A cross type generator stator core sheet slot wedge rod

Abstract

The utility model discloses a cross type generator stator core piece whole slot wedge stick belongs to the water power station electromechanical installation technical field. Aiming at the problem that traditional metal tool is easy to damage the punching piece insulating coating, produces iron filings pollution, low efficiency and great labor intensity, the slot wedge stick adopts high density hard insulating board integral processing, realizes punching piece accurate positioning through the non - metallic short stick structure of cross section, and the first rectangular prism of its back side is closely attached with the tooth part side wall, and the left and right triangular prism forms the self - centering clamping structure, and the exposed end of the front side second rectangular prism integrates the rope traction connecting hole and the gradient circular surface, and the stress distribution is optimized and the operation difficulty is reduced. The slot wedge stick can ensure that the coating is complete, the tool service life is long, guarantees the verticality of the stacking, shortens the single whole time, and the lightweight design can cooperate with the traction device, significantly improves the construction efficiency and safety, realizes the stator core stacking high accuracy, low loss, labor - saving operation, and has remarkable engineering application value.

Description

Technical Field

[0001] This utility model relates to the field of electromechanical installation technology of hydropower stations, and in particular to a cross-shaped generator stator core lamination shaping slot wedge bar. Background Technology

[0002] In the core components of hydropower station generator units, the stator core is made of hundreds of thousands of silicon steel laminations, each 0.5mm thick, stacked together. Its installation accuracy directly affects the unit's operating efficiency and safety. In traditional processes, stator laminations are positioned between layers using trapezoidal grooves and protrusions on both sides of the teeth, requiring specialized tools for shaping and calibration. However, existing technologies have the following key problems:

[0003] 1. Material damage risk: Existing positioning tools are mostly made of metal, and their rigid contact surfaces are prone to scratching the anti-corrosion and insulating coating on the surface of the laminations during operation. Experimental data shows that traditional tools cause coating damage rates as high as 12%-18%, and local insulation failure may cause abnormal eddy currents in the core, resulting in a local temperature increase of 5-8°C during unit operation, posing a risk of short circuit and burnout.

[0004] 2. Process contamination defects: Iron filings generated by metal tool wear average 50-80g per operation, which are difficult to completely remove. Residues may cause short circuits between core layers, increasing no-load losses by about 3%-5%. A case study of a large hydropower station showed that iron filings residue caused the stator iron loss test failure rate to rise to 7.3%, requiring rework.

[0005] 3. Efficiency and Precision Bottlenecks: Manual operation relies on experience-based judgment, and the verticality error of lamination stacking often exceeds 0.2mm / m, resulting in excessive deviation in the overall core coaxiality. Statistics show that the shaping process in traditional processes accounts for 40%-50% of the total stacking time and requires repeated adjustments, significantly affecting the construction progress.

[0006] 4. Labor Intensity Issues: Metal tools are heavy, with a single piece weighing over 2kg. Combined with the hammering and prying operations, workers experience high labor intensity and are prone to muscle strain. Occupational health monitoring shows that the incidence of lumbar spine diseases among workers in related positions is 2.3 times higher than that of workers in other occupations. Utility Model Content

[0007] To solve the above problems, this utility model provides a cross-shaped generator stator core lamination shaping slot wedge bar, which is suitable for the shaping and installation of stator laminations in hydropower stations and can complete the lamination shaping and positioning conveniently and efficiently.

[0008] The technical solution adopted in this utility model is as follows:

[0009] A cross-shaped generator stator core lamination shaping slot wedge bar is a non-metallic short bar with a cross-shaped cross section. One side of its cross section can be wedged into the stator teeth and engaged with two adjacent tooth laminations. The other side of its cross section is exposed outside the stator teeth and can be held by hand or connected to a rope.

[0010] Furthermore, a first rectangular prism structure protruding outward is formed on the rear side of the cross-shaped generator stator core lamination shaping slot wedge. After the cross-shaped generator stator core lamination shaping slot wedge is wedged into the stator teeth, the first rectangular prism structure fits tightly against the sidewalls of two adjacent tooth laminations.

[0011] Furthermore, the left and right sides of the cross-shaped generator stator core lamination shaping slot wedge have outwardly protruding triangular prism structures. After the cross-shaped generator stator core lamination shaping slot wedge is wedged into the stator teeth, the triangular prism structures are engaged with the side walls of the two adjacent tooth laminations.

[0012] Furthermore, a second rectangular prism structure protruding outward is formed on the front side of the cross-shaped generator stator core lamination shaping slot wedge. The second rectangular prism structure can be exposed outside the stator teeth after the cross-shaped generator stator core lamination shaping slot wedge is wedged into the stator teeth.

[0013] Furthermore, the second rectangular prism structure has connection holes at both the top and bottom ends that can be connected to ropes.

[0014] Furthermore, the upper and lower ends of the second rectangular prism structure have sloping arc surfaces.

[0015] The beneficial effects of this utility model are:

[0016] 1. The cross-shaped generator stator core lamination shaping slot wedges are made of hard high-density insulating board, which has the characteristics of high hardness and high strength, good wear resistance, good electrical insulation performance and machinability. It can avoid the generation of wear conductive debris during the stator lamination shaping process, which would endanger the operation of the stator.

[0017] 2. The cross-shaped generator stator core lamination shaping slot wedge bar is tightly fitted to the sidewalls of two adjacent toothed laminations through the rear first rectangular prism structure, optimizing the pressure distribution on the contact surface; through the left and right triangular prism structures, a self-aligning snap-fit ​​structure is formed, which engages with the grooves on the sidewalls of the toothed laminations to prevent warping and deformation of the laminations; the front second rectangular prism structure is exposed, facilitating handheld operation and reducing the difficulty of worker operation. The upper and lower ends of the second rectangular prism structure are provided with connection holes that can be connected to ropes, and can be used with a traction device to fix and pull with ropes, shortening the shaping time per cycle.

[0018] 3. The cross-shaped generator stator core lamination shaping slot wedge can wedge into the stator teeth and engage with two adjacent tooth laminations, effectively preventing damage to the stator lamination insulation due to sharp edges during the shaping and installation process. The cross-shaped generator stator core lamination shaping slot wedge can effectively and quickly complete the positioning and shaping of the stator laminations, greatly improving work efficiency and installation quality. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of the shaping slot wedge bar for the stator core lamination of a cross-shaped generator;

[0020] Figure 2 Elevation view showing the installation position of the wedge bar in the shaping slot of the stator core lamination of a cross-shaped generator;

[0021] Figure 3 Plan view showing the installation position of the wedge bars in the shaping slots of the stator core laminations of a cross-shaped generator;

[0022] In the figure: 1. Cross-shaped generator stator core lamination shaping slot wedge bar; 2. Toothed lamination; 3. First rectangular prism structure; 4. Triangular prism structure; 5. Second rectangular prism structure; 6. Connecting hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] To address the problems of traditional metal tools easily damaging the insulating coating of stamping laminations, generating iron filings pollution, low efficiency, and high labor intensity, this embodiment provides a cross-shaped generator stator core lamination shaping slot wedge bar.

[0025] Specifically, such as Figure 1 As shown, the cross-shaped generator stator core lamination shaping slot wedge 1 is a non-metallic short rod with a cross-shaped cross section. It is made entirely of hard, high-density insulating board, possessing high hardness and strength, good wear resistance and electrical insulation properties, and is easy to machine, thus avoiding conductive debris generated during the lamination shaping process. For example... Figure 1As shown, the rear side of the cross-shaped generator stator core lamination shaping slot wedge bar 1 has an outwardly protruding first rectangular prism structure 3, the left and right sides have outwardly protruding triangular prism structures 4, and the front side has an outwardly protruding second rectangular prism structure 5. The edges of each prism structure are rounded and chamfered. In particular, the upper and lower ends of the second rectangular prism structure 5 are also rounded during processing to form a sloping arc surface.

[0026] The usage process of the cross-shaped generator stator core lamination shaping slot wedge 1 is as follows:

[0027] Before stacking the stator tooth laminations 2, the preceding work must be inspected and accepted. Then, several cross-shaped generator stator core lamination shaping slot wedges 1 are fixed to the stator teeth; such as... Figure 1 and Figure 3 As shown, one side of the cross-shaped generator stator core lamination shaping slot wedge 1 can be wedged into the stator teeth and engaged with two adjacent tooth laminations 2, while the other side of its cross-section is outside the stator teeth, so as to facilitate hand-holding or connection with ropes.

[0028] After the cross-shaped generator stator core lamination shaping groove wedge 1 is wedged into the stator teeth, the first rectangular prism structure 3 fits tightly against the sidewalls of the two adjacent tooth laminations 2; at the same time, the triangular prism structures 4 on the left and right sides engage with the grooves on the sidewalls of the two adjacent tooth laminations 2; the second rectangular edge structure protrudes outside the stator teeth for easy handling or connection with ropes.

[0029] In this embodiment, the upper and lower ends of the second rectangular prism structure 5 are provided with connection holes 6 that can be connected to ropes, so that the cross-shaped generator stator core lamination shaping slot wedge 1 can be connected to the traction equipment via ropes. During the stacking of gear laminations, after stacking to a certain height, the cross-shaped generator stator core lamination shaping slot wedge 1 is pulled by the traction equipment and ropes. The irregular cross section of the cross-shaped generator stator core lamination shaping slot wedge 1 is wedged into the stator teeth, that is, the first rectangular prism structure 3 and the left and right triangular prism structures 4 are fully fitted with the tooth laminations 2, thereby completing the positioning, shaping and verticality adjustment. This operation is repeated in stages for stacking and pressing until the stator core installation is completed and accepted.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A slot wedge bar for shaping slots of a cross generator stator core sheet, characterized by: The cross-shaped generator stator core lamination shaping slot wedge is a non-metallic short rod with a cross-shaped cross section. One side of its cross section can wedge into the stator teeth and engage with two adjacent tooth laminations, while the other side of its cross section is exposed outside the stator teeth and can be held by hand or connected to a rope.

2. A slot wedge bar for a cross generator stator core segment according to claim 1, characterized in that: The rear side of the cross-shaped generator stator core lamination shaping slot wedge has an outwardly protruding first rectangular prism structure. After the cross-shaped generator stator core lamination shaping slot wedge is wedged into the stator teeth, the first rectangular prism structure fits tightly against the sidewalls of the two adjacent tooth laminations.

3. The slot wedge bar for a cross generator stator core segment of claim 1, wherein: The left and right sides of the cross-shaped generator stator core lamination forming slot wedge have outwardly protruding triangular prism structures. After the cross-shaped generator stator core lamination forming slot wedge is wedged into the stator teeth, the triangular prism structures are engaged with the side walls of the two adjacent tooth laminations.

4. The slot wedge bar for a cross generator stator core segment of claim 1, wherein: The front side of the cross-shaped generator stator core lamination shaping slot wedge has an outwardly protruding second rectangular prism structure. The second rectangular prism structure can be exposed outside the stator teeth after the cross-shaped generator stator core lamination shaping slot wedge is wedged into the stator teeth.

5. A slot wedge bar for a cross generator stator core segment according to claim 4, characterised in that: The second rectangular prism structure has connection holes at both the top and bottom ends that can be connected to ropes.

6. The slot wedge bar for a cross generator stator core segment of claim 4, wherein: The upper and lower ends of the second rectangular prism structure form sloping arc surfaces.

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