Elevator Mechanic Study Guide

ELEVATORS ( MECHANICAL EQUIPMENT) Two types of Elevators ans-Electric & Hydraulic Electric Elevator ans-Cables, tall buildings, DC motor operated Requires electrical room Hydraulic Elevator ans-Plunger, antennaeic, movable rod 5 - 10 storeys Elevator Traction Machines ans-Gearless & Geared Gearless Traction Machine ans-Spun and worm - high-rise buildings Geared Traction Machine ans-Gear and worm - mid-rise buildings Electric Elevator Major Parts ans-1. Car/Cab - load carrying unit 2. Cable - rope; 4-6 in no. 3. Drive machine - power unit 4.Counterweights - balances weight/40% of capacity load 5. Guide rail - bracket 6. Shaft/Hoistway - hatchway/hatch 7. Penthouse - machine room above hoistway 8. Elevator pit - from sill level of the lowest landing (0.60 nakabaon) 9. Control equipment - electrical panel Electrical Elevator Other Parts ans-1. Control Panel - electrical panel; controller 2. Motor Generators (motor control)/ Generator Field Control - governs acceleration, speed, retardation, stopping of elevator 3. Guide shoes 4. Compensating chain - welded-link chain for hoist rope weight compensation 5. Buffer - stops descending car or counterweights beyond normal limit of travel 6. Governor - mechanical speed control mechanism 7. Secondary sheave - pulley on a gearless machine 8. Safety - large clamp, anchors the car to the building 9. Limit Switched 10. Operating Device Spring Buffer ans-Hydraulic elevators Oil Buffer ans-Electric elevator Hydraulic Elevator Major Parts ans-1. Car/Cab