| Muhimmiya | Vziman |
| Model NO. | Kwọnụrụ nri ọnwụ (kwọnụrụ ebe) |
| Kpọmkwem kwamnyereke | 20000kVA |
| Siri | Ladle refining furnace transformer |
Tarayya
Na'urar kafin (LF kafin) na tashar mutanen kafin da kafin mai yawa shi ne muhimmiyar wurin a tattalin kafin da kafin mai yawa. Ana amfani da shi don bayar zabe ta masu kafin mai yawa a tattalin kafin. Kyaukan sha ya tabbatar da darajar, gudummawa, da kuma amincewa a tattalin kafin. Ba da hanyar rike tushen kafin mai yawa, musamman fitaccen LF kafin da ke da 40 ton, ana yi tasiri a kan hanyoyin da kuma ma'adanin kafin, wanda ya zama tsarin ilimi da ke da amincewa, dabi'a, da kuma karfin ba da aikatau.
Abubuwan Da Su Muhimmiya
Amincewa: Hasashe ba da juye, ba da juye, ba da juye; an yi aiki a cikin hasashe na zabe da Baowu/Nippon Steel 30Z130/30Q130.
Dabi'a: 30+ shekara na takaice; kafin da take da karama, German Georg shearing (<0.02mm burr), low-magnetic steel clamping.
Karfi: Aiki a 120% na juye tare da oxygen-free copper windings, small oil gaps, da kuma cooling cylinder structures. Ba da aikatau: 10+ shekara bili aikatau; vacuum oil injection, anti-aging seals, da kuma folded plate tanks prevent leaks.
Kwakwalowa
Abu: An amfani da Baowu 30Z130 ko Nippon Steel 30Q130 silicon steel, abubuwan da ake amfani a kasashen duniya.
Tartura: Full oblique-joint lamination design with low-magnetic steel plate pull rods for clamping, eliminating punching holes to ensure uniform magnetic flux density across core sections without distortion.
Processing: German Georg shearing line controls burrs ≤0.02mm (standard ≤0.05mm) and length tolerance ≤0.2mm/m, improving lamination factor to reduce local overheating, noise, and no-load losses.
Material: Oxygen-free copper magnet wires (P<0.017241 at 20°C) with precise insulation paper wrapping.
Design: Small oil gaps, internal/external oil baffles, and cooling cylinder structure enhance axial/radial stability, overload capacity, and reduce losses.
High-Voltage Solutions: "8"-type coils for one-time winding in high-load voltage regulation and 110kV-grade products, improving strength and reducing eddy current losses.
Structure: Laminated wood for all wooden parts to enhance lead frame rigidity; upper/lower pressboards made of insulation boards or epoxy molded parts to increase conductor-to-ground insulation distance and reduce "window height" dimensions.
Insulation: Imported cardboard for main insulation, multi-coil integral assembly, and Norwegian steam drying equipment to ensure thorough drying without damaging insulation.
Design: Folded plate structure minimizes welds, tested for positive/negative pressure to ensure sealing reliability.
Loss Reduction: Low-magnetic steel or magnetic shielding in strategic positions reduces additional losses from busbar magnetic fields on the tank wall, effectively preventing leakage and reducing losses.
Process: Hydraulic compaction after body drying and vacuum oil injection to eliminate winding bubbles and reduce partial discharge.
Sealing: Anti-aging sealing materials address oil leakage; control circuits (gas relay, thermometers, etc.) integrated into a top-mounted junction box for a sleek, unified appearance.
Cooling: YS1 water-coolers or stainless steel spiral plate coolers; anti-pollution high-voltage bushings increase creepage distance.
Tap Changers: Advanced "M" or "V" type from leading manufacturers with remote display and control interfaces.
Oil System: Karamay naphthenic anti-aging transformer oil in fully enclosed tanks with pressure relief valves and diaphragm conservators for complete protection.
Transformer Maintenance and Technical Assurance Summary
For transformer maintenance, long-distance transported core-hanging products require post-arrival checks to address loose fasteners and facilitate user acceptance, while routine overhauls should focus on replacing mechanical wear parts (e.g., pumps) per the original cycle. Quality assurance includes designing windings with a 20% overload margin (e.g., 24000kVA for a 20000kVA-rated LF furnace transformer) to ensure stable operation at 120% load, with impedance voltage ≤8% and heat load calculations based on the higher capacity. Anti-impact and short-circuit measures enhance coil axial/radial stability via high-voltage-grade wires, precise drying, hydraulic compaction, and multi-support structures. To guarantee 20-year maintenance-free operation, the design uses Karamay naphthenic oil in fully enclosed tanks with diaphragm conservators, anti-aging seals, and regular oil chromatographic analysis. Key improvements include Baowu/Nippon Steel silicon steel cores with ultra-low burr shearing, oxygen-free copper windings with small oil gaps, laminated wood bodies, folded-plate tanks with magnetic shielding, and integrated control systems. Future trends for ore-heating furnaces include single-phase transformers with side-mounted water-cooling for ≥15000kVA models, while maintenance prioritizes non-intrusive monitoring via oil analysis to reduce costs and contamination risks.
