The invention discloses a double-source locomotive energy-saving noise-reduction ventilation system which comprises an internal combustion energy-saving fan and an electric power energy-saving fan, an air outlet of the internal combustion energy-saving fan passes through an internal combustion ventilation duct, the internal combustion ventilation duct is communicated with a power chamber through a first ventilation duct branch, and the internal combustion ventilation duct is communicated with an internal combustion traction motor through a second ventilation duct branch. An internal combustion section cover plate is arranged on the second ventilating duct branch; an air outlet of the electric power section fan passes through an electric power ventilating duct, the electric power ventilating duct is communicated with the main generator chamber through a third ventilating duct branch, the electric power ventilating duct is communicated with an electric power section traction motor through a fourth ventilating duct branch, and an electric power section cover plate is arranged on the fourth ventilating duct branch. According to the ventilation system, the cover plate mechanism is installed at the air inlet of the traction motor, when the double-source locomotive is in the mixed mode, the cover plate mechanism is automatically closed, the rotating speed of the draught fan is reduced while the power chamber is cooled, and the purposes of saving energy and reducing noise are achieved.

本发明公开了一种双源机车节能降噪通风系统，该系统包括内燃节风机和电力节风机，内燃节风机的出风口通过内燃通风道，内燃通风道通过第一通风道支路连通动力室，内燃通风道通过第二通风道支路连通内燃节牵引电机，第二通风道支路上设有内燃节盖板；电力节风机的出风口通过电力通风道，电力通风道通过第三通风道支路连通主发电机室，电力通风道通过第四通风道支路连通电力节牵引电机，第四通风道支路上设有电力节盖板，还包括机车微机和机车逆变器。本发明的通风系统在牵引电机进风口安装一个盖板机构，当双源机车处于混合模式时，盖板机构自动关闭，在满足动力室冷却的同时降低风机转速，达到节能降噪的目的。