Blower bearing preloading technology: the key to improving operating accuracy and equipment life

1. The influence and challenges of bearing clearance
The blower bearing is designed with a certain gap inside to accommodate factors such as thermal expansion, contraction, and manufacturing tolerances. However, these gaps can cause a series of problems when running at high speeds. First, the existence of gaps makes the contact between the bearing rolling elements and the inner and outer rings unstable, resulting in vibration and noise. Secondly, the gap may also cause slight movement of the shaft, affecting the rigidity of the shaft system, thereby reducing the stability of the entire blower system. In the long run, this unstable operating state will aggravate the mechanical wear of bearings, shafts and surrounding structures, increase maintenance costs, and even lead to premature scrapping of the equipment.

2. Principle and application of preloading technology
Preload technology, as an important means to improve bearing performance, its core is to eliminate or reduce the internal gap by adjusting the assembly state of the bearing, so that the bearing is in a certain preload state before operation. This preload can effectively increase the contact area between rolling elements and raceways, improve contact stiffness, and thus significantly reduce vibration and noise levels. In addition, preloading can effectively restrain the movement of the shaft, enhance the overall rigidity of the shaft system, and ensure that the blower can still maintain high precision and stability when operating at high speed.

In practical applications, preloading technology can be implemented in a variety of ways, such as adjusting the matching clearance between the bearing seat and the shaft, using preloading washers, spring preloading devices, etc. Different preloading methods are suitable for different working conditions, and the selection needs to be comprehensively considered based on the specific model, speed, load and other factors of the blower. The correct amount of preload is crucial. If it is too little, the gap cannot be effectively eliminated. If it is too much, it may cause the bearing to overheat, increase wear, or even be damaged.

3. Benefit analysis of preloading technology
Improved operating accuracy: Through preloading, the internal clearance of the bearing is effectively eliminated, and the contact between the rolling elements and the raceway is more uniform and stable, thereby significantly improving the operating accuracy of the blower and ensuring the stability and uniformity of air flow output.
Enhanced operating stability: Preloading technology enhances the rigidity of the shaft system, effectively preventing shaft movement, allowing the blower to operate stably under complex working conditions, and reducing downtime due to vibration.
Extend equipment life: The reduction of vibration and noise directly reduces the mechanical wear of bearings, shafts and surrounding structures, extends the service life of equipment, and reduces maintenance costs and replacement frequency.
Energy saving and emission reduction: Stable operating status means a higher energy efficiency ratio, reducing energy consumption and carbon emissions, which is in line with the current development trend of green manufacturing.