Silencing equipment for an air-cooling assembly

Abstract

Silencing equipment is provided for an air-cooling assembly in a large off-road vehicle having wheels, traction motors for the wheels that operate in a motoring mode to propel the vehicle and a power generating dynamic braking mode, resistor grids for dissipating the dynamic braking power, and a blower for moving cooling air past the grids to cool them. The silencing equipment may include a resistor grid housing 24 and at least one upper inlet 22 for passing cooling air to the interior of the housing. The inlet includes noise-absorbing material. A conduit 28 is provided for directing cooling air from the upper inlet through a transition chamber to reach the blower and at least one resistor grid in the housing. The conduit is lined with noise-absorbing material. A removable cover 30 is provided for the conduit for accessing the air blower in the housing through the transition chamber, whereby servicing of the blower may be performed without removal of the entire upper inlet. In another aspect, the silencing equipment includes at least one outlet 31 for exhausting air from the resistor grid housing. This outlet includes a plurality of exhaust vanes positioned at an angle relative to a stream of exhaust air to impart a deflection to the exhaust air into a desired direction. The plurality of exhaust vanes includes noise-adsorbing material whereby this one outlet combines air deflection and silencing in a single device.

Dependencies are inferred from the claim text.