Improved 40KVA power frequency three-phase transformer

Abstract

The invention relates to an improved 40KVA power frequency three-phase transformer, and relates to the technical field of transformers, the improved 40KVA power frequency three-phase transformer comprises a transformer body, the transformer body comprises a base and a magnetic core arranged on the upper surface of the base, and the upper surface of the base is further provided with a magnetic core clamp used for fixing the magnetic core on the upper surface of the base; three windings are wound on the surface of the magnetic core, winding shells are arranged on the outer surfaces of the windings, a gradient magnetic conductivity filling layer is arranged between the windings and the magnetic core, and the gradient magnetic conductivity filling layer is sequentially made of a high-magnetic conductivity material and a composite material from inside to outside. According to the 40KVA power frequency three-phase transformer, the gradient magnetic conductivity filling layer is arranged between the winding and the magnetic core, so that the 40KVA power frequency three-phase transformer can realize concentrated magnetic flux and synchronous optimization of heat dissipation and magnetic leakage suppression in the actual use process, the efficiency of the 40KVA power frequency three-phase transformer is effectively improved, meanwhile, the heat dissipation efficiency is improved, the problem of magnetic leakage is solved, and the service life of the 40KVA power frequency three-phase transformer is prolonged. And the electromagnetic coupling efficiency is ensured.

Description

Technical Field

[0001] This application relates to the technical field of transformers, and in particular to an improved 40KVA power frequency three-phase transformer. Background Art

[0002] The 40kV power frequency three-phase transformer belongs to the field of medium and high voltage power transmission, distribution and industrial energy management, and is a core device for realizing efficient conversion and distribution of electric energy in the power grid system and industrial facilities. Its design follows international standards such as IEC60076, is applicable to the 50 / 60Hz power frequency environment, and focuses on solving problems such as voltage level adaptation, power quality optimization and stability under complex working conditions.

[0003] Currently, the existing power frequency three-phase transformers usually adopt a concentric winding structure, with the low-voltage winding close to the iron core and the high-voltage winding on the outer layer. Its magnetic core is mostly laminated from silicon steel sheets, and there are the following defects in the actual use process: Hysteresis loss and eddy current loss: The traditional silicon steel sheet / laminated design of silicon steel sheets is prone to local magnetic saturation under high load, resulting in a decrease in efficiency; Low heat dissipation efficiency: The heat conduction performance of the air gap between the winding and the iron core is poor, and the temperature rise problem is significant; Leakage flux problem: The existing structure has insufficient suppression of leakage flux, affecting the electromagnetic coupling efficiency.

[0004] Therefore, the present invention provides an improved 40KVA power frequency three-phase transformer. Summary of the Invention

[0005] The purpose of this application is to provide an improved 40KVA power frequency three-phase transformer.

[0006] In the first aspect, an improved 40KVA power frequency three-phase transformer provided by this application adopts the following technical solutions: An improved 40KVA power frequency three-phase transformer includes a transformer body, the transformer body includes a base, and a magnetic core disposed on the upper surface of the base. A magnetic core clamp for fixing the magnetic core on the upper surface of the base is further disposed on the upper surface of the base. Three windings are wound around the surface of the magnetic core, a winding housing is disposed on the outer surface of the windings, and a gradient magnetic permeability filling layer is disposed between the windings and the magnetic core. The gradient magnetic permeability filling layer sequentially adopts a high magnetic permeability material and a composite material from the inside to the outside.

[0007] Preferably, the type of the high magnetic permeability material is iron-silicon-aluminum alloy powder, and its magnetic permeability is greater than 5000 to achieve concentrated magnetic flux.

[0008] By adopting the above technical solutions, concentrated magnetic flux can be achieved, effectively improving the operating efficiency of the transformer body.

[0009] Preferably, the composite material is a nano-aluminum oxide composite material with low magnetic permeability and high thermal conductivity, and its thermal conductivity is greater than or equal to 5 W / m·K, so as to realize synchronous optimization of heat dissipation and magnetic leakage suppression.

[0010] By adopting the above technical solution, on the one hand, effective heat dissipation can be realized, improving the heat dissipation efficiency, and on the other hand, magnetic leakage can be suppressed, ensuring the electromagnetic coupling efficiency of the transformer body.

[0011] Preferably, the winding is divided into a low-voltage winding and a high-voltage winding, and the low-voltage winding is divided into two groups, which are respectively wound on the upper half and the lower half of the magnetic core. The high-voltage winding is wound spirally on the outside of the low-voltage winding, and micro-channel heat sinks are embedded in the layers.

[0012] By adopting the above technical solution, an interleaved winding topology is adopted to further improve the heat dissipation efficiency and operating efficiency of the transformer body.

[0013] Preferably, two symmetric mounting plates are arranged at the top of the magnetic core fixture. On the surface of one mounting plate, an input-side phase A outlet terminal, an input-side phase B outlet terminal, an input-side phase C outlet terminal, and an input-side phase D outlet terminal are sequentially arranged through bolts. On the surface of the other mounting plate, an input-side phase A inlet terminal, an input-side phase B inlet terminal, an input-side phase C inlet terminal, and an input-side phase D inlet terminal are sequentially arranged through bolts.

[0014] By adopting the above technical solution, it is convenient to wire the transformer body.

[0015] In the second aspect, an improved 40KVA industrial frequency three-phase transformer provided by the present application adopts the following technical solution: A moving mechanism is arranged at the bottom of the transformer body. The moving mechanism includes a moving box fixedly arranged on the lower surface of the base through bolts. An I-shaped plate is slidably arranged on the inner wall of the moving box, and four moving wheels are arranged in a rectangular array on the lower surface of the I-shaped plate. Four rectangular openings corresponding to the four moving wheels are opened on the inner bottom wall of the moving box. Rubber anti-slip pads are fixedly arranged at the four corners of the lower surface of the moving box. The moving mechanism further includes a driving motor arranged on the upper surface of the moving box for driving the I-shaped plate to automatically lift.

[0016] By adopting the above technical solution, the driving motor can be used to drive the I-shaped plate to move up and down, thereby driving the moving wheels to lift the moving box and the transformer body, achieving the purpose of facilitating the movement of the transformer body.

[0017] Preferably, the output end of the driving motor is fixedly provided with a vertical threaded column extending into the moving box and rotatably connected to the inner bottom wall of the moving box, and a threaded hole threadedly connected to the outer surface of the vertical threaded column is opened on the upper surface of the I-shaped plate; Two limiting rods are symmetrically and fixedly arranged on the inner top wall and the inner bottom wall of the moving box, and first sliding holes which are respectively slidably connected with the surfaces of the two limiting rods are formed in the upper surface of the I-shaped plate.

[0018] By adopting the above technical solution, the rotation of the vertical threaded column can drive the I-shaped plate to automatically lift, and at the same time, when the I-shaped plate is lifting, the stability of the movement of the I-shaped plate can be effectively ensured under the action of the limiting rods.

[0019] Preferably, positioning mechanisms for fixing the transformer body inside the transformer box when installing the transformer body are arranged on the two side surfaces of the moving box. The positioning mechanisms include through holes symmetrically formed in the two side surfaces of the moving box, and rectangular columns slidably arranged on the inner walls of the through holes. Two symmetric cylindrical cavities are formed at the ends of the rectangular columns, and telescopic columns are slidably arranged on the inner walls of the two cylindrical cavities. Tightening plates are fixedly arranged at the telescopic ends of the two telescopic columns, and tightening springs are fixedly arranged at the ends of the telescopic columns, and the other ends of the tightening springs are fixedly connected with the inner walls of the cylindrical cavities.

[0020] By adopting the above technical solution, the telescopic movement of the rectangular column drives the tightening plate to be in tight contact with the inner wall of the transformer box, so as to effectively fix the transformer body.

[0021] Preferably, a connecting cylinder is fixedly arranged on the upper surface of the moving box, the driving motor is fixedly arranged on the upper surface of the connecting cylinder, the vertical threaded column penetrates through the connecting cylinder and extends into the interior of the moving box, two symmetric rotating rods are rotatably arranged on the inner top wall of the connecting cylinder, and the bottom ends of the two rotating rods extend into the interior of the moving box and are rotatably connected with the inner bottom wall of the moving box. A first transmission wheel is fixedly arranged on the surface of the vertical threaded column inside the connecting cylinder, second transmission wheels are fixedly arranged on the outer surfaces of the top ends of the two rotating rods, two transmission belts are sleeved on the surface of the first transmission wheel, and the other ends of the two transmission belts are respectively sleeved on the surfaces of the first transmission wheel and the second transmission wheel.

[0022] By adopting the above technical solution, the rotation of the vertical threaded column can drive the first transmission wheel to rotate, and the rotation of the first transmission wheel can drive the two rotating rods to rotate synchronously under the action of the two transmission belts.

[0023] Preferably, the inner top wall and the inner bottom wall of the moving box are fixed with two symmetrical fixed plates, and the surfaces of the two fixing plates are rotatably provided with transverse threaded columns that pass through the fixed plates, the surface of the rotating rod is fixed with a driving bevel gear, and the end of the transverse threaded column is fixed with a driven bevel gear that meshes with the driving bevel gear, the end of the rectangular column is provided with a cylindrical thread groove threadedly connected to the outer surface of the transverse threaded column, and the outer surface of the end of the rectangular column is fixed with two symmetrical limit blocks, the surface of the fixed plate and the inner side wall of the moving box are fixed with two symmetrical sliding rods, and the surfaces of the two limit blocks are provided with second sliding holes that are respectively slidably connected to the surfaces of the two sliding rods.

[0024] By adopting the above technical solution, the active bevel gear can be driven to rotate by the rotation of the rotating rod, thereby driving the driven bevel gear and the transverse threaded column to rotate automatically, and then the rectangular column can be automatically extended and retracted during the process of automatically lifting and lowering the I-shaped plate through the rotation of the driving motor.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The present invention provides a transformer body and a gradient magnetic permeability filling layer between the winding and the magnetic core, so that the 40KVA power frequency three-phase transformer can achieve concentrated magnetic flux and synchronously optimize heat dissipation and leakage magnetic suppression during actual use, effectively improving the efficiency of the 40KVA power frequency three-phase transformer, while improving the heat dissipation efficiency, solving the leakage magnetic problem, and ensuring the efficiency of electromagnetic coupling.

[0026] 2. The present invention provides a moving mechanism so that when the transformer needs to be moved, the driving motor can be started to drive the vertical threaded column to rotate. The rotation of the vertical threaded column drives the I-shaped plate to move downward, thereby driving the four moving wheels to move downward and pass through the rectangular opening to lift the moving box upward, thereby achieving the purpose of facilitating the movement of the transformer body and making it easy for personnel to move the transformer body to a designated position for placement.

[0027] 3. The present invention provides a positioning mechanism, which can start the driving motor to reverse when the transformer body is moved and transported to the transformer box for installation, driving the vertical threaded column to reverse, thereby driving the I-shaped plate to move upward, so that the moving wheel is retracted into the moving box, thereby ensuring the stability of the transformer body during installation. At the same time, in the process of reverse rotation of the vertical threaded column, the two second transmission wheels and the two rotating rods can be driven to rotate synchronously through the first transmission wheel and the two transmission belts. The rotation of the rotating rod drives the active bevel gear to rotate, and the rotation of the active bevel gear drives the driven bevel gear and the transverse threaded column to rotate. The rotation of the transverse threaded column drives the rectangular column to extend outward under the action of the column thread groove, so that the two clamping plates can be clamped against the inner walls at both ends of the transformer box, thereby realizing effective positioning of the transformer body inside the transformer box. Brief Description of the Drawings

[0028] Figure 1 is a schematic diagram of the overall structure of Embodiment 1 of the present application; Figure 2 is a schematic diagram of the overall structure of Embodiment 2 of the present application; Figure 3 is a three-dimensional structure diagram of the moving box in Embodiment 2 of the present application; Figure 4 is a bottom view structure diagram of the moving box in Embodiment 2 of the present application; Figure 5 is a bottom sectional structure diagram of the moving box in Embodiment 2 of the present application; Figure 6 is a schematic diagram of the internal structure of the moving box in Embodiment 2 of the present application; Figure 7 is a front sectional structure diagram of the moving box in Embodiment 2 of the present application; Figure 8 is of the present application Figure 7 magnified structure diagram at position A; Figure 9 is of the present application Figure 7 magnified structure diagram at position B.

[0029] Description of Reference Numerals: 100, transformer body; 101, base; 102, magnetic core; 103, magnetic core clamp; 104, winding housing; 105, input side A-phase outlet terminal; 106, input side B-phase outlet terminal; 107, input side C-phase outlet terminal; 108, input side D-phase outlet terminal; 109, input side A-phase inlet terminal; 1010, input side B-phase inlet terminal; 1011, input side C-phase inlet terminal; 1012, input side D-phase inlet terminal; 200, moving mechanism; 201, moving box; 202, I-shaped plate; 203, moving wheel; 204, rectangular opening; 205, rubber anti-slip pad; 206, drive motor; 207, vertical threaded column; 208, limiting rod; 300, positioning mechanism; 301, rectangular column; 302, telescopic column; 303, pressing plate; 304, pressing spring; 305, connecting cylinder; 306, rotating rod; 307, first transmission wheel; 308, second transmission wheel; 309, transmission belt; 3010, fixing plate; 3011, horizontal threaded column; 3012, active bevel gear; 3013, driven bevel gear; 3014, cylindrical threaded groove; 3015, limiting block; 3016, sliding rod. Detailed Description of the Invention

[0030] The following is combined with the attached Figure 1 - attached Figure 9, a further detailed description of the present application will be given.

[0031] Embodiment 1: An improved 40KVA industrial frequency three-phase transformer, referring to Figure 1 , includes a transformer body 100. The transformer body 100 includes a base 101, and a magnetic core 102 disposed on the upper surface of the base 101. A magnetic core fixture 103 for fixing the magnetic core 102 on the upper surface of the base 101 is also disposed on the upper surface of the base 101. Three windings are wound on the surface of the magnetic core 102. A winding housing 104 is disposed on the outer surface of the windings. A gradient magnetic permeability filling layer is disposed between the windings and the magnetic core 102. The gradient magnetic permeability filling layer successively uses a high magnetic permeability material and a composite material from the inside to the outside.

[0032] Please refer specifically to Figure 1 , the type of the high magnetic permeability material is iron-silicon-aluminum alloy powder, and its magnetic permeability is greater than 5000, realizing concentrated magnetic flux.

[0033] Specifically, it can realize concentrated magnetic flux and effectively improve the operation efficiency of the transformer body 100.

[0034] Please refer specifically to Figure 1 , the composite material is a nano-aluminum oxide composite material with low magnetic permeability and high thermal conductivity, and its thermal conductivity is greater than or equal to 5W / m·K, realizing synchronous optimization of heat dissipation and leakage magnetic flux suppression.

[0035] Specifically, on the one hand, it can realize effective heat dissipation and improve the heat dissipation efficiency, and on the other hand, it can realize leakage magnetic flux suppression and ensure the electromagnetic coupling efficiency of the transformer body 100.

[0036] Please refer specifically to Figure 1 , the windings are divided into a low-voltage winding and a high-voltage winding. The low-voltage winding is divided into two groups and is respectively wound on the upper half and the lower half of the magnetic core 102. The high-voltage winding is wound spirally on the outside of the low-voltage winding, and micro-channel heat sinks are embedded in the layers.

[0037] Specifically, an interleaved winding topology is adopted to further improve the heat dissipation efficiency and operation efficiency of the transformer body 100.

[0038] Please refer specifically to Figure 1 , two symmetric mounting plates are provided at the top of the magnetic core fixture 103. An input-side phase A outlet terminal 105, an input-side phase B outlet terminal 106, an input-side phase C outlet terminal 107, and an input-side phase D outlet terminal 108 are successively provided on the surface of one mounting plate through bolts. An input-side phase A inlet terminal 109, an input-side phase B inlet terminal 1010, an input-side phase C inlet terminal 1011, and an input-side phase D inlet terminal 1012 are successively provided on the surface of the other mounting plate through bolts.

[0039] Specifically, it is convenient to wire the transformer body 100.

[0040] Among them, the present invention sets the transformer body 100, and a gradient magnetic permeability filling layer is provided between the winding and the magnetic core 102, so that the 40KVA power frequency three-phase transformer can achieve concentrated magnetic flux and realize synchronous optimization of heat dissipation and leakage magnetic flux suppression during actual use, effectively improving the efficiency of the 40KVA power frequency three-phase transformer, while improving the heat dissipation efficiency, and solving the problem of leakage magnetic flux, ensuring the efficiency of electromagnetic coupling.

[0041] Embodiment 2: On the basis of Embodiment 1, with reference to Figures 2 to 9 , and different from Embodiment 1: A moving mechanism 200 is provided at the bottom of the transformer body 100. The moving mechanism 200 includes a moving box 201 fixedly arranged on the lower surface of the base 101 through bolts. An I-shaped plate 202 is slidably arranged on the inner wall of the moving box 201, and four moving wheels 203 are arranged in a rectangular array on the lower surface of the I-shaped plate 202. Four rectangular openings 204 corresponding to the four moving wheels 203 are opened on the inner bottom wall of the moving box 201. Rubber anti-slip pads 205 are fixedly arranged at the four corners of the lower surface of the moving box 201. The moving mechanism 200 further includes a driving motor 206 arranged on the upper surface of the moving box 201 for driving the I-shaped plate 202 to automatically lift and lower.

[0042] Specifically, the driving motor 206 can be used to drive the I-shaped plate 202 to move up and down, thereby driving the moving wheels 203 to lift the moving box 201 and the transformer body 100, achieving the purpose of facilitating the movement of the transformer body 100.

[0043] Please refer specifically to Figure 7 and Figure 8 , the output end of the driving motor 206 is fixedly provided with a vertical threaded column 207 extending into the interior of the moving box 201 and rotatably connected to the inner bottom wall of the moving box 201, and a threaded hole threadedly connected to the outer surface of the vertical threaded column 207 is opened on the upper surface of the I-shaped plate 202; Specifically, the rotation of the vertical threaded column 207 can drive the I-shaped plate 202 to automatically lift and lower.

[0044] Two limiting rods 208 are symmetrically fixedly arranged on the inner top wall and the inner bottom wall of the moving box 201, and first sliding holes respectively slidably connected to the surfaces of the two limiting rods 208 are opened on the upper surface of the I-shaped plate 202.

[0045] Specifically, when the I-shaped plate 202 lifts and lowers, the limiting rods 208 can effectively ensure the stability of the I-shaped plate 202 during movement.

[0046] Among them, by setting the moving mechanism 200, when the transformer needs to be moved, the driving motor 206 can be started to drive the vertical threaded column 207 to rotate. The rotation of the vertical threaded column 207 drives the I-shaped plate 202 to move downward, thereby driving the four moving wheels 203 to move downward and pass through the rectangular opening 204 to jack up the moving box 201, so as to achieve the purpose of facilitating the movement of the transformer body 100, and facilitating personnel to easily move the transformer body 100 to a designated position for placement.

[0047] Please refer particularly to Figure 7 and Figure 9 , positioning mechanisms 300 for fixing the transformer body 100 inside the transformer box when installing the transformer body 100 are provided on both side surfaces of the moving box 201. The positioning mechanism 300 includes through holes symmetrically opened on both side surfaces of the moving box 201, and rectangular columns 301 slidably arranged on the inner walls of the through holes. Two symmetric cylindrical cavities are opened at the ends of the rectangular columns 301, and telescopic columns 302 are slidably arranged on the inner walls of both cylindrical cavities. Tightening plates 303 are fixedly provided at the telescopic ends of the two telescopic columns 302. Tightening springs 304 are fixedly provided at the ends of the telescopic columns 302, and the other ends of the tightening springs 304 are fixedly connected to the inner walls of the cylindrical cavities.

[0048] Specifically, the effective fixing of the transformer body 100 is realized by driving the tightening plate 303 to be in tight contact with the inner wall of the transformer box through the expansion and contraction of the rectangular column 301.

[0049] Please refer particularly to Figure 8 and Figure 9 , a connecting cylinder 305 is fixedly provided on the upper surface of the moving box 201. The driving motor 206 is fixedly provided on the upper surface of the connecting cylinder 305. The vertical threaded column 207 penetrates through the connecting cylinder 305 and extends into the interior of the moving box 201. Two symmetric rotating rods 306 are rotatably arranged on the inner top wall of the connecting cylinder 305, and the bottom ends of both rotating rods 306 extend into the interior of the moving box 201 and are rotatably connected to the inner bottom wall of the moving box 201. A first transmission wheel 307 is fixedly provided on the surface of the vertical threaded column 207 located inside the connecting cylinder 305. Second transmission wheels 308 are fixedly provided on the outer surfaces of the top ends of both rotating rods 306. Two transmission belts 309 are sleeved on the surface of the first transmission wheel 307, and the other ends of both transmission belts 309 are respectively sleeved on the surfaces of the first transmission wheel 307 and the second transmission wheel 308.

[0050] Specifically, the rotation of the vertical threaded column 207 can drive the first transmission wheel 307 to rotate, and the rotation of the first transmission wheel 307 can drive the two rotating rods 306 to rotate synchronously under the action of the two transmission belts 309.

[0051] Please refer particularly to Figure 8 and Figure 9, two symmetrical fixing plates 3010 are fixedly arranged on the inner top wall and inner bottom wall of the moving box 201, and transverse threaded columns 3011 penetrating through the fixing plates 3010 are rotatably arranged on the surfaces of the two fixing plates 3010. An active bevel gear 3012 is fixedly arranged on the surface of the rotating rod 306, and a driven bevel gear 3013 meshing with the active bevel gear 3012 is fixedly arranged at the end of the transverse threaded column 3011. A cylindrical threaded groove 3014 threadedly connected to the outer surface of the transverse threaded column 3011 is formed at the end of the rectangular column 301. Two symmetrical limiting blocks 3015 are fixedly arranged on the outer surface of the end of the rectangular column 301. Two symmetrical sliding rods 3016 are fixedly arranged on the surface of the fixing plate 3010 and the inner side wall of the moving box 201, and second sliding holes respectively slidably connected to the surfaces of the two sliding rods 3016 are formed on the surfaces of the two limiting blocks 3015.

[0052] Specifically, the rotation of the rotating rod 306 can drive the rotation of the active bevel gear 3012, thereby driving the automatic rotation of the driven bevel gear 3013 and the transverse threaded column 3011. Furthermore, during the process of driving the automatic lifting of the I-shaped plate 202 by the rotation of the driving motor 206, the rectangular column 301 can be driven to automatically extend and retract.

[0053] Among them, by setting the positioning mechanism 300, when the transformer body 100 is moved and carried into the transformer box for installation, the driving motor 206 can be started to reverse, driving the reverse rotation of the vertical threaded column 207, thereby driving the upward movement of the I-shaped plate 202 and retracting the moving wheels 203 into the interior of the moving box 201, ensuring the stability during the installation of the transformer body 100. At the same time, during the reverse rotation of the vertical threaded column 207, the two second driving wheels 308 and the two rotating rods 306 can be driven to rotate synchronously through the first driving wheel 307 and the two transmission belts 309. The rotation of the rotating rod 306 drives the rotation of the active bevel gear 3012, and the rotation of the active bevel gear 3012 drives the rotation of the driven bevel gear 3013 and the transverse threaded column 3011. The rotation of the transverse threaded column 3011 drives the rectangular column 301 to extend outwards under the action of the cylindrical threaded groove 3014, so that the two abutting plates 303 can abut against the inner walls at both ends of the transformer box, realizing the effective positioning of the transformer body 100 inside the transformer box.

[0054] Working principle: A gradient magnetic permeability filling layer is provided between the winding and the magnetic core 102 of the present invention, enabling the 40KVA industrial frequency three-phase transformer to achieve concentrated magnetic flux during actual use, and realizing synchronous optimization of heat dissipation and leakage magnetic flux suppression. This effectively improves the efficiency of the 40KVA industrial frequency three-phase transformer, while also improving the heat dissipation efficiency. Moreover, the problem of leakage magnetic flux is solved, ensuring the efficiency of electromagnetic coupling. At the same time, when the transformer needs to be moved, the drive motor 206 can be started to drive the vertical threaded column 207 to rotate. The rotation of the vertical threaded column 207 drives the I-shaped plate 202 to move downward, thereby driving the four moving wheels 203 to move downward and pass through the rectangular opening 204 to lift the mobile box 201 upward, thus achieving the purpose of facilitating the movement of the transformer body 100. This enables personnel to easily move the transformer body 100 to a designated position for placement. Moreover, when moving and transporting the transformer body 100 to be installed inside the transformer box, the drive motor 206 can be started to reverse, driving the vertical threaded column 207 to reverse, thereby driving the I-shaped plate 202 to move upward, retracting the moving wheels 203 into the mobile box 201, ensuring the stability of the transformer body 100 during installation. At the same time, during the reverse rotation of the vertical threaded column 207, the two second drive wheels 308 and the two rotating rods 306 can be driven to rotate synchronously through the first drive wheel 307 and the two drive belts 309. The rotation of the rotating rod 306 drives the active bevel gear 3012 to rotate. The rotation of the active bevel gear 3012 drives the driven bevel gear 3013 and the horizontal threaded column 3011 to rotate. The rotation of the horizontal threaded column 3011 drives the rectangular column 301 to extend outward under the action of the cylindrical threaded groove 3014, so that the two pressing plates 303 can be pressed against the inner walls at both ends of the transformer box, realizing the effective positioning of the transformer body 100 inside the transformer box.

[0055] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. An improved 40KVA power frequency three-phase transformer, comprising a transformer body (100), characterized in that, The transformer body (100) includes a base (101) and a magnetic core (102) disposed on the upper surface of the base (101). A magnetic core clamp (103) for fixing the magnetic core (102) on the upper surface of the base (101) is also disposed on the upper surface of the base (101). Three windings are wound around the surface of the magnetic core (102), and a winding housing (104) is disposed on the outer surface of the windings. A gradient magnetic permeability filling layer is disposed between the windings and the magnetic core (102), and the gradient magnetic permeability filling layer sequentially uses a high magnetic permeability material and a composite material from the inside to the outside.

2. An improved 40KVA power frequency three-phase transformer according to claim 1, characterized in that, The type of the high magnetic permeability material is iron-silicon-aluminum alloy powder, and its magnetic permeability is greater than 5000 to achieve concentrated magnetic flux.

3. An improved 40KVA industrial frequency three-phase transformer according to claim 1, characterized in that, The composite material is a nano-aluminum oxide composite material with low magnetic permeability and high thermal conductivity, and its thermal conductivity is greater than or equal to 5 W / m·K to achieve synchronous optimization of heat dissipation and leakage magnetic flux suppression.

4. An improved 40KVA power frequency three-phase transformer according to claim 1, characterized in that, The windings are divided into a low-voltage winding and a high-voltage winding. The low-voltage winding is divided into two groups and is respectively wound around the upper half and the lower half of the magnetic core (102). The high-voltage winding is wound around the outside of the low-voltage winding in a spiral manner, and micro-channel heat sinks are embedded between layers.

5. An improved 40KVA industrial frequency three-phase transformer according to claim 1, characterized in that, Two symmetric mounting plates are disposed at the top of the magnetic core clamp (103). An input-side phase A outlet terminal (105), an input-side phase B outlet terminal (106), an input-side phase C outlet terminal (107), and an input-side phase D outlet terminal (108) are sequentially disposed on the surface of one mounting plate through bolts. An input-side phase A inlet terminal (109), an input-side phase B inlet terminal (1010), an input-side phase C inlet terminal (1011), and an input-side phase D inlet terminal (1012) are sequentially disposed on the surface of the other mounting plate through bolts.

6. An improved 40KVA power frequency three-phase transformer according to claim 1, characterized in that, A moving mechanism (200) is disposed at the bottom of the transformer body (100). The moving mechanism (200) includes a moving box (201) fixedly disposed on the lower surface of the base (101) through bolts. An I-shaped plate (202) is slidably disposed on the inner wall of the moving box (201), and four moving wheels (203) are disposed in a rectangular array on the lower surface of the I-shaped plate (202). Four rectangular openings (204) corresponding to the four moving wheels (203) are opened on the inner bottom wall of the moving box (201). Rubber anti-slip pads (205) are fixedly disposed at the four corners of the lower surface of the moving box (201). The moving mechanism (200) further includes a driving motor (206) disposed on the upper surface of the moving box (201) for driving the I-shaped plate (202) to automatically lift and lower.

7. An improved 40KVA industrial frequency three-phase transformer according to claim 6, characterized in that, The output end of the driving motor (206) is fixedly provided with a vertical threaded column (207) extending into the interior of the moving box (201) and rotatably connected to the inner bottom wall of the moving box (201), and a threaded hole threadedly connected to the outer surface of the vertical threaded column (207) is opened on the upper surface of the I-shaped plate (202); Two limiting rods (208) are symmetrically fixed on the inner top wall and the inner bottom wall of the moving box (201), and first sliding holes respectively slidably connected to the surfaces of the two limiting rods (208) are formed on the upper surface of the I-shaped plate (202).

8. An improved 40KVA power frequency three-phase transformer according to claim 7, characterized in that, Positioning mechanisms (300) for fixing the transformer body (100) inside the transformer box when installing the transformer body (100) are arranged on the two side surfaces of the moving box (201). The positioning mechanisms (300) include through holes symmetrically formed on the two side surfaces of the moving box (201), and rectangular columns (301) slidably arranged on the inner walls of the through holes. Two symmetric cylindrical cavities are formed at the ends of the rectangular columns (301), and telescopic columns (302) are slidably arranged on the inner walls of the two cylindrical cavities. Tightening plates (303) are fixed to the telescopic ends of the two telescopic columns (302). Tightening springs (304) are fixed to the ends of the telescopic columns (302), and the other ends of the tightening springs (304) are fixedly connected to the inner walls of the cylindrical cavities.

9. An improved 40KVA power frequency three-phase transformer according to claim 8, characterized in that, A connecting cylinder (305) is fixed to the upper surface of the moving box (201). The driving motor (206) is fixed to the upper surface of the connecting cylinder (305). The vertical threaded column (207) penetrates through the connecting cylinder (305) and extends into the moving box (201). Two symmetric rotating rods (306) are rotatably arranged on the inner top wall of the connecting cylinder (305), and the bottom ends of the two rotating rods (306) extend into the moving box (201) and are rotatably connected to the inner bottom wall of the moving box (201). A first transmission wheel (307) is fixed to the surface of the vertical threaded column (207) inside the connecting cylinder (305). Second transmission wheels (308) are fixed to the outer surfaces of the top ends of the two rotating rods (306). Two transmission belts (309) are sleeved on the surface of the first transmission wheel (307), and the other ends of the two transmission belts (309) are respectively sleeved on the surfaces of the first transmission wheel (307) and the second transmission wheel (308).

10. An improved 40KVA power frequency three-phase transformer according to claim 9, characterized in that, Two symmetric fixing plates (3010) are fixed to the inner top wall and the inner bottom wall of the moving box (201). Transverse threaded columns (3011) penetrating through the fixing plates (3010) are rotatably arranged on the surfaces of the two fixing plates (3010). A driving bevel gear (3012) is fixed to the surface of the rotating rod (306), and a driven bevel gear (3013) meshing with the driving bevel gear (3012) is fixed to the end of the transverse threaded column (3011). A cylindrical threaded groove (3014) threadedly connected to the outer surface of the transverse threaded column (3011) is formed at the end of the rectangular column (301). Two symmetric limiting blocks (3015) are fixed to the outer surface of the end of the rectangular column (301). Two symmetric sliding rods (3016) are fixed to the surface of the fixing plate (3010) and the inner side wall of the moving box (201), and second sliding holes respectively slidably connected to the surfaces of the two sliding rods (3016) are formed on the surfaces of the two limiting blocks (3015).

Images