Comb tooth type magnetic pole fixing structure of high-rotating-speed hydraulic generator

Abstract

The utility model discloses a comb tooth type magnetic pole fixing structure of a high rotating speed hydro-generator, which comprises a magnetic pole unit and a magnet yoke unit, the magnetic pole unit comprises a plurality of magnetic pole sheets, the magnetic pole sheets comprise short magnetic pole punching sheets and a plurality of long magnetic pole punching sheets, the short magnetic pole punching sheets and the long magnetic pole punching sheets are stacked alternately, and the short magnetic pole punching sheets and the long magnetic pole punching sheets are stacked alternately. A comb tooth connecting edge is formed on the magnetic pole unit, a comb tooth butt joint edge is arranged on one side, close to the magnetic pole unit, of the magnetic yoke unit, the comb tooth connecting edge and the comb tooth butt joint edge are connected in an embedded mode, and locking units are connected to the comb tooth connecting edge and the comb tooth butt joint edge. The utility model provides a comb tooth type magnetic pole fixing structure of a high-rotating-speed hydro-generator, which is convenient to install and maintain, can effectively prevent safety accidents caused by insufficient fatigue strength of a rotor material, is more stable and safer in structure, and ensures that the size meets requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to generator technical field especially relates to a high -speed water turbine generator comb tooth formula magnetic pole fixed structure. BACKGROUND

[0002] In the design and manufacturing process of the generator, the fixing mode of the magnetic pole is determined according to the capacity of the generator, the requirement of the magnetic pole intensity when the fly-off speed and the processing equipment condition. The common fixing mode includes using screw, T tail or pigeon tail structure. At present, in large and medium-sized water turbine generator, the magnetic pole usually adopts the fixing structure of T tail (both sides have keyway) or pigeon tail (one side has keyway). Although the T tail structure is larger in the radial dimension (smaller in the circumferential dimension, facilitating the adoption of multiple T tail structures), because its manufacturing process is relatively simple, the stress and the fixing mode are more direct, so it has been widely applied in the domestic.

[0003] For example, the publication number "CN221531102U" discloses "a generator split rotor punching sheet", including the pole body, the pole body top is equipped with the pole shoe, the pole body bottom both sides are equipped with the coil support plate, the pole body bottom is equipped with T tail;The pole shoe is provided with seven damping holes;The pole body is provided with four evenly distributed fixed holes;The pole body is also provided with a mark hole, and the mark hole is outside the fixed hole. But in actual application, when the speed is too fast, the stress borne by the magnetic pole punching sheet increases significantly, which requires increasing the size of the T tail to meet the design requirements. Due to the space size limitation of high-speed unit, the layout of T tail and other connecting devices becomes quite difficult. SUMMARY

[0004] In view of the problem that the size of the T tail cannot meet the layout in the prior art mentioned in the background, the utility model provides a high-speed water turbine generator comb tooth formula magnetic pole fixed structure, which is convenient to install and maintain, can effectively prevent safety accidents caused by insufficient fatigue strength of the rotor material, has more stable and safe structure, and can ensure that the size meets the requirements.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme.

[0006] A high-speed water turbine generator comb tooth formula magnetic pole fixed structure, comprising a magnetic pole unit and a magnetic yoke unit, the magnetic pole unit comprises a plurality of magnetic pole pieces, the magnetic pole piece comprises a short magnetic pole punching sheet and a plurality of long magnetic pole punching sheets, the short magnetic pole punching sheet and the long magnetic pole punching sheet are alternately stacked, a comb tooth connecting edge is formed on the magnetic pole unit, a comb tooth butt joint edge is arranged on the side of the magnetic yoke unit close to the magnetic pole unit, the comb tooth connecting edge and the comb tooth butt joint edge are embeddedly connected, and a locking unit is connected to the comb tooth connecting edge and the comb tooth butt joint edge.

[0007] In this application, the magnetic pole pieces in the magnetic pole unit are configured as short and long magnetic pole pieces of different sizes, and these short and long magnetic pole pieces are stacked alternately with one end aligned. Due to the size difference between the short and long magnetic pole pieces, a comb-like structure is formed at the other end, creating a comb-like connecting edge. A comb-like mating edge is provided on the yoke unit. Alternatively, different sized plates can be used to form the comb-like mating edge on the yoke unit, or a one-piece molded structure can be used. The side of the yoke unit closest to the magnetic pole unit can form a comb tooth mating edge, wherein the comb tooth structure on the comb tooth mating edge and the comb tooth connecting edge is staggered. When the comb tooth mating edge and the comb tooth connecting edge are mated, the magnetic pole unit and the magnetic yoke unit can be seamlessly connected, thereby ensuring the stability of the connection. Moreover, when it is necessary to increase the connection strength, if the density and unit thickness of the comb teeth need to be changed, the overall size of the comb tooth structure will not be changed, thus avoiding the size not meeting the usage requirements. At the same time, there are locking units connected on the comb tooth mating edge and the comb tooth connecting edge, which can make the connection between the comb tooth mating edge and the comb tooth connecting edge tighter and prevent the magnetic pole unit and the magnetic yoke unit from separating.

[0008] Preferably, the comb tooth connecting edge and the comb tooth mating edge are provided with mating holes that can be aligned with each other, and pins are connected to the mating holes. The locking unit consists of the mating holes provided on the comb tooth mating edge and the comb tooth connecting edge, and the pins connected to the mating holes. The pins and the mating holes can prevent radial separation between the magnetic pole unit and the magnetic yoke unit. Since the magnetic pole unit and the magnetic yoke unit can generate axial limiting constraints through the comb tooth connecting edge and the comb tooth mating edge, and since the comb tooth structure can ensure the uniformity of axial constraints, the connection between the entire magnetic pole unit and the magnetic yoke unit can be kept stable.

[0009] Preferably, a plurality of butt holes are provided, and the butt holes are evenly arranged. By providing multiple butt holes and ensuring that they are evenly arranged, the connection between the butt holes and the pins can be made uniform.

[0010] Preferably, the magnetic pole unit includes magnetic pole pressure plates disposed on both sides of the magnetic pole piece, the magnetic pole pressure plates abutting against the magnetic pole piece, and the magnetic pole pressure plates are provided with pressing units. The pressing units drive the magnetic pole pressure plates on both sides to press the magnetic pole piece located in the middle. The magnetic pole pressure plates on both sides of the magnetic pole piece, and the pressing units on the magnetic pole pressure plates, can drive the magnetic pole pressure plates to press towards the middle magnetic pole piece, thereby stabilizing the relative position between the magnetic pole pieces, ensuring the stability of the comb tooth connecting edge, and improving the connection reliability between the comb tooth connecting edge and the comb tooth mating edge.

[0011] Preferably, the magnetic pole piece is provided with a clamping through hole, and the clamping unit is a clamping bolt provided on the clamping through hole, which is set on the magnetic pole pressure plate. Since there are multiple magnetic pole pieces, clamping through holes are provided on each magnetic pole piece to ensure sufficient clamping force between them. The clamping bolts are connected through these holes, thereby connecting the magnetic pole pieces in series. This ensures a tight fit between the magnetic pole pieces and guarantees reliable connection between the comb tooth connecting edge and the comb tooth mating edge.

[0012] Preferably, the magnetic pole plate has stepped holes, and the clamping bolt includes a connecting screw and a clamping nut. The clamping nut is disposed in the stepped hole and connected to the connecting bolt, which passes through the clamping hole. The magnetic pole plate has stepped holes on both sides of the magnetic pole piece, and the stepped holes can accommodate the clamping nut. The connection between the clamping nut and the connecting screw allows the magnetic pole plate to apply a clamping force to the magnetic pole piece.

[0013] Preferably, a plurality of clamping perforations are provided, and each clamping perforation is arranged in a rectangular pattern. Having multiple clamping perforations in a rectangular arrangement is beneficial because the magnetic pole piece is a thin sheet structure. Therefore, if only one clamping perforation is provided, stress concentration would occur, and the remaining areas of the magnetic pole piece without clamping perforations would experience loose connections. Providing multiple clamping perforations in a rectangular arrangement maximizes the uniformity of the connection between the magnetic pole pieces, reduces stress concentration, and ensures that all areas of the magnetic pole piece are clamped effectively.

[0014] Preferably, the magnetic pole piece is provided with a damping hole, and a damping strip is connected inside the damping hole. A notch is formed in the damping hole to create a damping groove. The damping hole on the magnetic pole piece for mounting the damping strip, with a notch forming a damping groove, allows the damping strip to suppress oscillations and improve the overall stability of the device during use.

[0015] Preferably, a damping ring is connected to the side of the magnetic pole plate away from the magnetic pole piece. A connecting bolt is provided on the damping ring, passing through the damping ring and connecting to the magnetic pole plate. A locking pin is provided on the magnetic pole plate, perpendicular to the connecting bolt and passing through the magnetic pole plate, connecting to the connecting bolt. The damping ring connects to the end of the damping strip. To ensure the stability of the damping strip within the damping hole, a damping ring is provided on the magnetic pole plate, positioned on the side of the magnetic pole plate away from the magnetic pole piece. The damping ring is connected to the magnetic pole plate by bolts, where the bolts connecting the damping ring and the magnetic pole plate are connecting bolts. A locking pin is also provided on the magnetic pole plate, with its axis perpendicular to the axis of the connecting bolt. After entering the magnetic pole plate, the locking pin connects to the connecting bolt, locking it in place and preventing loosening, thus ensuring the damping ring is reliably fixed to the magnetic pole plate.

[0016] Preferably, the magnetic pole plate is provided with a winding groove, the wall of the winding groove is provided with an insulating layer, and a magnetic pole coil is disposed in the winding groove. The winding groove on the magnetic pole plate for placing the magnetic pole coil, and the insulating layer within the winding groove, ensure the operational stability of the magnetic pole coil, while the winding groove ensures the structural stability of the stimulation coil.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) The interlocking connection of the comb tooth connecting edge and the comb tooth mating edge facilitates installation and maintenance, effectively prevents safety accidents caused by insufficient fatigue strength of rotor material, makes the structure more stable and safe, and ensures that the dimensions meet the requirements.

[0019] (2) It can ensure the stability and uniformity of the connection between magnetic pole pieces, improve the overall structural strength and connection strength, reduce the probability of loose connection, and improve the stability of device operation. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention.

[0021] Figure 2 This is an exploded sectional view of this utility model.

[0022] Figure 3 This is a side view of the present invention.

[0023] Figure 4 This is a partial cross-sectional view of the magnetic pole pressure plate in this utility model.

[0024] Figure 5 yes Figure 3 A magnified view of a portion of point A in the middle.

[0025] Figure 6 This is a partial cross-sectional view of the damping ring in this utility model.

[0026] In the picture:

[0027] 1. Magnetic pole unit, 11. Magnetic pole piece, 111. Short magnetic pole piece, 112. Long magnetic pole piece, 113. Damping hole, 114. Damping strip, 115. Damping groove, 12. Comb tooth connecting edge, 13. Magnetic pole pressure plate, 131. Stepped hole, 132. Winding groove, 133. Insulation layer, 134. Magnetic pole coil; 2. Magnetic yoke unit, 21. Comb tooth mating edge;

[0028] 3 locking units, 31 through holes, 32 pins;

[0029] 4 extrusion unit, 41 clamping perforation, 42 clamping bolt, 421 connecting screw, 422 clamping nut;

[0030] 5 Damping ring, 51 Connecting bolt, 52 Locking pin. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1:

[0033] like Figure 1 , 2 As shown, a high-speed hydro generator comb-type magnetic pole fixing structure includes a stimulation unit 1 and a magnetic yoke unit 2. The stimulation unit 1 includes a plurality of magnetic pole pieces 11, each of which includes short magnetic pole pieces 111 and a plurality of long magnetic pole pieces 112. The short magnetic pole pieces 111 and the long magnetic pole pieces 112 are stacked alternately. A comb-tooth connecting edge 12 is formed on the stimulation unit 1. A comb-tooth mating edge 21 is provided on the side of the magnetic yoke unit 2 near the stimulation unit 1. The comb-tooth connecting edge 12 and the comb-tooth mating edge 21 are fitted together and connected. A locking unit 3 is connected to the comb-tooth connecting edge 12 and the comb-tooth mating edge 21.

[0034] In the design and manufacturing of generators, the method of fixing the magnetic poles is determined by the generator's capacity, the required magnetic pole strength at runaway speed, and the conditions of the processing equipment. Common fixing methods include using screws, T-tails, or dovetail structures. Currently, in large and medium-sized hydro generators, the magnetic poles typically use T-tail (with keyways on both sides) or dovetail (with a keyway on one side) fixing structures. Although the T-tail structure is larger in radial dimension (smaller in circumferential dimension, facilitating the use of multiple T-tail structures), it is widely used in China due to its relatively simple manufacturing process and more direct stress and fixing method.

[0035] However, when the generator speed reaches 750 rpm or 1000 rpm, the corresponding runaway speed may exceed 1200 rpm or 1500 rpm. In this case, the stress on the pole pieces increases significantly, requiring an increase in the size of the T-tail to meet design requirements. Due to the space constraints of high-speed units, the layout of the T-tail and other connecting devices becomes quite difficult.

[0036] In this embodiment, the magnetic pole pieces 11 in the stimulation unit 1 are configured as short magnetic pole pieces 111 and long magnetic pole pieces 112 of different sizes, and the short magnetic pole pieces 111 and long magnetic pole pieces 112 are stacked alternately, with one end of the short magnetic pole pieces 111 and long magnetic pole pieces 112 aligned. Due to the size difference between the short magnetic pole pieces 111 and long magnetic pole pieces 112, a comb-shaped structure is formed at the other end of the short magnetic pole pieces 111 and long magnetic pole pieces 112, thus forming a comb-tooth connecting edge 12. A comb-tooth mating edge 21 is provided on the magnetic yoke unit 2. The magnetic yoke unit 2 can also be constructed by staggered stacking of plates of different sizes, thereby forming the comb-tooth mating edge 21 on the magnetic yoke unit 2. Alternatively, a single... The integrally formed structure allows for the formation of a comb tooth mating edge 21 on the side of the magnetic yoke unit 2 near the stimulation unit 1. The comb tooth structure on the comb tooth mating edge 21 and the comb tooth connecting edge 12 is staggered. When the comb tooth mating edge 21 and the comb tooth connecting edge 12 are mated, the stimulation unit 1 and the magnetic yoke unit 2 can be seamlessly connected, thereby ensuring the stability of the connection. Furthermore, when it is necessary to increase the connection strength, if the density and unit thickness of the comb teeth need to be changed, the overall size of the comb tooth structure will not be changed, thus avoiding the size not meeting the usage requirements. At the same time, a locking unit 3 is connected to the comb tooth mating edge 21 and the comb tooth connecting edge 12, which makes the connection between the comb tooth mating edge 21 and the comb tooth connecting edge 12 tighter, preventing the stimulation unit 1 and the magnetic yoke unit 2 from separating.

[0037] This embodiment, through the above-described structure, facilitates installation and maintenance by interlocking the comb tooth connecting edge and the comb tooth mating edge. It effectively prevents safety accidents caused by insufficient fatigue strength of the rotor material, resulting in a more stable and safer structure while ensuring that the dimensions meet the requirements.

[0038] Example 2:

[0039] like Figure 1 , 2As shown, a high-speed hydro generator comb-type magnetic pole fixing structure includes a stimulation unit 1 and a magnetic yoke unit 2. The stimulation unit 1 includes a plurality of magnetic pole pieces 11, each of which includes short magnetic pole pieces 111 and a plurality of long magnetic pole pieces 112. The short magnetic pole pieces 111 and the long magnetic pole pieces 112 are stacked alternately. A comb-tooth connecting edge 12 is formed on the stimulation unit 1. A comb-tooth mating edge 21 is provided on the side of the magnetic yoke unit 2 near the stimulation unit 1. The comb-tooth connecting edge 12 and the comb-tooth mating edge 21 are fitted together and connected. A locking unit 3 is connected to the comb-tooth connecting edge 12 and the comb-tooth mating edge 21.

[0040] In this embodiment, the magnetic pole pieces 11 in the stimulation unit 1 are configured as short magnetic pole pieces 111 and long magnetic pole pieces 112 of different sizes, and the short magnetic pole pieces 111 and long magnetic pole pieces 112 are stacked alternately, with one end of the short magnetic pole pieces 111 and long magnetic pole pieces 112 aligned. Due to the size difference between the short magnetic pole pieces 111 and long magnetic pole pieces 112, a comb-shaped structure is formed at the other end of the short magnetic pole pieces 111 and long magnetic pole pieces 112, thus forming a comb-tooth connecting edge 12. A comb-tooth mating edge 21 is provided on the magnetic yoke unit 2. The magnetic yoke unit 2 can also be constructed by staggered stacking of plates of different sizes, thereby forming the comb-tooth mating edge 21 on the magnetic yoke unit 2. Alternatively, a single... The integrally formed structure allows for the formation of a comb tooth mating edge 21 on the side of the magnetic yoke unit 2 near the stimulation unit 1. The comb tooth structure on the comb tooth mating edge 21 and the comb tooth connecting edge 12 is staggered. When the comb tooth mating edge 21 and the comb tooth connecting edge 12 are mated, the stimulation unit 1 and the magnetic yoke unit 2 can be seamlessly connected, thereby ensuring the stability of the connection. Furthermore, when it is necessary to increase the connection strength, if the density and unit thickness of the comb teeth need to be changed, the overall size of the comb tooth structure will not be changed, thus avoiding the size not meeting the usage requirements. At the same time, a locking unit 3 is connected to the comb tooth mating edge 21 and the comb tooth connecting edge 12, which makes the connection between the comb tooth mating edge 21 and the comb tooth connecting edge 12 tighter, preventing the stimulation unit 1 and the magnetic yoke unit 2 from separating.

[0041] like Figure 3 As shown, the comb tooth connecting edge 12 and the comb tooth mating edge 21 are provided with mating holes 31 that can be aligned with each other, and pins 32 are connected to the mating holes 31. The locking unit 3 is the mating hole 31 provided on the comb tooth mating edge 21 and the comb tooth connecting edge 12, and the pin 32 connected to the mating hole 31. The pin 32 and the mating hole 31 can prevent radial separation between the stimulation unit 1 and the magnetic yoke unit 2. Since the stimulation unit 1 and the magnetic yoke unit 2 can generate axial limiting constraints through the comb tooth connecting edge 12 and the comb tooth mating edge 21, and since the comb tooth structure can ensure the uniformity of axial constraints, the connection between the entire stimulation unit 1 and the magnetic yoke unit 2 can be kept stable.

[0042] like Figure 3 As shown, a plurality of through holes 31 are provided, and the through holes 31 are evenly arranged. By providing multiple through holes 31 and arranging them evenly, the connection between the through holes 31 and the pins 32 can be made uniform.

[0043] like Figure 1 , 4 As shown, the stimulation unit 1 includes magnetic pole plates 13 disposed on both sides of the magnetic pole piece 11. The magnetic pole plates 13 abut against the magnetic pole piece 11. A squeezing unit 4 is disposed on the magnetic pole plates 13. The squeezing unit 4 drives the magnetic pole plates 13 on both sides to squeeze the magnetic pole piece 11 located in the middle. Magnetic pole plates 13 are disposed on both sides of the magnetic pole piece 11, and squeezing units 4 are disposed on the magnetic pole plates 13. The squeezing unit 4 can drive the magnetic pole plates 13 to squeeze towards the magnetic pole piece 11 in the middle, thereby stabilizing the relative position between the magnetic pole pieces 11, thus ensuring the stability of the comb tooth connecting edge 12 and improving the connection reliability between the comb tooth connecting edge 12 and the comb tooth mating edge 21.

[0044] like Figure 2 , 3 As shown in Figure 4, the magnetic pole piece 11 is provided with a pressing through hole 41, and the pressing unit 4 is a pressing bolt 42 provided on the pressing through hole 41. The pressing bolt 42 is provided on the magnetic pole pressure plate 13. The pressing through hole 41 is provided on the magnetic pole piece 11. Since there are multiple magnetic pole pieces 11, in order to ensure that there is sufficient pressing force between each magnetic pole piece 11, a pressing through hole 41 is provided on each magnetic pole piece 11, and the pressing bolt 42 is connected through the pressing through hole 41, thereby connecting the magnetic pole pieces 11 in series, ensuring the tight fit between each magnetic pole piece 11, and at the same time ensuring the reliability of the connection between the comb tooth connecting edge 12 and the comb tooth mating edge 21.

[0045] like Figure 4 As shown, the magnetic pole plate 13 has a stepped hole 131. The clamping bolt 42 includes a connecting screw 421 and a clamping nut 422. The clamping nut 422 is disposed in the stepped hole 131 and connected to the connecting bolt 51, which passes through the clamping through hole 41. The magnetic pole plate 13 has a stepped hole 131 and is disposed on both sides of the magnetic pole piece 11. The stepped hole 131 can accommodate the clamping nut 422. Through the connection between the clamping nut 422 and the connecting screw 421, the magnetic pole plate 13 can apply a clamping force to the magnetic pole piece 11.

[0046] like Figure 3As shown, several clamping holes 41 are provided, and each clamping hole 41 is arranged in a rectangular shape. Since the magnetic pole piece 11 is a thin sheet structure, if only one clamping hole 41 is provided, it will lead to stress concentration and cause the remaining areas of the magnetic pole piece 11 without clamping holes 41 to have loose connections. However, by providing multiple clamping holes 41 in a rectangular arrangement, the uniformity of connection between the magnetic pole pieces 11 can be maximized, stress concentration can be reduced, and all areas on the magnetic pole piece 11 can be clamped effectively.

[0047] like Figure 5 As shown, a damping hole 113 is provided on the magnetic pole piece 11, and a damping strip 114 is connected inside the damping hole 113. A notch is provided on the damping hole 113 to form a damping groove 115. The damping hole 113 on the magnetic pole piece 11 is provided for mounting the damping strip 114, and the notch is provided on the damping hole 113, which is the damping groove 115. The damping strip 114 can suppress oscillations and improve the overall stability of the device during use.

[0048] like Figure 6 As shown, a damping ring 5 is connected to the side of the magnetic pole plate 13 away from the magnetic pole piece 11. A connecting bolt 51 is provided on the damping ring 5. The connecting bolt 51 passes through the damping ring 5 and is connected to the magnetic pole plate 13. A locking pin 52 is provided on the magnetic pole plate 13. The locking pin 52 is perpendicular to the connecting bolt 51 and passes through the magnetic pole plate 13 and is connected to the connecting bolt 51. The damping ring 5 is connected to the end of the damping strip 114. To ensure the stability of the damping strip 114 within the damping hole 113, a damping ring 5 is provided on the magnetic pole plate 13. The damping ring 5 is located on the side of the magnetic pole plate 13 away from the magnetic pole piece 11. The damping ring 5 is connected to the magnetic pole plate 13 by bolts. The bolts used to connect the damping ring 5 to the magnetic pole plate 13 are connecting bolts 51. A locking pin 52 is also provided on the magnetic pole plate 13. The axis of the locking pin 52 is perpendicular to the axis of the connecting bolt 51. After the locking pin 52 is inserted into the magnetic pole plate 13, it can connect with the connecting bolt 51, thereby locking the connecting bolt 51 and preventing it from loosening. This ensures that the damping ring 5 can be reliably fixed on the magnetic pole plate 13.

[0049] like Figure 4 As shown, a winding groove 132 is provided on the magnetic pole pressure plate 13, and an insulating layer 133 is provided on the wall of the winding groove 132. A magnetic pole coil 134 is provided inside the winding groove 132. The winding groove 132 for placing the magnetic pole coil 134 is provided on the magnetic pole pressure plate 13, and the insulating layer 133 is provided inside the winding groove 132. The insulating layer 133 can ensure the working stability of the magnetic pole coil 134, and the winding groove 132 can ensure the structural stability of the stimulation coil.

[0050] In this embodiment, the interlocking connection of the comb tooth connecting edge 12 and the comb tooth mating edge 21 facilitates installation and maintenance, effectively prevents safety accidents caused by insufficient fatigue strength of rotor materials, makes the structure more stable and safe, and ensures that the dimensions meet the requirements. It can also ensure the connection stability and uniformity between the magnetic pole pieces 11, improve the overall structural strength and connection strength, reduce the probability of loose connection, and improve the stability of device operation.

Claims

1. A comb-type magnetic pole fixing structure for a high-speed hydro-generator, characterized in that, It includes a magnetic pole unit and a magnetic yoke unit. The magnetic pole unit includes a plurality of magnetic pole pieces, each magnetic pole piece including short magnetic pole pieces and a plurality of long magnetic pole pieces. The short magnetic pole pieces and long magnetic pole pieces are stacked alternately. A comb tooth connecting edge is formed on the magnetic pole unit. A comb tooth mating edge is provided on the side of the magnetic yoke unit near the magnetic pole unit. The comb tooth connecting edge and the comb tooth mating edge are fitted together. A locking unit is connected to the comb tooth connecting edge and the comb tooth mating edge.

2. The high-speed hydro-generator comb-type magnetic pole fixing structure according to claim 1, characterized in that, The connecting edge and mating edge of the comb teeth are provided with mating holes that can be aligned with each other, and pins are connected to the mating holes.

3. The high-speed hydro-generator comb-type magnetic pole fixing structure according to claim 2, characterized in that, The mating holes are provided in a plurality of manner, and the mating holes are evenly arranged.

4. A comb-type magnetic pole fixing structure for a high-speed hydro-generator according to any one of claims 1-3, characterized in that, The magnetic pole unit includes magnetic pole pressure plates disposed on both sides of the magnetic pole sheet. The magnetic pole pressure plates abut against the magnetic pole sheet. A pressing unit is disposed on the magnetic pole pressure plates. The pressing unit drives the magnetic pole pressure plates on both sides to press the magnetic pole sheet located in the middle.

5. The high-speed hydro-generator comb-type magnetic pole fixing structure according to claim 4, characterized in that, The magnetic pole piece is provided with a pressing hole, and the pressing unit is a pressing bolt provided on the pressing hole. The pressing bolt is provided on the magnetic pole pressure plate.

6. The high-speed hydro-generator comb-type magnetic pole fixing structure according to claim 5, characterized in that, The magnetic pole plate is provided with a stepped hole, and the clamping bolt includes a connecting screw and a clamping nut. The clamping nut is disposed in the stepped hole and connected to the connecting bolt, and the connecting bolt passes through the clamping hole.

7. The high-speed hydro-generator comb-type magnetic pole fixing structure according to claim 5, characterized in that, The compression holes are provided in a plurality of manner, and each compression hole is arranged in a rectangular shape.

8. The high-speed hydro-generator comb-type magnetic pole fixing structure according to claim 4, characterized in that, The magnetic pole piece is provided with a damping hole, and a damping strip is connected inside the damping hole. A notch is provided on the damping hole to form a damping groove.

9. A comb-type magnetic pole fixing structure for a high-speed hydro-generator according to claim 8, characterized in that, A damping ring is connected to the side of the magnetic pole plate away from the magnetic pole piece. A connecting bolt is provided on the damping ring. The connecting bolt passes through the damping ring and is connected to the magnetic pole plate. A locking pin is provided on the magnetic pole plate. The locking pin is perpendicular to the connecting bolt and passes through the magnetic pole plate and is connected to the connecting bolt. The damping ring is connected to the end of the damping strip.

10. A comb-type magnetic pole fixing structure for a high-speed hydro-generator according to claim 4, characterized in that, The magnetic pole pressure plate is provided with a winding groove, the wall of the winding groove is provided with an insulating layer, and a magnetic pole coil is provided inside the winding groove.

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