A transformer with a supporting frame

Abstract

This utility model relates to a transformer with a supporting frame, including windings, a magnetic core, and an insulating cylinder. The insulating cylinder includes an inner cylinder sleeved on the magnetic core, an outer cylinder coaxially sleeved on the outside of the inner cylinder and spaced apart from it, and a supporting frame disposed between the inner cylinder and the magnetic core. The windings include a primary winding disposed on the outer wall of the inner cylinder and a secondary winding wound on the outer wall of the outer cylinder. The outer wall of the supporting frame is provided with air-guiding ribs. This utility model provides a supporting frame between the inner cylinder of the insulating cylinder and the magnetic core, thereby increasing the overall strength of the transformer's magnetic core, and the air-guiding ribs on the outer wall of the supporting frame provide space for heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and specifically to a transformer with a supporting frame. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components include the primary coil, the secondary coil, and the magnetic core.

[0003] A coaxial double-insulated transformer is a type of transformer with a special structure and insulation performance. Its primary and secondary windings have coincident axes and are typically used in applications requiring high electrical insulation. When the primary winding is connected to an AC power source, it generates an alternating magnetic field. This field, guided by the magnetic core, passes through the secondary winding, inducing an electromotive force in the secondary winding. This allows for the transfer of electrical energy from the primary to the secondary winding, and voltage transformation is achieved based on the winding turns ratio.

[0004] However, to achieve double insulation, a thicker insulation layer is required between the windings and between the windings and other components. This increases the size and weight of the transformer, making the overall structure less compact. In addition, some coaxial double-insulated transformers use a multi-stage split structure for the magnetic core. The split magnetic cores are all glued together, and the connection is made by the adhesive force of the glue. The overall strength of the magnetic core structure is relatively low. Under vibration or impact, the magnetic core components are prone to displacement or damage, affecting the normal operation of the transformer. Utility Model Content

[0005] The purpose of this utility model is to solve the technical problems of existing transformers, such as large size and weight, poor insulation, and low core strength. It provides a transformer that allows direct insulation between the primary and secondary windings through an insulating cylinder structure, solving the problem of large size and weight associated with encapsulated insulation. Furthermore, the overall strength is improved by setting up a supporting frame. The main concept is as follows:

[0006] To achieve the above objectives, this utility model provides a transformer with a supporting frame, including windings, a magnetic core, and an insulating cylinder. The insulating cylinder includes an inner cylinder sleeved on the magnetic core, an outer cylinder coaxially sleeved on the outside of the inner cylinder and spaced apart from the outside of the inner cylinder, and a supporting frame disposed between the inner cylinder and the magnetic core. The windings include a primary winding disposed on the outside of the inner cylinder and a secondary winding wound on the outside of the outer cylinder. A wind guide rib is provided on the outside of the supporting frame.

[0007] Preferably, the outer wall of the support frame is uniformly provided with a plurality of air guide ridges along the circumferential direction, and the air guide ridges are in contact with the inner wall of the inner cylinder.

[0008] Preferably, the air guide ribs are arranged along the axial direction of the support frame, and an air duct is formed between the support frame, the inner cylinder and the adjacent air guide ribs.

[0009] Preferably, the outer wall of the support frame is provided with a plurality of heat dissipation holes, and the plurality of heat dissipation holes are evenly arranged.

[0010] Preferably, the outer wall of the outer cylinder is provided with a plurality of mutually spaced protrusions evenly arranged along the axial direction, and the adjacent protrusions form a winding groove, and a secondary winding is arranged in the winding groove.

[0011] Preferably, the outer cylinder is provided with multiple sets of secondary windings, and the winding directions of adjacent secondary windings are opposite.

[0012] Preferably, the outer cylinder is provided with annular retaining edges at both ends, and the outer contour surface of the annular retaining edges is uniformly provided with a plurality of annular grooves along the axial direction.

[0013] Preferably, the insulating cylinder further includes a connecting support bar, which is disposed between the inner cylinder and the outer cylinder, and the two ends of the connecting support bar are respectively connected to the inner cylinder and the outer cylinder.

[0014] Preferably, the outer wall of the inner cylinder is provided with a plurality of connecting support strips evenly arranged in the circumferential direction.

[0015] Preferably, it also includes a bracket, with the magnetic core disposed on the top of the bracket; a fixing block for supporting the support frame is fixed to the side of the bracket.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. A support frame is set between the inner cylinder of the insulating cylinder and the magnetic core to improve the overall strength of the transformer core. Furthermore, air guide strips are set on the outer wall of the support frame to form a heat dissipation space for the magnetic core and improve its heat dissipation capacity.

[0018] 2. The primary winding and secondary winding are respectively fitted onto the inner and outer walls of the insulating cylinder, which are coaxially arranged. An air gap is formed by the difference in inner diameter between the inner and outer cylinders, achieving the insulation effect. This insulation structure makes the transformer small in size and light in weight. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a radial cross-sectional view of the structure of this utility model.

[0021] Figure 3 This is an axial cross-sectional view of the structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the supporting frame of this utility model.

[0023] Figure 5 This is a schematic diagram of the magnetic core of this utility model.

[0024] Figure 6 This is a cross-sectional view of the insulating cylinder of this utility model.

[0025] The reference numerals in the attached drawings include: 1. Primary winding; 2. Secondary winding; 3. Magnetic core; 4. Inner cylinder; 5. Outer cylinder; 51. Protrusion; 52. Annular flange; 53. Annular groove; 6. Support frame; 61. Air guide protrusion; 62. Heat dissipation hole; 7. Connecting support bar; 8. Bracket; 81. Fixing block. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0027] In this disclosure, unless otherwise stated, directional terms such as "inner" and "outer" are defined based on the contours of the corresponding components. Terms such as "first" and "second" used in this disclosure are for distinguishing one element from another and do not imply sequence or importance.

[0028] Example 1

[0029] like Figures 1-6 As shown, this embodiment provides a transformer with a supporting frame, including windings, a magnetic core 3, and an insulating cylinder. The insulating cylinder includes an inner cylinder 4 sleeved on the magnetic core 3, an outer cylinder 5 coaxially sleeved on the outside of the inner cylinder 4 and spaced apart from the outside of the inner cylinder 4, and a supporting frame 6 disposed between the inner cylinder 4 and the magnetic core 3. The windings include a primary winding 1 disposed on the outer wall of the inner cylinder 4 and a secondary winding 2 wound on the outer wall of the outer cylinder 5. The outer wall of the supporting frame 6 is provided with air guide ribs 61.

[0030] In this embodiment, a supporting frame 6 is added between the inner wall of the inner cylinder 4 and the magnetic core 3, thereby improving the overall strength of the magnetic core 3. The outer walls of the inner cylinder 4 and the outer cylinder 5, which are coaxially arranged, are wound with a primary winding 1 and a secondary winding 2, respectively. An air gap is formed between the inner cylinder 4 and the outer cylinder 5, and insulation is achieved through the air gap between the primary winding 1 and the secondary winding 2.

[0031] like Figure 4As shown, the outer wall of the support frame 6 is uniformly provided with a plurality of air guide ribs 61 along the circumferential direction, and the air guide ribs 61 are in contact with the inner wall of the inner cylinder 4. The air guide ribs 61 are arranged along the axial direction of the support frame 6, and an air channel is formed between the support frame 6, the inner wall of the inner cylinder 4 and the adjacent air guide ribs 61 to improve the heat dissipation of the magnetic core.

[0032] At least two air guide ribs 61 are symmetrically arranged on the outer wall of the support frame 6, so that the air guide ribs 61 can be evenly distributed on the outer wall of the support frame 6 and the inner wall of the inner cylinder 4 and fit them closely, so as to prevent the support frame 6 and the inner cylinder 4 from shaking. In this embodiment, six air guide ribs 61 are evenly arranged on the outer wall of the support frame 6.

[0033] An air duct is constructed between adjacent air guide ribs 61, so that the air guide ribs 61 can introduce flowing air between the inner cylinder 4 and the magnetic core 3 to achieve heat dissipation.

[0034] To further enhance the heat dissipation capacity of the magnetic core, a plurality of heat dissipation holes 62 are provided on the outer wall of the support frame 6, and the plurality of heat dissipation holes 62 are evenly arranged. The heat dissipation holes 62 can connect the air duct and the magnetic core 3, so that the heat generated by the magnetic core 3 can be dissipated through the air duct; in this embodiment, the heat dissipation holes 62 are evenly opened on the support frame 6, and the heat dissipation holes 62 are strip-shaped holes extending radially along the support frame 6, which can improve the local heat dissipation efficiency.

[0035] Example 2

[0036] Based on Example 1, such as Figures 1-6 As shown, in this embodiment, the outer wall of the outer cylinder 5 is uniformly provided with a plurality of mutually spaced protrusions 51 along the axial direction, and the adjacent protrusions 51 form a winding groove, and the secondary winding 2 is provided in the winding groove.

[0037] The outer cylinder 5 is provided with multiple sets of secondary windings 2, and the winding directions of adjacent secondary windings 2 are opposite. Setting the winding directions of adjacent secondary windings 2 in opposite directions can ensure that the voltage difference is at most only one voltage difference, and the inter-turn voltage and distributed capacitance of adjacent secondary windings are small.

[0038] To further enhance the insulation performance between the primary and secondary windings, annular flanges 52 are provided at both ends of the outer cylinder 5. The outer contour surface of the annular flanges 52 is uniformly provided with several annular grooves 53 along the axial direction. The annular flanges 52 at both ends of the outer cylinder 5, by providing the groove structure, are used to increase the creepage distance between the lead wires of the primary winding 1 and the lead wires of the secondary winding 2.

[0039] like Figure 3As shown, the outer wall of the inner cylinder in this embodiment is smooth and flat. The primary winding is made of copper foil and is wound on the outer wall of the inner cylinder. The secondary winding is made of fine copper wire and is wound in the winding groove formed between adjacent protrusions of the outer cylinder.

[0040] The insulating cylinder also includes a connecting support bar 7, which is disposed between the outer wall of the inner cylinder 4 and the inner wall of the outer cylinder 5. The two ends of the connecting support bar 7 are respectively connected to the inner cylinder 4 and the outer cylinder 5. Multiple connecting support bars 7 are evenly arranged on the outer wall of the inner cylinder 4 in the circumferential direction, so that the inner cylinder 4 and the outer cylinder 5 can maintain stable coaxial support.

[0041] The inner cylinder 4 and the outer cylinder 5 are positioned and fixed by the connecting support bar 7, so that after the inner cylinder 4 and the outer cylinder 5 are coaxially set, an air gap is formed between the inner cylinder 4 and the outer cylinder 5, and the primary winding 1 and the secondary winding 2 are insulated through the air gap.

[0042] In this embodiment, four sets of connecting support bars 7 are distributed radially along the insulating cylinder. The connecting support bars 7 are evenly arranged along the circumference of the inner cylinder 4, and the middle position of the connecting support bar 7 is hollow.

[0043] Example 3

[0044] Based on Example 1, such as Figures 1-3 As shown, this embodiment also includes a bracket 8, and the magnetic core 3 is disposed on the top of the bracket 8; a fixing block 81 for supporting the support frame 6 is fixed on the side of the bracket 8.

[0045] like Figure 5 As shown, the magnetic core 3 in this embodiment is formed by adhesive bonding of a multi-stage split structure. The magnetic core 3 as a whole is a closed frame-shaped circuit structure, with a semi-open frame and a cylinder. The cylinder penetrates the inner cylinder 4 of the insulating cylinder and is connected to the insulating cylinder to provide the magnetic circuit of the transformer.

[0046] In this embodiment, multiple separate cylinders located inside the inner cylinder 4 are glued together and then formed into a whole by a supporting frame 6, which enhances the overall strength of the multiple separate cylinders. The two ends of the semi-open frame are connected to the two ends of the cylinder, so that the magnetic core 3 forms a complete magnetic circuit. Furthermore, the distance from the cylindrical axis of the magnetic core 3 to one end of the parallel semi-open frame is greater than the outer diameter of the insulating cylinder.

[0047] The semi-open frame of the magnetic core 3 is positioned above the bracket 8 to provide stable support for the transformer.

[0048] like Figure 1 and Figure 3 As shown, the bracket 8 is positioned to match the semi-open frame of the magnetic core 3, and the semi-open frame of the magnetic core 3 is placed on top of the bracket 3.

[0049] To reduce the weight of the transformer, the bracket 3 adopts a Z-shaped sheet metal structure; in order to connect the mounting block 81, the top surface of the bracket 3 in this embodiment is bent near the insulating cylinder to form a mounting surface perpendicular to the surface downward.

[0050] like Figure 1 and Figure 3 As shown, in this embodiment, the fixing block 81 has a two-stage stepped structure. When the fixing block 81 is installed, the stepped surface faces upward. One side of the higher step of the fixing block 81 is fixedly connected to the mounting surface of the bracket 8 by screws, and one side of the lower step of the fixing block 81 abuts against the connecting support strip 7. The upper surface of the higher step of the fixing block 81 is connected to the support frame 6 exposed in the inner cylinder 4, which is used to provide vertical support for the support frame 6. At the same time, the fixing blocks 81 arranged opposite to each other at both ends of the bracket 3 abut against the two ends of the insulating cylinder, which can restrain the axial movement of the insulating cylinder.

[0051] The length of the support frame 6 and the magnetic core is greater than the length of the insulating cylinder. The support frame 6 and the magnetic core 3 extend beyond the two ends of the insulating cylinder along the axial direction. The extended portions of the support frame 6 and the magnetic core 3 at both ends of the insulating cylinder abut against the upper surface of the fixing block 81.

[0052] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A transformer with a support skeleton, comprising a winding, a magnetic core (3) and an insulating cylinder, characterized in that, The insulating cylinder includes an inner cylinder (4) sleeved on the magnetic core (3), an outer cylinder (5) coaxially sleeved on the outside of the inner cylinder (4) and spaced apart from the outside of the inner cylinder (4), and a support frame (6) disposed between the inner cylinder (4) and the magnetic core (3); the winding includes a primary winding (1) disposed on the outer wall of the inner cylinder (4) and a secondary winding (2) wound on the outer wall of the outer cylinder (5); the outer wall of the support frame (6) is provided with air guide ribs (61).

2. The transformer with support skeleton according to claim 1, characterized in that: The outer wall of the support frame (6) is uniformly provided with a plurality of air guide ridges (61) along the circumferential direction, and the air guide ridges (61) are in contact with the inner wall of the inner cylinder (4).

3. The transformer with support skeleton according to claim 2, characterized in that: The air guide ribs (61) are arranged along the axial direction of the support frame (6), and an air duct is formed between the support frame (6), the inner cylinder (4) and the adjacent air guide ribs (61).

4. The transformer with support skeleton according to claim 2, characterized in that: The outer wall of the support frame (6) is provided with a plurality of heat dissipation holes (62), and the plurality of heat dissipation holes (62) are evenly arranged.

5. The transformer with support skeleton according to claim 1, characterized in that: The outer wall of the outer cylinder (5) is uniformly provided with a plurality of mutually spaced protrusions (51) along the axial direction. Adjacent protrusions (51) form a winding groove, and a secondary winding (2) is provided in the winding groove.

6. The transformer with support skeleton according to claim 5, characterized in that: The outer cylinder (5) is provided with multiple sets of secondary windings (2), and the winding directions of adjacent secondary windings (2) are opposite.

7. The transformer with support skeleton according to claim 5, characterized in that: The outer cylinder (5) is provided with annular flanges (52) at both ends, and the outer contour surface of the annular flanges (52) is uniformly provided with a number of annular grooves (53) along the axial direction.

8. The transformer with support skeleton according to claim 1, characterized in that: The insulating cylinder also includes a connecting support bar (7), which is disposed between the inner cylinder (4) and the outer cylinder (5), and the two ends of the connecting support bar (7) are connected to the inner cylinder (4) and the outer cylinder (5) respectively.

9. The transformer with support skeleton according to claim 8, characterized in that: The outer wall of the inner cylinder (4) is provided with a plurality of connecting support bars (7) evenly arranged in the circumferential direction.

10. The transformer with support skeleton according to claim 1, characterized in that: It also includes a bracket (8), the magnetic core (3) is disposed on the top of the bracket (8); a fixing block (81) supporting the support frame (6) is fixed on the side of the bracket (8).

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