CN117711761B - Low-noise iron core reactor - Google Patents
Low-noise iron core reactor Download PDFInfo
- Publication number
- CN117711761B CN117711761B CN202410133093.9A CN202410133093A CN117711761B CN 117711761 B CN117711761 B CN 117711761B CN 202410133093 A CN202410133093 A CN 202410133093A CN 117711761 B CN117711761 B CN 117711761B
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- fixedly connected
- clamping
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- sliding
- iron core
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 95
- 229910052742 iron Inorganic materials 0.000 claims abstract description 31
- 210000001503 joint Anatomy 0.000 claims abstract description 25
- 238000010030 laminating Methods 0.000 claims description 2
- 238000003032 molecular docking Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a low-noise iron core reactor, which relates to the technical field of reactors and comprises an iron core column, wherein an upper iron yoke is arranged at the top end of the iron core column, first clamping plates are attached to the horizontal positions of the two sides of the upper iron yoke, a lower iron yoke is arranged at the bottom end of the iron core column, second clamping plates are fixedly connected to the horizontal positions of the two sides of the lower iron yoke, mounting holes are formed in the second clamping plates, ribs are fixedly connected to the outer sides of the first clamping plates and the outer sides of the second clamping plates, a butt joint seat is fixedly connected to the outer sides of the second clamping plates, a screw rod is movably inserted into the butt joint seat, and the top end of the screw rod is inserted into the first clamping plates. The clamping device is reasonable in structure, the butt joint columns pull the distance between the second clamping plates through rotation of the rotating plates, so that the lower iron yoke can be fastened conveniently, the clamping pieces can be fastened and fixed conveniently through rotation of the main shaft, and the first clamping plates and the second clamping plates are prevented from loosening.
Description
Technical Field
The invention relates to the technical field of reactors, in particular to a low-noise iron core reactor.
Background
The reactor is an indispensable device in the reactive power compensation device, is widely applied to urban power grids at present, and the dry type iron core reactor occupies a large part in the iron core reactor demands due to the characteristics of no maintenance, no oil leakage and the like. Because the iron core of the iron core reactor is not an integral body, wherein the iron core column is formed by stacking a plurality of iron core cakes and air gap plates, the upper iron yoke and the lower iron yoke are respectively independent, and the structure ensures that the electromagnetic flux is easy to generate larger noise when the reactor runs in an electrified way and encounters an air gap.
The utility model relates to a low-noise dry-type iron core reactor iron core tensioning structure, which comprises a pressing beam, clamping pieces, tensioning screws and auxiliary screws, wherein the clamping pieces are fixedly arranged on the same level of two long side surfaces of an upper iron yoke and a lower iron yoke, a plurality of transverse pressing beams are arranged between the clamping pieces on the same level, two ends of the pressing beams are connected with the clamping pieces through bolts, the upper and lower positions of the pressing beams on the upper iron yoke and the lower iron yoke are in one-to-one correspondence, the tensioning screws are arranged between the upper and lower corresponding pressing beams, and two ends of the tensioning screws are in threaded connection with the end parts of the upper and lower corresponding pressing beams. The pressing beam, the clamping piece and the auxiliary screw rod form an integral frame for wrapping the upper iron yoke and the lower iron yoke, and the integral tensioning frame is stable in structure; the tensioning screw rod is tensioned up and down, the strength and stability of each component of the iron core can be guaranteed, the tensioning force of the upper tensioning screw rod and the lower tensioning screw rod is integrally and uniformly transmitted to the iron yoke and the iron core column of the reactor, so that vibration among each component of the iron core is reduced after the reactor is electrified and operated, the noise of the reactor can be effectively reduced, the upper iron yoke and the lower iron yoke are tensioned and fixed in the mode of the screw rod and the nut in the above patent, but the long-time vibration among each component of the iron core causes the loosening phenomenon of the nut due to long-time operation of the reactor.
Disclosure of Invention
The application aims to provide a low-noise iron core reactor, which realizes that a butt joint column pulls the interval between second clamping plates through rotating a rotating plate, so that the fastening action of a lower iron yoke is facilitated, the tensioning and fixing of a clamping piece between first clamping plates are facilitated through rotating a main shaft, and the loosening phenomenon of the first clamping plates and the second clamping plates is avoided.
In order to achieve the above purpose, the present application provides the following technical solutions: the utility model provides a low noise's iron core reactor, includes the iron core post, the iron core post top is provided with the upper yoke, upper yoke both sides horizontal position laminating has first splint, the bottom of iron core post is provided with down the yoke, the both sides horizontal position fixedly connected with second splint of lower yoke, set up the mounting hole on the second splint, the outside of first splint and second splint all fixedly connected with rib, the outside fixedly connected with butt joint seat of second splint, the activity is inserted on the butt joint seat has the screw rod, the top of screw rod is inserted and is established on the first splint, the top threaded connection of screw rod has the nut; still include fastening assembly, clamping assembly and spacing subassembly, fastening assembly is including installing cooperate between first splint and the second splint, clamping assembly installs the top of first splint is used, spacing subassembly is installed cooperate the use on the clamping assembly.
Preferably, the fastening assembly comprises a butt joint column movably inserted on the second clamping plate, one end of the butt joint column is fixedly connected with a wafer, the other end of the butt joint column is provided with external threads, one end of the butt joint column is in threaded connection with a lantern ring, and a rotating plate is fixedly connected on the lantern ring.
Preferably, the outside fixedly connected with supporting seat of first splint, the supporting seat is provided with two sets of, movable the inserting between the supporting seat is equipped with the balancing pole.
Preferably, the clamping assembly comprises a fixed frame arranged at the top of the first clamping plate, a pair of limiting rods are fixedly connected to the inside of the fixed frame, a pair of sleeves are slidably connected to the limiting rods, and a pair of blocking sheets are fixedly connected to opposite ends of the sleeves.
Preferably, the limiting rod is sleeved with a first spring, and two ends of the first spring are fixedly connected with one opposite side of the pair of baffle plates respectively.
Preferably, the clamping piece is fixedly connected with the other end of the sleeve, a round hole is formed in the bottom end of the clamping piece, a limit column is movably inserted in the round hole, and the limit column is fixedly connected to the first clamping plate.
Preferably, the sleeve is fixedly connected with a fixed column, the fixed column is fixedly connected with a top plate, and the middle part of the top surface of the top plate is fixedly connected with a sliding shaft.
Preferably, the limiting assembly comprises a pair of supporting plates fixedly connected to the top surface of the fixed frame, an adjusting plate is fixedly connected between the top ends of the pair of supporting plates, and a main shaft is rotatably connected to the middle of the adjusting plate.
Preferably, the bottom fixedly connected with carousel of main shaft, the spout has been seted up on the carousel, the inside sliding connection of spout has the slide shaft, the top fixedly connected with spiral shell head of main shaft, fixedly connected with fluted disc on the main shaft.
Preferably, a pair of fixing seats are fixedly mounted on the adjusting plate, a pair of sliding rods are fixedly connected to the fixing seats, sliding seats are movably sleeved on the sliding rods, the sliding seats are fixedly connected to the moving block, clamping teeth are fixedly connected to the moving block, the clamping teeth are clamped on the fluted disc, a second spring is sleeved on the sliding rods, a supporting plate is fixedly connected to the moving block, and a pull rod is fixedly connected to the supporting plate.
In summary, the invention has the following beneficial effects:
The invention has reasonable structure, when the interval between the second clamping plates is required to be adjusted to clamp and fix the lower iron yoke, the wrench is used for rotating the rotating plate, the two ends of the rotating plate are fixedly connected with the lantern rings, the lantern rings are driven to rotate by the rotation of the rotating plate and are in threaded connection with the butt joint columns, and the butt joint columns pull the second clamping plates to move by the rotation of the lantern rings, so that the clamping and fixing of the two sides of the lower iron yoke are facilitated;
According to the invention, a hexagonal wrench is used for rotating a screw head, the rotation of the screw head drives a main shaft to rotate, a turntable is fixedly connected to the bottom end of the main shaft, the turntable is driven to rotate through the rotation of the main shaft, a chute is formed in the turntable, a sliding shaft is connected in the chute in a sliding manner, the sliding shaft slides in the chute through the rotation of the turntable, so that a top plate can conveniently drive a sleeve to slide on a limiting rod, and clamping pieces can clamp and fix two sides of a first clamping plate;
3. According to the invention, when the screw head is rotated, the pull rod is pulled, the pull rod is fixedly connected to the supporting plate, the supporting plate is fixedly connected to the moving block, the moving block is moved by pulling of the pull rod, the sliding seats are fixedly connected to the two sides of the moving block and are slidably connected to the sliding rod, the sliding seats slide on the sliding rod by moving of the moving block, the moving stability of the moving block is improved, and the clamping teeth are separated from the fluted disc by moving of the moving block, so that the screw head can be rotated conveniently.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a three-dimensional structure of a reactor;
fig. 2 is a schematic diagram showing a bottom perspective structure of the reactor;
Fig. 3 is a schematic diagram of a rear perspective structure of the reactor;
FIG. 4 is a schematic perspective view of a second clamping plate;
FIG. 5 is a schematic view of a combined three-dimensional structure of a limiting assembly and a supporting plate;
FIG. 6 is a schematic view showing a first perspective view of a combination of a fixing frame and a support plate;
FIG. 7 is a schematic perspective view of a fixed frame;
Fig. 8 is a schematic view of a combined three-dimensional structure of the fixing base and the supporting plate.
In the figure: 1. an iron core column; 101. an upper yoke; 102. a first clamping plate; 103. a lower yoke; 104. a second clamping plate; 105. a mounting hole; 106. ribs; 107. a butt joint seat; 108. a screw; 2. butt-joint columns; 201. a wafer; 202. a collar; 203. a rotating plate; 204. a support base; 205. a balance bar; 3. a fixed frame; 301. a limit rod; 302. a sleeve; 303. a baffle; 304. a first spring; 305. a clamping piece; 306. a round hole; 307. a limit column; 308. fixing the column; 309. a top plate; 310. a slide shaft; 4. a support plate; 401. an adjusting plate; 402. a main shaft; 403. a turntable; 404. a chute; 405. a screw head; 406. fluted disc; 5. a fixing seat; 501. a slide bar; 502. a slide; 503. a moving block; 504. latch teeth; 505. a second spring; 506. a supporting plate; 507. and (5) a pull rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples: referring to fig. 1-8, the low-noise iron core reactor comprises an iron core column 1, wherein an upper iron yoke 101 is arranged at the top end of the iron core column 1, a first clamping plate 102 is attached to the horizontal positions of the two sides of the upper iron yoke 101, a lower iron yoke 103 is arranged at the bottom end of the iron core column 1, a second clamping plate 104 is fixedly connected to the horizontal positions of the two sides of the lower iron yoke 103, a mounting hole 105 is formed in the second clamping plate 104, ribs 106 are fixedly connected to the outer sides of the first clamping plate 102 and the second clamping plate 104, a butt joint seat 107 is fixedly connected to the outer sides of the second clamping plate 104, a screw 108 is movably inserted into the butt joint seat 107, the top end of the screw 108 is inserted into the first clamping plate 102, and nuts are connected to the top end of the screw 108 in a threaded manner; still include fastening assembly, clamping assembly and spacing subassembly, fastening assembly is including installing and cooperating between first splint 102 and second splint 104, and clamping assembly installs and uses at the top of first splint 102, and spacing subassembly installs and cooperates the use on clamping assembly.
Specifically, it should be noted that, the specific working principle inside the core column 1 is cited through the prior art, and not described in detail herein, an upper yoke 101 is fixedly connected to the upper portion of the core column 1, a lower yoke 103 is fixedly connected to the bottom end of the core column 1, the upper yoke 101 is clamped and fixed through a first clamping plate 102, and the lower yoke 103 is clamped and fixed through a second clamping plate 104.
As an implementation manner in this embodiment, the fastening assembly includes a docking post 2 movably inserted on the second clamping plate 104, one end of the docking post 2 is fixedly connected with a wafer 201, the other end of the docking post 2 is provided with external threads, one end of the docking post 2 is connected with a collar 202 in a threaded manner, a rotating plate 203 is fixedly connected to the collar 202, a supporting seat 204 is fixedly connected to the outer side of the first clamping plate 102, two groups of supporting seats 204 are provided, and a balance rod 205 is movably inserted between the supporting seats 204.
Specifically, when the space between the second clamping plates 104 needs to be adjusted to clamp and fix the lower iron yoke 103, the wrench is used to rotate the rotating plate 203, the collars 202 are fixedly connected to the two ends of the rotating plate 203, the collars 202 are driven to rotate through the rotation of the rotating plate 203, the collars 202 are in threaded connection with the butt joint columns 2, the butt joint columns 2 pull the second clamping plates 104 to move through the rotation of the collars 202, and therefore clamping and fixing are conducted on two sides of the lower iron yoke 103.
As an implementation manner in this embodiment, the clamping assembly includes a fixing frame 3 mounted at the top of the first clamping plate 102, a pair of limiting rods 301 are fixedly connected to the inside of the fixing frame 3, a pair of sleeves 302 are slidably connected to the pair of limiting rods 301, one end of each of the pair of sleeves 302 is fixedly connected to a baffle 303, a first spring 304 is sleeved on each of the limiting rods 301, two ends of the first spring 304 are fixedly connected to opposite sides of each of the pair of baffle 303, the other end of each of the sleeves 302 is fixedly connected to a clamping piece 305, a round hole 306 is formed in the bottom end of each of the clamping pieces 305, a limiting post 307 is movably inserted into the round hole 306, the limiting post 307 is fixedly connected to the first clamping plate 102, a fixing post 308 is fixedly connected to the sleeve 302, a top plate 309 is fixedly connected to the fixing post 308, and a sliding shaft 310 is fixedly connected to the middle position of the top surface of the top plate 309.
Specifically, the hexagonal wrench is used to rotate the screw head 405, the rotation of the screw head 405 drives the spindle 402 to rotate, the turntable 403 is fixedly connected to the bottom end of the spindle 402, the turntable 403 is driven to rotate through the rotation of the spindle 402, the sliding groove 404 is formed in the turntable 403, the sliding shaft 310 is connected to the sliding groove 404 in a sliding manner, the sliding shaft 310 slides in the sliding groove 404 through the rotation of the turntable 403, so that the top plate 309 is convenient to drive the sleeve 302 to slide on the limiting rod 301, and the clamping pieces 305 clamp and fix the two sides of the first clamping plate 102.
As an implementation manner in this embodiment, the limiting component comprises a pair of support plates 4 fixedly connected to the top surface of the fixed frame 3, an adjusting plate 401 is fixedly connected between the top ends of the pair of support plates 4, a main shaft 402 is rotatably connected to the middle part of the adjusting plate 401, a turntable 403 is fixedly connected to the bottom end of the main shaft 402, a sliding groove 404 is formed in the turntable 403, a sliding shaft 310 is slidably connected to the inside of the sliding groove 404, a screw 405 is fixedly connected to the top end of the main shaft 402, a fluted disc 406 is fixedly connected to the main shaft 402, a pair of fixing seats 5 are fixedly mounted on the adjusting plate 401, a sliding rod 501 is fixedly connected to the pair of fixing seats 5, a sliding seat 502 is movably sleeved on the sliding rod 501, the sliding seat 502 is fixedly connected to a moving block 503, a latch 504 is fixedly connected to the moving block 503, the latch 504 is clamped on the fluted disc 406, a second spring 505 is sleeved on the sliding rod 501, and a pull rod 507 is fixedly connected to the moving block 503.
Specifically, when the screw head 405 is rotated, the pull rod 507 is pulled, the pull rod 507 is fixedly connected to the supporting plate 506, the supporting plate 506 is fixedly connected to the moving block 503, the moving block 503 is moved through the pulling of the pull rod 507, the sliding seats 502 are fixedly connected to the two sides of the moving block 503 and are slidably connected to the sliding rod 501, the sliding seats 502 slide on the sliding rod 501 through the movement of the moving block 503, the moving stability of the moving block 503 is improved, the clamping teeth 504 are separated from the fluted disc 406 through the movement of the moving block 503, and therefore the screw head 405 is convenient to rotate.
The working principle of the invention is as follows: when the space between the second clamping plates 104 is required to be adjusted to clamp and fix the lower iron yoke 103, a wrench is used for rotating the rotating plate 203, the two ends of the rotating plate 203 are fixedly connected with the lantern rings 202, the lantern rings 202 are driven to rotate through the rotation of the rotating plate 203, the lantern rings 202 are connected to the butt joint columns 2 in a threaded mode, and the butt joint columns 2 pull the second clamping plates 104 to move through the rotation of the lantern rings 202, so that clamping and fixing are conveniently carried out on two sides of the lower iron yoke 103;
The hexagonal wrench is used for rotating the screw head 405, the rotation of the screw head 405 drives the main shaft 402 to rotate, the bottom end of the main shaft 402 is fixedly connected with the rotary table 403, the rotary table 403 is driven to rotate through the rotation of the main shaft 402, the rotary table 403 is provided with the sliding groove 404, the sliding shaft 310 is connected inside the sliding groove 404 in a sliding manner, the sliding shaft 310 slides inside the sliding groove 404 through the rotation of the rotary table 403, so that the top plate 309 is convenient for driving the sleeve 302 to slide on the limiting rod 301, and the clamping pieces 305 clamp and fix the two sides of the first clamping plate 102;
When the screw head 405 is rotated, the pull rod 507 is pulled, the pull rod 507 is fixedly connected to the supporting plate 506, the supporting plate 506 is fixedly connected with the moving block 503, the moving block 503 is moved through the pulling of the pull rod 507, the sliding seats 502 are fixedly connected to the two sides of the moving block 503, the sliding seats 502 are slidably connected to the sliding rods 501, the sliding seats 502 slide on the sliding rods 501 through the movement of the moving block 503, the moving stability of the moving block 503 is improved, the clamping teeth 504 are separated from the fluted disc 406 through the movement of the moving block 503, and therefore the screw head 405 is convenient to rotate.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (2)
1. The utility model provides a low noise's iron core reactor, includes iron core post (1), its characterized in that, iron core post (1) top is provided with iron yoke (101), go up iron yoke (101) both sides horizontal position laminating and have first splint (102), iron core post (1) bottom is provided with down iron yoke (103), the both sides horizontal position fixedly connected with second splint (104) of lower iron yoke (103), install mounting hole (105) on second splint (104), all fixedly connected with rib (106) in the outside of first splint (102) and second splint (104), the outside fixedly connected with butt joint seat (107) of second splint (104), movable the inserting is equipped with screw rod (108) on butt joint seat (107), the top of screw rod (108) is inserted and is established on first splint (102), the top threaded connection of screw rod (108) has the nut;
The clamping device comprises a first clamping plate (102), a second clamping plate (104), a fastening assembly, a clamping assembly and a limiting assembly, wherein the fastening assembly is arranged between the first clamping plate (102) and the second clamping plate (104) for use in a matched mode, the clamping assembly is arranged at the top of the first clamping plate (102) for use, and the limiting assembly is arranged on the clamping assembly for use in a matched mode;
The fastening assembly comprises a butt joint column (2) movably inserted on the second clamping plate (104), one end of the butt joint column (2) is fixedly connected with a wafer (201), the other end of the butt joint column (2) is provided with external threads, one end of the butt joint column (2) is in threaded connection with a collar (202), and the collar (202) is fixedly connected with a rotating plate (203);
The outer side of the first clamping plate (102) is fixedly connected with a supporting seat (204), two groups of supporting seats (204) are arranged, and a balance rod (205) is movably inserted between the supporting seats (204);
the clamping assembly comprises a fixed frame (3) arranged at the top of the first clamping plate (102), a pair of limiting rods (301) are fixedly connected inside the fixed frame (3), a pair of sleeves (302) are connected to the limiting rods (301) in a sliding manner, and a baffle (303) is fixedly connected to one opposite end of each sleeve (302);
A first spring (304) is sleeved on the limiting rod (301), and two ends of the first spring (304) are fixedly connected with one opposite side of the pair of baffle plates (303) respectively;
The other end of the sleeve (302) is fixedly connected with a clamping piece (305), a round hole (306) is formed in the bottom end of the clamping piece (305), a limit column (307) is movably inserted in the round hole (306), and the limit column (307) is fixedly connected to the first clamping plate (102);
a fixed column (308) is fixedly connected to the sleeve (302), a top plate (309) is fixedly connected to the fixed column (308), and a sliding shaft (310) is fixedly connected to the middle part of the top surface of the top plate (309);
The limiting assembly comprises a pair of supporting plates (4) fixedly connected to the top surface of the fixed frame (3), an adjusting plate (401) is fixedly connected between the top ends of the pair of supporting plates (4), and a main shaft (402) is rotatably connected to the middle part of the adjusting plate (401);
The novel spindle is characterized in that a turntable (403) is fixedly connected to the bottom end of the spindle (402), a sliding groove (404) is formed in the turntable (403), the sliding shaft (310) is connected to the sliding groove (404) in a sliding mode, a screw head (405) is fixedly connected to the top end of the spindle (402), and a fluted disc (406) is fixedly connected to the spindle (402).
2. A low noise core reactor according to claim 1, characterized in that: the adjusting plate (401) is fixedly provided with a pair of fixing seats (5), a pair of fixing seats (5) are fixedly connected with a sliding rod (501), a sliding seat (502) is movably sleeved on the sliding rod (501), the sliding seat (502) is fixedly connected with a moving block (503), a latch (504) is fixedly connected with the moving block (503), the latch (504) is clamped on the fluted disc (406), a second spring (505) is sleeved on the sliding rod (501), a supporting plate (506) is fixedly connected on the moving block (503), and a pull rod (507) is fixedly connected on the supporting plate (506).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410133093.9A CN117711761B (en) | 2024-01-31 | 2024-01-31 | Low-noise iron core reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410133093.9A CN117711761B (en) | 2024-01-31 | 2024-01-31 | Low-noise iron core reactor |
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| CN117711761A CN117711761A (en) | 2024-03-15 |
| CN117711761B true CN117711761B (en) | 2024-05-17 |
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| CN202410133093.9A Active CN117711761B (en) | 2024-01-31 | 2024-01-31 | Low-noise iron core reactor |
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