A high-frequency transformer vibration noise testing device

Abstract

This utility model discloses a high-frequency transformer vibration and noise testing device, including a test platform with a cavity for placing the high-frequency transformer inside. Vibration sensors and noise sensors are fixed at both ends of the top of the test platform, respectively. A base is fixed to one side of the test platform, and a base plate supporting the high-frequency transformer is provided above the base. A drive assembly for driving the high-frequency transformer is installed in the middle of the base plate. A clamping plate for pressing the top of the high-frequency transformer is provided on the top of the test platform. This utility model reduces resonance between the high-frequency transformer and the support or clamping components by setting a soft connection structure between the base plate and the bottom of the clamping plate, thereby reducing additional vibration and noise. This makes the signals collected by the vibration and noise sensors closer to the actual working state of the transformer, which is beneficial for more accurate identification of vibration and noise sources.

Description

Technical Field

[0001] This utility model relates to the field of transformer performance testing technology, specifically a high-frequency transformer vibration and noise testing device. Background Technology

[0002] High-frequency transformer noise is mainly caused by a combination of factors, including electromagnetic force, magnetostriction effect, mechanical structure, and resonance. Excessive vibration can lead to mechanical damage such as loose windings and core displacement. Long-term operation may cause faults such as short circuits and insulation aging. By testing and locating the source of vibration noise, the core clamping method can be improved in a targeted manner, and potential problems can be identified in advance.

[0003] Traditional testing often involves placing the high-frequency transformer on the ground or a base and using a noise sensor to measure it. However, because the transformer is in rigid contact with the base during testing, this can cause resonance between the transformer and the base, affecting the accuracy of the actual vibration data. Furthermore, the resonance generates additional noise, which, combined with the transformer's own noise, affects the accuracy of the noise test. Utility Model Content

[0004] The purpose of this invention is to provide a high-frequency transformer vibration and noise testing device. By setting a soft connection structure to replace the traditional rigid contact, the resonance between the high-frequency transformer and the base plate or clamping plate is reduced. At the same time, with the help of adjustment structure, conveying roller and other components, the accuracy of vibration and noise testing is improved while the operation is more convenient.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-frequency transformer vibration and noise testing device, comprising a test platform, a cavity for placing a high-frequency transformer inside the test platform, a vibration sensor and a noise sensor respectively fixed at both ends of the top of the test platform, a base fixed on one side of the test platform, a base plate for supporting the high-frequency transformer above the base, a drive assembly for driving the high-frequency transformer to work installed in the middle of the base plate, a clamping plate for pressing the top of the high-frequency transformer on the top of the test platform, and soft connection structures for reducing resonance between the high-frequency transformer and the base plate or clamping plate installed above the base plate and at the bottom of the clamping plate.

[0006] Preferably, the flexible connection structure includes springs, which are arranged in a flat ring shape. The bottom of four sets of springs are fixedly connected to the base plate by screws, and the top of the other four sets of springs are fixedly connected to the pressure plate by screws. Gaskets are glued between the springs and the pressure plate and between the springs and the base plate. The upper and lower surfaces of the high-frequency transformer abut against the upper surfaces of four sets of springs and the lower surfaces of the other four sets of springs, respectively.

[0007] Preferably, the flexible connection structure further includes an adjustment structure capable of driving the pressure plate to move downward;

[0008] The adjustment structure includes a screw, the bottom end of which is rotatably connected to the upper surface of the pressure plate via a rotating shaft, the top of which passes through the top of the test bench and is threadedly connected to the test bench, and a knob is fixed to the top of the screw.

[0009] Preferably, the adjustment structure further includes guide rods for guiding the longitudinal movement of the pressure plate. At least two sets of guide rods are provided. The bottom end of the guide rod is fixedly connected to the pressure plate, and the top end of the guide rod passes through the top of the test platform and is slidably connected to the test platform.

[0010] Preferably, the drive assembly includes a drive plate fixed to the top of the base plate by screws, and the upper surface of the drive plate is provided with a plurality of connectors, which are electrically connected to the high-frequency transformer via cables.

[0011] Preferably, the high-frequency transformer vibration and noise testing device further includes a conveyor roller that assists the base plate to enter the cavity. A fixing plate is fixed at the bottom of the inner cavity of the test platform. Grooves are provided above the fixing plate and above the base. The conveyor roller is rotatably connected to the groove through a rotating shaft.

[0012] Preferably, the test platform has viewing windows on both sides, a guide post is fixed in the inner cavity of the test platform, and guide holes for inserting the guide post are provided at both ends of the base plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model reduces the resonance phenomenon between the high-frequency transformer and the support or pressing components by setting a soft connection structure above the base plate and at the bottom of the pressing plate, thereby reducing the generation of additional vibration and noise. This makes the signals collected by the vibration sensor and noise sensor closer to the actual working state of the transformer, which is beneficial for more accurate identification of vibration and noise sources in the future.

[0015] 2. The adjustment component in the soft connection structure of this utility model can drive the clamping plate to move longitudinally, so that the high-frequency transformer is pressed from top to bottom. The bottom of the machine base and the test bench cavity is equipped with a conveying roller, which can assist the base plate carrying the transformer to enter the cavity, so that the heavy high-frequency transformer can be easily tested. Attached Figure Description

[0016] Figure 1 This is an isometric drawing of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the test bench of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the base plate of this utility model after it has been moved and placed inside the test bench;

[0019] Figure 4 This is a schematic diagram showing the position of the guide hole at one end of the base plate of this utility model.

[0020] In the diagram: 1. Test bench; 2. Cavity; 3. Vibration sensor; 4. Noise sensor; 5. Base; 6. Base plate; 7. Drive assembly; 8. Pressure plate; 9. Flexible connection structure;

[0021] 901. Spring; 902. Screw; 903. Knob; 904. Guide rod; 905. Washer;

[0022] 701. Driver board; 702. Connector;

[0023] 10. Conveyor roller; 11. Fixing plate; 12. Groove; 13. Viewing window; 14. Guide post; 15. Guide hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a high-frequency transformer vibration and noise testing device, including a test platform 1, a cavity 2 for placing a high-frequency transformer inside the test platform 1, a vibration sensor 3 and a noise sensor 4 respectively fixed at both ends of the top of the test platform 1, the cavity 2 forming a relatively independent test space to avoid environmental noise interfering with the sensor data collection, since the test platform 1 is semi-enclosed, the test space requires the distance between the high-frequency transformer and the cavity 2 wall to be greater than half a meter to avoid the transformer vibration directly contacting the cavity wall and causing secondary interference.

[0026] Vibration sensor 3 and noise sensor 4 respectively collect vibration and noise signals during transformer operation; their acquisition principles are existing technologies and will not be elaborated further. A base 5 is fixed to one side of the test bench 1. A base plate 6 supporting the high-frequency transformer is installed above the base 5. A drive assembly 7 for driving the high-frequency transformer is installed in the middle of the base plate 6. The base 5 supports the base plate 6, and the base plate 6 carries the high-frequency transformer. The drive assembly 7 provides power to the transformer via electrical connection, enabling it to enter normal operating condition. A clamping plate 8 for pressing the top of the high-frequency transformer is installed on the top of the test bench 1. Soft connection structures 9 are installed above the base plate 6 and at the bottom of the clamping plate 8 to reduce resonance between the high-frequency transformer and the base plate 6 or clamping plate 8. The clamping plate 8 fixes the transformer from the top, and the soft connection structure 9 replaces rigid contact, absorbing some vibration energy and reducing resonance between the transformer and the base plate 6 and clamping plate 8.

[0027] The flexible connection structure 9 includes spring pieces 901, which are arranged in a flat ring shape. The bottoms of four sets of spring pieces 901 are fixedly connected to the base plate 6 by screws, and the tops of the other four sets of spring pieces 901 are fixedly connected to the clamping plate 8 by screws. Gaskets 905 are glued between the spring pieces 901 and the clamping plate 8, and between the spring pieces 901 and the base plate 6. The upper and lower surfaces of the high-frequency transformer abut against the upper surfaces of four sets of spring pieces 901 and the lower surfaces of the other four sets of spring pieces 901, respectively. The flat ring spring pieces 901 have elastic deformation capability. The four sets of spring pieces 901 correspond to the upper and lower surfaces of the transformer, and are connected to the base plate 6 and the clamping plate 8 by screws. Figure 2 As shown, the high-frequency transformer is placed on the spring piece 901 above the base plate 6 by its own weight. After being pushed into the test bench 1, it is pressed by the spring piece 901 at the bottom of the clamping plate 8 before it starts working.

[0028] The gasket 905 is made of flexible rubber or damping pad to reduce the vibration transmission between the spring 901 and the plate. The screw passes through the spring 901 and then through the gasket 905 to connect with the base plate 6 or the clamping plate 8. After the gasket 905 is glued to the base plate 6 or the clamping plate 8, it is clamped between the spring 901 and the base plate 6.

[0029] The flexible connection structure 9 also includes an adjustment structure that can drive the pressure plate 8 to move downward;

[0030] The adjustment structure includes a screw 902, the bottom end of which is rotatably connected to the upper surface of the pressure plate 8 via a rotating shaft. The top of the screw 902 passes through the top of the test bench 1 and is threadedly connected to it. A knob 903 is fixed to the top of the screw 902. Rotating the knob 903 drives the screw 902 to rotate, which is converted into longitudinal movement of the screw 902 through threaded transmission, thereby driving the pressure plate 8 to adjust up and down. The guide rod 904 restricts the direction of movement of the pressure plate 8, ensuring that it moves smoothly only longitudinally and avoiding deviation during adjustment.

[0031] The adjustment structure also includes guide rods 904 that guide the longitudinal movement of the pressure plate 8. At least two sets of guide rods 904 are provided. The bottom end of the guide rod 904 is fixedly connected to the pressure plate 8, and the top end of the guide rod 904 passes through the top of the test platform 1 and is slidably connected to the test platform 1.

[0032] The drive assembly 7 includes a drive plate 701 fixed to the top of the base plate 6 by screws. The upper surface of the drive plate 701 is provided with several connectors 702, which are electrically connected to a high-frequency transformer via cables. The drive plate 701 is a drive circuit board, electrically connected to the connectors 702. The connectors 702 are connected to the transformer terminals via cables. The circuit board driving the transformer is existing technology and will not be described further.

[0033] The high-frequency transformer vibration and noise testing device also includes a conveyor roller 10 that helps the base plate 6 enter the cavity 2. A fixing plate 11 is fixed to the bottom of the inner cavity of the test platform 1. Grooves 12 are provided above the fixing plate 11 and above the base 5. The conveyor roller 10 is rotatably connected to the groove 12 via a rotating shaft. The conveyor roller 10 can rotate around the rotating shaft. When the base plate 6 is placed on the conveyor roller 10, the rolling friction reduces the moving resistance, making it easier to push the base plate 6 carrying the transformer into the cavity 2.

[0034] The test bench 1 has viewing windows 13 on both sides, and guide posts 14 are fixed inside the cavity of the test bench 1. Guide holes 15 are provided at both ends of the base plate 6 for inserting the guide posts 14. The viewing windows 13 facilitate observation of the transformer's operating status inside the cavity 2. The guide posts 14 are inserted into the guide holes 15 to provide positioning for the base plate 6 to enter the cavity 2. The guide holes 15 do not completely penetrate the base plate 6; when the base plate 6 is pushed into the cavity 2, it continues until the base plate 6 contacts the guide posts 14.

[0035] When in use, place the high-frequency transformer on the base plate 6 above the base 5, so that its upper and lower surfaces are pressed against the spring pieces 901 at the bottom of the base plate 6 and the clamping plate 8 respectively. Connect the terminals of the high-frequency transformer to the connectors 702 of the drive assembly 7 on the base plate 6 through the cable to complete the power supply line construction.

[0036] The base plate 6 carrying the transformer is pushed smoothly into the cavity 2 of the test bench 1 by the conveying roller 10 on the fixed plate 11 inside the base 5 and the cavity 2 of the test bench 1. During the pushing process, the guide holes 15 at both ends of the base plate 6 are inserted into the guide post 14 inside the cavity 2 until the base plate 6 touches the guide post 14 and the base plate 6 stops under the weight of the transformer itself.

[0037] Rotate the knob 903 on the top of the test bench 1 to drive the screw 902 to rotate, and observe through the viewing window 13 tube. Use the threaded transmission to drive the clamping plate 8 to move downward, so that the clamping plate 8 presses down from above the transformer, and the spring piece 901 contacts the top of the transformer.

[0038] Start the drive assembly 7 to power the high-frequency transformer through the drive board 701 and connector 702, so that it enters the normal working state. The vibration sensor 3 and noise sensor 4 on the top of the test bench 1 are activated to collect the vibration signal and noise signal of the transformer when it is working.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-frequency transformer vibration and noise testing device, characterized in that: The test platform (1) includes a cavity (2) for inserting a high-frequency transformer. Vibration sensors (3) and noise sensors (4) are fixed at both ends of the top of the test platform (1). A base (5) is fixed on one side of the test platform (1). A base plate (6) is provided above the base plate (5) to support the high-frequency transformer. A drive assembly (7) for driving the high-frequency transformer is installed in the middle of the base plate (6). A clamping plate (8) for pressing the top of the high-frequency transformer is provided on the top of the test platform (1). A soft connection structure (9) for reducing resonance between the high-frequency transformer and the base plate (6) or the clamping plate (8) is installed above the base plate (6) and at the bottom of the clamping plate (8).

2. The high-frequency transformer vibration and noise testing device according to claim 1, characterized in that: The flexible connection structure (9) includes spring pieces (901), which are arranged in a flat ring shape. The bottom of four sets of spring pieces (901) are fixedly connected to the base plate (6) by screws, and the top of the other four sets of spring pieces (901) are fixedly connected to the pressure plate (8) by screws. Gaskets (905) are glued between the spring pieces (901) and the pressure plate (8) and between the spring pieces (901) and the base plate (6). The upper and lower surfaces of the high-frequency transformer are respectively pressed against the upper surfaces of four sets of spring pieces (901) and the lower surfaces of the other four sets of spring pieces (901).

3. The high-frequency transformer vibration and noise testing device according to claim 2, characterized in that: The flexible connection structure (9) also includes an adjustment structure that can drive the pressure plate (8) to move downward; The adjustment structure includes a screw (902), the bottom end of which is rotatably connected to the upper surface of the pressure plate (8) via a rotating shaft, the top of which penetrates the top of the test bench (1) and is threadedly connected to the test bench (1), and a knob (903) is fixed on the top of the screw (902).

4. The high-frequency transformer vibration and noise testing device according to claim 3, characterized in that: The adjustment structure also includes a guide rod (904) for guiding the longitudinal movement of the pressure plate (8). There are at least two sets of the guide rod (904). The bottom end of the guide rod (904) is fixedly connected to the pressure plate (8), and the top end of the guide rod (904) passes through the top of the test bench (1) and is slidably connected to the test bench (1).

5. The high-frequency transformer vibration and noise testing device according to claim 4, characterized in that: The drive assembly (7) includes a drive plate (701) fixed above the base plate (6) by screws. The upper surface of the drive plate (701) is provided with a plurality of connectors (702), which are electrically connected to the high-frequency transformer via cables.

6. The high-frequency transformer vibration and noise testing device according to claim 5, characterized in that: The high-frequency transformer vibration and noise testing device also includes an auxiliary base plate (6) that enters the cavity (2) and a conveyor roller (10). A fixing plate (11) is fixed at the bottom of the inner cavity of the test platform (1). Grooves (12) are provided above the fixing plate (11) and above the base (5). The conveyor roller (10) is rotatably connected to the groove (12) through a rotating shaft.

7. The high-frequency transformer vibration and noise testing device according to claim 1, characterized in that: The test platform (1) is provided with viewing windows (13) on both sides, and the inner cavity of the test platform (1) is fixed with guide posts (14). The bottom plate (6) is provided with guide holes (15) at both ends for the guide posts (14) to be inserted.

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