Fastening structure for use at low temperature

A first flange (11) and a second flange (12a) are superposed and fastened with a bolt (B) and a nut (N) in a fastening operation, to implement a fastening structure used at temperature lower than atmospheric temperature for the fastening operation. Assuming that the first flange (11) has a thickness...

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Bibliographische Detailangaben
Hauptverfasser:	MASUDA, TAKATO, SHIMODATE, MASATO, ASHIBE, YUUICHI, HONJO, SHOICHI, TAKAHASHI, Y, ETOH, KEISUKE
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING ELECTRICITY ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERATION HEATING INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINEDOPTICAL AND ELECTRIC CABLES OR LINES LIGHTING MECHANICAL ENGINEERING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A first flange (11) and a second flange (12a) are superposed and fastened with a bolt (B) and a nut (N) in a fastening operation, to implement a fastening structure used at temperature lower than atmospheric temperature for the fastening operation. Assuming that the first flange (11) has a thickness L1 and a coefficient of linear expansion alpha 1, the second flange (12a) has a thickness L2 and a coefficient of linear expansion alpha 2, superposed first flange (11) and second flange (12a) have a thickness L, and the bolt (B) has a coefficient of linear expansion alpha , a relation of L. alpha ≥ L1. alpha 1 + L2. alpha 2 is satisfied, i.e. heat shrinkage of the bolt (B) is not smaller than the total heat shrinkage of the first and second flanges (11, 12a). Thus, impairment of sealing property due to heat shrinkage is avoided at a flange junction used at low temperature.