Liquid immersion type iron core column system adopting DMC air gap cushion blocks and electric reactor

Abstract

The invention provides a liquid immersion type iron core column system adopting DMC air gap cushion blocks and an electric reactor. The air gap cushion block made of the DMC material is arranged between the iron core cakes on the iron core column, the high temperature resistance, high strength, low density and excellent insulating property of the DMC material are utilized, and the air gap cushion block has good compatibility with natural ester insulating oil. By means of the design, the DMC air gap cushion block keeps stable and does not deform in the long-term operation of the reactor, the influence of impulse voltage on the iron core column is effectively absorbed, and therefore vibration and noise of the reactor are remarkably reduced. Besides, the iron core column system comprises a main air gap and auxiliary air gaps which are flexible and adjustable, the main air gap is located in the center of the iron core column, the auxiliary air gaps are distributed at the positions of an upper iron yoke and a lower iron yoke at the two ends of the iron core column, the inductance value can be accurately controlled by adjusting the sizes of the air gaps, and then the overall performance and the production efficiency of the reactor are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of design and manufacturing of liquid-immersed reactors in high-end environmentally friendly electrical equipment, and in particular to a liquid-immersed core column system and a reactor using a DMC air gap spacer. Background Art

[0002] As the main primary equipment of the power grid system, the liquid-immersed iron core reactor mainly plays the role of impact resistance and reactive power compensation. The noise control of the core column of the liquid-immersed iron core reactor has always been the main concern of the liquid-immersed iron core reactor. When the product is running, the stability of the air gap, the amplitude of deformation, and the stability of its deformation law will affect the overall noise control effect of the core column. The current mainstream solution is to use marble material to make air cushions, but because the hardness of marble material is too high, the surface polishing smoothness requirements are very high, the processing and process treatment process is relatively complicated, resulting in low production efficiency, and it is difficult to meet the requirements of liquid-immersed iron core reactors for high stability of the air gap and deformation regularity. Summary of the invention

[0003] In view of this, on one hand, the present invention proposes a liquid-immersed core column system using DMC air gap spacers, comprising an upper iron yoke and a lower iron yoke correspondingly arranged above and below, and a plurality of core columns arranged in parallel therebetween; a plurality of core cakes arranged in sequence at preset intervals are provided in the middle of the core column, and a main air gap is preset between adjacent core cakes, and auxiliary air gaps are set between both ends of the core column and the upper iron yoke and the lower iron yoke; a plurality of DMC spacers are fixedly arranged between adjacent core cakes, and the insulating oil in the core column can flow in the gaps between the plurality of DMC spacers.

[0004] Specifically, the air gap spacer of DMC material is placed between the core cakes on the core column. The DMC air gap spacer is selected for its high temperature resistance, high strength, low density and superior insulation performance, and shows good compatibility with natural ester insulating oil. During the operation of the reactor, the core column vibrates due to the electromagnetic field, and the DMC air gap spacer can effectively prevent deformation during vibration due to its high hardness and extrusion resistance, as well as a certain amount of elasticity, and meet the requirements of reactor operation; the DMC air gap spacer can remain unchanged during the long-term operation of the reactor equipment, and can absorb the impact of the impulse voltage on the core column during switching; compared with the marble spacer, the DMC material has moderate hardness and a certain amount of elasticity, so that it can better adapt to the impact of the over-impact voltage on the core column of the reactor at the moment of switching while maintaining its strength.

[0005] In terms of structural design, the core column system adopts the configuration of main air gap and auxiliary air gap. The main air gap is located at the center of the core column, while the auxiliary air gap is distributed at the upper and lower iron yokes of the core column. The size of the main air gap is determined according to the theoretical design value to ensure the predetermined performance of the reactor; the auxiliary air gap is used to adjust the deviation in the production process to meet the specific requirements for the inductance value in the actual design.

[0006] In this embodiment, the plurality of DMC pads collectively cover more than 65% of the surface area of ​​the core cake.

[0007] Furthermore, an auxiliary block is provided in the auxiliary air gap, and the area of ​​the auxiliary block is consistent with the size of the DMC pad.

[0008] Furthermore, the auxiliary block is made of epoxy insulating board with a thickness of 1-2 mm.

[0009] Furthermore, the DMC pad is a cylindrical pad with a diameter between 50 mm and 80 mm.

[0010] Furthermore, the number of the DMC spacers depends on the reactance value and the spacing between the main air gap and the auxiliary air gap.

[0011] Specifically, the circular structure of the DMC pad not only realizes the air gap function, but also promotes the fluidity of the natural ester insulating oil in the air gap space inside the reactor, thereby optimizing the heat dissipation performance of the core column. This design scheme not only improves manufacturing efficiency, but also enhances the dynamic stability and impact resistance of the reactor during operation. In addition, by accurately configuring the main air gap and the auxiliary air gap, the present invention achieves fine control of the inductance value, thereby improving the overall performance and production efficiency of the reactor.

[0012] Furthermore, adjacent core cakes are connected together via a first grounding sheet, and the first grounding sheet is led out through a wire on the core cake.

[0013] Furthermore, the insulating oil in the core column is natural ester insulating oil.

[0014] Furthermore, the DMC air gap spacers are evenly distributed in the core cake.

[0015] Preferably, three core columns are arranged side by side in parallel.

[0016] Preferably, the core column comprises two parts of the column and six core cakes, and the six core cakes are connected in sequence and arranged between the two parts of the column.

[0017] Furthermore, a second grounding plate is connected between the two ends of the core column and the upper iron yoke and the lower iron yoke.

[0018] The present invention provides a liquid-immersed core column system using a DMC air gap pad, which has the following advantages: the air gap pad of the DMC material is placed between the core cakes on the core column, the DMC air gap pad has high temperature resistance, high strength, low density and excellent insulation performance, and shows good compatibility with natural ester insulating oil. During the operation of the reactor, the core column vibrates due to the electromagnetic field, and the DMC air gap pad can effectively prevent deformation during vibration due to its high hardness and extrusion resistance, as well as a certain amount of elasticity, and meet the requirements of the operation of the reactor; this design enables the DMC air gap pad to remain stable and non-deformed during the long-term operation of the reactor, effectively absorbing the impact of the impulse voltage on the core column, thereby significantly reducing the vibration and noise of the reactor. In addition, the core column system includes a flexible and adjustable main air gap and an auxiliary air gap, the main air gap is located at the center of the core column, and the auxiliary air gaps are distributed at the upper and lower iron yokes at both ends of the core column. By adjusting the size of these air gaps, the inductance value can be accurately controlled, thereby improving the overall performance and production efficiency of the reactor.

[0019] Another aspect of the present invention provides a liquid-immersed reactor, using any of the above-mentioned liquid-immersed core column systems using DMC air gap spacers.

[0020] The present invention provides a liquid-immersed reactor, which adopts an iron core column system with a DMC air gap spacer and a main air gap and an auxiliary air gap, so that the reactor can achieve fine control of the inductance value, thereby improving the overall performance and production efficiency of the reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic structural diagram of a liquid-immersed core column system using a DMC air gap spacer provided in an embodiment of the present invention (I); Figure 2 A schematic diagram of the placement structure of the DMC pad on the core cake provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a liquid-immersed core column system using a DMC air gap spacer provided in an embodiment of the present invention (II); Figure 4 A schematic structural diagram of a liquid immersed reactor provided in an embodiment of the present invention; In the figure, 1, upper iron yoke, 2, iron core column, 3, lower iron yoke, 4, auxiliary air gap, 5, insulating oil, 6, press frame, 7, bottom frame, 8, grounding point, 9, oil tank; 21. Iron core, 22. DMC spacer, 23. Main air gap, 24. Column, 25. First grounding plate, 41. Second grounding plate. DETAILED DESCRIPTION

[0022] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] See also Figure 1-3 As shown, it is a liquid-immersed core column system using DMC air gap pads provided by an embodiment of the present invention, including an upper iron yoke 1 and a lower iron yoke 3 correspondingly arranged above and below, and a plurality of core columns 2 arranged in parallel therebetween; a plurality of core cakes 21 arranged in sequence at preset intervals are provided in the middle of the core column 2, and a main air gap 23 is preset between adjacent core cakes 21, and auxiliary air gaps 4 are provided between both ends of the core column 24 and the upper iron yoke 1 and the lower iron yoke 3; a plurality of DMC pads 22 are fixedly provided between adjacent core cakes 21, and the insulating oil in the core column 2 can flow in the gaps between the plurality of DMC pads 22.

[0024] Specifically, the air gap spacer of DMC material is placed between the core cakes on the core column. The DMC air gap spacer is selected for its high temperature resistance, high strength, low density and superior insulation performance, and shows good compatibility with natural ester insulating oil. During the operation of the reactor, the core column vibrates due to the electromagnetic field, and the DMC air gap spacer can effectively prevent deformation during vibration due to its high hardness and extrusion resistance, as well as a certain amount of elasticity, and meet the requirements of reactor operation; the DMC air gap spacer can remain unchanged during the long-term operation of the reactor equipment, and can absorb the impact of the impulse voltage on the core column during switching; compared with the marble spacer, the DMC material has moderate hardness and a certain amount of elasticity, so that it can better adapt to the impact of the over-impact voltage on the core column of the reactor at the moment of switching while maintaining its strength.

[0025] In this embodiment, an auxiliary block is further provided in the auxiliary air gap 4 , and the area of ​​the auxiliary block is consistent with the size of the DMC pad 22 .

[0026] In this embodiment, the auxiliary block is made of epoxy insulating board with a thickness of 1-2 mm.

[0027] Specifically, the core column system adopts the configuration of main air gap and auxiliary air gap. The main air gap is located at the center of the core column, while the auxiliary air gap is distributed at the upper and lower iron yokes of the core column. The size of the main air gap is determined according to the theoretical design value to ensure the predetermined performance of the reactor; the auxiliary air gap is used to adjust the deviation in the production process to meet the specific requirements for the inductance value in the actual design.

[0028] In this embodiment, the plurality of DMC pads 22 collectively cover more than 65% of the surface area of ​​the core cake 21 .

[0029] In this embodiment, the DMC pad 22 is a cylindrical pad with a diameter between 50 mm and 80 mm; the number of the DMC pads 22 depends on the reactance value and the spacing between the main air gap and the auxiliary air gap, and the calculation formula is:.

[0030] Specifically, the circular structure of the DMC pad not only realizes the air gap function, but also promotes the fluidity of the natural ester insulating oil in the air gap space inside the reactor, thereby optimizing the heat dissipation performance of the core column. This design scheme not only improves manufacturing efficiency, but also enhances the dynamic stability and impact resistance of the reactor during operation. In addition, by accurately configuring the main air gap and the auxiliary air gap, the present invention achieves fine control of the inductance value, thereby improving the overall performance and production efficiency of the reactor.

[0031] Reference Figure 1 , 3 As shown in FIG. 4 , adjacent core cakes 21 are connected together by a first grounding plate 25 , and the first grounding plate 25 is led out through a wire on the core cake 21 .

[0032] In this embodiment, the insulating oil in the core column is natural ester insulating oil.

[0033] In this embodiment, the DMC air gap spacers 22 are evenly distributed between the core cakes 21 .

[0034] Reference Figure 1 , 3 As shown in 4, three core columns 2 are arranged in parallel.

[0035] Reference Figure 1 , 4 As shown, a second grounding plate 41 is connected between the two ends of the core column 21 and the upper iron yoke 1 and the lower iron yoke 3 .

[0036] Reference Figure 3As shown, in a preferred embodiment disclosed in the present invention, the product as a whole is a three-phase integrated core column structure, including three core columns 2, a middle main air gap plus auxiliary air gaps on the upper and lower sides are adopted, the air gap spacer is made of DMC material, and after the core column 2 is covered with a coil, the entire body is immersed in natural ester insulating oil; the core column 21 includes two parts of the column 24 and six core cakes 21, the six core cakes 21 are connected in sequence and arranged between the two parts of the column 24, as shown in the attached figure Figure 3 As shown in the figure, a unified unit size is adopted below, the size of the core cake 21 is 50 units, the size of the column 24 is 260 units, the distance between the core column 2 and the adjacent core column 2 is 700 units, the size of the main air gap 23 is 10 units, and the size of the auxiliary air gap 4 is 2~10 units.

[0037] The embodiment of the present invention discloses a liquid-immersed core column system using a DMC air gap pad, which has the following beneficial technical effects: the air gap pad of the DMC material is placed between the core cakes on the core column, the DMC air gap pad has high temperature resistance, high strength, low density and excellent insulation performance, and shows good compatibility with natural ester insulating oil. During the operation of the reactor, the core column vibrates due to the electromagnetic field, and the DMC air gap pad can effectively prevent deformation during vibration due to its high hardness and extrusion resistance, as well as a certain amount of elasticity, and meet the requirements of the operation of the reactor; this design enables the DMC air gap pad to remain stable and non-deformed during the long-term operation of the reactor, effectively absorbing the impact of the impulse voltage on the core column, thereby significantly reducing the vibration and noise of the reactor. In addition, the core column system includes a flexible and adjustable main air gap and an auxiliary air gap, the main air gap is located at the center of the core column, and the auxiliary air gaps are distributed at the upper and lower iron yokes at both ends of the core column. By adjusting the size of these air gaps, the inductance value can be accurately controlled, thereby improving the overall performance and production efficiency of the reactor.

[0038] Reference Figure 4 As shown, the embodiment of the present invention also discloses a liquid-immersed reactor, which uses the liquid-immersed core column system using the DMC air gap block described in any of the above embodiments, and further includes a press frame 6 arranged above the upper iron yoke 1, and a base frame 7 arranged below the lower iron yoke 3, a grounding point 8 is arranged on one side of the base frame 7, and the core column system is placed in an oil tank 9 as a whole, and the oil tank 9 is filled with natural ester insulating oil 5. The liquid-immersed reactor adopts the core column system with the DMC air gap block and the main air gap and the auxiliary air gap, so that the reactor can achieve fine control of the inductance value, thereby improving the overall performance and production efficiency of the reactor.

[0039] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0040] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A liquid immersed core column system using a DMC air gap spacer, characterized in that: It comprises an upper iron yoke and a lower iron yoke which are arranged correspondingly from top to bottom, and a plurality of iron core columns which are arranged in parallel therebetween; a plurality of iron core cakes which are arranged in sequence at preset intervals are arranged in the middle of the iron core column, and a main air gap is preset between adjacent iron core cakes, and auxiliary air gaps are arranged between both ends of the iron core column and the upper iron yoke and the lower iron yoke; a plurality of DMC pads are fixedly arranged between adjacent iron core cakes, and the insulating oil in the iron core column can flow in the gaps between the plurality of DMC pads.

2. The liquid immersed core column system using DMC air gap spacers according to claim 1, characterized in that: The plurality of DMC spacers collectively cover more than 65% of the surface area of ​​the core cake.

3. The liquid immersed core column system using DMC air gap spacers according to claim 1, characterized in that: The DMC pad is a cylindrical pad with a diameter between 50 mm and 80 mm.

4. The liquid immersed core column system using DMC air gap spacers according to claim 1, characterized in that: Adjacent core cakes are connected together via a first grounding sheet, and the first grounding sheet is led out through a wire on the core cake.

5. The liquid immersed core column system using DMC air gap spacers according to claim 1, characterized in that: The number of the DMC spacers depends on the reactance value and the spacing between the main air gap and the auxiliary air gap.

6. The liquid immersed core column system using DMC air gap spacers according to claim 1, characterized in that: The DMC air gap spacers are evenly distributed between the core cakes.

7. The liquid immersed core column system using DMC air gap spacers according to claim 1, characterized in that: An auxiliary block is also arranged in the auxiliary air gap, and its area is consistent with the size of the DMC pad.

8. The liquid immersed core column system using DMC air gap spacers according to claim 7, characterized in that: The auxiliary block is made of epoxy insulating board with a thickness of 1-2 mm.

9. The liquid immersed core column system using DMC air gap spacers according to claim 1, characterized in that: A second grounding sheet is connected between the two ends of the iron core column and the upper iron yoke and the lower iron yoke.

10. A liquid immersed reactor, characterized in that: A liquid-immersed core column system using a DMC air gap spacer according to any one of claims 1 to 9 is used.

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