Multi-dimensional noise reduction clamping device and distribution transformer

Abstract

The invention provides a multi-dimensional noise reduction clamping device. The multi-dimensional noise reduction clamping device comprises a frame body, a clamping assembly, two groups of cam rollers and a buffer driving mechanism, the frame body is provided with a space for accommodating a transformer winding, two groups of clamping assemblies are arranged on the frame body in a sliding manner, and the two groups of clamping assemblies are respectively used for clamping the upper end and the lower end of a winding iron core; the two groups of cam rollers are rotationally arranged at the upper part and the lower part of the frame body respectively, and are used for correspondingly rolling one group of clamping assemblies respectively so as to enable the clamping assemblies to clamp the winding iron core; the buffering driving mechanism is arranged on the frame body, connected with the two sets of cam rollers and used for applying elastic torque to the two sets of cam rollers. According to the multi-dimensional noise reduction clamping device, the transmission efficiency of vibration energy to the frame body can be greatly reduced through the elastic torque brought by the buffer driving mechanism to the cam roller, and diffusion of vibration to other parts is reduced. The invention further provides a distribution transformer adopting the multi-dimensional noise reduction clamping device.

Description

Technical Field

[0001] This invention belongs to the field of noise reduction technology for power distribution transformers, specifically relating to a multi-dimensional noise reduction clamping device and a power distribution transformer. Background Technology

[0002] As a crucial core device in the power system, the distribution transformer shoulders the key mission of realizing voltage transformation and rational distribution of electrical energy. It mainly consists of several key parts such as iron core, windings, oil tank and cooling device. These components work together to ensure the stable transmission and distribution of electricity.

[0003] In existing technologies, the fastening of silicon steel sheets in the core of distribution transformers typically employs a combination of channel steel and bolts and nuts. However, when a distribution transformer is put into operation, the alternating current flowing inside the windings generates a corresponding magnetic field. Under the continuous action of this alternating magnetic field, the core exhibits periodic magnetostriction, inevitably leading to vibration. This stretching vibration is transmitted through the core to the connected channel steel and bolts / nuts. Throughout this vibration transmission process, the bolt / nut connection, as a fixed point in the fastening structure, is relatively vulnerable to vibration transmission. With prolonged operation and repeated vibration transmission, the bolt / nut connection is highly susceptible to fatigue loosening. Loosening of the bolts and nuts reduces the core's fastening performance, leading to increased vibration and noise, winding loosening, and insulation wear, all of which negatively impact the safe and stable operation of the transformer. Summary of the Invention

[0004] This invention provides a multi-dimensional noise reduction clamping device and a distribution transformer, which aims to improve the core fastening stability and reduce vibration noise and component wear risks.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: Firstly, a multi-dimensional noise reduction clamping device is provided, including a frame, clamping components, two sets of cam rollers, and a buffer drive mechanism; the frame has a space for accommodating transformer windings, and two sets of clamping components are slidably arranged on the frame, the two sets of clamping components being used to clamp the upper end and lower end of the winding core respectively; the two sets of cam rollers are rotatably arranged on the upper and lower parts of the frame respectively, and the two sets of cam rollers are used to correspondingly roll one set of clamping components to make the clamping components clamp the winding core; the buffer drive mechanism is arranged on the frame and connected to the two sets of cam rollers, and is used to apply elastic torque to the two sets of cam rollers.

[0006] In conjunction with the first aspect, in one possible implementation, each set of cam rollers includes two cam rollers; each set of clamping assemblies includes two opposing clamping plates for clamping the winding core and located between the two cam rollers, with the two cam rollers respectively pressing against the opposing sidewalls of the two clamping plates; wherein, the two cam rollers of each set are connected to a buffer drive mechanism to obtain elastic torque.

[0007] In some embodiments, the buffer drive mechanism includes a transmission assembly and a buffer assembly; the transmission assembly has a sliding connection end and multiple rotating connection ends, each rotating connection end being connected to a corresponding cam roller, the sliding connection end being slidably connected to the frame, and the transmission assembly being used to convert the rotational motion of its rotating connection end into the linear motion of its sliding connection end; the buffer assembly is disposed on the frame and connected to the sliding connection end.

[0008] For example, the transmission assembly includes a slide rod, two mounting brackets, and multiple rotating gears; the slide rod is vertically slidably mounted on the frame as a sliding connection end; the two mounting brackets are respectively located at both ends of the slide rod, and racks are vertically provided on the two opposite side walls of the two mounting brackets; each rotating gear serves as one of the rotating connection ends and is coaxially connected to each cam roller, and each rotating gear meshes with each rack in a corresponding manner.

[0009] In conjunction with the first aspect, in one possible implementation, the slide bar is provided with a mounting plate; the buffer assembly includes two sets of buffer components and two sets of fasteners; both sets of buffer components are vertically slidably mounted on the frame and are respectively connected to the upper and lower sides of the mounting plate; both sets of fasteners are provided on the frame and are respectively located on the side of the two sets of buffer components away from the mounting plate, and the fasteners are used to press the buffer components against the mounting plate.

[0010] In some embodiments, the buffer includes a sliding plate and an elastic element; the sliding plate is vertically slidably disposed on the frame and abuts or rotates with fasteners; the elastic element is disposed between the sliding plate and the mounting plate.

[0011] For example, the frame is provided with a slide groove, and the sliding plate is slidably connected to the slide groove.

[0012] For example, multiple slide rails are horizontally installed at the top and bottom of the frame, and each clamping plate is slidably connected to each slide rail.

[0013] In conjunction with the first aspect, in one possible implementation, the clamping surfaces of the two sets of clamping assemblies for clamping the winding core are provided with buffer plates.

[0014] The beneficial effects of the multi-dimensional noise reduction clamping device provided by this invention are as follows: Compared with the prior art, the frame in this invention has space to accommodate the transformer winding, which is equivalent to a frame set around the transformer winding. It does not require changing the structural layout of the transformer winding itself. The clamping components are slidably connected to the frame to meet the adjustment requirements of the clamping force. The two sets of clamping components can form a distributed clamping of the winding core from the upper and lower ends. Compared with the traditional connection method of channel steel and bolts and nuts, it can effectively avoid damage to the winding core and fatigue loosening of the fasteners caused by local stress concentration. The two sets of cam rollers obtain elastic torque through a buffer drive mechanism and continuously act on the clamping components in a dynamic rolling manner. When the winding core vibrates periodically in an alternating magnetic field, the vibration is transmitted to the cam roller, thus transforming the oscillating motion of the winding core into the rotational motion of the cam roller. This not only suppresses the transmission of vibration to the frame but also helps reduce vibration noise. The elastic torque provided by the buffer drive mechanism to the cam roller can significantly reduce the transmission efficiency of vibration energy to the frame and reduce the diffusion of vibration to other components. At the same time, the elastic torque of the buffer drive mechanism can also absorb some vibration energy. Under this dual effect, the noise generated during the operation of the device is significantly reduced, effectively improving the transformer operating environment and reducing noise pollution to the surrounding environment.

[0015] Secondly, embodiments of the present invention also provide a distribution transformer, including a multi-dimensional noise reduction clamping device.

[0016] The beneficial effects of the distribution transformer provided by this invention are as follows: Compared with the prior art, the distribution transformer of this invention integrates a multi-dimensional noise reduction clamping device. Through the coordinated design of the frame, clamping components, cam roller, and buffer drive mechanism, it significantly improves the clamping uniformity of the winding core, avoids winding core deformation and fatigue loosening of fastening points caused by local stress concentration, and suppresses potential hazards such as winding vibration and insulation wear caused by winding core loosening from the source. The buffer drive mechanism provides elastic torque to the cam roller to resist vibration from the winding core, which can significantly reduce the transmission efficiency of vibration energy to the distribution transformer tank, improve the winding core fastening stability, and reduce vibration noise. The distribution transformer integrating the multi-dimensional noise reduction clamping device can still maintain stable winding core fastening force and low vibration noise characteristics in an alternating magnetic field environment, significantly improving the reliability and economy of equipment operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation structure of the multi-dimensional noise reduction clamping device on the winding core provided in an embodiment of the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the multi-dimensional noise reduction clamping device provided in an embodiment of the present invention;

[0019] Figure 3This is a side view of the multi-dimensional noise reduction clamping device provided in an embodiment of the present invention.

[0020] Figure 4 for Figure 1 A partial view of region A in the middle.

[0021] In the diagram: 10. Frame; 11. Slide groove; 12. Slide rail; 20. Clamping assembly; 21. Clamping plate; 22. Buffer plate; 30. Cam roller; 40. Buffer drive mechanism; 50. Transmission assembly; 51. Slide rod; 511. Mounting plate; 52. Mounting bracket; 53. Rack; 54. Rotary gear; 60. Buffer assembly; 61. Buffer component; 611. Sliding plate; 612. Elastic component; 62. Fastener; 70. Winding core. Detailed Implementation

[0022] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0023] It should be noted that when an element is referred to as being "set on" another element, it can be directly on or indirectly on the other element. It should be understood that the terms "upper," "lower," "front," "rear," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the 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 invention. In the description of the invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] Please see Figure 1 The multi-dimensional noise reduction clamping device provided by the present invention will now be described. The multi-dimensional noise reduction clamping device includes a frame 10, a clamping assembly 20, two sets of cam rollers 30, and a buffer drive mechanism 40. The frame 10 has a space for accommodating the transformer winding. Two sets of clamping assemblies 20 are slidably arranged on the frame 10. The two sets of clamping assemblies 20 are respectively used to clamp the upper end and the lower end of the winding core 70. The two sets of cam rollers 30 are respectively rotatably arranged on the upper and lower parts of the frame 10. The two sets of cam rollers 30 are respectively used to roll one of the clamping assemblies 20 to clamp the winding core 70. The buffer drive mechanism 40 is arranged on the frame 10 and connected to the two sets of cam rollers 30, and is used to apply elastic torque to the two sets of cam rollers 30.

[0025] It should be noted that the frame 10 has a frame structure with internal space to accommodate the transformer windings. Two sets of sliding clamping assemblies 20 are respectively provided on its top and bottom walls. The clamping assemblies 20 can slide along the direction adapting to the deformation of the winding core 70, and are used to clamp the corresponding two side walls of the winding core 70. Unlike the single-point rigid fixation of traditional channel steel, the clamping assemblies 20 form a symmetrical clamping force from both ends of the core, resulting in a larger contact area and more uniform force distribution, avoiding deformation or breakage of the silicon steel sheets due to localized stress concentration. Both sets of cam rollers 30 are rotatably mounted on the frame 10. The outer contour of the cam rollers 30 has an eccentric structure, and when rotating, they can push the clamping assemblies 20 towards the core.

[0026] When the distribution transformer is in operation, the winding core 70 exhibits a periodic magnetostrictive phenomenon. This magnetostriction causes the winding core 70 to vibrate, generating a periodic outward pushing force against the clamping assembly 20. The clamping assembly 20 transmits this force to the cam roller 30, which rotates under the influence of the force. This effectively suppresses the transmission of vibration to the frame 10 and helps reduce vibration noise. The elastic torque provided by the buffer drive mechanism 40 to the cam roller 30 significantly reduces the transmission efficiency of vibration energy to the frame 10, minimizing the diffusion of vibration to other components. Unlike traditional channel steel bolt fixation, which is prone to loosening under vibration, this device can dynamically adjust in real time according to the vibration of the winding core 70, maintaining a stable clamping state and significantly improving the overall structural reliability during transformer operation. Simultaneously, the elastic torque of the buffer drive mechanism 40 also absorbs some vibration energy, reducing vibration and noise.

[0027] Compared with existing technologies, the multi-dimensional noise reduction clamping device provided by this invention has a frame 10 that provides space to accommodate the transformer windings, essentially acting as a frame around the transformer windings without altering their structural layout. The clamping components 20 are slidably connected to the frame 10 to meet the adjustment requirements of the clamping force. The two sets of clamping components 20 can form a distributed clamping of the winding core 70 from both the top and bottom. Compared with the traditional connection method of channel steel and bolts and nuts, this effectively avoids damage to the winding core 70 and fatigue loosening of the fasteners caused by local stress concentration. The two sets of cam rollers 30 obtain elastic torque through the buffer drive mechanism 40 and continuously act on the clamping components 20 in a dynamic rolling manner. When the winding core 70 vibrates periodically in the alternating magnetic field, the vibration is transmitted to the cam roller 30, thereby converting the oscillating motion of the winding core 70 into the rotational motion of the cam roller 30. This not only suppresses the transmission of vibration to the frame 10, but also helps to reduce vibration noise. The elastic torque brought by the buffer drive mechanism 40 to the cam roller 30 can significantly reduce the transmission efficiency of vibration energy to the frame 10 and reduce the diffusion of vibration to other components. At the same time, the elastic torque of the buffer drive mechanism 40 can also absorb some vibration energy. Under the dual effect, the noise generated during the operation of the device is significantly reduced, effectively improving the transformer operating environment and reducing noise pollution to the surrounding environment.

[0028] In conjunction with the first aspect, please refer to Figure 2 In one possible implementation, each set of cam rollers 30 includes two cam rollers 30; each set of clamping assemblies 20 includes two clamping plates 21 arranged opposite to each other, the two clamping plates 21 are used to clamp the winding core 70 and are located between the two cam rollers 30, and the two cam rollers 30 respectively roll against the side walls of the two clamping plates 21 that are opposite to each other; wherein, the two cam rollers 30 of each set are connected to the buffer drive mechanism 40 to obtain elastic torque.

[0029] It should be noted that the two cam rollers 30 respectively roll against the opposite sidewalls of the two clamping plates 21, applying symmetrical pushing force to the clamping plates 21 from both sides. The clamping plates 21 form a symmetrical clamping force on the winding core 70, which can effectively prevent the winding core 70 from tilting or shifting due to uneven force. Through symmetrical clamping and rolling, the deviation of the clamping force on both sides of the winding core 70 can be controlled within a very small range, so that the winding core 70 maintains a stable position during operation, improving the reliability and stability of the entire clamping device. The two clamping plates 21 cooperate to clamp the winding core 70, increasing the contact area with the winding core 70, so that the clamping force can be more evenly distributed on the surface of the winding core 70. The two cam rollers 30 respectively roll against the clamping plates 21, which can further ensure the uniform transmission of the clamping force on the clamping plates 21 and avoid the problem of local stress concentration. Compared with traditional clamping methods, this structure can effectively prevent deformation and damage to the winding core 70 and wear of insulation materials caused by excessive local pressure, thus extending the service life of the winding core 70 and related components, and also helping to maintain the normal performance and working efficiency of the transformer.

[0030] Each set of two cam rollers 30 is connected to the buffer drive mechanism 40. The elastic torque generated by the buffer drive mechanism 40 can be transmitted to each cam roller 30 simultaneously and evenly, reducing losses and deviations in the force transmission process, and enabling synchronous pushing of each cam roller 30. The synchronous rotation of each cam roller 30 pushes the clamping plate 21, making the force application more direct and efficient, improving the overall efficiency of the buffer drive mechanism 40, and ensuring that the cam rollers 30 can stably provide sufficient clamping force to the clamping plate 21 under various working conditions, maintaining the normal operation of the clamping device.

[0031] In some embodiments, please refer to Figure 2 and Figure 3 The buffer drive mechanism 40 includes a transmission assembly 50 and a buffer assembly 60. The transmission assembly 50 has a sliding connection end and multiple rotating connection ends. Each rotating connection end is connected to a corresponding cam roller 30. The sliding connection end is slidably connected to the frame 10. The transmission assembly 50 is used to convert the rotational motion of its rotating connection end into the linear motion of its sliding connection end. The buffer assembly 60 is disposed on the frame 10 and connected to the sliding connection end.

[0032] It should be noted that each rotary connection end is connected to a corresponding cam roller 30, and all are connected to the sliding connection end. The transmission assembly 50 can accurately convert the rotational motion of the cam roller 30 into the linear motion of the sliding connection end. This ensures that during transformer operation, as the core vibrates, the motion of the cam roller 30 is accurately transmitted to the sliding connection end. The buffer assembly 60 is connected to the sliding connection end. When the vibration of the winding core 70 causes the cam roller 30 to rotate and drive the sliding connection end to move linearly, the buffer assembly 60 connected to the sliding connection end can provide a buffering force to the sliding connection end. The buffer assembly 60 transmits the generated buffering force to each cam roller 30 through the sliding connection end and the rotary connection end, providing elastic torque to each cam roller 30. This allows each cam roller 30 to continuously act on the clamping assembly 20 in a dynamic rolling manner, reducing fatigue loosening of the fastening points caused by vibration and improving the overall performance and fastening reliability of the device.

[0033] The presence of the buffer assembly 60 enhances the adaptability and stability of the entire clamping device when faced with core vibration. The buffer assembly 60 also dissipates vibration energy transmitted by the winding core 70 to a certain extent, protecting other components from excessive vibration, extending the device's service life, and improving the reliability and safety of transformer operation.

[0034] For examples, please refer to Figure 3 The transmission assembly 50 includes a slide rod 51, two mounting brackets 52, and multiple rotating gears 54. The slide rod 51 is vertically slidably mounted on the frame 10 as a sliding connection end. The two mounting brackets 52 are respectively located at both ends of the slide rod 51, and racks 53 are vertically provided on the two opposite side walls of the two mounting brackets 52. Each rotating gear 54 serves as one of the rotating connection ends and is coaxially connected to each cam roller 30. Each rotating gear 54 is meshed with each rack 53 in a one-to-one correspondence.

[0035] It should be noted that the two mounting brackets 52 are located at both ends of the slide rod 51, and racks 53 are provided on both sides. Each rack 53 is meshed with a corresponding rotating gear 54. When the slide rod 51 moves vertically, it can drive each rack 53 to move simultaneously, thereby driving each cam roller 30 to move synchronously. The mounting brackets 52 and racks 53 at both ends of the slide rod 51 simultaneously drive the upper and lower sets of cam rollers 30, ensuring that the clamps 21 at the upper and lower ends of the winding core 70 move synchronously and preventing loosening on one side.

[0036] When the winding core 70 vibrates, it pushes the clamping plate 21, which in turn drives the cam rollers 30 to rotate through contact force. The rotating gear 54, coaxially connected to the cam rollers 30, rotates synchronously with them, and the rack 53 converts the rotational motion into the vertical sliding of the slide rod 51. The linear motion of the slide rod 51 compresses or stretches the buffer assembly 60, which absorbs vibration energy and generates a reaction force through elastic deformation. The reaction force of the buffer assembly 60 is transmitted back to the cam rollers 30 through the slide rod 51, rack 53, and rotating gear 54, adjusting the pushing force of the cam rollers 30 on the clamping plate 21, thus forming a closed-loop adjustment. By converting the lateral vibration of the core into the longitudinal motion of the slide rod 51, and storing and dissipating the vibration energy through the buffer assembly 60, vibration propagation can be effectively suppressed and noise reduced.

[0037] For examples, please refer to Figure 4 The slide bar 51 is provided with a mounting plate 511; the buffer assembly 60 includes two sets of buffer members 61 and two sets of fasteners 62; both sets of buffer members 61 are vertically slidably arranged on the frame 10 and are respectively connected to the upper and lower sides of the mounting plate 511; both sets of fasteners 62 are provided on the frame 10 and are respectively located on the side of the two sets of buffer members 61 away from the mounting plate 511, and the fasteners 62 are used to press the buffer members 61 against the mounting plate 511.

[0038] It should be noted that the mounting plate 511 is fixed to the slide rod 51 and serves as the connection hub for the buffer component 61. Two sets of buffer components 61 are located at the upper and lower ends of the mounting plate 511, respectively, and are slidably connected to the mounting plate 511 and the frame 10 at both ends. Two sets of fasteners 62 are located on the frame 10 and can preload the buffer components 61 using bolts or other structures to provide initial elastic force. Before the transformer operates, the pre-compression of the buffer components 61 can be adjusted using the fasteners 62, causing the two sets of buffer components 61 to generate initial elastic force, which is then transmitted to the slide rod 51 through the mounting plate 511 to provide pre-tightening torque to the cam roller 30. The fasteners 62 can be manually adjusted to change the pre-compression of the buffer components 61, thereby altering the magnitude of the initial elastic force: for lightly loaded transformers with less vibration, the pre-compression can be reduced to avoid excessive clamping and damage to the core; for heavily loaded transformers with severe vibration, the pre-compression can be increased to enhance the energy absorption capacity of the buffer assembly 60.

[0039] When the vibration of the winding core 70 causes the slide bar 51 to slide, one set of buffers 61 is further compressed and another set of buffers 61 is stretched. Together, they generate reverse resistance to suppress excessive movement of the slide bar 51. When the vibration weakens, the elastic restoring force of the buffers 61 pushes the slide bar 51 to reset, maintaining the stable roller pressure of the cam roller 30 on the clamping plate 21.

[0040] In conjunction with the first aspect, please refer to Figure 4In one possible implementation, the buffer 61 includes a sliding plate 611 and an elastic member 612; the sliding plate 611 is vertically slidably disposed on the frame 10 and abuts or rotates with the fastener 62; the elastic member 612 is disposed between the sliding plate 611 and the mounting plate 511.

[0041] It should be noted that the elastic element 612 can be a spring, a disc spring, or a damper, with a disc spring being the preferred choice. Disc springs store energy through the elastic deformation of their conical cross-section, resulting in a higher energy density. A disc spring of the same volume can absorb more vibrational energy, significantly enhancing the energy dissipation capacity of the buffer assembly 60. When the winding core 70 vibrates and causes the slide rod 51 to slide upwards, the two elastic elements 612 at the top of the mounting plate 511 absorb energy through compression deformation, while the two elastic elements 612 at the bottom of the mounting plate 511 store elastic potential energy through stretching. When the winding core 70 vibrates and causes the slide rod 51 to slide downwards, the two elastic elements 612 at the bottom of the mounting plate 511 absorb energy through compression deformation, while the two elastic elements 612 at the top of the mounting plate 511 store elastic potential energy through stretching. During the rebound process of the slide rod 51, the elastic elements 612 release the stored energy and continuously dissipate vibrational kinetic energy, thereby reducing vibration and noise.

[0042] In some embodiments, please refer to Figure 4 The frame 10 is provided with a slide groove 11, and the sliding plate 611 is slidably connected to the slide groove 11.

[0043] It should be noted that the vertical guiding effect of the slide groove 11 forces the sliding plate 611 to move only along the axial direction, completely restricting its lateral degree of freedom. This design ensures that the movement trajectory of the sliding plate 611 is strictly aligned with the axis of the slide rod 51, ensuring that the elastic elements 612, such as the disc spring, only bear axial loads, avoiding abnormal wear or failure of the elastic elements 612 due to lateral forces caused by misalignment. The slide groove 11 strictly limits the movement of the sliding plate 611 to the vertical direction, so that the vibration energy of the winding core 70 can only be transmitted to the frame 10 through the path of the slide rod 51, mounting plate 511, elastic element 612, and sliding plate 611, blocking ineffective lateral transmission paths. This prevents the vibration energy from spreading to other parts of the frame 10, ensuring that the buffer assembly 60 can concentrate and efficiently absorb and dissipate the vibration energy in the target direction, while reducing the attenuation of the buffering effect due to energy dispersion.

[0044] For examples, please refer to Figure 2 Multiple slide rails 12 are horizontally arranged at the top and bottom of the frame 10, and each clamping plate 21 is slidably connected to each slide rail 12.

[0045] It should be noted that the slide rails 12 at the top and bottom of the frame 10 provide bidirectional linear guidance for the clamping plate 21 of the clamping assembly 20, ensuring that the clamping plate 21 slides smoothly in the horizontal direction when clamping the winding core 70, avoiding skewing or displacement caused by unilateral force. This ensures that the clamping plate 21 and the side wall of the winding core 70 remain parallel and in close contact, significantly improving clamping stability and reducing vibration and noise caused by uneven contact. Multiple slide rails 12 are evenly distributed at the top and bottom of the frame 10, forming multi-point support for the clamping plate 21, distributing the clamping force to the frame 10, and avoiding local stress concentration caused by traditional single-point fixing. The connection between the clamping plate 21 and the slide rails 12 allows it to make slight sliding adjustments with the magnetostrictive vibration or thermal expansion and contraction of the core, adapting to changes in the size of the winding core 70 without manual intervention. When the winding core 70 is displaced due to vibration, the clamping plate 21 can move synchronously along the slide rail 12 to maintain effective clamping force and avoid bolt loosening or silicon steel sheet damage caused by rigid jamming.

[0046] In conjunction with the first aspect, please refer to Figure 1 In one possible implementation, the clamping surfaces of the two sets of clamping assemblies 20 for clamping the winding core 70 are provided with buffer plates 22.

[0047] It should be noted that the buffer plate 22 can be made of rubber, silicone, or elastic composite materials. The buffer plate 22 can form a flexible damping layer, converting the rigid mechanical force of the clamping plate 21 into the elastic deformation energy of the buffer material, effectively reducing the direct transmission path of vibration from the clamping assembly 20 to the cam roller 30. When the winding core 70 vibrates, the deformation of the buffer plate 22 allows the clamping assembly 20 to move slightly with the winding core 70, avoiding the sudden change in clamping force caused by displacement limitation in traditional rigid clamping.

[0048] The working principle of the multi-dimensional noise reduction clamping device provided by this invention can be divided into two stages: initial pre-tightening and operation adjustment. In the initial state, the elastic element 612 is pre-compressed by the fastener 62. The elastic force is transmitted to the slide rod 51 through the sliding plate 611, driving the cam roller 30 to rotate and press against the clamping plate 21 to form an initial clamping force, which stably clamps the winding core 70. When the winding core 70 vibrates due to magnetostriction, the clamping plate 21 pushes the cam roller 30 to rotate. Through the rotating gear 54 and the rack 53, the slide rod 51 moves, compressing one side of the elastic element 612 and stretching the other side of the elastic element 612. The deformation of the elastic element 612 absorbs the vibration energy and generates reverse resistance, which is fed back to the cam roller 30 to adjust the pushing force, forming a closed-loop control of vibration sensing, energy absorption, and clamping force adaptive adjustment, which suppresses vibration transmission and reduces noise.

[0049] Secondly, embodiments of the present invention also provide a distribution transformer, including a multi-dimensional noise reduction clamping device.

[0050] It should be noted that the slide rail 12 and clamping assembly 20 of the device can be modularly integrated into the top, bottom, and sides of the winding core 70, and fixed using the existing mounting holes of the winding core 70, without the need for large-scale modification of the transformer body structure. The top and bottom horizontal slide rail 12 is designed to naturally match the rectangular cross-section of the core, enabling multi-directional clamping within a limited space, which is particularly suitable for noise reduction retrofitting of compact distribution transformers. After the distribution transformer integrates the multi-dimensional noise reduction clamping device, through the deep integration of vibration control technology and mechanical structure, the clamping assembly 20 can quickly adjust the spacing by sliding along the slide rail 12, and can be used with replaceable cam rollers 30 to adapt to different specifications of winding cores 70; the pre-compression amount of the buffer 61 can be finely adjusted on-site through fasteners 62 to ensure that the clamping force matches the parameters of the winding core 70. This allows the same device to be compatible with multiple transformer models, improving product versatility and engineering application flexibility.

[0051] Compared with existing technologies, the distribution transformer provided by this invention integrates a multi-dimensional noise reduction clamping device. Through the coordinated design of the frame 10, clamping assembly 20, cam roller 30, and buffer drive mechanism 40, the clamping uniformity of the winding core 70 is significantly improved, avoiding deformation of the winding core 70 and fatigue loosening of fasteners caused by local stress concentration. This suppresses potential problems such as winding vibration and insulation wear caused by loosening of the winding core 70 from the source. The buffer drive mechanism 40 provides elastic torque to the cam roller 30 to resist vibration from the winding core 70, which can significantly reduce the transmission efficiency of vibration energy to the distribution transformer housing, improve the fastening stability of the winding core 70, and reduce vibration noise. The distribution transformer with integrated multi-dimensional noise reduction clamping device can maintain stable winding core 70 fastening force and low vibration noise characteristics even in alternating magnetic field environments, significantly improving the reliability and economy of equipment operation.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-dimensional noise reduction clamping device, characterized in that, include: The frame has space for accommodating transformer windings, and two sets of clamping assemblies are slidably arranged on the frame, the two sets of clamping assemblies being used to clamp the upper end and lower end of the winding core, respectively. Two sets of cam rollers are respectively rotatably disposed on the upper and lower parts of the frame. The two sets of cam rollers are respectively used to roll one of the clamping components so that the clamping components clamp the winding core. A buffer drive mechanism is mounted on the frame and connected to the two sets of cam rollers, used to apply elastic torque to the two sets of cam rollers.

2. The multi-dimensional noise reduction clamping device as described in claim 1, characterized in that, Each group of cam rollers includes two cam rollers; each group of clamping assemblies includes two clamping plates arranged opposite each other, the two clamping plates are used to clamp the winding core and are located between the two cam rollers, and the two cam rollers are respectively rolled against the side walls of the two clamping plates that are opposite to each other; wherein, the two cam rollers in each group are connected to the buffer drive mechanism to obtain the elastic torque.

3. The multi-dimensional noise reduction clamping device as described in claim 2, characterized in that, The buffer drive mechanism includes: The transmission assembly has a sliding connection end and multiple rotating connection ends, each of the rotating connection ends being connected to each of the cam rollers respectively, and the sliding connection end being slidably connected to the frame. The transmission assembly is used to convert the rotational motion of its rotating connection end into the linear motion of its sliding connection end. A buffer assembly is provided on the frame and connected to the sliding connection end.

4. The multi-dimensional noise reduction clamping device as described in claim 3, characterized in that, The transmission assembly includes: A sliding rod, serving as the sliding connection end, is vertically slidably mounted on the frame. Two mounting brackets are respectively disposed at both ends of the slide rod, and racks are vertically provided on the two opposite side walls of the two mounting brackets; Multiple rotating gears are respectively used as one of the rotating connecting ends and are coaxially connected to each of the cam rollers. Each of the rotating gears is respectively meshed with each of the racks.

5. The multi-dimensional noise reduction clamping device as described in claim 4, characterized in that, The slide bar is provided with a mounting plate; the buffer assembly includes two sets of buffer components and two sets of fasteners; both sets of buffer components are vertically slidably disposed on the frame and are respectively connected to the upper and lower sides of the mounting plate; both sets of fasteners are disposed on the frame and are respectively located on the side of the two sets of buffer components away from the mounting plate, and the fasteners are used to press the buffer components against the mounting plate.

6. The multi-dimensional noise reduction clamping device as described in claim 5, characterized in that, The buffer includes: A sliding plate is vertically slidably mounted on the frame and abuts against or rotates with the fasteners. An elastic element is disposed between the sliding plate and the mounting plate.

7. The multi-dimensional noise reduction clamping device as described in claim 6, characterized in that, The frame is provided with a sliding groove, and the sliding plate is slidably connected to the sliding groove.

8. The multi-dimensional noise reduction clamping device as described in claim 2, characterized in that, The top and bottom of the frame are both horizontally provided with multiple slide rails, and each of the clamping plates is slidably connected to each of the slide rails.

9. The multi-dimensional noise reduction clamping device as described in any one of claims 1-8, characterized in that, The two sets of clamping assemblies are equipped with buffer plates on the clamping surfaces used to clamp the winding core.

10. A distribution transformer, including the multi-dimensional noise reduction clamping device as described in any one of claims 1-9.

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