CN218886958U

CN218886958U - High-power low-loss quenching transformer

Info

Publication number: CN218886958U
Application number: CN202223464033.0U
Authority: CN
Inventors: 刘光辉; 郭朋超; 王明阳; 陶成林; 郭子义; 刘艺铭; 刘代哲
Original assignee: Luoyang Cono Industrial Equipment Co ltd
Current assignee: Luoyang Cono Industrial Equipment Co ltd
Priority date: 2022-12-25
Filing date: 2022-12-25
Publication date: 2023-04-18
Anticipated expiration: 2032-12-25

Abstract

The utility model discloses a high-power low-loss type quenching transformer, which comprises a housin, the iron core, primary coil subassembly and secondary coil subassembly, at first, through primary coil inlet tube and secondary coil inlet tube input recirculated cooling water, the cooling water passes through primary coil drain pipe and secondary coil drain pipe discharge, thereby for primary coil, the secondary coil cooling, then, supply power through the input copper bar, because the electromagnetic induction effect between primary coil and the secondary coil, make to produce induced electromotive force on the secondary coil, when output voltage is adjusted to needs, change secondary coil's length through the quantity that changes the turn ratio connecting plate lap-joint turn ratio lead-connection post, thereby change primary coil and secondary coil's turn ratio, finally change secondary coil output voltage's size, and export from the output copper bar. The utility model has simple structure, low energy loss, convenient turn ratio adjustment and high quenching efficiency.

Description

High-power low-loss quenching transformer

Technical Field

The utility model relates to the technical field of induction heating equipment, in particular to a high-power low-loss quenching transformer.

Background

Quenching is a key link in the manufacturing process of metal parts, because most of the metal parts are made of nodular cast iron in the initial manufacturing stage, the nodular cast iron is usually in a lamellar pearlite structure before hardening treatment, the structure is a mixture of ferrite and cementite obtained by manufacturing the cast iron at a low cooling rate, and the hardness, the wear resistance, the mechanical strength and other properties of the mixture cannot meet the actual use requirements. Therefore, the surface of the part needs to be quenched by induction heating, so that the austenite structure is converted into a hard martensite structure, and the properties of the part, such as rigidity, hardness, wear resistance, fatigue strength and the like, are greatly improved. The quenching transformer is used for quenching the parts, and has the main functions of voltage reduction, isolation and impedance matching, so that the power supply voltage is reduced to be matched with a load, an alternating magnetic field is generated in the inductor, and induced current heating is generated on the outer surface of the workpiece, so that the surface hardness and the quenching layer depth of the workpiece meet the corresponding technical requirements. However, when the existing quenching transformer is heated with high power, the energy loss is large, so that the quenching efficiency is low, and therefore, the development of a high-power low-loss quenching transformer is necessary.

Patent publications and literature data at the present stage show: 1) The base of the Chinese patent (publication No. CN 21192929212U) consists of a fixing hole, a fixing frame, a heat dissipation screen and a heat dissipation fan, when the high-efficiency high-frequency quenching transformer is used, a switch of the heat dissipation fan in the base can be opened, the heat dissipation fan blows air, then the air flow can blow on the induction coil main body through the heat dissipation screen, and the surface of the induction coil main body can be cooled, so that the phenomenon that the working temperature of the high-efficiency high-frequency quenching transformer is too high is avoided, but when the quenching transformer is used for quenching and heating, a large amount of energy loss can still be generated, and the quenching efficiency is not improved; 2) The shape of the adjusting rod of the Chinese patent (publication No. CN 106384645A) is matched with that of the top cover, the output efficiency of the quenching transformer is changed by adjusting the turn ratio connecting plate, so that the quenching transformer is suitable for induction heating of parts of different varieties, but the turn ratio connecting plate is of a crank structure, a fastening nut needs to be completely taken down when the turn ratio is switched, then the adjusting rod is sleeved on the fastening nut and then the fastening nut is used for fixing, and the quenching transformer is complex in operation and long in consumed time.

In summary, although the existing quenching transformer realizes high-power induction heating to a certain extent, the existing quenching transformer still has a plurality of defects, so that a high-power low-loss quenching transformer is developed.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the existing defects, and provide a high-power low-loss quenching transformer which has simple structure, low loss and convenient turn ratio switching; the iron core is formed by stacking metal sheets made of ferrite materials, and compared with common electrical steel sheets, the iron loss is low; the thickness of the first insulating layer between the iron core and the primary coil is limited to 1.5 to 2 millimeters, so that magnetic flux leakage can be effectively reduced, and energy loss is further reduced; the large transition fillets are arranged at the turning positions of the input copper bar and the output copper bar, so that the high-frequency and high-power current bearing capacity of the quenching transformer can be improved, and the energy loss at the sharp corners of the structure is reduced; the turn ratio connecting plate is of a hasp structure, and is convenient to be lapped with the turn ratio guide connecting column, so that the turn ratio is convenient to switch, adaptive output power is provided for different products, and the problem in the background art can be effectively solved.

In order to achieve the above object, the utility model provides a following technical scheme: a high-power low-loss quenching transformer comprises a shell and an iron core, wherein the iron core is positioned in the shell, an insulating layer is filled between the iron core and the shell, and a first insulating layer, a primary coil assembly, a second insulating layer and a secondary coil assembly are sequentially arranged in the center of the iron core from inside to outside;

the primary coil assembly comprises a primary coil, a primary coil water inlet pipe and a primary coil water outlet pipe; the secondary coil assembly comprises a plurality of groups of secondary coils connected end to end, each group of secondary coils is provided with a secondary coil water inlet pipe and a secondary coil water outlet pipe, and the two corresponding secondary coils at the ends are connected through turn ratio lead posts, turn ratio connecting plates and nuts; the primary coil is connected with an input copper bar, and the secondary coil is connected with an output copper bar.

Preferably, the head ends and the tail ends of the two secondary coils corresponding to the head and the tail are respectively fixed with a turn ratio lead connection column, one end of the turn ratio connection plate is sleeved with one turn ratio lead connection column, the other end of the turn ratio connection plate is in a semi-annular shape and is movably clamped with the other turn ratio lead connection column, the two turn ratio lead connection columns are in threaded connection with nuts for compressing the turn ratio connection plate, and the nuts are made of epoxy resin.

Preferably, the primary coil and the secondary coil are both hollow structures with two closed ends, and the primary coil and the secondary coil are both made of red copper; the primary coil water inlet pipe and the primary coil water outlet pipe are communicated with the primary coil and are filled with circulating cooling water; the secondary coil water inlet pipe and the secondary coil water outlet pipe are communicated with the secondary coil and are filled with circulating cooling water.

Preferably, the iron core is in a shape of Chinese character ri and is formed by stacking metal sheets made of ferrite, and the primary coil is wound on the upright post in the middle of the iron core.

Preferably, the thickness of the first insulating layer between the primary coil and the iron core is 1.5 to 2 millimeters, and the first insulating layer is made of green shell paper which is fully adhered with an insulating tape and then is wholly soaked in insulating paint.

Preferably, transition fillets with the thickness being 3 to 5 times that of the copper bars are arranged at the turning positions of the input copper bars and the output copper bars.

Compared with the prior art, the beneficial effects of the utility model are that: the structure is simple, the loss is low, and the turn ratio switching is convenient; the iron core is formed by stacking metal sheets made of ferrite materials, and compared with common electrical steel sheets, the iron loss is low; the thickness of the first insulating layer between the iron core and the primary coil is limited to 1.5 to 2 millimeters, so that magnetic flux leakage can be effectively reduced, and energy loss is further reduced; the large transition fillets are arranged at the turning positions of the input copper bar and the output copper bar, so that the high-frequency and high-power current bearing capacity of the quenching transformer can be improved, and the energy loss at the sharp corners of the structure is reduced; the secondary coil assembly is connected end to end by adopting a plurality of groups of secondary coils, the two secondary coils corresponding to the end to end are connected through the turn ratio lead post, the turn ratio connecting plate and the nut, and the turn ratio connecting plate is conveniently lapped with the turn ratio lead post, so that the turn ratio is conveniently switched, and adaptive output power is provided for different types of products.

Drawings

FIG. 1 is a schematic view of the internal structure of the present invention;

FIG. 2 is a front full sectional view of the present invention;

fig. 3 is a schematic view of the primary coil of the present invention;

FIG. 4 is a schematic structural view of the present invention;

fig. 5 is a top view of the internal structure of the present invention;

fig. 6 is a schematic structural view of the primary coil of the present invention;

fig. 7 is a schematic structural diagram of the secondary coil assembly of the present invention.

In the figure: the transformer comprises a shell 1, an iron core 2, a first insulating layer 3, a primary coil 4, a primary coil water inlet pipe 5, a primary coil water outlet pipe 6, an input copper bar 7, a second insulating layer 8, a secondary coil 9, a secondary coil water inlet pipe 10, a secondary coil water outlet pipe 11, a turn ratio lead connecting column 12, a turn ratio connecting plate 13, a nut 14 and an output copper bar 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a high-power low-loss quenching transformer comprises a shell 1 and an iron core 2, wherein the iron core 2 is positioned in the shell 1, an insulating layer is filled between the iron core 2 and the shell 1, and a first insulating layer 3, a primary coil assembly, a second insulating layer 8 and a secondary coil assembly are sequentially arranged in the center of the iron core 2 from inside to outside;

specifically, the primary coil assembly comprises a primary coil 4, a primary coil water inlet pipe 5 and a primary coil water outlet pipe 6; the secondary coil assembly comprises a plurality of groups of secondary coils 9 connected end to end, each group of secondary coils 9 is provided with a secondary coil water inlet pipe 10 and a secondary coil water outlet pipe 11, and the two secondary coils 9 corresponding to the end to end are connected through a turn ratio lead connecting column 12, a turn ratio connecting plate 13 and a nut 14; the primary coil 4 is connected with an input copper bar 7;

it can be understood that the secondary coil assembly is connected with the output copper bar 15, the primary coil assembly is connected with the input copper bar 7, the secondary coil assembly comprises a plurality of groups of secondary coils 9 connected end to end, the two secondary coils 9 corresponding to end are connected through the turn ratio lead post 12, the turn ratio connecting plate 13 and the nut 14, the turn ratio can be switched according to different products, the appropriate output power is selected, the operation is convenient and rapid, and the application range is wide;

furthermore, the head ends and the tail ends of the two secondary coils 9 corresponding to the head end and the tail end are both fixed with turn ratio lead-in posts 12, one end of a turn ratio connecting plate 13 is sleeved with one turn ratio lead-in post 12, the other end of the turn ratio connecting plate 13 is semi-annular and is movably clamped with the other turn ratio lead-in post 12, the two turn ratio lead-in posts 12 are both in threaded connection with nuts 14 for pressing the turn ratio connecting plate 13, the nuts 14 are made of epoxy resin, namely one end of the turn ratio connecting plate 13 is movably sleeved on one turn ratio lead-in post 12, and the other end of the turn ratio connecting plate 13 is lapped on the other turn ratio lead-in post 12, so that the head-to-tail connection of the two secondary coils 9 is realized, the turn ratio is changed, and a movable lapping mode is adopted, so that the turn ratio can be switched rapidly and the operation efficiency is improved;

further, the primary coil 4 and the secondary coil 9 are both hollow structures with two closed ends, and the primary coil 4 and the secondary coil 9 are both made of red copper; the primary coil water inlet pipe 5 and the primary coil water outlet pipe 6 are communicated with the primary coil 4 and are filled with circulating cooling water, and the circulating cooling water enters from the primary coil water inlet pipe 5 and is discharged from the primary coil water outlet pipe 6 and is used for cooling the primary coil 4; the secondary coil water inlet pipe 10 and the secondary coil water outlet pipe 11 are communicated with the secondary coil 9 and are filled with circulating cooling water, and the circulating cooling water cools the secondary coil 9 in the same way;

it should be noted that when one or more sets of secondary coils 9 are adopted, the external circulating cooling water pipelines need to be correspondingly communicated with the secondary coil water inlet pipe 10 and the secondary coil water outlet pipe 11, and all the secondary coils 9 need to be cooled;

furthermore, the iron core 2 is in a shape of Chinese character ri and is formed by stacking metal sheets made of ferrite, the primary coil 4 is wound on the upright column in the middle of the iron core 2, and the iron core 2 is formed by stacking metal sheets made of ferrite, so that the iron loss is low compared with that of a common electrical steel sheet;

furthermore, the thickness of the first insulating layer 3 between the primary coil 4 and the iron core 2 is 1.5 to 2 millimeters, and the first insulating layer 3 is obtained by integrally soaking insulating paint into green shell paper which is fully stuck with an insulating tape, so that the magnetic flux leakage can be effectively reduced, and the energy loss is further reduced;

in addition, transition fillets with the thickness of 3 to 5 times that of the copper bar are formed in the turning positions of the input copper bar 7 and the output copper bar 15, so that the high-frequency and high-power current carrying capacity of the quenching transformer can be improved, and the energy loss at the sharp corners of the structure is reduced.

The working principle is as follows: when the secondary coil cooling device is used, circulating cooling water is input through the primary coil water inlet pipe 5 and the secondary coil water inlet pipe 10, the cooling water is discharged through the primary coil water outlet pipe 6 and the secondary coil water outlet pipe 11, the primary coil 4 and the secondary coil 9 are cooled, power is supplied through the input copper bar 7, then induced electromotive force is generated on the secondary coil 9 through the electromagnetic induction effect between the primary coil 4 and the secondary coil 9, when output voltage needs to be adjusted, the length of the secondary coil 9 is changed by changing the number of the turn ratio connecting plates 13 lapping the turn ratio conducting posts 12, the turn ratio of the primary coil 4 and the secondary coil 9 is changed, and finally the magnitude of the output voltage of the secondary coil 9 is changed and the output voltage is output from the output copper bar 15.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a high-power low-loss type quenching transformer, includes casing (1) and iron core (2), its characterized in that: the iron core (2) is positioned inside the shell (1), an insulating layer is filled between the iron core (2) and the shell (1), and a first insulating layer (3), a primary coil assembly, a second insulating layer (8) and a secondary coil assembly are sequentially arranged in the center of the iron core (2) from inside to outside;

the primary coil assembly comprises a primary coil (4), a primary coil water inlet pipe (5) and a primary coil water outlet pipe (6); the secondary coil assembly comprises a plurality of groups of secondary coils (9) connected end to end, each group of secondary coils (9) is provided with a secondary coil water inlet pipe (10) and a secondary coil water outlet pipe (11), and the two secondary coils (9) corresponding to the end to end are connected through a turn ratio lead connecting column (12), a turn ratio connecting plate (13) and a nut (14); the primary coil (4) is connected with an input copper bar (7), and the secondary coil (9) is connected with an output copper bar (15).

2. The high-power low-loss quenching transformer as claimed in claim 1, wherein: the head ends and the tail ends of the two secondary coils (9) corresponding to the head end and the tail end are respectively fixed with a turn ratio lead connecting column (12), one end of a turn ratio connecting plate (13) is sleeved with one turn ratio lead connecting column (12), the other end of the turn ratio connecting plate (13) is in a semi-ring shape and movably clamped with the other turn ratio lead connecting column (12), the two turn ratio lead connecting columns (12) are respectively in threaded connection with a nut (14) for compressing the turn ratio connecting plate (13), and the nut (14) is made of epoxy resin.

3. The high-power low-loss quenching transformer as claimed in claim 1, characterized in that: the primary coil (4) and the secondary coil (9) are both hollow structures with two closed ends, and the primary coil (4) and the secondary coil (9) are both made of red copper; the primary coil water inlet pipe (5) and the primary coil water outlet pipe (6) are communicated with the primary coil (4) and are filled with circulating cooling water; and the secondary coil water inlet pipe (10) and the secondary coil water outlet pipe (11) are communicated with the secondary coil (9) and are filled with circulating cooling water.

4. The high-power low-loss quenching transformer as claimed in claim 1, wherein: the iron core (2) is in a shape of Chinese character ri and is formed by stacking metal sheets made of ferrite materials, and the primary coil (4) is wound on the stand column in the middle of the iron core (2).

5. The high-power low-loss quenching transformer as claimed in claim 1, wherein: the thickness of the first insulating layer (3) between the primary coil (4) and the iron core (2) is 1.5-2 mm, and the first insulating layer (3) is made of green shell paper which is fully stuck with an insulating tape and then is wholly soaked with insulating paint.

6. The high-power low-loss quenching transformer as claimed in claim 1, wherein: transition fillets of 3 to 5 times of the thickness of the copper bar are formed in the turning positions of the input copper bar (7) and the output copper bar (15).