Granulator integrated with permanent magnet motor

Abstract

The utility model provides a granulator integrated with a permanent magnet motor, which comprises a granulation mechanism used for extrusion molding, the permanent magnet motor in driving connection with the granulation mechanism, a lower feeding mechanism connected with the granulation mechanism, and an upper feeding mechanism communicated with the lower feeding mechanism, the lower feeding mechanism and the upper feeding mechanism are connected in a closed mode. According to the granulator integrated with the permanent magnet motor, the technical problem of how to reduce the energy consumption of biological granulation is solved, the permanent magnet motor is adopted, and the interior of the rotor is hollow, so that the stability of a system is favorably improved; and meanwhile, an automatic feeding function is designed, so that manpower and cost are saved.

Description

Technical Field

[0001] This utility model belongs to the field of pellet mill technology, specifically relating to a pellet mill with an integrated permanent magnet motor. Background Technology

[0002] Energy conservation and environmental protection are key concerns worldwide. Therefore, high-efficiency, novel, energy-saving, and environmentally friendly products have become a focus of research. A biofuel pellet mill is a device used to compress biomass materials such as sawdust, straw, and rice husks into pellet-shaped fuel. By feeding the raw materials into a pressure chamber inside the equipment, they are compressed into pellets under high pressure. Biofuel pellets can serve as an alternative to traditional petroleum fuels, offering advantages such as high calorific value and low pollution. However, existing small and medium-sized biofuel pellet mills present the following technical challenges in operation:

[0003] (1) Most pellet mills currently use a motor to drive the pressure roller seat to rotate. The motor is connected to the pressure roller seat through a reduction mechanism. The design of the reduction mechanism will increase wear and lubrication oil consumption.

[0004] (2) Current motor drives have technical problems such as low operational stability and large rotational fluctuations;

[0005] (3) It does not have an automatic feeding function and mostly relies on manual feeding, which is time-consuming and labor-intensive, greatly increasing labor costs and affecting production efficiency. In addition, a large amount of dust and impurities will be generated during the discharge, affecting the surrounding environment.

[0006] This solution proposes a pellet mill with an integrated permanent magnet motor to address the aforementioned technical problems. Utility Model Content

[0007] The purpose of this invention is to provide a pellet mill with an integrated permanent magnet motor, which solves the technical problem of how to reduce energy consumption in bio-granulation. The use of a permanent magnet motor with a hollow rotor helps to increase the stability of the system. At the same time, an automatic feeding function is designed to save manpower and costs.

[0008] A pellet mill with an integrated permanent magnet motor includes a pelletizing mechanism for extrusion forming, a permanent magnet motor driven and connected to the pelletizing mechanism, a lower feeding mechanism connected to the pelletizing mechanism, and an upper feeding mechanism communicating with the lower feeding mechanism. The pelletizing mechanism is closedly connected to the lower feeding mechanism, and the lower feeding mechanism and the upper feeding mechanism are closedly connected.

[0009] The pelletizing mechanism includes a ring die base, a ring die coaxially fixed on the ring die base, a pressure roller base disposed on the inner side of the ring die, a pressure roller rotatably disposed on the pressure roller base, a pressure roller shaft passing through the center of the pressure roller, and a locking and limiting structure connected to the pressure roller shaft. A gap is provided between the pressure roller and the inner side of the ring die.

[0010] The bottom end face of the pressure roller seat is coaxially connected to the fixed shaft, and the fixed shaft is set through the center of the permanent magnet motor;

[0011] A bearing is coaxially arranged at one end near the fixed shaft, and a locking structure is connected to the other end of the fixed shaft. A pelletizing structure is also provided on the outside of the ring die.

[0012] The permanent magnet motor includes a stator, a rotor disposed inside the stator, and a hollow shaft passing through the center of the rotor. The bearing is connected to the hollow shaft, and the fixed shaft passes coaxially through the hollow shaft.

[0013] The hollow shaft is coaxially and fixedly driven to the ring mold base.

[0014] The lower feeding mechanism includes a positioning plate, a push shaft passing through the center of the positioning plate, multiple feeding blades connected to the outside of the push shaft, a first conveyor cylinder and a second conveyor cylinder coaxially connected to both sides of the positioning plate, and a housing coaxially connected to the positioning plate. The housing is coaxially sleeved on the outside of the second conveyor cylinder and connected to the push shaft and the rotational power mechanism. The bottom end of the housing is provided with a discharge port and the top end is provided with a steam extraction port.

[0015] The upper end face of the conveyor cylinder is connected to the bottom end of the vertical channel, and a manual feed port is provided on the outer side of the vertical channel.

[0016] The upper feeding mechanism includes a horizontal channel with one end connected to the top of the vertical channel, a material receiving trough plate connected to the other end of the horizontal channel, a spiral feeding structure passing through the horizontal channel and the material receiving trough plate, and a crushing structure disposed on the material receiving trough plate.

[0017] The spiral feeding structure includes a feeding shaft, a spiral blade sleeved on the outside of the feeding shaft, and a rotary motor connected to the feeding shaft.

[0018] The pulverizing structure includes a horizontally arranged stirring shaft and multiple stirring blades arranged outside the stirring shaft. One end of the stirring shaft is connected to a drive motor via a transmission belt.

[0019] The rotary power mechanism includes a power motor and a second transmission belt, which is connected to a pulley at one end of the drive shaft.

[0020] The locking and limiting structure includes a locking gear coaxially connected to the pressure roller shaft, a protrusion fixed to the outside of the locking gear, and two threaded rods with one end abutting against both sides of the protrusion. The other end of the threaded rod passes through the fixing block and is provided with a nut.

[0021] The pelletizing structure includes a telescopic cylinder and a scraper blade fixedly connected to the free end of the telescopic cylinder, with the scraper blade positioned near the outer side of the ring die.

[0022] Multiple pelletizing structures can be designed, located at different positions on the outside of the ring die, in order to increase pelletizing efficiency.

[0023] This utility model achieves the following significant effects:

[0024] (1) A hollow shaft is provided, and a fixed shaft is inserted in the hollow shaft. Since the iron core has no potential mechanical loss, the motor operation stability is very reliable. Moreover, its volume and weight are free from the limitations of the traditional iron core, and there is a lot of room for expansion design. The fluctuation frequency and time of the hollow motor are much smaller than those of the traditional motor.

[0025] Moreover, the hollow shaft design allows the fixed shaft to be directly connected to the permanent magnet motor, eliminating the need for a gear reduction mechanism and avoiding wear and lubrication consumption.

[0026] (2) The permanent magnet motor designed in this scheme eliminates the excitation winding, carbon brush and slip ring structure of the excitation generator, reducing the number of fault points and wear parts, and improving the reliability of operation compared with ordinary motors.

[0027] (3) Design a lower feeding structure and an upper feeding structure. You only need to place the material in the material receiving trough. Under the action of spiral feeding and gravity, the material continuously enters the pressure roller and the ring die, saving manpower and cost and improving production efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the pellet mill structure in this utility model. Figure 1 .

[0029] Figure 2 This is a schematic diagram of the pellet mill structure in this utility model. Figure 2 .

[0030] Figure 3 This is a schematic diagram of the connection structure of the permanent magnet motor, granulation mechanism and lower feeding structure in this utility model.

[0031] Figure 4 This is a schematic diagram of the connection structure between the permanent magnet motor and the granulation mechanism in this utility model.

[0032] Figure 5 This is a schematic diagram of the internal structure of the permanent magnet motor in this utility model.

[0033] Figure 6 This is a schematic diagram of the internal structure of the lower feeding structure in this utility model.

[0034] Figure 7This is a schematic diagram of the feeding mechanism and the upper feeding structure in this utility model.

[0035] Figure 8 This is a schematic diagram of the connection structure between the outer shell and the pelletizing structure in this utility model.

[0036] The attached diagram is labeled as follows: 1. Base; 2. Outer shell; 21. Steam extraction port; 22. Pelletizing structure; 221. Telescopic cylinder; 222. Scraper blade; 23. Discharge port; 3. Stator; 31. Rotor; 32. Bearing; 33. Hollow shaft; 34. Embedded hole; 4. Protective shell; 5. Drive motor; 6. Transmission belt one; 7. Stirring shaft; 8. Spiral feeding structure; 9. Horizontal channel; 10. Manual feed port; 11. Vertical channel; 12. Power motor; 13. Transmission belt two; 131. Pulley; 14. Conveyor cylinder one; 15. Push shaft; 151. Feeding blade; 16. Conveyor cylinder two; 17. Ring die; 171. Pressure roller; 172. Locking gear; 173. Threaded rod; 174. Support plate; 18. Positioning plate; 19. Material receiving trough plate. Detailed Implementation

[0037] To more clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0038] See Figures 1-8 A pellet mill integrating a permanent magnet motor includes a base 1, a pelletizing mechanism for extrusion forming, a permanent magnet motor driven and connected to the pelletizing mechanism, a lower feeding mechanism connected to the pelletizing mechanism, and an upper feeding mechanism communicating with the lower feeding mechanism. The pelletizing mechanism and the lower feeding mechanism are closedly connected, and the lower feeding mechanism and the upper feeding mechanism are also closedly connected. The permanent magnet motor is mounted on the base 1.

[0039] The pelletizing mechanism includes a ring die base, a ring die 17 coaxially fixed on the ring die base, pressure roller seats respectively disposed on the inner and outer sides of the ring die 17, a pressure roller 171 rotatably disposed on the pressure roller seat, a pressure roller shaft passing through the center of the pressure roller 171, and a locking and limiting structure connected to the pressure roller shaft. A gap is provided between the pressure roller 171 and the inner side of the ring die 17.

[0040] The bottom end face of the pressure roller seat is coaxially connected to the fixed shaft, which passes through the center of the permanent magnet motor;

[0041] A bearing 32 is coaxially mounted on one end near the fixed shaft, and a locking structure is connected to the other end of the fixed shaft. A pelletizing structure is also provided on the outer side of the ring die 17.

[0042] The pelletizing structure is an existing technology. For example, multiple cutters can be arranged around the outer side of the ring die 17, and the multiple cutters can make circumferential circular motions. This will not be described in detail here.

[0043] The permanent magnet motor includes a stator 3, a rotor 31 disposed inside the stator 3, a hollow shaft 33 passing through the center of the rotor 31, a bearing 32 connected to the hollow shaft 33, and a fixed shaft coaxially passing through the hollow shaft 33.

[0044] The hollow shaft 33 is coaxially fixed and driven to the ring mold base.

[0045] More preferably, a protective shell 4 is provided on the outer side of one end of the stator 3; and an embedding hole 34 is provided in the center of the hollow shaft 33.

[0046] It should be noted that in this scheme, the ring mold seat rotates under the drive of the hollow shaft 33, which in turn drives the ring mold 17 to rotate coaxially, while the fixed shaft and the pressure roller seat do not rotate. Under the action of the locking structure, the fixed shaft is positioned. The locking structure can be any mechanical structure, as long as the outer end of the fixed shaft is positioned. For example, bolts or gears can be used for limiting. For the sake of simplifying the design, it is not shown in the attached drawings.

[0047] The lower feeding mechanism includes a positioning plate 18, a push shaft 15 passing through the center of the positioning plate 18, multiple feeding blades 151 connected to the outside of the push shaft 15, a first conveyor cylinder 14 and a second conveyor cylinder 16 coaxially connected to both sides of the positioning plate 18, and a housing 2 coaxially connected to the positioning plate 18. The housing 2 is coaxially sleeved on the outside of the second conveyor cylinder 16 and connected to the push shaft 15 and the rotational power mechanism. The bottom end of the housing 2 is provided with a discharge port 23 and the top end is provided with a steam extraction port 21; the steam extraction port 21 is used to discharge water vapor.

[0048] The upper end of the conveyor cylinder 14 is connected to the bottom end of the vertical channel 11, and a manual feed port 10 is provided on the outside of the vertical channel 11.

[0049] The rotary power mechanism includes a power motor 12 and a transmission belt 13, which is connected to a pulley 131 at one end of the drive shaft 15. Similarly, a pulley structure is also designed on the motor shaft of the power motor 12, and the pulley 131 is connected to the pulley structure through the transmission belt 13. Both the pulley 131 and the pulley structure are existing technologies and will not be described in detail here.

[0050] The outer casing 2 is also connected to the stator 3, forming a fixation for the first conveyor cylinder 14 and the second conveyor cylinder 16.

[0051] The upper feeding mechanism includes a horizontal channel 9 connected to the top of the vertical channel 11 at one end, a material receiving trough plate 19 connected to the other end of the horizontal channel 9, a spiral feeding structure 8 passing through the horizontal channel 9 and the material receiving trough plate 19, and a crushing structure set on the material receiving trough plate 19.

[0052] The spiral feeding structure 8 includes a feeding shaft, a spiral blade sleeved on the outside of the feeding shaft, and a rotary motor connected to the feeding shaft.

[0053] The mixing structure includes a horizontally positioned stirring shaft 7 and multiple stirring blades positioned outside the stirring shaft 7. One end of the stirring shaft 7 is connected to a drive motor 5 via a transmission belt 6. The stirring blades can have any shape, as long as the mixing and crushing effect is achieved.

[0054] The locking and limiting structure includes a support plate 174, a locking gear 172 coaxially connected to the pressure roller shaft, a protrusion fixed to the outside of the locking gear 172, and two threaded rods 173 with one end abutting against both sides of the protrusion. The other end of the threaded rods 173 passes through the fixing block and is provided with a nut.

[0055] When the locking and limiting structure is in use, the rotation angle of the protrusion is adjusted by turning the two opposing threaded rods 173, thereby adjusting the gap between the pressure roller 171 and the ring die 17. Because the pressure roller shaft is eccentrically connected to the pressure roller, the rotation of the pressure roller shaft can cause a slight change in the actual position of the pressure roller 171. This is existing technology and will not be described in detail here.

[0056] The pelletizing structure includes a telescopic cylinder 221 and a scraper blade 222 fixedly connected to the free end of the telescopic cylinder 221. The scraper blade 222 is located near the outer side of the ring die 17.

[0057] The scraper blade 222 is an existing structure, located near the outer side of the ring die 17, and is used to cut the particles discharged from the ring die 17 into granules.

[0058] The specific working process of this utility model is as follows:

[0059] This design incorporates both a lower and upper feeding structure. During operation, the material is placed in the receiving trough 19. Under the action of the crushing structure, large pieces of material are cut into smaller pieces, facilitating transportation and unloading. Under the action of the spiral feeding structure 8, the chopped material is transferred to the horizontal channel 9 and the vertical channel 11, and then enters the first conveyor cylinder 14. Under the action of the push shaft 15 and the feeding blades 151, the material is pushed from the first conveyor cylinder 14 to the second conveyor cylinder 16, and then enters the ring die 17. During the extrusion process between the ring die 17 and the pressure roller 171, the material is shaped and granulated.

[0060] The device includes a housing 2 located outside the ring die 17. When the extruded particles are extruded from the ring die 17, they are cut into granules by the pelletizing structure and flow out through the discharge holes designed on the housing 2.

[0061] The hollow shaft 33 is provided and makes movable contact with the fixed shaft. Since the iron core has no potential mechanical loss, the motor operation is very reliable. Moreover, its size and weight are free from the limitations of the traditional iron core, and there is a lot of room for expansion design. The fluctuation frequency and time of the hollow motor are much smaller than those of the traditional motor.

[0062] Moreover, the hollow shaft 33 design eliminates the need for a gear reduction mechanism, thus avoiding wear and lubrication consumption.

[0063] This design incorporates a permanent magnet motor, which eliminates the need for the excitation winding, carbon brushes, and slip rings of a traditional generator, reducing potential failure points and wear parts, thus improving operational reliability compared to conventional motors.

[0064] The technical features of this utility model not described can be implemented by or by using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A pellet mill incorporating a permanent magnet electric motor, characterized by, The application relates to a granulating mechanism for extrusion molding, a permanent magnet motor in driving connection with the granulating mechanism, a lower feeding mechanism connected with the granulating mechanism, and an upper feeding mechanism in communication with the lower feeding mechanism.

2. A pellet mill incorporating a permanent magnet electric motor as claimed in claim 1 wherein, The granulating mechanism comprises a ring die seat, a ring die (17) coaxially fixed on the ring die seat, a pressure roller seat arranged on the inner side of the ring die (17), a pressure roller (171) rotatably arranged on the pressure roller seat, a pressure roller shaft penetrating through the center of the pressure roller (171), locking and limiting structures connected with the pressure roller shaft, a gap arranged between the pressure roller (171) and the inner side of the ring die (17), and a fixed shaft coaxially connected with the bottom end surface of the pressure roller seat, wherein the fixed shaft is arranged through the center of the permanent magnet motor. One end of the fixed shaft is coaxially arranged with a bearing (32), and the other end of the fixed shaft is connected with a locking structure.

3. A pellet mill incorporating a permanent magnet electric motor as claimed in claim 2 wherein, The permanent magnet motor comprises a stator (3), a rotor (31) arranged in the stator (3), and a hollow shaft (33) penetrating through the center of the rotor (31), wherein the bearing (32) is connected with the hollow shaft (33), and the fixed shaft is coaxially arranged through the hollow shaft (33). The hollow shaft (33) is coaxially fixedly and drivingly connected with the ring die seat.

4. A pellet mill incorporating a permanent magnet electric motor as claimed in claim 1 wherein, The lower feeding mechanism comprises a positioning plate (18), a pushing shaft (15) penetrating through the center of the positioning plate (18), a plurality of feeding blades (151) connected on the outer side of the pushing shaft (15), a conveying cylinder one (14) and a conveying cylinder two (16) coaxially connected on the two sides of the positioning plate (18) respectively, and an outer shell (2) coaxially connected on the positioning plate (18), wherein the outer shell (2) is coaxially sleeved on the outer side of the conveying cylinder two (16), the pushing shaft (15) is connected with a rotary power mechanism, the bottom end of the outer shell (2) is provided with a discharging port (23), and the upper end is provided with a steam extraction port (21). The upper end surface of the conveying cylinder one (14) is in communication with the bottom end of a vertical channel (11), and the outer side of the vertical channel (11) is provided with a manual feeding port (10).

5. A pellet mill incorporating a permanent magnet electric motor as claimed in claim 4 wherein, The upper end of the vertical channel (11) is in communication with a horizontal channel (9), the other end of the horizontal channel (9) is in communication with a material receiving groove plate (19), a spiral feeding structure (8) is arranged in the horizontal channel (9) and the material receiving groove plate (19), and a crushing structure is arranged on the material receiving groove plate (19).

6. A pellet mill incorporating a permanent magnet electric motor as claimed in claim 5 wherein, The spiral feeding structure (8) comprises a feeding shaft, a spiral blade sleeved on the outer side of the feeding shaft, and a rotary motor connected with the feeding shaft.

7. A pellet mill incorporating a permanent magnet electric motor as claimed in claim 5 wherein, The crushing structure comprises a horizontally arranged stirring shaft (7), a plurality of stirring knives arranged on the outer side of the stirring shaft (7), and one end of the stirring shaft (7) is connected with a driving motor (5) through a transmission belt one (6).

8. A pellet mill incorporating a permanent magnet electric motor as claimed in claim 4 wherein, The rotating power mechanism comprises a power motor (12) and a second transmission belt (13), and the second transmission belt (13) is connected with a belt pulley (131) arranged at one end of the pushing shaft (15).

9. A pellet mill incorporating a permanent magnet electric motor as claimed in claim 2 wherein, The locking and limiting structure comprises a locking gear (172) coaxially connected to the pressing roller shaft, a protruding part fixed to the outer side of the locking gear (172), and two threaded rods (173) with one end respectively abutting on both sides of the protruding part, and the other end of the threaded rod (173) penetrates through the fixed block and is provided with a nut.

10. A pellet mill incorporating a permanent magnet electric motor as claimed in claim 2 wherein, The cutting structure comprises a telescopic cylinder (221) and a scraper blade (222) fixedly connected to the free end of the telescopic cylinder (221), and the scraper blade (222) is arranged close to the outer side of the ring die (17).

Images