Let's talk about the installation methods, main uses, and fault analysis of high-temperature fans.

　　Assembly method:

　　1. There are two methods. From the perspective of the motor side, if the centrifugal impeller rotates clockwise, it is called a right cyclone fan, indicated by 'right'; if the centrifugal impeller rotates counterclockwise, it is called a left centrifugal fan, indicated by 'left'.High-temperature fan2. The outlet of the high-temperature fan is indicated by the angle of the air outlet of the shell. Centrifugal fans No. 1.5 to 6 are manufactured in an adjustable form at the factory, and the operating unit assembles them into the required parts according to demand. The adjustment standard for the ventilation port is 0° to 255°, with a spacing of 45°. The drive method is an 'A' type direct connection transmission system.

　　Main uses:

　　1. Used in drying fields, boiler industry, cleaning industry, painting industry, and food drying fields.

　　2. The application temperature is between 100℃ and 180℃.

　　3. The transported gas can be air or other non-flammable, non-toxic, non-corrosive gases that are harmless to human health and resistant to corrosion for steel materials. It can be used to transport non-corrosive, non-flammable, non-viscous hot air, steam, and smoke in various industries. Other similar characteristics can also be used, but the transport medium's environmental temperature must not exceed its stable environmental temperature.

　　4. The gas must not contain viscous chemicals, and the dust and hard particles must not exceed 150mg/m3. If the dust content is high, a dust removal system with at least 85% efficiency must be installed before the centrifugal fan to reduce the dust content entering the fan, thereby extending the service life of the centrifugal fan.

　　What is the fault analysis and solution for high-temperature fans?

　　1. Common faults through

　　After the new shaft is repurchased and installed, the company replaced the centrifugal impeller group of the high-temperature fan on the 2 subway line and put it into operation. As the operating time passed, the vibration value of the fan bearing seat gradually increased, with the original vibration value and condition showing a tendency to further increase. The vibration and temperature measurement data after the centrifugal impeller group replacement

　　2. Fault phenomenon analysis

　　During the on-site disassembly

　　when inspecting the centrifugal impeller, it was noted that the centrifugal impeller was fastened with 4.8 grade, 70mm long anchor bolts. After analysis by the manufacturer and the company's technical personnel on-site, it was determined that the anchor bolts did not meet the precision grade and needed to be replaced with 8.8 grade, 90mm long anchor bolts. It was also analyzed that excessive vibration might be caused by insufficient interference fit between the centrifugal impeller and the machine spindle.High-temperature fan3. Fault elimination strategies

　　(1) After stopping the kiln and halting material flow, immediately disassemble the precision positioning end and free end bearing end cover of the high-temperature fan, check and measure the radial expansion of the centrifugal fan spindle bearing, and check the clearance between the outer ring of the bearing and the bearing seat, while keeping data records.

　　(2) Remove the protective cover of the coupling, loosen the coupling, and check and record the parallelism of the motor and centrifugal fan spindle bearing (including axial and end face runout).

　　(3) Open the maintenance door of the centrifugal fan shell, remove the dust accumulated on the surface of the centrifugal impeller and inside the shell, and eliminate the vibration caused by dust accumulation.

　　(4) Based on the on-site measurement data, recalibrate.

　　(5) Perform dynamic balancing on-site for the centrifugal impeller to ensure that when the fan speed is at 40Hz (800r/min), the vibration value is within the normal range of 2.5mm/s.

　　(5)当场对离心叶轮做动平衡，使之达到风机转速在40Hz(800r/min)时，振动值在2.5mm/s的正常值范围内。