Low-noise single-phase reactor

Abstract

The utility model relates to a low-noise single-phase reactor. Comprising a left iron core and a right iron core, iron yokes are installed between the upper ends and the lower ends of the two iron cores, and coil casting ladles with upper wiring terminals and lower wiring terminals are installed outside the two iron cores; the iron core is formed by stacking a plurality of iron core columns and damping air gap plates, the damping air gap plates are arranged between the adjacent iron core columns, each iron core column is formed by transversely stacking a plurality of iron core cakes, dipping paint and drying the iron core cakes into a whole, and air gap glue is arranged between the end face of each iron core column and the corresponding damping air gap plate; the iron yoke is formed by transversely overlapping a plurality of iron yoke cakes, dipping paint and drying into a whole; the upper base is combined with the iron yoke at the upper part; the lower base is combined with the iron yoke at the lower part; and the upper base and the lower base are fixedly connected by adopting an assembly long bolt. The low-noise single-phase electric reactor is reasonable in structural design, the structural characteristic and the operation characteristic of the electric reactor are improved, and vibration noise caused by the magnetostriction effect during operation of the electric reactor is reduced to a certain extent.

Description

Technical Field

[0001] This utility model belongs to the field of reactor technology, and in particular relates to a low-noise single-phase reactor. Background Technology

[0002] Reactors are primarily used to limit current surges caused by sudden voltage changes in the power grid and operational overvoltages, smooth voltage spikes in the power supply voltage, or voltage defects generated during commutation. They effectively protect frequency converters and improve the power factor, preventing interference from the power grid and reducing harmonic current pollution to the power grid generated by the rectifier unit. They are now widely used in power grid systems. Structurally, a reactor includes an iron core and yoke, windings, and related structural components. The related structural components provide fixed support for the iron core, yoke, and windings, with the winding coils located outside the iron core.

[0003] For reactors, the decisive factor in determining their operating characteristics is the structure of the iron core. The structural design of the iron core determines the overall structural strength and vibration and noise during operation. Improving the characteristics of reactors by continuously optimizing the design of the iron core structure is a key focus in the industry. Utility Model Content

[0004] The purpose of this invention is to provide a low-noise single-phase reactor, thereby improving the structural and operational characteristics of the reactor.

[0005] The technical solution adopted by this utility model is as follows: a low-noise single-phase reactor, including two iron cores, with yokes installed between the upper and lower ends of the two iron cores. Coil ladles with upper and lower terminals are installed on the outside of the two iron cores. The iron core is composed of multiple iron core columns and shock-absorbing air gap plates stacked together. The shock-absorbing air gap plates are arranged between adjacent iron core columns. The iron core column is composed of multiple iron core cakes stacked horizontally and impregnated with paint and dried to form a whole. Air gap adhesive is provided between the end face of the iron core column and the shock-absorbing air gap plate. The yoke is composed of multiple yoke cakes stacked horizontally and impregnated with paint and dried to form a whole. It also includes an upper base connected to the upper yoke and a lower base connected to the lower yoke. The upper base and the lower base are fixedly connected by assembly bolts.

[0006] Preferably, the multiple core discs constituting the core post have a rectangular cross-section, and the thickness and width of each core disc gradually decrease from the middle to both sides, and the cross-section of the core post has an elliptical outer contour.

[0007] Preferably, the multiple yoke discs constituting the yoke have a rectangular cross-section, and the thickness and width of each yoke disc gradually decrease from the middle to both sides, and the cross-section of the yoke has an elliptical outer contour.

[0008] Preferably, a heat dissipation channel for the iron core is provided in the middle of the iron core column, and a heat dissipation channel for the iron yoke is provided in the middle of the iron yoke.

[0009] Preferably, the damping air gap plate has an elliptical outer contour that matches the outer contour of the iron core column, and holes are provided on the plate body of the damping air gap plate. The damping air gap plate is an epoxy glass cloth plate.

[0010] Preferably, the iron core is impregnated with varnish and dried to form a whole, and glass fiber cloth tape is wrapped around the outside of the iron core and bonded and fixed with epoxy resin paint.

[0011] Preferably, the upper base includes two front and rear top connecting beams fixedly connected to the upper yoke by two left and right connecting bolts, and a top crossbeam is provided above the middle of the two top connecting beams; the lower base includes two front and rear bottom connecting beams fixedly connected to the lower yoke by two left and right connecting bolts, and a bottom crossbeam is provided below the middle of the two bottom connecting beams; the two ends of the top crossbeam and the bottom crossbeam are fixedly connected by the assembly long bolts.

[0012] Preferably, both the top connecting beam and the bottom connecting beam are C-shaped steel with the slots facing outwards, the top crossbeam is C-shaped steel with the slots facing upwards, and the bottom crossbeam is C-shaped steel with the slots facing downwards; it also includes two bottom support beams on the left and right, which are located below the left and right sides of the two bottom connecting beams respectively, and the bottom support beams are fixedly connected to the bottom connecting beams.

[0013] The advantages and positive effects of this utility model are:

[0014] This invention provides a low-noise single-phase reactor, improving its structural and operational characteristics. The reactor core consists of longitudinally stacked core columns and vibration-damping air gap plates. The core columns are composed of multiple transversely stacked core discs, and the yoke is composed of multiple transversely stacked yoke discs. By impregnating and drying the core columns with paint to form a single unit, and by placing air gap adhesive between the core columns and the vibration-damping air gap plates while simultaneously impregnating and drying the entire core and yoke, the overall structural strength of the reactor is improved. Furthermore, the segmented air gap assembly structure used in the reactor core can reduce vibration noise caused by magnetostriction during operation to a certain extent, making this single-phase reactor a low-noise product. Attached Figure Description

[0015] Figure 1 This is a side view of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the main structure of the iron core and yoke of this utility model;

[0018] Figure 4 yes Figure 3 A top view of the core column of China Railway Corporation.

[0019] Figure 5 yes Figure 3 A top view of the air gap plate used for damping vibration.

[0020] Figure 6 yes Figure 3 A top view of the iron yoke.

[0021] In the picture:

[0022] 1. Connecting bolts; 2. Iron core; 2-1. Iron core column; 2-2. Vibration damping air gap plate; 3. Iron yoke; 4. Top crossbeam; 5. Top connecting beam; 6. Upper terminal block; 7. Electrical connection plate; 8. Coil casting ladle; 9. Lower terminal block; 10. Bottom connecting beam; 11. Bottom support beam; 12. Assembly bolts; 13. Bottom crossbeam; 14. Connecting holes. Detailed Implementation

[0023] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0024] Please see Figure 1 and Figure 2 The low-noise single-phase reactor of this utility model includes two iron cores 2, one on the left and one on the right. A yoke 3 is installed between the upper and lower ends of the two iron cores 2. A coil spool 8 with an upper terminal 6 and a lower terminal 9 is installed on the outside of the two iron cores 2.

[0025] The two iron cores 2 on the left and right, and the two iron yokes 3 on the top and bottom, form a closed magnetic circuit. The coil ladle 8 consists of an internal coil and an integrally cast epoxy resin ladle. The upper terminal 6 and the lower terminal 7 are connected to the internal coil terminals. Since it is a single-phase reactor, therefore... Figure 2 As shown, the two upper terminals 6 on the two coil ladle 8 are connected by a power connection plate 7, and the two lower terminals 9 are used as the terminals of this single-phase reactor.

[0026] Please see Figure 3 , Figure 4 and Figure 5 It can be seen that:

[0027] The iron core 2 is composed of multiple iron core posts 2-1 and damping air gap plates 2-2 stacked together, with the damping air gap plates 2-2 positioned between adjacent iron core posts 2-1. Each iron core post 2-1 is formed by horizontally stacking multiple iron core discs, impregnating them with paint, and drying them into a single unit. Air gap adhesive is applied between the end face of the iron core post 2-1 and the damping air gap plate 2-2. This adhesive is used to bond and fix the end face of the iron core post 2-1 to the damping air gap plate 5-2 and to fill any gaps. The iron core 2 is impregnated with paint and dried to form a single unit. Fiberglass cloth tape is wrapped around the outside of the iron core 2 and bonded with epoxy resin paint. This enhances the integrity of the iron core and increases the overall structural strength.

[0028] In this embodiment, the multiple iron core discs constituting the iron core column 2-1 have a rectangular cross-section. From the middle to both sides, the thickness and width of each iron core disc gradually decrease, and the cross-section of the iron core column 2-1 has an elliptical outer contour.

[0029] Furthermore, the damping air gap plate 2-2 has an elliptical outer contour that matches the outer contour of the iron core column 2-1, and holes are provided on the plate body of the damping air gap plate 2-2. The damping air gap plate 2-2 is an epoxy glass cloth plate.

[0030] Please see Figure 3 and Figure 6 It can be seen that:

[0031] The iron yoke 3 is formed by stacking multiple iron yoke cakes horizontally, impregnating them with paint, and drying them into a whole. As shown in the figure, the multiple iron yoke cakes that make up the iron yoke 3 have a rectangular cross-section. From the middle to both sides, the thickness and width of each iron yoke cake gradually decrease, and the cross-section of the iron yoke 3 has an elliptical outer contour.

[0032] like Figure 4 and Figure 6 As shown, the left profile of the left iron core 2 is the same as the left profile of the two iron yokes 3, and similarly, the right profile of the right iron core 2 is the same as the right profile of the two iron yokes 3.

[0033] In this embodiment, a core heat dissipation duct is provided in the middle of the core post 2-1, and a yoke heat dissipation duct is provided in the middle of the yoke 3. The core heat dissipation duct is formed during the stacking and forming process of the core cake of the core post 2-1, and the yoke heat dissipation duct is formed during the stacking and forming process of the yoke cake. The aforementioned core heat dissipation duct and yoke heat dissipation duct allow airflow to enter and exit, which is used to dissipate the heat generated by the reactor during operation, reduce the heat impact on the coil ladle 8, improve the heat dissipation capacity of the reactor itself, and improve the reliability and stability of this single-phase reactor during operation.

[0034] It also includes an upper base that is combined with the upper yoke 3 and a lower base that is combined with the lower yoke 3. The upper base and the lower base are fixedly connected by assembly bolts 12.

[0035] Please see Figure 1 and Figure 2 It can be seen that:

[0036] The upper base includes two front and rear top connecting beams 5, which are fixedly connected to the upper yoke 3 by two left and right connecting bolts 1. A top crossbeam 4 is provided above the middle of the two top connecting beams 5. The lower base includes two front and rear bottom connecting beams 10, which are fixedly connected to the lower yoke 3 by two left and right connecting bolts 1. A bottom crossbeam 13 is provided below the middle of the two bottom connecting beams 10. The two ends of the top crossbeam 4 and the bottom crossbeam 13 are fixedly connected by the assembly long bolts 12, that is, the left end of the top crossbeam 4 and the bottom crossbeam 13 are fixedly connected by one assembly long bolt 12, and the right end of the two are fixedly connected by another assembly long bolt 12.

[0037] A vertically penetrating groove can be integrally cast on the outer wall of the coil ladle 8, allowing the main body of the assembly long bolt 12 to fall into the groove. This prevents the assembly long bolt 12 from being exposed and improves the surface regularity.

[0038] Both the top connecting beam 5 and the bottom connecting beam 10 are C-shaped steel with their grooves facing outwards. The top crossbeam 4 is a C-shaped steel with its groove facing upwards, and the bottom crossbeam 13 is a C-shaped steel with its groove facing downwards. It also includes two bottom support beams 11, located below the left and right sides of the two bottom connecting beams 10 respectively, and the bottom support beams 11 are fixedly connected to the bottom connecting beams 10. Specifically, connecting holes 14 are provided on both the upper and lower yokes 3, and corresponding holes are provided on the top connecting beam 5 and the bottom connecting beam 10. The upper and lower connecting bolts 1 pass through the aforementioned connecting holes 14.

[0039] The bottom support beam 11 can be a C-shaped steel with the opening facing outwards. The bottom support beam 11 and the bottom connecting beam 10 can be fixedly connected at the abutment position using assembly short bolts (not shown in the figure).

Claims

1. A low-noise single-phase reactor, characterized in that: It includes two iron cores (2) on the left and right, and iron yokes (3) are installed between the upper and lower ends of the two iron cores (2). Coil castings (8) with upper terminals (6) and lower terminals (9) are installed on the outside of the two iron cores (2). The iron core (2) is composed of multiple iron core columns (2-1) and shock-absorbing air gap plates (2-2) stacked together. The shock-absorbing air gap plates (2-2) are set between adjacent iron core columns (2-1). The iron core column (2-1) is composed of multiple iron core cakes stacked horizontally and impregnated with paint and dried to form a whole. Air gap glue is provided between the end face of the iron core column (2-1) and the shock-absorbing air gap plate (2-2). The iron yoke (3) is composed of multiple iron yoke cakes stacked horizontally and impregnated with paint and dried to form a whole. It also includes an upper base combined with the upper iron yoke (3) and a lower base combined with the lower iron yoke (3). The upper base and the lower base are fixedly connected by assembly long bolts (12).

2. The low-noise single-phase reactor as described in claim 1, characterized in that: The multiple iron core discs constituting the iron core column (2-1) have rectangular cross-sections. From the middle to both sides, the thickness and width of each iron core disc gradually decrease. The cross-section of the iron core column (2-1) has an elliptical outer contour.

3. The low-noise single-phase reactor as described in claim 2, characterized in that: The multiple yoke cakes constituting the yoke (3) have rectangular cross-sections. From the middle to both sides, the thickness and width of each yoke cake gradually decrease, and the cross-section of the yoke (3) has an elliptical outer contour.

4. The low-noise single-phase reactor as described in claim 3, characterized in that: A heat dissipation channel for the iron core is provided in the middle of the iron core column (2-1), and a heat dissipation channel for the iron yoke (3) is provided in the middle of the iron yoke.

5. The low-noise single-phase reactor as described in claim 4, characterized in that: The damping air gap plate (2-2) has an elliptical outer contour that matches the outer contour of the iron core column (2-1). Holes are provided on the plate body of the damping air gap plate (2-2). The damping air gap plate (2-2) is an epoxy glass cloth plate.

6. The low-noise single-phase reactor as described in claim 5, characterized in that: The iron core (2) is impregnated with paint and dried to become a whole. Glass fiber cloth tape is wrapped around the outside of the iron core (2) and fixed with epoxy resin paint.

7. The low-noise single-phase reactor as described in claim 6, characterized in that: The upper base includes two front and rear top connecting beams (5) fixedly connected to the upper iron yoke (3) by two left and right connecting bolts (1), and a top crossbeam (4) is provided above the middle of the two top connecting beams (5); the lower base includes two front and rear bottom connecting beams (10) fixedly connected to the lower iron yoke (3) by two left and right connecting bolts (1), and a bottom crossbeam (13) is provided below the middle of the two bottom connecting beams (10); the two ends of the top crossbeam (4) and the bottom crossbeam (13) are fixedly connected by the assembly long bolts (12).

8. The low-noise single-phase reactor as described in claim 7, characterized in that: The top connecting beam (5) and the bottom connecting beam (10) are both C-shaped steel with the slot facing outwards. The top crossbeam (4) is C-shaped steel with the slot facing upwards, and the bottom crossbeam (13) is C-shaped steel with the slot facing downwards. It also includes two bottom support beams (11) on the left and right. The two bottom support beams (11) are located below the left and right sides of the two bottom connecting beams (10) respectively, and the bottom support beams (11) are fixedly connected to the bottom connecting beams (10).

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