Stator core ventilation channel structure

Abstract

The utility model provides a kind of stator core air passage structure, including stator main body, stator main body middle is equipped with and axial parallel air passage, air passage is inserted with the air pipe for guiding airflow and cooling motor, air pipe is fixed with the air deflector for controlling and layering cooling air direction and welding in, the middle of stator main body is equipped with and the same number of heat dissipation fin of air passage, the inside wall of stator main body is equipped with cooling groove, air passage, it is machined from two circular through holes, and two circular through hole portion overlaps, air pipe and air passage are mutually matched, air deflector, it is set along motor axial part, air deflector is located air pipe symmetry line position, the middle of air deflector is equipped with the air deflector groove that cooling wind is guided, the utility model can set cooling groove in the position that stator main body is easy to generate heat, to dissipate the heat that local accumulation, ensure the uniform distribution of motor internal heat.

Description

Technical Field

[0001] This utility model relates to the field of stator heat dissipation technology, and in particular to a stator core ventilation duct structure. Background Technology

[0002] The core components inside an electric motor are the stator and rotor. When a motor operates, it generates heat. Existing motors primarily transfer this heat to the motor housing via the stator, where it is then dissipated by heat sink fins. However, due to differences in motor housing structures, heat cannot be dissipated quickly and evenly when it reaches the housing, leading to heat accumulation in localized areas and causing degradation of the permanent magnet motor's magnets. Summary of the Invention

[0003] The purpose of this invention is to provide a stator core ventilation duct structure that ventilates the motor rotor by setting up ventilation ducts and ventilation pipes, thereby preventing local heat accumulation in the motor rotor and solving the problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a stator core ventilation duct structure, including a stator body, a ventilation duct parallel to the axial direction is provided in the middle of the stator body, a ventilation pipe for guiding airflow and cooling the motor is inserted in the ventilation duct, an air guide plate for controlling and stratifying the cooling airflow is welded and fixed in the ventilation pipe, a number of heat dissipation fins the same as the number of ventilation ducts are provided in the middle of the stator body, and a cooling groove is provided on the inner side wall of the stator body;

[0005] The ventilation duct is formed by two circular through holes, and the two circular through holes partially overlap, with the ventilation pipe and ventilation duct matching each other;

[0006] The air guide plate is arranged along the axial part of the motor and is located at the symmetrical line of the ventilation pipe. The air guide plate has an air guide groove in the middle to guide the cooling air. A blocking block to block the cooling air is welded on the side of the air guide plate near the motor rotor.

[0007] Preferably, the cooling tank has an annular structure, the ventilation duct and the cooling tank are interconnected, and heat dissipation fins for increasing the heat dissipation performance inside the stator body are welded and fixed on the inner wall of the ventilation duct. The heat dissipation fins have an arc-shaped positioning groove on the side near the ventilation duct.

[0008] Preferably, the positioning groove and the ventilation pipe are snapped together, and the side of the heat dissipation fin facing the axis of the stator body is an arc-shaped surface, and the arc-shaped surface is provided with at least four heat dissipation grooves.

[0009] Preferably, the outer side wall of the ventilation duct is provided with two symmetrical slots along its axial direction, and the inner side wall of the ventilation duct is provided with two protrusions at corresponding positions. The protrusions and the slots match each other to form a snap-fit ​​structure to ensure that the ventilation duct is securely installed in the ventilation duct.

[0010] Preferably, the air guide channel has an arc-shaped structure, and the side of the blocking block near the motor shaft has an arc-shaped structure, and this side is smoothly connected to the inner wall of the air guide channel.

[0011] Preferably, the blocking block has at least three sets of blocking grooves on the side near the motor shaft, the front half of the blocking groove is an arc-shaped groove, and the rear half of the blocking groove is a circular hole structure.

[0012] Preferably, the outer side wall of the stator body is provided with a motor housing, and the inner side wall of the stator body is uniformly distributed with stator windings, which are welded and fixed to the inner side wall of the stator body.

[0013] The beneficial effects of this invention are as follows: Ventilation channels are installed inside the rotor body to guide cooling air through key parts of the rotor body, directly removing heat accumulated in these areas. This effectively increases the motor's heat dissipation capacity, preventing heat buildup inside the motor and resulting in a more uniform temperature distribution within the motor. This significantly extends the lifespan of the permanent magnet motor's magnets.

[0014] Ventilation ducts guide cooling air through key parts of the rotor, directly removing heat and significantly improving heat dissipation efficiency. For example, in an air-cooled steam turbine generator, the rotor ventilation duct consists of auxiliary slot ventilation channels, slot wedge air outlets, etc. Its complex geometry diversifies the flow pattern of the cooling medium, effectively enhancing heat dissipation capacity. Insufficient heat dissipation can lead to localized heat accumulation, accelerating insulation aging and even causing performance degradation of permanent magnet motor magnets. Ventilation ducts can avoid such problems. Attached Figure Description

[0015] Figure 1 This is a three-dimensional connection diagram of the rotor body provided by this utility model.

[0016] Figure 2 This is a schematic cross-sectional view of the rotor body provided by this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the ventilation duct provided by this utility model.

[0018] Figure 4 This is a three-dimensional connection diagram of the air guide plate and the blocking block provided by this utility model.

[0019] Figure 5 This is a schematic diagram of the three-dimensional structure of the heat sink fins.

[0020] In the diagram: 1. Motor housing, 2. Stator body, 3. Stator winding, 4. Ventilation duct, 5. Ventilation pipe, 6. Cooling slot, 7. Heat dissipation fins, 8. Slot, 9. Air guide plate, 10. Air guide groove, 11. Blocking block, 12. Blocking groove, 13. Positioning groove, 14. Heat dissipation groove. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] See Figure 1-5 The present invention provides a stator core ventilation duct structure, comprising a stator body 2, a motor housing 1 on the outer side wall of the stator body 2, stator windings 3 evenly distributed on the inner side wall of the stator body 2, the stator windings 3 welded and fixed to the inner side wall of the stator body 2, a ventilation duct 4 parallel to the axial direction in the middle of the stator body 2, a ventilation pipe 5 inserted in the ventilation duct 4 for guiding airflow and cooling the motor, a guide plate 9 welded and fixed in the ventilation pipe 5 for controlling and stratifying the cooling airflow, heat dissipation fins 7 in the middle of the stator body 2 in the same number as the ventilation duct 4, and a cooling groove 6 on the inner side wall of the stator body 2.

[0023] The ventilation duct 4 is formed by two circular through holes, which partially overlap. The ventilation pipe 5 and the ventilation duct 4 are matched with each other. The positioning groove 13 is engaged with the ventilation pipe 5. The heat dissipation fins 7 are arc-shaped on the side facing the axis of the stator body 2, and the arc-shaped surface is provided with at least four heat dissipation grooves 14. The outer side wall of the ventilation pipe 5 is symmetrically provided with two slots 8 along its axial direction. The inner side wall of the ventilation duct 4 is provided with two protrusions at corresponding positions. The protrusions and the slots 8 are matched with each other to form a snap-fit ​​structure to ensure that the ventilation pipe 5 is firmly installed in the ventilation duct 4. This snap-fit ​​structure can make the ventilation pipe 5 firmly connected to the stator body 2 and can withstand the radial force generated by the vibration of the ventilation pipe 5 during motor operation without loosening.

[0024] The air guide plate 9 is arranged along the axial direction of the motor and is located on the symmetrical line of the ventilation pipe 5. The air guide plate 9 has an air guide groove 10 in the middle to guide the cooling air. A blocking block 11 is welded to the side of the air guide plate 9 near the motor rotor to block the cooling air. The air guide groove 10 has an arc-shaped structure, and the blocking block 11 has an arc-shaped structure on the side near the motor shaft. This side is smoothly connected to the inner wall of the air guide groove 10. The air guide groove 10 can guide the cooling air, so that the cooling air flows along the air guide groove 10 to the lower end of the air guide plate 9, which facilitates the exhaust of the cooling air. At the same time, the cooling air can form a stable airflow vortex when passing through the air guide groove 10, thereby increasing the cooling effect of this part and enhancing the cooling effect of specific parts inside the motor. The air guide groove is set in the heat accumulation part inside the rotor body 2 to avoid heat accumulation in local positions.

[0025] The blocking block 11 has at least three sets of blocking grooves 12 on the side near the motor shaft. The front half of the blocking groove 12 is an arc-shaped groove, and the rear half of the blocking groove 12 is a round hole structure. The blocking groove 12 can disperse the wind flowing towards the blocking block 11, thereby forming an airflow vortex. The flow direction and heat dissipation requirements of the cooling wind are optimized, and the cooling wind can be effectively blocked and dispersed.

[0026] The cooling tank 6 has a ring structure. The ventilation duct 4 and the cooling tank 6 are interconnected. The inner wall of the ventilation duct 4 is welded and fixed with heat dissipation fins 7 to increase the heat dissipation performance inside the stator body 2. The heat dissipation fins 7 have an arc-shaped positioning groove 13 on the side near the ventilation pipe 5. The heat dissipation fins 7 can increase the local heat conduction capacity, thereby quickly conducting heat to the ventilation pipe 5 and ensuring heat dissipation efficiency.

[0027] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements 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 stator core ventilation duct structure, comprising a stator body (2), characterized in that: The stator body (2) has a ventilation channel (4) parallel to the axial direction in the middle. A ventilation pipe (5) for guiding airflow and cooling the motor is inserted into the ventilation channel (4). A guide plate (9) for controlling and stratifying the cooling airflow is welded and fixed inside the ventilation pipe (5). The stator body (2) has the same number of heat dissipation fins (7) as the ventilation channel (4) in the middle. A cooling groove (6) is provided on the inner side wall of the stator body (2). The ventilation duct (4) is made of two circular through holes, and the two circular through holes partially overlap. The ventilation pipe (5) and the ventilation duct (4) are matched with each other. The air guide plate (9) is arranged along the axial part of the motor. The air guide plate (9) is located at the symmetrical position of the ventilation pipe (5). The air guide plate (9) has an air guide groove (10) in the middle for guiding the cooling air. The air guide plate (9) has a blocking block (11) welded on the side of the air guide plate (9) near the motor rotor to block the cooling air.

2. The stator core ventilation duct structure according to claim 1, characterized in that: The cooling tank (6) is an annular structure. The ventilation duct (4) and the cooling tank (6) are interconnected. The inner wall of the ventilation duct (4) is welded and fixed with heat dissipation fins (7) for increasing the heat dissipation performance inside the stator body (2). The heat dissipation fins (7) have an arc-shaped positioning groove (13) on the side near the ventilation pipe (5).

3. The stator core ventilation duct structure according to claim 2, characterized in that: The positioning groove (13) and the ventilation pipe (5) are engaged. The heat dissipation fins (7) are arc-shaped on the side facing the axis of the stator body (2), and the arc-shaped surface is provided with at least four heat dissipation grooves (14).

4. The stator core ventilation duct structure according to claim 1, characterized in that: The outer side wall of the ventilation pipe (5) is symmetrically provided with two slots (8) along its axial direction, and the inner side wall of the ventilation channel (4) is provided with two protrusions at corresponding positions. The protrusions and the slots (8) match each other and form a snap-fit ​​structure to ensure that the ventilation pipe (5) is securely installed in the ventilation channel (4).

5. A stator core ventilation duct structure according to claim 1, characterized in that: The air guide groove (10) has an arc-shaped structure, and the side of the blocking block (11) near the motor shaft has an arc-shaped structure, and this side is smoothly connected to the inner wall of the air guide groove (10).

6. The stator core ventilation duct structure according to claim 1, characterized in that: The blocking block (11) has at least three sets of blocking grooves (12) on the side near the motor shaft. The front half of the blocking groove (12) is an arc-shaped groove, and the rear half of the blocking groove (12) is a round hole structure.

7. A stator core ventilation duct structure according to claim 1, characterized in that: The outer side wall of the stator body (2) is provided with a motor housing (1), and the inner side wall of the stator body (2) is uniformly distributed with stator windings (3), which are welded and fixed to the inner side wall of the stator body (2).

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