| 摘要 |
In order to provide a ventilator hub having coupling elements for connecting to a ventilator spindle and an essentially cylindrical fastening section having radial adapters for a number of ventilator blades, whereby the fastening section has an inner casing surface that ensures fastening of the ventilator blades with sufficient tensile strength, even at high temperatures, such as they can occur in tunnel fires, without thereby having an undesirably high mass, it is proposed to provide the ventilator hub with an essentially annular, closed reinforcement element having coupling elements for fastening the ventilator blades with high tensile strength, that is designed essentially separate from the fastening section. |
