Adjustable wind shield structure at end part of generator stator

Abstract

The utility model discloses an adjustable wind shield structure at the end part of a generator stator, and relates to the technical field of heat dissipation of hydro-generators, in particular to the adjustable wind shield structure at the end part of the generator stator, which 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 utility model relates to water turbine generator heat dissipation technical field, concretely relates to a generator stator end adjustable baffle structure. BACKGROUND

[0002] In the water turbine generator, the stator end coil is one of the key heating components, and its heat dissipation effect directly affects the axial temperature distribution of the stator, and further affects the performance and reliability of the entire generator. At present, most of the stator end coils of the motor are directly exposed in the end air duct, and due to the large space in this area, the cooling air speed of the end coil is small, the heat dissipation condition is 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 condition of the stator end coil, some fixed straight baffles are added in the design of some motors. These fixed baffles can guide the airflow to a certain extent and increase the cooling effect of the coil, but they have the following disadvantages:

[0004] 1. Large ventilation loss: the design of the fixed baffle can not balance the heat dissipation efficiency and ventilation loss, and often increases the ventilation resistance while improving the heat dissipation effect, resulting in increased ventilation loss.

[0005] 2. Cannot be adjusted: the position and angle of the fixed baffle are fixed, and cannot be adjusted in real time according to the actual operation of the generator and the temperature change, and the adaptability is poor. In some working conditions, there may be insufficient heat dissipation or excessive cooling.

[0006] Therefore, a new adjustable baffle structure is needed, which can flexibly adjust the position and distance of the baffle according to the actual operation of the generator and the temperature change of the stator end copper ring, so as to improve the heat dissipation efficiency, reduce the ventilation loss, and ensure the stable operation of the generator. The generator stator end adjustable baffle structure proposed in this patent application is designed to solve the above problems. The structure can flexibly adjust the air passage area of the air duct by setting the slidable adjusting main plate and the intermediate adjusting plate, 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 component. At the same time, the baffle is designed as a horn-shaped air duct, and the air flow direction is optimized, which reduces the generation of vortex in the end coil flow channel, makes the air flow in the flow channel more smooth, and significantly reduces the ventilation loss. CONTENT OF THE UTILITY MODEL

[0007] The utility model aims at overcoming the above-mentioned prior art defects, and provides a generator stator end adjustable baffle structure.

[0008] The technical scheme adopted by the utility model is as follows:

[0009] A generator stator end adjustable baffle structure, comprising: a fixed baffle, an adjustable main plate, an intermediate adjusting plate, an adjustable hole plate and a copper ring arranged at one end of the generator stator, the fixed baffle is sleeved outside the copper ring and the end coil of the generator stator, two connecting plates are arranged between the fixed baffle and the copper ring, and the two connecting plates are respectively arranged on the inner and outer sides of the copper ring in the radial direction;

[0010] The adjustable main plate is slidably arranged on the inner connecting plate, the adjustable hole plate is arranged on the outer connecting plate, and the intermediate adjusting plate is slidably arranged between the two connecting plates to form a horn-shaped air duct with the adjustable main plate and the adjustable hole plate.

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

[0012] Further, the adjustable main plate and the intermediate adjusting plate are provided with bolt holes corresponding to the opening grooves.

[0013] Further, the surface of the adjustable hole plate is provided with uniformly distributed heat dissipation through holes.

[0014] Further, the adjustable hole plate comprises a fixed hole plate and a sliding hole plate slidably connected to the fixed hole plate.

[0015] Further, the fixed hole plate is provided with a plurality of sliding grooves arranged in the axial direction of the motor stator, and the sliding hole plate is provided with bolt holes corresponding to the sliding grooves.

[0016] Further, the cross section of the adjustable main plate is arranged in the shape of a "factory" character.

[0017] Further, the cross section of the intermediate adjusting plate is arranged in a smooth arc shape.

[0018] In summary, the generator stator end adjustable baffle structure has the following remarkable beneficial effects:

[0019] 1. Significantly improve the heat dissipation efficiency: by setting the fixed baffle and the adjustable baffle, a horn-shaped or streamlined air duct is formed, which effectively guides the cooling air flow and increases the amount of air flowing through the stator end coil, improves the heat dissipation efficiency, and reduces the temperature of the heating components. This design ensures that the cooling air flows more directly and uniformly through the heating components, avoiding the formation of dead air zones and temperature gradients.

[0020] 2. Reduce ventilation loss: The optimized air duct design and the flow guiding effect of the baffle significantly reduce the generation of vortexes in the end coil flow channel, making the air flow in the flow channel smoother, thereby effectively reducing the ventilation loss. This not only improves the overall efficiency of the generator, but also helps to reduce operating costs.

[0021] 3. Flexible adjustment and strong adaptability: The structure can adjust the position and spacing of the wind baffle in real time according to the actual operation of the generator and the temperature change of the stator end and the copper ring, realizing precise heat dissipation control. This flexibility enables the generator to maintain optimal heat dissipation state under various working conditions, improving the stability and reliability of operation.

[0022] 4. Easy to install and maintain: The adjustable wind baffle structure of the generator stator end is simple in design, easy to install, and easy to disassemble and maintain. During adjustment, only the bolts and nuts need to be loosened, and the adjustment plate is moved to the appropriate position and then fixed again, greatly reducing maintenance cost and time.

[0023] 5. Improve the stability and service life of the generator: By effectively dissipating heat, the temperature of the stator end is reduced, reducing the risk of aging and thermal deformation of the insulation material, improving the stability and service life of the generator. In addition, the downtime caused by excessive temperature is reduced, improving the availability and economic benefits of the generator.

[0024] 6. Energy saving and environmental protection: The design improves the heat dissipation efficiency while reducing the ventilation loss, in line with the development trend of energy saving and environmental protection. By reducing energy consumption and carbon emissions, it has a positive significance for environmental protection.

[0025] 7. Strong universality: The adjustable wind baffle structure of the generator stator end can be widely applied to various types of hydroelectric generators, with strong universality and promotional value.

[0026] In summary, the adjustable wind baffle structure of the generator stator end solves the problems of low heat dissipation efficiency, large ventilation loss, and inconvenient adjustment of existing motor stator end coils through innovative design, with significant technical advantages and wide application prospects. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of the utility model;

[0028] Figure 2 is a sectional view of the utility model.

[0029] Markings in the figure:

[0030] 1 - fixed wind baffle, 2 - adjustment main plate, 3 - intermediate adjustment plate, 4 - adjustment hole plate, 5 - copper ring, 6 - connecting plate, 7 - open slot, 8 - heat dissipation through hole, 9 - fixed hole plate, 10 - sliding hole plate, 11 - end coil. DETAILED DESCRIPTION

[0031] The utility model will be described in detail below in combination with the drawings.

[0032] In order to make the utility model purposes, technical solutions and advantages more clearly, the following will be further described in detail with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0033] Embodiment one

[0034] In this embodiment, as shown in Figure 1 、 2 A generator stator end adjustable baffle structure, comprising: a fixed baffle 1, an adjusting main plate 2, an intermediate adjusting plate 3, an adjusting hole plate 4 and a copper ring 5 arranged at one end of the generator stator, the fixed baffle 1 is sleeved outside the copper ring 5 and the end coil 11 of the generator stator, two connecting plates 6 are arranged between the fixed baffle 1 and the copper ring 5, and the two connecting plates 6 are respectively arranged on the inner and outer sides of the copper ring 5 in the radial direction.

[0035] The adjusting main plate 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 intermediate adjusting plate 3 is slidably arranged between the two connecting plates 6, and the adjusting main plate 2 and the adjusting hole plate 4 form a horn-shaped air duct.

[0036] Specifically, the fixed baffle 1 is arranged between the end coil 11 and the copper ring 5, and the two connecting plates 6 are arranged on the inner and outer sides of the copper ring 5 in the radial direction, which is beneficial to the subsequent arrangement of the air duct, and the two connecting plates 6 are arranged on the inner and outer sides of the copper ring 5 in the radial direction, which is beneficial to the subsequent arrangement of the air duct.

[0037] The adjusting main plate 2 is arranged in a ring shape and is mounted on the inner connecting plate 6, and the cross section is arranged in a factory shape, and the corner is arranged in a smooth circular transition; the adjusting hole plate 4 is arranged on the outer connecting plate 6 and is arranged in a ring-shaped sheet.

[0038] This structure design forms a horn-shaped air duct, effectively guides the flow of cooling air, increases the amount of air flowing through the end coil 11 of the stator, improves the heat dissipation efficiency, and reduces the temperature of the heating components. At the same time, the arrangement of the baffle reduces the generation of vortex in the flow channel, and reduces the ventilation loss.

[0039] Further, the connecting plate 6 is provided with a plurality of strip-shaped opening grooves 7, and the opening grooves 7 are arranged along the motor axial direction. The adjusting main plate 2 and the intermediate adjusting plate 3 are provided with bolt holes corresponding to the opening grooves 7.

[0040] Specifically, the open slots 7 are arranged in a circumferential array on the connecting plate 6. In this embodiment, there are 4 slots, which are arranged radially along the busbar copper ring 5 and are fixed by bolts and nuts. When adjustment is needed, loosen the 4 nuts simultaneously to adjust the adjustment main board 2 or the adjustment intermediate board, thereby changing the shape of the air duct.

[0041] The design of the strip-shaped open slots 7 and the bolt holes facilitates the sliding and fixing of the adjustment main board 2 and the intermediate adjustment board 3, making the adjustment process more convenient and fast. At the same time, this design ensures that the adjustment board can maintain good airtightness at different positions, avoiding air leakage.

[0042] Furthermore, ventilation holes are provided on the surface of the adjustment hole plate 4.

[0043] 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.

[0044] Furthermore, the adjustment hole plate 4 includes a fixed hole plate 9 and a sliding hole plate 10 that is slidably connected to the fixed hole plate 9.

[0045] This design makes the adjustment of the adjustment hole plate 4 more flexible, and can adjust the height of the sliding hole plate 10 according to actual needs, further optimizing the air duct structure and improving the heat dissipation effect.

[0046] Furthermore, the fixed hole plate 9 is provided with a plurality of chutes arranged along the axial direction of the motor, and the sliding hole plate 10 is provided with bolt holes corresponding to the positions of the chutes.

[0047] Specifically, there are 4 chutes, and bolt holes are provided at the corresponding positions of the sliding hole plate 10. They are fixed by bolts and nuts. When the sliding hole plate 10 needs to be adjusted, loosen the 4 bolts simultaneously to adjust the sliding hole plate 10, and tighten the nuts after adjustment for fixation.

[0048] The design of the chutes and the bolt holes makes the adjustment of the sliding hole plate 10 more convenient and fast, ensuring the stability during the adjustment process.

[0049] Furthermore, the cross-section of the adjustment main board 2 is set to be in the shape of "ㄇ".

[0050] The cross-section design in the shape of "ㄇ" increases the strength and stability of the adjustment main board 2, while optimizing the air flow path and improving the heat dissipation efficiency.

[0051] Furthermore, the cross-section of the intermediate adjustment board 3 is set to be a smooth arc.

[0052] 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.

[0053] Embodiment Two

[0054] Further, a generator stator end adjustable baffle structure comprises the following steps:

[0055] S1: Real-time monitoring of the temperature of the generator stator end coil 11 and the copper ring 5;

[0056] S2: When the temperature of the end coil 11 and the copper ring is too high, loosen the connecting bolts and nuts of the adjusting main plate 2 and the connecting plate 6, adjust the distance between the adjusting main plate 2 and the end coil 11 and the copper ring, and then tighten the nuts to fix;

[0057] S3: Loosen the connecting bolts and nuts of the intermediate adjusting plate 3 and the connecting plate 6, adjust the distance between the intermediate adjusting plate 3 and the copper ring, and then tighten the nuts to fix;

[0058] S4: After the above steps are adjusted, the air passage area is improved, and whether the temperature of the end coil 11 and the copper ring is stable is detected;

[0059] S5: If the temperature of the end coil 11 and the copper ring continues to be high, repeat the above steps until the temperature of the end coil 11 and the copper ring 5 is stable.

[0060] This method of use makes the adjustment process of the generator stator end adjustable baffle structure more convenient and fast, can be adjusted in real time according to the actual running situation, and improves the heat dissipation efficiency and the stability of operation.

[0061] Further, after step S3, loosen the fixing bolts of the sliding hole plate 10 and the fixed hole plate 9, adjust the height of the sliding hole plate 10, and then tighten the nuts to fix.

[0062] By adjusting the height of the sliding hole plate 10, the air passage structure is further optimized, and the heat dissipation effect is improved. This design makes the adjustment process more flexible and adaptable.

[0063] Specifically, the use steps are:

[0064] Step 1: Temperature monitoring

[0065] Use the temperature sensor installed on the generator stator end coil 11 and the copper ring 5 to monitor the temperature of the end coil 11 and the copper ring 5 in real time. The temperature data is transmitted to the control system through the sensor for real-time display and analysis.

[0066] Step 2: Initial state check

[0067] Confirm that each component (fixed baffle 1, adjusting main plate 2, intermediate adjusting plate 3, adjusting hole plate 4, etc.) of the generator stator end adjustable baffle structure is in the initial position, and all connecting bolts and nuts are tightened.

[0068] Step 3: Adjustment when the temperature is too high

[0069] 1. Adjusting the main plate 2:

[0070] When the control system indicates that the end coil 11 and the copper ring 5 temperature exceeds the preset threshold, the operator first loosens the connecting bolts and nuts between the main plate 2 and the inner connecting plate 6.

[0071] Manually slide the main plate 2 closer or further away from the end or copper ring to change the air duct's airflow area. The adjustment distance should be based on temperature changes and experience. The smaller the air duct, the faster the flow rate, and the better the heat dissipation.

[0072] After adjustment, re-tighten the connecting bolts and nuts.

[0073] 2. Adjusting the middle adjusting plate 3:

[0074] Loosen the connecting bolts and nuts between the middle adjusting plate 3 and the connecting plate 6.

[0075] Slide the middle adjusting plate 3 to the appropriate position to further optimize the air duct structure.

[0076] After adjustment, tighten the connecting bolts and nuts.

[0077] 3. Adjusting the sliding hole plate 10 (optional):

[0078] If the structure design includes a sliding hole plate 10, adjust the height of the sliding hole plate 10 after loosening the fixing bolts between the sliding hole plate 10 and the fixed hole plate 9.

[0079] After adjustment, tighten the fixing bolts.

[0080] Step 4: Effect evaluation

[0081] After adjustment, continue to monitor the temperature changes of the end coil 11 and the copper ring 5, and evaluate the adjustment effect. If the temperature drops to a safe range and remains stable, the adjustment is successful.

[0082] If the temperature is still high, repeat step 3 and continue to adjust the position of the baffle, until the temperature stabilizes within an acceptable range.

[0083] Step 5: Record and maintenance

[0084] Record the time, adjusting plate position, temperature changes, etc. for each adjustment, for subsequent analysis and maintenance reference.

[0085] Regularly check the tightness of the baffle structure to ensure that all components are in the correct position, without looseness or damage.

[0086] Step 6: Emergency handling

[0087] In the event of a sudden temperature is too high, should immediately take emergency measures, such as increasing the cooling air flow or reduce the generator load, while the rapid adjustment of the baffle.

[0088] If the adjustment is invalid, should immediately stop checking, troubleshooting and then restart.

[0089] Through the above use method, the generator stator end adjustable baffle structure can be adjusted according to the actual operation and temperature changes, effectively improve the heat dissipation efficiency, reduce the temperature of the heating components, ensure the stable operation of the generator.

[0090] The above only for the preferred embodiments of the utility model, and not to limit the utility model, any modification, equivalent replacement and improvement within the spirit and principles of the utility model, etc., should be included in the protection scope of the utility model.

Claims

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

2. The adjustable wind deflector structure at the stator end of a generator according to claim 1, characterized in that: 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. The adjustable wind deflector structure at the stator end of a generator according to claim 2, characterized in that: Bolt holes for connecting the opening grooves (7) are provided at corresponding positions on the adjustment main board (2) and the intermediate adjustment board (3).

4. The adjustable wind deflector structure at the stator end of a generator according to claim 1, characterized in that: The surface of the adjustment hole board (4) is provided with uniformly distributed heat dissipation through holes (8).

5. The adjustable wind deflector structure at the stator end of a generator according to claim 1, characterized in that: The adjustment hole board (4) comprises a fixed hole board (9) and a sliding hole board (10) slidably connected to the fixed hole board (9).

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

7. The adjustable wind deflector structure at the stator end of a generator according to claim 1, characterized in that: The cross section of the adjustment main board (2) is set to be "factory" shaped.

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

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