A low-noise dry-type transformer with vibration damping and noise reduction components

Abstract

This invention discloses a low-noise dry-type transformer with vibration damping and noise reduction components, relating to the technical field of low-noise dry-type transformers. The invention includes a sealed mounting box, a silicon steel sheet assembly, a vibration damping and noise reduction component, a winding assembly, a circulating airflow soundproof enclosure, and a heat dissipation component. The sealed mounting box includes a base, a square outer shell, and a top cover. The silicon steel sheet assembly includes a mountain-shaped sheet group and a strip-shaped sheet group. The winding assembly includes a winding cylinder and insulating wrapping cloth. The circulating airflow soundproof enclosure is a cylindrical enclosure consisting of three intersecting cylinders, with a circulating fan at the top of each cylinder to exhaust air into the enclosure. A heat dissipation component is installed on each side wall of the square outer shell. This invention improves heat dissipation by covering the silicon steel sheets with thermally conductive and noise-reducing ceramic components and through reasonable circulating heat dissipation, thus solving problems such as the inability of existing low-noise dry-type transformers to achieve extremely low noise levels, easy dust accumulation during heat dissipation, and the continued increase in noise during heat dissipation.

Description

Technical Field

[0001] This invention belongs to the field of low-noise dry-type transformer technology, and in particular relates to a low-noise dry-type transformer with vibration damping and noise reduction components. Background Technology

[0002] Noise reduction in low-noise dry-type transformers primarily involves using laser-etched high-grade oriented silicon steel, significantly reducing the magnetostriction coefficient. For ultimate quiet operation, an amorphous alloy core can be selected, with magnetostriction far lower than silicon steel, further reducing overall noise by 3-5 dB. The core magnetic flux density is reduced to 1.40-1.50T, preventing magnetic saturation from exacerbating vibrations. When the voltage is too high, the tap changer is adjusted to reduce the magnetic flux density. However, noise reduction is limited and cannot be reduced to extremely low levels. Heat dissipation is also more problematic than in oil-immersed transformers, requiring better ventilation. However, dust accumulation under ventilation can hinder heat dissipation, and the large fans used for ventilation also generate noise, failing to truly eliminate noise. Summary of the Invention

[0003] The purpose of this invention is to provide a low-noise dry-type transformer with vibration damping and noise reduction components. By wrapping the silicon steel sheet with a thermally conductive and noise-reducing ceramic component, it can not only absorb a large amount of noise but also conduct heat. At the same time, the use of a sealed environment can further reduce noise. The heat dissipation effect is improved by reasonable circulation and heat dissipation. This solves the problems of existing low-noise dry-type transformers, such as the inability to achieve extremely low noise reduction, easy dust accumulation during heat dissipation, and the fact that heat dissipation still brings more noise.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: The present invention is a low-noise dry-type transformer with vibration damping and noise reduction components, including a sealed mounting box, a silicon steel sheet assembly, a vibration damping and noise reduction component, a winding assembly, a circulating airflow soundproof cover, and a heat dissipation component; The sealed mounting box includes a base, a square outer shell, and a top cover. The bottom of the square outer shell is fixed to the base, and the top cover is a sealing cover on the top of the square outer shell. A shock-absorbing and heat-absorbing oil box is provided on the upper surface of the base. The silicon steel sheet assembly includes a mountain-shaped sheet group and a strip-shaped sheet group, which are connected by a 45° fully oblique joint. The vibration damping and noise reduction assembly includes two semi-cylindrical silicon carbide ceramic parts. The upper halves of the two semi-cylindrical silicon carbide ceramic parts are interlocked and clamped onto the outside of the mountain-shaped sheet group. The two semi-cylindrical silicon carbide ceramic parts are fastened with bolts and clamp the mountain-shaped sheet group. The bottom of the lower halves of the two semi-cylindrical silicon carbide ceramic parts are inserted into the vibration damping heat absorption oil box. The winding assembly includes a winding cylinder and an insulating wrapping cloth. The winding cylinder is wrapped with the insulating wrapping cloth, and the winding cylinder is sleeved on the outer wall of the upper half of two semi-cylindrical silicon carbide ceramic parts. The circulating airflow soundproof cover is a cylindrical cover consisting of three intersecting cylinders. The circulating airflow soundproof cover is fitted over three winding assemblies. The top plate of the circulating airflow soundproof cover is fixed to the top cover at the four corners by connecting columns. The circulating airflow soundproof cover is provided with a circulating fan at the top of each cylinder to exhaust air into the circulating airflow soundproof cover. A heat dissipation component is installed on each side wall of the square casing.

[0005] The present invention is further configured such that the mountain-shaped piece group includes a first mountain-shaped piece and a second mountain-shaped piece, and the strip-shaped piece group includes a first strip-shaped piece and a second strip-shaped piece. The first mountain-shaped piece and the second mountain-shaped piece are provided with 45° fully oblique joint edges of different lengths at three ends. The first strip-shaped piece and the second strip-shaped piece are respectively connected to the corresponding first mountain-shaped piece and the second mountain-shaped piece at the 45° fully oblique joint edge. The first 45° fully oblique joint is formed by the first mountain-shaped piece and the first strip-shaped piece at the 45° fully oblique joint edge, and the second 45° fully oblique joint is formed by the second mountain-shaped piece and the second strip-shaped piece at the 45° fully oblique joint edge. The first 45° fully oblique joint and the second 45° fully oblique joint are staggered and do not overlap. After the strip-shaped sheet group is joined to the mountain-shaped sheet group, it is fixed with two sets of fixing brackets. The fixing brackets include two symmetrical U-shaped brackets, which are respectively symmetrically fastened to the top of the strip-shaped sheet group and the bottom of the mountain-shaped sheet group and fixed with bolts.

[0006] The present invention is further configured such that the inner wall of the upper half of the semi-cylindrical silicon carbide ceramic part is provided with a T-shaped groove, and the outer wall of the upper half of the semi-cylindrical silicon carbide ceramic part is provided with multiple grooves. After two opposing T-shaped grooves are stacked, they are fastened to the vertical beam and horizontal beam of the mountain-shaped plate assembly. Insulating thermally conductive silicone is applied to the T-shaped groove of the semi-cylindrical silicon carbide ceramic part, and the thermally conductive silicone will fill the gap between the inner wall of the T-shaped groove and the outer wall of the mountain-shaped plate assembly. The semi-cylindrical silicon carbide ceramic component has a joint strip on the top. The two joint strips on each set of semi-cylindrical silicon carbide ceramic components just cover the overlapping position of a first 45° fully oblique joint and a second 45° fully oblique joint.

[0007] The present invention is further configured such that the cover of the shock-absorbing heat-absorbing oil box is provided with three recessed circular grooves, the bottom of the three circular grooves touches the bottom of the shock-absorbing heat-absorbing oil box, the shock-absorbing heat-absorbing oil box is filled with heat-conducting oil, and the cover is sealed on the shock-absorbing heat-absorbing oil box. The lid of the shock-absorbing and heat-absorbing oil box is first placed in an oven at 100-150℃ to expand it. Thermally conductive silicone is then applied to the inner wall of the circular groove. Immediately afterward, the bottom of the already fastened semi-cylindrical silicon carbide ceramic part is inserted into the circular groove.

[0008] The present invention is further configured such that the circulating airflow soundproof cover is made of ceramic material and has a honeycomb structure. The distance between the top of the circulating airflow soundproof cover and the top of the strip-shaped plate group is 20-30cm, the bottom of the circulating airflow soundproof cover is 20-30cm lower than the bottom of the mountain-shaped plate group, and the distance between the bottom of the circulating airflow soundproof cover and the top of the shock-absorbing heat-absorbing oil box is 10-15cm.

[0009] The present invention is further configured such that an electronic thermometer is provided on the corner wall of the square outer shell inside the sealed mounting box; The operating power of the three circulating fans is adjusted by monitoring the temperature using the electronic thermometer.

[0010] The present invention is further configured such that the minimum distance between the inner wall of the square outer shell and the outer wall of the circulating airflow soundproof cover is at least 15cm; The sealed mounting box is filled with 20% SF6 and 80% N2.

[0011] The present invention is further configured such that a square opening is formed on each of the four side walls of the square housing, and the heat dissipation component is installed on the square opening; The heat dissipation assembly includes a heat-conducting plate and a heat-conducting oil box. The heat-conducting oil box has an opening on one side wall, and the opening side is fastened to the heat-conducting plate. The contact position between the heat-conducting plate and the heat-conducting oil box is welded and sealed. Multiple first heat dissipation strips are provided on the outer wall of the heat-conducting oil box opposite to the opening. Multiple second heat dissipation strips are provided on the outer wall of the heat-conducting plate. The heat-conducting oil box is filled with heat-conducting oil. The heat-conducting oil box fits perfectly into the square opening. The heat-conducting plate is attached to the outer wall of the square shell and fixed and sealed. The base has a silent fan around the perimeter of the outer area of ​​the square shell, and the fans are evenly spaced and facing upwards on each side of the base.

[0012] The present invention is further configured such that the mountain-shaped sheet group in the silicon steel sheet assembly can be replaced with the U-shaped sheet group, and the winding assembly is changed from three to two.

[0013] The present invention has the following beneficial effects: 1. This invention uses two semi-cylindrical silicon carbide ceramic parts fitted onto the mountain-shaped sheet group (on the three vertical beams) at the core column position of the winding. The noise is greatest at the core column position of the mountain-shaped sheet group, but after being fitted, not only is the core column reinforced to reduce the vibration of the silicon steel sheet at this position, but the noise is also absorbed by the semi-cylindrical silicon carbide ceramic parts, while the heat is absorbed by the semi-cylindrical silicon carbide ceramic parts and transferred downwards. Combined with the external circulating airflow soundproof cover, the noise is further isolated from spreading to the surroundings. Finally, by setting up a sealed mounting box, the noise generated inside is basically unable to be transmitted outside the sealed mounting box, achieving an extremely low noise effect.

[0014] 2. This invention achieves heat dissipation by circulating the gas within the sealed mounting box. A circulating fan exhausts gas into a circulating airflow soundproof cover. The gas flows downwards within the cover, carrying away heat. The airflow exits from the bottom of the cover and flows upwards along the four side walls of the square outer shell. As hot air passes through each heat dissipation component, the heat is absorbed and conducted to the outside. The exterior of the heat dissipation components has excellent airflow, which carries away heat from the components, thus achieving heat exhaust. This ensures a sealed mounting box and prevents dust accumulation on the windings and silicon steel sheets, achieving excellent heat dissipation without dust accumulation.

[0015] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a low-noise dry-type transformer with vibration damping and noise reduction components.

[0018] Figure 2 A schematic diagram of a low-noise dry-type transformer with vibration damping and noise reduction components, showing the removal of its square outer casing.

[0019] Figure 3 This is a structural diagram of the internal transformer location.

[0020] Figure 4 This is a schematic diagram of the exploded structure at the internal pressure transformer location.

[0021] Figure 5 This is a schematic diagram of the structure of a semi-cylindrical silicon carbide ceramic component.

[0022] Figure 6 This is a schematic diagram of a circulating airflow soundproof enclosure.

[0023] Figure 7 This is a schematic diagram of the box lid.

[0024] Figure 8 This is a schematic diagram of the heat dissipation component.

[0025] The attached diagram lists the components represented by each number as follows: 1. Square outer shell; 2. Base; 20. Silent fan; 21. Shock-absorbing heat-absorbing oil box; 22. Box cover; 221. Circular groove; 3. Top cover; 4. Heat dissipation assembly; 41. Heat-conducting plate; 411. Second heat dissipation strip; 42. Heat-conducting oil box; 421. First heat dissipation strip; 5. Circulating airflow soundproof cover; 50. Circulating fan; 51. Top plate; 511. Connecting column; 6. Silicon steel sheet assembly; 60. Fixing frame; 61. Mountain-shaped sheet group; 62. Strip sheet group; 7. Semi-cylindrical silicon carbide ceramic part; 70. Seam strip; 71. T-shaped slot; 72. Strip groove; 8. Winding assembly; 81. Winding assembly cylinder; 82. Insulating wrapping cloth. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figures 1-8 The present invention is a low-noise dry-type transformer with shock absorption and noise reduction components, including a sealed mounting box, a silicon steel sheet assembly 6, a shock absorption and noise reduction component, a winding assembly 8, a circulating airflow soundproof cover 5, and a heat dissipation component 4. The sealed mounting box includes a base 2, a square outer shell 1 and a top cover 3. The bottom of the square outer shell 1 is fixed on the base 2, and the top cover 3 seals the top of the square outer shell 1. The upper surface of the base 2 is provided with a shock-absorbing heat-absorbing oil box 21. The sealed mounting box seals the transformer part inside. The shock-absorbing and heat-absorbing oil box 21 is mainly used to install the bottom of the shock-absorbing and noise-reducing components and absorb the heat on the shock-absorbing and noise-reducing components. The shock-absorbing and noise-reducing components also play a supporting role.

[0028] The silicon steel sheet assembly 6 includes a mountain-shaped sheet group 61 and a strip-shaped sheet group 62, which are joined together at a 45° angle. The vibration damping and noise reduction assembly includes two semi-cylindrical silicon carbide ceramic parts 7. The upper half of the two semi-cylindrical silicon carbide ceramic parts 7 are fastened and clipped onto the mountain-shaped sheet group 61. The two semi-cylindrical silicon carbide ceramic parts 7 are fastened and clamped onto the mountain-shaped sheet group 61 with bolts. The bottom of the lower half of the two semi-cylindrical silicon carbide ceramic parts 7 is inserted into the vibration damping heat absorption oil box 21. Because windings (sleeve-type windings) need to be installed, the silicon steel sheets need to be designed in two ways: first, two sets of interlocking mountain-shaped sheet groups 61 are stacked one by one and fixed with thin ropes. When it is necessary to install a semi-cylindrical silicon carbide ceramic component 7 on the vertical beam of a certain mountain-shaped sheet group 61 (one of the three parallel vertical sheet groups), the binding rope at that position is untied, and two semi-cylindrical silicon carbide ceramic components 7 are fastened to the vertical beam of the mountain-shaped sheet group 61 to clamp them, and then fixed with bolts (e.g., ...). Figure 3 and Figure 4 Untie the ropes one by one to complete the fixed installation of the three sets of semi-cylindrical silicon carbide ceramic parts 7. After the installation is completed, insert the strip-shaped piece group 62 one by one into the top position of the mountain-shaped piece group 61 to complete the docking.

[0029] The winding assembly 8 includes a winding cylinder 81 and an insulating wrapping cloth 82. The winding cylinder 81 is wrapped with the insulating wrapping cloth 82, and the winding cylinder 81 is fitted onto the outer wall of the upper half of the two semi-cylindrical silicon carbide ceramic parts 7. The winding assembly 81 is a ceramic tube or other insulating material tube. The winding is wound on the tube, and then the winding wire is wrapped with insulating cloth. After the two semi-cylindrical silicon carbide ceramic parts 7 are installed, the winding assembly 81 fits just outside the semi-cylindrical silicon carbide ceramic parts 7 (or is slightly larger, and the gap is filled with a stopper or other material).

[0030] The circulating airflow soundproof cover 5 is a cylindrical cover with three intersecting cylinders. The circulating airflow soundproof cover 5 is fitted over three winding assemblies 8. The top plate 51 of the top of the circulating airflow soundproof cover 5 is fixed to the top cover 3 at the four corners by connecting columns 511. The circulating airflow soundproof cover 5 is provided with a circulating fan 50 at the top of each cylinder to exhaust air into the circulating airflow soundproof cover 5. A heat dissipation component 4 is installed on each side wall of the square outer casing 1.

[0031] The inner wall of the circulating airflow soundproof cover 5 does not contact the winding assembly 81. When the circulating fan 50 exhausts gas into the circulating airflow soundproof cover 5, the gas will flow downward inside the circulating airflow soundproof cover 5, carrying away the heat generated by the winding assembly 81 and the silicon steel sheet assembly 6, and can also block the transmission of noise to a certain extent.

[0032] The semi-cylindrical silicon carbide ceramic component 7 is located at the core of the winding, where the noise is greatest. However, after being wrapped by the semi-cylindrical silicon carbide ceramic component 7, the vibration of the silicon steel sheet is reduced, and the noise is largely blocked and absorbed by the semi-cylindrical silicon carbide ceramic component 7.

[0033] The iron core is also the location where the most heat is generated. However, after being wrapped by the semi-cylindrical silicon carbide ceramic part 7, the heat will be absorbed by the semi-cylindrical silicon carbide ceramic part 7 and transferred downwards, and absorbed by the shock-absorbing heat-absorbing oil box 21. The heat-conducting oil in the shock-absorbing heat-absorbing oil box 21 can reduce vibration.

[0034] Hot air circulates within the sealed mounting box and is absorbed by the heat dissipation component 4. The heat inside the heat dissipation component 4 is dissipated to the outside by radiating heat outwards.

[0035] The mountain-shaped piece group 61 includes a first mountain-shaped piece and a second mountain-shaped piece, and the strip-shaped piece group 62 includes a first strip-shaped piece and a second strip-shaped piece. The first mountain-shaped piece and the second mountain-shaped piece are provided with 45° fully oblique joint edges of different lengths at three ends. The first strip-shaped piece and the second strip-shaped piece are respectively connected to the corresponding first mountain-shaped piece and the second mountain-shaped piece at the 45° fully oblique joint edge. The first 45° fully oblique joint is formed by the first mountain-shaped piece and the first strip-shaped piece at the 45° fully oblique joint edge, and the second 45° fully oblique joint is formed by the second mountain-shaped piece and the second strip-shaped piece at the 45° fully oblique joint edge. The first 45° fully oblique joint and the second 45° fully oblique joint are staggered and do not overlap. After the strip group 62 is mated onto the mountain-shaped group 61, it is fixed by two sets of fixing brackets 60. The fixing brackets 60 include two symmetrical U-shaped brackets. The two U-shaped brackets are respectively symmetrically fastened to the top of the strip group 62 and the bottom of the mountain-shaped group 61 and fixed with bolts.

[0036] The first and second beveled pieces have different lengths of their hypotenuses at the 45° full bevel joint. After the first and second beveled pieces are overlapped sequentially, their 45° full bevel joints do not overlap (misalignment exists). When the first and second striped pieces are aligned and joined, the resulting first and second 45° full bevel joints are also misaligned and do not overlap. This ensures magnetic conductivity and prevents the formation of a crack (no overlapping joint).

[0037] The upper half of the semi-cylindrical silicon carbide ceramic part 7 has a T-shaped groove 71 on its inner side wall, and the upper half of the semi-cylindrical silicon carbide ceramic part has multiple grooves 72 on its outer side wall. Two opposing T-shaped grooves 71 are stacked and fastened to the vertical and horizontal beams of the mountain-shaped plate assembly. Insulating thermally conductive silicone is applied to the T-shaped grooves 71 of the semi-cylindrical silicon carbide ceramic part, and the thermally conductive silicone will fill the gap between the inner wall of the T-shaped groove 71 and the outer wall of the mountain-shaped plate assembly. After the first and second mountain-shaped pieces overlap, they form an L-shape and an inverted T-shape in the three installation positions. Therefore, the T-shaped slot 71 can accommodate the fastening and fixing in the three positions, such as... Figure 4 The semi-cylindrical silicon carbide ceramic component 7 has bolt holes for fastening the two semi-cylindrical silicon carbide ceramic components 7. Thermally conductive silicone is used to fill the gaps to improve the heat absorption capacity of the semi-cylindrical silicon carbide ceramic component 7.

[0038] like Figure 3 and Figure 5The multiple grooves 72 allow for ventilation. When the circulating fan 50 blows air downwards, the flowing air will flow through the grooves 72, accelerating the heat dissipation of the semi-cylindrical silicon carbide ceramic part 7. The hot air will then rush downwards and be discharged from below the circulating airflow soundproof cover 5.

[0039] The semi-cylindrical silicon carbide ceramic component 7 is provided with a joint pressure strip 70 at the top. The two joint pressure strips 70 on each set of semi-cylindrical silicon carbide ceramic components 7 just press against the overlapping position of a first 45° fully oblique joint and a second 45° fully oblique joint.

[0040] The seam sealing strip 70 presses down on the 45° fully oblique seam position to prevent the first strip and the second strip from expanding outward when they are joined. Then, the fixing frame 60 is used to press and fix them. Since the fixing frame 60 is a U-shaped frame, it can limit the position of the first strip and the second strip to prevent them from moving outward (expanding outward, so as to ensure good joining).

[0041] The cover 22 of the shock-absorbing heat-absorbing oil box 21 is provided with three recessed circular grooves 221. The bottom of the three circular grooves 221 touches the bottom of the shock-absorbing heat-absorbing oil box 21. The shock-absorbing heat-absorbing oil box 21 is filled with heat-conducting oil. The cover 22 seals the shock-absorbing heat-absorbing oil box 21. The lid 22 of the shock-absorbing and heat-absorbing oil box 21 is first placed in an oven at 100-150℃ to be heated and expanded. Thermally conductive silicone is applied to the inner wall of the circular groove 221. The bottom of the semi-cylindrical silicon carbide ceramic part 7, which has already been fastened, is then inserted into the circular groove 221.

[0042] After the semi-cylindrical silicon carbide ceramic part 7 is fastened, the bottom is cylindrical. The lid 22 is placed on it after heating and can be securely fitted after cooling. Thermally conductive silicone can fill the gap between the semi-cylindrical silicon carbide ceramic part 7 and the inner wall of the circular groove 221, thereby improving thermal conductivity.

[0043] The bottom of the circular groove 221 touches the bottom of the shock-absorbing heat-absorbing oil box 21 to ensure the support effect.

[0044] The circulating airflow soundproof cover 5 is made of ceramic material and has a honeycomb structure. The distance between the top of the circulating airflow soundproof cover 5 and the top of the strip-shaped plate group 62 is 20-30cm. The bottom of the circulating airflow soundproof cover 5 is 20-30cm lower than the bottom of the mountain-shaped plate group 61. The distance between the bottom of the circulating airflow soundproof cover 5 and the top of the shock-absorbing heat-absorbing oil box 21 is 10-15cm.

[0045] The circulating airflow soundproof cover 5 blocks the airflow between the inside and outside and can also absorb sound. It is necessary to ensure that the winding position where noise is generated is completely covered.

[0046] An electronic thermometer is provided on the corner wall of the square housing 1 inside the sealed mounting box; The working power of the three circulation fans 50 is adjusted by monitoring the temperature through the electronic thermometer.

[0047] By monitoring the internal temperature, the gas circulation speed is increased, thereby improving the heat exchange efficiency.

[0048] The minimum distance between the inner wall of the square housing 1 and the outer wall of the circulation air flow type sound insulation cover 5 is at least more than 15 cm; The sealed mounting box is filled with 20% SF6 and 80% N2. The filling of inert gas can reduce the generation of electric arcs and can also maintain the performance of the winding and silicon steel sheets for a long time.

[0049] A square opening is provided on each of the four side walls of the square housing 1, and the heat dissipation component 4 is installed on the square opening; The heat dissipation component 4 includes a heat conduction plate 41 and a heat conduction oil box 42. One side wall of the heat conduction oil box 42 is open, and the open side is buckled on the heat conduction plate 41. The contact position between the heat conduction plate 41 and the heat conduction oil box 42 is welded and sealed. A plurality of first heat dissipation strips 421 are provided on the outer wall of the heat conduction oil box 42 on the side opposite to the opening, and a plurality of second heat dissipation strips 411 are provided on the outer side wall of the heat conduction plate 41. The heat conduction oil box 42 is filled with heat conduction oil. The heat conduction oil box 42 just fits in the square opening, and the heat conduction plate 41 is attached to the outer wall of the square housing and fixed and sealed; The base 2 is provided with silent fans 20 around the outer area of the square housing 1, and they are arranged upward at equal intervals at each side position of the base 2.

[0050] The first heat dissipation strips 421 mainly absorb the heat of the internal flowing gas, and the heat conduction oil box 42 can store a certain amount of heat to ensure its heat absorption capacity. The external second heat dissipation strips 411 are blown by the silent fans 20, and the flowing air can quickly take away the heat on the surfaces of the second heat dissipation strips 411 and the heat conduction plate 41, so as to cool the heat conduction oil, and thus form a cycle of conducting heat outward.

[0051] In the silicon steel sheet assembly 6, the mountain-shaped sheet group 61 can be replaced with a U-shaped sheet group, and the winding assembly 8 changes from three to two. The mountain-shaped sheet group 61 is mainly a three-phase transformer, and the U-shaped sheet group is a two-phase transformer, which can be changed according to needs, and other structural designs and principles are the same.

[0052] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A low-noise dry-type transformer with vibration damping and noise reduction components, characterized in that: It includes a sealed mounting box, a silicon steel sheet assembly (6), a shock absorption and noise reduction assembly, a winding assembly (8), a circulating airflow soundproof cover (5), and a heat dissipation assembly (4). The sealed mounting box includes a base (2), a square outer shell (1) and a top cover (3). The bottom of the square outer shell (1) is fixed on the base (2), and the top cover (3) seals the top of the square outer shell (1). The upper surface of the base (2) is provided with a shock-absorbing heat-absorbing oil box (21). The silicon steel sheet assembly (6) includes a mountain-shaped sheet group (61) and a strip-shaped sheet group (62), which are connected by a 45° full oblique joint; the vibration damping and noise reduction assembly includes two semi-cylindrical silicon carbide ceramic parts (7), the upper halves of the two semi-cylindrical silicon carbide ceramic parts (7) are interlocked and clamped on the outside of the mountain-shaped sheet group (61), and the two semi-cylindrical silicon carbide ceramic parts (7) are fastened and clamped to the mountain-shaped sheet group (61) with bolts, and the bottom of the lower halves of the two semi-cylindrical silicon carbide ceramic parts (7) are inserted into the vibration damping heat absorption oil box; The winding assembly (8) includes a winding cylinder (81) and an insulating wrap (82). The winding cylinder (81) is wrapped with the insulating wrap (82). The winding cylinder (81) is fitted onto the outer wall of the upper half of the two semi-cylindrical silicon carbide ceramic parts (7). The circulating airflow soundproof cover (5) is a cylindrical cover consisting of three intersecting cylinders. The circulating airflow soundproof cover (5) is fitted over three winding assemblies (8). The top plate (51) of the top of the circulating airflow soundproof cover (5) is fixed to the top cover (3) at the four corners by connecting columns (511). The circulating airflow soundproof cover (5) has a circulating fan (50) at the top of each cylinder to exhaust air into the circulating airflow soundproof cover (5). A heat dissipation assembly (4) is installed on each side wall of the square housing (1).

2. A low-noise dry-type transformer with vibration damping and noise reduction components according to claim 1, characterized in that, The mountain-shaped piece group (61) includes a first mountain-shaped piece and a second mountain-shaped piece, and the strip-shaped piece group (62) includes a first strip-shaped piece and a second strip-shaped piece. The first mountain-shaped piece and the second mountain-shaped piece are provided with 45° full oblique joint edges of different lengths at three ends. The first strip-shaped piece and the second strip-shaped piece are respectively connected to the corresponding first mountain-shaped piece and the second mountain-shaped piece at the 45° full oblique joint edge. The first mountain-shaped piece and the first strip-shaped piece are joined at the 45° full oblique joint edge to form a first 45° full oblique joint. The second mountain-shaped piece and the second strip-shaped piece are joined at the 45° full oblique joint edge to form a second 45° full oblique joint. The first 45° full oblique joint and the second 45° full oblique joint are staggered and do not overlap. After the strip group (62) is connected to the mountain-shaped group (61), it is fixed with two sets of fixing brackets (60). The fixing brackets (60) include two symmetrical U-shaped brackets. The two U-shaped brackets are respectively symmetrically fastened to the top of the strip group (62) and the bottom of the mountain-shaped group (61) and fixed with bolts.

3. A low-noise dry-type transformer with vibration damping and noise reduction components according to claim 2, characterized in that, The upper half of the semi-cylindrical silicon carbide ceramic part (7) is provided with a T-shaped groove (71) on the inner side wall, and the upper half of the semi-cylindrical silicon carbide ceramic part is provided with multiple grooves (72). The two opposing T-shaped grooves (71) are stacked and fastened to the vertical beam and horizontal beam of the mountain-shaped plate group. The T-shaped groove (71) of the semi-cylindrical silicon carbide ceramic part is coated with insulating thermally conductive silicone. The thermally conductive silicone will fill the gap between the inner wall of the T-shaped groove (71) and the outer wall of the mountain-shaped plate group. The semi-cylindrical silicon carbide ceramic part (7) is provided with a joint strip (70) at the top. The two joint strips (70) on each set of the semi-cylindrical silicon carbide ceramic parts (7) just press against the overlapping position of a first 45° full oblique joint and a second 45° full oblique joint.

4. A low-noise dry-type transformer with vibration damping and noise reduction components according to claim 1, characterized in that, The cover (22) of the shock-absorbing heat-absorbing oil box (21) is provided with three recessed circular grooves (221), the bottom of the three circular grooves (221) touches the bottom of the shock-absorbing heat-absorbing oil box (21), the shock-absorbing heat-absorbing oil box (21) is filled with heat-conducting oil, and the cover (22) seals the shock-absorbing heat-absorbing oil box (21). The lid (22) of the shock-absorbing heat-absorbing oil box (21) is first placed in an oven at 100-150℃ to be heated and expanded. Thermally conductive silicone is applied to the inner wall of the circular groove (221). The bottom of the semi-cylindrical silicon carbide ceramic part (7) that has been fastened is immediately inserted into the circular groove (221).

5. A low-noise dry-type transformer with vibration damping and noise reduction components according to claim 1, characterized in that, The circulating airflow soundproof cover (5) is made of ceramic material and has a honeycomb structure. The distance between the top of the circulating airflow soundproof cover (5) and the top of the strip group (62) is 20-30cm. The bottom of the circulating airflow soundproof cover (5) is 20-30cm lower than the bottom of the mountain-shaped group (61). The distance between the bottom of the circulating airflow soundproof cover (5) and the top of the shock-absorbing heat-absorbing oil box (21) is 10-15cm.

6. A low-noise dry-type transformer with vibration damping and noise reduction components according to claim 1, characterized in that, An electronic thermometer is installed on the corner wall of the square outer shell (1) inside the sealed mounting box; The operating power of the three circulating fans (50) is adjusted by monitoring the temperature using the electronic thermometer.

7. A low-noise dry-type transformer with vibration damping and noise reduction components according to claim 6, characterized in that, The minimum distance between the inner wall of the square outer shell (1) and the outer wall of the circulating airflow soundproof cover (5) is at least 15cm; The sealed mounting box is filled with 20% SF6 and 80% N2.

8. A low-noise dry-type transformer with vibration damping and noise reduction components according to claim 1, characterized in that, The square outer shell (1) has a square opening on each of its four side walls, and the heat dissipation component (4) is installed on the square opening; The heat dissipation assembly (4) includes a heat-conducting plate (41) and a heat-conducting oil box (42). The heat-conducting oil box (42) has an opening on one side wall and the opening side is fastened to the heat-conducting plate (41). The contact position between the heat-conducting plate (41) and the heat-conducting oil box (42) is welded and sealed. Multiple first heat dissipation strips (421) are provided on the outer wall of the heat-conducting oil box (42) opposite to the opening. Multiple second heat dissipation strips (411) are provided on the outer wall of the heat-conducting plate (41). The heat-conducting oil box (42) is filled with heat-conducting oil. The heat-conducting oil box (42) fits perfectly into the square opening. The heat-conducting plate (41) is attached to the outer wall of the square outer shell (1) and fixed and sealed. The base (2) has a silent fan (20) around the perimeter of the outer area of ​​the square shell (1), and the fan is equally spaced and facing upwards at each side of the base (2).

9. A low-noise dry-type transformer with vibration damping and noise reduction components according to claim 8, characterized in that, The mountain-shaped sheet group (61) in the silicon steel sheet assembly (6) can be replaced with the U-shaped sheet group, and the winding assembly (8) is changed from three to two.

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