Heat dissipation framework structure of transformer

Abstract

The utility model discloses a heat dissipation framework structure of a transformer, which relates to the technical field of transformers and comprises a lower constraint piece, an upper constraint piece, a plurality of split bolts, a lower heat conduction piece and an upper heat conduction piece. The lower restraining piece and the upper restraining piece are combined with the split bolts through the hollowed-out design to form a gap, the air contact area is increased, and heat dissipation is promoted. The lower heat conduction piece and the upper heat conduction piece are inserted into the transformer magnetic core, heat is rapidly conducted to the surface of the heat dissipation framework, and heat discharge is accelerated through the first heat dissipation holes and the second heat dissipation holes. The heat conduction piece is made of copper or aluminum materials, the contact area is increased through the heat conduction fins, and the heat conduction efficiency is improved. The heat dissipation framework structure is simple and convenient to assemble, stable and reliable, the heat dissipation performance of the transformer is remarkably improved, the operating temperature is reduced, the stability and reliability are improved, the service life is prolonged, and the heat dissipation framework structure is suitable for the transformer with high power density and compact design.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field, concretely is a heat dissipation framework structure of transformer. BACKGROUND

[0002] In the current transformer structure design, the magnetic core and winding part usually adopt the encapsulation mode to assemble, this design mode although has improved the compactness of structure and electrical insulation performance of transformer to some extent, but also has brought the significant heat dissipation problem simultaneously, the specific performance is as follows:

[0003] 1, the encapsulation material (such as epoxy resin, insulating tape etc.) usually has lower thermal conductivity, they are wrapped in the magnetic core and winding outside, formed a layer of thermal resistance greater barrier, hinders the conduction of heat from inside to outside environment, and the encapsulation structure often makes the transformer internal space relatively closed, air circulation is severely limited, cannot form effective natural convection or forced convection, further reduces the heat dissipation efficiency;

[0004] 2, due to the poor heat dissipation, the heat of transformer interior (especially the magnetic core and winding part) is easy to accumulate, leads to local temperature rise. Long-term high-temperature operation can accelerate the aging of insulating material, reduces the service life of transformer, and temperature rise also can affect the electrical performance of transformer, such as increasing copper loss, iron loss etc., leads to efficiency drop, and even can cause safety accidents;

[0005] 3, part of transformer although sets up the cooling fin, but the number, area or layout of cooling fin is unreasonable, cannot fully utilize air circulation to dissipate heat, and some heat dissipation materials (such as aluminum cooling fin etc.) although have certain heat dissipation capacity, but in high power density, high temperature environment, its heat dissipation effect often is difficult to meet the actual demand. UTILITY MODEL CONTENTS

[0006] In view of the deficiency of prior art, the utility model provides a heat dissipation framework structure of transformer, solves the heat dissipation problem of existing transformer caused by encapsulation structure.

[0007] To realize above-mentioned purpose, the utility model is realized through following technical scheme: a heat dissipation framework structure of transformer, including lower constraint piece, upper constraint piece, a plurality of tension bolts, lower heat conduction piece and upper heat conduction piece, the lower constraint piece and upper constraint piece are assembled at the both ends of transformer through the tension bolt, and the lower constraint piece and upper constraint piece are all hollow structure, the lower heat conduction piece and upper heat conduction piece are arranged between lower constraint piece and upper constraint piece respectively, and the lower heat conduction piece and upper heat conduction piece can be inserted to the inside of transformer magnetic core.

[0008] Further, the lower constraint comprises symmetrically arranged bases connected by symmetrically arranged bridges, and step grooves are arranged in the interiors of the bases and the bridges, which are used to support and constrain the positions of the lower heat-conducting members.

[0009] Further, the interior of the upper constraint is symmetrically provided with first heat dissipation holes, and the front and rear sides of the upper constraint are symmetrically provided with downward right-angle flanges, which are used to constrain the positions of the upper heat-conducting members, and the first heat dissipation holes are used for ventilation and heat dissipation.

[0010] Further, a plurality of lower through holes are symmetrically arranged on the outer side of the base, a plurality of upper through holes are symmetrically arranged on the two sides of the upper constraint, the two ends of the draw bolt are correspondingly inserted into the interiors of the lower through holes and the upper through holes, and the draw bolt is fastened by a nut, so that the lower constraint and the upper constraint are oppositely constrained.

[0011] Further, the lower heat-conducting member and the upper heat-conducting member have the same structure and are made of copper or aluminum, and the upper heat-conducting member comprises a heat-conducting plate clamped in the interior of the upper constraint, the bottom end of the heat-conducting plate is connected with a plurality of heat-conducting fins, and the heat-conducting fins are inserted into the interior of the transformer magnetic core.

[0012] Further, a second heat dissipation hole is arranged in the interior of the heat-conducting plate, the second heat dissipation hole is in communication with a reserved cavity of the transformer magnetic core, so that air flow is allowed to flow through the interior of the transformer magnetic core, and the heat dissipation effect is enhanced.

[0013] The utility model provides a heat dissipation framework structure of transformer, has the following beneficial effects compared with prior art:

[0014] The heat dissipation framework structure of transformer, through the unique open -work design and the clever layout of lower heat -conducting member and upper heat -conducting member, has improved the heat dissipation efficiency remarkably. Specifically, the open -work structure of lower constraint and upper constraint combines the clearance formed around the draw bolt, greatly increases the contact area of air and transformer, and promotes the rapid emission of heat. At the same time, the lower heat-conducting member and the upper heat-conducting member can be directly inserted into the interior of the transformer magnetic core, rapidly conducting the heat to the surface of the heat dissipation framework, and further accelerating the heat discharge through the first heat dissipation hole and the second heat dissipation hole. This design effectively solves the heat dissipation problem caused by the packaging structure of the existing transformer, significantly reduces the temperature of the transformer during operation, improves its stability and reliability, and prolongs the service life. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a split structure schematic view of the utility model;

[0016] Figure 2 It is a structure schematic view of upper constraint and lower constraint in the utility model;

[0017] Figure 3 It is the structural schematic view of the upper heat conduction piece in the utility model;

[0018] Figure 4 It is the assembly structure schematic view of the utility model;

[0019] Figure 5 It is the half sectional view of the utility model after assembling with the transformer.

[0020] In the drawing: 1, lower constraint piece; 11, base; 12, bridge; 13, stepped groove; 14, lower through hole; 2, upper constraint piece; 21, first heat dissipation hole; 22, right-angle hem; 23, upper through hole; 3, lower heat conduction piece; 4, upper heat conduction piece; 41, heat conduction plate; 42, heat conduction fin; 43, second heat dissipation hole; 5, tension bolt; 6, transformer magnetic core; 61, heat conduction cavity; 7, transformer winding. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] Please refer to Figures 1-4 The utility model provides a technical scheme: a heat dissipation framework structure of transformer, mainly by lower constraint piece 1, upper constraint piece 2, several tension bolts 5, lower heat conduction piece 3 and upper heat conduction piece 4 are composed, the specific structure and preparation mode of each component are as follows:

[0023] Lower constraint piece 1 includes symmetrically arranged base 11, is connected through the bridge 12 of symmetric arrangement between base 11, the inside of base 11 and bridge 12 is reserved and set stepped groove 13, the design of stepped groove 13 not only can prop up lower heat conduction piece 3, still can accurately constrain the position of lower heat conduction piece 3, ensure its stability in the process of assembling and using;

[0024] The first heat dissipation hole 21 is symmetrically opened in the inside of upper constraint piece 2, the design of these heat dissipation holes can quickly ventilate and dissipate heat, improve the heat dissipation efficiency of entire heat dissipation framework structure, the front and rear sides of upper constraint piece 2 are provided with the right-angle hem 22 of downward, when upper heat conduction piece 4 is assembled in the inside of upper constraint piece 2, the right-angle hem 22 can constrain the position of upper heat conduction piece 4, prevent its displacement in the process of using;

[0025] The base 11 is symmetrically provided with a plurality of lower through holes 14 on the outer side, and the upper constraint member 2 is symmetrically provided with a plurality of upper through holes 23 on both sides. The ends of the tension bolts 5 are correspondingly inserted into the lower through holes 14 and the upper through holes 23, and then the nuts are screwed, so as to form the opposite constraint force of the lower constraint member 1 and the upper constraint member 2, thereby ensuring the stability of the entire heat dissipation framework structure.

[0026] The lower heat conduction member 3 and the upper heat conduction member 4 are the same in structure and are made of copper or aluminum, thereby having good heat conduction performance.

[0027] The upper heat conduction member 4 includes a heat conduction plate 41 clamped in the upper constraint member 2, and the bottom end of the heat conduction plate 41 is connected with a plurality of heat conduction fins 42. The heat conduction fins 42 are designed to increase the contact area with the transformer magnetic core and improve the heat conduction efficiency. The inside of the heat conduction plate 41 is reserved with a second heat dissipation hole 43, which is correspondingly communicated with the reserved cavity of the transformer magnetic core, so that the airflow can flow from the inside of the transformer magnetic core, thereby further enhancing the heat dissipation effect.

[0028] When the heat dissipation framework structure is assembled on the transformer, the specific steps are as follows

[0029] Firstly, the heat conduction fins 42 of the lower heat conduction member 3 and the upper heat conduction member 4 are respectively inserted into the heat conduction cavities 61 of the transformer magnetic core 6, and the heat conduction fins 42 are ensured to be in close contact with the transformer magnetic core 6, so as to form a good heat conduction path.

[0030] Then, the lower constraint member 1 and the upper constraint member 2 are correspondingly assembled on the outside of the lower heat conduction member 3 and the upper heat conduction member 4. During the assembly process, it is noted that the stepped grooves 13 of the lower constraint member 1 and the upper constraint member 2 are aligned with the corresponding parts of the lower heat conduction member 3 and the upper heat conduction member 4, so as to ensure the accurate position of the heat conduction member.

[0031] Then, a plurality of tension bolts 5 are inserted into the lower through holes 14 and the upper through holes 23, and the nuts of the tension bolts 5 are screwed. During the screwing process, it is noted that the opposite constraint force between the lower constraint member 1 and the upper constraint member 2 is moderate, neither too tight nor too loose, so as to ensure the stability and heat dissipation effect of the entire heat dissipation framework structure.

[0032] After the assembly is completed, the heat dissipation framework structure can significantly improve the heat dissipation effect of the transformer during use. The specific performance is as follows:

[0033] Since the lower constraint member 1, the upper constraint member 2 and the plurality of tension bolts 5 are all formed with a hollow structure, the air can fully contact the transformer for heat conduction, thereby increasing the heat dissipation area.

[0034] The heat-conducting fins 42 of the lower heat-conducting member 3 and the upper heat-conducting member 4 can quickly conduct the heat generated by the transformer magnetic core 6 and the transformer winding 7 to the heat-conducting plate 41, and then discharge it through the first heat dissipation holes 21 and the second heat dissipation holes 43. This design enables the heat to be quickly conducted out of the transformer, improving the heat conduction efficiency;

[0035] The second heat dissipation holes 43 inside the heat-conducting plate 41 are in communication with the reserved cavity of the transformer magnetic core, enabling the airflow to flow from the inside of the transformer magnetic core, further enhancing the heat dissipation effect. This design enables the transformer to maintain a relatively low temperature during a long working process, improving its stability and reliability.

Claims

1. A heat dissipating skeleton structure of a transformer, characterized by comprising: The utility model relates to a transformer magnetic core cooling device, including lower restraint (1), upper restraint (2), a plurality of opposite pull bolt (5), lower heat conduction piece (3) and upper heat conduction piece (4), lower restraint (1) and upper restraint (2) are assembled in the both ends of transformer through opposite pull bolt (5), and lower restraint (1) and upper restraint (2) are both hollow structure, lower heat conduction piece (3) and upper heat conduction piece (4) are set up between lower restraint (1) and upper restraint (2) respectively, and lower heat conduction piece (3) and upper heat conduction piece (4) can be inserted to the inside of transformer magnetic core.

2. The heat dissipation skeleton structure of a transformer according to claim 1, characterized in that, The lower restraint (1) includes symmetrically arranged base (11), the base (11) is connected by symmetrically arranged bridge (12) between the base (11), the inside of the base (11) and bridge (12) is reservedly provided with step groove (13), and the step groove (13) is used to hold up and constrain the position of the lower heat conduction piece (3).

3. The heat dissipating skeleton structure of a transformer according to claim 1, wherein, The inside of the upper restraint (2) is symmetrically provided with first heat dissipation hole (21), and the front and rear sides of the upper restraint (2) are provided with downward right-angle hem (22), the right-angle hem (22) is used to constrain the position of the upper heat conduction piece (4), and the first heat dissipation hole (21) is used for ventilation and heat dissipation.

4. The heat dissipating skeleton structure of a transformer according to claim 2, wherein The outside of the base (11) is symmetrically provided with a plurality of lower through holes (14), the both sides of the upper restraint (2) are symmetrically provided with a plurality of upper through holes (23), the both ends of the opposite pull bolt (5) are correspondingly inserted in the inside of the lower through hole (14) and the upper through hole (23), and are tightened by the nut, so as to form the opposite constraint force to the lower restraint (1) and the upper restraint (2).

5. The heat dissipating skeleton structure of a transformer according to claim 1, wherein, The lower heat conduction piece (3) and the upper heat conduction piece (4) are same in structure, and are copper or aluminum structure, the upper heat conduction piece (4) includes heat conduction plate (41) clamped in the inside of the upper restraint (2), the bottom end of the heat conduction plate (41) is connected with a plurality of heat conduction fins (42), and the heat conduction fin (42) is inserted in the inside of transformer magnetic core.

6. A heat dissipating skeleton structure of a transformer according to claim 5, wherein The inside of the heat conduction plate (41) is reservedly provided with second heat dissipation hole (43), the second heat dissipation hole (43) is correspondingly communicated with the reserved cavity of transformer magnetic core, so as to allow airflow to flow from the inside of transformer magnetic core, and strengthen the heat dissipation effect.

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