Comparison of Centrifugal High-Pressure Blowers and Turbine Compressors

Comparison of Centrifugal High-Pressure Blowers and Turbine Compressors

In fact, the operating principles of centrifugal high-pressure fans and turbine compressors are similar; during operation, the gas flow rate is low and pressure changes are minimal. Therefore, changes in the specific volume of the gas generally do not need to be considered. In other words, the gas can be treated directly as an incompressible fluid. So, what are the differences and similarities between the two? In contrast, the pressure generated by centrifugal high-pressure fans is more susceptible to several factors, such as changes in inlet temperature and density. Currently, these units are widely used for ventilation, dust removal, and cooling in factories, tunnels, cooling towers, mines, and vehicles, as well as for ventilation and air intake in boilers and industrial furnaces. Consequently, the construction of centrifugal high-pressure blowers tends to be relatively more complex. They primarily consist of an inlet, outlet, valves, an impeller, and a motor. Performance varies under different operating conditions. However, wear in the gearbox section—specifically wear at the bearing positions of the exhaust fan, wear in the bearing housing, and wear at the bearing positions of the blower shaft—is one of the most common issues. For users, if such problems occur, it is necessary to take corrective measures in a timely manner. To address the above issues, traditional methods have included surface welding, thermal spraying, and erosion. However, these methods have several drawbacks. For example, thermal stress caused by high repair welding temperatures cannot be completely eliminated, which can easily lead to material damage, component bending, or breakage. Meanwhile, electroplating is limited by coating thickness and is prone to peeling. In other words, both methods have their own characteristics. For users, the choice depends primarily on actual conditions. However, when using centrifugal high-pressure blowers, it is important to be aware of the issues mentioned above.