High-voltage permanent-magnet direct-drive stirring motor

Abstract

The invention discloses a high-voltage permanent-magnet direct-drive stirring motor which comprises a machine shell, a machine cover, an output shaft, a stator frame, a stator and a rotor, the machine shell is provided with the machine cover which is tightly fixed through bolts, the output shaft, the stator frame, the stator and the rotor are installed in the machine shell, the stator frame is fixed to the machine shell through a base, and the stator frame is fixed to the machine shell through the base. The stator frame is rotatably connected with the output shaft through the inner bearing, and the outer side of the stator frame is provided with the iron core assembly. According to the high-voltage permanent-magnet direct-drive stirring motor, the motor adopts an outer rotor high-voltage direct-drive technology, a rotor part adopts a surface-mounted structure with multiple pairs of poles, a flange plate and a driving shaft are mounted at the bottom of the rotor, the driving shaft is directly connected with stirring equipment, and a stator part adopts a high-voltage forming coil, so that current and power transmission pressure are reduced; and a rotor permanent magnet magnetic field interacts with a rotating magnetic field generated by the stator winding to generate torque so as to directly drive the stirring equipment.

Description

Technical Field

[0001] The invention relates to the technical field of special motor design and manufacturing, in particular to a high-voltage permanent magnet direct-drive stirring motor. Background Art

[0002] Since my country promoted the "Large-Scale Equipment Renewal Action Plan", all parts of the country have promoted equipment renewal and transformation in the direction of intelligent upgrading, safe production, loss reduction and efficiency improvement. Among industrial equipment, permanent magnet direct drive motors have received widespread attention due to their advantages in energy efficiency improvement and low-carbon emission reduction.

[0003] With the continuous development of my country's rare earth resource refining technology and high-voltage power electronics technology, permanent magnet direct-drive motors currently have advantages in output performance, control accuracy, and intelligent control.

[0004] The stirring transmission device in the food additive biological fermentation industry currently uses the traditional asynchronous motor + reducer method, which is heavy, complex to install and has high requirements. It is prone to oil leakage during operation and does not meet the food safety requirements for food additives.

[0005] Technical defects and their causes 1. The traditional stirring drive system consists of an asynchronous motor and a reducer. This type of drive has a low overall efficiency due to the large number of transmission links. At the same time, there is a risk of leakage in the reducer and other equipment, which may contaminate the product and require a large amount of daily maintenance work.

[0006] 2. The internal space of the existing high-power inner rotor permanent magnet direct-drive stirring motor rotor is only used to transmit torque, and the internal space of the motor is not fully utilized, resulting in a large motor size, which is not conducive to equipment installation and maintenance.

[0007] 3. The existing air-cooled outer rotor high-voltage permanent magnet direct-drive stirring motor has a large motor size due to its high insulation thickness and limited air-cooling heat dissipation capacity, which is not conducive to equipment installation and maintenance. Summary of the invention

[0008] The object of the present invention is to provide a high-voltage permanent magnet direct-drive stirring motor to solve the problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions: A high-voltage permanent magnet direct-drive stirring motor comprises a casing, a cover, an output shaft, a stator frame, a stator and a rotor, wherein the casing is provided with a cover tightly fixed by bolts, the casing is provided with an output shaft, a stator frame, a stator and a rotor, the stator frame is fixed to the casing through a base, the stator frame is rotatably connected to the output shaft through an inner bearing, an iron core assembly is installed on the outer side of the stator frame, a coil is wound on the outer side of the iron core assembly, and a permanent magnet located on the outer side of the iron core assembly is installed inside the rotor; An oil cooler and a micro oil pump are installed in the engine cover, an oil guide groove is opened in the core assembly, and the coolant in the oil cooler circulates in the oil guide groove of the core assembly through the micro oil pump.

[0010] As a further solution of the present invention: the core assembly is composed of silicon steel sheets stacked on each other, and the silicon steel sheets include a front cover plate, a rear cover plate, a stacking plate and an oil return plate. The front cover plate and the rear cover plate are located on both sides, the stacking plate is located in the middle, and the oil return plate is located between the stacking plate and the rear cover plate. Longitudinally arranged oil distribution grooves are provided on both sides of the stacking plate, and an oil return hole is provided in the middle position of the top. An oil collecting cavity covering the oil distribution grooves and the distribution positions of the oil return holes is provided in the oil return plate, and two oil inlet terminals connected to the oil distribution grooves are provided on the rear cover plate.

[0011] As a further solution of the present invention: the stator frame is equipped with an end cover fixed by bolts, and the cover plate, the rear cover plate, the superimposed plate and the oil return plate are compressed and sealed by locking the end cover.

[0012] As a further solution of the present invention: the iron core assembly is an integrated silicon steel core, an oil guide groove is provided in the silicon steel core, the oil guide groove is arranged close to the periphery of the silicon steel core, an oil return hole is arranged inside for returning oil, and ports are provided at both the oil inlet and outlet ends.

[0013] As a further solution of the present invention: the core assembly is fixed on the oil separator seat, the core assembly is an integrated silicon steel core, an oil guide groove is provided in the silicon steel core, the oil guide groove is arranged close to the periphery of the silicon steel core, an oil return hole is arranged inside to return oil, and a port connected to the oil guide groove and the oil return hole of the core assembly is provided on the oil separator seat.

[0014] As a further solution of the present invention: the port is divided into an oil inlet terminal and an oil return hole, the oil inlet terminal is connected to the oil cooler through an oil inlet pipeline, the oil return hole is connected to the oil inlet end of the micro oil pump through an oil discharge pipeline, and the oil outlet end of the micro oil pump is connected to the oil cooler to form a circulation.

[0015] As a further solution of the present invention: a filter plate is provided on the machine cover, one side of the oil cooler is fitted with the filter plate, a partition is provided inside the casing, the partition separates the cold oil area of ​​the oil cooler from the driving area of ​​the stator and the rotor, and the output shaft is fixed with a linkage shaft extending to the cold oil area, centrifugal fan blades are installed on the outside of the linkage shaft, and the casing is provided with an air outlet hole located on the outside of the centrifugal fan blades.

[0016] As a further solution of the present invention: the outer sides of the output shaft and the linkage rotating shaft are respectively connected to the corresponding carriers through external bearings and are provided with labyrinth seals.

[0017] As a further solution of the present invention: the connection between the rotor and the output shaft is connected via an inclined guide plate, and the inclined guide plate drives the airflow to circulate during the rotation process.

[0018] As a further solution of the present invention: the oil cooler is provided with an oil port for exhausting air and changing oil, and the oil port is sealed by a bolt.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. The high-voltage permanent magnet direct-drive stirring motor of the present invention adopts an outer rotor high-voltage direct-drive technology, the rotor part adopts a multi-pole surface-mounted structure, a flange and a drive shaft are installed at the bottom of the rotor, the drive shaft is directly connected to the stirring equipment, and the stator part adopts a high-voltage molded coil, thereby reducing the current and power transmission pressure, and the torque is generated by the interaction between the magnetic field of the rotor permanent magnet and the rotating magnetic field generated by the stator winding, thereby directly driving the stirring equipment.

[0020] 2. The high-voltage permanent magnet direct-drive stirring motor innovatively adopts high-voltage direct-drive oil cooling technology. An oil circuit is set between the rotor permanent magnet and the stator forming coil and the stator yoke, and the direct contact of the cooling oil with the permanent magnet and the forming coil is used to improve the heat dissipation capacity of the forming coil and the permanent magnet, thereby improving the power density of the motor and reducing the size of the motor.

[0021] 3. The high-voltage permanent magnet direct-drive stirring motor of the present invention utilizes the closed space of the cup-shaped rotor structure to design a closed oil cooling path, thereby avoiding the hidden danger of oil leakage caused by dynamic sealing problems, thereby eliminating product contamination during equipment operation and meeting food safety requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a high-voltage permanent magnet direct-drive stirring motor; Figure 2 This is a schematic diagram of the oil circuit connection in a high-voltage permanent magnet direct-drive stirring motor; Figure 3 A schematic diagram of the combined structure of silicon steel sheets of an iron core assembly in a high-voltage permanent magnet direct-drive stirring motor; Figure 4 This is an exploded view of the silicon steel sheet assembly structure of a core assembly in a high-voltage permanent magnet direct-drive stirring motor; Figure 5 It is a schematic diagram of the structure of an integrated silicon steel core in a high-voltage permanent magnet direct-drive stirring motor; Figure 6 This is a structural schematic diagram of an oil separator in a high-voltage permanent magnet direct-drive stirring motor; Figure 7 This is a schematic diagram of the structure of an inclined guide plate in a high-voltage permanent magnet direct-drive stirring motor.

[0023] In the figure: 1. casing; 2. cover; 3. output shaft; 4. base; 5. inner bearing; 6. stator frame; 7. core assembly; 701. front cover; 702. rear cover; 703. superposition plate; 704. oil distribution groove; 705. oil return hole; 706. oil inlet terminal; 707. oil collecting chamber; 708. oil return plate; 8. rotor; 9. end cover; 10. filter plate; 11. oil cooler; 12. micro oil pump; 13. partition; 14. centrifugal fan blade; 15. coil; 16. linkage shaft; 17. inclined guide plate; 18. outer bearing; 19. oil port; 20. air outlet hole; 21. oil inlet pipeline; 22. oil discharge pipeline; 23. oil distributor. DETAILED DESCRIPTION

[0024] See also Figures 1 to 7 In an embodiment of the present invention, a high-voltage permanent magnet direct-drive stirring motor comprises a casing 1, a cover 2, an output shaft 3, a stator frame 6, a stator 7 and a rotor 8. The casing 1 is provided with a cover 2 tightly fixed by bolts, and the casing 1 is provided with an output shaft 3, a stator frame 6, a stator 7 and a rotor 8. The stator frame 6 is fixed to the casing 1 through a base 4, and the stator frame 6 is rotatably connected to the output shaft 3 through an inner bearing 5. An iron core assembly 7 is installed on the outer side of the stator frame 6, and a coil 15 is wound on the outer side of the iron core assembly 7. A permanent magnet located on the outer side of the iron core assembly 7 is installed inside the rotor 8. In the present invention, the motor adopts an outer rotor 8 high-voltage direct-drive technology, and the rotor 8 part adopts a multi-pole surface mount structure. The bottom of the rotor 8 is directly connected to the output shaft 3, and the output shaft 3 is directly connected to the stirring device. The stator 7 part adopts a high-pressure formed coil 15, thereby reducing the current and transmission pressure, and the torque is generated by the interaction between the magnetic field of the permanent magnet of the rotor 8 and the rotating magnetic field generated by the stator winding, thereby directly driving the stirring device; An oil cooler 11 and a micro oil pump 12 are installed in the cover 2, and an oil guide groove is provided in the core assembly 7. The coolant in the oil cooler 11 circulates in the oil guide groove of the core assembly 7 through the micro oil pump 12. The present invention innovatively adopts high-voltage direct-drive oil cooling technology, and an oil circuit is set between the permanent magnets of the rotor 8 and the formed coils of the stator 7 and the yoke of the stator 7. The direct contact of the cooling oil with the permanent magnets and the formed coils is used to improve the heat dissipation capacity of the formed coils and the permanent magnets, thereby improving the power density of the motor and reducing the size of the motor. In the present invention, a closed oil cooling path is designed by utilizing the closed space of the cup-shaped rotor structure, thereby avoiding the hidden danger of oil leakage caused by dynamic sealing problems, thereby eliminating product contamination during equipment operation and meeting food safety requirements.

[0025] In a preferred embodiment, the core assembly 7 is composed of silicon steel sheets stacked on each other, and the silicon steel sheets include a front cover plate 701, a rear cover plate 702, a stacking plate 703 and an oil return plate 708. The front cover plate 701 and the rear cover plate 702 are located on both sides, the stacking plate 703 is located in the middle, and the oil return plate 708 is located between the stacking plate 703 and the rear cover plate 702. The stacking plate 703 is provided with longitudinally arranged oil distribution grooves 704 on both sides, an oil return hole 705 is provided in the middle of the top, and an oil return plate 708 is provided in the inner An oil collecting chamber 707 is provided which covers the oil distribution groove 704 and the oil return hole 705. Two oil inlet terminals 706 which are connected to the oil distribution groove 704 are provided on the rear cover plate 702. Different types of oil circuits need to be opened according to different core styles. The oil circuits need to be as close to the coil 15 as possible for better heat exchange. The silicon steel sheets are combined so that their length can be better adapted to motors of various specifications. The silicon steel sheets are tightly connected by pressing and coating to minimize oil leakage and improve sealing.

[0026] In a preferred embodiment, the stator frame 6 is equipped with an end cover 9 fixed by bolts. The cover plate 701, the rear cover plate 702, the stacking plate 703 and the oil return plate 708 are compressed and sealed by locking the end cover 9. The end cover 9 plays a role in strengthening the pressure and improving the sealing between the silicon steel sheets.

[0027] In a preferred embodiment, the core assembly 7 is an integrated silicon steel core, an oil guide groove is provided inside the silicon steel core, the oil guide groove is arranged close to the periphery of the silicon steel core, an oil return hole 705 is provided inside for oil return, and ports are provided at the oil inlet and outlet ends. The integrated silicon steel core has an oil guide groove inside, which will have better sealing performance.

[0028] In a preferred embodiment, the core assembly 7 is fixed on the oil separator seat 23. The core assembly 7 is an integrated silicon steel core. An oil guide groove is provided in the silicon steel core. The oil guide groove is arranged close to the periphery of the silicon steel core. An oil return hole 705 is provided inside to return oil. A port connected to the oil guide groove of the core assembly 7 and the oil return hole 705 is provided on the oil separator seat 23. The technical solution of the invention can be used corresponding to different motor coil arrangements.

[0029] In a preferred embodiment, the port is divided into an oil inlet terminal 706 and an oil return hole 705. The oil inlet terminal 706 is connected to the oil cooler 11 through an oil inlet pipeline 21. The oil return hole 705 is connected to the oil inlet end of the micro oil pump 12 through an oil discharge pipeline 22. The oil outlet end of the micro oil pump 12 is connected to the oil cooler 11 to form a circulation. The present invention provides power for the circulation of cooling oil by extracting through the micro oil pump 12, and at the same time generates negative pressure in the oil circuit to avoid leakage of cooling oil due to positive pressure in the oil circuit, causing food contamination.

[0030] In a preferred embodiment, a filter plate 10 is provided on the cover 2, one side of the oil cooler 11 is fitted with the filter plate 10, a partition 13 is provided inside the casing 1, the partition 13 separates the cold oil area of ​​the oil cooler 11 from the driving area of ​​the stator 7 and the rotor 8, and the output shaft 3 is fixed with a linkage shaft 16 extending to the cold oil area, the outer side of the linkage shaft 16 is installed with a centrifugal fan blade 14, and the casing 1 is provided with an air outlet hole 20 located on the outer side of the centrifugal fan blade 14. The oil cooler 11 is a prior art, and the oil cooler 11 can be a plate oil cooler. The heat dissipation principle is also through heat exchange. Therefore, the oil cooler 11 is arranged on the machine cover 2 and is in contact with the outside air. During the driving process of the equipment, the output shaft 3 will drive the linkage shaft 16 to rotate together. The diameter of the linkage shaft 16 is smaller than the diameter of the output shaft 3. This can reduce the size of the sealing area. The linkage shaft 16 drives the centrifugal fan blades 14 to rotate, and the air flow is discharged from the air outlet holes 20 through centrifugal force. Negative pressure is generated in the machine cover 2, and air enters the gap of the oil cooler 11 for heat exchange, forming an external circulation of air flow, which accelerates the cooling speed of the cooling oil.

[0031] In a preferred embodiment, the outer sides of the output shaft 3 and the linkage shaft 16 are connected to the corresponding carriers through external bearings 18, and are provided with labyrinth seals. The cold oil area of ​​the oil cooler 11 is separated from the driving area of ​​the stator 7 and the rotor 8 by the partition 13. The labyrinth seal and the external bearing 18 can effectively improve the sealing performance, prevent external dust or water from entering the driving area, and improve the operating stability and safety of the equipment.

[0032] In a preferred embodiment, the connection between the rotor 8 and the output shaft 3 is connected through an inclined guide plate 17. The inclined guide plate 17 drives the airflow circulation during the rotation process, circulates the internal airflow to the outside, contacts the casing 1, and dissipates heat through the heat sink on the casing 1. During the circulation process, the airflow around the coil 15 can be dredged to the outside of the rotor 8, thereby improving the heat dissipation efficiency of the equipment.

[0033] In a preferred embodiment, the oil cooler 11 is provided with an oil port 19 for exhaust and oil change. The oil port 19 is sealed by bolts. Since the cooling oil is extracted and circulated by negative pressure, there is a probability that gas will enter the oil circuit. The cooling oil reserve and the amount of air are checked at a fixed period, and the oil is exhausted or the cooling oil is replaced and replenished through the oil port 19.

[0034] It should be noted that the above embodiments all belong to the same inventive concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference may be made to the description in other embodiments.

[0035] The above-mentioned embodiments only express the implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A high-voltage permanent magnet direct-drive stirring motor, comprising a casing (1), a cover (2), an output shaft (3), a stator frame (6), a stator (7) and a rotor (8), wherein the casing (1) is provided with a cover (2) tightly fixed by bolts, and the casing (1) is provided with an output shaft (3), a stator frame (6), a stator (7) and a rotor (8), characterized in that: The stator frame (6) is fixed to the housing (1) via a base (4), the stator frame (6) is rotatably connected to the output shaft (3) via an inner bearing (5), an iron core assembly (7) is mounted on the outside of the stator frame (6), a coil (15) is wound around the outside of the iron core assembly (7), and a permanent magnet located on the outside of the iron core assembly (7) is mounted inside the rotor (8); An oil cooler (11) and a micro oil pump (12) are installed in the engine cover (2), an oil guide groove is provided in the iron core assembly (7), and the coolant in the oil cooler (11) circulates in the oil guide groove of the iron core assembly (7) through the micro oil pump (12).

2. A high-voltage permanent magnet direct-drive stirring motor according to claim 1, characterized in that: The core assembly (7) is composed of silicon steel sheets stacked on each other, the silicon steel sheets comprising a front cover plate (701), a rear cover plate (702), a stacking plate (703) and an oil return plate (708), the front cover plate (701) and the rear cover plate (702) being located on both sides, the stacking plate (703) being located in the middle, and the oil return plate (708) being located between the stacking plate (703) and the rear cover plate (702), longitudinally arranged oil distribution grooves (704) being provided on both sides of the stacking plate (703), an oil return hole (705) being provided in the middle of the top, an oil collecting cavity (707) covering the distribution positions of the oil distribution grooves (704) and the oil return holes (705) being provided in the oil return plate (708), and two oil inlet terminals (706) being connected to the oil distribution grooves (704) being provided on the rear cover plate (702).

3. A high-voltage permanent magnet direct-drive stirring motor according to claim 2, characterized in that: The stator frame (6) is equipped with an end cover (9) fixed by bolts, and the cover plate (701), the rear cover plate (702), the stacking plate (703) and the oil return plate (708) are compressed and sealed by locking the end cover (9).

4. A high-voltage permanent magnet direct-drive stirring motor according to claim 1, characterized in that: The iron core assembly (7) is an integrated silicon steel core, an oil guide groove is provided in the silicon steel core, the oil guide groove is arranged close to the outer periphery of the silicon steel core, an oil return hole (705) is provided inside for oil return, and ports are provided at both the oil inlet and the oil outlet.

5. A high-voltage permanent magnet direct-drive stirring motor according to claim 1, characterized in that: The iron core assembly (7) is fixed on the oil separator seat (23). The iron core assembly (7) is an integrated silicon steel core. An oil guide groove is provided in the silicon steel core. The oil guide groove is arranged close to the outer periphery of the silicon steel core. An oil return hole (705) is provided inside for returning oil. A port communicating with the oil guide groove and the oil return hole (705) of the iron core assembly (7) is provided on the oil separator seat (23).

6. A high-voltage permanent magnet direct-drive stirring motor according to any one of claims 2 to 5, characterized in that: The port is divided into an oil inlet terminal (706) and an oil return hole (705); the oil inlet terminal (706) is connected to the oil cooler (11) via an oil inlet pipeline (21); the oil return hole (705) is connected to the oil inlet end of the micro oil pump (12) via an oil discharge pipeline (22); and the oil outlet end of the micro oil pump (12) is connected to the oil cooler (11) to form a circulation.

7. A high-voltage permanent magnet direct-drive stirring motor according to claim 6, characterized in that: The cover (2) is provided with a filter plate (10), one side of the oil cooler (11) is in contact with the filter plate (10), a partition plate (13) is provided inside the casing (1), the partition plate (13) separates the cold oil area of ​​the oil cooler (11) from the drive area of ​​the stator (7) and the rotor (8), and the output shaft (3) is fixed with a linkage shaft (16) extending to the cold oil area, the outer side of the linkage shaft (16) is installed with a centrifugal blade (14), and the casing (1) is provided with an air outlet hole (20) located outside the centrifugal blade (14).

8. A high-voltage permanent magnet direct-drive stirring motor according to claim 7, characterized in that: The outer sides of the output shaft (3) and the linkage rotating shaft (16) are respectively connected to corresponding carriers via outer bearings (18) and are provided with labyrinth seals.

9. A high-voltage permanent magnet direct-drive stirring motor according to claim 1, characterized in that: The connection point between the rotor (8) and the output shaft (3) is connected via an inclined guide plate (17), and the inclined guide plate (17) drives the airflow to circulate during the rotation process.

10. A high-voltage permanent magnet direct-drive stirring motor according to claim 1, characterized in that: The oil cooler (11) is provided with an oil port (19) for exhausting air and changing oil, and the oil port (19) is sealed by a bolt.

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