Three Key Factors for Selecting High-Pressure Direct-Coupled Centrifugal Fans

To ensure proper selection, it is recommended to first determine the gas flow rate, pressure, and density before making a choice. These three elements are essential in the process of selecting a high-pressure direct-coupled centrifugal fan. Gas density is a critical factor in the selection process. If the operating conditions of the high-pressure direct-coupled centrifugal fan equipment are not specified—such as altitude, local atmospheric pressure, or operating temperature—the density of the gas under operating conditions must be calculated. Similarly, gas pressure conditions are a highly significant factor. Typically, the operating density is calculated based on given parameters or through computation. Subsequently, the pressure at standard conditions for the high-pressure direct-coupled centrifugal fan equipment is derived from the operating pressure. If an inlet plenum or silencer is installed concurrently, pressure losses must also be considered. Next, attention should be paid to gas flow rate. For instance, if the mass flow rate of the gas is required, it must be converted to the volumetric flow rate of the high-pressure direct-coupled centrifugal fan under standard conditions. Calculating the specific speed is also an indispensable step in fan selection and serves as a crucial reference. Performance parameters such as volumetric flow rate and total pressure should be converted to the fan's standard conditions. Substituting the rotational speed into the specific speed formula allows calculation of the specific speed for different speed requirements. In fact, numerous factors must be considered when selecting a high-pressure direct-coupled centrifugal fan. Within this section, the precise calculation of rotational speed proves particularly critical. Subsequently, the performance curve must be determined based on the fan model. Within this section, the specific content focuses on the specific speed testing of high-pressure direct-coupled centrifugal fan equipment and the selection of the appropriate fan model. Additionally, the impact of gas compressibility on high-pressure direct-coupled centrifugal fan equipment must be considered. The internal power of a high-pressure direct-coupled centrifugal fan can be calculated based on actual operating performance. How should centrifugal fans be selected for different applications? Those familiar with fans generally understand that when selecting centrifugal fan equipment, performance may vary depending on the specific operating environment. For instance, when using centrifugal fans in warehouses, procurement considerations include whether stored goods are flammable or explosive (e.g., paint storage). In such cases, explosion-proof centrifugal fans must be selected. Naturally, operational noise levels must also be evaluated when choosing warehouse fans. Additionally, the required ventilation volume for warehouse air must be assessed to select appropriate fan equipment. Many users also seek solutions for kitchen exhaust requirements. For kitchens with indoor direct exhaust systems Additionally, simultaneously inspect the contact between the rotor, bracket, and thrust bearing. Generally, contact should be uniform with an angle around 60 degrees. Note that when checking thrust bearing contact, measure the total axial clearance of the thrust bearing using the shaft surface gauge of the centrifugal corrosion-resistant fan. After inspection and installation, verify the clearance between critical sealing components in the centrifugal corrosion-resistant fan. Typically, four sections are measured both horizontally and vertically. Horizontal gaps are typically measured with a straightedge, while vertical gaps require wire gauges. Before final installation, the centrifugal corrosion-resistant fan must undergo alignment. When aligning the unit, the upper stator and bearing housing cover must be installed first to prevent misalignment caused by the fan's self-weight.