The Correct Way to Start a High-Temperature Centrifugal Fan
Based on the usage of most high-temperature centrifugal fans, their performance is influenced by many factors. The performance parameters of high-temperature centrifugal fans primarily include flow rate, pressure, output, efficiency, and speed. Additionally, noise and vibration levels are also significant factors, just as they are for centrifugal fans in general.
Flow rate, considered the primary design indicator for air volume, is expressed as the amount of gas flowing through the centrifugal fan per unit of time. Pressure, also known as air pressure, refers to the increase in gas pressure within the high-temperature centrifugal fan, such as static pressure, dynamic pressure, and total pressure. The input power of a high-temperature centrifugal fan is its shaft power. Shaft power is a key indicator of the fan’s efficiency. These fans are primarily used in national economic sectors such as metallurgy, petrochemicals, power generation, urban rail transportation, textiles, and shipbuilding, as well as for ventilation in various settings.
In addition to traditional applications, they will also be used in the comprehensive utilization of steel slag, innovations in new dry-plate car technology, and metallurgy. With over 20 potential market sectors—including energy conservation and comprehensive resource utilization in the industry—there is significant room for future development.
Operating conditions vary depending on the starting method. However, please note that the current during full-voltage starting is approximately 5 to 7 times the rated current, and the starting torque during reduced-voltage starting is proportional to the square of the voltage. When grid capacity is insufficient, a step-start method is required. Therefore, it is recommended that the person in charge of commissioning test various starting methods.
This approach will yield more insights and provide significant benefits for the future use of high-temperature-resistant centrifugal fans. Before commissioning, carefully read the product manual to verify the wiring method and ensure it matches the wiring diagram; The power supply must be carefully checked to ensure the operating voltage meets requirements, that the power supply is in phase, and that the capacity of the distribution components meets requirements.
When commissioning two high-speed centrifugal fans, start at low speed first to confirm the rotation direction is correct. When starting a high-temperature-resistant centrifugal fan at high speed, to prevent motor damage caused by switch tripping or high-speed reverse rotation, the fan must be started only after it has come to a complete stop. If the operating current exceeds the rated current, please verify the supply voltage. Generally.
These are the requirements for the actual operating conditions of the motor when using a high-temperature centrifugal fan. Only by adhering to these requirements can the high-temperature centrifugal fan function fully, ensuring it does not lose its utility or effectiveness due to motor issues. For common motor failures, an effective maintenance strategy must be developed to address unexpected issues.
