Damping ventilation strip, dry-type air-core reactor and installation method

Abstract

The application discloses a damping ventilation strip, a dry-type air-core reactor and a mounting method, and belongs to the technical field of dry-type air-core reactors. The damping ventilation strip comprises a first set of components and a second set of components, and the two are connected through a mortise and tenon structure. A gap is arranged between the first set of components and the second set of components, and the gap is filled with elastic polyurethane damping material. The mortise and tenon structure is used to replace the traditional plate structure ventilation strip design, so that the inner and outer encapsulation insulation layers can automatically adapt to micro-displacement when thermal expansion and cold contraction, and the insulation layer can be effectively prevented from cracking. The mortise gap is filled with high-elasticity damping material, further absorbing the deformation stress caused by thermal cycles, and improving the fatigue resistance of the encapsulation layer. Through the viscoelastic energy dissipation characteristics of the damping material, the mechanical resonance risk can be reduced, the optimized composite structure can block the vibration transmission path, reduce the rigid collision between the winding and the encapsulation layer, and significantly reduce the overall noise level.

Description

Technical Field

[0001] This invention relates to the field of dry-type air-core reactor technology, specifically to a damping ventilation strip, a dry-type air-core reactor, and an installation method. Background Technology

[0002] Dry-type air-core reactors are key reactive power compensation and filtering devices in power systems. Due to their advantages such as coreless operation, lack of magnetic saturation, good linearity, and simple maintenance, they are widely used in new energy power generation grid connection, flexible AC transmission systems (FACTS), rail transportation, and industrial power distribution. With the advancement of smart grid construction and the increasing demands for power supply reliability, their market demand continues to grow.

[0003] However, long-term operational experience has shown that traditional dry-type air-core reactors face two prominent technical bottlenecks: when the reactor operates under rated load, the winding temperature rises significantly (typically reaching 60K to 75K), leading to radial thermal expansion of the material; conversely, during power outages or sudden drops in ambient temperature, the winding contracts. Since the ventilation strips are typically made of rigid composite materials such as epoxy glass fiber, their coefficient of thermal expansion with the winding conductors (such as aluminum conductors) is approximately 23.4 × 10⁻⁶. -6 / K) and encapsulating insulating layer (thermal expansion coefficient approximately 5.4×10) -6 There is a significant mismatch in the coefficient of thermal expansion (CTE) between the turns and the insulation layer. Under the cyclic thermomechanical stress generated by frequent switching operations (exceeding 5000 thermal cycles in a typical lifespan), the stress cannot be effectively released and buffered by the rigid support structure. According to the principle of mechanical conduction, the outermost layer of the insulation bears the maximum tensile stress during expansion, while the innermost layer bears the maximum compressive stress during cooling and contraction. This long-term concentration of alternating stress easily leads to the formation and gradual propagation of microcracks in the inner and outer insulation layers, eventually causing cracking. After the insulation layer cracks, external moisture and contaminants can easily penetrate, causing inter-turn insulation to become damp and hydrolyze, increasing dielectric loss, and intensifying partial discharge activity. In severe cases, this can lead to inter-turn short circuits or even equipment burnout, seriously threatening power grid safety and significantly shortening equipment lifespan.

[0004] The CTE mismatch between the aforementioned materials not only generates static stress but also, under the influence of alternating electromagnetic fields, excites continuous mechanical vibrations with frequencies ranging from 100Hz to 400Hz (mainly twice the power frequency and its multiples). Traditional rigid ventilation strip structures cannot effectively dampen and dissipate this vibrational energy, causing the vibrations to be amplified and transmitted throughout the reactor via the supporting structure, generating significant structural noise, with sound pressure levels typically reaching 65dB to 75dB or even higher.

[0005] Currently, the main improvement strategies in the industry for addressing the above problems focus on optimizing the formulation of encapsulating insulation materials, improving impregnation processes, or strengthening external protective coatings. While these approaches have some effect, they fail to fundamentally change the rigid connection and stress concentration inherent between the encapsulation layer and the supporting structure. Existing ventilation strip designs primarily focus on mechanical support and heat dissipation functions; their materials and structures themselves lack stress buffering and vibration damping capabilities, becoming a critical pathway for stress transmission and noise amplification.

[0006] Therefore, how to solve the problems of low reliability and excessive noise in long-term operation of dry-type air-core reactors has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a damping ventilation strip, a dry-type air-core reactor, and an installation method to overcome the problems of traditional dry-type air-core reactors, which use a rigid ventilation strip support structure, causing the encapsulation layer to be subjected to alternating concentrated stress under thermal cycling and thus easily cracking. At the same time, they cannot effectively dampen the mechanical vibration generated by electromagnetic-thermal coupling, resulting in decreased equipment insulation reliability and excessive operating noise.

[0008] The present invention solves the above-mentioned technical problems through the following technical solution: This invention provides a damping ventilation strip, comprising: The first set of components and the second set of components are connected by a mortise and tenon joint structure. A gap is provided between the first group of components and the second group of components, and the gap is filled with elastic polyurethane damping material.

[0009] A further improvement of the present invention is that the first group of components and the second group of components are made of glass fiber reinforced unsaturated polyester resin material.

[0010] A further improvement of the present invention is that the elastic polyurethane damping material in the gap is filled by casting and then curing.

[0011] A further improvement of the present invention is that the curing time of the elastic polyurethane damping material is not less than 30 minutes.

[0012] The present invention also provides a dry air reactor comprising multiple encapsulations, wherein a damping ventilation strip as described above is provided between the first adjacent encapsulation and the last adjacent encapsulation, and pre-impregnated molded ventilation strips are provided between the remaining adjacent encapsulations.

[0013] A further improvement of the present invention is that the damping ventilation strip is placed vertically and evenly along the circumference of the encapsulation.

[0014] A further improvement of the present invention is that the damping ventilation strip is placed vertically and evenly along the 70mm~80mm chord length of the enclosed circumference.

[0015] A further improvement of the present invention is that the encapsulation is composed of epoxy resin impregnated glass fiber yarn wound together.

[0016] A further improvement of the present invention is that the pre-impregnated ventilation strip is made of glass fiber reinforced unsaturated polyester resin material through a drawing process.

[0017] The present invention also provides a method for installing a dry-type air-core reactor, comprising the following steps: Wrap the envelopes one by one in sequence, placing the damping ventilation strip as described above between the first and last adjacent envelopes, and placing pre-impregnated molded ventilation strips between the remaining adjacent envelopes, until the last envelope is completed.

[0018] Compared with the prior art, the positive and progressive effects of the present invention are as follows: The damping ventilation strip provided by this invention includes: a first set of components and a second set of components, which are connected by a mortise and tenon structure; a gap is provided between the first set of components and the second set of components, and the gap is filled with elastic polyurethane damping material. The mortise and tenon structure replaces the traditional plate structure ventilation strip design, which allows the inner and outer encapsulated insulation layers to adapt to micro-displacement during thermal expansion and contraction, avoiding the concentration of tensile / compressive stress caused by temperature changes, thereby effectively preventing the insulation layer from cracking. Combined with the high elasticity damping material filling the mortise and tenon gap, it further absorbs the deformation stress caused by thermal cycling and improves the fatigue resistance of the encapsulation layer; through the viscoelastic energy dissipation characteristics of the damping material, the risk of mechanical resonance can be reduced. The optimized composite structure can block the vibration transmission path and reduce the rigid collision between the winding and the encapsulation layer, resulting in a significant reduction in the overall noise level. Attached Figure Description

[0019] The accompanying drawings are provided to further understand the invention and constitute a part of this invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] Figure 1 A schematic diagram of an existing dry-type air-core reactor; Figure 2 A top view of the damping ventilation strip structure; Figure 3 This is a schematic cross-sectional view of the assembly structure of the damping ventilation strip and the dry-type air reactor.

[0021] Among them, 1. First group of components; 2. Gap; 3. Second group of components; 4. Damping ventilation strip; 5. Pre-impregnated molded ventilation strip; 6. Encapsulation. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. This is an explanation of the present invention and not a limitation thereof.

[0028] See Figure 1In existing technologies, dry-type air-core reactors employ a multi-enclosed parallel winding structure, with conductive star arms connecting the upper and lower sections. Each enclosed winding has an insulating layer formed by epoxy resin-impregnated glass fiber yarn, creating a rigid circular sleeve support. Adjacent enclosed sections are vertically spaced by pre-impregnated ventilation strips 5, forming axial heat dissipation channels. These ventilation strips are made of glass fiber-reinforced unsaturated polyester resin, manufactured through impregnation, pre-forming, and hot-pressing curing processes. Common standard cross-sectional dimensions are 25mm×6mm and 19mm×6mm, with length L cut according to product specifications. They feature high hardness, high strength, low deformation rate, and excellent weather resistance. Under rated operating conditions, the reactor winding temperature rises to 60~75K, generating radial expansion stress. According to the principle of mechanical conduction, the outermost enclosed section bears the maximum tensile stress; while during power outages or sudden drops in ambient temperature, the winding contraction causes the innermost enclosed section to bear the maximum compressive stress. Frequent switching operations induce cyclic thermomechanical stress (typically >5000 cycles). Because each encapsulation is supported by rigid ventilation strips, this stress cannot be buffered and released, ultimately leading to: 1) cracks and fissures in the inner / outer encapsulation insulation layers, causing moisture penetration and increased dielectric loss; 2) deterioration of inter-turn insulation until breakdown and burnout; 3) plastic deformation and structural instability and detachment of the ventilation strips. Furthermore, due to the encapsulation insulation layer (CTE≈5.4×10⁻⁶), -6 / K), ventilation strips (CTE≈7.8×10) -6 / K) and winding conductor (CTE≈23.4×10 -6 The mismatch in the coefficient of thermal expansion (CTE) of the K-type structure will generate mechanical vibrations with a frequency of 100-400Hz during operation, resulting in structural noise with a sound pressure level of 65-75dB.

[0029] To solve the above problems, see [link to relevant documentation]. Figure 2 The present invention provides a damping ventilation strip, comprising: The first group of components 1 and the second group of components 3 are connected by a mortise and tenon joint structure. A gap 2 is provided between the first group of components 1 and the second group of components 3, and the gap 2 is filled with elastic polyurethane damping material.

[0030] To address the issues of encapsulation cracking and noise caused by thermal stress and mechanical vibration during operation of dry-type air-core reactors, this invention proposes a damping ventilation strip 4 based on a mortise and tenon structure and damping materials. Through a combination of structural innovation and material optimization, this achieves dual improvements: (1) Stress relief and crack resistance optimization The mortise and tenon structure replaces the traditional plate-type ventilation strip design, allowing the six inner and outer insulation layers to adapt to micro-displacements during thermal expansion and contraction. This avoids stress concentration caused by temperature changes in tension / compression, effectively preventing insulation layer cracking. Furthermore, the high-elasticity damping material filling the mortise and tenon gaps further absorbs deformation stress caused by thermal cycling, enhancing the fatigue resistance of the six insulation layers.

[0031] (2) Vibration suppression and noise reduction By utilizing the viscoelastic energy dissipation characteristics of the damping material, the axial and radial vibration energy generated during reactor operation is converted into heat energy for dissipation, reducing the risk of mechanical resonance. The optimized composite structure can block the vibration transmission path and reduce rigid collisions between the windings and the six-layer encapsulation, resulting in a significant reduction in the overall noise level (measured reduction of 5~10dB).

[0032] This solution simultaneously optimizes structural reliability and acoustic performance, providing a feasible technical path for the long-life, low-noise operation of dry-type air-core reactors.

[0033] By creating a gap 2 filled with elastic polyurethane damping material between the first group of components 1 and the second group of components 3, the damping ventilation strip 4 innovatively introduces a flexible stress buffer layer inside the support structure. The elastic polyurethane material possesses excellent elasticity and deformation recovery capabilities, effectively absorbing and releasing cyclic thermomechanical stresses caused by the mismatch in the coefficient of thermal expansion (CTE) between the winding conductor, the encapsulation insulation layer 6, and the ventilation strip. Especially during the thermal cycling process caused by frequent switching, this structure can significantly reduce the peak values ​​of alternating tensile and compressive stresses acting on the inner and outer encapsulation insulation layers 6 due to stress concentration, fundamentally inhibiting the initiation and propagation of microcracks, effectively preventing insulation layer cracking, thereby significantly improving the insulation reliability of the reactor during long-term operation and extending the equipment's service life.

[0034] Elastic polyurethane damping material possesses excellent viscoelasticity and high internal friction characteristics, enabling it to rapidly convert and dissipate the 100Hz-400Hz mechanical vibration energy excited by alternating electromagnetic fields into heat energy. This structure alters the transmission and amplification path of vibration in traditional rigid ventilation strips, achieving effective isolation and attenuation of the vibration source through an internal damping layer. This design significantly reduces the overall structural noise of the reactor, substantially suppressing the sound pressure level and effectively solving the problem of excessive noise in traditional dry-type air-core reactors, meeting increasingly stringent environmental and operational requirements.

[0035] The mortise and tenon joint between the first set of components 1 and the second set of components 3 not only ensures the mechanical strength and stability of the overall ventilation strip structure and facilitates assembly and positioning, but also works synergistically with the internal elastic damping layer. The mortise and tenon connection provides a reliable force transmission path, while the damping layer plays a role in regulating stress and vibration. This makes the overall connection more stable and its fatigue resistance superior when the ventilation strip is subjected to complex conditions such as drastic temperature changes and electromagnetic impacts.

[0036] Preferably, the first group of components 1 and the second group of components 3 are made of glass fiber reinforced unsaturated polyester resin material.

[0037] The first and second sets of components are made of high-strength, high-modulus glass fiber reinforced unsaturated polyester resin (commonly known as "glass fiber polyester"). Its coefficient of thermal expansion (CTE) is similar to that of epoxy glass fiber composite materials, ensuring the inherent and necessary structural compatibility and connection strength with the traditional encapsulated insulation layer. However, the key to this invention lies in introducing a gap 2 filled with elastic polyurethane damping material between the two rigid glass fiber polyester components. This constitutes a sandwich structure of "rigid component - flexible damping layer - rigid component." This structure creatively establishes a controllable, repeatably deformable stress buffer interface within the support system. When the reactor expands or contracts due to temperature changes, the rigid glass fiber polyester component provides stable geometric constraints and support, while the intermediate elastic polyurethane layer, through its large deformation capacity, actively absorbs and compensates for the stress caused by the aluminum conductor (CTE≈23.4×10⁻⁶). -6 / K), encapsulated in 6 layers (CTE≈5.4×10 -6 The majority of shear and tensile / compressive stresses resulting from the CTE difference between the encapsulation layer 6 and the glass fiber polyester component are transferred and dissipated into the flexible damping layer inside the ventilation strip, fundamentally altering the stress transmission path. This effectively protects the weakest encapsulation layer 6, preventing the generation and propagation of microcracks and significantly improving the durability of the insulation system under thermal cycling.

[0038] Glass fiber reinforced unsaturated polyester resin is rigid and has limited vibration damping effect, and may even amplify vibration. However, this invention combines it with a high-dissipation elastic polyurethane damping material, utilizing the property of polyurethane to convert a large amount of mechanical energy into heat energy under alternating stress. This combination makes the damping ventilation strip 4 exhibit excellent confined layer damping (CLD) effect: the rigid glass fiber polyester components on both sides act as a confined layer, forcing the elastic polyurethane layer in the middle to undergo strong shear deformation in the 100-400Hz vibration excited by electromagnetic force, thereby maximizing the dissipation of vibration energy and effectively isolating the vibration transmission path from the inside to the outside. This reduces the overall structural noise sound pressure level to a level far below that of traditional designs, solving the problem of excessive noise.

[0039] Preferably, the elastic polyurethane damping material in gap 2 is filled by curing after casting.

[0040] The liquid polyurethane prepolymer can fully flow and wet the cavities and surfaces formed by the tenon and mortise structures of the first and second sets of components 3 (glass fiber polyester parts) during the casting process, ensuring a thorough filling without dead corners or air bubbles. After curing, a strong chemical and physical bonding interface is formed between the polyurethane material and the glass fiber polyester parts, avoiding delamination, slippage, or stress concentration points caused by poor adhesion, thus ensuring the integrity of the "rigid-flexible-rigid" composite structure and the effectiveness of stress transfer. The casting process allows the polyurethane to cure in situ in a relaxed state. Compared with pressing prefabricated elastic sheets into the assembly, it can significantly reduce the residual stress inside the damping layer, putting it in its optimal working state from the initial stage and improving fatigue life. This process is suitable for filling gaps 2 with complex shapes, and it connects smoothly with the molding or pultrusion molding process of glass fiber polyester parts. It is easy to achieve automated or semi-automated production, ensuring the uniformity and stability of product performance, which is conducive to large-scale industrial applications. It eliminates the risk of fretting wear, loosening, or uneven aging rates between components that may be caused by long-term thermal cycling and vibration. The polyurethane material is securely encapsulated between rigid components, reducing direct contact with the external environment, which helps slow down its aging and ensures that the damping function remains stable throughout the entire equipment life cycle.

[0041] From a manufacturing perspective, the ventilation strip is produced as an independent, prefabricated functional module. The casting process ensures controllable manufacturing quality and convenient inspection of the four modules of the damping ventilation strip (the damping layer performance can be controlled via process parameters). If needed, it can be replaced as a whole relatively easily, improving the feasibility of future maintenance.

[0042] Preferably, the curing time of the elastic polyurethane damping material is not less than 30 minutes.

[0043] See Figure 3 Based on the same inventive concept, the present invention also provides a dry air reactor, comprising multiple encapsulations 6, wherein a damping ventilation strip 4 as described above is provided between the first adjacent encapsulation 6 and the last adjacent encapsulation 6, and a pre-impregnated molded ventilation strip 5 is provided between the remaining adjacent encapsulations 6.

[0044] If all internal ventilation strips use damping ventilation strips 4, the expansion or contraction will be too large, causing internal winding displacement. Since force and noise diffuse inwards and outwards through rigid contact, it is only necessary to have buffer interfaces at the outermost and innermost adjacent enclosures, using damping ventilation strips 4, while using pre-impregnated ventilation strips 5 between the remaining adjacent enclosures 6. The damping ventilation strips 4 primarily absorb the deformation stress caused by thermal cycling of all materials in the reactor product, improving the fatigue and crack resistance of the enclosure 6 layers. Simultaneously, they convert the axial and radial vibration energy generated during the operation of the dry-type air-core reactor into heat energy for dissipation, reducing the risk of mechanical resonance and thus lowering the product's operating noise.

[0045] Preferably, the damping ventilation strip 4 is placed vertically and evenly along the circumference of the enclosure 6.

[0046] The radial stress generated by thermal expansion and contraction of the enclosure 6 is evenly distributed to each damping ventilator 4, avoiding stress concentration in local areas. The stress amplitude borne by each damping unit is significantly reduced, allowing it to operate in a more optimal buffer zone, further improving the reliability and durability of the entire stress buffering system.

[0047] Preferably, the damping ventilation strip 4 is placed vertically and evenly along the circumferential chord length of the enclosure 6, which is 70mm to 80mm.

[0048] Analysis and experimental verification have shown that this chord length range is the optimal range calculated based on the mechanical characteristics (stiffness, thickness) and thermal expansion amplitude of the enclosure 6 of a typical-sized dry-type hollow reactor. It ensures that the bending stress of the enclosure 6 segments between adjacent support points remains within a safe range during thermal deformation, while allowing each damping ventilator 4 to fully utilize its elastic deformation capacity to absorb its assigned stress, thus minimizing the overall stress level and maximizing the utilization of buffer resources.

[0049] Preferably, the encapsulation 6 is made of epoxy resin impregnated glass fiber yarn wound together.

[0050] Encapsulation formed by epoxy resin impregnated glass fiber yarn winding 6 has excellent electrical insulation properties and mechanical strength, but its interlaminar shear strength is relatively low, and its coefficient of thermal expansion (approximately 5.4 × 10⁻⁶) is also low. -6 The difference between the epoxy fiberglass encapsulation 6 and aluminum conductors is significant. Traditional rigid ventilation strips, rigidly connected to this encapsulation 6, directly transfer enormous in-plane shear stress and normal tensile / compressive stress to the laminated structure of the encapsulation 6 during thermal cycling, easily leading to interlayer debonding and microcracks. This invention, through the elastic buffer layer of the damping ventilation strip 4, transforms the concentrated stress generated by the rigid contact into a significantly attenuated and more evenly distributed load acting on the surface of the encapsulation 6, thereby effectively protecting the weakest interlayer interface of the epoxy fiberglass encapsulation 6 and significantly improving its thermal fatigue resistance.

[0051] In a specific embodiment of the present invention, the pre-impregnated molded ventilation strip 5 is made of glass fiber reinforced unsaturated polyester resin material by a drawing process.

[0052] Pre-impregnated molded ventilation strips (typically traditional epoxy fiberglass rectangular strips) are mature standard parts in the industry, with relatively low costs. They can effectively control the overall material costs of the product while ensuring a significant improvement in overall performance, achieving an optimal balance between performance and cost.

[0053] Based on the same inventive concept, the present invention also provides an installation method for a dry-type air-core reactor, comprising the following steps: Wrap the envelopes 6 one by one in sequence. Place the damping ventilation strip 4 as described above between the first adjacent envelope 6 and the last adjacent envelope 6. Place the pre-impregnated molded ventilation strip 5 between the remaining adjacent envelopes 6 until the last envelope 6 is completed.

[0054] Installation method: 1. Installation method of damping ventilation strip 4: Fix the first set of components 1 and the second set of components 3 in a mold with the same thickness, and then pour elastic polyurethane into the gap 2 between the two until it is full. After curing for 30 minutes, demold.

[0055] 2. Installation method of damping ventilation strip 4 and reactor: See Figure 3 The encapsulations from the inside out are, in order, the first encapsulation, the second encapsulation, the third encapsulation, ..., the (N-1)th encapsulation and the outermost Nth encapsulation; After the first encapsulation is wound, a damping ventilation strip 4 is placed vertically and evenly along the chord length of the encapsulation circle of 70~80mm. Then, the second encapsulation to the N-1 encapsulation are wound in sequence. For the adjacent encapsulations between the second encapsulation and the N-1 encapsulation, a traditional pre-impregnated molded ventilation strip 5 is placed vertically and evenly along the chord length of the encapsulation circle of 70~80mm. After the N-1 encapsulation is wound, a damping ventilation strip 4 is placed vertically and evenly along the chord length of the outer circumference of the encapsulation circle of 70~80mm. Finally, the outermost Nth encapsulation is wound.

[0056] Damping ventilation strip features: stable structure, strong buffering capacity, and the damping elastic polyurethane material has excellent weather resistance and a long service life; Reactor features: strong crack resistance, safe and stable product operation; noise can be reduced by 5~10dB, and pollution is low.

[0057] The damping ventilation strip 4 mainly absorbs the deformation stress caused by thermal cycling of all materials in the reactor product, improves the fatigue resistance and crack resistance of the 6-layer encapsulation, and converts the axial and radial vibration energy generated during reactor operation into heat energy for dissipation, reducing the risk of mechanical resonance, thereby reducing product operating noise.

[0058] Finally, it should be noted that the embodiments listed above are merely one or more specific manifestations of the technical solution of this invention. Their purpose is to clearly illustrate the concept, principle, and application of this invention through specific examples, and is by no means intended to limit the scope of protection of this invention to these specific embodiments. In fact, the true value of this invention lies in its proposed technical ideas and innovations, rather than its manifestations or implementation methods.

[0059] For those skilled in the art, after thoroughly reading and understanding the technical solution of this invention, they are fully capable of making various changes, modifications, or equivalent substitutions to the specific implementation of the invention based on their own professional knowledge and skills. These changes may include, but are not limited to: adjusting the range of technical parameters, optimizing the algorithm flow to improve efficiency, and replacing some technical components to achieve better compatibility or reduce costs. As long as these modified technical solutions substantially retain the technical features claimed by the original invention, that is, they can still achieve the core functions and effects of this invention, then these changes should be considered to fall within the scope of protection of the pending claims of this invention.

[0060] Furthermore, with the continuous progress and development of technology, new technical means and methods are constantly emerging, which provides ample space for further improvement and perfection of this invention. Therefore, the scope of protection of this invention should also include reasonable and foresightful improvements and extensions based on existing technology. As long as these improvements and extensions do not depart from the basic principles and core concepts of this invention, they should be considered equivalents of this invention and are equally protected by patent rights.

Claims

1. A dry-type air-core reactor, characterized in that, It includes multiple packages (6), with a damping ventilation strip (4) between the first adjacent package (6) and the last adjacent package (6), and a pre-impregnated molded ventilation strip (5) between the remaining adjacent packages (6); Among them, the damping ventilation strip (4) includes: The first set of components (1) and the second set of components (3) are connected by a mortise and tenon joint. A gap (2) is provided between the first group of components (1) and the second group of components (3), and the gap (2) is filled with elastic polyurethane damping material.

2. A dry-type air-core reactor according to claim 1, characterized in that, The first group of components (1) and the second group of components (3) are made of glass fiber reinforced unsaturated polyester resin material.

3. A dry-type air-core reactor according to claim 1, characterized in that, The elastic polyurethane damping material in the gap (2) is filled by casting and curing.

4. A dry-type air-core reactor according to claim 2, characterized in that, The curing time for the elastic polyurethane damping material is no less than 30 minutes.

5. A dry-type air-core reactor according to claim 1, characterized in that, The damping ventilation strip (4) is placed vertically and evenly along the circumference of the enclosure (6).

6. A dry-type air-core reactor according to claim 5, characterized in that, The damping ventilation strip (4) is placed vertically and evenly along the circumferential chord length of the enclosure (6) for 70mm~80mm.

7. A dry-type air-core reactor according to claim 1, characterized in that, The encapsulation (6) is made of epoxy resin impregnated glass fiber yarn wound together.

8. A dry-type air-core reactor according to claim 1, characterized in that, The pre-impregnated molded ventilation strip (5) is made of glass fiber reinforced unsaturated polyester resin material by a drawing process.

9. A method for installing a dry-type air-core reactor as described in any one of claims 1 to 8, characterized in that, Includes the following steps: Wrap the envelopes (6) one by one in sequence, place a damping ventilation strip (4) between the first adjacent envelope (6) and the last adjacent envelope (6), and place a pre-impregnated molded ventilation strip (5) between the remaining adjacent envelopes (6) until the last envelope (6) is wound.

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