| 摘要 |
PURPOSE:To obtain a hermetically sealed structure for blocking oil flowing into a motor, by providing a collar, of which the upper end is upwardly protruded, to the outer periphery of the protruded base end part of a motor shaft while providing the cover part for covering the collar to the boss part of a blower. CONSTITUTION:A blower 13 is rotated by a motor 8 to guide gas containing oil mist from an introducing duct and mist is separated and collected by a filter. The motor 8 is provided so that a motor shaft 9 is protruded upwardly through an inner cover 7 to be engaged with and fixed to the boss part of the blower 13. A collar 17 is provided to the outer periphery of the protruded part of the motor shaft 9 and a cover part 11 is provided to the side of the boss part 11 so as to be directed downwardly. Therefore, oil is prevented from penetrating into the motor 8 by the hermetically sealed structure consisting of the collar part 17a in the side of the boss part covering the upper end of the collar 17 and the resin coking 18 between the collar 17 and the upper end surface of the motor 8.
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