Low-voltage winding of oil-immersed power transformer
By designing a structure including low-voltage winding and reinforcement components in an oil-immersed power transformer, the problems of low-voltage winding low-voltage winding are solved, and more efficient heat output and more stable support are achieved, thereby improving the reliability of the transformer.
Patent Information
- Application Number
- CN202421626989.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The low-voltage windings of existing oil-immersed power transformers are closer to the iron core, resulting in low heat conduction efficiency, which can easily cause heat accumulation, accelerate the aging of insulation materials, affect the stability of electrical appliances, and lack a stable support structure, resulting in low reliability.
An oil-immersed power transformer low-voltage winding is designed, including a low-voltage winding and a reinforcement assembly. The low-voltage winding is arranged in the reinforcement assembly, and a pore is formed between the windings. The thermal pad part and a clamping strip structure are adopted. The thermal pad part is embedded along the pores. The clamping strip is vertically clamped in the clamping groove, and is riveted with the positioning ring. Aluminum nitride material is used to improve thermal conductivity and support.
Through this design, the low-voltage winding can more effectively export internal heat, improve heat dissipation efficiency, enhance support, reduce loosening and displacement caused by electromagnetic force or external force, improve the stability of low-voltage resistance and the long-term reliability of the transformer.
Smart Images
Figure CN222883360U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformers, in particular to a low-voltage winding of an oil-immersed power transformer. Background Art
[0002] Oil-immersed power transformers are widely used in power systems. As key equipment for power conversion and transmission, they realize voltage conversion and current transmission between high voltage and low voltage.
[0003] The low-voltage winding of the existing oil-immersed power transformer is closer to the iron core, resulting in a low efficiency of heat conduction from the low-voltage winding to the outside, which easily causes heat accumulation inside the low-voltage resistor. Long-term use will accelerate the aging of the insulating material and affect the stability of the electrical appliance. In addition, the lack of a stable supporting structure causes the problem of low reliability of the transformer in long-term use. Therefore, a low-voltage winding of an oil-immersed power transformer is proposed to improve a set of low-voltage winding structures for the oil-immersed transformer, so that the low-voltage winding structure closer to the iron core can better conduct the internal heat to the outside, and at the same time has better support, effectively reducing the looseness and displacement caused by the action of electromagnetic force or external force during the operation of the transformer, improving the stability of the use of the low-voltage resistor, and making the long-term operation of the transformer more reliable. Utility Model Content
[0004] In view of the problems in the prior art, the utility model provides a low-voltage winding of an oil-immersed power transformer to improve a set of low-voltage winding structures for the oil-immersed transformer, so that the low-voltage winding structure closer to the iron core can better conduct internal heat to the outside, and at the same time has good support, effectively reducing the loosening and displacement caused by electromagnetic force or external force during the operation of the transformer, improving the stability of the use of low-voltage resistors, and making the long-term operation of the transformer more reliable.
[0005] The technical solution adopted by the utility model to solve the technical problem is a low-voltage winding of an oil-immersed power transformer, comprising a low-voltage winding and a reinforcement component, wherein the low-voltage winding is arranged in the reinforcement component, and gaps are formed between the windings of the low-voltage winding;
[0006] The reinforcing component comprises an upper positioning ring, a lower positioning ring, a thermal pad and a clamping strip. The upper positioning ring and the lower positioning ring are arranged at the top and bottom of the low voltage winding. The thermal pad is provided in several groups and is embedded in the pores.
[0007] By adopting the above technical solution, through the components composed of low-voltage windings and reinforcement components, a set of low-voltage winding structures is added to the oil-immersed transformer, so that the low-voltage winding structure closer to the iron core can better discharge the internal heat to the outside, and at the same time has good support, effectively reducing the looseness and displacement caused by electromagnetic force or external force during the operation of the transformer, improving the stability of the use of low-voltage resistors, and making the long-term operation of the transformer more reliable.
[0008] Specifically, the thermal pad portion includes a gasket, one end of the gasket is located in the hole, and a slot is formed at one end of the gasket away from the hole.
[0009] By adopting the above technical solution, the heat inside the low-voltage winding is better conducted to the outside through the thermal conductive pad.
[0010] Specifically, the clamping strips are provided in a plurality of groups, and the clamping strips are vertically clamped in the clamping slots, and the top and the bottom of the clamping strips are riveted to the upper positioning ring and the lower positioning ring.
[0011] Specifically, the card strip includes a first heat conducting sheet, a second heat conducting sheet and a heat spreader, the heat spreader is located between the first heat conducting sheet and the second heat conducting sheet, and the first heat conducting sheet, the second heat conducting sheet and the heat spreader are welded together.
[0012] By adopting the above technical solution, heat can be conducted more evenly.
[0013] Specifically, the upper positioning ring, the lower positioning ring, the gasket, the first heat conducting plate and the second heat conducting plate are all made of aluminum nitride material.
[0014] By adopting the above technical solution, the upper positioning ring, the lower positioning ring, the gasket, the first heat conducting plate and the second heat conducting plate made of aluminum nitride material have good thermal conductivity.
[0015] The beneficial effects of the utility model are as follows: through the assembly consisting of the low-voltage winding and the reinforcement assembly, a set of low-voltage winding structures is provided for the oil-immersed transformer, so that the low-voltage winding structure closer to the iron core can better conduct the internal heat to the outside, and at the same time has good support, effectively reducing the looseness and displacement caused by the action of electromagnetic force or external force during the operation of the transformer, improving the stability of the use of the low-voltage resistor, and making the long-term operation reliability of the transformer better, and solving the problem that the low-voltage winding of the existing oil-immersed power transformer is closer to the iron core, resulting in low external heat conduction efficiency inside the low-voltage winding, which is easy to cause heat accumulation inside the low-voltage resistor. Long-term use will accelerate the aging of the insulating material and affect the stability of the electrical appliance. In addition, the lack of a stable supporting structure causes the low reliability of the transformer in long-term use. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0017] Figure 1 It is an overall schematic diagram of the utility model;
[0018] Figure 2 It is a schematic diagram of the low voltage winding of the utility model;
[0019] Figure 3 For the utility model Figure 2 The enlarged schematic diagram at A in the middle;
[0020] Figure 4 For the utility model Figure 1 The enlarged schematic diagram of point B in the middle;
[0021] In the figure: 1. low voltage winding; 2. upper positioning ring; 3. lower positioning ring; 4. thermal pad; 401. gasket; 402. slot; 5. clamping strip; 501. first thermal conductive sheet; 502. second thermal conductive sheet; 503. heat spreader. DETAILED DESCRIPTION
[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.
[0023] In order to improve the reliability of use, Figure 1-4 As shown, the low-voltage winding of an oil-immersed power transformer described in the utility model comprises a low-voltage winding 1 and a reinforcement component, wherein the low-voltage winding 1 is arranged in the reinforcement component, and gaps 11 are formed between the turns of the low-voltage winding 1;
[0024] The reinforcing assembly includes an upper positioning ring 2, a lower positioning ring 3, a thermal pad 4 and a clamping strip 5. The upper positioning ring 2 and the lower positioning ring 3 are arranged at the top and bottom of the low-voltage winding 1. The thermal pad 4 is provided in several groups and is embedded in the gap 11.
[0025] When in use, a low-voltage winding structure is provided for the oil-immersed transformer through the low-voltage winding 1 and the reinforcement component, so that the low-voltage winding structure closer to the core can better discharge the internal heat to the outside, and at the same time has good support, effectively reducing the looseness and displacement caused by electromagnetic force or external force during the operation of the transformer, improving the stability of the use of low-voltage resistors, and making the long-term operation of the transformer more reliable.
[0026] The thermal pad portion 4 includes a gasket 401 , one end of the gasket 401 is located in the hole 11 , and a slot 402 is formed at one end of the gasket 401 away from the hole 11 .
[0027] The clamping strips 5 are provided in a plurality of groups, and the clamping strips 5 are vertically clamped in the clamping grooves 402 , and the top and bottom of the clamping strips 5 are riveted to the upper positioning ring 2 and the lower positioning ring 3 .
[0028] In order to improve the uniformity of heat conduction, for example, Figure 3 , 4 As shown, the utility model also includes that the card strip 5 includes a first heat conducting sheet 501, a second heat conducting sheet 502 and a heat spreader 503, the heat spreader 503 is located between the first heat conducting sheet 501 and the second heat conducting sheet 502, and the first heat conducting sheet 501, the second heat conducting sheet 502 and the heat spreader 503 are welded together.
[0029] When in use, the heat spreader 503 can improve the uniformity of heat conduction from the first heat conducting sheet 501 to the second heat conducting sheet 502 , and the clip 5 composed of the first heat conducting sheet 501 , the second heat conducting sheet 502 and the heat spreader 503 has good use strength.
[0030] The upper positioning ring 2 , the lower positioning ring 3 , the gasket 401 , the first heat conducting plate 501 and the second heat conducting plate 502 are all made of aluminum nitride material.
[0031] When the utility model is in use, the present application is assembled on the outside of the iron core in the oil-immersed transformer, and the upper positioning ring 2 and the lower positioning ring 3 are fixed to the supporting frame in the transformer. When fixing, bolt riveting or clamping can be selected. During the use of the oil-immersed transformer, the low-voltage winding 1 is fixed based on the reinforcement component, so that the low-voltage winding 1 has better stability during the operation of the transformer, and the coordinated clamping of the thermal pad 4 and the clamping strip 5 in the reinforcement component can reduce the vibration of the low-voltage winding 1 under the action of electromagnetic force, thereby reducing the operating noise of the transformer, and the overall reinforcement component is mostly made of aluminum nitride material with good thermal conductivity, so that the heat inside the low-voltage winding 1 can be conducted to the outside faster and better, thereby improving the heat dissipation efficiency inside the low-voltage winding 1, and further improving the stability and reliability of the transformer.
[0032] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.
Claims
1. A low voltage winding of an oil-immersed power transformer, characterized in that: It comprises a low-voltage winding (1) and a reinforcement component, wherein the low-voltage winding (1) is arranged in the reinforcement component, and gaps (11) are formed between the turns of the low-voltage winding (1); The reinforcing component comprises an upper positioning ring (2), a lower positioning ring (3), a thermally conductive pad (4) and a clamping strip (5); the upper positioning ring (2) and the lower positioning ring (3) are arranged at the top and bottom of the low-voltage winding (1); the thermally conductive pad (4) is provided in a plurality of groups; and the thermally conductive pad (4) is embedded in the pore (11).
2. The low-voltage winding of an oil-immersed power transformer according to claim 1, characterized in that: The heat-conducting pad portion (4) comprises a gasket (401), one end of the gasket (401) is located in the pore (11), and a slot (402) is provided at one end of the gasket (401) away from the pore (11).
3. The low voltage winding of an oil-immersed power transformer according to claim 2, characterized in that: The clamping strips (5) are provided in a plurality of groups, and the clamping strips (5) are vertically clamped in the clamping grooves (402), and the top and bottom of the clamping strips (5) are riveted to the upper positioning ring (2) and the lower positioning ring (3).
4. The low-voltage winding of an oil-immersed power transformer according to claim 3, characterized in that: The card strip (5) comprises a first heat conducting sheet (501), a second heat conducting sheet (502) and a heat spreader (503); the heat spreader (503) is located between the first heat conducting sheet (501) and the second heat conducting sheet (502); and the first heat conducting sheet (501), the second heat conducting sheet (502) and the heat spreader (503) are welded together.
5. The low-voltage winding of an oil-immersed power transformer according to claim 4, characterized in that: The upper positioning ring (2), the lower positioning ring (3), the gasket (401), the first heat conducting plate (501) and the second heat conducting plate (502) are all made of aluminum nitride material.