A variable cross-section motor ventilation duct structure

Abstract

This utility model discloses a variable cross-section motor ventilation duct structure, comprising: a stator core composed of several stacked stator laminations; multiple variable cross-section ventilation ducts running through the stator core in a direction parallel to its axis, the ducts being evenly distributed circumferentially around the stator core, with their cross-sectional shapes varying along the airflow direction; and flow-guiding support components corresponding to the variable cross-section ventilation ducts, each component including a support rod installed in the duct and a spiral guide vane fixed to the support rod. The spiral guide vane guides the airflow to form a spiral flow path within the variable cross-section ventilation duct. This utility model solves the problems of uneven motor heat dissipation and excessive wind resistance by using a variable cross-section ventilation duct in conjunction with a spiral guide vane to force spiral airflow, thereby improving motor efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of motor ventilation and heat dissipation technology, and in particular relates to a variable cross-section motor ventilation duct structure. Background Technology

[0002] Traditional motor ventilation structures often employ straight ventilation ducts with uniform cross-sections or simple baffles for airflow guidance. Straight ventilation ducts have short airflow paths and low heat exchange efficiency, easily leading to localized overheating of the iron core. While baffles can extend the airflow path, they increase wind resistance and easily generate eddy noise. In existing technologies, heat dissipation structures often neglect the axial heat conduction path, relying solely on airflow for heat dissipation. This results in insufficient heat dissipation under high-speed or high-load conditions, hindering the improvement of motor efficiency. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a variable cross-section motor ventilation duct structure. By using a variable cross-section air duct in conjunction with a spiral guide vane to force spiral airflow, the problem of uneven heat dissipation and excessive wind resistance of the motor is solved, thereby improving the motor efficiency.

[0004] Technical solution: To achieve the above objectives, this utility model provides a variable cross-section motor ventilation duct structure, comprising:

[0005] A stator core consisting of several stator laminations stacked together;

[0006] Multiple variable cross-section ventilation channels are arranged through the stator core along a direction parallel to the axis of the stator core. The variable cross-section ventilation channels are evenly distributed in a circumferential array along the stator core, and their cross-sectional shape changes along the airflow direction.

[0007] A flow guide support assembly is provided corresponding to the variable cross-section ventilation duct. The flow guide support assembly includes a strut provided in the variable cross-section ventilation duct and a spiral flow guide plate fixed on the strut.

[0008] The spiral guide vane is used to guide the airflow to form a spiral flow path within the variable cross-section ventilation duct.

[0009] Furthermore, the variable cross-section ventilation duct includes, in sequence along the airflow direction, a straight inlet section, an enlarged central diffuser section, and a gradually narrowing outlet section.

[0010] Furthermore, the spiral guide vane covers the inlet section and the central diffuser section.

[0011] Furthermore, the surface of the spiral guide vane is coated with a hydrophobic coating.

[0012] Furthermore, the support rod is a hollow tube filled with a thermally conductive ceramic core, and both ends of the thermally conductive ceramic core extend into the outside of the stator core through variable cross-section ventilation channels.

[0013] Furthermore, the flow guide support assembly also includes end support plates fixedly connected to both ends of the support rod. The end support plates are welded and fixed to the axial end face of the stator core so that the support rod and the variable cross-section ventilation duct are coaxially supported.

[0014] The two ends of the thermally conductive ceramic core are positioned to pass through corresponding end support plates.

[0015] Furthermore, the end support plate has a windproof hole in the area directly opposite the variable cross-section ventilation duct.

[0016] Furthermore, the end support plate has a protrusion on the surface facing the stator core, and a groove adapted to the protrusion is provided on the stator lamination corresponding to the axial end of the stator core. The protrusion is inserted into the groove to position the end support plate, and the end support plate is welded and fixed to the stator lamination.

[0017] Beneficial effects: This utility model uses a variable cross-section ventilation duct combined with a spiral guide vane to force spiral airflow. The inlet section reduces turbulence loss, the diffuser section increases the heat exchange area, and the outlet section accelerates exhaust, significantly reducing wind resistance. The hydrophobic coating prevents dust accumulation and ensures the long-term stability of the spiral airflow path. The thermally conductive ceramic core runs through the inside and outside of the iron core, establishing an axial auxiliary heat dissipation path, which, together with the spiral airflow, improves the overall heat dissipation efficiency. The welding of the end support plate and the protruding groove design ensure the coaxial positioning of the guide components, avoiding assembly deviations that interfere with airflow. It solves the problems of uneven heat dissipation and excessive wind resistance in motors, improving motor efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the stator core partially cut in the radial direction.

[0019] Figure 2 A schematic diagram of the cross-section of one of the variable cross-section ventilation ducts;

[0020] Figure 3 This is a schematic diagram of the stator core in the axial direction. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, a variable cross-section motor ventilation duct structure includes: a stator core 1 formed by stacking a plurality of stator laminations 11; and a plurality of variable cross-section ventilation ducts 2 extending through the stator core 1 in a direction parallel to the axis of the stator core 1. The variable cross-section ventilation ducts 2 are evenly distributed in a circumferential array along the stator core 1, and their cross-sectional shape varies along the airflow direction. This increases the heat dissipation area, balances the circumferential temperature distribution of the stator core 1, and avoids local overheating.

[0023] A flow-guiding support assembly 3 is provided corresponding to the variable cross-section ventilation duct 2. The flow-guiding support assembly 3 includes a support rod 31 disposed on the variable cross-section ventilation duct 2 and a spiral guide vane 32 fixed on the support rod 31. The spiral guide vane 32 is used to guide the airflow to form a spiral flow path within the variable cross-section ventilation duct 2. The support rod 31 provides structural support, and the spiral guide vane 32 guides the airflow to rotate and form a spiral path, thereby extending the residence time of the airflow within the variable cross-section ventilation duct 2, enhancing heat exchange efficiency, strengthening the contact heat exchange between the airflow and the wall of the variable cross-section ventilation duct 2, and improving the uniformity of heat dissipation.

[0024] like Figure 2 As shown, the variable cross-section ventilation duct 2 includes, in sequence along the airflow direction, a straight inlet section 2a, an enlarged central diffuser section 2b, and a tapering outlet section 2c. The straight inlet section 2a reduces airflow inlet turbulence and lowers wind resistance loss; the central diffuser section 2b reduces airflow velocity and increases the airflow-to-duct wall area, improving heat absorption efficiency; the tapering outlet section 2c accelerates exhaust, prevents heat accumulation at the outlet, and prevents heat retention.

[0025] The spiral guide vane 32 covers the inlet section 2a and the middle diffuser section 2b. It guides the airflow to form a spiral motion in the initial stage, making full use of the space in the diffuser section to extend the spiral path and maximize the heat exchange time.

[0026] It is worth noting that the change in the cross-section of the expanded central diffuser section 2b reduces the flow velocity and creates low-resistance rotation conditions for the spiral guide vane 32, allowing the low-speed airflow to rotate fully in the expanded space, absorbing more heat, and ultimately achieving the goal of reducing wind resistance instead of increasing it, and significantly improving heat dissipation efficiency.

[0027] The surface of the spiral guide vane 32 is coated with a hydrophobic coating. When the motor is running, environmental dust carried by the airflow is difficult to adhere to the surface of the spiral guide vane 32 due to its low surface energy and is stripped off by the airflow, thereby avoiding dust accumulation and ensuring the long-term stability of the spiral airflow path.

[0028] The support rod 31 is a hollow tube filled with a thermally conductive ceramic core 30. Both ends of the thermally conductive ceramic core 30 extend from the variable cross-section ventilation channel 2 to the outside of the stator core 1. Heat inside the variable cross-section ventilation channel 2 is conducted to the outside of the core through the thermally conductive ceramic core 30, assisting in airflow heat dissipation.

[0029] The flow guide support assembly 3 also includes end support plates 33 fixedly connected to both ends of the support rod 31. The end support plates 33 are welded and fixed to the axial end face of the stator core 1 so that the support rod 31 and the variable cross-section ventilation duct 2 are coaxially supported, thus avoiding the eccentricity of the spiral guide vane 32 and the resulting airflow turbulence.

[0030] The two ends of the thermally conductive ceramic core 30 are disposed through the corresponding end support plates 33.

[0031] In order to reduce the obstruction of airflow by the end support plate 33, a windproof hole 330 is provided on the end support plate 33 in the area facing the variable cross-section ventilation duct 2.

[0032] like Figure 2 As shown, the end support plate 33 has a protrusion 331 on its surface facing the stator core 1. A groove 110, matching the protrusion 331, is provided on the stator lamination 11 at the axial end of the stator core 1. The protrusion 331 is inserted into the groove 110 to position the end support plate 33. The end support plate 33 is then welded to the stator lamination 11. The cooperation between the protrusion 331 and the groove 110 enables rapid and precise positioning of the end support plate 33, ensuring that the axis of the support rod 31 coincides with the center line of the variable cross-section ventilation duct 2 after welding, thus avoiding assembly errors that could affect airflow guidance.

[0033] This invention utilizes a variable cross-section ventilation duct combined with spiral guide vanes to force spiral airflow. The inlet section reduces turbulence losses, the diffuser section increases the heat exchange area, and the outlet section accelerates exhaust, significantly reducing wind resistance. A hydrophobic coating prevents dust accumulation and ensures the long-term stability of the spiral airflow path. A thermally conductive ceramic core runs through the inside and outside of the iron core, establishing an axial auxiliary heat dissipation path that, together with the spiral airflow, improves overall heat dissipation efficiency. Welded end support plates and raised groove designs ensure coaxial positioning of the guide components, preventing assembly deviations from interfering with airflow. This invention solves the problems of uneven motor heat dissipation and excessive wind resistance, improving motor efficiency.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A variable cross-section motor ventilation duct structure, characterized in that: include: A stator core (1) is composed of several stator laminations (11) stacked together. Multiple variable cross-section ventilation channels (2) are arranged through the stator core (1) in a direction parallel to the axis of the stator core (1). The variable cross-section ventilation channels (2) are evenly distributed in a circumferential array along the stator core (1), and their cross-sectional shape changes along the airflow direction. A flow guide support assembly (3) is provided corresponding to the variable cross-section ventilation duct (2). The flow guide support assembly (3) includes a support rod (31) provided in the variable cross-section ventilation duct (2) and a spiral flow guide plate (32) fixed on the support rod (31). The spiral guide vane (32) is used to guide the airflow to form a spiral flow path within the variable cross-section ventilation duct (2).

2. The variable cross-section motor ventilation duct structure according to claim 1, characterized in that: The variable cross-section ventilation duct (2) includes, in sequence along the airflow direction, a straight inlet section (2a), an enlarged central diffuser section (2b), and a gradually narrowing outlet section (2c).

3. The variable cross-section motor ventilation duct structure according to claim 2, characterized in that: The spiral guide vane (32) covers the inlet section (2a) and the middle diffuser section (2b).

4. A variable cross-section motor ventilation duct structure according to claim 1, 2, or 3, characterized in that: The surface of the spiral guide vane (32) is coated with a hydrophobic coating.

5. The variable cross-section motor ventilation duct structure according to claim 1, characterized in that: The support rod (31) is a hollow tube filled with a thermally conductive ceramic core (30). Both ends of the thermally conductive ceramic core (30) extend from the variable cross-section ventilation channel (2) to the outside of the stator core (1).

6. The variable cross-section motor ventilation duct structure according to claim 5, characterized in that: The flow guide support assembly (3) also includes end support plates (33) fixedly connected to both ends of the support rod (31). The end support plates (33) are welded and fixed to the axial end face of the stator core (1) so that the support rod (31) and the variable cross-section ventilation duct (2) are coaxially supported. The two ends of the thermally conductive ceramic core (30) are arranged through the corresponding end support plates (33).

7. A variable cross-section motor ventilation duct structure according to claim 6, characterized in that: The end support plate (33) has a windproof hole (330) in the area directly opposite the variable cross-section ventilation duct (2).

8. A variable cross-section motor ventilation duct structure according to claim 6, characterized in that: The end support plate (33) has a protrusion (331) on the plate surface facing the stator core (1). The stator lamination (11) at the axial end of the stator core (1) has a groove (110) that matches the protrusion (331). The protrusion (331) is inserted into the groove (110) to position the end support plate (33). The end support plate (33) is welded and fixed to the stator lamination (11).

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