Dry-type transformer with noise reduction structure

Abstract

The utility model relates to dry -type transformer technical field, concretely relates to a dry -type transformer with noise reduction structure, including base and transformer body, the base fixed setting at the bottom of transformer body, the transformer body includes transformer shell, the inside fixed setting of transformer shell has the iron core post. The utility model discloses by the longitudinal damping structure that installation seat, bottom disc and composite damper are composed, can absorb and attenuate the longitudinal slight vibration that the winding caused because of electromagnetic force and iron core magnetostriction, by installation seat, bottom disc, movable block, sleeve, limit sliding block, spring shock absorber and telescopic column composition's transverse damping structure, can absorb and attenuate the transverse slight vibration that the winding caused because of electromagnetic force and iron core magnetostriction, make the path on vibration transmission from the iron core post to transformer shell and carry out the block, this can effectively isolate the transmission of iron core post vibration to bottom disc and base.

Description

Technical Field

[0001] This utility model relates to the field of dry-type transformer technology, specifically to a dry-type transformer with a noise reduction structure. Background Technology

[0002] Dry-type transformers are CNC machine tools used in local lighting, high-rise buildings, airports, and docks. The dry-type transformers currently in use have the advantages of safety, fire resistance, no pollution, high mechanical strength, strong short-circuit resistance, good thermal stability, high reliability, and long service life.

[0003] A search revealed a utility model patent with publication number CN219349971U, which specifically discloses a dry-type transformer with a noise reduction structure. The transformer includes a base, a built-in soundproof box, and a noise reduction plate. The dry-type transformer is fixedly mounted on the top of the base. Soundproof plates are mounted on both sides of the dry-type transformer. The built-in soundproof box is located inside the dry-type transformer, and the noise reduction plate is located on the front side of the inside of the built-in soundproof box. Second springs are fixedly mounted on both sides of the noise reduction plate, and insert plates are fixedly mounted on the other ends of the second springs. In this utility model, the built-in soundproof box, noise reduction plate, insert plates, and sealing plate, along with the separate built-in soundproof box and noise reduction plate, can reduce noise in the internal components. The detachable noise reduction structure design greatly facilitates maintenance of the internal components of the built-in soundproof box, while avoiding increasing the size of the dry-type transformer and affecting its normal installation and operation.

[0004] The aforementioned patent only uses a built-in soundproof box, noise reduction plate, insert plate, and sealing plate. The separate built-in soundproof box, together with the noise reduction plate, can reduce noise for the components placed inside. The design of the detachable noise reduction structure greatly facilitates the maintenance of the components inside the built-in soundproof box by the staff. At the same time, it avoids increasing the size of the dry-type transformer and affecting the normal installation and operation of the dry-type transformer. However, it cannot fully solve the vibration problem caused by the magnetostriction of the iron core, which is the main source of noise. This vibration will be directly transmitted to the transformer shell through the iron core and the mounting base, causing the shell to vibrate and radiating noise into the air.

[0005] Therefore, it is necessary to invent a dry-type transformer with a noise reduction structure to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a dry-type transformer with a noise reduction structure. The longitudinal vibration reduction structure, composed of a mounting base, chassis, and composite vibration damper, absorbs and attenuates the minute longitudinal vibrations of the windings caused by electromagnetic force and magnetostriction of the core. The transverse vibration reduction structure, composed of a mounting base, chassis, movable block, sleeve, limit slider, spring damper, and telescopic column, absorbs and attenuates the minute transverse vibrations of the windings caused by electromagnetic force and magnetostriction of the core. This blocks the path of vibration transmission from the core column to the transformer casing, effectively isolating the transmission of core column vibration to the chassis and base. This solves the problem in existing technologies where the vibration caused by the main noise source, magnetostriction of the core, cannot be adequately addressed. This vibration is directly transmitted to the transformer casing through the core and mounting base, causing casing vibration and radiating noise into the air.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A dry-type transformer with a noise reduction structure includes a base and a transformer body. The base is fixedly disposed at the bottom of the transformer body. The transformer body includes a transformer shell. An iron core column is fixedly disposed inside the transformer shell. A mounting seat is fixedly connected to the bottom of the iron core column. A chassis is fixedly connected to the bottom wall inside the transformer shell. A composite vibration damper is fixedly connected between the mounting seat and the chassis. The number of composite vibration dampers is set to multiple. Two movable slots are symmetrically opened on both sides of the inner wall of the chassis. A movable block is hinged inside the movable slot. A sleeve is fixedly connected to the side of the movable block. A limit slider is slidably disposed inside the sleeve. A spring vibration damper is fixedly connected between the limit slider and the sleeve. A telescopic column penetrating the sleeve is fixedly connected to the side of the limit slider away from the spring vibration damper. Two movable slots are symmetrically opened on both sides of the mounting seat. The end of the telescopic column is hinged to the movable slot.

[0008] Preferably, the positions of the second movable slot and the first movable slot are respectively arranged to correspond.

[0009] Preferably, the sidewalls of the transformer housing are filled with environmentally friendly polymer sound-absorbing foam.

[0010] Preferably, the transformer housing includes mesh-like reinforcing ribs.

[0011] Preferably, the inner wall of the transformer housing is adhered with a constraint layer damping material, which includes viscoelastic damping adhesive and aluminum foil.

[0012] Preferably, a fixing plate is fixedly provided on both sides and the front and rear sides of the base, a buffer frame is hinged on the fixing plate, and a buffer spring is fixedly connected between the buffer frame and the side surface of the base.

[0013] Preferably, a rubber vibration damping pad is fixedly installed on the upper end of the buffer frame near the transformer body, and the rubber vibration damping pad is tightly attached to the outer surface of the transformer shell.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows: The longitudinal vibration damping structure, consisting of a mounting base, chassis, and composite vibration damper, can absorb and attenuate the minor longitudinal vibrations of the winding caused by electromagnetic force and magnetostriction of the iron core. The transverse vibration damping structure, consisting of a mounting base, chassis, movable block, sleeve, limit slider, spring vibration damper, and telescopic column, can absorb and attenuate the minor transverse vibrations of the winding caused by electromagnetic force and magnetostriction of the iron core, thus blocking the path of vibration transmission from the iron core column to the transformer casing. This can effectively isolate the transmission of iron core column vibration to the chassis and base. By filling the cavity inside the transformer casing with porous sound-absorbing material made of environmentally friendly polymer sound-absorbing foam, reverberation sound in the cavity inside the transformer body can be effectively absorbed, preventing sound from being amplified after multiple reflections inside the casing. The main structural design of the transformer body and the matching top cover, using grid-like reinforcing ribs, effectively increases the rigidity of the transformer casing. The greater the rigidity, the smaller the vibration amplitude and the lower the radiated noise under the same excitation force. By attaching a constraint layer damping material composed of viscoelastic damping adhesive and aluminum foil to the inner wall of the transformer casing, when the transformer casing vibrates, the damping layer will undergo shear deformation, converting mechanical energy into heat energy, thereby effectively suppressing vibration. This is a very effective means of casing noise reduction. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection structure between the base and the buffer frame of this utility model; Figure 3 This is a schematic diagram of the internal cross-sectional structure of the transformer body of this utility model; Figure 4 This is a schematic cross-sectional view of the connection between the mounting base and the chassis of this utility model. Figure 5 This is a schematic diagram of the transformer housing structure of this utility model; Figure 6 This is a schematic diagram of the constraint layer damping material structure of this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Base; 2. Transformer body; 3. Transformer casing; 4. Core column; 5. Mounting base; 6. Chassis; 7. Composite vibration damper; 8. Movable slot one; 9. Movable block; 10. Sleeve; 11. Limiting slider; 12. Spring vibration damper; 13. Telescopic column; 14. Movable slot two; 15. Environmentally friendly high-polymer sound-absorbing foam; 16. Mesh-shaped reinforcing ribs; 17. Constraint layer damping material; 18. Viscoelastic damping adhesive; 19. Aluminum foil; 20. Fixing plate; 21. Buffer frame; 22. Buffer spring; 23. Rubber vibration damping pad. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0019] This utility model provides, for example Figure 1-6 The dry-type transformer with a noise reduction structure shown includes a base 1 and a transformer body 2. The base 1 is fixedly installed at the bottom of the transformer body 2. The transformer body 2 includes a transformer shell 3. A core column 4 is fixedly installed inside the transformer shell 3. A mounting seat 5 is fixedly connected to the bottom of the core column 4. A chassis 6 is fixedly connected to the bottom wall inside the transformer shell 3. A composite vibration damper 7 is fixedly connected between the mounting seat 5 and the chassis 6. The number of composite vibration dampers 7 is set to multiple. The longitudinal vibration reduction structure composed of the mounting seat 5, the chassis 6 and the composite vibration dampers 7 can absorb and attenuate the longitudinal micro-vibrations of the winding caused by electromagnetic force and magnetostriction of the core. The inner wall of the chassis 6 has symmetrical movable slots 8 on both sides. Movable blocks 9 are hinged inside movable slots 8. Sleeves 10 are fixedly connected to the side of movable blocks 9. Limiting sliders 11 are slidably installed inside sleeves 10. Spring dampers 12 are fixedly connected between limiting sliders 11 and sleeves 10. A telescopic column 13 that passes through sleeves 10 is fixedly connected to the side of limiting sliders 11 away from spring dampers 12. Movable slots 14 are symmetrically opened on both sides of the mounting base 5. The end of the telescopic column 13 is hinged to the movable slot 14. The transverse vibration damping structure composed of mounting base 5, chassis 6, movable blocks 9, sleeves 10, limiting sliders 11, spring dampers 12 and telescopic columns 13 can absorb and attenuate the small transverse vibrations of the winding caused by electromagnetic force and magnetostriction of the iron core, and block the vibration from being transmitted from the iron core column 4 to the transformer housing 3.

[0020] The positions of movable slot 2 14 and movable slot 1 8 are set to correspond.

[0021] The side wall of the transformer housing 3 is filled with environmentally friendly polymer sound-absorbing foam 15. By filling the cavity inside the transformer housing 3 with porous sound-absorbing material formed by environmentally friendly polymer sound-absorbing foam 15, the reverberation sound in the cavity inside the transformer body 2 can be effectively absorbed, preventing the sound from being amplified after multiple reflections inside the housing.

[0022] The transformer casing 3 includes a grid-like reinforcing rib 16. By using the grid-like reinforcing rib 16 as the main structural design of the transformer body 2 and the matching top cover, the rigidity of the transformer casing 3 is effectively increased. The greater the rigidity, the smaller the vibration amplitude and the lower the radiated noise under the same excitation force.

[0023] The inner wall of the transformer housing 3 is covered with a constraint layer damping material 17, which includes viscoelastic damping adhesive 18 and aluminum foil 19. By attaching the constraint layer damping material 17, which is composed of viscoelastic damping adhesive 18 and aluminum foil 19, to the inner wall of the transformer housing 3, the damping layer will undergo shear deformation when the transformer housing 3 vibrates, converting mechanical energy into heat energy, thereby effectively suppressing vibration. This is a very effective means of housing noise reduction.

[0024] A fixing plate 20 is fixedly installed on both sides and the front and back sides of the base 1. A buffer frame 21 is hinged on the fixing plate 20. A buffer spring 22 is fixedly connected between the buffer frame 21 and the side surface of the base 1.

[0025] A rubber vibration damping pad 23 is fixedly installed on the upper end of the buffer frame 21 near the side of the transformer body 2. The rubber vibration damping pad 23 is tightly attached to the outer surface of the transformer shell 3. By installing the buffer frame 21 on the front side of the transformer shell 3 in multiple directions, a good protective structure can be formed for the outside of the transformer body 2. When an external impact hits the front surface of the transformer body 2, the buffer frame 21 can rotate and deflect within the fixed plate 20. The rubber vibration damping pad 23 is attached to the surface of the transformer shell 3 to reduce the impact force and protect the transformer body 2. The buffer spring 22 can provide auxiliary support to the inner side of the buffer frame 21 to further reduce the impact force, improve the protection performance, reduce the impact damage to the transformer body 2, and improve the protection performance.

[0026] The working principle of this practical application is as follows: The longitudinal vibration damping structure, consisting of mounting base 5, chassis 6, and composite vibration damper 7, can absorb and attenuate the minor longitudinal vibrations of the winding caused by electromagnetic force and magnetostriction of the iron core. The transverse vibration damping structure, consisting of mounting base 5, chassis 6, movable block 9, sleeve 10, limiting slider 11, spring vibration damper 12, and telescopic column 13, can absorb and attenuate the minor transverse vibrations of the winding caused by electromagnetic force and magnetostriction of the iron core, thus blocking the path of vibration transmission from the iron core column 4 to the transformer shell 3. This effectively isolates the transmission of vibration from the iron core column 4 to the chassis 6 and base 1. When an external impact collides with the front surface of the buffer frame 21, the buffer frame 21 can rotate and deflect within the fixed plate 20. The rubber vibration damping pad 23 is attached to the surface of the transformer shell 3 to reduce the impact force and protect the transformer body 2. The buffer spring 22 can provide auxiliary support to the inner side of the buffer frame 21 to further reduce the impact force, improve the protection performance, reduce the impact damage to the transformer body 2, and improve the protection performance.

[0027] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A dry-type transformer with a noise reduction structure, comprising a base (1) and a transformer body (2), characterized in that: The base (1) is fixedly installed at the bottom of the transformer body (2). The transformer body (2) includes a transformer shell (3). An iron core column (4) is fixedly installed inside the transformer shell (3). A mounting base (5) is fixedly connected to the bottom of the iron core column (4). A chassis (6) is fixedly connected to the bottom wall inside the transformer shell (3). A composite vibration damper (7) is fixedly connected between the mounting base (5) and the chassis (6). The number of composite vibration dampers (7) is set to multiple. A movable groove (8) is symmetrically opened on both sides of the inner wall of the chassis (6). A movable block (9) is hinged inside the slot (8). A sleeve (10) is fixedly connected to the side of the movable block (9). A limit slider (11) is slidably provided inside the sleeve (10). A spring damper (12) is fixedly connected between the limit slider (11) and the sleeve (10). A telescopic column (13) that passes through the sleeve (10) is fixedly connected to the side of the limit slider (11) away from the spring damper (12). Movable slots (14) are symmetrically opened on both sides of the mounting base (5). The end of the telescopic column (13) is hinged to the movable slot (14).

2. A dry-type transformer with a noise reduction structure according to claim 1, characterized in that: The positions of the second movable slot (14) and the first movable slot (8) are respectively set.

3. A dry-type transformer with a noise reduction structure according to claim 1, characterized in that: The side wall of the transformer casing (3) is filled with environmentally friendly polymer sound-absorbing foam (15).

4. A dry-type transformer with a noise reduction structure according to claim 3, characterized in that: The transformer casing (3) includes mesh-like reinforcing ribs (16).

5. A dry-type transformer with a noise reduction structure according to claim 4, characterized in that: The inner wall of the transformer housing (3) is covered with a constraint layer damping material (17), which includes viscoelastic damping adhesive (18) and aluminum foil (19).

6. A dry-type transformer with a noise reduction structure according to claim 1, characterized in that: The base (1) is fixedly provided with fixing plates (20) on both sides and front and back sides. A buffer frame (21) is hinged on the fixing plate (20). A buffer spring (22) is fixedly connected between the buffer frame (21) and the side surface of the base (1).

7. A dry-type transformer with a noise reduction structure according to claim 6, characterized in that: A rubber vibration damping pad (23) is fixedly installed on the upper end of the buffer frame (21) near the side of the transformer body (2), and the rubber vibration damping pad (23) is tightly attached to the outer surface of the transformer shell (3).

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