A high wear lining assembly for a mill device

Abstract

The utility model provides a kind of high wear-resistant lining plate assembly of flour mill device belongs to flour mill mechanical technical field, the high wear-resistant lining plate assembly of this flour mill device is used to install in the inner wall of flour mill barrel, the lining plate assembly includes lining plate body, several wear-resistant bosses and connecting portion, the lining plate body is arc plate structure, the inner concave surface of the lining plate body is working surface, the outer convex surface of the lining plate body is mounting surface, the several wear-resistant bosses are array distribution along the working surface of the lining plate body, the connecting portion is arranged on the mounting surface of the lining plate body, the connecting portion is fixedly connected with the inner wall of flour mill barrel by bolt, the wear-resistant boss is formed from the working surface of the lining plate body to inboard protrusion, the utility model can solve the technical problem that material particle is embedded in gap place and is easy to cause stress concentration and crack when using existing flour mill lining plate.

Description

Technical Field

[0001] This utility model belongs to the field of grinding mill mechanical technology, and specifically relates to a high wear-resistant liner assembly for a grinding mill device. Background Technology

[0002] Grinding mills are widely used material crushing equipment in industrial production, mainly for grinding hard materials such as ores, cement clinker, chemical raw materials, and building materials. During the operation of a grinding mill, the liner assembly on the inner wall of the cylinder directly bears the high-speed impact, intense friction, and extrusion of the material, resulting in an extremely harsh working environment. Current grinding mill liners typically employ a flat plate structure or welded wear-resistant blocks to the surface of the flat plate to improve wear resistance. However, flat plate liners, due to their smooth surface and lack of effective material guidance and grinding structures, cause the impact force generated by the material on the liner surface to act directly on the plane, resulting in large-area impact pits and wear depressions on the liner surface, leading to rapid liner wear. While liners with welded wear-resistant blocks may have better wear resistance, the latter... While the components exhibit good wear resistance, the welded joints suffer from abrupt changes in material properties and residual stress. Under repeated impact loads, fatigue cracks easily develop at the welds, and the wear-resistant blocks, once detached, actually accelerate the wear of the liner itself. Another technical solution involves mechanically embedding hard alloy blocks into the liner, but the embedding structure has a fitting gap. When material particles enter the gap, a wedging effect occurs, causing the inserts to loosen or even detach. All these existing technical solutions suffer from short liner service life, frequent maintenance, and high replacement costs. To address the shortcomings of these existing technologies, the industry urgently needs a mill liner assembly with a reliable structure, excellent wear resistance, and long service life to meet the requirements of continuous and stable operation of modern production equipment. Utility Model Content

[0003] In view of this, the present invention provides a high wear-resistant liner assembly for a grinding mill device, which can solve the technical problem that existing grinding mill liners are prone to stress concentration and cracking when material particles are embedded in the gaps during use.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a high wear-resistant liner assembly for a grinding mill device, used for installation on the inner wall of the grinding mill cylinder. The liner assembly includes a liner body, a plurality of wear-resistant bosses, and a connecting part. The liner body has an arc-shaped plate structure, with the concave surface of the liner body serving as the working surface and the convex surface of the liner body serving as the mounting surface. The plurality of wear-resistant bosses are arranged in an array along the working surface of the liner body. The connecting part is disposed on the mounting surface of the liner body and is fixedly connected to the inner wall of the grinding mill cylinder by bolts. The wear-resistant bosses protrude inward from the working surface of the liner body and are integrally formed with the liner body. The cross-sectional shape of the wear-resistant bosses gradually tapers from the base to the top.

[0006] The technical effects of the high wear-resistant liner assembly for a grinding mill provided by this utility model are as follows: By setting wear-resistant bosses integrally formed with the working surface of the liner body and with a gradually shrinking cross-section, when the material collides and rubs against the wear-resistant boss during the grinding process, the shrinking structure of the boss can guide the material to move downward along the side wall of the boss, avoiding the accumulation of material on the top of the boss. At the same time, the integrally formed structure eliminates the joint gap between the boss and the liner body, preventing the material from embedding into the gap and causing local stress concentration and cracking of the liner. This significantly improves the overall wear resistance and service life of the liner assembly, ensuring the stable operation of the grinding mill under long-term high-intensity working conditions.

[0007] Based on the above technical solution, the high wear-resistant liner assembly of the grinding mill device of this utility model can be further improved as follows:

[0008] The wear-resistant boss is shaped like a truncated cone, the base of the wear-resistant boss is connected to the working surface of the liner body, and the top of the wear-resistant boss is a planar structure.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by designing the wear-resistant boss as a truncated cone shape with a flat top, the contact area during material impact is moderate, which ensures that the boss has sufficient strength to withstand impact loads and is not easy to break, while avoiding stress concentration caused by an overly sharp top. At the same time, the flat top can effectively grind the material, improving grinding efficiency. Furthermore, the truncated cone's inclined structure facilitates material flow between the bosses, reducing the material's residence time on the liner surface.

[0010] Furthermore, the liner body has side reinforcements at both ends along the arc length direction. The side reinforcements protrude outward from the working surface of the liner body and have a strip-shaped protrusion structure that extends along the arc width direction of the liner body.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting outwardly protruding strip-shaped side reinforcements at both ends of the liner body along the arc length direction, when the liner assembly is subjected to the combined radial and tangential stresses generated during the operation of the grinding mill, the side reinforcements can effectively enhance the bending and torsional strength of the edge areas at both ends of the liner, preventing fatigue cracks or edge curling deformation at the liner edges under repeated stress. At the same time, the reinforcing ribs formed by the strip structure extending along the arc width direction further improve the overall structural rigidity and stability of the liner.

[0012] Furthermore, the area of ​​the top plane of the wear-resistant boss is smaller than the connection area between the base of the wear-resistant boss and the working surface of the liner body, and the included angle between the side wall of the wear-resistant boss and the working surface of the liner body is an acute angle.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the top plane area of ​​the wear-resistant boss smaller than the base connection area and the side wall and the working surface at an acute angle, a gradually narrowing transition structure from the base to the top is formed. This geometric shape allows the force of the material impacting the boss to be distributed and transmitted to the base along the side wall of the boss, avoiding stress concentration at the root of the boss and causing fatigue fracture. At the same time, the acute angle design gives the boss a good guiding effect, guiding the material to slide quickly from the side of the boss without forming a vortex zone around the boss, thus reducing abnormal wear of the material on the liner.

[0014] Furthermore, a groove area is formed between adjacent wear-resistant bosses, the bottom surface of the groove area is the working surface of the liner body, and the groove area is distributed in a grid pattern on the working surface of the liner body.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by forming a grid-like groove area between adjacent wear-resistant bosses, a temporary storage space is provided for the fine particles generated during the grinding process. These grooves can capture some fine powder and form a powder protective layer during the operation of the mill, reducing the impact wear caused by large particles directly hitting the working surface of the liner body. At the same time, the grid-like groove structure increases the contact area between the material and the liner, improving the grinding efficiency. Furthermore, the presence of the grooves makes the flow path of the material on the liner surface more complex, extending the residence time of the material in the grinding area.

[0016] Furthermore, the connecting part includes a plurality of mounting bosses, which protrude outward from the mounting surface of the liner body. Each mounting boss has a bolt through hole at its center, which penetrates the mounting boss and is perpendicular to the mounting surface of the liner body.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by setting several mounting bosses with central bolt through holes on the mounting surface of the liner body, the connection between the liner assembly and the inner wall of the grinding mill cylinder is made more firm and reliable. The protruding structure formed by the mounting bosses protruding from the mounting surface can provide sufficient support strength when the bolts are tightened, preventing the liner from shifting or loosening when subjected to material impact loads. At the same time, the design of the bolt through holes being perpendicular to the mounting surface ensures that the bolt axis is consistent with the normal direction of the inner wall of the cylinder, so that the tightening force is evenly applied to the liner, avoiding the problem of excessive local stress caused by eccentric loads.

[0018] Furthermore, the radius of curvature of the arc-shaped structure of the liner body matches the radius of curvature of the inner wall of the grinding mill cylinder, and the length of the liner body along the arc length direction is greater than the width of the liner body along the arc width direction.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by matching the radius of curvature of the arc of the liner body with the radius of curvature of the inner wall of the grinding mill cylinder, it is ensured that the liner fits tightly with the inner wall of the cylinder after installation, eliminating installation gaps and preventing materials from entering the gap between the liner and the cylinder, causing wear or loosening of the liner. At the same time, the geometric design of the arc length direction length being greater than the arc width direction width allows a single liner to cover a larger area of ​​the inner wall of the cylinder, reducing the number of liner splices, reducing the risk of stress concentration at the splice gaps, and improving the overall reliability of the liner system.

[0020] Furthermore, the top plane of the wear-resistant boss is circular or polygonal, and the wear-resistant bosses are arranged in an alternating or linear manner on the working surface of the liner body.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by designing the top plane of the wear-resistant boss as a circle or polygon and using an alternating or straight arrangement, the flow path of the material on the liner surface exhibits diversified characteristics. The circular top has isotropic wear characteristics, while the polygonal top has a stronger guiding effect in a specific direction. The alternating arrangement increases the tortuosity of the material flow and improves the grinding efficiency, while the straight arrangement facilitates the rapid passage of material through the grinding area. Different arrangement combinations provide flexible design options for optimizing the grinding effect for different material characteristics.

[0022] Furthermore, the liner body is made of high manganese steel or high chromium cast iron, and the wear-resistant boss is cast from the same material as the liner body.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by using high manganese steel or high chromium cast iron and casting the wear-resistant boss and the liner body with the same material, the characteristics of high manganese steel producing a work hardening effect on the surface under impact load or the high hardness and wear resistance of high chromium cast iron itself are utilized, which significantly improves the wear resistance of the liner assembly in the harsh working environment of the grinding mill. At the same time, casting with the same material ensures that there is no mismatch in the coefficient of thermal expansion or electrochemical corrosion caused by the difference in material properties between the boss and the body, thus ensuring the long-term stability of the liner assembly under temperature changes and the action of chemical media.

[0024] Furthermore, the height of the side reinforcement gradually decreases from both ends of the liner body towards the middle, and the mounting bosses are evenly distributed on the mounting surface of the liner body along the arc length and arc width directions.

[0025] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by gradually reducing the height of the side reinforcement from both ends of the liner to the middle, a variable cross-section reinforcement structure is formed that is adapted to the actual stress distribution of the liner in the grinding mill. The edge areas at both ends require higher reinforcing ribs due to the greater boundary constraint stress, while the middle area has a relatively uniform stress and the height of the reinforcing ribs is reduced. This design reduces the weight of the liner and saves materials while ensuring structural strength. At the same time, the uniform distribution of the mounting bosses along the arc length and arc width directions makes the connection force between the liner and the inner wall of the cylinder uniform, avoiding the problem of uneven stress distribution caused by excessively dense or sparse local connections.

[0026] Compared with existing technologies, the beneficial effects of the high wear-resistant liner assembly for a grinding mill device provided by this utility model are as follows: This utility model fundamentally eliminates the joint gap between the traditional welded or inlaid wear-resistant blocks and the liner by integrally casting several wear-resistant bosses with gradually shrinking cross-sections on the working surface of the arc-shaped liner body. This avoids stress concentration and crack initiation problems at the gaps. The frustum shape and flat top design of the bosses allow the material impact force to be dispersed and transmitted to the base along the sidewall of the bosses, significantly reducing local stress peaks. The grid-like grooves between the bosses provide storage space for fine powder and form a powder protective layer, reducing the direct impact of large particles on the liner body. The impact-resistant side reinforcements at both ends and the mounting bosses on the mounting surface enhance the overall performance of the liner plate in terms of both structural rigidity and connection reliability. Manufactured using high-wear-resistant materials such as high-manganese steel or high-chromium cast iron through an integrated casting process, the liner plate assembly ensures the consistency of material properties and structural integrity across all parts. Compared with existing technologies, the liner plate assembly of this invention significantly extends its service life under the same working conditions, reduces the frequency of liner plate replacement, lowers maintenance costs, and improves the continuous operation time and production efficiency of the grinding mill. Furthermore, the modular arc-shaped design of the liner plate assembly facilitates installation and disassembly, providing convenient conditions for the maintenance of the grinding mill. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A front view of a high wear-resistant liner assembly for a grinding mill device;

[0029] Figure 2 A top view of a high wear-resistant liner assembly for a grinding mill device;

[0030] Figure 3 A bottom view of a high wear-resistant liner assembly for a grinding mill device;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 10. Liner plate body; 11. Mounting surface; 12. Working surface; 13. Side reinforcement; 20. Wear-resistant boss; 21. Groove area; 30. Connecting part; 40. Mounting boss. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1-3 The image shows an embodiment of a high wear-resistant liner assembly for a grinding mill device provided by this utility model. In this embodiment, it is used for installation on the inner wall of the grinding mill cylinder. The liner assembly includes a liner body 10, a plurality of wear-resistant bosses 20, and a connecting part 30. The liner body has an arc-shaped plate structure. The concave surface of the liner body is the working surface 12, and the convex surface of the liner body is the mounting surface 11. The plurality of wear-resistant bosses are arranged in an array along the working surface of the liner body. The connecting part is set on the mounting surface of the liner body and is fixedly connected to the inner wall of the grinding mill cylinder by bolts. The wear-resistant bosses protrude inward from the working surface of the liner body. The wear-resistant bosses and the liner body are integrally formed. The cross-sectional shape of the wear-resistant bosses gradually tapers from the base to the top.

[0035] In the above technical solution, the wear-resistant boss is shaped like a truncated cone, the base of the wear-resistant boss is connected to the working surface of the liner body, and the top of the wear-resistant boss is a planar structure.

[0036] Furthermore, in the above technical solution, the liner body is provided with side reinforcements 13 at both ends along the arc length direction. The side reinforcements protrude outward from the working surface of the liner body and have a strip-shaped protrusion structure that extends along the arc width direction of the liner body.

[0037] Furthermore, in the above technical solution, the area of ​​the top plane of the wear-resistant boss is smaller than the connection area between the base of the wear-resistant boss and the working surface of the liner body, and the included angle between the side wall of the wear-resistant boss and the working surface of the liner body is an acute angle.

[0038] Furthermore, in the above technical solution, a groove area is formed between adjacent wear-resistant bosses, the bottom surface of the groove area is the working surface of the liner body, and the groove area is distributed in a grid pattern on the working surface of the liner body.

[0039] Furthermore, in the above technical solution, the connecting part includes a plurality of mounting bosses 40, which protrude outward from the mounting surface of the liner body. Each mounting boss has a bolt through hole at its center, which passes through the mounting boss and is perpendicular to the mounting surface of the liner body.

[0040] Furthermore, in the above technical solution, the radius of curvature of the arc structure of the liner body matches the radius of curvature of the inner wall of the grinding mill cylinder, and the length of the liner body along the arc length direction is greater than the width of the liner body along the arc width direction.

[0041] Furthermore, in the above technical solution, the top plane shape of the wear-resistant boss is circular or polygonal, and the wear-resistant boss is arranged in an alternating or straight-line arrangement on the working surface of the liner body.

[0042] Furthermore, in the above technical solution, the liner body is made of high manganese steel or high chromium cast iron, and the wear-resistant boss is cast from the same material as the liner body.

[0043] Furthermore, in the above technical solution, the height of the side reinforcement gradually decreases from both ends of the liner body towards the middle, and the mounting bosses are evenly distributed on the mounting surface of the liner body along the arc length and arc width directions.

[0044] When using the high wear-resistant liner assembly of this utility model, first open the inspection port of the grinding mill cylinder, clean the residual material on the inner wall surface of the cylinder and the mounting holes of the old liner, and then install multiple liner assemblies sequentially along the circumferential direction of the inner wall of the cylinder. During installation, the arc-shaped mounting surface of the liner body is fitted against the inner wall of the cylinder, so that the curvature of the liner body is aligned with the curvature of the inner wall of the cylinder. Bolts are inserted through the bolt through holes on the mounting boss and mate with the pre-set threaded holes on the cylinder wall. A torque wrench is used to tighten the bolts to the specified torque value, ensuring that each liner assembly fits tightly against the inner wall of the cylinder and that the splicing gap between adjacent liners is minimized. After installation, check the tightness of all bolts and the integrity of the wear-resistant bosses on the liner surface. After closing the cylinder inspection port, start the mill for no-load test run and observe whether there is any abnormal vibration or noise in the liner assembly. After the test run is normal, put materials in for formal production. During the operation of the mill, the wear-resistant bosses collide and rub against the materials. The frustum shape of the bosses guides the materials to slide down the side wall. The grooves between the bosses gradually accumulate fine powder to form a protective layer. Stop the machine regularly to check the wear of the liner. When the wear-resistant bosses are worn to a height lower than two-thirds of the initial height or when there are obvious cracks in the liner body, the liner assembly should be replaced in time.

[0045] The following is a specific embodiment 1 of this utility model: The high wear-resistant liner assembly provided in this embodiment is used to install on the inner wall of a ball mill cylinder with a diameter of 3000mm. The liner body is integrally cast from high manganese steel ZGMn13 material using sand casting. The liner body has an arc-shaped plate structure with a radius of curvature of 1480mm, matching the radius of curvature of 1500mm of the inner wall of the ball mill cylinder. The length of the liner body along the arc length direction is 800mm, the width along the arc width direction is 400mm, and the thickness of the liner body is 60mm. The concave surface of the liner body is the working surface, and the convex surface is the mounting surface. 80 wear-resistant bosses are evenly distributed on the working surface of the liner body. The wear-resistant bosses are truncated cones in shape, and the base of each wear-resistant boss... The diameter of the top surface is 50mm, the diameter of the top plane is 30mm, the height of the boss is 40mm, the angle between the sidewall of the boss and the working surface is 75 degrees, the center distance between adjacent wear-resistant bosses is 80mm, and the wear-resistant bosses are arranged in a staggered pattern, so that the positions of adjacent rows of bosses are arranged in a quincunx pattern. The bottom surface of the groove area formed between the bosses is the working surface of the liner body. The grooves are distributed in a grid pattern. At each end of the liner body along the arc length direction, there is a side reinforcement. The side reinforcement protrudes outward from the working surface and has a strip-shaped protrusion structure. The side reinforcement extends along the arc width direction and runs through the entire width of the liner. The height of the side reinforcement at both ends of the liner is 25mm, gradually decreasing to 15mm towards the middle of the liner. The width of the side reinforcement is 30mm. The liner assembly has 12 cylindrical protrusions on its mounting surface. Each protrusion has a diameter of 60 mm and a height of 20 mm. The protrusions are arranged in three rows of four protrusions each, forming a rectangular array. Each protrusion has a 18 mm diameter bolt hole at its center, penetrating the protrusion and perpendicular to the mounting surface. The depth of the bolt hole is the same as the height of the protrusion. During installation, M16 bolts are used to fix the liner to the inner wall of the ball mill cylinder through the bolt holes. The bolt tightening torque is 200 Nm. The entire liner assembly is cast and then annealed at 1050℃ for 4 hours, followed by water cooling to room temperature, resulting in a single-phase austenitic structure in the high-manganese steel. It possesses good toughness and is installed in a ball mill for grinding quartz ore with a Mohs hardness of 7. The ball mill speed is 18 revolutions per minute, the material filling rate is 30%, and the steel ball filling rate is 35%. During use, the wear-resistant bosses withstand repeated impacts from the steel balls and ore. Under the impact, the boss surface undergoes work hardening, increasing the surface hardness from the initial HB200 to over HB450. The frustoconical shape of the bosses disperses the impact force along the sidewalls towards the base. The grooves between the bosses gradually accumulate fine mineral powder to form a protective layer, reducing the direct impact of large particles on the liner body. The side reinforcement effectively prevents cracks from forming at the liner edges under stress. The fit between the mounting bosses and bolts ensures that the liner does not loosen under long-term vibration.The liner assembly was inspected after 6000 hours of continuous use. The average wear height of the wear-resistant bosses was 12mm, and no cracks appeared in the liner body. Compared to ball mills using flat liner types, which require liner replacement after 3000 hours, the service life of the liner in this invention is significantly improved.

[0046] The following is another specific embodiment 2 of this utility model: Embodiment 2 is based on Embodiment 1, but the top plane shape of the wear-resistant boss is changed from a circle to a regular hexagon. The distance between opposite sides of the regular hexagon is 30mm. The base of the boss remains circular with a diameter of 50mm, forming a transition section from a circle to a regular hexagon from the base to the top. The sidewalls of the boss have six planes, each with an angle of 75 degrees to the working surface of the liner. The six edges of the top of the regular hexagon are arranged radially and tangentially along the mill cylinder, so that the material is guided by the edges of the boss in different directions during impact. The hexagonal edges exert a stronger shearing effect on the material in the early stages of use, improving grinding efficiency. At the same time, the groove shape between adjacent bosses after the hexagonal arrangement presents a more regular geometric shape, which is conducive to the uniform distribution of fine powder in the groove and the formation of a protective layer. The remaining structure and dimensions are the same as in Example 1. The liner assembly of this embodiment is used for grinding iron ore. After 5800 hours of use under the same working conditions, the wear at the hexagonal edges of the wear-resistant bosses is relatively fast, but the overall wear is uniform. No cracks appeared in the liner body. The hexagonal bosses have a better shearing and crushing effect on iron ore than the circular bosses.

[0047] The following is another specific embodiment 3 of this utility model: Embodiment 3 is based on Embodiment 1, but the material of the liner body is changed to high-chromium cast iron KmTBCr26. High-chromium cast iron contains a large amount of hard carbide phases, and its as-cast hardness can reach HRC58 or higher, exhibiting excellent wear resistance. It is integrally cast using a lost foam casting process, followed by stress-relief annealing at 550℃ for 3 hours, and then air-cooled to room temperature. Because high-chromium cast iron has high hardness but relatively low toughness, the height of the wear-resistant boss is reduced from 40mm to 35mm, while the base diameter remains at 50mm, and the top diameter is increased to 35mm, thus reducing the taper of the boss. The size of the bosses is increased to improve their resistance to breakage. The spacing between the bosses remains unchanged at 80mm. The height of the side reinforcement is appropriately increased, with the height at both ends being 30mm and the height in the middle being 20mm, to compensate for the lack of toughness of high-chromium cast iron. The rest of the structure is the same as in Example 1. The liner assembly in this example is used for grinding cement clinker. Cement clinker has high hardness and certain corrosiveness. The high hardness and corrosion resistance of high-chromium cast iron perform excellently under this working condition. After 5500 hours of continuous use, the wear height of the wear-resistant bosses is 8mm, which is less than that of the high-manganese steel liner. However, a small number of fine cracks appear on the edge of the liner. Due to the restraint of the side reinforcement, the cracks do not extend to the main body area of ​​the liner. The overall performance is good.

[0048] Specifically, the principle of this utility model is as follows: The core technical principle of this utility model lies in forming several wear-resistant bosses with gradually shrinking cross-sections on the working surface of the liner body through an integrated casting process. This integrated molding structure eliminates the interface between different components from a materials metallurgical perspective, making the entire liner assembly a continuous metal matrix. This avoids stress concentration and crack initiation problems caused by differences in material properties, mismatched coefficients of thermal expansion, or insufficient bonding strength at the interface. The frustum shape of the wear-resistant boss conforms to the stress diffusion principle in mechanics. When material particles impact the top of the boss at high speed, the impact force gradually diffuses through the inclined surface of the boss to the base, causing the stress to change from a concentrated state at the top to a distributed state at the base, reducing the stress peak inside the liner body. The planar structure at the top of the boss provides an appropriate contact area, ensuring that the boss has sufficient load-bearing capacity and achieving a grinding function through the friction between the plane and the material. The grid-like grooves utilize the self-protection effect in powder mechanics. The fine powder filling the grooves forms a powder layer that absorbs some impact energy and acts as a lubricating medium to reduce abrasive wear. The side reinforcement is based on the mechanical theory of plate and shell structures. By increasing the moment of inertia of the edge area, the liner's ability to resist bending and torsional deformation is improved. Several mounting bosses on the mounting surface ensure the reliability of the connection by increasing the local stiffness of the bolt connection. When using high-manganese steel, its work hardening characteristics, which induce martensitic phase transformation under impact load, are utilized, resulting in a significant increase in surface hardness. When using high-chromium cast iron, the high hardness and wear resistance provided by the large number of hard carbide phases in its structure are utilized. During operation, the entire liner assembly effectively disperses and absorbs the impact energy of materials through the guiding effect of the bosses, the buffering effect of the grooves, the supporting effect of the reinforcement, and the synergistic effect of the integrated structure, fundamentally extending the service life of the liner.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high wear-resistant liner assembly for a grinding mill device, used for installation on the inner wall of the grinding mill cylinder, the liner assembly comprising a liner body, a plurality of wear-resistant bosses, and a connecting portion, wherein the liner body has an arc-shaped plate structure, the concave surface of the liner body is the working surface, the convex surface of the liner body is the mounting surface, the plurality of wear-resistant bosses are arranged in an array along the working surface of the liner body, the connecting portion is disposed on the mounting surface of the liner body, and the connecting portion is fixedly connected to the inner wall of the grinding mill cylinder by bolts, characterized in that... The wear-resistant boss protrudes inward from the working surface of the liner body. The wear-resistant boss and the liner body are integrally formed. The cross-sectional shape of the wear-resistant boss gradually tapers from the base to the top.

2. The high wear-resistant liner assembly for a grinding mill device according to claim 1, characterized in that, The wear-resistant boss is shaped like a truncated cone, the base of the wear-resistant boss is connected to the working surface of the liner body, and the top of the wear-resistant boss is a planar structure.

3. The high wear-resistant liner assembly for a grinding mill device according to claim 2, characterized in that, The liner body has side reinforcements at both ends along the arc length direction. The side reinforcements protrude outward from the working surface of the liner body and have a strip-shaped protrusion structure that extends along the arc width direction of the liner body.

4. The high wear-resistant liner assembly for a grinding mill device according to claim 3, characterized in that, The area of ​​the top plane of the wear-resistant boss is smaller than the connection area between the base of the wear-resistant boss and the working surface of the liner body, and the included angle between the side wall of the wear-resistant boss and the working surface of the liner body is an acute angle.

5. The high wear-resistant liner assembly for a grinding mill device according to claim 4, characterized in that, A groove area is formed between adjacent wear-resistant bosses, the bottom surface of the groove area is the working surface of the liner body, and the groove area is distributed in a grid pattern on the working surface of the liner body.

6. The high wear-resistant liner assembly for a grinding mill device according to claim 5, characterized in that, The connecting part includes a plurality of mounting bosses, which protrude outward from the mounting surface of the liner body. Each mounting boss has a bolt through hole at its center, which passes through the mounting boss and is perpendicular to the mounting surface of the liner body.

7. The high wear-resistant liner assembly for a grinding mill device according to claim 6, characterized in that, The radius of curvature of the arc-shaped structure of the liner body matches the radius of curvature of the inner wall of the grinding mill cylinder, and the length of the liner body along the arc length direction is greater than the width of the liner body along the arc width direction.

8. The high wear-resistant liner assembly for a grinding mill device according to claim 7, characterized in that, The top plane of the wear-resistant boss is circular or polygonal, and the wear-resistant bosses are arranged in an alternating or linear manner on the working surface of the liner body.

9. A high wear-resistant liner assembly for a grinding mill device according to claim 8, characterized in that, The liner body is made of high manganese steel or high chromium cast iron, and the wear-resistant boss is cast from the same material as the liner body.

10. A high wear-resistant liner assembly for a grinding mill device according to claim 9, characterized in that, The height of the side reinforcement gradually decreases from both ends of the liner body towards the middle, and the mounting bosses are evenly distributed on the mounting surface of the liner body along the arc length and arc width directions.

Images