Rotor structure and generator

Abstract

The invention relates to the technical field of motors, and provides a rotor structure and a generator. The rotor structure comprises a rotor core, a rotor winding and a shielding assembly. The rotor winding is embedded in the rotor iron core and is provided with a first extending section extending out of the rotor iron core from the axial direction of the rotor iron core. The shielding assembly is connected to the rotor core and / or the first extension section. The shielding assembly is arranged to be of a revolving body structure and is coaxial with the rotor iron core. And in the radial direction of the rotor iron core, the projection of the shielding assembly at least covers the first extension section. Along the axial direction of the rotor core, the projection of the shielding assembly at least covers the first fastener and the first extension section of the rotor core. Therefore, the motor has the advantages of low ventilation loss and low wind noise during operation, the efficiency of the motor can be improved, and noise pollution is improved.

Description

Technical Field

[0001] The present application relates to the technical field of motors, and particularly to a rotor structure and a generator. Background Art

[0002] In the related art, when the generator rotor runs at high speed, the ventilation loss and wind noise will increase significantly and exceed the electromagnetic loss and electromagnetic mechanical noise, respectively becoming the dominant factors of motor loss and noise, affecting the motor efficiency and increasing the environmental noise pollution. The main reason for the noise generated by the motor rotor is that the end of the rotor winding extends out of the outer edge of the rotor, and the end face of the rotor core is fixed by bolts. A large amount of ventilation loss and sharp wind noise will be generated during the rotation of the protruding structures such as the extended part of the rotor winding and the bolts. Summary of the Invention

[0003] An embodiment of the present application provides a rotor structure and a generator. By using an occlusion component with a rotary body structure to occlude the first extended segment of the rotor winding and the first fastener for fixing the rotor core, the outer peripheral surface and the end face of the rotor structure are of a rotary body structure, which can effectively eliminate the air vortices generated by the sweeping of the protruding structures on the rotor surface, and reduce the ventilation loss and wind noise.

[0004] To achieve the above object, according to the first aspect of the present application, a rotor structure is provided, including: A rotor core; A rotor winding, embedded in the rotor core and having a first extended segment extending axially from the rotor core; An occlusion component, connected to the rotor core and / or the first extended segment, the occlusion component is set as a rotary body structure and is coaxial with the rotor core. Wherein, along the radial direction of the rotor core, the projection of the occlusion component at least covers the first extended segment, and along the axial direction of the rotor core, the projection of the occlusion component at least covers the first fastener of the rotor core and the first extended segment.

[0005] Optionally, the occlusion component includes: A first occlusion member, connected to the first extended segment, and along the radial direction of the rotor core, the projection of the first occlusion member at least covers the first extended segment; A second occlusion member, connected to the rotor core, and along the axial direction of the rotor core, the projection of the second occlusion member at least covers the first fastener and the first extended segment.

[0006] Optionally, the rotor structure further includes: A crimping member, connected to the rotor core through the first fastener; The second occlusion member includes: A centrifugal fan is connected to a side of the crimping member away from the rotor core; Wherein, along the axial direction of the rotor core, the projection of the centrifugal fan at least covers the first fastener.

[0007] Optionally, the second shielding member further includes: A cover plate connected between the centrifugal fan and the first shielding member; Wherein, along the axial direction of the rotor core, the projection of the cover plate at least covers the first protruding section.

[0008] According to a second aspect of the present application, a generator is provided, based on the aforementioned rotor structure, including: A stator structure; Wherein, the stator structure is sleeved outside the rotor structure.

[0009] Optionally, the generator further includes: A machine pit with a hollow interior; A machine base disposed in the machine pit, and both the stator structure and the rotor structure are disposed on the machine base; A frame disposed in the machine pit, the frame is spaced apart from the machine base, the frame is connected with a wind baffle extending towards the machine base direction, the wind baffle is spaced apart from the machine base and forms a first ventilation gap; The stator structure includes: A stator core sleeved outside the rotor core; A stator winding embedded in the stator core and having a second protruding section extending axially from the stator core, a second ventilation gap is formed in the second protruding section, and the second ventilation gap communicates with the first ventilation gap.

[0010] Optionally, the shielding assembly includes a centrifugal fan and a retaining ring, the centrifugal fan is connected to the rotor core, the retaining ring is sleeved on the first protruding section, wherein, a cover plate is connected between the centrifugal fan and the retaining ring, and the centrifugal fan, the cover plate and the retaining ring enclose to form a first air duct, and the first air duct communicates with the second ventilation gap; A third ventilation gap is formed in the first protruding section, and the third ventilation gap communicates with the first air duct.

[0011] Optionally, the rotor structure includes a first tooth pressing plate, a fourth ventilation gap is formed between the first tooth pressing plate and the rotor core, and the fourth ventilation gap communicates with the third ventilation gap; A second air duct is formed in the machine base, and the second air duct communicates with the fourth ventilation gap and the first ventilation gap.

[0012] Optionally, a cooler is connected to the machine base, and the cooler is located between the second air duct and the first ventilation gap.

[0013] Optionally, the rotor structure further includes: A central body support with a third air duct formed inside, and the third air duct communicates with the second ventilation gap; The rotor core includes at least two stacked rotor core laminations, and each adjacent two rotor core laminations are spaced apart to form a fifth ventilation gap, and the fifth ventilation gap communicates with the third air duct; The stator core includes at least two stacked stator core laminations, and each adjacent two stator core laminations are spaced apart to form a sixth ventilation gap, and the sixth ventilation gap communicates with the fifth ventilation gap and the second air duct.

[0014] Optionally, the rotor winding further has a lead wire, and the lead wire passes through the centrifugal fan and is fixed to the centrifugal fan by a second fastener.

[0015] Optionally, the stator structure further includes a second tooth pressing plate, and a seventh ventilation gap is formed between the second tooth pressing plate and the stator core. The seventh ventilation gap communicates between the fourth ventilation gap and the second air duct. Among them, the second protruding section passes through the second tooth pressing plate and is connected with a seal, and the seal is configured to block the air flow from flowing back to the second ventilation gap.

[0016] In the rotor structure and the generator of the embodiments of the present application, the first protruding section of the rotor winding and the first fastener for fixing the rotor core are shielded by the shielding assembly in a rotary body structure, so that the outer peripheral surface and the end surface of the rotor structure form a complete rotary body structure, and the shapes of the outer peripheral surface and the end surface of the rotor in contact with the air are smooth, which can effectively eliminate the air vortices and medium-high pressure pulsations generated when the protruding structures on the rotor surface are swept, and reduce the ventilation loss and wind noise. Therefore, the motor can operate with the advantages of low ventilation loss and low wind noise during operation, which can improve the motor efficiency and reduce the noise pollution.

[0017] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] To more fully understand the present application and its beneficial effects, the following description will be made in conjunction with the accompanying drawings, where the same reference numerals in the following description denote the same parts.

[0020] Figure 1 is a cross-sectional view of the generator provided in an exemplary embodiment of the present application; Figure 2 is one of the partial cross-sectional views of the generator provided in an exemplary embodiment of the present application; Figure 3 is the second of the partial cross-sectional views of the generator provided in an exemplary embodiment of the present application; Figure 4 is the air duct diagram inside the generator provided in an exemplary embodiment of the present application.

[0021] Explanation of reference numerals: 11, rotor core; 111, rotor core lamination; 121, first extended section; 122, lead wire; 123, second fastener; 13, crimping part; 131, first tooth pressure plate; 132, retaining ring; 134, seal; 14, first fastener; 15, central body support; 151, connecting plate; 21, stator core; 211, stator core lamination; 221, second extended section; 22, second tooth pressure plate; 3, shielding assembly; 31, first shielding part; 32, second shielding part; 321, centrifugal fan; 322, cover plate; 33, shielding plate; 4, pit; 5, machine base; 6, frame; 61, wind deflector; 71, first ventilation gap; 72, second ventilation gap; 73, third ventilation gap; 74, fourth ventilation gap; 75, fifth ventilation gap; 76, sixth ventilation gap; 77, seventh ventilation gap; 81, first air duct; 82, second air duct; 83, third air duct; 9, cooler. Detailed implementation manners

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0023] According to the first aspect of the present application, with reference to Figures 1 to 4, the present application provides a rotor structure. The rotor structure includes a rotor core 11, a rotor winding, and a shielding assembly 3. The rotor winding is embedded in the rotor core 11. The rotor winding has a first protruding section 121 that axially protrudes from the rotor core 11. The shielding assembly 3 is connected to the rotor core 11 and / or the first protruding section 121. The shielding assembly 3 is arranged as a rotary body structure and is coaxial with the rotor core 11. Wherein, along the radial direction of the rotor core 11, the projection of the shielding assembly 3 at least covers the first protruding section 121. Along the axial direction of the rotor core 11, the projection of the shielding assembly 3 at least covers the first fastener 14 of the rotor core 11 and the first protruding section 121.

[0024] In the embodiment of the present application, the first protruding section 121 of the rotor winding and the first fastener 14 for fixing the rotor core 11 are shielded by the shielding assembly 3 in the form of a rotary body structure, so that the outer peripheral surface and the end surface of the rotor structure form a complete rotary body structure. The shapes of the outer peripheral surface and the end surface of the rotor in contact with air are smooth, which can effectively eliminate the air vortices and medium-high frequency pressure pulsations generated when the protruding structures on the rotor surface are swept, and reduce the ventilation loss and wind noise. Therefore, the motor can have the advantages of low ventilation loss and low wind noise during operation, which can improve the motor efficiency and reduce the noise pollution.

[0025] It can be understood that the rotor core 11 itself is a rotary body structure, and the rotor core 11 has an outer peripheral surface and an end surface. On the end surface of the rotor core 11, there are a protruding first fastener 14 and a first protruding section 121. The first protruding section 121 is used to realize the output of the electric energy of the rotor winding. Wherein, the first protruding section 121 extends a certain length along the axial direction of the rotor core 11. In this embodiment, the projection of the shielding assembly 3 in the radial direction of the rotor core 11 covers the first protruding section 121, and the projection of the shielding assembly 3 in the axial direction of the rotor core 11 covers the first fastener 14 and the first protruding section 121 of the rotor core 11, so that the outer peripheral surface and the end surface of the rotor structure both form a complete rotary body structure. During the rotation of the rotor structure, the shapes of its end surface and outer peripheral surface in contact with air are smooth, which can effectively eliminate the air vortices and medium-high frequency pressure pulsations generated when the protruding structures on the rotor surface are swept, and reduce the ventilation loss and wind noise.

[0026] It should be noted that the shielding assembly 3 is arranged coaxially with the rotor core 11 to ensure that the shielding assembly 3 does not have an eccentric jitter phenomenon when rotating with the rotor core 11, and to ensure the stability of the rotation of the rotor structure. To ensure that after the shielding assembly 3 is connected to the rotor core 11 and / or the first protruding section 121, the end surface and the outer peripheral surface of the rotor structure both form a complete rotary body structure, the shielding assembly 3 is located at a position away from the axial direction of the rotor core 11 of the first protruding section 121, and the shielding assembly 3 is located outside the end surface of the rotor core 11.

[0027] In some embodiments, shielding assemblies 3 are connected to the outer sides of both end faces of the rotor core 11. The two shielding assemblies 3 are symmetrically arranged on the rotor core 11.

[0028] In some embodiments, the projection of the shielding assembly 3 along the radial direction of the rotor core 11 covers the first protruding section 121 and extends beyond a certain distance to ensure that the shielding assembly 3 completely shields the first protruding section 121. The projection of the shielding assembly 3 along the axial direction of the rotor core 11 covers the rotor core 11 and the first protruding section 121 to ensure that the shielding assembly 3 completely shields the first fastener 14 and the first protruding section 121 mounted on the rotor core 11.

[0029] The rotor core 11 in the embodiments of the present application includes at least two stacked rotor core laminations 111, and the at least two stacked rotor core laminations 111 are connected by the first fastener 14.

[0030] As Figure 2 shown, in some embodiments, the shielding assembly 3 includes a first shielding member 31 and a second shielding member 32. The first shielding member 31 is connected to the first protruding section 121. Along the radial direction of the rotor core 11, the projection of the first shielding member 31 at least covers the first protruding section 121. The second shielding member 32 is connected to the rotor core 11. Along the axial direction of the rotor core 11, the projection of the second shielding member 32 at least covers the first fastener 14 and the first protruding section 121.

[0031] It can be understood that the first shielding member 31, as a radial shielding member, its projection at least covers the first protruding section 121. The second shielding member 32, as an axial shielding member, its projection at least covers the first fastener 14 and the first protruding section 121. Among them, both the first shielding member 31 and the second shielding member 32 are arranged as rotational body structures. The first shielding member 31 can be used as the outer peripheral surface of the end of the rotor structure, and the second shielding member 32 can be used as the end face of the end of the rotor structure. During the rotation of the rotor structure, the shapes of the surfaces of the first shielding member 31 and the second shielding member 32 in contact with the air are smooth, which can effectively eliminate the air vortices and medium and high-frequency pressure pulsations generated when the protruding structures on the rotor surface are swept, and reduce the ventilation loss and wind noise.

[0032] In some embodiments, the first shielding member 31 includes a retaining ring. The retaining ring is sleeved on the first protruding section 121. The retaining ring extends along the axial direction of the rotor core 11. Among them, along the radial direction of the rotor core 11, the projection of the retaining ring at least covers the first protruding section 121.

[0033] It can be understood that the retaining ring is arranged in a circular ring shape and is coaxially arranged with the rotor core 11. The first protruding section 121 is usually also arranged in a circular ring shape, and the retaining ring is sleeved on the outer ring of the first protruding section 121. Since the outer surface of the first protruding section 121 is a non-rotary body structure, air vortices and medium-high frequency pressure pulsations will be generated during rotation, resulting in relatively large ventilation losses and wind noise. After the retaining ring is sleeved on the outer ring of the first protruding section 121, since the retaining ring is a rotary body structure, the retaining ring can be used as the outer peripheral surface of the end of the rotor structure, and no air vortices and medium-high frequency pressure pulsations will be generated during its rotation, thereby reducing ventilation losses and wind noise.

[0034] It should be noted that along the axial direction of the rotor core 11, the length of the retaining ring is slightly greater than the length of the first protruding section 121 to ensure that the retaining ring can completely cover the first protruding section 121. Among them, the retaining ring can be thermally sleeved on the first protruding section 121.

[0035] As Figure 1 shown, in some embodiments, the rotor structure further includes a crimping member 13. The crimping member 13 is connected to the rotor core 11 through a first fastener 14. The second shielding member 32 includes a centrifugal fan 321. The centrifugal fan 321 is connected to the side of the crimping member 13 away from the rotor core 11. Among them, along the axial direction of the rotor core 11, the projection of the centrifugal fan 321 at least covers the first fastener 14.

[0036] It can be understood that two crimping members 13 are provided, and the two crimping members 13 are respectively arranged on the end faces on the opposite sides of the rotor core 11. The two crimping members 13 cooperate with the first fastener 14 to sandwich and fix the rotor core 11 between the two crimping members 13. Among them, the centrifugal fan 321 is connected to the crimping member 13 so that the centrifugal fan 321 serves as the end face of the rotor structure. Since the centrifugal fan 321 is a rotary body structure and the projection of the centrifugal fan 321 at least covers the first fastener 14, no air vortices and medium-high frequency pressure pulsations will be generated during its rotation, thereby reducing ventilation losses and wind noise.

[0037] It should be noted that during the rotation of the centrifugal fan 321 with the rotor core 11, the centrifugal fan 321 can also generate an air flow, and the air flow can circulate in the generator to realize air cooling of components such as the rotor structure and the stator structure.

[0038] Please continue to refer to Figure 2 , in some embodiments, the second shielding member 32 further includes a cover plate 322. The cover plate 322 is connected between the centrifugal fan 321 and the retaining ring. Among them, along the axial direction of the rotor core 11, the projection of the cover plate 322 at least covers the first protruding section 121.

[0039] It can be understood that the centrifugal fan 321 is spaced apart from the retaining ring, and the two are connected through the cover plate 322. On the one hand, the cover plate 322 can seal the gap between the centrifugal fan 321 and the retaining ring to ensure that the air flow flows along the preset direction without phenomena such as backflow and turbulent flow. On the other hand, it can block the first protruding section 121. The centrifugal fan 321 and the cover plate 322 together serve as the end face of the rotor structure, and the two form a completely rotating body structure, which will not generate air vortices and medium- and high-frequency pressure pulsations during rotation, thereby reducing ventilation losses and wind noise.

[0040] In some embodiments, the cover plate 322 is welded to the centrifugal fan 321 and the retaining ring.

[0041] Please continue to refer to Figure 2 , in some embodiments, the crimping member 13 includes a first toothed pressing plate 131 and a retaining ring 132. The first toothed pressing plate 131 is connected to the rotor core 11. The retaining ring 132 is disposed on the side of the first toothed pressing plate 131 away from the rotor core 11. Among them, the retaining ring 132, the first toothed pressing plate 131 and the rotor core 11 are connected by a first fastener 14.

[0042] It can be understood that the first toothed pressing plate 131 cooperating with the retaining ring 132 can realize reliable fixation of the rotor core 11. The retaining ring 132 is disposed on the side of the first toothed pressing plate 131 away from the rotor core 11 to connect the centrifugal fan 321 by using the retaining ring 132.

[0043] In some embodiments, the shielding assembly 3 is a non-magnetic shielding assembly. Thus, the problem of induced heating of the shielding assembly 3 at the end magnetic field can be avoided. For example, the retaining ring is a non-magnetic retaining ring. And / or, the cover plate 322 is a non-magnetic cover plate. And / or, the retaining ring 132 is a non-magnetic retaining ring.

[0044] As Figure 1 shown, in some embodiments, the rotor structure further includes a central body bracket 15. The central body bracket 15 is spaced apart from the rotor core 11. The central body bracket 15 is provided with a connecting plate 151 extending toward the rotor core 11. The connecting plate 151 is connected to the rotor core 11. Among them, the shielding assembly 3 further includes a shielding plate 33. The shielding plate 33 is connected to the connecting plate 151. Along the axial direction of the rotor core 11, the projection of the shielding plate 33 partially covers the connecting plate 151.

[0045] It can be understood that the central body support 15 is arranged inside the rotor core 11. A connecting plate 151 is integrally formed on the outer peripheral surface of the central body support 15. The connecting plate 151 extends towards the rotor core 11 and then is connected to the rotor core 11. Among them, the connecting plate 151 is provided with at least two, and is arranged at intervals along the axial direction of the central body support 15. Due to the setting of multiple connecting plates 151, the central body support 15 cannot form a rotary body structure. During the rotation of the central body support 15 and the connecting plate 151 with the rotor core 11, air vortices and medium- and high-frequency pressure pulsations will be generated, thereby reducing ventilation loss and wind noise. In the embodiment of the present application, the baffle plate 33 is used to partially block the connecting plate 151, so that at least part of the end face area of the central body support 15 is in the shape of a rotary body structure, which can reduce the air vortices and medium- and high-frequency pressure pulsations generated during rotation, thereby reducing ventilation loss and wind noise.

[0046] It should be noted that the baffle plate 33 is an annular plate. The baffle plate 33 can be welded to the connecting plate 151 and / or the central body support 15.

[0047] The baffle plate 33 only partially covers the connecting plate 151, thereby reserving an air inlet for the central body support 15 so that air flow can enter the central body support 15.

[0048] According to the second aspect of the present application, a generator is provided. The generator includes a stator structure and the rotor structure in the foregoing embodiment. Among them, the stator structure is sleeved outside the rotor structure.

[0049] In the embodiment of the present application, the first protruding section 121 of the rotor winding and the first fastener 14 for fixing the rotor core 11 are blocked by the shielding assembly 3 in the shape of a rotary body structure, so that the outer peripheral surface and the end face of the rotor structure form a complete rotary body structure. The shape of the contact surface between the outer peripheral surface and the end face of the rotor and the air is smooth, which can effectively eliminate the air vortices and medium- and high-pressure pulsations generated when the protruding structure on the rotor surface sweeps, and reduce the ventilation loss and wind noise. Thus, the motor can have the advantages of low ventilation loss and low wind noise during operation, which can improve the motor efficiency and reduce noise pollution.

[0050] Such as Figure 1 and Figure 2As shown, in some embodiments, the generator further includes a machine pit 4, a machine base 5, and a frame 6. The interior of the machine pit 4 is hollow. The machine base 5 is disposed within the machine pit 4. Both the stator structure and the rotor structure are disposed on the machine base 5. The frame 6 is disposed within the machine pit 4. Among them, the frame 6 and the machine base 5 are spaced apart. The frame 6 is connected with a wind deflector 61 extending in the direction of the machine base 5. The wind deflector 61 and the machine base 5 are spaced apart and form a first ventilation gap 71. The stator structure includes a stator core 21 and a stator winding. The stator core 21 is sleeved outside the rotor core 11. The stator winding is embedded in the stator core 21. The stator winding has a second extending section 221 axially extending from the stator core 21. A second ventilation gap 72 is formed within the second extending section 221. The second ventilation gap 72 communicates with the first ventilation gap 71.

[0051] It can be understood that the interior of the machine pit 4 is hollow for placing the stator structure, the rotor structure, the machine base 5, and the frame 6, and the airflow generated by the centrifugal fan 321 can circulate inside the machine pit 4 to achieve cooling of each component.

[0052] Specifically, the wind deflector 61 is welded to the frame 6, and the wind deflector 61 and the machine base 5 are spaced apart to form a first ventilation gap 71. A second ventilation gap 72 is formed within the second extending section 221 of the stator winding. The first air duct gap communicates with the second ventilation gap 72. When the airflow flows from the first ventilation gap 71 into the second ventilation gap 72, the second extending section 221 can be cooled to achieve cooling of the end of the stator winding.

[0053] It should be noted that the second extending section 221 is the electrical connection path between the stator winding and the external structure. Since the stator winding and the stator core 21 do not rotate, there is no need to design a shielding component 3 for the stator core 21, the stator winding, and the second extending section 221.

[0054] Please continue to refer to Figure 2 In some embodiments, the shielding component 3 includes a centrifugal fan 321 and a retaining ring. The centrifugal fan 321 is connected to the rotor core 11. The retaining ring is sleeved on the first extending section 121. Among them, a cover plate 322 is connected between the centrifugal fan 321 and the retaining ring. The centrifugal fan 321, the cover plate 322, and the retaining ring enclose a first air duct 81. The first air duct 81 communicates with the second ventilation gap 72. A third ventilation gap 73 is formed within the first extending section 121, and the third ventilation gap 73 communicates with the first air duct 81.

[0055] It can be understood that the centrifugal fan 321 can not only make the end face of the rotor structure a rotary body structure, but also form an airflow during rotation. The formed airflow can enter the first air duct 81 and then enter the third ventilation gap 73, thereby cooling the first extending section 121 to achieve cooling of the end of the rotor winding.

[0056] Among them, the first air duct 81 is also communicated with the second ventilation gap 72, so as to realize air flow circulation.

[0057] It should be noted that the inside of the centrifugal fan 321 is hollow. After the cover plate 322 is connected between the centrifugal fan and the retaining ring, the three can also form a channel, which is communicated with the internal space of the centrifugal fan 321 to form the first air duct 81.

[0058] Please continue to refer to Figure 2 , in some embodiments, the rotor structure includes a first tooth pressure plate 131. A fourth ventilation gap 74 is formed between the first tooth pressure plate 131 and the rotor core 11. The fourth ventilation gap 74 is communicated with the third ventilation gap 73. A second air duct 82 is formed in the machine base 5, and the second air duct 82 is communicated with the fourth ventilation gap 74 and the first ventilation gap 71.

[0059] It can be understood that based on the formation of the fourth ventilation gap 74 between the first tooth pressure plate 131 and the rotor core 11, a second air duct 82 is formed in the base, and the third ventilation gap 73, the fourth ventilation gap 74, the second air duct 82 and the first ventilation gap 71 are communicated in sequence to realize air flow circulation.

[0060] Such as Figure 4 shown, one set of air flow directions in the present application is: the first ventilation gap 71 → the second ventilation gap 72 → the first air duct 81 → the third ventilation gap 73 → the fourth ventilation gap 74 → the second air duct 82 → the cooler 9 → the first ventilation gap 71. Thus, air flow circulation is realized, so as to cool the ends of the stator winding and the rotor winding.

[0061] Please continue to refer to Figure 2 , in some embodiments, a cooler 9 is connected to the machine base 5, and the cooler 9 is located between the second air duct 82 and the first ventilation gap 71.

[0062] It can be understood that the cooler 9 can cool the air flow. When the air flow converges in the second air duct 82, the air flow will pass through the cooler 9 and then enter the first ventilation gap 71, so that the air flow for cooling the second extended section 221 and the first extended section 121 is in a low temperature state, ensuring the cooling effect.

[0063] Please continue to refer to Figure 1 and Figure 2, in some embodiments, the rotor structure further includes a central body support 15. A third air duct 83 is formed inside the central body support 15. The third air duct 83 communicates with the second ventilation gap 72. The rotor core 11 includes at least two stacked rotor core laminations 111. Every two adjacent rotor core laminations 111 are spaced apart to form a fifth ventilation gap 75. The fifth ventilation gap 75 communicates with the third air duct 83. The stator core 21 includes at least two stacked stator core laminations 211. Every two adjacent stator core laminations 211 are spaced apart to form a sixth ventilation gap 76. The sixth ventilation gap 76 communicates with the fifth ventilation gap 75 and the second air duct 82.

[0064] It can be understood that after the third air duct 83 inside the central body support 15 communicates with the second ventilation gap 72, it can receive the air flow flowing out from the second ventilation gap 72 and sequentially convey the air flow into the fifth ventilation gap 75 and the sixth ventilation gap 76, so as to cool the rotor core 11, the stator core 21, the rotor winding and the stator winding respectively.

[0065] In some embodiments, the rotor core laminations 111 and the stator core laminations 211 have the same thickness, and the fifth ventilation gap 75 and the sixth ventilation gap 76 also have the same thickness. Each fifth ventilation gap 75 corresponds to and communicates with a sixth ventilation gap 76.

[0066] In some embodiments, the rotor core laminations 111 and the stator core laminations 211 have different thicknesses, and the fifth ventilation gap 75 and the sixth ventilation gap 76 also have different thicknesses. The rotor core laminations 111 and the stator core laminations 211 are in clearance fit, and the fifth ventilation gap 75 and the sixth ventilation gap 76 communicate through this clearance.

[0067] Please continue to refer to Figure 4 , one set of air flow directions in the present application is: the first ventilation gap 71 → the second ventilation gap 72 → the third air duct 83 → the fifth ventilation gap 75 → the sixth ventilation gap 76 → the second air duct 82 → the cooler 9 → the first ventilation gap 71. Thus, the air flow circulation is realized, so as to cool the rotor core 11, the stator core 21, the rotor winding and the stator winding.

[0068] In the embodiments of the present application, two sets of circulating air flows are formed, so as to realize the cooling of the rotor core 11, the stator core 21, the rotor winding and its ends, and the stator winding and its ends. During the air flow circulation process, the cooler 9 cools the air flow to ensure that the air flow remains at a low temperature during the cooling process, so as to effectively control the temperature rise of the generator and can ensure the uniformity of the temperature rise of the generator as much as possible.

[0069] Based on the fact that the second extended section 221 of the stator winding is the component that first comes into contact with the low-temperature air flow, it can keep the end part of the stator winding in the cold air area, significantly improving the heat dissipation conditions of the end part of the stator winding and the stator lead-out wire 122, which is beneficial for the generator to meet the technical requirements of flexible operation such as peak shaving, frequency modulation, and phase modulation.

[0070] In the embodiment of the present application, based on forming two-way circulating air flow, it is also possible to eliminate the need to set a large-size sealing structure at the end of the generator, thereby increasing the maintenance space at the end of the generator and providing a better working environment for unit installation and on-site operation and maintenance.

[0071] As Figure 3 shown, in some embodiments, the stator structure further includes a second tooth pressing plate 22. A seventh ventilation gap 77 is formed between the second tooth pressing plate 22 and the stator core 21. The seventh ventilation gap 77 communicates between the fourth ventilation gap 74 and the second air duct 82. Among them, the second extended section 221 penetrates through the second tooth pressing plate 22 and is connected with a seal 134. The seal 134 is configured to block the air flow from flowing back to the second ventilation gap 72.

[0072] It can be understood that since the stator structure is located outside the rotor structure, the fourth ventilation gap 74 of the rotor structure cannot be directly communicated with the second air duct 82. In the embodiment of the present application, a seventh ventilation gap 77 is formed between the second tooth pressing plate 22 and the stator core 21 of the stator structure, and the seventh ventilation gap 77 is used to communicate the fourth ventilation gap 74 and the second air duct 82. Among them, by setting a seal 134 on the second extended section 221, the air leakage from the fourth ventilation gap 74 to the second ventilation gap 72 is reduced, preventing the occurrence of hot air backflow phenomenon and improving the air utilization rate of the generator ventilation system.

[0073] As Figure 4 shown, one set of air flow directions in the present application is: the first ventilation gap 71 → the second ventilation gap 72 → the first air duct 81 → the third ventilation gap 73 → the fourth ventilation gap 74 → the seventh ventilation gap 77 → the second air duct 82 → the cooler 9 → the first ventilation gap 71. Thus, air flow circulation is achieved, thereby cooling the end parts of the stator winding and the rotor winding.

[0074] It should be noted that two second tooth pressing plates 22 are provided and are respectively located on opposite sides of the stator core 21. The second tooth pressing plate 22 and the stator core 21 can be connected by fasteners.

[0075] Please continue to refer to Figure 3 , in some embodiments, the rotor winding further has a lead-out wire 122. The lead-out wire 122 passes through the centrifugal fan 321 and is fixed to the centrifugal fan 321 by a second fastener 123.

[0076] It can be understood that, based on the lead wire 122 of the rotor winding being passed through the centrifugal fan 321 and fixed by the second fastener 123, while fixing the lead wire 122 of the rotor winding, heat dissipation is carried out for it. Among them, the lead wire 122 is the lead wire 122 at the non-driving end of the rotor winding, thereby achieving good cooling of the non-driving end of the rotor winding.

[0077] In some embodiments, the lead wire 122 can be fixed in the centrifugal fan 321 by a clamp.

[0078] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0079] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0080] Among the embodiments, implementation manners and related technical features of the present application, they can be combined and replaced with each other without conflict.

[0081] The above are only the preferred embodiments of the present application and do not impose any form of limitation on the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A rotor structure, characterized in that: include: Rotor core (11); A rotor winding, embedded in the rotor core (11), and having a first extending section (121) extending out of the rotor core (11) in the axial direction of the rotor core (11); A shielding assembly (3) is connected to the rotor core (11) and / or the first extending section (121); the shielding assembly (3) is configured as a rotating body structure and is coaxial with the rotor core (11); wherein, along the radial direction of the rotor core (11), the projection of the shielding assembly (3) at least covers the first extending section (121); and along the axial direction of the rotor core (11), the projection of the shielding assembly (3) at least covers the first fastener (14) of the rotor core (11) and the first extending section (121).

2. The rotor structure according to claim 1, characterized in that: The shielding component (3) comprises: a first shielding member (31) connected to the first extending section (121), wherein a projection of the first shielding member (31) at least covers the first extending section (121) along a radial direction of the rotor core (11); A second shielding member (32) is connected to the rotor core (11), and along the axial direction of the rotor core (11), a projection of the second shielding member (32) at least covers the first fastening member (14) and the first extending section (121).

3. The rotor structure according to claim 2, characterized in that: The rotor structure further comprises: A crimping piece (13) connected to the rotor core (11) via the first fastener (14); The second shielding member (32) comprises: A centrifugal fan (321) connected to a side of the crimping piece (13) away from the rotor core (11); Wherein, along the axial direction of the rotor core (11), the projection of the centrifugal fan (321) at least covers the first fastener (14).

4. The rotor structure according to claim 3, characterized in that: The second shielding member (32) further comprises: A cover plate (322) connected between the centrifugal fan (321) and the first shielding member (31); Wherein, along the axial direction of the rotor core (11), the projection of the cover plate (322) at least covers the first extending section (121).

5. A generator, based on the rotor structure according to any one of claims 1 to 4, characterized in that: include: Stator structure; Wherein, the stator structure is sleeved outside the rotor structure.

6. The generator according to claim 5, characterized in that: The generator further comprises: The machine pit (4) is hollow inside; A machine base (5) is arranged in the machine pit (4), and the stator structure and the rotor structure are both arranged on the machine base (5); A frame (6) is arranged in the machine pit (4), the frame (6) and the machine base (5) are spaced apart, the frame (6) is connected to a windshield (61) extending in the direction of the machine base (5), the windshield (61) and the machine base (5) are spaced apart, and a first ventilation gap (71) is formed; The stator structure comprises: A stator core (21) is sleeved outside the rotor core (11); The stator winding is embedded in the stator core (21) and has a second extension section (221) extending out of the stator core (21) in the axial direction of the stator core (21), a second ventilation gap (72) being formed in the second extension section (221), and the second ventilation gap (72) is connected to the first ventilation gap (71).

7. The generator according to claim 6, characterized in that: The shielding assembly (3) comprises a centrifugal fan (321) and a guard ring, the centrifugal fan (321) being connected to the rotor core (11), the guard ring being sleeved on the first extension section (121), wherein a cover plate (322) is connected between the centrifugal fan (321) and the guard ring, the centrifugal fan (321), the cover plate (322) and the guard ring enclosing a first air duct (81), and the first air duct (81) being in communication with the second ventilation gap (72); A third ventilation gap (73) is formed in the first extending section (121), and the third ventilation gap (73) is in communication with the first air duct (81).

8. The generator according to claim 7, characterized in that: The rotor structure comprises a first tooth pressure plate (131), a fourth ventilation gap (74) is formed between the first tooth pressure plate (131) and the rotor core (11), and the fourth ventilation gap (74) is connected to the third ventilation gap (73); A second air duct (82) is formed in the machine base (5), and the second air duct (82) is in communication with the fourth ventilation gap (74) and the first ventilation gap (71).

9. The generator according to claim 8, characterized in that: The rotor structure further comprises: A central body support (15) having a third air duct (83) formed therein, the third air duct (83) being in communication with the second ventilation gap (72); The rotor core (11) comprises at least two stacked rotor core laminations (111), each two adjacent rotor core laminations (111) are arranged at an interval to form a fifth ventilation gap (75), and the fifth ventilation gap (75) is in communication with the third air duct (83); The stator core (21) comprises at least two stacked stator core laminations (211), each two adjacent stator core laminations (211) are arranged at an interval to form a sixth ventilation gap (76), and the sixth ventilation gap (76) is connected to the fifth ventilation gap (75) and the second air duct (82).

10. The generator according to claim 8, characterized in that The stator structure also includes a second tooth pressure plate (22), a seventh ventilation gap (77) is formed between the second tooth pressure plate (22) and the stator core (21), and the seventh ventilation gap (77) is connected between the fourth ventilation gap (74) and the second air duct (82), wherein the second extension section (221) passes through the second tooth pressure plate (22) and is connected to a seal (134), and the seal (134) is configured to block airflow from flowing back to the second ventilation gap (72).

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