MOIR MICHAEL BRUCE,VINOKUR ROMAN,MAY FREDERICK ARLET,DOUDKINE DMITRI ANATOLIEVICH,KENYON BARTON JOHN,SMITH CHRISTOPHER JAMES
申请号：
NZ61406312
公开号：
NZ614063A
申请日:
2012.02.22
申请国别(地区):
NZ
年份:
2015
代理人:
摘要：
A wearable PAP system comprising a blower (510). The blower (510) includes a housing including an inlet and an outlet, a stationary component provided within the housing, an impeller positioned between the inlet of the housing and the stationary component, and a motor adapted to drive the impeller. The stationary component includes a tube portion structured to retain and align a pair of bearings (552, 554) that rotatably support a shaft (550), or rotor, to which the impeller is coupled. The tube portion includes a diameter in a side closest to the impeller that is sufficient size to accommodate adhesive to retain one of the bearings. The shaft (550) comprises a groove (551) that acts to reduce the stiffness of the shaft to attenuate mechanical resonances, lower the magnitude of imbalance, and/or reduce bearing frequency peaks in use. The diameter of the groove may be between 50% and 95% of the shaft outer diameter, and the width of the groove may be between 20% and 50% of the shaft outer diameter. Smaller grooves (not shown) may extend along the length of the shaft, particularly in a double helix configuration.
