CN205376275U - Dry -type air -core reactor upper end magnetism shielding structure - Google Patents
Dry -type air -core reactor upper end magnetism shielding structure Download PDFInfo
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- CN205376275U CN205376275U CN201520995608.2U CN201520995608U CN205376275U CN 205376275 U CN205376275 U CN 205376275U CN 201520995608 U CN201520995608 U CN 201520995608U CN 205376275 U CN205376275 U CN 205376275U
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Abstract
The utility model discloses a dry -type air -core reactor upper end magnetism shielding structure is applied to the dry -type air -core reactor upper end, including setting up in insulation support and radial shield at air -core type reactor upper end center, the shield fix with insulation support on. The utility model discloses a shield adopts strip high permeability material, can satisfy the good magnetic screen effect of reactor and can satisfy the heat dissipation demand again, the structure of shield is less to inductance, the current distribution influence of reactor, does not influence the normal operating of reactor.
Description
Technical field
This utility model relates to the electromagnetic shielding field of power system, is specifically related to a kind of dry-type air-core reactor upper end magnet shielding structure.
Background technology
Dry-type air-core reactor is widely used in power system, and it has that the linearity is good, lightweight, mechanical strength is high, noise is low and the advantage such as easy to maintenance.But, owing to dry-type air-core reactor is hollow-core construction, general unshielded structure, causing that dry-type air-core reactor is in operation can produce bigger stray field about, and therefore, it is also one of major electromagnetic polluter in power system.When dry-type air-core reactor takes up an area limited space; if not taking shielding measure; the leakage field of dry-type air-core reactor can disturb the properly functioning of the equipment such as neighbouring instrument and meter, protection device; maybe can affect and be exposed under this magnetic field the health of human body of staff; it is also possible in the magnetic conductive metal bodies such as the fence around reactor, framework, grounding body and produces faradic current; causing added losses even damage equipment, the magnetic field that faradic current produces can affect again the properly functioning of reactor in turn.
Utility model content
The purpose of this utility model is in that for above-mentioned problems of the prior art, it is proposed to a kind of dry-type air-core reactor upper end magnet shielding structure, based on power frequency magnetic field shielding principle, it is achieved the stray field shield effectiveness of dry-type air-core reactor.
For reaching the purpose of above-mentioned utility model, this utility model is achieved through the following technical solutions:
A kind of dry-type air-core reactor upper end magnet shielding structure, is applied to dry-type air-core reactor upper end, includes the insulating support being arranged at air reactor upper end center and radial shield, described shield be fixed on on insulating support.
Further, described shield encloses with radiation mode at least one strip magnetic conductive rod and forms, and encloses end at magnetic conductive rod and fixes with insulating support.
Further, described shield parallel with the upper surface of dry-type air-core reactor or become an inclination angle.
Further, described shield is ferromagnetic rod.The cross section of magnetic conductive rod is rectangle.
Further, described shield is that at least two magnetic conductive rod forms with same inclination angle, adjacent stacks, is at rod and fixes with insulating support.
A kind of dry-type air-core reactor upper end of the present utility model magnet shielding structure, has the advantages that
1, the impact on some sensitive electron instruments, protection device of the leakage field vertically is effectively reduced above dry reactor.
2, shield adopts strip high permeability material, can meet the good Magnetic Shielding Effectiveness of reactor and can meet again radiating requirements.
3, the structure of shield is less on the inductance of reactor, CURRENT DISTRIBUTION impact, does not affect the properly functioning of reactor.
Accompanying drawing explanation
Fig. 1 is the ferromagnetic material shielding action schematic diagram to magnetic field.
Fig. 2 is the structural representation of dry-type air-core reactor upper end of the present utility model magnet shielding structure.
Fig. 3 is the sectional view of the partial section of dry-type air-core reactor upper end of the present utility model magnet shielding structure and magnetic conductive rod.
Detailed description of the invention
Below in conjunction with drawings and Examples, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole embodiment.
For the feature that dry-type air-core reactor power frequency stray field is big, according to different shielding requirements, shielding principle is tapped based on magnetic flux, ferromagnetic material is adopted to make shield, utilize the high permeance of ferromagnetic material, using beam of magnetic line of force is tied to Ferromagnetic Material, changes magnetic line of force direction, to reach effectiveness.
Referring to Fig. 1, for the ferromagnetic material shielding action schematic diagram to magnetic field.When utilizing magnetic flux shunting principle armoured magnetic field; shield effectiveness is limited mainly by the pcrmeability of shield material and the impact of shield physical dimension; such as thickness; this utility model is according to dry-type air-core reactor characteristics of magnetic field distribution; shielding requirements for dry-type air-core reactor difference occasion; and the feasibility that incorporation engineering is actual; to proposition upper end, dry-type air-core reactor magnetic field shielding construction, this structure can effectively reduce above reactor the impact on some sensitive electron instruments, protection device of the leakage field vertically.This magnet shielding structure is that certain position arranges shield above dry reactor, makes the magnetic line of force walk along shield, thus reaching the effect of shielding top leakage field, simultaneously taking account of and need to ensure that reactor has good radiating effect.
Fig. 2 and Fig. 3, for structural representation and the sectional view of dry-type air-core reactor upper end of the present utility model magnet shielding structure.A kind of dry-type air-core reactor upper end of the present utility model magnet shielding structure, it is applied to dry-type air-core reactor 20 upper end, include the insulating support 30 and radial shield 10 that are arranged at air reactor 20 upper end center, described shield 10 be fixed on on insulating support 30.
Further, as an embodiment, described shield 10 encloses with radiation mode at least one strip magnetic conductive rod 11 and forms.Radial shield 10 at center position, namely each magnetic conductive rod 11 enclose end, be fixed on insulating support 30.
Further, described shield 10 parallel with the upper surface of dry-type air-core reactor 20 or become an inclination angle.
Further, described shield 10 is ferromagnetic rod.The section A-A ` of magnetic conductive rod 10 is rectangle.In the present embodiment, the relative permeability μ of described ferromagnetic rodr=4200, conductivity gamma=1.05 × 10-7S/m, cross section 112 area of described shield 10 is 20mm × 10mm.
Further, described shield 10 forms with same inclination angle, adjacent stacks at least two magnetic conductive rod 11.The shield 10 of above-mentioned laminated is being fixed with insulating support 30 with rod.
It is mounted on dry-type air-core reactor top, from the chopper 21 near-end 150mm, far-end 250mm of dry-type air-core reactor by insulation insulating support 30.After dry-type air-core reactor is provided above shield.Simulation result shows, after dry-type air-core reactor upper end arranges shield, it is possible to guides magnetic flux above dry-type air-core reactor well, makes shield upper area field weakening.Meanwhile, the structure of shield is less on the inductance of reactor, CURRENT DISTRIBUTION impact, therefore can guarantee that the properly functioning of reactor.
Above-described embodiment is only in order to illustrate this utility model and and technical scheme described by unrestricted this utility model；Therefore, although this utility model is had been carried out detailed description with reference to each above-mentioned embodiment by this specification, but, it will be understood by those within the art that, still this utility model can be modified or equivalent replacement；And all are without departing from the technical scheme of spirit and scope of the present utility model and improvement thereof, it all should be encompassed in the middle of right of the present utility model.
Claims (6)
1. a dry-type air-core reactor upper end magnet shielding structure, is applied to dry-type air-core reactor upper end, it is characterised in that include the insulating support being arranged at air reactor upper end center and radial shield, described shield be fixed on on insulating support.
2. dry-type air-core reactor upper end according to claim 1 magnet shielding structure, it is characterised in that described shield encloses with radiation mode at least one strip magnetic conductive rod and forms, encloses end at magnetic conductive rod and fixes with insulating support.
3. dry-type air-core reactor upper end according to claim 1 and 2 magnet shielding structure, it is characterised in that described shield is parallel with the upper surface of dry-type air-core reactor or becomes an inclination angle.
4. dry-type air-core reactor upper end according to claim 1 and 2 magnet shielding structure, it is characterised in that described shield is ferromagnetic rod.
5. dry-type air-core reactor upper end according to claim 2 magnet shielding structure, it is characterised in that the cross section of described magnetic conductive rod is rectangle.
6. dry-type air-core reactor upper end according to claim 5 magnet shielding structure, it is characterised in that described shield is that at least two magnetic conductive rod forms with same inclination angle, adjacent stacks, is at rod and fixes with insulating support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995608.2U CN205376275U (en) | 2015-12-03 | 2015-12-03 | Dry -type air -core reactor upper end magnetism shielding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520995608.2U CN205376275U (en) | 2015-12-03 | 2015-12-03 | Dry -type air -core reactor upper end magnetism shielding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205376275U true CN205376275U (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520995608.2U Active CN205376275U (en) | 2015-12-03 | 2015-12-03 | Dry -type air -core reactor upper end magnetism shielding structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205376275U (en) |
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2015
- 2015-12-03 CN CN201520995608.2U patent/CN205376275U/en active Active
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