Section: Week 21-23: LO 4 Understand power transmissions, principles of operation and failure patterns of GEAR DRIVES | EAL Level 3 QET3/029 Maintenance of mechanical systems 23-24 | Grŵp NPTC Group Moodle

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  • GENERAL COURSE INFORMATION

    Here you will find documents and information regarding the course overall.

    • QET3/029 Maintenance of Mechanical Systems

      This section contains useful information for the unit and covers six learning outcomes:

      LO 1 Understand the maintenance function

      LO 2 Understand lubricants and lubrication systems
      LO 3 Understand bearing operations, types, materials and causes of failure
      LO 4 Understand power transmissions, principles of operation and failure patterns
      LO 5 Understand seals and sealing principles
      LO 6 Understand and use dismantling and re-assembly techniques

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    • Staff and Contact Details

      Unit 029 will be delivered by Ian Griffiths
       
      Email is ian.griffiths@nptcgroup.ac.uk

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      Ian Griffiths will be contactable during 9am to 4:30pm Mon to Friday

Week 21-23: LO 4 Understand power transmissions, principles of operation and failure patterns of GEAR DRIVES

  • Week 21-23: LO 4 Understand power transmissions, principles of operation and failure patterns of GEAR DRIVES

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    29.4 Understand power transmissions, principles of operation and failure patterns of 

    GEAR DRIVES

    Lesson Objectives

    • To discover the principles of operation: tooth profiles, cross-sectional shape, number of teeth, generation of the involute form, the geometry of gears, pressure angles, terms of circular gear geometry, backlash, diametrical pitch and speed relationship between two mating gears
    • To identify the Types and arrangements of gears: bevel gears, plain, spiral, hypoid, helical, spur, worm
    • To explore the maintenance requirements of gears: alignment, lubrication and condition
    • To examine the operating symptoms: noise, overheating and vibration
    • To recognise the symptoms of gear failure: corrosion, link seizure, wear and galling
    • To determine the causes of failure: out of alignment, out of parallel, out of plane and contamination
    • To look at the lubrication of gears: moisture, out of mesh and overload




    • Video 1:
      Here is a video showing the different types of gears widely used in industry.

        
    • Here is very useful information on all you need to know for gear drives that covers the criteria for the unit.

    • Here is a PowerPoint on an introduction to gears and the engineering formulas associated with them

    • Here is a gear ratio worked example number 1
    • Here is a gear ratio worked example number 2
    • Please complete examples 1 to 6
    • Activity 2

      Please watch the video 2 on how to work out gear ratios and velocities that will help you further on to answer the worksheet. Please complete the Compound Gear worksheet.
    • Video 2:
      Here is a video showing you how to work out the velocity and gear ratios of compound gear trains
       
    • Please complete the Compound Gears Worksheet.