Generator stator end part adjustable wind shield structure and use method thereof

Abstract

The invention discloses a generator stator end adjustable wind shield structure and a use method thereof, and relates to the technical field of hydro-generator heat dissipation, in particular to a generator stator end adjustable wind shield structure and a use method thereof, and the generator stator end adjustable wind shield structure comprises a fixed wind shield, an adjusting main plate, a middle adjusting plate and an adjusting pore plate. Two connecting plates are arranged among the fixed wind shield, the confluence copper ring and the end coil, and the two connecting plates are respectively arranged on the radial inner side and the radial outer side of the confluence copper ring; the adjusting main plate is arranged on the inner side connecting plate in a sliding mode, the adjusting hole plate is arranged on the outer side connecting plate, the middle adjusting plate is arranged between the two connecting plates in a sliding mode, and the middle adjusting plate, the adjusting main plate and the adjusting hole plate form a horn-shaped air channel. The device has the advantages of remarkably improving the heat dissipation efficiency, reducing the ventilation loss, being flexible to adjust, high in adaptability, energy-saving, environment-friendly and high in universality, and improving the operation stability and the service life of the generator.

Description

Technical Field

[0001] The invention relates to the technical field of heat dissipation of a hydro-generator, and in particular to an adjustable windshield structure at the end of a generator stator and a use method thereof. Background Art

[0002] In a hydro-turbine generator, the stator end coil is one of the key heat-generating components. Its heat dissipation effect directly affects the axial temperature distribution of the stator, and thus affects the performance and reliability of the entire generator. At present, most motor stator end coils are directly exposed in the end air duct. Due to the large space in this area, the cooling wind speed of the end coil is low, the heat dissipation conditions are poor, and the temperature is high. This uneven temperature distribution not only accelerates the aging of the coil insulation material, but also may cause thermal deformation, affecting the service life and safety of the motor.

[0003] In order to improve the heat dissipation conditions of the stator end coils, some motor designs add fixed straight wind shields. Although these fixed wind shields can guide the airflow to a certain extent and increase the cooling effect of the coils, they have the following shortcomings:

[0004] 1. Large ventilation loss: The design of fixed wind shield is difficult to take into account both heat dissipation efficiency and ventilation loss. While improving the heat dissipation effect, it often increases ventilation resistance, resulting in increased ventilation loss.

[0005] 2. Unable to adjust: The position and angle of the fixed windshield are fixed, and cannot be adjusted in real time according to the actual operation of the generator and temperature changes, and the adaptability is poor. In some working conditions, insufficient heat dissipation or overcooling may occur.

[0006] Therefore, a new type of adjustable windshield structure is needed, which can flexibly adjust the position and spacing of the windshield according to the actual operation of the generator and the temperature change of the stator end confluence copper ring, so as to improve the heat dissipation efficiency, reduce ventilation losses, and ensure the stable operation of the generator. The adjustable windshield structure at the end of the generator stator proposed in this patent application is designed to solve the above problems. By setting a slidable adjustment main board and an intermediate adjustment plate, the structure can flexibly adjust the wind flow area of ​​the air duct, effectively increase the amount of cooling air flowing through the stator end coil, improve the heat dissipation efficiency, and reduce the temperature of the heating components. At the same time, the windshield is designed as a trumpet-shaped air duct, and the air flow direction is optimized, which reduces the generation of vortices in the end coil flow channel, makes the air flow in the flow channel smoother, and significantly reduces ventilation losses. Summary of the invention

[0007] The present invention aims to overcome the above-mentioned shortcomings of the prior art and provides an adjustable windshield structure at the end of a generator stator and a method of using the same.

[0008] The technical solution adopted by the present invention is as follows:

[0009] An adjustable wind deflector structure for the end part of a generator stator, comprising: a fixed wind deflector, an adjusting main board, an intermediate adjusting board, an adjusting orifice plate, and a busbar copper ring arranged at one end of the generator stator. The fixed wind deflector is sleeved outside the busbar copper ring and the end part coil of the generator stator. There are two connecting plates arranged between the fixed wind deflector and the busbar copper ring, and the two connecting plates are respectively arranged on the inner and outer sides of the busbar copper ring in the radial direction;

[0010] The adjusting main board is slidably arranged on the inner connecting plate, the adjusting orifice plate is arranged on the outer connecting plate, and the intermediate adjusting board is slidably arranged between the two connecting plates, forming a horn-shaped air duct together with the adjusting main board and the adjusting orifice plate.

[0011] Furthermore, the connecting plate is provided with a plurality of strip-shaped opening grooves, and the opening grooves are arranged along the axial direction of the motor stator.

[0012] Furthermore, bolt holes for connecting the opening grooves are arranged at corresponding positions on the adjusting main board and the intermediate adjusting board.

[0013] Furthermore, heat dissipation through holes are evenly distributed on the surface of the adjusting orifice plate.

[0014] Furthermore, the adjusting orifice plate comprises a fixed orifice plate and a sliding orifice plate slidably connected to the fixed orifice plate.

[0015] Furthermore, the fixed orifice plate is provided with a plurality of sliding grooves arranged along the axial direction of the motor stator, and bolt holes are arranged at corresponding positions of the sliding orifice plate for the sliding grooves.

[0016] Furthermore, the cross section of the adjusting main board is set as a "factory" shape.

[0017] Furthermore, the cross section of the intermediate adjusting board is set as a smooth arc shape.

[0018] Furthermore, an adjustable wind deflector structure for the end part of a generator stator comprises the following steps:

[0019] S1: Monitor the temperature of the end part coil and the busbar copper ring of the generator stator in real time;

[0020] S2: When the temperature of the end part coil and the busbar copper ring is too high, loosen the connection bolt nuts between the adjusting main board and the connecting plate, adjust the distance between the adjusting main board and the end part coil and the busbar copper ring, and then tighten the nuts for fixation;

[0021] S3: Loosen the connection bolt nuts between the intermediate adjusting board and the connecting plate, adjust the distance between the intermediate adjusting board and the busbar copper ring, and then tighten the nuts for fixation;

[0022] S4: After the above adjustments, improve the air passing area of the air duct, and detect whether the temperature of the end part coil and the busbar copper ring is stable;

[0023] S5: If the temperature of the end coil and the bus copper ring continues to be high, repeat the above steps until the temperature of the end coil and the bus copper ring is stable.

[0024] Furthermore, after step S3, the fixing bolts of the sliding orifice plate and the fixed orifice plate are loosened, and the height of the sliding orifice plate is adjusted and then the nuts are tightened to fix it.

[0025] In summary, the adjustable windshield structure at the end of the generator stator has the following significant beneficial effects:

[0026] 1. Significantly improve heat dissipation efficiency: By setting fixed and adjustable wind shields, a trumpet-shaped or streamlined air duct is formed to effectively guide the cooling air flow, increase the amount of air flowing through the stator end coils, improve heat dissipation efficiency, and reduce the temperature of the heating components. This design ensures that the cooling air flows through the heating components more directly and evenly, avoiding the formation of airflow dead zones and temperature gradients.

[0027] 2. Reduce ventilation loss: The optimized air duct design and the guiding effect of the wind shield significantly reduce the generation of vortices in the end coil flow channel, making the air flow in the flow channel smoother, thereby effectively reducing ventilation loss. This not only improves the overall efficiency of the generator, but also helps to reduce operating costs.

[0028] 3. Flexible adjustment and strong adaptability: This structure can adjust the position and spacing of the windshield in real time according to the actual operation of the generator and the temperature changes of the stator end and the converging copper ring to achieve precise heat dissipation control. This flexibility enables the generator to maintain the best heat dissipation state under various working conditions, improving the stability and reliability of operation.

[0029] 4. Easy to install and maintain: The adjustable windshield at the end of the generator stator has a simple structure design, is easy to install, and is easy to disassemble and maintain. During the adjustment process, you only need to loosen the bolts and nuts, move the adjustment plate to the appropriate position and then re-fix it, which greatly reduces maintenance costs and time.

[0030] 5. Improve the running stability and service life of the generator: Through effective heat dissipation, the temperature of the stator end is reduced, the aging and thermal deformation risks of the insulation material are reduced, and the running stability and service life of the generator are improved. In addition, the downtime caused by excessive temperature is reduced, and the availability and economic benefits of the generator are improved.

[0031] 6. Energy saving and environmental protection: This design improves heat dissipation efficiency while reducing ventilation loss, which is in line with the development trend of energy saving and environmental protection. It has positive significance for environmental protection by reducing energy consumption and carbon emissions.

[0032] 7. Strong versatility: The adjustable windshield structure at the end of the generator stator can be widely used in various types of hydro-turbine generators, and has strong versatility and promotion value.

[0033] In summary, the adjustable windshield structure at the stator end of the generator effectively solves the problems of low heat dissipation efficiency, large ventilation loss, and inconvenient adjustment of the existing motor stator end coil through innovative design. It has significant technical advantages and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the structure of the present invention;

[0035] Figure 2 It is a cross-sectional view of the present invention.

[0036] Markings in the figure:

[0037] 1-fixed wind shield, 2-adjustment main board, 3-middle adjustment plate, 4-adjustment hole plate, 5-collecting copper ring, 6-connection plate, 7-opening groove, 8-heat dissipation through hole, 9-fixed hole plate, 10-sliding hole plate, 11-end coil.

[0038] Specific Examples

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] Embodiment 1

[0042] In this embodiment, if Figure 1 , 2 As shown, an adjustable windshield structure at the end of a generator stator comprises: a fixed windshield 1, an adjustment main plate 2, an intermediate adjustment plate 3, an adjustment hole plate 4 and a bus copper ring 5 arranged at one end of the generator stator, the fixed windshield 1 is sleeved on the outside of the bus copper ring 5 and the end coil 11 of the generator stator, two connecting plates 6 are arranged between the fixed windshield 1 and the bus copper ring 5, and the two connecting plates 6 are respectively arranged on the radial inner and outer sides of the bus copper ring 5;

[0043] The adjusting main board 2 is slidably arranged on the inner connecting plate 6, the adjusting hole plate 4 is arranged on the outer connecting plate 6, and the middle adjusting plate 3 is slidably arranged between the two connecting plates 6 to form a trumpet-shaped air duct with the adjusting main board 2 and the adjusting hole plate 4.

[0044] Specifically, two connecting plates 6 are arranged between the fixed windshield 1 and the end coil 11 and the converging copper ring 5. The two connecting plates 6 are respectively arranged on the radial inner and outer sides of the converging copper ring 5. This arrangement method is conducive to the arrangement of the subsequent ventilation duct. The heat dissipation plate ducts arranged on both sides are conducive to the formation of the duct. The fixed windshield 1 is arranged on the outer side of the copper ring. The two connecting plates 6 are arranged as annular sheets and are arranged on the inner side of the fixed windshield 1. The connecting plate 6 arranged on the inner side is slightly longer than the connecting plate 6 on the outer side, which is conducive to the formation of a trumpet-shaped duct.

[0045] The regulating main board 2 is set to be annular and installed on the inner connecting plate 6. The cross section is set to be factory-shaped, and its corners are set to be smooth circular transitions; the regulating orifice plate 4 is set on the outer connecting plate 6 and is set to be an annular sheet.

[0046] This structural design forms a trumpet-shaped air duct to effectively guide the cooling air flow, increase the amount of air flowing through the stator end coil 11, improve the heat dissipation efficiency, and reduce the temperature of the heat-generating components. At the same time, the setting of the windshield reduces the generation of vortices in the flow channel and reduces ventilation losses.

[0047] Furthermore, the connecting plate 6 is provided with a plurality of strip-shaped opening slots 7, and the opening slots 7 are arranged along the axial direction of the motor. The adjusting main plate 2 and the intermediate adjusting plate 3 are provided with bolt holes for connecting the opening slots 7 at corresponding positions.

[0048] Specifically, the open grooves 7 are arranged in a circular array on the connecting plate 6, and are set as 4 in the present embodiment, and are radially arranged along the converging copper ring 5, and are fixed by bolts and nuts. When adjustment is needed, the 4 nuts are loosened at the same time, and the adjustment main board 2 or the adjustment middle plate is adjusted to change the shape of the air duct.

[0049] The design of the strip opening slot 7 and the bolt hole facilitates the sliding and fixing of the main plate 2 and the intermediate adjustment plate 3, making the adjustment process more convenient and quick. At the same time, this design ensures that the adjustment plate can maintain good sealing performance in different positions to avoid airflow leakage.

[0050] Furthermore, ventilation holes are arranged on the surface of the regulating orifice plate 4 .

[0051] The design of the ventilation holes can effectively adjust the air volume distribution of the air duct and increase the wind speed, reduce the ineffective air volume and improve the air utilization rate.

[0052] Furthermore, the adjusting orifice plate 4 includes a fixed orifice plate 9 and a sliding orifice plate 10 slidably connected to the fixed orifice plate 9 .

[0053] This design makes the adjustment of the adjustment orifice plate 4 more flexible, and the height of the sliding orifice plate 10 can be adjusted according to actual needs, thereby further optimizing the air duct structure and improving the heat dissipation effect.

[0054] Further, the fixed orifice plate 9 is provided with a plurality of chutes arranged along the axial direction of the motor, and the sliding orifice plate 10 is provided with bolt holes corresponding to the positions of the chutes.

[0055] Specifically, the number of chutes is set to 4, and bolt holes are provided at corresponding positions on the sliding orifice plate 10. Fixing is carried out through bolts and nuts. When it is necessary to adjust the sliding orifice plate 10, 4 bolts are loosened simultaneously to adjust the sliding orifice plate 10, and the nuts are tightened for fixing after adjustment.

[0056] The design of the chutes and bolt holes makes the adjustment of the sliding orifice plate 10 more convenient and rapid, ensuring the stability during the adjustment process.

[0057] Further, the cross-section of the adjustment main board 2 is set in a "Γ" shape.

[0058] The cross-section design in a "Γ" shape increases the strength and stability of the adjustment main board 2. At the same time, it optimizes the air flow path and improves the heat dissipation efficiency.

[0059] Further, the cross-section of the middle adjustment board 3 is set as a smooth arc.

[0060] The smooth arc cross-section design reduces the air flow resistance, optimizes the air flow distribution in the air duct, and reduces the ventilation loss.

[0061] Embodiment 2

[0062] Further, a structure of an adjustable wind baffle at the end of a generator stator includes the following steps:

[0063] S1: Monitor the temperatures of the coils 11 at the end of the generator stator and the busbar copper ring 5 in real time;

[0064] S2: When the temperatures of the end coils 11 and the copper ring are too high, loosen the connecting bolt nuts of the adjustment main board 2 and the connecting board 6, adjust the distance between the adjustment main board 2, the end coils 11 and the copper ring, and then tighten the nuts for fixing;

[0065] S3: Loosen the connecting bolt nuts of the middle adjustment board 3 and the connecting board 6, adjust the distance between the middle adjustment board 3 and the copper ring, and then tighten the nuts for fixing;

[0066] S4: After the adjustment through the above steps, improve the air passing area of the air duct, and detect whether the temperatures of the end coils 11 and the copper ring are stable;

[0067] S5: If the temperatures of the end coils 11 and the copper ring remain on the high side, repeat the above steps until the temperatures of the end coils 11 and the busbar copper ring 5 are stable.

[0068] This usage method makes the adjustment process of the adjustable wind baffle structure at the end of the generator stator more convenient and rapid, can be adjusted in real time according to the actual operating conditions, and improves the heat dissipation efficiency and the operating stability.

[0069] Furthermore, after step S3, the fixing bolts of the sliding orifice plate 10 and the fixed orifice plate 9 are loosened, and the height of the sliding orifice plate 10 is adjusted and then the nuts are tightened to fix it.

[0070] By adjusting the height of the sliding orifice plate 10, the air duct structure is further optimized and the heat dissipation effect is improved. This design makes the adjustment process more flexible and adaptable.

[0071] Specifically, the steps are:

[0072] Step 1: Temperature Monitoring

[0073] The temperature sensors installed on the generator stator end coil 11 and the bus copper ring 5 are used to monitor the temperature of the end coil 11 and the bus copper ring 5 in real time. The temperature data is transmitted to the control system through the sensor for real-time display and analysis.

[0074] Step 2: Initial Status Check

[0075] Confirm that all components of the adjustable windshield structure at the end of the generator stator (fixed windshield 1, adjustment main board 2, middle adjustment plate 3, adjustment hole plate 4, etc.) are in the initial position and all connecting bolts and nuts are tightened.

[0076] Step 3: Adjusting the temperature when it is too high

[0077] 1. Adjust the motherboard 2:

[0078] When the control system displays that the temperature of the end coil 11 and the bus copper ring 5 exceeds a preset threshold, the operator first loosens the connecting bolts and nuts between the adjustment main board 2 and the inner connecting plate 6 .

[0079] Manually slide and adjust the main board 2 to move it closer to or farther from the end or the copper ring to change the air flow area of ​​the air duct. The adjustment distance should be determined based on temperature changes and experience. The smaller the air duct, the faster the flow rate and the better the heat dissipation capacity.

[0080] After the adjustment is completed, retighten the connecting bolts and nuts.

[0081] 2. Adjust the middle adjustment plate 3:

[0082] Loosen the connecting bolts and nuts between the middle adjustment plate 3 and the connecting plate 6.

[0083] Slide the middle adjustment plate 3 to a proper position to further optimize the air duct structure.

[0084] After adjustment, tighten the connecting bolts and nuts.

[0085] 3. Adjust the sliding orifice plate 10 (optional):

[0086] If the structural design includes a sliding orifice plate 10 , the height of the sliding orifice plate 10 is adjusted after loosening the fixing bolts of the sliding orifice plate 10 and the fixed orifice plate 9 .

[0087] After adjustment is completed, tighten the fixing bolts.

[0088] Step 4: Effect evaluation

[0089] After the adjustment is completed, continue to monitor the temperature changes of the end coil 11 and the bus copper ring 5 to evaluate the adjustment effect. If the temperature drops to a safe range and remains stable, the adjustment is successful.

[0090] If the temperature is still too high, repeat step 3 and continue to adjust the wind deflector position until the temperature stabilizes within an acceptable range.

[0091] Step 5: Record and maintain

[0092] Record the time of each adjustment, the position of the adjustment plate, temperature changes and other information for subsequent analysis and maintenance reference.

[0093] Check the tightness of the wind deflector structure regularly to ensure that each component is in the correct position and is not loose or damaged.

[0094] Step 6: Emergency Response

[0095] In case of sudden overtemperature, emergency measures should be taken immediately, such as increasing cooling air flow or reducing generator load, and quickly adjusting the wind shield.

[0096] If the adjustment is ineffective, stop the machine immediately for inspection and restart it after troubleshooting.

[0097] Through the above-mentioned usage method, the adjustable windshield structure at the end of the generator stator can be flexibly adjusted according to actual operating conditions and temperature changes, effectively improving the heat dissipation efficiency, reducing the temperature of the heat-generating components, and ensuring the stable operation of the generator.

[0098] The above description is only a preferred embodiment of the invention and is not intended to limit the invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention should be included in the protection scope of the invention.

Claims

1. An adjustable windshield structure at the end of a generator stator, characterized in that: Including: A fixed wind deflector (1), an adjustment main board (2), an intermediate adjustment board (3), an adjustment orifice plate (4), and a busbar copper ring (5) arranged at one end of the generator stator. The fixed wind deflector (1) is sleeved outside the busbar copper ring (5) and the end coil (11) of the generator stator. Two connecting plates (6) are arranged between the fixed wind deflector (1) and the busbar copper ring (5), and the two connecting plates (6) are respectively arranged on the inner and outer sides of the busbar copper ring (5) in the radial direction. The adjustment main board (2) is slidably arranged on the inner connecting plate (6), the adjustment orifice plate (4) is arranged on the outer connecting plate (6), and the intermediate adjustment board (3) is slidably arranged between the two connecting plates (6) and forms a horn-shaped air duct with the adjustment main board (2) and the adjustment orifice plate (4).

2. According to the adjustable windshield structure at the end of the generator stator as described in claim 1, it is characterized by: The connecting plate (6) is provided with a plurality of strip-shaped opening grooves (7), and the opening grooves (7) are arranged along the axial direction of the motor stator.

3. According to the adjustable windshield structure at the end of the generator stator as claimed in claim 2, it is characterized by: The adjustment main board (2) and the intermediate adjustment board (3) are provided with bolt holes corresponding to the opening grooves (7) for connection.

4. According to the adjustable windshield structure at the end of the generator stator as claimed in claim 1, it is characterized by: The surface of the adjustment orifice plate (4) is provided with uniformly distributed heat dissipation through holes (8).

5. The adjustable windshield structure at the end of a generator stator according to claim 1, characterized in that: The adjustment orifice plate (4) includes a fixed orifice plate (9) and a sliding orifice plate (10) slidably connected to the fixed orifice plate (9).

6. The adjustable windshield structure at the end of the generator stator according to claim 5, characterized in that: The fixed orifice plate (9) is provided with a plurality of sliding grooves arranged along the axial direction of the motor stator, and the sliding orifice plate (10) is provided with bolt holes corresponding to the positions of the sliding grooves.

7. The adjustable windshield structure at the end of a generator stator according to claim 1, characterized in that: The cross-section of the adjustment main board (2) is set in the shape of "厂".

8. The adjustable windshield structure at the end of a generator stator according to claim 1, characterized in that: The cross-section of the intermediate adjustment board (3) is set as a smooth arc.

9. A method for using an adjustable windshield structure at the end of a generator stator, applied to the adjustable windshield structure at the end of a generator stator as claimed in any one of claims 1 to 8, characterized in that: Including the following steps: S1: Monitor the temperatures of the end coil (11) of the generator stator and the busbar copper ring (5) in real time. S2: When the temperatures of the end coil (11) and the busbar copper ring (5) are too high, loosen the connection bolt nuts between the adjustment main board (2) and the connecting plate (6), adjust the distance between the adjustment main board (2), the end coil (11), and the busbar copper ring (5), and then tighten the nuts for fixation. S3: Loosen the connection bolt nuts between the intermediate adjustment board (3) and the connecting plate (6), adjust the distance between the intermediate adjustment board (3) and the busbar copper ring (5), and then tighten the nuts for fixation. S4: After the above adjustments, improve the air passing area of the air duct and detect whether the temperatures of the end coil (11) and the busbar copper ring (5) are stable. S5: If the temperatures of the end coil (11) and the busbar copper ring (5) continue to be on the high side, repeat the above steps until the temperature of the busbar copper ring (5) is stable.

10. The method for using the adjustable windshield structure at the end of a generator stator according to claim 9, characterized in that: After step S3, loosen the fixing bolts between the sliding orifice plate (10) and the fixed orifice plate (9), adjust the height of the sliding orifice plate (10), and then tighten the nuts for fixation.

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