Noise reduction structure for joint of iron core and oil tank of large power transformer

Abstract

The utility model discloses a noise reduction structure for the joint of a large power transformer iron core and an oil tank. The noise reduction structure comprises a noise reduction rubber pad body and a noise reduction assembly which are used for noise reduction of the joint of the large power transformer iron core and the oil tank. The noise reduction assembly is arranged in the noise reduction rubber pad body; the noise reduction assembly comprises a noise reduction groove, a supporting block, a buffer groove, a buffer block and a buffer spring. A noise reduction groove is formed in the noise reduction rubber pad body; the multiple supporting blocks are evenly and fixedly arranged on the inner wall of one side of the noise reduction groove. A buffer groove is formed in the supporting block; the buffer block is arranged in the buffer groove, and the end of the buffer block penetrates through the buffer groove to be connected with the inner wall of the other side of the noise reduction groove. According to the noise reduction structure, noise at the joint of the iron core and the oil tank of the large power transformer can be effectively reduced, and the noise reduction effect is good.

Description

Technical Field

[0001] This utility model relates to the field of transformer manufacturing technology, specifically to a noise reduction structure used at the connection between the core and the tank of a large power transformer. Background Technology

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

[0003] A transformer tank noise reduction structure, as disclosed in Chinese Utility Model Patent No. CN208352108U, includes a tank wall, a support plate, and a frame extending from the edge of the support plate to the tank wall. The frame is fixedly connected to the tank wall, and there is a gap between the support plate and the tank wall. Thin steel plates are stacked and fixedly connected to the support plate. The thickness of the thin steel plates is not less than 0.2 mm and not more than 0.8 mm. The support plate has multiple first through holes, and the areas on the thin steel plates corresponding to the multiple first through holes respectively form multiple thin steel plate units. A mass block is fixedly connected to each thin steel plate unit, and each thin steel plate unit has multiple second through holes located around the mass block. This utility model can improve the noise reduction performance of transformer tanks 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 upgrades, substations are increasingly being built into residential areas. Noise is a crucial indicator affecting people's comfort, leading to increasingly stringent requirements from customers regarding transformer sound levels. Transformer sound level has become an important technical parameter and a key indicator of a transformer manufacturer's design and production capabilities. Inside the transformer, the core and tank are two independent components, and the connection between the core and tank is one of the main sources of transformer noise. Therefore, noise reduction treatment at the connection between the transformer core and tank is an important noise reduction measure. Utility Model Content

[0005] The purpose of this invention is to provide a noise reduction structure for the connection between the core and the tank of a large power transformer, so as to solve the problem of poor noise reduction effect at the connection between the core and the tank of a large power transformer mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a noise reduction structure for the connection between the core and tank of a large power transformer, comprising a noise-reducing rubber pad body and a noise reduction component for noise reduction at the connection between the core and tank of a large power transformer; the noise reduction component is arranged within the body of the noise-reducing rubber pad; the noise reduction component includes a noise-reducing groove, a support block, a buffer groove, a buffer block, and a buffer spring; a noise-reducing groove is formed within the body of the noise-reducing rubber pad; several support blocks are uniformly fixed to one inner wall of the noise-reducing groove; a buffer groove is formed on the support block; the buffer block is disposed within 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-reducing groove; both ends of the buffer spring are fixedly connected to the inner wall of the buffer groove and the buffer block, respectively.

[0007] Preferably, the buffer block and the buffer groove are in sliding engagement.

[0008] Preferably, the buffer block has a T-shaped structure with a smaller top and a larger bottom, and the T-shaped end of the buffer block is in contact with the inner wall of the buffer groove.

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

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

[0011] Preferably, the fixing spring has a V-shaped structure, and the tips of the two fixing springs are arranged opposite each other.

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

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model, by setting up a noise reduction component, fixes the noise reduction rubber pad body to the connection between the core and the tank of a large power transformer with bolts. The noise reduction rubber pad body absorbs the vibration generated by the core and tank of the large power transformer during operation, thus achieving a preliminary noise reduction effect. The vibration force absorbed by the noise reduction rubber pad body is transmitted to the buffer block, causing the buffer block to slide in the buffer groove, causing the buffer spring to contract under force, thus buffering the vibration force and achieving a further noise reduction effect. Compared with the prior art, this utility model has a simple and reasonable structure and ingenious design, which can effectively reduce the noise at the connection between the core and tank of a large power transformer, and the noise reduction effect is better.

[0015] 2. By setting up a pressure-bearing component, the vibration force absorbed by the noise-reducing rubber pad body is also transmitted to the fixed plate A and the fixed plate B, causing the fixed plate A and the fixed plate B to move relative to each other, causing the fixed spring to deform under force, so that the fixed spring can buffer the vibration force again, thereby achieving a further noise reduction effect. Attached Figure Description

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

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

[0018] Figure 3 This is a partial structural breakdown diagram of Example 1;

[0019] Figure 4 As in Example 1 Figure 2 Enlarged view of point A in the middle;

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

[0021] In the picture:

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

[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. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1:

[0027] Please see Figures 1 to 4This utility model provides a technical solution: a noise reduction structure for the connection between the core and tank of a large power transformer, comprising a noise-reducing rubber pad body 1 and a noise reduction component 2 for noise reduction at the connection between the core and tank of a large power transformer; the noise reduction component 2 is arranged inside the noise-reducing rubber pad body 1; the noise reduction component 2 includes 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 has a noise reduction groove 201; a plurality of support blocks 202 are evenly fixed to one side of the inner wall of the noise reduction groove 201; the support blocks 202... A buffer groove 203 is provided on the top; a buffer block 204 is slidably disposed 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 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 subjected to vibration; the two ends of the buffer spring 205 are fixedly connected to the inner wall of the buffer groove 203 and the buffer block 204 respectively; the buffer block 204 has a T-shaped structure with a smaller top and a larger bottom, and the T-shaped end of the buffer block 204 contacts the inner wall of the buffer groove 203.

[0028] This invention, by setting a noise reduction component 2, fixes the noise reduction rubber pad body 1 to the connection between the core and the tank of a large power transformer with bolts. The noise reduction rubber pad body 1 absorbs the vibration generated by the core and tank during operation, thus achieving a preliminary noise reduction effect. The vibration force absorbed by the noise reduction rubber pad body 1 is transmitted to the buffer block 204, causing the buffer block 204 to slide in the buffer groove 203. This causes the buffer spring 205 to contract under force, thus buffering the vibration force and achieving a further noise reduction effect. Compared with the prior art, this invention has a simple and reasonable structure and ingenious design, which can effectively reduce the noise at the connection between the core and tank of a large power transformer, and has a better noise reduction effect.

[0029] As a preferred embodiment, it also includes a pressure-bearing component 3; the pressure-bearing component 3 is arranged inside the noise reduction groove 201; the pressure-bearing component 3 includes a fixing plate A301, a fixing plate B302 and a fixing spring 303; several fixing plates A301 and B302 are symmetrically fixed in a linear array on both sides of the inner wall of the noise reduction groove 201; two fixing springs 303 are symmetrically arranged on both sides of the fixing plates A301 and B302, and the two ends of the fixing springs 303 are fixedly connected to the ends of the fixing plates A301 and B302; the fixing springs 303 have a V-shaped structure, and the tips of the two fixing springs 303 are set opposite to each other; the fixing plates A301, B302 and the two fixing springs 303 constitute a noise reduction cavity at the connection between the core and the tank of a hexagonal large power transformer; when the buffer spring 205 is contracted to its maximum extent, the fixing springs 303 can still deform.

[0030] By setting up a pressure-bearing component 3, the vibration force absorbed by the noise-reducing rubber pad body 1 is also transmitted to the fixing plate A301 and fixing plate B302, causing the fixing plate A301 and fixing plate B302 to move relative to each other, causing the fixing spring 303 to deform under force, so that the fixing spring 303 can buffer the vibration force again, thereby achieving a further noise reduction effect.

[0031] Example 2:

[0032] Please see Figure 5 A noise reduction structure for the connection between the core and the tank of a large power transformer includes a core pad 4, a noise reduction rubber pad 5, a pad insulation 6, a small round steel bar 7, and a positioning pin 8. The noise reduction rubber pad 5 is close to the bottom of the transformer tank, and the pad insulation 6 is provided between the noise reduction rubber pad 5 and the core pad 4. The noise reduction rubber pad 5 and the pad insulation 6 are limited by the small round steel bar 7 at the bottom of the tank. The core and the pad form an integral core, and the integral core is connected and fixed to the tank by the positioning pin 8.

[0033] This invention, by introducing a noise-reducing rubber pad 5 and placing it at the main noise source inside the transformer, can effectively reduce the noise at the connection between the two independent components of the transformer core and the oil tank. It is practical, easy to produce, highly adaptable, and solves the background problems.

[0034] This invention has been applied to multiple transformer products, achieving noise reduction of 2-3 dB, with good practical results.

[0035] Working principle: In use, the noise-reducing rubber pad body 1 is fixed to the connection between the core and the tank of the large power transformer by bolts. The noise-reducing rubber pad body 1 absorbs the vibration generated by the core and tank of the large power transformer during operation to achieve a preliminary noise reduction effect. The vibration force absorbed by the noise-reducing rubber pad body 1 is transmitted to the buffer block 204, causing the buffer block 204 to slide in the buffer groove 203. This causes the buffer spring 205 to contract under force, allowing the buffer spring 205 to buffer the vibration force for a second noise reduction effect. The vibration force absorbed by the noise-reducing rubber pad body 1 is also transmitted to the fixing plate A301 and the fixing plate B302, causing the fixing plate A301 and the fixing plate B302 to move relative to each other. This causes the fixing spring 303 to deform under force, allowing the fixing spring 303 to buffer the vibration force again for a further noise reduction effect.

[0036] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

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

Claims

1. A noise reduction structure for the connection between the core and tank of a large power transformer, characterized in that, The system includes a noise-reducing rubber pad body (1) and a noise-reducing component (2) for noise reduction at the connection between the core and tank of a large power transformer; the noise-reducing component (2) is arranged inside the noise-reducing rubber pad body (1); the noise-reducing component (2) includes a noise-reducing groove (201), a support block (202), a buffer groove (203), a buffer block (204), and a buffer spring (205); the noise-reducing rubber pad body (1) has a noise-reducing groove (201); a plurality of the support blocks (202) are arranged inside the support block (1). The support block (202) is uniformly fixed on one side of the inner wall of the noise reduction groove (201); the support block (202) is provided with a buffer groove (203); the buffer block (204) is located 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 fixedly connected to the inner wall of the buffer groove (203) and the buffer block (204) respectively.

2. The noise reduction structure for the connection between the core and the tank of a large power transformer according to claim 1, characterized in that, The buffer block (204) and the buffer groove (203) are in sliding fit.

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

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

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

6. A noise reduction structure for the connection between the core and tank of a large power transformer according to claim 5, characterized in that, The fixing spring (303) has a V-shaped structure, and the tips of the two fixing springs (303) are set on opposite sides.

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

Images