Three-column amorphous alloy dry-type traction rectifier transformer

Abstract

The utility model discloses a three -column type amorphous alloy dry type traction rectifier transformer, including transformer body, the transformer body includes three -column amorphous alloy core, it has N layer three -column iron core body, N is equal to or more than 2, upper yoke is set in the upside of three -column amorphous alloy core, lower yoke is set in the downside of three -column amorphous alloy core, N 1 insulating partition is set between two adjacent three -column iron core body, the bottom of insulating partition has the bending portion of transverse extension, two draw -in plate are set respectively in the both sides of three -column iron core body, and the lower part of draw -in plate has the bending portion of extending towards three -column iron core body direction, and N buffer pad plate is set respectively between the bending portion and three -column iron core body. The utility model can make transformer body horizontal type change vertical type three -column amorphous alloy core intact, and effectively protect fragile three -column amorphous alloy core.

Description

Technical Field

[0001] This utility model relates to the technical field of transformers, and in particular to a three-column amorphous alloy dry-type traction rectifier transformer. Background Technology

[0002] The application of amorphous alloy dry-type transformers in the rail transit field is becoming increasingly common. Currently, most amorphous dry-type transformers are mainly used in the distribution transformer field, while there are relatively few applications of amorphous alloy dry-type transformers in the traction rectifier transformer field. This is mainly because amorphous rectifier transformers have large capacities (generally 2500kVA / 2750kVA / 3000kVA / 3300kVA), high voltages (generally 33kV or 35kV), and large product sizes (generally a 2-layer 6-frame three-column structure, and even larger ones have a 3-layer 9-frame three-column structure).

[0003] Because both the high and low voltage windings of the traction rectifier transformer have a split structure, the overall height of the windings is relatively high. Furthermore, a three-limb amorphous alloy core is typically used. Compared to a five-limb amorphous alloy core, a three-limb amorphous alloy core is easier to manufacture into a tall structure. Additionally, the amorphous alloy strip is relatively fragile and prone to fragmentation under stress. This leads to the following problems in the manufacturing and handling processes:

[0004] Firstly, because amorphous traction rectifier transformers have a tall and slender structure and a high center of gravity, the stress structure is unstable. If there is a sudden acceleration during transportation or an earthquake or other sudden situation, the transformer may tip over.

[0005] Secondly, since amorphous alloy strips are relatively fragile and easily break when subjected to stress, they are generally produced horizontally and coiled after being erected. However, because the core is too large and too high, erection becomes a process problem, and improper control can lead to the collapse of the core.

[0006] Thirdly, because amorphous alloy strips are relatively fragile and easily break when subjected to stress, the internal low-voltage coil will generate a large electrodynamic force during short-circuit testing. If no limiting parts are added between the core and the low-voltage coil, the coil will shift. If the traditional method of applying silicone strips is used, the circular cross-section of the silicone strip and the line contact surface will cause local pressure concentration, which will cause the amorphous alloy strip to be subjected to extrusion pressure, resulting in damage to the strip. Utility Model Content

[0007] In order to overcome the above-mentioned technical defects, this utility model provides a three-column amorphous alloy dry traction rectifier transformer, which aims to solve at least one of the problems in the background art.

[0008] This utility model is implemented according to the following technical solution:

[0009] This utility model discloses a three-column amorphous alloy dry-type traction rectifier transformer, including a transformer body, the transformer body comprising:

[0010] A three-column amorphous alloy core has N layers of three-column core bodies, where N≥2;

[0011] The upper yoke is located on the upper side of the three-column amorphous alloy core;

[0012] The lower yoke is located on the underside of the three-column amorphous alloy core;

[0013] N-1 insulating partitions are disposed between two adjacent three-column cores, and the bottom of the insulating partitions has a laterally extending bend.

[0014] Two pull plates are respectively disposed on both sides of the three-column iron core, and the lower part of the pull plate has a bent portion extending toward the three-column iron core;

[0015] N buffer pads are respectively disposed between the bent part and the three-column iron core.

[0016] Compared with the prior art, this utility model provides a laterally extending bent section at the pull plate, which serves as a pressure-bearing support point when the transformer body is rotated from horizontal to vertical. This, along with the buffer pad, reduces the force on the three-column amorphous alloy core, ensuring that the three-column amorphous alloy core remains undamaged during the rotation of the transformer body from horizontal to vertical. At the same time, the buffer pad can reduce the vibration force on the three-column amorphous alloy core when handling the three-column amorphous alloy dry-type traction rectifier transformer, effectively protecting the fragile three-column amorphous alloy core.

[0017] In a preferred embodiment, the bottom of the insulating partition has a laterally extending bend.

[0018] In a preferred embodiment, the cushioning pad is made of a resilient cushioning material.

[0019] In a preferred embodiment, the pull plate has a horizontal side plate and three vertical side plates integrally connected to the horizontal side plate, the bent portion extends laterally from the bottom of the horizontal side plate, and the three vertical side plates are respectively aligned with the three vertical column portions of the three-column amorphous alloy core.

[0020] In a preferred embodiment, the pull plate has a circular hole, which serves as the injection point for epoxy resin.

[0021] In a preferred embodiment, the pull plate has a magnetic leakage groove.

[0022] In a preferred embodiment, a low-voltage coil and a high-voltage coil are wound sequentially around the outer periphery of the three-column amorphous alloy core from the inside out, and a support plate is provided between the three-column amorphous alloy core and the low-voltage coil; the support plate is provided between the pull plate and the low-voltage coil.

[0023] In a preferred embodiment, the support plate is formed by bonding two epoxy glass cloth plates and a silicone plate together; wherein the silicone plate is located between the two epoxy glass cloth plates.

[0024] In a preferred embodiment, the three-column amorphous alloy dry-type traction rectifier transformer further includes a support frame, which has a structure that is wider at the bottom and narrower at the top. The transformer body is connected to the support frame and is located within the support frame.

[0025] In a preferred embodiment, the cross-section of the support frame is an isosceles trapezoidal structure. Attached Figure Description

[0026] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0027] Figure 1 This is a front view schematic diagram of the three-column amorphous alloy core and pull plate of this utility model;

[0028] Figure 2 This is a side view of the three-column amorphous alloy core, tie plate, and insulating partition of this utility model.

[0029] Figure 3 This is a top view of the transformer body of this utility model;

[0030] Figure 4 This is a structural schematic diagram of the support plate of this utility model;

[0031] Figure 5 This is a schematic diagram of the structure connecting the transformer body and the support frame of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100-Transformer body, 110-Three-column amorphous alloy core, 111-Three-column core body, 120-Insulating partition, 130-Pull plate, 131-Horizontal side plate, 132-Vertical side plate, 133-Round hole, 134-Leakage groove, 140-Buffer pad, 150-Bending part, 160-Low voltage coil, 170-High voltage coil, 180-Support plate, 181-Epoxy glass cloth plate, 182-Silicone plate, 191-Upper yoke, 192-Lower yoke, 200-Support frame. Detailed Implementation

[0034] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0035] To better illustrate this utility model, a further detailed description of this utility model is provided below with reference to the accompanying drawings.

[0036] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0037] See Figures 1 to 5 This utility model discloses a three-column amorphous alloy dry-type traction rectifier transformer, including a transformer body 100, wherein the transformer body 100 includes:

[0038] The three-column amorphous alloy core 110 has N layers of three-column core bodies 111, where N ≥ 2, and N is preferably 2 and 3.

[0039] Upper yoke 191, which is disposed on the upper side of the three-column amorphous alloy core 110;

[0040] The lower yoke 192 is disposed on the lower side of the three-column amorphous alloy core 110;

[0041] N-1 insulating partitions 120 are disposed between two adjacent three-column core bodies 111, and the bottom of the insulating partition 120 has a laterally extending bent portion 150.

[0042] Two pull plates 130 are respectively disposed on both sides of the three-column iron core 111, and the lower part of the pull plate 130 has a bent portion 150 extending toward the three-column iron core 111.

[0043] N buffer pads 140 are respectively disposed between the bent portion 150 and the three-column iron core 111.

[0044] Compared with the prior art, this utility model provides a laterally extending bending portion 150 at the pull plate 130, which serves as a pressure-bearing support point when the transformer body 100 is rotated from horizontal to vertical. Together with the buffer pad 140, it reduces the force on the three-column amorphous alloy core 110, ensuring that the three-column amorphous alloy core 110 remains undamaged when the transformer body 100 is rotated from horizontal to vertical. At the same time, the buffer pad 140 can reduce the vibration force on the three-column amorphous alloy core 110 when transporting the three-column amorphous alloy dry-type traction rectifier transformer, effectively protecting the fragile three-column amorphous alloy core 110.

[0045] The three-column amorphous alloy core shown in the attached diagram of the instruction manual is a 2-layer, 6-frame structure with N=2.

[0046] In one embodiment, see Figure 2 The bottom of the insulating partition 120 has a laterally extending bent portion 150, which can provide multi-point support for the buffer pad 140, expand the force-bearing area, and make the buffer pad 140 more evenly stressed.

[0047] In one embodiment, see Figure 2 The buffer pad 140 is made of elastic buffer material, such as rubber or silicone, which can absorb the impact and vibration energy generated during the horizontal to vertical transformation of the transformer and during transportation through its own deformation, significantly reducing the mechanical stress transmitted to the three-column amorphous alloy core 110.

[0048] In one embodiment, see Figure 1 The pull plate 130 has a horizontal side plate 131 and three vertical side plates 132 integrally connected to the horizontal side plate 131. The bent portion 150 extends laterally from the bottom of the horizontal side plate 131, and the three vertical side plates 132 are respectively aligned with the three vertical columns of the three-column amorphous alloy core 110. The alignment of the three vertical side plates 132 with the three columns of the core ensures a uniform distribution of clamping force, avoiding local deformation or cracking of the amorphous alloy core due to uneven force. In addition, the integrated pull plate 130 structure reduces the number of parts, lowers manufacturing costs, and improves assembly efficiency.

[0049] In one embodiment, see Figure 1 The pull plate 130 has a circular hole 133, which serves as the injection point for epoxy resin. After the epoxy resin cures, it forms a rigid support, firmly connecting the pull plate 130 and the three-column amorphous alloy core 110 into a whole, thereby improving the vibration and impact resistance.

[0050] In one embodiment, see Figure 1 The pull plate 130 has a magnetic leakage groove 134, which can effectively suppress magnetic leakage and meet electrical performance requirements.

[0051] In one embodiment, see Figure 3 The three-column amorphous alloy core 110 has a low-voltage coil 160 and a high-voltage coil 170 wound sequentially from the inside out around its outer periphery. A support plate 180 is provided between the three-column amorphous alloy core 110 and the low-voltage coil 160; the support plate 180 is also provided between the pull plate 130 and the low-voltage coil 160. By providing the support plate 180, the electrodynamic force exerted by the low-voltage coil 160 on the three-column amorphous alloy core 110 can be buffered, the force-bearing area of ​​the three-column amorphous alloy core 110 can be increased, and the stress on the amorphous alloy core can be reduced to a lower level; it can also reduce the vibration between the three-column amorphous alloy core 110 and the low-voltage coil 160, thereby reducing noise.

[0052] Further, see Figure 4 The support plate 180 is formed by bonding two epoxy glass cloth boards 181 and one silicone plate 182; wherein the silicone plate 182 is located between the two epoxy glass cloth boards 181. The epoxy glass cloth boards 181, as the outer layer material, provide high-strength mechanical support, resisting compressive forces and vibration impacts between the coil and the iron core, ensuring the stability of the support structure. The silicone plate 182, as the intermediate elastic layer, absorbs energy through deformation, buffering dynamic loads between the three-column amorphous alloy iron core 110 and the coil, such as vibrations during vertical switching or transportation impacts.

[0053] In one embodiment, see Figure 5 The three-column amorphous alloy dry-type traction rectifier transformer also includes a support frame 200, which has a structure that is wider at the bottom and narrower at the top. The transformer body 100 is connected to the support frame 200 and located within the support frame 200. The design of the support frame 200, which is wider at the bottom and narrower at the top, significantly lowers the overall center of gravity of the transformer, improves its stability in a vertical position, and effectively prevents the risk of equipment tipping over due to vibration, tilting, or transportation impact.

[0054] Further, see Figure 5 The cross-section of the support frame 200 is an isosceles trapezoid. The two sides of the isosceles trapezoid are symmetrical, which makes the support frame 200 uniformly stressed in all directions, avoids local stress concentration caused by uneven external forces, and further improves the structural stability.

[0055] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A three-limb amorphous alloy dry-type traction rectifier transformer, comprising a transformer body, characterized in that, The transformer body includes: A three-column amorphous alloy core has N layers of three-column core bodies, where N≥2; The upper yoke is located on the upper side of the three-column amorphous alloy core; The lower yoke is located on the underside of the three-column amorphous alloy core; N-1 insulating partitions are disposed between two adjacent three-column iron cores; Two pull plates are respectively disposed on both sides of the three-column iron core, and the lower part of the pull plate has a bent portion extending toward the three-column iron core; N buffer pads are respectively disposed between the bent part and the three-column iron core.

2. The three-column amorphous alloy dry-type traction rectifier transformer according to claim 1, characterized in that: The bottom of the insulating partition has a laterally extending bend.

3. The three-column amorphous alloy dry-type traction rectifier transformer according to claim 1, characterized in that: The cushioning pad is made of an elastic cushioning material.

4. The three-column amorphous alloy dry-type traction rectifier transformer according to claim 1, characterized in that: The pull plate has a horizontal side plate and three vertical side plates integrally connected to the horizontal side plate. The bent portion extends laterally from the bottom of the horizontal side plate, and the three vertical side plates are respectively aligned with the three vertical columns of the three-column amorphous alloy core.

5. The three-column amorphous alloy dry-type traction rectifier transformer according to claim 1, characterized in that: The pull plate has a circular hole, which serves as the injection point for epoxy resin.

6. The three-limb amorphous alloy dry-type traction rectifier transformer according to claim 1, characterized in that: The pull plate has a magnetic leakage groove.

7. The three-limb amorphous alloy dry-type traction rectifier transformer according to claim 1, characterized in that: The outer circumference of the three-column amorphous alloy core is wound with a low-voltage coil and a high-voltage coil sequentially from the inside out. A support plate is provided between the three-column amorphous alloy core and the low-voltage coil; The support plate is provided between the pull plate and the low-voltage coil.

8. The three-column amorphous alloy dry-type traction rectifier transformer according to claim 7, characterized in that: The support plate is made of two epoxy glass cloth boards and one silicone board bonded together; wherein the silicone board is located between the two epoxy glass cloth boards.

9. The three-column amorphous alloy dry-type traction rectifier transformer according to claim 1, characterized in that: The three-column amorphous alloy dry-type traction rectifier transformer also includes a support frame, which has a structure that is wider at the bottom and narrower at the top. The transformer body is connected to the support frame and is located within the support frame.

10. The three-column amorphous alloy dry-type traction rectifier transformer according to claim 9, characterized in that: The cross-section of the support frame is an isosceles trapezoidal structure.

Images