CN112735779B - Novel iron core reactor considering force compensation - Google Patents
Novel iron core reactor considering force compensation Download PDFInfo
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- CN112735779B CN112735779B CN202011596761.XA CN202011596761A CN112735779B CN 112735779 B CN112735779 B CN 112735779B CN 202011596761 A CN202011596761 A CN 202011596761A CN 112735779 B CN112735779 B CN 112735779B
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- iron core
- iron
- core column
- yoke
- force compensation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
Abstract
The invention is suitable for the advanced manufacturing field of power transmission and transformation equipment, in particular to a novel iron core reactor considering force compensation, which comprises two layers of iron core column groups which are symmetrically distributed; the iron core column group consists of a plurality of iron core columns, wherein each iron core column consists of a plurality of iron core cakes, a winding coil is sleeved outside each iron core column, and an air gap insulation cavity is formed between each winding coil and each iron core column; the width of the air gap insulation cavity is gradually reduced from one end close to the symmetrical plane of the iron core column group to the other end, and when the input current phase difference of the two layers of winding coils is controlled, the stress of the two layers of structures is opposite, so that the integral stress offset of the iron core reactor is realized; the design of a double-layer active vibration and noise reduction structure is completed, and vibration and noise reduction and service life improvement of equipment are realized; the convenience of engineering manufacture and application is improved; is suitable for practical industrial application.
Description
Technical Field
The invention relates to the field of advanced manufacturing of power transmission and transformation equipment, in particular to a novel iron core reactor considering force compensation.
Background
A reactor, also called an inductor, plays an important role in a power system, and is a power device that has been widely used. The series reactor can limit short-circuit current and fault current in the line, and the parallel reactor can compensate line capacitive reactance, and is applied to reactive power compensation of a power system in each voltage class power grid to improve reactive power operation condition of the power system. Therefore, the reactor is an important power device in the power system, however, in actual operation, the iron core and the winding thereof are subjected to the combined action of magnetostrictive tension, maxwell stress and lorentz force, and obvious vibration and noise are generated. In some cases, these noises have been a main source of environmental noise pollution, and have adverse effects on the life of the equipment and physical and psychological health of human body. Designing and developing a novel iron core reactor with strong safety, high performance, low noise and low vibration has become a leading-edge hot point problem in the field of electrical equipment manufacturing.
Chinese patent CN211150239U proposes a low noise iron core reactor, in which the iron core column, iron cake, gap and coil are integrally cast in vacuum, and there is an air passage between the coil and iron core for heat dissipation, so as to greatly reduce the noise of the product, and the vibration force is small and the operation effect is stable.
Chinese patent CN210349549U discloses a novel structure of iron core reactor, pours into an organic whole with the iron-cored post, insulating cylinder to ground, insulating cylinder, air flue and coil, and the iron-cored post is located the center, is equipped with the air flue on the insulating cylinder, and the insulating cylinder sets up to ground the iron-cored post outside, the insulating cylinder sets up the outside to ground insulating cylinder, the coil is around outside the insulating cylinder, through this kind of integral type structure, has equally alleviated noise and vibration problem effectively to improve the thermal diffusivity, eliminated iron core skew hidden danger.
The design of above-mentioned iron core reactor structure all relates to the integral type and pours the manufacturing approach, has improved reactor inner structure, has realized the target of making an uproar that falls in the damping, nevertheless still continues to use traditional structural design, can not follow the vibration noise problem of solving in essence.
Namely, the disadvantages of the prior art: the traditional iron core reactor generally adopts a single-layer symmetrical structural design, and takes a three-phase three-column iron core reactor as an example, namely, in an iron core column consisting of a plurality of iron core cakes, the size of each iron core cake and the reserved air gap insulation width are the same, so that the reactor works, and because an electrical steel sheet is subjected to the combined action of magnetostrictive tension, Maxwell stress on air gap insulation and Lorentz force on a winding coil, vibration and stress are easily caused to be uneven, and noise radiation is aggravated.
Disclosure of Invention
The present invention is directed to a novel iron core reactor considering force compensation to solve the problems set forth in the above background art. In order to achieve the purpose, the invention provides the following technical scheme:
a novel iron core reactor considering force compensation comprises two layers of symmetrically distributed iron core column groups;
the iron core column group consists of a plurality of iron core columns, wherein each iron core column consists of a plurality of iron core cakes, a winding coil is sleeved outside each iron core column, and an air gap insulation cavity is formed between each winding coil and each iron core column;
and the width of the air gap insulation cavity is gradually reduced from one end close to the symmetrical plane of the iron core column group to the other end for force compensation.
When the three-phase input current phase difference pi/2 of the two layers of iron core column groups which are symmetrically distributed is controlled, the width of the air gap insulation cavity is gradually reduced from one end close to the symmetric plane of the iron core column groups to the other end, and when the input current phase difference of the two layers of winding coils is controlled, the stress of the two layers of structures is opposite to each other, so that the integral stress offset of the iron core reactor is realized; the design of a double-layer active vibration and noise reduction structure is completed, vibration and noise reduction is realized, and the service life of equipment is prolonged; convenience of engineering manufacture and application is improved, including convenience of operation; the initiative of vibration and noise reduction of the iron core reactor is actively realized, and the vibration and noise reduction is obvious; the service life is prolonged without increasing industrial cost and other external connection media; the service life of equipment is prolonged, and meanwhile, the industrial cost and other external media are not increased basically; the initiative and the significance of vibration reduction and noise reduction of the iron core reactor are realized, the convenience of engineering manufacture and application is improved, the convenience of operation is included, and the method is suitable for practical industrial application.
The problem of traditional iron core reactor generally adopt the symmetrical structure design of individual layer is solved, use three-phase three-column iron core reactor as an example, in the iron core post that comprises a plurality of iron core cakes promptly, every iron core cake size and the air gap insulation width of reserving are all the same, this makes the reactor during operation, because the common action of the maxwell stress that the electrician's steel sheet received magnetostrictive tension, air gap insulation received and the lorentz force that winding coil received, very easily arouse vibration and atress inequality, aggravate noise radiation.
In the novel iron core reactor of the present invention in which force compensation is considered: the iron core cake is composed of a plurality of electrical steel sheets which are overlapped together to form the iron core cake. The connection manner in which the core cakes are stacked together to form the core cake is the prior art and will not be described in detail herein.
In the novel iron core reactor of the present invention in which force compensation is considered: the iron core column formed by the plurality of iron core cakes is in a circular truncated cone shape, and the width of the air gap insulation cavity formed by matching with the winding coil is gradually reduced from one end close to the symmetrical plane of the iron core column group to the other end, so that the air gap insulation cavity is used for force compensation.
In the novel iron core reactor of the present invention in which force compensation is considered: and the two layers of iron core column groups are installed through iron yokes.
Further scheme: the iron yoke consists of a lower iron yoke, a middle iron yoke and an upper iron yoke;
the lower iron yoke, the middle iron yoke and the upper iron yoke are distributed in parallel and are fixed through a fastening mechanism;
the middle iron yoke is arranged between two layers of iron core column groups which are symmetrically distributed, and the two layers of iron core column groups are symmetrically distributed by taking the middle iron yoke as a symmetrical plane.
Preferably: the fastening mechanism includes a plurality of fastening rods for fixing the lower iron yoke, the middle iron yoke, and the upper iron yoke.
The fastening rod penetrates through the lower iron yoke, the middle iron yoke and the upper iron yoke, and is correspondingly fixed on two sides of the iron yoke body in the lower iron yoke, the middle iron yoke and the upper iron yoke by utilizing a plurality of bolts respectively for fixing.
Compared with the prior art, the invention comprises two layers of iron core column groups which are symmetrically distributed; the iron core column group consists of a plurality of iron core columns, wherein each iron core column consists of a plurality of iron core cakes, a winding coil is sleeved outside each iron core column, and an air gap insulation cavity is formed between each winding coil and each iron core column; and the width in air gap insulation chamber is the one end that is close to the iron core post group plane of symmetry and reduces the form to the other end gradually for the power compensation, its beneficial effect is:
1) convenience of engineering manufacture and application is improved, including convenience of operation; active and remarkable vibration and noise reduction; the service life is prolonged without increasing industrial cost and connecting other media;
2) the service life of equipment is prolonged, and meanwhile, the industrial cost and other external media are not increased basically;
3) convenience of engineering manufacture and application is improved, including convenience of operation;
4) and the improved novel structure is optimized to be suitable for practical industrial application.
Drawings
Fig. 1 is a schematic structural diagram of a novel iron-core reactor considering force compensation according to the present invention;
fig. 2 is a waveform diagram of input current of an upper reactor winding coil and a lower reactor winding coil in the novel iron core reactor considering force compensation.
In the figure: 1-electrical steel sheet; 2-core limb; 3-iron core cake; 4-a winding coil; 5-lower yoke; 6-a fastening mechanism; 7-middle iron yoke; 8-air gap insulation cavity; 9-upper yoke.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to specific embodiments. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
Aiming at the problem that the traditional iron core reactor generally adopts a single-layer symmetrical structure design, and taking a three-phase three-column iron core reactor as an example, namely, in an iron core column consisting of a plurality of iron core cakes, the size of each iron core cake and the reserved air gap insulation width are the same, so that when the reactor works, vibration and uneven stress are easily caused and noise radiation is aggravated due to the combined action of magnetostrictive tension on an electric steel sheet, Maxwell stress on air gap insulation and Lorentz force on a winding coil. In order to achieve the purpose, the invention provides the following technical scheme:
in the embodiment of the invention, as shown in fig. 1, a novel iron core reactor considering force compensation comprises two layers of iron core column groups which are symmetrically distributed; the iron core column group is composed of a plurality of iron core columns 2 (a plurality of iron core columns can be two, three, four), the number of the iron core columns is not limited as long as the iron core column group can be formed, wherein the iron core columns 2 are composed of a plurality of iron core cakes 3, winding coils 4 are sleeved outside the iron core columns 2, and air gap insulation cavities 8 are formed between the winding coils 4 and the iron core columns 2; and the width of the air gap insulation cavity 8 is gradually reduced from one end close to the symmetrical plane of the iron core column group to the other end for force compensation.
In the embodiment of the invention, when the three-phase input current phase difference pi/2 of two layers of iron core column groups which are symmetrically distributed is controlled (specifically, as shown in fig. 2, the input current waveform of a winding coil 4 is defined as an upper reactor winding coil and a lower reactor winding coil, wherein the winding coil 4 on the two layers of iron core column groups which are symmetrically distributed is defined as an upper reactor winding coil and a lower reactor winding coil), the width of an air gap insulation cavity 8 is gradually reduced from one end close to the symmetric plane of the iron core column groups to the other end, and when the input current phase difference of the two layers of winding coils is controlled, the stress of the two layers of structures is opposite to each other, so that the integral stress offset (force compensation) of the iron core reactor is realized; the design of a double-layer active vibration and noise reduction structure is completed, vibration and noise reduction is realized, and the service life of equipment is prolonged; convenience of engineering manufacture and application is improved, including convenience of operation; the initiative of vibration and noise reduction of the iron core reactor is actively realized, and the vibration and noise reduction is obvious; the service life is prolonged without increasing industrial cost and other external connection media; the service life of equipment is prolonged, and meanwhile, the industrial cost and other external media are not increased basically; the initiative and the significance of vibration reduction and noise reduction of the iron core reactor are realized, the convenience of engineering manufacture and application is improved, the convenience of operation is included, and the method is suitable for practical industrial application.
In the embodiment of the invention, as shown in fig. 1, the iron core cake 3 is composed of a plurality of electrical steel sheets 1, and the electrical steel sheets 1 are stacked together to form the iron core cake 3. The connection of the core cake 3 formed by stacking together is prior art and will not be described in detail here.
In the embodiment of the invention, as shown in fig. 1, an iron core column 2 composed of a plurality of iron core cakes 3 is in a circular truncated cone shape, and then a winding coil 4 is matched to form an air gap insulation cavity 8, wherein the width of the air gap insulation cavity is gradually reduced from one end close to the symmetrical plane of the iron core column group to the other end, and the air gap insulation cavity is used for force compensation. Wherein, be the iron core post 2 of round platform form, can also be the terrace with edge form, perhaps the circular cone form, specific why kind of structure does not do the restriction, as long as can satisfy the width that cooperation winding coil 4 formed air gap insulation chamber 8 and be close to the one end of iron core post group plane of symmetry and reduce the form gradually to the other end and be used for power compensation, preferentially, by a plurality of iron core post 2 that iron core cake 3 constitutes is the round platform form.
In the embodiment of the invention, as shown in fig. 1, the two layers of iron core column sets are installed through iron yokes. Specifically, the iron yoke is composed of a lower iron yoke 5, a middle iron yoke 7 and an upper iron yoke 9; the lower iron yoke 5, the middle iron yoke 7 and the upper iron yoke 9 are distributed in parallel and fixed by a fastening mechanism 6; the middle iron yoke 7 is arranged between two layers of iron core column groups which are symmetrically distributed, and the two layers of iron core column groups are symmetrically distributed by taking the middle iron yoke 7 as a symmetrical plane.
The fastening mechanism 6 includes a plurality of fastening rods for fixing the lower iron yoke 5, the middle iron yoke 7, and the upper iron yoke 9. The fastening rod is inserted through the lower iron yoke 5, the middle iron yoke 7 and the upper iron yoke 9, and is respectively and correspondingly fixed on two sides of the iron yoke body in the lower iron yoke 5, the middle iron yoke 7 and the upper iron yoke 9 by a plurality of bolts for fixing.
The invention comprises two layers of iron core column groups which are symmetrically distributed; the iron core column group consists of a plurality of iron core columns 2, wherein the iron core columns 2 consist of a plurality of iron core cakes 3, a winding coil 4 is sleeved outside the iron core columns 2, and an air gap insulation cavity 8 is formed between the winding coil 4 and the iron core columns 2; the width of the air gap insulation cavity 8 is gradually reduced from one end close to the symmetrical plane of the iron core column group to the other end and is used for force compensation; the width of the air gap insulation cavity 8 is gradually reduced from one end close to the symmetrical plane of the iron core column group to the other end, so that the stress of the two layers of structures is opposite to each other, and the integral stress offset of the iron core reactor is realized; convenience of engineering manufacture and application is improved, including convenience of operation; active and remarkable vibration and noise reduction; the service life is prolonged without increasing industrial cost and connecting other media; the initiative and the significance of vibration and noise reduction of the iron core reactor are realized; the service life of the equipment is prolonged, and meanwhile, the industrial cost and other external media are not increased basically; the improved novel structure is optimized for practical industrial applications.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
While the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (5)
1. A novel iron core reactor considering force compensation is characterized in that,
comprises two layers of iron core column groups which are symmetrically distributed;
the iron core column group consists of a plurality of iron core columns, wherein each iron core column consists of a plurality of iron core cakes, a winding coil is sleeved outside each iron core column, and an air gap insulation cavity is formed between each winding coil and each iron core column;
the width of the air gap insulation cavity is gradually reduced from one end close to the symmetrical plane of the iron core column group to the other end and is used for force compensation;
the two layers of iron core column groups are installed through iron yokes; the iron yoke consists of a lower iron yoke, a middle iron yoke and an upper iron yoke;
the lower iron yoke, the middle iron yoke and the upper iron yoke are distributed in parallel and are fixed through a fastening mechanism;
the middle iron yoke is arranged between two layers of iron core column groups which are symmetrically distributed, and the two layers of iron core column groups are symmetrically distributed by taking the middle iron yoke as a symmetrical plane.
2. The new type iron-core reactor considering force compensation as claimed in claim 1, characterized in that the iron core cake is composed of a plurality of electrical steel sheets, which are stacked together to form the iron core cake.
3. The novel iron-core reactor considering force compensation according to claim 1, wherein the iron core column formed by the plurality of iron core cakes is in a circular truncated cone shape, and the width of the air-gap insulation cavity formed by the winding coil is gradually reduced from one end close to the symmetry plane of the iron core column group to the other end for force compensation.
4. The new type of iron-core reactor considering force compensation as claimed in claim 1, characterized in that the fastening mechanism includes a plurality of fastening rods for fixing the lower, middle and upper iron yokes.
5. The novel iron-core reactor considering force compensation as claimed in claim 4, wherein the fastening rod is inserted through the lower iron yoke, the middle iron yoke and the upper iron yoke and is respectively fixed at both sides of the iron yoke body in the lower iron yoke, the middle iron yoke and the upper iron yoke by a plurality of bolts for fixation.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008113498A (en) * | 2006-10-30 | 2008-05-15 | Mitsui High Tec Inc | Laminated iron core, and manufacturing method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04357805A (en) * | 1991-06-04 | 1992-12-10 | Toshiba Corp | Gapped iron-core reactor |
| JPH0878248A (en) * | 1994-09-06 | 1996-03-22 | Toshiba Corp | Gapped iron core reactor |
| AR024092A1 (en) * | 1999-05-26 | 2002-09-04 | Abb Ab | INDUCTION DEVICES WITH DISTRIBUTED BURIALS |
| CN201859734U (en) * | 2010-10-12 | 2011-06-08 | 杭州银湖电气设备有限公司 | Novel low-noise dry-type iron-core electric reactor |
| CN101986402B (en) * | 2010-10-12 | 2012-02-29 | 杭州银湖电气设备有限公司 | Preparation method of novel low-noise dry iron-core reactor |
| CN205039045U (en) * | 2015-09-14 | 2016-02-17 | 广东新昇电业科技股份有限公司 | Reactor iron core structure with side board |
| CN108039269A (en) * | 2017-12-04 | 2018-05-15 | 重庆九能控股有限公司 | Iron core stem for reactor |
| CN210349549U (en) * | 2019-08-19 | 2020-04-17 | 天津经纬正能电气设备有限公司 | Novel structure of iron core reactor |
| CN211479824U (en) * | 2020-04-17 | 2020-09-11 | 株洲市希玛特变电工有限公司 | Assembled iron core reactor based on column iron silicon steel sheet slotting process |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008113498A (en) * | 2006-10-30 | 2008-05-15 | Mitsui High Tec Inc | Laminated iron core, and manufacturing method therefor |
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