Rotor core, rotor and generator

Abstract

The utility model relates to the technical field of generators, in particular to a rotor core, a rotor and a generator. The rotor iron core comprises a rotor iron core body, a bearing hole is formed in the central axis of the rotor iron core body, a plurality of winding grooves are formed in the edge of the rotor iron core body, a plurality of ventilation and heat dissipation holes are axially formed in the rotor iron core body, and the ventilation and heat dissipation holes are located between the winding grooves and the bearing hole and located between N-S magnetic poles. The rotor core has better ventilation and heat dissipation effects.

Description

Technical Field

[0001] This utility model relates to the field of generator technology, specifically to a rotor core, rotor, and generator. Background Technology

[0002] Generators are mechanical devices that convert mechanical energy into electrical energy. They typically consist of components such as a stator, rotor, end caps, and bearings.

[0003] The rotor mainly consists of a rotor core, insulation material, and copper wire windings. Because the rotor windings are wound in layers, poor ventilation can cause difficulties in controlling the rotor temperature when excitation current passes through it, leading to an increase in rotor temperature and failure to meet specifications.

[0004] In related technologies, the previous methods for dealing with rotor defects due to high temperature were to increase the rotor height or increase the winding wire diameter or number of turns. However, adopting the above methods would completely eliminate the cost advantage. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a rotor core, a rotor, and a generator. The rotor core has better ventilation and heat dissipation effect, the rotor using the rotor core has better temperature control effect, the generator using the rotor can effectively improve the qualification rate, and has a lower cost advantage.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] In a first aspect, the present invention provides a rotor core, including a rotor core body, a bearing hole is provided on the central axis of the rotor core body, a plurality of winding slots are provided on the edge of the rotor core body, and a plurality of ventilation and heat dissipation holes are provided axially on the rotor core body, the ventilation and heat dissipation holes being located between the winding slots and the bearing hole and between the N and N magnetic poles.

[0008] By adopting the above technical solution, when the rotor core rotates, the ventilation and heat dissipation holes between the N and S magnetic poles can partially isolate the two magnetic poles, reduce magnetic field loss, and increase rotor magnetic flux. At the same time, air can pass through the ventilation and heat dissipation holes, thus improving the ventilation effect of the rotor core. These two methods work together to reduce rotor temperature rise, resulting in better temperature control of the rotor.

[0009] Optionally, the plurality of winding slots are divided into two groups, with each group consisting of two winding slots, which are distributed in pairs on opposite sides of the rotor core body.

[0010] By adopting the above technical solution, copper wire can be wound in the winding slot.

[0011] Optionally, the two side walls of the winding slot are respectively provided with a first limiting part and a second limiting part, and both the first limiting part and the second limiting part are located at the opening of the winding slot.

[0012] By adopting the above technical solution, the first limiting part and the second limiting part can limit the copper wire of the winding, thereby ensuring the stability of the copper wire winding.

[0013] Optionally, the rotor core body has a weight reduction opening, which is located between two adjacent winding slots.

[0014] By adopting the above technical solution, the weight reduction opening can reduce the weight of the rotor core body, thereby ensuring the rotor's rotational efficiency.

[0015] Optionally, the bearing hole is provided with overlapping anti-mistake marking holes on the hole wall.

[0016] By adopting the above technical solution, the setting of overlapping anti-misalignment marking holes can realize the positioning between the bearing and the rotor core body.

[0017] Secondly, this utility model provides a rotor, including the rotor core as described in the first aspect.

[0018] By adopting the above technical solution, the rotor has a better temperature control effect.

[0019] Thirdly, this utility model provides a generator, including the rotor as described in the second aspect.

[0020] By adopting the above technical solutions, the generator can better ventilate and dissipate heat, thus achieving better temperature control, which in turn can effectively improve the pass rate and give the generator a lower cost advantage.

[0021] In summary, this utility model has at least the following beneficial technical effects:

[0022] Using this solution, the generator rotor efficiency under the same hot state is improved by 2%, the generator energy consumption is reduced, the temperature rise is reduced by more than 15K, and the amount of enameled wire used in the winding is reduced by 3%. The implementation cost of this solution is low, and the effect can be achieved by simply changing the mold. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the rotor core in an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached drawings: 1. Rotor core body; 2. Bearing hole; 3. Overlapping anti-misalignment marking hole; 4. Winding slot; 5. Weight reduction opening; 6. First limiting part; 7. Second limiting part; 8. Ventilation and heat dissipation hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0026] The terminology used in the following embodiments of this utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification and appended claims of this utility model, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this utility model refers to and includes any or all possible combinations of one or more of the listed items. The term “exemplary” means “serving as an example, embodiment, or illustration,” and any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. The terms “first” and “second” are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include one or more of that feature, and in the description of embodiments of this utility model, unless otherwise stated, “a plurality” means two or more.

[0027] This embodiment provides a rotor core.

[0028] refer to Figure 1 The rotor core includes a rotor core body 1. A bearing hole 2 is provided on the central axis of the rotor core body 1 to facilitate the bearing to pass through and be fixed on the rotor core body 1. Overlapping anti-misalignment marking holes 3 are provided on the wall of the bearing hole 2 to achieve positioning between the bearing and the rotor core body 1.

[0029] Multiple winding slots 4 are provided on the edge of the rotor core body 1, and copper wire can be wound on the multiple winding slots 4. In the embodiment of this application, there are four winding slots 4, which are divided into two groups, with two winding slots 4 in each group. The winding slots 4 are distributed in pairs on opposite sides of the rotor core body 1.

[0030] Two weight-reduction openings 5 ​​are provided on the rotor core body 1. One weight-reduction opening 5 is located between two adjacent winding slots 4 in one group, and the other peripheral opening is located between two adjacent winding slots 4 in another group. That is, the two weight-reduction openings 5 ​​are distributed on opposite sides of the rotor core body 1. The provision of weight-reduction openings 5 ​​can reduce the weight of the rotor core body 1, thereby ensuring the rotational efficiency of the rotor.

[0031] The winding slot 4 has a first limiting part 6 on the slot wall near the weight reduction opening 5, with the first limiting part 6 facing the side of the winding slot 4 away from the weight reduction opening 5. The winding slot 4 also has a second limiting part 7 on the slot wall away from the weight reduction opening 5, with the second limiting part 7 facing the side of the winding slot 4 near the weight reduction opening 5. Both the first limiting part 6 and the second limiting part 7 are located at the opening of the winding slot 4. That is, the first limiting part 6 faces the second limiting part 7 of the winding slot 4, and the second limiting part 7 faces the first limiting part 6 of the winding slot 4. During copper wire winding, both the first limiting part 6 and the second limiting part 7 can provide limiting support for the copper wire.

[0032] refer to Figure 1 Two ventilation and heat dissipation holes 8 are formed along the axial direction on the rotor core body 1. The two ventilation and heat dissipation holes 8 are located on opposite sides of the rotor core body 1, with one ventilation and heat dissipation hole 8 located between the bearing hole 2 and one of the weight reduction openings 5, and the other ventilation and heat dissipation hole 8 located between the bearing hole 2 and the other weight reduction opening 5. Specifically, after the copper wire is wound on the rotor core body 1, the N magnetic pole and the S magnetic pole are arranged alternately, and the ventilation and heat dissipation hole 8 is located between the N and S magnetic poles.

[0033] In this embodiment, the ventilation and heat dissipation hole 8 is crescent-shaped. In other embodiments, the ventilation and heat dissipation hole 8 may also have other shapes. It should be understood that the number of ventilation and heat dissipation holes 8 may also be other than two. The number of ventilation and heat dissipation holes 8 increases with the increase of the number of winding slots 4, with each winding slot 4 corresponding to one ventilation and heat dissipation hole 8.

[0034] When the rotor rotates, the ventilation and heat dissipation holes 8 on the rotor core body 1 provide ventilation and heat dissipation, resulting in better ventilation and heat dissipation for the rotor core. Specifically, the ventilation and heat dissipation holes 8, located between the N and S magnetic poles, partially isolate the two poles, reducing magnetic field losses and increasing rotor magnetic flux. The ventilation and heat dissipation holes 8 also improve rotor ventilation performance, thus reducing generator rotor temperature rise through both methods, resulting in better rotor temperature control. Furthermore, this effectively improves the yield rate of generators using this rotor and offers a lower cost advantage.

[0035] In actual testing, the rotor efficiency using the above-mentioned technical solution increased by 2% under the same hot state, reduced generator energy consumption, decreased temperature rise by more than 15K, and reduced the amount of enameled wire used in the winding by 3%. The implementation of this solution requires low investment; the above effects can be achieved simply by modifying the mold.

[0036] It should be understood that "rotor core" is a commonly used term in the industry, and the specific material is not necessarily iron; it can also be other metal alloys, which are not limited here.

[0037] This embodiment also provides a rotor, including the rotor core described above, as well as bearings and coils, with the coils wound on the rotor core and the bearings coaxially passing through and fixed to the rotor core.

[0038] This embodiment also provides a generator, including the rotor described above, as well as a housing and a stator. The stator is fixed inside the housing, and the rotor is coaxially rotatably connected to the cavity of the stator.

[0039] The above description of the embodiments is only used to provide a detailed introduction to the technical solution of this utility model. However, the description of the above embodiments is only for the purpose of helping to understand this utility model and should not be construed as a limitation of this utility model. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A rotor core, comprising a rotor core body (1), wherein a bearing hole (2) is provided on the central axis of the rotor core body (1), and a plurality of winding slots (4) are provided on the edge of the rotor core body (1), characterized in that, The rotor core body (1) has a plurality of ventilation and heat dissipation holes (8) axially opened on it. The ventilation and heat dissipation holes (8) are located between the winding slot (4) and the bearing hole (2) and between the N and N magnetic poles.

2. The rotor core as described in claim 1, characterized in that, The multiple winding slots (4) are divided into two groups, with two winding slots (4) in each group. The winding slots (4) are distributed in pairs on opposite sides of the rotor core body (1).

3. The rotor core as described in claim 2, characterized in that, The winding slot (4) has a first limiting part (6) and a second limiting part (7) on both sides of the slot wall, and the first limiting part (6) and the second limiting part (7) are both located at the opening of the winding slot (4).

4. The rotor core as described in any one of claims 1-3, characterized in that, The rotor core body (1) has a weight reduction opening (5) located between two adjacent winding slots (4).

5. The rotor core as described in any one of claims 1-3, characterized in that, The bearing hole (2) has overlapping anti-mistake marking holes (3) on its hole wall.

6. A rotor, characterized in that, Includes the rotor core as described in any one of claims 1-5.

7. A generator, characterized in that, Includes the rotor as described in claim 6.

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