Improved flexible connecting piece structure
The flexible connecting plate structure solves the problem that traditional rigid connection structures cannot adapt to positional deviations and thermal expansion differences, thus achieving safe, reliable, and convenient maintenance of large generators for flexible operation.
Patent Information
- Application Number
- CN202422730253.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-11-11
AI Technical Summary
The rigid connection structure at the end of the stator winding of traditional large generators cannot adapt to positional deviations and thermal expansion differences, resulting in excessive stress and failing to meet the requirements for flexible operation.
The flexible connecting plate structure consists of upper and lower stator bar water box covers, flexible connecting plates, pressure plates, fixed pressure plates, bolts, disc washers, and locking plates. The flexible connecting plate has an "Ω" shaped bend in the middle, which can be stretched and adjusted to adapt to position deviations and relative position changes caused by temperature rise.
It enables adaptive adjustment to relative position changes caused by positional deviation and temperature rise, reduces internal stress, improves the safety, reliability, and flexibility of the connection, and facilitates disassembly and replacement.
Smart Images
Figure CN223583236U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of large generator, especially a improved flexible connecting piece structure. BACKGROUND
[0002] At present, the copper strand hard connection structure is used for the electrical connection of the upper and lower layer wire bars of the stator winding end of the traditional large generator in China, the hard connection structure has poor conformability to the position deviation of the stator wire bar lead-out line, and needs to be adapted one by one; especially when the generator is flexibly operated, the hard connection structure cannot completely adapt to the thermal expansion difference caused by the different temperature rises of the upper and lower layer stator wire bars, and the hard connection will bear additional stress. In the face of the current demand for large-scale flexible operation of thermal power, there is an urgent need for a connection structure that can adapt to position deviation and can bear thermal expansion difference, and the improved flexible connecting piece structure for large generators can meet the above demand. SUMMARY
[0003] The utility model discloses an improved flexible connecting piece structure for improving the flexible operation of a generator. The technical scheme of the utility model is: the improved flexible connecting piece structure is composed of an upper layer stator wire bar water box cover, a lower layer stator wire bar water box cover, a flexible connecting piece, a pressing plate, a fixed pressing plate, a bolt, a disc washer and a lock piece; the flexible connecting piece is placed on both sides of the upper layer stator wire bar water box cover and the lower layer stator wire bar water box cover, the pressing plate and the fixed pressing plate clamp the flexible connecting piece in cooperation with the upper layer stator wire bar water box cover and the lower layer stator wire bar water box cover, and the bolt is fastened, the disc washer and the lock piece are used in cooperation with the bolt to prevent the bolt from loosening. The flexible connecting piece has an "Ω" type bend in the middle, which can realize the stretching and contraction of itself along the length direction; the pressing plate is provided with a light hole for placing the bolt; and the fixed pressing plate is provided with a threaded hole for fixing the bolt.
[0004] Compared with the prior art, the utility model has the beneficial effects that:
[0005] 1. When the water box cover electrical connection surface of the upper layer wire bar and the lower layer wire bar of the stator appears a certain position deviation along the axial direction, the circumferential direction and the radial direction of the generator, the flexible connecting piece structure in the utility model can adjust and adapt through the "Ω" type bend stretching and contraction of the connecting piece itself.
[0006] 2. When the generator is flexibly operated, the relative position of the upper layer wire bar and the lower layer wire bar of the stator changes due to the influence of the temperature rise thermal expansion, the flexible connecting piece can adjust and adapt through the "Ω" type bend stretching and contraction of the connecting piece itself, and the internal stress of the flexible connecting piece is small, which avoids the problem that the original hard connection structure cannot be elongated and shortened and the internal stress is too large.
[0007] 3. The improved flexible connecting piece structure in the utility model, through the pressing plate and the fixed pressing plate, the flexible connecting piece is clamped with the stator bar water box cover, and the bolt fastening is used, the safety and reliability of the connection are guaranteed, welding connection mode is avoided, convenient disassembly and replacement can be realized. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 It is side view detail map of the improved flexible connecting piece structure;
[0009] Figure 2 It is front view detail map of the improved flexible connecting piece structure.
[0010] Component number explanation in the drawing:
[0011] 1. The upper layer stator bar water box cover;2. The lower layer stator bar water box cover;3. Flexible connecting piece;4. Pressing plate;5. Fixed pressing plate;6. Bolt;7. Disc washer;8. Locking piece. DETAILED DESCRIPTION
[0012] The technical scheme of the present application will be further described in detail in connection with specific implementation manners. To make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different structures.
[0013] By Figure 1 Figure 2 It can be known that an improved flexible connecting piece structure includes upper layer stator bar water box cover 1, lower layer stator bar water box cover 2, flexible connecting piece 3, pressing plate 4, fixed pressing plate 5, bolt 6, disc washer 7 and locking piece 8. The flexible connecting piece 3 is placed in the upper layer stator bar water box cover 1 and the lower layer stator bar water box cover 2. The pressing plate 4 and the fixed pressing plate 5 clamp the flexible connecting piece 3 in cooperation with the upper layer stator bar water box cover 1 and the lower layer stator bar water box cover 2, and are fastened with the bolt 6. The disc washer 7 and the locking piece 8 are used in cooperation with the bolt 6 to prevent the bolt 6 from loosening.
[0014] By Figure 1 It can be known that the flexible connecting piece 3 has an "Ω" type bending in the middle, which can realize the stretching and contraction along the length direction. The pressing plate 4 is provided with a light hole for placing the bolt 6. The fixed pressing plate 5 is provided with a threaded hole for fixing the bolt 6.
[0015] The utility model improves the conformation ability of the upper and lower layer wire rod electrical connection structure of the large-scale thermal power generator stator winding end part. When the unit flexibility operation, frequent depth peak shaving makes the upper and lower layer wire rod temperature rise different, and the relative position change between the lead wires is caused by the thermal expansion difference value, the improved flexible connecting piece structure can stretch and shrink along with the relative position change, the fatigue fracture caused by the excessive internal stress of the electrical connection structure is avoided, and the safety and reliability of the generator flexibility operation are improved.
[0016] The above has described the basic principles and main features of the utility model in combination with the drawings. The skilled in the art should understand that the above examples do not limit the utility model in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the utility model.
Claims
1. An improved flexible tab structure, characterized by, The utility model relates to a stator bar water box cover, which is composed of an upper layer stator bar water box cover (1), a lower layer stator bar water box cover (2), a flexible connecting piece (3), a pressing plate (4), a fixed pressing plate (5), a bolt (6), a disc washer (7) and a lock piece (8).
2. The improved flexible tab structure according to claim 1, wherein The flexible connecting piece (3) is connected to the upper layer stator bar water box cover (1) and the lower layer stator bar water box cover (2), the pressing plate (4) and the fixed pressing plate (5) are used in cooperation with the upper layer stator bar water box cover (1) and the lower layer stator bar water box cover (2) to clamp the flexible connecting piece (3), and the bolt (6) is fastened, the disc washer (7) and the lock piece (8) are used in cooperation with the bolt (6) to prevent the bolt (6) from loosening. The flexible connecting piece (3) is provided with an "Ω" type bend in the middle; the pressing plate (4) is provided with a light hole for placing the bolt (6); and the fixed pressing plate (5) is provided with a threaded hole for fixing the bolt (6).