Low-noise extra-high voltage shunt reactor

Abstract

The invention belongs to the field of reactors, and relates to a low-noise extra-high voltage shunt reactor which comprises an oil tank, an ascending flanged base and a cooling system, an oil tank composite noise reduction structure is mounted on the inner side of the wall of the oil tank, an oil tank outer noise reduction mechanism is mounted on the outer side of the wall of the oil tank, and a reactor body positioning damping structure is mounted on the lower portion of a reactor body. The iron core is installed in the oil tank, fourth pull screws are installed on the left side and the right side of the periphery of the iron yoke, fifth pull screws are installed on the upper side and the lower side of the periphery of the iron yoke, seventh pull screws are installed at the positions, close to the inclined seam of the iron yoke, of the two corners of the upper end of the inner periphery of the iron yoke, and first shock pads are installed between the fourth pull screws, the fifth pull screws and the seventh pull screws and the iron yoke. Insulating base plates and shock pads II are arranged between the upper cross beam, the upper pressing beam and the lower foot pad and the iron yoke; an insulating rubber plate with an L-shaped structure is arranged on the outer side of the iron yoke close to the inclined seam of the iron yoke; an insulating partition plate is installed between the insulating rubber plate and the iron yoke. The clamping force of the iron yoke is increased, the vibration of the iron core is reduced, the pull screw and the insulating rubber plate are additionally arranged at the inclined seam of the iron yoke, vibration is reduced, and meanwhile noise transmission is blocked.

Description

Technical Field

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

[0002] According to the needs of new power system construction, low-noise operation has become an important requirement for power equipment. As a key component of the power grid, the noise problem caused by UHV shunt reactors has attracted more and more attention. With the widespread application of UHV shunt reactors, the noise phenomenon reported on site has gradually increased. Some shunt reactor cases have high sound pressure levels and complex frequency components, which have a great impact on power station operations. Excessive noise can also cause vibration problems. Long-term vibration may cause microscopic cracks in the material to expand and material failure, which will lead to loosening of bolt preload and connection failure. It can also cause metal debris inside the equipment and affect the insulation capacity of the equipment, which is very harmful.

[0003] The main reason why UHV shunt reactors generate noise is that the iron core vibration inside the oil tank generates noise, and the noise propagates outward through the oil tank. The iron core adopts a special air gap structure design, and the alternating electromagnetic force will force the iron core column to undergo periodic elastic deformation, which will inevitably generate 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.). In addition, the existing reactor oil tank shell structure is simple and cannot effectively block the noise from propagating to the outside. Therefore, in order to fundamentally solve the problem of UHV shunt reactor noise, comprehensive technical improvements are needed in many aspects such as iron core structure, oil tank structure and body installation. Summary of the invention

[0004] The purpose of the present invention is to provide a low-noise UHV reactor design solution that can solve the technical problem of high noise in current UHV reactors. The design solution to achieve the purpose of the present invention is as follows: A low-noise ultra-high voltage shunt reactor comprises an oil tank, an elevated seat connected to the oil tank and a cooling system, an oil tank composite noise reduction structure is installed on the inner side of the oil tank wall, an oil tank outer noise reduction mechanism is installed on the outer side of the oil tank wall, and a body positioning damping structure is installed on the lower part of the body; an iron core is installed in the oil tank, including an iron core column, an upper cross beam, an upper pressure beam, a lower pad and an iron yoke of a rectangular frame structure, a fourth pull screw is installed on the left and right sides of the outer periphery of the iron yoke, a fifth pull screw is installed on the upper and lower sides of the outer periphery of the iron yoke, a seventh pull screw is installed 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 a second pull screw is installed at the lower side of the outer periphery of the iron yoke. Fourth, the pull screw rods five and seven clamp the front and rear ends of the iron yoke, shock-absorbing pads one are installed between the pull screw rods four, five and seven and the iron yoke, insulating pads and shock-absorbing pads two are installed between the upper cross beam, upper pressure beam and lower pad foot and the iron yoke, an L-shaped insulating rubber plate is installed on the outside of the iron yoke near the oblique joint of the iron yoke; an insulating partition is installed between the insulating rubber plate and the iron yoke; the shock-absorbing pad one is a long column with a rectangular cross-section, and a semicircular groove cooperating with the pull screw rods four, five and seven is provided in the length direction of the shock-absorbing pad one, and the shock-absorbing pad one is made of elastic material.

[0005] Preferably, the iron yoke includes a side yoke, an upper iron yoke and a lower iron yoke, and both ends of the pull screw rod six 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, the width of the side clamp is greater than the width of the side yoke, and a hole is opened on the outer side of the side clamp relative to the part extending from the side yoke to install the pull screw rod four, a punching piece one is welded on the outer side of the upper clamp and the lower clamp to install the pull screw rod five, 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 oblique joint of the iron yoke to install the pull screw rod seven.

[0006] 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. A number of circular through holes are provided corresponding to the upper iron yoke, the upper cross beam, the lower iron yoke, the lower cross beam and the iron core column. A pull screw is installed in the through hole, and a pull screw disc spring is mounted on the upper end of the pull screw. The pull screw disc spring 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.

[0007] Preferably, upper pressure beams are installed on the left and right ends of the upper surface of the upper iron yoke, upper side beams are installed on the left and right sides of the upper iron yoke, lower side beams are installed on the left and right sides of the lower iron yoke, and lower pads are installed on the left and right ends of the lower surface of the lower iron yoke, and the lower pads correspond to the position of the upper pressure beam, and the two ends of the upper pressure beam and the lower pads are connected by a pull screw rod three, and the upper end of the pull screw rod three is fitted with a pull screw disc spring three, and steel washers are arranged at both ends of the pull screw disc spring three, and the ends of the upper clamp and the lower clamp are respectively installed with a pull screw rod two in the vertical direction, and the upper end of the pull screw rod two is fitted with a pull screw disc spring two, and steel washers are arranged at both ends of the pull screw disc spring two, and binding holes are opened at both ends of the insulating rubber plate, and hooks are welded on the upper pressure beam, and the horizontal end of the insulating rubber plate is fixed to the hook by binding holes, and the vertical end of the insulating rubber plate is fixed to the pull screw rod four by binding holes, and insulating partitions are installed on the upper part of the upper side beam and the lower part of the lower side beam, and the cross-section of the insulating partition is L-shaped.

[0008] 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.

[0009] Preferably, the fuel tank composite noise reduction structure includes a rubber plate fixedly installed inside the fuel tank wall, the outer side of the rubber plate is in contact with the inner wall surface of the fuel tank wall, the inner side of the rubber plate is fixedly installed with a cardboard without sound-absorbing holes, and the inner side of the cardboard without sound-absorbing holes is fixedly installed with a double-layer composite perforated plate sound absorbing mechanism, gaps are reserved between the rubber plate, the cardboard without sound-absorbing holes and the double-layer composite perforated plate sound absorbing mechanism, and gaps are reserved between the two layers of perforated plates of the double-layer composite perforated plate sound absorbing mechanism.

[0010] Preferably, the double-layer composite perforated plate sound absorption mechanism comprises perforated paperboard 1 and perforated paperboard 2, the perforated paperboard 1 is provided with sound absorption hole 1 with a diameter of 10 mm, and the center spacing between adjacent sound absorption holes 1 is 100 mm, and the perforated paperboard 2 is provided with sound absorption hole 2 with a diameter of 10 mm, and the center spacing between adjacent sound absorption holes 2 is 50 mm.

[0011] Preferably, the fixing nut is welded to the inner wall of the oil tank wall, and a through hole 1 corresponding to the fixing nut is provided on the rubber plate; a cushion block 1 is installed on the inner side of the rubber plate, and a through hole 2 corresponding to the fixing nut is provided at the center of the cushion block 1; a paperboard without sound-absorbing holes is installed on the inner side of the cushion block 1, and a through hole 3 corresponding to the fixing nut is provided on the paperboard without sound-absorbing holes; one end of the insulating screw is screwed into the fixing nut; a cushion block 2 is installed on the inner side of the paperboard without sound-absorbing holes, and a stepped through hole is provided at the center of the cushion block 2, the outer end of the stepped through hole corresponds to the fixing nut, and the inner end of the stepped through hole is provided The end corresponds to the insulating screw; perforated cardboard one is installed on the inner side of pad two, and through hole four corresponding to the insulating screw is provided on the perforated cardboard one; pad three is installed on the inner side of perforated cardboard one, and through hole five corresponding to the insulating screw is provided at the center of pad three; perforated cardboard two is installed on the inner side of pad three, and through hole six corresponding to the insulating screw is provided on the perforated cardboard two; pad four is installed on the inner side of perforated cardboard two, and through hole seven corresponding to the insulating screw is provided at the center of pad four; insulating nut two and insulating nut one are threadedly installed on the other end of the insulating screw.

[0012] Preferably, the noise reduction mechanism on the outside of the fuel tank includes a reinforced iron shell, which includes a closed side panel and an open side arranged opposite to each other, one side of the closed side panel is integrally formed with a blocking side panel around it to form the open side, a quartz sand layer is arranged on the inner side of the closed side panel, and a number of long pressure plates are evenly spaced inside the quartz sand layer, both ends of the long pressure plates are welded to the left and right inner walls of the reinforced iron shell, sound insulation panels and sound-absorbing cotton are arranged on the inner side of the long pressure plates in sequence, and the open side of the reinforced iron shell is welded to the outer surface of the fuel tank wall, and the circumference of the open side is greater than the circumference of the closed side panel.

[0013] Preferably, the body positioning damping structure includes damping structure 1, damping structure 2 and damping structure 3, the damping structure 1 is installed between the lower pad and the bottom of the oil tank, the damping structure 2 is installed between the lower cross beam and the bottom of the oil tank, the damping structure 1 and the damping structure 2 both include cardboard, cork rubber and shock-absorbing rubber pads stacked layer by layer from top to bottom, the damping structure 3 includes shock-absorbing rubber pads, insulating positioning bowls, positioning tubes and positioning pins, the lower end of the positioning tube is welded to the upper surface of the bottom of the oil tank, a shock-absorbing rubber pad is placed at the bottom of the positioning tube, an insulating positioning bowl is placed in the positioning tube above the shock-absorbing rubber pad, the upper end of the positioning pin is welded to the lower surface of the lower clamp, the position of the positioning pin corresponds to the insulating positioning bowl, and the insulating positioning bowl is filled with epoxy resin.

[0014] Beneficial effects of the present invention: 1. In the core structure, the yoke clamping force is increased by adding an iron yoke clamping structure to reduce the vibration of the core; by adding a pull screw and setting an insulating rubber sheet at the oblique joint of the iron yoke, the vibration is reduced and the propagation of noise is blocked; by designing a shock-absorbing pad with grooves, the noise generated by the resonance of the pull screw is further reduced; 2. A composite noise reduction structure composed of a rubber sheet and a multi-layer insulating cardboard is arranged on the inner wall of the oil tank, and the vibration waves transmitted from the insulating oil are blocked and weakened by the combination of materials of different media; 3. An outer noise reduction mechanism including sound-absorbing material and quartz sand is arranged on the outer wall of the oil tank, which plays a composite noise reduction role of sound absorption and sound insulation; a body positioning damping structure is arranged at the lower part of the body to effectively dissipate vibration energy, reduce structural noise by reducing vibration energy transmission.

[0015] The low-noise UHV shunt reactor provided by the present invention can reduce the noise from 75dB(A) to 62.3dB(A), effectively solving the problem of vibration and high noise of UHV reactors, achieving friendly protection of the surrounding environment, and having great significance for supporting the construction of the national UHV power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 This is a front view of the external structure of the low-noise ultra-high voltage shunt reactor according to the first embodiment of the present invention; Figure 2 It is a left view of the external structure of the low-noise ultra-high voltage shunt reactor according to the first embodiment of the present invention; Figure 3 is a front view of the core structure of the first embodiment of the present invention; Figure 4 It is a left side view of the core structure of the first embodiment of the present invention; Figure 5 A top view of the core structure of the first embodiment of the present invention; Figure 6 This is a schematic diagram of assembling the pull screw rod 2 of the first embodiment of the present invention; Figure 7 This is a schematic diagram of the assembly of the pull screw rod 1 of the first embodiment of the present invention; Figure 8 It is a schematic diagram of assembling the insulating pad and the shock absorbing pad of the first embodiment of the present invention; Fig. 9 It is a schematic diagram of assembling a shock-absorbing pad 1 according to the first embodiment of the present invention; Fig.10 It is a structural schematic diagram of a shock-absorbing pad 1 according to Embodiment 1 of the present invention; Fig.11 It is a schematic diagram of assembling the insulating rubber plate and the insulating partition according to the first embodiment of the present invention; Fig.12 This is a schematic structural diagram of an insulating partition according to Embodiment 1 of the present invention; Fig.13 It is a schematic structural diagram of a magnetic isolation slot plate at the web of a clamp according to the first embodiment of the present invention; Fig.14 It is a top view of the composite noise reduction structure of the fuel tank according to the second embodiment of the present invention; Fig.15 yes Fig.14 A partial enlarged view of point B in the middle; Fig.16 is a partial structural schematic diagram of a perforated paperboard 1 of the second embodiment of the present invention; Fig.17 is a partial structural schematic diagram of a perforated paperboard 2 according to the second embodiment of the present invention; Fig.18 It is a front view of the noise reduction mechanism on the outer side of the fuel tank according to the third embodiment of the present invention; Fig.19 It is a horizontal cross-sectional view of the noise reduction mechanism outside the fuel tank according to the third embodiment of the present invention; Fig. 20 It is a schematic diagram of a damping structure 1 at the iron core foot and the bottom of the oil tank according to the fourth embodiment of the present invention; Fig.21 It is a schematic diagram of the damping structure 2 at the lower cross beam and the bottom of the fuel tank of the fourth embodiment of the present invention; Fig. 22 Schematic diagram of the damping structure 3 at the lower part of the lower clamping member according to the fourth embodiment of the present invention; Among them, 1. oil tank, 2. lifting seat, 3. cooling system, 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, 30. upper clamp, 31. upper iron yoke, 3 2. Iron core column, 33. Rubber plate, 34. Cardboard without sound-absorbing holes, 35. Perforated cardboard one, 36. Perforated cardboard two, 37. Spacer one, 38. Spacer two, 39. Spacer three, 40. Spacer four, 41. Insulating nut one, 42. Insulating screw, 43. Fixing nut, 44. Oil tank wall, 45. Insulating nut two, 46. Sound-absorbing hole one, 47. Sound-absorbing hole two, 48. Long pressure plate, 49. Strengthened iron shell, 50. Sound-absorbing cotton, 51. Sound insulation board, 52. Quartz sand layer, 53. Oil tank bottom, 54. Cardboard, 55. Cork rubber, 56. Shock-absorbing rubber pad, 57. Insulating positioning bowl, 58. Epoxy resin, 59. Positioning pin, 60. Lower beam, 61. Positioning tube. DETAILED DESCRIPTION

[0017] 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. Embodiment 1

[0018] In the first embodiment of the present invention, the core structure of the existing UHV shunt reactor is improved.

[0019] like Figure 1-13As shown, it includes an upper clamp 30, an upper iron yoke 31, an iron core column 32, a side clamp 29, a side yoke 16, a lower clamp 19, a lower iron yoke 25, and an iron core assembly, etc. The upper iron yoke 31, the side yoke 16, and the lower iron yoke 25 form an iron yoke of a rectangular frame structure. The upper iron yoke 31, the side yoke 16, and the lower iron yoke 25 are all made of stacked silicon steel sheets. The side clamp 29, the upper clamp 30, and the lower clamp 19 are fixedly installed on the front and rear sides of the side yoke 16, the upper iron yoke 31, and the lower iron yoke 25 by a six-threaded pull screw 27. The six-threaded pull screw 27 passes through the side clamp 29 and the side yoke 16, the upper clamp 30 and the upper iron yoke 31, the lower clamp 19, and the lower iron yoke 25, and then the two ends are fastened by nuts. 27. The side clamp 29, the upper clamp 30 and the lower clamp 19 clamp the upper iron yoke 31, the side yoke 16 and the lower iron yoke 25 front and back to achieve horizontal clamping and fixation of the iron yokes. The height of the upper iron yoke 31 and the lower iron yoke 25 is slightly greater than the height of the upper clamp 30 and the lower clamp 19. A section of the upper iron yoke 31 and the lower iron yoke 25 are exposed at the upper and lower ends of the upper clamp 30 and the lower clamp 19. The width of the side clamp 29 is greater 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 30 and the lower clamp 19, and the pull screws 5 26 are installed on the punching piece 1. The pull screws 5 26 are used to further improve the clamping force of the upper iron yoke 31 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 31 at a position corresponding to the core column 32 , and a lower crossbeam is arranged below the lower iron yoke 25 at a position corresponding to the core column 32 . The upper crossbeam 4 and the lower crossbeam are fixedly connected to the upper clamp 30 and the lower clamp 19 by bolts. A plurality of circular through holes are opened at the positions of the upper iron yoke 31, the upper cross beam 4, the lower iron yoke 25 and the lower cross beam corresponding to the core column 32. A plurality of pull screws 7 pass through the upper cross beam 4, the upper iron yoke 31, the core column 32, the lower iron yoke 25 and the lower cross beam through the circular through holes, so that the upper cross beam 4, the upper iron yoke 31, the core column 32, the lower iron yoke 25 and the lower cross beam are reliably fixed and connected as a whole. The embodiment of the present invention increases the number of pull screws 7 to increase the vertical clamping force of the upper iron yoke 31 and the lower iron yoke 25 on the core column 32. A pull screw disc spring 8 is also set 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 31. Steel washers are set at both ends of the pull screw disc spring 8. 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 31, and the upper side beam 21 is fixedly installed at the left and right sides of the upper iron yoke 31. 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 31 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 at both ends by the pull screw 3 11, and the upper end of the pull screw 3 11 is provided with a pull screw disc spring 3 12, and the two ends of the pull screw disc spring 3 12 are provided with steel washers.

[0024] The end positions of the upper clamp 30 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 32 is composed of core cakes of different heights and air cushion blocks. After the core column 32 is assembled with the upper iron yoke 31 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 32 is subjected to alternating electromagnetic forces, it can still maintain a clamped state. The upper and lower clamping of the upper iron yoke 31 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 333 is fixedly installed at the iron yoke oblique joint 24 near the upper clamp 30 and the lower clamp 19. The insulating rubber sheet 333 is an L-shaped structure. The insulating rubber sheet 333 is made by bending a whole plate. The material of the insulating rubber sheet 333 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 333, and a hook 20 is welded on the side of the upper pressure beam 5. The horizontal end of the insulating rubber sheet 333 is bound and fixed to the hook 20 through the binding hole, and the vertical end of the insulating rubber sheet 333 is bound and fixed to the pull screw 17. In order to prevent the insulating rubber sheet 333 from being cut due to overlapping with the iron yoke bevel joint 24, an insulating partition 14 is fixedly installed on the upper part of the upper side beam 21 and the lower part of the lower side beam. The insulating partition 14 has an L-shaped cross-section, and a groove is provided on the vertical side of the insulating partition 14 and a through hole is provided on the horizontal side. The insulating partition 14 is fixedly installed on the upper side beam 21 and the lower side 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 333 from being worn. By installing such a structure on the four side beams of the iron yoke, the noise transmission at the bevel joint 24 of the iron yoke can be further blocked. The insulating partition 14 is made of laminated wood.

[0028] Both the upper clamp 30 and the lower clamp 19 are equipped with clamp webs. On the sides of the clamp webs of the upper clamp 30 and the lower clamp 19 away from the core column 32, several vertical magnetic isolation slot plates 18 are respectively 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 30 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. Embodiment 2

[0030] The second embodiment of the present invention improves the inner wall of the oil tank of the existing UHV shunt reactor on the basis of the first embodiment.

[0031] like Fig.14 , 15 As shown, a composite noise reduction structure for an oil tank used in an ultra-high voltage shunt reactor is divided into two parts, which are symmetrically fixedly installed on the inner side walls of the oil tank wall 44 on both sides of the core side yoke, and the oil tank composite noise reduction structure is not installed at the positions of the oil tank wall 44 corresponding to the cooling side and the outlet side. The composite noise reduction structure for the oil tank is a composite structure composed of a rubber sheet 33 and a multi-layer paperboard, and a gap is left between each two adjacent layers of boards, specifically including: a rubber sheet 33, a paperboard without sound-absorbing holes 34, and perforated paperboards 1 35 and 36. The rubber sheet 33, the paperboard without sound-absorbing holes 34, and the perforated paperboards 1 35 and 36 are fixedly installed by fixing nuts 43, insulating screws 42, insulating nuts 1 41 and insulating nuts 2 45. The fixing nuts 43 are welded to the inner side wall surface of the oil tank wall 44. The position and number of the fixing nuts 43 are preferably such that the composite noise reduction structure for the oil tank can be reliably fixed and installed. The fixing nuts 43 are preferably made of stainless steel. One end of the insulating screw rod 42 is screwed into the fixing nut 43 , and the insulating screw rod 42 is an M20 high-strength glass fiber screw rod.

[0032] The rubber sheet 33 is made of a 10 mm thick special rubber pad for shock absorption and noise reduction. A through hole one corresponding to the fixing nut 43 is provided on the rubber sheet 33. The rubber sheet 33 is mounted on the outer periphery of the fixing nut 43 through the through hole one, and the outer side surface of the rubber sheet 33 is arranged in close contact with the inner wall surface of the tank wall 44.

[0033] A cushion block 37 is fixedly installed on the inner side of the rubber sheet 33. A through hole 2 corresponding to the fixing nut 43 is provided at the center of the cushion block 37. The cushion block 37 is sleeved on the outer periphery of the fixing nut 43 through the through hole 2. The thickness of the cushion block 37 is 10 mm, so as to leave a gap of 10 mm between the rubber sheet 33 and the paperboard 34 without sound-absorbing holes to prevent the rubber sheet 33 from directly contacting the paperboard 34 without sound-absorbing holes, so as to reduce noise.

[0034] The inner side of the pad 1 37 is fixedly installed with a paperboard 34 without sound-absorbing holes. The paperboard 34 without sound-absorbing holes is an insulating paperboard with a thickness of 3 mm. A through hole 3 corresponding to the fixing nut 43 is provided on the paperboard 34 without sound-absorbing holes. The paperboard 34 without sound-absorbing holes is fitted on the outer periphery of the fixing nut 43 through the through hole 3.

[0035] The inner side surface of the paperboard 34 without sound-absorbing holes is fixedly installed with a cushion block 38, the thickness of the cushion block 38 is 25 mm, and a stepped through hole is provided at the center of the cushion block 38, the outer end of the stepped through hole corresponds to the fixing nut 43, and the inner end of the stepped through hole corresponds to the insulating screw 42, the fixing nut 43 and the insulating screw 42 respectively pass through the two ends of the stepped through hole of the cushion block 38, and the insulating screw 42 and the fixing nut 43 cooperate to prevent the cushion block 38 from falling.

[0036] The inner side of the pad block 2 38 is fixed with a perforated cardboard 35, which is a 2 mm thick insulating cardboard. The perforated cardboard 35 is provided with a through hole 4 corresponding to the insulating screw 42, and the insulating screw 42 passes through the through hole 4 to fix the perforated cardboard 35. In addition, the perforated cardboard 35 is regularly drilled with a φ10 mm sound-absorbing hole 46 at other positions, and the center spacing between adjacent sound-absorbing holes 46 is 100 mm. Fig.16 shown.

[0037] A pad block 39 is fixedly installed on the inner side of the perforated cardboard 1 35 . The thickness of the pad block 39 is 25 mm. A through hole 5 corresponding to the insulating screw 42 is provided at the center of the pad block 39 . The pad block 39 is mounted on the outer periphery of the insulating screw 42 through the through hole 5 .

[0038] The inner side of the pad 39 is fixed with 36, which is a 2mm thick insulating paperboard. A through hole 6 corresponding to the insulating screw 42 is provided on 36, and the insulating screw 42 passes through the through hole 6 to fix 36. In addition, φ10mm sound-absorbing holes 47 are drilled in the remaining positions of 36 according to the rules, and the center spacing of adjacent sound-absorbing holes 47 is 50mm. Fig.17 36 and perforated paperboard 35 constitute a double-layer composite perforated board sound absorbing mechanism.

[0039] The inner side of 36 is fixedly mounted with a spacer block 40, the thickness of which is 8 mm, and a through hole 7 corresponding to the insulating screw 42 is provided at the center of the spacer block 40, and the spacer block 40 is sleeved on the outer periphery of the insulating screw 42 through the through hole 7. By providing the spacer block 40, the force bearing area of ​​36 can be increased, so that the tightening force of the insulating nut 2 45 is more evenly distributed on 36.

[0040] The insulating nut 2 45 and the insulating nut 1 41 are threadedly installed on the other end of the insulating screw 42, and the insulating nut 2 45 is adjacent to 36. The insulating nut 2 45 and the insulating nut 1 41 adopt M20 high-strength glass fiber nuts. The double nut structure of the insulating nut 2 45 and the insulating nut 1 41 can effectively prevent loosening.

[0041] Special rubber pads for shock absorption and noise reduction, among which the representative product is the NP rubber specially developed and named by Shenma Company. NP rubber is used to distinguish it from other types of rubber, and the type of NP rubber is NP70. NP rubber has good compression and rebound characteristics, which can reduce the vibration transmission of the internal structure of the fuel tank. At the same time, it has a high loss factor and can convert mechanical energy into heat energy, and can be used as a damping material. In the embodiment of the present invention, a layer of rubber sheet 33 made of NP rubber material is arranged on the inner side of the fuel tank wall 44, which can effectively reduce the vibration transmission between the reactor body and the fuel tank and reduce the structural noise of the fuel tank.

[0042] The insulating paperboard is designed as a single-layer non-sound-absorbing hole paperboard 34 plus a double-layer composite perforated plate sound absorption mechanism. Many small holes are drilled on the perforated paperboards 35 and 36 according to a certain arrangement rule, and a certain thickness of gap is left behind the board. When the sound wave is incident, the transformer oil in the gap will make reciprocating motion. Due to the friction damping with the hole wall, part of the sound energy is converted into heat energy and lost, thereby achieving the purpose of noise reduction. The use of a double-layer composite perforated plate sound absorption mechanism with different perforation rates can improve the sound absorption coefficient, effectively widen the sound absorption frequency band, and improve the noise reduction performance of the perforated plate resonance sound absorption structure. According to relevant research, the main vibration frequency of a 50Hz reactor is 100Hz. When the perforation rate of the double-layer composite perforated plate sound absorption mechanism is in the range of 1%-10%, the plate thickness is 2-13mm, and the gap thickness is 6-100mm, the resonance frequency is 100-400Hz, which coincides with the main vibration frequency of the reactor and can be used for the resonance sound absorption of the reactor noise. The present invention adopts a single-layer sound-absorbing hole-free paperboard 34 plus a double-layer composite perforated plate sound absorption mechanism. The three layers of paperboard are: a 3mm thick sound-absorbing hole-free paperboard 34, a 2mm thick perforated paperboard 35 (with a perforation rate of about 1%), and a 2mm thick 36 (with a perforation rate of about 3%, a hole diameter of 36 is 10mm (radius is 5mm), a hole center spacing is 50mm, and a perforation rate is π×5×5 / (50×50)=3.14%, which is about 3%), and the paperboard gap is 25mm.

[0043] The composite noise reduction structure of the oil tank is arranged on the inner side of the box wall on the two side yokes, and extends to the inner side of the box wall on the high-voltage side and the cooling side through bending. The box wall at this location is closest to the iron core and is the main channel for the noise of the reactor to be transmitted outward. The arrangement of the composite noise reduction structure of the oil tank can achieve a significant noise reduction effect. Furthermore, the rubber sheet 33, the cardboard without sound-absorbing holes 34, and the perforated cardboards 35 and 36 are all bent as a whole plate. The horizontal cross-sections of the rubber sheet 33, the cardboard without sound-absorbing holes 34, and the perforated cardboards 35 and 36 after bending are all U-shaped. The integrated U-shaped structure not only ensures the noise reduction effect, but also makes assembly more convenient. The entire set of noise reduction structure is fixed with high-strength glass fiber screws and nuts, without glue bonding, which is convenient for installation and disassembly, safe and environmentally friendly. Embodiment 3

[0044] The third embodiment of the present invention improves the outer wall of the oil tank of the existing UHV shunt reactor on the basis of the first embodiment.

[0045] like Fig.18 , 19As shown, a noise reduction mechanism for the outer side of an oil tank of a UHV shunt reactor includes a reinforced iron shell 49, the reinforced iron shell 49 includes a closed side plate away from the oil tank wall 44 and arranged in parallel with the oil tank wall 44, a circle of blocking side plates are integrally formed around one side of the closed side plate close to the oil tank wall 44, the end of the blocking side plate close to the oil tank wall 44 is an open side, the perimeter of the open side is greater than the perimeter of the closed side plate, the open side surface of the reinforced iron shell 49 is fixedly welded to the outer surface position of the oil tank wall 44 of the UHV reactor oil tank, and the structure of the reinforced iron shell 49 with a small outside and a large inside can make the welding more firm. The middle section of the reinforced iron shell 49 in the front view direction is a boat-shaped structure, and the middle section of the reinforced iron shell 49 in the top view direction is a U-shaped structure. The reinforced iron shell 49 adopts a high-strength, corrosion-resistant low-alloy steel plate to ensure the durability and stability of the oil tank noise reduction mechanism.

[0046] Several horizontal long pressing plates 48 are welded and installed on the left and right inner walls of the reinforced iron shell 49 at a certain vertical spacing. Figure 1 The long pressing plate 48 in the figure is a perspective effect and is located inside the reinforced iron shell 49. The long pressing plate 48 is made of low alloy steel plate. The two ends of the long pressing plate 48 are firmly welded to the left and right inner walls of the reinforced iron shell 49. A layer of dry quartz sand layer 52 is first set inside the closed side plate of the reinforced iron shell 49. The quartz sand layer 52 serves as the outermost layer to block noise. Several long pressing plates 48 are combined together to preliminarily fix the quartz sand layer 52. Sound insulation board 51 and sound absorbing cotton 50 are sequentially set inside the long pressing plate 48. The sound absorbing cotton 50 is adjacent to the tank wall 44. The sound insulation board 51 and the sound absorbing cotton 50 can tightly fill the internal space of the reinforced iron shell 49 and further fix the quartz sand layer 52. At the same time, the combination of these two materials can have the dual performance of sound absorption and sound insulation to achieve the best technical effect of sound absorption and sound insulation.

[0047] The processing method of the fuel tank outer side noise reduction mechanism provided in the third embodiment of the present invention is as follows: The closed side plate of the reinforced iron shell 49 is placed horizontally on the ground, and a layer of dry quartz sand 52 is laid on the closed side plate. Next, a number of long pressing plates 48 are welded on the left and right inner walls of the reinforced iron shell 49. The length of the long pressing plates 48 matches the spacing between the left and right inner walls of the reinforced iron shell 49. The long pressing plates 48 are evenly arranged at a certain distance. The long pressing plates 48 form a stable filling frame, and the quartz sand layer 52 is initially fixed. The sound insulation board 51 and the sound absorbing cotton 50 are placed in sequence on the long pressing plates 48 to ensure that the sound insulation board 51 and the sound absorbing cotton 50 can tightly fill the internal space of the reinforced iron shell 49, and ensure that the filling is full and has no gaps, so as to achieve the best sound absorption and sound insulation effect. Finally, the reinforced iron shell 49 is welded as a whole to the outer side of the oil tank wall 44, and the closed side panel is arranged parallel to the oil tank wall 44. The noise reduction mechanism can be distributed around the outer side of the oil tank wall 44 according to actual needs, thereby constructing a stable and efficient noise protection barrier, which effectively blocks the noise generated during the operation of the reactor. Embodiment 4

[0048] Embodiment 4 of the present invention improves the body positioning of the existing UHV shunt reactor on the basis of embodiment 1.

[0049] like Figure 20-22 As shown, the body positioning damping structure of the UHV shunt reactor includes: damping structure one, damping structure two and damping structure three.

[0050] The damping structure 1 is fixedly installed between the lower pad 6 and the bottom 53 of the fuel tank, and the damping structure 2 is fixedly installed between the lower cross beam 60 and the bottom 53 of the fuel tank. The damping structure 1 is the same as the damping structure 2, and both include cardboard 54, cork rubber 55 and shock-absorbing rubber pads 56 stacked layer by layer from top to bottom.

[0051] In the fourth embodiment of the present invention, the shock-absorbing rubber pad 56 can be made of NP rubber specially developed and named by Shenma Company. In the fourth embodiment of the present invention, the cardboard 54, the cork rubber 55 and the shock-absorbing rubber pad 56 are arranged between the lower pad 6 and the bottom 53 of the oil tank, and between the lower cross beam 60 and the bottom 53 of the oil tank. The damping structure can effectively dissipate mechanical energy, effectively reduce the vibration transmission between the lower pad 6 and the lower cross beam 60 and the oil tank, and reduce the structural noise of the oil tank.

[0052] The lower clamp 19 is one of the components of the body. The lower clamp 19 is used to fasten the lower iron yoke. The damping structure 3 is fixedly installed at the lower part of both ends of the lower clamp 19. The damping structure 3 adopts a cast-type positioning damping structure, including a shock-absorbing rubber pad 56, an insulating positioning bowl 57, a positioning tube 61 and a positioning pin 59. The diameter of the positioning tube 61 is larger than the insulating positioning bowl 57. The lower end of the positioning tube 61 is fixedly connected to the upper surface of the oil tank bottom 53 by welding. The shock-absorbing rubber pad 56 is placed at the bottom of the positioning tube 61. The shock-absorbing rubber pad 56 is adjacent to the oil tank bottom 53. The insulating positioning bowl 57 is placed in the positioning tube 61 above the shock-absorbing rubber pad 56. The positioning pin 59 is fixedly connected to the lower surface of the lower clamp 19 by welding. The position of the positioning pin 59 corresponds to the insulating positioning bowl 57. The insulating positioning bowl 57 is filled with quick-drying epoxy resin 58. After the epoxy resin 58 solidifies, it is used to connect and fix the positioning pin 59. The shock-absorbing rubber pad 56 can reduce the vibration transmission of the internal structure of the oil tank. After the reactor body is in place, the epoxy resin 58 can ensure that the connection between the reactor body and the oil tank is tight and firm, avoiding the loosening of the reactor body due to the vibration of the reactor itself.

[0053] 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.

[0054] 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 low-noise ultra-high voltage shunt reactor, comprising an oil tank (1), a raised seat (2) and a cooling system (3) connected to the oil tank (1), characterized in that: A composite oil tank noise reduction structure is installed on the inner side of the oil tank wall (44), an outer oil tank noise reduction mechanism is installed on the outer side of the oil tank wall (44), and a body positioning damping structure is installed on the lower part of the body; an iron core is installed in the oil tank (1), including an iron core column (32), an upper cross beam (4), an upper pressure beam (5), a lower pad (6) and an iron yoke of a rectangular frame structure, a fourth pull screw (17) is installed on the left and right sides of the outer periphery of the iron yoke, a fifth pull screw (26) is installed on the upper and lower sides of the outer periphery of the iron yoke, and a seventh pull screw (28) is installed at the two corners of the upper end of the inner periphery of the iron yoke near the iron yoke oblique joint (24), the fourth pull screw (17), the fifth pull screw (26) and the seventh pull screw (28) clamp the front and rear ends of the iron yoke, and the fourth pull screw (17) ), a shock-absorbing pad one (15) is installed between the pull screw rod five (26) and the pull screw rod seven (28) and the iron yoke; an insulating pad plate (22) and a shock-absorbing pad two (23) are installed between the upper cross beam (4), the upper pressure beam (5) and 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); an insulating partition plate (14) is installed between the insulating rubber plate (13) and the iron yoke; the shock-absorbing pad one (15) is a long column with a rectangular cross section; a semicircular groove matching with the pull screw rod four (17), the pull screw rod five (26) and the pull screw rod seven (28) is provided in the length direction of the shock-absorbing pad one (15); the shock-absorbing pad one (15) is made of elastic material.

2. A low-noise ultra-high voltage shunt reactor according to claim 1, characterized in that: The iron yoke comprises a side yoke (16), an upper iron yoke (31) and a lower iron yoke (25); both ends of the pull screw rod 6 (27) pass through the side yoke (16) to connect to the side clamp (29), pass through the upper iron yoke (31) to connect to the upper clamp (30), and pass through the lower iron yoke (25) to connect to the lower clamp (19); the height of the upper iron yoke (31) and the lower iron yoke (25) is greater than the height of the upper clamp (30) and the lower clamp (19); the width of the side clamp (29) is greater than the width of the side yoke (16); a hole is opened on the outer side of the side clamp (29) extending from the side yoke (16) to install the pull screw rod 4 (17); the outer sides of the upper clamp (30) and the lower clamp (19) are welded with a punching piece 1 to install the pull screw rod 5 (26); and the punching piece 2 is welded at the two corners of the upper inner circumference of the iron yoke near the iron yoke oblique joint (24) to install the pull screw rod 7 (28).

3. A low-noise ultra-high voltage shunt reactor according to claim 2, characterized in that: An upper crossbeam (4) is arranged above the upper iron yoke (31) at a position corresponding to the iron core column (32), and a lower crossbeam is arranged below the lower iron yoke (25) at a position corresponding to the iron core column (32). A plurality of circular through holes are correspondingly provided in the upper iron yoke (31), the upper crossbeam (4), the lower iron yoke (25), the lower crossbeam and the iron core column (32). A pull screw rod (7) is installed in the through hole. A pull screw rod disc spring (8) is mounted on the upper end of the pull screw rod (7). The pull screw rod disc spring (8) is located between the upper crossbeam (4) and the upper iron yoke (31), and steel washers are arranged at both ends of the pull screw rod disc spring (8).

4. A low-noise ultra-high voltage shunt reactor according to claim 3, characterized in that: The upper pressure beam (5) is respectively installed at the left and right ends of the upper surface of the upper iron yoke (31), the upper side beam (21) is respectively installed at the left and right sides of the upper iron yoke (31), the lower side beam is respectively installed at the left and right sides of the lower iron yoke (25), and the lower pads (6) are respectively installed at the left and right ends of the lower surface of the lower iron yoke (25), and the lower pads (6) correspond to the position of the upper pressure beam (5). The two ends of the upper pressure beam (5) and the lower pads (6) are connected by a pull screw rod three (11), and the upper end of the pull screw rod three (11) is covered with a pull screw disc spring three (12), and steel washers are arranged at the two ends of the pull screw disc spring three (12), and the ends of the upper clamp (30) and the lower clamp (19) are connected. Two pull screws (9) are installed in the vertical direction respectively, and the upper end of the two pull screws (9) is covered with two pull screw disc springs (10), and steel washers are arranged at both ends of the two pull screw disc springs (10). Binding holes are opened at the two ends of the insulating rubber plate (13), and a hook (20) is welded on the upper pressure beam (5). The horizontal end of the insulating rubber plate (13) is fixedly bound with the hook (20) through the binding hole, and the vertical end of the insulating rubber plate (13) is fixedly bound with the four pull screws (17) through the binding hole. The upper part of the upper side beam (21) and the lower part of the lower side beam are installed with an insulating partition (14), and the cross-section of the insulating partition (14) is L-shaped.

5. A low-noise ultra-high voltage shunt reactor according to any one of claims 1 to 4, characterized in that: A plurality of vertical magnetic isolation slot plates (18) are respectively arranged in parallel on the webs of the upper clamp (30) 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 a step-like manner from the middle to both sides.

6. A low-noise ultra-high voltage shunt reactor according to claim 1, characterized in that: The fuel tank composite noise reduction structure comprises a rubber plate (33) fixedly mounted inside a fuel tank wall (44), the outer side of the rubber plate (33) being in contact with the inner wall surface of the fuel tank wall (44), a paperboard without sound-absorbing holes (34) being fixedly mounted inside the rubber plate (33), and a double-layer composite perforated plate sound absorbing mechanism being fixedly mounted inside the paperboard without sound-absorbing holes (34), gaps being reserved between the rubber plate (33), the paperboard without sound-absorbing holes (34) and the double-layer composite perforated plate sound absorbing mechanism, and gaps being reserved between the two layers of perforated plates of the double-layer composite perforated plate sound absorbing mechanism.

7. A low-noise ultra-high voltage shunt reactor according to claim 6, characterized in that: The double-layer composite perforated plate sound absorption mechanism comprises a perforated paperboard (35) and a perforated paperboard (36), wherein the perforated paperboard (35) is provided with a sound absorption hole (46) with a diameter of 10 mm, and the hole center spacing between adjacent sound absorption holes (46) is 100 mm, and the perforated paperboard (36) is provided with a sound absorption hole (47) with a diameter of 10 mm, and the hole center spacing between adjacent sound absorption holes (47) is 50 mm.

8. A low-noise ultra-high voltage shunt reactor according to claim 7, characterized in that: The fixing nut (43) is welded to the inner wall of the oil tank wall (44); a through hole 1 corresponding to the fixing nut (43) is formed on the rubber plate (33); a cushion block 1 (37) is installed on the inner side of the rubber plate (33); a through hole 2 corresponding to the fixing nut (43) is formed at the center of the cushion block 1 (37); a paperboard (34) without sound-absorbing holes is installed on the inner side of the cushion block 1 (37); a through hole 3 corresponding to the fixing nut (43) is formed on the paperboard (34) without sound-absorbing holes; one end of the insulating screw (42) is screwed into the fixing nut (43); a cushion block 2 (38) is installed on the inner side of the paperboard (34) without sound-absorbing holes; a stepped through hole is formed at the center of the cushion block 2 (38); the outer end of the stepped through hole corresponds to the fixing nut (43), and the inner end of the stepped through hole is aligned with the insulating screw. (42); a perforated cardboard (35) is installed on the inner side of the second pad (38), and a through hole (4) corresponding to the insulating screw (42) is provided on the perforated cardboard (35); a pad (39) is installed on the inner side of the perforated cardboard (35), and a through hole (5) corresponding to the insulating screw (42) is provided at the center of the pad (39); a perforated cardboard (36) is installed on the inner side of the pad (39), and a through hole (6) corresponding to the insulating screw (42) is provided on the perforated cardboard (36); a pad (40) is installed on the inner side of the perforated cardboard (36), and a through hole (7) corresponding to the insulating screw (42) is provided at the center of the pad (40); and the insulating nut (45) and the insulating nut (41) are threadedly installed on the other end of the insulating screw (42).

9. The low-noise ultra-high voltage shunt reactor according to claim 1, characterized in that: The oil tank outer noise reduction mechanism comprises a reinforced iron shell (49), the reinforced iron shell (49) comprises a closed side plate and an open side arranged opposite to each other, a surrounding side plate is integrally formed around one side of the closed side plate to form the open side, a quartz sand layer (52) is arranged inside the closed side plate, a plurality of long pressing plates (48) are arranged evenly spaced inside the quartz sand layer (52), two ends of the long pressing plates (48) are welded to the left and right inner walls of the reinforced iron shell (49), a sound insulation plate (51) and a sound absorbing cotton (50) are arranged in sequence inside the long pressing plates (48), the open side of the reinforced iron shell (49) is welded to the outer surface of the oil tank wall (44), and the perimeter of the open side is greater than the perimeter of the closed side plate.

10. The low-noise ultra-high voltage shunt reactor according to claim 1, characterized in that: The body positioning damping structure comprises a damping structure 1, a damping structure 2 and a damping structure 3. The damping structure 1 is installed between the lower pad (6) and the bottom (53) of the oil tank. The damping structure 2 is installed between the lower cross beam (60) and the bottom (53) of the oil tank. The damping structure 1 and the damping structure 2 both comprise cardboard (54), cork rubber (55) and shock-absorbing rubber pads (56) stacked layer by layer from top to bottom. The damping structure 3 comprises a shock-absorbing rubber pad (56), an insulating positioning bowl (57 ), a positioning tube (61) and a positioning pin (59), the lower end of the positioning tube (61) is welded to the upper surface of the oil tank bottom (53), a shock-absorbing rubber pad (56) is placed at the bottom of the positioning tube (61), an insulating positioning bowl (57) is placed in the positioning tube (61) above the shock-absorbing rubber pad (56), the upper end of the positioning pin (59) is welded to the lower surface of the lower clamp (19), the position of the positioning pin (59) corresponds to the insulating positioning bowl (57), and the insulating positioning bowl (57) is filled with epoxy resin (58).

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