CN112652464A

CN112652464A - High-efficient radiating embedment class transformer

Info

Publication number: CN112652464A
Application number: CN202011592038.4A
Authority: CN
Inventors: 周华春
Original assignee: Chongqing College of Electronic Engineering
Current assignee: Chongqing College of Electronic Engineering
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-04-13

Abstract

The invention belongs to the technical field of solid or powdery filler heat conduction cooling, and discloses a high-efficiency heat-dissipation encapsulated transformer which comprises a product body, an encapsulating adhesive and a shell which are sequentially arranged from inside to outside, wherein a heat conduction module is fixed on the product body, a heat conduction pipe is connected onto the heat conduction module, a connecting component is arranged on the inner side of the shell, a connecting hole is formed in the connecting component, and one end, far away from the heat conduction module, of the heat conduction pipe is inserted into the connecting hole. The invention solves the problem that the production cost of the encapsulated transformer with good heat dissipation effect is high because the heat dissipation effect of the encapsulated transformer is improved by replacing the expensive encapsulating glue at present.

Description

High-efficient radiating embedment class transformer

Technical Field

The invention belongs to the technical field of heat conduction and cooling through solid or powdery fillers, and particularly relates to an efficient heat dissipation encapsulated transformer.

Background

The encapsulated transformer is formed by pouring and sealing glue outside a product body, has the characteristics of extremely high antifouling grade, pressure-resistant grade and earthquake-resistant grade, and is widely applied to industries with special requirements on application environments, such as rail transit, outdoor photovoltaic and the like. The potting transformer generally comprises a product body, potting glue and an aluminum shell which are wrapped from inside to outside. The pouring sealant wraps the product transformer body to play a role in improving the antifouling grade, the pressure-resistant grade and the anti-seismic grade, and can also distribute heat generated by the product transformer body during operation through the aluminum shell connected with the product transformer body through the heat conduction performance of the pouring sealant so as to meet the temperature rise performance of the transformer; meanwhile, the hardness of the pouring sealant determines the noise index of the product caused by vibration at low frequency. Therefore, each performance index of the pouring sealant plays an important role in the reliability of the transformer.

When the transformer runs, heat dissipation is very important, and when the transformer runs for a long time and generates heat, the running speed of internal parts is reduced, even the internal parts are damaged; it is therefore desirable to have very good heat dissipation performance. The heat dissipation performance of the potting transformer is realized through the performance of the potting adhesive, the heat dissipation performance of the potting adhesive is good, the heat dissipation effect of the prepared potting transformer is good, the operation stability is good, and the service life is long. However, the cost of the potting adhesive is very high, reaching hundreds or even thousands yuan per kilogram, which leads to high production cost and high selling price of the potting transformer with good performance.

Therefore, the inventor breaks through the conventional thought that the improvement on the potting adhesive is inconvenient and develops a potting transformer which has lower cost and can efficiently dissipate heat.

Disclosure of Invention

The invention aims to provide an efficient heat-dissipation potting transformer to solve the problem that the production cost of the potting transformer with good heat dissipation effect is high because the heat dissipation effect of the potting transformer is improved by replacing expensive potting adhesive at present.

In order to achieve the purpose, the invention provides the following technical scheme that the high-efficiency heat-dissipation encapsulation transformer comprises a product body, an encapsulation adhesive and a shell which are sequentially arranged from inside to outside, wherein a heat conduction module is fixed on the product body, a heat conduction pipe is connected onto the heat conduction module, a connection assembly is arranged on the inner side of the shell, a connection hole is formed in the connection assembly, and one end, far away from the heat conduction module, of the heat conduction pipe is inserted into the connection hole.

The technical principle of the technical scheme is as follows:

the pouring sealant guides heat on the product device body to the heat conduction module and conducts the heat through the heat conduction pipe, and the heat conduction pipe is inserted into the connecting hole of the connecting component, so that the heat conduction pipe guides the heat to the connecting component and distributes the heat through the shell connected with the connecting component, and the heat generated when the transformer operates is distributed.

The beneficial effects of the technical scheme are as follows:

1. according to the technical scheme, the heat dissipation effect is improved by combining the heat dissipation of the pouring sealant with the heat dissipation of the heat conduction module, the heat conduction pipe and the connecting assembly;

2. compared with the prior art, the heat conduction module, the heat conduction pipe and the connecting assembly are arranged for heat dissipation, the pouring sealant with better heat dissipation effect is replaced, the cost is lower, and the production cost of the whole transformer is reduced.

In conclusion, the heat dissipation structure is used for dissipating heat through the combination of the pouring sealant and the heat dissipation structure, so that the heat dissipation effect can meet the use requirement. Meanwhile, the production cost of the potting transformer can be reduced.

The inventor researches based on the original potting transformer, and finds that the types of potting adhesive are changed for the improvement of the heat dissipation performance of the potting transformer at present, but under the condition that other performances are kept the same, the heat dissipation performance is better, the cost of the potting adhesive is higher, and the price difference can reach hundreds or even thousands per kilogram; this results in a very high selling price for potted transformers with good heat dissipation.

Therefore, the inventor breaks through the concept in the research and development process, and the heat generated during the operation of the product body is guided to the shell by designing the heat dissipation structure and then dissipated through the shell, so that the heat dissipation effect is ensured to be good under the condition of the heat dissipation double pipes of the pouring sealant. Experiments prove that after the structure provided by the technical scheme is used, the heat dissipation effect of the potting transformer is good, and meanwhile, the production cost is low.

Further, the heat conduction pipes are arranged in an S shape continuously.

Has the advantages that: set up the heat pipe into the S type, arrange with the straight line and compare, can promote whole mobile route, consequently can absorb more heat and transmit for radiating effect promotes.

Furthermore, the inside of heat conduction module is equipped with the cavity, still includes a honeycomb duct that runs through shell, casting glue and heat conduction module in proper order and communicate with the cavity, and the heat pipe is cavity, and the heat pipe also communicates with the cavity.

Has the advantages that: set up the cavity in heat conduction module to set up the heat pipe into cavity, communicate the honeycomb duct again, can realize that gas flows along honeycomb duct, cavity and heat pipe in proper order, and then takes place the heat exchange with the inside heat of embedment class transformer, thereby cool down, dispel the heat to embedment class transformer.

Furthermore, one end of the flow guide pipe communicated with the outside is provided with an impeller, a rotating shaft is coaxially fixed on the impeller, and a plurality of rotating blades are fixed on the rotating shaft.

Has the advantages that: when gas flows outside, the gas can impact the rotating blades, so that the rotating blades drive the rotating shaft and the impeller to rotate, the outside gas is guided into the guide pipe and flows along the guide pipe, the cavity and the heat conducting pipe, heat exchange is carried out between the outside gas and heat generated when the product body runs, and the heat dissipation effect is improved.

Furthermore, an annular cavity wrapped outside the flow guide pipe and a flow guide channel communicated with the inner side of the annular cavity are arranged in the pouring sealant, and the flow guide channel is annular; the flow guide pipe comprises an air guide section communicated with the cavity and an air inlet section communicated with the outside, an annular gap is formed between the air inlet section and the air guide section, and the annular gap is communicated with the flow guide channel; the air inlet pipe penetrates through the shell and the pouring sealant, is communicated with the annular cavity and is provided with an air inlet piece; the amount of gas flowing in the diversion passage per unit time is less than the amount of gas flowing in the air inlet pipe per unit time.

Has the advantages that: honeycomb duct and annular chamber form the air amplifier structure among this technical scheme, and when leading-in gas in to the inlet tube through the air inlet spare, gaseous water conservancy diversion to the annular chamber in, in the leading-in air guide section of rethread water conservancy diversion passageway and breach, because the amount of gas that flows in the unit interval is less than the amount of gas that flows in the inlet tube unit interval in the water conservancy diversion passageway, consequently, gaseous in-process of continuously leading-in annular chamber, can be through water conservancy diversion passageway high pressure, in the fast leading-in water conservancy diversion section, and then according to air amplifier's theory of operation, through the quick outside gas of inhaling of inlet section, realize in the quick entering cavity of a large amount of gas, flow along.

Further, the air inlet piece comprises a mounting frame coaxially fixed on the air inlet pipe, cooling blades for guiding external air into the air inlet pipe are arranged on the mounting frame, and a rotating shaft is coaxially fixed on the mounting frame; the magnetic pole of one side that the drive shaft kept away from is the same, and the shell outside is located the top of drive shaft and is equipped with the second magnetic path with first magnetic path inter attraction, is located the below of drive shaft and is equipped with the third magnetic path with first magnetic path inter repulsion.

Has the advantages that: when the axis of rotation is vertical, the first magnetic path of bottom is rejected to the third magnetic path, and the first magnetic path at second magnetic path attraction top to make drive shaft rebound, and at rebound's in-process, the drive shaft receives outside air current's influence can take place the swing, and the length of the drive shaft of upside has longer, consequently realizes the drive shaft rotation under the action of gravity of the drive shaft of upside, and then drives the axis of rotation and rotates, makes the cooling blade rotate and with the leading-in annular chamber of outside air current. And then realize follow-up gaseous through the section of admitting air suction, realize the heat dissipation.

The device further comprises a driving barrel fixed on the shell, one end of the driving barrel facing the rotating shaft is opened, a piston is connected in the driving barrel in a transverse sliding mode, a spring is arranged between the piston and the driving barrel, and inert gas is injected into the driving barrel; the piston is also fixed with a connecting rod, and the first magnetic block and the second magnetic block are both fixed on the connecting rod.

Has the advantages that: when the generated heat is less, the heat dissipation can be completed only by the gas flow generated when the impeller rotates. After the transformer moved for a long time, the heat increase of production, the radiating effect that only the gas flow that produces through the impeller brought is not enough to satisfy actual demand, the temperature is higher this moment, according to expend with heat and contract with cold's principle, the inert gas inflation, and then promote first magnetic path and second magnetic path and remove to being close to the actuating lever direction, and be located the upper and lower both sides of actuating lever, thereby realize leading-in gas in to the intake pipe, accomplish the operation of air amplifier structure, increase gaseous velocity of flow and flow, promote radiating effect.

Furthermore, a plurality of heat dissipation toothed plates are arranged at the two ends of the shell.

Has the advantages that: the heat dissipation toothed plate is arranged, so that the heat dissipation area can be increased, and the heat dissipation effect is improved.

Further, the housing is an aluminum housing of 6063T 5.

Has the advantages that: the 6063T5 aluminum alloy material has the heat conductivity coefficient of about 201W/m.K, and has the advantages of good heat dissipation effect, good processability, easy surface treatment and low cost.

Drawings

Fig. 1 is a schematic structural diagram of a housing of an efficient heat-dissipating potting transformer according to the present invention;

FIG. 2 is a longitudinal cross-sectional view of the present invention;

FIG. 3 is a schematic view of the arrangement of the heat pipes in the present invention;

FIG. 4 is a partial cross-sectional view of the present invention;

fig. 5 is a longitudinal sectional view of the driving bucket in the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the heat dissipation device comprises a shell 1, a wire outlet hole 11, a connecting assembly 12, a connecting hole 121, a heat dissipation toothed plate 13, an installation block 14, an installation hole 141, potting glue 2, an annular cavity 21, a flow guide channel 22, a product body 3, a heat conduction module 4, a cavity 41, a heat conduction pipe 42, a flow guide pipe 43, an air guide section 431, an air inlet section 432, an impeller 5, a rotating shaft 51, a rotating blade 52, an air inlet pipe 6, an installation frame 7, a cooling blade 71, a rotating shaft 72, a driving shaft 8, a first magnetic block 81, a driving barrel 9, a piston 91, a connecting rod 92, a second magnetic block 921 and a third magnetic.

Example (b):

an efficient heat-dissipation encapsulated transformer is basically shown in figure 1 and comprises a product transformer body 3, an encapsulating adhesive 2 and a shell 1 which are sequentially arranged from inside to outside. Vertical connecting components 12 are arranged at two inner top corners of the rear side of the shell 1, and vertical connecting holes 121 are formed in the connecting components 12; a plurality of radiating toothed plates 13 are fixed at the left end and the right end of the shell 1; a plurality of wire outlet holes 11 are formed in the front side wall of the shell 1, the product body 3 is electrically connected with a wire outlet, and the wire outlet holes 11 are used for leading out the wire outlet which is electrically connected with the product body 3; the front side and the rear side of the bottom of the shell 1 are both fixed with mounting blocks 14, and the mounting blocks 14 are provided with a plurality of mounting holes 141 for mounting the transformer during use. The housing 1 is an aluminum housing 1 of 6063T 5.

Referring to fig. 2, a heat conducting module 4 is fixed on the top of the product body 3, and a heat conducting pipe 42 is connected to the heat conducting module 4. In this embodiment, two heat pipes 42 are provided, and the two heat pipes 42 are respectively located at the left and right sides of the heat conducting module 4; referring to fig. 3, the heat pipes 42 are all arranged in a continuous S shape, and the heat pipes 42 are embedded in the upper portion of the potting adhesive 2. One ends of the two heat pipes 42 far away from the heat conducting module 4 are respectively inserted into the connecting holes 121 of the two connecting assemblies 12 and penetrate through the bottom of the housing 1.

The heat conducting module 4 has a cavity 41 therein, the heat conducting pipe 42 is hollow, and the heat conducting pipe 42 is communicated with the cavity 41 of the heat conducting module 4. Still include one and run through shell 1 rear side wall, casting glue 2 and heat conduction module 4 and extend to the honeycomb duct 43 in the cavity 41, honeycomb duct 43 and cavity 41 intercommunication, combine and show in fig. 4, be fixed with impeller 5 on the right-hand member inner wall of honeycomb duct 43, impeller 5 is including coaxial mounting ring of fixing in honeycomb duct 43 and a plurality of support bars of setting in the mounting ring, form the through-hole coaxial with honeycomb duct 43 between the many support bars, the through-hole internal rotation is connected with pivot 51, honeycomb duct 43 is stretched out to pivot 51's right-hand member, the left end of pivot 51 still is equipped with guide vane on being located the inboard part of mounting ring, guide vane can inhale outside gas when rotating. A plurality of rotor blades 52 are fixed to the right end of the rotating

shaft

51, and 3 rotor blades 52 are provided in this embodiment. In order to reduce weight, the rotating shaft 51, the rotating blades 52 and the guide vanes are all hollow in the embodiment, so that the rotating blades 52 can drive the rotating shaft 51 and the guide vanes to rotate under the condition of small gas flow.

The pouring sealant 2 is internally provided with an annular cavity 21 wrapped outside the flow guide pipe 43 and a flow guide channel 22 communicated with the inner wall of the annular cavity 21, and the flow guide channel 22 is annular. The guide pipe 43 comprises an air guide section 431 at the left side and an air inlet section 432 at the right side, and an annular gap is formed between the air guide section 431 and the air inlet section 432 and is communicated with the guide channel 22. The guide passage 22 is obliquely arranged, and the guide passage 22 is obliquely arranged from outside to inside toward the left.

The air inlet pipe 6 penetrates through the rear side wall of the shell 1 and the pouring sealant 2 and is communicated with the annular cavity 21, the amount of gas flowing in the diversion channel 22 in unit time is smaller than that of gas flowing in the air inlet pipe 6 in unit time, namely the air inflow of the air inlet pipe 6 is larger than that of the air outflow of the diversion channel 22. The air inlet pipe 6 is provided with an air inlet part, and the air inlet pipe 6 and the air inlet part are both arranged below the flow guide pipe 43.

The air inlet part comprises an installation frame 7 which is coaxially fixed in the air inlet pipe 6, a cooling blade 71 is rotatably connected to the installation frame 7, and when the cooling blade 71 rotates, the air outside can be guided into the air inlet pipe 6. A rotating shaft 72 is coaxially fixed on the mounting frame 7, and the cooling blades 71 are fixed on the rotating shaft 72. The magnetic driving device further comprises a driving shaft 8 vertically penetrating through the rotating shaft 72, the top and the bottom of the driving shaft 8 are respectively fixed with the first magnetic block 81, so that the anti-falling effect can be achieved, the driving shaft 8 and the rotating shaft 72 are prevented from falling off, and the magnetic poles of the top surface of the first magnetic block 81 at the top and the bottom surface of the first magnetic block 81 at the bottom are the same.

As shown in fig. 5, a driving tub 9 is fixed to the rear side of the housing 1, and the driving tub 9 is located at the front side of the intake duct 6 (with reference to fig. 4). Drive barrel 9 has piston 91 towards the one end opening of drive shaft 8, and lateral sliding connection has in the drive barrel 9, and the left surface welding of piston 91 has the spring, and the left end welding of spring is at the left medial surface of drive barrel 9, and the spring is the pressure spring in this embodiment, and concrete model selects according to the actual demand. The driving barrel 9 is filled with inert gas at the left side of the piston 91, and the type and amount of the inert gas are selected according to actual requirements.

A connecting rod 92 is fixed on the right side of the piston 91, the connecting rod 92 comprises a moving rod connected with the piston 91 and a U-shaped rod fixed at the right end of the moving rod, the opening of the U-shaped rod faces to the right, a second magnetic block 921 mutually attracted with the first magnetic block 81 is arranged at the top of the U-shaped rod, and a third magnetic block 922 mutually repelled with the first magnetic block 81 is fixed at the bottom of the U-shaped rod.

The specific implementation process is as follows:

when the potting transformer is used, heat is generated by the operation of the product body 3. The generated heat can be dissipated through the pouring sealant 2; meanwhile, the heat generated by the product body 3 can be partially absorbed by the heat conduction module 4 and guided by the heat conduction pipe 42, and the heat conduction pipe 42 can absorb more heat in the process of guiding the heat, and guides the heat to the connection assembly 12, and transfers the heat to the shell 1, so that the heat is dissipated through the shell 1.

When gas flows in the use environment, the rotating blade 52 is blown to drive the rotating shaft 51 and the guide vanes to rotate, so that the external gas is guided into the guide pipe 43, flows into the cavity 41 in the heat conducting module 4 along the guide pipe 43, and then flows along the heat conducting pipe 42. Because the temperature of the external gas is low, the gas can exchange heat with the product body 3 and the pouring sealant 2 with high temperature in the flowing process, and heat dissipation is realized. The gas after heat exchange is discharged through the end of heat transfer pipe 42.

Through the process, triple heat dissipation can be achieved for the encapsulation transformer, and the heat dissipation effect is improved.

After the potting transformer is used for a long time, the heat dissipation effect is limited, so that the temperature of the transformer body 3, the potting adhesive 2 and the shell 1 of the product is increased, the inert gas in the driving barrel 9 expands according to the heat expansion and cold contraction, the inert gas drives the piston 91 to move towards the direction close to the driving shaft 8, the second magnetic block 921 is located above the driving shaft 8, and the third magnetic block 922 is located below the driving shaft 8. At this time, since the second magnetic block 921 attracts the upper first magnetic block 81, the third magnetic block 922 repels the lower first magnetic block 81, thereby moving the driving shaft 8 upward. The driving shaft 8 is deflected by vibration of the transformer which moves during use and driving force of the driving shaft 8 when external airflow flows; and the length of the upper end of the driving shaft 8 is large, the gravity of the driving shaft is large, and when the driving shaft deflects, the driving shaft 51 is driven to rotate, so that the cooling blades 71 are driven to rotate, and the external gas is guided into the gas inlet pipe 6 and then enters the annular cavity 21.

Because the structure of the air amplifier is formed between the annular cavity 21 and the draft tube 43, and the air input of the air inlet pipe 6 is greater than the air output of the diversion channel 22, therefore, the high pressure of the air can be realized, the high speed can be realized, the air can enter the draft tube 43, according to the operation principle of the air amplifier, the air can be quickly sucked into the external air through the air inlet section 432 of the draft tube 43, the quick flowing of the air along the draft tube 43, the cavity 41 and the heat conducting pipe 42 in the heat conducting module 4 can be realized, the quick heat dissipation can be further.

It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention, and these changes and modifications should not be construed as affecting the performance of the invention and its practical application.

Claims

1. The utility model provides a high-efficient radiating embedment class transformer, includes product ware body, embedment glue and the shell that sets gradually from inside to outside, its characterized in that: be fixed with the heat conduction module on the product ware body, be connected with the heat pipe on the heat conduction module, the inboard of shell is equipped with coupling assembling, is equipped with the connecting hole on the coupling assembling, and the one end that the heat conduction module was kept away from to the heat pipe inserts in the connecting hole.

2. The efficient heat dissipation potting-type transformer of claim 1, wherein: the heat conduction pipes are arranged in an S shape continuously.

3. The efficient heat dissipation potting-type transformer of claim 2, wherein: the inside of heat conduction module is equipped with the cavity, still includes a honeycomb duct that runs through shell, casting glue and heat conduction module in proper order and communicate with the cavity, and the heat pipe is cavity, and the heat pipe also communicates with the cavity.

4. The efficient heat dissipating potting-like transformer of claim 3, wherein: the end of the flow guide pipe communicated with the outside is provided with an impeller, a rotating shaft is coaxially fixed on the impeller, and a plurality of rotating blades are fixed on the rotating shaft.

5. The efficient heat dissipation potting-type transformer of claim 4, wherein: an annular cavity wrapped outside the guide pipe and a guide channel communicated with the inner side of the annular cavity are arranged in the pouring sealant, and the guide channel is annular; the flow guide pipe comprises an air guide section communicated with the cavity and an air inlet section communicated with the outside, an annular gap is formed between the air inlet section and the air guide section, and the annular gap is communicated with the flow guide channel; the air inlet pipe penetrates through the shell and the pouring sealant, is communicated with the annular cavity and is provided with an air inlet piece; the amount of gas flowing in the diversion passage per unit time is less than the amount of gas flowing in the air inlet pipe per unit time.

6. The efficient heat dissipation potting-type transformer of claim 5, wherein: the air inlet piece comprises a mounting frame coaxially fixed on the air inlet pipe, the mounting frame is provided with cooling blades for guiding external air into the air inlet pipe, and the mounting frame is also coaxially fixed with a rotating shaft; the magnetic pole of one side that the drive shaft kept away from is the same, and the shell outside is located the top of drive shaft and is equipped with the second magnetic path with first magnetic path inter attraction, is located the below of drive shaft and is equipped with the third magnetic path with first magnetic path inter repulsion.

7. The efficient heat dissipating potting-like transformer of claim 6, wherein: the device also comprises a driving barrel fixed on the shell, wherein one end of the driving barrel facing the rotating shaft is opened, a piston is connected in the driving barrel in a transverse sliding manner, a spring is arranged between the piston and the driving barrel, and inert gas is injected into the driving barrel; the piston is also fixed with a connecting rod, and the first magnetic block and the second magnetic block are both fixed on the connecting rod.

8. The efficient heat dissipating potting-like transformer of claim 7, wherein: and a plurality of heat dissipation toothed plates are arranged at two ends of the shell.

9. The efficient heat dissipating potting-like transformer of claim 8, wherein: the housing is an aluminum housing of 6063T 5.