High-speed axial magnetic flux motor for stator and rotor coupling type exhaust gas circulating pump

Abstract

The utility model relates to the technical field of fuel vehicle motors and industrial energy-saving transformation, in particular to a high-speed axial magnetic flux motor for a stator and rotor coupling type exhaust gas circulating pump. According to the technical scheme, the motor comprises a stator combination module and a composite rotor, the stator combination module is composed of a U-shaped sealing machine shell, a winding disc type stator, a potting winding and a stator installation machine shell cover, the cross section of the U-shaped sealing machine shell is of a U-shaped structure with an opening facing the right side, the outer side of the U-shaped sealing machine shell is cylindrical, and the outer side of the U-shaped sealing machine shell is provided with a groove. The composite rotor is composed of a rotor sealing shell, a main body rotating shaft, a back iron structure, a magnetic steel structure and a rotor protection plate. The main body rotating shaft penetrates out of the center position of the rotor sealing shell. The motor has the advantages that the stator shells are in sealing fit, and the stator matching structure adopts the U-shaped sealing casing, so that the heat dissipation capability can be improved, and the sealing performance can be improved; therefore, the motor is prevented from rusting, the service life of the motor is prolonged, the protection level is higher, and bearings are not required.

Description

Technical Field

[0001] The utility model relates to the technical fields of fuel vehicle motors and industrial energy-saving transformation, and in particular to a high-speed axial flux motor for a stator-rotor coupled exhaust gas circulation pump. Background Art

[0002] Most of the existing exhaust gas circulation pump motors are radial permanent magnet motors; the radial motor has a complex stator and rotor isolation structure, which will result in poor motor performance and short motor life, and cannot completely prevent exhaust gas corrosion.

[0003] On the other hand, most inner rotor radial hydrogen pump motors have not changed the structure of traditional motors. For example, the Chinese patent publication number CN220358983U, named "A new type of exhaust gas circulation pump motor drive system", uses a potting process to improve the air tightness of the motor, but there may still be leakage problems. For example, the patent number CN117424398A is named, a shielded induction motor for aviation pumps with internal and external water circulation, and it still uses a radial inner rotor structure. For example, the patent number CN220254216U is named, a composite rotor structure used in a shielded motor, the stator and rotor cores use a closed structure, the motor structure is relatively complex, and the performance stability of the motor during use cannot be guaranteed. Utility Model Content

[0004] The purpose of the utility model is to provide a high-speed axial flux motor for a stator-rotor coupled exhaust gas circulation pump, wherein the stator and the housing are sealed, and the stator matching structure adopts a U-shaped sealed casing to improve the heat dissipation capacity and the sealing performance; thereby preventing the motor from rusting and extending the service life of the motor, with a higher protection level, no bearings need to be installed, and the exhaust gas can be completely isolated. The U-shaped sealed casing can reduce eddy current losses, increase the creepage distance of the motor, and improve the heat resistance level of the motor, with good plasticity and high mechanical strength. The rotor protection plate and the back iron are completely sealed by welding technology, which can effectively fix the magnetic steel and prevent the magnetic steel from falling off, reducing other assembly processes and having high structural strength. The product separates the moving part from the stationary part, effectively preventing the exhaust gas from entering and thus causing damage to the motor.

[0005] The technical solution of the utility model is as follows:

[0006] A high-speed axial flux motor for a stator-rotor coupled exhaust gas circulation pump, characterized in that it includes a stator assembly module and a composite rotor, wherein the stator assembly module is composed of a U-shaped sealed casing, a wound disc stator, a potted winding and a stator mounting casing cover, the cross-section of the U-shaped sealed casing is a U-shaped structure opening to the right, the outer side of the U-shaped sealed casing is cylindrical, the composite rotor is composed of a rotor sealed shell, a main rotating shaft, a back iron structure, a magnetic steel structure and a rotor protection plate, the main rotating shaft passes through the center position of the rotor sealed shell, the interior of the rotor sealed shell is a cylindrical matching groove, the main rotating shaft is located inside the rotor sealed shell and is connected to the back iron structure by welding, a matching placement groove for placing the magnetic steel structure is provided on the right side of the back iron structure, the rotor protection plate is located on the outer side of the magnetic steel structure, and the diameter of the outer cylindrical surface of the stator mounting casing cover is the same as the diameter of the outer cylindrical surface of the rotor sealed shell.

[0007] Furthermore, the U-shaped sealing casing and the stator mounting casing cover are sealed at the mating positions through a sealing combination groove and a sealing combination boss.

[0008] Furthermore, the U-shaped sealing casing and the stator mounting casing cover are sealed at the matching positions using a labyrinth sealing structure.

[0009] Furthermore, a positioning and matching groove is provided at the matching position between the stator mounting housing cover and the winding disc stator.

[0010] Furthermore, the rotor sealing shell and the main body rotating shaft are connected together by welding.

[0011] Beneficial effects of the utility model:

[0012] The stator shell of the utility model is sealed and matched, and the stator matching structure adopts a U-shaped sealed casing to improve the heat dissipation capacity and the sealing performance; thereby preventing the motor from rusting and extending the service life of the motor. The protection level is higher, and the exhaust gas can be completely isolated without installing bearings. The U-shaped sealed casing can reduce eddy current loss, increase the creepage distance of the motor, and improve the heat resistance level of the motor. The plasticity is good and the mechanical strength is high. The rotor protection plate and the back iron are completely sealed by welding technology, which can effectively fix the magnetic steel and prevent the magnetic steel from falling off, reducing other assembly processes and having high structural strength. The product separates the moving part and the stationary part, effectively preventing the exhaust gas from entering and causing damage to the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the central cross-section structure of the utility model;

[0014] In the figure: 1. stator mounting housing cover, 2. rotor sealing housing, 3. winding disc stator, 4. U-shaped sealing housing, 5. rotor protection plate, 6. magnetic steel structure, 7. back iron structure, 8. main rotating shaft. DETAILED DESCRIPTION

[0015] like Figure 1 As shown, a high-speed axial flux motor for a stator-rotor coupled exhaust gas circulation pump includes a stator assembly module and a composite rotor. The stator assembly module is composed of a U-shaped sealed housing 4, a wound disc stator 3, a potting winding and a stator mounting housing cover 1. The cross section of the U-shaped sealed housing 4 is a U-shaped structure with an opening to the right. The outer side of the U-shaped sealed housing 4 is cylindrical. The U-shaped sealed housing structure has the advantages of improving heat dissipation capacity and sealing performance; thereby preventing the motor from rusting and extending the service life of the motor. The labyrinth seal structure can further increase the protection level. The composite rotor is composed of a rotor sealing shell 2, a main rotating shaft 8, a back iron structure 7, a magnetic steel structure 6 and a rotor protection plate 5. The main rotating shaft 8 passes through the center of the rotor sealing shell 2. The interior of the rotor sealing shell 2 is a cylindrical matching groove. The U-shaped sealed housing can be made of epoxy glass fiber material to reduce eddy current loss, increase the creepage distance of the motor, and improve the heat resistance level of the motor. The main rotating shaft 8 is located inside the rotor sealing shell 2 and is connected to the back iron structure 7 by welding. A matching placement groove for placing the magnetic steel structure 6 is provided on the right side of the back iron structure 7. The rotor protection plate 5 is located on the outside of the magnetic steel structure 6. The diameter of the outer cylindrical surface of the stator mounting housing cover 1 is the same as the diameter of the outer cylindrical surface of the rotor sealing shell 2, ensuring better flatness of the outer side of the overall structure, higher safety during operation, and smaller overall occupied volume. The stator housing is sealed, and the stator matching structure adopts a U-shaped sealed casing to improve the heat dissipation capacity and the sealing performance; thereby preventing the motor from rusting and extending the service life of the motor. The protection level is higher, and the bearing does not need to be installed, and the exhaust gas can be completely isolated. The U-shaped sealed casing can reduce eddy current loss, increase the creepage distance of the motor, and improve the heat resistance level of the motor. It has good plasticity and high mechanical strength. The rotor protection plate and the back iron are completely sealed by welding process, which can effectively fix the magnetic steel and prevent the magnetic steel from falling off, reducing other assembly processes and having high structural strength. This product separates the moving part and the stationary part, effectively preventing the exhaust gas from entering and causing damage to the motor.

[0016] Preferably, the U-shaped sealing casing 4 and the stator mounting casing cover 1 are sealed at the mating positions through a sealing combination groove and a sealing combination boss, and the sealing operation is relatively convenient and the sealing is relatively reliable.

[0017] Preferably, the U-shaped sealing casing 4 and the stator mounting casing cover 1 are sealed at the mating position using a labyrinth sealing structure, which can achieve optimal sealing performance at the mating position, a higher overall sealing protection level, and more reliable overall safety during later use.

[0018] Preferably, a placement positioning matching groove is provided at the matching position between the stator mounting housing cover 1 and the winding disc stator 3, so that the operation during matching placement is more convenient, the placement accuracy of the matching position is higher, and the efficiency during assembly is also higher.

[0019] Preferably, the rotor sealing shell 2 is connected to the main rotating shaft 8 by welding, which ensures the structural strength of the connection position, is convenient for later maintenance, and has stronger durability during use. Together with other parts of the rotor, a closed composite rotor structure is formed. The rotating shaft part can be directly installed on the external moving part, thereby realizing contactless magnetic circuit coupling drive.

[0020] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements or substitutions can be made without departing from the principles of the present invention. These improvements or substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A high-speed axial flux motor for a stator-rotor coupled exhaust gas circulation pump, characterized in that: The invention comprises a stator assembly module and a composite rotor, wherein the stator assembly module is composed of a U-shaped sealed housing (4), a wound disc stator (3), a potted winding and a stator mounting housing cover (1); the cross section of the U-shaped sealed housing (4) is a U-shaped structure with an opening to the right; the outer side of the U-shaped sealed housing (4) is cylindrical; the composite rotor is composed of a rotor sealed housing (2), a main rotating shaft (8), a back iron structure (7), a magnetic steel structure (6) and a rotor protection plate (5); the main rotating shaft (8) is connected from the rotor sealed housing (2) to the rotor protective plate (5); ), the interior of the rotor sealing shell (2) is a cylindrical matching groove, the main body rotating shaft (8) is located inside the rotor sealing shell (2) and is connected to the back iron structure (7) by welding, the right side of the back iron structure (7) is provided with a matching placement groove for placing the magnetic steel structure (6), the rotor protection plate (5) is located outside the magnetic steel structure (6), and the diameter of the outer cylindrical surface of the stator mounting housing cover (1) is the same as the diameter of the outer cylindrical surface of the rotor sealing shell (2).

2. The high-speed axial flux motor for a stator-rotor coupled exhaust gas circulation pump according to claim 1, characterized in that: The U-shaped sealing housing (4) and the stator mounting housing cover (1) are sealed at the matching positions through a sealing combination groove and a sealing combination boss.

3. The high-speed axial flux motor for a stator-rotor coupled exhaust gas circulation pump according to claim 1, characterized in that: The mating positions of the U-shaped sealing casing (4) and the stator mounting casing cover (1) are sealed by adopting a labyrinth sealing structure.

4. The high-speed axial flux motor for a stator-rotor coupled exhaust gas circulation pump according to claim 1, characterized in that: A positioning matching groove is provided at the matching position between the stator mounting housing cover (1) and the winding disc type stator (3).

5. The high-speed axial flux motor for a stator-rotor coupled exhaust gas circulation pump according to claim 1, characterized in that: The rotor sealing shell (2) and the main body rotating shaft (8) are connected together by welding.

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