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Centrifugal fans for large power-plant and heavy-industrial applications are critical elements in the operation of the entire facility. It is, therefore, important to insure a long and safe operating life [...]

Industrial plants throughout the world rely on critical process fans for operation, but what happens when a fan rotor, with a wheel rotating at a peripheral speed of 450 mph, [...]

The way in which the natural frequencies of the industrial fan components may be measured is discussed. It is pointed out that this measurement is really important.

Build-up on kiln induced draft fans has increased due to design changes in processes. The residue, which is very hard and layered, breaks up unevenly. This imbalance causes vibration, resulting in shutdown to prevent possible bearing failure. This is a frequent occurrence and consequently maintenance costs are increased. Combinations of reducing temperature, oversizing shafting, rotors designed for smooth flow are recommended.

Power generation plants throughout the world rely on critical process fans for operation. But what happens when a fan rotor, with a wheel rotating at a peripheral speed of 450 [...]

The component parts of large industrial fan propellers have natural resonant frequencies. If these get excited during operation, they may cause vibratory stress & fatique, which might result on the cracking or destruction of certain components. One test to measure the vibration response of components is called the impact (or impulse) excitation technique. An acclelerometer is attached to 1 face of a metal component, while an impact hammer hits the component on the opposite end.

Les Gutzwiller(*) expounds on the advantages of centrifugal fans for longwall ventilation, and for use in coal preparation plants Mining practices and the industry's fan application problems have changed dramatically [...]

Mining and aggregate processing plants throughout the world rely on critical process fans for operation. So what happens when a fan rotor, with a wheel rotating at a peripheral speed [...]

Imbalance is a problem with all industrial fans including those used in the aggregate industry. Imbalance is a potentially dangerous condition and can result in breakdowns and costly plant shutdowns. [...]

Fans play a key role in most manufacturing processes by recirculating air, ventilating hazardous gases, and cooling machinery. One problem that can develop in all of these applications is imbalance. [...]

Imbalance in industrial fans for pulp and paper processing can lead to failures, breakdowns, operations shutdowns, and vibration. Regular inspection and maintenance, which offer potential for preventing damage to other machines, can be done with the use of proximity probes. The causes of industrial fan imbalance are also presented.

Several letters to the editor are presented including one about gospel news as well as providing care to elder patients and author Andrée Seu Peterson's view about biblical principles.

Provides information on vibration and imbalance in industrial fans. Common plant situations that can lead to imbalance includes build up of particulate matter on fan blades and differential temperatures between the top and bottom of the fan housing; Importance of clarifying the difference between imbalance and vibration; Components of a fan rotor; Suggestion on monitoring the health of a fan.