An air jet milling apparatus

Abstract

The application discloses an air flow crushing device and relates to the technical field of material crushing. The air flow crushing device comprises a barrel, a grading wheel rotationally connected with the barrel, and a sealing ring arranged in sequence along the axial direction of the grading wheel, the sealing ring and the barrel. The sealing ring is used for sealingly connecting the grading wheel and the barrel. The sealing ring comprises a first groove and a second groove. Along the axial direction of the grading wheel, the notch of the first groove faces the grading wheel, and the notch of the second groove faces the barrel. The inner wall of the first groove is used for sealingly matching with the grading wheel, and the inner wall of the second groove is used for sealingly matching with the barrel. The sealing ring is respectively provided with the first groove and the second groove, so that the sealing effect of the sealing ring can be improved, impurities can be prevented from existing between the grading wheel and the sealing ring and between the barrel and the sealing ring, the abrasion of the sealing ring caused by the impurities can be reduced, and the structural strength and service life of the sealing ring can be improved.

Description

Technical Field

[0001] This application relates to the field of material crushing technology, and in particular to an airflow crushing device. Background Technology

[0002] Airflow milling equipment is a type of pulverizing equipment that uses airflow to crush materials, processing coarse particles into fine powder. In airflow milling equipment, the classifying wheel and the feed cylinder move at relatively high speeds. The feed cylinder contains a large amount of powder, requiring a seal between the classifying wheel and the feed cylinder. Current sealing methods mostly use air seals; however, single-plane seals are sensitive to airflow disturbances. High-speed airflow can easily carry powder away from the gaps in the sealing surface, causing material loss and wear on the airflow milling equipment. Utility Model Content

[0003] This application provides an airflow pulverizing device that can solve the problems of poor sealing effect between the classifying wheel and the material cylinder, and easy wear of the sealing components.

[0004] In a first aspect, this application provides an airflow pulverizing device, comprising: a material cylinder; a classifying wheel rotatably connected to the material cylinder; and a sealing ring, wherein the classifying wheel, the sealing ring, and the material cylinder are arranged sequentially along the axial direction of the classifying wheel. The sealing ring is used to seal the connection between the classifying wheel and the material cylinder. The sealing ring includes a first groove and a second groove. Along the axial direction of the classifying wheel, the opening of the first groove faces the classifying wheel, and the opening of the second groove faces the material cylinder. The inner wall of the first groove is used for a sealing fit with the classifying wheel, and the inner wall of the second groove is used for a sealing fit with the material cylinder.

[0005] In the airflow pulverizing equipment provided in this application, a first groove and a second groove are respectively provided on both axial sides of the sealing ring. The inner wall of the first groove and the axial surface of the sealing ring facing the classifier wheel together form a sealing interface, and the inner wall of the second groove and the axial surface of the sealing ring facing the feed cylinder together form a sealing interface. When the fluid or impurities pass through the sealing interface, they need to undergo multiple turns, making the flow path of the fluid or impurities more complex. The fluid or impurities are blocked multiple times, increasing the flow resistance of the fluid or impurities, thereby improving the sealing effect of the sealing ring, preventing impurities from existing between the classifier wheel and the sealing ring, and between the feed cylinder and the sealing ring, reducing the wear of the sealing ring by impurities, and improving the structural strength and service life of the sealing ring.

[0006] In one possible implementation, the first groove and the second groove are annular, and the first groove, the second groove, and the classifier wheel are coaxially arranged. The projection of the bottom wall of the first groove along the axial direction of the classifier wheel at least partially coincides with the projection of the bottom wall of the second groove along the axial direction of the classifier wheel. The annular first and second grooves form continuous inner walls around the circumference of the sealing ring, increasing the area of ​​the sealing interface and increasing the length and tortuosity of the flow path of fluid or impurities when passing through the sealing interface, thereby improving the sealing effect of the sealing ring.

[0007] In one possible implementation, the ratio of the depth of the first groove along the axial direction of the classifier to the length of the sealing ring is in the range of 0.1 to 0.3, and / or, the ratio of the depth of the second groove along the axial direction of the classifier to the length of the sealing ring is in the range of 0.1 to 0.3. This design increases the length and tortuosity of the flow path of fluid or impurities through the sealing interface, thereby improving the sealing effect. Simultaneously, it avoids the accumulation of impurities inside the first or second groove due to excessive depth, which could affect the sealing performance of the sealing ring and the operational stability of the airflow pulverizer.

[0008] In one possible implementation, a first through hole is provided on the wall of the material cylinder near the classifying wheel. This first through hole penetrates the wall of the material cylinder near the classifying wheel along its axial direction and connects to the inner cavity of the material cylinder. A second through hole is provided on the sealing ring, penetrating the bottom walls of the first and second grooves along the axial direction of the classifying wheel. The second through hole, the first through hole, and the inner cavity are sequentially connected. The first through hole communicates with the inner cavity, allowing gas inside the inner cavity to exit through it. After exiting the first through hole, the gas enters the second through hole of the sealing ring, which communicates with the first through hole, and then exits through the second through hole into the gap between the classifying wheel and the sealing ring. The gas can blow out impurities such as materials that do not meet the sorting requirements from the gap between the classifying wheel and the sealing ring, while simultaneously preventing such materials and impurities from entering the material cylinder through the gap between the sealing ring and the classifying wheel, thus improving the sealing effect.

[0009] In one possible implementation, there are at least two first through holes, which are arranged at intervals along the circumference of the classifying wheel. Gas flows out from the inner cavity of the barrel. If one of the first through holes is blocked by impurities, the other first through holes can still communicate with the inner cavity of the barrel and the second through hole, ensuring that the gas flow is not affected. At the same time, providing at least two first through holes can improve the uniformity of airflow distribution and avoid stress concentration.

[0010] In one possible implementation, the inner cavity includes a first receiving cavity and a second receiving cavity, with the second receiving cavity sleeved outside the first receiving cavity. The first receiving cavity is used to receive materials, and the second receiving cavity is used to receive gas. The first through hole communicates with the second receiving cavity. The first through hole communicates with the second receiving cavity, and the second through hole communicates with the first through hole. Gas in the second receiving cavity is discharged sequentially through the first through hole, the second through hole, and the first groove, thereby preventing materials and impurities that do not meet the sorting requirements from entering the material cylinder through the gap between the sealing ring and the classifying wheel, thus improving the sealing effect.

[0011] In one possible implementation, the sidewall of the first groove away from the axis of the classifying wheel is inclined relative to the bottom wall of the first groove. This sidewall is inclined outwards from the sealing ring along the direction of the sealing ring towards the classifying wheel. This allows gas to be guided along this sidewall from inside the first groove to outside the sealing ring, preventing external material from entering the barrel through the gap between the sealing ring and the classifying wheel, thus improving the sealing effect between the sealing ring and the classifying wheel. Simultaneously, it prevents material accumulation in the first groove, reducing wear on the sealing ring.

[0012] In one possible implementation, a protrusion is provided on the side of the barrel near the sealing ring, and the protrusion is at least partially located within the second groove. The outer wall of the protrusion cooperates with the inner wall of the second groove to improve the stability of the connection between the sealing ring and the second groove. At the same time, the cooperation between the outer wall of the protrusion and the inner wall of the second groove can also form a sealing step, improving the sealing effect between the sealing ring and the barrel.

[0013] In one possible implementation, the sealing ring has a first mounting hole, the material cylinder has a second mounting hole, and the airflow pulverizing device includes a fixing member that passes through the first and second mounting holes to securely connect the sealing ring to the material cylinder. The fixing member passes sequentially through the first and second mounting holes, and the fixing member, the first mounting hole, and the second mounting hole cooperate to securely mount the sealing ring onto the material cylinder, improving the stability of the sealing ring and preventing it from shifting or falling off during operation of the airflow pulverizing device. Simultaneously, the stable connection between the sealing ring and the material cylinder maintains the state of the sealing surface, improving sealing performance.

[0014] In one possible implementation, the outer side of the fastener near the classifier wheel is covered with a tungsten carbide layer. Covering the outer side of the fastener near the classifier wheel with a tungsten carbide layer can reduce the degree of wear on the surface of the fastener, prevent the fastener from failing due to wear from the material, and ensure the long-term stable operation of the fastener. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the airflow pulverizing device provided in the embodiments of this application; Figure 2 This is a cross-sectional view of the airflow pulverizing device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the sealing ring of the airflow pulverizing device provided in the embodiments of this application; Figure 4 yes Figure 2 Enlarged view of the sealing ring in the image; Figure 5 yes Figure 2 Enlarged view of point A in the image; Figure 6 yes Figure 4 Enlarged view of point B in the image; Figure 7 yes Figure 2 Enlarged view of point C in the image; Figure 8 This is a schematic diagram of the fixing component of the airflow pulverizing device provided in the embodiments of this application.

[0016] Key reference numerals in the drawings: 10-Airflow pulverizer; 100-Cylinder; 110-First through hole; 120-Inner cavity; 130-Opening; 140-Protrusion; 150-Second mounting hole; 121-First receiving cavity; 122-Second receiving cavity; 200-Grading wheel; 210-Through hole; 220-Feed hole; 300-Sealing ring; 310-First groove; 320-Second groove; 330-Second through hole; 340-First sidewall; 350-Second sidewall; 360-First mounting hole; 400-Fixing component; 410-Tungsten carbide layer. Detailed Implementation

[0017] The embodiments of this application are described below with reference to the accompanying drawings.

[0018] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0019] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0020] It should be understood that the term "and / or" used in this document is merely a description of the same field in the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0021] It should be understood that the terms "first," "second," etc., used in this application are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "joining" should be interpreted broadly, for example, they can be fixed connections, detachable connections, mating connections or integral connections; those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] This application provides an airflow pulverizing device 10, which can pulverize materials into particles of the desired size through the high-speed impact of airflow. For example... Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the airflow pulverizing device 10 provided in the embodiments of this application. Figure 2 This is a cross-sectional view of the airflow pulverizing device 10 provided in the embodiments of this application. The airflow pulverizing device 10 includes a material cylinder 100, a classifying wheel 200, and a sealing ring 300. The classifying wheel 200 is rotatably connected to the material cylinder 100 and can rotate relative to the material cylinder 100.

[0024] In this embodiment, the grading wheel 200 is used to sort materials, and the material cylinder 100 is used to collect materials. Specifically, the grading wheel 200 has a through hole 210 extending through the grading wheel 200 along its axial direction. The through hole 210 communicates with the opening 130 of the material cylinder 100, allowing materials to enter the material cylinder 100 through the through hole 210 from the opening 130. The side wall of the grading wheel 200 has a feed hole 220 that extends radially through the side wall of the grading wheel and communicates with the through hole 210.

[0025] When the classifying wheel 200 rotates, materials that meet the sorting requirements enter the through hole 210 of the classifying wheel 200 through the feed hole 220, and then enter the material cylinder 100 through the through hole 210. Materials that do not meet the sorting requirements cannot enter the through hole 210 of the classifying wheel 200 due to centrifugal force and the upward airflow generated by the previous process, and are thus returned for further crushing.

[0026] In some other embodiments, the number of feed holes 220 is at least two, and the at least two feed holes 220 are arranged at circumferential intervals along the classifier wheel 200. It is understood that the number of feed holes 220 can be adaptively designed to ensure the accuracy of material classification.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the sealing ring 300 of the airflow pulverizing device 10 provided in the embodiments of this application. Figure 4 yes Figure 2 An enlarged view of the sealing ring 300. The classifier 200, sealing ring 300, and material cylinder 100 are arranged sequentially along the axial direction of the classifier 200. The sealing ring 300 is used to seal the connection between the classifier 200 and the material cylinder 100. The sealing ring 300 includes a first groove 310 and a second groove 320. Along the axial direction of the classifier 200, the opening of the first groove 310 faces the classifier 200, and the opening of the second groove 320 faces the material cylinder 100. The inner wall of the first groove 310 is used for a sealing fit with the classifier 200, and the inner wall of the second groove 320 is used for a sealing fit with the material cylinder 100.

[0028] In this embodiment, the axial direction of the classifying wheel 200 is the X direction. Along the X direction, a sealing ring 300 is located between the classifying wheel 200 and the material cylinder 100. The sealing ring 300 is used to seal and connect the classifying wheel 200 and the material cylinder 100. A first groove 310 and a second groove 320 are respectively disposed on two wall surfaces of the sealing ring 300 along the X direction. The opening of the first groove 310 faces the classifying wheel 200, and the opening of the second groove 320 faces the material cylinder 100.

[0029] The sealing ring 300 is fixedly connected to the material cylinder 100. The classifying wheel 200 rotates relative to the sealing ring 300, and there is a gap between the classifying wheel 200 and the sealing ring 300. The axial surface of the sealing ring 300 in the opposite X direction and the inner wall of the first groove 310 together form a sealing interface. The inner wall of the first groove 310 includes the side wall and the bottom wall of the first groove 310. When the classifying wheel 200 rotates, the relative movement between the classifying wheel 200 and the sealing ring 300 causes the fluid or impurities between the classifying wheel 200 and the sealing ring 300 to have to undergo multiple turns before flowing through the axial surface of the sealing ring 300 in the opposite X direction and the inner wall of the first groove 310. The flow path of the fluid or impurities is more complex, and the fluid or impurities are blocked multiple times, thereby increasing the flow resistance of the fluid or impurities, improving the sealing effect between the sealing ring 300 and the classifying wheel 200, preventing external materials and other impurities that do not meet the sorting requirements from entering the material cylinder 100 through the gap between the classifying wheel 200 and the sealing ring 300, and also preventing materials that meet the sorting requirements from escaping from the gap between the classifying wheel 200 and the sealing ring 300 inside the material cylinder 100.

[0030] The sealing ring 300 is fixedly connected to the material cylinder 100. The axial surface of the sealing ring 300 in the positive X direction and the inner wall of the second groove 320 together form a sealing interface. The inner wall of the second groove 320 includes its sidewalls and bottom wall. Fluid or impurities need to undergo multiple turns before flowing through the axial surface of the sealing ring 300 in the positive X direction and the inner wall of the second groove 320. The flow path of the fluid or impurities is more complex, and the fluid or impurities are blocked multiple times, thereby increasing the flow resistance of the fluid or impurities and improving the sealing effect between the sealing ring 300 and the classifying wheel 200. This prevents external materials and impurities that do not meet the sorting requirements from entering the material cylinder 100 through the gap between the material cylinder 100 and the sealing ring 300, and also prevents materials that meet the sorting requirements from escaping from the gap between the material cylinder 100 and the sealing ring 300.

[0031] In the airflow pulverizing equipment provided in this application, a first groove 310 and a second groove 320 are respectively provided on both axial sides of the sealing ring 300. The inner wall of the first groove 310 and the axial surface of the sealing ring 300 facing the classifier 200 together form a sealing interface, and the inner wall of the second groove 320 and the axial surface of the sealing ring 300 facing the feed cylinder 100 together form a sealing interface. When the fluid or impurities pass through the sealing interface, they need to undergo multiple turns, making the flow path of the fluid or impurities more complex. The fluid or impurities are blocked multiple times, increasing the flow resistance of the fluid or impurities, thereby improving the sealing effect of the sealing ring 300, preventing impurities from existing between the classifier 200 and the sealing ring 300, and between the feed cylinder 100 and the sealing ring 300, reducing the wear of the sealing ring 300 by impurities, and improving the structural strength and service life of the sealing ring 300.

[0032] In some other embodiments, the grading wheel 200 is connected to a drive component at one axial end opposite to the material cylinder 100, and the drive component drives the grading wheel 200 to rotate relative to the material cylinder 100. Exemplarily, the drive component includes a drive motor, the motor shaft of which is connected to the grading wheel 200. The drive motor drives the grading wheel 200 to rotate, generating centrifugal force, thereby achieving material sorting under the drive of the grading wheel 200. The rotational speed at which the drive motor drives the grading wheel 200 can be arbitrarily adjusted.

[0033] In some other embodiments, the classifying wheel 200 is made of ceramic materials such as alumina, zirconium oxide, silicon nitride, or silicon carbide. Ceramic materials have good wear resistance, which can reduce the degree of wear between the classifying wheel 200 and the material, and extend the service life of the classifying wheel 200.

[0034] In some other embodiments, the sealing ring 300 is made of ceramic materials such as alumina, zirconium oxide, silicon nitride, or silicon carbide. Ceramic materials have good wear resistance, which can reduce the degree of wear between the sealing ring 300 and the material, and extend the service life of the sealing ring 300.

[0035] One possible implementation, such as Figure 2 , Figure 3 and Figure 4 As shown, the first groove 310 and the second groove 320 are annular, and the first groove 310, the second groove 320 and the grading wheel 200 are coaxially arranged.

[0036] In this embodiment, the sealing ring 300 forms a sealing interface on its axial surface in the opposite X direction and the inner wall of the first groove 310. Similarly, the sealing ring 300 forms a sealing interface on its axial surface in the positive X direction and the inner wall of the second groove 320. Both the first groove 310 and the second groove 320 are annular, forming a continuous inner wall around the circumference of the sealing ring 300. This increases the area of ​​the sealing interface, increasing the flow path length and tortuosity of fluids or impurities passing through it, thereby improving the sealing effect of the sealing ring 300. Simultaneously, the classifier wheel 200 rotates relative to the sealing ring 300. The coaxial arrangement of the annular first groove 310, the annular second groove 320, and the classifier wheel 200 better accommodates the rotational movement of the classifier wheel 200, ensuring that the sealing effect is not affected by the rotation of the classifier wheel 200.

[0037] The projection of the bottom wall of the first groove 310 along the axial direction of the classifier 200 at least partially coincides with the projection of the bottom wall of the second groove 320 along the axial direction of the classifier 200. The openings of the first groove 310 and the second groove 320 are opposite to each other. The fact that the projections of the bottom wall of the first groove 310 along the axial direction of the classifier 200 and the bottom wall of the second groove 320 at least partially coincide ensures that the first groove 310 and the second groove 320 share a common bottom wall, which facilitates the installation of a structure in the first groove 310 and the second groove 320 that better seals and fits with the classifier 200 and the material cylinder 100.

[0038] In one embodiment, the projection of the bottom wall of the first groove 310 along the axial direction of the grader 200 completely coincides with the projection of the bottom wall of the second groove 320 along the axial direction of the grader 200. That is, the inner diameter of the first groove 310 is equal to the inner diameter of the second groove 320, and the outer diameter of the first groove 310 is equal to the outer diameter of the second groove 320. The groove width of the first groove 310 along the radial direction of the sealing ring 300 is equal to the groove width of the second groove 320 along the radial direction of the sealing ring 300.

[0039] In some other embodiments, the projection of the bottom wall of the first groove 310 along the axial direction of the grader 200 lies within the projection of the bottom wall of the second groove 320 along the axial direction of the grader 200, that is, the groove width of the first groove 310 along the radial direction of the sealing ring 300 is smaller than the groove width of the second groove 320 along the radial direction of the sealing ring 300.

[0040] In some other embodiments, the projection of the bottom wall of the second groove 320 along the axial direction of the grader wheel 200 is located within the projection of the bottom wall of the first groove 310 along the axial direction of the grader wheel 200, that is, the groove width of the second groove 320 along the radial direction of the sealing ring 300 is smaller than the groove width of the first groove 310 along the radial direction of the sealing ring 300.

[0041] In one possible implementation, the ratio of the depth of the first groove 310 along the axial direction of the grader 200 to the length of the sealing ring 300 is in the range of 0.1 to 0.3, and / or the ratio of the depth of the second groove 320 along the axial direction of the grader 200 to the length of the sealing ring 300 is in the range of 0.1 to 0.3.

[0042] In one embodiment, such as Figure 2 and Figure 6 As shown, Figure 6 yes Figure 4In the enlarged view at point B, the ratio of the depth of the first groove 310 along the axial direction of the grader 200 to the length of the sealing ring 300 is in the range of 0.1 to 0.3. The depth of the first groove 310 along the axial direction of the grader 200 is L1, and the length of the sealing ring 300 along the axial direction of the grader 200 is L2. The ratio of L1 to L2 is in the range of 0.1 to 0.3. For example, the ratio of L1 to L2 can be, but is not limited to, 0.1, 0.15, 0.2, 0.25, or 0.3. For example, the ratio of L1 to L2 is 0.2, where the depth L1 of the first groove 310 along the axial direction of the grader 200 is 2 mm, and the length L2 of the sealing ring 300 along the axial direction of the grader 200 is 10 mm. The sealing ring 300 forms a sealing interface together with the axial surface in the opposite X direction and the inner wall of the first groove 310. A ratio of L1 to L2 within the range of 0.1 to 0.3 can increase the flow path length and tortuosity of fluid or impurities passing through this sealing interface, thereby improving the sealing effect. Simultaneously, a ratio of L1 to L2 within the range of 0.1 to 0.3 can prevent impurities from accumulating inside the first groove 310 due to excessive depth, thus avoiding impacts on the sealing performance of the sealing ring 300 and the operational stability of the airflow pulverizer.

[0043] In one embodiment, such as Figure 2 and Figure 6 As shown, the ratio of the depth of the second groove 320 along the axial direction of the grader 200 to the length of the sealing ring 300 is in the range of 0.1 to 0.3. The depth of the second groove 320 along the axial direction of the grader 200 is L3, and the length of the sealing ring 300 along the axial direction of the grader 200 is L2, with the ratio of L3 to L2 in the range of 0.1 to 0.3. For example, the ratio of L2 to L2 can be, but is not limited to, 0.1, 0.15, 0.2, 0.25, or 0.3. Exemplarily, the ratio of L3 to L2 is 0.2, wherein the depth L3 of the second groove 320 along the axial direction of the grader 200 is 2 mm, and the length L2 of the sealing ring 300 along the axial direction of the grader 200 is 10 mm. The sealing ring 300 forms a sealing interface together with the axial surface in the positive X direction and the inner wall of the second groove 320. A ratio of L3 to L2 within the range of 0.1 to 0.3 can increase the flow path length and tortuosity of fluid or impurities passing through this sealing interface, thereby improving the sealing effect. Simultaneously, a ratio of L3 to L2 within the range of 0.1 to 0.3 can prevent impurities from accumulating inside the second groove 320 due to the first groove 310 being too deep, thus avoiding affecting the sealing performance of the sealing ring 300 and the operational stability of the airflow pulverizer.

[0044] In one embodiment, the ratio of the depth of the first groove 310 along the axial direction of the grader 200 to the length of the sealing ring 300 is in the range of 0.1 to 0.3, and the ratio of the depth of the second groove 320 along the axial direction of the grader 200 to the length of the sealing ring 300 is in the range of 0.1 to 0.3.

[0045] It is understandable that the depth L1 of the first groove 310 along the axial direction of the grader 200 and the depth L3 of the second groove 320 along the axial direction of the grader 200 can be the same or different.

[0046] One possible implementation, such as Figure 2 and Figure 4 As shown, a first through hole 110 is provided on the wall of the material cylinder 100 near the classifier 200. The first through hole 110 passes through the wall of the material cylinder 100 near the classifier 200 along the axial direction of the classifier 200 and is used to connect the inner cavity 120 of the material cylinder 100. A second through hole 330 is provided on the sealing ring 300. The second through hole 330 passes through the bottom wall of the first groove 310 and the bottom wall of the second groove 320 along the axial direction of the classifier 200. The second through hole 330, the first through hole 110 and the inner cavity 120 are connected in sequence.

[0047] In this embodiment, the material cylinder 100 includes an inner cavity 120, which can be used to contain gas. The wall surface of the material cylinder 100 near the classifier 200 is the wall surface of the material cylinder 100 in the X-direction opposite direction, and the first through hole 110 penetrates the wall surface of the material cylinder 100 in the X-direction opposite direction along the X direction. The first through hole 110 communicates with the inner cavity 120, and the gas in the inner cavity 120 can be discharged from the inner cavity 120 through the first through hole 110. After the gas flows out of the first through hole 110, it enters the second through hole 330 of the sealing ring 300, which communicates with the first through hole 110, and then is discharged from the second through hole 330 to the gap between the classifier 200 and the sealing ring 300. The gas can blow out impurities such as materials that do not meet the sorting requirements in the gap between the classifier 200 and the sealing ring 300, and at the same time, it can prevent materials such as materials that do not meet the sorting requirements from entering the interior of the material cylinder 100 through the gap between the sealing ring 300 and the classifier 200, thereby improving the sealing effect.

[0048] Understandably, in this embodiment, the second through hole 330 penetrates the bottom wall of the first groove 310 and the second groove 320 along the axial direction of the grader 200, and the opening of the second through hole 330 is located in the first groove 310 and the second groove 320, respectively. By setting the second through hole 330 in the first groove 310 and the second groove 320, the space within the first groove 310 and the second groove 320 can be utilized, avoiding the need to set the second through hole 330 at other positions along the radial direction of the sealing ring 300.

[0049] In some other embodiments, the second through hole 330 and the first through hole 110 are coaxially arranged.

[0050] One possible implementation, such as Figure 3 As shown, there are at least two first through holes 110, which are arranged at intervals along the circumference of the classifier wheel 200. The first through holes 110 connect to the inner cavity 120 of the barrel 100. The presence of at least two first through holes allows gas in the inner cavity 120 of the barrel 100 to flow out through more of the first through holes 110. If one first through hole 110 is blocked by impurities, the other first through holes 110 can still connect to the inner cavity 120 of the barrel 100 and the second through hole 330, ensuring that the gas flow is not affected. Simultaneously, providing at least two first through holes 110 improves the uniformity of airflow distribution and avoids stress concentration.

[0051] In some other embodiments, the number of second through holes 330 is at least two, and the at least two second through holes 330 are arranged at intervals along the circumference of the classifier wheel 200. The second through holes 330 are used to connect with the first through hole 110. Gas flows out from the inner cavity 120 of the barrel 100. If one of the second through holes 330 is blocked by impurities, the other second through holes 330 can still connect with the inner cavity 120 of the barrel 100 and the first through hole 110, ensuring that the gas flow is not affected. At the same time, providing at least two second through holes 330 can improve the uniformity of airflow distribution and avoid stress concentration.

[0052] One possible implementation, such as Figure 2 and Figure 5 As shown, Figure 5 yes Figure 2 The enlarged view at point A shows that the inner cavity 120 includes a first receiving cavity 121 and a second receiving cavity 122. The second receiving cavity 122 is sleeved outside the first receiving cavity 121. The first receiving cavity 121 is used to receive materials, and the second receiving cavity 122 is used to receive gas. The first through hole 110 communicates with the second receiving cavity 122.

[0053] In this embodiment, the second receiving cavity 122 is sleeved outside the first receiving cavity 121, and the second receiving cavity 122 and the first receiving cavity 121 are coaxially arranged, thus forming a nested structure. The first receiving cavity 121 is used to receive materials, and the materials after being classified by the classifying wheel 200 enter the first receiving cavity 121. The second receiving cavity 122 is used to receive gas, which is contained in the space formed by the outer wall of the first receiving cavity 121 and the inner wall of the second receiving cavity 122. The first through hole 110 communicates with the second receiving cavity 122, and the second through hole 330 communicates with the first through hole 110. The gas in the second receiving cavity 122 is discharged sequentially through the first through hole 110, the second through hole 330, and the first groove 310, thereby preventing impurities such as materials that do not meet the sorting requirements from entering the material cylinder 100 through the gap between the sealing ring 300 and the classifying wheel 200, thus improving the sealing effect.

[0054] In some other embodiments, the barrel 100 includes an opening 130, which is connected to the first receiving cavity 121. The opening 130 is located on the side of the barrel 100 facing the sealing ring 300. The opening 130 is used to connect to the first receiving cavity 121 of the classifying wheel 200. The material sorted by the classifying wheel 200 enters the first receiving cavity 121 through the opening 130 for storage.

[0055] In some other embodiments, the inner diameter of the second through hole 330 is the same as the inner diameter of the first through hole 110. When the gas passes through the first through hole 110 and the second through hole 330, the flow rate and pressure loss in the first through hole 110 and the second through hole 330 are consistent, and the airflow distribution is more uniform.

[0056] In some other embodiments, the inner diameter of the second through hole 330 is smaller than the distance between the two sidewalls of the first groove 310 along the radial direction of the sealing ring 300; or, the first groove 310 is annular, and the inner diameter of the second through hole 330 is smaller than the difference between the outer diameter and the inner diameter of the first groove 310. The inner diameter of the first through hole 110 is smaller than the inner diameter of the second receiving cavity 122. The gas in the second receiving cavity 122 is discharged sequentially through the first through hole 110, the second through hole 330, and the first groove 310. The second receiving cavity 122, the first through hole 110, the second through hole 330, and the first groove 310 form a Laval tube structure, which can accelerate the gas flow rate. The gas forms a strong impact force and coverage at the opening of the first groove 310, thereby better preventing impurities such as materials that do not meet the sorting requirements from entering the material cylinder 100 through the gap between the sealing ring 300 and the classifying wheel 200, thus improving the sealing effect.

[0057] One possible implementation, such as Figure 2 , Figure 4 and Figure 6As shown, the sidewall of the first groove 310 away from the axis of the classifier 200 is inclined relative to the bottom wall of the first groove 310, and the sidewall is inclined outward from the sealing ring 300 in the direction of the sealing ring 300 toward the classifier 200. In the embodiment of this application, the outer side of the sealing ring 300 refers to the radial outer side of the sealing ring 300. The axis of the classifier 200 is in Figure 6 As shown in dashed lines, the first groove 310 has a bottom wall and two side walls arranged radially opposite to each other along the classifier wheel 200, namely a first side wall 340 and a second side wall 350. The side wall of the first groove 310 away from the axis of the classifier wheel 200 is the first side wall 340, and the side wall of the first groove 310 closer to the axis of the classifier wheel 200 is the second side wall 350. The side wall of the first groove 310 away from the axis of the classifier wheel 200 is inclined relative to the bottom wall of the first groove 310, that is, the first side wall 340 is inclined relative to the bottom wall of the first groove 310. The first side wall 340 is inclined outward from the sealing ring 300 in the direction of the sealing ring 300 toward the classifier wheel 200. The first side wall 340 gradually moves closer to the outer edge of the sealing ring 300 during the inclination process.

[0058] Gas flows out from the second receiving cavity 122, and flows sequentially through the first through hole 110 and the second through hole 330 into the first groove 310. The first groove 310 is connected to the gap between the sealing ring 300 and the classifying wheel 200. The first sidewall 340 of the first groove 310 is inclined outward from the sealing ring 300 in the direction from the sealing ring 300 towards the classifying wheel 200, which can guide the gas to spray outward from the first groove 310 along the first sidewall 340, thereby preventing external material from entering the material cylinder 100 from the gap between the sealing ring 300 and the classifying wheel 200, and improving the sealing effect between the sealing ring 300 and the classifying wheel 200. At the same time, it can prevent material from accumulating in the first groove 310 and reduce wear on the sealing ring 300.

[0059] In one possible implementation, the angle between the inclination direction of the first sidewall 340 and the axial direction of the grading wheel 200 is in the range of 30° to 45°. For example... Figure 6 As shown, the angle between the inclined direction of the first sidewall 340 and the axial direction of the classifier wheel 200 is called angle α. Angle α is in the range of 30° to 45°, which better guides the gas along the first sidewall 340 out of the first groove 310 and prevents external materials from entering. Angle α is in the range of 30° to 45°; it can be 30°, 40°, or 45°. In this embodiment, angle α is 30°.

[0060] One possible implementation, such as Figure 2 and Figure 5As shown, a protrusion 140 is provided on the side of the barrel 100 near the sealing ring 300, and the protrusion 140 is at least partially located within the second groove 320. In this embodiment, the side of the barrel 100 near the sealing ring 300 is the side of the barrel 100 in the opposite X direction, and the protrusion 140 is provided on this side of the barrel 100 near the sealing ring 300. The protrusion 140 extends from the side of the barrel 100 in the opposite X direction toward the sealing ring 300. The protrusion 140 is at least partially located within the second groove 320, or it may be entirely located within the second groove 320 or partially located within the second groove 320. The outer wall of the protrusion 140 and the inner wall of the second groove 320 cooperate with each other to improve the stability of the connection between the sealing ring 300 and the second groove 320. At the same time, the cooperation between the outer wall of the protrusion 140 and the inner wall of the second groove 320 can also form a sealing step, improving the sealing effect between the sealing ring 300 and the barrel 100.

[0061] In some other embodiments, the number of protrusions 140 is at least two, and the at least two protrusions 140 are arranged at intervals along the circumference of the barrel 100. For example, the at least two protrusions 140 are evenly spaced along the circumference of the barrel 100.

[0062] In some other embodiments, the protrusion 140 is an annular protrusion, and the annular protrusion 140 is coaxially arranged with the material cylinder 100. The second groove 320 is also annular, and the second groove 320 is coaxially arranged with the material cylinder 100. The second groove 320, the protrusion 140 and the material cylinder 100 are all coaxially arranged, which facilitates the placement of the protrusion 140 within the second groove 320.

[0063] One possible implementation, such as Figure 2 , Figure 5 and Figure 7 As shown, Figure 7 yes Figure 2 The enlarged view at point C shows that the sealing ring 300 is provided with a first mounting hole 360, the material cylinder 100 is provided with a second mounting hole 150, and the airflow pulverizing device 10 includes a fixing member 400, which passes through the first mounting hole 360 ​​and the second mounting hole 150 to fix the sealing ring 300 and the material cylinder 100.

[0064] In this embodiment, the first mounting hole 360 ​​is a through hole that extends through the sealing ring 300 along its axial direction. The second mounting hole 150 can be either a through hole or a blind hole, with its opening facing the sealing ring 300. The fixing member 400 passes sequentially through the first mounting hole 360 ​​and the second mounting hole 150. The fixing member 400, the first mounting hole 360, and the second mounting hole 150 cooperate to fix the sealing ring 300 onto the feed cylinder 100, improving the stability of the sealing ring 300 and preventing it from shifting or falling off during operation of the airflow pulverizing equipment. Simultaneously, the stable connection between the sealing ring 300 and the feed cylinder 100 maintains the state of the sealing surface, improving sealing performance.

[0065] In some other embodiments, such as Figure 3 As shown, there are at least two first mounting holes 360, which are evenly distributed along the circumference of the sealing ring 300. There are at least two second mounting holes 150, which are evenly distributed along the circumference of the barrel 100. Thus, the first mounting holes 360 and the second mounting holes 150 cooperate with each other to improve the stability of the fixed connection between the sealing ring 300 and the barrel 100 and avoid local stress concentration.

[0066] In some other embodiments, the fastener 400 includes, but is not limited to, screws or pins. For example, the fastener 400 is a screw, and both the first mounting hole 360 ​​and the second mounting hole 150 are threaded holes; or, the fastener 400 is a pin, and both the first mounting hole 360 ​​and the second mounting hole 150 are pin holes.

[0067] One possible implementation, such as Figure 2 and Figure 8 As shown, Figure 8 This is a schematic diagram of the fixing member 400 of the air jet mill 10 provided in this application embodiment. At least a portion of the outer side of the fixing member 400 is covered with a tungsten carbide layer 410. The tungsten carbide layer 410 has extremely strong wear resistance. During the operation of the air jet mill 10, the fixing member 400 may be exposed to high-speed moving materials or impurities. Covering the outer side of the fixing member 400 with at least a portion of the tungsten carbide layer 410 can reduce the degree of wear on the surface of the fixing member 400 and extend the service life of the fixing member 400.

[0068] It is understood that in the embodiments of this application, the outer side of the fastener 400 refers to the outer surface of the fastener 400. Even after the fastener 400 is housed in the first mounting hole 360 ​​and the second mounting hole 150, the outer surface of the part of the fastener 400 located in the first mounting hole 360 ​​and the second mounting hole 150 also belongs to the outer side of the fastener 400.

[0069] One possible implementation, such as Figure 2 and Figure 8 As shown, the outer side of the fixing member 400 near the classifying wheel 200 is covered with a tungsten carbide layer 410. After the fixing member 400 passes through the first mounting hole 360 ​​to fix the sealing ring 300 and the material cylinder 100, the fixing member 400 is close to the classifying wheel 200 on the opposite side of the X direction. When the classifying wheel 200 sorts materials, materials that do not meet the sorting requirements of the classifying wheel 200 will enter the gap between the classifying wheel 200 and the sealing ring 300. There is a risk of friction between the outer side of the fixing member 400 near the classifying wheel 200 and the materials. Covering the outer side of the fixing member 400 near the classifying wheel 200 with a tungsten carbide layer 410 can reduce the wear on the surface of the fixing member 400, prevent the fixing member 400 from failing due to wear from the materials, and ensure the long-term stable operation of the fixing member 400.

[0070] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An airflow pulverizing device (10), characterized in that, include: Material cylinder (100); The grading wheel (200) is rotatably connected to the material cylinder (100); A sealing ring (300) is arranged in sequence along the axial direction of the grading wheel (200). The grading wheel (200), the sealing ring (300), and the material cylinder (100) are used to seal and connect the grading wheel (200) and the material cylinder (100). The sealing ring (300) includes a first groove (310) and a second groove (320). Along the axial direction of the grading wheel (200), the opening of the first groove (310) faces the grading wheel (200), and the opening of the second groove (320) faces the material cylinder (100). The inner wall of the first groove (310) is used for sealing and fitting with the grading wheel (200), and the inner wall of the second groove (320) is used for sealing and fitting with the material cylinder (100).

2. The airflow pulverizing device (10) according to claim 1, characterized in that, The first groove (310) and the second groove (320) are annular. The first groove (310), the second groove (320) and the grading wheel (200) are coaxially arranged. The projection of the bottom wall of the first groove (310) along the axial direction of the grading wheel (200) at least partially coincides with the projection of the bottom wall of the second groove (320) along the axial direction of the grading wheel (200).

3. The airflow pulverizing device (10) according to claim 1, characterized in that, The ratio of the depth of the first groove (310) along the axial direction of the grader (200) to the length of the sealing ring (300) is in the range of 0.1 to 0.3, and / or the ratio of the depth of the second groove (320) along the axial direction of the grader (200) to the length of the sealing ring (300) is in the range of 0.1 to 0.

3.

4. The airflow pulverizing apparatus (10) according to any one of claims 1-3, characterized in that, The barrel (100) has a first through hole (110) on the wall near the classifier (200). The first through hole (110) passes through the wall near the classifier (200) along the axial direction of the classifier (200) and is used to connect the inner cavity (120) of the barrel (100). The sealing ring (300) has a second through hole (330). The second through hole (330) passes through the bottom wall of the first groove (310) and the bottom wall of the second groove (320) along the axial direction of the classifier (200). The second through hole (330), the first through hole (110) and the inner cavity (120) are connected in sequence.

5. The airflow pulverizing device (10) according to claim 4, characterized in that, The number of the first through holes (110) is at least two, and the first through holes (110) are arranged at intervals along the circumference of the grader wheel (200).

6. The airflow pulverizing device (10) according to claim 4, characterized in that, The inner cavity (120) includes a first receiving cavity (121) and a second receiving cavity (122). The second receiving cavity (122) is sleeved on the outside of the first receiving cavity (121). The first receiving cavity (121) is used to receive materials, and the second receiving cavity (122) is used to receive gas. The first through hole (110) communicates with the second receiving cavity (122).

7. The airflow pulverizing apparatus (10) according to any one of claims 1-3, characterized in that, The sidewall of the first groove (310) away from the axis of the grader wheel (200) is inclined relative to the bottom wall of the first groove (310), and the sidewall is inclined outward of the sealing ring (300) in the direction of the sealing ring (300) toward the grader wheel (200).

8. The airflow pulverizing apparatus (10) according to any one of claims 1-3, characterized in that, The barrel (100) has a protrusion (140) on the side near the sealing ring (300), and the protrusion (140) is at least partially located in the second groove (320).

9. The airflow pulverizing apparatus (10) according to any one of claims 1-3, characterized in that, The sealing ring (300) is provided with a first mounting hole (360), the material cylinder (100) is provided with a second mounting hole (150), and the airflow pulverizing device (10) includes a fixing member (400). The fixing member (400) passes through the first mounting hole (360) and the second mounting hole (150) to fix the sealing ring (300) and the material cylinder (100).

10. The airflow pulverizing device (10) according to claim 9, characterized in that, The fastener (400) is covered with a tungsten carbide layer (410) on the outer side near the grader wheel (200).

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