MT 151 - Power Transmission

1. Understand the principal functions of all the various mechanical power transmission components used on industrial machinery. Components may be individual parts or assembled units.
   1. Understand the principles of power transmission systems; recognize, remove and refit taper-lock bushes, keyed shafts, belts, chains & couplings; install & align shafts and tension drive train components.
   2. Analyze the components or failures of the power transmission units or parts.
   3. Determine the causes related to the failure of proper machine performance.
   4. Visualize the procedures required to repair or replace assemblies or components that have failed.
   5. Recognize the “wear” patterns causing the machine failures.
   6. Assess failure mechanisms.
2. Use “tools of the trade” to remove all parts or assemblies associated with a machine failure.
   1. Use common hand tools to assemble mechanical components.
   2. Be familiar with the source of various machine failures and the parts needed to repair the failures.
   3. Measure and calculate sizes for replacement of parts using tables of dimensions found in manufactured parts catalogs or the textbook used in class.
   4. Be able to communicate with others involved in failures other than “normal wear” (i.e. design overload, shock or any abnormal conditions).
   5. Follow-up with periodic adjustments, vibration samples, lubrication schedules, etc. upon completion of repairs.
3. Understand the principal operations of mechanical power transmissions.
   1. Evaluate the general characteristics and terms of chain and belt drives.
   2. Evaluate the general characteristics and terms of clutches and brakes.
   3. Explain proper machinery lubrication procedures.
   4. Explain proper maintenance procedures for bearings.
   5. Align coupling using the following methods: straight edge with feeler gauge and dial indicator.
   6. Interpret gear terms and mathematical relationships and compute spur gear ratios.
   7. Evaluate the general characteristics and terms of shaft couplings.
   8. Explain the operation of brakes and clutches.
   9. Use various methods to perform shaft alignment.
   10. Evaluate the general characteristics and terms of closed gear and variable speed drives.
   11. Evaluate the general characteristics and terms of compound gear trains.
   12. Evaluate the general characteristics and terms of worm and wheel gear trains.
   13. Evaluate the general characteristics and terms of helical and bevel gears.
   14. Explain the operation of planetary gear system.
   15. Evaluate the general characteristics and terms of lever classes and compound levers.
4. Demonstrate proper safety techniques and proper use of personal protective equipment.
   1. Demonstrate safety rules, regulations, test procedures, installation, removal, and operation of mechanical drive equipment.
5. Perform appropriate mechanical drive calculations.
   1. Convert between metric and U.S. standard.
   2. Perform calculations related to gears and gearboxes, chain drives, and belt drives.
   3. Calculate rpm, gear ratios, and torques.
6. Identify types and specifications of fasteners and lubricants.
   1. Identify types and specifications of fasteners used in wind turbines.
   2. Demonstrate use of torque wrenches.
   3. List effects of torque, lubricants, hydraulic bolt stretchers, tensioners, and high torque on fasteners.
   4. Identify type, application, and compatibility of lubricants.
   5. List effects of lubricants and tensioners on fasteners.