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Maintenance of Mechanical System, Used to provide variable output speed…
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Used to provide variable output speed from a constant speed power source or to provide torque increase for a variable speed power source as in automobile.
1) geared Transmission - Provides specific fixed type rations
2)Belt drives - Provide flexibility in the positioning of the motor
3)Chain drives - Provide infinitely variable speeds
4)Traction Drives - Provides adjustable speed with relatively high speed
- Mechanical drives are less costly than electrical drives, control more simpler.
2.Used in aerospace to mining and heavy industries.
3.Advance technology, more efficient.
Not durable and cannot be controlled as precisely as electrical drives. Cannot transmit power as electrical drives when variable speed is essential
This drives have internal spaces that have void space where residues can be deposited. Need to be cleaned at regular intervals. Clean-in place (CIP) method to clean the void space in the drive.
Device used to move fluids (liquids, gases, slurries)
Advantages -High speed
-High Pressure
-Relatively quiet operation
-Can use variety of materials.
Disadvantages
-No solid allowed
-Fixed end Clearances.
Applications
-various feul oile and lube oil
-chemical additive and polymer metering
-low volume transfer
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Advantages
-Excellent for high-viscosity liquids
-Operates well in either direction
-Single adjustable end clearance
-Easy to maintain
Disadvantages
-requires moderate speeds
-medium pressure limitations
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Advantages
-no metal-to-metal contact
-Non-pulsating discharge
-Pass medium solids
-long term dry run
Disadvantages
-required timing gears
-reduced lift with thin liquids
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Advantages
-handles thin liquids at relatively higher pressures
develops good vacuum
-compensates for wear through vane extension
-can run dry for short periods
Disadvantages
-complex housing and many parts
-not suitable for high pressures
Application
-aerosol and propellants
-aviation service- fuel transfer, deicing
-solvents
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Preventive Maintenance
-Obtain a hydraulic fluid sample
-Filter hydraulic fluid
-Clean the inside of a hydraulic reservoir
Check and record pump flow