A fan that vibrates on its foundation has a negative effect on the whole process – the inspections we carry out for our customers increase the reliability and availability of the installation
Fans inspections on location
Van Meer advises a full electrical and mechanical investigation during a fan inspection. The condition of the different components is controlled and assessed to be able to provide the right advice and the necessary support for a fan overhaul, maintenance or repair.
Visual inspection of the fan
During a visual check of the equipment we check the condition of the impeller for corrosion and soiling. The condition of the dampers, the bearing blocks, the shaft and the clutch tooth are also checked. The control and analysis of lubrication (e.g. excess lubricant) is also an important aspect. Finally, the fan housing is checked for cracking, and a wall thickness measurement can take place.
Vibration and spectrum analysis of fans
A condition measurement is carried out on the different components: the fan, the bearing blocks and electric motor. It is checked whether there is mechanical (starting) damage such as wear, imbalance, bearing damage or alignment faults.
Electrical measurement of an electric motor
The electrical measurement of the motor identifies electrical anomalies in the motor part:
- Deviation in phases, insulation value within tolerance
- Earth faults
- Presence of moisture in the motor
Control of fan alignment
At the start of the inspection an as-found alignment of the motor with the fan will be carried out. In so doing, aspects including the wearing of coupling, seals and rubbers can be detected, as can any loss of energy due to increased friction. When the equipment is presented for overhaul, the as-found alignment can be used for correct positioning and alignment again (as-left).
An impeller balance check prevents any imbalance from occurring. If too great imbalance is established, the fan must be balanced. In the first instance the impeller must be thoroughly cleaned, before balance weights are applied to reduce the imbalance to a minimum.
Fan inspection result
The full inspection creates a clear separate picture of each item of equipment (electric motor – bearing (blocks) – shaft – coupling – fan) and of the equipment in its entirety (fan unit). Depending on the results it can be specifically determined what concrete action is required to have the equipment work optimally and reliably as a whole. This can for example be balancing, an overhaul or a repair at our workplace. A clear report with photos and explanation is also always supplied and discussed.