Gearbox Housing Stiffness
Release Date:30/12/2015
The modal properties of gearbox housing were identified using operational deflection shapes and experimental modal analysis. The effect of the gearbox load on the vibration response of each gear in the time domain using synchronous averaging with the rotational frequency was analysed. The "power" can flow through the gearbox in many ways according to the gear used.
The gearbox housing, shafts, and gears are not an ideally rigid structure. The compliant gearbox structure is deformed under load. The tooth mesh of the R gear pair depends on the gear pair under load between the secondary and output shaft. The averaged vibration responses of the 3rd, 4th, and 5th gears under load are shown. The responses are differing due to the gearbox deformation.
To prevent uncertain tooth contact, the gearbox housing was stiffend by using ribs, inside the housing the ribs ware perpendicular to the shafts while two massive ribs at the housing surface were paralled to the shafts.The additional ribs ensure that the bearing close to the 21-tooth gear is stiffened enough and the vibration reponses were not differing any more.
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