WTT 133 - Wind Turbine Mechanical Sys

Credits: 3
Lecture Hours: 2
Lab Hours: 2
Practicum Hours: 0
Work Experience: 0
Course Type: Voc/Tech

Course includes the nomenclature and terms common to metals and metallurgy. Instruction will also include gears and gear failure analysis techniques, gear structures, inspection of gears and analysis of lubricants. Course includes discussion of the application of lubricants and proper procedures for acquiring lubricant samples and the effects of friction, gear damage and wear.
Prerequisite: WTT 103
Competencies

Discuss extracting metals from ores
1. Examine various mining methods
2. Examine various extraction methods
Explain basics of casting metals
1. Discuss casting methods
2. Discuss forging and other methods to form metals
Discuss physical and mechanical properties of metals
1. Examine atomic and crystalline structure of metals
2. Examine classification of iron alloys
3. Define applicable metallurgical terms
Describe manufacturing of various steel products
1. Explain Heat-Treating
2. Explain hardening of steels.
3. Explain Annealing, Normalizing, Hardening, Tempering of Steels
Discuss gears and gearboxes
1. Define gear failure
2. Demonstrate understanding of gear tooth nomenclature
3. Identify gears and gear sets.
4. Examine mechanisms of common gear failure
Define gear failure analysis
1. Discuss how to analyze gear failures
2. Define the rules of gear failure analysis
Examine common types of gear overload and fatigue
1. Determine brittle / ductile fractures from overload
2. Determine plastic deformation / cold flow from overload
3. Determine bending fatigue
4. Determine Hertzian fatigue
5. Define micro pitting, macro pitting / spalling.
6. Define subcase fatigue
Examine identification of gear wear and proper adjustments
1. Discuss general wear.
2. Discuss types of polishing and prevention of polishing
3. Understand various aspects of cracking and prevention techniques
4. Demonstrate recording gear tooth contact patterns with soft marking compound
5. Demonstrate recording gear tooth contact patterns with DYKEM
6. Demonstrate recording gear tooth contact patterns with graphite paper
7. Demonstrate recording gear tooth contact patterns with contact tape.
8. Demonstrate surface replication with dental cement
9. Understand basics principle of gear failure photography
Understand common fasteners and their uses
1. Identify common types of fasteners
2. Identify bolt size, hardness, thread spacing and pitch
3. Understand causes of metal corrosion
4. Understand techniques of corrosion prevention
5. Demonstrate proper fastener torque techniques
Understand properties and uses of applicable lubricants

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