A winding skeleton for a generator rotor with good heat dissipation

Abstract

The utility model discloses a winding skeleton for generator rotor with good heat dissipation, can let the metal copper wire winding that the rotor part is covered around heat dissipation from inside and outside through the heat conduction slot opening on the skeleton main part department simultaneously, thereby effectively promote the heat dissipation efficiency, avoid the temperature rise when the generator operation work is too high. The winding skeleton contains the skeleton main part department of cylindrical shape, the inside of skeleton main part department is equipped with the cylindrical installation cavity that passes through up and down, and the outside of the upper end and lower end of skeleton main part department is connected respectively and is provided with the annular limiting sheet of circular ring shape, still be connected with the blade portion that extends outward on the outside of annular limiting sheet, the skeleton main part department is equipped with the heat conduction slot that passes through from outside to inside.

Description

Technical Field

[0001] This utility model relates to the field of components for generator rotor manufacturing, specifically a winding frame for generator rotors with good heat dissipation. Background Technology

[0002] In the manufacture of generators for agricultural machinery or vehicles, the generator rotor is a crucial component. During rotor manufacturing, a winding skeleton made of plastic or resin is first produced as the base for winding copper wire around the rotor. The winding skeleton provides a foundation and support for the winding, ensuring the winding shape is regular and meets design requirements. It enhances the mechanical strength of the winding, maintaining stability under high-speed rotation and centrifugal force, preventing deformation or loosening. Furthermore, the wire grooves on the winding skeleton guide the wire direction, ensuring uniform and standardized winding, improving winding quality and efficiency, while preventing slippage or short circuits, thus enhancing winding stability. The winding skeleton is typically made of insulating material, providing good insulation to the winding, preventing short circuits, and improving the penetration of the insulating varnish through through holes and gaps, further enhancing insulation performance. In addition, the winding skeleton increases the contact area between the winding and the surrounding environment, guiding the flow of heat dissipation medium, helping the winding dissipate heat during operation, reducing temperature, and extending service life. In summary, the winding bobbin plays a crucial role in the manufacturing of generator rotors, not only improving the mechanical and electrical performance of the windings but also ensuring the operational stability and safety of the generator.

[0003] Currently, there are several generator rotor winding frames on the market that can be designed according to different actual application scenarios. For example, a coil frame disclosed in Chinese utility model patent application CN201320210791.1 includes a winding part, blades, and positioning guide posts. The winding part is a thin-walled cylinder with a ring of blades radially formed at both ends of the cylinder. An arc-shaped opening is provided between adjacent blades, and a circular heat dissipation hole is opened at the root of the blade. The outer diameter D of the blade is 100~105mm. The positioning guide posts are formed perpendicularly on the surface of the blades, which can protect the internal enameled wire over a larger area, making it less likely to be damaged by the pole claws in the generator and short-circuit during operation. It has high safety, good heat dissipation, and long service life.

[0004] However, the applicant discovered that the existing winding skeleton for generator rotors has a relatively closed internal frame structure, which easily leads to the heat generated by the rotor's copper wire windings being blocked by the winding skeleton, thus hindering the transfer of heat from the rotor to the central metal shaft during generator operation. This greatly reduces the heat dissipation efficiency of the generator rotor, resulting in excessively high overall generator temperature rise, reduced working efficiency, and even accelerated wear of local parts.

[0005] To address the aforementioned issues, this invention provides a winding frame for a generator rotor with excellent heat dissipation. The heat-conducting slots on the main body of the frame allow the copper wire windings surrounding the rotor components to dissipate heat simultaneously from both the inside and outside, thereby effectively improving heat dissipation efficiency and preventing excessive temperature rise during generator operation. Utility Model Content

[0006] This utility model provides a winding frame for a generator rotor with good heat dissipation. The heat-conducting slots opened on the main body of the frame allow the metal copper wire windings wrapped around the rotor components to dissipate heat from both the inside and outside, thereby effectively improving heat dissipation efficiency and preventing excessive temperature rise during generator operation.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0008] A winding frame for a generator rotor with good heat dissipation is characterized by: a cylindrical frame body, wherein a cylindrical mounting cavity is provided inside the frame body, and annular limiting plates are respectively connected to the outer sides of the upper and lower ends of the frame body, and outwardly extending blade portions are also connected to the outer sides of the annular limiting plates; and a heat-conducting groove is provided on the frame body, which extends from the outside to the inside.

[0009] As a preferred embodiment of the present invention, the heat-conducting groove is an elongated strip extending in the vertical direction and the heat-conducting groove is evenly spaced and arranged around the main body of the skeleton.

[0010] As a preferred embodiment of the present invention, support sidewalls protruding outward from the main body of the skeleton are formed on both sides of the heat-conducting groove. A heat-conducting flow channel is formed between a group of support sidewalls arranged on two adjacent heat-conducting grooves and close to each other. At the same time, several heat dissipation openings that are vertically connected and correspond to each heat-conducting flow channel are also provided on the upper and lower annular limiting plates.

[0011] As a preferred embodiment of the present invention, a toothed groove is also provided on the support side wall plate to prevent slippage of the copper wire during winding.

[0012] As a preferred embodiment of the present invention, annular reinforcing ribs are also formed on the surface of the annular limiting piece.

[0013] As a preferred embodiment of the present invention, the annular limiting piece is further provided with a protruding winding positioning terminal.

[0014] In summary, this utility model can achieve the following beneficial effects:

[0015] This utility model provides a winding frame for a generator rotor with good heat dissipation. The heat-conducting slots on the main body of the frame allow the copper wire windings wrapped around the rotor components to dissipate heat from both the inside and outside, thereby effectively improving heat dissipation efficiency and preventing excessive temperature rise during generator operation. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structural layout of a winding frame for a generator rotor with good heat dissipation.

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the wire-wound skeleton from a top-down view.

[0018] Figure 3 A partially enlarged schematic diagram of the heat-conducting grooves formed on the winding frame and the heat dissipation openings supported by the side wall plates;

[0019] Figure 4 This is a partially enlarged schematic diagram of the toothed groove structure formed on the side wall panel from a side view.

[0020] In the picture:

[0021] 1—Main frame, 101—Cylindrical mounting cavity, 102—Heat conduction groove, 103—Support side wall plate, 1031—Toothed groove;

[0022] 2—Annular limiting piece, 201—Heat dissipation opening, 202—Annular reinforcing rib, 203—Wire winding positioning terminal;

[0023] 3—The blade section. Detailed Implementation

[0024] The following specific embodiments are merely explanations of this utility model and are not intended to limit it. After reading this specification, those skilled in the art can make modifications to these embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this utility model.

[0025] This solution is achieved through the following technical means:

[0026] Example: In this example, a winding frame for a generator rotor with good heat dissipation is provided. The heat-conducting slots 102 opened on the main body 1 of the frame allow the metal copper wire windings wrapped around the rotor components to dissipate heat from both the inside and outside at the same time, thereby effectively improving heat dissipation efficiency and avoiding excessive temperature rise when the generator is running.

[0027] Specifically, the structure of this winding bobbin can be found in the instruction manual appendix. Figure 1The following description illustrates the process. The winding frame is made entirely of plastic or insulating resin material. Structurally, it includes a cylindrical frame body 1 located at the center. The frame body 1 has a cylindrical mounting cavity 101 extending vertically through it. This cylindrical mounting cavity 101 is primarily used for the rotor's central shaft to pass through during subsequent generator assembly. Annular limiting plates 2 are respectively connected to the outer sides of the upper and lower ends of the frame body 1. Outwardly extending blades 3 are also connected to the outer sides of the annular limiting plates 2. The main function of the annular limiting plates 2 is to stably confine the copper wire winding subsequently wound on the frame within the middle portion, preventing it from slipping outwards.

[0028] The most important and fundamental optimization and improvement technique of this application is the provision of a heat-conducting groove 102 that runs from the outside to the inside on the main body 1 of the skeleton. (See also the attached specification.) Figure 1 Taking the structure shown as an example, the heat-conducting slots 102 used in this embodiment are elongated strips extending vertically, and the heat-conducting slots 102 are evenly spaced around the main body 1 of the frame. When the metal coil windings are wrapped around the outside of the winding frame under this structure and applied to the generator rotor component, the heat generated by the metal windings can be directly transferred inwards through the heat-conducting slots 102 to the central shaft of the metal material and then dissipated outwards, thereby improving the heat dissipation efficiency of the generator product during operation.

[0029] As a preferred structure, refer to the appendix to the instruction manual. Figure 3 The structure shown features support sidewalls 103 protruding outward from the main body 1 of the frame, formed on both sides of the aforementioned heat-conducting slots. A heat-conducting flow channel is formed between a cluster of support sidewalls 103 arranged close to each other on two adjacent heat-conducting slots 102. Furthermore, several heat dissipation openings 201, vertically connected and corresponding to each heat-conducting flow channel, are provided on the upper and lower annular limiting plates 2. With this structure, on the one hand, the aforementioned support sidewalls 103 effectively enhance the structural strength of the winding frame, preventing deformation during winding. On the other hand, due to the existence of the heat-conducting flow channels and the corresponding heat dissipation openings 201, air can enter the heat-conducting flow channel through one end of the heat dissipation opening 201 during rotor rotation, continuously contacting the inner side of the metal winding, and then being discharged outward from the other end of the heat dissipation opening 201, thereby further improving the generator's heat dissipation efficiency.

[0030] Further preferred options are those attached to the instruction manual. Figure 4Taking the structure shown as an example, the support sidewall 103 is further provided with a plurality of toothed slots 1031 arranged continuously in the vertical direction. These slots allow the innermost copper wire to engage and embed itself in the toothed slots 1031 when the copper coil is wound around the outer side of the winding frame, preventing slippage and wobbling. Once the innermost coil is wound, the subsequent coil segments wound around the outer side can be positioned and engaged through mutual contact, preventing slippage and wobbling. Of course, to position one end of the copper wire during winding, a protruding winding positioning terminal 203 can be provided on the annular limiting piece 2. More preferably, because the winding frame is subjected to an inward compressive force when winding the outer copper coil, its structure deforms and cannot maintain a relatively regular cylindrical shape. Therefore, in order to enhance the structural strength of the winding skeleton provided in this embodiment under the above-mentioned winding situation, an annular reinforcing rib 202 that protrudes upward or downward and is in the shape of a ring can be formed on the surface of the annular limiting piece 2.

[0031] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A winding frame for a generator rotor with good heat dissipation, characterized in that: The system includes a cylindrical skeleton body (1), with a cylindrical mounting cavity (101) extending vertically inside the skeleton body (1). Circular limiting plates (2) are connected to the outer sides of the upper and lower ends of the skeleton body (1), and outwardly extending blades (3) are also connected to the outer sides of the circular limiting plates (2). A heat-conducting groove (102) extending from the outside to the inside is provided on the skeleton body (1).

2. The winding frame for a generator rotor with good heat dissipation according to claim 1, characterized in that: The heat-conducting groove (102) is a long strip extending in the vertical direction and the heat-conducting groove (102) is evenly spaced around the main body of the skeleton (1).

3. The winding frame for a generator rotor with good heat dissipation according to claim 2, characterized in that: On both sides of the heat-conducting groove (102), there are support sidewalls (103) that protrude outward from the main body of the skeleton (1). A heat-conducting flow channel is formed between a group of support sidewalls (103) arranged on two adjacent heat-conducting grooves (102) and close to each other. At the same time, several heat dissipation openings (201) are also provided on the upper and lower annular limiting plates (2), which are vertically connected and correspond to each heat-conducting flow channel.

4. The winding frame for a generator rotor with good heat dissipation according to claim 3, characterized in that: The support side wall plate (103) is also provided with toothed grooves (1031) for preventing slippage of the copper wire during winding.

5. The winding frame for a generator rotor with good heat dissipation according to claim 4, characterized in that: An annular reinforcing rib (202) is also formed on the surface of the annular limiting piece (2).

6. The winding frame for a generator rotor with good heat dissipation according to claim 4, characterized in that: The annular limiting piece (2) is also provided with a protruding winding positioning terminal (203).

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