A vibration mode wide-frequency regulation exoskeleton for a vibration-guided transformer and the transformer

Abstract

The application discloses a damping and guiding type transformer vibration mode wide frequency regulation and control exoskeleton and a transformer, and relates to the technical field of transformers. The exoskeleton comprises a top rigid constraint skeleton arranged at the top of a main body and used for fixedly connecting the top of the main body, a bottom bearing base skeleton arranged at the bottom of the main body and used for supporting the main body and fixedly connected with the bottom of the main body, a primary side skeleton arranged at the primary side of the main body, a secondary side skeleton arranged at the secondary side of the main body and a regulation and control skeleton used for adjusting the overall rigidity of the exoskeleton so as to change the natural frequency of the transformer. The exoskeleton system can realize wide range adjustment of the overall mode of the transformer without changing the internal structure of the transformer and without significantly increasing the volume of the transformer, effectively suppresses the mechanical resonance of the transformer and greatly improves the mute / low vibration operation performance of the transformer.

Description

Technical Field

[0001] This application relates to the field of transformer technology, specifically to a vibration-damping and guiding transformer vibration mode broadband control exoskeleton and transformer. Background Technology

[0002] As the core equipment of a substation, the transformer undertakes the crucial function of voltage transformation and is fundamental to ensuring efficient power transmission and distribution. During transformer operation, the magnetostrictive effect of the iron core and the electromagnetic force generated by the alternating current in the windings jointly induce mechanical vibration. This vibration not only radiates noise and vibration energy outwards but also causes adverse effects: 1. Noise pollution; 2. Accelerated mechanical fatigue aging of the internal insulation structure, leading to a shortened overall lifespan of the equipment and even inducing serious safety accidents such as insulation breakdown.

[0003] Current noise reduction technologies mostly employ passive protection strategies, such as adding soundproof enclosures or applying damping materials over a large area of ​​the casing to suppress vibration propagation. However, this method has significant drawbacks: the additional structure severely hinders heat dissipation, easily leading to excessive temperature rise and increasing the risk of thermal breakdown; at the same time, it significantly increases the size of the equipment and manufacturing costs, which is not conducive to the compact layout of substations and may affect the efficiency of daily maintenance and repair.

[0004] Furthermore, once a traditional transformer is assembled, its natural frequency is fixed and cannot be adjusted. When the electromagnetic excitation frequency couples with the natural frequency during operation and falls into the resonance region, it will trigger severe mechanical resonance, significantly exacerbating structural damage. Adjusting the natural frequency requires reconstructing the electromagnetic and mechanical design schemes, which is difficult to implement, time-consuming, and costly, almost overturning the existing design, resulting in wasted resources and difficulty in adapting to changes in actual operating conditions. Summary of the Invention

[0005] The purpose of this application is to overcome the shortcomings of existing technologies that make it difficult to adjust mechanical modes and thus control the vibration characteristics of transformers, and to provide a vibration-damping and guiding transformer vibration mode broadband control exoskeleton and transformer to solve the problems in the prior art.

[0006] To address the aforementioned problems, a first aspect of this application provides a vibration-damping and guiding transformer vibration mode broadband control exoskeleton, installed on the exterior of the transformer body, comprising:

[0007] A top rigid constraint skeleton is disposed at the top of the main body and is used to fix and connect the top of the main body;

[0008] The bottom supporting basic skeleton is set at the bottom of the main body and is used to support the main body and is fixedly connected to the bottom of the main body;

[0009] The original side skeleton is set on the original side of the main body;

[0010] Secondary side skeletons are set on the secondary side of the main body;

[0011] The control skeleton is used to adjust the overall stiffness of the exoskeleton in order to change the natural frequency of the transformer; there are two control skeletons, which are respectively arranged on both sides of the length direction of the main body;

[0012] The upper ends of the primary side bone, the secondary side bone, and the control bone are all connected to the top rigid constraint bone; the lower ends of the primary side bone, the secondary side bone, and the control bone are all connected to the bottom supporting foundation bone.

[0013] In one possible implementation, the control skeleton includes a stiffness adjustment module, the position of which is adjustable relative to the top rigid constraint skeleton and the bottom load-bearing foundation skeleton; the upper end of the stiffness adjustment module is connected to the top rigid constraint skeleton, and the lower end is connected to the bottom load-bearing foundation skeleton.

[0014] Specifically, by adjusting the position of the stiffness adjustment module, the overall stiffness of the exoskeleton is adjusted, thereby changing the natural frequency of the transformer.

[0015] In one possible implementation, the stiffness adjustment module includes two support arms arranged in a figure-eight shape, with the upper end of the support arm connected to the top rigid constraint skeleton and the lower end connected to the bottom load-bearing foundation skeleton.

[0016] The angle between the two support arms is adjustable; wherein, by adjusting the angle between the two support arms, the overall stiffness of the exoskeleton is adjusted, thereby changing the natural frequency of the transformer.

[0017] In one possible implementation, the control skeleton further includes tension adjustment devices, and there are one or more tension adjustment devices; wherein, when there are multiple tension adjustment devices, the multiple tension adjustment devices are arranged sequentially along the height direction of the body;

[0018] The two ends of the tension adjustment control correspond to the two support arms respectively, and the end of the tension adjustment control passes through the corresponding support arm; the end of the tension adjustment control is provided with a pad, and the pad abuts against the outer wall of the corresponding support arm.

[0019] In one possible implementation, the support arm is provided with a reinforcing part, which is used to improve the strength of the connection between the tension adjustment device and the support arm.

[0020] In one possible implementation, the top rigid constraint skeleton includes a first upper component, a second upper component, and a first connector;

[0021] The first upper component, the second upper component, and the main body are all connected to the first connector, and the top of the main body is clamped between the first upper component and the second upper component;

[0022] The upper end of the original side bone is fixedly connected to the first upper component, and the upper end of the secondary side bone is fixedly connected to the second upper component.

[0023] Both the first upper component and the second upper component are movably provided with a first control end member; the first control end member corresponds to the support arm, wherein the upper end of the support arm is connected to the corresponding first control end member.

[0024] In one possible implementation, the bottom supporting base skeleton includes a support member, a first lower component, a second lower component, a second connector, and a skeleton closing link;

[0025] The support member is located below the main body and is used to support the main body;

[0026] The first lower component, the second lower component, and the main body are all connected to the second connector, and the bottom of the main body is clamped between the first lower component and the second lower component;

[0027] The lower end of the original side bone is fixedly connected to the first lower component, and the lower end of the secondary side bone is fixedly connected to the second lower component.

[0028] The first lower component and the second lower component are movably provided with a second control end member, wherein the second control end member corresponds to the support arm, and the lower end of the support arm is connected to the corresponding second control end member;

[0029] Both the first lower component and the second lower component are fixedly provided with a plurality of the aforementioned skeleton closing links; wherein, the skeleton closing links face the top rigid constraint bone and are fixedly connected to the top rigid constraint bone.

[0030] In one possible implementation, the original lateral skeleton includes a first support column and a first connecting rod. There are multiple first support columns arranged in parallel, and each first support column is connected to the first connecting rod.

[0031] The upper end of the first support column is fixedly connected to the top rigid constraint skeleton, and the lower end is fixedly connected to the bottom load-bearing foundation skeleton.

[0032] In one possible implementation, the secondary side skeleton includes a second support column and a second connecting rod, wherein there are multiple second support columns arranged in parallel, and each second support column is connected to the second connecting rod.

[0033] The upper end of the second support column is fixedly connected to the top rigid constraint skeleton, and the lower end is fixedly connected to the bottom load-bearing foundation skeleton.

[0034] A second aspect of this application provides a transformer, including a main body and a vibration-damping and guiding transformer vibration mode broadband control exoskeleton as described above, wherein the vibration-damping and guiding transformer vibration mode broadband control exoskeleton is disposed outside the main body.

[0035] The beneficial effects of this application include at least the following:

[0036] 1. The exoskeleton reinforces the transformer body, thereby suppressing vibrations generated during operation.

[0037] 2. When installing this exoskeleton, there is no need to disassemble / redesign the internal structure of the transformer body, and it supports rapid external assembly. Under the premise of ensuring heat dissipation efficiency and not significantly increasing the size of the transformer, the overall stiffness of the exoskeleton can be adjusted by regulating the skeleton, thereby dynamically optimizing the overall vibration mode of the transformer, accurately avoiding resonance frequency points, and achieving a synergistic improvement in structural compactness, ease of installation and vibration control performance.

[0038] 3. Achieve non-intrusive vibration control, ensuring core transformer performance. The exoskeleton achieves active control of vibration modes entirely through external mechanical structures, without requiring any modification or disassembly of the transformer's internal electromagnetic core components such as the core and windings. This fundamentally avoids the risks of electromagnetic performance degradation and insulation problems caused by internal structural adjustments. Furthermore, the exoskeleton supports stepless, wide-frequency-range variable stiffness adjustment, adapting to dynamic vibration characteristics under multi-source excitations such as grid harmonics, DC bias, and load variations. This significantly improves the transformer system's vibration robustness and long-term operational reliability under complex operating conditions.

[0039] 4. Achieving a compact structural design to meet high power density requirements. The exoskeleton can utilize high-strength lightweight alloys and topology-optimized structures, with the overall volume increase strictly controlled at around 3% and the weight increase less than 2%, barely altering the original shape and installation interface of the transformer. This characteristic makes it suitable not only for vibration suppression of conventional power transformers but also for applications with extremely stringent requirements for space utilization and power density, such as on-board charging units for new energy vehicles, rail transit traction systems, integrated power platforms for ships, and compact substations for data centers. It provides a feasible path for the coordinated optimization of vibration control and thermal management in highly integrated power equipment.

[0040] 5. Modular and universal design facilitates large-scale engineering applications. The exoskeleton adopts a modular design, supporting quick "install-and-use" configuration and on-site fine-tuning based on transformer size, weight, and measured vibration data, significantly reducing customization costs and implementation time. Furthermore, the exoskeleton boasts high engineering versatility. For mainstream transformers of different sizes, weights, and specifications, only adjustments to the exoskeleton system's geometry and stiffness control range are needed to achieve good structural adaptation and vibration mode optimization. This effectively reduces the customization costs of transformer vibration reduction and significantly shortens implementation and modification cycles, providing a standardized, efficient, and easily scalable universal solution for vibration protection of various transformer models. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 A first schematic diagram of a transformer employing an exoskeleton is shown;

[0043] Figure 2 It shows Figure 1 A second schematic diagram of the transformer;

[0044] Figure 3 A schematic diagram of a vibration-damping and guiding transformer vibration mode broadband control exoskeleton is shown;

[0045] Figure 4 A schematic diagram illustrating the regulation of bones is shown;

[0046] Figure 5 A schematic diagram of a top-rigidly constrained skeleton is shown;

[0047] Figure 6 A schematic diagram of a bottom-supporting basic skeleton is shown;

[0048] Figure 7 A schematic diagram of a primitive lateral skeleton is shown;

[0049] Figure 8 A schematic diagram of a secondary side skeleton is shown;

[0050] Figure 9 A vibration mode simulation diagram of a conventional transformer is shown;

[0051] Figure 10The simulation diagram of the vibration modes of a transformer using an exoskeleton is shown.

[0052] Figure 11 This diagram shows a comparison of the vibration spectrum results of a traditional transformer and a transformer using an exoskeleton.

[0053] Explanation of key component symbols:

[0054] 1-Main body, 2-Top rigid constraint skeleton, 3-Bottom load-bearing foundation skeleton, 4-Primary side skeleton, 5-Secondary side skeleton, 6-Adjusting skeleton, 21-First upper component, 22-Second upper component, 23-First adjusting end piece, 24-First connecting piece, 31-First lower component, 32-Second lower component, 33-Supporting piece, 34-Second adjusting end piece, 35-Second connecting piece, 36-Skeleton closing link, 41-First support column, 42-First connecting rod, 51-Second support column, 52-Second connecting rod, 61-Support arm, 62-Tension adjusting control, 63-Padded block, 64-Reinforcing block. Detailed Implementation

[0055] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the technical solutions of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the described embodiments are merely some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0056] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0057] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 this application.

[0058] In the description of this application, the serial numbers assigned to components, such as "first," "second," etc., are only used to distinguish the described objects and have no sequential or technical meaning. Furthermore, unless otherwise specified, the terms "connection" and "linkage" used in this application include both direct and indirect connections (linkages).

[0059] In this application, some or all of the components of the exoskeleton may be made of high-strength lightweight alloy.

[0060] See Figures 1-3 In this embodiment, a vibration-damping and guiding transformer vibration mode broadband control exoskeleton is proposed, which is installed on the outside of the transformer body 1. For ease of description, the "vibration-damping and guiding transformer vibration mode broadband control exoskeleton" is referred to as "exoskeleton" in this document.

[0061] The exoskeleton includes a top rigid constraint skeleton 2, a bottom load-bearing foundation skeleton 3, a primary side skeleton 4, a secondary side skeleton 5, and a control skeleton 6. The primary side skeleton 4 and the secondary side skeleton 5 are located on opposite sides of the main body 1 along its length. The primary side of the transformer has an input terminal for connecting to a power source, and the secondary side has an output terminal for connecting to electrical equipment.

[0062] A top rigid constraint skeleton 2 is installed on the top of the main body 1. The top rigid constraint skeleton 2 is used to securely connect the top of the main body 1. The top rigid constraint skeleton 2 can fix the iron core mechanism of the upper part of the main body 1, enhance the mechanical structure of the main body 1, and reduce vibration.

[0063] A bottom supporting basic skeleton 3 is installed at the bottom of the main body 1. The bottom supporting basic skeleton 3 supports the main body 1 and is fixedly connected to the bottom of the main body 1. The bottom supporting basic skeleton 3 bears the overall weight of the main body 1 and the exoskeleton.

[0064] Original side skeleton 4 is set on the original side of the main body 1.

[0065] Secondary side bone 5 is set on the secondary side of the main body 1.

[0066] The control skeleton 6 is used to adjust the overall stiffness of the exoskeleton to change the natural frequency of the transformer. There are two control skeletons 6, one on each side of the length of the main body 1.

[0067] The upper ends of the primary side bone 4, the secondary side bone 5, and the regulating bone 6 are all connected to the top rigid constraint bone 2; the lower ends of the primary side bone 4, the secondary side bone 5, and the regulating bone 6 are all connected to the bottom bearing foundation bone 3.

[0068] The top rigid constraint skeleton 2 provides top anchor points for the primary side skeleton 4, secondary side skeleton 5, and control skeleton 6, while the bottom load-bearing base skeleton 3 provides bottom anchor points for the primary side skeleton 4, secondary side skeleton 5, and control skeleton 6. Furthermore, the top rigid constraint skeleton 2 and the bottom load-bearing base skeleton 3 work together to serve as the foundation of the entire external vibration damping frame, clamping and fixing the transformer body 1 located in the middle while providing stable mounting anchor points for the other skeletons. The top rigid constraint skeleton 2 and the bottom load-bearing base skeleton 3 are connected as a whole under the action of the primary side skeleton 4, secondary side skeleton 5, and control skeleton 6. Through the mutual cooperation of these skeletons, the displacement of the transformer in multiple dimensions (e.g., length, width, and height) is restricted, suppressing the overall vibration and deformation of the transformer.

[0069] Based on one or more of the above embodiments, as a preferred implementation, the control skeleton 6 includes a stiffness adjustment module, the position of which is adjustable relative to the top rigid constraint skeleton 2 and the bottom load-bearing foundation skeleton 3. The upper end of the stiffness adjustment module is connected to the top rigid constraint skeleton 2, and the lower end is connected to the bottom load-bearing foundation skeleton 3.

[0070] Specifically, by adjusting the position of the stiffness adjustment module, the overall stiffness of the exoskeleton is adjusted, thereby changing the natural frequency of the transformer.

[0071] Based on one or more of the above embodiments, as a preferred implementation, such as Figure 4 As shown, the stiffness adjustment module includes two support arms 61 arranged in a figure-eight shape. The upper end of the support arm 61 is connected to the top rigid constraint skeleton 2, and the lower end is connected to the bottom load-bearing foundation skeleton 3.

[0072] The angle between the two support arms 61 is adjustable. By adjusting the angle between the two support arms 61, the overall stiffness of the exoskeleton can be adjusted, thereby changing the natural frequency of the transformer.

[0073] Specifically, by adjusting the angle between the two support arms 61, the overall structural stiffness of the exoskeleton in the lateral direction can be directly changed, thereby changing the overall vibration mode of the transformer, effectively avoiding the resonant frequency region, and achieving the effect of suppressing resonance, high-frequency vibration and torsional vibration.

[0074] Based on one or more of the above embodiments, as a preferred implementation, such as Figure 4 As shown, the control skeleton 6 also includes tension adjustment devices 62, and there may be one or more tension adjustment devices 62. When there are multiple tension adjustment devices 62, they are arranged sequentially along the height direction of the main body 1. The tension adjustment devices 62 may adopt a rod-like structure.

[0075] In this embodiment, there are two tension adjustment controls 62, which are arranged in parallel. The tension adjustment controls 62 have a certain degree of elasticity, and can produce a certain deformation when the included angle between the two support arms 61 is adjusted.

[0076] The two ends of the tension adjustment control 62 correspond to the two support arms 61 respectively, and the ends of the tension adjustment control 62 pass through the corresponding support arms 61.

[0077] A pad 63 is provided at the end of the tension adjusting control 62, and the pad 63 abuts against the outer wall of the corresponding support arm 61. Both ends of the tension adjusting control 62 may be provided with external threads for mating with a fastening nut. (Refer to...) Figure 4 After the installation of the pad 63 is completed, tighten the fastening nut on the end of the tension adjustment control 62, thereby achieving relative fixation between the tension adjustment control 62 and the support arm 61.

[0078] After the fastening nut is tightened, the end faces of the fastening nut and the washer 63 can fit together. The function of the washer 63 is to level the fastening nut and compensate for installation errors. In addition, it also disperses some stress and protects the tilted support arm 61.

[0079] Reference Figure 4 In the stiffness adjustment module, the left support arm 61 is named A arm and the right support arm 61 is named B arm. The surface of A arm away from B arm is the outer wall of A arm, and the surface of B arm away from A arm is the outer wall of B arm.

[0080] Based on one or more of the above embodiments, as a preferred implementation, the support arm 61 is provided with a reinforcing part to improve the strength of the connection between the tension adjustment device 62 and the support arm 61. Specifically, each connection is provided with a reinforcing part.

[0081] In this embodiment, the support arm 61 can be made of U-shaped channel steel. The reinforcing part is provided in the groove of the support arm 61.

[0082] The reinforcing part includes two reinforcing blocks 64, which are respectively placed on the upper and lower sides of the corresponding tension adjustment control 62.

[0083] The reinforcing block 64 can be fixed in the groove of the support arm 61 by welding or other means.

[0084] Based on one or more of the above embodiments, as a preferred implementation, such as Figure 5 As shown, the top rigid constraint skeleton 2 includes a first upper component 21, a second upper component 22, and a first connector 24. The first connector 24 may be a rod-shaped structure.

[0085] The first upper component 21, the second upper component 22, and the main body 1 are all connected to the first connecting member 24. Specifically, the first connecting member 24 passes through the first upper component 21, the second upper component 22, and the main body 1. The top of the main body 1 is located between the first upper component 21 and the second upper component 22.

[0086] The top of the main body 1 is clamped between the first upper component 21 and the second upper component 22. Both ends of the first connector 24 may be provided with external threads, thereby allowing for locking with nuts, thus keeping the first upper component 21, the second upper component 22, the main body 1, and the first connector 24 mutually fixed. The number of first connectors 24 can be set as needed; in this embodiment, there are two first connectors 24.

[0087] The top rigid constraint skeleton 2 fixes the upper iron core structure of the main body 1, enhances its mechanical structure, and can reduce vibration.

[0088] The upper end of the primary side bone 4 is fixedly connected to the first upper component 21, and the upper end of the secondary side bone 5 is fixedly connected to the second upper component 22.

[0089] First control end members 23 are movably provided on both sides of the first upper component 21 and the second upper component 22. The first control end member 23 corresponds to the support arm 61, wherein the upper end of the support arm 61 is connected to the corresponding first control end member 23. The upper end of the support arm 61 and the corresponding first control end member 23 can be rotatably connected by a rigid shaft.

[0090] There are four first control terminals 23, each corresponding to the upper end of one of the four support arms 61 of the two control skeletons 6. Specifically, one first control terminal 23 is provided on each side of the first upper component 21, and one first control terminal 23 is provided on each side of the second upper component 22.

[0091] The position of the first control end piece 23 can be adjusted, thereby adjusting the distance between the upper ends of the two support arms 61 of the stiffness adjustment module, and thus adjusting the size of the included angle between the two support arms 61.

[0092] The first regulating end member 23 may be provided with a protrusion, and the first upper component 21 and the second upper component 22 may be provided with a sliding groove corresponding to the protrusion (the sliding groove is provided parallel to the width direction of the main body 1), wherein the protrusion is slidably disposed in the sliding groove. The first upper component 21 and the second upper component 22 may be provided with a positioning bolt or other structure, wherein after the position adjustment of the first regulating end member 23 is completed, the corresponding first regulating end member 23 is locked by the positioning thread.

[0093] Based on one or more of the above embodiments, as a preferred implementation, such as Figure 6As shown, the bottom supporting foundation skeleton 3 includes a support member 33, a first lower component 31, a second lower component 32, a second connector 35, and a skeleton closing link 36. The support member 33 can be a plate-like structure, and the second connector 35 and the skeleton closing link 36 can both be rod-like structures.

[0094] The support member 33 is located below the main body 1 and is used to support the main body 1.

[0095] The first lower component 31, the second lower component 32, and the main body 1 are all connected to the second connecting member 35. Specifically, the second connecting member 35 passes through the first lower component 31, the second lower component 32, and the main body 1, wherein the bottom of the main body 1 is located between the first lower component 31 and the second lower component 32.

[0096] The bottom of the main body 1 is clamped between the first lower component 31 and the second lower component 32. The two ends of the second connecting member 35 may be provided with external threads, thereby allowing for locking with nuts, thus keeping the first lower component 31, the second lower component 32, the main body 1, and the second connecting member 35 mutually fixed. The number of second connecting members 35 can be set as needed. In this embodiment, there are two second connecting members 35.

[0097] The bottom supporting skeleton 3 supports the main body 1 and also fixes the lower half of the main body 1, enhancing its mechanical structure and reducing vibration.

[0098] The lower end of the primary side bone 4 is fixedly connected to the first lower component 31, and the lower end of the secondary side bone 5 is fixedly connected to the second lower component 32.

[0099] Second control end members 34 are movably provided on both sides of the first lower component 31 and the second lower component 32. The second control end member 34 corresponds to the support arm 61, wherein the lower end of the support arm 61 is connected to the corresponding second control end member 34. The lower end of the support arm 61 and the corresponding second control end member 34 can be rotatably connected by a rigid shaft.

[0100] There are four second control terminals 34, each corresponding to the lower end of the four support arms 61 of the two control skeletons 6. Specifically, one second control terminal 34 is provided on each side of the first lower assembly 31, and one second control terminal 34 is provided on each side of the second lower assembly 32.

[0101] The position of the second control end piece 34 can be adjusted, thereby adjusting the distance between the lower ends of the two support arms 61 of the stiffness adjustment module, and thus adjusting the size of the included angle between the two support arms 61.

[0102] The second control end piece 34 may be provided with a protrusion, and the first lower component 31 and the second lower component 32 may be provided with a sliding groove corresponding to the protrusion (the sliding groove is provided parallel to the width direction of the main body 1), wherein the protrusion is slidably disposed in the sliding groove. The first lower component 31 and the second lower component 32 may be provided with a positioning bolt or other structure, wherein after the position adjustment of the second control end piece 34 is completed, the corresponding second control end piece 34 is locked by the positioning thread.

[0103] Several skeleton closing links 36 are fixedly installed on both the first lower component 31 and the second lower component 32. The skeleton closing links 36 face the top rigid constraint bone 2 and are fixedly connected to the top rigid constraint bone 2.

[0104] The number of frame closing links 36 can be set as needed, such as four or six. In this embodiment, the total number of frame closing links 36 is eight. The frame closing links 36 can be evenly distributed on the first lower component 31 and the second lower component 32.

[0105] The two ends of the skeleton closing link 36 pass through the top rigid constraint bone 2 and the bottom load-bearing foundation bone 3, respectively, and the two ends of the skeleton closing link 36 can be provided with external threads, thereby locking and fixing with nuts. The skeleton closing link 36 provides pre-tension force in the upper and lower directions for the exoskeleton, connecting the top rigid constraint bone 2 and the bottom load-bearing foundation bone 3 into a whole skeleton.

[0106] Based on one or more of the above embodiments, as a preferred implementation, such as Figure 7 As shown, the original side skeleton 4 includes a first support column 41 and a first connecting rod 42. There are multiple first support columns 41 arranged in parallel, and each first support column 41 is connected to the first connecting rod 42.

[0107] In this embodiment, there are two first support columns 41 and two first connecting rods 42 arranged in parallel. The two ends of the first connecting rods 42 are fixedly connected to the corresponding first support columns 41.

[0108] The upper end of the first support column 41 is fixedly connected to the top rigid constraint skeleton 2, and the lower end is fixedly connected to the bottom load-bearing foundation skeleton 3. For example, the fixed connection can be achieved by bolting, welding, or other methods.

[0109] Based on one or more of the above embodiments, as a preferred implementation, such as Figure 8 As shown, the secondary side skeleton 5 includes a second support column 51 and a second connecting rod 52. There are multiple second support columns 51 arranged in parallel, and each second support column 51 is connected to the second connecting rod 52.

[0110] In this embodiment, there are two second support columns 51 and two second connecting rods 52 arranged in parallel. The two ends of the second connecting rods 52 are respectively fixedly connected to the corresponding second support columns 51.

[0111] The upper end of the second support column 51 is fixedly connected to the top rigid constraint skeleton 2, and the lower end is fixedly connected to the bottom load-bearing foundation skeleton 3. For example, the fixed connection can be achieved by bolting, welding, or other methods.

[0112] The primary side skeleton 4 and secondary side skeleton 5 are mainly used to reinforce the longitudinal structure of the transformer, restrict the longitudinal movement of the transformer, and suppress the vibration and deformation of the transformer.

[0113] In this embodiment, a transformer is also proposed, including a main body 1 and the exoskeleton mentioned above, wherein the exoskeleton is disposed outside the main body 1.

[0114] Users can adjust the natural frequency of the transformer by changing the overall stiffness of the exoskeleton.

[0115] When the stiffness of the exoskeleton needs to be changed, the two support arms 61 of the regulating skeleton 6 are directly rotated using a tool: if the tension adjustment control 62 is pulled inward, the two support arms 61 of the regulating skeleton 6 will contract and move closer to the center under the pre-tension of the tension adjustment control 62, thus making the included angle of the stiffness adjustment module smaller; conversely, if the tension adjustment control 62 is released outward, the included angle will immediately increase. Due to the change in the included angle of the stiffness adjustment module, the proportion of its force components in the transverse and longitudinal directions of the transformer also changes, thereby causing changes in the lateral support resistance torque and overall geometry of the exoskeleton.

[0116] Within a certain range, the included angle of the stiffness adjustment module (i.e., the included angle between the two support arms 61 of the stiffness adjustment module) can be infinitely adjusted. For example, the adjustable range of the included angle of the stiffness adjustment module is 10°-45°.

[0117] In practical use, if it is found that the inherent vibration mode of the transformer after installation coincides with its electromagnetic excitation frequency, thus inducing strong resonance and torsional deformation, it is only necessary to directly adjust the angle of the exoskeleton 6 on the outside of the transformer. By changing the size of the angle, the overall stiffness of the exoskeleton is finely adjusted, forcing the overall natural frequency of the transformer to shift, thereby precisely offsetting the resonance frequency band and destroying the resonance conditions. In this way, mechanical oscillation can be quickly and thoroughly suppressed without changing any of the original internal structure of the transformer, thus avoiding mechanical fatigue and aging of the transformer.

[0118] Please see Figures 9-11As shown, modal simulations and vibration tests under normal load conditions were performed on both the conventional transformer and the transformer using the exoskeleton of this application, without significant changes to the internal structure of the same transformer. The vibration tests yielded vibration acceleration data for the base of both the conventionally structured transformer and the transformer using the exoskeleton of this application. Refer to Table 1:

[0119] Table 1. Comparison of measured vibration accelerations of transformers with traditional structures and those using exoskeletons.

[0120] Test object Traditional structure transformer The proposed exoskeleton system transformer Difference in measured vibration results <![CDATA[vibration acceleration (m / s 2 )]]> 1.856 0.019 1.837 Vibration level La (dB) 125.4 85.6 39.8

[0121] Calculation formula: La = 120 + 20lg(a) 测 ), La is measured in dB.

[0122] Test results show that when the transformer uses a traditional structure, the vibration acceleration level of its base reaches as high as 125.4 dB; while the transformer using the exoskeleton of this application shows a significant reduction in overall vibration acceleration level to 85.6 dB, a decrease of 39.8 dB. Overall, calculations indicate that using the exoskeleton reduces the vibration acceleration amplitude of the transformer by approximately 99%.

[0123] Combination Figures 9-11 Modal and frequency domain analysis reveals that, using the traditional structure, the natural frequency of the transformer's fifth overall longitudinal mode is 53.733 Hz. Under actual transformer operating conditions, the 50 Hz AC input from the power grid inevitably contains a small DC component, which, along with leakage flux, excites a 50 Hz electromagnetic excitation force. Since the natural frequency of the traditional structure (53.733 Hz) is close to the dominant frequency of this electromagnetic excitation force (50 Hz), strong mechanical resonance is induced.

[0124] pass Figure 11 The vibration spectrum data clearly shows that this resonance amplifies the vibration acceleration of the transformer in the 50Hz frequency band, with the vibration peak soaring to 121.32dB, which is the core source of the violent oscillations and noise.

[0125] To address the shortcomings of traditional structures, this application introduces an exoskeleton. By reconstructing and targeting the stiffness of the external support, the natural frequency of the transformer's fifth-order overall longitudinal mode is significantly shifted to 60.349 Hz, achieving a rightward shift of the 6.616 Hz modal frequency. This frequency shift not only widens the frequency difference between the natural frequency and the 50 Hz fundamental electromagnetic excitation force, breaking the critical condition for mechanical resonance and achieving resonance decoupling, but also... Figure 10The above is reflected in the fact that the resonance peak at the 50Hz frequency node is flattened, and the local vibration acceleration at 50Hz drops significantly to 78.99 dB, with a single frequency band reduction of up to 42.33 dB.

[0126] In summary, the exoskeleton proposed in this application actively and completely avoids electromagnetically induced mechanical resonance by precisely controlling the vibration modes of the transformer, suppressing mechanical oscillations in a wide frequency range. This eliminates the stress source that causes mechanical fatigue and aging at its root, extends the safe operating life of the transformer, and reduces its external vibration / noise energy radiation.

[0127] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0128] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A vibration-damping and guiding transformer vibration mode broadband control exoskeleton, installed on the outside of the transformer body, characterized in that, include: A top rigid constraint skeleton is disposed at the top of the main body and is used to fix and connect the top of the main body; The bottom supporting basic skeleton is set at the bottom of the main body and is used to support the main body and is fixedly connected to the bottom of the main body; The original side skeleton is set on the original side of the main body; Secondary side skeletons are set on the secondary side of the main body; The exoskeleton is adjusted to regulate the overall stiffness of the exoskeleton in order to change the natural frequency of the transformer. There are two control skeletons, which are respectively located on both sides of the main body along its length. The primary edge bone, the secondary edge bone, and the control bone are all connected at their upper ends to the top rigid constraint bone; the primary edge bone, the secondary edge bone, and the control bone are all connected at their lower ends to the bottom load-bearing foundation bone; the control bone includes a stiffness adjustment module, the position of which is adjustable relative to the top rigid constraint bone and the bottom load-bearing foundation bone; the upper end of the stiffness adjustment module is connected to the top rigid constraint bone, and the lower end is connected to the bottom load-bearing foundation bone. The stiffness adjustment module is used to adjust the position of the exoskeleton to adjust the overall stiffness of the exoskeleton, thereby changing the natural frequency of the transformer. The stiffness adjustment module includes two support arms arranged in a figure-eight shape. The upper end of the support arm is connected to the top rigid constraint skeleton, and the lower end is connected to the bottom load-bearing foundation skeleton. The angle between the two support arms is adjustable; wherein, by adjusting the angle between the two support arms, the overall stiffness of the exoskeleton is adjusted, thereby changing the natural frequency of the transformer.

2. The vibration-damping and guiding transformer vibration mode broadband control exoskeleton according to claim 1, characterized in that, The control skeleton also includes tension adjustment devices, and there are one or more tension adjustment devices; wherein, when there are multiple tension adjustment devices, the multiple tension adjustment devices are arranged sequentially along the height direction of the main body; The two ends of the tension adjustment control correspond to the two support arms respectively, and the end of the tension adjustment control passes through the corresponding support arm; the end of the tension adjustment control is provided with a pad, and the pad abuts against the outer wall of the corresponding support arm.

3. The vibration-damping and guiding transformer vibration mode broadband control exoskeleton according to claim 2, characterized in that, The support arm is provided with a reinforcing part, which is used to improve the strength of the connection between the tension adjustment device and the support arm.

4. The vibration-damping and guiding transformer vibration mode broadband control exoskeleton according to claim 1, characterized in that, The top rigid constraint skeleton includes a first upper component, a second upper component, and a first connector; The first upper component, the second upper component, and the main body are all connected to the first connector, and the top of the main body is clamped between the first upper component and the second upper component. The upper end of the original side bone is fixedly connected to the first upper component, and the upper end of the secondary side bone is fixedly connected to the second upper component. Both the first upper component and the second upper component are movably provided with a first control end member; the first control end member corresponds to the support arm, wherein the upper end of the support arm is connected to the corresponding first control end member.

5. The vibration-damping and guiding transformer vibration mode broadband control exoskeleton according to claim 1, characterized in that, The bottom supporting foundation skeleton includes a support member, a first lower component, a second lower component, a second connector, and a skeleton closing link; The support member is located below the main body and is used to support the main body; The first lower component, the second lower component, and the main body are all connected to the second connector, and the bottom of the main body is clamped between the first lower component and the second lower component; The lower end of the original side bone is fixedly connected to the first lower component, and the lower end of the secondary side bone is fixedly connected to the second lower component. Both the first lower component and the second lower component are movably provided with a second control end member, wherein the second control end member corresponds to the support arm, and the lower end of the support arm is connected to the corresponding second control end member; Both the first lower component and the second lower component are fixedly provided with a plurality of the aforementioned skeleton closing links; wherein, the skeleton closing links face the top rigid constraint bone and are fixedly connected to the top rigid constraint bone.

6. The vibration-damping and guiding transformer vibration mode broadband control exoskeleton according to claim 1, characterized in that, The original lateral skeleton includes a first support column and a first connecting rod. There are multiple first support columns arranged in parallel, and each first support column is connected to the first connecting rod. The upper end of the first support column is fixedly connected to the top rigid constraint skeleton, and the lower end is fixedly connected to the bottom load-bearing foundation skeleton.

7. The vibration-damping and guiding transformer vibration mode broadband control exoskeleton according to claim 1, characterized in that, The secondary side skeleton includes a second support column and a second connecting rod. There are multiple second support columns arranged in parallel, and each second support column is connected to the second connecting rod. The upper end of the second support column is fixedly connected to the top rigid constraint skeleton, and the lower end is fixedly connected to the bottom load-bearing foundation skeleton.

8. A transformer, characterized in that, The device includes a main body and a vibration-damping and guiding transformer vibration mode broadband control exoskeleton as described in any one of claims 1-7, wherein the vibration-damping and guiding transformer vibration mode broadband control exoskeleton is disposed outside the main body.

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