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Comment PDF Solids Handling

Gear Units In CPI Plants

By Amin Almasi Rotating Equipment Consultant |

Gear units play a critical role in a diverse array of chemical process industries (CPI) facilities, to match the speed of a selected driver with the speed of the driven equipment. Today, they are used extensively in pumps, turbines and compressors, in material-handling units (such as conveyers and stackers), and in other equipment, including mixers, kneaders and extruders. This article discusses high-power, high-speed gear units for large rotating machines and material-handling systems. These gear units can be used in the power range of 0.1–100 MW, with gear tip speeds usually between 20–200 m/s. The American Gear Manufacturers Assn.’s (AGMA) “Specification for High Speed Helical Gear Units (6011)” covers different aspects of high-speed gear units, such as the gear rating, lubrication, vibration, testing and others. FIGURE 1. In this conventional, double-helical gear unit (with a welded-steel casing), double-helical gears are used to minimize the axial load (that is, the load in the direction of the shaft). The complex casing was fabricated by welding David Brown   Large, high-speed gear units for CPI applications are usually…
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