Iron core clamping structure and three-phase integrated shunt reactor

Abstract

The invention relates to an iron core clamping structure and a three-phase integrated shunt reactor. The iron core clamping structure comprises a cross beam, a clamping assembly and a fastening assembly. The cross beam abuts against the two ends of the core column and is used for limiting the position of the core column in the first direction. The clamping assembly is fixedly connected with the cross beam; the clamping assembly forms a fixing frame and is used for clamping and fixing the cross beam. The fastening assembly is connected with the cross beam and the clamping assembly and used for fastening the clamping assembly, the cross beam and the core column. Through the cross beam and the clamping assembly, displacement of the core column caused by vibration or mechanical shock is reduced, the operation stability of the reactor is improved, and the problem of excessive vibration is avoided; on an offshore wind power integral platform, by adding the fastening assembly, the integrality of the integral structure can be further improved, the integrality of the reactor can be improved, the special conditions of transportation, operation and the like of the offshore platform can be met, the overall weight and size are reduced, and the reactor can be conveniently installed in the special environment of the offshore platform.

Description

Technical Field

[0001] The present application relates to the technical field of reactors, and in particular to a core clamping structure and a three-phase integrated shunt reactor. Background Art

[0002] As the economically exploitable wind resources on land are becoming less and less, the global wind farm construction has shown a trend of developing from land to offshore. As a key area for the development of renewable energy, offshore wind power has entered a new period of development. Compared with land wind power, the energy efficiency of offshore wind power wind energy resources is 20% to 40% higher than that of land wind farms. It also has the characteristics of rich resources, high power generation utilization hours, no land occupation, stable operation, zero dust emissions and suitability for large-scale development. However, due to the constraints of special geographical environmental factors, offshore wind power stations have very high requirements for various technical parameters of power equipment, and strict requirements on product performance stability, weight, volume, etc.

[0003] At present, offshore wind power projects are mainly based on small-capacity, low-voltage reactors, which can better control reactor vibration, local overheating, installation volume and other problems. However, with the rapid development of offshore wind power technology, the demand for large-capacity, high-voltage reactors will surge. However, large-capacity 500kV voltage reactor products are usually single-phase structures. The space on the offshore platform is limited, and there is no space to install three single-phase reactors. Instead, a three-phase integrated structure is used. Summary of the invention

[0004] Based on this, it is necessary to provide a core clamping structure and a three-phase integrated shunt reactor to address the problems of excessive vibration, magnetic leakage and eddy current loss in offshore wind power reactors.

[0005] In a first aspect, the present application provides a core clamping structure suitable for a three-phase integrated shunt reactor, the structure comprising:

[0006] The crossbeam is abutted against both ends of the core column and is used to limit the position of the core column in the first direction; the crossbeam includes a connecting portion and a pressing portion, the pressing portion is connected to the core column; the pressing portion protrudes from the connecting portion, the core column is placed inside the protrusion, the pressing portion has the same cross-sectional shape as the core column, and is used to limit the position of the core column in the first direction;

[0007] The clamping assembly is fixedly connected to the connecting portion of the beam; the clamping assembly constitutes a fixed frame for clamping and fixing the beam;

[0008] The fastening assembly is connected with the crossbeam and the clamping assembly and is used for fastening the clamping assembly, the crossbeam and the core column.

[0009] In one embodiment, the clamping assembly includes a first clamping member and a second clamping member symmetrically arranged, and a third clamping member and a fourth clamping member symmetrically arranged;

[0010] The first clamping member and the third clamping member are located on the first plane; the second clamping member and the fourth clamping member are located on the second plane;

[0011] The first clamping member and the second clamping member are disposed at opposite ends of the crossbeam.

[0012] In one embodiment, the clamping assembly further includes a fifth clamping member and a sixth clamping member, wherein both ends of the fifth clamping member are connected to one end of the first clamping member and the second clamping member, and both ends of the sixth clamping member are connected to the other end of the first clamping member and the second clamping member.

[0013] In one embodiment, the fastening assembly includes:

[0014] The core column pull screw penetrates the core column and is connected with the cross beam, so as to fasten the cross beam and the core column.

[0015] In one embodiment, it also includes:

[0016] An upper yoke, wherein opposite surfaces of the upper yoke in the first direction are respectively connected to the cross beam and the core column, and opposite surfaces of the upper yoke in the second direction are respectively connected to the first clamping member and the second clamping member;

[0017] The lower yoke has opposite surfaces in the first direction connected to the cross beam and the core column respectively, and the opposite surfaces in the second direction connected to the third clamping member and the fourth clamping member respectively.

[0018] In one embodiment, it also includes:

[0019] The side yoke is connected to both ends of the clamping assembly and is used to increase the clamping force of the clamping assembly.

[0020] In one embodiment, it also includes:

[0021] A first through-core screw rod passes through the first clamping member, the second clamping member and the upper yoke, and the first through-core screw rod abuts against the first clamping member and the second clamping member;

[0022] The second through-core screw rod passes through the third clamping member, the fourth clamping member and the lower yoke, and the second through-core screw rod abuts against the third clamping member and the fourth clamping member.

[0023] In one embodiment, the core column pull screw includes:

[0024] A screw assembly, including a plurality of non-magnetic screws;

[0025] The rod seats are arranged at both ends of the screw rod assembly and are used to fix a plurality of non-magnetic screw rods.

[0026] In a second aspect, the present application provides a three-phase integrated shunt reactor, the reactor comprising an A-phase core column, a B-phase core column, a C-phase core column and a core clamping structure of any embodiment in the first aspect.

[0027] In one embodiment, the beams corresponding to the A-phase core column, the B-phase core column, and the C-phase core column of the reactor, the beams at both ends of one phase are electrically connected to the clamping assembly, and only one end of the beams of the other two phases are electrically connected to the clamping assembly.

[0028] The above-mentioned core clamping structure and three-phase integrated parallel reactor limit the position of the core column in the first direction and the second direction through the crossbeam and the clamping assembly, reduce the displacement of the core column due to vibration or mechanical impact, improve the stability of the reactor operation, and avoid the problem of excessive vibration; the size type of the crossbeam and the core column pull screw is matched with the core column, which can more evenly compress the core column and avoid the sliding of the core column as a whole; on the offshore wind power integrated platform, the integrity of the overall structure can be further improved by adding fastening components, the integrity of the reactor is improved, and the special conditions such as transportation and operation of the offshore platform can be met, the overall weight and volume are reduced, and it is convenient to install in the special environment of the offshore platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 This is a schematic structural diagram of the core clamping structure in some embodiments of the present application.

[0031] Figure 2 It is a schematic top view of the core clamping structure in some embodiments of the present application.

[0032] Figure 3 This is a schematic diagram of the structure of a three-phase integrated shunt reactor in some embodiments of the present application.

[0033] Figure 4 This is a structural schematic diagram used to illustrate the connection relationship between the third clamping member and the return yoke in some embodiments of the present application.

[0034] Figure 5 This is a structural schematic diagram for reflecting the connection relationship between the first clamping member, the second clamping member and the fifth clamping member in some embodiments of the present application.

[0035] Figure 6 This is a schematic structural diagram for illustrating the connection relationship between the pad, the crossbeam and the third clamping member in some embodiments of the present application.

[0036] Figure 7This is a schematic diagram of the structure of the core column pulling screw in some embodiments of the present application.

[0037] Figure 8 This is a schematic diagram of the structure of the upper beam of phase A in some embodiments of the present application.

[0038] Fig. 9 It is a side view of the core clamping structure in some embodiments of the present application.

[0039] Fig.10 This is a structural schematic diagram used to illustrate the connection relationship between the A-phase upper beam and the first clamping member in some embodiments of the present application.

[0040] Fig.11 This is a structural schematic diagram for illustrating the connection relationship between the first through-screw and the first clamping member and the second clamping member in some embodiments of the present application.

[0041] Description of Figure Numbers:

[0042] 102, first clamping member; 104, second clamping member; 106, third clamping member; 108, fourth clamping member; 110, fifth clamping member; 112, sixth clamping member; 114, upper yoke; 116, lower yoke; 118, side yoke; 120, suspension; 122, foot pad; 124, core system grounding; 126, clamp system grounding; 128, grounding wire; 202, A phase core column; 204, B phase core column; 206, C phase core column; 208, A phase upper beam; 210, A phase lower beam; 212, B phase upper beam; 214, B phase lower beam; 216, C phase upper beam; 218, C phase lower beam; 220, connecting part; 222, pressing part; 302, first through-core screw; 304, core column pull Screw; 306, screw assembly; 308, rod seat; 310, side pull screw; 312, installation screw insulation sleeve; 314, installation screw insulation pad; 316, upper yoke insulation; 318, foot fixing bolt; 320, foot screw insulation tube; 322, foot insulation pad; 324, foot steel washer; 326, foot anti-loosening disc spring; 328, foot fixing nut; 330, beam fixing bolt; 332, beam screw insulation tube; 334, beam insulation pad; 336, beam steel washer; 338, beam anti-loosening disc spring; 340, beam fixing nut; 342, beam insulation; 344, through-hole screw; 346, through-hole fixing nut; 348, through-hole steel washer; 350, through-hole insulation pad; 402, oil tank. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0047] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0049] The applicant noted that the previous offshore wind power projects were mainly based on small-capacity, low-voltage reactors, which can better control reactor vibration, local overheating, installation volume and other problems. However, with the rapid development of offshore wind power technology, the demand for large-capacity, high-voltage reactors will surge. However, large-capacity 500kV voltage reactor products are usually single-phase structures. The space on the offshore platform is limited and there is no installation space for three single-phase reactors. The use of a three-phase integrated structure is prone to excessive vibration, large leakage and eddy current losses, local overheating and other problems. However, the iron core structure of small-capacity, low-voltage reactors is not suitable for large-capacity three-phase integrated shunt reactors of 500kV offshore wind power, so a core structure with stable structure and leakage shielding is crucial.

[0050] In order to solve the above problems, firstly, referring to Figure 1 and Figure 2 An embodiment of the present application provides a core clamping structure, which is suitable for a three-phase integrated shunt reactor. The core clamping structure includes a crossbeam, a clamping assembly and a fastening assembly; the crossbeam abuts against both ends of the core column to limit the position of the core column in a first direction; the crossbeam includes a connecting portion and a clamping portion, and the clamping portion is connected to the core column; the clamping portion protrudes from the connecting portion, and the inside of the protrusion is used to place the core column. The clamping portion has the same cross-sectional shape as the core column and is used to limit the position of the core column in the first direction; the clamping assembly is fixedly connected to the connecting portion of the crossbeam; the clamping assembly constitutes a fixed frame for clamping and fixing the crossbeam; the fastening assembly is connected to the crossbeam and the clamping assembly to fasten the clamping assembly, the crossbeam and the core column.

[0051] Specifically, the clamping assembly is a frame structure, the core column is fixed in the clamping assembly by a crossbeam, and is limited by the clamping assembly and the crossbeam. The crossbeam is used to cover the core column, and the crossbeams are respectively arranged at both ends of the core column to press the two ends of the core column, and then the crossbeam is clamped by the clamping assembly to limit the position of the crossbeam in the vertical direction, thereby limiting the position of the core column in the horizontal and vertical directions. The fastening assembly passes through the crossbeam and the core column in the first direction, so that the crossbeam and the core column are more tightly connected; the fastening assembly passes through the clamping assembly and the crossbeam in the second direction, so that the connection between the clamping assembly and the crossbeam is tighter.

[0052] In this embodiment, the position of the core column in the first direction and the second direction is limited by the crossbeam and the clamping assembly, so as to reduce the displacement of the core column due to vibration or mechanical impact, improve the stability of the operation of the reactor, and avoid the problem of excessive vibration; the size type of the crossbeam and the core column pull screw is matched with the core column, so as to more evenly press the core column and avoid the sliding of the core column as a whole; on the integrated offshore wind power platform, the integrity of the overall structure can be further improved by adding fastening components, and the integrity of the reactor is improved to meet the special conditions of offshore platform transportation and operation, while reducing the weight and volume, so as to facilitate installation in the special environment of the offshore platform.

[0053] See also Figure 3 In the second aspect, an embodiment of the present application provides a three-phase integrated shunt reactor, the reactor comprising an A-phase core column 202, a B-phase core column 204, a C-phase core column 206 and a core clamping structure of any embodiment of the first aspect.

[0054] Among them, the core clamping structure is arranged in the oil tank 402, and the beams corresponding to the reactor phase A core column 202, phase B core column 204, and phase C core column 206, the beams at both ends of one phase are electrically connected to the clamping assembly, and the beams of the other two items have only one end electrically connected to the clamping assembly.

[0055] Specifically, the reactor includes an A-phase core column 202, a B-phase core column 204, and a C-phase core column 206, which correspond to an A-phase upper beam 208, an A-phase lower beam 210, a B-phase upper beam 212, a B-phase lower beam 214, a C-phase upper beam 216, and a C-phase lower beam 218. The A-phase upper beam 208 and the A-phase lower beam 210 are respectively arranged at both ends of the A-phase core column 202, the B-phase upper beam 212 and the B-phase lower beam 214 are respectively arranged at both ends of the B-phase core column 204, and the C-phase upper beam 216 and the C-phase lower beam 218 are respectively arranged at both ends of the C-phase core column 206 and fixed on the clamping assembly by a fastening assembly. Among the A-phase upper beam 208, the B-phase upper beam 212 and the C-phase upper beam 216, both ends of the upper beam corresponding to one phase core column in the second direction are electrically connected to the clamping assembly; only one end of the upper beam corresponding to the other two core columns is electrically connected to the clamping assembly. Among the A-phase lower beam 210, the B-phase lower beam 214 and the C-phase lower beam 218, both ends of the lower beam of the core column corresponding to the upper beam in the second direction are electrically connected to the clamping assembly; only one end of the lower beam corresponding to the other two phase core columns is electrically connected to the clamping assembly.

[0056] Exemplarily, the upper beam corresponding to the A-phase core column 202 is electrically connected to the clamping assembly at both ends in the first direction, and the upper beams corresponding to the B-phase core column 204 and the C-phase core column 206 have one and only one end electrically connected to the clamping assembly, and the other end is insulated from the clamping assembly; the lower beam corresponding to the A-phase core column 202 is electrically connected to the clamping assembly at both ends in the first direction, and the lower beams corresponding to the B-phase core column 204 and the C-phase core column 206 have one and only one end electrically connected to the clamping assembly, and the other end is insulated from the clamping assembly.

[0057] In this embodiment, the three-phase integrated shunt reactor is composed of a clamping assembly, a crossbeam and a core column. The core column and the clamping assembly are fixed into a whole through the crossbeams of each phase to form a stable frame with strong vibration resistance to solve problems such as excessive vibration, large leakage magnetic field and eddy current loss, and local overheating; and while ensuring the excellent performance of the reactor, the weight and volume of the product are reduced, which can effectively ensure the installation and operation of the overall offshore wind power platform.

[0058] Combination Figures 4 to 6 In some embodiments, the clamping assembly includes a symmetrically arranged first clamp 102 and a second clamp 104, and a symmetrically arranged third clamp 106 and a fourth clamp 108; the first clamp 102 and the third clamp 106 are located in the first plane; the second clamp 104 and the fourth clamp 108 are located in the second plane; the first clamp 102 and the second clamp 104 are arranged at opposite ends of the beam.

[0059] The first clamping member 102 and the second clamping member 104 are arranged at both ends of the beam along the second direction, and the first clamping member 102 and the second clamping member 104 are arranged along both ends of the upper beam 208 of the phase A, the upper beam 212 of the phase B, and the upper beam 216 of the phase C in the second direction, for clamping the upper beam 208 of the phase A, the upper beam 212 of the phase B, and the upper beam 216 of the phase C. The third clamping member 106 and the fourth clamping member 108 are arranged at both ends of the beam along the second direction, and the third clamping member 106 and the fourth clamping member 108 are arranged along both ends of the lower beam 210 of the phase A, the lower beam 214 of the phase B, and the lower beam 218 of the phase C in the second direction, for clamping the lower beam 210 of the phase A, the lower beam 214 of the phase B, and the lower beam 218 of the phase C. The first clamping member 102 and the third clamping member 106 are located in a first plane, the second clamping member 104 and the fourth clamping member 108 are located in a second plane, the crossbeam is located between the first plane and the second plane, and a stable frame is formed between the clamping assembly and the crossbeam for placing the core column.

[0060] Furthermore, the clamping assembly also includes a fifth clamping member 110 and a sixth clamping member 112 , wherein both ends of the fifth clamping member 110 are connected to one end of the first clamping member 102 and the second clamping member 104 , and both ends of the sixth clamping member 112 are connected to the other end of the first clamping member 102 and the second clamping member 104 .

[0061] Specifically, the middle parts of the first clamp 102 and the second clamp 104 are connected to the upper crossbeams of the core columns of each phase, and a gap is left between the upper crossbeams of the core columns of each phase, and the two ends of the first clamp 102 are respectively connected to the fifth clamp 110 and the sixth clamp 112, and the two ends of the second clamp 104 are respectively connected to the fifth clamp 110 and the sixth clamp 112, so that a complete closed frame is formed between the first clamp 102, the second clamp 104, the fifth clamp 110 and the sixth clamp 112, and correspondingly, the two ends of the third clamp 106 and the fourth clamp 108 are also connected by the clamps to form a closed frame.

[0062] Exemplarily, the fifth clamp 110 is insulated and connected to the first clamp 102 and the second clamp 104 through a mounting screw, an insulating layer is provided between the fifth clamp 110 and the upper yoke 114, a mounting screw insulating sleeve 312 is provided on the mounting screw, an insulating pad is provided between the fifth clamp 110 and the first clamp 102 and the second clamp 104, and finally tightened with a nut, and the fifth clamp 110 and the second clamp 104 are electrically connected by a grounding wire 128, and the fifth clamp 110 is connected to the first clamp 102 and the second clamp 104 at a single point to ensure that there is no short-circuit loop and one-point grounding. The core clamping structure also includes a foot 122, and the foot 122 is insulated and connected to the clamping assembly. The pulp-forming foot 122 screw insulation tube is installed on the foot 122 fixing bolt, and the foot 122 insulation pad is placed on the top of the pulp-forming insulation tube. The foot 122 insulation pad has a foot 122 steel washer on the upper end, and finally tightened by the foot 122 fixing nut. Both sides of the foot 122 are insulated and connected to the clamping assembly first, and finally the grounding wire 128 is used to connect the foot 122 to the clamping assembly at a single point to ensure that there is no short circuit loop and one point grounding.

[0063] In this embodiment, the clamping assembly forms two closed frames to avoid resonance or vibration at the edges of the clamping parts when vibration occurs; on the other hand, gaps are left between the beams to avoid damage caused by collision between the beam corresponding to any phase core column and the remaining beams due to vibration, thereby reducing the vibration of the reactor and improving stability on the offshore wind power platform and during transportation.

[0064] See also Figure 7 and Figure 8 In some embodiments, the fastening assembly includes a core column pull screw 304, which passes through the core column and is connected to the cross beam for fastening the cross beam and the core column.

[0065] Specifically, the crossbeam includes a connecting portion 220 and a clamping portion 222. The connecting portion 220 is connected to the clamping assembly, and the clamping portion 222 is connected to the core column. The clamping portion 222 protrudes from the connecting portion 220, and the core column is placed inside the protrusion. The clamping portion 222 has the same cross-sectional shape as the core column, and is used to limit the position of the core column in the horizontal direction to prevent the core column from sliding relative to the crossbeam. A through hole is opened in the center of the connecting portion 220, and the core column pull screw 304 passes through the through hole of the lower crossbeam, the core column, and the through hole of the upper crossbeam in sequence.

[0066] The core column pull screw 304 includes a screw assembly 306 and a rod seat 308. The end of the rod seat 308 away from the screw assembly 306 has the same size as the through hole on the cross beam, and is used to pass through the through hole and be fixed; the cross section of the end of the rod seat 308 close to the screw assembly 306 is larger than the cross section of the end of the rod seat 308 away from the screw, and is used to connect the screw assembly 306 and limit the position of the rod seat 308 relative to the cross beam. The screw assembly 306 includes a plurality of non-magnetic screws; the rod seat 308 is arranged at both ends of the screw assembly 306, and is used to fix the plurality of non-magnetic screws. Exemplarily, the cross section of the rod seat 308 close to the end of the screw assembly 306 is circular, and the diameter of the cross section is the same as the inner diameter of the core column; the non-magnetic screw is fixed on the surface of the rod seat 308 to form a complete core column pull screw 304; and the core column pull screw 304 matches the inner diameter of the core column.

[0067] In this embodiment, the size types of the cross beam and the core column pulling screw 304 are set according to the core column matching, which can compress the core column more evenly and avoid sliding and displacement of the core column as a whole; the specially designed core column pulling screw 304 not only improves the rigidity and toughness of the core column pulling screw 304 through the matching of multiple non-magnetic screws and the rod seat 308, but also more effectively withstands the multiple core column electromagnetic force required by the 500kV offshore wind power large-capacity three-phase integrated parallel reactor than the conventional core column clamping structure composed of a single independent screw.

[0068] Reference Figures 9 to 11 In some embodiments, it also includes an upper yoke 114, a lower yoke 116 and a side yoke 118; the opposite surfaces of the upper yoke 114 in the first direction are respectively connected to the cross beam and the core column, and the opposite surfaces of the upper yoke 114 in the second direction are respectively connected to the first clamping member 102 and the second clamping member 104; the opposite surfaces of the lower yoke 116 in the first direction are respectively connected to the cross beam and the core column, and the opposite surfaces of the lower yoke 116 in the second direction are respectively connected to the third clamping member 106 and the fourth clamping member 108; the side yoke 118 is connected to the clamping assembly to increase the clamping force of the clamping assembly.

[0069] Specifically, the opposite surfaces of the upper yoke 114 in the second direction are connected to the first clamp 102 and the second clamp 104 respectively; the opposite surfaces of the lower yoke 116 in the first direction are connected to the crossbeam and the core column respectively, and the opposite surfaces of the lower yoke 116 in the second direction are connected to the third clamp 106 and the fourth clamp 108 respectively. The upper yoke 114 and the lower yoke 116 form a complete magnetic circuit, so that the magnetic flux can circulate in the core column to ensure the electromagnetic performance of the reactor. A plurality of return yokes 118 are provided on the first plane and the second plane respectively, and the two ends of the first clamp 102 and the third clamp 106 are connected on the first plane through two return yokes 118, and the two ends of the second clamp 104 and the fourth clamp 108 are connected on the second plane through two return yokes 118, and a cage structure is formed between the clamping assembly and the return yoke 118. Optionally, the return yoke 118 is connected to the third clamp 106, and is connected to the first clamp 102 through the suspension 120.

[0070] Further, the fastening assembly further includes a first through-core screw 302 and a second through-core screw; the first through-core screw 302 penetrates the first clamp 102, the second clamp 104 and the upper yoke 114, and the first through-core screw 302 abuts against the first clamp 102 and the second clamp 104; the second through-core screw penetrates the third clamp 106, the fourth clamp 108 and the lower yoke 116, and the second through-core screw abuts against the third clamp 106 and the fourth clamp 108. Exemplarily, the upper yoke 114, the lower yoke 116 and the clamp assembly are correspondingly provided with a single row of through holes, and the side yoke 118 is correspondingly provided with a double row of through holes, which are insulated and fixedly connected by the through-core screw 3444. The through screw 344 is made of special non-magnetic material, and the surface of the through screw 344 is provided with external insulation of the through screw 344 to ensure insulation from the upper yoke 114, the lower yoke 116 and the side yoke 118; a through insulation pad 350 is installed between the clamping assembly and the through screw 344, and a through steel washer 348 is installed outside the through insulation pad 350, and finally tightened with the through fixing nut 346 to ensure insulation and no short-circuit ring.

[0071] In this embodiment, the upper yoke 114 and the lower yoke 116 form a complete magnetic circuit through the core column, so that the magnetic flux can achieve a complete cycle, ensuring the stability of the electromagnetic performance of the reactor. At the same time, the cooperation between the upper yoke 114, the lower yoke 116, the crossbeam and the clamping assembly further limits the displacement of the core column in the first direction, improves the rigidity and vibration resistance of the overall structure, and the upper yoke 114 and the lower yoke 116 provide a buffer for vibration; the side yoke 118 is connected to the clamping assembly, so that the entire core clamping structure is a cage structure, forming a multi-dimensional support system, while improving the clamping force of the clamping assembly on the core column. Avoid stress concentration at local stress points to prevent loosening or displacement; on the other hand, the side yoke 118 adopts a double-row through-hole design, which is fixed by a through-hole screw 344 and isolated by insulating material, ensuring that the side yoke 118 is mechanically stable while avoiding the generation of a short-circuit ring; the through-hole screw 344 is made of special non-magnetic material and has an additional insulating layer to effectively isolate the electrical contact with the upper yoke 114, the lower yoke 116, and the side yoke 118 to avoid short circuits.

[0072] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0073] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A core clamping structure, suitable for a three-phase integrated shunt reactor, characterized in that: The structure comprises: A crossbeam is abutted against two ends of the core column and is used to limit the position of the core column in the first direction; the crossbeam includes a connecting portion and a pressing portion, the pressing portion is connected to the core column; the pressing portion protrudes from the connecting portion, the core column is placed inside the protrusion, the pressing portion has the same cross-sectional shape as the core column, and is used to limit the position of the core column in the first direction; A clamping assembly is fixedly connected to the connecting portion of the crossbeam; the clamping assembly constitutes a fixed frame for clamping and fixing the crossbeam; A fastening assembly is connected to the crossbeam and the clamping assembly and is used to fasten the clamping assembly, the crossbeam and the core column.

2. The structure according to claim 1, characterized in that: The clamping assembly comprises a first clamping member and a second clamping member which are symmetrically arranged, and a third clamping member and a fourth clamping member which are symmetrically arranged; The first clamping member and the third clamping member are located on a first plane; the second clamping member and the fourth clamping member are located on a second plane; The first clamping member and the second clamping member are disposed at opposite ends of the crossbeam.

3. The structure according to claim 2, characterized in that: The clamping assembly also includes a fifth clamping member and a sixth clamping member, wherein both ends of the fifth clamping member are connected to one end of the first clamping member and the second clamping member, and both ends of the sixth clamping member are connected to the other end of the first clamping member and the second clamping member.

4. The structure according to claim 1, characterized in that The fastening assembly comprises: A core column pulling screw penetrates the core column and is connected to the cross beam, and is used for fastening the cross beam and the core column.

5. The structure according to claim 2, characterized in that: Also includes: An upper yoke, wherein opposite surfaces of the upper yoke in the first direction are respectively connected to the cross beam and the core column, and opposite surfaces of the upper yoke in the second direction are respectively connected to the first clamping member and the second clamping member; A lower yoke, wherein opposite surfaces of the lower yoke in the first direction are respectively connected to the cross beam and the core column, and opposite surfaces of the lower yoke in the second direction are respectively connected to the third clamping member and the fourth clamping member.

6. The structure according to claim 5, characterized in that Also includes: A side yoke is connected to both ends of the clamping assembly and is used to increase the clamping force of the clamping assembly.

7. The structure according to claim 5, characterized in that Also includes: A first through-core screw rod passes through the first clamping member, the second clamping member and the upper yoke, wherein the first through-core screw rod abuts against the first clamping member and the second clamping member; The second through-core screw passes through the third clamping member, the fourth clamping member and the lower yoke, and the second through-core screw abuts against the third clamping member and the fourth clamping member.

8. The structure according to claim 4, characterized in that The core column pull screw comprises: A screw assembly, including a plurality of non-magnetic screws; Rod seats are arranged at both ends of the screw assembly and are used to fix a plurality of non-magnetic screws.

9. A three-phase integrated shunt reactor, characterized in that: The reactor comprises an A-phase core column, a B-phase core column, a C-phase core column and the core clamping structure of any one of claims 1-8.

10. The reactor according to claim 9, characterized in that: The cross beams corresponding to the A-phase core column, the B-phase core column and the C-phase core column of the reactor, the cross beams at both ends of one phase are electrically connected to the clamping assembly, and only one end of the cross beams of the other two phases are electrically connected to the clamping assembly.

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