Vibration diagnosis of the fan with the Schwingungsanalysator/Auswuchtgerät

Vibration diagnosis of the fan and dynamic balancing of impellers on site belong to the most important Tasks. With the new Schwingungsanalysator/Auswuchtgerät BALTECH VP-3470 the tasks easily and quickly solved.

Schwingungsparameter the fan hang by their construction, Installation, and use.

There are 2 main types of Fan: centrifugal and axial fans. A Kreisellüfter (so-called centrifugal fan) consists of an impeller, the in the Casing rotates. Usually the device the air into the housing in the axial The direction of rotation of the impeller and is to Laufradrand. The flow of air in Axiallüftern is to the Axle parallel arranged. Blades of the axial fan are usually profiled in cross-section and have a little game to Fan cover.

Blades of the impeller are so called because they are like airplane wings in cross-section profiled.

Thanks to its aerodynamic shape have profiled blades, the efficiency is approximately 90 %; this is the the most effective type of the blades of the respective Kreisellüfter.

Since their efficiency is so high is the fan with backward-curved (or profiled) blades large fans such as coal and Tunnels.

Blade of an impeller are usually hollow inside (otherwise, they would überschwer and expensive to operate). In Schaufelprofil can multiple edges, the hardness teach and the shape of the blades receive .

A step represents an angle between a Lüfterschaufel and an imaginary Flat, perpendicular to the shaft axis.

For example, are blades with the Zero-step parallel to the plane, which is perpendicular to the shaft axis. Blades of the fan with the 10o-step are under the 80o angle to the shaft axis and under the 10o angle to the plane, which is perpendicular to the shaft axis is arranged.

The Unbalance and misalignment are the most common mistakes of the fan.

Since Kreisellüfter often a relatively large diameter of the Wheels, imbalance is often a Problem. The imbalance shows up in the Spectrum as a peak (Harmonic) of the vibration on the rotation speed the fan, and usually in the radial direction. If the fan hits been balanced and unbalance recently emerged was, is it Deposits on the impeller or its damage. For this reason, is visual examination of the Lüfterlaufrads before the balancing is recommended. Very often allows for easy cleaning of the machine vibration level in standard.

Misalignment, Wälzlagerfehler, Screw Loosening, Resonance and curved waves belong to the errors, which are often in fans arise. All types of errors are with the Schwingungsdiagnosegeräten fan to detect the society BALTECH (e.g., Schwingungsanalysatoren CSI 2140 or BALTECH VP-3470) to be delivered.