A conductor bar positioning device

Abstract

This utility model discloses a conductive busbar positioning device, belonging to the field of motor manufacturing. The positioning device includes a fixing plate with a first through hole and a stator pressure ring with a first threaded hole. The fixing plate is connected to the stator pressure ring by bolts passing through the first through hole and the first threaded hole. Using the stator pressure ring as the installation reference for the positioning device improves positioning accuracy. By setting a first positioning plate and a second positioning plate, multiple layers of conductive busbars can be positioned at once, improving positioning efficiency. This utility model's positioning device has high positioning accuracy, is easy to operate, and has a wide range of applications.

Description

Technical Field

[0001] This application relates to the field of motor manufacturing, and more particularly to a conductive busbar positioning device. Background Technology

[0002] Permanent magnet synchronous wind turbines, especially semi-direct drive models, have become the mainstream technology in the current wind energy field due to their high efficiency and reliability. These generators have high power ratings and enormous stator currents. Some models employ a two-set independent three-phase winding design in their stator windings, with current collected through a parallel ring structure. Specifically, there are eight parallel rings at both ends of the stator core, with the current from each phase winding (e.g., U, V, W) collected on the corresponding parallel ring. To carry the large current, three copper busbars with extremely large cross-sections are welded to each phase parallel ring as leads to draw the current out from inside the generator.

[0003] The core technology of this structure lies in the high-precision welding of multiple conductor bars to predetermined circumferential positions on a parallel ring. This places extremely stringent requirements on the circumferential angle of the welding positions and the overall centripetal accuracy. Angular deviations of the conductor bars on the circumference will directly prevent them from aligning with the pre-drilled fixing holes on the generator's rear cover. This can lead to installation difficulties and scratches on the insulation layer, or, in severe cases, mechanical stress during long-term operation causing weld cracking, insulation failure, and serious safety accidents such as short circuits to ground or between phases, jeopardizing the safe operation of the entire wind turbine generator set.

[0004] Currently, the conductive busbar positioning and welding processes commonly used in the industry are extremely primitive and inefficient, mainly relying on manual measurement and marking. The specific steps are as follows: Spacing measurement: The operator uses a ruler or other common tools to roughly measure the spacing between the three conductive bars to be welded on the parallel ring. After visually aligning them, the operator makes preliminary marks by drawing lines with a scribe.

[0005] Welding and fixing: Based on the rough markings, weld the busbars to the parallel ring to form a whole assembly.

[0006] Angle verification and alignment: After welding into a whole, calculate the angle corresponding to each slot according to the stator winding exit angle requirements and mark the theoretical slot number. Then, using tools such as a right-angle ruler, with its vertical side as a reference, try to align the center line of the conductor busbar with the right-angle ruler to finally determine the exit position.

[0007] However, the aforementioned traditional methods have many inherent flaws: Poor positioning accuracy: It relies entirely on the experience and eyesight of workers, and uses non-specialized tools such as rulers and right angle rulers for measurement. Human error is large, and it is impossible to guarantee the accuracy and consistency of the circumferential angle of the conductive busbar, resulting in a low product qualification rate.

[0008] Low production efficiency: The steps of measurement, marking, verification, and adjustment are cumbersome and time-consuming, which seriously restricts the production cycle and cannot meet the needs of large-scale mass production.

[0009] Quality stability is difficult to guarantee: different operators or the same operator at different times may produce different results, resulting in large fluctuations in product quality and making it impossible to achieve standardized operations.

[0010] High risk of rework: Since the final angle verification is carried out only after welding is completed, if the angle deviation is found to be inconsistent with the back cover, there will be extremely high rework costs and repair difficulties, and it may even lead to the scrapping of expensive parallel ring and busbar components.

[0011] Therefore, there is an urgent need to develop a positioning device specifically for this process to solve the problems of low positioning accuracy, poor production efficiency, and reliance on manual experience in the existing technology, so as to fundamentally ensure the consistency, accuracy and reliability of the welding position of the conductive busbar, and ensure the safety and economic efficiency of wind turbines. Utility Model Content

[0012] This invention proposes a conductive busbar positioning device to solve the problems of poor installation and positioning accuracy, low production efficiency, and difficulty in ensuring quality stability of conductive busbars.

[0013] The core technical solution of this utility model is as follows: the positioning device is connected to the stator pressure ring through a connector. The positioning device includes a positioning groove, and the conductive busbar is positioned with the conductive ring through the positioning groove, which improves the installation and positioning accuracy of the conductive busbar and improves the ease of operation.

[0014] The specific technical solution of this application is as follows: A conductor busbar positioning device is provided for positioning the conductor busbar of a motor. The motor includes a stator pressure ring and a conductive ring. The positioning device is connected to the stator pressure ring via a connector. The positioning device includes a positioning groove, through which the conductor busbar is positioned relative to the conductive ring.

[0015] Furthermore, the device includes a fixing plate with a first through hole, and the stator pressure ring has a first threaded hole. The fixing plate is connected to the stator pressure ring by bolts passing through the first through hole and the first threaded hole.

[0016] Furthermore, it includes a positioning plate, which includes at least a first positioning plate and a second positioning plate, the first positioning plate and the second positioning plate being arranged along the axial direction of the motor.

[0017] Furthermore, the fixing plate has a second threaded hole for installing a screw. There are three second threaded holes, and there are three screws.

[0018] Furthermore, the first positioning plate, the second positioning plate, and the fixing plate are arranged in parallel, and the screw passes through the first positioning plate and the second positioning plate in sequence and is fixed thereto.

[0019] Furthermore, the conductive busbar includes a lower conductive busbar, which cooperates with the first positioning plate, and the first positioning plate positions the lower conductive busbar in the conductive ring.

[0020] Furthermore, the conductive busbar includes an upper conductive busbar, which cooperates with the second positioning plate, and the second positioning plate positions the upper conductive busbar at the position of the conductive ring.

[0021] Furthermore, the motor includes windings, which include U-rings, V-rings, and W-rings, each with three conductive busbars.

[0022] This utility model has the following technical effects: the positioning device is connected to the stator pressure ring through a connector, and by utilizing the existing structure of the motor, the accuracy and convenience of installation and positioning are improved; by setting a first positioning plate and a second positioning plate, multiple layers of conductive busbars can be positioned at once, improving positioning efficiency; the first positioning plate and the second positioning plate are connected to the fixing plate through screws, and their relative positions are adjustable to meet the needs of different scenarios and improve adaptability. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a conductive busbar positioning device in one embodiment of the present invention; Figure 2 This is a schematic diagram of a conductive busbar positioning device positioning conductive busbar in one embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures: 1. Fixing plate; 2. Screw; 3. First positioning plate; 4. Second positioning plate; 5. Conductive busbar; 6. Conductive ring; 7. Stator pressure ring. Detailed Implementation

[0025] 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.

[0026] In this specification, identical components 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, while 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.

[0027] The positioning device of this utility model is used for positioning the conductive busbar 5 of a motor. The motor includes a stator pressure ring 7 and a conductive ring 6. Figure 2 This is a schematic diagram of a positioning device for conductive busbar 5. The positioning device is connected to the stator pressure ring 7 via a connector. The positioning device includes a positioning groove, through which conductive busbar 5 is positioned with conductive ring 6. Figure 1 As shown, a schematic diagram of the positioning device of the conductive busbar 5 in one embodiment is provided. The positioning device includes a fixing plate 1 with a first through hole and a stator pressure ring 7 with a first threaded hole. The fixing plate 1 is connected to the stator pressure ring 7 by bolts passing through the first through hole and the first threaded hole.

[0028] By utilizing the stator retaining ring 7, a key structural component of the motor body, as the installation reference for the positioning device, and because the stator retaining ring 7 possesses extremely high machining and positional accuracy during motor assembly, and its position directly determines the final assembly relationship of the rear end cover, the positioning reference of the conductive busbar 5 and the final inspection reference are unified. This ensures the correctness of the welding position of the conductive busbar 5 from a process principle perspective, greatly improving the reliability of the product.

[0029] The positioning device includes positioning plates, at least a first positioning plate 3 and a second positioning plate 4, which are arranged along the motor axis. The fixing plate 1 has a second threaded hole for mounting a screw 2. The mounted screw 2 is parallel to the motor axis. To improve the stability of the positioning device structure, three second threaded holes are provided, and there are three screws 2. One screw 2 is installed in one second threaded hole, constituting one group. The positioning device has three groups. The first positioning plate 3 and the second positioning plate 4 are arranged parallel to the fixing plate 1 during installation. The screw 2 passes through and is fixed to the first positioning plate 3 and the second positioning plate 4 sequentially.

[0030] The aforementioned structure significantly enhances the rigidity and overall stability of the positioning device: by setting a first positioning plate 3 and a second positioning plate 4 arranged parallel to the motor axis, and rigidly connecting them with three screws 2 parallel to the motor axis, a robust multi-support spatial frame structure is formed. This structure effectively resists deformation and vibration of the positioning device caused by the weight of the conductive busbar 5 and external forces during welding operations, and in particular eliminates the possibility of minute radial and tangential displacements of the positioning plates. The symmetrical arrangement of the three sets of screws 2 provides statically indeterminate constraints, ensuring that the entire device maintains extremely high geometric stability under working conditions, which is the fundamental prerequisite for achieving high-precision positioning.

[0031] Improved resistance to thermal deformation and welding process reliability: Welding generates concentrated heat, which may cause localized thermal expansion of components. The connection system consisting of three screws 2 can uniformly and stably maintain the relative position between the two positioning plates. Even with localized heating, the overall structure can maintain dimensional integrity and prevent misalignment of the positioning grooves due to thermal deformation. This provides a crucial stable environment for obtaining high-quality, stress-free welds.

[0032] The motor includes windings, which include U-rings, V-rings, and W-rings. Each of the U-rings, V-rings, and W-rings has three conductive bars 5. In some embodiments, the motor includes two sets of windings. The conductive bars 5 include a lower conductive bar 5, which cooperates with a first positioning plate 3. The first positioning plate 3 positions the lower conductive bar 5 in the conductive ring 6. The conductive bars 5 also include an upper conductive bar 5, which cooperates with a second positioning plate 4. The second positioning plate 4 positions the upper conductive bar 5 in the conductive ring 6.

[0033] This invention achieves precise constraint and attitude control of the multi-layer conductive busbar 5: a single-layer positioning plate can only provide constraint on a single layer of conductive busbar 5. This invention, through the positioning grooves on the first positioning plate 3 and the second positioning plate 4, enables simultaneous constraint at multiple positions on the same multi-layer conductive busbar 5. This provides precise positioning for the conductive busbar 5 and more strictly limits its degrees of freedom of tilting, swaying, and rotation.

[0034] This invention optimizes assembly processability and ease of operation: the structure is ingeniously designed and the assembly process is clear. During operation, the three screws 2 are first installed on the fixing plate 1, then the first and second positioning plates 4 are sequentially fitted and adjusted to the required axial distance before tightening. This process is simple and quick, easily ensuring assembly accuracy. The layered structure also facilitates observation and operation by the operator.

[0035] The device's versatility and adjustability have been enhanced: the axial distance between the two positioning plates can be flexibly adjusted, allowing the positioning device to adapt to conductive busbars of different lengths or lead-out positions, greatly improving the device's versatility and applicability, and reducing the cost of specially manufactured tooling for different product models.

[0036] 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.

[0037] 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 conductive busbar positioning device for positioning the conductive busbar of a motor, characterized in that, The motor includes a stator pressure ring and a conductive ring. The positioning device is connected to the stator pressure ring via a connector. The positioning device includes a positioning groove, and the conductive busbar is positioned with the conductive ring via the positioning groove.

2. The conductive busbar positioning device according to claim 1, characterized in that, The device includes a fixing plate with a first through hole, and a stator pressure ring with a first threaded hole. The fixing plate is connected to the stator pressure ring by bolts passing through the first through hole and the first threaded hole.

3. The conductive busbar positioning device according to claim 2, characterized in that, The device includes a positioning plate, which includes at least a first positioning plate and a second positioning plate, and the first positioning plate and the second positioning plate are arranged along the axial direction of the motor.

4. The conductive busbar positioning device according to claim 3, characterized in that, The fixing plate has a second threaded hole for installing a screw. There are three second threaded holes, and there are three screws.

5. The conductive busbar positioning device according to claim 4, characterized in that, The first positioning plate, the second positioning plate, and the fixing plate are arranged in parallel, and the screw passes through the first positioning plate and the second positioning plate in sequence and is fixed thereto.

6. The conductive bar positioning device according to claim 5, characterized in that, The conductive busbar includes a lower conductive busbar, which cooperates with the first positioning plate, and the first positioning plate positions the lower conductive busbar in the conductive ring.

7. The conductive bar positioning device according to claim 6, characterized in that, The conductive busbar includes an upper conductive busbar, which cooperates with the second positioning plate, and the second positioning plate positions the upper conductive busbar in the conductive ring.

8. The conductive bar positioning device according to claim 7, characterized in that, The motor includes windings, which include U-rings, V-rings, and W-rings, each with three conductive busbars.

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