Rare-earth permanent magnet high-rotating-speed super-power synchronous generator

Abstract

The utility model discloses a rare earth permanent magnet high rotation speed super power synchronous generator, which comprises a casing, a stator is assembled in the casing, a rotor is coaxially assembled in the stator, in the working process, centrifugal force generated by high-speed rotation can be protected by the outer wall of a rotor core, and the rotor core is not damaged. Displacement generated by centrifugal force generated by high-speed rotation on the magnetic shoes is limited, in the rotation process, the two spiral heat dissipation holes in the inner layer and the outer layer can flow in from the outer wall of the stator iron core in a loop mode through airflow driven by the fan blades and flow out to the interior of the rotor core, an outer-in and inner-out circulation loop is formed, internal airflow turbulent flow is reduced, and the efficiency is improved. The high-speed generator effectively solves the problems that when an existing high-speed generator is at a high rotating speed, the heat dissipation effect is common, and when the rotating speed is high, the external centrifugal force of a rotor is too large, so that a magnetic shoe displaces, the magnetic potential of the axis is changed or the radial direction is close to a stator, and the rotating speed is too large. The internal part of the generator is damaged; and the generating efficiency is poor.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet generators, in particular to a rare earth permanent magnet high-speed ultra-high-power synchronous generator. Background Art

[0002] According to the power generation needs of air energy storage projects, high-speed and high-power power generation equipment is required. Not only must it have stable and reliable power generation functions, but it must also adapt to the high speed released by high-pressure gas turbines and the energy conversion characteristics. In this way, the demand for high-speed and high-power density power generation equipment has arisen.

[0003] The existing high-speed generator has a general heat dissipation effect at a relatively high speed. When the speed is high, the centrifugal force outside the rotor is too large, resulting in physical displacement of the magnetic tile and change of the magnetic position of the axis, or the magnetic point is driven outward by the centrifugal force to be radially close to the stator, causing the magnetic field position inside the engine to change, resulting in unstable current generated by the magnetic field cutting coil, and the effective current generated will also be reduced, and even cause internal damage to the generator. In view of the above problems, a rare earth permanent magnet high-speed ultra-high power synchronous generator is proposed. Utility Model Content

[0004] The utility model aims to provide a rare earth permanent magnet high speed ultra-high power synchronous generator to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a rare earth permanent magnet high-speed ultra-high power synchronous generator, comprising a casing, a stator is installed inside the casing, and a rotor is coaxially installed inside the stator;

[0006] The rotor comprises a rotor core, a stacked heat dissipation slot is provided on the inner side of the rotor core, a slot is provided on the outer side of the rotor core, and magnetic tiles are evenly arranged inside the slot;

[0007] The cross section of the slot is in a convex shape;

[0008] The outside of the slot retains an outer wall.

[0009] Preferably, the housing comprises an outer shell, a left cover and a right cover are mounted on both sides of the outer shell, bearing covers are mounted on both sides of the left cover and the right cover respectively, and bearings are arranged inside the bearing covers.

[0010] Preferably, a rotor shaft is coaxially mounted at the center of the rotor core, and a stacked heat dissipation groove is provided on the inner side of the outer wall of the rotor shaft close to the slot.

[0011] Preferably, rotor pressure plates are press-fitted on both sides of the rotor core, and laminated heat dissipation screws are penetrated through the rotor pressure plates and the sides of the rotor core. The laminated heat dissipation screws penetrate the outer wall of the rotor pressure plates and are threaded with nuts.

[0012] Preferably, the stator comprises a stator core, the interior of the stator core is evenly provided with winding grooves, and the interior of the winding grooves is wound with a stator coil.

[0013] Preferably, the outer wall of the stator core is provided with two stacked heat dissipation grooves.

[0014] Preferably, the second laminated heat dissipation grooves are spirally distributed evenly on the outer wall of the stator core.

[0015] Preferably, the rotor core and the stator core are formed by stacking and combining a number of silicon steel sheets.

[0016] Preferably, the stacked heat dissipation slots are in a concentric and evenly distributed shape.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a rare earth permanent magnet high-speed synchronous generator with a rotor having magnetic tiles assembled in slots on the outer wall. During operation, the centrifugal force generated by the high-speed rotation will be protected by the outer wall of the rotor core, limiting the displacement of the magnetic tiles caused by the centrifugal force generated by the high-speed rotation. During rotation, the two heat dissipation holes in the inner and outer layers will be driven by the airflow driven by the fan blades to flow in from the outer wall of the stator core in a loop and flow out to the inside of the rotor core, forming an outside-in and inside-out circulation loop, reducing internal airflow turbulence, improving the smoothness of airflow, and thereby increasing the cooling rate, effectively solving the problem that the existing high-speed generator has a general heat dissipation effect at a higher speed, and when the speed is high, the centrifugal force outside the rotor is too large, resulting in displacement of the magnetic tiles, changes in the magnetic position of the axis or radial proximity to the stator, which will cause internal damage to the generator and poor power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model.

[0019] Figure 2 It is a top view of the utility model.

[0020] Figure 3 It is the front view of the utility model.

[0021] Figure 4 It is the left view of the utility model.

[0022] Figure 5 It is a schematic diagram of the assembly of the utility model.

[0023] Figure 6 This is a schematic diagram of the rotor core structure of the utility model.

[0024] Figure 7 This is the front view of the rotor core of the utility model.

[0025] In the figure: 1. casing; 11. outer shell; 12. right machine cover; 13. left machine cover; 14. fan blades; 15. fan cover; 16. bearing cover; 17. bearing; 2. rotor; 21. rotor core; 22. rotor shaft; 23. laminated heat sink one; 24. slot; 25. magnetic tile; 26. laminated heat sink screw; 27. rotor pressure plate; 3. stator; 31. stator core; 32. winding groove; 33. laminated heat sink two; 34. stator coil. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-7 , the utility model provides a technical solution: a rare earth permanent magnet high speed ultra-high power synchronous generator, comprising a casing 1, a stator 3 is installed inside the casing 1, and a rotor 2 is coaxially installed inside the stator 3;

[0028] The rotor 2 includes a rotor core 21, a laminated heat dissipation slot 23 is provided on the inner side of the rotor core 21, a slot 24 is provided on the outer side of the rotor core 21, and magnetic tiles 25 are evenly installed inside the slot 24;

[0029] The cross section of the slot 24 is in the shape of a convex letter;

[0030] The outside of the slot 24 retains an outer wall.

[0031] The utility model provides a rare earth permanent magnet high-speed synchronous generator with a rotor 2 having an outer wall slot 24 for assembling a magnetic tile 25. During operation, the centrifugal force generated by high-speed rotation will be protected by the outer wall of the rotor core 21, limiting the displacement of the magnetic tile caused by the centrifugal force generated by the high-speed rotation. During the rotation, the two heat dissipation holes in the inner and outer layers will be driven by the airflow driven by the fan blades to flow into the outer wall of the stator core 31 in a loop and flow out to the inside of the rotor core, forming an outside-in and inside-out circulation loop, reducing internal airflow turbulence, improving the smoothness of airflow, and thus improving the cooling rate, effectively solving the problem that the existing high-speed generator has a general heat dissipation effect at a higher speed, and when the speed is high, the external centrifugal force of the rotor is too large, resulting in displacement of the magnetic tile 25, a change in the magnetic position of the axis or radially close to the stator, which will cause internal damage to the generator and poor power generation efficiency.

[0032] Specifically, the housing 1 includes a shell 11, a left cover 13 and a right cover 12 are mounted on both sides of the shell 11, bearing caps 16 are mounted on both sides of the left cover 13 and the right cover 12, and bearings 17 are disposed inside the bearing caps 16;

[0033] The housing 11 includes bases integrally formed at the bottom of both sides. The outer wall of the housing 11 is evenly distributed with heat sink structures. The heat sink structures are combined with the inner wall of the housing 11 to conduct the temperature to the outside of the fixed stator, providing a certain heat dissipation effect.

[0034] The bearing cover 16 is divided into two parts, inner and outer parts, which are snap-fitted onto the inner and outer walls of the two covers (the left cover 13 and the right cover 12). A groove is provided on the inner wall of the bearing cover 16 close to the inner side and away from the fan, and an oil seal is installed inside the groove. The outer wall of the right cover 16 close to the fan side is of a non-oil seal structure, and an air inlet is provided at the outer edge of the right cover 12 corresponding to the stacked heat dissipation groove 2 33.

[0035] When in use, the width of the inner end blade of the fan blade 14 is smaller than the width of the outermost fan blade, so the amount of air disturbed by the outer end of the fan blade 14 is relatively large, and enters the gap between the stator 3 and the housing 11 and the interior of the laminated heat dissipation groove 2 33 through the air inlet. After passing through the cavity between the inner wall of the rotor 2 and the stator 3, the airflow reaches the oil seal position and turns back, and flows to the interior of the laminated heat dissipation groove 1 23 close to the axis of the drill 2. As the rotor 2 drives the laminated heat dissipation groove 1 23 to rotate together, the laminated heat dissipation groove 1 23 has a tangential groove structure at one end close to the oil seal. Therefore, under the restriction of the rotation direction, the airflow will be cut by the tip of the groove structure, and the tip position of the outer wall of the groove structure with a similar blade inclination angle to the outer blade of the fan blade 14 will drive the airflow to flow under pressure inside the laminated heat dissipation groove 23, and then use the centrifugal force generated by the rotation and the tangential thrust to drive the airflow at the axis position from the oil seal direction along the rotor shaft 22 to the fan cover 15, thereby completing the airflow in a cross-shaped loop between the rotor 2 and the stator 3, thereby providing a stable, high-speed flow airflow with less turbulence, thereby improving the heat dissipation effect.

[0036] Specifically, a rotor shaft 22 is coaxially assembled at the center of the rotor core 21, and a laminated heat dissipation groove 23 is opened on the inner side of the outer wall of the rotor shaft 22 near the slot 24. The opening positions of the laminated heat dissipation groove 23 on the outer wall of each laminate have regular deviations, so that after assembly, a concentrically surrounding thread-shaped hole channel can be formed. When rotating, the opening of the spiral near one end of the oil seal will cater to the airflow in the direction of rotation, guide the airflow to provide a flow rate through the cutting pressure and centrifugal force generated by the rotation, and guide the airflow to flow from the inside of the laminated heat dissipation groove 23 to the outside.

[0037] Specifically, rotor pressure plates 27 are press-fitted on both sides of the rotor core 21, and a number of stacking screws 26 are penetrated and installed on the rotor pressure plate 27 and the sides of the rotor core 21. The stacking screws 26 penetrate the outer wall of the rotor pressure plate 27 and are screwed with nuts. The evenly distributed stacking screws 26 press both sides of the drill laminations inward evenly and stably, ensuring stability under centrifugal force and avoiding the occurrence of lamination misalignment.

[0038] The groove structure extending outward from the outermost side of the slot 24 is beneficial to the heat dissipation of the magnetic tile 25, and the reserved groove structure can leave gaps on both sides after the magnetic tile 25 is inserted, which is convenient for later maintenance and the insertion and removal of guiding tools during installation.

[0039] Specifically, the stator 3 includes a stator core 31 , the interior of the stator core 31 is evenly provided with winding slots 32 , the interior of the winding slots 32 is wound with stator coils 34 , and the stator coils are grouped and wrapped with insulating paper and fixedly installed in the interior of the winding slots 32 at intervals.

[0040] Specifically, the outer wall of the stator core 31 is provided with a second stacked heat dissipation slot 33 .

[0041] The stacked heat dissipation groove 2 33 opened on the outside of the stator core 31 is in an inclined circular shape. Since the spiral shape of the airflow stirred and pushed forward by the fan blades 14 is similar to the circular shape of the stacked heat dissipation groove 2 33, the annular airflow stirred and pushed by the outer blades of the fan blades 14 can enter the circular channel and have a tendency to adapt to the downstream, thereby improving the smoothness of the airflow and improving the heat dissipation efficiency.

[0042] Specifically, the second laminated heat dissipation slots 33 are spirally distributed evenly on the outer wall of the stator core 31 .

[0043] Specifically, the rotor core 21 and the stator core 31 are composed of a plurality of stacked silicon steel sheets. The stacked structure composed of the stacked silicon steel sheets is conducive to the opening of circumferential grooves and can be processed by laser cutting or stamping. However, the internal stress must be eliminated by heat treatment before assembly.

[0044] Specifically, the stacked heat dissipation slots 23 are in a concentrically surrounding shape, such as Figure 7 As shown, the stacked heat dissipation slot 23 is a concentric ring shape formed by staggered stacking of a plurality of stacked sheets with different opening positions. The end groove shape of the stacked heat dissipation slot 23 is located on the right side of a single stacked heat dissipation slot 23. Figure 7 For example, at this time, the overall rotation direction of rotor 2 is counterclockwise, and the airflow will be Figure 7 The stacked heat dissipation slot 23 at the frontmost stack position is cut to drive the air flow backward to accelerate the circulation.

[0045] The preferred scheme for the flipping direction of the middle blade and the outer blade of the fan blade 14 is perpendicular to the radial direction of the rotor 2, or the outer blades are made by welding a round rod structure to ensure that the resistance of the fan blade 14 to the airflow near the center position is stable, ensuring the normal outward flow of the hot air flow at the center.

[0046] The utility model is based on limiting and protecting the position of the strong magnetic-based magnetic tile 25 made of a mixture of rare earth materials, which is the main functional component outside the rotor, to ensure that the position of the magnetic tile will not shift under a large centrifugal force, and then by improving the heat dissipation effect, it can finally achieve a working mode that can meet high-speed operation. The working range of the speed can exceed 5000RPM. If a water cooling device is added to the outside of the stator, it can meet an operating speed of nearly 6000RPM, and the energy density can be increased by about 30%.

[0047] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rare earth permanent magnet high speed ultra-high power synchronous generator, comprising a housing (1), characterized in that: The casing (1), the casing (1) is internally equipped with a stator (3), and the stator (3) is internally equipped with a rotor (2) coaxially; The rotor (2) comprises a rotor core (21), a laminated heat dissipation groove (23) is provided on the inner side of the rotor core (21), a slot (24) is provided on the outer side of the rotor core (21), and magnetic tiles (25) are evenly mounted inside the slot (24); The cross section of the slot (24) is in a convex shape; The outside of the slot (24) retains an outer wall.

2. A rare earth permanent magnet high speed ultra-high power synchronous generator according to claim 1, characterized in that: The casing (1) comprises an outer shell (11), and a left cover (13) and a right cover (12) are mounted on both sides of the outer shell (11), and bearing covers (16) are mounted on both sides of the left cover (13) and the right cover (12), respectively, and a bearing (17) is arranged inside the bearing cover (16); a fan blade (14) is mounted on the outer side of the rotor (2), located at the outer side end of the left cover (13) or the right cover (12), and a fan cover (15) is mounted on the outer side of the fan blade (14), located at the outer side of the outer shell (11).

3. A rare earth permanent magnet high speed ultra-high power synchronous generator according to claim 2, characterized in that: A rotor shaft (22) is coaxially mounted at the center of the rotor core (21), and a stacked heat dissipation groove (23) is provided on the outer wall of the rotor shaft (22) near the inner side of the slot (24).

4. The rare earth permanent magnet high speed ultra-high power synchronous generator according to claim 1, characterized in that: The two sides of the rotor core (21) are press-fitted with rotor pressure plates (27), and the sides of the rotor pressure plates (27) and the rotor core (21) are penetrated with a plurality of stacked heat dissipation screws (26), and the stacked heat dissipation screws (26) penetrate the outer wall of the rotor pressure plates (27) and are screwed with nuts.

5. The rare earth permanent magnet high speed ultra-high power synchronous generator according to claim 1, characterized in that: The stator (3) comprises a stator core (31), the interior of the stator core (31) is evenly provided with winding slots (32), and the interior of the winding slots (32) is wound with a stator coil (34).

6. The rare earth permanent magnet high speed ultra-high power synchronous generator according to claim 5, characterized in that: The outer wall of the stator core (31) is provided with a second laminated heat dissipation groove (33).

7. A rare earth permanent magnet high speed ultra-high power synchronous generator according to claim 6, characterized in that: The second laminated heat dissipation grooves (33) are evenly distributed on the outer wall of the stator core (31) in a spiral shape.

8. The rare earth permanent magnet high speed ultra-high power synchronous generator according to claim 5, characterized in that: The rotor core (21) and the stator iron core (31) are composed of a plurality of stacked silicon steel sheets.

9. The rare earth permanent magnet high speed ultra-high power synchronous generator according to claim 3, characterized in that: The stacked heat dissipation slots (23) are in the shape of concentric circles.

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