Three-phase double-winding non-excitation voltage-regulating dry-type transformer

Abstract

The utility model discloses a three-phase double-winding non-excitation voltage regulation dry-type transformer which comprises a dry-type transformer body, a lower clamping seat is fixedly installed at the bottom of the dry-type transformer body, an upper clamping seat is fixedly installed at the top of the dry-type transformer body, and meanwhile a low-voltage conducting bar and a high-voltage conducting bar are respectively installed on the upper clamping seat. Efficient heat dissipation rows are mounted on the two sides of the surface of the lower clamping seat; the efficient heat dissipation row comprises an outer frame fixed to the surface of the lower clamping base in a screwed mode, and a driving shaft is movably installed in the outer frame. According to the three-phase double-winding excitation-free voltage-regulating dry-type transformer, the two groups of high-efficiency heat dissipation rows are arranged on the two sides of the bottom of the dry-type transformer body respectively, and the two groups of high-efficiency heat dissipation rows work at the same time, so that heat generated when the dry-type transformer body works can be subjected to air-cooling heat dissipation work from bottom to top; and a traditional heat dissipation mode using heat dissipation fins is omitted, and the heat dissipation mode of the dry-type transformer body is more efficient.

Description

Technical Field

[0001] The utility model relates to the field of dry-type transformers, and specifically to a three-phase double-winding non-excitation voltage-regulating dry-type transformer. Background Technique

[0002] With the rapid growth of the economy, various electrical equipment has been continuously developed and applied to various occasions; the application of transformers has also become more and more extensive; a transformer is a static electrical appliance that uses the principle of electromagnetic induction to convert a certain level of voltage and current into another level of voltage and current of the same frequency between two or more coils and transmit electrical energy.

[0003] The existing transformers are exposed to the environment for a long time, and a large amount of dust will accumulate on the surface of the heat dissipation fins arranged around them, which will seriously affect the heat dissipation performance of the heat dissipation fins, reduce the heat dissipation effect on the transformers, and thus reduce the safety of the transformers during use.

[0004] Therefore, it is necessary to provide a three-phase double-winding non-excitation voltage-regulating dry-type transformer, which should be able to conveniently and efficiently perform sufficient heat dissipation work on the transformer. Content of the Utility Model

[0005] The purpose of the utility model is to provide a three-phase double-winding non-excitation voltage-regulating dry-type transformer to solve the defects mentioned in the above background technique.

[0006] To achieve the above purpose, a three-phase double-winding non-excitation voltage-regulating dry-type transformer is provided, including a dry-type transformer body. A lower clamp seat is fixedly installed at the bottom of the dry-type transformer body, and an upper clamp seat is fixedly installed at the top of the dry-type transformer body. At the same time, a low-voltage busbar and a high-voltage busbar are respectively installed on the upper clamp seat, and high-efficiency heat dissipation rows are installed on both sides of the surface of the lower clamp seat; the high-efficiency heat dissipation row includes an outer frame screwed and fixed on the surface of the lower clamp seat, and a driving shaft is movably installed inside the outer frame. At the same time, mounting pieces are fixedly arranged on the surface of the driving shaft, and multiple groups of mounting pieces are evenly arranged on the surface of the mounting pieces. A driving hole is opened inside the end of the driving shaft, the cross-section of the driving hole is a regular hexagon structure, and a driving column is fixedly arranged at one end of the driving shaft far away from the driving hole. At the same time, the cross-section of the driving column is a regular hexagon structure.

[0007] Preferably, the axial cross-section of the outer frame is a circular structure, and an isosceles trapezoidal base is fixedly arranged at the bottom of the outer frame. At the same time, end covers are screwed and fixed on both sides of the outer frame.

[0008] Preferably, three mounting pieces are evenly and fixedly arranged on the surface of the driving shaft, and multiple groups of equally spaced fan blades are fixedly arranged on the outside of the driving shaft through the three mounting pieces.

[0009] Preferably, the mounting piece is a circular structure made of metal, and the fan blade is a structure with an arc-shaped cross-section made of metal. At the same time, a fixing film is adhesively bonded to the surface of the fan blade.

[0010] Preferably, a plurality of groups of air inlets are evenly arranged on the outer side of the outer frame at equal intervals, and upper covers are screwed and fixed on both sides of the top of the outer frame. At the same time, the upper cover and the outer frame are connected by two rectangular sound insulation pads.

[0011] Preferably, a plurality of groups of air outlets are evenly arranged on the surface of the upper cover, and the distance between adjacent two groups of air outlets is the same. At the same time, the cross-section of the air outlet is inclined.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] Two groups of high-efficiency heat dissipation rows are arranged at both sides of the bottom of the dry-type transformer body respectively. When the two groups of high-efficiency heat dissipation rows work simultaneously, the heat generated by the dry-type transformer body during operation can be cooled by air from bottom to top, canceling the traditional heat dissipation method using heat dissipation fins, and the heat dissipation method for the dry-type transformer body is more efficient;

[0014] Compared with the traditional natural air cooling and ordinary fans, it can more quickly transfer the heat generated in the coil into the air, so as to achieve the purpose of improving the safe operation and service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a front view schematic diagram of the structure of the present utility model;

[0016] Figure 2 is the Figure 1 side view of the structure of the present utility model;

[0017] Figure 3 is the Figure 1 top view of the structure of the present utility model;

[0018] Figure 4 is a schematic diagram of the structure of the high-efficiency heat dissipation row of the present utility model;

[0019] Figure 5 is a schematic diagram of the structure of the fan blade and its connection structure of the present utility model;

[0020] Figure 6 is the Figure 4 rear view of the structure of the present utility model.

[0021] Reference Numerals in the Figures: 1, Dry-Type Transformer Body; 2, Lower Clamping Seat; 3, Upper Clamping Seat; 4, Low-Voltage Conductive Busbar; 5, High-Voltage Conductive Busbar; 6, High-Efficiency Heat Dissipation Row; 61, Outer Frame; 62, Air Inlet; 63, End Cover; 64, Mounting Plate; 65, Fan Blade; 651, Film; 66, Drive Shaft; 661, Drive Hole; 67, Sound Insulation Pad; 68, Upper Cover; 69, Air Outlet. Detailed Implementation Manner

[0022] Please refer to Figures 1-6 , the present utility model provides a three-phase double-winding non-excitation voltage-regulating dry-type transformer, including a dry-type transformer body 1, a lower clamping seat 2 is fixedly installed at the bottom of the dry-type transformer body 1, and an upper clamping seat 3 is fixedly installed at the top of the dry-type transformer body 1. At the same time, a low-voltage conductive busbar 4 and a high-voltage conductive busbar 5 are respectively installed on the upper clamping seat 3, and high-efficiency heat dissipation rows 6 are installed on both sides of the surface of the lower clamping seat 2; the high-efficiency heat dissipation row 6 includes an outer frame 61 screwed and fixed on the surface of the lower clamping seat 2, and a drive shaft 66 is movably installed inside the outer frame 61. At the same time, a mounting plate 64 is fixedly arranged on the surface of the drive shaft 66, and multiple groups of mounting plates 64 are evenly arranged on the surface of the mounting plate 64. A drive hole 661 is opened inside the end of the drive shaft 66. The cross-section of the drive hole 661 is a regular hexagon structure, and a drive column is fixedly arranged at one end of the drive shaft 66 away from the drive hole 661. At the same time, the cross-section of the drive column is a regular hexagon structure.

[0023] Working Principle: When in use, the high-efficiency heat dissipation rows 6 are arranged in two groups and installed on both sides of the bottom of the dry-type transformer body 1 respectively. The two groups of high-efficiency heat dissipation rows 6 work simultaneously, and can perform air-cooling heat dissipation work from bottom to top on the heat generated by the dry-type transformer body 1 during operation, canceling the traditional heat dissipation method using heat dissipation fins, and making the heat dissipation method of the dry-type transformer body 1 more efficient.

[0024] As a preferred implementation manner, the axial cross-section of the outer frame 61 is a circular structure, and an isosceles trapezoidal base is fixedly arranged at the bottom of the outer frame 61. At the same time, end covers 63 are screwed and fixed on both sides of the outer frame 61.

[0025] Three groups of mounting plates 64 are evenly and fixedly arranged on the surface of the drive shaft 66, and multiple groups of fan blades 65 arranged at equal intervals are fixedly arranged on the outside of the drive shaft 66 through the three groups of mounting plates 64.

[0026] As Figures 2-5 shown: The fan blades 65 are fixedly arranged on the outside of the drive shaft 66 through the three groups of mounting plates 64. The fan blades 65 rotate at high speed, and the air flow is accelerated and then ejected from the air outlet 69. The air flow impacts on the bottom of the dry-type transformer body 1, and can perform sufficient air-cooling heat dissipation on the high-voltage coil and low-voltage coil on the dry-type transformer body 1.

[0027] The mounting piece 64 is a circular structure made of metal, and the fan blade 65 is a structure with an arc-shaped cross-section made of metal. At the same time, a fixing film 651 is adhesively fixed on the surface of the fan blade 65.

[0028] A plurality of groups of air inlets 62 are evenly arranged on the outer side of the outer frame 61 at equal intervals. The upper cover 68 is screwed and fixed on both sides of the top of the outer frame 61. At the same time, the upper cover 68 and the outer frame 61 are connected by two rectangular sound insulation pads 67. A fixing film 651 is adhesively fixed on the surface of the fan blade 65. The fixing film 651 is a rubber sheet with certain vibration absorption and buffering functions, which can reduce the vibration generated when the fan blade 65 rotates, thereby reducing the noise caused by vibration.

[0029] As a preferred embodiment, a plurality of groups of air outlets 69 are evenly arranged on the surface of the upper cover 68. The distance between adjacent two groups of air outlets 69 is the same. At the same time, the cross-section of the air outlet 69 is inclined.

[0030] Three groups of high-efficiency heat dissipation rows 6 are arranged on one side of the bottom of the dry-type transformer body 1. The three groups of high-efficiency heat dissipation rows 6 can be driven by the driving holes 661 and the driving shafts on the three driving shafts 66. The cross-sections of the driving holes 661 and the driving shafts are both regular hexagonal structures. By inserting the driving shaft into the inside of the driving hole 661, the driving shafts 66 inside the adjacent two groups of high-efficiency heat dissipation rows 6 can be driven to rotate. The three groups of high-efficiency heat dissipation rows 6 can be driven by a single motor.

[0031] Compared with the traditional natural air cooling and ordinary fans, it can transfer the heat generated in the coil to the air more quickly, so as to achieve the purpose of improving the safe operation and service life of the product.

[0032] The high-voltage winding adopts a segmented structure, which is divided into eight segments as a whole, and resin pads are filled between the segments, greatly reducing the interlayer voltage and improving the overall insulation strength of the winding. The interlayer insulation uses 0.4mm glass fiber grid cloth, which can increase the interlayer insulation strength and make the resin better penetrate into the turns and layers of the coil during the vacuum casting of the winding, so that the partial discharge amount of the product can be guaranteed within 10 pc.

Claims

1. A three-phase double-winding non-excitation voltage-regulating dry-type transformer, comprising a dry-type transformer body (1), characterized in that: The bottom of the dry-type transformer body (1) is fixedly mounted with a lower clamp seat (2), and the top of the dry-type transformer body (1) is fixedly mounted with an upper clamp seat (3), and a low-voltage conductive bar (4) and a high-voltage conductive bar (5) are respectively mounted on the upper clamp seat (3), and high-efficiency heat sinks (6) are mounted on both sides of the surface of the lower clamp seat (2); the high-efficiency heat sink (6) comprises an outer frame (61) screwed and fixed to the surface of the lower clamp seat (2), and a drive shaft (66) is movably mounted inside the outer frame (61), and a mounting plate (64) is fixedly arranged on the surface of the drive shaft (66), and a plurality of groups of mounting plates (64) are evenly arranged on the surface of the mounting plate (64), a drive hole (661) is provided on the inner side of the end of the drive shaft (66), and the cross-section of the drive hole (661) is a regular six deformation structure, and a drive column is fixedly arranged at one end of the drive shaft (66) away from the drive hole (661), and the cross-section of the drive column is a regular six deformation structure.

2. A three-phase double-winding non-excitation voltage regulating dry-type transformer according to claim 1, characterized in that: The axial section of the outer frame (61) is a circular structure, and an isosceles trapezoidal base is fixedly arranged at the bottom of the outer frame (61), while both sides of the outer frame (61) are screwed and fixed with end covers (63).

3. A three-phase double-winding non-excitation voltage regulating dry-type transformer according to claim 1, characterized in that: Three groups of mounting plates (64) are evenly and fixedly arranged on the surface of the driving shaft (66), and a plurality of groups of equidistantly arranged fan blades (65) are fixedly arranged on the outer side of the driving shaft (66) through the three groups of mounting plates (64).

4. A three-phase double-winding non-excitation voltage regulating dry-type transformer according to claim 3, characterized in that: The mounting plate (64) is a circular structure made of metal material, and the fan blade (65) is a structure made of metal material with an arc-shaped cross section, and a film (651) is bonded and fixed to the surface of the fan blade (65).

5. A three-phase double-winding non-excitation voltage regulating dry-type transformer according to claim 1, characterized in that: The outer side of the outer frame (61) is evenly provided with a plurality of groups of air inlets (62) arranged at equal distances, and an upper cover (68) is screwed and fixed on both sides of the top of the outer frame (61), and the upper cover (68) and the outer frame (61) are connected by two groups of rectangular sound insulation pads (67).

6. A three-phase double-winding non-excitation voltage regulating dry-type transformer according to claim 5, characterized in that: A plurality of groups of air outlets (69) are evenly arranged on the surface of the upper cover (68), and the distance between two adjacent groups of air outlets (69) is consistent. Meanwhile, the cross-section of the air outlets (69) is inclined.

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