" Jaykrishna make “ lifting magnets for heavy duty application are designed on the basis of research in this specialized field. The most favorable dimensioning of all components was determined by thorough mathematical and measuring studies of all factors affecting on performance. Experiments on models and full scale prototypes were carried out to determine such features as usable and stray magnetic flux; influence of field line length and iron cross section; temperature drop from hottest point to magnet surface; thermal properties of the entire magnet; suitability of materials and production methods.
All " Jaykrishna make" lifting magnets are of weatherproof design for outdoor use. Completely sealed submersible models are available for dipping into water-field containers or underwater salvage and similar work.
Magnet body
Mechanical construction of " Jaykrishna make " high capacity lifting magnets is very sturdy to meet toughest demands in service. The one piece magnet body is fabricated t from high-grade dynamo steel. Underneath, between center and outer poles, the magnet body is closed by sturdy, cast and rib-reinforced non-magnetic authenticate manganese steel plate. Fastening at the center pole is effected by means of a shrunk-on ring, and at the outer pole by locking ring. The standard three-fall chain suspension, designed with common suspension ring is rated to meet all normal duty load. Special change are available on request for extremely heavy loads. Two lugs for guide ropes are fitted as standard.
CoilsStandard exciter coils are wound with Anodised aluminum conductor or fiber glass covered varnish bonded aluminum conductor.
Coils wound with anodised aluminium conductor offer the following advantages: - Greater filling factor
- Better heat conductivity.
- Higher resistance to thermal strain.
Coils are cast into their magnet body with a special resin compound of excellent heat conductivity and thus rigidly fixed in position. In special cases, coil can be furnished with copper conductor. Use of special resins loaded with fillers as sealing compound ensures reliable conduction of heat to the magnet surface, maintaining high magnet performance over long, continuous service. All insulation materials confirm to class " H".
Duty circleThe permissible relative duty factor is 75% / 10 mins. or 60% /10 mins. depending on magnet construction and application. The standard operating voltage is 220 volts DC. Magnets for extra heavy duty or handling of hot materials are available on request.
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