ELECTROMAGNETICALLY-DRIVEN RECIPROCATING MECHANISM

PROBLEM TO BE SOLVED: To reduce leakage of magnetic flux from an electromagnetic actuator so as to eliminate an influence of magnetic disturbance on the surrounding without increasing size and weight of a device in an electromagnetically driven reciprocating mechanism used to a Sterling refrigerator...

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Bibliographic Details
Main Authors FUJINAMI FUTOSHI, WATABE TOSHIHARU, OSHIMA KEIJI
Format Patent
LanguageEnglish
Published 02.06.1999
Edition6
Subjects
BLASTING
COMBINED HEATING AND REFRIGERATION SYSTEMS
HEAT PUMP SYSTEMS
HEATING
LIGHTING
LIQUEFACTION SOLIDIFICATION OF GASES
MANUFACTURE OR STORAGE OF ICE
MECHANICAL ENGINEERING
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
REFRIGERATION MACHINES, PLANTS OR SYSTEMS
REFRIGERATION OR COOLING
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To reduce leakage of magnetic flux from an electromagnetic actuator so as to eliminate an influence of magnetic disturbance on the surrounding without increasing size and weight of a device in an electromagnetically driven reciprocating mechanism used to a Sterling refrigerator, etc., for cooling an infrared ray detecting element. SOLUTION: In a Sterling refrigerator in which a reciprocative electromagnetic actuator 4 is incorporated in the housing 1a of a compressor 1 as a driving part for a piston 1b and which is supported movable in axial direction by means of a suspension spring 5 where a piston rod 1c is incorporated in a housing, the suspension spring 5 located adjacent to a clearance (opening of magnet path) between yokes 4b and 4c as a means for blocking a flux of magnet leaking from the electromagnetic actuator and a supporting cylinder 6 for the suspension spring 5 are made of high permeability material (suspension spring: precipitation hardening type stainless steel; supporting cylinder: electromagnetic soft iron, low-carbon steel, silicon steel) and are allowed to work as a magnetic shield to leaking magnetic flux.
Bibliography:Application Number: JP19970315308