Countercurrent cooling system applied to negative pressure Roots blower

The utility model discloses a countercurrent cooling system applied to a negative pressure Roots blower, which comprises a countercurrent cooling silencer, the countercurrent cooling silencer is provided with two cooling branches, and the two cooling branches of the countercurrent cooling silencer both start from the countercurrent cooling silencer. And two cooling branches of the countercurrent cooling silencer are ended at the bottom of the negative pressure Roots blower. The two cooling branches are adopted, the temperature of the bottom of the fan shell is reduced, conduction of heat to a bearing and lubricating oil is reduced to the maximum extent, and the service life of the whole fan is prolonged. 本实用新型公开了一种应用于负压罗茨风机的逆流冷却系统，包括逆流冷却消音器，逆流冷却消音器设置有两路冷却支路，逆流冷却消音器的两路冷却支路均起始于逆流冷却消音器，逆流冷却消音器的两路冷却支路终止于负压罗茨风机的底部。本实用新型采用两路冷却支路，降低了风机壳体底部的温度，在最大程度上降低了热量向轴承与润滑油的传导，提高了风机整体使用寿命。