A shock-absorbing type three-phase reactor

Abstract

The application discloses a shock-absorbing type three-phase reactor, which comprises a reactor body, wherein the reactor body comprises an iron core formed by laminating a plurality of silicon steel sheets and a wire package arranged on the iron core; the top surface and the bottom surface of the iron core are both provided with an installation cavity recessed to the middle part of the iron core; the wire package is located between the two installation cavities; and a top pressing piece is arranged in the installation cavity and is pressed. When the top pressing piece is pressed, the pressure can be reversely applied to the iron core to reduce the gap between the silicon steel sheets. The application can effectively reduce the magnetostriction vibration of the silicon steel sheets and further reduce the noise.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric reactors, in particular to a shock-absorbing three-phase electric reactor. BACKGROUND

[0002] The electric reactor is also called an inductor coil, which is basically composed of a coil and a core, and the core is composed of a plurality of silicon steel sheets.

[0003] In the prior art, supports are only installed on the upper end and the lower end of the core, and the supports at the upper end and the lower end are connected by bolts to fix the core vertically, and when the silicon steel sheets are not tightly attached to each other, there will be a small gap between the sheets. When the electric reactor is running, the silicon steel sheets in the core will experience a magnetostriction phenomenon under the action of an alternating magnetic field, that is, the silicon steel sheets will periodically elongate and shorten with the change of the magnetic field. The vibration caused by the magnetostriction of the silicon steel sheets will be hindered and disturbed due to the existence of the gap, resulting in that the vibration energy cannot be effectively transmitted and dissipated, but will be reflected and superimposed between the sheets, thereby enhancing the magnetostriction vibration and increasing the noise. SUMMARY

[0004] The purpose of the present application is to provide a shock-absorbing three-phase electric reactor that can effectively reduce the magnetostriction vibration of the silicon steel sheets and thereby reduce the noise.

[0005] To solve the above technical problems, the present application adopts the following scheme:

[0006] A shock-absorbing three-phase electric reactor includes an electric reactor body, the electric reactor body includes a core composed of a plurality of silicon steel sheets and a wire package wound on the core, the top surface and the bottom surface of the core are provided with installation cavities recessed to the middle part of the core, the wire package is located between the two installation cavities, and a top pressure piece is provided in the installation cavity and is under pressure. When the top pressure piece is under pressure, it can reversely act on the core to reduce the gap between the silicon steel sheets.

[0007] In this scheme, the noise of the electric reactor is mainly caused by the gap between the silicon steel sheets, which can cause the core to vibrate through mechanisms such as magnetic resistance change, magnetic attraction, and magnetostriction effect, and thereby generate noise. The larger the gap, the more obvious the unevenness of the magnetic resistance, and the stronger the vibration and noise.

[0008] The reactor in the application is characterized in that installation cavities are arranged on the top surface and the bottom surface of the iron core, and a top pressing piece is arranged in the installation cavities. The top pressing piece is initially pressed, and the pressure mainly comes from the extrusion of the wire winding on the iron core and the size of the top pressing piece is slightly smaller than the width of the installation cavity. After the top pressing piece is installed, the top pressing piece is extruded by the iron core on both sides, so that the top pressing piece exerts a reverse pressure on the iron core, thereby reducing the gap between the silicon steel sheets. This design directly aims at the gap problem, reduces the magnetic resistance unevenness by reducing the gap, reduces the vibration caused by the electromagnetic force and the magnetostriction force, and further reduces the noise. When the top pressing piece is pressed, the pressure is uniformly transmitted to the iron core, so that the gap between the silicon steel sheets is compressed. This pressure transmission mode ensures that the force of each part of the iron core is uniform, and local stress concentration is avoided. Through the pressure action of the top pressing 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 the magnetostriction force. The installation cavities are arranged on the top surface and the bottom surface of the iron core, which does not occupy additional space and is convenient for the installation and maintenance of the top pressing piece.

[0009] Optionally, the top pressing piece is a corrugated stainless steel plate, the cross section of the stainless steel plate is wave-shaped, and the width of the two sides of the stainless steel plate is greater than the width of the installation cavity.

[0010] Optionally, the first heat dissipation channel is formed between the side surface of the stainless steel plate and the inner wall of the installation cavity.

[0011] Optionally, the cross section of the first heat dissipation channel is triangular.

[0012] Optionally, the stainless steel plate is pressed and formed by 304 stainless steel material, and the thickness is 0.5-1mm.

[0013] Optionally, the wire winding is composed of multiple layers of coils, and an elastic isolation piece is arranged between each layer of coils, so that a second heat dissipation channel is formed between the adjacent two layers of coils.

[0014] Optionally, the cross section of the elastic isolation piece is H-shaped, and the elastic isolation piece is a rubber strip.

[0015] Optionally, each layer of coil is composed of a plurality of turns of glass silk wire.

[0016] Optionally, the locking device further comprises an upper support and a lower support, the upper support is arranged on the upper end of the iron core, the lower support is arranged on the lower end of the iron core, the two upper supports on the upper end are connected by a first bolt, the two lower supports on the lower end are connected by a first bolt, a base is arranged on the bottom surface of the lower support, a waist-shaped mounting hole is arranged on the base, a fixed seat protruding outward is arranged on the side surface of the upper support and the lower support, and the fixed seat on the upper end is connected with the fixed seat on the lower end by a second bolt.

[0017] Optionally, the upper support top is provided with a pressing plate, the pressing plate is provided with a wiring row, the wiring row and the pressing plate are provided with an insulating seat, and the upper pressing plate is further provided with an ear.

[0018] The present application has the beneficial effects of:

[0019] 1. In the present application, after the top pressing piece is installed, it is extruded by the two iron cores, so that the top pressing piece exerts a reverse pressure on the iron core, thereby reducing the gap between the silicon steel sheets, reducing the magnetic resistance unevenness by reducing the gap, reducing the vibration caused by electromagnetic force and magnetostriction force, and further reducing the noise.

[0020] 2. When the top pressing piece is pressed, the pressure is evenly transmitted to the iron core, so that the gap between the silicon steel sheets is compressed. This pressure transmission mode ensures that the force of each part of the iron core is uniform, avoiding local stress concentration. Through the pressure action of the top pressing piece, the gap between the silicon steel sheets is effectively reduced, thereby improving the magnetic flux density distribution and reducing the vibration caused by electromagnetic force and magnetostriction force. The installation cavity is arranged on the top surface and the bottom surface of the iron core, which does not occupy additional space, and facilitates the installation and maintenance of the top pressing piece. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present application;

[0022] Figure 2 It is a structural schematic diagram of the bottom of the present application;

[0023] Figure 3 It is a structural schematic diagram of the corrugated stainless steel plate.

[0024] Reference signs: 1-iron core, 2-installation cavity, 3-top pressing 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 support, 10-first bolt, 11-second bolt, 12-fixing seat, 13-waist-shaped mounting hole, 14-base, 15-insulating layer, 16-lower support, 17-pressing plate, 18-wiring row, 19-ear, 20-insulating seat. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below in combination with the embodiments and the drawings, but the implementation mode of the present application is not limited thereto.

[0026] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "back", "top", "bottom", and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "provided", "opened", "mounted", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. Embodiment

[0028] A shock-absorbing type three-phase reactor comprises a reactor body, the reactor body comprising a core 1 formed by laminating a plurality of silicon steel sheets and a wire package 5 wound on the core 1, the top surface and the bottom surface of the core 1 are provided with installation cavities 2 recessed to the middle part of the core 1, the wire package 5 is located between the two installation cavities 2, and a top pressing piece 3 under pressure is arranged in the installation cavity 2, and the top pressing piece 3 can reversely act on the core 1 to reduce the gap between the silicon steel sheets when under pressure.

[0029] In the present embodiment, the outer surface of the core 1 in the existing reactor is provided with an insulating layer 15, which is generally coated with insulating paint, and insulating plates are also provided at the positions adjacent to the core 1 at the upper end and the lower end of the wire package 5 (not shown in the figure). The main source of noise of the reactor is that the gap between the silicon steel sheets will cause the core 1 to vibrate through the mechanisms of magnetic resistance change, magnetic attraction, and magnetostriction effect, thereby generating noise, and the larger the gap, the more obvious the unevenness of the magnetic resistance, and the stronger the vibration and noise.

[0030] In the present embodiment, as Figure 1 and Figure 2As shown, the core 1 has three core columns (the core columns are located in the coil 5, not shown in the figure) of left part, middle part and right part, and there are three coils 5 in total. The reactor is provided with mounting cavities 2 on the top surface and the bottom surface of the core 1, and a top pressing piece 3 is arranged in the mounting cavities 2. The top pressing piece 3 is initially under pressure, and the pressure mainly comes from the extrusion of the coil 5 to the core 1, which is mainly generated during the manufacturing process of the reactor, or the size of the top pressing piece 3 is slightly larger than the width of the mounting cavity 2, which is used for installing the top pressing piece 3 after the manufacturing of the reactor is completed. The top pressing piece 3 is extruded by the core 1 on both sides, mainly in the radial direction, so that the top pressing piece 3 exerts a reverse pressure on the core 1, thereby reducing the gap between the silicon steel sheets. This design directly targets the gap problem, reduces the magnetic resistance inhomogeneity by reducing the gap, reduces the vibration caused by the electromagnetic force and the magnetostriction force, and further reduces the noise. When the top pressing piece 3 is under pressure, the pressure is uniformly transmitted to the core 1, so that the gap between the silicon steel sheets is compressed. This pressure transmission mode ensures that the core 1 is uniformly stressed, and local stress concentration is avoided.

[0031] Through the pressure action of the top pressing piece 3, 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 the magnetostriction force. The mounting cavities 2 are arranged on the top surface and the bottom surface of the core 1, which does not occupy additional space and is convenient for the installation and maintenance of the top pressing piece 3.

[0032] Further, the top pressing piece 3 is a corrugated stainless steel plate 301, and the cross section of the stainless steel plate 301 is wave-shaped. The width of the stainless steel plate 301 on both sides is greater than the width of the mounting cavity 2, and the stainless steel plate 301 on both sides is in contact with the inner wall of the mounting cavity 2 opposite to each other.

[0033] Specifically, as shown in Figure 1 and Figure 3 , the width of the stainless steel plate 301 on both sides is slightly larger than the width of the mounting cavity 2 (an amount of interference is designed), and the wave-shaped structure is elastically compressed by external force during installation. This deformation forms a continuous pre-pressure (similar to the reaction force after spring compression) in the core 1, which ensures that the gap between the silicon steel sheets is always under pressure. The periodic fluctuations of the wave-shaped structure make the pressure uniformly distributed along the axial direction of the core 1, avoiding local stress concentration. For example, if the wave-shaped period is 50 mm, the pressure distribution curve within every 50 mm length presents periodic fluctuations, but the overall average remains stable. The elastic modulus of typical 304 stainless steel is about 193 GPa, which can achieve a balance between high stiffness and flexibility in combination with the wave-shaped structure. When the pre-pressure is 10 MPa, the compression amount of the single-layer wave-shaped plate can be controlled within the range of 0.1-0.3 mm, which ensures the gap reduction effect while avoiding material yielding.

[0034] Vibration suppression mechanism: The pre-pressure reduces the gap between silicon steel sheets from the initial 0.05-0.1mm to 0.01-0.03mm, and the magnetic resistance uniformity is improved by more than 30%. According to the Maxwell stress tensor theory, the gap reduction reduces the electromagnetic force amplitude by about 40%, directly weakening the vibration source strength.

[0035] Noise spectrum improvement: Experimental data shows that after using 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.

[0036] The wave height of the stainless steel plate 301 is 0.5-1.5mm, and the wave height is too small to cause insufficient elasticity, and too large to increase the installation difficulty. The wavelength is 10-20mm, and the wavelength is too short to cause local stress concentration, and too long to reduce the uniformity of pressure distribution. According to the length of the core 1, 5-8 wave crests can be arranged per 100mm length.

[0037] The single-sided interference of the stainless steel plate 301 is 0.1-0.3mm, and the interference is too small to provide sufficient pre-pressure, and too large to increase the risk of installation damage. The contact surface of the stainless steel plate 301 and the core 1 is sandblasted (roughness Ra3.2-6.3μm), which can increase the friction coefficient by 20-30%, enhance the self-locking performance of the structure, and further suppress the vibration transmission.

[0038] Further, the side surface of the stainless steel plate 301 and the inner wall of the installation cavity 2 form a plurality of first heat dissipation channels 4 that conduct heat from the middle of the core 1.

[0039] Further, the cross section of the first heat dissipation channel 4 is triangular.

[0040] Further, the stainless steel plate 301 is made of 304 stainless steel material and has a thickness of 0.5-1mm.

[0041] Specifically, as shown in Figure 2 The sharp edge of the triangular-shaped flow channel can form a local low-pressure area. When the reactor is running, the low-pressure effect at the sharp edge will enhance the turbulence degree of the air flowing from top to bottom in the flow channel. The turbulent air can effectively carry away heat, and the heat transfer coefficient in the turbulent state can be increased by 2-3 times compared with the laminar air.

[0042] 304 stainless steel has good thermal conductivity, with a thermal conductivity coefficient of about 16.2 W / (m•K). When heat is generated in the middle of the core 1, it can be quickly conducted to the first heat dissipation channel 4 through the stainless steel plate 301. Compared with ordinary carbon steel, the thermal conductivity efficiency of 304 stainless steel can be increased by about 20%, which helps to speed up the heat transfer speed. 304 stainless steel has good corrosion resistance, and will not corrode due to environmental factors such as humidity and chemicals during long-term operation, thereby ensuring the structural integrity and stability of the heat dissipation flow channel. If a material that is prone to corrosion is used, rust may form on the surface of the flow channel, hindering air flow and reducing heat dissipation efficiency.

[0043] When the thickness of the stainless steel plate 301 is 0.5-1mm, the thermal resistance is relatively small, and the heat can be quickly conducted 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 about 30%, and the temperature of the core 1 can be reduced by 2-5℃ (depending on the specific working conditions). Thin plates can also reduce the overall weight of the reactor and reduce costs.

[0044] However, too small thickness will result in insufficient strength of the stainless steel plate 301, which may deform when subjected to top pressure and operating vibration, affecting the shape of the heat dissipation flow channel and the heat dissipation effect. Therefore, 0.5mm is a lower limit value considering heat dissipation and structural strength. The 304 stainless steel plate 301 with a thickness of 0.5-1mm meets the heat dissipation requirements while also providing sufficient structural strength.

[0045] Further, the wire winding 5 is composed of multiple layers of coils 6, and an elastic spacer 7 is arranged between each layer of coils 6, which forms a second heat dissipation channel 8 between the adjacent two layers of coils 6.

[0046] Further, the cross section of the elastic spacer 7 is in the shape of an I-beam, and the elastic spacer 7 is a rubber strip.

[0047] Specifically, as shown in Figure 1 The adjacent two layers of coils 6 form a second heat dissipation channel 8 through the action of the elastic spacer 7, allowing air to flow from top to bottom and taking away the heat emitted by the coils 6 to reduce the temperature of the coils 6.

[0048] A rubber material with added heat-conducting fillers (such as aluminum oxide and boron nitride) can be used, with a thermal conductivity coefficient of 0.8-1.2 W / (m•K), which is 3-5 times that of ordinary rubber. This heat-conducting rubber can quickly conduct the heat of the coils 6 to the heat dissipation flow channel while maintaining electrical insulation performance.

[0049] The damping property of the rubber can absorb the vibration energy of the coil 6, and reduce the noise and structural fatigue caused by vibration. For example, the loss factor of the rubber is between 0.1-0.3, which can effectively attenuate the vibration amplitude by 30-50%, while not affecting the heat conduction performance of the heat dissipation channel. The second heat dissipation channel 8 and the damping effect of the rubber together reduce the noise of the reactor.

[0050] The first flow channel processes high-density heat sources (the core 1), and the second flow channel processes low-density but large-area heat sources (the coil 6), so as to realize the reasonable distribution of heat dissipation resources. Simulation shows that this hierarchical strategy can increase the overall heat dissipation efficiency of the reactor by 20-30%.

[0051] In combination with 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, and after adopting the double-flow channel structure, the heat dissipation area can reach 1.5-2.0 m².

[0052] When winding the coil 6, a pre-tightening force will be applied to the rubber strip, and then the counterforce generated by the extrusion of the rubber strip will act on the core 1, further extruding and compressing the silicon steel sheet to reduce the gap, further reduce the unevenness of the magnetic resistance, reduce the vibration caused by the electromagnetic force and the magnetostriction force, and further reduce the noise.

[0053] Further, each layer of the coil 6 is wound by a plurality of turns of glass silk wire.

[0054] Specifically, the glass silk wire has glass fiber as an insulating base material, has high insulation strength, and has outstanding corona resistance. In the high-voltage and strong electric field environment of the reactor, it can effectively prevent turn-to-turn short circuit and layer-to-layer breakdown, and ensure safe operation of the equipment. The thermal conductivity coefficient of glass fiber is about 0.035 W / (m•K), which is lower than that of metal materials, but the surface of the glass silk wire is usually coated with heat-conducting silicone or epoxy resin and other materials, which can significantly improve its overall heat conduction performance. Glass fiber has high tensile strength and bending strength, so the glass silk wire is not easy to break during winding, and can withstand the vibration and electromagnetic force during operation of the reactor.

[0055] Further, the locking device includes an upper support 9 and a lower support 16. The upper support 9 is arranged on both sides of the upper end of the core 1, and the lower support 16 is arranged on both sides of the lower end of the core 1. The two upper supports 9 on both sides of the upper end are connected by a first bolt 10, and the two lower supports 16 on both sides of the lower end are connected by a first bolt 10. The bottom surface of the lower support 16 is provided with a base 14, and the base 14 is provided with a waist-shaped mounting hole 13. The side surfaces of the upper support 9 and the lower support 16 are both provided with outwardly protruding fixing seats 12, and the fixing seat 12 at the upper end is connected with the fixing seat 12 at the lower end by a second bolt 11.

[0056] Specifically, as shown in FIG. 6, the reactor is provided with a locking device. Figure 1As shown, the upper support 9 and the lower support 16 are respectively arranged on the upper and lower ends of the iron core 1, forming 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.

[0057] Transverse constraint of the first bolt 10: the upper and lower end supports are transversely connected by the first bolt 10, forming a stable frame structure. This connection can resist the electromagnetic force of the iron core 1 in the radial direction (perpendicular to the axis direction of the iron core 1), preventing the iron core 1 from deviating.

[0058] Longitudinal locking of the second bolt 11: the fixing seat 12 of the upper and lower supports 16 is longitudinally connected by the second bolt 11, further enhancing the overall stiffness. This connection can suppress the vibration of the iron core 1 in the axial direction (along the axis direction of the iron core 1), reducing noise.

[0059] The base 14 can be connected to the foundation with rubber pads to absorb high-frequency vibrations. The base 14 has a certain thickness, so that there is a gap between the lower end of the coil 5 and the foundation, avoiding the foundation blocking the second heat dissipation channel 8 below the reactor, ensuring smooth heat dissipation.

[0060] Further, the upper support 9 is provided with a pressing plate 17 at the top, and a wiring strip 18 is arranged on the pressing plate 17. An insulating seat 20 is arranged between the wiring strip 18 and the pressing plate 17. A lifting lug 19 is also arranged on the upper pressing plate 17.

[0061] Specifically, as shown in the drawings, Figure 1 The wiring strip 18 should be designed with multiple terminals to accommodate different numbers of outgoing wires. For example, for a three-phase reactor, the wiring strip 18 can be provided with 6-12 terminals, and the terminal spacing should comply with safety specifications (such as ≥25mm) to prevent arc discharge. The insulating seat 20 should be made of high-temperature-resistant and high-insulation materials such as epoxy resin or SMC composite material. The lifting lug 19 should be installed near the center of gravity of the reactor to ensure balance during lifting. The outgoing wires of the coil 6 are protected by insulating sleeves or heat shrink tubes, and the pressing plate 17 should also be made of insulating materials.

[0062] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. According to the technical essence of the present application, any simple modification, equivalent replacement and improvement of the above embodiment within the spirit and principles of the present application are still within the protection scope of the present application.

Claims

1. A vibration-damping 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 provided with mounting cavities (2) that are recessed towards the center of the iron core (1). The coil (5) is located between the two mounting cavities (2). The mounting cavity (2) is provided with a pressure-bearing top member (3). When the pressure-bearing top member (3) is pressed, it can reverse the pressure to the iron core (1) to reduce the gap between the silicon steel sheets. The top pressure 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 mounting cavity (2). The two sides of the stainless steel plate (301) respectively abut against the inner wall of the mounting cavity (2).

2. The vibration-damping three-phase reactor according to claim 1, characterized in that, The stainless steel plate (301) side and the inner wall of the mounting cavity (2) form several first heat dissipation channels (4) to conduct heat out of the middle of the iron core (1).

3. A vibration-damping three-phase reactor according to claim 2, characterized in that, The cross-section of the first heat dissipation channel (4) is triangular.

4. A vibration-damping three-phase reactor according to claim 2, characterized in that, The stainless steel plate (301) is formed by pressing 304 stainless steel material and has a thickness of 0.5-1mm.

5. A vibration-damping three-phase reactor according to claim 1, characterized in that, The coil (5) is composed of multiple layers of coils (6), and each layer of coils (6) is provided with an elastic insulating member (7). The elastic insulating member (7) makes a second heat dissipation channel (8) between two adjacent layers of coils (6).

6. A vibration-damping three-phase reactor according to claim 5, characterized in that, The cross-section of the elastic isolation element (7) is I-shaped, and the elastic isolation element (7) is a rubber strip.

7. A vibration-damping three-phase reactor according to claim 5, characterized in that, Each layer of coil (6) is made of several turns of glass wire wrapped around it.

8. A vibration-damping three-phase reactor according to claim 1, characterized in that, It also includes a locking device, which includes an upper bracket (9) and a lower bracket (16). The upper bracket (9) is located on both sides of the upper end of the iron core (1), and the lower bracket (16) is located 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 outwardly protruding fixing seats (12). The upper fixing seat (12) and the lower fixing seat (12) are connected by a second bolt (11).

9. A vibration-damping three-phase reactor according to claim 8, characterized in that, The upper support (9) is provided with a pressure plate (17) at the top, and a terminal block (18) is provided on the pressure plate (17). An insulating seat (20) is provided between the terminal block (18) and the pressure plate (17). The upper pressure plate (17) is also provided with a lifting lug (19).

Images