Damping type three-phase reactor

Abstract

The damping type three-phase electric reactor comprises an electric reactor body, the electric reactor body comprises an iron core formed by stacking a plurality of silicon steel sheets and a coil wound on the iron core, the top face and the bottom face of the iron core are each provided with an installation cavity sunken towards the middle of the iron core, and the coil is located between the two installation cavities. A pressed jacking piece is arranged in the mounting cavity, and when the jacking piece is pressed, the pressure can reversely act on the iron core so as to reduce the gap between the silicon steel sheets. The magnetostrictive vibration of the silicon steel sheet can be effectively reduced, and then noise is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of reactors, and in particular to a damping type three-phase reactor. Background Art

[0002] The reactor is also called the inductor coil. The reactor is basically composed of a coil, an iron core, etc. The iron core is made of several stacked silicon steel sheets.

[0003] In existing technology, brackets are simply installed at the top and bottom of the core. These brackets are connected by bolts to secure the core vertically. When the silicon steel sheets are not tightly fitted together, tiny gaps will exist between the sheets. During reactor operation, the silicon steel sheets in the core undergo magnetostriction in the alternating magnetic field. This means that the sheets periodically expand and contract as the magnetic field changes. The vibrations generated by this magnetostriction are hindered and disrupted by the gaps. This prevents the vibration energy from being effectively transmitted and dissipated. Instead, it reflects and accumulates between the sheets, amplifying the magnetostrictive vibrations and increasing noise. Summary of the Invention

[0004] The object of the present invention is to provide a vibration-damping three-phase reactor, which can effectively reduce the magnetostrictive vibration of silicon steel sheets and thus reduce noise.

[0005] In order to solve the above technical problems, the present invention adopts the following solutions: A damping three-phase inductor includes a reactor body, the reactor body including an iron core formed by stacking a plurality of silicon steel sheets and a coil wound on the iron core. The top and bottom surfaces of the iron core are both provided with mounting cavities recessed toward the center of the iron core. The coil is located between the two mounting cavities. A pressurized top pressure piece is provided in the mounting cavity. When the pressurized top pressure piece is subjected to pressure, it can apply pressure in the opposite direction to the iron core to reduce the gap between the silicon steel sheets.

[0006] In this solution, the main source of noise in the reactor is that the gap between the silicon steel sheets causes the core to vibrate through mechanisms such as magnetic resistance changes, magnetic attraction, and magnetostrictive effect, thereby generating noise. The larger the gap, the more obvious the magnetic resistance inhomogeneity, and the stronger the vibration and noise.

[0007] The reactor of the present invention is provided with mounting cavities on the top and bottom surfaces of the iron core, and with a pressure piece therein. The pressure piece is initially under pressure. The pressure mainly comes from the extrusion of the iron core by the wire wrapping and the fact that the size of the pressure piece itself is slightly smaller than the width of the mounting cavity. After the pressure piece is installed, it is squeezed by the iron cores on both sides, so that the pressure piece applies reverse pressure to the iron core, thereby reducing the gap between the silicon steel sheets. This design directly addresses the gap problem and reduces the magnetic resistance unevenness by reducing the gap, reducing the vibration caused by the electromagnetic force and magnetostrictive force, and thus reducing the noise. When the pressure piece is under pressure, it transfers the pressure evenly to the iron core, compressing the gap between the silicon steel sheets. This pressure transmission method ensures that all parts of the iron core are evenly stressed and avoids local stress concentration. Through the pressure of the pressure piece, the gap between the silicon steel sheets is effectively reduced, thereby improving the magnetic flux density distribution and reducing the vibration caused by the electromagnetic force and magnetostrictive force. The mounting cavity is provided on the top and bottom surfaces of the iron core, does not take up additional space, and is convenient for the installation and maintenance of the pressure piece.

[0008] Optionally, the pressing member is a corrugated stainless steel plate with a wavy cross section. The width of both sides of the stainless steel plate is greater than the width of the installation cavity, and both sides of the stainless steel plate respectively contact the inner walls opposite to the installation cavity.

[0009] Optionally, a plurality of first heat dissipation channels for dissipating heat from the middle of the iron core are formed between the side surface of the stainless steel plate and the inner wall of the installation cavity.

[0010] Optionally, the cross section of the first heat dissipation channel is triangular.

[0011] Optionally, the stainless steel plate is pressed from 304 stainless steel and has a thickness of 0.5-1 mm.

[0012] Optionally, the coil package is composed of multiple layers of coils, and elastic spacers are provided between each layer of coils, so that the elastic spacers form a second heat dissipation channel between two adjacent layers of coils.

[0013] Optionally, the cross-section of the elastic isolation piece is I-shaped, and the elastic isolation piece is a rubber strip.

[0014] Optionally, each layer of coil is formed by winding a plurality of turns of glass fiber covered wire.

[0015] Optionally, a locking device is also included, which includes an upper bracket and a lower bracket. The upper bracket is arranged on both sides of the upper end of the iron core, and the lower bracket is arranged on both sides of the lower end of the iron core. The two upper brackets on both sides of the upper end are connected by a first bolt, and the two lower brackets on both sides of the lower end are connected by a first bolt. A base is provided on the bottom surface of the lower bracket, and a waist-shaped mounting hole is provided on the base. The sides of the upper bracket and the lower bracket are provided with outward-protruding fixing seats, and the fixing seat at the upper end and the fixing seat at the lower end are connected by a second bolt.

[0016] Optionally, a pressing plate is provided on the top of the upper bracket, a wiring block is provided on the pressing plate, an insulating seat is provided between the wiring block and the pressing plate, and a lifting lug is also provided on the upper pressing plate.

[0017] The present invention has the beneficial effects: 1. In the present invention, after the top pressure piece is installed, it is squeezed by the iron cores on both sides, so that the top pressure piece applies reverse pressure to the iron cores, thereby reducing the gap between the silicon steel sheets. By reducing the gap, the magnetic resistance non-uniformity is reduced, the vibration caused by the electromagnetic force and magnetostrictive force is reduced, and the noise is reduced.

[0018] 2. When the pressure piece is under pressure, it evenly transfers the pressure to the core, compressing the gaps between the silicon steel sheets. This pressure transfer ensures uniform force across the core and avoids localized stress concentration. The pressure of the pressure piece effectively reduces the gaps between the silicon steel sheets, thereby improving the magnetic flux density distribution and reducing vibration caused by electromagnetic and magnetostrictive forces. Mounting cavities are located on the top and bottom surfaces of the core, eliminating the need for additional space and facilitating installation and maintenance of the pressure piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 Schematic diagram of the bottom structure of the present invention; Figure 3 Schematic diagram of the structure of corrugated stainless steel plate.

[0020] Figure markings: 1-iron core, 2-installation cavity, 3-top pressure piece, 301-stainless steel plate, 4-first heat dissipation channel, 5-wire package, 6-coil, 7-elastic isolation piece, 8-second heat dissipation channel, 9-upper bracket, 10-first bolt, 11-second bolt, 12-fixing seat, 13-waist-shaped mounting hole, 14-base, 15-insulating layer, 16-lower bracket, 17-pressure plate, 18-terminal block, 19-lifting ear, 20-insulating seat. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0022] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0023] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "having," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts. Example

[0024] A damping three-phase reactor includes a reactor body, the reactor body including an iron core 1 formed by stacking a plurality of silicon steel sheets and a coil 5 wound on the iron core 1. The top and bottom surfaces of the iron core 1 are both provided with mounting cavities 2 recessed toward the center of the iron core 1. The coil 5 is located between the two mounting cavities 2. A pressurized top pressure piece 3 is provided in the mounting cavity 2. When pressurized, the top pressure piece 3 can apply pressure in the opposite direction to the iron core 1 to reduce the gap between the silicon steel sheets.

[0025] In this embodiment, the outer surface of the core 1 in the conventional reactor is provided with an insulating layer 15, typically coated with insulating varnish. Insulating plates (not shown) are also provided at the upper and lower ends of the coil 5, adjacent to the core 1. The primary source of noise in the reactor is the gaps between the silicon steel sheets, which, through mechanisms such as magnetic resistance changes, magnetic attraction, and magnetostriction, induce vibrations in the core 1, generating noise. The larger the gaps, the more pronounced the magnetic resistance nonuniformity, resulting in greater vibration and noise.

[0026] In this embodiment, Figure 1 and Figure 2As shown, the iron core 1 has three core columns on the left, middle and right sides (the core columns are located in the coil 5, not shown in the figure), and there are three coils 5 in total. The inductor is configured by setting mounting cavities 2 on the top and bottom surfaces of the iron core 1, and arranging pressure pieces 3 therein. The pressure pieces 3 are initially under pressure, and the pressure mainly comes from the squeezing of the iron core 1 by the winding of the coil 5. This squeezing is mainly generated during the manufacturing process of the reactor, or the size of the pressure piece 3 itself is slightly larger than the width of the mounting cavity 2. This is used to install the pressure piece 3 after the reactor is manufactured. The pressure piece 3 is squeezed by the iron cores 1 on both sides, mainly by radial pressure, so that the pressure piece 3 applies reverse pressure to the iron core 1, thereby reducing the gap between the silicon steel sheets. This design directly addresses the gap problem, reduces the magnetic resistance non-uniformity by reducing the gap, reduces the vibration caused by the electromagnetic force and magnetostrictive force, and thus reduces the noise. When the top pressure piece 3 is under pressure, the pressure is evenly transferred to the iron core 1, so that the gaps between the silicon steel sheets are compressed. This pressure transfer method ensures that all parts of the iron core 1 are evenly stressed and avoids local stress concentration.

[0027] The pressure of the top pressure piece 3 effectively reduces the gaps between the silicon steel sheets, thereby improving the magnetic flux density distribution and reducing vibration caused by electromagnetic and magnetostrictive forces. The installation cavity 2 is located on the top and bottom surfaces of the core 1, eliminating the need for additional space and facilitating the installation and maintenance of the top pressure piece 3.

[0028] Furthermore, the top pressure member 3 is a corrugated stainless steel plate 301 with a wavy cross section. The width of both sides of the stainless steel plate 301 is greater than the width of the installation cavity 2 , and both sides of the stainless steel plate 301 respectively contact the inner walls opposite to the installation cavity 2 .

[0029] Specifically, such as Figure 1 and Figure 3 As shown, the width of the stainless steel plate 301 on both sides is slightly larger than the width of the installation cavity 2 (interference design). During installation, external force is applied to the wavy structure to produce elastic compression. This deformation creates a continuous preload inside the core 1 (similar to the reaction force after spring compression), ensuring that the gaps between the silicon steel sheets are always under pressure. The periodic fluctuations of the wavy structure evenly distribute the pressure along the axial direction of the core 1, avoiding local stress concentration. For example, if the wavy period is 50mm, the pressure distribution curve within each 50mm length will show periodic fluctuations, but the overall mean value remains stable. The typical elastic modulus of 304 stainless steel is approximately 193 GPa. Combined with the wavy structure, it can achieve a balance between high rigidity and flexibility. When subjected to a preload of 10MPa, the compression of a single layer of wavy plate can be controlled within the range of 0.1-0.3mm, ensuring the gap reduction effect while avoiding material yield.

[0030] Vibration Suppression Mechanism: Pre-stressing reduces the gap between the silicon steel sheets from an initial 0.05-0.1mm to 0.01-0.03mm, improving magnetic resistance uniformity by over 30%. According to Maxwell's stress tensor theory, this gap reduction reduces the electromagnetic force amplitude by approximately 40%, directly weakening the vibration source.

[0031] Improved noise spectrum: Experimental data show that after adopting this structure, the 100Hz fundamental frequency noise is reduced by 8-12dB, the 200Hz harmonic noise is reduced by 5-8dB, and the noise is reduced from 65dB to below 58dB.

[0032] The wave height of 301 stainless steel plate is 0.5-1.5mm. A wave height that is too small will result in insufficient elasticity, while a wave height that is too large will increase installation difficulty. The wavelength is 10-20mm. A wave that is too short will easily cause local stress concentration, while a wave that is too long will reduce the uniformity of pressure distribution. Depending on the length of the core 1, 5-8 wave peaks can be arranged for every 100mm of length.

[0033] The interference fit on one side of the 301 stainless steel plate is 0.1-0.3mm. Too little interference fit will not provide sufficient preload, while too much interference fit increases the risk of installation damage. Sandblasting the contact surface between the 301 stainless steel plate and the core 1 (roughness Ra 3.2-6.3μm) can increase the friction coefficient by 20-30%, enhance the self-locking performance of the structure, and further suppress vibration transmission.

[0034] Furthermore, a plurality of first heat dissipation channels 4 for dissipating heat from the middle of the iron core 1 are formed between the side surface of the stainless steel plate 301 and the inner wall of the installation cavity 2 .

[0035] Furthermore, the cross section of the first heat dissipation channel 4 is triangular.

[0036] Furthermore, the stainless steel plate 301 is formed by pressing 304 stainless steel and has a thickness of 0.5-1 mm.

[0037] Specifically, such as Figure 2 As shown in the figure, the sharp edges of the triangular flow channel can form a local low-pressure area. When the reactor is operating, when the air flows from top to bottom in the flow channel, the low-pressure effect at the sharp edges will increase the turbulence of the air. Turbulent air can more effectively carry away heat. Compared with laminar air, the heat transfer coefficient in the turbulent state can be increased by 2-3 times.

[0038] 304 stainless steel has excellent thermal conductivity, with a coefficient of thermal conductivity of approximately 16.2 W / (m•K). When heat is generated in the center of the iron core 1, it is rapidly transferred through the stainless steel plate 301 to the first heat dissipation channel 4. Compared to ordinary carbon steel, 304 stainless steel has a thermal conductivity efficiency that is approximately 20% higher, helping to accelerate heat transfer. 304 stainless steel also has excellent corrosion resistance. During long-term operation, it will not corrode due to environmental factors (such as humidity and chemicals), thereby ensuring the structural integrity of the heat dissipation channel and the stability of its heat dissipation performance. If corrosive materials are used, rust may form on the channel surface, obstructing air flow and reducing heat dissipation efficiency.

[0039] When the thickness of 301 stainless steel plate is 0.5-1mm, the thermal resistance is relatively low, allowing heat to be transferred more quickly from the core 1 to the flow channel. For example, when the thickness is reduced from 1mm to 0.5mm, the thermal resistance can be reduced by approximately 30%, reducing the core 1 temperature by 2-5°C (depending on the specific operating conditions). Thin plates also reduce the overall weight of the reactor, lowering costs.

[0040] However, a thickness that's too small can result in insufficient strength for the 301 stainless steel plate, potentially causing deformation when subjected to top pressure and operational vibration, affecting the shape of the heat dissipation channel and its effectiveness. Therefore, 0.5mm represents a lower limit that takes both heat dissipation and structural strength into account. 301 stainless steel plate with a thickness of 0.5-1mm meets heat dissipation requirements while also providing sufficient structural strength.

[0041] Furthermore, the coil package 5 is composed of multiple layers of coils 6 , and elastic spacers 7 are provided between each layer of coils 6 . The elastic spacers 7 form a second heat dissipation channel 8 between two adjacent layers of coils 6 .

[0042] Furthermore, the cross section of the elastic isolation member 7 is I-shaped, and the elastic isolation member 7 is a rubber strip.

[0043] Specifically, such as Figure 1 As shown, a second heat dissipation channel 8 is formed between two adjacent layers of coils 6 through the action of elastic isolation members 7 , allowing air to flow from top to bottom to take away the heat emitted by the coils 6 , thereby reducing the temperature of the coils 6 .

[0044] A rubber material with thermally conductive fillers (such as aluminum oxide or boron nitride) can be used, achieving a thermal conductivity of 0.8-1.2 W / (m•K), three to five times that of ordinary rubber. This thermally conductive rubber can quickly transfer heat from the coil 6 to the heat dissipation channel while maintaining electrical insulation properties.

[0045] The damping properties of rubber absorb the vibration energy of coil 6, reducing vibration-induced noise and structural fatigue. For example, a rubber loss factor between 0.1 and 0.3 can effectively attenuate vibration amplitude by 30-50% without affecting the thermal conductivity of the heat dissipation channel. The damping effect of the second heat dissipation channel 8 and the rubber together reduce reactor noise.

[0046] The first flow channel handles the high-density heat source (core 1), while the second flow channel handles the low-density but large-area heat source (coil 6), achieving a rational allocation of heat dissipation resources. Simulations show that this tiered strategy can improve the overall heat dissipation efficiency of the reactor by 20-30%.

[0047] By combining the first heat dissipation channel 4 and the second heat dissipation channel 8, the total heat dissipation area of ​​the reactor can be increased by 2-3 times. For example, the original design heat dissipation area is 0.5 m², but after adopting the dual-channel structure, the heat dissipation area can reach 1.5-2.0 m².

[0048] When winding the coil 6, a pre-tightening force will be applied to the rubber strip. Then, the reaction force generated by the rubber strip being squeezed will act on the iron core 1, thereby further squeezing the silicon steel sheet to reduce the gap, further reducing the magnetic resistance unevenness, reducing the vibration caused by the electromagnetic force and magnetostrictive force, and further reducing the noise.

[0049] Furthermore, each layer of coil 6 is formed by winding a plurality of turns of glass fiber covered wire.

[0050] Specifically, glass fiber-covered wire uses glass fiber as its insulating base material, boasting high dielectric strength and outstanding corona resistance. Under the high voltage and strong electric field environment of the reactor, it can effectively prevent inter-turn short circuits and interlayer breakdown, ensuring safe operation of the equipment. While the thermal conductivity of glass fiber itself is approximately 0.035 W / (m•K), lower than that of metal, the surface of glass fiber-covered wire is typically coated with materials such as thermally conductive silicone or epoxy resin, significantly improving its overall thermal conductivity. Glass fiber has high tensile and flexural strength, making the glass fiber-covered wire less prone to breakage during the winding process and able to withstand the vibration and electromagnetic forces of the reactor during operation.

[0051] Furthermore, it also includes a locking device, which includes an upper bracket 9 and a lower bracket 16. The upper bracket 9 is arranged on both sides of the upper end of the iron core 1, and the lower bracket 16 is arranged on both sides of the lower end of the iron core 1. The two upper brackets 9 on both sides of the upper end are connected by a first bolt 10, and the two lower brackets 16 on both sides of the lower end are connected by a first bolt 10. The bottom surface of the lower bracket 16 is provided with a base 14, and the base 14 is provided with a waist-shaped mounting hole 13. The sides of the upper bracket 9 and the lower bracket 16 are provided with a fixing seat 12 protruding outward, and the fixing seat 12 at the upper end is connected to the fixing seat 12 at the lower end by a second bolt 11.

[0052] Specifically, such as Figure 1As shown, the upper bracket 9 and the lower bracket 16 are respectively arranged on both sides of the upper and lower ends of the iron core 1 to form a symmetrical mechanical support system. This layout can effectively disperse the vibration energy of the iron core 1 under the action of electromagnetic force and reduce local stress concentration.

[0053] Lateral constraint of the first bolt 10: The upper and lower brackets are laterally connected by the first bolt 10 to form a stable frame structure. This connection method can resist the electromagnetic force of the iron core 1 in the radial direction (perpendicular to the axis of the iron core 1) and prevent the iron core 1 from shifting.

[0054] Longitudinal locking of the second bolt 11: The fixing base 12 of the upper and lower brackets 16 is longitudinally connected by the second bolt 11, further enhancing the overall rigidity. This connection can suppress the axial vibration of the core 1 (along the axis of the core 1) and reduce noise.

[0055] The base 14 can be connected to the foundation with a rubber pad to absorb high-frequency vibrations. The base 14 has a certain thickness, so that there is a distance between the lower end of the coil 5 and the foundation to prevent the foundation from blocking the second heat dissipation channel 8 under the reactor, ensuring smooth heat dissipation.

[0056] Furthermore, a pressing plate 17 is provided on the top of the upper bracket 9 , a terminal block 18 is provided on the pressing plate 17 , an insulating seat 20 is provided between the terminal block 18 and the pressing plate 17 , and a lifting lug 19 is also provided on the upper pressing plate 17 .

[0057] Specifically, such as Figure 1 As shown, terminal block 18 should be designed with multiple terminals to accommodate different numbers of lead wires. For example, for a three-phase reactor, terminal block 18 can have 6-12 terminals. The terminal spacing must comply with safety regulations (e.g., ≥25mm) to prevent arcing. Insulation base 20 should be made of a high-temperature-resistant, high-insulation material, such as epoxy resin or SMC composite material. Lifting lugs 19 should be installed near the center of gravity of the reactor to ensure balance during lifting. Coil 6 lead wires should be protected with insulating sleeves or heat shrink tubing, and pressure plate 17 should also be made of insulating material.

[0058] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Based on the technical essence of the present invention and within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement of the above embodiment shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A damping type three-phase reactor, comprising a reactor body, wherein the reactor body comprises an iron core (1) formed by stacking a plurality of silicon steel sheets and a coil (5) wound on the iron core (1), characterized in that: The top and bottom surfaces of the iron core (1) are both provided with an installation cavity (2) recessed toward the middle of the iron core (1), the coil (5) is located between the two installation cavities (2), and a pressurized top pressure piece (3) is provided in the installation cavity (2). When the pressurized top pressure piece (3) is subjected to pressure, it can apply pressure in the opposite direction to the iron core (1) to reduce the gap between the silicon steel sheets.

2. A damping type three-phase reactor according to claim 1, characterized in that: The pressing member (3) is a corrugated stainless steel plate (301), the cross section of the stainless steel plate (301) is wavy, the width of both sides of the stainless steel plate (301) is greater than the width of the installation cavity (2), and the two sides of the stainless steel plate (301) respectively contact the inner walls opposite to the installation cavity (2).

3. A damping type three-phase reactor according to claim 2, characterized in that: A plurality of first heat dissipation channels (4) for dissipating heat from the middle of the iron core (1) are formed between the side surface of the stainless steel plate (301) and the inner wall of the installation cavity (2).

4. A damping type three-phase reactor according to claim 3, characterized in that: The cross section of the first heat dissipation channel (4) is triangular.

5. The damping type three-phase reactor according to claim 3, characterized in that: The stainless steel plate (301) is formed by pressing 304 stainless steel and has a thickness of 0.5-1 mm.

6. The damping type three-phase reactor according to claim 1, characterized in that: The coil package (5) is composed of multiple layers of coils (6), and elastic isolation members (7) are provided between each layer of coils (6). The elastic isolation members (7) form a second heat dissipation channel (8) between two adjacent layers of coils (6).

7. The damping type three-phase reactor according to claim 6, characterized in that: The cross section of the elastic isolating member (7) is in the shape of an I-beam, and the elastic isolating member (7) is a rubber strip.

8. The damping type three-phase reactor according to claim 6, characterized in that: Each layer of coil (6) is formed by winding a plurality of turns of glass fiber covered wire.

9. The damping type three-phase reactor according to claim 1, characterized in that: The invention also includes a locking device, which includes an upper bracket (9) and a lower bracket (16). The upper bracket (9) is arranged on both sides of the upper end of the iron core (1), and the lower bracket (16) is arranged on both sides of the lower end of the iron core (1). The two upper brackets (9) on both sides of the upper end are connected by a first bolt (10), and the two lower brackets (16) on both sides of the lower end are connected by a first bolt (10). The bottom surface of the lower bracket (16) is provided with a base (14), and the base (14) is provided with a waist-shaped mounting hole (13). The sides of the upper bracket (9) and the lower bracket (16) are both provided with a fixing seat (12) protruding outward, and the fixing seat (12) at the upper end is connected to the fixing seat (12) at the lower end by a second bolt (11).

10. The damping type three-phase reactor according to claim 9, characterized in that: A pressing plate (17) is provided on the top of the upper bracket (9), a terminal block (18) is provided on the pressing plate (17), an insulating seat (20) is provided between the terminal block (18) and the pressing plate (17), and a lifting lug (19) is also provided on the upper pressing plate (17).

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