Maricopa Community Colleges  MWR204   19952-20046 
Official Course Description: MCCCD Approval: 11/22/94
MWR204 19952-20046 LEC 5 Credit(s) 5 Period(s)
Speciality Machinery II
Design, terminology, installation and operation of centrifugal and axial draft fans, monorail systems, steam turbines and generators. Layout and fabrication of monorail hangers, turns, and dips. Prerequisites: Indentured apprentice status or permission of the Apprenticeship Coordinator.
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MCCCD Official Course Competencies:
 
MWR204   19952-20046 Speciality Machinery II
1. Explain the operation of centrifugal and axial flow fans. (I)
2. Identify specific components, arrangements, and application of mechanical draft fans. (I)
3. Demonstrate installation procedures for mechanical draft fans including: handling, foundation preparation, rotor support installation, mounting and fitting bearings, and setting of shaft deflection. (I)
4. Describe fan rotation by housing configuration and wheel blade design. (I)
5. Demonstrate correct inlet vane and damper opening. (I)
6. Identify friction bearing types including application and components. (I)
7. List the procedures for fitting and aligning friction bearings. (I)
8. Identify linkage types and components and demonstrate methods of setting linkage travel and stroke. (I)
9. Describe the types of rotor unbalance and define related terminology . (I)
10. Identify specific sensing instruments and their functions. (I)
11. Explain specific methods of correcting rotor unbalance. (I)
12. Identify specific types of monorail systems and explain their function and application. (II)
13. Interpret monorail blueprints. (II)
14. Layout and fabricate monorail turns, dips and hangers. (II)
15. Identify specific steam turbines and list major turbine components. (III)
16. Describe the expansion sequence for typical condensing type turbines and explain the means of alignment control. (III)
17. Describe the installation sequence of typical turbines. (III)
18. Identify components of typical turbine diaphragms and explain maintenance seals, fits and clearances. (III)
19. Identify the types of steam seals and explain their application. (III)
20. List the components of turbine bearings. (III)
21. Given a sample problem, align a journal bearing. (III)
22. Identify specific valves used in condensing type turbines and explain their function. (III)
23. Describe the basic operating principles for two-pole and four- pole generators. (IV)
24. List the installation sequence for typical generators including the major generator components and internal components. (IV)
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MCCCD Official Course Outline:
 
MWR204   19952-20046 Speciality Machinery II
    I. Mechanical Draft Fans
        A. Definition and Purpose
        B. Types and Operation
          1. Centrifugal Flow Fans
          2. Axial
        C. Applications
          1. Commercial and Heavy Industrial
          2. Types of Medium
        D. Arrangements
          1. Scroll Housing - Housing Configuration
          2. Bearing Pedestals
        E. Typical Components
          1. Nomenclature
          2. Basic Functions
        F. Installation
          1. Handling and Precautions in Rigging Procedures
          2. Foundations
          3. Scroll Housing
          4. Rotor Supports (Pedestals and Sole Plates)
          5. Rotor and Inlet Vanes and Dampers - Wheel Blade Design
        G. Auxiliary Components
          1. Friction Bearings
          2. Linkage for Dampers and Vanes - Types/Components/Stroke
        H. Balancing
          1. Types of Unbalance - Shaft Deflection
          2. Terminology
          3. Sensing Instruments and Functions
          4. Balancing Procedures
      II. Monorails
          A. Types
            1. I-Beam
            2. Flat Rail
            3. T-Beam
            4. Double Channel
            5. Twin Section
            6. Enclosed
            7. Power - Free
          B. Accessories
            1. Take-Ups
            2. Turns
            3. Switches
            4. Load- Carriers and Trolleys
            5. Lift Sections
            6. Drivers
            7. Chain
          C. Installation
            1. Blueprints
            2. General Layout - Plan drawings
            3. Superstructure Header Layout
            4. Dips, Turns and Take-Ups Layout
        III. Steam Turbines
            A. General Overview
              1. Arrangement
              2. Major Components Nomenclature
            B. Turbine Expansion
              1. Sequence of Expansion
              2. Alignment Control
            C. Nozzles and Buckets
              1. Converging / Diverging Nozzle
              2. Impulse Buckets
              3. Reaction Buckets
            D. Stages
              1. Pressure Stage
              2. Velocity Stage
              3. reaction Stage
            E. Foundation
              1. Condenser Opening Check
              2. Anchor Bolt Pattern Check
            F. General Installation Sequence
              1. Foundation Preparation
              2. Soleplate and Standards Installation
              3. Grouting
              4. Low Pressure Exhaust Hood
              5. Low Pressure Internals Assembly
              6. High Pressure / Reheat Assembly
              7. Coupling Alignment
              8. Oil Flush
            G. Diaphragms
              1. Terminology
              2. Seals/Fits/Clearances
              3. Support Bars
            H. Steam Seals
              1. Types and Application
              2. Gland Steam
              3. Steam Seal Clearance
            I. Bearings and Components
              1. Spherical Seated - Journal Bearings
              2. Thrust Bearing Types
              3. Aligning
            J. Valve Types and Functions
              1. Main Steam Stop (ms)
              2. Control Valves (cv)
              3. Reheat Stop (rs)
              4. Reheat Intercept (ri)
              5. Gland Blowdown (bd)
              6. Extraction Non- Return (nr)
            K. Governors - Functions
              1. Controls Shaft Speed and Steam Pressure
              2. Types
              3. Overspeed Trip - Centrifugal
              4. Low Vacuum Trip
              5. Rupture Diaphragms
              6. Selenoid Trip
              7. Thrust Trip
          IV. Generators
              A. General Arrangements and Basic Operating Principles
                1. Terminology
                2. Two and Four Pole Generators
                3. Components and Terminology
              B. Installation
                1. Stator
                2. Rotor
                3. Internal Components
                4. Excitation
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