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Power Transmission

SKMT 151

Power Transmission

SKMT 151

Course Description

Prerequisite: MATH LEVEL 5. Identifies and explains safety rules, regulations, test procedures, installation, removal, and operation of belt drives, chain drives, mechanical couplings, and mechanical drive systems. Demonstrates the concepts of shaft alignment. Credit may be earned in SKMT 151 or MT 151 but not both. (30-15)

Outcomes and Objectives

Understand the principal functions of all the various mechanical power transmission components used on industrial machinery. Components may be individual parts or assembled units.

Objectives:

  • 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.
  • Analyze the components or failures of the power transmission units or parts.
  • Determine the causes related to the failure of proper machine performance.
  • Visualize the procedures required to repair or replace assemblies or components that have failed.
  • Recognize the "wear" patterns causing the machine failures.
  • Assess failure mechanisms.

Use "tools of the trade" to remove all parts or assemblies associated with a machine failure.

Objectives:

  • Use common hand tools to assemble mechanical components.
  • Be familiar with the source of various machine failures and the parts needed to repair the failures.
  • Measure and calculate sizes for replacement of parts using tables of dimensions found in manufactured parts catalogs or the textbook used in class.
  • Communicate with others involved in failures other than "normal wear" (i.e. design overload, shock or any abnormal conditions).
  • Follow-up with periodic adjustments, vibration samples, lubrication schedules, etc. upon completion of repairs.

Understand the principal operation of mechanical power transmissions:

Objectives:

  • Evaluate the general characteristics and terms of chain and belt drives.
  • Evaluate the general characteristics and terms of clutches and brakes.
  • Explain proper machinery lubrication procedures.
  • Explain propoer maintenance procedures for bearings.
  • Align coupling using straight edge with feeler guage and dial indicator.
  • Interpret gear terms and mathematical relationships and compute spur gear ratios.
  • Evaluate the general characteristics and terms of shaft couplings.
  • Explain the operation of brakes and clutches.
  • Use various methods to perform shaft alignment.
  • Evaluate the general characteristics and terms of closed gear and variable speed drives.
  • Evaluate the general characteristics and terms of compound gear trains.
  • Evaluate the general characteristics and terms of worm and wheel gear trains.
  • Evaluate the general characteristics and terms of helical and bevel gears.
  • Explain the operation of planetary gear system.
  • Evaluate the general characteristics and terms of lever classes and compound levers.

Demonstrate proper safety techniques and proper use of personal protective equipment.

Objectives:

  • Demonstrate safety rules, regulations, test procedures, installation, removal, and operation of mechanical drive equipment.

Perform appropriate mechanical drive calculations.

Objectives:

  • Convert between metric and U.S. standard.
  • Perform calculations related to gears and gearboxes, chain drives, and belt drives.
  • Calculate rpm, gear ratios, and torques.

Identify types and specifications of fasteners and lubricants.

Objectives:

  • Identify types and specifications of fasteners used in wind turbines.
  • Demonstrate use of torque wrenches.
  • List effects of torque, lubricants, hydraulic bolt stretchers, tensioners, and high torque on fasteners.
  • Identify type, application, and compatibility of lubricants.
  • Explain proper machinery lubrication procedures.
  • List effects of lubricants and tensioners on fasteners.

Learn and practice shaft alignment methods.

Objectives:

  • Understand alignment fundamentals including typical terminology and principles.
  • Use various methods to perform alignment and practice the presented alignment techniques in supervised lab workstation exercises.
  • Align coupling using the following methods: straight edge with feeler gauge and dial indicator.
  • Evaluate the general characteristics and terms of shaft couplings.
  • Review Alignment Best Practices: Tolerances & Standards; Typical Challenges.
  • Explain proper maintenance procedures for bearings.

Understand the principal function of rolling element bearings.

Objectives:

  • Explain function of a bearing, components, terminology, and types of rolling element bearings.
  • Explain proper maintenance procedures for bearings.
  • Explain factors affecting the performance of rolling element bearings
  • Explain bearing numbering system and significance of prefix and suffix characters.
  • Demonstrate proper bearing mounting and dismounting procedures.
  • Explain importance of proper lubrication and proper lubrication practices.
  • Explain causes of bearing failure.