Ore grinding experiment system capable of monitoring motion characteristics on line

Abstract

The utility model discloses an ore grinding experiment system for monitoring motion characteristics on line. The device comprises a driving assembly, a transmission assembly and a rotating cylinder, and the driving assembly drives the rotating cylinder to rotate through the transmission assembly. The rotating cylinder comprises a cylinder body in an annular wall shape, a rear cover arranged at the rear end of the cylinder body in a sealing and covering mode and a composite front cover arranged at the front end of the cylinder body in a sealing and covering mode. A plurality of lifting strips are connected to the inner wall of the cylinder body, and the composite front cover comprises a cover body with a hollow hole in the middle, an anti-abrasion screen plate embedded in the hollow hole and a transparent cover plate covering the outer side of the anti-abrasion screen plate. The strain sensors are arranged on the inner wall of the barrel and / or the lifting strip in a distributed mode, the high-speed camera is arranged on the outer side of the transparent cover plate and used for obtaining moving images of objects in the rotating barrel through the transparent cover plate and the abrasion-proof net plate, and the strain sensors and the high-speed camera are connected to a control terminal in an information transmission mode. Motion characteristics of an object in the rotating cylinder are monitored on line.

Description

Technical Field

[0001] This utility model relates to the field of grinding and powder preparation equipment in mechanical engineering, and in particular to a grinding experimental system for online monitoring of motion characteristics. Background Technology

[0002] Grinding media are both the implementer of ore crushing and the transmitter of the energy required for ore crushing. Their motion determines the energy of the steel balls impacting the ore within the mill. On one hand, they determine the crushing behavior of the ore; on the other hand, they have a decisive influence on the mill's production capacity, the quality of the ground product (including particle size characteristics and monomer liberation characteristics), the steel and energy consumption during the grinding process, and the service life of the liner. Many factors influence the motion of grinding media. The motion characteristics of grinding media in a ball mill are comprehensively affected by various factors such as the mill structure, media characteristics, operating parameters, and material characteristics. Reasonable optimization of these parameters can significantly improve grinding efficiency. Because the grinding media moves within a sealed cylinder, and the grinding environment is extremely complex, it is difficult to accurately quantify the motion characteristics of the grinding media. Therefore, existing technologies also employ monitoring methods to monitor motion characteristics. However, traditional grinding experimental systems mainly infer the motion state inside the cylinder through offline sampling or indirect parameters (such as power and rotational speed). These monitoring methods have limitations, making it difficult to directly and in real-time acquire key parameters such as the three-dimensional motion trajectory, collision frequency, and energy distribution of the material and grinding media within the cylinder. This leads to process optimization relying on trial and error, resulting in low efficiency. Furthermore, there are difficulties in observation and data fusion, as the closed structure of the cylinder hinders the visualization and monitoring of internal motion, and data from a single sensor (such as vibration and noise) cannot fully reflect the complex multi-body interaction laws.

[0003] Therefore, it is necessary to propose a technical solution to overcome the shortcomings of existing technologies. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this invention proposes an online grinding experiment system for monitoring motion characteristics. This system can be used to simulate and study grinding efficiency under different grinding environments. The results of these studies can be used to guide actual industrial production and further optimize grinding efficiency, providing a basis for the efficient configuration of grinding systems in actual industrial production.

[0005] This utility model is achieved through the following technical solution: a grinding experiment system for online monitoring of motion characteristics, comprising a drive assembly, a transmission assembly, and a rotating cylinder. The drive assembly drives the rotating cylinder to rotate through the transmission assembly. The rotating cylinder includes a cylinder body with an annular wall, a rear cover with a sealing cap at the rear end of the cylinder body, and a composite front cover with a sealing cap at the front end of the cylinder body. Several lifting bars are connected to the inner wall of the cylinder body. The composite front cover includes a cover body with a hollow hole in the middle, a wear-resistant mesh plate embedded in the hollow hole, and a transparent cover plate covering the outside of the wear-resistant mesh plate. The grinding experiment system also includes several strain sensors dispersedly arranged on the inner wall of the cylinder body and / or on the lifting bars, and a high-speed camera located outside the transparent cover plate to acquire motion images of objects inside the rotating cylinder through the transparent cover plate and the wear-resistant mesh plate. The strain sensors and the high-speed camera can be transmitted to a control terminal to monitor the motion characteristics of objects inside the rotating cylinder online.

[0006] As a further improved technical solution, the width of the annular area formed by the cover body is greater than the height of the lifting strip protruding from the inner wall of the cylinder.

[0007] As a further improved technical solution, the lifting bar is detachably installed on the inner wall of the cylinder by screws, and the lifting bar is selected from one of alloy steel, stainless steel, high wear-resistant polyurethane, corundum ceramic, and zirconium oxide.

[0008] As a further improved technical solution, the strain sensor installed on the lifting bar is removed synchronously along with the lifting bar when the lifting bar is removed from the cylinder.

[0009] As a further improved technical solution, the ratio of the length to the diameter of the rotating cylinder is between 1.55 and 1.65.

[0010] As a further improved technical solution, the transparent cover is an organic glass plate, and there is a gap between the wear-resistant mesh plate and the transparent cover.

[0011] As a further improved technical solution, the transmission assembly includes a first coupling, a torque and speed sensor, a second coupling, and a transmission shaft assembly connected in sequence. The first coupling is connected to the drive assembly, and the transmission shaft assembly is connected to the rotating cylinder through a connecting flange.

[0012] As a further improved technical solution, the transmission shaft assembly includes a transmission shaft, a bearing sleeved on the transmission shaft, and a bearing support supporting the bearing. The bearing support is height-adjustable and is provided with vibration damping pads.

[0013] As a further improved technical solution, the torque and speed sensor is supported by a support base, which is height-adjustable.

[0014] As a further improved technical solution, the grinding experimental system includes a support frame, which includes a high-level platform and a low-level platform with a height difference. The drive assembly and transmission assembly are installed on the high-level platform, and the rotating cylinder is suspended above the low-level platform.

[0015] By adopting the above technical solution, this utility model provides a grinding experimental system that combines high wear resistance, real-time monitoring of multiple parameters, and visualization analysis, for simulating and studying grinding efficiency under different grinding environments. Through innovative composite front cover structure, distributed sensor layout, and multimodal data fusion design, this utility model effectively solves the shortcomings of traditional monitoring methods in terms of accuracy, durability, and comprehensiveness, providing a new experimental platform for grinding mechanism research and process optimization. Attached Figure Description

[0016] Figure 1 This is a three-dimensional exploded view of the grinding experimental system for online monitoring of motion characteristics according to this utility model.

[0017] Figure 2 This is a three-dimensional assembly diagram of the grinding experimental system for online monitoring of motion characteristics according to this utility model.

[0018] Figure 3 This is a three-dimensional assembly diagram of the composite front cover in the online monitoring motion characteristics grinding system of this utility model.

[0019] Figure 4 yes Figure 3 A three-dimensional composite diagram of the components shown from another perspective.

[0020] Figure 5 yes Figure 3 Exploded view of the component shown.

[0021] Figure 6 yes Figure 3 A cross-sectional view of the component shown.

[0022] The attached diagram is labeled as follows: 1. Bracket; 11. High-level platform; 12. Low-level platform; 2. Drive assembly; 3. Transmission assembly; 31. First coupling; 32. Second coupling; 33. Torque and speed sensor; 34. Transmission shaft assembly; 341. Transmission shaft; 342. Bearing; 343. Bearing support; 4. Rotating cylinder; 41. Cylinder body; 42. Rear cover; 43. Composite front cover; 431. Cover body; 4310. Hollow hole; 432. Anti-wear mesh plate; 4321. Mesh; 43. Transparent cover plate; 44. Lifting bar; 5. Connecting flange. Detailed Implementation

[0023] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] This utility model application relates to a National Natural Science Foundation of China project with approval number 52304290, which involves the selection of grinding media and the study of grinding control mechanism. This utility model application is one of the innovative solutions under this research project. The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] Please see Figures 1 to 6 As shown, this utility model provides a grinding experiment system for online monitoring of motion characteristics, which includes a drive assembly 2, a transmission assembly 3, and a rotating cylinder 4. The drive assembly 2 drives the rotating cylinder 4 to rotate through the transmission assembly 3. The rotating cylinder 4 includes a cylinder body 41 with an annular wall, a rear cover 42 sealing the rear end of the cylinder body 41, and a composite front cover 43 sealing the front end of the cylinder body 41. A plurality of lifting strips 44 are connected to the inner wall of the cylinder body 41. The composite front cover 43 includes a cover body 431 with a hollow hole 4310 in the middle, an anti-wear mesh plate 432 embedded in the hollow hole 4310, and a transparent cover plate 43 covering the outside of the anti-wear mesh plate 432. The grinding experimental system also includes a number of strain sensors distributed on the inner wall of the cylinder 41 and / or the lifting bar 44, and a high-speed camera located on the outside of the transparent cover plate 43 to acquire images of the motion of the object inside the rotating cylinder 4 through the transparent cover plate 43 and the anti-wear mesh plate 432. The strain sensors and the high-speed camera can be connected to a control terminal for information transmission to monitor the motion characteristics of the object inside the rotating cylinder 4 online.

[0026] This invention provides a grinding experimental system that combines high wear resistance, real-time monitoring of multiple parameters, and visualization analysis, for simulating and studying grinding efficiency under different grinding environments. Through an innovative composite front cover structure, distributed sensor layout, and multimodal data fusion design, this invention effectively addresses the shortcomings of traditional monitoring methods in terms of accuracy, durability, and comprehensiveness, providing a novel experimental platform for grinding mechanism research and process optimization.

[0027] Please see Figure 1 and Figure 2As shown, the grinding experimental system includes a support frame 1, a drive assembly 2, a transmission assembly 3, a rotating cylinder 4, and a data acquisition assembly. The support frame 1 includes a higher platform 11 and a lower platform 12 with a height difference. The drive assembly 2 and the transmission assembly 3 are mounted on the higher platform 11, and the rotating cylinder 4 is suspended above the lower platform 12. That is, the support frame 1 adopts a stepped structure design, divided into a higher platform 11 and a lower platform 12. The drive assembly 2 and the transmission assembly 3 are fixed to the higher platform 11, and the rotating cylinder 4 is suspended above the lower platform 12 via a transmission shaft assembly 34. This layout not only forms a stable power transmission path but also facilitates the placement of a high-speed camera through the height difference design, solving the problem of the inability to visually monitor traditional enclosed cylinders.

[0028] Please continue reading. Figure 1 and Figure 2 As shown, the rotating cylinder 4 includes a cylinder body 41, a rear cover 42, and a composite front cover 43. The cylinder body 41 has an annular wall shape, and its length-to-diameter ratio is in the range of 1.55 to 1.65. This ratio optimizes the movement trajectory of materials inside the cylinder, ensuring thorough mixing of the grinding media. Several lifting bars 44 are detachably installed on the inner wall of the cylinder body 41 by screws. The lifting bars 44 are made of a material selected from alloy steel, stainless steel, high wear-resistant polyurethane, corundum ceramic, and zirconium oxide. The lifting bars 44 are detachably installed on the inner wall of the cylinder body 41 by screws. This detachable design allows for quick replacement and facilitates simulation of the impact of different lifting bars 44 on grinding efficiency.

[0029] Please continue reading. Figure 1 and Figure 2 As shown, in this embodiment, the drive assembly 2 includes a motor and a motor reducer. The transmission assembly 3 includes a first coupling 31, a torque and speed sensor 33, a second coupling 32, and a transmission shaft assembly 34 connected in sequence. The first coupling 31 is connected to the output shaft of the drive assembly 2, and the transmission shaft assembly 34 is connected to the rotating cylinder 4 via a connecting flange 5.

[0030] The drive shaft assembly 34 includes a drive shaft 341, a double-row roller bearing 342, and a bearing support 343. The bearing support 343 is fixed to the raised platform 11 by bolts, and a rubber vibration damping pad is provided at its bottom for buffering and vibration reduction. In this embodiment, the bearing support 343 is height-adjustable. This height-adjustable design can compensate for machining or installation errors, and by adjusting it, the coaxiality of the overall structure is ensured, avoiding vibration problems caused by eccentric installation of the drive shaft, and ensuring smooth operation of the rotating cylinder 4. The torque and speed sensor 33 is supported by a support base 35, which is also height-adjustable. Specifically, in this embodiment, the support base 35 is equipped with adjusting bolts, which can finely adjust the height of the torque and speed sensor 33 to ensure the coaxiality of the drive shaft, thereby accurately measuring the drive torque and speed, and providing a data basis for grinding energy consumption analysis.

[0031] Please see Figures 3 to 6 As shown, the composite front cover 43 consists of a cover body 431, an anti-wear mesh plate 432, and a transparent cover plate 433. The cover body 431 is an annular metal structure with a circular perforated hole 4310 in the center. In this embodiment, the width of the annular area formed by the cover body 431 is greater than the height of the lifting bar 44 protruding from the inner wall of the cylinder 41; that is, when the composite front cover 43 is closed on the front end of the cylinder 41, the height of the lifting bar 44 protruding from the inner wall of the cylinder 41 does not exceed the annular area of ​​the cover body 431, so as to avoid the problem that the ore material lifted and thrown down by the lifting bar 44 will come into contact with the anti-wear mesh plate 432 at the beginning of the fall, thus affecting the falling trajectory.

[0032] The anti-wear mesh plate 432 is a metal plate or metal mesh with perforations 4320, which is embedded in the hollow holes 4310. In this embodiment, the anti-wear mesh plate 432 does not protrude from the cover body 431 to avoid obstructing the movement of grinding media or ore abrasives inside the rotating cylinder 4. In some embodiments, the anti-wear mesh plate 432 is made of alloy steel mesh with a mesh density of 20 meshes and a thickness of 5 mm, used to block large particles from splashing, while allowing a high-speed camera to capture images of movement inside the cylinder through the perforations 4321. The transparent cover plate 433 covers the outside of the anti-wear mesh plate 432. In this embodiment, the transparent cover plate 433 protrudes from the outside of the cover body 431; in other embodiments, the transparent cover plate 433 may also be set to be embedded in the hollow holes 4310 of the cover body 431. In this embodiment, the transparent cover plate 433 is a high-strength plexiglass plate, and there is a gap between the transparent cover plate 433 and the anti-wear mesh plate 432. This spacing forms a buffer space, which can reduce the wear of material impact on the transparent cover plate 433, extend the service life of the transparent cover plate 433, and prevent the light transmittance of the transparent cover plate 433 from being affected by wear, so that the high-speed camera cannot clearly capture the movement of the grinding media and materials.

[0033] In this embodiment, the strain sensor is a miniature patch strain sensor, which is distributed on the inner wall of the cylinder 41 and the lifting bar 44. This embodiment of the invention, by using strain sensors on the inner wall of the cylinder 41 and the lifting bar 44 respectively, and by co-analyzing the data obtained from these sensors, can more accurately analyze the lifting and throwing motion of the material by the lifting bar 44. This provides accurate data support for studying the collision effect of the material under different parameters and for simulating the position of the material during rotation. The strain sensors on the lifting bar 44 are removed synchronously with the lifting bar 44 when the lifting bar 44 is removed from the cylinder 41. This facilitates disassembly and allows for the easy installation of matching stress sensors for lifting bars 44 of different materials and structures, ensuring the validity and reliability of the detection data. In other words, the detachable design of the lifting bar 44 and its synchronous removal with the strain sensor simplify the maintenance process of the experimental system and support the rapid replacement of lifting bars of different materials to simulate various working conditions. In some embodiments, the stress distribution data collected in real time by the strain sensor on the inner wall of the cylinder 41 or on the lifting bar 44 can be transmitted to the control terminal via a wireless module, providing a quantitative basis for analyzing the collision energy distribution of the grinding media.

[0034] A high-speed camera positioned outside the transparent cover plate 433 operates at a preset frame rate, capturing the three-dimensional motion trajectory of the material inside the cylinder through the mesh 4321 of the anti-wear mesh plate 432. Since the mesh 4321 of the anti-wear mesh plate 432 is much smaller than the diameter of the grinding media, it effectively blocks material splashing without significantly affecting image clarity. Simultaneously, the spacing between the anti-wear mesh plate 432 and the transparent cover plate 433 significantly reduces wear on the transparent cover plate caused by material impact, ensuring clear observation by the high-speed camera. After the high-speed camera data and strain sensor data are fused by the control terminal, key parameters such as collision frequency, energy distribution, and media motion trajectory can be generated, solving the problem that traditional single-sensor data cannot comprehensively reflect multi-body interactions. The control terminal can specifically be a computer, host computer, or other device capable of sending and receiving control commands, as well as collecting, processing, and displaying data information.

[0035] As can be seen from the above description of the specific embodiments, the grinding experimental system for online monitoring of motion characteristics provided by this utility model has the functions of high wear resistance, real-time monitoring of multiple parameters and visualization analysis. Through the innovative composite front cover 43 structure, distributed sensor layout and multimodal data fusion design, it effectively solves the shortcomings of traditional monitoring methods in terms of accuracy, durability and comprehensiveness, and provides a new experimental platform for grinding mechanism research and process optimization.

[0036] This utility model has been described through several specific embodiments. Those skilled in the art should understand that various modifications and equivalent substitutions can be made to this utility model without departing from its scope. Furthermore, various modifications can be made to this utility model for specific situations or circumstances without departing from its scope. Therefore, this utility model is not limited to the specific embodiments disclosed, but should include all embodiments falling within the scope of the claims of this utility model.

Claims

1. An on-line monitoring motion characteristic grinding experiment system, comprising a driving assembly, a transmission assembly and a rotating cylinder, the driving assembly drives the rotating cylinder to rotate through the transmission assembly, characterized in that, The rotating cylinder comprises a cylindrical body in the shape of an annular wall, a rear cover provided at the rear end of the cylindrical body, and a composite front cover provided at the front end of the cylindrical body, a plurality of lifting strips are connected to the inner wall of the cylindrical body, the composite front cover comprises a cover body provided with a hollow hole in the middle, a wear-resistant mesh plate embedded in the hollow hole, and a transparent cover plate covering the outer side of the wear-resistant mesh plate, the grinding experiment system further comprises a plurality of strain sensors arranged in a dispersed manner on the inner wall of the cylindrical body and / or the lifting strips, and a high-speed camera provided outside the transparent cover plate to obtain the motion image of the object in the rotating cylinder through the transparent cover plate and the wear-resistant mesh plate, the strain sensor and the high-speed camera are connected to the control terminal in information transmission, so as to monitor the motion characteristics of the object in the rotating cylinder online.

2. The online monitoring of the motion characteristics of the grinding experiment system according to claim 1, wherein, The width of the annular area formed by the cover body is greater than the height of the lifting strip protruding from the inner wall of the cylindrical body.

3. The online monitoring of the motion characteristics of the grinding experiment system according to claim 2, wherein, The lifting strip is detachably mounted on the inner wall of the cylindrical body by screws, and the lifting strip is selected from one of alloy steel, stainless steel, high wear-resistant polyurethane, corundum ceramic and zirconia.

4. The online monitoring of the motion characteristics of the grinding experiment system according to claim 3, wherein, The strain sensor arranged on the lifting strip is synchronously removed with the lifting strip when the lifting strip is removed from the cylindrical body.

5. The online monitoring of the motion characteristics of the grinding experiment system according to claim 1, wherein, The ratio of the length to the diameter of the rotating cylinder is between 1.55 and 1.

65.

6. The online monitoring of motion characteristics of a grinding experiment system according to claim 1, wherein, The transparent cover plate is a plexiglass plate, and the wear-resistant mesh plate and the transparent cover plate have a spacing therebetween.

7. The online monitoring motion characteristic grinding experiment system according to any one of claims 1-6, wherein, The transmission assembly comprises a first coupling, a torque and speed sensor, a second coupling and a transmission shaft assembly connected in sequence, the first coupling is connected to the driving assembly, and the transmission shaft assembly is connected to the rotating cylinder through a connecting flange.

8. The online monitoring of the motion characteristics of the grinding experiment system according to claim 7, wherein, The transmission shaft assembly comprises a transmission shaft, a bearing arranged on the transmission shaft, and a bearing support supporting the bearing, the bearing support is arranged in a height-adjustable manner, and the bearing support is provided with a damping pad.

9. The online monitoring of motion characteristics of a grinding experiment system according to claim 7, wherein, The torque and speed sensor is supported by a support seat below, and the support seat is arranged in a height-adjustable manner.

10. The online monitoring motion characteristic grinding experiment system according to any one of claims 1-6, wherein, The grinding experiment system comprises a support, the support comprises high-order and low-order platforms with height difference, the driving assembly and the transmission assembly are installed on the high-order platform, and the rotating cylinder is suspended above the low-order platform.

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