隧道式离心风机主要用于地下隧道通风换气，亦可用于铁路隧道，山洞及地下工程和建筑物的通风换气，是一种高压力，低噪声，高效离心风机。隧道离心风机是一种特殊的离心风机，主要用在公路、铁路及地铁等隧道的纵向通风系统中。造成离心风机轴承过热的原因有哪些呢？
Tunnel centrifugal fan is mainly used for ventilation and ventilation in underground tunnels, railway tunnels, caves and underground engineering and buildings. It is a high pressure, low noise and high efficiency centrifugal fan. Tunnel centrifugal fan is a special centrifugal fan, which is mainly used in the longitudinal ventilation system of highway, railway and subway tunnels. What are the causes of overheating of centrifugal fan bearings?
1、离心风机主轴或主轴上的部件与轴承箱摩擦；
1. Friction between the parts of the spindle or spindle of the centrifugal fan and the bearing box;
2、电机轴与风机轴不同心，使轴承箱内的内滚动轴承别动；
2. The motor shaft is not concentric with the fan shaft, so that the inner rolling bearing in the bearing box does not move.
3、轴承箱体内润滑脂过多；
3. Excessive grease in the bearing box;
4、轴承与轴承箱孔之间有间隙而松动，轴承箱的螺栓过紧或过松；
4. There is a gap between the bearing and the bore of the bearing box, and the bolt of the bearing box is too tight or loose.
