Particle preparation system of sintered neodymium-iron-boron permanent magnet material

Abstract

The invention relates to a particle preparation system of a sintered neodymium-iron-boron permanent magnet material, and relates to the technical field of magnetic material particle preparation, the particle preparation system comprises a preparation box, the top of the preparation box is provided with a feed pipe, the side wall of the preparation box is provided with a discharge pipe, the lower part of the preparation box is provided with a storage tank, and the feed pipe is communicated with a feed port of a storage mechanism; the storage mechanism is communicated with the grinding mechanism, the grinding mechanism is communicated with the screening mechanism, a discharging port of the screening mechanism is communicated with the discharging pipe, and the preparation box protects the storage mechanism, the grinding mechanism and the screening mechanism which are used for preparing neodymium iron boron permanent magnet material particles. According to the system, neodymium-iron-boron permanent magnet raw materials are input into the storage mechanism in the preparation box through the feeding pipe to be temporarily stored, the storage mechanism conveys the raw materials to the grinding mechanism to be ground and refined, the screening mechanism conducts classified screening, qualified particles are output through the discharging pipe, and unqualified particles are discharged from the lower portion of the screening mechanism to be treated, so that the continuous preparation process is achieved; and the granularity quality of the neodymium-iron-boron permanent magnet material particles is ensured.

Description

Technical Field

[0001] This application relates to the technical field of magnetic material particle preparation, and particularly relates to a particle preparation system for sintered NdFeB permanent magnetic materials. Background Art

[0002] With the expansion of the application of sintered NdFeB permanent magnets in the automotive industry, artificial intelligence, and the aviation field, it has forced the sintered NdFeB permanent magnets to develop towards small volume and high energy density. At the same time, with the intensification of industry competition, reducing production costs is also an eternal topic, and improving the particle size distribution of NdFeB magnetic powder is an important way to improve magnetic properties.

[0003] Therefore, in view of the above situation, there is an urgent need to develop a particle preparation system for sintered NdFeB permanent magnetic materials to overcome the current deficiencies in actual applications. Summary of the Invention

[0004] In order to solve the defects in the above technology, this application provides a particle preparation system for sintered NdFeB permanent magnetic materials.

[0005] A particle preparation system for sintered NdFeB permanent magnetic materials provided by this application adopts the following technical solutions: A particle preparation system for sintered NdFeB permanent magnetic materials includes a preparation tank. A feed pipe is provided at the top of the preparation tank, a discharge pipe is provided on the side wall of the preparation tank, a storage tank is provided at the lower part of the preparation tank. A material storage mechanism for storing NdFeB permanent magnetic materials, an abrasive mechanism for grinding the NdFeB permanent magnetic materials, and a screening mechanism for screening the NdFeB permanent magnetic material particles are provided in the preparation tank. The feed pipe is communicated with the feed port of the material storage mechanism, the material storage mechanism is communicated with the abrasive mechanism, the abrasive mechanism is communicated with the screening mechanism, and the discharge port of the screening mechanism is communicated with the discharge pipe.

[0006] Optionally, the material storage mechanism includes a material storage chamber and a drive chamber. The material storage chamber and the drive chamber are respectively provided in the preparation tank. An inlet chamber is provided below the material storage chamber, and the inlet chamber is communicated with the abrasive mechanism. A motor is provided at the top of the preparation tank corresponding to the upper part of the drive chamber. A bevel gear one is provided at the drive end of the motor, and the drive end of the motor extends into the drive chamber. A drive shaft is horizontally provided in the drive chamber. A bevel gear two is provided in the middle of the drive shaft. The bevel gear one and the bevel gear two are meshed. One end of the drive shaft extends into the material storage chamber, and stirring blades are spaced on the part of the drive shaft in the material storage chamber.

[0007] Optionally, the abrasive mechanism includes a fixed cavity disposed within the preparation box. A fixed groove is formed at the bottom of the fixed cavity. An abrasive tank is arranged within the fixed cavity. A first fixing ring is fixedly provided at the bottom of the abrasive tank. A second fixing ring is disposed at the bottom of the first fixing ring and is inserted into the fixed groove. A gasket is provided between the bottom of the fixing ring and the bottom of the fixed groove. An air delivery pipe is arranged at the bottom of the fixed cavity. The part of the air delivery pipe extending into the storage tank is communicated with a multi-way pipe. The bottom of the multi-way pipe is communicated with an air source disposed within the storage tank. An inclined feeding pipe is arranged in the middle of the side wall of the abrasive tank. A docking pipe for docking with the feeding cavity is provided on the outer wall of the abrasive tank corresponding to the inclined feeding pipe. A plurality of ball heads are rotatably arranged at the lower part of the side wall of the abrasive tank. Avoidance grooves are respectively formed on both the inner and outer sides of the abrasive tank where the ball heads are located. Jet heads and a first intake pipe are respectively arranged on both sides of the ball head facing the inside and outside of the abrasive tank. An air inlet is formed at the bottom of the abrasive tank. A sieve plate is arranged within the air inlet. The bottom of the air inlet is communicated with the top of the air delivery pipe. The first intake pipe is communicated with the multi-way pipe through a second intake pipe arranged within the preparation box.

[0008] Optionally, a sorting wheel is rotatably arranged within the abrasive tank. A rotating shaft is fixedly provided on one side of the sorting wheel. The rotating shaft passes through the side wall of the abrasive tank and is fixedly connected to the other end of the driving shaft within the fixed cavity. A hollow rotating assembly communicated with the sorting wheel is fixedly arranged within the side wall of the abrasive tank. The rotating assembly includes a rotating end and a fixed end. The rotating end is rotatably connected to the fixed end. The fixed end is fixedly arranged within the side wall of the abrasive tank. The other side of the sorting wheel is inserted into the rotating end. The other end of the rotating end passes through the side wall of the abrasive tank and extends into the fixed cavity to be communicated with the screening mechanism.

[0009] Optionally, the screening mechanism includes a feeding pipe horizontally arranged within the preparation box. One end of the feeding pipe is communicated with the discharging end of the abrasive mechanism. The other end of the feeding pipe is tangentially communicated with a circular screening cavity. A rotating circular cavity is arranged below the screening circular cavity. An aggregate cavity is arranged below the rotating circular cavity. An aggregate bucket for manually collecting permanent magnet material particles is placed within the storage tank below the aggregate cavity. An exhaust pipe is fixedly provided at the top of the preparation box above the screening circular cavity. A wide pipe is arranged at the bottom of the exhaust pipe. The other side of the screening circular cavity is communicated with the discharging pipe through a discharging cavity.

[0010] Optionally, a first maintenance door is provided on the outer side of the preparation box corresponding to the material storage mechanism.

[0011] Optionally, a second maintenance door is hingedly arranged at the top of the preparation box above the fixed cavity.

[0012] Optionally, it further includes a speed detection module 1 for measuring the rotational speed of the drive shaft; A speed detection module 2 for measuring the flow rate of the neodymium iron boron permanent magnet material raw material in the storage chamber; A speed detection module 3 for measuring the angular velocity of the stirring blade; A calculation module 1 for calculating the actual safety operation coefficient of the storage mechanism based on the rotational speed of the drive shaft; An alarm module for giving an alarm; A processing module for comparing and processing the actual safety operation coefficient of the storage mechanism obtained by the calculation module 1 with the rated safety operation coefficient of the storage mechanism; A control module, when the actual safety operation coefficient of the storage mechanism is less than or equal to the rated safety operation coefficient of the storage mechanism, controls the alarm module to give an alarm, and at the same time controls the storage mechanism to stop working for maintenance. When the actual safety operation coefficient of the storage mechanism is greater than the rated safety operation coefficient of the storage mechanism, the storage mechanism normally provides raw materials for the abrasive mechanism.

[0013] Optionally, the calculation module 1 is calculated based on the following formula 1: K is the actual safety operation coefficient of the storage mechanism, M1 is the maximum mass of a single neodymium iron boron permanent magnet material raw material, M2 is the minimum mass of a single neodymium iron boron permanent magnet material raw material, V1 is the maximum volume of a single neodymium iron boron permanent magnet material raw material, V2 is the minimum volume of a single neodymium iron boron permanent magnet material raw material, β is the Poisson's ratio of the neodymium iron boron permanent magnet material raw material, E is the elastic modulus of the neodymium iron boron permanent magnet material raw material, N is the number of stirring blades, ρ is the density of the neodymium iron boron permanent magnet material raw material, A is the surface area of a single stirring blade, H is the thickness of the stirring blade, g is the acceleration due to gravity, s1 is the rotational speed of the drive shaft, s2 is the flow rate of the neodymium iron boron permanent magnet material raw material in the storage chamber, K S is the resistance coefficient of the stirring blade, π is the pi, D is the spacing of the stirring blades, w is the angular velocity of the stirring blade, R is the radius of the storage chamber.

[0014] In summary, the present application includes at least one of the following beneficial technical effects: 1. Integrated design: The storage, grinding, and screening mechanisms are integrated, reducing material transfer losses and improving production efficiency; 2. Automatic control: Each mechanism is automatically connected through a connecting pipe, realizing full-process automation from raw material input to finished product output; 3. Resource recycling: Unqualified particles are recycled through the storage tank, reducing raw material waste and improving the finished product rate. Description of the Drawings

[0015] Figure 1It is a schematic structural diagram of an embodiment of the present application; Figure 2 It is a schematic overall sectional structure diagram provided by an embodiment of the present application; Figure 3 It is a schematic partial sectional structure diagram provided by an embodiment of the present application; Figure 4 It is Figure 3 The partial enlarged view at position A in Figure 5 It is Figure 3 The partial enlarged view at position B in

[0016] Explanation of reference numerals: 1, preparation box; 2, feed pipe; 3, discharge pipe; 4, storage tank; 5, storage mechanism; 51, storage cavity; 52, drive cavity; 53, feed cavity; 54, motor; 55, bevel gear one; 56, drive shaft; 57, bevel gear two; 58, stirring blade; 6, abrasive mechanism; 61, fixed cavity; 611, fixed groove; 62, abrasive tank; 621, first fixing ring; 622, second fixing ring; 623, washer; 624, feed inclined pipe; 625, docking pipe; 626, sieve plate; 63, gas delivery pipe; 64, multi-way pipe; 65, gas source; 66, sorting wheel; 67, rotating shaft; 68, rotating assembly; 681, rotating end; 682, fixed end; 69, ball head; 691, avoidance groove; 692, air jet head; 693, intake pipe one; 694, intake pipe two; 7, screening mechanism; 71, material conveying pipe; 72, circular screening cavity; 73, rotating circular cavity; 74, aggregate cavity; 75, aggregate bucket; 76, wide pipe; 77, discharge cavity; 78, exhaust pipe; 8, inspection door one; 81, inspection door two. Detailed implementation manners

[0017] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only, and do not particularly refer to the order or sequence, nor are they used to limit the present invention. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0019] The present invention provides the following embodiments Embodiment 1 An embodiment of the present application discloses a particle preparation system for a sintered neodymium-iron-boron permanent magnet material. Referring to Figure 1-2 , it includes a preparation tank 1. A feed pipe 2 is provided at the top of the preparation tank 1. A discharge pipe 3 is provided on the side wall of the preparation tank 1. A storage tank 4 is provided at the lower part of the preparation tank 1. A storage mechanism 5 for storing neodymium-iron-boron permanent magnet material, an abrasive mechanism 6 for grinding the neodymium-iron-boron permanent magnet material, and a screening mechanism 7 for screening neodymium-iron-boron permanent magnet material particles are provided in the preparation tank 1. The feed pipe 2 is communicated with the feed port of the storage mechanism 5. The storage mechanism 5 is communicated with the abrasive mechanism 6. The abrasive mechanism 6 is communicated with the screening mechanism 7. The discharge port of the screening mechanism 7 is communicated with the discharge pipe 3.

[0020] The working principle and beneficial effects of the above technical solution are as follows: The preparation tank 1 protects the storage mechanism 5, the abrasive mechanism 6, and the screening mechanism 7 for preparing neodymium-iron-boron permanent magnet material particles. The system inputs the neodymium-iron-boron permanent magnet raw material into the storage mechanism 5 in the preparation tank 1 through the feed pipe 2 for temporary storage. The storage mechanism 5 transports the raw material to the abrasive mechanism 6 for grinding and refining. The ground particles enter the screening mechanism 7 for grading and screening. The qualified particles are output through the discharge pipe 3, and the unqualified particles are discharged from below the screening mechanism 7 for treatment, realizing a continuous preparation process and ensuring the particle size quality of the neodymium-iron-boron permanent magnet material particles.

[0021] Embodiment 2 On the basis of Embodiment 1, as Figure 1 - Figure 2As shown, the material storage mechanism 5 includes a material storage chamber 51 and a drive chamber 52. The material storage chamber 51 and the drive chamber 52 are respectively arranged in the preparation box 1. Below the material storage chamber 51, there is a feed chamber 53, and the feed chamber 53 is communicated with the abrasive mechanism 6. Corresponding to the top of the preparation box 1 above the drive chamber 52, there is a motor 54. A first bevel gear 55 is arranged at the drive end of the motor 54. The drive end of the motor 54 extends into the drive chamber 52. A drive shaft 56 is horizontally arranged in the drive chamber 52. A second bevel gear 57 is arranged in the middle of the drive shaft 56. The first bevel gear 55 and the second bevel gear 57 are meshed. One end of the drive shaft 56 extends into the material storage chamber 51. Stirring blades 58 are arranged at intervals on the part of the drive shaft 56 in the material storage chamber 51.

[0022] The working principle and beneficial effects of the above technical solution are as follows: The top of the preparation box 1 supports and fixes the motor 54. The material storage chamber 51 stores the neodymium iron boron permanent magnet raw material and drives the first bevel gear 55 by the motor 54 to drive the second bevel gear 57 to rotate. The bevel gear set realizes the stable transmission of the power of the motor 54 to the horizontal drive shaft 56, reducing mechanical vibration and energy consumption. The second bevel gear 57 and the drive shaft 56 rotate synchronously. The drive shaft 56 transmits the power to the stirring blades 58 in the material storage chamber 51. The stirring blades 58 rotate synchronously with the drive shaft 56 to continuously stir the neodymium iron boron permanent magnet raw material in the material storage chamber 51 to prevent caking and avoid the agglomeration problem caused by standing, ensuring the uniformity of subsequent grinding. The neodymium iron boron permanent magnet raw material is evenly transported to the abrasive mechanism 6 through the feed chamber 53 below the material storage chamber 51 for grinding and refinement to a suitable particle size.

[0023] Embodiment 3 On the basis of Embodiment 2, as Figure 1 - Figure 4As shown, the abrasive mechanism 6 includes a fixed cavity 61, which is arranged in the preparation box 1. A fixed groove 611 is formed at the bottom of the fixed cavity 61. An abrasive tank 62 is arranged in the fixed cavity 61. A first fixing ring 621 is fixedly arranged at the bottom of the abrasive tank 62. A second fixing ring 622 is arranged at the bottom of the first fixing ring 621. The second fixing ring 622 is inserted into the fixed groove 611. A gasket 623 is arranged between the bottom of the fixing ring and the bottom of the fixed groove 611. An air delivery pipe 63 is arranged at the bottom of the fixed cavity 61. The part of the air delivery pipe 63 extending into the storage tank 4 is communicated with a multi-way pipe 64. The bottom of the multi-way pipe 64 is communicated with an air source 65 arranged in the storage tank 4. An inclined feeding pipe 624 is arranged in the middle of the side wall of the abrasive tank 62. A docking pipe 625 for docking with the feeding cavity 53 is arranged on the outer wall of the abrasive tank 62 corresponding to the inclined feeding pipe 624. A plurality of ball heads 69 are rotatably arranged at the lower part of the side wall of the abrasive tank 62. Avoidance grooves 691 are respectively formed on the inner and outer sides of the abrasive tank 62 where the ball heads 69 are located. Jet heads 692 and a first air inlet pipe 693 are respectively arranged on the two sides of the ball heads 69 facing the inside and outside of the abrasive tank 62. An air inlet is formed at the bottom of the abrasive tank 62. A sieve plate 626 is arranged in the air inlet. The bottom of the air inlet is communicated with the top of the air delivery pipe 63. The first air inlet pipe 693 is communicated with the multi-way pipe 64 through a second air inlet pipe 694 arranged in the preparation box 1.

[0024] The working principle and beneficial effects of the above technical solution are as follows: The abrasive tank 62 is integrally fixed with the first fixing ring 621 and the second fixing ring 622. The fixing groove 611 limits and supports the second fixing ring 622, and the bottom of the fixing cavity 61 supports the first fixing ring 621. The abrasive tank 62 is stably fixed in the fixing cavity 61. The gasket 623 buffers between the bottom of the second fixing ring 622 and the bottom of the fixing groove 611, reducing the rigid impact and wear between the second fixing ring 622 and the fixing groove 611. The feeding inclined pipe 624 facilitates the entry of the neodymium iron boron permanent magnet raw material in the feeding cavity 53 into the abrasive tank 62. The docking pipe 625 connects the feeding inclined pipe 624 and the feeding cavity 53, facilitating the formation of a feeding pipeline that is easy to disassemble and assemble for the feeding cavity 53, the docking pipe 625, and the feeding inclined pipe 624. The side wall of the abrasive tank 62 limits the rotation of the ball head 69, facilitating the adjustment of the ball head 69 and thus adjusting the angle of the air jet head 692 on the ball head 69. The avoidance groove 691 opened on the abrasive tank 62 avoids the rotation angles of the air jet head 692 and the first air inlet pipe 693, so that the rotation angles of the air jet head 692 and the first air inlet pipe 693 are not interfered. The bottom of the fixing cavity 61 fixes the air delivery pipe 63. The air source 65 inputs gas into the air delivery pipe 63 and multiple first air inlet pipes 693 through the multi-way pipe 64. The multi-way pipe 64 facilitates the connection of multiple air paths. The air delivery pipe 63 and multiple first air inlet pipes 693 input gas into the abrasive tank 62 through the air inlet and multiple air jet heads 692. Pressure valves are provided on both the air delivery pipe 63 and multiple first air inlet pipes 693, facilitating the adjustment of the gas pressure in the air delivery pipe 63 and multiple first air inlet pipes 693. Multiple air jet heads 692 refine the neodymium iron boron permanent magnet material raw material in the air delivery pipe 63. The air delivery pipe 63 assists in blowing up the neodymium iron boron permanent magnet material raw material with large particles to the position blown by multiple air jet heads 692 for further refinement. At this time, the angles of multiple air jet heads 692 are the same, and multiple air jet heads 692 are distributed to form a three-dimensional air flow network, improving the grinding uniformity and also facilitating the transportation of abrasive grains above the abrasive tank 62 so that the abrasive grains enter the next processing step. The sorting wheel 66 has both grinding and preliminary sorting functions, improving the refinement efficiency.

[0025] Example 4 On the basis of Example 3, as Figure 2 - Figure 5As shown, a sorting wheel 66 is rotatably arranged in the abrasive tank 62. A rotating shaft 67 is fixedly arranged on one side of the sorting wheel 66. The rotating shaft 67 passes through the side wall of the abrasive tank 62 and is fixedly connected to the other end of the driving shaft 56 in the fixed cavity 61. A hollow rotating assembly 68 which is communicated with the sorting wheel 66 is fixedly arranged in the side wall of the abrasive tank 62. The rotating assembly 68 includes a rotating end 681 and a fixed end 682. The rotating end 681 is rotatably connected to the fixed end 682. The fixed end 682 is fixedly arranged in the side wall of the abrasive tank 62. The other side of the sorting wheel 66 is inserted into the rotating end 681. The other end of the rotating end 681 passes through the side wall of the abrasive tank 62 and extends into the fixed cavity 61 to be communicated with the screening mechanism 7.

[0026] The working principle and beneficial effects of the above technical solution are as follows: The sorting wheel 66 rotates synchronously with the rotating shaft 67. The other end of the driving shaft 56 drives the sorting wheel 66 to rotate at a high speed through the transmission connection with the rotating shaft 67. During the high-speed rotation of the sorting wheel 66, the particles transformed from the neodymium iron boron permanent magnet material raw materials are further refined, and the particles of the neodymium iron boron permanent magnet material raw materials are sheared and collision-ground; the side wall of the abrasive tank 62 fixes and restricts the fixed end 682. While the rotating end 681 rotates synchronously with the sorting wheel 66, it is rotatably connected to the fixed wheel. The particles entering the sorting wheel 66 pass through the rotating end 681 of the rotating assembly 68, are linked with the sorting wheel 66, and then pass through the fixed end 682, and the ground fine particles are conveyed to the screening mechanism 7 for screening treatment.

[0027] Example 5 On the basis of Example 4, as Figure 1 - Figure 3 shown, the screening mechanism 7 includes a feeding pipe 71. The feeding pipe 71 is horizontally arranged in the preparation box 1. One end of the feeding pipe 71 is communicated with the discharging end of the abrasive mechanism 6. The other end of the feeding pipe 71 is tangentially communicated with a circular screening cavity 72. A rotating circular cavity 73 is arranged below the screening circular cavity. An aggregate cavity 74 is arranged below the rotating circular cavity 73. An aggregate bucket 75 for manually collecting permanent magnet material particles is placed in the storage tank 4 below the aggregate cavity 74. An exhaust pipe 78 is fixedly arranged at the top of the preparation box 1 above the screening circular cavity. A wide pipe 76 is arranged at the bottom of the exhaust pipe 78. The other side of the screening circular cavity is communicated with the discharging pipe 3 through a discharging cavity 77.

[0028] The working principle and beneficial effects of the above technical solution are as follows: One end of the feeding pipe 71 communicates with the fixed end 682 in the abrasive mechanism 6. The finely ground particles and gas tangentially enter the circular screening chamber 72 from the other end of the feeding pipe 71. A spiral rotating air flow occurs in the circular screening chamber 72 and the rotating circular chamber 73. Rapid particle classification is achieved under the action of centrifugal force. The ultra-fine particle permanent magnet material is discharged from the discharge chamber 77 and the discharge pipe 3. The fine particle permanent magnet material falls through the aggregate chamber 74 and into the aggregate bucket 75. The aggregate bucket 75 is directly docked with the storage tank 4 to prevent dust leakage, meeting environmental protection requirements. The air flow in the chamber is discharged from the top of the exhaust pipe 78 after passing through the wide pipe 76.

[0029] Example 6 On the basis of Example 5, as Figure 1 - Figure 2 shown, a first maintenance door 8 is provided on the outer side of the preparation box 1 corresponding to the storage mechanism 5.

[0030] The working principle and beneficial effects of the above technical solution are as follows: The first maintenance door 8 is hinged and sealed with the outer wall of the preparation box 1. The inside of the storage mechanism 5 is maintained by opening the first maintenance door 8.

[0031] Example 7 On the basis of Example 6, as Figure 1 - Figure 2 shown, a second maintenance door 81 is hingedly provided at the top of the preparation box 1 above the fixed chamber 61.

[0032] The working principle and beneficial effects of the above technical solution are as follows: The second maintenance door 81 is hinged and sealed with the outer wall of the preparation box 1. The inside of the fixed chamber 61 is maintained by opening the second maintenance door 81, which facilitates the replacement and repair of the abrasive tank 62.

[0033] Example 8 On the basis of Example 7, it further includes, a first speed detection module for measuring the rotational speed of the drive shaft 56; a second speed detection module for measuring the flow rate of the neodymium iron boron permanent magnet material raw material in the storage chamber 51; a third speed detection module for measuring the angular velocity of the stirring blade 58; a first calculation module for calculating the actual safe operation coefficient of the storage mechanism 5 based on the rotational speed of the drive shaft 56; an alarm module for issuing an alarm; a processing module for comparing and processing the actual safe operation coefficient of the storage mechanism 5 obtained by the first calculation module with the rated safe operation coefficient of the storage mechanism 5; The control module controls the alarm module to issue an alarm when the actual safety operation coefficient of the material storage mechanism 5 is less than or equal to the rated safety operation coefficient of the material storage mechanism 5, and at the same time controls the material storage mechanism 5 to stop working for maintenance. When the actual safety operation coefficient of the material storage mechanism 5 is greater than the rated safety operation coefficient of the material storage mechanism 5, the material storage mechanism 5 normally provides raw materials for the abrasive mechanism 6.

[0034] The working principle and beneficial effects of the above technical solution are as follows: The speed detection module one measures the rotational speed of the drive shaft 56, the speed detection module two measures the flow rate of the neodymium iron boron permanent magnet material raw material in the storage chamber 51, the speed detection module three measures the angular velocity of the stirring blade 58. The calculation module one calculates the actual safety operation coefficient of the material storage mechanism 5 based on the rotational speed of the drive shaft 56. The alarm module is used to issue an alarm. The processing module compares and processes the actual safety operation coefficient of the material storage mechanism 5 obtained by the calculation module one with the rated safety operation coefficient of the material storage mechanism 5. When the actual safety operation coefficient of the material storage mechanism 5 is less than or equal to the rated safety operation coefficient of the material storage mechanism 5, the control module controls the alarm module to issue an alarm, and at the same time controls the material storage mechanism 5 to stop working for maintenance. When the actual safety operation coefficient of the material storage mechanism 5 is greater than the rated safety operation coefficient of the material storage mechanism 5, the material storage mechanism 5 normally provides raw materials for the abrasive mechanism 6.

[0035] Embodiment 9 On the basis of Embodiment 8, the calculation module one calculates based on the following formula one: K is the actual safety operation coefficient of the material storage mechanism 5, M1 is the maximum mass of a single neodymium iron boron permanent magnet material raw material, M2 is the minimum mass of a single neodymium iron boron permanent magnet material raw material, V1 is the maximum volume of a single neodymium iron boron permanent magnet material raw material, V2 is the minimum volume of a single neodymium iron boron permanent magnet material raw material, β is the Poisson's ratio of the neodymium iron boron permanent magnet material raw material, E is the elastic modulus of the neodymium iron boron permanent magnet material raw material, N is the number of stirring blades 58, ρ is the density of the neodymium iron boron permanent magnet material raw material, A is the surface area of a single stirring blade 58, H is the thickness of the stirring blade 58, g is the acceleration due to gravity, s1 is the rotational speed of the drive shaft 56, s2 is the flow rate of the neodymium iron boron permanent magnet material raw material in the storage chamber 51, K S is the resistance coefficient of the stirring blade 58, π is the pi, D is the spacing of the stirring blades 58, w is the angular velocity of the stirring blade 58, and R is the radius of the storage chamber 51.

[0036] The working principle and beneficial effects of the above technical solution are: By Calculate the actual safety operation coefficient of the storage mechanism 5. By comparing the actual safety operation coefficient of the storage mechanism 5 obtained by the first calculation module with the rated safety operation coefficient of the storage mechanism 5, when the actual safety operation coefficient of the storage mechanism 5 is less than or equal to the rated safety operation coefficient of the storage mechanism 5, the control module controls the alarm module to issue an alarm, and at the same time controls the storage mechanism 5 to stop working for maintenance. When the actual safety operation coefficient of the storage mechanism 5 is greater than the rated safety operation coefficient of the storage mechanism 5, the storage mechanism 5 normally provides raw materials for the abrasive mechanism 6.

[0037] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A particle preparation system for sintered Nd-Fe-B permanent magnetic materials, characterized in that: It includes a preparation tank (1). A feed pipe (2) is provided at the top of the preparation tank (1). A discharge pipe (3) is provided on the side wall of the preparation tank (1). A storage tank (4) is provided at the lower part of the preparation tank (1). A storage mechanism (5) for storing neodymium iron boron permanent magnet material, an abrasive mechanism (6) for grinding the neodymium iron boron permanent magnet material, and a screening mechanism (7) for screening the neodymium iron boron permanent magnet material particles are provided in the preparation tank (1). The feed pipe (2) is communicated with the feed inlet of the storage mechanism (5). The storage mechanism (5) is communicated with the abrasive mechanism (6). The abrasive mechanism (6) is communicated with the screening mechanism (7). The discharge port of the screening mechanism (7) is communicated with the discharge pipe (3).

2. The particle preparation system of a sintered neodymium iron boron permanent magnet material according to claim 1, characterized in that: The storage mechanism (5) includes a storage cavity (51) and a drive cavity (52). The storage cavity (51) and the drive cavity (52) are respectively provided in the preparation tank (1). A feed cavity (53) is provided below the storage cavity (51). The feed cavity (53) is communicated with the abrasive mechanism (6). A motor (54) is provided at the top of the preparation tank (1) corresponding to the upper part of the drive cavity (52). A bevel gear one (55) is provided at the drive end of the motor (54). The drive end of the motor (54) extends into the drive cavity (52). A drive shaft (56) is horizontally provided in the drive cavity (52). A bevel gear two (57) is provided in the middle of the drive shaft (56). The bevel gear one (55) and the bevel gear two (57) are meshed. One end of the drive shaft (56) extends into the storage cavity (51). Stirring blades (58) are spacedly provided on the part of the drive shaft (56) in the storage cavity (51).

3. A particle preparation system for a sintered neodymium iron boron permanent magnet material according to claim 2, characterized in that: The abrasive mechanism (6) includes a fixed cavity (61) which is arranged in the preparation box (1). A fixed groove (611) is formed at the bottom of the fixed cavity (61). An abrasive tank (62) is arranged in the fixed cavity (61). A first fixing ring (621) is fixedly arranged at the bottom of the abrasive tank (62). A second fixing ring (622) is arranged at the bottom of the first fixing ring (621). The second fixing ring (622) is inserted into the fixed groove (611). A washer (623) is arranged between the bottom of the fixing ring and the bottom of the fixed groove (611). An air delivery pipe (63) is arranged at the bottom of the fixed cavity (61). The part of the air delivery pipe (63) extending into the storage tank (4) is communicated with a multi-way pipe (64). The bottom of the multi-way pipe (64) is communicated with an air source (65) arranged in the storage tank (4). An inclined feeding pipe (624) is arranged in the middle of the side wall of the abrasive tank (62). A docking pipe (625) for docking with the feeding cavity (53) is arranged on the outer wall of the abrasive tank (62) corresponding to the inclined feeding pipe (624). A plurality of ball heads (69) are rotatably arranged at the lower part of the side wall of the abrasive tank (62). Avoidance grooves (691) are respectively formed on the inner and outer sides of the abrasive tank (62) where the ball heads (69) are located. Jet heads (692) and first air inlet pipes (693) are respectively arranged on the two sides of the ball heads (69) facing the inside and outside of the abrasive tank (62). An air inlet is formed at the bottom of the abrasive tank (62). A sieve plate (626) is arranged in the air inlet. The bottom of the air inlet is communicated with the top of the air delivery pipe (63). The first air inlet pipe (693) is communicated with the multi-way pipe (64) through a second air inlet pipe (694) arranged in the preparation box (1).

4. A particle preparation system for a sintered neodymium-iron-boron permanent magnet material according to claim 3, characterized in that: A sorting wheel (66) is rotatably arranged in the abrasive tank (62). A rotating shaft (67) is fixedly arranged on one side of the sorting wheel (66). The rotating shaft (67) passes through the side wall of the abrasive tank (62) and is fixedly connected with the other end of the driving shaft (56) in the fixed cavity (61). A hollow rotating assembly (68) which is communicated with the sorting wheel (66) is fixedly arranged in the side wall of the abrasive tank (62). The rotating assembly (68) includes a rotating end (681) and a fixed end (682). The rotating end (681) is rotatably connected with the fixed end (682). The fixed end (682) is fixedly arranged in the side wall of the abrasive tank (62). The other side of the sorting wheel (66) is inserted into the rotating end (681). The other end of the rotating end (681) passes through the side wall of the abrasive tank (62) and extends into the fixed cavity (61) to be communicated with the screening mechanism (7).

5. A particle preparation system for a sintered neodymium iron boron permanent magnet material according to claim 1, characterized in that: The screening mechanism (7) includes a material conveying pipe (71), which is horizontally arranged in the preparation box (1). One end of the material conveying pipe (71) is communicated with the discharge end of the abrasive mechanism (6), and the other end of the material conveying pipe (71) is tangentially communicated with a circular screening cavity (72). A rotating circular cavity (73) is arranged below the screening circular cavity, and an aggregate cavity (74) is arranged below the rotating circular cavity (73). An aggregate bucket (75) for manually collecting permanent magnet material particles is placed in the storage tank (4) below the aggregate cavity (74). An exhaust pipe (78) is fixedly arranged at the top of the preparation box (1) above the screening circular cavity. A wide pipe (76) is arranged at the bottom of the exhaust pipe (78). The other side of the screening circular cavity is communicated with the discharge pipe (3) through a discharge cavity (77).

6. The particle preparation system of a sintered neodymium iron boron permanent magnet material according to claim 1, characterized in that: An inspection door one (8) is arranged on the outer side of the preparation box (1) corresponding to the material storage mechanism (5).

7. A particle preparation system for a sintered neodymium iron boron permanent magnetic material according to claim 3, characterized in that: An inspection door two (81) is hingedly arranged at the top of the preparation box (1) above the fixed cavity (61).

8. A particle preparation system for a sintered neodymium iron boron permanent magnetic material according to claim 1, characterized in that: It further includes a speed detection module one for measuring the rotation speed of the drive shaft (56). A speed detection module two for measuring the flow rate of the neodymium iron boron permanent magnet material raw material in the material storage cavity (51). A speed detection module three for measuring the angular velocity of the stirring blades (58). A calculation module one for calculating the actual safety operation coefficient of the material storage mechanism (5) based on the rotation speed of the drive shaft (56); an alarm module for giving an alarm. A processing module for comparing and processing the actual safety operation coefficient of the material storage mechanism (5) obtained by the calculation module one with the rated safety operation coefficient of the material storage mechanism (5). A control module, when the actual safety operation coefficient of the material storage mechanism (5) is less than or equal to the rated safety operation coefficient of the material storage mechanism (5), controls the alarm module to give an alarm, and at the same time controls the material storage mechanism (5) to stop working for maintenance. When the actual safety operation coefficient of the material storage mechanism (5) is greater than the rated safety operation coefficient of the material storage mechanism (5), the material storage mechanism (5) normally provides raw materials for the abrasive mechanism (6).

9. The particle preparation system of a sintered neodymium iron boron permanent magnetic material according to claim 1, wherein: The calculation module one is calculated based on the following formula one: K is the actual safety operation coefficient of the material storage mechanism (5), M1 is the maximum mass of a single neodymium iron boron permanent magnet material raw material, M2 is the minimum mass of a single neodymium iron boron permanent magnet material raw material, V1 is the maximum volume of a single neodymium iron boron permanent magnet material raw material, V2 is the minimum volume of a single neodymium iron boron permanent magnet material raw material, β is the Poisson's ratio of the neodymium iron boron permanent magnet material raw material, E is the elastic modulus of the neodymium iron boron permanent magnet material raw material, N is the number of stirring blades (58), ρ is the density of the neodymium iron boron permanent magnet material raw material, A is the surface area of a single stirring blade (58), H is the thickness of the stirring blade (58), g is the acceleration due to gravity, s1 is the rotational speed of the drive shaft (56), s2 is the flow rate of the neodymium iron boron permanent magnet material raw material in the material storage chamber (51), K S is the resistance coefficient of the stirring blade (58), π is the pi, D is the spacing of the stirring blades (58), w is the angular velocity of the stirring blade (58), and R is the radius of the material storage chamber (51).

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