Permanent magnet wind driven generator rotor and wind driven generator

Abstract

The utility model relates to the field of wind power generation, in particular to a permanent magnet wind driven generator rotor and a wind driven generator, which comprise a support, a stator arranged at the top end of the support, a permanent magnet wind driven generator rotor arranged inside the stator and fan blades in transmission connection with the rotor. The permanent magnet wind driven generator rotor comprises a rotor shaft, an iron core fixedly installed on the peripheral surface of the rotor shaft, a permanent magnet fixedly installed on the iron core, a pre-tightening assembly used for fixing the permanent magnet, an adjusting assembly used for adjusting the installation position of the permanent magnet, and a pressing plate assembly used for axially limiting the permanent magnet. According to the utility model, the permanent magnets are inserted into the mounting grooves of the rotor from the side of the iron core, so that the permanent magnets can be mounted more simply and conveniently; and meanwhile, the permanent magnets are limited and fixed by using the magnet pressing plates, so that the stability of the permanent magnets mounted on the wind driven generator rotor can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wind power generation especially a kind of permanent magnet wind driven generator rotor and wind driven generator. BACKGROUND

[0002] Permanent magnet wind driven generator is a kind of equipment for converting wind energy into electric energy, its characteristics are using permanent magnet as magnetic field source, when wind wheel is driven to rotate by wind force, wind wheel drives the rotor of permanent magnet to rotate, to generate induced current in stator coil.

[0003] At present, the Chinese utility model patent application with publication number CN203911609U and publication date October 29, 2014 proposes a wind power generator rotor, including machine shaft, iron core and permanent magnet steel sheet, machine shaft is one body forged manganese steel alloy shaft, iron core is formed by silicon steel sheet cold rolling and sticking, the periphery of iron core is provided with a plurality of pole slots, permanent magnet steel sheet is arranged in pole slot, permanent magnet steel sheet is fixedly connected with iron core by resin bolt, there is gap sheet between permanent magnet steel sheet and iron core axis direction, gap sheet periphery is provided with rubber pad, rubber pad has interval, iron core connecting column is arranged in interval, the periphery of pole slot is provided with clamping tooth and holds permanent magnet steel sheet.

[0004] In use, permanent magnet steel sheet is arranged in the pole slot of the periphery of iron core, and permanent magnet steel sheet is clamped and fixed by the clamping tooth in the periphery of pole slot.

[0005] In view of the above related technology, since clamping is arranged in the periphery of pole slot, permanent magnet steel sheet cannot be installed from the side of pole slot when installing, and permanent magnet steel sheet can only be inserted into pole slot along the axial direction of iron core from one end of pole slot, so that installation is more inconvenient. UTILITY MODEL CONTENTS

[0006] In order to improve the convenient degree of permanent magnet installation in iron core, the utility model provides a kind of permanent magnet wind driven generator rotor and wind driven generator.

[0007] First aspect: the utility model provides a kind of permanent magnet wind driven generator rotor, adopt following technical scheme:

[0008] The permanent magnet wind power generator rotor comprises a rotor shaft, an iron core and permanent magnets, the iron core is arranged outside the rotor shaft, the permanent magnets are installed on the iron core, a plurality of first grooves and second grooves corresponding to the first grooves are arranged in a ring shape on the outer circumferential surface of the iron core, the first grooves and the second grooves are arranged alternately, the permanent magnets are installed in the first grooves, and a pre-tightening assembly is installed in the second grooves; the pre-tightening assembly comprises a magnet pressing plate and an adjusting assembly installed on the magnet pressing plate, the magnet pressing plate comprises a connecting portion and an abutting portion, the connecting portion is installed in the second groove, and the abutting portion is arranged at one end of the connecting portion away from the second groove and is pressed against one side of the permanent magnet close to the outer circumferential surface of the iron core.

[0009] By adopting the technical scheme, when the rotor is assembled, the iron core is first installed on the rotor shaft and fixed with the rotor shaft, then the permanent magnets are installed in the first grooves along the axial direction of the iron core or the radial direction of the iron core, the permanent magnets are more conveniently installed in the first grooves along the radial direction of the iron core, after all the permanent magnets are installed in the corresponding first grooves, finally, the magnet pressing plate of the pre-tightening assembly is installed in the second groove, so that the permanent magnets installed in the first grooves are fixed; when the magnet pressing plate is installed in the second groove, the connecting portion is installed in the second groove, and the abutting portion is located outside the second groove and limits and fixes the permanent magnets installed in the first grooves. In this way, when the permanent magnets are installed in the iron core, the permanent magnets can be installed along the radial direction of the iron core, the way of installing the permanent magnets on the iron core is simpler, the magnet pressing plate is used to abut against the permanent magnets outside to limit the permanent magnets, the installation of the permanent magnets and the iron core is more stable and firm, and the stability of the rotor during rotation is improved.

[0010] Optionally, the second groove is a dovetail groove, and the connecting portion is arranged in a dovetail shape matched with the shape of the second groove.

[0011] By adopting the technical scheme, when the rotor rotates, the magnet pressing plate is subjected to the action of centrifugal force and tends to move away from the center of the rotor shaft, at this time, the dovetail-shaped connecting portion abuts against the dovetail groove, so as to prevent the magnet pressing plate from moving away from the center of the rotor shaft, and at the same time, the installation of the connecting portion and the second groove is more compact, and the stability of the connection between the magnet pressing plate and the iron core is improved.

[0012] Optionally, a plurality of adjusting holes are formed in the abutting portion and arranged along the axial direction of the iron core; the adjusting assembly comprises a plurality of adjusting nuts and a pressing strip, the adjusting nuts are installed in the adjusting holes one by one, and the pressing strip is arranged between the permanent magnets and the abutting portion, and the adjusting nuts abut against one side of the pressing strip away from the permanent magnets.

[0013] Due to the installation gap caused by the size and installation position difference of the permanent magnet and the magnet pressure plate during the production or installation in the first slot and the second slot, the permanent magnet and the magnet pressure plate will slightly shake during the rotation of the rotor, thereby causing the unstable rotation of the rotor. By adopting the technical scheme, a plurality of adjusting holes are arranged on the abutment portion of the magnet pressure plate when the magnet pressure plate is installed, and an adjusting nut is correspondingly arranged in each adjusting hole. A pressing strip is arranged on the side of the adjusting nut close to the iron core. After the magnet pressure plate is installed on the iron core, the pressing strip is located between the abutment portion and the permanent magnet. By screwing the adjusting nut, the pressing strip can be moved towards the iron core and tightly pressed on the end face of the permanent magnet away from the iron core. At this time, the magnet pressure plate moves away from the iron core under the action of the pressing strip, and the dovetail type connecting portion of the magnet pressure plate abuts in the dovetail groove, so that the fixation of the magnet pressure plate and the iron core is more stable and firm, and the permanent magnet is tightly attached to the first slot under the abutting of the pressing strip. In this way, the stability of the installation of the permanent magnet and the pre-tightening assembly in the first slot and the second slot is increased, the probability of the movement of the permanent magnet and the pre-tightening assembly relative to the iron core is reduced, and the stability of the rotation of the rotor is improved.

[0014] Optionally, the rotor further comprises a pressure plate assembly, the pressure plate assembly comprises an end pressure plate and a tail pressure plate, the end pressure plate and the tail pressure plate are arranged at two ends of the iron core respectively, and the end pressure plate and the tail pressure plate are fixedly connected to the rotor shaft.

[0015] By adopting the above technical scheme, the end pressure plate and the tail pressure plate can axially limit the permanent magnet and the magnet pressure plate installed in the first slot and the second slot at two ends of the iron core, thereby reducing the shaking of the permanent magnet and the magnet pressure plate after being installed in the iron core, further increasing the stability of the installation of the permanent magnet and the magnet pressure plate, and increasing the stability of the rotation of the rotor.

[0016] Optionally, a through hole is arranged on the end pressure plate, the tail pressure plate and the magnet pressure plate in a corresponding position, and a fastening bolt is arranged in the through hole in a one-to-one correspondence.

[0017] By adopting the above technical scheme, the fastening bolt connects the end pressure plate, the tail pressure plate and the magnet pressure plate together to form an integral whole, thereby increasing the stability. Since the end pressure plate and the tail pressure plate are fixedly arranged on the rotor shaft, the torque is transmitted to the end pressure plate and the tail pressure plate during the rotation of the rotor shaft. The end pressure plate and the tail pressure plate transmit the torque to the magnet pressure plate through the fastening bolt, and then the magnet pressure plate transmits the torque to the outside of the iron core, thereby playing a role of dispersing the stress of the connection position of the iron core and the rotor shaft, and further increasing the service life of the rotor.

[0018] Optionally, a ventilation hole is further arranged on the corresponding position of the end pressure plate, the tail pressure plate and the iron core.

[0019] By adopting the technical scheme, when the rotor rotates, the airflow can enter the inside of the iron core from one end of the ventilation hole and take away the heat in the iron core, thereby reducing the magnetic permeability of the iron core and the permanent magnet, and reducing the efficiency reduction of the generator.

[0020] Optionally, the end plate is provided with a plurality of blades at one end away from the tail plate, and the plurality of blades are arranged circumferentially along the end plate.

[0021] By adopting the technical scheme, the airflow flow rate at one end of the iron core can be accelerated by the blades, and the airflow can flow faster in the ventilation hole, thereby helping the iron core to cool better.

[0022] Optionally, the rotor shaft is provided with a key groove, the end plate is provided with a spline sleeve at one end away from the tail plate, the spline sleeve is arranged in cooperation with the key groove, and the spline sleeve is fixedly connected with the end plate.

[0023] By adopting the technical scheme, the key groove and the spline sleeve can transmit torque, which can transmit the rotation of the rotor shaft to the end plate, reduce the stress concentration at the connecting part of the rotor shaft and the end plate, and prolong the service life of the rotor.

[0024] Second aspect: the utility model provides a kind of wind driven generator using the permanent magnet wind driven generator rotor as described in first aspect, using the following technical scheme:

[0025] A kind of wind driven generator using the permanent magnet wind driven generator rotor as described in first aspect, including support, fan blade, stator and the permanent magnet wind driven generator rotor as described in first aspect, the stator is fixedly installed on the support, the permanent magnet wind driven generator rotor is rotatably installed in the stator, and the fan blade is drivingly connected with the permanent magnet wind driven generator rotor.

[0026] By adopting the technical scheme, when the fan blade rotates under the push of wind force, the fan blade will drive the permanent magnet wind driven generator rotor to rotate, and the permanent magnet wind driven generator rotor will generate current in the stator when rotating in the stator, and the arrangement of the permanent magnet wind driven generator rotor facilitates the installation of the permanent magnet in the permanent magnet wind driven generator rotor, effectively reducing the manufacturing cost of the permanent magnet wind driven generator rotor.

[0027] In summary, the utility model includes at least one of the following beneficial technical effects:

[0028] 1. By setting the first slot for installing permanent magnet and the second slot for installing magnet pressing plate on the rotor of wind driven generator, the permanent magnet can be installed on the rotor of wind driven generator from the side of the rotor along the radial direction of the rotor when installing the permanent magnet, and then the magnet pressing plate is fixed in the second slot of the rotor to fix the permanent magnet from the outside of the permanent magnet using the magnet pressing plate, which can install the permanent magnet on the rotor of wind driven generator from the side to simplify the installation mode of the permanent magnet, and can increase the stability of the permanent magnet installed on the rotor of wind driven generator by limiting and fixing the permanent magnet using the magnet pressing plate.

[0029] 2. The adjusting assembly is installed on the magnet pressing plate, which can be adjusted when the permanent magnet installed in the first slot shakes due to the error in processing or installation, and the permanent magnet and the magnet pressing plate are fixed on the core of wind driven generator respectively to further increase the stability of the rotor of wind driven generator.

[0030] 3. The end pressing plate and the tail pressing plate are installed on the two sides of the core of rotor of wind driven generator respectively to limit the permanent magnet and the magnet pressing plate installed on the core in the axial direction, which can reduce the shaking of the permanent magnet and the magnet pressing plate on the core in the axial direction of the core to increase the stability of the rotor of wind driven generator.

[0031] 4. The end pressing plate, the tail pressing plate and the magnet pressing plate are connected by the fastening bolt, and the end pressing plate and the rotor shaft are connected by the spline sleeve, so that the rotor shaft can transmit the torque to the end pressing plate, and the end pressing plate transmits the torque to the magnet pressing plate by the fastening bolt, which can transmit part of the torque to the magnet pressing plate when the rotor rotates, disperses the stress of the connection part of the rotor shaft and the core, and prolongs the service life of the rotor of wind driven generator. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the overall structure of the embodiment of the utility model front view schematic diagram;

[0033] Figure 2 is the overall structure of the embodiment of the utility model explosion schematic diagram;

[0034] Figure 3 is the side structure of the embodiment of the utility model schematic diagram;

[0035] Figure 4 is Figure 2 the sectional view schematic diagram of A-A in it;

[0036] Figure 5 is Figure 4 the local enlarged schematic diagram of I part in it.

[0037] Explanation of reference signs: 1, rotor shaft; 11, keyway; 2, iron core; 21, first slot; 22, second slot; 3, permanent magnet; 4, pre-tightening assembly; 41, magnet pressing plate; 42, connecting portion; 43, abutting portion; 44, adjusting hole; 5, adjusting assembly; 51, adjusting nut; 52, pressing strip; 6, pressing plate assembly; 61, end pressing plate; 62, tail pressing plate; 63, through hole; 64, fastening bolt; 65, ventilation hole; 66, blade; 7, spline sleeve. DETAILED DESCRIPTION

[0038] The following will be described in detail Figures 1 to 5 The utility model is further described in detail.

[0039] In the prior art, when assembling the permanent magnet wind driven generator rotor, the permanent magnet 3 is generally fixed and installed in two forms, one is to open an installation slot in the iron core 2 along the depth direction of the iron core 2, and the permanent magnet 3 is arranged in the installation slot along the depth direction of the installation slot, this installation method has an attractive force between the permanent magnet 3 and the iron core 2, and a small installation gap is left between the permanent magnet and the installation slot, so that a large resistance exists during insertion, resulting in difficult installation; the other is to directly bond the permanent magnet 3 on the surface of the iron core 2, and the permanent magnet 3 and the iron core 2 are fixed by installing bolts at the corresponding positions, this installation method is prone to cause the performance of the adhesive to decrease when the rotor is heated or the bolt connection to be loose when vibrating, thereby affecting the normal operation of the generator rotor, therefore, the present application combines the surface fixing and mechanical fixing methods to improve the above problems.

[0040] The utility model discloses a wind driven generator. Refer to Figures 1 to 3 A wind driven generator mainly includes a support, a stator installed at the top end of the support, a permanent magnet wind driven generator rotor installed in the stator, and a fan blade in transmission connection with the rotor, wherein the stator is fixedly installed at the top end of the support, support structures are arranged at both ends of the stator, the permanent magnet wind driven generator rotor is rotatably installed on the support structures and rotates in the rotor, a gear box is installed on the output shaft of the permanent magnet wind driven generator rotor, and the output shaft of the permanent magnet wind driven generator rotor is in transmission connection with the fan blade through the gear box, when the wind drives the fan blade to rotate, the fan blade drives the permanent magnet wind driven generator rotor to rotate, the permanent magnet wind driven generator rotor rotates in the stator and generates an electric current in the stator, thereby converting the wind power into electric power.

[0041] Refer to Figure 3 and Figure 4The permanent magnet wind power generator rotor comprises a rotor shaft 1, an iron core 2 fixedly installed on the outer circumferential surface of the rotor shaft 1, a permanent magnet 3 fixedly installed on the iron core 2, a pre-tightening assembly 4 for fixing the permanent magnet 3, an adjusting assembly 5 for adjusting the installation position of the permanent magnet 3, and a pressing plate assembly 6 for axially limiting the permanent magnet 3, wherein the iron core 2 is made of a plurality of silicon steel sheets of the same size stacked together, and the iron core 2 is fixed on the outer circumferential surface of the rotor shaft 1 by welding; a plurality of first grooves 21 and a plurality of second grooves 22 are uniformly arranged on the outer circumferential surface of the iron core 2, wherein the first grooves 21 and the second grooves 22 are arranged alternately, the cross section of the first groove 21 is rectangular, and the cross section of the second groove 22 is dovetail-shaped; during installation, the permanent magnet 3 is inserted into the first groove 21 from the side of the iron core 2 along the radial direction of the rotor shaft 1, and the permanent magnet 3 and the inner circumferential surface of the first groove 21 are bonded by an adhesive.

[0042] With reference to Figures 3 to 5 The pre-tightening assembly 4 is a plurality of magnet pressing plates 41 installed in the second grooves 22, the magnet pressing plate 41 comprises a connecting portion 42 and an abutting portion 43, wherein the cross section of the connecting portion 42 is dovetail-shaped to match the shape of the second groove 22, the abutting portion 43 is an arc-shaped structure connected to the smaller end surface of the connecting portion 42, and the inner end surface of the arc-shaped structure of the abutting portion 43 has the same curvature as the outer circumferential surface of the iron core 2, so that when the abutting portion 43 is attached to the outer circumferential surface of the iron core 2, the inner circumferential surface of the abutting portion 43 can better fit the outer circumferential surface of the iron core 2; a plurality of adjusting holes 44 are arranged on the abutting portion 43, and the adjusting holes 44 are arranged along the axial direction of the rotor shaft 1; during installation of the magnet pressing plate 41, the connecting portion 42 of the magnet pressing plate 41 is inserted into the second groove 22 along the axial direction of the iron core 2, at this time, the dovetail-shaped connecting portion 42 matches the dovetail groove, and the positions of the adjusting holes 44 correspond to the positions of the permanent magnets 3 in the radial direction of the iron core 2.

[0043] With reference to Figure 5, the adjusting assembly 5 comprises an adjusting nut 51 corresponding to the adjusting hole 44 and a pressing strip 52 corresponding to the magnet pressing plate 41, wherein the adjusting nut 51 is installed in the adjusting hole 44 one by one, and the adjusting nut 51 can move along the radial direction of the iron core 2 when rotating in the adjusting hole 44, the pressing strip 52 is arranged between the abutting portion 43 and the permanent magnet 3, and the end of the pressing strip 52 away from the permanent magnet 3 abuts on the end face of the adjusting nut 51 close to the permanent magnet 3; during installation, first, the adjusting nut 51 is installed in the adjusting hole 44 one by one, second, the pressing strip 52 is inserted between the magnet pressing plate 41 and the permanent magnet 3 after the magnet pressing plate 41 is inserted into the second groove 22, and the pressing strip 52 is installed between the abutting portion 43 on both sides of the magnet pressing plate 41 and the permanent magnet 3, and finally the pressing strip 52 is tightly pressed against the permanent magnet 3 by rotating the adjusting nut 51; when the permanent magnet 3 is tightly pressed by rotating the adjusting nut 51, the magnet pressing plate 41 moves away from the iron core 2 and is gradually tightly pressed under the cooperation of the dovetail-shaped connecting portion 42 and the second groove 22, the permanent magnet 3 is tightly pressed in the first groove 21 under the tight pressing of the adjusting nut 51, and the pressing strip 52 can reduce the probability of direct contact and scratching of the adjusting nut 51 with the permanent magnet 3 and play a shock-absorbing role.

[0044] With reference to Figure 2 and Figure 3 , the pressing plate assembly 6 comprises an end pressing plate 61, a tail pressing plate 62, a fastening bolt 64 and a blade 66, wherein the end pressing plate 61 and the tail pressing plate 62 are structurally identical, the end pressing plate 61 is arranged at one end of the rotor shaft 1 and is provided with a connecting flange, the tail pressing plate 62 is fixedly connected to the connecting flange of the rotor shaft 1 by bolts, the other end of the rotor shaft 1 is provided with a key groove 11, the key sleeve 7 cooperates with the key groove 11, the key sleeve 7 is sleeved on the outer circumferential surface of the rotor shaft 1 and is circumferentially limited by the inner circumferential surface and the key groove 11 of the rotor shaft 1, the end pressing plate 61 is fixedly connected with the key sleeve 7 by bolts, the corresponding positions of the end pressing plate 61, the tail pressing plate 62 and the connecting portion 42 of the magnet pressing plate 41 are provided with through holes 63, the fastening bolt 64 is inserted into the through holes 63, and the end pressing plate 61, the tail pressing plate 62 and the magnet pressing plate 41 are fastened and connected by installing nuts on both ends of the fastening bolt 64, the corresponding positions of the connecting portion 42 of the end pressing plate 61, the tail pressing plate 62 and the magnet pressing plate 41 are provided with ventilation holes 65, the positions of the ventilation holes 65 on the iron core 2 are located on both sides of the first groove 21, and the end face of the end pressing plate 61 away from the tail pressing plate 62 is provided with the blade 66; when the wind turbine rotor rotates, the blade 66 can drive airflow to flow on one side of the end pressing plate 61, so that the air flows from the ventilation hole 65 close to the tail pressing plate 62 to the end close to the end pressing plate 61, thereby taking away the heat near the iron core 2 and the permanent magnet 3, and playing a cooling role.

[0045] The implementation principle of the permanent magnet wind driven generator rotor and the wind driven generator is as follows: when the wind driven generator rotor is assembled, first, the tail pressing plate 62 is fixedly connected on the connecting flange of the rotor shaft 1 through bolts, second, the iron core 2 is sleeved outside the rotor shaft 1 and is fixed with the rotor shaft 1 and the iron core 2 through welding or riveting, third, the permanent magnet 3 is installed in the first slot 21 from the side of the iron core 2 along the radial direction of the iron core 2 and is fixed through an adhesive, and the magnet pressing plate 41 is inserted into the second slot 22 from one end of the second slot 22 along the depth direction of the second slot 22, fourth, the pressing strip 52 is inserted between the abutting portion 43 and the permanent magnet 3 and adjusts and fixes the permanent magnet 3 and the magnet pressing plate 41 through the adjusting assembly 5, fifth, the end pressing plate 61 is installed at one end of the iron core 2 away from the tail pressing plate 62, the end pressing plate 61, the magnet pressing plate 41 and the tail pressing plate 62 are fixedly connected through the fastening bolt 64 inserted in the corresponding perforation 63, and finally, the spline sleeve 7 is sleeved on one end of the rotor shaft 1 close to the end pressing plate 61 and is matched and installed with the key groove 11 to form the circumferential limiting, the spline sleeve 7 and the end pressing plate 61 are fixedly connected through bolts, the installation of the permanent magnet wind driven generator rotor is completed, the installed permanent magnet wind driven generator rotor is rotatably installed in the stator above the wind driven generator support, and the permanent magnet wind driven generator rotor and the fan blades of the wind driven generator are connected through the gear box, so that the permanent magnet wind driven generator rotor and the wind driven generator are driven.

[0046] In summary, the application installs the permanent magnet 3 in the iron core 2 along the radial direction of the iron core 2 from the side, then installs the magnet pressing plate 41 on the iron core 2 to abut against the permanent magnet 3 outside to limit and fix the permanent magnet 3, on the one hand, the permanent magnet 3 is inserted in the first slot 21 of the rotor iron core 2 of the wind driven generator from the side, so that the installation of the permanent magnet 3 is more convenient; on the other hand, the magnet pressing plate 41 is used to limit and fix the permanent magnet 3, so that the stability of the permanent magnet 3 installed on the rotor of the wind driven generator is increased; the adjusting assembly 5 is installed on the magnet pressing plate 41, so that the permanent magnet 3 and the magnet pressing plate 41 can be adjusted when there is an installation gap and shaking, the permanent magnet 3 and the magnet pressing plate 41 are fixed on the iron core 2 of the wind driven generator respectively, and the stability of the rotor of the wind driven generator is further increased; the end pressing plate 61 and the tail pressing plate 62 are installed on the two sides of the iron core 2 respectively, the permanent magnet 3 and the magnet pressing plate 41 installed on the iron core 2 are axially limited, the shaking of the permanent magnet 3 and the magnet pressing plate 41 on the iron core 2 along the axial direction of the iron core 2 is reduced, and the stability of the rotor of the wind driven generator is increased; the end pressing plate 61, the tail pressing plate 62 and the magnet pressing plate 41 are connected by the fastening bolt 64, the end pressing plate 61 and the rotor shaft 1 are connected by the spline sleeve 7, so that the rotor shaft 1 can transmit the torque to the end pressing plate 61, the end pressing plate 61 transmits the torque to the magnet pressing plate 41 by the fastening bolt 64, part of the torque can be transmitted to the magnet pressing plate 41 when the rotor rotates, the stress at the connection part 42 of the rotor shaft 1 and the iron core 2 is dispersed, and the service life of the rotor of the wind driven generator is improved.

[0047] The above are preferred embodiments of the utility model, and do not limit the protection scope of the utility model, so that: equivalent changes made according to the structure, shape and principle of the utility model should be covered in the protection scope of the utility model.

Claims

1. A permanent magnet wind turbine rotor, comprising a rotor shaft (1), a core (2) and a permanent magnet (3), the core (2) is arranged outside the rotor shaft (1), and the permanent magnet (3) is installed on the core (2), characterized in that, a plurality of first grooves (21) and second grooves (22) corresponding to the first grooves (21) are arranged on the outer circumferential surface of the core (2), the first grooves (21) and the second grooves (22) are arranged alternately, the permanent magnet (3) is installed in the first groove (21), and a pre-tightening assembly (4) is installed in the second groove (22); the pre-tightening assembly (4) comprises a magnet pressing plate (41) and an adjusting assembly (5) installed on the magnet pressing plate (41), the magnet pressing plate (41) comprises a connecting part (42) and an abutting part (43), the connecting part (42) is installed in the second groove (22), the abutting part (43) is arranged at one end of the connecting part (42) away from the second groove (22), and the abutting part (43) is pressed against one side of the permanent magnet (3) close to the outer circumferential surface of the core (2).

2. A permanent magnet wind generator rotor according to claim 1, wherein: The second groove (22) is a dovetail groove, and the connecting part (42) is arranged in a dovetail shape matching the shape of the second groove (22).

3. A permanent magnet wind generator rotor according to claim 1, wherein: A plurality of adjusting holes (44) are formed in the abutting part (43), and the adjusting holes (44) are arranged along the axial direction of the core (2). The adjusting assembly (5) comprises a plurality of adjusting nuts (51) and a pressing strip (52), the adjusting nuts (51) are installed in the adjusting holes (44) one by one, the pressing strip (52) is arranged between the permanent magnet (3) and the abutting part (43), and the adjusting nuts (51) are abutted on one side of the pressing strip (52) away from the permanent magnet (3).

4. A permanent magnet wind generator rotor according to any one of claims 1 to 3, wherein: Further comprising a pressing plate assembly (6), the pressing plate assembly (6) comprises an end pressing plate (61) and a tail pressing plate (62), the end pressing plate (61) and the tail pressing plate (62) are arranged at both ends of the core (2) respectively, and the end pressing plate (61) and the tail pressing plate (62) are fixedly connected to the rotor shaft (1).

5. A permanent magnet wind generator rotor according to claim 4, wherein: Corresponding through holes (63) are arranged on the end pressing plate (61), the tail pressing plate (62) and the magnet pressing plate (41), and fastening bolts (64) are installed in the through holes (63) one by one.

6. A permanent magnet wind generator rotor according to claim 4, wherein: Corresponding ventilation holes (65) are further arranged on the end pressing plate (61), the tail pressing plate (62) and the core (2).

7. A permanent magnet wind generator rotor according to claim 4, wherein: A plurality of blades (66) are arranged on one end of the end pressing plate (61) away from the tail pressing plate (62), and the blades (66) are arranged circumferentially on the end pressing plate (61).

8. A permanent magnet wind generator rotor according to claim 4, wherein: A key groove (11) is arranged on the rotor shaft (1), a spline sleeve (7) is arranged on one end of the end pressing plate (61) away from the tail pressing plate (62), the spline sleeve (7) is arranged in cooperation with the key groove (11), and the spline sleeve (7) is fixedly connected to the end pressing plate (61).

9. A wind power generator using the permanent-magnet wind power generator rotor according to any one of claims 1 to 8, comprising a support, a fan blade, a stator, and the permanent-magnet wind power generator rotor according to any one of claims 1 to 8, the stator being fixedly installed on the support, characterized in that, The permanent magnet wind power generator rotor is rotatably installed inside the stator, and the fan blade is in transmission connection with the permanent magnet wind power generator rotor.

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