A dust collector for a powder plant

Abstract

The utility model relates to a kind of dust collector of powder workshop, comprising: cyclone dust collector and energy recovery assembly;The energy recovery assembly is set at the exhaust port of the cyclone dust collector, to recover energy, the energy recovery assembly includes connecting shell, the inside of the connecting shell is provided with stator winding and permanent magnet rotor, the permanent magnet rotor includes impeller cylinder, the impeller cylinder is set on the air path of the cyclone dust collector discharge airflow, the stator winding is set on the outside of the permanent magnet rotor.This utility model sets stator winding and permanent magnet rotor and other components, through the cooperation between stator winding and permanent magnet rotor, so that the energy recovery assembly is set at the exhaust port of cyclone dust collector, when cyclone dust collector works, the airflow discharged pushes permanent magnet rotor rotation, thereby recovering energy by power generation.

Description

Technical Field

[0001] This utility model relates to the field of workshop dust removal technology, specifically to a dust collector for a powder workshop. Background Technology

[0002] Dust-generating workshops refer to industrial workplaces where a large amount of suspended dust particles are generated or present during the production process. They are widely found in many industries such as mining, metallurgy, building materials, machining, chemical industry, and food processing. These dust particles mainly originate from processes such as crushing, grinding, cutting, screening, conveying, and mixing of materials.

[0003] To avoid the negative impact of suspended dust particles, dust-laden workshops typically use negative pressure to draw dust particles from the workshop into dust collectors. Common dust collectors include cyclone dust collectors, bag dust collectors, and electrostatic precipitators. Cyclone dust collectors use centrifugal force to separate dust. Dust-laden gas enters along the tangential direction of the dust collector cylinder and rotates at high speed inside the cylinder. Due to their large mass, the dust particles are thrown against the cylinder wall and fall down the wall into the dust hopper. Clean gas is discharged from the central exhaust pipe. Because cyclone dust collectors require high airflow velocity, low velocity leads to insufficient centrifugal force, resulting in dust separation failure and the inability to achieve the desired dust separation effect. High-velocity airflow is directly discharged after dust separation, causing a certain degree of resource waste. Therefore, a dust collector for powder workshops is proposed to solve the above-mentioned problems. Utility Model Content

[0004] Based on the above description, this utility model provides a dust collector for a powder workshop to solve the problem of resource waste caused by the direct discharge of airflow from cyclone dust collectors.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a dust collector for a powder workshop, comprising: a cyclone dust collector and an energy recovery component; The energy recovery component is located at the exhaust port of the cyclone dust collector to recover energy. The energy recovery component includes a connecting housing, inside which a stator winding and a permanent magnet rotor are arranged. The permanent magnet rotor includes an impeller cylinder, which is arranged in the air path of the cyclone dust collector's exhaust airflow. The stator winding is sleeved on the outside of the permanent magnet rotor.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the connecting housing includes two hollow half-shells, and the sides of the two hollow half-shells are provided with mounting ears. Adjacent mounting ears are connected to each other by screws and nuts to connect the two hollow half-shells.

[0008] Furthermore, the hollow semi-shell is provided with a semi-cylinder at both the upper and lower ends, and a semi-flange is provided on the outer surface of the semi-cylinder. Two adjacent semi-cylinders form a cylinder, which is interconnected with the interior of the hollow semi-shell. Two adjacent semi-flanges form a flange. A limit groove is provided on the side wall inside the hollow semi-shell. An installation groove is provided on the opposite side of the upper and lower cylinders. A rotary sealing ring is provided inside the installation groove.

[0009] Furthermore, the impeller cylinder includes two cylinders, which are symmetrically distributed vertically and connected to each other by screws to form a hollow cylinder. The outer surface of the hollow cylinder is tightly fitted with the inner wall of the rotating sealing ring, and multiple blades are arranged inside the hollow cylinder. The multiple blades are inclined at a preset angle to convert the kinetic energy of the upward airflow into the kinetic energy of the hollow cylinder's rotation.

[0010] Furthermore, an annular force-bearing block is sleeved on the outside of the cylinder, and a first inclined surface is provided on the opposite side of the upper and lower two annular force-bearing blocks. A first annular groove is provided on the opposite side of the upper and lower two first inclined surfaces, and a ball is provided inside the first annular groove.

[0011] Furthermore, the outer surface of the hollow cylinder is provided with multiple permanent magnet slots, which are distributed in an even number in a ring. The permanent magnet slots are located between the upper and lower annular force-bearing blocks, and the upper and lower side walls of the slots are provided with locking grooves.

[0012] Furthermore, a permanent magnet is provided inside the permanent magnet slot. The permanent magnet includes a magnet block, and both the upper and lower ends of the magnet block are provided with locking blocks. The magnet block is located inside the permanent magnet slot, and the locking blocks extend into the slot.

[0013] Furthermore, the stator winding includes a stator assembly disposed inside the hollow semi-shell. The stator assembly includes a fixed cylinder, and a winding rod is disposed on the outer surface of the fixed cylinder. The winding rod extends into the interior of the limiting groove, which is used to limit the winding rod. A three-phase winding is wound around the outside of the winding rod.

[0014] Furthermore, the fixed cylinder is provided with an annular inner block, which is located between the upper and lower annular force-bearing blocks. The upper and lower surfaces of the annular inner block are provided with a second inclined surface. The inclination direction and angle of the second inclined surface are consistent with the first inclined surface. A second annular groove is provided on the surface of the second inclined surface facing the first inclined surface. The ball is disposed between the first annular groove and the second annular groove, and extends into the interior of both the first annular groove and the second annular groove.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. This utility model sets up components such as stator windings and permanent magnet rotors. Through the cooperation between the stator windings and permanent magnet rotors, the energy recovery component is set at the exhaust port of the cyclone dust collector. When the cyclone dust collector is working, the exhaust airflow drives the permanent magnet rotor to rotate, thereby recovering energy by generating electricity. 2. By setting up the impeller cylinder, stator assembly, and ball bearings, the impeller cylinder is positioned and its rotation is assisted. The ball bearings support and position the impeller cylinder on the one hand, and convert sliding friction into rolling friction on the other hand, reducing the friction force when the impeller cylinder rotates. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of a dust collector in a powder workshop provided for an embodiment of this utility model; Figure 2 This is a schematic diagram of the energy recovery component in an embodiment of the present invention; Figure 3 for Figure 2 Another structural diagram from another perspective; Figure 4 This is a schematic diagram of the structure connecting the outer shell in an embodiment of this utility model; Figure 5 This is a schematic diagram of the impeller cylinder in an embodiment of the present utility model; Figure 6 for Figure 5 Another structural diagram from another perspective; Figure 7 This is a schematic diagram of the stator assembly in an embodiment of the present invention; Figure 8 for Figure 7 Another structural diagram from another perspective; Figure 9 This is a schematic diagram of the permanent magnet structure in an embodiment of this utility model; The attached diagram lists the components represented by each number as follows: 1. Cyclone dust collector; 2. Connecting shell; 21. Hollow half-shell; 22. Half-cylinder; 23. Half-flange; 24. Limiting groove; 25. Mounting groove; 26. Mounting ear; 3. Impeller cylinder; 31. Cylinder; 32. Annular force-bearing block; 33. First inclined surface; 34. First annular groove; 35. Permanent magnet slot; 36. Snap-fit ​​groove; 37. Blade; 4. Stator assembly; 41. Fixed cylinder; 42. Annular inner block; 43. Second inclined surface; 44. Second annular groove; 45. Winding rod; 46. Three-phase winding; 5. Permanent magnet; 51. Magnet block; 52. Locking block; 6. Ball bearing; 7. Rotary sealing ring. Detailed Implementation

[0017] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0019] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0020] Please see Figure 1 A dust collector for a powder workshop, comprising: a cyclone dust collector 1 and an energy recovery component; The energy recovery component is located at the exhaust port of the cyclone dust collector 1 to recover energy. The energy recovery component includes a connecting housing 2, inside which a stator winding and a permanent magnet rotor are arranged. The permanent magnet rotor includes an impeller cylinder 3, which is arranged in the air path of the exhaust airflow of the cyclone dust collector 1. The stator winding is sleeved on the outside of the permanent magnet rotor. Based on the above, when the energy recovery device is installed at the exhaust port of the cyclone dust collector 1, the high-velocity airflow is discharged from the exhaust port. The discharged airflow drives the permanent magnet rotor to rotate, thereby converting the kinetic energy of the airflow into the kinetic energy of the permanent magnet rotor. Furthermore, the permanent magnet rotor and the stator winding cooperate with each other to convert the kinetic energy of the permanent magnet rotor into electrical energy. The electrical energy is connected to the battery through a dedicated charging circuit. Since the storage of electrical energy after power generation is not a core technical feature of this technical solution, and the dedicated charging circuit is a common and mature technology in the field of generators, it is not described in detail here.

[0021] like Figures 2-4As shown, the connecting housing 2 includes two hollow half-shells 21. The two hollow half-shells 21 are provided with mounting ears 26 on their sides. Two adjacent mounting ears 26 are connected to each other by screws and nuts to connect the two hollow half-shells 21. The hollow semi-shell 21 has a semi-cylindrical body 22 at both the upper and lower ends. The outer surface of the semi-cylindrical body 22 is provided with a semi-flange 23. Two adjacent semi-cylindrical bodies 22 form a cylinder, which is interconnected with the interior of the hollow semi-shell 21. Two adjacent semi-flanges 23 form a flange. The inner side wall of the hollow semi-shell 21 is provided with a limiting groove 24. The upper and lower cylinders are provided with mounting grooves 25 on opposite sides. The mounting grooves 25 are provided with a rotary sealing ring 7, preferably made of fluororubber (FKM) material, which has the characteristics of temperature resistance (-20℃-200℃), wear resistance, dust erosion resistance, and low coefficient of friction. Based on the above, the two hollow half-shells 21 are connected by mounting ears 26, which makes it easy to install the stator assembly 4 and impeller cylinder 3 inside the connecting shell 2. The setting of the cylinder and flange allows the connecting shell 2 to communicate with the exhaust port of the cyclone dust collector 1. After communication, the airflow discharged from the exhaust port can enter the interior of the connecting shell 2. The mounting groove 25 serves to limit the position of the stator assembly 4, ensuring that the stator assembly 4 is fixed and will not rotate. The rotating sealing ring 7 provides a seal, ensuring that the outer surface of the impeller cylinder 3 remains sealed to the connecting housing 2 during rotation, thus preventing dust from entering.

[0022] like Figure 2 , Figure 3 , Figure 5 as well as Figure 6 As shown, the impeller cylinder 3 includes two cylinders 31, which are symmetrically distributed vertically and connected to each other by screws to form a hollow cylinder. The outer surface of the hollow cylinder is tightly fitted to the inner wall of the rotating sealing ring 7, and multiple blades 37 are provided inside the hollow cylinder. The multiple blades 37 are inclined at a preset angle to convert the kinetic energy of the upward airflow into the kinetic energy of the hollow cylinder's rotation. The blades 37 are welded to the inner wall of the hollow cylinder and are inclined at a preset angle of 15°-30°. The inclination direction is adapted to the airflow direction, which can maximize the conversion of the axial kinetic energy of the airflow into the rotational kinetic energy of the hollow cylinder. The outer side of the cylinder 31 is fitted with an annular force-bearing block 32. The upper and lower annular force-bearing blocks 32 are provided with a first inclined surface 33 on opposite sides, with an inclination angle of 10°-15°. The upper and lower first inclined surfaces 33 are each provided with a first annular groove 34 on opposite sides. The first annular groove 34 is provided with a ball bearing 6 inside. The outer surface of the hollow cylinder is provided with a plurality of permanent magnet slots 35, which are distributed in an even number in a ring. The permanent magnet slots 35 are located between the upper and lower annular force-bearing blocks 32, and the upper and lower side walls of the slots are provided with locking grooves 36. Based on the above, the first annular groove 34 serves to place the ball 6, allowing the ball 6 to move along the direction of the first annular groove 34, thereby converting the sliding friction of the impeller cylinder 3 during rotation into rolling friction. At the same time, the permanent magnet slot 35 and the snap-fit ​​slot 36 serve to fix the permanent magnet 5, allowing the permanent magnet 5 to rotate with the impeller cylinder 3. The separate arrangement of the two cylinders 31 allows them to be installed inside the fixed cylinder 41 when connected by screws. They also restrict each other with the internal structure of the fixed cylinder 41, so that the impeller cylinder 3 can only rotate and cannot move vertically. The blades 37 can convert the kinetic energy of the vertical airflow into the kinetic energy of the impeller cylinder 3's rotation.

[0023] like Figure 2 , Figure 3 , Figure 7 as well as Figure 8 As shown, the stator winding includes a stator assembly 4 disposed inside the hollow semi-shell 21. The stator assembly 4 includes a fixed cylinder 41. A winding rod 45 is disposed on the outer surface of the fixed cylinder 41. The winding rod 45 extends into the interior of the limiting groove 24. The limiting groove 24 is used to limit the winding rod 45. A three-phase winding 46 is wound around the outside of the winding rod 45. The fixed cylinder 41 is provided with an annular inner block 42, which is located between the upper and lower annular force-bearing blocks 32. The upper and lower surfaces of the annular inner block 42 are provided with a second inclined surface 43 with an inclination angle of 10°-15°. The inclination direction and angle of the second inclined surface 43 are the same as those of the first inclined surface 33. A second annular groove 44 is provided on the surface of the second inclined surface 43 facing the first inclined surface 33. The ball bearing 6 is disposed between the first annular groove 34 and the second annular groove 44, and extends into the interior of both the first annular groove 34 and the second annular groove 44. Based on the above, the winding rod 45 provides an installation carrier for the three-phase winding 46. The three-phase winding 46 here is a common cable winding in the generator field, which is a very mature existing technology. Therefore, its specific structure and working principle are not described in detail here. The arrangement of the second inclined surface 43 and the first inclined surface 33 allows the two inclined surfaces to play a corrective role if there is a slight deviation during the rotation of the impeller cylinder 3. Furthermore, the first annular groove 34 and the second annular groove 44 cooperate with each other to provide space for the ball bearing 6 to move, allowing the ball bearing 6 to move along the direction of the two grooves.

[0024] like Figure 9 As shown, a permanent magnet 5 is provided inside the permanent magnet slot 35. Neodymium iron boron permanent magnets (N35-N52 models) are preferred. This material has high remanence (1.2-1.5T), high coercivity (≥800kA / m), and high magnetic energy product (260-490kJ / m³). It can generate a stable and sufficiently strong alternating magnetic field when the impeller cylinder 3 rotates. The permanent magnet 5 includes a magnet block 51. Both the upper and lower ends of the magnet block 51 are provided with locking blocks 52. The magnet block 51 is located inside the permanent magnet slot 35, and the locking blocks 52 extend into the inside of the locking groove 36. Based on the above, the locking block 52 is configured to cooperate with the locking groove 36, so that the magnet block 51 can be fixed inside the permanent magnet slot 35, thereby ensuring that the impeller cylinder 3 can drive the permanent magnet 5 to rotate together when it rotates.

[0025] Dust separation process: Dust-laden gas generated in the powder workshop enters the cyclone dust collector 1 under the action of a negative pressure fan. The air inlet rotates at high speed along the tangential direction of the cylinder of the cyclone dust collector with a flow velocity of 12-25m / s. Dust particles are thrown against the cylinder wall due to centrifugal force and fall down the wall to be collected in the ash hopper. The purified airflow is discharged from the central exhaust pipe of the cyclone dust collector and enters the energy recovery component.

[0026] Energy recovery process: The purified airflow enters the interior along the lower cylinder connected to the outer shell 2, impacting the blades 37 of the impeller cylinder 3 (blade tilt angle 15°-30°), converting axial kinetic energy into rotational kinetic energy of the impeller cylinder 3. At this time, the minimum airflow velocity for the impeller cylinder 3 to start rotating is 8-10 m / s. To prevent structural damage to the impeller cylinder 3 due to excessive rotation speed (such as blade breakage, increased ball wear), the maximum airflow velocity is 25 m / s, driving the impeller cylinder 3 to rotate around its own axis (rotation speed 1500-3000 r / min). The impeller cylinder 3 drives the external permanent magnet 5 to rotate synchronously, causing relative motion between the permanent magnet 5 and the external stator winding (three-phase winding 46). The stator winding cuts magnetic field lines to generate three-phase alternating current. The three-phase alternating current is transmitted through the lead wire to the external dedicated charging circuit (after rectification, filtering, and voltage stabilization), and converted into direct current and stored in the battery, realizing the recovery and reuse of exhaust kinetic energy.

[0027] Sealing and drag reduction: The rotating sealing ring 7 between the outer casing 2 and the impeller cylinder 3 can prevent dust from entering and contaminating the stator winding and permanent magnet; the ball bearing 6 rolls in the first annular groove 34 and the second annular groove 44, converting the sliding friction between the impeller cylinder 3 and the stator assembly 4 into rolling friction, significantly reducing rotational resistance and ensuring that the airflow can efficiently drive the impeller cylinder to rotate.

[0028] In summary, this dust collector converts the kinetic energy of the high-velocity airflow that was originally emitted directly into electrical energy (output power 500-1000W) by installing an energy recovery component at the exhaust port of the cyclone dust collector. This energy can be used for workshop lighting, powering equipment control modules, or stored in batteries for backup, reducing the workshop's dependence on the external power grid and lowering energy costs (calculated, a single unit can recover 3000-6000kWh of electrical energy per year, equivalent to 2000-4000 yuan in electricity costs). The airflow channel (with the inner diameter of the cylinder matching the exhaust port of the cyclone dust collector) and the impeller cylinder's structural design (optimized blade tilt angle) of the energy recovery component ensure that the resistance loss during airflow is ≤150Pa (far lower than the total resistance of the cyclone dust collector, which is 1500-2500Pa), and will not affect the normal operation of the cyclone dust collector or its dust separation efficiency (the dust removal efficiency remains ≥90%). The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dust collector for a powder processing workshop, characterized in that, include: Cyclone dust collector (1) and energy recovery assembly; The energy recovery component is located at the exhaust port of the cyclone dust collector (1) for the purpose of recovering energy. The energy recovery component includes a connecting shell (2), inside which a stator winding and a permanent magnet rotor are provided. The permanent magnet rotor includes an impeller cylinder (3), which is located on the air path of the exhaust airflow of the cyclone dust collector (1). The stator winding is sleeved on the outside of the permanent magnet rotor.

2. The dust collector according to claim 1, characterized in that, The connecting shell (2) includes two hollow half shells (21), and the two hollow half shells (21) are provided with mounting ears (26) on their sides. The two adjacent mounting ears (26) are connected to each other by screws and nuts to connect the two hollow half shells (21).

3. The dust collector according to claim 2, characterized in that, The hollow half-shell (21) is provided with a semi-cylinder (22) at both the upper and lower ends. The outer surface of the semi-cylinder (22) is provided with a semi-flange (23). Two adjacent semi-cylinders (22) form a cylinder. The cylinder is connected to the interior of the hollow half-shell (21). Two adjacent semi-flanges (23) form a flange. A limiting groove (24) is provided on the side wall inside the hollow half-shell (21). An installation groove (25) is provided on the opposite side of the upper and lower cylinders. A rotating sealing ring (7) is provided inside the installation groove (25).

4. The dust collector according to claim 3, characterized in that, The impeller cylinder (3) includes two cylinders (31), which are symmetrically distributed vertically and connected to each other by screws to form a hollow cylinder. The outer surface of the hollow cylinder is tightly fitted to the inner wall of the rotating sealing ring (7), and multiple blades (37) are provided inside the hollow cylinder. The multiple blades (37) are inclined at a preset angle to convert the kinetic energy of the upward airflow into the kinetic energy of the hollow cylinder's rotation.

5. The dust collector according to claim 4, characterized in that, The outer side of the cylinder (31) is fitted with an annular force-bearing block (32), and the upper and lower annular force-bearing blocks (32) are provided with a first inclined surface (33) on opposite sides. The upper and lower first inclined surfaces (33) are each provided with a first annular groove (34) on opposite sides. The first annular groove (34) is provided with a ball (6).

6. The dust collector according to claim 5, characterized in that, The outer surface of the hollow cylinder is provided with a plurality of permanent magnet slots (35), which are distributed in an even number in a ring. The permanent magnet slots (35) are located between the upper and lower ring force blocks (32), and the upper and lower side walls of the slots are provided with snap-fit ​​grooves (36).

7. The dust collector according to claim 6, characterized in that, The permanent magnet slot (35) is provided with a permanent magnet (5), the permanent magnet (5) includes a magnet block (51), and both the upper and lower ends of the magnet block (51) are provided with a locking block (52). The magnet block (51) is located inside the permanent magnet slot (35), and the locking block (52) extends into the inside of the locking groove (36).

8. The dust collector according to claim 5, characterized in that, The stator winding includes a stator assembly (4) disposed inside the hollow half-shell (21). The stator assembly (4) includes a fixed cylinder (41). A winding rod (45) is disposed on the outer surface of the fixed cylinder (41). The winding rod (45) extends into the interior of the limiting groove (24). The limiting groove (24) is used to limit the winding rod (45). A three-phase winding (46) is wound around the outside of the winding rod (45).

9. The dust collector according to claim 8, characterized in that, The fixed cylinder (41) is provided with an annular inner block (42) inside. The annular inner block (42) is located between the upper and lower annular force-bearing blocks (32). The upper and lower surfaces of the annular inner block (42) are provided with a second inclined surface (43). The inclination direction and angle of the second inclined surface (43) are consistent with the first inclined surface (33). The surface of the second inclined surface (43) facing the first inclined surface (33) is provided with a second annular groove (44). The ball (6) is located between the first annular groove (34) and the second annular groove (44) and extends into the interior of the first annular groove (34) and the second annular groove (44).

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