Hermetic compressor
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United States of America Patent
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Apr 11, 2017
Grant Date -
Jun 11, 2015
app pub date -
Jun 11, 2013
filing date -
Jun 13, 2012
priority date (Note) -
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Abstract
A hermetic compressor includes: a main bearing (126) which supports a main shaft (120) of a shaft (119); and a thrust ball bearing at an upper end portion of the main bearing (126). A rotor (116) is fixed to the main shaft (120) via a flange. A rotor core (117) has a magnetic center displaced upward relative to the magnetic center of a stator core (115) so that a downward magnetic attractive force is applied between the rotor (116) and the stator (114). Accordingly, a contact load between steel balls and upper and lower races in the thrust ball bearing is appropriately maintained.
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