A new type of powder selecting rotor assembly and a powder classifier with the same
By designing a new type of powder classifier rotor assembly, and adopting a multi-inlet and multi-outlet structure as well as baffles to block airflow, the problem of insufficient powder residence time in existing powder classifiers has been solved, thereby improving powder classification efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN XINDA FIVE STAR ENERGY SAVING TECHNOLOGY CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-06-26
AI Technical Summary
Existing air classifiers cannot extend the residence time of powder in the classification zone under the same air volume and gas-solid ratio conditions, resulting in difficulty in improving classification efficiency.
A novel powder sorting rotor assembly is designed. By increasing the height-to-diameter ratio, adding a feeding unit, and setting baffles between rotors to block airflow, the residence time of powder in the sorting zone is extended. A multi-inlet and multi-outlet structure is adopted for multiple sorting.
Under the same air volume and gas-solid ratio conditions, extending the residence time of powder in the classifier zone improves the classifier's sorting efficiency.
Smart Images
Figure CN224405763U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of powder classifier technology, specifically to a novel powder classifier rotor assembly and a powder classifier having the powder classifier rotor assembly. Background Technology
[0002] Currently, the height-to-diameter ratio of a classifier rotor is typically determined by considering that the resistance of the rotor outlet and the connected duct is within a reasonable range. This means a certain airflow corresponds to a specific outlet diameter, and there is only one outlet. With a fixed airflow velocity entering the rotor, the rotor height is essentially fixed, which in turn determines the time the powder to be classified can pass through the classification zone. Consequently, the classifier's efficiency can also be determined. Therefore, under the same airflow and gas-solid ratio, it is difficult to extend the residence time of the powder in the classification zone, thus hindering the improvement of the classifier's efficiency. Utility Model Content
[0003] To address the problem that air classifiers struggle to improve their efficiency under the same air volume and gas-solid ratio conditions, this invention provides a novel air classifier rotor assembly. By increasing the height-to-diameter ratio and adding a feeding unit, the residence time of the powder to be classified in the classification zone is extended, thereby improving the air classifier's efficiency.
[0004] The technical solution adopted in this utility model is:
[0005] This utility model provides a novel powder classifier rotor assembly, comprising:
[0006] The upper classifying rotor has multiple upper air inlets circumferentially opened on its side wall with its own central axis as the rotation axis; the top of the upper classifying rotor has an upper air outlet;
[0007] The lower classifying rotor has multiple lower air inlets circumferentially opened on its side wall with its own central axis as the rotation axis; the bottom of the lower classifying rotor has a lower air outlet.
[0008] A partition is disposed between the upper classifying rotor and the lower classifying rotor, with one side connected to the bottom of the upper classifying rotor and the other side connected to the top of the lower classifying rotor, for the purpose of blocking the internal gas flow between the upper classifying rotor and the lower classifying rotor.
[0009] Wherein, the projected area of the partition in the axial direction at least covers the projected area of the upper powder classifier rotor and / or the lower powder classifier rotor in the axial direction.
[0010] In one embodiment of this application, the partition is a blind plate or a perforated plate.
[0011] In one embodiment of this application, a primary feeding disc is provided on the outer top of the upper powder classifier rotor to collect the initial powder and throw the initial powder in a throwing motion away from the central axis of the upper powder classifier rotor.
[0012] In one embodiment of this application, a secondary feeding disc is provided on the outer top of the partition plate to collect the secondary powder falling from the primary feeding disc and to throw the secondary powder in a throwing manner away from the central axis of the lower powder separator rotor.
[0013] This application also provides a classifier, including the novel classifier rotor assembly described above. The classifier has a first discharge pipe and a second discharge pipe inside. The upper air outlet of the upper classifier rotor is connected to the first discharge pipe, and the lower air outlet of the lower classifier rotor is connected to the second discharge pipe.
[0014] In one embodiment of this application, the air classifier further includes a drive component, which specifically includes:
[0015] The motor has a rotor shaft at its output end. The other end of the rotor shaft passes through the wall of the first discharge pipe and extends into the interior of the upper powder-selecting rotor, or the other end of the rotor shaft passes through the wall and partition of the first discharge pipe and extends into the interior of the lower powder-selecting rotor. A connecting frame is provided on the outer wall of the rotor shaft to connect with the upper powder-selecting rotor and / or the lower powder-selecting rotor.
[0016] In one embodiment of this application, the upper powder classifier rotor, the lower powder classifier rotor, and the rotor shaft are coaxially arranged.
[0017] In one embodiment of this application, the air classifier further includes: an airflow guide vane assembly disposed around the air classifier rotor assembly; wherein,
[0018] The airflow guide vane assembly has an upper airflow channel and a lower airflow channel;
[0019] The airflow direction formed by the upper air guide channel and / or the lower air guide channel has a preset offset angle with the radial direction of the airflow guide vane assembly. The offset angle is approximately 50°-70°.
[0020] The working principle and beneficial effects of this utility model are as follows:
[0021] When external airflow blows onto the entire new powder classifier rotor assembly, the portion of the airflow blowing towards the upper powder classifier rotor causes the finer particles in the initial powder to be blown towards the upper air inlet of the rotor body. These fine particles enter the rotor body through the upper air inlet and are discharged towards the upper air outlet under the influence of the airflow. After the initial powder has been sorted through the upper air inlet, the remaining initial powder is considered secondary powder. This secondary powder continues to fall to the outside of the lower powder classifier rotor. The external airflow then blows the remaining fine particles from this secondary powder towards the lower powder classifier rotor for secondary sorting. The fine powder after secondary sorting enters the lower powder classifier rotor through the lower air inlet and is finally discharged and collected through the lower air outlet. The secondary powder outside the lower powder classifier rotor continues to fall for further recycling. Due to the partition design... Between the upper and lower classifying rotors, when the airflow from outside the new classifying rotor assembly enters the upper and lower classifying rotors respectively, the airflow between them is separated by a partition, preventing them from converging. This allows the airflow in the upper classifying rotor to exit towards the upper outlet, and the airflow in the lower classifying rotor to exit towards the lower outlet. In other words, under the same airflow and air-to-solid ratio, by adjusting the height-to-diameter ratio, the residence time of the powder in the classifying zone of the classifier can be extended, thereby improving the powder sorting efficiency. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the main structure of a novel powder classifier rotor assembly disclosed in this embodiment;
[0024] Figure 2 This is a schematic diagram of the structure of an air classifier with a novel air classifier rotor assembly.
[0025] Figure 3 for Figure 1 A magnified view of a portion of point A in the middle;
[0026] Figure 4 for Figure 1 A magnified view of a portion of point B in the middle;
[0027] Figure 5 This is a schematic diagram of the airflow direction inside the upper powder separator rotor.
[0028] Figure label:
[0029] 1-New type of powder classifier rotor assembly, 10-Upper powder classifier rotor, 100-Upper air inlet, 101-Upper air outlet, 11-Lower powder classifier rotor, 110-Lower air inlet, 111-Lower air outlet, 12-Baffle plate;
[0030] 2-First discharge pipe;
[0031] 3-Second discharge pipe;
[0032] 4-Drive assembly, 40-Motor, 41-Rotor shaft, 42-Connecting frame;
[0033] 5-First feeding disc;
[0034] 6-Second spreading disc;
[0035] 7-Air classifier, 70-Airflow guide vane assembly, 71-Inlet, 72-Outlet;
[0036] P0 - Initial powder, P1 - Secondary powder, P2 - Fine powder, P3 - Coarse powder, A1 - Arrow, A2 - Arrow, A3 - Arrow. Detailed Implementation
[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0038] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this invention.
[0039] The embodiments of the utility model will now be described in detail with reference to the accompanying drawings.
[0040] Example
[0041] Please see Figure 1As shown, this embodiment discloses a novel powder classifier rotor assembly 1, which includes an upper powder classifier rotor 10, a lower powder classifier rotor 11, and a partition plate 12. The upper powder classifier rotor 10 has multiple upper air inlets 100 circumferentially formed on its side wall with its central axis as the rotation axis, and an upper air outlet 101 at its top. Similarly, the lower powder classifier rotor 11 has multiple lower air inlets 110 circumferentially formed on its side wall with its central axis as the rotation axis, and a lower air outlet 111 at its bottom.
[0042] Figure 2 The diagram shows the structure of the novel powder classifier rotor assembly 1 located inside the powder classifier 7. Specifically, the powder classifier 7 includes an airflow guide vane assembly 70, a first discharge pipe 2, a second discharge pipe 3, a feed inlet 71, a discharge outlet 72, and a drive assembly 4 for rotating the novel powder classifier rotor assembly. The novel powder classifier rotor assembly is located inside the airflow guide vane assembly 70, and there is a powder classifier channel between the novel powder classifier rotor assembly 1 and the airflow guide vane assembly 70 for the initial powder P0 and the secondary powder P1 to pass through. In terms of spatial orientation, the first discharge pipe 2 and the second discharge pipe 3 are located on both sides of the airflow guide vane assembly 70 (located on the upper and lower sides), respectively. The feed inlet 71 is used to put in the initial powder P0, and the discharge outlet 72 is used to discharge the secondary powder P1 that has undergone secondary classification.
[0043] The upper air outlet 101 of the upper powder classifier rotor 10 is connected to the first discharge pipe 2, and the lower air outlet 111 of the lower powder classifier rotor 11 is connected to the second discharge pipe 3. It is worth noting that in this embodiment, the initial powder P0 refers to the first batch of powder that has just entered the powder classifier 7, and the secondary powder P1 refers to the remaining powder after being classified by the upper air inlet 100 of the rotor body 11.
[0044] like Figure 2As shown, the drive assembly 4 includes a motor 40, a rotor shaft 41, and a connecting frame 42. Specifically, the motor 40 is a speed-regulating motor 40, which is mounted on the outer wall of the first discharge pipe 2. The rotor shaft 41 is mounted on the output end of the motor 40, and the other end of the rotor shaft 41 passes through the side wall of the first discharge pipe 2 and extends into the interior of the rotor body 1. The connecting frame 42 is mounted on the outer wall of the rotor shaft 41 to connect the rotor body 1 to the rotor shaft 41. When the connecting frame 42 does not extend through the partition 12 into the interior of the lower powder-selecting rotor 11, the connecting frame 42 is positioned between the outer wall of the rotor shaft 41 and the inner wall of the upper powder-selecting rotor 10, thereby enabling the motor 40 to drive the rotor shaft 41 to rotate, which in turn drives the rotor body 1 to rotate. When the connecting frame 42 passes through the partition plate 12 and extends into the interior of the lower powder classifier rotor 11, the connecting frame 42 provided on the outer wall of the rotor shaft 41 will connect simultaneously with the inner wall of the upper powder classifier rotor 10 and the inner wall of the lower powder classifier rotor 11, thereby improving the connection stability of the new powder classifier rotor assembly on the rotor shaft 41.
[0045] Specifically, such as Figure 1-5 As shown, when the initial powder P0 enters through the feed inlet 71 of the classifier 7, during its descent, as the initial powder P0 passes the upper air inlet 100 of the upper classifier rotor 10, the initial powder P0 will be separated by the classifier airflow (such as...) within the classifier. Figure 1 Guided by the direction of arrow A2, the finer particles P2 in the initial powder P0 are blown to the first air inlet 100 of the upper powder separator rotor 10. This finer powder P2 then enters the interior of the upper powder separator rotor 10 through the first air inlet 100, and then flows into the connected first discharge pipe 2 for collection. It is worth noting that the powder separator airflow (such as...) Figure 5 The direction of arrow A2 in the middle) when entering the interior of the upper powder-selecting rotor 10, the powder-selecting airflow (such as...) Figure 5 The direction of the arrow in A2 will create a rotating airflow (such as...). Figure 5 (The direction of arrow A3 in the middle), and because the partition 12 separates the upper powder-selecting rotor 10 and the lower powder-selecting rotor 11, the airflow between the upper powder-selecting rotor 10 and the lower powder-selecting rotor 11 will not be mixed, thus allowing the rotating airflow inside the upper powder-selecting rotor 10 (such as...) Figure 5 The airflow direction (as indicated by arrow A3) is towards the first discharge pipe 2, and finally exits from inside the first discharge pipe 2 and is discharged. For the initial powder P0 after the first classification, it will fall to the lower air inlet 110 located on the lower classifying rotor 11 under the influence of gravity. At this point, the powder is secondary powder P1. Secondary powder P1 continues to be subjected to the classifying airflow (such as...) inside the classifier. Figure 1Guided by the direction of arrow A2, the remaining fine powder P2 with smaller particle size in the secondary powder P1 is blown towards the second air inlet 110, allowing this fine powder P2 to enter the lower powder separator rotor 11 through the second air inlet 110, and finally be discharged and collected through the connected second discharge pipe 3. Similarly, the powder separator airflow (such as...) Figure 5 The direction of arrow A2 in the middle) will create a rotating airflow when it enters the interior of the lower powder separator rotor 11 (such as...). Figure 5 (As indicated by arrow A3 in the diagram), due to the presence of baffle 12, the central airflow direction of this rotating airflow is towards the second discharge pipe 3, which can blow the fine powder P2 entering the lower classifying rotor 11 into the second discharge pipe 3 for discharge. Larger particles outside the lower classifying rotor 11 will continue to fall until they are discharged and collected from the discharge port 71 of the classifier 7. That is, under the same air volume and air-to-solid ratio adjustment, by adjusting the height-to-diameter ratio of the new classifying rotor assembly, secondary powder classification is performed, improving the powder classification efficiency. In this embodiment, baffle 12 is selected as a blind plate or a perforated plate.
[0046] As can be seen from the above, such as Figure 2 As shown, the upper powder-selecting rotor 10 has an upper air outlet 101 at one end near the first discharge pipe 2. The inner diameter of the upper air outlet 101 can be smaller than or equal to the inner diameter of the first discharge pipe 2. The lower powder-selecting rotor 11 has a lower air outlet 111 at one end near the second discharge pipe 3. The inner diameter of the lower air outlet 111 can be smaller than or equal to the inner diameter of the second discharge pipe 3. The upper air outlet 101 can better collect and transport the fine powder P2 in the upper powder-selecting rotor 10 into the first discharge pipe 2, preventing the fine powder P2 in the first feeding area from leaking out from the gap between the upper powder-selecting rotor 10 and the first discharge pipe 2. The lower air outlet 111 can better collect and transport the fine powder P2 in the lower powder-selecting rotor 11 into the second discharge pipe 3, preventing the fine powder P2 in the second feeding area from leaking out from the gap between the lower powder-selecting rotor 11 and the second discharge pipe 3.
[0047] like Figure 1-2As shown, a primary feeding disc 5 and a secondary feeding disc 6 are respectively provided on the outside of the rotor body 1 for collecting and distributing the initial powder P0 and the secondary powder P1. Specifically, the primary feeding disc 5 is located on the outer top of the upper powder-selecting rotor 10 and can collect and distribute the initial powder P0. The secondary feeding disc 6 is located on the outer top of the partition plate 12 and can collect and distribute the secondary powder P1. In this embodiment, both the primary feeding disc 5 and the secondary feeding disc 6 are feeding discs with an L-shaped cross-section. The longer wall of the primary feeding disc 5 is used to collect the initial powder P0, and under the drive of the drive component 4, the collected initial powder P0 can be thrown out of the primary feeding disc 5 in a throwing manner. Similarly, the longer wall of the secondary feeding disc 6 is used to collect the secondary powder P1, and the secondary powder P1 collected on the top of the secondary feeding disc 6 is also thrown out of the secondary feeding disc 6 in a throwing manner under the drive of the drive component. When the initial powder P0 enters the powder selection channel, the primary feeding disc 5 collects the initial powder P0, causing its falling speed to zero. After a brief pause on the primary feeding disc 5, the initial powder P0 is thrown out by the upper powder selection rotor 10, which is driven by the drive component 4. After the initial powder P0 undergoes the first powder selection, the secondary powder P1 falls onto the secondary feeding disc 6. The secondary feeding disc 6 collects the secondary powder P1 and reduces its falling speed to zero, extending the time the secondary powder P1 spends in the powder selection channel. The secondary powder P1 on the secondary feeding disc 6 is then thrown out by the drive component, allowing it to undergo a second powder selection.
[0048] It should be noted that, in this embodiment, the aforementioned airflow guide vane assembly 70 is not described in detail. The airflow guide vane assembly 70 is a well-known and mature structural component in the technical field, typically having an upper airflow channel and a lower airflow channel. Furthermore, the airflow direction formed by the upper airflow channel and / or the lower airflow channel forms a preset offset angle with the radial direction of the airflow guide vane assembly. The offset angle is approximately 50°-70°. The purpose of this setting is to guide the airflow entering the classifier 7 into a rotating airflow, thereby meeting the classifying requirements of the classifier 7.
[0049] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A novel powder classifier rotor assembly, characterized in that, include: The upper powder-selecting rotor has multiple upper air inlets circumferentially opened on its side wall with its own central axis as the rotation axis; the top of the upper powder-selecting rotor has an upper air outlet; The lower powder classifier rotor has multiple lower air inlets circumferentially opened on its side wall with its own central axis as the rotation axis; the bottom of the lower powder classifier rotor has a lower air outlet; A partition is disposed between the upper classifying rotor and the lower classifying rotor to block the internal gas flow between the upper classifying rotor and the lower classifying rotor; in, The axial projection area of the partition plate at least covers the axial projection area of the upper powder classifier rotor and / or the lower powder classifier rotor.
2. The novel air classifier rotor assembly according to claim 1, characterized in that, The partition is a blind plate or a perforated plate.
3. The novel powder classifier rotor assembly according to claim 1, characterized in that, The top of the outer edge of the upper powder separator rotor is provided with a primary material spreading disc, which is used to collect the initial powder and throw the initial powder in a throwing motion away from the central axis of the upper powder separator rotor.
4. The novel air classifier rotor assembly according to claim 2, characterized in that, The outer edge of the partition is provided with a secondary feeding disc, which is used to collect the secondary powder falling from the primary feeding disc and to throw the secondary powder away from the central axis of the lower powder separator rotor in a throwing motion.
5. A classifier, characterized in that, include: The novel powder classifier rotor assembly as described in any one of claims 1-4; and First discharge pipe and second discharge pipe; The upper air outlet of the upper powder-selecting rotor is connected to the first discharge pipe, and the lower air outlet of the lower powder-selecting rotor is connected to the second discharge pipe.
6. The air classifier according to claim 5, characterized in that, Also includes: A driving component, the driving component specifically including: The motor has a rotor shaft at its output end, and the other end of the rotor shaft passes through the wall of the first discharge pipe and extends into the interior of the upper powder-selecting rotor, or the other end of the rotor shaft passes through the wall of the first discharge pipe and the partition and extends into the interior of the lower powder-selecting rotor. The outer wall of the rotor shaft is provided with a connecting frame that connects to the upper classifying rotor and / or the lower classifying rotor.
7. The air classifier according to claim 6, characterized in that, The upper powder classifier rotor, the lower powder classifier rotor, and the rotor shaft are coaxially arranged.
8. The air classifier according to claim 5, characterized in that, Also includes: An airflow guide vane assembly disposed around the periphery of the novel powder classifier rotor assembly; The airflow guide vane assembly has an upper airflow channel and a lower airflow channel; The airflow direction formed by the upper airflow channel and / or the lower airflow channel forms a preset offset angle with the radial direction of the airflow guide vane assembly.