A noise reduction structure for the connection between the iron core and the oil tank of a large power transformer

Abstract

The invention discloses a noise reduction structure for the connection between the iron core and the oil tank of a large-scale power transformer, comprising a noise reduction rubber pad body and a noise reduction component for reducing noise at the connection between the iron core and the oil tank of the large-scale power transformer; the noise reduction component is arranged in the noise reduction rubber pad body; the noise reduction component comprises a noise reduction groove, a support block, a buffer groove, a buffer block and a buffer spring; a noise reduction groove is provided in the noise reduction rubber pad body; a plurality of support blocks are evenly fixed on the inner wall of one side of the noise reduction groove; a buffer groove is provided on the support block; the buffer block is arranged in the buffer groove, and the end of the buffer block passes through the buffer groove and is connected to the inner wall of the other side of the noise reduction groove; the two ends of the buffer spring are respectively connected to the inner wall of the buffer groove and the buffer block. The noise reduction structure can effectively reduce the noise at the connection between the iron core and the oil tank of the large-scale power transformer, and the noise reduction effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of transformer manufacturing, in particular to a noise reduction structure used for the connection between an iron core and an oil tank of a large power transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, secondary coil and iron core (magnetic core). Its main functions include: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc. Transformers are basic equipment for power transmission and distribution, and are widely used in industry, agriculture, transportation, urban communities and other fields.

[0003] For example, a transformer oil tank noise reduction structure provided by the Chinese invention patent with publication number CN208352108U includes an oil tank wall, a support plate, and a frame extending from the edge of the support plate to the oil tank wall, the frame is fixedly connected to the oil tank wall, there is a gap between the support plate and the oil tank wall, a thin steel plate is stacked and fixedly connected on the support plate, the thickness of the thin steel plate is not less than 0.2mm and not more than 0.8mm, a plurality of first through holes are provided on the support plate, and the areas corresponding to the plurality of first through holes on the thin steel plate form a plurality of thin steel plate units respectively, each thin steel plate unit is fixedly connected to a mass block, and each thin steel plate unit is provided with a plurality of second through holes located at the periphery of the mass block. The present invention can improve the noise reduction performance of the transformer oil tank, and has the advantages of small space occupation, wide noise reduction bandwidth, and long service life.

[0004] With the continuous advancement of urbanization and the need for urban power grid transformation, substations are increasingly embedded in residential areas, and noise is a very important indicator that affects people's comfort, so customers are becoming more and more stringent in their requirements for transformer sound levels. Transformer sound level has become an important technical parameter of the transformer and one of the important indicators for measuring the design and production capabilities of transformer manufacturers. Inside the transformer, the iron core and the oil tank are two independent components, and the connection between the iron core and the oil tank is one of the main sources of transformer noise. Therefore, noise reduction treatment for the connection between the transformer iron core and the oil tank is an important noise reduction measure. Summary of the invention

[0005] The object of the present invention is to provide a noise reduction structure for the connection between the iron core and the oil tank of a large power transformer, so as to solve the problem of poor noise reduction effect at the connection between the iron core and the oil tank of a large power transformer proposed in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a noise reduction structure for the connection between the iron core and the oil tank of a large power transformer, comprising a noise reduction rubber pad body and a noise reduction component for noise reduction at the connection between the iron core and the oil tank of a large power transformer; the noise reduction component is arranged in the noise reduction rubber pad body; the noise reduction component comprises a noise reduction groove, a support block, a buffer groove, a buffer block and a buffer spring; a noise reduction groove is provided in the noise reduction rubber pad body; a plurality of support blocks are evenly fixed on the inner wall of one side of the noise reduction groove; a buffer groove is provided on the support block; the buffer block is arranged in the buffer groove, and the end of the buffer block passes through the buffer groove and is fixedly connected to the inner wall of the other side of the noise reduction groove; the two ends of the buffer spring are respectively fixedly connected to the inner wall of the buffer groove and the buffer block.

[0007] Preferably, the buffer block is slidably matched with the buffer groove.

[0008] Preferably, the buffer block is a T-shaped structure with a small upper portion and a large lower portion, and the T-shaped end of the buffer block contacts the inner wall of the buffer groove.

[0009] Preferably, it also includes a pressure-bearing component; the pressure-bearing component is arranged in the noise reduction groove.

[0010] Preferably, the pressure-bearing component includes a fixed plate A, a fixed plate B and a fixed spring sheet; a plurality of the fixed plates A and the fixed plates B are symmetrically fixed in a linear array on both sides of the inner wall of the noise reduction groove; two of the fixed spring sheets are symmetrically arranged on both sides of the fixed plate A and the fixed plate B, and the two ends of the fixed spring sheets are fixedly connected to the end of the fixed plate A and the end of the fixed plate B.

[0011] Preferably, the fixing spring piece is a V-shaped structure, and the two fixing spring piece tips are arranged at opposite sides.

[0012] Preferably, the fixing plate A, the fixing plate B and the two fixing springs constitute a noise reduction cavity at the connection between the iron core and the oil tank of the hexagonal large power transformer.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention sets a noise reduction component, and fixes the noise reduction rubber pad body at the connection between the large power transformer core and the oil tank by bolts. The noise reduction rubber pad body absorbs the vibration generated by the large power transformer core and the oil tank during operation to achieve a preliminary noise reduction effect, and the vibration force absorbed by the noise reduction rubber pad body will be transmitted to the buffer block, so that the buffer block slides in the buffer groove, the buffer spring is forced to contract, and the buffer spring can buffer the vibration force to achieve a second noise reduction effect. Compared with the prior art, the present invention has a simple and reasonable structure and a clever design, can effectively reduce the noise at the connection between the large power transformer core and the oil tank, and has a good noise reduction effect.

[0015] 2. The present invention arranges a pressure-bearing component so that the vibration force absorbed by the noise reduction rubber pad body is also transmitted to the fixed plate A and the fixed plate B, so that the fixed plate A and the fixed plate B move relative to each other, so that the fixed spring sheet is deformed under the force, and the fixed spring sheet can buffer the vibration force again to achieve a further noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of Example 1;

[0017] Figure 2 It is a cross-sectional view of the overall structure of Example 1;

[0018] Figure 3 This is a schematic diagram of the partial structural disassembly of Example 1;

[0019] Figure 4 For Example 1 Figure 2 The enlarged schematic diagram at A in the middle;

[0020] Figure 5 This is a schematic diagram of the overall structure of Example 2.

[0021] In the figure:

[0022] 1. Noise reduction rubber pad body; 2. Noise reduction component; 3. Pressure bearing component; 4. Iron core pad; 5. Noise reduction rubber pad; 6. Pad insulation; 7. Small round steel; 8. Positioning nail;

[0023] 201, noise reduction groove; 202, support block; 203, buffer groove; 204, buffer block; 205, buffer spring;

[0024] 301, fixing plate A; 302, fixing plate B; 303, fixing spring piece. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] See also Figures 1 to 4The present invention provides a technical solution: a noise reduction structure for the connection between the iron core and the oil tank of a large power transformer, comprising a noise reduction rubber pad body 1 and a noise reduction component 2 for noise reduction at the connection between the iron core and the oil tank of a large power transformer; the noise reduction component 2 is arranged in the noise reduction rubber pad body 1; the noise reduction component 2 comprises a noise reduction groove 201, a support block 202, a buffer groove 203, a buffer block 204 and a buffer spring 205; a noise reduction groove 201 is opened in the noise reduction rubber pad body 1; a plurality of support blocks 202 are evenly fixed on the inner wall of one side of the noise reduction groove 201; the support blocks 202 are arranged on the inner wall of the support blocks 202. A buffer groove 203 is provided; a buffer block 204 is slidably arranged in the buffer groove 203, and an end of the buffer block 204 passes through the buffer groove 203 and is fixedly connected to the inner wall of the other side of the noise reduction groove 201; the support block 202 and the buffer block 204 can fix the position of the noise reduction rubber pad body 1 to prevent the noise reduction rubber pad body 1 from shaking when it is vibrated; the two ends of the buffer spring 205 are respectively fixedly connected to the inner wall of the buffer groove 203 and the buffer block 204; the buffer block 204 is a T-shaped structure with a small upper part and a large lower part, and the T-shaped end of the buffer block 204 contacts the inner wall of the buffer groove 203.

[0028] The present invention sets a noise reduction component 2, and fixes the noise reduction rubber pad body 1 at the connection between the large power transformer core and the oil tank by bolts. The noise reduction rubber pad body 1 will absorb the vibration generated by the large power transformer core and the oil tank during operation to achieve a preliminary noise reduction effect, and the vibration force absorbed by the noise reduction rubber pad body 1 will be transmitted to the buffer block 204, so that the buffer block 204 slides in the buffer groove 203, and the buffer spring 205 is forced to contract, so that the buffer spring 205 can buffer the vibration force to achieve a second noise reduction effect. Compared with the prior art, the present invention has a simple and reasonable structure and a clever design, can effectively reduce the noise at the connection between the large power transformer core and the oil tank, and has a good noise reduction effect.

[0029] As a preferred embodiment, it also includes a pressure-bearing component 3; the pressure-bearing component 3 is arranged in the noise reduction groove 201; the pressure-bearing component 3 includes a fixed plate A301, a fixed plate B302 and a fixed spring piece 303; a plurality of fixed plates A301 and fixed plates B302 are symmetrically fixed on both sides of the inner wall of the noise reduction groove 201 in a linear array; two fixed spring pieces 303 are symmetrically arranged on both sides of the fixed plate A301 and the fixed plate B302, and the two ends of the fixed spring piece 303 are fixedly connected to the end of the fixed plate A301 and the end of the fixed plate B302; the fixed spring piece 303 is a V-shaped structure, and the tips of the two fixed spring pieces 303 are arranged on opposite sides; the fixed plate A301, the fixed plate B302 and the two fixed spring pieces 303 constitute a noise reduction cavity at the connection between the hexagonal large power transformer core and the oil tank; when the buffer spring 205 is contracted to the maximum limit, the fixed spring piece 303 can still be deformed.

[0030] The present invention sets a pressure-bearing component 3 so that the vibration force absorbed by the noise reduction rubber pad body 1 will also be transmitted to the fixed plate A301 and the fixed plate B302, so that the fixed plate A301 and the fixed plate B302 move relative to each other, so that the fixed spring plate 303 is deformed under the force, and the fixed spring plate 303 can buffer the vibration force again to achieve a further noise reduction effect.

[0031] Embodiment 2:

[0032] See also Figure 5 A noise reduction structure for the connection between the iron core and the oil tank of a large power transformer comprises an iron core pad 4, a noise reduction rubber pad 5, a pad insulation 6, a small round steel 7 and a positioning nail 8; the noise reduction rubber pad 5 is close to the bottom of the oil tank of the transformer, and a pad insulation 6 is arranged between the noise reduction rubber pad 5 and the iron core pad 4, the noise reduction rubber pad 5 and the pad insulation 6 are limited by the small round steel 7 at the bottom of the oil tank, the iron core and the pad constitute an integral iron core, and the integral iron core is connected and fixed to the oil tank by the positioning nail 8.

[0033] The present invention introduces a noise reduction rubber pad 5 and places it at the main noise source inside the transformer, which can effectively reduce the noise at the connection between the transformer core and the oil tank, two independent components. It is practical, easy to produce, highly adaptable, and solves the background problem.

[0034] The present invention has been applied to a number of transformer products, and can achieve a noise reduction of 2-3 dB, with good practical effects.

[0035] Working principle: When in use, the noise reduction rubber pad body 1 is fixed to the connection between the large power transformer core and the oil tank by bolts. The noise reduction rubber pad body 1 will absorb the vibration generated by the large power transformer core and the oil tank during operation to achieve a preliminary noise reduction effect, and the vibration force absorbed by the noise reduction rubber pad body 1 will be transmitted to the buffer block 204, so that the buffer block 204 slides in the buffer groove 203, so that the buffer spring 205 is forced to contract, so that the buffer spring 205 can buffer the vibration force to achieve a second noise reduction effect, and the vibration force absorbed by the noise reduction rubber pad body 1 will also be transmitted to the fixed plate A301 and the fixed plate B302, so that the fixed plate A301 and the fixed plate B302 move relative to each other, so that the fixed spring sheet 303 is forced to deform, so that the fixed spring sheet 303 can buffer the vibration force again to achieve a further noise reduction effect.

[0036] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A noise reduction structure for the connection between the iron core and the oil tank of a large power transformer, characterized in that: The invention comprises a noise reduction rubber pad body (1) and a noise reduction component (2) for reducing noise at the connection between the iron core and the oil tank of a large power transformer; the noise reduction component (2) is arranged in the noise reduction rubber pad body (1); the noise reduction component (2) comprises a noise reduction groove (201), a support block (202), a buffer groove (203), a buffer block (204) and a buffer spring (205); the noise reduction rubber pad body (1) is provided with a noise reduction groove (201); a plurality of the support blocks (202) and a buffer block (204) are provided. The support block (202) is evenly fixed on the inner wall of one side of the noise reduction groove (201); the support block (202) is provided with a buffer groove (203); the buffer block (204) is arranged in the buffer groove (203), and the end of the buffer block (204) passes through the buffer groove (203) and is fixedly connected to the inner wall of the other side of the noise reduction groove (201); the two ends of the buffer spring (205) are respectively fixedly connected to the inner wall of the buffer groove (203) and the buffer block (204).

2. The noise reduction structure for the connection between the iron core and the oil tank of a large power transformer according to claim 1 is characterized in that: The buffer block (204) is slidably matched with the buffer groove (203).

3. The noise reduction structure for the connection between the iron core and the oil tank of a large power transformer according to claim 2 is characterized in that: The buffer block (204) is a T-shaped structure with a small top and a large bottom, and the T-shaped end of the buffer block (204) is in contact with the inner wall of the buffer groove (203).

4. The noise reduction structure for the connection between the iron core and the oil tank of a large power transformer according to claim 1 is characterized in that: It also comprises a pressure-bearing component (3); the pressure-bearing component (3) is arranged in the noise reduction groove (201).

5. The noise reduction structure for the connection between the iron core and the oil tank of a large power transformer according to claim 4 is characterized in that: The pressure-bearing component (3) comprises a fixing plate A (301), a fixing plate B (302) and a fixing spring sheet (303); a plurality of the fixing plates A (301) and the fixing plates B (302) are symmetrically fixed on both sides of the inner wall of the noise reduction groove (201) in a linear array; two fixing spring sheets (303) are symmetrically arranged on both sides of the fixing plate A (301) and the fixing plate B (302), and two ends of the fixing spring sheet (303) are fixedly connected to the end of the fixing plate A (301) and the end of the fixing plate B (302).

6. The noise reduction structure for the connection between the iron core and the oil tank of a large power transformer according to claim 5, characterized in that: The fixing spring pieces (303) are of a V-shaped structure, and the tips of the two fixing spring pieces (303) are arranged at opposite sides.

7. A noise reduction structure for the connection between the core and the oil tank of a large power transformer according to claim 6, characterized in that: The fixing plate A (301), the fixing plate B (302) and the two fixing spring sheets (303) form a noise reduction cavity at the connection between the iron core and the oil tank of a hexagonal large power transformer.

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