Generator slot wedge

Abstract

The utility model discloses a generator slot wedge, and particularly relates to the technical field of generator slot wedges, which comprises a stator slot wedge arranged in a generator mounting slot, a wedge is arranged at the bottom end of the stator slot wedge, an elastic corrugated plate is arranged at the bottom end of the wedge, and two coils which are sequentially distributed up and down are arranged at the bottom end of the elastic corrugated plate. The coil, the elastic corrugated plate and the wedge are all arranged in the generator mounting groove, and a cavity is formed in the stator slot wedge. The wedge and the elastic corrugated plate are arranged at the bottom end of the stator slot wedge to form an upper and lower slot wedge structure, according to the thickness of the actually-matched wedge, the compression amount of the elastic corrugated plate can be effectively adjusted, the pressing force in the stator slot is ensured, the stator slot wedge is prevented from loosening, and the rotating handle can be rotated to drive the worm and the rotating rod to rotate, so that the stator slot wedge is prevented from loosening. The worm drives the plurality of threaded rods to rotate simultaneously through the worm gear, and the nut blocks on the threaded rods move and are inserted into the slots, so that the firmness between the stator slot wedge and the generator mounting slot can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of generator slot wedges, in particular to a generator slot wedge. Background Art

[0002] The generator slot wedge is a component installed in the slot of the generator stator core, usually made of wood or other insulating materials. Its function is to conduct the heat of the stator winding to the stator core and take away the heat through the coolant (usually water or air) to maintain the normal operating temperature of the generator. The slot wedge also helps to fix the position of the stator winding in the slot to prevent the winding from shifting due to centrifugal force during the operation of the generator. This can ensure the electrical performance and mechanical stability of the generator. In the design and manufacturing process of the generator, the shape, size and material selection of the slot wedge are very important, which directly affects the heat dissipation effect, operating efficiency and reliability of the generator.

[0003] For example, the prior art publication number is CN220553870U, which is a hydro-turbine generator stator slot wedge mechanism. The utility model can adjust the compression amount of the hydro-turbine generator stator slot wedge, and ensure that the slot wedge will not loosen or move even if the unit is affected by factors such as thermal expansion and vibration after long-term operation.

[0004] However, the above-mentioned prior art still has the following problems when in use: the existing generator slot wedges have a lot of looseness in the stator end slot wedges under long-term variable load peak regulation operation or long-term high load operation. Based on this, the utility model provides a generator slot wedge that is firmly installed. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a generator slot wedge, which is composed of an upper and lower slot wedge structure by combining an inclined wedge and an elastic corrugated plate. According to the thickness of the actual inclined wedge, the compression amount of the elastic corrugated plate can be effectively adjusted to ensure the clamping force in the stator slot and avoid the stator slot wedge from loosening. In addition, by means of a turning handle, a worm and a worm gear, nut blocks on multiple threaded rods are driven to be inserted into the slots, so as to further improve the firmness between the stator slot wedge and the generator mounting slot, so as to solve the problems in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a generator slot wedge, comprising a stator slot wedge arranged in a generator mounting groove, wherein an inclined wedge is arranged at the bottom end of the stator slot wedge, an elastic corrugated plate is arranged at the bottom end of the inclined wedge, two coils distributed in sequence up and down are arranged at the bottom end of the elastic corrugated plate, the coil, the elastic corrugated plate and the inclined wedge are all arranged in the generator mounting groove, a cavity is arranged inside the stator slot wedge, a plurality of worms are arranged in the cavity, a rotating rod is fixed between two adjacent worms, a worm wheel is meshed at the bottom end of each worm, threaded rods are fixed on both sides of the worm wheel, nut blocks are threadedly connected to the threaded rods, slots adapted to the nut blocks are opened on the inner walls on both sides of the generator mounting groove, and a plurality of nut blocks are respectively arranged in the plurality of slots to improve the connection firmness between the stator slot wedge and the generator mounting groove.

[0007] In a preferred embodiment, multiple receiving grooves are formed on the outer walls on both sides of the stator slot wedge, multiple threaded rods penetrate the stator slot wedge and extend into the multiple receiving grooves respectively, and multiple nut blocks are respectively arranged in the multiple receiving grooves for receiving the nut blocks to prevent the nut blocks from obstructing the installation of the stator slot wedge.

[0008] In a preferred embodiment, a circular groove is provided at the front end of the stator slot wedge, a turning handle is provided in the circular groove, a connecting rod is fixedly provided at the rear end of the turning handle, the rear end of the connecting rod passes through the stator slot wedge and is fixed to the front end of the worm, so that the staff can turn the turning handle to drive the worm to rotate, thereby adjusting the positions of multiple nut blocks.

[0009] In a preferred embodiment, a bolt is threadedly connected to the throttle, and the throttle is fixed to the stator slot wedge by the bolt, so as to improve the stability of the throttle.

[0010] In a preferred embodiment, a rubber sealing plug is provided in the circular groove, a embedding groove is provided at the rear end of the rubber sealing plug, and the handlebar and the bolt are both provided in the embedding groove to prevent the handlebar and the bolt from being exposed.

[0011] In a preferred embodiment, the outer wall surface of the rubber sealing plug is fixed with a plurality of protrusions, and the inner wall surface of the circular groove is provided with a plurality of grooves adapted to the plurality of protrusions. The plurality of protrusions are respectively arranged in the plurality of grooves to improve the firmness between the rubber sealing plug and the embedding groove.

[0012] In a preferred embodiment, a plurality of blocks are distributed in a ring array on the outer wall surface of the rubber sealing plug, further improving the firmness between the rubber sealing plug and the circular groove.

[0013] Technical effects and advantages of the utility model:

[0014] The utility model arranges an inclined wedge and an elastic corrugated plate at the bottom end of the stator slot wedge to form an upper and lower slot wedge structure. According to the thickness of the actually equipped inclined wedge, the compression amount of the elastic corrugated plate can be effectively adjusted to ensure the pressing force in the stator slot and avoid the stator slot wedge from loosening. In addition, the turning handle can be turned to drive the worm and the turning rod to rotate. The worm drives multiple threaded rods to rotate simultaneously through the worm gear, and the nut blocks on the threaded rods are moved and inserted into the slots, so that the firmness between the stator slot wedge and the generator installation slot can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the generator installation slot of the utility model;

[0017] Figure 3 The utility model is a diagram of the stator slot wedge, the inclined wedge and the elastic corrugated plate;

[0018] Figure 4 It is a cross-sectional view of a stator slot wedge of the utility model;

[0019] Figure 5 For this utility model Figure 4 Enlarged view of part A in the middle;

[0020] Figure 6 It is a rear view of the rubber sealing plug of the utility model.

[0021] The accompanying drawings are marked as follows: 1. generator mounting slot; 2. stator slot wedge; 3. oblique wedge; 4. elastic corrugated plate; 5. coil; 6. cavity; 7. worm; 8. rotating rod; 9. worm wheel; 10. threaded rod; 11. nut block; 12. slot; 13. storage slot; 14. circular slot; 15. turning handle; 16. connecting rod; 17. bolt; 18. rubber sealing plug; 19. embedded groove; 20. protrusion; 21. slot. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Refer to the instruction manual Figure 1-6The utility model provides a generator slot wedge, comprising a stator slot wedge 2 arranged in a generator mounting slot 1, wherein an inclined wedge 3 is arranged at the bottom end of the stator slot wedge 2, an elastic corrugated plate 4 is arranged at the bottom end of the inclined wedge 3, two coils 5 distributed in sequence up and down are arranged at the bottom end of the elastic corrugated plate 4, the coil 5, the elastic corrugated plate 4 and the inclined wedge 3 are all arranged in the generator mounting slot 1, a cavity 6 is arranged inside the stator slot wedge 2, a plurality of worms 7 are arranged in the cavity 6, a rotating rod 8 is fixedly arranged between two adjacent worms 7, a worm wheel 9 is meshed at the bottom end of each worm 7, and threaded rods 10 are fixedly arranged on both sides of the worm wheel 9;

[0024] The threaded rod 10 is threadedly connected with a nut block 11, and the inner walls on both sides of the generator installation slot 1 are provided with slots 12 adapted to the nut blocks 11, and multiple nut blocks 11 are respectively arranged in multiple slots 12, so as to improve the connection firmness between the stator slot wedge 2 and the generator installation slot 1;

[0025] In addition, multiple receiving grooves 13 are provided on the outer walls on both sides of the stator slot wedge 2, and multiple threaded rods 10 penetrate the stator slot wedge 2 and extend into the multiple receiving grooves 13 respectively. Multiple nut blocks 11 are respectively arranged in the multiple receiving grooves 13 for accommodating the nut blocks 11 to prevent the nut blocks 11 from obstructing the installation of the stator slot wedge 2. A circular groove 14 is provided at the front end of the stator slot wedge 2, and a turning handle 15 is provided in the circular groove 14. A connecting rod 16 is fixedly provided at the rear end of the turning handle 15. The rear end of the connecting rod 16 penetrates the stator slot wedge 2 and is fixed to the front end of the worm 7, so that the staff can turn the turning handle 15 to drive the worm 7 to rotate, thereby adjusting the positions of the multiple nut blocks 11.

[0026] When in use, an inclined wedge 3 and an elastic corrugated plate 4 are arranged at the bottom end of the stator slot wedge 2. The inclined wedge 3 and the elastic corrugated plate 4 are combined into an upper and lower slot wedge structure. In actual use, the staff can effectively adjust the compression amount of the elastic corrugated plate 4 according to the thickness of the actual inclined wedge 3 to ensure the clamping force in the stator slot and avoid the stator slot wedge 2 from loosening. The inclined wedge 3 is in contact with the dove tail of the generator core tooth part. The inclined wedge 3 does not move, and the elastic corrugated plate 4 is not easy to cause damage to the dove tail of the generator core tooth part.

[0027] In addition, the staff can also turn the handle 15 to drive the multiple worm gears 7 and the multiple rotating rods 8 to rotate together. When the multiple worm gears 7 are respectively engaged with the multiple worm wheels 9, the multiple threaded rods 10 are driven to rotate simultaneously, and the nut blocks 11 on the threaded rods 10 are moved and inserted into the slots 12, so as to further improve the firmness between the stator slot wedge 2 and the generator mounting slot 1.

[0028] Refer to the instruction manual Figure 1-6A bolt 17 is threadedly connected to the throttle 15, and the throttle 15 is fixed to the stator slot wedge 2 by the bolt 17, so as to improve the stability of the throttle 15. A rubber sealing plug 18 is provided in the circular groove 14, and a recessed groove 19 is provided at the rear end of the rubber sealing plug 18. The throttle 15 and the bolt 17 are both arranged in the recessed groove 19 to prevent the throttle 15 and the bolt 17 from being exposed.

[0029] The outer wall surface of the rubber sealing plug 18 is fixed with a plurality of protrusions 20, and the inner wall surface of the circular groove 14 is provided with a plurality of card grooves 21 adapted to the plurality of protrusions 20. The plurality of protrusions 20 are respectively arranged in the plurality of card grooves 21 to improve the firmness between the rubber sealing plug 18 and the embedding groove 19. The plurality of card blocks are distributed in a ring array on the outer wall surface of the rubber sealing plug 18 to further improve the firmness between the rubber sealing plug 18 and the circular groove 14.

[0030] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A generator slot wedge, characterized in that: The invention comprises a stator slot wedge (2) arranged in a generator installation slot (1), wherein the bottom end of the stator slot wedge (2) is provided with an inclined wedge (3), the bottom end of the inclined wedge (3) is provided with an elastic corrugated plate (4), the bottom end of the elastic corrugated plate (4) is provided with two coils (5) distributed in sequence up and down, and the coils (5), the elastic corrugated plate (4) and the inclined wedge (3) are all arranged in the generator installation slot (1); A cavity (6) is provided inside the stator slot wedge (2), a plurality of worms (7) are provided in the cavity (6), a rotating rod (8) is fixedly provided between two adjacent worms (7), a worm wheel (9) is meshed at the bottom end of each worm (7), threaded rods (10) are fixedly provided on both sides of the worm wheel (9), a nut block (11) is threadedly connected to the threaded rod (10), slots (12) adapted to the nut block (11) are provided on the inner walls on both sides of the generator mounting groove (1), and the plurality of nut blocks (11) are respectively provided in the plurality of slots (12) to improve the connection firmness between the stator slot wedge (2) and the generator mounting groove (1).

2. A generator slot wedge according to claim 1, characterized in that: The outer walls on both sides of the stator slot wedge (2) are provided with a plurality of receiving grooves (13), a plurality of threaded rods (10) penetrate the stator slot wedge (2) and extend into the plurality of receiving grooves (13) respectively, and a plurality of nut blocks (11) are respectively arranged in the plurality of receiving grooves (13).

3. A generator slot wedge according to claim 1, characterized in that: A circular groove (14) is formed at the front end of the stator slot wedge (2), a turning handle (15) is provided in the circular groove (14), a connecting rod (16) is fixedly provided at the rear end of the turning handle (15), the rear end of the connecting rod (16) passes through the stator slot wedge (2) and is fixed to the front end of the worm (7) for driving the worm (7) to rotate.

4. A generator slot wedge according to claim 3, characterized in that: The throttle handle (15) is threadedly connected with a bolt (17), and the throttle handle (15) is fixed to the stator slot wedge (2) via the bolt (17), so as to improve the stability of the throttle handle (15).

5. A generator slot wedge according to claim 4, characterized in that: A rubber sealing plug (18) is arranged in the circular groove (14), a rear end of the rubber sealing plug (18) is provided with an embedding groove (19), and the turning handle (15) and the bolt (17) are both arranged in the embedding groove (19).

6. A generator slot wedge according to claim 5, characterized in that: The outer wall surface of the rubber sealing plug (18) is fixedly provided with a plurality of protrusions (20), the inner wall surface of the circular groove (14) is provided with a plurality of slots (21) adapted to the plurality of protrusions (20), and the plurality of protrusions (20) are respectively arranged in the plurality of slots (21) to improve the firmness between the rubber sealing plug (18) and the embedding groove (19).

7. A generator slot wedge according to claim 5, characterized in that: A plurality of blocks are distributed in a ring array on the outer wall surface of the rubber sealing plug (18).

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