CN214476873U

CN214476873U - Low-noise reactor

Info

Publication number: CN214476873U
Application number: CN202120419617.2U
Authority: CN
Inventors: 李华春
Original assignee: Shanghai Boliang Electric Appliance Manufacturing Co ltd
Current assignee: Shanghai Boliang Electric Appliance Manufacturing Co ltd
Priority date: 2021-02-25
Filing date: 2021-02-25
Publication date: 2021-10-22
Anticipated expiration: 2031-02-25

Abstract

The application relates to the field of circuit components and parts, especially, relate to a low noise reactor, its first iron core and second iron core by supreme relative connection of including down, its characterized in that: the prefabricated coil comprises a wire connector, coils and insulating layers, wherein the coils are tightly surrounded and distributed along the length direction of the core column, the insulating layers wrap the outer walls of the coils, the wire connector penetrates through the insulating layers and is connected with the two ends of the coils, and insulating glue is bonded between the coils and the insulating layers for fastening; and epoxy resin is filled between the prefabricated coil and the first iron core and between the prefabricated coil and the second iron core. The reactor has the effects of simple coil assembly and low noise.

Description

Low-noise reactor

Technical Field

The application relates to the field of circuit components, in particular to a low-noise reactor.

Background

Reactors, also called inductors, are electrical conductors that, when energized, generate a magnetic field in a certain spatial area occupied by a conductor, so that all electrical conductors capable of carrying current are inductive in the general sense. However, the inductance of the electrified long straight conductor is small, and the generated magnetic field is not strong, so that the actual reactor is in a mode that a conducting wire is wound into a solenoid, and is called as an air-core reactor; in order to make this solenoid have a larger inductance, a core, called a core reactor, is sometimes inserted into the solenoid.

At present, the utility model discloses an authorized bulletin number is as CN204946656U discloses a three-phase reactor, including magnetic core body and coil, the magnetic core body is the setting of day font structure including three stem and two choking posts, all around being equipped with on the three stem coil, characterized by: the three core columns respectively comprise a winding part for winding a coil, the winding part is provided with at least one limiting clamping groove, and the coil is wound on the limiting clamping groove.

In view of the above-mentioned related technologies, the inventor believes that when a reactor with three core columns and two choke columns in a zigzag structure is assembled, a coil needs to pass through a gap between the core columns every time the coil is wound, which is not favorable for automatic production and has the defect that the coil is troublesome to assemble.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the assembly of the reactor coil, the application provides a low-noise reactor.

The application provides a low noise reactor adopts following technical scheme:

the utility model provides a low noise reactor, by supreme first iron core and the second iron core including the relative connection down, its characterized in that: still include prefabricated coil, first iron core and second iron core all include the pellet and connect in the at least stem of two on pellet surface, the one end that the pellet was kept away from to the stem is connecting portion, the connecting portion of first iron core with the laminating of the connecting portion one-to-one of second iron core, prefabricated coil snare is located the stem, it has epoxy to fill between prefabricated coil and first iron core, the second iron core.

Through adopting above-mentioned technical scheme, during the assembly, the stem of first iron core up, locate the surface of first iron core stem with the direct cover of prefabricated coil, pour into predetermined epoxy and fill, epoxy does not cross the up end of stem, make the connecting portion of second iron core stem and the laminating of the connecting portion one-to-one of first iron core stem, epoxy solidifies the back shaping between first iron core, second iron core and the prefabricated coil, this reactor is stable in structure not only, and the coil does not need round ground to wind and establishes, the assembly of coil has been made things convenient for.

Preferably, prefabricated coil includes the connector lug, closely encircles and follows the coil that stem length direction distributes and the parcel the insulating layer of coil outer wall, the connector lug wears to locate the insulating layer with the both ends of coil are connected, the coil with bond between the insulating layer and have the insulating cement to fasten.

Through adopting above-mentioned technical scheme, prefabricated coil is through prefabricating, can directly overlap when the reactor assembly and locate the stem and assemble. The prefabricated coil can be put into mass production, and when the reactor is assembled, the prefabricated coil is directly sleeved on the core column, so that automatic assembly is facilitated, and the assembly efficiency of the reactor is improved.

Preferably, the connecting portions of the first iron core and the second iron core are respectively provided with a protrusion and a groove clamped with the protrusion.

Through adopting above-mentioned technical scheme, connecting portion dock better and be difficult to produce the deviation when arch and recess are favorable to the installation, also can increase the area of contact between first iron core and the second iron core simultaneously, increase the air gap between first iron core and the second iron core to increase the maximum magnetic saturation of iron core, make the magnetic conduction effect of iron core better.

Preferably, an insulation sheet is connected between the pre-formed coil and the core block.

By adopting the technical scheme, the insulating sheet is arranged between the prefabricated coil and the core block, a magnetic field can be generated around the wound coil after the coil is electrified, the insulating sheet is not magnetic and non-conductive, and the eddy current loss of the core block part can be reduced.

Preferably, the first iron core and the second iron core are both composed of a plurality of laminated iron core sheets.

By adopting the technical scheme, an air gap exists between the laminated iron core pieces, the maximum magnetic saturation of the iron core is improved by the air gap, so that the iron core with smaller volume can be wound with more coils, and the reduction of the volume of the iron core of the reactor is facilitated.

Preferably, the lower part of first iron core is provided with the mounting hole that runs through first iron core, the lower part of first iron core is connected with first yoke along the both sides of the range upon range of direction of iron core piece, first yoke includes the first fixed part of closely laminating with the iron core piece and follows the supporting part that first fixed part extends to keeping away from the iron core piece direction, first fixed part is provided with the intercommunication the through-hole of mounting hole, in the through-hole with wear to be equipped with the pull rod bolt in the mounting hole, be connected with the insulating ring between pull rod bolt and first iron core, the first yoke.

By adopting the technical scheme, the first iron core is supported by the supporting part of the first yoke iron, so that a certain distance is kept between the first iron core and the contact surface of the installation when the first iron core is used; the first fixing portion of the first yoke and the tie bolts enable the laminated core pieces to be always kept in a fastened state, and stability of the first core piece is enhanced. The insulating ring can make the cavity produce between stay bolt and the iron core, keeps apart stay bolt and iron core, improves the security.

Preferably, the upper portion of second iron core is provided with the mounting hole that runs through the second iron core, the upper portion of second iron core is connected with the second yoke, the second yoke includes the second fixed part of closely laminating with second iron core side and the cover portion at parcel second iron core top, the second fixed part is provided with the intercommunication the through-hole of mounting hole, in the through-hole with wear to be equipped with the pull rod bolt in the mounting hole, be connected with the insulating ring between pull rod bolt and second iron core, the second yoke.

Through adopting above-mentioned technical scheme, second yoke and stay bolt make range upon range of iron core piece remain the state of fastening all the time, have strengthened the steadiness of second iron core piece, have further improved the mechanical strength of reactor. The insulating ring can enable a cavity to be formed between the pull rod bolt and the iron core, so that the pull rod bolt is isolated from the core block, and the safety is improved.

The first yoke iron and the second yoke iron enable an air gap between iron chips to be difficult to change in the operation process of the reactor, a magnetic field generated after the coil is electrified is difficult to change, and electromagnetic noise generated in the operation process of the reactor can be reduced.

Preferably, a junction box is arranged at the top of the second yoke, an accommodating cavity is formed in the junction box, an interface is arranged on the side portion of the junction box, the junction box is arranged in a penetrating mode and is connected with the accommodating cavity in a rotating mode, a guide piece is hinged to the inner wall of the junction box, the connecting end of the guide piece and the connecting end of the junction box is opposite to the bottom of the junction box and is lower than the interface, an insulating spring is connected to the bottom of the guide piece, one end, far away from the guide piece, of the insulating spring is fixed to the bottom of the accommodating cavity, and the guide piece can be turned over to be in contact with the junction box.

Through adopting above-mentioned technical scheme, during the use, power connection end inserts in the terminal box from the interface, and the wiring end pushes down the guide piece, and the other end of guide piece is electrically conductive with the connector lug contact of coil, and the guide piece makes the connector lug produce decurrent effort, and the torsional spring produces a reaction force to the connector lug, makes power connection end remain an ascending resultant force all the time to support power connection end tightly at the roof of terminal box, can not popped out by the guide piece.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the reactor is assembled, the prefabricated coil is directly sleeved on the outer surface of the core column of the first iron core, after epoxy resin is poured, the connecting part of the core column of the second iron core is correspondingly attached to the connecting part of the core column of the first iron core one by one, and the epoxy resin is solidified among the first iron core, the second iron core and the prefabricated coil and then is molded, so that the trouble of winding the coil on the core column is avoided;

2. the epoxy resin can enable the structure of the reactor to be more stable, and the reactor is not easy to generate noise during operation;

3. the first yoke iron and the second yoke iron enable an air gap between the iron chips to be not easy to change in the operation process of the reactor, and electromagnetic noise is reduced.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present application.

Fig. 2 is a cross-sectional view of embodiment 1 of the present application.

FIG. 3 is an exploded view of a part of the structure of application example 1.

Fig. 4 is a schematic structural diagram of embodiment 2 of the present application.

Fig. 5 is a partial sectional view of embodiment 2 of the present application.

Fig. 6 is an enlarged view of a in fig. 5.

Description of reference numerals: 1. a first yoke iron; 100. a first fixed part; 101. a support portion; 2. a first iron core; 3. a second iron core; 4. prefabricating a coil; 41. a coil layer; 42. an insulating layer; 43. a connector lug; 5. an epoxy resin; 6. an insulating sheet; 7. an insulating ring; 8. an iron core sheet; 81. mounting holes; 9. a core block; 10. a stem; 11. a connecting portion; 111. a protrusion; 112. a groove; 13. a draw bar bolt; 14. a junction box; 141. an accommodating chamber; 142. an interface; 15. an insulating spring; 16. a guide piece; 17. a second yoke iron; 171. a second fixed part; 172. a covering section; 18. a torsion spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

Example 1

The embodiment of the application discloses a low noise reactor.

Referring to fig. 1, the low-noise reactor comprises a first iron core 2, a second iron core 3 connected to the top of the first iron core 2, a prefabricated coil 4 sleeved between the first iron core 2 and the second iron core 3, and an insulating sheet 6 from bottom to top.

Referring to fig. 2 and 3, each of the first core 2 and the second core 3 includes a core block 9 and a core column 10 integrally formed with the core block 9, and the core columns 10 include at least two, and three are exemplified in the present embodiment. One end of the core column 10, which is far away from the core block 9, is a connecting part 11, the connecting part 11 of the first iron core 2 is provided with a groove 112, and the connecting part 11 of the second iron core 3 is provided with a protrusion 111 matched with the groove 112 of the first iron core 2; the connection portion 11 of the first core 2 may also be provided with a protrusion 111, and the connection portion 11 of the second core 3 is provided with a groove 112 matching the protrusion 111 of the first core 2. The protrusion 111 and the groove 112 allow the connection portion 11 of the first core 2 and the second core 3 to be precisely butted at the time of assembly.

Referring to fig. 2 and 3, the preformed coil 4 includes a tightly surrounded coil 41, an insulating layer 42 wrapping the outer wall of the coil 41, and a connector lug 43 penetrating through the insulating layer 42 and connected to two ends of the coil 41, the coil 41 is tightly wound by using an enameled copper wire, and an insulating glue is bonded between the coil 41 and the insulating layer 42 for fastening. The three groups of prefabricated coils 4 are respectively sleeved on the three groups of core columns 10, gaps are reserved between the prefabricated coils 4 and the two iron cores, and epoxy resin 5 is filled between the gaps.

Referring to fig. 1 to 3, each of the first core 2 and the second core 3 is composed of a plurality of laminated iron core sheets 8, and the iron core sheets 8 may be silicon steel sheets. The lower portion of the first core 2 and the upper portion of the second core 3 are provided with mounting holes 81 penetrating the core blocks 9, respectively. The lower part of the first core 2 is provided with a first yoke 1 for fastening the first core 2, and the upper part of the second core 3 is provided with a second yoke 17 for fastening the second core 3. The first yoke 1 and the second yoke 17 are made of non-magnetic material, such as aluminum alloy. The first yoke 1 includes a first fixing portion 100 connected to the core segment 8 and a support portion 101 extending in a direction away from the lamination direction of the core segment 8 along the first fixing portion 100, the first fixing portion 100 is provided with a through hole communicating with the mounting hole 81, and a tie bolt 13 is inserted into the through hole and the mounting hole 81. An insulating ring 7 is connected between the pull rod bolt 13 and the first iron core 2 and the first yoke 1. The second yoke 17 includes a second fixing portion 171 connected to the side of the core plate 8 and a covering portion 172 covering the top of the second core 3, the second fixing portion 171 is provided with a through hole communicating with the mounting hole 81, and a tie bolt 13 is inserted into the through hole and the mounting hole 81. An insulating ring 7 is connected between the tie bolt 13 and the second iron core 3 and the second yoke 17. The insulating ring 7 isolates the pull rod bolt 13 from the iron core, so that the safety of the reactor is improved.

The implementation principle of a low noise reactor of the embodiment of the application is as follows: refer to fig. 3, during the assembly, stem 10 of first iron core 2 is up, with three insulating pieces of group 6, the surface of stem 10 is located to three prefabricated coil 4 of group and the insulating piece 6 of three other groups cover in proper order, pour into preset epoxy 5 and fill, epoxy 5 glues the up end that has not crossed stem 10, the stem 10 of second iron core 3 is down, make connecting portion 11 of stem 10 of second iron core 3 and the 11 butt joints of connecting portion of stem 10 of first iron core 2, epoxy 5 glues and receives the effect of second iron core 3 pressure, with first iron core 2, gap between the second iron core 3 is filled up, after epoxy 5 glues the solidification, first iron core 2, second iron core 3 and prefabricated coil 4 solidification shaping, the coil does not need one to be around establishing, it is more simple and convenient to assemble.

Example 2

The difference between the examples of the present application and example 1 is that: referring to fig. 4-6, the top of the second core 3 is provided with 3 groups of junction boxes 14, the junction boxes 14 are made of insulating materials, the three groups of junction boxes 14 are provided with two accommodating cavities 141, and the side of each group of junction boxes 14 is provided with two interfaces 142. The inner wall of the junction box 14 is hinged with a guide piece 16, the guide piece 16 is made of conductive materials, an insulating spring 15 is fixed at the bottom of the accommodating cavity 141, and the other end of the insulating spring 15 is fixed with the guide piece 16. The end of the guide tab 16 connected to the terminal block 14 is lower than the interface 142, and the insulating spring 15 causes the end of the guide tab 16 remote from the hinge to spring up.

The torsion spring 18 is fixed on the inner side wall of the interface 142 of each group of junction boxes 14, and the connector lugs 43 are respectively arranged on the junction boxes 14 and fixedly connected with the other ends of the torsion springs 18. The guide piece 16 can be turned over to contact the terminal block 43.

The implementation principle of a low noise reactor of the embodiment of the application is as follows: in use, the terminal of the power supply is inserted into the terminal box 14 from the interface 142, the terminal presses the guiding piece 16 downwards, and the other end of the guiding piece 16 is contacted with the connector lug 43 of the coil for conducting electricity.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a low noise reactor, by lower supreme first iron core (2) and the second iron core (3) including relative connection, its characterized in that: still include prefabricated coil (4), first iron core (2) and second iron core (3) all include pellet (9) and connect in pellet (9) surface two at least stem (10), the one end that pellet (9) were kept away from in stem (10) is connecting portion (11), the connecting portion of first iron core (2) with connecting portion (11) one-to-one laminating of second iron core (3), prefabricated coil (4) cover is located stem (10), it has epoxy (5) to fill between prefabricated coil (4) and first iron core (2), second iron core (3).

2. The low-noise reactor according to claim 1, characterized in that: prefabricated coil (4) include connector lug (43), closely encircle and along coil (41) and the parcel that stem length direction distributes coil (41) outer wall, connector lug (43) wear to locate insulating layer (42) with the both ends of coil (41) are connected, coil (41) with it fastens to bond to have the insulating cement between insulating layer (42).

3. The low-noise reactor according to claim 1, characterized in that: the connecting portion (11) of the first iron core (2) and the connecting portion (11) of the second iron core (3) are respectively provided with a protrusion (111) and a groove (112) clamped with the protrusion (111).

4. The low-noise reactor according to claim 2, characterized in that: an insulating sheet (6) is connected between the prefabricated coil (4) and the core block (9).

5. The low-noise reactor according to claim 2, characterized in that: the first iron core (2) and the second iron core (3) are composed of a plurality of laminated iron core pieces (8).

6. The low-noise reactor according to claim 5, characterized in that: the lower part of first iron core (2) is provided with mounting hole (81) that runs through first iron core (2), the lower part of first iron core (2) is connected with first yoke (1) along the both sides of the range upon range of direction of iron core piece (8), first yoke (1) include with iron core piece (8) first fixed part (100) of closely laminating with along first fixed part (100) to keeping away from supporting part (101) that iron core piece (8) direction extended, first fixed part (100) are provided with the intercommunication the through-hole of mounting hole (81), in the through-hole with wear to be equipped with pull rod bolt (13) in mounting hole (81), be connected with between pull rod bolt (13) and first iron core (2), first yoke (1) insulating ring (7).

7. The low-noise reactor according to claim 6, characterized in that: the upper portion of second iron core (3) also is provided with mounting hole (81) that runs through second iron core (3), the upper portion of second iron core (3) is connected with second yoke (17), second yoke (17) include with second iron core (3) side second fixed part (171) of closely laminating and cover portion (172) at parcel second iron core (3) top, second fixed part (171) are provided with the intercommunication the through-hole of mounting hole (81), in the through-hole with wear to be equipped with pull rod bolt (13) in mounting hole (81), be connected with between pull rod bolt (13) and second iron core (3), second yoke (17) insulating ring (7).

8. The low-noise reactor according to claim 7, characterized in that: the top of the second yoke (17) is provided with a junction box (14), the junction box (14) is provided with an accommodating cavity (141), the side of the junction box (14) is provided with an interface (142), a connector lug (43) penetrates through the junction box (14) and is rotatably connected with the accommodating cavity (141), the inner wall of the junction box (14) is hinged with a guide piece (16), the connecting end of the guide piece (16) and the junction box (14) is lower than the interface (142), the bottom of the guide piece (16) is connected with an insulating spring (15), one end, far away from the guide piece (16), of the insulating spring (15) is fixed to the bottom of the accommodating cavity (141), and the guide piece (16) can be turned over to be in contact with the connector lug (43).