Views: 0 Author: Site Editor Publish Time: 2022-03-28 Origin: Site
1. Radial and axial clearances between the air inlet bell and the impeller inlet The radial and axial clearances between the air inlet bell and the impeller inlet generally have strict requirements. Because if the gap is too small, the fan will vibrate during operation; but if the gap is too large, it will affect the efficiency of the fan. Therefore, the gap should be appropriate, neither too small nor too large.
2. Concrete foundation Concrete foundation problems are mainly loose or damaged. The reason may be that the vibration of the bearing seat is too large, so that the anchor bolts are loose or broken, which in turn makes the foundation loose or damaged. To solve this problem, you can increase the contact area between the bearing seat and the lower foundation, or reduce the force strength per unit area of the foundation, but the latter is more commonly used and relatively simple to operate. method.
3. The problem of partial fracture of the bearing seat is mainly caused by the excessive vibration of the fan, or the severe wear of the fan blade and the fall off. If you want to solve it, you can only replace the bearing seat, so that it can be completely.
The centrifugal fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and induced draft in boilers and industrial furnaces; cooling and in air conditioning equipment and household appliances. Ventilation; drying and selection of grain; air source of wind tunnel and inflation and propulsion of hovercraft, etc.
The wear of the transmission parts of the centrifugal fan is a common equipment problem, including the bearing position of the exhaust fan, the wear of the bearing chamber, and the wear of the bearing position of the blower shaft. For the above faults of centrifugal fans, traditional maintenance methods include surfacing, thermal spraying, electric brushing, etc., but they all have certain drawbacks: the thermal stress generated by the high temperature of repair welding cannot be completely eliminated, which is easy to cause material damage, resulting in bending or breaking of components; However, the brush plating is limited by the thickness of the coating, which is easy to peel off, and the above two methods use metal to repair the metal, which cannot change the "hard to hard" cooperation relationship. Worn again. Contemporary western countries mostly use the repair method of polymer composite materials to solve the above problems, and the most widely used is the American Fushilan technology system, which has comprehensive properties such as super adhesion and excellent compressive strength, and can be disassembled and machine-free. processing. There is no thermal stress of repair welding, and the repair thickness is not limited. At the same time, the metal material of the product has no concession, which can absorb the shock and vibration of the equipment and avoid the possibility of re-wear. It is used in the domestic application of centrifugal fan fault repair. It also gradually replaces traditional methods.
