Vibration structure of a spherical graphite vibratory grinding device

Abstract

This utility model provides a vibration structure for a spherical graphite vibratory grinding device, belonging to the technical field of spherical graphite vibratory grinding devices. The vibration structure includes: a vibratory body, a vibration excitation device, a support base, a transmission shaft, an adjustment mechanism, and a sealing cover. The vibratory body is cylindrical, with a spherical grinding cavity inside, the inner wall of which is made of stainless steel. The support base is fixedly mounted on the ground, and its upper surface is connected to the bottom of the vibratory body via a shock-absorbing spring assembly. The vibration excitation device includes an eccentric wheel and a drive motor, which is fixedly mounted on the side wall of the support base. The output shaft of the drive motor is connected to the transmission shaft via a coupling. This invention solves the technical problems of uneven grinding, poor vibration control accuracy, and insufficient equipment stability in existing spherical graphite grinding devices.

Description

Technical Field

[0001] This utility model belongs to the technical field of spherical graphite vibration grinding device, specifically, it relates to a vibration structure of a spherical graphite vibration grinding device. Background Technology

[0002] Spherical graphite, as a crucial component of anode materials for new energy batteries, directly impacts battery performance and lifespan due to its surface smoothness and sphericity. Grinding is a critical process in spherical graphite production, with traditional methods relying on mechanical ball mills and air jet mills. Mechanical ball mills grind graphite through the impact and friction of the grinding media, but suffer from uneven grinding, high energy consumption, and high noise levels. This is particularly problematic for materials like spherical graphite, which require extremely high surface quality; traditional ball mills struggle to achieve ideal grinding results. While air jet mills can achieve good pulverization, they are complex, energy-intensive, and have limited ability to maintain the shape of spherical graphite. Vibratory grinding, as an emerging method, uses vibration to create complex motion trajectories between the grinding media and the material being ground. It boasts advantages such as high grinding efficiency, low energy consumption, and low noise, leading to its increasingly widespread application in powder processing. However, existing vibratory grinding equipment still suffers from technical defects when used for spherical graphite grinding, including insufficient vibration control precision, unreasonable grinding chamber structure design, and poor equipment stability. This results in unstable grinding quality, failing to meet the quality requirements of high-end spherical graphite products. Therefore, there is an urgent need to develop a vibration grinding device specifically designed for the characteristics of spherical graphite to solve the problems existing in the current technology. Utility Model Content

[0003] In view of this, the present invention provides a vibration structure for a spherical graphite vibratory grinding device, which can solve the technical problems of uneven grinding, poor vibration control accuracy, and insufficient equipment stability in existing spherical graphite grinding devices.

[0004] This utility model is implemented as follows: This utility model provides a vibration structure for a spherical graphite vibratory grinding device, comprising: a vibratory body, a vibration excitation device, a support base, a transmission shaft, an adjustment mechanism, and a sealing cover; the vibratory body is cylindrical, and a spherical grinding cavity is provided inside the vibratory body, the inner wall of which is made of stainless steel; the support base is fixedly installed on the ground, and the upper surface of the support base is connected to the bottom of the vibratory body through a shock-absorbing spring assembly; the vibration excitation device includes an eccentric wheel and a drive motor, the drive motor is fixedly installed on the side wall of the support base, the output shaft of the drive motor is connected to the transmission shaft through a coupling, and the upper end of the transmission shaft is fixedly connected to the eccentric wheel, which is located inside the vibratory body and maintains a clearance fit with the inner wall of the vibratory body; the adjustment mechanism includes an adjustment screw and an adjustment handle, one end of the adjustment screw is threaded to the support base, the other end of the adjustment screw is connected to the side wall of the vibratory body through a ball joint, and the adjustment handle is fixed in the middle of the adjustment screw; the sealing cover is fixed to the top of the vibratory body by a bolt assembly, and a feed port is provided at the center of the sealing cover.

[0005] The technical advantages of the vibration structure of the spherical graphite vibratory grinding device provided by this utility model are as follows: By setting a spherical grinding cavity inside the vibratory machine body and cooperating with the vibration force generated by the eccentric wheel, the spherical graphite forms a three-dimensional motion trajectory within the grinding cavity, achieving uniform grinding of the graphite surface; the shock-absorbing spring assembly effectively isolates the transmission of vibration to the support base, reducing equipment operating noise; the adjustment mechanism achieves precise adjustment of the vibration amplitude through the cooperation of the screw and ball joint, meeting different grinding requirements; the sealing cover ensures the airtightness of the grinding process, preventing graphite dust leakage; the overall structure is compact and reasonable, and the grinding efficiency is significantly improved.

[0006] Based on the above technical solution, the vibration structure of the spherical graphite vibratory grinding device of this utility model can be further improved as follows: The shock-absorbing spring assembly includes an upper spring seat, a lower spring seat, and a helical spring. The lower spring seat is fixed to the upper surface of the support base, the upper spring seat is fixed to the bottom of the vibrating machine body, and the two ends of the helical spring are connected to the upper spring seat and the lower spring seat respectively. The helical spring is made of carbon steel, and at least four helical springs are evenly distributed along the circumference of the bottom of the vibrating machine body.

[0007] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: The shock-absorbing spring assembly adopts a three-layer structure design of upper and lower spring seats and helical springs. The vibration energy is absorbed by the elastic deformation of carbon steel helical springs, which effectively reduces the transmission of vibration to the support base. The helical springs are evenly distributed along the circumference to ensure that the vibration body is subjected to balanced forces in all directions, avoid tilting or offset during equipment operation, improve the stability and service life of equipment operation, and reduce maintenance costs.

[0008] Furthermore, the drive shaft is rotatably mounted at the bottom center of the vibratory body via a bearing assembly; the bearing assembly includes a bearing housing and a deep groove ball bearing, the bearing housing is fixed to the bottom inner wall of the vibratory body, the deep groove ball bearing is installed inside the bearing housing, and the drive shaft passes through the deep groove ball bearing and is connected by a key to achieve power transmission; the bearing housing is made of cast iron.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the drive shaft achieves stable rotation within the vibrating machine body through the bearing assembly; the deep groove ball bearing bears the radial load and ensures the smooth operation of the drive shaft; the bearing housing is made of cast iron to provide sufficient strength and wear resistance; the key connection method ensures the reliability and accuracy of power transmission and avoids slippage during transmission; the reasonable design of the bearing assembly extends the service life of the transmission system, reduces the failure rate, and ensures continuous and stable operation of the equipment.

[0010] Furthermore, the eccentricity of the eccentric wheel is in the range of 5 mm to 15 mm, and the ratio of the outer diameter of the eccentric wheel to the inner diameter of the spherical grinding cavity is between 0.3 and 0.7; the eccentric wheel is fixedly connected to the upper end of the drive shaft through a keyway, and the material of the eccentric wheel is alloy steel; the outer surface of the eccentric wheel is provided with multiple arc-shaped protrusions, which are evenly distributed along the circumference of the eccentric wheel.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the eccentricity of the eccentric wheel is controlled within a reasonable range, generating appropriate vibration amplitude and frequency, so that the graphite particles form an ideal motion state in the grinding chamber; the ratio design of the outer diameter of the eccentric wheel to the inner diameter of the grinding chamber ensures sufficient grinding space and effective grinding contact; the alloy steel material provides excellent wear resistance and strength; the arc-shaped protrusions on the outer surface increase the contact area with graphite, improve the grinding effect, and at the same time, the uniform distribution of the protrusions ensures the balance of the grinding process.

[0012] Furthermore, the diameter of the spherical grinding chamber is in the range of 100 mm to 300 mm, and the wall thickness of the spherical grinding chamber is in the range of 10 mm to 20 mm; a discharge port is provided at the lowest point of the spherical grinding chamber, and the discharge port is controlled to open and close by a ball valve; the valve body of the ball valve is made of stainless steel.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the diameter and wall thickness of the spherical grinding chamber are designed to balance grinding capacity and structural strength, meeting the grinding requirements of different batches of graphite; the spherical structure eliminates dead corners, allowing graphite particles to form a continuous flow state in the chamber; the discharge port is located at the lowest point to achieve smooth discharge of graphite by utilizing gravity; the ball valve control system provides reliable opening and closing functions, the stainless steel material ensures corrosion resistance and service life, and the overall design improves production efficiency and product quality.

[0014] Furthermore, three adjusting screws are evenly distributed along the circumference of the support base, and each adjusting screw is locked to the support base by a nut; the adjusting screws are made of carbon steel and the threads of the adjusting screws are trapezoidal threads; the ball joint includes a ball head and a ball socket, the ball head is fixed to the top of the adjusting screw, and the ball socket is fixed to the side wall of the vibrating machine body.

[0015] The beneficial effects of adopting the above-mentioned improved scheme are as follows: the equidistant distribution design of the three adjusting screws ensures three-point stable support of the vibratory body, and the precise adjustment and fixation of the position is achieved by locking with nuts; the trapezoidal thread provides good self-locking performance and transmission efficiency; the carbon steel material ensures sufficient strength and durability; the ball joint connection allows the vibratory body to compensate for angles during the adjustment process, avoids stress concentration, improves connection reliability, and achieves precise control of vibration parameters and long-term stable operation of the equipment.

[0016] Furthermore, the outer wall of the vibrating body is cylindrical, and the outer surface of the vibrating body is provided with heat dissipation ribs, which extend along the axial direction of the vibrating body and are evenly distributed along the circumference.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the cylindrical outer wall structure of the vibratory machine body provides good structural strength and manufacturability; the heat dissipation fins set on the outer surface significantly increase the heat dissipation area, effectively reduce the temperature of the equipment during operation, and prevent equipment damage and performance degradation caused by overheating; the design of the heat dissipation fins extending along the axial direction and being evenly distributed around the circumference ensures the uniformity of heat dissipation, avoids local overheating, extends the service life of the equipment, and ensures the stability and consistency of the grinding process.

[0018] Furthermore, the inner wall surface of the spherical grinding cavity is provided with a spiral groove, the depth of which is in the range of 2 mm to 5 mm, and the pitch of which is in the range of 20 mm to 40 mm.

[0019] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the spiral groove design of the inner wall of the spherical grinding chamber creates a complex inner surface geometry, increases the contact area and friction between graphite particles and the chamber wall, and improves grinding efficiency; the spiral structure guides the graphite particles to form a spiral motion trajectory, increases the grinding path length, and makes the graphite surface more fully and uniformly ground; the reasonable design of groove depth and pitch balances the grinding effect and structural strength, and avoids over-grinding and equipment wear.

[0020] Furthermore, the support base has a square base plate structure, and the four corners of the support base are respectively provided with anchor bolt holes, the diameter of which is in the range of 12 mm to 20 mm.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the support base adopts a square base plate structure to provide a stable support area and good anti-overturning ability; the anchor bolt holes set at the four corners realize the reliable fixation of the equipment to the ground and effectively transmit the vibration force and working load generated during the operation of the equipment; the reasonable design of the diameter of the anchor bolt holes ensures the strength and reliability of the bolt connection; the symmetry of the square structure ensures the accuracy and stability of the equipment installation and improves the overall working accuracy of the equipment.

[0022] Furthermore, the sealing cap has a circular raised structure, and the central part of the sealing cap protrudes upward to form a conical structure, with the apex angle of the conical structure ranging from 60 degrees to 90 degrees.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: the circular protrusion structure of the sealing cap increases the internal volume, providing more space for graphite particles to move; the design of the central conical structure guides the graphite particles to converge towards the center, avoiding particle accumulation at the top and ensuring the continuity of the grinding process; the reasonable design of the conical apex balances the increase in volume and structural strength, avoiding stress concentration, while the conical structure facilitates the rapid falling of graphite during the feeding process, improving feeding efficiency and the uniformity of the grinding process.

[0024] Compared with existing technologies, the beneficial effects of the vibration structure of the spherical graphite vibratory grinding device provided by this utility model are as follows: This utility model, through the setting of a spherical grinding chamber within the vibratory machine body and the coordination of an eccentric wheel vibration excitation device, realizes the composite motion of graphite particles in three-dimensional space, significantly improving grinding uniformity and efficiency. The multi-point support design of the shock-absorbing spring assembly effectively isolates vibration transmission, reducing equipment operating noise and foundation requirements. The adjustment mechanism adopts a precise fit between a screw and a ball joint to achieve precise control of vibration amplitude and frequency, meeting the grinding needs of graphite of different specifications. The transmission shaft achieves stable transmission through a bearing assembly, ensuring the reliability of long-term continuous operation. The spiral groove design on the inner wall of the spherical grinding chamber increases the grinding contact area and improves grinding efficiency. The overall structure is compact and reasonable, and operation and maintenance are simple. Compared with existing technologies, it has significant improvements in grinding quality, equipment stability, and energy consumption control, providing an efficient and reliable technical solution for the industrial production of spherical graphite. 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 A schematic diagram of the vibration structure of a spherical graphite vibratory grinding device; Figure 2 This is a schematic diagram of the shock-absorbing spring assembly. The attached diagram lists the components represented by each number as follows: 10. Vibrating body; 20. Vibration excitation device; 30. Support base; 40. Drive shaft; 50. Adjustment mechanism; 60. Sealing cover. 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 Figure 1-2 The diagram shows a structural schematic of the vibration structure of a spherical graphite vibratory grinding device provided by this utility model. The device includes: a vibratory body 10, a vibration excitation device 20, a support base 30, a transmission shaft 40, an adjustment mechanism 50, and a sealing cover 60. The vibratory body is cylindrical, and a spherical grinding cavity is provided inside the vibratory body. The inner wall of the spherical grinding cavity is made of stainless steel. The support base is fixedly set on the ground, and its upper surface is connected to the bottom of the vibratory body through a shock-absorbing spring assembly. The vibration excitation device includes an eccentric wheel and a drive motor. The machine is fixedly mounted on the side wall of the support base. The output shaft of the drive motor is connected to the transmission shaft through a coupling. An eccentric wheel is fixedly connected to the upper end of the transmission shaft. The eccentric wheel is located inside the vibrating machine body and maintains a clearance fit with the inner wall of the vibrating machine body. The adjustment mechanism includes an adjustment screw and an adjustment handle. One end of the adjustment screw is threaded to the support base, and the other end of the adjustment screw is connected to the side wall of the vibrating machine body through a ball joint. The adjustment handle is fixed in the middle of the adjustment screw. The sealing cover is fixed to the top of the vibrating machine body by a bolt assembly. A feed port is opened at the center of the sealing cover.

[0029] In the above technical solution, the shock-absorbing spring assembly includes an upper spring seat, a lower spring seat, and a helical spring; the lower spring seat is fixed on the upper surface of the support base, the upper spring seat is fixed on the bottom of the vibrating machine body, and the two ends of the helical spring are connected to the upper spring seat and the lower spring seat respectively; the helical spring is made of carbon steel, and at least four helical springs are evenly distributed along the circumference of the bottom of the vibrating machine body.

[0030] Furthermore, in the above technical solution, the drive shaft is rotatably mounted at the bottom center of the vibratory body via a bearing assembly; the bearing assembly includes a bearing housing and a deep groove ball bearing, the bearing housing is fixed on the bottom inner wall of the vibratory body, the deep groove ball bearing is installed inside the bearing housing, the drive shaft passes through the deep groove ball bearing and is connected by a key to achieve power transmission; the bearing housing is made of cast iron.

[0031] Furthermore, in the above technical solution, the eccentricity of the eccentric wheel is in the range of 5 mm to 15 mm, and the ratio of the outer diameter of the eccentric wheel to the inner diameter of the spherical grinding cavity is between 0.3 and 0.7; the eccentric wheel is fixedly connected to the upper end of the transmission shaft through a keyway, and the material of the eccentric wheel is alloy steel; the outer surface of the eccentric wheel is provided with multiple arc-shaped protrusions, which are evenly distributed along the circumference of the eccentric wheel.

[0032] Furthermore, in the above technical solution, the diameter of the spherical grinding chamber is in the range of 100 mm to 300 mm, and the wall thickness of the spherical grinding chamber is in the range of 10 mm to 20 mm; the lowest point of the spherical grinding chamber is provided with a discharge port, which is controlled to open and close by a ball valve; the valve body of the ball valve is made of stainless steel.

[0033] Furthermore, in the above technical solution, three adjusting screws are evenly distributed along the circumference of the support base, and each adjusting screw is locked to the support base by a nut; the adjusting screw is made of carbon steel, and the thread of the adjusting screw is a trapezoidal thread; the ball joint includes a ball head and a ball socket, the ball head is fixed to the top of the adjusting screw, and the ball socket is fixed to the side wall of the vibrating machine body.

[0034] Furthermore, in the above technical solution, the outer wall of the vibrating body is cylindrical, and the outer surface of the vibrating body is provided with heat dissipation fins, which extend along the axial direction of the vibrating body and are evenly distributed along the circumference.

[0035] Furthermore, in the above technical solution, the inner wall surface of the spherical grinding cavity is provided with a spiral groove, the depth of the spiral groove is in the range of 2 mm to 5 mm, and the pitch of the spiral groove is in the range of 20 mm to 40 mm.

[0036] Furthermore, in the above technical solution, the support base has a square base plate structure, and the four corners of the support base are respectively provided with anchor bolt holes, the diameter of which is in the range of 12 mm to 20 mm.

[0037] Furthermore, in the above technical solution, the sealing cap has a circular raised structure, and the central part of the sealing cap protrudes upward to form a conical structure, with the apex angle of the conical structure ranging from 60 degrees to 90 degrees.

[0038] The following is a specific embodiment 1 of this utility model: In this embodiment, the vibrating body is made of high-quality carbon steel, with an outer diameter of 400 mm, a height of 600 mm, and a wall thickness of 15 mm. The internal spherical grinding cavity has a diameter of 200 mm and is made of 316 stainless steel. The surface is precision polished, and the roughness is controlled within Ra0.8. The inner wall of the grinding cavity is machined with spiral grooves, the groove depth is 3 mm, the pitch is 30 mm, and a total of 8 spiral lines are set, evenly distributed on the spherical surface. The support base is made of cast iron, with dimensions of 800 mm × 800 mm × 200 mm, and M16 anchor bolt holes are set at the four corners. The shock-absorbing spring assembly includes 6 helical springs, with an outer diameter of 60 mm, a wire diameter of 8 mm, an effective number of 12 turns, and is made of 60Si2MnA spring steel. The upper and lower spring seats are made of No. 45 steel and are heat-treated to achieve a hardness of HRC40-45. The drive shaft is made of 40Cr alloy steel, with a diameter of 50 mm and a length of 500 mm, and its surface has undergone quenching and tempering treatment. The eccentric wheel is made of 42CrMo alloy steel, with an outer diameter of 120 mm, an eccentricity of 10 mm, and 12 arc-shaped protrusions machined on its outer surface, each protrusion being 2 mm high. The bearing assembly uses deep groove ball bearings 6210, and the bearing housing is made of HT200 gray cast iron. The drive motor is a YE3 series three-phase asynchronous motor with a power of 7.5 kW and a speed of 1440 rpm, controlled by a frequency converter. The coupling uses a flexible pin coupling, compensating for radial displacement of 2 mm and angular displacement of 1 degree. The adjusting screw of the adjusting mechanism uses a trapezoidal thread, with a screw diameter of M24, made of 45# steel, and galvanized for corrosion protection. The ball joint uses a GE25ES spherical plain bearing with a load capacity of 45 kN. The sealing cover is made of aluminum alloy, with a thickness of 10 mm and a central conical structure with a 75-degree apex angle. The discharge port ball valve is a stainless steel flange ball valve with a nominal diameter of DN50. The entire set of equipment operates smoothly under rated conditions, with vibration amplitude controlled within 5 mm and noise level below 75 decibels. It can process 50 kg of spherical graphite in a single grinding cycle, improving the sphericity of the graphite by 15% and surface smoothness by 20%, meeting the technical requirements of high-end lithium battery anode materials. The equipment has strong continuous operation capability, with a daily processing capacity of up to 600 kg, energy consumption reduced by 30% compared to traditional ball mills, and maintenance intervals extended to once every 6 months.

[0039] The following is another specific embodiment 2 of this utility model: Embodiment 2 is based on Embodiment 1, with improvements and optimizations to the shock-absorbing spring assembly. The original 6 helical springs are increased to 8, and the helical springs are evenly distributed at 45 degrees along the bottom circumference of the vibrating machine body, further improving the shock absorption effect and support stability. Simultaneously, rubber shock-absorbing pads are added to the outside of the helical springs. The shock-absorbing pads are made of nitrile rubber with a Shore A hardness of 70 and a thickness of 20 mm. The rubber shock-absorbing pads work in parallel with the springs. During low-frequency vibration, the springs mainly bear the load, while during high-frequency vibration, the rubber shock-absorbing pads play a damping role, effectively attenuating vibration transmission. To accommodate the increased number of springs, the structure of the spring seat is adjusted accordingly, adopting a ring-shaped spring seat design. The diameter of the upper spring seat is increased to 500 mm, the thickness is increased to 30 mm, and the material is changed to 40Cr alloy steel with surface hardening treatment. The lower spring seat is bolted to the support base, with M12 bolts and a connection strength grade of 8.8. The improved vibration damping system reduces vibration transmission rate by 40% and vibration acceleration of equipment foundation by 50% under the same excitation force, significantly improving the equipment's environmental adaptability. Simultaneously, the enhanced damping effect allows the equipment to operate at higher speeds, further increasing grinding efficiency by 25%, making it particularly suitable for production workshops and urban factories with strict noise control requirements. After 3000 hours of continuous operation testing, the improved vibration damping system demonstrated excellent durability and reliability, extending spring fatigue life to 2 million cycles, rubber damping pad life to 18 months, and reducing overall maintenance costs by 35%.

[0040] The following is another specific embodiment 3 of this utility model: Embodiment 3 is based on Embodiment 1, with an innovative design of the inner wall structure of the spherical grinding cavity. Based on the original spiral groove, radially distributed convex ribs are added. The ribs are 1.5 mm high and 5 mm wide, with 12 ribs arranged radially along the grinding cavity, forming a grid-like surface texture with the spiral groove. This composite surface structure further increases the complexity of graphite particle movement, allowing the particles to achieve sufficient grinding action in both the radial and circumferential directions. Simultaneously, a replaceable grinding liner is provided at the bottom of the grinding cavity. The liner is made of tungsten carbide coated stainless steel substrate with a hardness of HRC60 or higher, exhibiting excellent wear resistance. The liner is fixed to the bottom of the grinding cavity with bolts and can be replaced individually when wear reaches a certain level, extending the service life of the entire grinding cavity. To further improve the grinding effect, hard alloy inserts are added to the arc-shaped protrusion of the eccentric wheel. The inserts are made of tungsten-cobalt hard alloy material with a hardness of HRA90 or higher. The inserts are distributed in a fan shape, forming a micro-protrusion structure with the surface of the eccentric wheel, increasing the force on the graphite particles. Under the same process conditions, the improved grinding chamber increases the specific surface area of ​​graphite particles by 30%, improves sphericity by 20%, and improves the uniformity coefficient of particle size distribution by 15%. The improvement is particularly noticeable for high-hardness natural graphite, with grinding time reduced by 25% and energy consumption decreased by 20%. Mass production verification has shown that the improved grinding chamber structure is especially suitable for the fine grinding of high-end spherical graphite, significantly improving product quality stability and reducing the defect rate to below 2%, resulting in significant economic benefits for enterprises.

[0041] Specifically, the principle of this invention is as follows: Based on the principles of vibration dynamics and powder engineering, this device generates periodic excitation force through the rotation of an eccentric wheel, causing the entire vibrating machine to produce composite vibration motion. When the eccentric wheel rotates at high speed under the drive of the transmission shaft, the centrifugal force generated by the eccentric mass forms a periodically changing excitation force. This excitation force is transmitted to the vibrating machine through the transmission shaft, causing the vibrating machine to produce composite vibration in both horizontal and vertical directions. Spherical graphite particles are subjected to vibration force within the spherical grinding chamber, resulting in a combination of various motion forms such as projectile, rolling, and sliding, forming a three-dimensional motion trajectory. The spiral grooves on the inner wall of the grinding chamber further guide the graphite particles to produce spiral motion, increasing the frequency of friction and collision between particles and between particles and the chamber wall, achieving uniform grinding of the graphite surface. The design of the shock-absorbing spring assembly is based on vibration isolation theory. By rationally selecting the spring stiffness and damping coefficient, the natural frequency of the system is kept away from the excitation frequency, avoiding resonance and effectively isolating the transmission of vibration to the foundation. The adjustment mechanism changes the tilt angle of the vibrating body by altering the screw length, thereby changing the direction and amplitude of vibration and achieving precise control of vibration parameters. Under the combined action of vibration, gravity, friction, and other forces, the entire system enables graphite particles to move in an ideal state within the grinding chamber, achieving efficient and uniform grinding.

[0042] Before use, first check that all parts of the equipment are securely connected, confirm that the shock-absorbing spring assembly is working properly, and that the adjustment mechanism is in the appropriate position. Before starting, put the spherical graphite to be ground into the spherical grinding chamber through the feed inlet in the center of the sealed cover. The amount of material should be controlled between 60% and 80% of the grinding chamber volume to avoid overfeeding, which would affect the grinding effect. Close the sealed cover and tighten the bolts to ensure that the grinding chamber is completely sealed. Start the drive motor. The motor drives the transmission shaft to rotate through the coupling, and the eccentric wheel on the transmission shaft begins to generate vibration excitation. According to the particle size and hardness requirements of the graphite, the vibration frequency is controlled by adjusting the motor speed. Generally, the working frequency is controlled within the range of 1500 rpm to 3000 rpm. At the same time, the tilt angle of the vibrator body is adjusted by adjusting the adjusting screw of the adjustment mechanism to change the vibration direction and amplitude to achieve the best grinding effect. During the grinding process, the operating status of the equipment should be closely monitored, including parameters such as vibration amplitude, operating noise, and temperature changes. If any abnormality is found, the machine should be stopped immediately for inspection. The grinding time is determined according to the initial state of the graphite and the target requirements, generally between 30 minutes and 120 minutes. After grinding is complete, stop the motor and wait for the vibration to completely cease before opening the ball valve at the discharge port. Use gravity to discharge the ground graphite from the bottom. Clean any remaining material from the grinding chamber and check for equipment wear to prepare for the next grinding cycle.

Claims

1. A vibration structure for a spherical graphite vibratory grinding device, characterized in that, include: The vibratory machine body comprises a vibration excitation device, a support base, a drive shaft, an adjustment mechanism, and a sealing cover. The vibration machine body is cylindrical, with an internal spherical grinding chamber made of stainless steel. The support base is fixed to the ground, and its upper surface is connected to the bottom of the vibration machine body via a shock-absorbing spring assembly. The vibration excitation device includes an eccentric wheel and a drive motor. The drive motor is fixedly mounted on the side wall of the support base, and its output shaft is connected to the drive shaft via a coupling. An eccentric wheel is fixedly connected to the upper end of the drive shaft, located inside the vibration machine body and maintaining a clearance fit with the inner wall of the vibration machine body. The adjustment mechanism includes an adjustment screw and an adjustment handle. One end of the adjustment screw is threaded to the support base, and the other end is connected to the side wall of the vibration machine body via a ball joint. The adjustment handle is fixed to the middle of the adjustment screw. The sealing cover is fixed to the top of the vibration machine body by a bolt assembly, and a feed inlet is located at the center of the sealing cover.

2. The vibration structure of the spherical graphite vibratory grinding device according to claim 1, characterized in that, The shock-absorbing spring assembly includes an upper spring seat, a lower spring seat, and a helical spring; the lower spring seat is fixed to the upper surface of the support base, the upper spring seat is fixed to the bottom of the vibrating machine body, and the two ends of the helical spring are connected to the upper spring seat and the lower spring seat respectively; the helical spring is made of carbon steel, and at least four helical springs are evenly distributed along the circumference of the bottom of the vibrating machine body.

3. The vibration structure of the spherical graphite vibratory grinding device according to claim 2, characterized in that, The drive shaft is rotatably mounted at the bottom center of the vibratory body via a bearing assembly. The bearing assembly includes a bearing housing and a deep groove ball bearing. The bearing housing is fixed to the inner wall of the bottom of the vibratory body, and the deep groove ball bearing is installed inside the bearing housing. The drive shaft passes through the deep groove ball bearing and is connected by a key to transmit power. The bearing housing is made of cast iron.

4. The vibration structure of the spherical graphite vibratory grinding device according to claim 3, characterized in that, The eccentricity of the eccentric wheel is in the range of 5 mm to 15 mm, and the ratio of the outer diameter of the eccentric wheel to the inner diameter of the spherical grinding cavity is between 0.3 and 0.

7. The eccentric wheel is fixedly connected to the upper end of the drive shaft through a keyway, and the material of the eccentric wheel is alloy steel. The outer surface of the eccentric wheel is provided with multiple arc-shaped protrusions, which are evenly distributed along the circumference of the eccentric wheel.

5. The vibration structure of the spherical graphite vibratory grinding device according to claim 4, characterized in that, The diameter of the spherical grinding chamber is in the range of 100 mm to 300 mm, and the wall thickness of the spherical grinding chamber is in the range of 10 mm to 20 mm; a discharge port is provided at the lowest point of the spherical grinding chamber, and the discharge port is controlled to open and close by a ball valve; the valve body of the ball valve is made of stainless steel.

6. The vibration structure of the spherical graphite vibratory grinding device according to claim 5, characterized in that, Three adjusting screws are evenly spaced along the circumference of the support base, and each adjusting screw is locked to the support base by a nut. The adjusting screws are made of carbon steel and have trapezoidal threads. The ball joint includes a ball head and a ball socket. The ball head is fixed to the top of the adjusting screw, and the ball socket is fixed to the side wall of the vibrating machine body.

7. The vibration structure of the spherical graphite vibratory grinding device according to claim 6, characterized in that, The outer wall of the vibrating body is cylindrical, and heat dissipation ribs are provided on the outer surface of the vibrating body. The heat dissipation ribs extend along the axial direction of the vibrating body and are evenly distributed along the circumference.

8. The vibration structure of the spherical graphite vibratory grinding device according to claim 7, characterized in that, The inner wall surface of the spherical grinding cavity is provided with a spiral groove, the depth of which is in the range of 2 mm to 5 mm, and the pitch of which is in the range of 20 mm to 40 mm.

9. The vibration structure of the spherical graphite vibratory grinding device according to claim 8, characterized in that, The support base has a square base plate structure, and the four corners of the support base are respectively provided with anchor bolt holes, the diameter of which is in the range of 12 mm to 20 mm.

10. The vibration structure of the spherical graphite vibratory grinding device according to claim 9, characterized in that, The sealing cap has a circular raised structure, and the center of the sealing cap protrudes upward to form a conical structure, with the apex angle of the conical structure ranging from 60 degrees to 90 degrees.

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