Investigate the use of a larger motor or higher staring torque. Centrix gives a warning when the critical speedĮver had a start up problem? Centrix calculates the starting time and gives warnings alerting you to The shaftĬritical speed should always be higher than the fan running speed by a The higher the critical speed is and the larger the impeller overhangįrom the inboard bearing the lower the critical speed is. (arrangements 1, 2, 8, 9) the shorter the distance between the bearings If you have ever been unable toīalance a fan in service and it vibrates like crazy then you probably Shaft critical speed is easily calculated by Centrix. Also Arrangement 7 shaft and bearings can oftenīe used when an arrangement 8 shaft can't. The same fan could be direct coupled arrangement 8 with no problems due Not be suitable for belt drive because the bearings can't take the loadĪnd larger bearings can't be used because of rpm limitations. For example a particular fan selection may Volume and pressure that you can think of but the size or speed may notīe practical due to mechanical limitations (size outside the range orĪ) Impeller stresses - dependent on speed, temperature, thickness and material selection.ī) Casing thickness - dependent upon fan diameter, pressure and noise breakout.Ĭ) Shaft design - dependent upon impeller weight, belt or coupling load, motor torque, fan arrangement, temperature etc.ĭ) Bearing selection - dependent on shaft size and loads and rpm.Ĭ) Pedestal design - dependent on fan diameter, power and rpm.Ĭentrix selects a standard size of aerodynamic design and calculates all theĪbove factors (and more). The aerodynamic design is what gives a particular fan its volume, pressureĪnd power characteristics. H & R Resources can provide fan aerodynamic design criteria if required. These designs are usually provided by the purchaser. Centrix uses these proportions and designs a range of fans by manipulating the fan laws.Īerodynamic designs and a nominal range of sizes are entered into the program by The aerodynamic proportions must be known and entered into the Centrix database. Produces a handing specific General Arrangement drawing.
Produces Autocad cutting profiles for the main components.Įstimates the costs, areas, weights and labour hours. Produces detail and arrangement drawings.Īutomated Drawings generation saved as Autocad dwg files. Mechanically designs and calculates stresses. Selects fans from a range of designs to suit a volume and pressure.
This program does in a couple of minutes what an experienced fan engineer would take many hours to design and cost! Over View : To select, design, cost and quote fans for applications. Advanced Centrifugal Fan selection software.Ĭentrix is a centrifugal fan selection program that enables a fan manufacturer
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