Knowledge! Induced draft fan performance characteristics and application range

Induced draft fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and induced draft of boilers and industrial furnaces; cooling and cooling in air conditioning equipment and household appliances. Ventilation; grain drying and sorting; wind tunnel

Wind source and hovercraft inflation and propulsion, etc. The working principle of the induced draft fan is basically the same as that of the turbine compressor, except that due to the low gas flow rate and small pressure change, there is generally no need to consider changes in the gas specific volume, that is, the gas is treated as an incompressible fluid.

Wear-resistant ceramic fans and impellers refer to the main flow-passing components in the fan, including the fan impeller, volute, air inlet and outlet, air damper, piping system and other severely worn parts, which are compounded with a layer of wear-resistant ceramics, while using the three-source flow theory , for impeller shape and casing

A fan equipment with high wear resistance or new functions formed after optimized design. The wear-resistant fan uses new fan design technology, ceramic-metal composite manufacturing technology, polymer composite ceramic technology, vacuum pasting technology, cold welding and gas shielded welding technology, and wireless

Damage detection technology and surface layer make the product have the most advanced technology level.

Performance features:

Since the hardness of the composite ceramic layer on the working surface of the fan impeller is HRA ≥ 86 (toughened alumina composite material), secondary sintered silicon nitride toughened ceramics or zirconia toughened alumina ceramics are used in areas with severe local wear, which can reach a maximum of HRA94 or above. It is resistant to particle erosion

The wear performance is at least 5 times higher than conventional treatment methods such as ordinary tungsten carbide surfacing, spray welding and alloy powder block welding, and more than 100 times higher than the base 16Mn steel; the ceramic sheet with a thickness of 1.5mm has been actually used for five years. The average wear is less than 0.2mm.

Application scope:

Wear-resistant fan impellers have a wide range of uses. The range of use is mainly determined according to the working temperature of the fan and is not affected by the wear medium. According to different working temperatures, the use range of wear-resistant ceramic fans is divided into three areas, namely:

Normal temperature working range: The temperature is below 120 degrees Celsius, using conventional polymer composite technology. Medium temperature working range: The temperature is between 120 and 180 degrees Celsius, using high-temperature resistant polymers and cold welding technology. High temperature working range: The temperature is between 180 and 380 degrees Celsius, using ceramic- metal welding

Connect + high temperature resistant polymer material technology.