Lesson 1 - Mechanical Brakes and Clutches
Topics:
Installing mechanical clutches and brakes; Preparing shafting; Initial lubrication; Providing the power supply; Test running; PM; Safety
Learning Objectives:
– Explain how friction-type and jaw-type clutches differ in construction.– Name the precautions that should be taken when mounting body on a shaft.
– Explain how to test-run a mechanical clutch with no load.
– Explain how to install a mechanical brake.
– Describe the results of improper alignment between driving and driven shafts.
– Identify the problems that may be indicated by chatter and excessive noise.
Lesson 2 - Electric Brakes and Clutches
Topics:
Single- and multiple-disc friction clutch; Tooth-type, hysteresis, eddy-current, and magnetic particle clutch; Heat dissipation; PM; Wiring; Safety
Learning Objectives:
– Describe how single-disc and multiple-disc friction clutches operate.– Explain how the principle of hysteresis is applied in electric clutches.
– List the three basic components of magnetic particle clutch.
– Differentiate between the static torque, pickup torque, and average torque of a clutch.
– Identify the problems that may arise in a clutch if its heat is not dissipated.
– Define decay time, pull-in time, and response time.
Lesson 3 - Adjustable-Speed Drives
Topics:
Storage and protection of enclosed drives; Handling and leveling enclosed drives; Repairing shafting; Vibration; Lubrication; Test running; PM; Safety
Learning Objectives:
– List the precautions necessary to provide extra protection for open-type drives.– Describe how to install an enclosed-type drive on a concrete floor.
– Explain how to prepare the shafting when installing a new enclosed drive.
– Describe the initial lubrication of new adjustable-speed drives.
– Describe how to test-run an adjustable-speed drive under no load and full load conditions.
– Name some of the safety rules for working on an adjustable drive.
Lesson 4 - Fluid Drives
Topics:
Constant and variable-speed couplings; Torque converters; Coupling drive arrangements; Installing fluid couplings; PM, Safety
Learning Objectives:
– Explain how a fluid drive works.– Describe how constant-speed couplings differ from variable-speed couplings.
– Trace the fluid path through a torque converter using either a drawing or a cutaway.
– Describe the various ways of mounting a fluid coupling.
– Explain how to cool the fluid in large couplings.
– Discuss preventive maintenance procedures for couplings.
Lesson 5 - Complete Drive Systems
Topics:
Drive with coupling and roller chain, with two flexible couplings, and with right-angle shafts; Installation; PM; Troubleshooting; Safety
Learning Objectives:
– List the components used in a typical drive system.– Name the part of a drive system in which most of the speed reduction occurs.
– Describe the construction and operation of a shaft-mounted drive.
– List the protective devices for a drive.
– Explain the proper maintenance procedures for a drive system.
– Describe the steps to be taken when troubleshooting a drive system.
