Method and device for reducing temperature rise of end of magnetic pole coil of pumped storage power generation motor

Abstract

The application discloses a method and device for reducing temperature rise of a pumped storage power generation motor magnetic pole coil end, and belongs to the technical field of pumped storage power generation motors. The method comprises the following steps: a spoiler with adjustable length is arranged at the joint gap of the upper and lower end of the rotor yoke static wind baffle, the spoiler is arranged to extend into the space between the static wind baffle and the magnetic pole coil end, the spoiler is used for physically resisting and guiding the airflow, the relative wind speed of the cooling air and the end is significantly improved, the turbulence is enhanced, and the cold and hot fluid mixing is intensified. Meanwhile, the optimal assembly position of the spoiler is determined according to the comprehensive evaluation results of the temperature drop and vibration by measuring the temperature of multiple measuring points of the magnetic pole coil end and the vibration value of the wind baffle under different extension lengths. The application has the advantages of compact structure, low modification cost, significant reduction of the temperature rise of the magnetic pole coil end under the condition of not increasing additional installation space, consideration of the operation safety of the unit, and good engineering practicability.

Description

Technical Field

[0001] This invention relates to the field of pumped-storage generator motors, and specifically to a method and apparatus for reducing the temperature rise at the ends of the magnetic pole coils of a pumped-storage generator motor. Background Technology

[0002] Pumped storage is currently recognized globally as the safest, most stable, and highest energy density energy storage method, and a key pathway for building new power systems. The pumped storage generator (PSH) is its core equipment for converting mechanical energy into electrical energy. Essentially, a PSH generator is a high-speed, large-capacity hydro-turbine generator. Due to its high speed and large capacity, the rotor heat load is generally large, making the cooling of its magnetic pole coils crucial for ensuring the safe, stable, and reliable operation of the unit.

[0003] Existing technologies generally focus on cooling the heating element of the long-side copper busbar between the poles of the magnetic pole coil. For example, Chinese invention patent CN114421679A, published on April 29, 2022, entitled "A Cooling Structure for the Magnetic Pole Winding of a Salient Pole Synchronous Motor," describes a technical solution where a radial flow channel is provided in the middle of the magnetic pole winding, and a guide block is provided between the magnetic poles. Cooling gas flowing out of the yoke ventilation groove passes through the guide block to form a three-path directional ventilation cooling airflow. The first path of the directional ventilation cooling airflow enters the radial flow channel of the magnetic pole winding on one side of the guide block, the second path enters the radial flow channel of the magnetic pole winding on the other side of the guide block, and the third path enters between the two magnetic poles through the air guide hole to cool the outer surface of the magnetic pole winding.

[0004] Existing patented technologies rarely propose targeted methods to enhance the cooling of the copper busbar heating elements at both ends of the magnetic pole coil. In engineering practice, most methods involve using fans located at the upper and lower ends of the yoke to deliver cooling air to the magnetic pole coil located on the outer diameter side of the yoke. Some of the cooling air naturally passes over the ends of the magnetic pole coil before entering the interpole space or the air gap between the stator and rotor, thus cooling it, as disclosed in Chinese invention patent CN119628323A.

[0005] However, in engineering practice, it has been found that the space above the end of the magnetic pole coil on the outer diameter side of the fan is usually quite large, used to arrange the lead ends of the magnetic pole coil. With the aforementioned cooling method, the air velocity passing through this area is much lower than the air velocity between the magnetic poles, resulting in poor cooling of the end copper busbars. Simultaneously, the cooling air generated by the fan's rotation driven by the rotor and yoke has a velocity component along the rotational direction when flowing out of the fan's outer diameter outlet. When passing over the end of the magnetic pole coil, because the rotational speed and direction of the magnetic pole coil end are the same as those of the yoke and fan, the relative velocity between the cooling air and the end of the magnetic pole coil decreases, which is detrimental to end cooling. Therefore, in engineering practice, the cooling effect at the end of the magnetic pole coil is poor. Summary of the Invention

[0006] This invention aims to solve the problems of low relative wind speed and poor end cooling effect caused by the open space at the end of the magnetic pole coil in the prior art. It proposes a method and device to reduce the temperature rise at the end of the magnetic pole coil of a pumped storage generator motor. An adjustable-length baffle is installed at the joint gap of the stationary wind deflector. The physical disturbance of the airflow by the baffle significantly increases the relative wind speed at the end and enhances the turbulence. The optimal installation position of the baffle is determined by a comprehensive evaluation method, thereby achieving enhanced end cooling and effectively reducing the temperature rise while ensuring the safe operation of the unit.

[0007] To achieve the above-mentioned objectives, the technical solution of the present invention is as follows: A method for reducing the temperature rise at the ends of the magnetic pole coils of a pumped-storage generator includes: Step S1: Cooling fans are installed at the upper and lower ends of the rotor yoke, and stationary baffles are installed to cover the corresponding cooling fans and the ends of the magnetic pole coils; the stationary baffles adopt a segmented structure with an intermediate transition gap at the joint position. Step S2: Install a spoiler at each intermediate transition gap, so that the spoiler extends into the space between the stationary wind deflector and the end of the magnetic pole coil, and the extension length of the spoiler is adjustable. Step S3: By changing the insertion length of the spoiler, measure the end temperature of the magnetic pole coil and the vibration value of the baffle at different insertion lengths. Based on the measurement results, comprehensively evaluate the cooling effect and vibration, and determine the optimal assembly position of the spoiler.

[0008] Furthermore, step S3 specifically includes: Adjust the spoiler to at least three different insertion lengths in sequence; At each insertion length, temperature measuring paper is pasted at multiple measuring points at the end of the magnetic pole coil, and a vibration sensor is installed at the joint of the stationary wind deflector near the spoiler. Conduct rated operation tests on the unit, record vibration values ​​after thermal stability is achieved, and read the temperature at each measuring point after shutdown. By comparing the temperature and vibration values ​​at different insertion lengths, the insertion length with the optimal combination of vibration and temperature rise is selected as the final assembly position.

[0009] Preferably, the temperature measuring paper has a measuring point arranged in three regions at the end of the magnetic pole coil: the inner diameter side, the outer diameter side, and the radial center. There are one measuring point on the windward side, the leeward side, and the center of symmetry in each region, for a total of 9 measuring points.

[0010] Furthermore, the spoiler is provided with a rounded rectangular adjustment hole along the axial direction. The joint bolt passes through the adjustment hole to fix the spoiler. The width of the adjustment hole is 2mm larger than the diameter of the joint bolt. In step S2, the extension length of the lower end of the spoiler is adjusted by changing the fixing position of the adjustment hole and the joint bolt.

[0011] Preferably, the radial width of the spoiler covers the radial width of the end of the magnetic pole coil; the spoiler is made of high-strength laminated epoxy glass cloth or high-strength laminated epoxy carbon fiber cloth, and the fiber direction of the cloth is along the length direction of the spoiler.

[0012] Furthermore, a pad is provided at the radial inner gap and the radial outer gap of the intermediate transition gap, respectively. The thickness of the pad is the same as the width of the intermediate transition gap, and the pad does not extend beyond the plane of the stationary windbreak plate near the end of the magnetic pole coil.

[0013] Preferably, the distance between the axial projection position of the outer diameter end face of the inner pad and the inner diameter end face of the lead head of the inner diameter end of the magnetic pole coil is 20-50 mm; the distance between the axial projection position of the inner diameter end face of the outer pad and the outer diameter end face of the lead head of the outer diameter end of the magnetic pole coil is 20-50 mm.

[0014] Preferably, the stationary wind baffle has a curved transition from the outer diameter side of the magnetic pole coil end to the stator core end, and the contact position between the end of the stationary wind baffle and the stator end is sealed with a rubber strip.

[0015] Preferably, the circumference of the stationary wind deflector is divided into 6 to 20 segments, and the width of the intermediate transition gap is 6 to 12 mm.

[0016] Preferably, the thickness of the spoiler is 0.2 to 0.5 mm smaller than the width of the intermediate transition gap.

[0017] On the other hand, the present invention also proposes a device for reducing the temperature rise at the end of the magnetic pole coil of a pumped-storage generator motor, which is obtained by the method described above, comprising: Cooling fans are located at the upper and lower ends of the rotor yoke; A stationary wind deflector covers the corresponding cooling fan and the end of the magnetic pole coil. The stationary wind deflector has a segmented annular structure with a seam-jointing structure at the segment and an intermediate transition gap at the seam position. A spoiler is disposed at the intermediate transition gap, and the spoiler extends into the space between the stationary wind deflector and the end of the magnetic pole coil.

[0018] In summary, the present invention has the following advantages: 1. This invention provides a baffle plate in the cooling airflow channel corresponding to the end of the magnetic pole coil. By utilizing the physical obstruction and guiding effect of the baffle plate on the cooling airflow, the relative wind speed between the cooling air and the end of the magnetic pole coil is significantly increased, and the turbulence intensity of the airflow is greatly enhanced, and the mixing of hot and cold fluids is intensified. This effectively improves the convective heat transfer of the end copper busbar, effectively reduces the temperature rise at the end of the magnetic pole coil, and prevents the end from overheating.

[0019] 2. The present invention embeds a spoiler in the joint gap of the stationary wind deflector, making full use of the existing space of the split structure of the wind deflector. It does not require additional installation brackets or changes to the original layout. The structure is compact, the modification cost is low, and it has good engineering implementation convenience and economy. At the same time, the spoiler is fixed by the bolts through the joint and is provided with adjustment holes to adjust the extension length. The assembly is flexible and the maintainability is strong. 3. This invention determines the optimal assembly position by simultaneously measuring the temperature at multiple points at the end of the magnetic pole coil and the vibration value of the baffle plate under different insertion lengths, and by comprehensively evaluating the temperature drop and vibration risk. This maximizes the cooling effect while ensuring controllable vibration during unit operation, achieving a balance between cooling effect and mechanical stability, and providing a quantifiable solution for the end cooling problem of similar rotating motors. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall assembly of the present invention; Figure 2 This is a top view of the stationary windbreak panel of the present invention; Figure 3 This is a schematic diagram showing the arrangement of temperature measuring points at the ends of the magnetic pole coils in this invention; Figure 4 This is a schematic diagram of the assembly of a stationary wind deflector; Figure 5 Diagram showing the assembly of a stationary windshield and spoiler; Figure 6 This is a schematic diagram of the spoiler structure; Figure 7 This is a diagram showing the sealing structure between the stationary wind deflector and the stator end. Figure 8 The comparison diagrams show the airflow path before and after the spoiler is installed, where (a) is the airflow path without the spoiler and (b) is the airflow path with the spoiler. In the picture: 1. Magnetic yoke, 2. Magnetic pole, 3. Cooling fan, 4. Stationary baffle, 5. Joint position, 6. Vibration sensor, 7. Spoiler, 8. Adjustment hole, 9. Inner diameter side end lead wire, 10. Outer diameter side end lead wire, 11. Support arm, 12. Joint clamping bolt, 13. Arc segment, 14. Rubber strip, 15. Stator end. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] Example 1 The existing rotor yoke 1 has cooling fans 3 at its upper and lower ends, and stationary baffles 4 covering the cooling fans 3 and the ends of the magnetic pole 2 coils, respectively. The cooling air radially delivered by the cooling fan 3 at the upper end of the yoke 1 is directed to the space between the upper end of the magnetic pole 2 coil and the upper stationary baffle 4. The cooling air radially delivered by the cooling fan 3 at the lower end of the yoke 1 is directed to the space between the lower end of the magnetic pole 2 coil and the lower stationary baffle 4.

[0024] To improve the cooling effect of the copper busbar at the end of the magnetic pole 2 coil, the present invention provides a device for reducing the temperature rise at the end of the magnetic pole 2 coil of a pumped storage generator motor. The device, based on the arrangement of cooling fans 3 and stationary baffles 4 at the upper and lower ends of the rotor yoke 1, further arranges a baffle 7 in the space formed by the stationary baffle 4 and the end of the magnetic pole 2 coil. Through the disturbance effect of the baffle 7, the relative wind speed between the cooling air and the end of the magnetic pole 2 coil is increased, thereby improving the cooling effect at the end of the magnetic pole 2 coil.

[0025] like Figure 2 As shown, the stationary wind deflector 4 is made of fiberglass and appears as a ring when viewed from above. The stationary wind deflector 4 adopts a segmented structure, with the circumference divided into 6 to 20 segments (in multiples of the number of support arms 11 on the upper frame). The segments are connected and fixed by a joint structure.

[0026] In this embodiment, the stationary baffle 4 is a flat plate structure within the range of the cooling fan 3 and the end of the magnetic pole 2 coil, and has a curved transition from the outer diameter side of the end of the magnetic pole 2 coil to the end of the stator core (e.g., ...). Figure 7 (As shown), transition section see Figure 7The arc segment 13 shown is intended to make the flow of cooling air smoother, reducing wind resistance and unnecessary wind friction loss. Furthermore, at the upper and lower ends of the magnetic yoke 1, the ends of the stationary baffle 4 contact the stator end 15, and the contact position is sealed with rubber strips 14 to prevent the cooling air from forming a bypass leakage between the baffle and the stator end 15, ensuring that all the cooling air flows through the end area of ​​the magnetic pole 2 coil.

[0027] At all joint positions 5 of the stationary baffle plate 4, intermediate transition gaps with a width of 6–12 mm (circumferential tangential width) are provided. A spoiler 7 is installed at each intermediate transition gap. The thickness of the spoiler 7 is 0.2–0.5 mm smaller than the width of the intermediate transition gap, and the radial width of the spoiler 7 covers the radial width of the end of the magnetic pole 2 coil. The lower end of the spoiler 7 extends into the space between the stationary baffle plate 4 and the end of the magnetic pole 2 coil, acting as a turbulence breaker to increase the relative wind speed between the cooling air and the end of the magnetic pole 2 coil, and to enhance turbulence. Figure 8 As shown, after installing the spoiler 7, the flow state of the cooling airflow in the end region changes: compared to the case where the airflow smoothly sweeps across the direction of rotation and the relative speed is lower when the spoiler is not installed ( Figure 8 In (a), the spoiler physically impedes and guides the airflow, causing turbulence, increased turbulence intensity, and intensified mixing of hot and cold fluids. Figure 8 (b) thus effectively improves the convective heat transfer efficiency of the end copper busbar.

[0028] In this embodiment, the spoiler 7 is made of high-strength laminated epoxy glass cloth or high-strength laminated epoxy carbon fiber cloth. The fiber direction of the fabric is along the length direction of the spoiler 7, so that it has higher compressive strength and bending modulus in the thickness direction (i.e., the width direction of the joint gap).

[0029] The extension length of the spoiler 7 is adjusted according to the turbulence test results. Preferably, to facilitate the adjustment of the extension length of the lower end of the spoiler 7, an adjustment hole 8 is provided on the spoiler 7 along the axial direction. The adjustment hole 8 is a rounded rectangular hole, through which the coupling bolt 12 passes to fix the spoiler 7. The width of the rounded rectangular hole is about 2 mm larger than the diameter of the coupling bolt 12.

[0030] Furthermore, a pad is placed at both the radial inner and radial outer gaps after the spoiler 7 is installed. The thickness of the pad is the same as the width of the intermediate transition gap, serving to fill the gaps and prevent air leakage. The pad does not extend beyond the plane of the stationary windbreak 4 near the end of the magnetic pole 2 coil.

[0031] Preferably, the distance S1 between the axial projection position of the outer diameter end face of the inner pad and the inner diameter end face of the lead head 9 of the inner diameter end of the magnetic pole 2 coil is 20-50 mm. The distance S2 between the axial projection position of the inner diameter end face of the outer pad and the outer diameter end face of the lead head 10 of the outer diameter end of the magnetic pole 2 coil is 20-50 mm.

[0032] Example 2 This invention proposes a method for reducing the temperature rise at the end of the magnetic pole 2 coil of a pumped-storage generator motor, comprising the following steps: Step S1: Design the stationary wind deflector 4 at the upper and lower ends of the magnetic yoke 1 as a segmented structure that can be assembled into a complete circular ring, with the circumference divided into 6 to 20 segments (in multiples of the number of support arms 11 on the upper frame).

[0033] Step S2: When installing the stationary wind deflector 4, assemble it into a circle, leaving a 6-12 mm intermediate transition gap at the joint position 5. Install pads to fill the gaps on the radial inner and outer sides, and leave a gap for the installation of the spoiler 7. Then tighten the joint bolts 12 at the pad positions, and complete the installation of the support structure between the stationary wind deflector 4 and the upper and lower frames. During installation, adjust the distance between the stationary wind deflector 4 and the magnetic yoke 1 fan to 8-15 mm to reduce air leakage at this point without mechanical scraping.

[0034] Step S3: Install a spoiler 7 at the remaining gaps in all joint positions 5. The spoiler 7 is provided with an adjustment hole 8 to adjust the length of its lower end. Considering the cooling effect, noise level, and vibration of the baffle, adjust, evaluate, and finally determine the specific installation position of the spoiler 7.

[0035] Preferably, the radial width of the spoiler 7 covers the radial width of the end of the magnetic pole 2 coil.

[0036] Preferably, the adjusting hole 8 is a rounded rectangular hole, and the width of the adjusting hole 8 is 2mm larger than the diameter of the connecting bolt 12.

[0037] Preferably, the spoiler 7 is a cuboid. The thickness of the spoiler 7 is 0.2 to 0.5 mm smaller than the width of the installation gap.

[0038] Preferably, the spoiler 7 is made of high-strength laminated epoxy glass cloth or high-strength laminated epoxy carbon fiber cloth, and the fiber direction of the fabric is along the length direction (radial) of the spoiler 7, so that it has higher compressive strength and bending modulus in the thickness direction (i.e., the width of the joint gap).

[0039] The lower end of the spoiler 7 extends into the space between the stationary wind deflector 4 and the end of the magnetic pole 2 coil. The extension length is adjusted according to the test results.

[0040] Preferably, the radial positions of the spoilers 7 in each intermediate transition gap remain consistent.

[0041] Taking into account the overall cooling effect, noise level, and baffle vibration, the specific assembly position of the spoiler 7 is adjusted, evaluated, and finally determined. Taking the installation position adjustment of the spoiler 7 at the upper end of the magnetic yoke 1 as an example, the specific steps include: Step S3-1: Insert the spoiler 7 with an axial width of L0 into the remaining gap in the joint. Let the axial height of the stationary wind deflector 4 at the joint be K. Adjust the installation position of the spoiler 7 so that its lower end face extends beyond the lower end face of the stationary wind deflector 4 by a length (i.e., the initial extension length) L1 = (L0 - K) / 3, and then tighten the nuts of the joint bolts.

[0042] Step S3-2: Attach temperature test strips to the end coil of a specific magnetic pole (denoted as pole #1). Specifically, attach strips to three locations: the inner diameter side, the outer diameter side, and the radial center of the magnetic pole. These locations are marked at three points: the windward side, the leeward side, and the symmetrical center of the coil end of the middle magnetic pole. A total of 3 x 3 = 9 locations are used. Figure 3 As shown. The temperature measuring strip at each location has a resolution of 2℃ and a temperature range of 100~140℃.

[0043] Simultaneously, a vibration sensor 6 is installed near the spoiler 7 at the joint of the stationary wind deflector 4 to measure circumferential vibration, i.e., horizontal vibration perpendicular to the stationary wind deflector 4. In practice, vibration sensors can be installed at two joints with an included angle of 90° around the entire circumference, such as... Figure 2 As shown.

[0044] Step S3-3: Conduct the rated operation test of the unit. After reaching thermal stability, continue operating for 1 hour, then shut down. During this process, measure and record the vibration value K of vibration sensor 6. 1m (1 represents magnetic pole #1, m is 1 or 2, representing two vibration measurement positions). After shutdown, use an endoscope to examine and photograph the temperature measuring paper on the upper end of the magnetic pole coil of magnetic pole #1 to identify the temperature T at each point. 1n (1 represents the 1st magnetic pole, and n is 1 to 9, representing 9 positions).

[0045] Step S3-4: Then, adjust the insertion depth of the spoiler 7 so that L1 = (L0 - K) / 2, and tighten the nuts of the joint bolts.

[0046] Step S3-5: Repeat the application of test paper at the same 9 positions on the upper end of the coil of the adjacent magnetic pole (referred to as magnetic pole 2) of magnetic pole 1.

[0047] Step S3-6: Repeat step 3-3 and record the vibration value K. 2m(2 represents magnetic pole #2, m is 1 or 2, representing two vibration measurement positions). Then stop the machine. After stopping the machine, use an endoscope to examine and photograph the temperature measuring paper of the magnetic pole coil at the upper end of magnetic pole #2 to identify the temperature T at each point. 2n (2 represents the 2nd magnetic pole, and n is 1 to 9, representing 9 positions).

[0048] Step S3-7: Then, adjust the insertion depth of the spoiler 7 so that L1 is L0-K, and tighten the nut of the bolt at the joint position.

[0049] Step S3-8: Repeat the application of test paper at the same 9 positions on the upper end of the coil next to the #2 magnetic pole (referred to as the #3 magnetic pole).

[0050] Step S3-9: Repeat step S3-3 and record the vibration value K. 3m (3 represents magnetic pole #3, m is 1 or 2, representing two vibration measurement positions). Then stop the machine. After stopping the machine, use an endoscope to examine and photograph the temperature measuring paper of the magnetic pole coil at the upper end of magnetic pole #3 to identify the temperature T at each point. 3n (3 represents the 3rd magnetic pole, and n is 1 to 9, representing 9 positions).

[0051] Based on a comprehensive judgment of the above K im (i is 1, 2, 3; m is 1, 2), T in (i is 1, 2, 3; n is 1 to 9), the assembly position with the lowest temperature rise is selected as the final solution; if the vibration value corresponding to this position exceeds the safe operating range, the one with the lowest temperature rise is selected among all the methods where the vibration value meets the safety requirements; if the temperature rise is the same, the one with the lower vibration value is selected.

[0052] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A method for reducing the temperature rise at the ends of the magnetic pole coils of a pumped-storage power generator, characterized in that, include: Step S1: Cooling fans (3) are installed at the upper and lower ends of the rotor yoke (1), and stationary baffles (4) are installed to cover the ends of the corresponding cooling fans (3) and magnetic pole (2) coils; the stationary baffles (4) adopt a split structure, and an intermediate transition gap is left at the joint position (5); Step S2: Install a spoiler (7) at each intermediate transition gap, so that the spoiler (7) extends into the space between the stationary wind deflector (4) and the end of the magnetic pole (2) coil, and the extension length of the spoiler (7) is adjustable; Step S3: By changing the insertion length of the spoiler (7), the end temperature of the magnetic pole (2) coil and the vibration value of the baffle plate are measured at different insertion lengths. Based on the measurement results, the cooling effect and vibration are comprehensively evaluated to determine the optimal assembly position of the spoiler (7); specifically including: Adjust the spoiler (7) to at least three different insertion lengths in sequence; At each insertion length, temperature test paper is pasted at multiple measuring points at the end of the magnetic pole (2) coil, and a vibration sensor (6) is installed at the joint of the stationary windbreak (4) near the spoiler (7). Conduct rated operation tests on the unit, record vibration values ​​after thermal stability is achieved, and read the temperature at each measuring point after shutdown. Compare the temperature and vibration values ​​under different insertion lengths, and select the insertion length with the optimal combination of vibration and temperature rise as the final assembly position; The temperature measuring paper has a measuring point arranged in three regions: the inner diameter side, the outer diameter side, and the radial center of the magnetic pole (2) coil end. There are 9 measuring points in total, with one measuring point on the windward side, the leeward side, and the center of the symmetrical position in each region. The stationary wind deflector (4) transitions from the outer diameter side of the end of the magnetic pole (2) coil to the end of the stator core in a curved manner, and the contact position between the end of the stationary wind deflector (4) and the stator end (15) is sealed with a rubber strip (14).

2. The method for reducing the temperature rise at the end of the magnetic pole coil of a pumped-storage generator as described in claim 1, characterized in that, The spoiler (7) is provided with a rounded rectangular adjustment hole (8) along the axial direction. The joint bolt (12) passes through the adjustment hole (8) to fix the spoiler (7). The width of the adjustment hole (8) is 2mm larger than the diameter of the joint bolt (12). In step S2, the insertion length of the lower end of the spoiler (7) is adjusted by changing the fixed position of the adjustment hole (8) and the joint bolt (12).

3. The method for reducing the temperature rise at the end of the magnetic pole coil of a pumped-storage generator as described in claim 2, characterized in that, The radial width of the baffle (7) covers the radial width of the end of the magnetic pole (2) coil; the baffle (7) is made of high-strength laminated epoxy glass cloth or high-strength laminated epoxy carbon fiber cloth, and the fiber direction of the cloth blank is along the length direction of the baffle (7).

4. The method for reducing the temperature rise at the end of the magnetic pole coil of a pumped-storage generator as described in claim 1, characterized in that, A pad is provided at the radial inner gap and the radial outer gap of the intermediate transition gap, respectively. The thickness of the pad is the same as the width of the intermediate transition gap, and the pad does not exceed the plane of the stationary windbreak plate (4) near the end of the magnetic pole (2) coil.

5. A method for reducing the temperature rise at the end of the magnetic pole coil of a pumped-storage generator motor as described in claim 4, characterized in that, The distance between the axial projection position of the outer diameter side end face of the inner pad and the inner diameter side end face of the lead head (9) of the inner diameter side of the magnetic pole (2) coil is 20-50 mm; the distance between the axial projection position of the inner diameter side end face of the outer pad and the outer diameter side end face of the lead head (10) of the outer diameter side of the magnetic pole (2) coil is 20-50 mm.

6. The method for reducing the temperature rise at the end of the magnetic pole coil of a pumped-storage generator motor as described in claim 1, characterized in that, The stationary wind deflector (4) is divided into 6 to 20 lobes around its circumference, and the width of the intermediate transition gap is 6 to 12 mm.

7. The method for reducing the temperature rise at the end of the magnetic pole coil of a pumped-storage generator as described in claim 1, characterized in that, The thickness of the spoiler (7) is 0.2 to 0.5 mm smaller than the width of the intermediate transition gap.

8. A device for reducing the temperature rise at the end of the magnetic pole coil of a pumped-storage generator motor, obtained by means of the method described in any one of claims 1 to 7, characterized in that, include: Cooling fans (3) are installed at the upper and lower ends of the rotor yoke (1); A stationary baffle (4) covers the ends of the corresponding cooling fan (3) and magnetic pole (2) coils. The stationary baffle (4) is a segmented annular structure with a seam-jointing structure at the segment and an intermediate transition gap at the seam position (5). A spoiler (7) is provided at the intermediate transition gap, and the spoiler (7) extends into the space between the stationary wind deflector (4) and the end of the magnetic pole (2) coil.

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