Stator ventilation slot wedge structure

Abstract

The utility model discloses a stator ventilation slot wedge structure, and relates to the technical field of generator heat radiation, in particular to the stator ventilation slot wedge structure, which comprises a stator iron core and a ventilation slot wedge, the stator iron core is provided with teeth and slots, stator coils are arranged in the slots, and the ventilation slot wedge is arranged at a slot opening of the stator iron core and is used for tightly pressing the stator coils; an air channel is arranged on the connecting surface of the ventilating slot wedge and the stator coil; the air channel comprises an axial air channel and a tangential air channel. The heat dissipation device has the advantages that the heat dissipation efficiency is remarkably improved, the air flow is optimized, the ventilation loss is reduced, heat dissipation is uniform, local overheating is prevented, adaptability is high, and economic benefits are improved.

Description

Technical Field

[0001] This utility model relates to the field of generator heat dissipation technology, specifically to a stator ventilation slot wedge structure. Background Technology

[0002] As a core component of power supply, the reliability and efficiency of generators directly impact the stability and economy of the power system. During generator operation, the stator coils generate a significant amount of heat due to electromagnetic induction and current flow. If this heat cannot be dissipated effectively and promptly, the stator coil temperature will rise, potentially accelerating the aging of insulation materials, affecting generator performance and lifespan, and even leading to generator failure. Therefore, improving the heat dissipation efficiency of the stator coils is a crucial research direction in generator technology.

[0003] Existing stator slot wedges are usually made of solid insulating material, and their main function is to press and fix the stator coils to ensure that the coils do not loosen or shift during motor operation.

[0004] However, this solid-structure slot wedge has the following drawbacks:

[0005] 1. Limited heat dissipation capacity: Solid slotted wedges are not designed with ventilation channels and cannot provide an effective air circulation path.

[0006] 2. High air resistance: Because the solid slot wedges block part of the airflow, the airflow generates greater resistance when passing through the stator slot opening, which increases the energy consumption of the ventilation system.

[0007] 3. Risk of localized overheating: Solid slot wedges cannot guarantee uniform heat dissipation in all parts of the stator coil, especially under high load or long-term operation conditions, which can easily lead to localized overheating and affect the overall performance of the generator.

[0008] To address the aforementioned issues, this application proposes a stator ventilation slot wedge with a ventilation structure. By incorporating a rationally designed air duct on the slot wedge, the heat dissipation efficiency of the stator coil is significantly improved, while ventilation losses are reduced. The stator ventilation slot wedge structure of this application can effectively guide airflow and increase the contact area between the stator coil and the air, thereby achieving a more efficient heat dissipation effect. Utility Model Content

[0009] The present invention aims to overcome the shortcomings of the prior art and provide a stator ventilation slot wedge structure.

[0010] The technical solution adopted in this utility model is as follows:

[0011] A stator ventilation slot wedge structure includes: a stator core and a ventilation slot wedge. The stator core is provided with teeth and slots, and a stator coil is provided in the slot. The ventilation slot wedge is provided at the slot opening of the stator core for pressing the stator coil.

[0012] The ventilation slot wedge is connected to the stator coil with an air duct; the air duct includes an axial air duct and a tangential air duct.

[0013] Furthermore, at least one axial air duct is provided along the stator axis.

[0014] Furthermore, the tangential air duct is set to intersect the axial air duct perpendicularly.

[0015] Furthermore, the tangential duct depth is greater than the axial duct depth.

[0016] Furthermore, the tangential air duct section is set as an arc-shaped air guide surface according to the rotor rotation direction.

[0017] Furthermore, the two ends of the arc-shaped air guide surface are set at different heights, with a smooth arc transition.

[0018] Furthermore, the tangential air ducts include multiple ducts, which are evenly spaced and arranged in the ventilation slot wedges.

[0019] Furthermore, the stator core slot is provided with a sliding groove, and the ventilation slot wedge is slidably disposed in the stator core slot through the sliding groove.

[0020] In summary, the stator ventilation slot wedge structure of this application, through innovative design, effectively improves the heat dissipation efficiency of the stator coil in the prior art, and has the following beneficial effects:

[0021] 1. Significantly Improved Heat Dissipation Efficiency: The airflow design on the ventilation slot wedge, including axial and tangential airflow channels, significantly increases the contact area between the stator coil and the air, promoting heat transfer and dissipation. Compared with traditional solid slot wedges, the heat dissipation capacity is significantly improved, effectively reducing the temperature of the stator coil and extending the service life of the generator.

[0022] 2. Optimized airflow and reduced ventilation losses: The layout and design of the air ducts have been carefully optimized. The perpendicular intersection of the axial and tangential air ducts helps to form a smooth airflow channel and reduce airflow resistance. The depth of the tangential air duct is greater than that of the axial air duct, and its cross-section is designed as an arc-shaped air guide surface according to the rotor rotation direction, further smoothing and guiding the airflow, reducing airflow impact and turbulence, thereby reducing ventilation losses and improving generator efficiency.

[0023] 3. Uniform heat dissipation to prevent localized overheating: Multiple tangential air ducts are evenly spaced within the ventilation slot wedges to ensure uniform heat dissipation across all parts of the stator coils, avoiding localized overheating caused by uneven heat dissipation. This uniform heat dissipation design helps improve the overall performance and reliability of the generator.

[0024] 4. Easy to install and maintain: The sliding grooves in the stator core slots allow the ventilation slot wedges to be slidably installed.

[0025] 5. Enhanced insulation performance: The material selection and structural design of the ventilation slot wedge fully consider insulation performance, ensuring that the electrical safety of the generator is not affected while improving heat dissipation efficiency.

[0026] 6. High adaptability: The stator ventilation slot wedge structure of this application can be customized according to the heat dissipation requirements of different generators, and has strong adaptability.

[0027] 7. Improved economic efficiency: By improving heat dissipation efficiency and reducing ventilation losses, the stator ventilation slot wedge structure of this application helps to improve the overall efficiency and reliability of the generator, reduce maintenance costs, and thus bring significant economic benefits. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the ventilation slot wedge of this utility model;

[0030] Figure 3 This is a top view of the ventilation slot wedge of this utility model;

[0031] Figure 4 This is a cross-sectional view of the ventilation slot wedge of this utility model.

[0032] Marked in the image:

[0033] 1 - Ventilation slot wedge, 2 - Stator core, 3 - Stator coil, 4 - Axial air duct, 5 - Tangential air duct. Detailed Implementation

[0034] The present invention will now be described in detail with reference to the accompanying drawings.

[0035] 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 only used to explain this utility model and are not intended to limit this utility model.

[0036] Example 1

[0037] In this embodiment, as Figure 1 , 2 As shown, a stator ventilation slot wedge structure includes: a stator core 2 and a ventilation slot wedge 1. The stator core 2 is provided with teeth and slots, and a stator coil 3 is provided in the slot. The ventilation slot wedge 1 is provided at the slot opening of the stator core 2 for pressing the stator coil 3.

[0038] The ventilation slot wedge 1 and the stator coil 3 are connected by an air duct; the air duct includes an axial air duct 4 and a tangential air duct 5.

[0039] Specifically, the ventilation slot wedge 1 is designed to be elongated and strip-shaped to press the stator coil arranged in the slot. An air duct is set on the side that is close to the stator coil 3 to drive the air to flow in the air duct when the rotor rotates, so as to remove heat.

[0040] The contact surface between the ventilation slot wedge 1 and the stator coil 3 is provided with air ducts, including axial air duct 4 and tangential air duct 5. This design significantly increases the contact area between the stator coil 3 and the air, and improves the heat dissipation efficiency.

[0041] Furthermore, at least one axial air duct 4 is provided along the stator axis.

[0042] In this embodiment, the axial air duct 4 is configured as a single line that runs through the ventilation slot wedge 1 from beginning to end.

[0043] Increasing the number of axial air ducts 4 helps to enhance ventilation and further improve heat dissipation. Multiple axial air ducts 4 can guide airflow more effectively, reduce airflow resistance, and reduce ventilation losses.

[0044] Furthermore, the tangential air duct 5 is set perpendicularly to the axial air duct 4.

[0045] The tangential air duct 5 is set perpendicularly to the axial air duct 4. The design of the tangential air duct 5 helps to form a smoother airflow channel and reduce airflow impact and turbulence.

[0046] This design reduces ventilation losses and improves the overall efficiency of the generator.

[0047] Furthermore, the depth of the tangential air duct 5 is greater than the depth of the axial air duct 4.

[0048] The tangential air duct 5 is deeper than the axial air duct 4. The deeper tangential air duct 5 can provide a larger ventilation space and enhance the heat dissipation effect.

[0049] The depth difference helps optimize airflow distribution and ensures uniform heat dissipation in all parts of the stator coil 3.

[0050] Furthermore, the tangential air duct 5 section is set as an arc-shaped air guide surface according to the rotor rotation direction.

[0051] The tangential air duct section 5 is designed with an arc-shaped air guide surface according to the rotor rotation direction. The arc-shaped air guide surface can smoothly guide the airflow and reduce airflow resistance and turbulence.

[0052] This design further reduces ventilation losses and improves generator efficiency.

[0053] Furthermore, the two ends of the arc-shaped air guide surface are set at different heights, with a smooth arc transition.

[0054] The curved air guide surface has different heights at both ends, transitioning smoothly with a rounded arc. This varying height better adapts to airflow characteristics and optimizes airflow distribution. Specifically, the inlet end is deeper to maximize air intake, which is then guided through the curved duct to the narrower end, increasing air velocity and improving heat dissipation efficiency.

[0055] The smooth curves reduce airflow impact and lower ventilation losses.

[0056] Furthermore, the tangential air duct 5 includes multiple ducts, which are evenly spaced and arranged in the ventilation slot wedge 1.

[0057] The tangential air ducts 5 include multiple ducts, which are evenly spaced within the ventilation slot wedges 1. Multiple tangential air ducts 5 help ensure uniform heat dissipation of all parts of the stator coil 3 and avoid localized overheating.

[0058] The uniform heat dissipation design improves the overall performance and reliability of the generator.

[0059] Furthermore, the stator core 2 slot is provided with a sliding groove, and the ventilation slot wedge 1 is slidably disposed in the stator core 2 slot through the sliding groove.

[0060] The stator core 2 slot is provided with a sliding groove, through which the ventilation slot wedge 1 is slidably mounted. The sliding groove design facilitates the installation and removal of the ventilation slot wedge 1, improving installation and maintenance efficiency.

[0061] This design reduces maintenance costs and facilitates routine maintenance and replacement.

[0062] Example 2

[0063] Based on Embodiment 1, a method for installing a stator ventilation slot wedge structure is provided, including the following steps:

[0064] S1: Clean the stator core slot 2 thoroughly to ensure no debris remains;

[0065] S2: Check whether the groove of ventilation slot wedge 1 is intact and undamaged, and ensure that it can slide smoothly;

[0066] S3: Align the ventilation slot wedge 1 with the slot opening of the stator core 2, so that the groove of the ventilation slot wedge 1 is aligned with the groove of the slot opening of the stator core 2.

[0067] S4: Gently push the ventilation slot wedge 1 to slide it along the slide until it is fully inserted into the stator core 2 slot;

[0068] S5: Check whether the ventilation slot wedge 1 is installed in place and ensures that it is in close contact with the stator coil 3;

[0069] S6: Secure the installed ventilation slot wedge 1 to prevent it from loosening or falling off.

[0070] The process includes cleaning the stator core slot 2, inspecting the ventilation slot wedge 1, aligning and sliding the installation, checking that the installation is in place, and fixing it in place.

[0071] This installation method ensures that the ventilation slot wedge 1 can be correctly installed in place, guaranteeing installation quality and safety.

[0072] Furthermore, in step S3, carefully observe the position of the air duct to ensure that the direction of the air duct is consistent with the design requirements; after installation, conduct a ventilation test to check whether the air duct is unobstructed and free from blockages; conduct an insulation test on the installed ventilation slot wedge 1 to ensure that the insulation performance meets the requirements.

[0073] During installation, carefully observe the duct location to ensure the duct direction aligns with design requirements. The air inlet should have a large opening to ensure sufficient airflow. After installation, conduct ventilation and insulation tests to ensure the duct is unobstructed and the insulation performance meets requirements.

[0074] These steps further ensure the quality of installation and the electrical safety of the generator.

[0075] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. A stator ventilation slot wedge structure, characterized in that: include: Stator core (2) and ventilation slot wedge (1), wherein the stator core (2) is provided with teeth and slots, and stator coil (3) is provided in the slots, and the ventilation slot wedge (1) is provided at the slot opening of the stator core (2) for pressing the stator coil (3); The ventilation slot wedge (1) is provided with an air duct at the contact surface with the stator coil (3); the air duct includes an axial air duct (4) and a tangential air duct (5).

2. The stator ventilation slot wedge structure according to claim 1, characterized in that: The axial air duct (4) is provided along the stator axis at least once.

3. The stator ventilation slot wedge structure according to claim 1, characterized in that: The tangential air duct (5) is arranged perpendicularly to the axial air duct (4).

4. A stator ventilation slot wedge structure according to claim 1, characterized in that: The depth of the tangential air duct (5) is greater than the depth of the axial air duct (4).

5. A stator ventilation slot wedge structure according to claim 1, characterized in that: The cross section of the tangential air duct (5) is set as an arc-shaped air guide surface according to the rotor rotation direction.

6. A stator ventilation slot wedge structure according to claim 5, characterized in that: The two ends of the arc-shaped air guide surface are set at different heights, with a smooth arc transitioning between them.

7. A stator ventilation slot wedge structure according to claim 1, characterized in that: The tangential air duct (5) includes multiple ducts, which are evenly spaced and arranged in the ventilation slot wedge (1).

8. A stator ventilation slot wedge structure according to claim 1, characterized in that: The stator core (2) slot is provided with a sliding groove, and the ventilation slot wedge (1) is slidably disposed in the stator core (2) slot through the sliding groove.

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