A rotor coil end forming device

Abstract

The application discloses a rotor coil end forming device and relates to the technical field of rotor coil assembly. The application is easy to manage, guarantees the shape and inner diameter size of the rotor coil end, can be directly and integrally sleeved on a shaft for use during assembly, improves production efficiency, guarantees assembly quality completely by means of tools, is not influenced by human factors, and reduces the influence of human factors.

Description

Technical Field

[0001] This invention relates to the field of rotor coil assembly technology, and more specifically to a rotor coil end forming apparatus. Background Technology

[0002] In the assembly of existing steam turbine generator rotor coils, coil end forming is an essential process to ensure the shape and size of the coil ends. Since the coil ends are suspended between the coil ends and the shaft, tools must be used to support and maintain the coil shape. Therefore, the coil assembly device is a key piece of equipment in the coil assembly process. Current steam turbine generator rotor coil end forming devices use scattered tooling, which is numerous, easily deformed, and difficult to store and manage. Individual insulating block tooling pieces are manually placed one by one onto the shaft handle and secured with straps. Finally, the position is adjusted according to the drawings. Assembly quality is greatly affected by human factors, requiring 2-3 operators. The installation process is complex and time-consuming; the assembly effect varies from person to person, and it is highly dependent on the operator's skill level.

[0003] The prior art includes a Chinese invention patent document with publication number CN110798032A and publication date of February 14, 2020. The technical solution disclosed in this patent document is as follows:

[0004] This invention provides a modular assembly fixture for generator rotor coils and its usage method, belonging to the field of turbine generator rotor coil assembly technology. It includes an outer pad, an inner pad, and a No. 1 coil pad. An outer pad is placed below the No. 1 coil pad, and an inner pad is placed below the outer pad. The corresponding mating surfaces of the outer and inner pads are inclined surfaces. The outer and inner pads are installed on the circumference surrounding the outer circle of the generator rotor coil end. After installing the pads, the generator rotor coil is assembled on the pads. After assembling the rotor coil, the pad fixture is disassembled, completing the assembly of the generator rotor coil. This invention features a simple assembly fixture structure, replaceable components, convenient and quick assembly and disassembly, high component strength, short design and manufacturing cycle, and economical and reasonable manufacturing cost.

[0005] The aforementioned prior art provides a modular assembly tooling and method for generator rotor coils. It features a simple structure, interchangeable components, convenient and quick assembly and disassembly, high strength, and ensures the assembly quality of the generator rotor coils. Different sized modular components can be designed according to the rotor coil dimensions of different products, enabling interchangeability between assembly tooling components for generator rotor coils of various grades, forming a universal tooling for a series of generator products. It boasts advantages such as short design and manufacturing cycles, low manufacturing costs, and economic rationality. However, the above structure has the following disadvantages: a large number of wooden blocks and strips, making management difficult, occupying a large area, and prone to loss; it is composed of many parts, with an outer polygonal shape, requiring high operator skill during assembly, and the molding quality and consistency cannot be guaranteed; the fragmented tooling is prone to deformation, requiring replacement and causing some waste. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention proposes a rotor coil end forming device, which solves the problems of complex installation process, long time, and easy deformation of parts, improves production efficiency, and more effectively ensures the quality of the coil ends.

[0007] This invention is achieved by adopting the following technical solution:

[0008] A rotor coil end forming device includes an insulating barrel, a conical barrel, and an annular barrel. The insulating barrel includes multiple insulating blocks with inclined bottom surfaces. The insulating blocks are clamped together by elastic members to form the insulating barrel. The insulating barrel is disposed on the outside of the conical barrel. The insulating barrel is in contact with the inclined surface of the conical barrel. The inside of the conical barrel is in contact with the annular barrel. A support block is provided on the insulating barrel.

[0009] Furthermore, the insulating barrel is equipped with lifting screws.

[0010] Furthermore, the lifting screw passes through the insulating barrel, the conical barrel, and the annular barrel, with an opening on the conical barrel.

[0011] Furthermore, the conical barrel is a conical aluminum barrel.

[0012] Furthermore, the annular barrel is an annular steel barrel.

[0013] Furthermore, the end face of the annular barrel is provided with a lifting eye screw.

[0014] Furthermore, a positioning screw is provided between the insulating block and the conical barrel.

[0015] Furthermore, the insulating block is provided with a groove, and an elastic element is disposed in the groove, the elastic element being a spring.

[0016] Furthermore, a spring plate is provided on one side of the insulating block, and the spring plate is connected to the end face of the annular barrel by bolts. An opening is provided at the end of the annular barrel.

[0017] Furthermore, the annular barrel has a bolt and a movable pressure block at the end opening.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. In this invention, the rotor coil end forming device is an integral structure with an inner and outer three-layer structure. The outermost circle is an insulating barrel. This device is in direct contact with the bottom of the rotor coil and requires electrical testing during the forming process. Therefore, insulating material is used. From the outside to the inside, there are an insulating barrel, a conical barrel, and an annular barrel. The insulating barrel and the conical barrel use a beveled fit. The insulating barrel includes multiple insulating blocks with inclined bottom surfaces. The insulating blocks are clamped together by elastic elements to form a whole. This device is easy to manage, ensures the shape and inner diameter of the rotor coil end, and can be used directly by fitting the whole onto the shaft during assembly. This improves production efficiency. The assembly quality is entirely guaranteed by the tool and is not affected by human factors, thus reducing the impact of human factors. It has a high reusability rate and, in the long run, can save resources and costs. It is convenient and quick to assemble and disassemble, requires low operator skills, and is easy to store.

[0020] 2. In this invention, the insulating bucket is equipped with lifting screws to facilitate overall lifting and disassembly.

[0021] 3. In this invention, the lifting screw passes through the insulating barrel, the conical barrel, and the annular barrel, improving the overall performance of the device and serving to fix the structure, further increasing the stability of the device. At the same time, it reduces the load requirements on the insulating block, reduces damage to components caused by uneven force during lifting, and increases the safety during lifting. Meanwhile, the conical barrel has an opening, allowing the conical barrel to move on the lifting screw during installation and disassembly. When the conical barrel moves, it will not affect the connection relationship of the lifting screw, eliminating the need to install and disassemble the lifting screw, reducing installation and disassembly steps, lowering the installation difficulty, and improving the stability and safety performance of the device.

[0022] 4. In this invention, the conical barrel is a conical aluminum barrel with an aluminum barrel in the middle as a transition section. It is relatively light in weight while meeting the required mechanical strength, thereby reducing the overall weight of the tool and making it easy to assemble and disassemble.

[0023] 5. In this invention, the annular barrel is a ring-shaped steel barrel. The annular barrel is the foundation of the entire device, and all components are assembled on the basis of the annular barrel. The steel barrel is used to further ensure the integrity and mechanical strength of this tool.

[0024] 6. In this invention, the end face of the annular barrel is provided with a lifting eye screw. During disassembly, the entire device can be removed through the provided lifting eye screw, making it convenient to remove the device.

[0025] 7. In this invention, a positioning screw is provided between the insulating block and the conical barrel to limit the axial movement range of the aluminum barrel, making the insulating block and the conical barrel fit more stably, the whole device is more stable, has higher safety performance, and is easy to disassemble.

[0026] 8. In this invention, the insulating block is provided with a groove, and the elastic element is set in the groove, so that the setting of the elastic element does not affect the overall shape of the device, improves the accuracy of the device, and fixes the elastic element to prevent the elastic element from shifting. According to the actual use, the elastic element is a spring.

[0027] 9. In this invention, a spring plate is provided between the insulating block and the annular barrel, and is connected to the end face of the annular barrel by bolts. This can provide axial constraint to the device, improve the overall integrity of the device, increase the strength and quality of the device, and make the whole device more stable. At the same time, the bolt connection facilitates the disassembly and installation of the device. The end of the annular barrel is provided with an opening to leave a gap for easy disassembly and can also be used to install connecting parts, further increasing the overall integrity of the device.

[0028] 10. In this invention, a bolt and a movable pressure block are provided at the opening at the end of the annular barrel. The movable pressure block and the bolt that cooperate with it can be used to push the conical barrel, thereby shrinking the outer diameter of the insulating block and allowing the entire device to be removed. This setting further reduces the difficulty of disassembly and prevents the conical barrel from being damaged by force, thus improving the service life of the device. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0030] Figure 1 This is a three-dimensional schematic diagram of Embodiment 2 of the present invention;

[0031] Figure 2 This is a front view of Embodiment 2 of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0033] Figure 4 This is a schematic diagram of the annular barrel structure of Embodiment 3 of the present invention;

[0034] Figure 5 This is a front view of the annular barrel according to Embodiment 3 of the present invention;

[0035] Figure 6 This is a front view of the conical barrel and the annular barrel when they are attached in Embodiment 3 of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the conical barrel and the annular barrel when they are attached in Embodiment 3 of the present invention;

[0037] Figure 8 This is a schematic diagram showing the connection between the insulating barrel and the conical barrel in Embodiment 3 of the present invention;

[0038] Figure 9 This is a front view of the spring plate according to Embodiment 4 of the present invention;

[0039] Figure 10 This is a side view of the spring plate according to Embodiment 4 of the present invention;

[0040] Figure 11 This is a schematic diagram of the connection of the movable pressure block in Embodiment 4 of the present invention.

[0041] Marked in the image:

[0042] 1. Ring-shaped barrel, 2. Conical barrel, 3. Positioning screw, 4. Spring, 5. Lifting screw, 6. Insulating block, 7. Coil end support block, 8. Eye bolt, 9. Coil straight support block, 10. Spring plate, 11. Bolt, 12. Bolt, 13. Movable pressure block. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0044] Unless otherwise defined, the technical or scientific terms used in this invention should be understood in their ordinary sense by one of ordinary skill in the art to which this invention pertains. The terms "comprising" or "including," and similar words used in this invention disclosure, mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0046] Example 1

[0047] As a preferred embodiment of the present invention, this embodiment discloses a rotor coil end forming device, including an insulating barrel, a conical barrel 2 and an annular barrel 1. The insulating barrel includes a plurality of insulating blocks 6 with inclined bottom surfaces. The insulating blocks 6 are clamped together by elastic members to form the insulating barrel. The insulating barrel is disposed on the outside of the conical barrel 2. The insulating barrel is in contact with the inclined surface of the conical barrel 2. The inside of the conical barrel 2 is in contact with the annular barrel 1. A support block is provided on the insulating barrel.

[0048] In this embodiment, the conical barrel 2 is pulled outward to the set position so that the outer circle of the insulation reaches the required size. The tool is then lifted as a whole and fitted onto the rotating shaft for use. This improves production efficiency, reduces human error, and more effectively ensures the quality of the coil ends, improving the assembly quality of the rotor coil and thus enhancing the safety and reliability of rotor operation. During disassembly, a thin insulating rod can be inserted through the gap between the annular barrel 1 and the insulation barrel, passing through the end face of the annular barrel 1 and contacting the conical barrel 2. The insulating rod is then tapped to loosen the conical barrel 2. Then, the rod is inserted through the gap between the end face of the annular barrel 1 and the insulation barrel towards the rotating shaft body. The top conical barrel 2 causes the outer diameter of the insulating block 6 to shrink, allowing the entire device to be removed. The insulating barrel is equipped with a support block, which is used for straight or end support of the rotor coil. This embodiment is easy to manage, ensures the shape and inner diameter of the rotor coil end, and can be used by simply fitting the whole device onto the shaft during assembly, improving production efficiency. Assembly quality is entirely guaranteed by tools and is not affected by human factors, thus reducing human factors. It has a high reusability rate and, in the long run, can save resources and costs. It is convenient and quick to assemble and disassemble, requires low operator skills, is easy to store, and is easy to manage.

[0049] Example 2

[0050] As another preferred embodiment of the present invention, please refer to the appendix to the specification. Figures 1-3 This embodiment discloses a rotor coil end forming device, including an insulating barrel, a conical barrel 2, and an annular barrel 1. The insulating barrel includes multiple insulating blocks 6 with inclined bottom surfaces. The insulating blocks 6 are clamped together by elastic members to form the insulating barrel. The insulating barrel is disposed outside the conical barrel 2, and the insulating barrel is in contact with the inclined surface of the conical barrel 2. The inside of the conical barrel 2 is in contact with the annular barrel 1. A coil straight support block 9 and a coil end support block 7 are provided on the insulating barrel. A lifting screw 5 is provided on the insulating block 6, and the lifting screw 5 passes through the insulating barrel, the conical barrel 2, and the annular barrel 1. The ring-shaped barrel 1 and the conical barrel 2 are provided with openings. The conical barrel 2 is a conical aluminum barrel, and the ring-shaped barrel 1 is a ring-shaped steel barrel. The end face of the ring-shaped barrel 1 is provided with a lifting eye screw 8. The insulating block 6 is provided with a positioning screw 3 between it and the conical barrel 2. The insulating block 6 is provided with a groove, and an elastic element is provided in the groove. The elastic element is a spring 4. A spring plate 10 is provided on one side of the insulating block 6. The spring plate 10 is connected to the end face of the ring-shaped barrel 1 by a bolt 11. The end of the ring-shaped barrel 1 is provided with an opening. A bolt 12 and a movable pressure block 13 are provided at the opening at the end of the ring-shaped barrel 1.

[0051] This embodiment consists of an insulating bucket, a conical aluminum bucket, and a ring-shaped steel bucket from the outside in. The steel bucket ensures the integrity and strength of the tool. Each component is assembled on the steel bucket base, with the aluminum bucket serving as a transition section. The aluminum bucket, while meeting the required mechanical strength, is lightweight, reducing the overall weight of the tool and facilitating assembly and disassembly. The insulating block 6 has a groove, and an elastic element (spring 4) is placed within the groove. This elastic element does not affect the overall shape of the device, improving its accuracy, and simultaneously securing the elastic element to prevent it from slipping. When disassembly occurs, a thin insulating rod can be inserted through the opening on the annular barrel 1, passing through the end face of the annular barrel 1, and contacting the conical barrel 2. The insulating rod is then struck to loosen the conical barrel 2. Then, the conical barrel 2 is pushed against the shaft body side by the bolt 12 and the movable pressure block 13 located at the opening on the end face of the annular barrel 1, thereby shrinking the outer diameter of the insulating block 6. The entire device can then be removed. This embodiment is aesthetically pleasing, easy to manage, has high overall performance, is convenient to install and disassemble, has a clever design, improves the assembly quality of the rotor coil, thereby enhancing the safety and reliability of rotor operation, and has a high reusability rate.

[0052] Example 3

[0053] As another preferred embodiment of the present invention, please refer to the appendix to the specification. Figures 4-8 This embodiment discloses a rotor coil end forming device, including an insulating barrel, a conical barrel 2, and an annular barrel 1. The insulating barrel includes multiple insulating blocks 6 with inclined bottom surfaces. The insulating blocks 6 are clamped together by elastic members to form the insulating barrel. The insulating barrel is disposed on the outside of the conical barrel 2. The insulating barrel is in contact with the inclined surface of the conical barrel 2. The inside of the conical barrel 2 is in contact with the annular barrel 1. The insulating barrel is provided with a coil straight support block 9 and a coil end support block 7. The annular barrel 1 is an annular steel barrel. A positioning screw 3 is provided between the insulating block 6 and the conical barrel 2. The insulating block 6 is provided with a groove, and an elastic member is disposed in the groove. The elastic member is a spring 4. The annular barrel 1 is provided with an opening at its end.

[0054] This embodiment consists of an insulating barrel, a conical aluminum barrel, and an annular steel barrel from the outside in. The steel barrel is used to ensure the integrity and strength of the tool. During disassembly, a thin insulating rod can be inserted through the opening on the annular barrel 1, passing through the end face of the annular barrel 1, and contacting the conical barrel 2. The insulating rod is then struck to loosen the conical barrel 2. Then, the conical barrel 2 is pushed towards the shaft body through the opening on the end face of the annular barrel 1, thereby shrinking the outer diameter of the insulating block 6, allowing the entire device to be removed. This embodiment is aesthetically pleasing, easy to manage, has high overall performance, is convenient to install and disassemble, has an ingenious design, improves the assembly quality of the rotor coil, thereby enhancing the safety and reliability of rotor operation, and has a high reusability rate.

[0055] Example 4

[0056] As another preferred embodiment of the present invention, please refer to the appendix to the specification. Figures 9-11This embodiment discloses a rotor coil end forming device, including an insulating barrel, a conical barrel 2, and an annular barrel 1. The insulating barrel includes multiple insulating blocks 6 with inclined bottom surfaces. The insulating blocks 6 are clamped together by elastic members to form the insulating barrel. The insulating barrel is disposed outside the conical barrel 2. The insulating barrel is in contact with the inclined surface of the conical barrel 2. The inside of the conical barrel 2 is in contact with the annular barrel 1. A support block is provided on the insulating barrel. The annular barrel 1 is an annular steel barrel. A spring plate 10 is provided on one side of the insulating block 6. The spring plate 10 is connected to the end face of the annular barrel 1 by bolts 11. An opening is provided at the end of the annular barrel 1. A bolt 12 and a movable pressure block 13 are provided at the opening at the end of the annular barrel 1.

[0057] This embodiment consists of an insulating bucket, a conical aluminum bucket, and an annular steel bucket from the outside in. The steel bucket ensures the integrity and strength of the tool. Each component is then assembled on the basis of the steel bucket, achieving easy assembly and disassembly. This embodiment is easy to manage, has high overall performance, and is convenient for installation and disassembly. The annular bucket 1 has a bolt 12 and a movable pressure block 13 at the opening at its end. The movable pressure block 13 and the bolt 12 that cooperate with it can be used to push the conical bucket 2, thereby reducing the outer diameter of the insulating block 6 and allowing the entire device to be removed. This design further reduces the difficulty of disassembly, while preventing the conical bucket 2 from being damaged by force, increasing the service life of the device, improving the assembly quality of the rotor coil, and thus improving the safety and reliability of rotor operation. It also has a high reusability rate.

[0058] Example 5

[0059] In another preferred embodiment of the present invention, the present invention includes a rotor coil end forming device, comprising an insulating barrel, a conical barrel 2, and an annular barrel 1. The insulating barrel includes a plurality of insulating blocks 6 with inclined bottom surfaces. The insulating blocks 6 are clamped together by elastic members to form the insulating barrel. The insulating barrel is disposed outside the conical barrel 2. The insulating barrel is in contact with the inclined surface of the conical barrel 2. The inside of the conical barrel 2 is in contact with the annular barrel 1. The insulating barrel is provided with a coil straight support block 9 and a coil end support block 7. The insulating block 6 is provided with a lifting screw 5. The end face of the annular barrel 1 is provided with a lifting eye screw 8. A positioning screw 3 is provided between the insulating block 6 and the conical barrel 2. The insulating block 6 is provided with a groove, and an elastic member is disposed in the groove. The elastic member is a full-circle spring 4. A spring plate 10 is provided on one side of the insulating block 6. The spring plate 10 is connected to the end face of the annular barrel 1 by bolts 11. The end of the annular barrel 1 is provided with an opening. A bolt 12 and a movable pressure block 13 are provided at the opening at the end of the annular barrel 1.

[0060] This embodiment features a groove on the insulating block 6, with an elastic element (spring 4) positioned within it. This design ensures the elastic element does not affect the overall shape of the device, improving its accuracy. Simultaneously, it secures the elastic element, preventing it from shifting. During disassembly, a thin insulating rod can be inserted through the opening on the annular barrel 1, passing through its end face and contacting the conical barrel 2. Tapping the rod loosens the conical barrel 2. Then, bolts 12 and movable pressure blocks 13 at the opening on the end face of the annular barrel 1 push the conical barrel 2 against the shaft body, causing the outer diameter of the insulating block 6 to shrink, allowing the entire device to be removed. This embodiment is aesthetically pleasing, easy to manage, possesses high overall performance, is convenient to install and disassemble, and features a clever design. It improves the assembly quality of the rotor coil, thereby enhancing the safety and reliability of rotor operation, and has a high reusability rate.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A rotor coil end forming device, characterized in that, It includes an insulating barrel, a conical barrel (2) and an annular barrel (1). The insulating barrel includes multiple insulating blocks (6) with inclined bottom surfaces. The insulating blocks (6) are clamped together by elastic members to form an insulating barrel. The insulating barrel is set outside the conical barrel (2). The insulating barrel is in contact with the inclined surface of the conical barrel (2). The inside of the conical barrel (2) is in contact with the annular barrel (1). The end face of the annular barrel (1) is provided with an opening. The insulating barrel is provided with a support block.

2. The rotor coil end forming device according to claim 1, characterized in that, The insulating barrel is equipped with lifting screws (5).

3. The rotor coil end forming device according to claim 2, characterized in that, The lifting screw (5) passes through the insulating barrel, the conical barrel (2) and the annular barrel (1), and the conical barrel (2) has an opening.

4. The rotor coil end forming device according to claim 1, characterized in that, The conical barrel (2) is a conical aluminum barrel.

5. The rotor coil end forming device according to claim 1, characterized in that, The annular barrel (1) is an annular steel barrel.

6. The rotor coil end forming device according to claim 1, characterized in that, The end face of the annular barrel (1) is provided with a lifting eye screw (8).

7. The rotor coil end forming device according to claim 1, characterized in that, A positioning screw (3) is provided between the insulating block (6) and the conical barrel (2).

8. The rotor coil end forming device according to claim 1, characterized in that, The insulating block (6) has a groove, and an elastic element is disposed in the groove. The elastic element is a spring (4).

9. A rotor coil end forming apparatus according to any one of claims 1-8, characterized in that, The insulating block (6) has a spring plate (10) on one side. The spring plate (10) is connected to the end face of the annular barrel (1) by bolts (11). The end of the annular barrel (1) has an opening.

10. A rotor coil end forming apparatus according to claim 9, characterized in that, The annular barrel (1) has a bolt (12) and a movable pressure block (13) at the end opening.

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