Method for improving temperature rise uniformity of windward side and leeward side of pole coil

Abstract

The invention discloses a method for improving the temperature rise uniformity of the windward side and the leeward side of a pole coil, and belongs to the technical field of pumped storage generator motor cooling, and the method comprises the following steps: S1, fixing an interelectrode partition plate on a magnet yoke, and forming a pole coil outer side ventilation duct between two adjacent pole coils; s2, an interelectrode side middle air duct, an interelectrode radial air duct and an interelectrode lateral air duct are arranged on the interelectrode partition partition plate; s3, the ventilation holes, the radial air holes and the radial-to-circumferential air holes form radial air channels in the pole coils; s4, a first gap is formed between the pole coil and the pole iron core, and a second gap is formed between the iron supporting plate and the pole iron core; and S5, cooling air is divided into three cooling air paths through the interelectrode partition plates to cool the pole coil. The distribution of cooling air volume of each part of the pole coil is more flexible and effective, the refinement degree of air volume distribution is adjustable, and the temperature rise uniformity of the windward side and the leeward side of the pole coil can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of cooling high-speed, large-capacity hydroelectric generators and pumped-storage power generation motors, and in particular to a method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil. Background Art

[0002] When the rotors of hydro-turbine generators and pumped-storage power generation motors rotate in a certain direction, the windward side of the outer side of the pole coil is cooled better than the leeward side of the pole. The temperature rise of the leeward side is often higher than that of the windward side, resulting in a large temperature difference on both sides of the pole coil. This is an inevitable problem of temperature rise uniformity caused by the inherent structure of the rotor, which can easily lead to the problem of uncoordinated thermal deformation of the pole coil. This problem is more prominent for high-speed, large-capacity generators and pumped-storage power generation motors in hydropower projects.

[0003] At present, internal air ducts are usually set in the pole coils to enhance the cooling effect of the pole coils. However, the difference in cooling conditions on the windward and leeward sides of the pole coils is not considered, and no targeted method is proposed for the uniformity of temperature rise on the windward and leeward sides of the pole coils.

[0004] A Chinese patent document with publication number CN103715803A and publication date April 9, 2014 discloses a method for internal cooling and external cooling of rotor poles. The cooling gas flows into the channel between the two pole coils through the ventilation partitioning device on the air inlet end of the two pole coils to form an external cooling ventilation path, and cools the outside of the pole coil. At the same time, the cooling gas flows into the interior of the pole coil through the gap between the pole core and the pole coil to form an internal cooling ventilation path, and cools the inside of the pole coil. Then, it flows from the inside of the pole coil to the channel between the two pole coils. The ventilation partitioning device separates the external cooling ventilation path and the internal cooling ventilation path flowing into the channel from each other.

[0005] The patent document discloses a method for cooling the rotor magnetic poles by internal cooling and external cooling. The magnetic pole coils are cooled internally and externally at the same time, and the ventilation paths of internal cooling and external cooling in the channel between the two magnetic pole coils are separated, so that the internal cooling and external cooling ventilation paths do not interfere with each other, and the cooling gas of the internal ventilation can flow smoothly into the channel between the two magnetic pole coils, thereby improving the cooling effect of the entire rotor magnetic pole. However, the distribution of cooling air volume in various parts of the magnetic pole coil is not easy to adjust, and the temperature rise uniformity of the windward and leeward sides of the magnetic pole coil cannot be improved. Summary of the invention

[0006] In order to overcome the defects of the above-mentioned prior art, the present invention provides a method for improving the uniformity of temperature rise on the windward and leeward surfaces of a magnetic pole coil. The distribution of cooling air volume at various parts of the magnetic pole coil of the present invention is more flexible and effective, and the degree of refinement of air volume distribution is adjustable, which can improve the uniformity of temperature rise on the windward and leeward surfaces of the magnetic pole coil.

[0007] The present invention is achieved through the following technical solutions: A method for improving the uniformity of temperature rise on the windward and leeward surfaces of a magnetic pole coil comprises the following steps: S1. Install the inter-pole partition plate between two adjacent magnetic pole coils and fix the inter-pole partition plate on the magnetic yoke to form an outer ventilation channel of the magnetic pole coil between the two adjacent magnetic pole coils; S2. An inter-pole side central air duct, an inter-pole radial air duct and an inter-pole lateral air duct are arranged on the inter-pole partition plate; S3, a plurality of radially penetrating ventilation holes are arranged along the axial direction of the magnetic pole coil, radial air holes are arranged on the insulating support plate, circumferential ventilation grooves and radial-to-circumferential air holes are arranged on the iron support plate, the ventilation holes, radial air holes and radial-to-circumferential air holes form radial air ducts inside the magnetic pole coil, and the radial air ducts inside the magnetic pole coil are distributed on the leeward side and the windward side of the magnetic pole coil; S4, a first gap is set between the magnetic pole coil and the magnetic pole core, and a second gap is set between the iron support plate and the magnetic pole core, and the first gap and the second gap are connected to form a radial air duct inside the magnetic pole coil; S5. The cooling air is divided into three cooling air paths through the inter-pole partition plates to cool the magnetic pole coils.

[0008] In S3, the cross-sectional shape of the ventilation hole is a rectangle, a trapezoid, a circle or a rounded rectangle.

[0009] In S3, the cross-sectional shape of the radial air hole is a circle or a rounded rectangle.

[0010] In the above S3, the cross-sectional shape of the radial-to-circumferential air hole is a circle or a rounded rectangle.

[0011] In the above S3, there are multiple circumferential ventilation grooves and radial-to-circumferential air holes, and the circumferential ventilation grooves and radial-to-circumferential air holes are arranged at intervals on the iron support plate.

[0012] In S4, the first gap refers to the gap formed between the inner side of the pole coil and the pole core, and the second gap refers to the gap formed between the circumferential ventilation groove on the iron support plate and the pole core.

[0013] In the above S5, the three cooling air paths refer to the cooling air path on the inner side of the magnetic pole coil, the cooling air path inside the magnetic pole coil and the cooling air path on the outer side of the magnetic pole coil.

[0014] The cooling air passage on the inner side of the pole coil comprises an inter-pole lateral air passage and an inner radial air passage of the pole coil, and the inner radial air passage of the pole coil is connected with the inter-pole lateral air passage.

[0015] The internal cooling air passage of the magnetic pole coil comprises an inter-pole side middle air passage and a radial air passage inside the magnetic pole coil, and the radial air passage inside the magnetic pole coil is connected with the inter-pole side middle air passage.

[0016] The cooling air passage on the outer side of the magnetic pole coil comprises an inter-pole radial air passage and a magnetic pole coil outer ventilation passage, and the magnetic pole coil outer ventilation passage is connected to the inter-pole radial air passage.

[0017] The outer diameter side surface of the inter-pole partitioning partition plate contacts the inner diameter side surface of the magnetic pole coil.

[0018] In S3, the total cross-sectional area of ​​the radial wind passages inside the magnetic pole coil distributed on the leeward side of the magnetic pole coil is greater than the total cross-sectional area of ​​the radial wind passages inside the magnetic pole coil distributed on the windward side of the magnetic pole coil.

[0019] An application for improving the temperature rise of the windward side and the leeward side of a magnetic pole coil is suitable for adjusting the temperature rise uniformity of the windward side and the leeward side of a magnetic pole coil of a hydro-turbine generator.

[0020] The beneficial effects of the present invention are mainly manifested in the following aspects: 1. Compared with the prior art, the present invention is more flexible and effective in distributing cooling air volume to various parts of the pole coil, and the refinement degree of air volume distribution is adjustable, which can improve the temperature rise uniformity of the windward and leeward surfaces of the pole coil.

[0021] 2. The present invention comprehensively considers the cooling requirements of the inner surface, outer surface and interior of the magnetic pole coil, and can improve the temperature rise uniformity of the windward side and the leeward side of the magnetic pole coil.

[0022] 3. The present invention can effectively improve the cooling effect and structural safety of the turbine generator rotor.

[0023] 4. The present invention can improve the temperature rise uniformity of the windward side and the leeward side of the magnetic pole coil and has good applicability.

[0024] 5. In the present invention, the total cross-sectional area of ​​the radial wind duct inside the pole coil distributed on the leeward side of the pole coil is larger than the total cross-sectional area of ​​the radial wind duct inside the pole coil distributed on the windward side of the pole coil. By setting the number of ventilation holes, radial wind holes and radial circumferential wind holes distributed on the leeward side of the pole coil to be greater than the number of ventilation holes, radial wind holes and radial circumferential wind holes distributed on the windward side of the pole coil, or setting the size of the ventilation holes, radial wind holes and radial circumferential wind holes distributed on the leeward side of the pole coil to be larger than the size of the ventilation holes, radial wind holes and radial circumferential wind holes distributed on the windward side of the pole coil, the internal cooling wind volume on the leeward side of the pole coil is greater than the internal cooling wind volume on the windward side of the pole coil, thereby achieving refined distribution of the cooling air volume, and further achieving the effect of effectively improving the temperature rise uniformity of the windward side and leeward side of the pole coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 B view in the figure; Figure 3 for Figure 1 C-direction view of the middle iron support plate; Figure 4 for Figure 1 C-direction view of the middle insulating bracket; Figure 5 for Figure 1 D-direction view in; Markings in the figure: 1. inter-pole partition plate, 2. pole coil, 3. yoke, 4. ventilation duct outside the pole coil, 5. inter-pole side middle air duct, 6. inter-pole radial air duct, 7. inter-pole lateral air duct, 8. ventilation hole, 9. insulating support plate, 10. radial air hole, 11. iron support plate, 12. circumferential ventilation groove, 13. radial to circumferential air hole, 14. radial air duct inside the pole coil, 15. pole core, 16. first gap, 17. second gap, 18. radial air duct inside the pole coil. DETAILED DESCRIPTION

[0026] Example 1 See also Figure 1-Figure 4 , a method for improving the uniformity of temperature rise on the windward and leeward surfaces of a magnetic pole coil, comprising the following steps: S1, installing the inter-pole partition plate 1 between two adjacent magnetic pole coils 2, and fixing the inter-pole partition plate 1 on the magnetic yoke 3, so that a magnetic pole coil outer ventilation duct 4 is formed between the two adjacent magnetic pole coils 2; S2. An inter-pole side middle air duct 5, an inter-pole radial air duct 6 and an inter-pole lateral air duct 7 are arranged on the inter-pole partition plate 1; S3, a plurality of radially penetrating ventilation holes 8 are arranged along the axial direction of the magnetic pole coil 2, radial air holes 10 are arranged on the insulating support plate 9, and circumferential ventilation grooves 12 and radial-to-circumferential air holes 13 are arranged on the iron support plate 11, and the ventilation holes 8, radial air holes 10 and radial-to-circumferential air holes 13 form radial air ducts 14 inside the magnetic pole coil, and the radial air ducts 14 inside the magnetic pole coil are distributed on the leeward side and the windward side of the magnetic pole coil 2; S4, a first gap 16 is provided between the magnetic pole coil 2 and the magnetic pole core 15, a second gap 17 is provided between the iron support plate 11 and the magnetic pole core 15, and the first gap 16 and the second gap 17 are connected to form a radial air duct 18 inside the magnetic pole coil; S5. The cooling air is divided into three cooling air paths through the inter-pole partition plate 1 to cool the magnetic pole coil 2.

[0027] This embodiment is the most basic implementation method. Compared with the prior art, the distribution of cooling air volume in various parts of the pole coil 2 is more flexible and effective, the degree of refinement of air volume distribution is adjustable, and the temperature rise uniformity of the windward and leeward sides of the pole coil 2 can be improved.

[0028] Example 2 See also Figure 1-Figure 4 , a method for improving the uniformity of temperature rise on the windward and leeward surfaces of a magnetic pole coil, comprising the following steps: S1, installing the inter-pole partition plate 1 between two adjacent magnetic pole coils 2, and fixing the inter-pole partition plate 1 on the magnetic yoke 3, so that a magnetic pole coil outer ventilation duct 4 is formed between the two adjacent magnetic pole coils 2; S2. An inter-pole side middle air duct 5, an inter-pole radial air duct 6 and an inter-pole lateral air duct 7 are arranged on the inter-pole partition plate 1; S3, a plurality of radially penetrating ventilation holes 8 are arranged along the axial direction of the magnetic pole coil 2, radial air holes 10 are arranged on the insulating support plate 9, and circumferential ventilation grooves 12 and radial-to-circumferential air holes 13 are arranged on the iron support plate 11, and the ventilation holes 8, radial air holes 10 and radial-to-circumferential air holes 13 form radial air ducts 14 inside the magnetic pole coil, and the radial air ducts 14 inside the magnetic pole coil are distributed on the leeward side and the windward side of the magnetic pole coil 2; S4, a first gap 16 is provided between the magnetic pole coil 2 and the magnetic pole core 15, a second gap 17 is provided between the iron support plate 11 and the magnetic pole core 15, and the first gap 16 and the second gap 17 are connected to form a radial air duct 18 inside the magnetic pole coil; S5. The cooling air is divided into three cooling air paths through the inter-pole partition plate 1 to cool the magnetic pole coil 2.

[0029] Preferably, in S3, the cross-sectional shape of the ventilation hole 8 is circular.

[0030] In the above S3, the cross-sectional shape of the radial air hole 10 is circular.

[0031] In the above S3, the cross-sectional shape of the radial-to-circumferential air hole 13 is circular.

[0032] In the above S3 , there are multiple circumferential ventilation slots 12 and multiple radial-to-circumferential air holes 13 , and the circumferential ventilation slots 12 and multiple radial-to-circumferential air holes 13 are arranged on the iron support plate 11 at intervals.

[0033] This embodiment is a preferred implementation method, which comprehensively considers the cooling requirements of the inner surface, outer surface and interior of the pole coil 2, and can improve the temperature rise uniformity of the windward side and the leeward side of the pole coil 2.

[0034] Example 3 See also Figure 1-Figure 4 , a method for improving the uniformity of temperature rise on the windward and leeward surfaces of a magnetic pole coil, comprising the following steps: S1, installing the inter-pole partition plate 1 between two adjacent magnetic pole coils 2, and fixing the inter-pole partition plate 1 on the magnetic yoke 3, so that a magnetic pole coil outer ventilation duct 4 is formed between the two adjacent magnetic pole coils 2; S2. An inter-pole side middle air duct 5, an inter-pole radial air duct 6 and an inter-pole lateral air duct 7 are arranged on the inter-pole partition plate 1; S3, a plurality of radially penetrating ventilation holes 8 are arranged along the axial direction of the magnetic pole coil 2, radial air holes 10 are arranged on the insulating support plate 9, and circumferential ventilation grooves 12 and radial-to-circumferential air holes 13 are arranged on the iron support plate 11, and the ventilation holes 8, radial air holes 10 and radial-to-circumferential air holes 13 form radial air ducts 14 inside the magnetic pole coil, and the radial air ducts 14 inside the magnetic pole coil are distributed on the leeward side and the windward side of the magnetic pole coil 2; S4, a first gap 16 is provided between the magnetic pole coil 2 and the magnetic pole core 15, a second gap 17 is provided between the iron support plate 11 and the magnetic pole core 15, and the first gap 16 and the second gap 17 are connected to form a radial air duct 18 inside the magnetic pole coil; S5. The cooling air is divided into three cooling air paths through the inter-pole partition plate 1 to cool the magnetic pole coil 2.

[0035] In the above S3, the cross-sectional shape of the ventilation hole 8 is a rounded rectangle.

[0036] In the above S3, the cross-sectional shape of the radial air hole 10 is a rounded rectangle.

[0037] In the above S3, the cross-sectional shape of the radial-to-circumferential air hole 13 is a rounded rectangle.

[0038] In the above S3 , there are multiple circumferential ventilation slots 12 and multiple radial-to-circumferential air holes 13 , and the circumferential ventilation slots 12 and multiple radial-to-circumferential air holes 13 are arranged on the iron support plate 11 at intervals.

[0039] In S4 , the first gap 16 refers to the gap formed between the inner side of the pole coil 2 and the pole core 15 , and the second gap 17 refers to the gap formed between the circumferential ventilation groove 12 on the iron support plate 11 and the pole core 15 .

[0040] In the above S5, the three cooling air paths refer to the cooling air path on the inner side of the magnetic pole coil, the cooling air path inside the magnetic pole coil and the cooling air path on the outer side of the magnetic pole coil.

[0041] The cooling air passage on the inner side of the pole coil comprises an inter-pole lateral air passage 7 and an inner radial air passage 18 of the pole coil. The inner radial air passage 18 of the pole coil is connected to the inter-pole lateral air passage 7.

[0042] The cooling air passage inside the pole coil includes an inter-pole side middle air passage 5 and a pole coil internal radial air passage 14 , and the pole coil internal radial air passage 14 is connected to the inter-pole side middle air passage 5 .

[0043] This embodiment is another preferred implementation method, which can effectively improve the cooling effect and structural safety of the turbine generator rotor.

[0044] Example 4 See also Figure 1-Figure 5 , a method for improving the uniformity of temperature rise on the windward and leeward surfaces of a magnetic pole coil, comprising the following steps: S1, installing the inter-pole partition plate 1 between two adjacent magnetic pole coils 2, and fixing the inter-pole partition plate 1 on the magnetic yoke 3, so that a magnetic pole coil outer ventilation duct 4 is formed between the two adjacent magnetic pole coils 2; S2. An inter-pole side middle air duct 5, an inter-pole radial air duct 6 and an inter-pole lateral air duct 7 are arranged on the inter-pole partition plate 1; S3, a plurality of radially penetrating ventilation holes 8 are arranged along the axial direction of the magnetic pole coil 2, radial air holes 10 are arranged on the insulating support plate 9, and circumferential ventilation grooves 12 and radial-to-circumferential air holes 13 are arranged on the iron support plate 11, and the ventilation holes 8, radial air holes 10 and radial-to-circumferential air holes 13 form radial air ducts 14 inside the magnetic pole coil, and the radial air ducts 14 inside the magnetic pole coil are distributed on the leeward side and the windward side of the magnetic pole coil 2; S4, a first gap 16 is provided between the magnetic pole coil 2 and the magnetic pole core 15, a second gap 17 is provided between the iron support plate 11 and the magnetic pole core 15, and the first gap 16 and the second gap 17 are connected to form a radial air duct 18 inside the magnetic pole coil; S5. The cooling air is divided into three cooling air paths through the inter-pole partition plate 1 to cool the magnetic pole coil 2.

[0045] In the above S3, the cross-sectional shape of the ventilation hole 8 is a rectangle.

[0046] In the above S3, the cross-sectional shape of the radial air hole 10 is a rounded rectangle.

[0047] In the above S3, the cross-sectional shape of the radial-to-circumferential air hole 13 is a rounded rectangle.

[0048] In the above S3 , there are multiple circumferential ventilation slots 12 and multiple radial-to-circumferential air holes 13 , and the circumferential ventilation slots 12 and multiple radial-to-circumferential air holes 13 are arranged on the iron support plate 11 at intervals.

[0049] In S4 , the first gap 16 refers to the gap formed between the inner side of the pole coil 2 and the pole core 15 , and the second gap 17 refers to the gap formed between the circumferential ventilation groove 12 on the iron support plate 11 and the pole core 15 .

[0050] Further preferably, in S5, the three cooling air paths refer to the cooling air path on the inner side of the magnetic pole coil, the cooling air path inside the magnetic pole coil and the cooling air path on the outer side of the magnetic pole coil.

[0051] The cooling air passage on the inner side of the pole coil comprises an inter-pole lateral air passage 7 and an inner radial air passage 18 of the pole coil. The inner radial air passage 18 of the pole coil is connected to the inter-pole lateral air passage 7.

[0052] The cooling air passage inside the pole coil includes an inter-pole side middle air passage 5 and a pole coil internal radial air passage 14 , and the pole coil internal radial air passage 14 is connected to the inter-pole side middle air passage 5 .

[0053] The cooling air passage on the outer side of the pole coil comprises an inter-pole radial air passage 6 and a pole coil outer ventilation passage 4 , and the pole coil outer ventilation passage 4 is connected to the inter-pole radial air passage 6 .

[0054] The outer diameter side surface of the inter-pole partitioning partition plate 1 is in contact with the inner diameter side surface of the magnetic pole coil 2 .

[0055] This embodiment is another preferred implementation mode, which can improve the temperature rise uniformity of the windward side and the leeward side of the magnetic pole coil 2 and has good applicability.

[0056] Example 5 See also Figure 1-Figure 5 , a method for improving the uniformity of temperature rise on the windward and leeward surfaces of a magnetic pole coil, comprising the following steps: S1, installing the inter-pole partition plate 1 between two adjacent magnetic pole coils 2, and fixing the inter-pole partition plate 1 on the magnetic yoke 3, so that a magnetic pole coil outer ventilation duct 4 is formed between the two adjacent magnetic pole coils 2; S2. An inter-pole side middle air duct 5, an inter-pole radial air duct 6 and an inter-pole lateral air duct 7 are arranged on the inter-pole partition plate 1; S3, a plurality of radially penetrating ventilation holes 8 are arranged along the axial direction of the magnetic pole coil 2, radial air holes 10 are arranged on the insulating support plate 9, and circumferential ventilation grooves 12 and radial-to-circumferential air holes 13 are arranged on the iron support plate 11, and the ventilation holes 8, radial air holes 10 and radial-to-circumferential air holes 13 form radial air ducts 14 inside the magnetic pole coil, and the radial air ducts 14 inside the magnetic pole coil are distributed on the leeward side and the windward side of the magnetic pole coil 2; S4, a first gap 16 is provided between the magnetic pole coil 2 and the magnetic pole core 15, a second gap 17 is provided between the iron support plate 11 and the magnetic pole core 15, and the first gap 16 and the second gap 17 are connected to form a radial air duct 18 inside the magnetic pole coil; S5. The cooling air is divided into three cooling air paths through the inter-pole partition plate 1 to cool the magnetic pole coil 2.

[0057] In the above S3, the cross-sectional shape of the ventilation hole 8 is a rectangle.

[0058] In the above S3, the cross-sectional shape of the radial air hole 10 is a rounded rectangle.

[0059] In the above S3, the cross-sectional shape of the radial-to-circumferential air hole 13 is a rounded rectangle.

[0060] In the above S3 , there are multiple circumferential ventilation slots 12 and multiple radial-to-circumferential air holes 13 , and the circumferential ventilation slots 12 and multiple radial-to-circumferential air holes 13 are arranged on the iron support plate 11 at intervals.

[0061] In S4 , the first gap 16 refers to the gap formed between the inner side of the pole coil 2 and the pole core 15 , and the second gap 17 refers to the gap formed between the circumferential ventilation groove 12 on the iron support plate 11 and the pole core 15 .

[0062] In the above S5, the three cooling air paths refer to the cooling air path on the inner side of the magnetic pole coil, the cooling air path inside the magnetic pole coil and the cooling air path on the outer side of the magnetic pole coil.

[0063] The cooling air passage on the inner side of the pole coil comprises an inter-pole lateral air passage 7 and an inner radial air passage 18 of the pole coil. The inner radial air passage 18 of the pole coil is connected to the inter-pole lateral air passage 7.

[0064] The cooling air passage inside the pole coil includes an inter-pole side middle air passage 5 and a pole coil internal radial air passage 14 , and the pole coil internal radial air passage 14 is connected to the inter-pole side middle air passage 5 .

[0065] The cooling air passage on the outer side of the pole coil comprises an inter-pole radial air passage 6 and a pole coil outer ventilation passage 4 , and the pole coil outer ventilation passage 4 is connected to the inter-pole radial air passage 6 .

[0066] The outer diameter side surface of the inter-pole partitioning partition plate 1 is in contact with the inner diameter side surface of the magnetic pole coil 2 .

[0067] More preferably, in S3, the total cross-sectional area of ​​the radial air ducts 14 inside the pole coil distributed on the leeward side of the pole coil 2 is greater than the total cross-sectional area of ​​the radial air ducts 14 inside the pole coil distributed on the windward side of the pole coil 2.

[0068] This embodiment is the best implementation mode. The total cross-sectional area of ​​the radial wind duct 14 inside the pole coil distributed on the leeward side of the pole coil 2 is greater than the total cross-sectional area of ​​the radial wind duct 14 inside the pole coil distributed on the windward side of the pole coil 2. By setting the number of ventilation holes 8, radial wind holes 10 and radial circumferential wind holes 13 distributed on the leeward side of the pole coil 2 to be greater than the number of ventilation holes 8, radial wind holes 10 and radial circumferential wind holes 13 distributed on the windward side of the pole coil 2, or setting the size of the ventilation holes 8, radial wind holes 10 and radial circumferential wind holes 13 distributed on the leeward side of the pole coil 2 to be greater than the size of the ventilation holes 8, radial wind holes 10 and radial circumferential wind holes 13 distributed on the windward side of the pole coil 2, the internal cooling wind volume on the leeward side of the pole coil 2 is greater than the internal cooling wind volume on the windward side of the pole coil 2, thereby achieving a refined distribution of the cooling air volume, and thus being able to effectively improve the temperature rise uniformity of the windward and leeward sides of the pole coil.

[0069] The basic principles of the present invention are as follows: By forming a magnetic pole coil outer ventilation duct 4 between two adjacent magnetic pole coils 2, arranging an inter-pole side middle air duct 5, an inter-pole radial air duct 6 and an inter-pole lateral air duct 7 on the inter-pole partitioning partition plate 1, arranging a plurality of radially penetrating ventilation holes 8 along the axial direction of the magnetic pole coil 2, arranging radial air holes 10 on the insulating support plate 9, arranging circumferential ventilation grooves 12 and radial-to-circumferential air holes 13 on the iron support plate 11, the ventilation holes 8, the radial air holes 10 and the radial-to-circumferential air holes 13 form a magnetic pole coil inner radial air duct 14, By setting a first gap 16 between the pole coil 2 and the pole core 15, and setting a second gap 17 between the iron support plate 11 and the pole core 15, the first gap 16 and the second gap 17 are connected to form a radial air duct 18 inside the pole coil, and the cooling air is divided into three cooling air paths through the inter-pole partition plate 1 to cool the pole coil 2. The distribution of cooling air volume in various parts of the pole coil 2 is more flexible and effective, and the degree of refinement of the air volume distribution is adjustable, which can improve the uniformity of temperature rise on the windward and leeward sides of the pole coil 2.

Claims

1. A method for improving the uniformity of temperature rise on the windward and leeward surfaces of a magnetic pole coil, characterized in that: The following steps are involved: S1, installing an inter-pole partitioning plate (1) between two adjacent magnetic pole coils (2), and fixing the inter-pole partitioning plate (1) on a magnetic yoke (3), so that a magnetic pole coil outer ventilation duct (4) is formed between the two adjacent magnetic pole coils (2); S2. Arranging an inter-pole side central air duct (5), an inter-pole radial air duct (6) and an inter-pole lateral air duct (7) on the inter-pole partitioning plate (1); S3, a plurality of radially penetrating ventilation holes (8) are arranged along the axial direction of the magnetic pole coil (2), radial air holes (10) are arranged on the insulating support plate (9), and circumferential ventilation grooves (12) and radial-to-circumferential air holes (13) are arranged on the iron support plate (11), the ventilation holes (8), the radial air holes (10) and the radial-to-circumferential air holes (13) form radial air ducts (14) inside the magnetic pole coil, and the radial air ducts (14) inside the magnetic pole coil are distributed on the leeward side and the windward side of the magnetic pole coil (2); S4, a first gap (16) is provided between the magnetic pole coil (2) and the magnetic pole core (15), and a second gap (17) is provided between the iron support plate (11) and the magnetic pole core (15), wherein the first gap (16) and the second gap (17) are connected to form a radial air duct (18) inside the magnetic pole coil; S5. The cooling air is divided into three cooling air paths through the inter-pole partition plate (1) to cool the magnetic pole coil (2).

2. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 1, characterized in that: In S3, the cross-sectional shape of the ventilation hole (8) is rectangular, trapezoidal, circular or rounded rectangular.

3. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 1, characterized in that: In S3, the cross-sectional shape of the radial air hole (10) is circular or rounded rectangular.

4. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 1, characterized in that: In S3, the cross-sectional shape of the radial-to-circumferential air hole (13) is circular or rounded rectangular.

5. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 1, characterized in that: In the above-mentioned S3, there are a plurality of circumferential ventilation slots (12) and radial-to-circumferential air holes (13), and the circumferential ventilation slots (12) and radial-to-circumferential air holes (13) are arranged at intervals on the iron support plate (11).

6. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 1, characterized in that: In S4, the first gap (16) refers to the gap formed between the inner side surface of the pole coil (2) and the pole core (15), and the second gap (17) refers to the gap formed between the circumferential ventilation groove (12) on the iron support plate (11) and the pole core (15).

7. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 1, characterized in that: In the above S5, the three cooling air paths refer to the cooling air path on the inner side of the magnetic pole coil, the cooling air path inside the magnetic pole coil and the cooling air path on the outer side of the magnetic pole coil.

8. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 7, characterized in that: The cooling air passage on the inner side of the magnetic pole coil comprises an inter-pole lateral air passage (7) and an inner radial air passage (18) of the magnetic pole coil, and the inner radial air passage (18) of the magnetic pole coil is connected to the inter-pole lateral air passage (7).

9. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 7, characterized in that: The internal cooling air passage of the magnetic pole coil comprises an inter-pole side middle air passage (5) and an internal radial air passage (14) of the magnetic pole coil, and the internal radial air passage (14) of the magnetic pole coil is connected to the inter-pole side middle air passage (5).

10. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 7, characterized in that: The cooling air path on the outer side of the magnetic pole coil comprises an inter-pole radial air duct (6) and a magnetic pole coil outer ventilation duct (4), and the magnetic pole coil outer ventilation duct (4) is connected to the inter-pole radial air duct (6).

11. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 1, characterized in that: The outer diameter side surface of the inter-pole partitioning partition plate (1) is in contact with the inner diameter side surface of the magnetic pole coil (2).

12. A method for improving the temperature rise uniformity of the windward and leeward surfaces of a magnetic pole coil according to claim 1, characterized in that: In S3, the total cross-sectional area of ​​the radial wind duct (14) inside the magnetic pole coil distributed on the leeward side of the magnetic pole coil (2) is greater than the total cross-sectional area of ​​the radial wind duct (14) inside the magnetic pole coil distributed on the windward side of the magnetic pole coil (2).

13. An application for improving the temperature rise of the windward and leeward surfaces of a magnetic pole coil, characterized in that: The method for improving the temperature rise uniformity of the windward and leeward surfaces of the pole coil as claimed in claim 1 is suitable for adjusting the temperature rise uniformity of the windward and leeward surfaces of the pole coil of a hydro-turbine generator.

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