隧道式離心風機主要用於地下隧（suì）道通風換氣（qì），亦可用（yòng）於鐵路隧道（dào），山洞及（jí）地下工程和建築（zhù）物的通風換氣，是一種高壓力，低（dī）噪聲（shēng），高效離心風機。隧道離心風機是一種特殊的離心風（fēng）機，主要用在公路、鐵路及地（dì）鐵（tiě）等隧道（dào）的縱向通風（fēng）係統（tǒng）中。造成離心風（fēng）機軸承過熱的原因有哪些呢？
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、離心（xīn）風機主軸或主軸上的部件與軸承箱摩擦；
1. Friction between the parts of the spindle or spindle of the centrifugal fan and the bearing box;
2、電機軸與風機軸不同心，使軸承（chéng）箱內（nèi）的（de）內（nèi）滾動軸承別動；
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、軸承箱體（tǐ）內潤滑脂過多；
3. Excessive grease in the bearing box;
4、軸承與軸承箱（xiāng）孔之間有間隙而鬆動，軸承箱的螺栓過緊或過鬆；
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.
