Axial pre-tightening mechanism of transformer

Abstract

The utility model discloses a transformer axial pre-tightening mechanism, and particularly relates to the technical field of transformers, the transformer axial pre-tightening mechanism comprises a transformer main body, the bottom of the transformer main body is fixedly connected with two fixed cross rods, and the interior of the transformer main body is fixedly connected with a pressing mechanism; the downward pressing mechanism comprises a protective shell, a motor is fixedly connected to the outer side of the protective shell, a first gear is coaxially connected to the output end of the motor, second gears are movably connected to the two sides of the first gear correspondingly, rotating rods are fixedly connected to the interiors of the two second gears correspondingly, and two threads are arranged in the two rotating rods correspondingly. And a plurality of limiting rings are fixedly connected to the outer sides of the two rotating rods. According to the pre-tightening mechanism, the downward pressing mechanism is arranged, the two threaded moving plates are driven by the two rotating rods and threads on the outer sides to generate downward pressure on the pressing plate, meanwhile, the two pressing rollers roll on the top of the pressing plate, the threaded moving plates are more stable in the process of pressing the pressing plate downwards, the stability of the pre-tightening mechanism is improved, and the working efficiency is improved. And meanwhile, the manual operation difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and more specifically, to an axial pre-tightening mechanism of a transformer. Background Art

[0002] In the design and manufacturing process of transformers, pre-tightening of windings is a key step, which directly affects the operation and life of the transformer. In order to enhance the reliability and tightness of connections, such as bolt connections and bearing connections, the method of pre-stressing to prevent gaps or relative slippage between connecting parts after being loaded is called pre-tightening.

[0003] When pre-tightening existing transformers, the bolts or cover plates on the upper ends of multiple winding assemblies are usually pre-tightened separately, one by one. This practice is likely to cause uneven local force and cause mechanical instability. In addition, due to the diversity of transformer types, the specifications of multiple winding assemblies inside the transformer are also different.

[0004] In order to solve the above problems, the axial pre-tightening mechanism disclosed in the utility model patent with publication number CN218414217U is provided with a pre-tightening plate, and the cross-section of the pre-tightening plate is arranged in a trapezoidal shape. When the pressure block moves toward the middle of the threaded rod, it will press the pre-tightening plate downward, so that the pre-tightening plate can play a pre-tightening role in the axial direction of the winding assembly. There is no need to pre-tighten multiple winding assemblies separately, and the internal structure of the entire transformer can be effectively protected.

[0005] However, when the above-mentioned pre-tightening device is actually used to pre-tighten the winding assembly inside the transformer, after multiple downward pressures between the pre-tightening mechanism and the winding assembly, the connection between the winding assembly and the pre-tightening mechanism may become loose, resulting in subsequent pre-tightening errors and causing the winding assembly to loosen again. Utility Model Content

[0006] In order to overcome the above defects of the prior art, the utility model provides a transformer axial pre-tightening mechanism to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A transformer axial pre-tightening mechanism comprises a transformer main body, two fixed cross bars are fixedly connected to the bottom of the transformer main body, and a pressing mechanism is fixedly connected inside the transformer main body;

[0009] The pressing mechanism includes a protective shell, a motor is fixedly connected to the outside of the protective shell, a first gear is coaxially connected to the output end of the motor, second gears are movably connected to both sides of the first gear, rotating rods are fixedly connected to the inside of two second gears, two threads are arranged inside the two rotating rods, a plurality of limit rings are fixedly connected to the outside of the two rotating rods, two threaded movable plates are movably connected to the outside of the plurality of threads, pressure rollers are movably connected to the bottom of the two threaded movable plates, and pressure plates are movably connected to the bottom of the two pressure rollers.

[0010] By adopting the above technical solution: two fixed cross bars are fixedly connected at the bottom of the transformer body, the protective shell is fixedly connected at the outside of the transformer body, the motor is fixedly connected at the outside of the protective shell, the first gear is coaxially connected at the output end of the motor, the two second gears are movably connected on both sides of the first gear, the two rotating rods are fixedly connected inside the two second gears, two threads are arranged inside the two rotating rods, multiple limit rings are fixedly connected at the outside of the two rotating rods, the two threaded movable plates are movably connected at the outside of the multiple threads, the pressure roller leaving the pressure roller is movably connected at the bottom of the two threaded movable plates, and the pressure plate is movably connected at the bottom of the two pressure rollers.

[0011] As a further description of the above technical solution:

[0012] A plurality of plugs are fixedly connected to the bottom of the pressure plate, two springs are movably connected inside the plurality of plugs, and one end of the plurality of springs is fixedly connected to a pop-up block.

[0013] By adopting the above technical solution: a plurality of plugs are fixedly connected at the bottom of the pressure plate, two springs are movably connected inside the plurality of plugs, and a plurality of pop-up blocks are fixedly connected at one end of the plurality of springs.

[0014] As a further description of the above technical solution:

[0015] Two slide grooves are arranged on the top of the pressing plate, and the two slide grooves are symmetrically distributed on the top of the pressing plate. A plurality of buffer pads are fixedly connected to the bottom of the pressing plate.

[0016] By adopting the above technical solution: two slide grooves are arranged on the top of the pressing plate, the two slide grooves are symmetrically distributed on the top of the pressing plate, and a plurality of buffer pads are fixedly connected at the bottom of the pressing plate.

[0017] As a further description of the above technical solution:

[0018] A winding assembly is fixedly connected inside the transformer body, and cover plates are fixedly connected at both upper and lower sides of the winding assembly.

[0019] By adopting the above technical solution: the winding assembly is fixedly connected inside the transformer body, and the cover plate is fixedly connected at the upper and lower sides of the winding assembly.

[0020] As a further description of the above technical solution:

[0021] A plurality of fixing rings are fixedly connected to the outer side of the upper cover plate, buttons are movably connected to both sides of the outer sides of the plurality of fixing rings, and two load-bearing pads are fixedly connected to the bottom of the lower cover plate.

[0022] By adopting the above technical solution: a plurality of fixing rings are fixedly connected on the outer side of the upper cover plate, buttons are movably connected on both sides of the outer sides of the plurality of fixing rings, and two load-bearing pads are fixedly connected on the bottom of the lower cover plate.

[0023] As a further description of the above technical solution:

[0024] The plurality of fixing rings are symmetrically distributed on the front and rear sides of the cover plate, and the plurality of buttons are symmetrically distributed inside the plurality of fixing rings.

[0025] By adopting the above technical solution: a plurality of fixing rings are symmetrically distributed on the front and rear sides of the cover plate, and a plurality of buttons are symmetrically distributed inside the fixing rings.

[0026] As a further description of the above technical solution:

[0027] Three support plates are fixedly connected to the bottom side of the inner wall of the transformer body, and buffer rubber pads are fixedly connected to the tops of the three support plates.

[0028] By adopting the above technical solution: three support plates are fixedly connected to the bottom side of the inner wall of the transformer body, and the buffer rubber pads are fixedly connected to the top of the three support plates.

[0029] Technical effects and advantages of the utility model:

[0030] 1. By setting a downward pressing mechanism, compared with the prior art, the two threaded movable plates, driven by the two rotating rods and the outer threads, exert downward pressure on the pressing plate, and at the same time, two pressing rollers roll on the top of the pressing plate, so that the threaded movable plates are more stable in the process of pressing the pressing plate downward, thereby improving the stability of the pre-tightening mechanism and reducing the difficulty of manual operation;

[0031] 2. By setting up the plug, spring, pop-up block, buffer pad, fixed ring, load-bearing pad and support plate, compared with the prior art, the two plugs are fixed by multiple springs and multiple fixed rings, so that the connection is more stable when the pressure plate presses the winding assembly downward, and at the same time, the winding assembly is buffered to a certain extent during the downward pressing process, so that the pre-tightening effect is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0033] Figure 2It is a schematic diagram of the cross-sectional structure of the utility model.

[0034] Figure 3 It is a schematic diagram of the front structure of the utility model.

[0035] Figure 4 It is a schematic diagram of the rotating rod structure of the utility model.

[0036] Figure 5 It is a schematic diagram of the cross-sectional structure of the pressing plate of the utility model.

[0037] Figure 6 It is a schematic diagram of the structure of the upper cover plate of the utility model.

[0038] The accompanying drawings are marked as follows: 1. transformer body; 2. fixed cross bar; 3. protective shell; 4. motor; 5. first gear; 6. second gear; 7. rotating rod; 8. thread; 9. limiting ring; 10. threaded moving plate; 11. pressure roller; 12. pressure plate; 13. plug-in column; 14. spring; 15. pop-up block; 16. slide groove; 17. buffer pad; 18. winding assembly; 19. cover plate; 20. fixed collar; 21. button; 22. load-bearing pad; 23. support plate; 24. buffer rubber pad. DETAILED DESCRIPTION

[0039] 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.

[0040] The embodiment of the present application discloses a transformer axial pre-tightening mechanism, which specifically includes a transformer body 1, two fixed cross bars 2 are fixedly connected to the bottom of the transformer body 1, and a pressing mechanism is fixedly connected inside the transformer body 1;

[0041] The pressing mechanism includes a protective shell 3, a motor 4 is fixedly connected to the outside of the protective shell 3, a first gear 5 is coaxially connected to the output end of the motor 4, second gears 6 are movably connected to both sides of the first gear 5, rotating rods 7 are fixedly connected to the inside of the two second gears 6, two threads 8 are arranged inside the two rotating rods 7, a plurality of limit rings 9 are fixedly connected to the outside of the two rotating rods 7, two threaded moving plates 10 are movably connected to the outside of the plurality of threads 8, pressure rollers 11 are movably connected to the bottom of the two threaded moving plates 10, and a pressure plate 12 is movably connected to the bottom of the two pressure rollers 11, and the two pressure rollers 11 are driven by the threaded moving plate 10 to press the pressure plate 12 downward, so that the pressure plate 12 can move more smoothly under the slow rolling of the two pressure rollers 11.

[0042] Reference Figure 2 As shown, specifically, two load-bearing pads 22 are fixedly connected to the bottom of the lower cover plate 19, three support plates 23 are fixedly connected to the bottom side of the inner wall of the transformer body 1, and buffer rubber pads 24 are fixedly connected to the tops of the three support plates 23, which can improve the stability of the winding assembly 18 during the process of pressing the winding assembly 18 downward.

[0043] Reference Figure 5 As shown, specifically, a plurality of plugs 13 are fixedly connected to the bottom of the pressure plate 12, two springs 14 are movably connected inside the plurality of plugs 13, a pop-up block 15 is fixedly connected to one end of the plurality of springs 14, two slide grooves 16 are arranged on the top of the pressure plate 12, the two slide grooves 16 are symmetrically distributed on the top of the pressure plate 12, a plurality of buffer pads 17 are fixedly connected to the bottom of the pressure plate 12, so that the pressure plate 12 can be quickly and stably connected to the cover plate 19 on the top of the winding assembly 18.

[0044] Working principle of the utility model: when in use, when the winding assembly 18 inside the transformer is operating under load, the vibration generated will cause the winding assembly 18 to loosen. When the winding assembly 18 is loose, the motor 4 drives the first gear 5 to drive the second gears 6 on both sides to rotate in the same direction, and the two second gears 6 drive the corresponding rotating rods 7 to rotate. When the two rotating rods 7 move the threaded moving plates 10 on the outer sides of the rotating rods 7 in opposite directions through the corresponding multiple threads 8, the two threaded moving plates 10 drive the pressure rollers 11 to move on the outer sides of the rotating rods 7, so that the pressure rollers 11 press the pressure plate 12 downward, and the pressure plate 12 is plugged into the multiple fixing rings 20 on the outer side of the upper cover plate 19 through the multiple plugs 13 at the bottom, so that the multiple pop-up blocks 15 inside the multiple plugs 13 are The corresponding multiple springs 14 extend outward and are plugged into the slots inside the multiple fixing rings 20, and then the multiple buffer pads 17 at the bottom of the pressure plate 12 are fitted with the top of the cover plate 19, so that when the winding assembly 18 vibrates, the pressure plate 12 and the cover plate 19 always maintain a stable connection, so that the two pressure rollers 11 can pre-tighten the winding assembly 18 through the pressure plate 12, so that the winding assembly 18 is more stable during the load process. At the same time, when the winding assembly 18 is pressed downward, the bottom side of the cover plate 19 at the bottom of the winding assembly 18 contacts the three support plates 23 and the buffer rubber pads 24 at the bottom of the transformer body 1, so that the winding assembly 18 is buffered to a certain extent during the downward pressing process, so that the winding assembly 18 is more stable in subsequent operations and the wear of the winding assembly 18 is reduced.

[0045] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A transformer axial preload mechanism, comprising a transformer body (1), characterized in that: Two fixed cross bars (2) are fixedly connected to the bottom of the transformer body (1), and a downward pressing mechanism is fixedly connected inside the transformer body (1); The pressing mechanism comprises a protective shell (3), the outer side of the protective shell (3) is fixedly connected to a motor (4), the output end of the motor (4) is coaxially connected to a first gear (5), both sides of the first gear (5) are movably connected to second gears (6), the insides of the two second gears (6) are fixedly connected to a rotating rod (7), the insides of the two rotating rods (7) are provided with two threads (8), the outer sides of the two rotating rods (7) are fixedly connected to a plurality of limit rings (9), the outer sides of the plurality of threads (8) are movably connected to two threaded movable plates (10), the bottoms of the two threaded movable plates (10) are movably connected to pressure rollers (11), and the bottoms of the two pressure rollers (11) are movably connected to a pressure plate (12).

2. The transformer axial preload mechanism according to claim 1, characterized in that: A plurality of plugs (13) are fixedly connected to the bottom of the pressure plate (12), two springs (14) are movably connected inside the plurality of plugs (13), and one end of the plurality of springs (14) is fixedly connected to a pop-up block (15).

3. The transformer axial preload mechanism according to claim 1, characterized in that: Two slide grooves (16) are arranged on the top of the pressing plate (12), and the two slide grooves (16) are symmetrically distributed on the top of the pressing plate (12). A plurality of buffer pads (17) are fixedly connected to the bottom of the pressing plate (12).

4. The transformer axial preload mechanism according to claim 1, characterized in that: A winding assembly (18) is fixedly connected inside the transformer body (1), and cover plates (19) are fixedly connected to both the upper and lower sides of the winding assembly (18).

5. The transformer axial preload mechanism according to claim 4, characterized in that: A plurality of fixing rings (20) are fixedly connected to the outer side of the upper cover plate (19), buttons (21) are movably connected to both sides of the outer sides of the plurality of fixing rings (20), and two load-bearing pads (22) are fixedly connected to the bottom of the lower cover plate (19).

6. The transformer axial preload mechanism according to claim 5, characterized in that: The plurality of fixing collars (20) are symmetrically distributed on the front and rear sides of the cover plate (19), and the plurality of buttons (21) are symmetrically distributed inside the plurality of fixing collars (20).

7. The transformer axial preload mechanism according to claim 1, characterized in that: Three support plates (23) are fixedly connected to the bottom side of the inner wall of the transformer body (1), and buffer rubber pads (24) are fixedly connected to the tops of the three support plates (23).

Images