CN215933366U - Hollow reactor - Google Patents
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- CN215933366U CN215933366U CN202121552101.1U CN202121552101U CN215933366U CN 215933366 U CN215933366 U CN 215933366U CN 202121552101 U CN202121552101 U CN 202121552101U CN 215933366 U CN215933366 U CN 215933366U
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Abstract
The present invention provides an air-core reactor, including: an air coil assembly, the air coil assembly comprising: a first air coil, a second air coil, and a third air coil; the central axis direction of the first air coil, the central axis direction of the second air coil and the central axis direction of the third air coil are parallel to each other, and the first air coil, the second air coil and the third air coil are distributed in a triangular shape on a section perpendicular to the central axis direction of the first air coil; yoke assembly, yoke assembly includes: a first iron yoke and a second iron yoke; the first iron yoke and the second iron yoke are respectively positioned at two ends of the hollow coil component along the central axis direction of the first hollow coil; the clamping mechanism penetrates through the first iron yoke and the second iron yoke and fixes the air-core coil assembly and the iron yoke assembly; the clamping mechanism is a detachable clamping mechanism. The embodiment of the utility model can reduce the magnetic flux entering the iron yoke, reduce the thickness of the iron yoke and reduce the material cost.
Description
Technical Field
The embodiment of the utility model relates to the field of reactors, in particular to an air-core reactor.
Background
The built-in air core reactor is a necessary component device in the technical realization of a large-impedance transformer. In an air-core reactor, an air-core coil structure is used to generate a linear reactance, and a yoke or the like is used to close a magnetic flux generated by the air-core coil structure. The air reactor also comprises a clamping structure, and the structural stability and the fault resistance of the whole air reactor are maintained through the clamping structure. In practice, air-core reactors are typically built into the tank of high impedance transformers in series relationship with the transformer windings to increase the short circuit impedance of the transformer during operation. In addition, because the power transmission and distribution in the power industry all adopt a three-phase system, correspondingly, an air-core reactor made of three phases is adopted to provide impedance for the transformer.
At present, in the existing air reactor structure, three air coils are generally arranged in sequence along the same straight line, and two ends of each air coil are fixed with an iron yoke through a clamping device.
The magnetic fluxes generated by three-phase air-core coils in the air reactor have equal amplitudes and 120-degree phase difference, and the sum of the three-phase magnetic fluxes is 0. With this configuration, since the air-core coils on both sides form a magnetic path communicating only with the center air-core coil, the magnetic flux generated by any one of the air-core coils on both sides is entirely introduced into the iron yoke between the one of the air-core coils and the center air-core coil. Thus, on the premise that the magnetic flux density of the iron yoke is constant, in order to ensure that the cross section of the iron yoke can pass through all the magnetic flux generated by a single air-core coil, the thickness of the iron yoke needs to be designed to be large enough, and therefore, the material cost is high.
SUMMERY OF THE UTILITY MODEL
In view of the above, embodiments of the present invention provide an air-core reactor, which at least partially solves the above technical problems.
An embodiment of the present invention provides an air-core reactor, including:
an air coil assembly, the air coil assembly comprising: a first air coil, a second air coil, and a third air coil; the first air coil, the second air coil and the third air coil are all columnar air coils; a central axis direction of the first air coil, a central axis direction of the second air coil, and a central axis direction of the third air coil are parallel to each other, and the first air coil, the second air coil, and the third air coil are distributed in a triangular shape on a cross section perpendicular to the central axis direction of the first air coil;
an iron yoke assembly, the iron yoke assembly comprising: a first iron yoke and a second iron yoke; the first iron yoke and the second iron yoke are respectively positioned at two ends of the hollow coil assembly along the central axis direction of the first hollow coil;
a clamping mechanism extending through the first and second yokes to secure the air coil assembly and the yoke assembly; the clamping mechanism is a detachable clamping mechanism.
Optionally, in an embodiment of the present invention, the first iron yoke has a cylindrical structure, a central axis of the first iron yoke passes through a geometric center of the equilateral triangle, and a projection area of each hollow coil in the hollow coil assembly in a direction of the respective central axis is located in a circular cross section of the first iron yoke; the second yoke is a cylindrical structure, the central axis of the second yoke passes through the geometric center of the equilateral triangle, and the projection area of each hollow coil in the hollow coil assembly in the direction of the central axis is located in the circular cross section of the second yoke.
Optionally, in an embodiment of the present invention, the thickness of the first iron yoke is smaller than a first preset thickness threshold h1And is greater than or equal to a second preset thickness threshold h2(ii) a The thickness of the second iron yoke is less than the first preset thickness threshold h1And is greater than or equal to the second predetermined thickness threshold h2；
The first preset thickness threshold h1And said second predetermined thickness threshold h2Satisfies the following formula:
phi is the magnetic flux generated by any one of the air coils in the air coil assembly; b is the magnetic flux density of the first iron yoke or the second iron yoke; r is a radius of a circular cross section of the first iron yoke or the second iron yoke. .
Optionally, in an embodiment of the present invention, the first yoke is a cylindrical structure with a circular cross section, a central axis of the first yoke passes through a geometric center of the equilateral triangle, and a projection area of each hollow coil in the hollow coil assembly in a direction of the respective central axis is located in the circular cross section of the first yoke; the second iron yoke is of a cylindrical structure with a circular ring-shaped cross section, the central axis of the second iron yoke passes through the geometric center of the equilateral triangle, and the projection areas of the hollow coils in the hollow coil assembly in the directions of the respective central axes are located in the circular ring-shaped cross section of the second iron yoke.
Optionally, in an embodiment of the present invention, the first iron yoke and the second iron yoke have the same structure and size.
Optionally, in an embodiment of the present invention, the clamping mechanism includes: a first clamping assembly, a second clamping assembly and a third clamping assembly; the first clamping assembly, the second clamping assembly and the third clamping assembly are all detachable clamping assemblies;
the first clamping assembly penetrates through the first iron yoke, the first air coil and the second iron yoke in sequence along the central axis direction of the first air coil to fix the first air coil and the iron yoke assembly;
the second clamping assembly penetrates through the first iron yoke, the second air coil and the second iron yoke in sequence along the central axis direction of the second air coil to fix the second air coil and the iron yoke assembly;
and the third clamping assembly sequentially penetrates through the first iron yoke, the third air-core coil and the second iron yoke along the central shaft direction of the first air-core coil, and fixes the third air-core coil and the iron yoke assembly.
Optionally, in an embodiment of the present invention, the clamping mechanism includes: a fourth clamping assembly; the fourth clamping assembly is a detachable clamping assembly;
and the fourth clamping assembly sequentially penetrates through the central shaft of the first iron yoke and the central shaft of the second iron yoke to fix the hollow coil assembly and the iron yoke assembly.
Optionally, in an embodiment of the utility model, the clamping mechanism comprises: a first clamping shim, a second clamping shim, and a fifth clamping assembly;
the first clamping washer is positioned on one side of the first iron yoke, which is far away from the air-core coil assembly;
the second clamping washer is positioned on one side of the second iron yoke far away from the air-core coil assembly;
the fifth clamping assembly sequentially penetrates through the first clamping shim, the first iron yoke, the second iron yoke and the second clamping shim along the central axis of the first iron yoke to fix the air-core coil assembly and the iron yoke assembly; the fifth clamping assembly is a detachable clamping assembly.
Optionally, in an embodiment of the present invention, the fifth clamping assembly includes: a clamping screw and a clamping nut;
the clamping screw comprises: a cylindrical screw portion and a locating head; the positioning head is positioned at one end of the columnar screw rod part, and a positioning structure in the clamping screw rod is attached to the first clamping gasket so as to position the clamping screw rod; the cylindrical screw part in the clamping screw is along the central shaft of the first iron yoke, sequentially penetrates through the first clamping gasket, the first iron yoke, the second iron yoke and the second clamping gasket, and is matched with the clamping nut to fix the hollow coil assembly and the iron yoke assembly.
Optionally, in an embodiment of the present invention, the fifth clamping assembly includes: the clamping screw, the first clamping nut and the second clamping nut;
the clamping screw is a columnar screw, and the clamping screw sequentially penetrates through the first clamping gasket, the first iron yoke, the second iron yoke and the second clamping gasket along a central shaft of the first iron yoke;
the first clamping nut and the second clamping nut are respectively positioned at two ends of the clamping screw and are matched with the threads on the surface of the clamping screw so as to fix the hollow coil assembly and the iron yoke assembly.
Alternatively, in an embodiment of the present invention, the first air coil, the second air coil, and the third air coil are distributed in an equilateral triangle shape on a cross section perpendicular to a central axis direction of the first air coil.
Optionally, in an embodiment of the present invention, an insulating spacer is disposed between the air-core coil assembly and the iron yoke assembly.
Optionally, in an embodiment of the utility model, the air core reactor is a reactor in a power transformer.
In the embodiment of the present invention, the three air coils in the air-core coil assembly are distributed in a triangular shape on a cross section perpendicular to the central axis direction of the air coil, so that the three air coils are adjacent to each other, and for any one air coil, there are two communicating magnetic paths between the air coil and the other two air coils, so that the magnetic fluxes generated by the air coils enter two different magnetic paths, specifically: part of the magnetic flux enters the iron yoke between the air core coil and the adjacent air core coil on the left side, and the rest of the magnetic flux enters the iron yoke between the air core coil and the adjacent air core coil on the right side, so that a magnetic flux compensation effect is formed in the iron yoke. Compared with the existing air reactor, the air reactor provided by the embodiment of the utility model can effectively reduce the magnetic flux entering the iron yoke on the premise that the magnetic flux generated by a single air coil is not changed, so that the thickness of the iron yoke can be reduced, and the material cost is reduced.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural diagram of an air-core reactor according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first iron yoke according to an embodiment of the present invention;
FIG. 3 is a schematic view of the magnetic flux path of a hollow coil assembly in an air reactor of the present invention;
fig. 4 is a schematic structural diagram of a first iron yoke according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of an air-core reactor according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of an air-core reactor according to still another embodiment of the present invention.
List of reference numerals:
10: an air-core coil assembly; 101: a first air-core coil; 102: a second air-core coil; 103: a third air-core coil;
20: an iron yoke assembly; 201: a first iron yoke; 202: a second iron yoke;
30: a clamping mechanism; 301: a first clamping assembly; 302: a second clamping assembly; 303: a third clamping assembly; 304: a fourth clamping assembly;
40: an insulating spacer;
Φ1: the magnetic flux generated by the first air coil 101;
Φ2: magnetic flux generated by the second air coil 102;
Φ3: magnetic flux generated by the third air coil 103;
ΦA: magnetic flux entering the yoke between the first air coil 101 and the second air coil 102;
ΦB: magnetic flux entering the yoke between the second air coil 102 and the third air coil 103;
ΦC: magnetic flux entering the yoke between the first air coil 101 and the third air coil 103.
Detailed Description
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that the terms "first," "second," and the like as used in the description and in the claims do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
The following further describes specific implementation of the embodiments of the present invention with reference to the drawings.
Fig. 1 is a schematic structural diagram of an air-core reactor according to an embodiment of the present invention. Referring to fig. 1, the air core reactor includes:
an air coil assembly 10, the air coil assembly 10 comprising: a first air coil 101, a second air coil 102, and a third air coil 103; the first air coil 101, the second air coil 102 and the third air coil 103 are all columnar air coils; the central axis direction of the first air coil 101, the central axis direction of the second air coil 102, and the central axis direction of the third air coil 103 are parallel to each other, and the first air coil 101, the second air coil 102, and the third air coil 103 are distributed in a triangular shape on a cross section perpendicular to the central axis direction of the first air coil 101;
a clamping mechanism 30, wherein the clamping mechanism 30 penetrates through the first iron yoke 201 and the second iron yoke 202 to fix the air-core coil assembly 10 and the iron yoke assembly 20; the clamping mechanism 30 is a detachable clamping mechanism.
In the embodiment of the present invention, the three air coils in the air-core coil assembly 10 are distributed in a triangular shape on the cross section perpendicular to the central axis direction of the air coil, so that the three air coils are adjacent to each other, and for any air coil, there are two communicating magnetic paths between the air coil and the other two air coils, so that the magnetic flux generated by the air coil enters two different magnetic paths, specifically: part of the magnetic flux enters the iron yoke between the air core coil and the adjacent air core coil on the left side, and the rest of the magnetic flux enters the iron yoke between the air core coil and the adjacent air core coil on the right side, so that a magnetic flux compensation effect is formed in the iron yoke. Compared with the existing air reactor, the air reactor provided by the embodiment of the utility model can effectively reduce the magnetic flux entering the iron yoke on the premise that the magnetic flux generated by a single air coil is not changed, so that the thickness of the iron yoke can be reduced, and the material cost is reduced.
Meanwhile, in the embodiment of the utility model, the air-core coil assembly 10 and the iron yoke assembly 20 are fixed through the detachable clamping mechanism 30, so that the air-core reactor provided by the embodiment of the utility model is convenient to detach and maintain.
In addition, compare with the air core reactor that current three air core coil is linear distribution, the air core reactor that three air core coil that this application embodiment provided is triangular distribution, and the structure is compacter, consequently, can effectively save space.
Alternatively, referring to fig. 2, in an embodiment of the present invention, the first iron yoke 201 has a cylindrical structure. Further, in the air core reactor, the central axis of the first iron yoke 201 passes through the geometric center of a triangle surrounded by three air-core coils of the air-core coil assembly 10 in a cross section perpendicular to the central axis direction of the air-core coils, and the projection areas of the respective air-core coils in the air-core coil assembly 10 in the respective central axis directions are located within the circular cross section of the first iron yoke 201; accordingly, the second iron yoke 202 may have a cylindrical structure; in the air core reactor, the central axis of the second iron yoke 202 also passes through the geometric center of a triangle surrounded by the three air coils of the air core coil assembly 10 in a cross section perpendicular to the central axis direction of the air core coils, and the projection areas of the respective air coils in the air core coil assembly 10 in the respective central axis directions are also located within the circular cross section of the second iron yoke 201.
Optionally, in an embodiment of the present invention, the thickness of the first iron yoke 201 of the cylindrical structure is smaller than a first preset thickness threshold and greater than or equal to a second preset thickness threshold; the thickness of the second iron yoke 202 with a cylindrical structure is smaller than a first preset thickness threshold and greater than or equal to a second preset thickness threshold.
First predetermined thickness threshold h1And a second predetermined thickness threshold h2Satisfies the following formula:
where φ is the magnetic flux generated by any of the air coils in the air coil assembly 10; b is the magnetic flux density of the first iron yoke 201 or the second iron yoke 202; r is a radius of a circular cross section of the first iron yoke 201 or the second iron yoke 202.
Specifically, the method comprises the following steps: referring to fig. 3, fig. 3 is a schematic view of the magnetic flux path of the hollow coil assembly 10 in the air reactor of the present invention, wherein Φ1、Φ2And phi3Since the three air coils in this embodiment are adjacent air coils, there are two communicating magnetic paths between each air coil and the other two air coils, and the magnetic paths generated by the three air coils are symmetrical, that is: referring to the left side view in fig. 3, a magnetic flux Φ entering the iron yoke (first iron yoke or second iron yoke) between the first air coil 101 and the second air coil 102AAnd a magnetic flux Φ entering an iron yoke (first iron yoke or second iron yoke) between the second air coil 102 and the third air coil 103BAnd intoMagnetic flux Φ of yoke (first yoke or second yoke) inserted between first air coil 101 and third air coil 103CAre equal in amplitude and differ in phase by 120.
See the right hand side of FIG. 3, due to Φ1、Φ2And phi3Are equal in amplitude and differ in phase by 120 °; phiA、ΦBAnd phiCAre equal in magnitude and differ in phase by 120 deg., and phiCAnd phi1Is equal to phiA；ΦAAnd phi2Is equal to phiB；ΦBAnd phi3Is equal to phiCThus, it is calculated thatA、ΦBAnd phiCAre all equal to phi1Magnitude of (magnetic flux generated by single air-core coil)
The ratio of (a) to (b).
In conclusion: in the embodiment of the utility model, the magnetic flux passing through the iron yoke (the first iron yoke or the second iron yoke) is only the magnetic flux generated by the single air core coil and the magnetic flux generated by the single air core coil
Therefore, under the premise that the magnetic flux density of the iron yoke is constant, the thickness of the iron yoke can be: any thickness value greater than or equal to a second preset thickness threshold, wherein the second preset thickness threshold is equal to the first preset thickness threshold and
and the first predetermined thickness threshold is equal to the ratio of the magnetic flux generated by any one of the air coils in the air-core coil assembly 10 to the magnetic flux density of the first yoke 201 divided by the radius of the circular cross section of the first yoke 201.
In the existing air-core reactor, the magnetic flux passing through the yoke is the whole magnetic flux generated by the air-core coil, and further, in the prior art, the thickness value range of the yoke should be: greater than or equal to the first preset thickness threshold.
Compared with the prior art, the air reactor provided by the embodiment of the utility model has the advantages that the thickness of the iron yoke can be set to be smaller on the premise that the magnetic flux generated by a single air coil is not changed, so that the material cost can be effectively reduced compared with the prior air reactor.
Alternatively, referring to fig. 4, in an embodiment of the present invention, the first iron yoke 201 has a cylindrical structure with a circular ring-shaped cross section. In the air-core reactor, the central axis of the first iron yoke 201 passes through the geometric center of a triangle surrounded by three air-core coils of the air-core coil assembly 10 on a section perpendicular to the central axis direction of the air-core coils, and the projection areas of the air-core coils in the air-core coil assembly 10 in the central axis directions of the air-core coils are located in the circular section of the first iron yoke 201; the second iron yoke 202 is also a cylindrical structure with a circular ring-shaped cross section, the central axis of the second iron yoke 202 also passes through the geometric center of a triangle surrounded by the three air coils of the air-core coil assembly 10 on the cross section perpendicular to the central axis direction of the air-core coil, and the projection areas of the air coils in the air-core coil assembly 10 in the respective central axis directions are also located in the circular ring-shaped cross section of the second iron yoke 202.
Compared with the iron yoke with the circular section, the iron yoke with the circular section can be directly wound by silicon steel sheets with the same width, so that the manufacturing process is simpler; in the latter case, the central position is empty, so that less material is needed, and the material cost can be effectively saved.
In the embodiment of the present invention, the first iron yoke 201 may be the same as or different from the second iron yoke 202, and is not limited thereto. Alternatively, in an embodiment of the present invention, the first iron yoke 201 and the second iron yoke 202 may have the same structure and size for ease of manufacturing.
Further, according to the above analysis of the circular iron yoke, when the cross section of the first iron yoke 201 or the second iron yoke 202 is circular, the thickness of the first iron yoke 201 or the second iron yoke 202 can be represented by the following formula:
h4≤h≤h3
wherein the content of the first and second substances,
h is the thickness of the first iron yoke 201 or the second iron yoke 202; h is3A third predetermined thickness threshold; h is4A fourth preset thickness threshold; phi is the magnetic flux generated by any of the air coils in the air coil assembly 10; b is the magnetic flux density of the first iron yoke 201 or the second iron yoke 202; r is the radius of the outer great circle in the circular cross section of the first iron yoke 201 or the second iron yoke 202; r is a radius of an inner small circle in a circular cross section of the first iron yoke 201 or the second iron yoke 202.
In another embodiment of the present invention, the first iron yoke 201 and the second iron yoke 202 may have a columnar structure with a cross section having another shape, for example: the cross section may be a triangle, a shape obtained by chamfering three angles of the triangle, an ellipse or another polygon, and the like, and the cross section shape of the first iron yoke 201 and the second iron yoke 202 is not limited in the embodiment of the present invention.
Alternatively, referring to fig. 1, in one embodiment of the present invention, the clamping mechanism 30 may comprise: a first clamping assembly 301, a second clamping assembly 302, and a third clamping assembly 303; the first clamping assembly 301, the second clamping assembly 302 and the third clamping assembly 303 are all detachable clamping assemblies;
a first clamp 301 that penetrates the first yoke 201, the first air-core coil 101, and the second yoke 202 in this order along the center axis direction of the first air-core coil 101, and fixes the first air-core coil 101 and the yoke assembly 20;
a second clamp assembly 302 which penetrates the first yoke 202, the second air-core coil 102, and the second yoke 202 in this order along the central axis direction of the second air-core coil 102, and fixes the second air-core coil 102 and the yoke assembly 20;
the third clamp 303 penetrates the first iron yoke 201, the third air core coil 103, and the second iron yoke 202 in this order along the center axis direction of the third air core coil 103, and fixes the third air core coil 103 and the iron yoke assembly 20.
Further, in an embodiment of the present invention, the first air coil 101, the second air coil 102, and the third air coil 103 are distributed in an equilateral triangle shape in a cross section perpendicular to the central axis direction of the first air coil 101.
Referring to fig. 1, since each air core coil is provided with a separate clamping assembly corresponding thereto, when three air core coils are distributed in an equilateral triangle shape on a cross section of the central axis direction of the air core coil, the three clamping assemblies are also distributed in an equilateral triangle shape, and are analyzed from a mechanical angle: because the triangle itself has stability and the equilateral triangle has symmetry, the three clamping assemblies are stressed more uniformly, and the service life of the whole clamping mechanism 30 can be prolonged.
Alternatively, referring to fig. 5, in one embodiment of the present invention, the clamping mechanism 30 comprises: a fourth clamping assembly 304; the fourth clamp assembly 304 is a detachable clamp assembly;
the fourth clamping unit 304 sequentially penetrates the central axis of the first yoke 201 and the central axis of the second yoke 202, and fixes the air-core coil unit 10 and the yoke unit 20.
Specifically, compared with the scheme that a separate clamping component corresponding to each air core coil is arranged for each air core coil, only one clamping component is arranged in the whole reactor along the central axis of the first iron 201, so that the demand for the clamping components can be reduced, the material can be saved, and the material cost can be reduced; in addition, since the operational reliability of the equipment is affected by the number of parts included in the equipment, the smaller the number of parts, the lower the possibility of failure of the equipment, and correspondingly, the higher the reliability of the equipment, it is possible to improve the operational reliability of the reactor by providing only one clamp assembly in the entire reactor.
In addition, in addition to the air core reactor shown in fig. 5, in order to improve the operational reliability of the clamping mechanism 30, a clamping assembly penetrating the first yoke 201 and the second yoke 202 may be further provided between every two air core coils (outside the air core coils).
Alternatively, in an embodiment of the present invention, for an air-core reactor in which the first iron yoke 201 and the second iron yoke 202 are both cylindrical structures with circular ring-shaped cross sections, clamping shims may be added to both ends of the first iron yoke 201 and the second iron yoke 202, and then a clamping assembly may be disposed in the whole reactor along the central axis of the first iron yoke 201 to fix the air-core coil assembly 10 and the iron yoke assembly 20. Specifically, the method comprises the following steps: the clamping mechanism 30 includes: a first clamping pad (not shown), a second clamping pad (not shown), and a fifth clamping assembly (not shown);
a first clamping washer located on a side of the first yoke 201 remote from the air-core coil assembly 10;
a second clamping washer located on a side of the second yoke 202 remote from the air-core coil assembly 10;
a fifth clamping assembly, which sequentially penetrates the first clamping shim, the first yoke 201, the second yoke 202 and the second clamping shim along the central axis of the first yoke 201, and fixes the air-core coil assembly 10 and the yoke assembly 20; the fifth clamping assembly is a detachable clamping assembly.
Optionally, in an embodiment of the utility model, the fifth clamping assembly comprises: a clamping screw and a clamping nut;
a clamping screw comprising: a cylindrical screw portion and a locating head; the positioning head is positioned at one end of the columnar screw rod part, and a positioning structure in the clamping screw rod is attached to the first clamping gasket so as to realize the positioning of the clamping screw rod; the cylindrical screw portion of the clamping screw penetrates the first clamping washer, the first yoke 201, the second yoke 202, and the second clamping washer in this order along the central axis of the first yoke 201, and cooperates with the clamping nut to fix the air-core coil assembly 10 and the yoke assembly 20.
Optionally, in an embodiment of the utility model, the fifth clamping assembly comprises: the clamping screw, the first clamping nut and the second clamping nut;
the clamping screw is a columnar screw, and the clamping screw sequentially penetrates through the first clamping gasket, the first iron yoke 201, the second iron yoke 202 and the second clamping gasket along the central shaft of the first iron yoke 201;
and first and second clamping nuts respectively provided at both ends of the clamping screw and engaged with the threads of the surface of the clamping screw to fix the hollow coil block 10 and the yoke block 20.
In addition, any one of the first clamping assembly 301, the second clamping assembly 302, the third clamping assembly 303 and the fourth clamping assembly 304 may adopt the same structure as the fifth clamping assembly, such as: the method can comprise the following steps: a clamping screw and a clamping nut, or, may comprise: a clamping screw, a first clamping nut and a second clamping nut, and so on. For the connection relationship between any one of the clamping assemblies and other parts in the reactor, reference may be made to the fifth clamping assembly, which is not described herein again.
Alternatively, referring to fig. 6, in one embodiment of the present invention, an insulating spacer 40 is disposed between the air-core coil assembly 10 and the yoke assembly 20.
Specifically, since current exists in each air-core coil during the operation of the reactor, and the iron yoke itself has a conductive capability, in order to avoid a short circuit phenomenon between the air-core coil and the iron yoke and to improve the safety performance of the reactor, an insulating spacer 40 may be disposed between the air-core coil assembly 10 and the iron yoke assembly 20.
Alternatively, in one embodiment of the utility model, the air core reactor may be a reactor in a power transformer.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above are merely examples of the present invention, and are not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (12)
1. An air-core reactor, characterized in that the air-core reactor comprises:
an air coil assembly (10), the air coil assembly (10) comprising: a first air coil (101), a second air coil (102), and a third air coil (103); the first air coil (101), the second air coil (102) and the third air coil (103) are all columnar air coils; a central axis direction of the first air coil (101), a central axis direction of the second air coil (102), and a central axis direction of the third air coil (103) are parallel to each other, and the first air coil (101), the second air coil (102), and the third air coil (103) are distributed in a triangular shape on a cross section perpendicular to the central axis direction of the first air coil (101);
an iron yoke assembly (20), the iron yoke assembly (20) comprising: a first iron yoke (201) and a second iron yoke (202); the first iron yoke (201) and the second iron yoke (202) are respectively located at both ends of the air-core coil assembly (10) in a central axis direction of the first air-core coil (101);
a clamping mechanism (30), wherein the clamping mechanism (30) penetrates through the first iron yoke (201) and the second iron yoke (202) to fix the air-core coil assembly (10) and the iron yoke assembly (20); the clamping mechanism (30) is a detachable clamping mechanism.
2. An air-core reactor according to claim 1, characterized in that the first air-core coil (101), the second air-core coil (102), and the third air-core coil (103) are distributed in an equilateral triangle shape in a cross section perpendicular to a central axis direction of the first air-core coil (101);
the first iron yoke (201) is of a cylindrical structure, the central axis of the first iron yoke (201) passes through the geometric center of the equilateral triangle, and the projection areas of the hollow coils in the hollow coil assembly (10) in the directions of the respective central axes are all located in the circular cross section of the first iron yoke (201); the second iron yoke (202) is of a cylindrical structure, the central axis of the second iron yoke (202) passes through the geometric center of the equilateral triangle, and the projection area of each hollow coil in the hollow coil assembly (10) in the direction of the respective central axis is located in the circular cross section of the second iron yoke (202).
3. Air-core reactor according to claim 1, characterized in that the thickness of the first iron yoke (201) is smaller than a first preset thickness threshold h1And is greater than or equal to a second preset thickness threshold h2(ii) a The thickness of the second iron yoke (202) is less than the first preset thickness threshold h1And is greater than or equal to the second predetermined thickness threshold h2；
The first preset thickness threshold h1And said second predetermined thickness threshold h2Satisfies the following formula:
phi is the magnetic flux generated by any one air core coil in the air core coil assembly (10); b is the magnetic flux density of the first iron yoke (201) or the second iron yoke (202); r is the radius of the circular section of the first iron yoke (201) or the second iron yoke (202).
4. An air-core reactor according to claim 1, characterized in that the first air-core coil (101), the second air-core coil (102), and the third air-core coil (103) are distributed in an equilateral triangle shape in a cross section perpendicular to a central axis direction of the first air-core coil (101);
the first iron yoke (201) is a cylindrical structure with a circular ring-shaped cross section, the central axis of the first iron yoke (201) passes through the geometric center of the equilateral triangle, and the projection areas of the hollow coils in the hollow coil assembly (10) in the directions of the central axes are all located in the circular ring-shaped cross section of the first iron yoke (201); the second iron yoke (202) is of a cylindrical structure with a circular ring-shaped cross section, the central axis of the second iron yoke (202) passes through the geometric center of the equilateral triangle, and the projection areas of the hollow coils in the hollow coil assembly (10) in the directions of the respective central axes are all located in the circular ring-shaped cross section of the second iron yoke (202).
5. An air-core reactor according to any of claims 1-4, characterized in that the first iron yoke (201) and the second iron yoke (202) are identical in structure and size.
6. An air-core reactor according to claim 1, characterized in that the clamping mechanism (30) comprises: a first clamping assembly (301), a second clamping assembly (302), and a third clamping assembly (303); the first clamping assembly (301), the second clamping assembly (302) and the third clamping assembly (303) are all detachable clamping assemblies;
the first clamping assembly (301) sequentially penetrates the first iron yoke (201), the first air coil (101), and the second iron yoke (202) along a central axis direction of the first air coil (101) to fix the first air coil (101) and the iron yoke assembly (20);
the second clamping assembly (302) penetrates through the first iron yoke (201), the second air core coil (102) and the second iron yoke (202) in sequence along the central axis direction of the second air core coil (102), and fixes the second air core coil (102) and the iron yoke assembly (20);
the third clamp assembly (303) sequentially penetrates the first yoke (201), the third air-core coil (103), and the second yoke (202) in a direction of a central axis of the third air-core coil (103), and fixes the third air-core coil (103) and the yoke assembly (20).
7. An air-core reactor according to claim 3, characterized in that the clamping mechanism (30) comprises: a fourth clamping assembly (304); the fourth clamping assembly (304) is a detachable clamping assembly;
and the fourth clamping assembly (304) penetrates through the central shaft of the first iron yoke (201) and the central shaft of the second iron yoke (202) in sequence to fix the hollow coil assembly (10) and the iron yoke assembly (20).
8. An air-core reactor according to claim 4, characterized in that the clamping mechanism (30) comprises: a first clamping shim, a second clamping shim, and a fifth clamping assembly;
the first clamping gasket is positioned on one side, away from the hollow coil assembly (10), of the first iron yoke (201);
the second clamping gasket is positioned on one side of the second iron yoke (202) far away from the air-core coil assembly (10);
the fifth clamping assembly penetrates through the first clamping gasket, the first iron yoke (201), the second iron yoke (202) and the second clamping gasket in sequence along the central axis of the first iron yoke (201) to fix the hollow coil assembly (10) and the iron yoke assembly (20); the fifth clamping assembly is a detachable clamping assembly.
9. The air-core reactor according to claim 8, characterized in that the fifth clamping assembly comprises: a clamping screw and a clamping nut;
the clamping screw comprises: a cylindrical screw portion and a locating head; the positioning head is positioned at one end of the columnar screw rod part, and a positioning structure in the clamping screw rod is attached to the first clamping gasket so as to position the clamping screw rod; and a cylindrical screw part in the clamping screw sequentially penetrates through the first clamping gasket, the first iron yoke (201), the second iron yoke (202) and the second clamping gasket along a central shaft of the first iron yoke (201), and is matched with the clamping nut to fix the hollow coil assembly (10) and the iron yoke assembly (20).
10. The air-core reactor according to claim 8, characterized in that the fifth clamping assembly comprises: the clamping screw, the first clamping nut and the second clamping nut;
the clamping screw is a columnar screw, and the clamping screw sequentially penetrates through the first clamping gasket, the first iron yoke (201), the second iron yoke (202) and the second clamping gasket along a central axis of the first iron yoke (201);
the first clamping nut and the second clamping nut are respectively positioned at two ends of the clamping screw and are matched with the threads on the surface of the clamping screw so as to fix the hollow coil assembly (10) and the iron yoke assembly (20).
11. An air-core reactor according to claim 1, characterized in that an insulating spacer (40) is provided between the air-core coil assembly (10) and the iron yoke assembly (20).
12. An air-core reactor according to claim 1, characterized in that the air-core reactor is a reactor in a power transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121552101.1U CN215933366U (en) | 2021-07-07 | 2021-07-07 | Hollow reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121552101.1U CN215933366U (en) | 2021-07-07 | 2021-07-07 | Hollow reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215933366U true CN215933366U (en) | 2022-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121552101.1U Active CN215933366U (en) | 2021-07-07 | 2021-07-07 | Hollow reactor |
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| Country | Link |
|---|---|
| CN (1) | CN215933366U (en) |
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2021
- 2021-07-07 CN CN202121552101.1U patent/CN215933366U/en active Active
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Address after: 510000 No. 26, Jungong Road, East District, Guangzhou Economic and Technological Development Zone, Guangdong Province Patentee after: Guangzhou Siemens Energy Transformer Co.,Ltd. Address before: 510000 No. 26, Jungong Road, East District, Guangzhou Economic and Technological Development Zone, Guangdong Province Patentee before: SIEMENS TRANSFORMER (GUANGZHOU) Co.,Ltd. |
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