| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a highly reliable ventilation facility for a tunnel having little influence on the main function of the ventilation facility by failure of an auxiliary machine, without requiring a power increase in a driving apparatus for rotatingly driving a main exhaust air blower blade. <P>SOLUTION: This ventilation facility for the tunnel includes a main exhaust air blower 102, and includes a cooling fan 7 directly driven by an electric motor 2 for driving the main exhaust air blower blade 5, the electric motor 2 is arranged on the upstream side of the main exhaust air blower blade 5 in an exhaust flow passage 101, the electric motor 2 is covered with an electric motor protective cover 6, an external cooling air introducing port 8 is arranged in an opposite side side part of the main exhaust air blower blade 5 of the electric motor protective cover 6, an external cooling air discharge port 9 is arranged in a side part on the main exhaust air blower blade 5 side, and external cooling air introduced into the electric motor protective cover 6 by passing through an external cooling air introducing duct 10, is discharged in the exhaust flow passage 101. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
