Summary of Common Misconceptions Regarding the Use of Duct Fans

Although duct fans are widely used, a lack of thorough understanding can lead to certain misconceptions during operation. If these are not corrected in a timely manner, they may affect normal operation. It is therefore essential to gain a thorough understanding of these issues and take steps to avoid them. We shall now briefly analyse some common issues. One point to note is that when re-installing the end caps of the duct fan bearings during maintenance, care must be taken to avoid installing the fixed end cap and the free end cap incorrectly. In fact, to prevent the effects of high temperatures, duct fan manufacturers design non-locating bearings on the rear of the machine during the manufacturing process. Consequently, errors may occur during installation, and this requires attention. The second common error is that, when adjusting the duct fan, precision requirements are often met by tightening or loosening the anchor bolts. Shims may be used during adjustment, which are placed between the motor or hydraulic coupling and the base plate. This is also incorrect and may easily lead to problems during future operation. One issue is that, during long-term use, lubrication maintenance of the duct fan bearings is often neglected due to oversight or poor management. Typically, duct fans are lubricated by an oil pump, and oil leaks are rare. However, it is essential to check whether the lifting eyes are damaged. If damaged, please repair them promptly. This is to ensure that, in the event of an accident, a sufficient quantity of oil is supplied to the bearings to guarantee normal operation. The above outlines some common misconceptions to avoid when installing and using duct fans. Please take note of these and do your utmost to avoid them to ensure the normal operation of the duct fan equipment.