MAGNETO-CONTACT TEMPERATURE-SENSITIVE ELEMENT

摘要

FIELD: measurement technology, continuous monitoring of temperature level. SUBSTANCE: given temperature-sensitive element has metal diamagnetic air-tight case that houses dielectric bushing. Twin conductor connected to immobile contacts is made fast to bushing. Contacts are interbridged by means of mobile current conductive jumper. Dielectric bushing is fixed in case over its perimeter by shaped nut-plug. Immobile contact are built into magnetic circuit. Magnetic circuit is made of two parts in the form of round segments from thermomagnetic alloy, for instance, from Fe-Ni-Co with Curie point <EMI ID=0.173 HE=9 WI=18 TI=CHI>= +70 C. Mobile current conductive jumper is produced as mobile contact in the form of permanent magnet having shape of cylinder manufactured from magnetically hard material ( <EMI ID=0.174 HE=9 WI=39 TI=CHI>=+870-900 C ). Permanent magnet has surface contact layer in the form of ring made from current conductive material in working zone. Center of mobile closing contact is kinematically coupled to direct-stroke rod and compression spring installed in central hole of dielectric bushing closed on outer butt by blank washer with lockpin. Usage of magneto-sensitive element and compression spring in temperature-sensitive element results in its miniaturization and in compensation of gravity forces under certain positions of element. EFFECT: enhanced operational reliability. 5 dwge