Positive pressure ventilation system of power chamber of diesel locomotive

The invention discloses a positive pressure ventilation system of a power chamber of a diesel locomotive. The positive pressure ventilation system comprises a sealed clean air chamber and a power chamber, wherein the clean air chamber is internally provided with a ventilation fan; the power chamber is internally provided with a main generator, a diesel engine and original equipment; the outlet end of an air filter is connected with the ventilation fan; the ventilation fan is respectively connected with the main generator, the diesel engine and the original equipment by virtue of a main air duct; the main air duct is externally connected with an air duct which is connected and communicated with an air outlet pipe of the power chamber. The positive pressure ventilation system has the advantages that air is clean; the air entering into the power chamber is filtrated by the air filter, so that the dust removal rate is up to 90%, and the power chamber is prevented from being polluted by outside dust and sand; positive pressure ventilation is adopted, so that the positive pressure station in the power chamber is ensured, and dust, sand and the like outside a vehicle are prevented from being sucked into the power chamber; district cooling is adopted, and cooling air is guided to different regions of the power chamber by virtue of air distribution ducts, so that the cooling target is explicit; the outlets of the air distribution ducts are provided with throttling plates, so that the air outlet quantity can be regulated.