6. Because the bearing body 25 has been height-adjusted, it effectively distributes the force during cylinder slip ring 6 operation, forming a stable hydrostatic oil film, reducing friction and wear. Simultaneously, the cooling assembly 4 continuously cools the bearing, and the oil supply assembly 5 continuously supplies high-pressure oil to the contact surface between the bearing and the cylinder slip ring 6, ensuring the normal operation of the sliding bearing. By depressurizing the hydraulic oil, leakage after prolonged pressure can be prevented, thus avoiding a decrease in support force. It also reduces wear on the annular hydraulic cylinder 21 under long-term high-pressure loads, extending its service life. Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A sliding bearing for a large sliding ball mill, comprising a cylindrical slip ring and a sliding bearing base plate, characterized in that: A bearing base is installed on the slip bearing base plate. A bearing assembly for supporting the cylinder slip ring is provided on the bearing base. The bearing assembly includes two sets of fixed bearing assemblies and two sets of movable bearing assemblies. The two sets of movable bearing assemblies are located between the two sets of fixed bearing assemblies. The bearing assemblies are distributed in an array along the support surface of the bearing base. The movable bearing assembly includes an annular hydraulic cylinder, a rigid support plate, a convex ball, and a bearing body. The piston rod of the annular hydraulic cylinder is provided with a rigid support plate, and the convex ball is installed on the rigid support plate. The convex ball is configured as a plunger-type bearing head. The top of the rigid support plate is adapted to the convex ball, and the bearing body is installed on the top of the convex ball.

2. The sliding bearing for a large sliding ball mill according to claim 1, characterized in that: The annular hydraulic cylinder has an annular locking plate on its side wall, and the outer side wall of the rigid support plate is circular. The diameter of the outer side wall of the annular locking plate is the same as the diameter of the outer side wall of the rigid support plate.

3. The sliding bearing for a large sliding ball mill according to claim 2, characterized in that: An adjusting bolt is provided between the annular locking plate and the rigid support plate, and two locking nuts are installed on the adjusting bolt. The two locking nuts are located at the top and bottom of the annular locking plate, respectively.

4. The sliding bearing for a large sliding ball mill according to claim 1, characterized in that: The fixed support assembly includes a concave sphere, a second convex sphere, and a second support body. The concave sphere is fixed to the support base by bolts. The second convex sphere is installed on the concave sphere, and the second support body is provided on the second convex sphere for supporting the cylinder slip ring.

5. The sliding bearing for a large sliding ball mill according to claim 4, characterized in that: Both the first and second bodies of the towa are provided with water cavities, which are connected by water pipes. The towa base is provided with a cooling water inlet, which is connected to the water pipes.

6. The sliding bearing for a large sliding ball mill according to claim 5, characterized in that: Both the first and second bodies of the Towa are provided with an oil cavity and an oil cavity. The oil cavities are connected to each other through a main oil pipe. Multiple oil branch pipes are provided on the main oil pipe. Each oil branch pipe is connected to a single oil cavity. Each oil cavity is provided with a high-pressure oil port. The oil outlet of the oil cavity is connected to the top of the first and second bodies of the Towa.

7. The sliding bearing for a large sliding ball mill according to claim 1, characterized in that: The upper part of the base of the tube is connected to a protective cover for protecting the slip ring of the cylinder.

Images