A silicon nitride powder grinding device

Abstract

The application provides a silicon nitride powder grinding device, and relates to the technical field of silicon nitride powder preparation. The device comprises a device main body, a silicon nitride particle feeding mechanism, a crushing mechanism and a powder grinding mechanism. The outlet end of the silicon nitride particle feeding mechanism is communicated with the crushing mechanism, the outlet end of the crushing mechanism is communicated with the silicon nitride particle feeding mechanism and the powder grinding mechanism, and a silicon nitride powder classification and recovery mechanism is arranged above the powder grinding mechanism. The silicon nitride particles are first crushed to form irregular shapes, thereby increasing the contact area between the particles and the grinding medium, and the surface roughness of the silicon nitride particles is increased to some extent due to the irregular shape, thereby accelerating the grinding efficiency of the silicon nitride powder grinding device. The silicon nitride powder classification and recovery mechanism is used to classify and recover the ground powder, thereby improving the quality of the silicon nitride powder.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of silicon nitride powder preparation, in particular to a silicon nitride powder grinding device. BACKGROUND

[0002] Silicon nitride is a kind of ceramic material with high hardness, stable structure, small thermal expansion coefficient, excellent oxidation resistance and corrosion resistance, and good thermal and chemical properties. The silicon nitride ceramic powder has high purity, high nitrogen content, narrow particle size distribution, high sintering activity, stable chemical composition, decomposition resistance, high temperature oxidation resistance, especially high temperature strength, high hardness, good wear resistance, good thermal and force impact resistance, and self-lubricating effect. It forms a fine dispersed phase in the composite material, thereby greatly improving the comprehensive performance of the composite material.

[0003] The existing silicon nitride powder grinding device usually adopts mixing and stirring of grinding medium and silicon nitride particles, and the silicon nitride powder is prepared through the friction between the grinding medium and the silicon nitride particles. However, due to the regular shape of the silicon nitride particles and the small surface friction coefficient, the grinding efficiency of the silicon nitride powder grinding device is low. In addition, the existing silicon nitride powder grinding device lacks a silicon nitride powder classification and recovery assembly, resulting in different thicknesses of the silicon nitride powder in the same batch of grinding. SUMMARY

[0004] The present application provides a silicon nitride powder grinding device to solve at least one of the above technical problems that the existing silicon nitride powder grinding device usually adopts mixing and stirring of grinding medium and silicon nitride particles, and the silicon nitride powder is prepared through the friction between the grinding medium and the silicon nitride particles. However, due to the regular shape of the silicon nitride particles and the small surface friction coefficient, the grinding efficiency of the silicon nitride powder grinding device is low. In addition, the existing silicon nitride powder grinding device lacks a silicon nitride powder classification and recovery assembly, resulting in different thicknesses of the silicon nitride powder in the same batch of grinding.

[0005] To solve the above technical problems, the present application discloses a silicon nitride powder grinding device, which comprises a device main body, a silicon nitride particle feeding mechanism, a crushing mechanism and a powder grinding mechanism arranged on the device main body. The outlet end of the silicon nitride particle feeding mechanism is communicated with the crushing mechanism, the outlet end of the crushing mechanism is communicated with the silicon nitride particle feeding mechanism and the powder grinding mechanism, and a silicon nitride powder classification and recovery mechanism is arranged above the powder grinding mechanism.

[0006] Preferably, the silicon nitride particle feeding mechanism comprises a silicon nitride particle feeding auger, which is rotatably connected in a first installation cavity. A silicon nitride particle feeding inlet and a silicon nitride particle discharging outlet are arranged on the first installation cavity.

[0007] Preferably, the crushing mechanism includes several evenly arranged curved shafts, which are rotatably connected to the second mounting cavity of the main body of the device. A linkage gear and a first bevel gear are fixedly connected to the curved shafts, and a second bevel gear is fixedly connected to the silicon nitride particle feeding auger. The first bevel gear and the second bevel gear mesh with each other. A linkage rack is slidably connected in the second mounting cavity. The linkage rack is used to mesh with the several linkage gears. A tamping hammer is sleeved on the curved shaft, and a silicon nitride particle bearing bowl assembly is located directly below the tamping hammer. Below the silicon nitride particle bearing bowl assembly is a crushed particle output channel. One of the outlet ends of the crushed particle output channel is equipped with a screen, and the other outlet end communicates with the first mounting cavity.

[0008] Preferably, the silicon nitride particle bearing bowl assembly includes two symmetrically arranged arc-shaped bearing members, which are rotatably connected to the main body of the device, and two symmetrically arranged electric support cams are rotatably connected in the crushed particle output channel.

[0009] Preferably, two symmetrically arranged feeding screws are rotatably connected in the pellet output channel. A feeding funnel is threaded onto the feeding screws. The inner wall of the feeding funnel is provided with a feeding ramp. An electric gate is slidably connected up and down inside the feeding funnel. The electric gate is connected to the inner wall of the feeding funnel through a reset elastic element. A feeding drive rod is fixedly connected to the inner wall of the pellet output channel.

[0010] Preferably, the powder grinding mechanism includes a conveying component and a rotary stirring component, which are connected by a linkage component. The conveying component includes a first pulley, a second pulley, and a particle transmission belt. The first pulley and the second pulley are rotatably connected to the main body of the device and are connected by the particle transmission belt. The rotary stirring component includes a grinding cylinder, which is rotatably connected to the main body of the device. The linkage component is used to drive the conveying component and the rotary stirring component to work.

[0011] Preferably, the linkage component includes an electric rotating shaft, which is rotatably connected to the third mounting cavity of the main body of the device. A third pulley and a third bevel gear are fixedly connected to the electric rotating shaft. A fourth pulley is coaxially connected to the first pulley. The fourth pulley and the third pulley are connected by a connecting transmission belt. A first rotating shaft, a second rotating shaft, and a third rotating shaft are rotatably connected in the third mounting cavity. A fourth bevel gear and a first gear are fixedly connected to the first rotating shaft. The fourth bevel gear and the third bevel gear mesh with each other. A second gear and a fifth bevel gear are fixedly connected to the second rotating shaft. A sixth bevel gear and a turning gear are fixedly connected to the third rotating shaft. A gear ring is fixedly connected to the grinding cylinder. The gear ring meshes with the turning gear.

[0012] Preferably, a fourth rotating shaft is rotatably connected inside the third mounting cavity, and an inner and outer meshing gear is fixedly connected to the fourth rotating shaft. A stirring drive gear is fixedly connected to the third rotating shaft, and the stirring drive gear meshes internally with the inner and outer meshing gear. The grinding cylinder is provided with a fourth mounting cavity, and a fifth rotating shaft is rotatably connected inside the fourth mounting cavity. A first stirring bevel gear and an outer meshing gear are fixedly connected to the fifth rotating shaft, and the outer meshing gear meshes externally with the inner and outer meshing gear. A first stirring paddle, a second stirring paddle, and a third stirring paddle are rotatably connected inside the grinding cylinder. The axes of the second stirring paddle and the first and third stirring paddles are perpendicular to each other. A second stirring bevel gear and a first worm gear are fixedly connected to the first stirring paddle, and the second stirring bevel gear meshes with the first stirring bevel gear. A worm is fixedly connected to the second stirring paddle, and a second worm gear is fixedly connected to the third stirring paddle. Both the first and second worm gears mesh with the worm. The grinding cylinder is provided with a mounting shell, and the first worm gear, the second worm gear, and the worm are all located inside the mounting shell.

[0013] Preferably, it also includes a grinding ball feeding mechanism, which includes an electric screw, which is rotatably connected to the fifth mounting cavity of the main body of the device. A feeding plate is threaded onto the electric screw, and several grinding balls are placed on the feeding plate. A grinding ball feeding electric gate is slidably connected up and down inside the grinding cylinder, and a grinding ball feeding actuating roller is rotatably connected inside the fifth mounting cavity.

[0014] Preferably, the silicon nitride powder sorting and recycling mechanism includes a negative pressure pump, a powder recycling chamber, and several suction nozzles. The negative pressure pump is connected to the powder recycling chamber, the several suction nozzles are arranged on the powder recycling chamber, and a sealing plug is installed above the powder recycling chamber.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By first crushing the silicon nitride particles to form irregular shapes, the contact area between them and the grinding stones is increased. At the same time, the irregular shapes increase the surface roughness of the silicon nitride particles to a certain extent, thereby accelerating the grinding efficiency of the silicon nitride powder grinding device. Meanwhile, a silicon nitride powder classification and recycling mechanism is used to classify and recycle the ground powder, thereby improving the quality of silicon nitride powder leaving the factory.

[0018] 2. By setting different air pressure differences, powders of different particle sizes can be recovered, thereby achieving the effect of classified recovery. When powder needs to be taken, open the sealing plug and insert the powder suction component into the powder recovery chamber to suck up the powder.

[0019] 3. The rotation of the grinding cylinder 4002, combined with the rotation of the first stirring paddle 4024, the second stirring paddle 4025 and the third stirring paddle 4026, accelerates the friction between the grinding media balls and silicon nitride particles inside the grinding cylinder 4002, thereby accelerating the grinding efficiency of the silicon nitride powder grinding device. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 A schematic diagram of the silicon nitride particle feeding mechanism of the present invention;

[0023] Figure 3 For the present invention Figure 1 A magnified structural diagram of region A in the diagram;

[0024] Figure 4 For the present invention Figure 1 A magnified structural diagram of region B in the diagram;

[0025] Figure 5 This is a schematic diagram of the powder grinding mechanism of the present invention;

[0026] In the diagram: 1. Main body of the device; 2. Silicon nitride particle feeding mechanism; 200. Silicon nitride particle feeding auger; 2000. First mounting cavity; 2001. Silicon nitride particle inlet; 2002. Silicon nitride particle outlet; 3. Crushing mechanism; 300. Bending rod shaft; 3000. Linkage gear; 3001. First bevel gear; 3002. Second bevel gear; 3003. Second mounting cavity; 3004. Linkage rack; 3005. Tamping hammer; 3006. Crushed particle output channel; 3007. Screen; 301. Silicon nitride particle bearing bowl assembly; 30 10. Arc-shaped bearing component; 3011. Electric support cam; 302. Feeding screw; 3020. Feeding funnel; 3021. Feeding ramp; 3022. Electric gate; 3023. Reset elastic element; 3024. Feeding drive rod; 4. Powder grinding mechanism; 400. First pulley; 4000. Second pulley; 4001. Particle transmission belt; 4002. Grinding cylinder; 4003. Electric rotating shaft; 4004. Third mounting cavity; 4005. Third pulley; 4006. Third bevel gear; 4007. Fourth pulley; 4008. Connector 4009. Drive belt; 401. First shaft; 401. Fourth bevel gear; 4010. First gear; 4011. Second shaft; 4012. Third shaft; 4013. Fourth shaft; 4014. Second gear; 4015. Fifth bevel gear; 4016. Sixth bevel gear; 4017. Actuating gear; 4018. Gear ring; 4019. Internal and external meshing gears; 402. Stirring drive gear; 4020. Fourth mounting cavity; 4021. Fifth shaft; 4022. First stirring bevel gear; 4023. External meshing gear; 4024. First stirring... 4025. Second stirring paddle; 4026. Third stirring paddle; 4027. Second stirring bevel gear; 4028. First worm gear; 4029. Worm; 403. Second worm gear; 4030. Mounting housing; 404. Electric screw; 4040. Fifth mounting cavity; 4041. Feeding plate; 4042. Grinding media ball; 4043. Electric gate for feeding grinding media ball; 4044. Feeding roller for grinding media ball; 5. Silicon nitride powder classification and recovery mechanism; 500. Negative pressure pump; 5000. Powder recovery cavity; 5001. Suction nozzle; 5002. Sealing plug. Detailed Implementation

[0027] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0028] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] The present invention provides the following embodiments.

[0030] Example 1

[0031] This invention provides a silicon nitride powder grinding device, such as... Figures 1-5 As shown, the device includes a main body 1, on which a silicon nitride particle feeding mechanism 2, a crushing mechanism 3, and a powder grinding mechanism 4 are provided. The outlet end of the silicon nitride particle feeding mechanism 2 is connected to the crushing mechanism 3, and the outlet end of the crushing mechanism 3 is connected to both the silicon nitride particle feeding mechanism 2 and the powder grinding mechanism 4. A silicon nitride powder classification and recycling mechanism 5 is provided above the powder grinding mechanism 4.

[0032] The working principle and beneficial effects of the above technical solution are as follows: During operation, silicon nitride particles are poured into the silicon nitride particle feeding mechanism 2. Under the action of the silicon nitride particle feeding mechanism 2, the silicon nitride particles are transported to the crushing mechanism 3. After being crushed to a certain extent by the crushing mechanism 3, they are poured into the powder grinding mechanism 4 for grinding to form silicon nitride powder. Then, the silicon nitride powder classification and recycling mechanism 5 classifies and recycles the ground powder.

[0033] By first crushing the silicon nitride particles to form irregular shapes, the contact area between them and the grinding stones is increased. At the same time, the irregular shapes increase the surface roughness of the silicon nitride particles to a certain extent, thereby accelerating the grinding efficiency of the silicon nitride powder grinding device. Meanwhile, the silicon nitride powder classification and recycling mechanism 5 is used to classify and recycle the ground powder, thereby improving the quality of the silicon nitride powder leaving the factory.

[0034] This invention addresses the problem that existing silicon nitride powder grinding devices typically use grinding media and silicon nitride particles to mix and stir, and then prepare silicon nitride powder through the friction between the grinding media and the silicon nitride particles. However, because silicon nitride particles have relatively regular shapes and low surface friction coefficients, the grinding efficiency of silicon nitride powder grinding devices is low. At the same time, existing silicon nitride powder grinding devices lack silicon nitride powder classification and recycling components, resulting in inconsistent particle size of silicon nitride powder ground in the same batch.

[0035] Example 2

[0036] Based on Example 1, such as Figures 1-3 As shown, the silicon nitride particle feeding mechanism 2 includes a silicon nitride particle feeding auger 200, which is rotatably connected in the first mounting cavity 2000. The first mounting cavity 2000 is provided with a silicon nitride particle inlet 2001 and a silicon nitride particle outlet 2002.

[0037] The crushing mechanism 3 includes several evenly arranged curved shafts 300. The curved shafts 300 are rotatably connected to the second mounting cavity 3003 of the main body 1. A linkage gear 3000 and a first bevel gear 3001 are fixedly connected to the curved shafts 300. A second bevel gear 3002 is fixedly connected to the silicon nitride particle feeding auger 200. The first bevel gear 3001 and the second bevel gear 3002 mesh with each other. A linkage rack 3004 is slidably connected in the second mounting cavity 3003. The linkage rack 3004 is used to mesh with several linkage gears 3000. A tamping hammer 3005 is sleeved on the curved shafts 300. A silicon nitride particle bearing bowl assembly 301 is located directly below the tamping hammer 3005. Below the silicon nitride particle bearing bowl assembly 301 is a crushed particle output channel 3006. One of the outlet ends of the crushed particle output channel 3006 is equipped with a screen 3007, and the other outlet end communicates with the first mounting cavity 2000.

[0038] The silicon nitride particle support bowl assembly 301 includes two symmetrically arranged arc-shaped support members 3010, which are rotatably connected to the main body 1 of the device. Two symmetrically arranged electric support cams 3011 are rotatably connected in the crushed particle output channel 3006.

[0039] The working principle and beneficial effects of the above technical solution are as follows: Silicon nitride particles are poured into the silicon nitride particle feeding mechanism 2 through the silicon nitride particle inlet 2001. Then, the silicon nitride particle feeding auger 200 rotates, and the silicon nitride particles are transported to the silicon nitride particle outlet 2002 under the action of the silicon nitride particle feeding auger 200. After that, they fall into the arc-shaped bearing member 3010 through the silicon nitride particle outlet 2002.

[0040] The rotation of the silicon nitride particle feeding auger 200 drives the second bevel gear 3002 to rotate, which in turn drives the first bevel gear 3001 to rotate. The first bevel gear 3001 then drives the bent rod shaft 300 to rotate, which in turn drives the tamping hammer 3005 to move up and down, crushing the silicon nitride particles within the arc-shaped support member 3010. This crushes the silicon nitride particles into small, irregularly shaped angular pieces. After the silicon nitride particles are crushed to a certain extent, the electric support cam 3011 rotates, causing the two arc-shaped support members 3010 to rotate in opposite directions. The movement causes the crushed silicon nitride particles to fall into the crushed particle output channel 3006 under the action of gravity. Silicon nitride particles whose actual particle size reaches the preset size will fall into the powder grinding mechanism 4 through the screen 3007. Silicon nitride particles whose actual particle size is larger than the preset size will not be able to pass through the screen 3007, will roll off the screen 3007, and will be recycled back to the first mounting cavity 2000 through the crushed particle output channel 3006, where they will be fed and crushed again until their size reaches the preset standard, thereby ensuring the grinding efficiency.

[0041] The rotation of the bent rod shaft 300 first drives one of the linkage gears 3000 to rotate. The rotation of the linkage gear 3000 will drive the linkage rack 3004 to move. The movement of the linkage rack 3004 will drive the other linkage gears 3000 to rotate. The rotation of the other linkage gears 3000 will drive their respective corresponding bent rod shafts 300 to rotate, thereby driving their respective corresponding tamping hammers 3005 to move up and down.

[0042] Example 3

[0043] Based on Example 2, such as Figures 1-3 As shown, two symmetrically arranged feeding screws 302 are rotatably connected inside the pellet output channel 3006. A feeding funnel 3020 is threaded onto the feeding screws 302. The inner wall of the feeding funnel 3020 is provided with a feeding ramp 3021. An electric gate 3022 is slidably connected up and down inside the feeding funnel 3022. The electric gate 3022 is connected to the inner wall of the feeding funnel 3023 through a reset elastic element 3023. A feeding drive rod 3024 is fixedly connected to the inner wall of the pellet output channel 3006.

[0044] The working principle and beneficial effects of the above technical solution are as follows: To ensure the effectiveness of crushing silicon nitride particles, the silicon nitride particles can be crushed multiple times in small quantities, and the crushed silicon nitride particles are concentrated on the electric gate 3022 each time, and then screened all at once. During operation, the discharge screw 302 rotates, driving the discharge funnel 3020 to move downward. During the downward movement of the discharge funnel 3020, the discharge drive rod 3024 remains stationary. When the discharge funnel 3020 moves to a certain height, the discharge drive rod 3024 begins to push the electric gate 3022 upward. The upward movement of the electric gate 3022 creates a gap between the electric gate 3022 and the inner wall of the discharge funnel 3020. The silicon nitride particles flow downward through the gap and the discharge ramp 3021, thereby achieving the effect of multiple small-quantity centralized screening.

[0045] Example 4

[0046] Based on Example 1, such as Figure 1 and 4 As shown, the powder grinding mechanism 4 includes a conveying component and a rotary stirring component. The conveying component and the rotary stirring component are connected by a linkage component. The conveying component includes a first pulley 400, a second pulley 4000, and a particle transmission belt 4001. The first pulley 400 and the second pulley 4000 are rotatably connected to the main body 1 of the device. The first pulley 400 and the second pulley 4000 are connected by the particle transmission belt 4001. The rotary stirring component includes a grinding cylinder 4002, which is rotatably connected to the main body 1 of the device. The linkage component is used to drive the conveying component and the rotary stirring component to work.

[0047] The linkage assembly includes an electric rotating shaft 4003, which is rotatably connected to the third mounting cavity 4004 of the main body 1. A third pulley 4005 and a third bevel gear 4006 are fixedly connected to the electric rotating shaft 4003. A fourth pulley 4007 is coaxially connected to the first pulley 400. The fourth pulley 4007 and the third pulley 4005 are connected by a connecting transmission belt 4008. A first rotating shaft 4009, a second rotating shaft 4011, and a third rotating shaft are rotatably connected within the third mounting cavity 4004. 4012, A fourth bevel gear 401 and a first gear 4010 are fixedly connected to the first rotating shaft 4009. The fourth bevel gear 401 meshes with the third bevel gear 4006. A second gear 4014 and a fifth bevel gear 4015 are fixedly connected to the second rotating shaft 4011. A sixth bevel gear 4016 and a turning gear 4017 are fixedly connected to the third rotating shaft 4012. A gear ring 4018 is fixedly connected to the grinding cylinder 4002. The gear ring 4018 meshes with the turning gear 4017.

[0048] The working principle and beneficial effects of the above technical solution are as follows: During operation, the electric rotating shaft 4003 rotates, driving the third pulley 4005 to rotate. The third pulley 4005 rotates, driving the transmission belt 4008 to rotate. The transmission belt 4008 drives the fourth pulley 4007 to rotate. The fourth pulley 4007 rotates, driving the particle transmission belt 4001 to drive. The particle transmission belt 4001 conveys the crushed silicon nitride particles that fall on the particle transmission belt 4001 to the grinding cylinder 4002.

[0049] Simultaneously, the rotation of the electric rotating shaft 4003 drives the third bevel gear 4006 to rotate, the rotation of the third bevel gear 4006 drives the fourth bevel gear 401 to rotate, the rotation of the fourth bevel gear 401 drives the first rotating shaft 4009 to rotate, the rotation of the first rotating shaft 4009 drives the first gear 4010 to rotate, the rotation of the first gear 4010 drives the second gear 4014 to rotate, the rotation of the second gear 4014 drives the second rotating shaft 4011 to rotate, the rotation of the second rotating shaft 4011 drives the fifth bevel gear 4015 to rotate, the rotation of the fifth bevel gear 4015 drives the sixth bevel gear 4016 to rotate, the rotation of the sixth bevel gear 4016 drives the third rotating shaft 4012 to rotate, the rotation of the third rotating shaft 4012 drives the turning gear 4017 to rotate, the rotation of the turning gear 4017 drives the gear ring 4018 to rotate, which in turn drives the grinding cylinder 4002 to rotate.

[0050] Example 5

[0051] Based on Example 4, such as Figure 1 and 5As shown, a fourth rotating shaft 4013 is rotatably connected inside the third mounting cavity 4004. An internal and external meshing gear 4019 is fixedly connected to the fourth rotating shaft 4013. A stirring drive gear 402 is fixedly connected to the third rotating shaft 4012, and the stirring drive gear 402 meshes internally with the internal and external meshing gear 4019. A fourth mounting cavity 4020 is provided inside the grinding cylinder 4002. A fifth rotating shaft 4021 is rotatably connected inside the fourth mounting cavity 4020. A first stirring bevel gear 4022 and an external meshing gear 4023 are fixedly connected to the fifth rotating shaft 4021, and the external meshing gear 4023 meshes externally with the internal and external meshing gear 4019. A first stirring paddle 4024 and a second stirring paddle 4025 are rotatably connected inside the grinding cylinder 4002. The third stirring paddle 4026 and the second stirring paddle 4025 are perpendicular to the axes of the first stirring paddle 4024 and the third stirring paddle 4026. The first stirring paddle 4024 is fixedly connected to a second stirring bevel gear 4027 and a first worm gear 4028. The second stirring bevel gear 4027 meshes with the first stirring bevel gear 4022. The second stirring paddle 4025 is fixedly connected to a worm 4029. The third stirring paddle 4026 is fixedly connected to a second worm gear 403. The first worm gear 4028 and the second worm gear 403 both mesh with the worm gear 4029. The grinding cylinder 4002 is provided with a mounting shell 4030. The first worm gear 4028, the second worm gear 403 and the worm gear 4029 are all located inside the mounting shell 4030.

[0052] The working principle and beneficial effects of the above technical solution are as follows: the rotation of the third rotating shaft 4012 drives the stirring drive gear 402 to rotate, the rotation of the stirring drive gear 402 drives the internal and external meshing gear 4019 to rotate, the rotation of the internal and external meshing gear 4019 drives the external meshing gear 4023 to rotate, the rotation of the external meshing gear 4023 drives the fifth rotating shaft 4021 to rotate, the rotation of the fifth rotating shaft 4021 drives the first stirring bevel gear 4022 to rotate, the rotation of the first stirring bevel gear 4022 drives the second stirring bevel gear 4027 to rotate, the rotation of the second stirring bevel gear 4027 drives the first stirring paddle 4024 to rotate, the rotation of the first stirring paddle 4024 drives the first worm gear 4028 to rotate, the rotation of the first worm gear 4028 drives the worm 4029 to rotate, the rotation of the worm 4029 drives the second stirring paddle 4025 to rotate, and at the same time, the rotation of the worm 4029 drives the second worm gear 403 to rotate, and the rotation of the second worm gear 403 drives the third stirring paddle 4026 to rotate.

[0053] The rotation of the grinding cylinder 4002, combined with the rotation of the first stirring paddle 4024, the second stirring paddle 4025 and the third stirring paddle 4026, accelerates the friction between the grinding media balls and silicon nitride particles inside the grinding cylinder 4002, thereby accelerating the grinding efficiency of the silicon nitride powder grinding device.

[0054] During use, the first stirring paddle 4024, the second stirring paddle 4025 and the third stirring paddle 4026 can be used to stir the grinding balls and silicon nitride particles. After a period of time, the grinding cylinder 4002 rotates once, thereby further disrupting the position of the grinding balls and silicon nitride particles inside the grinding cylinder 4002, so that each silicon nitride particle can be fully ground.

[0055] Example 6

[0056] Based on Example 5, such as Figure 1 and 5 As shown, it also includes a grinding ball feeding mechanism, which includes an electric screw 404. The electric screw 404 is rotatably connected to the fifth mounting cavity 4040 of the main body 1 of the device. A feeding plate 4041 is threadedly connected to the electric screw 404. Several grinding balls 4042 are placed on the feeding plate 4041. A grinding ball feeding electric gate 4043 is slidably connected up and down in the grinding cylinder 4002. A grinding ball feeding actuating roller 4044 is rotatably connected in the fifth mounting cavity 4044.

[0057] The working principle and beneficial effects of the above technical solution are as follows: When grinding media balls 4042 are added into the grinding cylinder 4002, the grinding media ball feeding electric gate 4043 slides down to open the gate. Then, the electric screw 404 rotates and drives the feeding plate 4041 to move upward until the grinding media balls 4042 contact the grinding media ball feeding actuating roller 4044. Then, the grinding media ball feeding actuating roller 4044 rotates to move the grinding media balls 4042 into the grinding cylinder 4002.

[0058] Example 7

[0059] Based on Example 1, such as Figure 1 Figure 1 As shown, the silicon nitride powder sorting and recycling mechanism 5 includes a negative pressure pump 500, a powder recycling chamber 5000 and several suction nozzles 5001. The negative pressure pump 500 is connected to the powder recycling chamber 5000, and several suction nozzles 5001 are arranged on the powder recycling chamber 5000. A sealing plug 5002 is installed above the powder recycling chamber 5000.

[0060] The working principle and beneficial effects of the above technical solution are as follows: When recycling powder, the negative pressure pump 500 is started, so that the silicon nitride powder formed by grinding in the grinding cylinder 4002 is sucked into the powder recycling chamber 5000 through the suction nozzle 5001 and stored under the action of negative pressure during the stirring process. Different particle sizes of powder can be recycled by setting different air pressure differences, thereby achieving the effect of classified recycling. When it is necessary to take powder, the sealing plug 5002 is opened and the powder suction component is inserted into the powder recycling chamber 5000 to suck up the powder.

[0061] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A silicon nitride powder grinding device, characterized in that: The device includes a main body (1), on which a silicon nitride particle feeding mechanism (2), a crushing mechanism (3) and a powder grinding mechanism (4) are provided. The outlet end of the silicon nitride particle feeding mechanism (2) is connected to the crushing mechanism (3), and the outlet end of the crushing mechanism (3) is connected to the silicon nitride particle feeding mechanism (2) and the powder grinding mechanism (4). A silicon nitride powder classification and recycling mechanism (5) is provided above the powder grinding mechanism (4). The silicon nitride particle feeding mechanism (2) includes a silicon nitride particle feeding auger (200), which is rotatably connected to the first mounting cavity (2000). The first mounting cavity (2000) is provided with a silicon nitride particle inlet (2001) and a silicon nitride particle outlet (2002). The crushing mechanism (3) includes several evenly arranged curved shafts (300). The curved shafts (300) are rotatably connected to the second mounting cavity (3003) of the main body of the device (1). A linkage gear (3000) and a first bevel gear (3001) are fixedly connected to the curved shafts (300). A second bevel gear (3002) is fixedly connected to the silicon nitride particle feeding auger (200). The first bevel gear (3001) and the second bevel gear (3002) mesh with each other. A sliding connection is provided in the second mounting cavity (3003). A linkage rack (3004) is used to mesh with several linkage gears (3000). A tamping hammer (3005) is sleeved on the bent rod shaft (300). A silicon nitride particle bearing bowl assembly (301) is located directly below the tamping hammer (3005). Below the silicon nitride particle bearing bowl assembly (301) is a crushed particle output channel (3006). One of the outlet ends of the crushed particle output channel (3006) is equipped with a screen (3007), and the other outlet end is connected to the first mounting cavity (2000). The powder grinding mechanism (4) includes a conveying component and a rotary stirring component, which are connected by a linkage component; Two symmetrically arranged feeding screws (302) are rotatably connected inside the pellet output channel (3006). A feeding funnel (3020) is threaded onto the feeding screws (302). A feeding ramp (3021) is provided on the inner wall of the feeding funnel (3020). An electric gate (3022) is slidably connected inside the feeding funnel (3020). The electric gate (3022) is connected to the inner wall of the feeding funnel (3020) through a reset elastic element (3023). A feeding drive rod (3024) is fixedly connected to the inner wall of the pellet output channel (3006). To ensure the effectiveness of crushing silicon nitride particles, the particles can be crushed multiple times in small quantities, and the crushed silicon nitride particles are concentrated on the electric gate (3022) each time, and then screened all at once. During operation, the feeding screw (302) rotates and drives the feeding funnel (3020) to move downward. During the downward movement of the feeding funnel (3020), the feeding drive rod (3024) remains stationary. When the feeding funnel (3020) moves to a certain height, the feeding drive rod (3024) starts to push the electric gate (3022) upward. The upward movement of the electric gate (3022) creates a gap between the electric gate (3022) and the inner wall of the feeding funnel (3020). The silicon nitride particles flow downward through the gap and the feeding ramp (3021), thereby achieving the effect of multiple small-quantity centralized screening. The conveying assembly includes a first pulley (400), a second pulley (4000), and a particle transmission belt (4001). The first pulley (400) and the second pulley (4000) are rotatably connected to the main body (1) of the device. The first pulley (400) and the second pulley (4000) are connected through the particle transmission belt (4001). The rotary stirring assembly includes a grinding cylinder (4002), which is rotatably connected to the main body (1) of the device. The linkage assembly is used to drive the conveying assembly and the rotary stirring assembly to work. The silicon nitride powder sorting and recycling mechanism (5) includes a negative pressure pump (500), a powder recycling chamber (5000) and several suction nozzles (5001). The negative pressure pump (500) is connected to the powder recycling chamber (5000), and several suction nozzles (5001) are set on the powder recycling chamber (5000). A sealing plug (5002) is installed above the powder recycling chamber (5000). When recycling powder, the negative pressure pump (500) is started, so that the silicon nitride powder formed by grinding in the grinding cylinder (4002) is sucked into the powder recycling chamber (5000) through the suction nozzle (5001) under the action of negative pressure during the stirring process. By setting different air pressure differences, powders of different particle sizes are recycled, thereby achieving the effect of classified recycling. When it is necessary to take powder, the sealing plug (5002) is opened and the powder suction component is inserted into the powder recycling chamber (5000) to suck up the powder.

2. The silicon nitride powder grinding device according to claim 1, characterized in that: The silicon nitride particle carrier bowl assembly (301) includes two symmetrically arranged arc-shaped carriers (3010), which are rotatably connected to the main body of the device (1). Two symmetrically arranged electric support cams (3011) are rotatably connected in the crushed particle output channel (3006).

3. The silicon nitride powder grinding apparatus according to claim 1, characterized in that: The linkage assembly includes an electric rotating shaft (4003), which is rotatably connected to the third mounting cavity (4004) of the main body (1) of the device. A third pulley (4005) and a third bevel gear (4006) are fixedly connected to the electric rotating shaft (4003). A fourth pulley (4007) is coaxially connected to the first pulley (400). The fourth pulley (4007) and the third pulley (4005) are connected by a connecting transmission belt (4008). A first rotating shaft (4009), a second rotating shaft (4011), and a third rotating shaft (4005) are rotatably connected within the third mounting cavity (4004). 4012), a fourth bevel gear (401) and a first gear (4010) are fixedly connected on the first rotating shaft (4009). The fourth bevel gear (401) meshes with the third bevel gear (4006). A second gear (4014) and a fifth bevel gear (4015) are fixedly connected on the second rotating shaft (4011). A sixth bevel gear (4016) and a turning gear (4017) are fixedly connected on the third rotating shaft (4012). A gear ring (4018) is fixedly connected on the grinding cylinder (4002). The gear ring (4018) meshes with the turning gear (4017).

4. The silicon nitride powder grinding apparatus according to claim 3, characterized in that: A fourth rotating shaft (4013) is rotatably connected inside the third mounting cavity (4004). An internal and external meshing gear (4019) is fixedly connected to the fourth rotating shaft (4013). A stirring drive gear (402) is fixedly connected to the third rotating shaft (4012). The stirring drive gear (402) meshes internally with the internal and external meshing gear (4019). A fourth mounting cavity (4020) is provided inside the grinding cylinder (4002). A fifth rotating shaft (4021) is rotatably connected inside the fourth mounting cavity (4020). A first stirring bevel gear (4022) and an external meshing gear (4023) are fixedly connected to the fifth rotating shaft (4021). The external meshing gear (4023) meshes externally with the internal and external meshing gear (4019). A first stirring paddle (4024), a second stirring paddle (4025), and a third stirring paddle are rotatably connected inside the grinding cylinder (4002). The mixing paddle (4026) and the second mixing paddle (4025) are perpendicular to the axes of the first mixing paddle (4024) and the third mixing paddle (4026). The first mixing paddle (4024) is fixedly connected to a second mixing bevel gear (4027) and a first worm gear (4028). The second mixing bevel gear (4027) meshes with the first mixing bevel gear (4022). The second mixing paddle (4025) is fixedly connected to a worm (4029). The third mixing paddle (4026) is fixedly connected to a second worm gear (403). The first worm gear (4028) and the second worm gear (403) mesh with the worm gear (4029). The grinding cylinder (4002) is provided with a mounting shell (4030). The first worm gear (4028), the second worm gear (403) and the worm gear (4029) are all located in the mounting shell (4030).

5. The silicon nitride powder grinding apparatus according to claim 4, characterized in that: It also includes a grinding ball feeding mechanism, which includes an electric screw (404), which is rotatably connected to the fifth mounting cavity (4040) of the main body of the device (1). A feeding plate (4041) is threadedly connected to the electric screw (404), and several grinding balls (4042) are placed on the feeding plate (4041). A grinding ball feeding electric gate (4043) is slidably connected up and down in the grinding cylinder (4002), and a grinding ball feeding actuating roller (4044) is rotatably connected in the fifth mounting cavity (4040).

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