Summary of the Most Common Failures in Explosion-Proof Axial Flow Fans

Summary of the Most Common Failures in Explosion-Proof Axial Flow Fans

During the operation and use of explosion-proof axial flow fans, malfunctions of varying severity frequently occur. To effectively extend the service life of these fans, it is important to pay closer attention to them during operation and maintenance. While there are many types of failures and the causes are complex, investigation results indicate that the primary failures of explosion-proof axial flow fans are as follows. There are four main types. First, excessive bearing vibration. Second, high bearing temperature. Third, immobility of the moving blades. Fourth, false triggering of protective devices. As is well known, the selection, installation, and proper use of explosion-proof axial flow fans require careful attention. For example, when purchasing, pay attention to model selection, the functions required by the installation environment, pre-installation preparations, the layout of the installation site, and routine maintenance—all of which the user must take into account. During normal operation of explosion-proof axial flow fans, several points require attention. First, it is essential to regularly monitor flow issues during operation. If the flow rate is found to be excessively high, it does not meet operational requirements. However, if a relatively low flow rate is required for a short period, consider using a throttling device for adjustment and control. Second, explosion-proof axial fans have very strict requirements regarding temperature and oil standards during operation. To prevent the fan from malfunctioning, it is essential to monitor the oil level in the bearing reservoir and regularly check the sensitivity of the temperature gauge and oil level indicator. The oil grade must remain within the specified range and must not exceed the standard limits. Third, if any abnormalities are detected in the fan during operation, while stopped, or during startup, a thorough inspection must be conducted immediately to confirm the issue before resuming use. If minor faults are discovered during the inspection process, the cause should be identified promptly, and the issue resolved using a targeted approach to address the problem as quickly as possible. If these minor faults cannot be resolved independently, the machine must not be disassembled haphazardly. Fourth, if the explosion-proof axial flow fan requires disassembly, all fan components must be properly stored, and the lubricating oil must be replaced promptly during each disassembly. To ensure the normal operation of all components and extend the fan’s service life, inspections must begin with the details.