CN217426501U - Transformer - Google Patents

Abstract

The utility model discloses a transformer, including high-voltage coil injection molding body and low-voltage coil, the high-voltage coil injection molding body include high-voltage coil and mould plastics in high-voltage coil's insulator, the insulator is formed with the mounting hole, just the mounting hole is located high-voltage coil's radial inboard, low-voltage coil install in the mounting hole. The transformer only carries out injection molding on the high-voltage coil, but not the low-voltage coil; the low-voltage coil is not coated by an insulator, so that a relatively better heat dissipation environment can be provided, and the heat productivity of the low-voltage coil can be dissipated timely; due to the existence of the mounting hole, the thickness of the insulator in the inner part of the high-voltage coil can be smaller, the thermal constraint of the insulator on the high-voltage coil can be weakened, and the heat dissipation environment of the high-voltage coil can be better; therefore, the transformer has relatively good heat dissipation performance, can improve the stability of the transformer under long-term operation conditions, and is beneficial to prolonging the service life.

Description

Transformer

Technical Field

The utility model relates to a transformer technical field, concretely relates to transformer.

Background

In order to improve the safety of the transformer, the existing solid-state transformer generally pours the high-voltage coil and the low-voltage coil into an insulating solid. However, when the transformer works for a long time, the high-voltage coil and the low-voltage coil generate a large amount of heat, and the heat dissipation performance of the insulating solid is limited, which inevitably affects the working performance and the service life of the transformer.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a transformer, this transformer have the heat dispersion of relative preferred, can improve the stability under the long-term running condition to be favorable to increase of service life.

In order to solve the technical problem, the utility model provides a transformer, including high-tension coil injection molding body and low tension coil, the high-tension coil injection molding body include high-tension coil and mould plastics in high-tension coil's insulator, the insulator is formed with the mounting hole, just the mounting hole is located high-tension coil's radial inboard, low tension coil install in the mounting hole.

Be different from conventional design, the embodiment of the utility model provides a only mould plastics high-voltage coil, and do not mould plastics low-voltage coil. Therefore, the low-voltage coil is not coated by an insulator, and the low-voltage coil can have a relatively better heat dissipation environment so as to dissipate the heat of the low-voltage coil in time; and because the existence of mounting hole, the insulator can be less at the thickness of high-voltage coil inside part, and the insulator can weaken to high-voltage coil's heat constraint, and high-voltage coil's heat dissipation environment also can become better. Therefore, the utility model provides a transformer can possess the heat dispersion of relative preferred, can improve its stability under long-term operation condition to be favorable to increase of service life.

Optionally, the insulator is provided with a clamping member at one axial end of the mounting hole, and one axial end of the low-voltage coil is assembled to the clamping member.

Optionally, the clamping member includes a plurality of hooks, and the hooks are distributed at intervals along the circumferential direction of the mounting hole.

Optionally, the hook comprises a connecting arm and a stopping arm which are connected, the stopping arm is connected with the inner hole wall of the mounting hole through the connecting arm, and the low-voltage coil is located between the stopping arm and the inner hole wall.

Optionally, an inner wall of the low-voltage coil radially abuts against the stop arm, and an outer wall of the low-voltage coil is in clearance fit with the inner hole wall in the radial direction.

Optionally, the stop arm has an easy release wall.

Optionally, the low-voltage coil is mounted on the insulator, and the low-voltage coil is fixed by the insulating stopper.

Optionally, the insulation stopper includes an axial stopper and a radial stopper, the radial stopper is mounted on the axial stopper, the axial stopper is mounted on the insulator, and the radial stopper is used for radially stopping the low-voltage coil.

Optionally, the radial stop comprises two annular baffles which are sleeved with each other.

Optionally, the low-voltage coil comprises a magnetic core, and at least part of the magnetic core is inserted into the low-voltage coil.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a transformer according to the present invention;

FIG. 2 is a schematic structural view of a high-voltage coil injection molded body;

FIG. 3 is a cross-sectional view of a high voltage coil injection molded body;

FIG. 4 is a schematic structural view of an insulating stopper;

fig. 5 is a cross-sectional view of the transformer, without showing the magnetic core.

The reference numerals in fig. 1-5 are illustrated as follows:

1, a high-voltage coil injection molding body, a 1a high-voltage coil, a 1b insulator, 11 mounting holes, 12 clamping components, 121 clamping hooks, 121a connecting arms and 121b stopping arms;

2, a low-voltage coil;

3 insulating stop, 31 axial stop, 32 radial stop, 321 annular baffle;

4 magnetic cores.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As used herein, the term "plurality" refers to an indefinite number of plural, usually more than two; and when the term "plurality" is used to indicate a quantity of a particular element, it does not indicate a quantitative relationship between such elements.

Referring to fig. 1-5, fig. 1 is a schematic structural diagram of a transformer according to an embodiment of the present invention; FIG. 2 is a schematic structural view of a high-voltage coil injection molded body; FIG. 3 is a cross-sectional view of a high voltage coil injection molded body; FIG. 4 is a schematic structural view of an insulating stopper; fig. 5 is a cross-sectional view of the transformer, without the magnetic core.

As shown in fig. 1, the utility model provides a transformer, including high-voltage coil injection molding 1 and low-voltage coil 2. Referring to fig. 3, the high voltage coil injection molded body 1 includes a high voltage coil 1a and an insulator 1b injection-molded on the high voltage coil 1a, the insulator 1b can protect the high voltage coil 1a to ensure safety, and the high voltage coil 1a can form at least one contact (not shown) on a surface of the insulator 1b to facilitate wiring. The insulator 1b is formed with a mounting hole 11, and the mounting hole 11 is located radially inside the high-voltage coil 1a, and the low-voltage coil 2 is mounted to the mounting hole 11.

Be different from conventional design, the embodiment of the utility model provides a just mould plastics high voltage coil 1a, and do not mould plastics low voltage coil 2. Thus, the low-voltage coil 2 is not coated by the insulator 1b, and the low-voltage coil 2 can have a relatively better heat dissipation environment so as to dissipate the heat generated by the low-voltage coil 2 in time; further, due to the presence of the mounting hole 11, the thickness of the insulator 1b in the inner portion of the high voltage coil 1a can be made small, thermal constraint of the insulator 1b to the high voltage coil 1a can be weakened, and the heat radiation environment of the high voltage coil 1a can be improved. Therefore, the utility model provides a transformer can possess the heat dispersion of relative preferred, can improve its stability under long-term operation condition to be favorable to increase of service life.

It should be pointed out that, although the embodiment of the utility model provides a do not mould plastics low tension coil 2, nevertheless, low tension coil 2 is whole to be installed in high tension coil injection molding 1, and high tension coil injection molding 1's insulator 1b also can protect low tension coil 2, consequently, the utility model provides a transformer's security performance still can obtain better assurance.

Here, the embodiment of the present invention does not limit the material of the insulator 1b, and in the specific implementation, those skilled in the art can set the material according to actual needs as long as the requirement of use can be satisfied. For example, the insulator 1b may be made of epoxy resin, which has excellent mechanical and electrical insulation properties, and the high-voltage coil injection molded body 1 formed by injection molding may have high structural strength and may reliably protect the high-voltage coil 1 a.

Additionally, the embodiment of the utility model provides a do not still inject the mounting means of low voltage coil 2 in mounting hole 11, in the concrete practice, technical personnel in the field can set up according to actual need, as long as can guarantee the reliable assembly of low voltage coil 2 can.

In a specific embodiment, as shown in fig. 2, 3 and 5, the insulator 1b may be provided with a snap member 12 at one axial end portion (lower end portion in fig. 5) of the mounting hole 11, and one axial end portion of the low voltage coil 2 may be fitted to the snap member 12 to fix the one axial end portion (lower end portion in fig. 5) of the low voltage coil 2.

The latch member 12 and the insulator 1b may be an integrally formed one-piece structure. Alternatively, the latch member 12 and the insulator 1b may be manufactured separately and then assembled integrally by a connection method such as welding, bonding, welding, caulking, or lock screw connection. In comparison, the integral forming process can improve the convenience of processing and assembling; the split manufacturing process can provide more selectable sizes and structural forms for the clamping member 12, so that the structure and the size of the clamping member 12 can be adjusted according to the structure and the size of the low-voltage coil 2 in specific practice, the degree of freedom in installation can be improved, and the installation reliability of the low-voltage coil 2 can be ensured.

The latch member 12 may include a plurality of hooks 121, and the hooks 121 may be spaced apart along the circumferential direction of the mounting hole 11 to fix the low voltage coil 2 at different positions in the circumferential direction.

Referring to fig. 3, the hook 121 may include a connecting arm 121a and a stopping arm 121b connected to each other, and the stopping arm 121b may be connected to the inner hole wall of the mounting hole 11 through the connecting arm 121 a. During assembly, the connecting wall 121a can axially stop the low-voltage coil 2 to prevent the low-voltage coil 2 from axially falling out of the mounting hole 11; the stop arm 121b can then radially stop the low voltage coil 2, so as to confine the low voltage coil 2 between the stop arm 121b and the inner bore wall. Alternatively, the hook 121 may include only the stop arm 121b, and in this case, the insulator 1b is required to axially stop the low-voltage coil 2 so as to prevent the low-voltage coil 2 from axially coming out of the mounting hole 11.

Further, in an assembled state, the inner wall of the low-voltage coil 2 and the stopping arm 121b can be radially abutted to ensure the reliability of radial positioning of the low-voltage coil 2, and meanwhile, the outer wall of the low-voltage coil 2 and the inner hole wall of the mounting hole 11 can be in clearance fit along the radial direction to form a heat dissipation air duct between the outer wall of the low-voltage coil 2 and the inner hole wall of the mounting hole 11. Like this, when specifically using, can also dispel the heat to high-tension coil injection molding 1 and low-tension coil 2 through the mode of air convection, can improve by bigger degree the utility model provides a heat dispersion of transformer.

In fact, besides the heat dissipation air duct between the outer wall of the low-voltage coil 2 and the inner wall of the mounting hole 11, a heat dissipation air duct may also be formed between the inner wall of the low-voltage coil 2 and the magnetic core 4.

It should be noted that, the scheme of 2 outer walls of low voltage coil and 11 interior pore wall clearance fit of mounting hole is only the utility model discloses a preferred scheme, but can not regard as right the utility model provides a limit to of the implementation scope of transformer, under the condition that satisfies 2 fixed reliability of low voltage coil, 2 outer walls of low voltage coil also can contact with 11 interior pore walls of mounting hole.

When the clamping member 12 is integrally formed with the insulator 1b, the clamping member 12 is also formed by injection molding, and in this case, in consideration of the smoothness of the mold release, the stopper arm 121b may have an easy-release wall surface which may have a relatively large draft angle to facilitate the separation of the injection-molded high-voltage coil injection molded body 1 from the mold. In the embodiment of fig. 5, the outer wall surface of the stopper arm 121b may extend in a vertical direction, and the inner wall surface of the stopper arm 121b may be gradually inclined inward from top to bottom to form the above-described easy-release wall surface.

In each of the above embodiments, the specific structure of the engagement member 12 is described by taking a split structure as an example. In addition, the latch member 12 may also be an integral structure, in this case, the latch member 12 may have an annular axial baffle, and the stop arms 121b may be mounted on the axial baffle; further, the stop arms 121b may be connected in the circumferential direction to form an annular radial stop.

With reference to fig. 4 and 5, the transformer provided by the present invention may further include an insulating stopper 3, and the insulating stopper 3 may be mounted on the insulator 1b, and is used for fixing another end portion (an upper end portion in fig. 5) of the low-voltage coil 2.

The insulating stop member 3 may include an axial stop 31 and a radial stop 32, the radial stop 32 may be mounted to the axial stop 31; the axial stopper 31 is mounted on the insulator 1b, specifically, the mounting manner is lock screw connection or the like, so as to facilitate disassembly and assembly, and the axial stopper 31 can axially stop the low-voltage coil 2, so as to prevent the low-voltage coil 2 from coming out of the mounting hole 11 in the axial direction; the radial stop 32 can be used to radially stop the low-voltage coil 2 in order to ensure a secure positioning of the low-voltage coil 2 in the high-voltage coil injection molded body 1.

The radial stopper 32 may position only the inner wall surface of the low-voltage coil 2, or may position both the inner wall surface and the outer wall surface. In the embodiment of fig. 4, the radial stopper 32 may include two annular baffles 321 that are sleeved with each other, and the two annular baffles 321 may respectively abut against and position the inner wall surface and the outer wall surface of the low-voltage coil 2, so that a radial gap may be reserved between the outer wall surface of the low-voltage coil 2 and the inner wall surface of the mounting hole 11.

It is understood that the annular baffle 321 is an integral radial stop 32, and in particular, the radial stop 32 may also be a split structure, for example, the radial stop 32 may include several stops arranged at intervals in the circumferential direction, and through the cooperation of the stops, the radial positioning of the low-voltage coil 2 may also be realized.

In the embodiment of the drawings, as shown in fig. 5, one end of the low voltage coil 2 may be positioned and assembled by the snap member 12, and the other end of the low voltage coil 2 may be positioned and assembled by the insulation stopper 3. In fact, the utility model provides a transformer also can not set up joint component 12, and then all sets up insulating stop part 3 at the axial both ends of low voltage coil 2 and carry out positioning assembly, and like this, also is feasible.

Further, the utility model provides a transformer can also include magnetic core 4, and magnetic core 4 at least part can be pegged graft in low tension coil 2 for increase magnetic induction intensity. The material and the specific structural form of the magnetic core 4 are not limited herein, and those skilled in the art can determine the material and the specific structural form in combination with the related art in practice.

Generally speaking, two high-voltage coils 1a are encapsulated in the high-voltage coil injection molding body 1 of the transformer, two mounting holes 11 can be formed, the low-voltage coils 2 are arranged in the two mounting holes 11, and the magnetic core 4 can be annular and can be inserted into the two low-voltage coils 2.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A transformer is characterized by comprising a high-voltage coil injection molding body (1) and a low-voltage coil (2), wherein the high-voltage coil injection molding body (1) comprises a high-voltage coil (1a) and an insulator (1b) which is injected to the high-voltage coil (1a), a mounting hole (11) is formed in the insulator (1b), the mounting hole (11) is located on the radial inner side of the high-voltage coil (1a), and the low-voltage coil (2) is mounted in the mounting hole (11).

2. Transformer according to claim 1, characterized in that the insulator (1b) is provided with a snap-in member (12) at one axial end of the mounting hole (11), the axial end of the low voltage coil (2) being fitted to the snap-in member (12).

3. The transformer according to claim 2, characterized in that the clamping member (12) comprises a plurality of hooks (121), and the hooks (121) are spaced apart along the circumference of the mounting hole (11).

4. The transformer according to claim 3, characterized in that the hook (121) comprises a connecting arm (121a) and a stop arm (121b) connected with each other, the stop arm (121b) is connected with the inner hole wall of the mounting hole (11) through the connecting arm (121a), and the low-voltage coil (2) is located between the stop arm (121b) and the inner hole wall.

5. Transformer according to claim 4, wherein the inner wall of the low voltage coil (2) is radially against the stop arm (121b) and the outer wall of the low voltage coil (2) is radially clearance fitted to the inner wall.

6. Transformer according to claim 4, wherein the stop arms (121b) have easy-release walls.

7. Transformer according to any of claims 1-6, further comprising an insulating stop (3), the insulating stop (3) being mounted to the insulator (1b) for fixing the low voltage coil (2).

8. Transformer according to claim 7, wherein the insulation stop (3) comprises an axial stop (31) and a radial stop (32), the radial stop (32) being mounted to the axial stop (31), the axial stop (31) being mounted to the insulator (1b), the radial stop (32) being adapted to radially stop the low voltage coil (2).

9. The transformer according to claim 8, characterized in that said radial stop (32) comprises two annular baffles (321) nested one inside the other.

10. A transformer according to any one of claims 1-6, characterized in that it further comprises a core (4), at least part of the core (4) being spliced to the low voltage coil (2).

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