2. Bearing failures have great impact on industry and economy. The bearing failures ocur because of...
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2. Bearing failures have great impact on industry and economy. The bearing failures ocur because of the inappropriate lubrication of the bearing rolling elements (approximately 80% of the cases), followed by inadequate bearing selection (10%), improper mounting (5%), indirect failure (4%), and material defects and manufacturing errors (less than 1%) *. Therefore the selection of the right bearing for the desired application area is so critical. Taking into consideration the below table; Select a bearing that will operate without noise under axial loads. Explain your reason. (15 points) Select a bearing that will be part of a long-term, maintenance-free ultra high speed rotor system. Explain your reason. (15 points) Bearing types Deep groove ball bearings Characteristics Load Carrying Capacity Axial load Radial load High speed High rotating accuracy Low noise/vitali Low friction torque" High rigidity Angular contact ball bearings *** Self- Thrust ball Thrust ball Cylindrical Spherical Needle Tapered aligning bearings bearings roller roller roller roller bearings bearings ball bearings with bearings seating ring thrust bearings 1 | A 17 (*Ciprian Radu, The Most Common Causes Of Bearing Failure And The Importance Of Bearing Lubrication Rkb Technical Review - February 2010) 2. Bearing failures have great impact on industry and economy. The bearing failures ocur because of the inappropriate lubrication of the bearing rolling elements (approximately 80% of the cases), followed by inadequate bearing selection (10%), improper mounting (5%), indirect failure (4%), and material defects and manufacturing errors (less than 1%) *. Therefore the selection of the right bearing for the desired application area is so critical. Taking into consideration the below table; Select a bearing that will operate without noise under axial loads. Explain your reason. (15 points) Select a bearing that will be part of a long-term, maintenance-free ultra high speed rotor system. Explain your reason. (15 points) Bearing types Deep groove ball bearings Characteristics Load Carrying Capacity Axial load Radial load High speed High rotating accuracy Low noise/vitali Low friction torque" High rigidity Angular contact ball bearings *** Self- Thrust ball Thrust ball Cylindrical Spherical Needle Tapered aligning bearings bearings roller roller roller roller bearings bearings ball bearings with bearings seating ring thrust bearings 1 | A 17 (*Ciprian Radu, The Most Common Causes Of Bearing Failure And The Importance Of Bearing Lubrication Rkb Technical Review - February 2010)
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Essentials of Investments
ISBN: 978-0078034695
9th edition
Authors: Zvi Bodie, Alex Kane, Alan Marcus
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