Rotor shaft lead-through structure

Abstract

The utility model relates to a rotor passes through axle lead structure belongs to motor technical field. The structure includes: rotor shaft, it has deep hole and with deep hole connection's inclined hole, passes through axle conducting row, penetrates deep hole and inclined hole, fills with potting glue between passing through axle conducting row and deep hole, is provided with insulating block between passing through axle conducting row and inclined hole, and pressing plate is connected with rotor shaft through fastener, and pressing plate at least partial contact with insulating block is used for pressing insulating block. Insulating block is half formula epoxy pad, and its inside side contacts with potting glue and is fixed by it. One insulating block is equipped with two pressing plates, and there is gap between two pressing plates for passing through axle conducting row. Passing through axle conducting row is multilayered flexible conducting sheet. The one end of rotor shaft away from inclined hole is provided with cover plate, and potting glue hole is set up on cover plate for potting glue injection. The utility model discloses simple structure, and easy installation can effectively prevent potting glue leakage, reduce the damage of insulating block to passing through axle conducting row under the action of centrifugal force, improve the reliability and service life of rotor passes through axle lead structure.

Description

Technical Field

[0001] This application relates to the field of motor structure, specifically to a rotor through-shaft lead structure. Background Technology

[0002] With the development of power systems, high-power generators are playing an increasingly important role in power production. In high-power generators, the rotor through-shaft lead structure is a key component connecting the rotor windings to the external circuit, and its performance directly affects the generator's operational stability and reliability.

[0003] However, existing rotor through-shaft lead structures still have the following problems when applied to high-power generators: First, the existing structure is not effective at dissipating heat from the through-shaft conductors of high-power generators, which may lead to excessively high slip ring temperatures during long-term operation; second, the existing insulation structure has unstable insulation performance under high-temperature and high-speed operating environments, posing safety hazards; third, the traditional conductors are heavy, increasing the rotor imbalance and affecting the generator's operational stability; finally, the existing structure may experience insulation aging and conductor loosening during long-term operation, leading to serious failure modes such as slip ring burnout. Therefore, there is an urgent need for a rotor through-shaft lead structure with good heat dissipation, stable insulation performance, and a lightweight structure to meet the requirements of long-term stable operation of high-power generators. Utility Model Content

[0004] To address the technical problems of existing rotor through-shaft lead structures, such as poor heat dissipation and insulation of the through-shaft busbars in high-power generators, as well as the heavy weight of the busbars and the potential for slip ring overheating and burnout during long-term generator operation, a rotor through-shaft lead structure is provided. This structure is simple to operate, less prone to glue leakage, has strong wrapping properties, good sealing, good insulation, and good heat dissipation, effectively reducing the busbar temperature, especially when the rotor current is large.

[0005] The technical solution adopted by the present invention to solve its technical problem is as follows: a rotor through-shaft lead structure is provided, including a rotor shaft, a through-shaft conductive busbar, a pressure plate, an insulating block, and a cover plate; the rotor shaft includes a deep hole and an oblique hole connected to the deep hole; the through-shaft conductive busbar passes through the deep hole and the oblique hole; potting compound is filled between the through-shaft conductive busbar and the deep hole; an insulating block is provided between the through-shaft conductive busbar and the oblique hole; the pressure plate is connected to the rotor shaft by fasteners and is used to press the insulating block.

[0006] Preferably, the insulating block is an epoxy pad, the epoxy pad is split in half, and the through-shaft conductive busbar can penetrate the epoxy pad.

[0007] Preferably, the inner side of the insulating block is in contact with and fixed by the potting compound.

[0008] Preferably, the pressure plate is at least partially in contact with the insulating block, the rotor shaft is provided with a threaded hole, and the pressure plate is fixed to the rotor shaft by bolts for pressing the insulating block.

[0009] Preferably, one of the insulating blocks is configured with two pressure plates, with a gap between the two pressure plates for the through-shaft conductive busbar to pass through.

[0010] Preferably, the through-axis conductive busbar is a multi-layered flexible conductive sheet.

[0011] Preferably, a cover plate is provided at the end of the rotor shaft away from the inclined hole, and the cover plate has a potting hole for injecting the potting compound.

[0012] The beneficial effects of this invention are as follows: By using epoxy pads to tightly seal the oblique holes in the rotor through-shaft lead structure, and then pressing and fixing the epoxy pads with pressure plates and fastening bolts, while simultaneously filling the shaft hole with thermally conductive potting compound, compared with the prior art, the rotor through-shaft lead structure of this invention is simple to operate, less prone to glue leakage, has strong wrapping, good sealing, good insulation performance, and good heat dissipation performance. In particular, the pressing and fixing of the insulating block by the pressure plate reduces the loosening of the insulating block caused by the centrifugal force during rotor rotation, further reducing the damage to the through-shaft conductive busbar caused by the loosening of the insulating block. Especially through the use of thermally conductive potting compound, the temperature of the conductive busbar can be effectively reduced, the copper busbar specifications can be controlled, some costs can be saved, and the cooling capacity of the rotor conductive busbar can be improved, especially when the rotor current is large. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a cross-sectional view of the rotor through-shaft lead structure of this application.

[0015] Figure 2 This is a partial enlarged view of point A of the rotor through-shaft lead structure of this application.

[0016] Figure 3 This is a schematic diagram of the pressure plate of the rotor through-shaft lead structure of this application from another angle. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] In this specification, identical parts are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions towards or away from a specific component, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "multiple" means two or more.

[0019] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0020] In one embodiment of the rotor through-shaft lead structure provided by this utility model, there are a rotor shaft 1, a through-shaft conductive busbar 2, potting compound 3, an insulating block 4, a pressure plate 5, and a cover plate 6. The rotor shaft 1 has a deep hole inside, extending axially along the rotor shaft 1, with one end connected to the outside of the rotor shaft 1. The rotor shaft 1 also has an oblique hole, which connects to the deep hole and extends from the side of the rotor shaft 1 into the deep hole, forming an inclined channel. The through-shaft conductive busbar 2 passes through the deep hole and the oblique hole, allowing the conductive busbar to pass through the deep hole from one end of the rotor shaft 1 and then exit through the oblique hole to the side of the rotor shaft 1.

[0021] The gap between the through-shaft conductive busbar 2 and the deep hole is filled with potting compound 3. The potting compound 3 has good thermal conductivity and insulation properties, which can effectively fix the through-shaft conductive busbar 2 in the deep hole and conduct the heat generated by the through-shaft conductive busbar 2 during operation to the rotor shaft 1, thereby improving the heat dissipation effect. An insulating block 4 is provided between the through-shaft conductive busbar 2 and the inclined hole. The insulating block 4 can prevent electrical contact between the through-shaft conductive busbar 2 and the rotor shaft 1 and ensure electrical insulation performance.

[0022] A cover plate 6 is provided at the end of the rotor shaft 1 away from the inclined hole. The cover plate 6 has a potting hole for injecting potting compound 3. The cover plate 6 is fixed to the rotor shaft 1 by bolts or other fasteners, which can seal one end of the deep hole and prevent the potting compound 3 from flowing out. The potting compound 3 can be injected into the deep hole through the potting hole to fill the gap between the through-shaft conductive busbar 2 and the deep hole.

[0023] The pressure plate 5 is connected to the rotor shaft 1 via fasteners and is used to press the insulating block 4. The fasteners can be common fastening components such as bolts and screws. Through the cooperation of the pressure plate 5 and the fasteners, the insulating block 4 can be firmly fixed at the oblique hole, preventing the insulating block 4 from loosening or falling off during the high-speed rotation of the rotor.

[0024] Insulating block 4 is made of epoxy pads, which have excellent insulation properties and mechanical strength, and can maintain stable performance in high-temperature environments. The epoxy pads are designed with a split structure, consisting of two semi-circular parts. This design facilitates installation; after the through-shaft conductive busbar 2 passes through the oblique hole, the two semi-circular epoxy pads are installed in place and then fixed by the pressure plate 5. The through-shaft conductive busbar 2 can pass through the epoxy pads; that is, the epoxy pads are designed with channels that match the through-shaft conductive busbar 2, allowing the through-shaft conductive busbar 2 to pass smoothly through the epoxy pads.

[0025] The inner side of the insulating block 4 contacts and is fixed by the potting compound 3. During installation, the through-shaft conductive busbar 2 is first passed through the deep hole and the angled hole, then the epoxy pad is installed, and finally the potting compound 3 is injected. After curing, the potting compound 3 not only fixes the through-shaft conductive busbar 2, but also contacts the inner side of the epoxy pad to form an integral insulating structure, further improving the insulation performance and structural stability.

[0026] The rotor shaft 1 is provided with a threaded hole, and the pressure plate 5 is fixed to the rotor shaft 1 by bolts to press the insulating block 4. The threaded hole is located on the surface of the rotor shaft 1 near the oblique hole. The bolt passes through the through hole on the pressure plate 5 and is screwed into the threaded hole on the rotor shaft 1, thereby fixing the pressure plate 5 to the rotor shaft 1. The pressure plate 5 applies pressure to the insulating block 4, so that the insulating block 4 can be firmly fixed at the oblique hole.

[0027] In one embodiment, an insulating block 4 is equipped with two pressure plates 5, with a gap between the two pressure plates 5 to allow the through-shaft conductive busbar 2 to pass through. The two pressure plates 5 are located on both sides of the through-shaft conductive busbar 2 and are fixed to the rotor shaft 1 by bolts, jointly applying pressure to the insulating block 4. The gap between the two pressure plates 5 matches the size of the through-shaft conductive busbar 2, allowing the through-shaft conductive busbar 2 to pass smoothly through the gap between the two pressure plates 5, while ensuring that the insulating block 4 is firmly fixed.

[0028] In one embodiment, the through-shaft conductive busbar 2 is a multi-layered flexible conductive sheet. The flexible conductive sheet has good conductivity and flexibility, enabling it to adapt to the shape of the rotor shaft 1 and smoothly pass through deep and oblique holes. The multi-layered design increases the conductive cross-sectional area, improves conductivity, and meets the requirements for high current transmission.

[0029] In practical applications, the assembly process of the rotor through-shaft lead structure is as follows: First, the through-shaft conductive busbar 2 is passed through the deep hole and the oblique hole of the rotor shaft 1; then, a split epoxy pad is installed at the oblique hole; next, the pressure plate 5 is installed and fixed to the rotor shaft 1 with bolts to press the epoxy pad; then, a cover plate 6 is installed at the end of the rotor shaft 1 away from the oblique hole; finally, potting compound 3 is injected through the potting hole on the cover plate 6 to fill the gap between the through-shaft conductive busbar 2 and the deep hole. After the potting compound 3 has cured, the assembly of the rotor through-shaft lead structure is completed.

[0030] The rotor through-shaft lead structure has the following advantages: First, the filling of the through-shaft conductive busbar 2 with potting compound 3 can effectively fix it, preventing it from loosening or shifting due to centrifugal force during high-speed rotor rotation; second, the potting compound 3 has good thermal conductivity, which can conduct the heat generated by the through-shaft conductive busbar 2 during operation to the rotor shaft 1, improving the heat dissipation effect; third, the epoxy pad and the potting compound 3 together form a complete insulation system, ensuring the electrical insulation performance between the through-shaft conductive busbar 2 and the rotor shaft 1; finally, the pressure plate 5 presses and fixes the epoxy pad, reducing the damage to the through-shaft conductive busbar 2 caused by the loosening of the epoxy pad, making the assembly of the entire structure simple and convenient.

[0031] In the embodiments disclosed in this application, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0032] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A rotor through-shaft lead wire structure, characterized in that, include: A rotor shaft, the rotor shaft including a deep hole and an oblique hole connected to the deep hole; A through-shaft conductive busbar, wherein the through-shaft conductive busbar passes through the deep hole and the oblique hole; The space between the through-shaft conductive bus and the deep hole is filled with potting compound; An insulating block is provided between the through-shaft conductive bus and the oblique hole; A pressure plate, which is connected to the rotor shaft by fasteners, is used to press the insulating block.

2. The rotor through-shaft lead structure as described in claim 1, characterized in that: The insulating block is an epoxy pad, which is split in half, and the through-shaft conductive busbar can penetrate the epoxy pad.

3. The rotor through-shaft lead structure as described in claim 2, characterized in that: The inner side of the insulating block is in contact with and fixed by the potting compound.

4. The rotor through-shaft lead structure as described in claim 1, characterized in that: The pressure plate is in at least partial contact with the insulating block, the rotor shaft is provided with a threaded hole, and the pressure plate is fixed to the rotor shaft by bolts for pressing the insulating block.

5. The rotor through-shaft lead wire structure as described in claim 4, characterized in that: One of the insulating blocks is configured with two pressure plates, with a gap between the two pressure plates for the through-shaft conductive busbar to pass through.

6. The rotor through-shaft lead structure as described in claim 1, characterized in that: The through-axis conductive busbar is a multi-layered flexible conductive sheet.

7. The rotor through-shaft lead structure as described in claim 1, characterized in that: A cover plate is provided at the end of the rotor shaft away from the inclined hole, and an injection hole is provided on the cover plate for injecting the potting compound.

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