Low-noise extra-high voltage paralleling reactor iron core assembling process method

Abstract

The invention belongs to the field of paralleling reactors, and relates to a low-noise extra-high voltage paralleling reactor iron core assembly process method.The iron core comprises iron core columns, an upper cross beam, an upper pressing beam, lower foot pads and an iron yoke of a rectangular frame type structure, fourth pull screws are installed at the front ends and the rear ends of the left side and the right side of the periphery of the iron yoke, and fifth pull screws are installed at the front ends and the rear ends of the upper side and the lower side of the periphery of the iron yoke; a seventh pull screw rod is installed at the position close to an iron yoke inclined seam, first shock pads are installed between the fourth pull screw rod, the fifth pull screw rod and the seventh pull screw rod and the iron yoke, insulating base plates and second shock pads are installed between the upper cross beam, the upper pressing beam and the lower foot pad and the iron yoke, and an insulating rubber plate of an L-shaped structure is installed at the position, close to the iron yoke inclined seam, of the outer side of the iron yoke. According to the invention, the clamping force of the iron yoke is increased by adding the iron yoke clamping structure, and the transmission of noise is blocked while the vibration is reduced by adding the pull screw rod and arranging the insulating rubber plate at the inclined seam of the iron yoke; and by arranging a shock pad, noise generated by resonance of the pull screw rod is further reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of shunt reactors, and in particular relates to a process for assembling an iron core of a low-noise ultra-high voltage shunt reactor. Background Art

[0002] UHV transmission lines have an extremely long transmission distance and carry a huge transmission capacity. Under no-load or light-load operating conditions, the capacitance effect caused by the line capacitor is extremely significant, which in turn generates a large amount of reactive power, causing the voltage at the end of the line to rise sharply, far exceeding the normal operating voltage range, posing a serious threat to the insulation performance of the system, stable operation of equipment and many other aspects. With its own inductive reactive characteristics, the UHV shunt reactor can accurately and efficiently compensate for the excess reactive power generated by the line capacitor, keep the voltage along the line steadily within a reasonable range, and effectively lay a solid foundation for the voltage stability of the transmission system. Therefore, the UHV shunt reactor is an indispensable core equipment component in the UHV transmission network, deeply maintaining the safe and efficient operation of the entire UHV transmission system.

[0003] Although UHV shunt reactors play a significant role in the power transmission network, the noise problems generated during their operation are like a "chronic disease", which brings many difficult problems and negative impacts to the steady advancement and long-term operation and maintenance of power transmission and transformation projects. As for the internal working environment of the substation, the continuous and high-decibel noise deeply interferes with the normal inspection, equipment operation and on-duty work process of the operation and maintenance personnel. For the ecological environment of the surrounding communities, the daily life of residents around the substation is often ruthlessly broken by excessive noise.

[0004] In the noise generation mechanism of UHV shunt reactors, the iron core plays a "key role". Based on its inherent characteristics, traditional iron core reactors are born with vibration and are difficult to avoid. Specifically, its iron core adopts a special air gap structure design to construct a segmented iron core column. Under the periodic "drive" of alternating current, adjacent iron core discs are like being given the identity of "opposite magnetic poles". With the repeated changes of alternating current, periodic electromagnetic forces come into being and continue to act on the iron core column. This alternating electromagnetic force forces the iron core column to undergo periodic elastic deformation, which inevitably generates vibration. Vibration, as the "source power" of noise generation, eventually evolves into outward radiated noise through the multiple coupling effects of structural components such as iron cores and windings and surrounding media (such as air, transformer oil, equipment casing, etc.). It can be seen that the unique structural design of iron core reactors fundamentally determines the inevitability of its vibration, and noise has become a major bottleneck problem that has long plagued the improvement of reactor product performance and the optimization and development of power transmission and transformation projects.

[0005] At present, the existing noise reduction solutions in the industry have limitations to varying degrees. For example, simply relying on adding a soundproof cover to the outside of the equipment can block the noise propagation path to a certain extent. However, it is often difficult to achieve the desired noise reduction goal due to the rigid need for equipment heat dissipation and the limited physical installation space. The addition of a soundproof cover will undoubtedly increase the equipment purchase and installation costs and floor space requirements. Attempts to focus on optimizing the materials and processes of the core and windings themselves have made some achievements in optimizing electrical performance, but the suppression effect of low-frequency noise derived from core vibration under complex operating conditions is not satisfactory. Therefore, in-depth research and overcoming the core vibration problem, reducing the core vibration amplitude from the root, and reducing the noise level of the reactor have become technical problems that need to be solved urgently. Summary of the invention

[0006] In view of the above technical problems, the present invention provides a low-noise ultra-high voltage shunt reactor core assembly process method, and the technical solution adopted by the present invention is as follows: The invention discloses a method for assembling an iron core of a low-noise ultra-high voltage shunt reactor, wherein the iron core comprises an iron core column, an upper cross beam, an upper pressure beam, a lower pad and an iron yoke of a rectangular frame structure, and a pull screw rod passes through the frame of the rectangular frame structure, and the method comprises the following steps: Install a pull screw rod 4 on the left and right sides of the outer periphery of the iron yoke, install a pull screw rod 5 on the upper and lower sides of the outer periphery of the iron yoke, install a pull screw rod 7 at the two corners of the upper end of the inner periphery of the iron yoke near the oblique joint of the iron yoke, and the pull screw rods 4, 5 and 7 cooperate with the pull screw rod 6 to clamp the front and rear ends of the iron yoke, and install a shock-absorbing pad 1 between the pull screw rods 4, 5 and 7 and the iron yoke. By installing the pull screw rods 4, 5 and 7, the clamping force of the iron yoke in the horizontal direction is improved, and the vibration-absorbing pad 1 is used to prevent the pull screw rods from resonating and generating noise; An insulating pad and a second shock-absorbing pad are installed between the upper cross beam, the upper pressure beam, the lower pad and the iron yoke to prevent the above components from contacting the iron yoke and generating noise; An L-shaped insulating rubber sheet is installed on the outside of the iron yoke near the iron yoke bevel joint, and an insulating partition is installed between the insulating rubber sheet and the iron yoke. The insulating rubber sheet is installed to prevent noise from being transmitted outward, and the insulating partition is installed to prevent the iron yoke bevel joint from scratching the insulating rubber sheet.

[0007] Preferably, the iron yoke includes a side yoke, an upper iron yoke and a lower iron yoke, and both ends of the pull screw pass through the side yoke to connect to the side clamp, pass through the upper iron yoke to connect to the upper clamp, and pass through the lower iron yoke to connect to the lower clamp. The height of the upper iron yoke and the lower iron yoke is greater than the height of the upper clamp and the lower clamp, and the width of the side clamp is greater than the width of the side yoke.

[0008] Preferably, a hole is opened on the outer side of the side clamp at a position extending from the side yoke to install the pull screw rod 4, a punching piece 1 is welded on the outer side of the upper clamp and the lower clamp to install the pull screw rod 5, and a punching piece 2 is welded at the two corners of the upper end of the inner circumference of the iron yoke near the oblique joint of the iron yoke to install the pull screw rod 7.

[0009] Preferably, the shock-absorbing pad 1 is a long column with a rectangular cross-section, and a semicircular groove cooperating with the pull screw rods 4, 5 and 7 is provided in the length direction of the shock-absorbing pad 1, and the shock-absorbing pad 1 is made of elastic material.

[0010] Preferably, an upper cross beam is arranged above the upper iron yoke at a position corresponding to the iron core column, and a lower cross beam is arranged below the lower iron yoke at a position corresponding to the iron core column. Several circularly distributed through holes are correspondingly opened on the upper iron yoke, the upper cross beam, the lower iron yoke, the lower cross beam and the iron core column, and a pull screw is installed in the through hole.

[0011] Preferably, a pull screw disc spring 1 is mounted on the upper end of the pull screw 1, the pull screw disc spring 1 is located between the upper cross beam and the upper iron yoke, and steel washers are arranged at both ends of the pull screw disc spring 1.

[0012] Preferably, upper pressure beams are respectively installed on the left and right ends of the upper surface of the upper iron yoke, upper side beams are respectively installed on the left and right side surfaces of the upper iron yoke, lower side beams are respectively installed on the left and right side surfaces of the lower iron yoke, and lower pads are respectively installed on the left and right ends of the lower surface of the lower iron yoke, and the lower pads correspond to the positions of the upper pressure beams, and the two ends of the upper pressure beam and the lower pads are connected by a pull screw rod three, and a pull screw disc spring three is installed on the upper end of the pull screw rod three, and steel washers are arranged at both ends of the pull screw disc spring three, and a pull screw rod two in the vertical direction is respectively installed on the ends of the upper clamp and the lower clamp, and a pull screw disc spring two is installed on the upper end of the pull screw rod two, and steel washers are arranged at both ends of the pull screw disc spring two.

[0013] Preferably, binding holes are provided at both ends of the insulating rubber sheet, hooks are welded on the upper pressure beam, the horizontal ends of the insulating rubber sheet are fixed by binding with the hooks through the binding holes, the vertical ends of the insulating rubber sheet are fixed by binding with the pull screws through the binding holes, and insulating partitions are installed on the upper part of the upper beam and the lower part of the lower beam, and the cross-section of the insulating partition is L-shaped.

[0014] Preferably, the insulating rubber sheet is insulating paperboard and rubber pads stacked in layers, and the insulating partition is made of laminated wood.

[0015] Preferably, a plurality of vertical magnetic isolation slot plates are respectively and parallelly arranged on the webs of the matching upper and lower clamps, the cross-sectional width of the magnetic isolation slot plates is 3 mm, and the height of the magnetic isolation slot plates decreases in a step-like manner from the middle to both sides.

[0016] Beneficial effects of the present invention: The low-noise UHV reactor core of the present invention increases the clamping force of the iron yoke by adding an iron yoke clamping structure, and effectively reduces the vibration of the core by using an elastic clamping structure; reduces the vibration and blocks the propagation of noise by adding a pull screw and setting an insulating rubber plate at the oblique joint of the iron yoke; and further reduces the noise generated by the resonance of the pull screw by designing a damping pad with a groove between the outer clamping screw and the iron yoke. The core effectively blocks the transmission of noise by adding a variety of damping and noise reduction structures, thereby reducing the noise of the reactor, and has a significant overall noise reduction effect, which has a wide range of promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 A front view of an iron core according to an embodiment of the present invention; Figure 2 It is a left side view of the iron core of an embodiment of the present invention; Figure 3 A top view of an iron core according to an embodiment of the present invention; Figure 4 It is a schematic diagram of assembling the pull screw rod 2 according to an embodiment of the present invention; Figure 5 It is a schematic diagram of assembling a pull screw rod 1 according to an embodiment of the present invention; Figure 6 It is a schematic diagram of assembling the insulating pad and the shock absorbing pad 2 according to an embodiment of the present invention; Figure 7 It is a schematic diagram of assembling a shock-absorbing pad 1 according to an embodiment of the present invention; Figure 8 It is a structural schematic diagram of a shock-absorbing pad 1 according to an embodiment of the present invention; Fig. 9 It is a schematic diagram of assembling the insulating rubber plate and the insulating partition according to an embodiment of the present invention; Fig.10 It is a schematic structural diagram of an insulating partition according to an embodiment of the present invention; Fig.11 It is a schematic structural diagram of a magnetic isolation slot plate at the web of a clamp according to an embodiment of the present invention; Among them, 1. upper clamp, 2. upper iron yoke, 3. iron core column, 4. upper cross beam, 5. upper pressure beam, 6. lower pad, 7. pull screw one, 8. pull screw disc spring one, 9. pull screw two, 10. pull screw disc spring two, 11. pull screw three, 12. pull screw disc spring three, 13. insulating rubber plate, 14. insulating partition, 15. shock-absorbing pad one, 16. side yoke, 17. pull screw four, 18. magnetic isolation slot plate, 19. lower clamp, 20. hook, 21. upper side beam, 22. insulating pad, 23. shock-absorbing pad two, 24. iron yoke oblique joint, 25. lower iron yoke, 26. pull screw five, 27. pull screw six, 28. pull screw seven, 29. side clamp. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] like Figure 1-11 As shown, an embodiment of the present invention provides a low-noise ultra-high voltage shunt reactor core assembly process method, which designs and assembles a new core structure, including an upper clamp 1, an upper iron yoke 2, a core column 3, a side clamp 29, a side yoke 16, a lower clamp 19 and a lower iron yoke 25 and core assembly parts, wherein the upper iron yoke 2, the side yoke 16 and the lower iron yoke 25 form an iron yoke of a rectangular frame structure. The upper iron yoke 2, side yoke 16 and lower iron yoke 25 are all made of stacked silicon steel sheets, and the side yoke 16, the upper iron yoke 2 and the lower iron yoke 25 are respectively fixed with side clamps 29, upper clamps 1 and lower clamps 19 on the front and rear sides by pulling screws 6 27. The pulling screws 6 27 pass through the side clamps 29 and the side yoke 16, the upper clamps 1 and the upper iron yoke 2, the lower clamps 19 and the lower iron yoke 25, and then the two ends are fastened by nuts. The upper iron yoke 2, the side yoke 16 and the lower iron yoke 25 are clamped front and back by pulling screws 6 27, the side clamps 29, the upper clamps 1 and the lower clamps 19, so that the iron yokes are clamped and fixed in the horizontal direction. The heights of the upper iron yoke 2 and the lower iron yoke 25 are slightly larger than the heights of the upper clamps 1 and the lower clamps 19, and a section of the upper iron yoke 2 and the lower iron yoke 25 are exposed at the upper and lower ends of the upper clamps 1 and the lower clamps 19, and the width of the side clamps 29 is larger than the width of the side yoke 16.

[0020] In order to further improve the clamping force of the iron yoke to reduce noise, the embodiment of the present invention also provides a plurality of pull screws 4 17 on both sides of the outer periphery of the iron yoke, and a plurality of pull screws 5 26 at both ends of the outer periphery of the iron yoke. The portion extending from the outer side of the side clamp 29 is provided with a hole for installing the pull screws 4 17. The pull screws 4 17 are used to further improve the clamping force of the side yoke 16. A punching piece 1 is welded and installed on the outer sides of the upper clamp 1 and the lower clamp 19, and a pull screw 5 26 is installed on the punching piece 1. The pull screw 5 26 is used to further improve the clamping force of the upper iron yoke 2 and the lower iron yoke 25. In addition, a punching piece 2 is welded at the two corners of the upper end of the inner periphery of the iron yoke near the iron yoke bevel joint 24, and a pull screw 7 28 is installed on the punching piece 2. The pull screw 7 28 can improve the clamping force at the iron yoke bevel joint 24 and reduce the noise generated by the vibration of the iron yoke bevel joint 24.

[0021] A shock-absorbing pad 15 is fixedly installed between the side yoke 16 and the four-screw rod 17. The shock-absorbing pad 15 is a long column with a rectangular cross section. A semicircular groove matching the four-screw rod 17 is provided in the length direction of the shock-absorbing pad 15. The four-screw rod 17 is sleeved in the semicircular groove. One side of the shock-absorbing pad 15 is designed as a semicircular groove structure, which can facilitate the installation of the shock-absorbing pad 15 between the side yoke 16 and the four-screw rod 17. The material of the shock-absorbing pad 15 is elastic. The side yoke 16 and the four-screw rod 17 squeeze the shock-absorbing pad 15 by virtue of the thickness difference. The five-screw rod 26 and the seven-screw rod 28 are also installed with a shock-absorbing pad 15, and their installation position and installation method are the same as the four-screw rod 17. The shock-absorbing pad 15 can reduce the resonance of the four-screw rod 17, thereby reducing noise.

[0022] An upper crossbeam 4 is arranged above the upper iron yoke 2 at a position corresponding to the core column 3, and a lower crossbeam is arranged below the lower iron yoke 25 at a position corresponding to the core column 3. The upper crossbeam 4 and the lower crossbeam are fixedly connected to the upper clamp 1 and the lower clamp 19 by bolts. The upper iron yoke 2, the upper cross beam 4, the lower iron yoke 25 and the lower cross beam have several circular through holes corresponding to the positions of the iron core column 3. Several pull screws 7 penetrate the upper cross beam 4, the upper iron yoke 2, the iron core column 3, the lower iron yoke 25 and the lower cross beam through the circular through holes, and the upper cross beam 4, the upper iron yoke 2, the iron core column 3, the lower iron yoke 25 and the lower cross beam are reliably fixed and connected as one. The embodiment of the present invention increases the number of pull screws 7 to increase the vertical clamping force of the upper iron yoke 2 and the lower iron yoke 25 on the iron core column 3. The upper end of the pull screw 7 is also provided with a pull screw disc spring 8, which is located between the upper cross beam 4 and the upper iron yoke 2. Steel washers are provided at both ends of the pull screw disc spring 8, and the lower end of the pull screw 7 is screwed into the threaded hole opened on the lower cross beam. The clamping force of the pull screw 7 cooperates with the pull screw disc spring 8, and the elastic clamping can effectively reduce the noise generated at the connection of the above components.

[0023] The upper pressure beam 5 is fixedly installed at the left and right ends of the upper surface of the upper iron yoke 2, and the upper side beams 21 are fixedly installed at the left and right sides of the upper iron yoke 2. The upper pressure beam 5 and the upper side beam 21 are both flat plate structures, and the upper pressure beam 5 and the upper side beam 21 are fixedly connected to the upper iron yoke 2 by bolts. The lower side beams are fixedly installed at the left and right sides of the lower iron yoke 25, and the lower side beams are fixedly connected to the lower iron yoke 25 by bolts. The upper pressure beam 5 and the lower pad 6 are fixedly connected by the pull screw three 11. The upper end of the pull screw three 11 is provided with a pull screw disc spring three 12, and the two ends of the pull screw disc spring three 12 are provided with steel washers.

[0024] The end positions of the upper clamp 1 and the lower clamp 19 are respectively fixedly installed with a pull screw 9 in the vertical direction, and the upper end of the pull screw 9 is sleeved with a pull screw disc spring 10, and both ends of the pull screw disc spring 10 are provided with steel washers.

[0025] The core column 3 is composed of core cakes of different heights and air cushion blocks. After the core column 3 is assembled with the upper iron yoke 2 and the lower iron yoke 25, it is clamped up and down by multiple tension screws 7, and elastic compression is achieved by tension screw disc springs 8. Even if the core column 3 is subjected to alternating electromagnetic forces, it can still maintain a clamped state. The upper and lower clamping of the upper iron yoke 2 and the lower iron yoke 25 also includes tension screws 2 9 and tension screws 3 11, and tension screw disc springs 2 10 and tension screw disc springs 3 12 with elastic compression functions are installed on their upper ends, respectively, connecting the upper and lower iron yokes and the clamps into a rigid integral structure, reducing the vibration noise generated by their looseness.

[0026] The lower iron yoke 25 has lower pads 6 fixedly installed at the left and right ends of the lower surface, and the lower pads 6 correspond to the position of the upper pressure beam 5. An insulating pad 22 and a second shock-absorbing pad 23 are fixedly installed between the center of the lower pad 6 and the lower iron yoke 25. The second shock-absorbing pad 23 is adjacent to the lower pad 6. The insulating pad 22 plays an insulating role, and the second shock-absorbing pad 23 fills the gap formed by the assembly, effectively reducing the noise caused by vibration. The upper pressure beam 5 and the upper cross beam 4 are also provided with insulating pads 22 and second shock-absorbing pads 23.

[0027] An insulating rubber sheet 13 is fixedly installed at the iron yoke oblique joint 24 near the upper clamp 1 and the lower clamp 19. The insulating rubber sheet 13 is an L-shaped structure. The insulating rubber sheet 13 is made by bending a whole plate. The material of the insulating rubber sheet 13 is a layer of insulating cardboard and rubber pads that are staggered and stacked. Binding holes are opened at both ends of the insulating rubber sheet 13, and a hook 20 is welded on the side of the upper pressure beam 5. The horizontal end of the insulating rubber sheet 13 is bound and fixed to the hook 20 through the binding hole, and the vertical end of the insulating rubber sheet 13 is bound and fixed to the pull screw 4 17. In order to prevent the insulating rubber sheet 13 from overlapping with the iron yoke oblique joint 24 and being cut, an insulating partition 14 is fixedly installed on the upper part of the upper beam 21 and the lower part of the lower beam. The cross-section of the insulating partition 14 is L-shaped, and a groove is opened on the vertical side of the insulating partition 14 and a through hole is opened on the horizontal side. The insulating partition 14 is fixedly installed on the upper beam 21 and the lower beam through the through hole and bolts, and the groove can facilitate the tightening of the bolts. The edges of the insulating partition 14 need to be rounded, and the rounded edges of the insulating partition 14 are also to prevent the insulating rubber sheet 13 from being worn. By installing such a structure on the four side beams of the iron yoke, the noise transmission at the iron yoke oblique joint 24 can be further blocked. The insulating partition 14 is made of laminated wood.

[0028] Both the upper clamp 1 and the lower clamp 19 are equipped with clamp webs. On the sides of the clamp webs of the upper clamp 1 and the lower clamp 19 away from the core column 3, several vertical magnetic isolation slot plates 18 are arranged in parallel. The cross-sectional width of the magnetic isolation slot plates 18 is 3 mm. The width of 3 mm is the preferred size obtained based on simulation verification. At the same time, factors such as the strength of the entire clamp web are taken into consideration. The magnetic isolation slot plates 18 with a width of 3 mm can ensure the magnetic isolation effect. The height of the magnetic isolation slot plates 18 decreases in a stepped manner from the middle to both sides. A metal gap is formed between two adjacent magnetic isolation slot plates 18, which can prevent leakage magnetic flux from entering the clamp and prevent local overheating of the upper clamp 1 and the lower clamp 19.

[0029] The shock absorbing pad 15 and the shock absorbing pad 23 are made of nitrile rubber plates, which can eliminate assembly gaps and reduce noise.

[0030] In the embodiments of the present invention, technical features that are not described in detail are all existing technologies or conventional technical means and will not be described in detail here.

[0031] Finally, it should be noted that the above embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them, and the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any technician familiar with the technical field can modify the technical solutions recorded in the above embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be covered within the protection scope of the present invention.

Claims

1. A process for assembling a low-noise ultra-high voltage shunt reactor core, the core comprising a core column (3), an upper crossbeam (4), an upper pressure beam (5), a lower pad (6) and an iron yoke of a rectangular frame structure, wherein a pull screw six (27) passes through a frame of the rectangular frame structure, and the method is characterized in that: The following steps are involved: Install a fourth pull screw (17) on the left and right sides of the outer periphery of the iron yoke, install a fifth pull screw (26) on the upper and lower sides of the outer periphery of the iron yoke, install a seventh pull screw (28) at the two corners of the upper end of the inner periphery of the iron yoke near the iron yoke oblique joint (24), and the fourth pull screw (17), the fifth pull screw (26) and the seventh pull screw (28) cooperate with the sixth pull screw (27) to clamp the front and rear ends of the iron yoke, and install a shock-absorbing pad (15) between the fourth pull screw (17), the fifth pull screw (26) and the seventh pull screw (28) and the iron yoke; An insulating pad (22) and a second shock-absorbing pad (23) are installed between the upper cross beam (4), the upper pressure beam (5), the lower pad foot (6) and the iron yoke; An L-shaped insulating rubber plate (13) is installed on the outer side of the iron yoke near the iron yoke oblique joint (24), and an insulating partition plate (14) is installed between the insulating rubber plate (13) and the iron yoke.

2. The low-noise ultra-high voltage shunt reactor core assembly process according to claim 1, characterized in that: The iron yoke comprises a side yoke (16), an upper iron yoke (2) and a lower iron yoke (25); both ends of the pull screw rod (27) pass through the side yoke (16) to connect to the side clamp (29), pass through the upper iron yoke (2) to connect to the upper clamp (1), and pass through the lower iron yoke (25) to connect to the lower clamp (19); the height of the upper iron yoke (2) and the lower iron yoke (25) is greater than the height of the upper clamp (1) and the lower clamp (19); and the width of the side clamp (29) is greater than the width of the side yoke (16).

3. The low-noise UHV shunt reactor core assembly process according to claim 2, characterized in that: A hole is opened on the outer side of the side clamp (29) at a position extending relative to the side yoke (16) to install the pull screw rod four (17), a punching piece one is welded on the outer sides of the upper clamp (1) and the lower clamp (19) to install the pull screw rod five (26), and a punching piece two is welded at the two corners of the upper end of the inner circumference of the iron yoke near the iron yoke bevel joint (24) to install the pull screw rod seven (28).

4. The low-noise UHV shunt reactor core assembly process according to claim 3, characterized in that: The shock-absorbing pad 1 (15) is a long column with a rectangular cross-section. A semicircular groove is provided in the length direction of the shock-absorbing pad 1 (15) to cooperate with the pull screw 4 (17), the pull screw 5 (26) and the pull screw 7 (28). The shock-absorbing pad 1 (15) is made of elastic material.

5. The low-noise UHV shunt reactor core assembly process according to claim 1, characterized in that: An upper crossbeam (4) is arranged above the upper iron yoke (2) at a position corresponding to the iron core column (3), and a lower crossbeam is arranged below the lower iron yoke (25) at a position corresponding to the iron core column (3). A plurality of circular through holes are correspondingly provided on the upper iron yoke (2), the upper crossbeam (4), the lower iron yoke (25), the lower crossbeam and the iron core column (3), and a pull screw rod (7) is installed in the through hole.

6. The low-noise UHV shunt reactor core assembly process according to claim 5, characterized in that: A pull screw disc spring (8) is mounted on the upper end of the pull screw (7). The pull screw disc spring (8) is located between the upper cross beam (4) and the upper iron yoke (2). Steel washers are arranged at both ends of the pull screw disc spring (8).

7. The low-noise UHV shunt reactor core assembly process according to claim 6, characterized in that: An upper pressure beam (5) is respectively installed on the left and right ends of the upper surface of the upper iron yoke (2), an upper side beam (21) is respectively installed on the left and right side surfaces of the upper iron yoke (2), a lower side beam is respectively installed on the left and right side surfaces of the lower iron yoke (25), and a lower pad foot (6) is respectively installed on the left and right ends of the lower surface of the lower iron yoke (25), the lower pad foot (6) corresponds to the position of the upper pressure beam (5), the two ends of the upper pressure beam (5) and the lower pad foot (6) are connected by a tension screw rod three (11), the upper end of the tension screw rod three (11) is covered with a tension screw disc spring three (12), and steel washers are arranged at both ends of the tension screw disc spring three (12), and the ends of the upper clamp (1) and the lower clamp (19) are respectively installed with a tension screw rod two (9) in a vertical direction, the upper end of the tension screw rod two (9) is covered with a tension screw disc spring two (10), and steel washers are arranged at both ends of the tension screw disc spring two (10).

8. The low-noise UHV shunt reactor core assembly process according to claim 7, characterized in that: Binding holes are provided at both ends of the insulating rubber sheet (13), and hooks (20) are welded on the upper pressure beam (5). The horizontal ends of the insulating rubber sheet (13) are bound and fixed to the hooks (20) through the binding holes, and the vertical ends of the insulating rubber sheet (13) are bound and fixed to the four pull screws (17) through the binding holes. An insulating partition (14) is installed on the upper part of the upper side beam (21) and the lower part of the lower side beam, and the cross-section of the insulating partition (14) is L-shaped.

9. The low-noise UHV shunt reactor core assembly process according to claim 8, characterized in that: The insulating rubber sheet (13) is made of insulating cardboard and rubber pads stacked in layers, and the insulating partition (14) is made of laminated wood.

10. The low-noise UHV shunt reactor core assembly process according to any one of claims 1 to 9, characterized in that: A plurality of vertical magnetic isolation slot plates (18) are respectively arranged in parallel on the webs of the upper clamp (1) and the lower clamp (19), the cross-sectional width of the magnetic isolation slot plates (18) being 3 mm, and the height of the magnetic isolation slot plates (18) decreasing in steps from the middle to both sides.

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