Motor core-pulling maintenance tool
By designing a tool suitable for motor core pulling, which uses semi-elliptical hollow steel tubes for connection and clamp fixation, combined with a level and rubber pad protection, the problems of low efficiency and poor stability of existing motor core pulling tools are solved, realizing an efficient and stable motor core pulling process, suitable for motors of different sizes and models.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENGLI PETROCHEMICAL (DALIAN) REFINING & CHEM CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-21
AI Technical Summary
Existing motor core-pulling repair tools and methods consume a lot of manpower, have low work efficiency, poor stability, pose safety hazards, and are difficult to adapt to motors of different sizes and models, increasing the complexity of repair work and the difficulty of resource preparation.
A motor core-pulling and repair tool was designed, comprising an upper semi-elliptical cylindrical tube, a lower semi-elliptical cylindrical tube, a connecting component, a reinforcing plate, a connecting bend plate, a crossbeam boom, and a lifting ring. It adopts a semi-elliptical hollow steel tube butt joint design, uses clamps to fix the rotor, is equipped with a level to monitor the tool's levelness, and has rubber pads on the inner wall to protect the rotor surface, forming a right-angle structure to maintain balance, thereby enhancing the tool's stability and versatility.
It effectively reduces manpower input, improves the stability and efficiency of motor core pulling, reduces production losses and costs caused by maintenance, and ensures the stable operation of the chemical plant.
Smart Images
Figure CN224147524U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor repair technology, specifically a motor core-pulling repair tool. Background Technology
[0002] In the production and operation of chemical plants, large and medium-sized asynchronous or synchronous motors play a crucial role. The rotors of these motors can weigh several tons or even tens of tons, with power ranging from hundreds to tens of thousands of kilowatts. The gap between the rotor and stator is extremely narrow, only a few millimeters. Traditional core-pulling repairs rely on crane assistance; however, this method has many drawbacks. When using a crane for core-pulling repairs, it is very easy for the rotor to come into contact with the stator due to improper operation, resulting in coil damage. Once this happens, it not only delays the repair progress and increases maintenance costs but also seriously affects the normal production order of the plant. Although various core-pulling tools and methods for motor repairs exist, they all have varying degrees of shortcomings.
[0003] First, existing core-pulling tools and methods are labor-intensive; for example, core-pulling in high-voltage motors typically requires five or six people working together, resulting in low efficiency. Second, the core-pulling process lacks stability, making it difficult to effectively control rotor oscillation. Even slight negligence can damage the stator and windings, posing a significant safety hazard. Furthermore, different sizes and models of motors require correspondingly long steel pipes of varying diameters, which must be prepared in advance, undoubtedly increasing the complexity of maintenance work and the difficulty of resource preparation. Utility Model Content
[0004] In view of the shortcomings of the existing technology, this utility model provides a motor core-pulling repair tool, which has the characteristics of high efficiency, stability and convenience, and can effectively reduce manpower input and control rotor movement.
[0005] To achieve the above objectives, the present invention provides a motor core-pulling repair tool, comprising an upper semi-elliptical cylindrical tube, a lower semi-elliptical cylindrical tube, a connecting assembly, a reinforcing plate, a connecting bend plate, a crossbeam boom, and a lifting ring. The lower semi-elliptical cylindrical tube is connected to the upper semi-elliptical cylindrical tube to form an elliptical cylindrical tube. The connecting assembly includes two clamps that encircle the elliptical cylindrical tube, and the two clamps are detachably connected. One end of the reinforcing plate is fixed to the upper semi-elliptical cylindrical tube, and the reinforcing plate is perpendicular to the central axis of the elliptical cylindrical tube. One end of the connecting bend plate is fixed to the other end of the reinforcing plate. One end of the crossbeam boom is fixed to the other end of the connecting bend plate, and the crossbeam boom is parallel to the central axis of the elliptical cylindrical tube. A lifting section is provided on the crossbeam boom. The lifting ring is connected to the lifting section through a connector.
[0006] Furthermore, the hoisting section includes a plurality of hoisting holes opened along the length direction of the beam boom.
[0007] Furthermore, the connector includes a connecting pin.
[0008] Furthermore, the beam boom is equipped with a level, which is set parallel to the central axis of the elliptical cylindrical tube.
[0009] Furthermore, the inner walls of the upper and lower semi-elliptical cylindrical tubes are lined with rubber gaskets.
[0010] Furthermore, the end of the reinforcing plate away from the upper semi-elliptical cylindrical tube is provided with a welding bevel, and the end of the connecting bent plate is engaged with the welding bevel and welded inside the welding bevel.
[0011] Furthermore, two welding bevels are provided, one on each side of the same end of the reinforcing plate, and the sum of the widths of the welding bevels is greater than or equal to half the width of the reinforcing plate.
[0012] Furthermore, the reinforcing plate is rectangular.
[0013] Furthermore, the beam boom is rectangular.
[0014] Furthermore, the two clamps are connected by fixing nuts and fixing bolts.
[0015] The beneficial effects of this utility model are: it can effectively reduce manpower input, control rotor movement, and has strong versatility, eliminating the need to frequently replace the matching steel pipes for different motors, thereby significantly improving the quality and efficiency of maintenance work for large and medium-sized motors, reducing production losses and cost increases caused by maintenance, and ensuring the stable and continuous operation of chemical plant production activities. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a motor core-pulling and repair tool according to one embodiment of the present invention;
[0017] Figure 2 This is a perspective view of a motor core-pulling and repair tool according to one embodiment of the present invention;
[0018] Figure 3 This is a schematic diagram of a motor core-pulling repair tool used to repair rotors with small shaft diameters, showing a clamp encircling an elliptical cylindrical tube.
[0019] Figure 4 This is a schematic diagram of a motor core-pulling repair tool used to repair rotors with large shaft diameters, in one embodiment of the present invention, showing a clamp encircling an elliptical cylindrical tube.
[0020] Figure 5 This is a schematic diagram of the structure of a motor core-pulling and repair tool according to another embodiment of the present invention;
[0021] In the picture:
[0022] 100. Upper semi-elliptical cylinder; 110. Rubber pad.
[0023] 200. Lower semi-elliptical cylinder; 210. Rubber pad.
[0024] 300. Connecting component; 310. Clamp; 320. Fixing nut; 330. Fixing bolt.
[0025] 400, reinforcing plate; 410, welding bevel.
[0026] 500. Connecting bend plate; 510. Bevel for bend plate welding.
[0027] 600. Horizontal beam boom; 610. Lifting unit; 620. Level.
[0028] 700, Rings
[0029] 800, central axis,
[0030] 900. Connectors
[0031] 10. Shaft; 20. Rotor. Detailed Implementation
[0032] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0033] See Figure 1 and Figure 2The diagram shows a schematic of the structure of a motor core-pulling repair tool according to an embodiment of the present invention. It includes an upper semi-elliptical cylindrical tube 100, a lower semi-elliptical cylindrical tube 200, a connecting component 300, a reinforcing plate 400, a connecting bending plate 500, a crossbeam boom 600, and a lifting ring 700. The lower semi-elliptical cylindrical tube 200 is connected to the upper semi-elliptical cylindrical tube 100 to form an elliptical cylindrical tube. The connecting component 300 includes two clamps 310 that encircle the elliptical cylindrical tube, and the two clamps 310 are detachably connected. One end of the reinforcing plate 400 is fixed to the upper semi-elliptical cylindrical tube 100, and the reinforcing plate 400 is set perpendicular to the central axis 800 of the elliptical cylindrical tube; one end of the connecting bend plate 500 is fixed to the other end of the reinforcing plate 400; one end of the crossbeam boom 600 is fixed to the other end of the connecting bend plate 500, and the crossbeam boom 600 is set parallel to the central axis 800 of the elliptical cylindrical tube, and a lifting part 610 is provided on the crossbeam boom 600; the lifting ring 700 is connected to the lifting part 610 through the connector 900.
[0034] To address the issues of rotor 20 being prone to wobbling and instability during core pulling, and the risk of damaging the stator and windings, such as... Figure 3 and Figure 4 As shown, when using the above-mentioned motor core-pulling repair tool, the shaft 10 is fixed by a design of two semi-elliptical hollow steel pipes joined together, and at the same time, it is fixed by two clamps. It can be used for rotors 20 with different shaft diameters, which greatly improves the versatility and practicality of the tool.
[0035] In one embodiment, the lifting unit 610 includes a plurality of lifting holes along the length of the beam boom 600. The beam boom 600 has a plurality of lifting holes, which can be used to hang one or more manual hoists as needed.
[0036] In one embodiment, the connector 900 includes a connecting pin.
[0037] In one embodiment, the beam boom 600 is equipped with a level 620, which is parallel to the central axis 800 of the elliptical cylindrical tube. In this embodiment, the level 620 is located on the upper part of the beam boom 600, which can monitor the levelness of the beam boom 600 in real time. The operator can accurately adjust the level of the beam boom according to the display of the level, ensuring that the tool is in a stable working state during the core pulling process.
[0038] The aforementioned motor core-pulling repair tool is equipped with a reinforcing plate 400, a connecting bend plate 500, and a crossbeam boom 600, forming a right-angle structure. When in use, a suitable lifting hole can be selected so that the center of gravity is located in the middle position when lifting the motor, thereby better maintaining balance and stability during the lifting operation. This effectively reduces instability caused by center of gravity shift, providing a more reliable and efficient solution for core-pulling repair of large and medium-sized motors.
[0039] like Figure 3 and Figure 4 As shown, in one embodiment, the inner walls of the upper semi-elliptical cylindrical tube 100 and the lower semi-elliptical cylindrical tube 200 are lined with rubber pads 110 and 210. The rubber pads 110 and 210 on the inner walls of the two semi-elliptical cylindrical tubes can effectively prevent damage to the shaft surface when disassembling the shaft. In addition, the rubber pads 110 and 210 can deform according to the size of the clamped and fixed shaft 10, and fit the outer diameter of the shaft 10 to a greater extent, which can make the motor core pulling more stable.
[0040] See also Figure 5 In one embodiment, a welding bevel 410 is provided at the end of the reinforcing plate 400 away from the upper semi-elliptical cylindrical tube 100. The end of the connecting bend 500 mates with the welding bevel 410 and is welded inside the welding bevel 410. Preferably, the welding bevel 410 is set to a 45° bevel to increase the welding range and make the weld more robust. Similarly, a bend welding bevel 510 can also be provided at the end of the connecting bend 500 away from the reinforcing plate 400, and the end of the beam boom 600 can mate with it and be welded inside, further enhancing the fixing strength between the beam boom 600 and the connecting bend 500.
[0041] Furthermore, in one embodiment, two welding bevels 410 are provided, respectively on the left and right sides of the same end of the reinforcing plate 400, and the sum of the widths of the welding bevels 410 is greater than or equal to half the width of the reinforcing plate 400.
[0042] In this embodiment, the reinforcing plate 400 is located between the upper semi-elliptical cylindrical tube 100 and the connecting bend plate 500. It is rectangular and 6 cm wide, providing a solid supporting foundation for the overall structure. The reinforcing plate 400 has a 3 cm wide concave welding bevel 410. The upper semi-elliptical cylindrical tube 100 is welded to the bottom of the reinforcing plate 400, and the connecting bend plate 500 is welded to the welding bevel 410. A four-sided welding method is used, ensuring the weld layer is located on the connecting bend plate 500. This makes the connection between components more stable and greatly enhances the overall stability of the tool. The crossbeam boom 600 is welded to the right end of the connecting bend plate 500, and a lifting hole is provided through it. The lifting ring 700 is installed in the lifting hole of the crossbeam boom 600. This structural design facilitates the connection and operation of the tool with external lifting equipment.
[0043] In one embodiment, the reinforcing plate 400 is rectangular.
[0044] In one embodiment, the beam boom 600 is rectangular.
[0045] See Figure 3 and Figure 4In one embodiment, the two clamps 310 are connected by a fixing nut 320 and a fixing bolt 330.
[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0047] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intermediate element present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element present. The terms "vertical," "horizontal," "above," "below," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible embodiments.
Claims
1. A motor core-drawing overhauling tool, characterized by: include Upper semi-elliptical cylindrical tube; The lower semi-elliptical cylindrical tube is connected to the upper semi-elliptical cylindrical tube to form an elliptical cylindrical tube; The connecting assembly includes two clamps that encircle the elliptical cylindrical tube, and the two clamps are detachably connected; A reinforcing plate is fixed at one end to the upper semi-elliptical cylindrical tube, and the reinforcing plate is arranged perpendicular to the central axis of the elliptical cylindrical tube; A connecting bent plate is fixed at one end to the other end of the reinforcing plate; A beam boom is fixed at one end to the other end of the connecting bent plate, and the beam boom is arranged parallel to the central axis of the elliptical cylindrical tube. A lifting part is provided on the beam boom. The lifting ring is connected to the lifting unit via a connector.
2. A motor core pulling servicing tool according to claim 1, characterized in that: The inner walls of the upper and lower elliptical cylindrical tubes are lined with rubber gaskets.
3. A motor core pulling servicing tool according to claim 1, characterized in that: The hoisting section includes multiple hoisting holes opened along the length of the beam boom.
4. A motor core pulling servicing tool according to claim 1, characterized in that: The connector includes a connecting pin.
5. A motor core pulling servicing tool according to claim 1, characterized in that: The horizontal beam boom is equipped with a level, which is set parallel to the central axis of the elliptical cylindrical tube.
6. A motor core pulling servicing tool according to claim 1, characterized in that: The reinforcing plate has a welding bevel at one end away from the upper semi-elliptical cylindrical tube, and the end of the connecting bent plate is fitted with the welding bevel and welded inside the welding bevel.
7. A motor core pulling servicing tool according to claim 6, characterized in that: Two welding bevels are provided, one on each side of the same end of the reinforcing plate, and the sum of the widths of the welding bevels is greater than or equal to half the width of the reinforcing plate.
8. A motor core pulling servicing tool according to any one of claims 1-7, characterized in that: The reinforcing plate is rectangular.
9. A motor core pulling servicing tool according to any one of claims 1-7, characterized in that: The beam boom is rectangular.
10. A motor core pulling servicing tool according to any one of claims 1-7, characterized in that: The two clamps are connected by fixing nuts and fixing bolts.