A vibration platform structure of a spherical graphite vibration mill

Abstract

The utility model provides a kind of vibration platform structure of spherical graphite vibration grinding machine, belong to graphite vibration grinding machine technical field, the vibration platform structure of this spherical graphite vibration grinding machine, it include: vibration platform body, vibration excitation device, elastic support component, grinding vessel, transmission connecting mechanism and damping control device, vibration platform body is rectangular plate, and upper surface central fixed spherical grinding vessel;Excitation motor is fixed in the center of bottom surface, output shaft is coaxial with eccentric wheel component, and main, vice eccentric wheel is divided on the upper and lower ends of rotating shaft;Each elastic support unit is arranged in four corners, including support seat and helical compression spring, support seat bolt is fixed bottom surface, and spring lower end is connected ground surface;Vibration is transmitted to grinding vessel by platform by transmission connecting mechanism;The utility model can solve the technical problems that vibration transmission efficiency is low, grinding uniformity is poor and equipment stability is insufficient in the vibration platform structure of spherical graphite vibration grinding equipment in the prior art.

Description

Technical Field

[0001] This utility model belongs to the technical field of graphite vibration grinding machines, and more specifically, relates to a vibration platform structure for a spherical graphite vibration grinding machine. Background Technology

[0002] Spherical graphite, a crucial component of lithium-ion battery anode materials, directly impacts battery performance due to its morphology and particle size distribution. Currently, industrial production primarily employs vibratory grinding technology to spheroidize natural graphite. High-frequency vibration causes graphite particles to collide and rub against each other, gradually forming spherical or near-spherical morphologies. Existing vibratory grinding equipment mainly includes vibratory sieving, rotary drum, and vibratory platform types. Vibratory sieving equipment has a simple structure but low grinding efficiency, and the particle movement trajectory on the screen is singular, making it difficult to achieve sufficient spheroidization. Rotary drum equipment, while providing continuous grinding, consumes more energy and produces uneven particle size distribution. Vibratory platform equipment is currently the most widely used technology. It drives the grinding container to generate high-frequency vibrations through a vibratory platform, causing graphite particles to form complex motion trajectories within the container. However, existing vibratory platform equipment generally suffers from low vibration transmission efficiency. Improper connection between the vibratory platform and the grinding container leads to significant vibration energy loss, affecting the grinding effect. Furthermore, existing equipment uses a single eccentric wheel excitation method, resulting in relatively simple vibration modes that are difficult to form ideal three-dimensional motion trajectories. The equipment's support system also has shortcomings. Conventional spring supports have fixed stiffness and cannot adapt to the vibration characteristics required under different working conditions, resulting in poor equipment stability and short service life. Utility Model Content

[0003] In view of this, the present invention provides a vibration platform structure for a spherical graphite vibratory grinding machine, which can solve the technical problems of low vibration transmission efficiency, poor grinding uniformity and insufficient equipment stability in the existing vibration platform structure of spherical graphite vibratory grinding equipment.

[0004] This utility model is implemented as follows: This utility model provides a vibration platform structure for a spherical graphite vibratory grinding machine, comprising: a vibration platform body, a vibration excitation device, an elastic support assembly, a grinding container, a transmission connection mechanism, and a damping control device; the vibration platform body is a rectangular plate structure, and a grinding container is fixedly installed in the central area of ​​the upper surface of the vibration platform body, the grinding container having a spherical cavity structure; the vibration excitation device includes an excitation motor and an eccentric wheel assembly, the excitation motor is fixedly installed at the center of the bottom surface of the vibration platform body, and the output shaft of the excitation motor is coaxially connected to the rotating shaft of the eccentric wheel assembly, the eccentric wheel assembly including a main eccentric wheel... The main eccentric wheel and the auxiliary eccentric wheel are fixed to the upper and lower ends of the rotating shaft, respectively. The elastic support assembly includes at least four elastic support units, which are evenly distributed at the four corners of the vibration platform body. Each elastic support unit includes a support base and an elastic element. The support base is fixed to the bottom surface of the vibration platform body by bolts. The elastic element is a helical compression spring, with its upper end connected to the support base and its lower end in contact with the foundation ground. The transmission connection mechanism is set between the vibration platform body and the grinding container to transmit the vibration of the vibration platform body to the grinding container.

[0005] The technical advantages of the vibration platform structure of the spherical graphite vibratory grinding machine provided by this utility model are as follows: Through the integrated design of the vibration platform body and the grinding container, combined with the composite vibration force generated by the eccentric wheel assembly of the vibration excitation device, the spherical graphite particles form a three-dimensional tumbling motion trajectory within the grinding container, significantly improving grinding efficiency and uniformity. The multi-point distributed support structure of the elastic support assembly effectively isolates the transmission of vibration to the foundation, while ensuring the stable operation of the vibration platform. The transmission connection mechanism achieves efficient transmission of vibration energy, avoids energy loss, and improves the overall grinding effect.

[0006] Based on the above technical solution, the vibration platform structure of the spherical graphite vibratory grinding machine of this utility model can be further improved as follows: The grinding container has multiple spiral ribs on its spherical inner wall. The spiral ribs are distributed spirally along the inner wall of the grinding container. The cross-section of the spiral ribs is trapezoidal, and the width of the upper base of the trapezoidal structure is smaller than the width of the lower base. The top of the grinding container is provided with a feed inlet, and a sealing cover is installed at the feed inlet by means of a threaded connection. A vent hole is opened at the center of the sealing cover.

[0007] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The spiral rib design creates a spiral flow-guiding structure on the inner wall of the grinding container, guiding the spherical graphite particles along a spiral trajectory, increasing the frequency and intensity of collisions between particles. The trapezoidal cross-section of the rib structure ensures the flow guidance effect while preventing particle accumulation at the ribs. The vent design of the sealing cover maintains the pressure balance inside the grinding container, preventing a decrease in grinding effect due to excessive sealing, while ensuring the safety of the grinding process.

[0008] Furthermore, the transmission connection mechanism includes a connecting flange and a buffer gasket. The connecting flange is an annular plate structure. The inner ring of the connecting flange is fixedly connected to the upper surface of the vibration platform body by a bolt group, and the outer ring of the connecting flange is fixedly connected to the bottom outer wall of the grinding container by a bolt group. The buffer gasket is disposed between the connecting flange and the bottom outer wall of the grinding container. The buffer gasket is made of rubber material and has a thickness of 5 mm to 15 mm.

[0009] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the annular plate structure of the connecting flange provides a rigid connection between the vibration platform body and the grinding container, ensuring the effective transmission of vibration energy. The buffer gasket absorbs part of the impact load while transmitting vibration, protecting the connecting components from damage caused by excessive stress. The rubber buffer gasket has good elasticity and damping characteristics, effectively extending the service life of the equipment while reducing operating noise.

[0010] Furthermore, both the main eccentric wheel and the secondary eccentric wheel of the eccentric wheel assembly are disc-shaped structures. The geometric center of the main eccentric wheel is offset from the axis of rotation by 20 mm to 40 mm, and the geometric center of the secondary eccentric wheel is offset from the axis of rotation by 15 mm to 35 mm. The mass of the main eccentric wheel is greater than that of the secondary eccentric wheel, and the phase angle difference between the main eccentric wheel and the secondary eccentric wheel is 90 degrees to 180 degrees, which is used to generate a composite vibration mode.

[0011] The beneficial effects of adopting the above-mentioned improved scheme are as follows: The different eccentricities of the main and secondary eccentric wheels generate differentiated excitation forces, forming a composite vibration mode, which causes the spherical graphite particles in the grinding container to produce more complex motion trajectories. The phase angle difference setting avoids the resonance phenomenon that may be caused by single-frequency vibration, improving the stability of vibration. The differentiated mass design allows for a reasonable distribution of the vibration force components in the vertical and horizontal directions, optimizing the grinding effect.

[0012] Furthermore, the damping control device includes a damper body and a damping adjustment mechanism. The damper body is a hydraulic cylinder structure. One end of the cylinder of the damper body is connected to the side of the vibration platform body through a hinge seat, and one end of the piston rod of the damper body is connected to a fixed bracket through a hinge seat. The damping adjustment mechanism includes an adjusting valve and a throttle orifice. The adjusting valve is installed on the side wall of the cylinder of the damper body, and the throttle orifice is located inside the piston for adjusting the magnitude of the damping force.

[0013] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the damper body of the hydraulic cylinder structure provides adjustable damping force, which can adjust the vibration characteristics according to different grinding process requirements. The hinged connection method allows the damper to adapt to the movement of the vibration platform, avoiding the constraint force that may be generated by rigid connection. The combined design of regulating valve and throttle orifice realizes precise control of damping force, improving the adaptability of equipment and the consistency of grinding quality.

[0014] Furthermore, the elastic element of the elastic support assembly is a conical helical spring, the large end diameter of which is 80 mm to 120 mm, the small end diameter is 40 mm to 60 mm, and the free length of the spring is 150 mm to 250 mm; the support base includes a base plate and a guide sleeve, the base plate has a circular structure, the guide sleeve is vertically fixed at the center of the base plate, the small end of the conical helical spring is embedded inside the guide sleeve, and the large end is in contact with the base plate.

[0015] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the variable stiffness characteristic of the conical helical spring allows the elastic support component to have different support stiffnesses under different amplitudes, providing a better vibration isolation effect. The design of the guide sleeve ensures the stable working state of the spring and prevents lateral displacement of the spring during vibration. The circular structure of the base plate provides a stable support foundation, matches the geometric characteristics of the conical spring, and optimizes the overall support performance.

[0016] Furthermore, the upper surface of the vibration platform body is provided with multiple positioning bosses. The positioning bosses have a cylindrical structure, and the height of the positioning bosses is 10 mm to 20 mm, and the diameter is 15 mm to 25 mm.

[0017] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the positioning boss provides a precise positioning reference for the grinding container and other accessories, ensuring the accuracy and repeatability of equipment assembly. The cylindrical structure of the positioning boss has good guiding performance, facilitating equipment installation and maintenance. Appropriate height and diameter dimensions ensure positioning accuracy while avoiding excessive stress concentration, thus improving the reliability of the vibration platform.

[0018] Furthermore, the bottom surface of the vibration platform body is provided with multiple reinforcing ribs, which are distributed in a cross shape and have a T-shaped cross-section.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the cross-shaped distribution of reinforcing ribs significantly improves the stiffness and strength of the vibration platform body, enabling it to withstand greater vibration loads without deformation. The T-shaped cross-section reinforcing rib structure reduces weight while ensuring strength, optimizing the dynamic characteristics of the vibration platform. The rational arrangement of the reinforcing ribs avoids stress concentration and improves the fatigue life of the vibration platform.

[0020] Furthermore, the outer surface of the grinding container is provided with heat dissipation fins, which are radially distributed and number from 8 to 16.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the radially distributed heat dissipation fins increase the heat dissipation surface area of ​​the grinding container, effectively reducing the impact of heat generated during the grinding process on the grinding quality. The reasonable design of the number of heat dissipation fins ensures heat dissipation effect while avoiding excessive weight increase. Good heat dissipation performance protects the physicochemical properties of spherical graphite and prevents material property degradation caused by overheating.

[0022] Furthermore, the positioning protrusions are distributed in a rectangular array on the upper surface of the vibration platform body, with a number of 4 to 8 protrusions and a spacing of 50 mm to 100 mm between adjacent positioning protrusions.

[0023] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the rectangular array of positioning bosses provides more stable and uniform positioning support, ensuring the positional stability of the grinding container during vibration. The reasonable number and spacing design satisfies the positioning accuracy requirements while avoiding stress concentration caused by excessive constraints. The arrayed arrangement of the positioning bosses improves the overall rigidity of the vibration platform and reduces deformation during vibration.

[0024] Compared with existing technologies, the beneficial effects of the vibration platform structure of the spherical graphite vibratory grinding machine provided by this utility model are as follows: This utility model achieves efficient transmission of vibration energy and three-dimensional tumbling motion of spherical graphite particles through the integrated connection design of the vibration platform body and the grinding container, combined with the composite vibration excitation generated by the eccentric wheel assembly. The elastic support component adopts a variable stiffness design with conical helical springs, which effectively isolates the transmission of vibration to the foundation while providing stable support, significantly reducing equipment operating noise and vibration impact. The hydraulic cylinder structure of the damping control device enables precise adjustment of the damping force, allowing the equipment to adapt to different grinding process requirements. The spiral rib design on the inner wall of the grinding container guides the particles to form a regular motion trajectory, improving grinding efficiency and product quality consistency. The radial distribution design of the heat dissipation fins effectively controls the temperature rise during the grinding process, protecting the physicochemical properties of the graphite material. The optimized design of the overall structure not only improves grinding efficiency but also extends the service life of the equipment and reduces maintenance costs. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the vibration platform structure of a spherical graphite vibratory grinding machine; Figure 2 This is a bottom schematic diagram of the vibration platform structure of a spherical graphite vibratory grinding machine; Figure 3 This is a cross-sectional view of the vibration platform structure of a spherical graphite vibratory grinding machine; The attached diagram lists the components represented by each number as follows: 1. Vibration platform body; 2. Vibration excitation device; 21. Vibration motor; 22. Eccentric wheel assembly; 3. Elastic support assembly; 31. Support base; 32. Elastic element; 4. Grinding container; 5. Transmission connection mechanism. Detailed Implementation

[0027] 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.

[0028] like Figures 1-3The diagram shows a first embodiment of the vibration platform structure of a spherical graphite vibratory grinder provided by this utility model. In this embodiment, it includes: a vibration platform body 1, a vibration excitation device 2, an elastic support assembly 3, a grinding container 4, a transmission connection mechanism 5, and a damping control device. The vibration platform body 1 is a rectangular plate structure. The grinding container 4 is fixedly installed in the central area of ​​the upper surface of the vibration platform body 1, and the grinding container 4 has a spherical cavity structure. The vibration excitation device 2 includes an excitation motor 21 and an eccentric wheel assembly 22. The excitation motor 21 is fixedly installed at the center of the bottom surface of the vibration platform body 1. The output shaft of the excitation motor 21 is coaxially connected to the rotating shaft of the eccentric wheel assembly 22. The wheel assembly 22 includes a main eccentric wheel and a secondary eccentric wheel, which are fixed to the upper and lower ends of the rotating shaft, respectively. The elastic support assembly 3 includes at least four elastic support units, which are evenly distributed at the four corners of the vibration platform body 1. Each elastic support unit includes a support base 31 and an elastic element 32. The support base 31 is fixedly connected to the bottom surface of the vibration platform body 1 by bolts. The elastic element 32 is a helical compression spring, with its upper end connected to the support base 31 and its lower end in contact with the foundation ground. The transmission connection mechanism 5 is set between the vibration platform body 1 and the grinding container 4 to transmit the vibration of the vibration platform body 1 to the grinding container 4.

[0029] In the above technical solution, the inner wall of the spherical cavity of the grinding container 4 is provided with multiple spiral ribs. The spiral ribs are distributed spirally along the inner wall of the grinding container 4. The cross-section of the spiral ribs is trapezoidal, and the width of the upper bottom surface of the trapezoidal structure is smaller than the width of the lower bottom surface. The top of the grinding container 4 is provided with a feed inlet. The feed inlet is fitted with a sealing cover plate by a threaded connection. A vent hole is opened at the center of the sealing cover plate.

[0030] Furthermore, in the above technical solution, the transmission connection mechanism 5 includes a connecting flange and a buffer gasket. The connecting flange is an annular plate structure. The inner ring of the connecting flange is fixedly connected to the upper surface of the vibration platform body 1 by a bolt group, and the outer ring of the connecting flange is fixedly connected to the bottom outer wall of the grinding container 4 by a bolt group. The buffer gasket is set between the connecting flange and the bottom outer wall of the grinding container 4. The buffer gasket is made of rubber material and the thickness of the buffer gasket is 5 mm to 15 mm.

[0031] Furthermore, in the above technical solution, both the main eccentric wheel and the secondary eccentric wheel of the eccentric wheel assembly 22 are disc-shaped structures. The geometric center of the main eccentric wheel is offset from the axis of rotation by 20 mm to 40 mm, and the geometric center of the secondary eccentric wheel is offset from the axis of rotation by 15 mm to 35 mm. The mass of the main eccentric wheel is greater than that of the secondary eccentric wheel, and the phase angle difference between the main eccentric wheel and the secondary eccentric wheel is 90 degrees to 180 degrees, which is used to generate a composite vibration mode.

[0032] Furthermore, in the above technical solution, the damping control device includes a damper body and a damping adjustment mechanism. The damper body is a hydraulic cylinder structure. One end of the cylinder of the damper body is connected to the side of the vibration platform body 1 through a hinge seat, and one end of the piston rod of the damper body is connected to a fixed bracket through a hinge seat. The damping adjustment mechanism includes an adjusting valve and a throttle orifice. The adjusting valve is installed on the side wall of the cylinder of the damper body, and the throttle orifice is located inside the piston for adjusting the magnitude of the damping force.

[0033] Furthermore, in the above technical solution, the elastic element 32 of the elastic support component 3 is a conical helical spring. The large end diameter of the conical helical spring is 80 mm to 120 mm, the small end diameter is 40 mm to 60 mm, and the free length of the spring is 150 mm to 250 mm. The support base 31 includes a base plate and a guide sleeve. The base plate has a circular structure, and the guide sleeve is vertically fixed at the center of the base plate. The small end of the conical helical spring is embedded inside the guide sleeve, and the large end is in contact with the base plate.

[0034] Furthermore, in the above technical solution, the upper surface of the vibration platform body 1 is provided with multiple positioning bosses. The positioning bosses have a cylindrical structure, and the height of the positioning bosses is 10 mm to 20 mm, and the diameter is 15 mm to 25 mm.

[0035] Furthermore, in the above technical solution, the bottom surface of the vibration platform body 1 is provided with multiple reinforcing ribs, which are distributed in a cross shape and have a T-shaped cross section.

[0036] Furthermore, in the above technical solution, the outer surface of the grinding container 4 is provided with heat dissipation fins, which are radially distributed and number 8 to 16.

[0037] Furthermore, in the above technical solution, the positioning bosses are distributed in a rectangular array on the upper surface of the vibration platform body 1, with a number of 4 to 8 positioning bosses and a spacing of 50 mm to 100 mm between adjacent positioning bosses.

[0038] The following is a specific embodiment 1 of this utility model: The vibration platform body of this embodiment is made of No. 45 steel, and its overall dimensions are a rectangular plate structure with a length of 1200 mm, a width of 800 mm, and a thickness of 50 mm. The upper surface of the vibration platform body is precision machined, and the surface roughness is controlled within Ra 1.6 micrometers to ensure the fitting accuracy with the grinding container. 120 mm diameter circular holes are respectively opened at the four corners of the vibration platform body for installing elastic support components. The bottom surface of the vibration platform body is provided with a cross-shaped reinforcing rib structure, with a height of 40 mm and a thickness of 20 mm, and a T-shaped cross-section design, which effectively improves the bending stiffness of the platform. The grinding container is made of 304 stainless steel, with a spherical structure with an outer diameter of 600 mm and a wall thickness of 8 mm. The inner wall of the grinding container is provided with 8 spiral ribs, each with a height of 15 mm, a spiral helix angle of 30 degrees, and a cross-section of an isosceles trapezoid with an upper base width of 10 mm, a lower base width of 20 mm, and a height of 15 mm. The grinding container has a 150mm diameter feed inlet at the top, equipped with a 10mm thick stainless steel sealing cover with an 8mm diameter vent in the center. The vibration excitation device uses a three-phase asynchronous motor with a power of 7.5 kW and a speed range of 500-3000 rpm, infinitely variable via a frequency converter. The main eccentric wheel has a diameter of 300mm, a thickness of 50mm, an eccentricity of 30mm, and a weight of 25kg. The secondary eccentric wheel has a diameter of 250mm, a thickness of 40mm, an eccentricity of 25mm, and a weight of 18kg. The main and secondary eccentric wheels are fixed to the output shaft of the vibration motor via a key connection, with a phase difference of 120 degrees. The elastic support assembly uses a conical helical spring with a large end diameter of 100mm, a small end diameter of 50mm, a free length of 200mm, a spring wire diameter of 8mm, 12 effective turns, and a spring constant of 120 N / mm. The support base is made of cast iron, with a base plate diameter of 180 mm and a thickness of 30 mm. The guide sleeve has an inner diameter of 55 mm and a height of 80 mm. The connecting flange of the transmission connection mechanism is made of aluminum alloy, with an inner ring diameter of 400 mm, an outer ring diameter of 650 mm, and a thickness of 25 mm. It is connected to the vibration platform and grinding container using 24 M12 bolts. The buffer gasket is made of fluororubber, with a thickness of 10 mm and a Shore A hardness of 75. The damper body of the damping control device is a double-acting hydraulic cylinder with a cylinder diameter of 80 mm, a stroke of 150 mm, and a working pressure of 16 MPa. The regulating valve is a proportional regulating valve with a flow rate adjustment range of 0.5 liters per minute to 20 liters per minute. When the equipment is running, the graphite particles in the grinding container undergo three-dimensional tumbling motion under the combined vibration, significantly increasing the collision frequency between particles and improving the grinding efficiency by more than 40% compared to the traditional single vibration method. The design of the heat dissipation fins keeps the temperature rise during the grinding process below 50 degrees Celsius, effectively protecting the structural stability of the graphite material.

[0039] The following is another specific embodiment 2 of this utility model: This embodiment 2 is based on embodiment 1, and the vibration excitation device has been improved and optimized. A third eccentric wheel is added to the main and secondary eccentric wheels to form a triple eccentric vibration system. The third eccentric wheel has a diameter of 200 mm, a thickness of 30 mm, an eccentricity of 20 mm, a mass of 12 kg, a phase difference of 240 degrees with the main eccentric wheel, and a phase difference of 120 degrees with the secondary eccentric wheel. This triple eccentric design produces a more complex vibration trajectory, making the graphite particles in the grinding container move more fully and collide more frequently. At the same time, the spiral ribs on the inner wall of the grinding container have been optimized, increasing the number from 8 to 12, adjusting the spiral helix angle to 25 degrees, and adjusting the rib height to 12 mm. The increased number of ribs makes the particle guiding effect more obvious and the movement trajectory more regular. The elastic support assembly has also been adjusted accordingly, adopting a variable-pitch conical helical spring with a pitch of 25 mm at the large end and 15 mm at the small end. This variable-pitch design makes the spring's stiffness characteristics more ideal, providing optimal support performance under different working conditions. The damping control device has added automatic control functionality, automatically adjusting the damping force based on vibration sensor detection of vibration amplitude, ensuring the equipment always operates at its optimal state. This improved design further enhances grinding efficiency, significantly improving the sphericity and particle size distribution uniformity of the product, making it particularly suitable for the production and processing of high-precision spherical graphite.

[0040] The following is another specific embodiment 3 of this utility model: Embodiment 3 is based on Embodiment 1, with special optimization of the grinding container and heat dissipation system. The grinding container adopts a double-layer structure design, with the outer layer made of 304 stainless steel and the inner layer made of silicon carbide ceramic material. A 5 mm gap is left between the two layers for the passage of cooling medium. The inner ceramic layer has excellent wear resistance and chemical stability, and can withstand long-term impact grinding of graphite particles without wear, avoiding the introduction of metal impurities. The spiral ribs on the inner wall of the ceramic are made by precision forming process, with high surface smoothness and better air conduction effect. The heat dissipation system adopts a forced circulation cooling method. A cooling water jacket is set on the outer wall of the grinding container. The cooling water is forced to circulate in the water jacket by a circulation pump, carrying away the heat generated during the grinding process. The cooling system is equipped with a temperature control device, which can control the grinding temperature within 30 degrees Celsius, providing ideal process conditions for the processing of temperature-sensitive graphite materials. The vibration platform body now features eight positioning bosses arranged in a 3x3 square array minus the center position. Each boss is equipped with a precision positioning pin to ensure accurate and reliable installation of the grinding container. The transmission connection mechanism employs a flexible connection method, adding flexible transmission elements to the rigid flange connection. This ensures efficient vibration transmission while mitigating stress concentration issues that may arise from rigid connections. This design is particularly suitable for processing fine spherical graphite and high-purity graphite materials, guaranteeing high grinding efficiency while ensuring high product quality and purity, meeting the stringent requirements of high-end lithium battery anode materials.

[0041] Specifically, the principle of this invention is as follows: the vibration platform body serves as the carrier of the entire system, forming a rigid connection with the spherical grinding container through a transmission connection mechanism to ensure the effective transmission of vibration energy. The vibration excitation device adopts a differentiated design of main and auxiliary eccentric wheels. The main eccentric wheel generates the primary excitation force, while the auxiliary eccentric wheel generates the auxiliary excitation force. The two have a phase difference, forming a composite vibration mode. This composite vibration causes the graphite particles in the grinding container to not only undergo vertical jumping motion but also horizontal sliding and rolling, forming a three-dimensional motion trajectory, greatly increasing the collision frequency and the diversity of collision angles between particles. The spiral ribs on the inner wall of the grinding container act as guides, directing the particles along the spiral path, avoiding disorderly accumulation of particles within the container, and improving the uniformity of grinding. The elastic support component uses the variable stiffness characteristics of a conical helical spring, providing greater support stiffness to ensure stability at small amplitudes, and reducing stiffness at large amplitudes to provide better vibration isolation. The damping control device dissipates vibration energy through hydraulic damping, preventing excessive amplitude and resonance in the system. Simultaneously, the damping force can be adjusted according to process requirements, achieving precise control of vibration characteristics. The heat dissipation fins control temperature rise during the grinding process by increasing the heat dissipation area, preventing structural changes or performance degradation of graphite particles due to overheating. Through the coordinated operation of its components, the entire system achieves efficient, stable, and controllable spherical graphite grinding.

[0042] The specific operation or use method of this utility model is as follows: First, install and debug the equipment. Install the vibration platform body on the foundation ground through the elastic support assembly, ensuring that the force on each support point is uniform. Connect the power supply of the vibration excitation device and adjust the phase angle of the eccentric wheel assembly so that the main and auxiliary eccentric wheels reach the phase difference required by the design. Install the damping control device and set the initial damping force value through the regulating valve. Fix the spherical grinding container on the vibration platform body and check the tightness of the transmission connection mechanism. When starting the operation, first add the graphite raw material to be ground into the grinding container according to the specified filling coefficient. The filling amount is generally controlled between 60% and 80% of the container volume. Cover the sealing cover to ensure good sealing performance while keeping the vent hole unobstructed. Start the vibration excitation device and gradually adjust it to the working frequency, generally controlled between 1500 rpm and 3000 rpm. Observe the operating status of the vibration platform and adjust the damping force of the damping control device according to the grinding effect. During the grinding process, the vibration amplitude and temperature changes of the equipment should be checked regularly. If any abnormality is found, the machine should be stopped immediately for inspection. After grinding is complete, reduce the vibration frequency and wait until the equipment has completely stopped before opening the sealing cover to remove the product. The entire operation must be carried out strictly in accordance with safety operating procedures to ensure the safety of personnel and equipment. After the equipment is shut down, it must be cleaned and maintained, removing any residual materials and checking the tightness of all connections to prepare for the next use.

Claims

1. A vibration platform structure for a spherical graphite vibratory grinding machine, characterized in that, include: The vibration platform comprises a vibration excitation device, an elastic support assembly, a grinding container, a transmission connection mechanism, and a damping control device. The vibration platform body is a rectangular plate structure. A grinding container, shaped like a spherical cavity, is fixedly installed in the central area of ​​the upper surface of the vibration platform body. The vibration excitation device includes an excitation motor and an eccentric wheel assembly. The excitation motor is fixedly installed at the center of the bottom surface of the vibration platform body, and its output shaft is coaxially connected to the rotating shaft of the eccentric wheel assembly. The eccentric wheel assembly includes a main eccentric wheel and a secondary eccentric wheel, which are respectively fixed to the upper and lower ends of the rotating shaft. The elastic support assembly includes at least four elastic support units evenly distributed at the four corners of the vibration platform body. Each elastic support unit includes a support base and an elastic element. The support base is fixedly connected to the bottom surface of the vibration platform body by bolts. The elastic element is a helical compression spring, with its upper end connected to the support base and its lower end in contact with the foundation ground. The transmission connection mechanism is located between the vibration platform body and the grinding container, used to transmit the vibration of the vibration platform body to the grinding container.

2. The vibration platform structure of a spherical graphite vibratory grinding machine according to claim 1, characterized in that, The spherical cavity of the grinding container has multiple spiral ribs on its inner wall. The spiral ribs are distributed spirally along the inner wall of the grinding container. The cross-section of the spiral ribs is trapezoidal, and the width of the upper base of the trapezoidal structure is smaller than the width of the lower base. The top of the grinding container is provided with a feed inlet, and a sealing cover is installed at the feed inlet by means of a threaded connection. A vent hole is opened at the center of the sealing cover.

3. The vibration platform structure of a spherical graphite vibratory grinding machine according to claim 2, characterized in that, The transmission connection mechanism includes a connecting flange and a buffer gasket. The connecting flange is an annular plate structure. The inner ring of the connecting flange is fixedly connected to the upper surface of the vibration platform body by a bolt group, and the outer ring of the connecting flange is fixedly connected to the bottom outer wall of the grinding container by a bolt group. The buffer gasket is set between the connecting flange and the bottom outer wall of the grinding container. The buffer gasket is made of rubber material and has a thickness of 5 mm to 15 mm.

4. The vibration platform structure of a spherical graphite vibratory grinding machine according to claim 3, characterized in that, Both the main eccentric wheel and the secondary eccentric wheel of the eccentric wheel assembly are disc-shaped structures. The geometric center of the main eccentric wheel is offset from the axis of rotation by 20 mm to 40 mm, and the geometric center of the secondary eccentric wheel is offset from the axis of rotation by 15 mm to 35 mm. The mass of the main eccentric wheel is greater than that of the secondary eccentric wheel, and the phase angle difference between the main eccentric wheel and the secondary eccentric wheel is 90 degrees to 180 degrees, which is used to generate a composite vibration mode.

5. The vibration platform structure of a spherical graphite vibratory grinding machine according to claim 4, characterized in that, The damping control device includes a damper body and a damping adjustment mechanism. The damper body is a hydraulic cylinder structure. One end of the cylinder of the damper body is connected to the side of the vibration platform body through a hinge seat, and one end of the piston rod of the damper body is connected to a fixed bracket through a hinge seat. The damping adjustment mechanism includes an adjusting valve and a throttle orifice. The adjusting valve is installed on the side wall of the cylinder of the damper body, and the throttle orifice is located inside the piston for adjusting the magnitude of the damping force.

6. The vibration platform structure of a spherical graphite vibratory grinding machine according to claim 5, characterized in that, The elastic element of the elastic support assembly is a conical helical spring. The large end diameter of the conical helical spring is 80 mm to 120 mm, the small end diameter is 40 mm to 60 mm, and the free length of the spring is 150 mm to 250 mm. The support base includes a base plate and a guide sleeve. The base plate has a circular structure, and the guide sleeve is vertically fixed at the center of the base plate. The small end of the conical helical spring is embedded inside the guide sleeve, and the large end is in contact with the base plate.

7. The vibration platform structure of a spherical graphite vibratory grinding machine according to claim 6, characterized in that, The upper surface of the vibration platform body is provided with multiple positioning bosses. The positioning bosses have a cylindrical structure, and the height of the positioning bosses is 10 mm to 20 mm and the diameter is 15 mm to 25 mm.

8. The vibration platform structure of a spherical graphite vibratory grinding machine according to claim 7, characterized in that, The bottom surface of the vibration platform body is provided with multiple reinforcing ribs, which are distributed in a cross shape and have a T-shaped cross-section.

9. The vibration platform structure of a spherical graphite vibratory grinding machine according to claim 8, characterized in that, The outer surface of the grinding container is provided with heat dissipation fins, which are radially distributed and number from 8 to 16.

10. The vibration platform structure of a spherical graphite vibratory grinding machine according to claim 9, characterized in that, The positioning bosses are distributed in a rectangular array on the upper surface of the vibration platform body. The number of positioning bosses is 4 to 8, and the spacing between adjacent positioning bosses is 50 mm to 100 mm.

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