Low-resistance powder concentrator
By introducing low-resistance blade assemblies and rotor assemblies into the vertical mill classifier, the rotor transforms exhaust air into suction air. Combined with screening and vibration components, the problem of high system resistance is solved, the classification efficiency and rotor life are improved, and energy consumption is reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-03-17
AI Technical Summary
The existing vertical mill classifier has high system resistance during operation, resulting in high powder concentration and affecting the powder classification efficiency.
The design employs low-resistance blade and rotor assemblies, transforming exhaust into suction via the rotor to reduce system pressure differential and resistance. Screening efficiency is improved through screening and vibration assemblies, while stability is enhanced by the shell support structure.
It reduces rotor pressure loss and system pressure in the air classifier, improves air classification efficiency, extends rotor service life, and reduces energy waste and dust concentration.
Smart Images
Figure CN223996635U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of vertical mill classifiers, specifically a low-resistivity classifier. Background Technology
[0002] The vertical mill classifier is a key component of a large vertical mill, mainly used for grinding and classifying powders. It consists of a grinding disc, a fan, a conveying device, and a control system.
[0003] The working principle of the vertical mill classifier is as follows: the motor drives the grinding disc to rotate, and the crushing roller works with the grinding disc to crush the powder. Through the classification effect of the classifier, materials of different particle sizes are separated. The powder is then carried to the target position by the fan to complete the screening function.
[0004] In existing air classifier technology, vertical mill air classifiers have relatively high system resistance during operation, resulting in high air classifier concentration and affecting air classifier efficiency.
[0005] Therefore, this utility model provides a low-resistivity air classifier. Utility Model Content
[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.
[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A low-resistivity classifier of this utility model includes a housing; a feed pipe is fixedly connected to the side wall of the housing; a powder outlet is provided at the top of the housing; a grinding disc module is installed inside the housing; a low-resistivity moving blade assembly is installed at the top of the inner side wall of the housing; a rotor assembly is provided at the top of the inner side wall of the housing; a screening assembly is provided at the bottom of the feed pipe; a vibration assembly is provided near the bottom of the screening assembly on the feed pipe; a guide pipe is fixedly connected to the housing through the low-resistivity moving blade assembly; an air inlet is opened on the side wall of the housing near the grinding disc module. This step, through the arrangement of the housing, feed pipe, powder outlet, grinding disc module, guide pipe, air inlet, low-resistivity moving blade assembly, and rotor assembly, forms a low-resistivity classifier structure, realizing the transformation of the rotor from exhaust to suction, solving the problem of large pressure difference in the classifier, reducing rotor pressure loss and system pressure, reducing system resistance, and improving the efficiency of powder selection.
[0008] Preferably, the low-resistance moving blade assembly includes a pair of fixed rings, a fixed plate, and stationary blades; the fixed plate is fixedly connected to the inner sidewall of the pair of fixed rings; multiple sets of fixed plates are arranged on the inner sidewall of the pair of fixed rings and are evenly distributed on the inner sidewall of the fixed plate; the fixed rings are fixedly connected to the top of the inner sidewall of the housing; the stationary blades are fixedly connected to the sidewall of the fixed plate; a pair of stationary blades are arranged on the sidewall of the fixed plate; this step, through the arrangement of fixed rings, fixed plates, and stationary blades, forms a low-resistance selective moving blade structure, so that the circumferential linear velocity of the rotor is the same as the velocity of the gas ejected from the guide vanes, reducing the erosion and wear of the material and the rotor blades, and improving the service life of the rotor.
[0009] Preferably, the rotor assembly includes a rotor body, a cone, and a connecting rod; the rotor body is rotatably connected to the top of the inner wall of the housing; the cone is fixedly connected to the bottom of the rotor body; the connecting rod is fixedly connected between the rotor body and the cone; multiple sets of connecting rods are arranged between the rotor body and the cone; this step, through the arrangement of the rotor body, the cone, and the connecting rod, forms a rotor structure, realizing the function of the rotor changing from exhaust to suction, reducing the pressure difference of the air classifier, reducing the pressure loss of the air classifier rotor, reducing system pressure, and reducing energy waste.
[0010] Preferably, the screening assembly includes a screen plate and a powder trough; the screen plate is installed at the bottom of the feed pipe; the powder trough is fixedly connected to the bottom of the feed pipe near the screen plate; this step, through the setting of the screen plate and the powder trough, forms a pre-screening structure, realizing the function of screening materials, solving the problem of small particles entering the shell for grinding, reducing the dust concentration inside the shell, and improving the efficiency of the powder classifier.
[0011] Preferably, the vibration assembly includes a servo motor, a rotating shaft, a cam, and an elastic plate; the servo motor is fixedly connected to the side wall of the lower powder trough; the rotating shaft is rotatably connected inside the lower powder trough; the transmission end of the servo motor is fixedly connected to the end of the rotating shaft; the cam is fixedly connected to the middle of the rotating shaft; the elastic plate is fixedly connected to the outer wall of the screen plate; the outer wall of the elastic plate is fixedly connected to the bottom of the feed pipe; this step, through the arrangement of the servo motor, rotating shaft, cam, and elastic plate, forms a vibrating screening structure, realizing the function of driving the screen plate to vibrate, solving the problem of material accumulation at the top of the screen plate causing blockage, and improving the screening efficiency of the screen plate.
[0012] Preferably, a base is fixedly connected to the bottom of the housing; multiple sets of bases are provided at the bottom of the housing; this step, by setting the bases, forms a support structure, realizes the function of supporting and fixing the housing, solves the problem of shaking when the housing is working, and reduces the abnormal wear of the device caused by shaking.
[0013] Preferably, the rotor body surface is nitrided; nitriding the rotor body surface increases the hardness of the rotor body surface, improves the service life of the rotor body, and reduces the situation of excessive wear of the rotor body.
[0014] The beneficial effects of this utility model are as follows:
[0015] 1. The low-resistivity classifier of this utility model, through the arrangement of the shell, feed pipe, powder outlet, grinding disc module, guide pipe, air inlet, low-resistivity moving blade assembly and rotor assembly, forms a low-resistivity classifier structure, realizes the rotor to change exhaust air to suction air, solves the problem of large pressure difference in the classifier, reduces rotor pressure loss and system pressure, reduces system resistance, and improves the efficiency of powder classification.
[0016] 2. The low-resistivity classifier of this utility model, through the arrangement of a fixed ring, a fixed plate and stationary blades, forms a low-resistivity classifier moving blade structure, so that the circumferential linear velocity of the rotor is the same as the velocity of the gas ejected from the guide vane, thereby reducing the erosion and wear between the material and the rotor blades and improving the service life of the rotor. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings.
[0018] Figure 1 This is a perspective view of the present invention;
[0019] Figure 2 This is a schematic diagram of the structure of the material guide tube and the shell in this utility model;
[0020] Figure 3 This is a schematic diagram of the structure of the stationary blade and the rotor body in this utility model;
[0021] Figure 4 This is a schematic diagram of the structure of the cam and the sieve plate in this utility model.
[0022] In the diagram: 1. Shell; 11. Feed pipe; 12. Powder outlet; 13. Grinding disc module; 14. Guide pipe; 15. Air inlet; 2. Fixing ring; 21. Fixing plate; 22. Stationary blade; 3. Rotor body; 31. Cone; 32. Connecting rod; 4. Sieve plate; 41. Lower powder trough; 5. Servo motor; 51. Rotating shaft; 52. Cam; 53. Elastic plate; 6. Base. Detailed Implementation
[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0024] like Figures 1 to 4As shown, a low-resistivity classifier according to an embodiment of the present invention includes a housing 1; a feed pipe 11 is fixedly connected to the side wall of the housing 1; a powder outlet 12 is provided at the top of the housing 1; a grinding disc module 13 is installed inside the housing 1; a low-resistivity moving blade assembly is installed at the top of the inner side wall of the housing 1; a rotor assembly is provided at the top of the inner side wall of the housing 1; a screening assembly is provided at the bottom of the feed pipe 11; a vibration assembly is provided near the bottom of the screening assembly on the feed pipe 11; a guide pipe 14 is fixedly connected to the housing 1 through the low-resistivity moving blade assembly; an air inlet 15 is opened on the side wall of the housing 1 near the grinding disc module 13; during operation, the material is fed into the grinding disc module 13 inside the housing 1 through the feed pipe 11, the grinding disc module 13 grinds the material, and the rotor assembly is driven by a drive motor to rotate, thus grinding the material into the housing 1. 1. Air from outside the rotor assembly is drawn into the rotor and discharged through the powder outlet 12. Air enters the housing 1 from the air inlet 15. The fine powder ground is swept up by the hot air, passes through the low-resistance blade assembly into the rotor assembly, and is discharged from the powder outlet 12, completing the powder selection operation. Larger fine powder particles fall into the feed pipe 14 under the action of gravity and fall back onto the grinding disc module 13 for grinding. This step, through the arrangement of the housing 1, feed pipe 11, powder outlet 12, grinding disc module 13, feed pipe 14, air inlet 15, low-resistance blade assembly and rotor assembly, forms a low-resistance powder selection structure, realizing the rotor to change from exhaust to suction, solving the problem of large pressure difference in the powder classifier, reducing rotor pressure loss and system pressure, reducing system resistance, and improving powder selection efficiency.
[0025] like Figure 2 and Figure 3 As shown, the low-resistance moving blade assembly includes a pair of fixed rings 2, a fixed plate 21, and stationary blades 22. The fixed plate 21 is fixedly connected to the inner wall of the pair of fixed rings 2. Multiple sets of fixed plates 21 are arranged on the inner wall of the pair of fixed rings 2, and are evenly distributed on the inner wall of the fixed plate 21. The fixed rings 2 are fixedly connected to the top of the inner wall of the housing 1. The stationary blades 22 are fixedly connected to the side wall of the fixed plate 21. A pair of stationary blades 22 are arranged on the side wall of the fixed plate 21. During operation, when the rotor assembly rotates, it draws in air from the outside. The air carries fine powder from the outer wall of the fixed rings 2 into the interior of the fixed rings 2. The stationary blades 22 are arranged in the direction of rotation of the rotor assembly, so that the circumferential linear velocity of the rotor edge is the same as the velocity of the gas ejected by the guide vane. This step, through the arrangement of the fixed rings 2, fixed plate 21, and stationary blades 22, forms a low-resistance powder-selecting moving blade structure, so that the circumferential linear velocity of the rotor is the same as the velocity of the gas ejected by the guide vane, reducing the erosion and wear between the material and the rotor blades, and improving the service life of the rotor.
[0026] like Figure 3As shown, the rotor assembly includes a rotor body 3, a cone 31, and a connecting rod 32. The rotor body 3 is rotatably connected to the top of the inner wall of the housing 1. The cone 31 is fixedly connected to the bottom of the rotor body 3. The connecting rod 32 is fixedly connected between the rotor body 3 and the cone 31. Multiple sets of connecting rods 32 are arranged between the rotor body 3 and the cone 31. During operation, the drive motor drives the rotor body 3 to rotate, and the rotor body 3 drives the cone 31 and the connecting rod 32 to rotate. The rotor body 3 draws air from the outside into its interior and draws fine powder into its interior, which is then discharged through the powder outlet 12. Larger fine powder particles fall onto the cone 31 and into the bottom of the housing 1. The connecting rod 32 serves as a connector. This step, through the arrangement of the rotor body 3, the cone 31, and the connecting rod 32, forms a rotor structure, realizing the function of the rotor changing from exhaust to suction, reducing the pressure difference of the classifier, reducing the pressure loss of the classifier rotor, reducing system pressure, and reducing energy waste.
[0027] like Figure 4 As shown, the screening assembly includes a screen plate 4 and a powder trough 41. The screen plate 4 is installed at the bottom of the feed pipe 11. The powder trough 41 is fixedly connected to the bottom of the feed pipe 11 near the screen plate 4. During operation, when the material is fed into the housing 1 through the feed pipe 11, the material moves on the screen plate 4. Small particles fall into the powder trough 41 through the screen plate 4. The powder trough 41 is then connected to other collection devices to perform pre-screening of the material. This step, through the setting of the screen plate 4 and the powder trough 41, forms a pre-screening structure, realizing the function of screening the material, solving the problem of small particles entering the housing 1 for grinding, reducing the dust concentration inside the housing 1, and improving the efficiency of the powder classifier.
[0028] like Figure 4 As shown, the vibration assembly includes a servo motor 5, a rotating shaft 51, a cam 52, and an elastic plate 53. The servo motor 5 is fixedly connected to the side wall of the lower powder trough 41. The rotating shaft 51 is rotatably connected inside the lower powder trough 41. The transmission end of the servo motor 5 is fixedly connected to the end of the rotating shaft 51. The cam 52 is fixedly connected to the middle of the rotating shaft 51. The elastic plate 53 is fixedly connected to the outer wall of the screen plate 4. The outer wall of the elastic plate 53 is fixedly connected to the bottom of the feed pipe 11. During operation, when the screen plate 4 screens materials, the servo motor 5 is started. The servo motor 5 drives the rotating shaft 51 and the cam 52 to rotate. The cam 52 repeatedly lifts the screen plate 4, and the elastic plate 53 drives the screen plate 4 to reset in time, causing the screen plate 4 to vibrate and screen out the fine powder in the material. This step, through the arrangement of the servo motor 5, the rotating shaft 51, the cam 52, and the elastic plate 53, forms a vibrating screening structure, realizing the function of driving the screen plate 4 to vibrate, solving the problem of material accumulation on the top of the screen plate 4 causing blockage, and improving the screening efficiency of the screen plate 4.
[0029] like Figure 1As shown, a base 6 is fixedly connected to the bottom of the housing 1; multiple sets of base 6 are set at the bottom of the housing 1; during operation, the base 6 supports and fixes the housing 1, increasing the stability of the housing 1 when it is placed during operation; this step, through the setting of the base 6, forms a support structure, realizes the function of supporting and fixing the housing 1, solves the problem of shaking when the housing 1 is working, and reduces the abnormal wear of the device caused by shaking.
[0030] like Figure 3 As shown, the surface of the rotor body 3 is nitrided. During operation, the surface of the rotor body 3 is nitrided to increase the hardness of the rotor body 3, improve the service life of the rotor body 3, and reduce the situation of excessive wear of the rotor body 3.
[0031] During operation, materials are fed into the grinding disc module 13 inside the housing 1 through the feed pipe 11. The grinding disc module 13 grinds the materials. The drive motor drives the rotor assembly to rotate, drawing air from outside the rotor assembly into the rotor and discharging it through the powder outlet 12. Air enters the housing 1 from the air inlet 15. The fine powder is swept up by the hot air, passes through the low-resistance blade assembly into the rotor assembly, and then exits from the powder outlet 12, completing the powder selection operation. Larger fine powder particles fall into the guide pipe 14 under gravity and fall back onto the grinding disc module 13 for grinding. When the rotor assembly rotates, it draws in air from the outside. The air carries the fine powder from the outer wall of the fixed ring 2 into the fixed ring 2. The stationary blades 22 are set in the direction of rotor assembly rotation so that the circumferential linear velocity of the rotor edge is the same as the velocity of the gas ejected by the guide blades. The drive motor drives the rotor body 3 to rotate, and the rotor body 3 drives the cone 31 and connecting rod 32 to rotate. The rotor body 3 draws in air from the outside of the rotor assembly into the rotor assembly. Air is drawn into the rotor body 3, and fine powder is drawn into the rotor body 3 and discharged through the powder outlet 12. Larger fine powder particles fall onto the cone 31 and into the bottom of the housing 1. The connecting rod 32 serves as a connection. When the material is fed into the housing 1 through the feed pipe 11, the material moves on the sieve plate 4. Smaller powder particles fall into the lower powder trough 41 through the sieve plate 4. The lower powder trough 41 is then connected to other collection devices for pre-screening of the material. When the sieve plate 4 screens the material, the servo motor 5 is started. The servo motor 5 drives the rotating shaft 51 and the cam 52 to rotate. The cam 52 repeatedly lifts the sieve plate 4, and the elastic plate 53 drives the sieve plate 4 to reset in time, causing the sieve plate 4 to vibrate and screen out the fine powder in the material. The base 6 supports and fixes the housing 1, increasing the stability of the housing 1 when it is placed during operation. The surface of the rotor body 3 is nitrided to increase the surface hardness of the rotor body 3, improve the service life of the rotor body 3, and reduce the situation of excessive wear of the rotor body 3.
[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A low resistance powder concentrator comprising a housing (1); characterized in that: The shell (1) side wall is fixedly connected with a feeding pipe (11); the shell (1) top is provided with a powder outlet (12); the shell (1) inside is provided with a grinding disc module (13); the shell (1) inner side wall top is provided with a low-resistance moving vane assembly; the shell (1) inner side wall top is provided with a rotor assembly; the feeding pipe (11) bottom is provided with a screening assembly; the feeding pipe (11) is provided with a vibration assembly near the screening assembly bottom; the shell (1) is fixedly connected with a guide pipe (14) through the low-resistance moving vane assembly; the shell (1) is provided with an air inlet (15) near the grinding disc module (13) side wall.
2. A low resistance powder concentrator according to claim 1, characterized in that: The low-resistance moving vane assembly comprises a pair of fixed rings (2), a fixed plate (21) and a stationary vane (22); the fixed plate (21) is fixedly connected to the inner side wall of the pair of fixed rings (2); the fixed plate (21) is provided with multiple groups on the inner side wall of the pair of fixed rings (2) and is evenly distributed on the inner side wall of the fixed plate (21); the fixed ring (2) is fixedly connected to the inner side wall top of the shell (1); the stationary vane (22) is fixedly connected to the side wall of the fixed plate (21); the stationary vane (22) is provided with a pair on the side wall of the fixed plate (21).
3. A low resistance powder concentrator as claimed in claim 1, wherein: The rotor assembly comprises a rotor body (3), a cone (31) and a connecting rod (32); the rotor body (3) is rotatably connected to the inner side wall top of the shell (1); the cone (31) is fixedly connected to the bottom of the rotor body (3); the connecting rod (32) is fixedly connected between the rotor body (3) and the cone (31); the connecting rod (32) is provided with multiple groups between the rotor body (3) and the cone (31).
4. A low resistance powder concentrator according to claim 1, characterized in that: The screening assembly comprises a sieve plate (4) and a lower powder tank (41); the sieve plate (4) is installed at the bottom of the feeding pipe (11); the lower powder tank (41) is fixedly connected to the bottom of the feeding pipe (11) near the sieve plate (4).
5. A low resistance powder concentrator according to claim 4, wherein: The vibration assembly comprises a servo motor (5), a rotating shaft (51), a cam (52) and an elastic plate (53); the servo motor (5) is fixedly connected to the side wall of the lower powder tank (41); the rotating shaft (51) is rotatably connected inside the lower powder tank (41); the transmission end of the servo motor (5) is fixedly connected to the end of the rotating shaft (51); the cam (52) is fixedly connected to the middle of the rotating shaft (51); the elastic plate (53) is fixedly connected to the outer side wall of the sieve plate (4); the outer side wall of the elastic plate (53) is fixedly connected to the bottom of the feeding pipe (11).
6. A low resistance powder concentrator according to claim 1, characterized in that: The shell (1) bottom is fixedly connected with a base (6); the base (6) is provided with multiple groups at the bottom of the shell (1).
7. A low resistance powder concentrator as claimed in claim 3, wherein: The surface of the rotor body (3) is subjected to nitriding treatment.