Rotor structure and motor

Abstract

The utility model discloses a rotor structure and a motor, relates to the technical field of motors, and is used for improving the energy utilization rate of the motor. The rotor structure comprises a rotating shaft, a bearing ring, a magnetic pole assembly and a plurality of blades, and the bearing ring surrounds the axis of the rotating shaft and is spaced from the rotating shaft. The magnetic pole assembly is arranged on the outer side of the bearing ring and arranged in the circumferential direction of the bearing ring. The multiple blades are arranged between the bearing ring and the rotating shaft and arranged around the axis of the rotating shaft at intervals, the first ends of the blades are fixed to the rotating shaft, and the second ends of the blades are fixed to the bearing ring. The rotor structure is used for rotating so as to be matched with the stator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to a rotor structure and an electric machine. BACKGROUND

[0002] Electric machines are widely used in daily life as an energy conversion device, and mainly include a rotor structure and a stator structure. Electric machines can be divided into electric motors and generators.

[0003] In the related art, during power generation, a driving mechanism is used to drive the generator to rotate. The driving mechanism includes driving components such as water turbines, steam turbines, or diesel engines, and a transmission connected to the driving components, to cooperate with the driving of the generator.

[0004] However, this driving method adds driving components and a transmission, which results in a large overall size of the driving mechanism and the generator, a complex structure, and a large number of transmission stages, thereby resulting in low energy utilization and low power generation efficiency. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the present application provides a rotor structure and an electric machine to improve the energy utilization of the electric machine.

[0006] The present application is implemented by the following technical solutions.

[0007] In one aspect, the present application provides a rotor structure, which includes a rotating shaft, a bearing ring, a magnetic pole assembly, and a plurality of blades. The bearing ring is arranged around the axis of the rotating shaft and is spaced apart from the rotating shaft. The magnetic pole assembly is arranged on the outer side of the bearing ring and is arranged along the circumference of the bearing ring. The plurality of blades are arranged between the bearing ring and the rotating shaft and are arranged around the axis of the rotating shaft. The first end of the blade is fixed to the rotating shaft, and the second end of the blade is fixed to the bearing ring.

[0008] In the technical solution of the present application, the magnetic pole assembly provides magnetism. When power generation is needed, an external power source can directly act on the blades to drive the rotor structure to rotate as a whole, thereby cooperating with the stator structure to generate electricity. Since the rotor structure in the present application directly includes the blades, the external power source can directly act on the blades, thereby avoiding the use of a large and complex driving mechanism. This not only reduces the size, but also reduces the number of transmission stages, improves the energy utilization, and improves the power generation efficiency.

[0009] In some embodiments of the present application, the plane perpendicular to the axis of the rotating shaft is a first reference plane, and the blade is arranged at an acute angle with the first reference plane.

[0010] In this way, the blade has two oppositely arranged inclined force surfaces, along the axial direction of the rotating shaft, when the water flow impacts the force surface of the blade located at the first side of the bearing ring from the first side, the entire rotor structure can rotate clockwise around the axis of the rotating shaft, when the water flow impacts the force surface of the blade located at the second side of the bearing ring from the second side, the entire rotor structure can rotate counterclockwise around the axis of the rotating shaft. In this way, the blade in the application can be suitable for two different water flow directions of rising tide and falling tide, so as to improve the utilization rate of tidal current energy.

[0011] In some embodiments of the application, along the circumferential direction of the bearing ring, the magnetic pole assembly comprises fixed parts and permanent magnets arranged alternately in sequence, the fixed parts are connected with the bearing ring, and the permanent magnets are clamped between two fixed parts adjacent to the permanent magnets.

[0012] In this way, the permanent magnet can provide magnetism, and the fixed part can be used for clamping and fixing the permanent magnet, so as to realize firm fixing of the permanent magnet, ensure the integrity of the permanent magnet, and ensure that the permanent magnet provides stable magnetism.

[0013] In some embodiments of the application, along the circumferential direction of the bearing ring, the fixed part comprises two oppositely arranged inclined surfaces, along the end of the inclined surface close to the bearing ring, the direction of the end of the inclined surface away from the bearing ring is pointed, and the two adjacent inclined surfaces on different fixed parts extend in the direction of approaching each other.

[0014] In this way, the two adjacent fixed parts form a dovetail groove with a slot range smaller than a bottom range, and the two adjacent inclined surfaces constitute the slot wall surface of the dovetail groove, so as to realize fixing of the permanent magnet, and the fixing mode is simple in structure.

[0015] In some embodiments of the application, the rotor structure further comprises a potting adhesive layer, the potting adhesive layer is coated on the side of the permanent magnet away from the bearing ring, so as to seal the permanent magnet between the two fixed parts adjacent to the permanent magnet.

[0016] In this way, the firmness of the permanent magnet can be ensured.

[0017] In some embodiments of the application, the rotor structure further comprises a potting adhesive layer, the potting adhesive layer is coated on the side of the permanent magnet away from the bearing ring, so as to seal the permanent magnet between the two fixed parts adjacent to the permanent magnet.

[0018] In this way, the firmness of the permanent magnet can be further ensured. Since the permanent magnet is sealed between the two adjacent fixed parts, the water flow can directly pass through the gap between the permanent magnet and the stator structure, direct contact of the water with the permanent magnet can be avoided, and the service life of the permanent magnet is prolonged. On this basis, since the potting adhesive layer has heat conduction performance, when the water flow contacts the potting adhesive layer, the permanent magnet, the bearing ring and other components can be cooled.

[0019] In some embodiments of the present application, the fixing part extends along the axial direction of the rotating shaft; the permanent magnet comprises a plurality of sub-segments, which are arranged along the axial direction of the rotating shaft in sequence.

[0020] By arranging the permanent magnet in a multi-segment structure, the permanent magnet can be conveniently filled between two adjacent fixing parts, and the installation and fixation of the permanent magnet are facilitated.

[0021] In some embodiments of the present application, the rotor structure further comprises a fastener, which penetrates through the fixing part and extends into the bearing ring to connect the fixing part and the bearing ring.

[0022] By fixing the fixing part on the bearing ring through the fastener, the fixing mode of the fastener is relatively reliable.

[0023] In some embodiments of the present application, the rotor structure further comprises a shaft sleeve, which is sleeved and fixed on the rotating shaft, and the first end of the blade is fixedly connected with the shaft sleeve to be fixed on the rotating shaft.

[0024] By fixing the blade on the rotating shaft through the shaft sleeve, the assembly of the rotor structure can be facilitated, and the replacement of the rotating shaft can also be facilitated when the rotating shaft is damaged.

[0025] In some embodiments of the present application, the shaft sleeve comprises a body part and a connecting part, the body part is sleeved and fixed on the rotating shaft, the connecting part is sleeved and fixed on the body part, and the first end of the blade is fixedly connected with the body part to be fixed on the rotating shaft.

[0026] By arranging the shaft sleeve into two parts of the body part and the connecting part, the body part and the connecting part can be arranged in different materials, for example, the body part is arranged in a steel material to ensure the connection stability of the body part and the rotating shaft, and the connecting part is arranged in a cast aluminum alloy material, so that the structure of the connecting part in the cast aluminum alloy material is lighter, thereby reducing the overall weight of the rotor structure on the basis of ensuring the connection strength, so that the rotor structure can play a higher energy efficiency.

[0027] In some embodiments of the present application, the rotor structure further comprises a clamping assembly arranged between the body part and the connecting part, the clamping assembly comprises a plurality of protruding part groups and a plurality of recessed part groups, one of the plurality of protruding part groups and the plurality of recessed part groups is arranged on the body part, and the other of the plurality of protruding part groups and the plurality of recessed part groups is arranged on the connecting part.

[0028] The plurality of protruding part groups are arranged at intervals around the rotating shaft axis, and each protruding part group comprises a plurality of protruding parts arranged at intervals along the rotating shaft axis; the plurality of recessed part groups are arranged at intervals around the rotating shaft axis, and each recessed part group comprises a plurality of recessed parts arranged at intervals along the rotating shaft axis; the plurality of protruding parts and the plurality of recessed parts are arranged correspondingly, and the protruding part extends into the corresponding recessed part.

[0029] In this way, the body part and the connecting part can be clamped together through the plurality of protrusions and the plurality of recesses, so as to realize the relative fixation between the body part and the connecting part, and the fixed firmness can be ensured.

[0030] Another aspect of the present application provides an electric machine, comprising a base, a rotor structure in any of the above embodiments, and a stator structure, wherein the rotation shaft of the rotor structure is rotatably arranged on the base, and the stator structure is arranged around the outside of the rotor structure and fixed on the base.

[0031] Since the electric machine in the present application comprises the rotor structure in any of the above embodiments, the same beneficial effects can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Moreover, like reference numerals designate like parts throughout the several views in the drawings. In the drawings:

[0033] Figure 1 A sectional view of an electric machine provided for some embodiments of the present application;

[0034] Figure 2 A sectional view of a rotor structure provided for some embodiments of the present application;

[0035] Figure 3 A side view of a rotor structure provided for some embodiments of the present application;

[0036] Figure 4 An external structure view of a rotor structure provided for some embodiments of the present application;

[0037] Figure 5 A partial sectional view of a rotor structure provided for some embodiments of the present application;

[0038] Figure 6 Another partial sectional view of a rotor structure provided for some embodiments of the present application;

[0039] Figure 7 Another side view of a rotor structure provided for some embodiments of the present application;

[0040] Figure 8 A partial enlarged view of a rotor structure provided for some embodiments of the present application;

[0041] Figure 9 A sectional view of a clamping assembly for connecting a body part and a connecting part provided for some embodiments of the present application.

[0042] Reference Signs List

[0043] 01 - motor; 1 - rotor structure; 11 - rotating shaft; 12 - bearing ring; 13 - magnetic pole assembly; 131 - fixed part; 131a - inclined surface; 131b - edge covering; 132 - permanent magnet; 14 - vane; a - first reference surface; 15 - potting adhesive layer; 16 - fastener; 17 - shaft sleeve; 171 - body part; 172 - connecting part; 18 - clamping assembly; 181 - protrusion group; 1811 - protrusion; 182 - recess group; 1821 - recess; 2 - stator structure; 3 - base. DETAILED DESCRIPTION

[0044] The embodiments of the present application will be described in detail with reference to the drawings. The following examples are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising," "having," "including," and "containing" used in the specification and the appended claims herein are each intended to encompass the inclusion of one or more elements, and are not intended to be limiting of the application; the use of the term "about" in the specification and the appended claims herein is intended to encompass the inclusion of the term "exactly".

[0046] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0047] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive or alternative embodiments to one another. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined.

[0048] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents the "or" relationship between the front and rear associated objects.

[0049] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0050] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0052] The following is a detailed description of this application.

[0053] As an energy conversion device, an electric motor can convert mechanical energy into electrical energy, or vice versa. With the advancement of technology, the development of electric motors has become increasingly sophisticated.

[0054] Based on this, such as Figure 1 As shown, this application provides an electric motor 01, which mainly operates as a generator 01. The electric motor 01 includes a base 3, a rotor structure 1, and a stator structure 2. The rotating shaft 11 of the rotor structure 1 is rotatably mounted on the base 3. The stator structure 2 is arranged around the outside of the rotor structure 1 and fixed to the base 3.

[0055] With the above configuration, the base 3 can provide support for the rotor structure 1 and the stator structure 2. The rotor structure 1 can rotate relative to the stator structure 2 and the base 3. During the rotation, the stator structure 2 and the rotor structure 1 interact to generate electricity.

[0056] The rotating shaft 11 of the rotor structure 1 can be arranged on the base 3 through a bearing. Specifically, the outer sleeve of the bearing is connected to the base 3, and the rotating shaft 11 passes through the inner hole of the bearing, so that the inner hole of the bearing is connected to the rotating shaft 11, and thus the rotating shaft 11 is rotatably arranged on the base 3.

[0057] In the related art, in order to realize the rotation of the rotor structure 1 so that the rotor structure 1 can cooperate with the stator structure 2 to generate electricity, a driving mechanism is used to drive the rotation of the rotor structure 1. The driving mechanism includes a driving component and a transmission. The rotation of the rotor structure 1 is realized through the cooperation of the driving component and the transmission, and then the rotor structure 1 cooperates with the stator structure 2 to generate electricity. The driving component can be a water turbine, a steam turbine, or a diesel engine, etc. The water turbine can utilize tidal energy, the steam turbine can utilize air energy, and the diesel engine can utilize the combustion energy of oil.

[0058] However, this driving method adds components such as the driving component and the transmission, which causes the overall volume of the driving mechanism and the motor 01 to be large, the transmission level is high, and thus the energy utilization rate is low and the power generation efficiency is low.

[0059] Based on this, as shown in Figure 2 , Figure 3 The rotor structure 1 provided by the application includes a rotating shaft 11, a bearing ring 12, a magnetic pole assembly 13, and a plurality of blades 14. The bearing ring 12 is arranged around the axis of the rotating shaft 11 and is spaced apart from the rotating shaft 11. The magnetic pole assembly 13 is arranged on the outer side of the bearing ring 12 and is arranged along the circumference of the bearing ring 12. The plurality of blades 14 are arranged between the bearing ring 12 and the rotating shaft 11 and are spaced apart around the axis of the rotating shaft 11. The first end of the blade 14 is fixed to the rotating shaft 11, and the second end of the blade 14 is fixed to the bearing ring 12.

[0060] It can be understood that the blade 14 has a force receiving surface. After the force receiving surface is subjected to an external power source, the rotor structure 1 (the magnetic pole assembly 13, the bearing ring 12, the blade 14, and the rotating shaft 11) can be driven to rotate. The magnetic pole assembly 13 provides a magnetic field, and in the process of rotating the rotor structure 1, the magnetic pole assembly 13 can cooperate with the magnetic poles on the stator structure 2 to generate electricity.

[0061] Through the above arrangement, the magnetic pole assembly 13 provides magnetism. When electricity needs to be generated, the external power source can directly act on the blade 14, thereby driving the overall rotor structure 1 to rotate. In the process of rotation, the rotor structure 1 cooperates with the stator structure 2 to generate electricity. Since the rotor structure 1 in the application directly includes the blade 14, the external power source can directly act on the blade 14 of the rotor structure 1. In this way, the use of a large and complex driving mechanism is avoided, which not only reduces the volume but also reduces the transmission level, improves the energy utilization rate, and improves the power generation efficiency.

[0062] It can be understood that the external power source can be water flow, air flow, etc., and can act on the force surface of the blade 14 to drive the overall rotation of the rotor structure 1. The main tidal energy used in the present application is the water flow brought by the rising and falling of the tide, thereby driving the rotation of the rotor structure 1.

[0063] The bearing ring 12 can be a circular ring, so that the friction between the outer surface of the bearing ring 12 and the water flow can be reduced during the rotation of the bearing ring 12, and the energy loss can be reduced.

[0064] In some examples, the plurality of blades 14 are uniformly arranged around the axis of the rotating shaft 11, so that after the potential energy generated by the water flow acts on the plurality of blades 14, the rotor structure 1 can be stably driven to rotate.

[0065] The number of blades 14 can be three, four, five, six or seven, etc. The number of blades 14 should be appropriate. In the case of a large number of blades 14, the low-speed operation characteristics can be better, the torque can be larger, and the self-starting flow rate can be lower. At the same time, the load distribution of the blades 14 in the water flow is more uniform, and it is suitable for lower flow rate water flow power generation. However, if the number of blades 14 is too large, the water power loss will increase, and the energy capture efficiency of the blades 14 will decrease. Therefore, in consideration of the above, when the water flow rate is 2m / s, the tip speed ratio of the blades 14 is selected to be 3, and the number of blades 14 is selected to be 6.

[0066] In some embodiments of the present application, as shown in Figure 4 The plane perpendicular to the axis of the rotating shaft 11 is the first reference plane a, and the blade 14 is arranged at an acute angle with the first reference plane a.

[0067] In this way, the blade 14 has two oppositely arranged inclined force surfaces along the axis of the rotating shaft 11. When the water flow from the first side of the bearing ring 12 impacts the force surface of the blade 14 located on that side, the entire rotor structure 1 can rotate clockwise around the axis of the rotating shaft 11. When the water flow from the second side of the bearing ring 12 impacts the force surface of the blade 14 located on that side, the entire rotor structure 1 can rotate counterclockwise around the axis of the rotating shaft 11. In this way, the blade 14 in the present application can be suitable for two different water flow directions of the rising and falling tides, thereby improving the utilization rate of tidal current energy.

[0068] It can be understood that the inclination trend of the plurality of blades 14 is consistent along the circumference of the bearing ring 12.

[0069] The acute angle between the blade 14 and the first reference plane a can be 30°, 45°, 60°, 70° or 75°, etc., which can be selected according to requirements.

[0070] In some embodiments of the present application, as shown in Figure 5 、 Figure 6 Along the circumferential direction of the bearing ring 12 (the W direction of FIG. 6), the magnetic pole assembly 13 includes fixed parts 131 and permanent magnets 132 arranged alternately in sequence, the fixed parts 131 are connected with the bearing ring 12, and the permanent magnets 132 are clamped between two fixed parts 131 adjacent to the permanent magnets 132.

[0071] In this way, the permanent magnets 132 can provide magnetism, and the fixed parts 131 can be used to clampingly fix the permanent magnets 132, not only achieving firm fixation of the permanent magnets 132, but also ensuring the integrity of the permanent magnets 132 and not causing damage to the permanent magnets 132, ensuring that the permanent magnets 132 provide stable magnetism, thereby ensuring the stability of power generation.

[0072] The material of the fixed part 131 includes steel and the like. The fixed part 131 can be formed by press bonding a plurality of sheet structures arranged in sequence along the axis of the rotating shaft 11 and fixed. In this way, the performance of the motor 01 can be ensured.

[0073] In addition, the material of the permanent magnet 132 can include neodymium iron boron, so that the stability and reliability of the motor 01 can be ensured. The number of permanent magnets 132 is not specifically limited, for example, can be 80, 100, 110, 150 or 200, and is selected according to the radial size of the bearing ring 12 and the volume of the permanent magnet 132, and is also designed according to the rotating speed of the motor 01. The number of permanent magnets 132 is inversely proportional to the rotating speed of the motor 01. When the rotating speed needs to be increased, the number of permanent magnets 132 can be reduced, and when the rotating speed needs to be reduced, the number of permanent magnets 132 can be increased.

[0074] In some embodiments of the present application, as shown in Figure 5 、 Figure 6 Along the circumferential direction of the bearing ring 12, the fixed part 131 includes two inclined surfaces 131a oppositely arranged, along the end of the inclined surface 131a close to the bearing ring 12, pointing to the direction of the end of the inclined surface 131a away from the bearing ring 12, and on different fixed parts 131, the two adjacent inclined surfaces 131a extend in the direction of approaching each other.

[0075] It can be understood that along the circumferential direction of the bearing ring 12, the fixed part 131 includes a first inclined surface 131a and a second inclined surface 131a oppositely arranged, and then on different fixed parts 131, the two adjacent inclined surfaces 131a refer to the second inclined surface 131a on one fixed part 131 and the first inclined surface 131a on the other fixed part 131.

[0076] In this way, the two adjacent fixed portions 131 form a dovetail groove with a groove opening smaller than a groove bottom, wherein the two adjacent inclined surfaces 131a form groove walls of the dovetail groove, so that after the permanent magnet 132 is arranged in the dovetail groove, the small range of the dovetail groove opening can limit the permanent magnet 132 inside the dovetail groove, thereby achieving fixation of the permanent magnet 132. This fixing method has a simple structure and will not damage the permanent magnet 132.

[0077] The inclined surface 131a can be a flat surface or an arc-shaped surface, for example, the inclined surface 131a can be convex or concave towards the permanent magnet 132.

[0078] In some embodiments of the present application, the surface of the permanent magnet 132 opposite to the inclined surface 131a is in contact with the inclined surface 131a. In this way, the permanent magnet 132 can be stably arranged between the two adjacent fixed portions 131, which can ensure the firmness of the permanent magnet 132 and make the permanent magnet 132 provide stable magnetism.

[0079] It can be understood that, along the circumference of the carrier ring 12, the permanent magnet 132 includes opposite first and second surfaces, and the surface of the permanent magnet 132 opposite to the inclined surface 131a is the first and second surfaces. When the inclined surface 131a is a flat surface, the first and second surfaces are also flat surfaces, and when the inclined surface 131a is an arc-shaped surface, the first and second surfaces are also arc-shaped surfaces.

[0080] In some embodiments of the present application, as shown in Figure 6 In this way, when the permanent magnet 132 is loaded into the dovetail groove formed by the two adjacent fixed portions 131, the edge cover 131b can have a protective effect on the permanent magnet 132, avoiding direct contact between the permanent magnet 132 and the carrier ring 12 during pushing, and protecting the permanent magnet 132 and the carrier ring 12.

[0081] In some embodiments of the present application, the fixed portion 131 extends along the axial direction of the rotating shaft 11. The permanent magnet 132 includes a plurality of sub-segments arranged in sequence along the axial direction of the rotating shaft 11.

[0082] By arranging the permanent magnet 132 as a multi-segment structure, the permanent magnet 132 can be easily filled between the two adjacent fixed portions 131, facilitating installation and fixation of the permanent magnet 132. At the same time, during operation of the motor 01, the permanent magnet 132 formed by the plurality of sub-segments can increase the magnetic flux density and reduce the loss of the motor 01, thereby making the motor 01 operate more efficiently, and also reducing noise.

[0083] It can be understood that the length of the fixed portion 131 extending along the axial direction of the rotating shaft 11 should be determined according to the size of the bearing ring 12 in the axial direction of the rotating shaft 11. The length of the fixed portion 131 in the axial direction of the rotating shaft 11 should be slightly smaller than or equal to the length of the bearing ring 12.

[0084] In some examples, in order to further ensure the firmness of the permanent magnet 132, a pressing plate is arranged at both ends of the permanent magnet 132 in the axial direction of the rotating shaft 11, the pressing plate is connected with the bearing ring 12, and the pressing plate abuts against the permanent magnet 132 at the corresponding end. In this way, the permanent magnet 132 can be prevented from moving in the axial direction of the rotating shaft 11, the stability of the fixation of the permanent magnet 132 is ensured, and the permanent magnet 132 can stably provide a magnetic force to ensure that the motor 01 stably generates power.

[0085] The pressing plate can be fixed on the bearing ring 12 by a fastener 16 such as a screw.

[0086] In addition, the pressing plate also has an annular structure around the axis of the rotating shaft 11, so that the permanent magnets 132 in one turn can be fixed.

[0087] In some embodiments of the present application, as shown in Figure 6 The rotor structure 1 further includes a potting layer 15, which is coated on the side of the permanent magnet 132 away from the bearing ring 12, so as to seal the permanent magnet 132 between the two adjacent fixed portions 131.

[0088] In this way, the firmness of the permanent magnet 132 is further ensured. Since the permanent magnet 132 is sealed between the two adjacent fixed portions 131, the water flow can directly pass through the gap between the permanent magnet 132 and the stator structure 2, so that the water can still be prevented from directly contacting the permanent magnet 132, thereby prolonging the service life of the permanent magnet 132. On this basis, since the potting layer 15 has a heat conduction property, when the water flow contacts the potting layer 15, the permanent magnet 132, the bearing ring 12 and other components can also be cooled.

[0089] The material of the potting layer 15 can include epoxy resin potting glue, organic silicon potting glue or polyurethane potting glue, etc.

[0090] In some embodiments of the present application, as shown in Figure 5 The rotor structure 1 further includes a fastener 16, which penetrates the fixed portion 131 and extends into the bearing ring 12 to connect the fixed portion 131 and the bearing ring 12. By fixing the fixed portion 131 on the bearing ring 12 through the fastener 16, the fastening mode of the fastener 16 is more reliable, and the fixed portion 131 and the bearing ring 12 can also be conveniently disassembled and assembled.

[0091] The fastener 16 can be a bolt or a screw, etc.

[0092] In some examples, a receiving groove is formed on the side of the fixing part 131 away from the bearing ring 12, and the fastener 16 comprises a screw, such that the head of the screw is received in the receiving groove, so that the head of the screw can be prevented from protruding outside the fixing part 131, the surface of the fixing part 131 can be ensured to be flat, the friction during rotation of the rotor structure 1 can be reduced, and the energy efficiency of the motor 01 can be improved.

[0093] In some embodiments of the present application, as shown in Figures 7-9 The rotor structure 1 further comprises a shaft sleeve 17, the shaft sleeve 17 is sleeved and fixed on the rotating shaft 11, and the first end of the blade 14 is fixedly connected with the shaft sleeve 17 to be fixed on the rotating shaft 11. The blade 14 is fixed on the rotating shaft 11 through the shaft sleeve 17, so that the blade 14 can be prevented from being directly connected with the rotating shaft 11, unnecessary damage to the rotating shaft 11 can be avoided, and the rotating shaft 11 can be conveniently replaced when the rotating shaft 11 is damaged. In addition, the assembly and disassembly of the rotor structure 1 as a whole can be facilitated.

[0094] On this basis, as shown in Figures 7-9 The shaft sleeve 17 comprises a body part 171 and a connecting part 172, the body part 171 is sleeved and fixed on the rotating shaft 11, and the connecting part 172 is sleeved and fixed on the body part 171, and the first end of the blade 14 is fixedly connected with the body part 171 to be fixed on the rotating shaft 11.

[0095] By providing the shaft sleeve 17 as two parts of the body part 171 and the connecting part 172, the body part 171 and the connecting part 172 can be provided as different materials, for example, the body part 171 is provided as a steel material to ensure the connection stability of the body part 171 and the rotating shaft 11, and the connecting part 172 is provided as an aluminum alloy material, so that the weight of the connecting part 172 is lighter, thereby reducing the overall weight of the rotor structure 1 on the basis of ensuring the connection strength, so that the rotor structure 1 can have higher energy efficiency.

[0096] It can be understood that the body part 171 has a first through hole extending in the axial direction of the rotating shaft 11, the connecting part 172 has a second through hole extending in the axial direction of the rotating shaft 11, the rotating shaft 11 is sleeved in the first through hole of the body part 171, and the body part 171 is sleeved in the second through hole of the connecting part 172. In this way, the body part 171 is sleeved on the rotating shaft 11, and the connecting part 172 is sleeved on the body part 171.

[0097] In some examples, the carrier ring 12, the blade 14 and the connecting portion 172 are an integral structure, and the materials of the carrier ring 12, the blade 14 and the connecting portion 172 are light materials such as glass fiber, carbon fiber or cast aluminum alloy, and the material of the body portion 171 includes steel. In this way, the steel material of the body portion 171 can ensure the connection strength of the carrier ring 12, the blade 14 and the connecting portion 172 with the body portion 171 and the rotating shaft 11, and the overall weight of the carrier ring 12, the blade 14 and the connecting portion 172 adopting light materials is lighter, which can reduce the overall weight of the rotor structure 1. Compared with the case where the carrier ring 12, the blade 14 and the connecting portion 172 all adopt steel materials, the weight is reduced by about 24%. In this way, when the motor 01 is working, the stability of the motor 01 can be improved, the noise can be reduced, and the motor 01 can also have higher energy efficiency.

[0098] In some examples, a key is arranged between the body portion 171 and the rotating shaft 11, the key is fixed with the rotating shaft 11, and a key groove is arranged on the inner wall of the body portion 171, so that the key extends into the key groove, thereby realizing the relative fixation of the body portion 171 and the rotating shaft 11.

[0099] Of course, the body portion 171 can also be sleeved on the rotating shaft 11 in a hot sleeve manner.

[0100] In some embodiments of the present application, as shown in Figure 8 , Figure 9 As shown in FIG. 1, the rotor structure 1 further includes a clamping assembly 18 arranged between the body portion 171 and the connecting portion 172. The clamping assembly 18 includes a plurality of protruding portion groups 181 and a plurality of recessed portion groups 182. One of the plurality of protruding portion groups 181 and the plurality of recessed portion groups 182 is arranged on the body portion 171, and the other of the plurality of protruding portion groups 181 and the plurality of recessed portion groups 182 is arranged on the connecting portion 172.

[0101] The plurality of protruding portion groups 181 are arranged at intervals around the rotating shaft 11 axis. The protruding portion group 181 includes a plurality of protruding portions 1811 arranged at intervals along the rotating shaft 11 axis. The plurality of recessed portion groups 182 are arranged at intervals around the rotating shaft 11 axis. The recessed portion group 182 includes a plurality of recessed portions 1821 arranged at intervals along the rotating shaft 11 axis. The plurality of protruding portions 1811 and the plurality of recessed portions 1821 are arranged correspondingly, and the protruding portion 1811 extends into the corresponding recessed portion 1821.

[0102] In this way, the convex portion 1811 and the concave portion 1821 can be arranged in a manner that the connecting portion 172 is fixed relative to the body portion 171 in the axial direction of the rotating shaft 11 and the circumferential direction of the rotating shaft 11, thereby clamping and fixing the body portion 171 and the connecting portion 172 together. This fixing manner is not only firm, but also will not be affected by the change of materials when the materials of the connecting portion 172 and the body portion 171 are different, and the versatility of the fixing manner is strong.

[0103] The concave portion 1821 can be matched with the convex portion 1811 extending therein, so as to ensure the firmness of the clamping.

[0104] In addition, the shape of the convex portion 1811 can be a square, and the shape of the corresponding concave portion 1821 can be a square groove. Alternatively, the shape of the convex portion 1811 can also be a cylinder, and the shape of the corresponding concave portion 1821 can be a cylindrical groove.

[0105] Of course, in other embodiments, the connecting portion 172 can also be fixed on the body portion 171 by means of fasteners 16 or welding.

[0106] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields by using the content of the specification and drawings of the present application, are also included in the patent protection scope of the present application.

Claims

1. A rotor structure, characterized by, The rotor structure comprises: a rotating shaft; a bearing ring arranged around the axis of the rotating shaft and spaced apart from the rotating shaft; a magnetic pole assembly arranged outside the bearing ring and along the circumference of the bearing ring; and a plurality of blades arranged between the bearing ring and the rotating shaft and spaced apart around the axis of the rotating shaft, the first end of the blade being fixed to the rotating shaft, and the second end of the blade being fixed to the bearing ring.

2. The rotor structure of claim 1, wherein A plane perpendicular to the axis of the rotating shaft is a first reference plane, and the blade is arranged at an acute angle with the first reference plane.

3. A rotor structure according to claim 1 or 2, characterised in that Along the circumference of the bearing ring, the magnetic pole assembly comprises fixed parts and permanent magnets arranged alternately, the fixed parts being connected to the bearing ring, and the permanent magnets being clamped between two adjacent fixed parts.

4. The rotor structure of claim 3, wherein Along the circumference of the bearing ring, the fixed part comprises two opposite inclined surfaces, and the end of the inclined surface close to the bearing ring points to the direction of the end of the inclined surface away from the bearing ring. Different fixed parts, the two adjacent inclined surfaces extend to the direction of approaching each other.

5. The rotor structure of claim 4, wherein The surface of the permanent magnet opposite to the inclined surface is in contact with the inclined surface.

6. The rotor structure of claim 3, wherein The rotor structure further comprises a potting adhesive layer coated on the side of the permanent magnet away from the bearing ring to seal the permanent magnet between two adjacent fixed parts.

7. The rotor structure of claim 3, wherein The fixed part extends along the axis of the rotating shaft; the permanent magnet comprises a plurality of sub-segments arranged along the axis of the rotating shaft.

8. The rotor structure of claim 3, wherein The rotor structure further comprises a fastener passing through the fixed part and extending into the bearing ring to connect the fixed part and the bearing ring.

9. The rotor structure of claim 1 or 2, wherein The rotor structure further comprises a shaft sleeve sleeved and fixed on the rotating shaft, and the first end of the blade is fixedly connected to the shaft sleeve to be fixed on the rotating shaft.

10. The rotor structure of claim 9, wherein The shaft sleeve comprises a body part and a connecting part, the body part is sleeved and fixed on the rotating shaft, and the connecting part is sleeved and fixed on the body part, and the first end of the blade is fixedly connected to the body part to be fixed on the rotating shaft.

11. The rotor structure of claim 10, wherein The rotor structure further comprises a clamping assembly arranged between the body part and the connecting part, the clamping assembly comprises a plurality of protruding part groups and a plurality of recessed part groups, one of the plurality of protruding part groups and the plurality of recessed part groups is arranged on the body part, and the other of the plurality of protruding part groups and the plurality of recessed part groups is arranged on the connecting part. The plurality of protruding part groups are spaced apart around the axis of the rotating shaft, and each protruding part group comprises a plurality of protruding parts spaced apart along the axis of the rotating shaft; the plurality of recessed part groups are spaced apart around the axis of the rotating shaft, and each recessed part group comprises a plurality of recessed parts spaced apart along the axis of the rotating shaft; the plurality of protruding parts and the plurality of recessed parts are correspondingly arranged, and the protruding part extends into the corresponding recessed part.

12. An electric machine characterized by The rotor structure comprises: a base; the rotor structure of any one of claims 1-11, the rotating shaft of the rotor structure being rotatably arranged on the base; A stator structure is disposed around the outside of the rotor structure and is fixed to the base.

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