Improved dry-type transformer
By optimizing the air-cooled air flow flow path inside the dry transformer and adopting a cooling structure with gap arrangement, combined with the semiconductor refrigeration sheet and fan blade structure, the problem of low heat dissipation efficiency of existing dry transformers is solved, achieving more efficient heat dissipation effects and reducing noise and vibration.
Patent Information
- Application Number
- CN202510349303.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2025-05-09
AI Technical Summary
The existing dry transformers have low heat dissipation efficiency, and simply increasing fan power will lead to increased equipment volume, noise and vibration.
By optimizing the air-cooled air flow flow path inside the dry transformer, a cooling base and top plate with gap arrangement are used, and combined with semiconductor refrigeration sheet and fan blade structure, the air-cooling efficiency is improved.
It significantly improves the heat dissipation effect of the dry transformer, improves the air cooling efficiency, and reduces noise and vibration.
Smart Images
Figure CN119964937A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a transformer, in particular to an improved dry-type transformer. Background Art
[0002] Dry-type transformers are widely used in places with high requirements for environmental protection and fire prevention because of their safety, environmental protection and simple maintenance. Dry-type transformers dissipate heat from transformer windings through air cooling. Large-capacity dry-type transformers require their heat dissipation devices to have high heat dissipation efficiency. If the fan power is simply increased, not only will the transformer volume increase significantly, but its working noise and vibration will also increase significantly. Summary of the invention
[0003] The technical problem to be solved by the present invention is to provide an improved dry-type transformer, which can solve the deficiencies of the prior art and improve the heat dissipation effect of the dry-type transformer.
[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.
[0005] An improved dry-type transformer comprises a transformer box, wherein a box door is arranged at the front of the transformer box, windings are placed inside the box, a box cushion is arranged at the bottom of the transformer box, the box cushion is provided with a first vent hole penetrating from top to bottom, an air-cooling shell is arranged at the top of the transformer box, second vent holes are arranged at the top and bottom of the air-cooling shell respectively, and a first negative pressure fan is arranged at the top of the air-cooling shell; a cooling base is installed inside the air-cooling shell, a cooling top plate is arranged above the cooling base, a gap is left between the cooling base and the cooling top plate, and a third vent hole is opened on the cooling top plate.
[0006] Preferably, the top surface of the cooling base is vertically provided with a plurality of first lower columns and second lower columns, which are spaced apart, and the bottom surface of the cooling top plate is vertically provided with a plurality of first upper columns and second upper columns, which are spaced apart.
[0007] Preferably, the cooling base is a hollow structure, and a second negative pressure fan is installed in the second upper column. The second negative pressure fan takes in air from the bottom of the second upper column, and the air outlet of the second negative pressure fan is connected to the adjacent second lower column through a second air pipe, and the first lower column is connected to the adjacent third air vent through the first air pipe.
[0008] Preferably, a semiconductor cooling plate is installed on the side wall of the first vent hole, and a fan blade is installed in the first vent hole through a fan blade bracket, and the axial direction of the fan blade is parallel to the flow direction of the airflow.
[0009] Preferably, the fan blade comprises a central axis mounted on a fan blade bracket, three connecting arms are sleeved on the central axis, the angle between adjacent connecting arms is 120°, and the free end of the connecting arm is connected to a spoiler via a connecting arm shaft.
[0010] Preferably, a toothed portion is provided on the side of the spoiler facing the rotation direction, and a torsion spring is connected between the connecting arm and the spoiler.
[0011] Preferably, a heat-conducting metal sheet is provided on the side of the spoiler facing away from the rotation direction.
[0012] Preferably, a guide groove is provided between the edge of the spoiler and the toothed portion, and the guide groove is connected to the edge of the bottom surface of the spoiler via a connecting groove.
[0013] The beneficial effect brought about by adopting the above technical solution is that the present invention improves the air cooling efficiency by optimizing the air cooling air flow path inside the dry-type transformer, thereby improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural diagram of a specific implementation mode of the present invention.
[0015] Figure 2 It is a structural diagram of the interior of an air-cooled housing in a specific embodiment of the present invention.
[0016] Figure 3 It is a structural diagram of the first vent hole in a specific embodiment of the present invention.
[0017] Figure 4 It is a structural diagram of the guide groove and the connecting groove in a specific implementation manner of the present invention. DETAILED DESCRIPTION
[0018] Reference Figure 1-4 A specific embodiment of the present invention includes a transformer box 1, a box door 6 is provided at the front of the transformer box 1, a winding 7 is placed inside the box, a box cushion 5 is provided at the bottom of the transformer box 1, and the box cushion 5 is provided with a first vent 3 running through from top to bottom, an air-cooling shell 2 is provided at the top of the transformer box 1, and second vents 4 are provided at the top and bottom of the air-cooling shell 2, respectively, and a first negative pressure fan 30 is provided at the top of the air-cooling shell 2; a cooling base 16 is installed inside the air-cooling shell 2, and a cooling top plate 18 is provided above the cooling base 16, and a gap is left between the cooling base 16 and the cooling top plate 18, and a third vent 9 is provided on the cooling top plate 18. The first negative pressure fan 30 introduces airflow from the bottom of the transformer into the transformer, absorbs heat from the inside of the transformer, and then discharges it from the air-cooling shell 2. By providing the cooling base 16 and the cooling top plate 18 arranged in a gap, the airflow can be fully contacted and heat-exchanged with the cooling base 16 and the cooling top plate 18 in the air-cooling shell 2.
[0019] Specifically, a plurality of first lower columns 13 and second lower columns 14 are vertically arranged on the top surface of the cooling base 16, and the first lower columns 13 and the second lower columns 14 are arranged at intervals, and a plurality of first upper columns 8 and second upper columns 10 are vertically arranged on the bottom surface of the cooling top plate 18, and the first upper columns 8 and the second upper columns 10. The cooling base 16 is a hollow structure, and a second negative pressure fan 15 is installed in the second upper column 10, and the second negative pressure fan 15 takes in air from the bottom of the second upper column 10, and the air outlet end of the second negative pressure fan 15 is connected to the adjacent second lower column 14 through the second air supply pipe 12, and the first lower column 13 is connected to the adjacent third vent 9 through the first air supply pipe 11. After the airflow enters the air-cooled housing 2 through the second vent 4, it flows between the first lower column 13 and the second lower column 14, and the first upper column 8 and the second upper column 10. Part of the airflow then flows out of the air-cooled housing 2 through the third vent 9 and the cooling top plate 18. Part of the airflow enters the second air pipe 12 through the second negative pressure fan 15, then flows in the reverse direction through the second lower column 14 and mixes in the cooling base 16, and finally enters the third vent 9 through the first air pipe 11 and flows out. In the whole process, the airflow can flow back and forth between the cooling base 16 and the cooling top plate 18, fully exchanging heat with them, thereby achieving a heat dissipation effect.
[0020] In addition to using air cooling for passive heat dissipation, the present invention also adopts an active heat dissipation method. A semiconductor cooling sheet 17 is installed on the side wall of the first vent 3, and a fan blade 22 is installed in the first vent 3 through a fan blade bracket 29, and the axial direction of the fan blade 22 is parallel to the flow direction of the airflow. The airflow flows through the first vent 3, and is cooled by the semiconductor cooling sheet 17 to reduce the temperature. At the same time, the flowing airflow pushes the fan blade 22 to rotate when passing through the fan blade 22. At the same time, the fan blade 22 stirs the airflow, so that the contact process between the airflow and the semiconductor cooling sheet 17 is more uniform. The fan blade 22 includes a central axis 28 installed on the fan blade bracket 29, and three connecting arms 26 are sleeved on the central axis 28. The angle between adjacent connecting arms 26 is 120°, and the free end of the connecting arm 26 is connected to a spoiler 23 through a connecting arm shaft 25. As the airflow changes, the driving force of the airflow on the spoiler 23 also changes synchronously, so that the opening angle of the spoiler 23 after being stressed also changes, so that the size of the airflow stirring effect of the fan blade 22 can be adjusted synchronously with the airflow velocity. The spoiler 23 is provided with a toothed portion 24 on the side facing the rotation direction, and a torsion spring 27 is connected between the connecting arm 26 and the spoiler 23. The side of the spoiler 23 facing away from the rotation direction is provided with a heat-conducting metal sheet 19. A guide groove 20 is provided between the edge of the spoiler 23 and the toothed portion 24, and the guide groove 20 is connected to the bottom edge of the spoiler 23 through a connecting groove 21. When the toothed portion 24 contacts the airflow, the airflow can be broken up to improve the mixing uniformity of the airflow flow process. The heat-conducting metal sheet 19 is close to the conductor cooling sheet 17, which is used to efficiently transfer heat to the conductor cooling sheet 17 and improve the airflow cooling effect. When the airflow flows through the spoiler 23 , part of the airflow is guided by the guide groove 20 and the connecting groove 21 , and the two airflows merge in the area of the toothed portion 24 to form a turbulent flow area, thereby further enhancing the effect of the toothed portion 24 on breaking up the airflow.
[0021] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. An improved dry-type transformer, comprising a transformer box (1), a box door (6) is arranged at the front of the transformer box (1), a winding (7) is placed inside the box, and the characteristics are: The transformer box (1) is provided with a box cushion layer (5) at the bottom, the box cushion layer (5) is provided with a first ventilation hole (3) running through from top to bottom, an air-cooling shell (2) is provided at the top of the transformer box (1), the top and bottom of the air-cooling shell (2) are respectively provided with second ventilation holes (4), and the top of the air-cooling shell (2) is provided with a first negative pressure fan (30); a cooling base (16) is installed inside the air-cooling shell (2), a cooling top plate (18) is provided above the cooling base (16), a gap is left between the cooling base (16) and the cooling top plate (18), and a third ventilation hole (9) is provided on the cooling top plate (18).
2. The improved dry-type transformer according to claim 1, characterized in that: The top surface of the cooling base (16) is vertically provided with a plurality of first lower columns (13) and second lower columns (14), and the first lower columns (13) and the second lower columns (14) are arranged at intervals; the bottom surface of the cooling top plate (18) is vertically provided with a plurality of first upper columns (8) and second upper columns (10), and the first upper columns (8) and the second upper columns (10).
3. The improved dry-type transformer according to claim 2, characterized in that: The cooling base (16) is a hollow structure, and a second negative pressure fan (15) is installed in the second upper column (10). The second negative pressure fan (15) takes in air from the bottom of the second upper column (10), and the air outlet of the second negative pressure fan (15) is connected to the adjacent second lower column (14) through a second air supply pipe (12), and the first lower column (13) is connected to the adjacent third vent (9) through a first air supply pipe (11).
4. The improved dry-type transformer according to claim 3, characterized in that: A semiconductor cooling plate (17) is installed on the side wall of the first ventilation hole (3), and a fan blade (22) is installed in the first ventilation hole (3) via a fan blade bracket (29), and the axial direction of the fan blade (22) is parallel to the flow direction of the airflow.
5. The improved dry-type transformer according to claim 4, characterized in that: The fan blade (22) comprises a central axis (28) mounted on a fan blade bracket (29), three connecting arms (26) are sleeved on the central axis (28), the angle between adjacent connecting arms (26) is 120°, and the free end of the connecting arm (26) is axially connected to a spoiler (23) via a connecting arm axis (25).
6. The improved dry-type transformer according to claim 5, characterized in that: A toothed portion (24) is provided on one side of the spoiler (23) facing the rotation direction, and a torsion spring (27) is connected between the connecting arm (26) and the spoiler (23).
7. The improved dry-type transformer according to claim 6, characterized in that: A heat-conducting metal sheet (19) is provided on the side of the spoiler (23) facing away from the rotation direction.
8. The improved dry-type transformer according to claim 7, characterized in that: A guide groove (20) is provided between the edge of the spoiler (23) and the toothed portion (24), and the guide groove (20) is connected to the bottom edge of the spoiler (23) via a connecting groove (21).