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A Technical Seminar On Elevator
Presented by
N. samuel
Mechanical
09C81A0338
ELEVATOR
Elevator is a platform or a compartment housed in a shaft for raising and lowering people or things to different floors or levels.
TWO TYPES OF ELEVATORS
Hydraulic Rope-Geared
HYDRAULIC ELEVATORSWORKING
Fluid Pumping System. The car is placed on a piston. A tank (off to the side) holds the fluid. When the valves are closed, the car is lifted. When the valves are opened, the car is
lowered. The car is moved up and down using “a fluid
piston mounted inside a cylinder.”
HYDRAULIC ELEVATORBASIC LOOK
Consisting parts:
• Cylinder• Piston• Fluid reservoir• Rotary pump• Valve• Hydraulic fluid
HYDRAULIC DISADVANTAGES
Two Disadvantages
Energy Inefficient.
Chances of damage of tank ,whenever continuously heavy load is being applied.
ROPE-GEARED ELEVATORS
These are the most popular types of elevators.
Rather than being pushed from below, these types of elevators are moved using cables.
ROPE-GEARED DESIGN
Cables attach to the car and through a sheave. The sheave is connected to an electric motor. Motor turns one way, elevator moves up.
Motor turns the other way, elevator moves down.
The ropes are connected to a counterweight.
ROPE-GEARED DESIGN
Rails are used to guide the elevator.
Keep elevator and counterweights steady.
Rope-geared elevators are much more efficient and safer.
DIFFERENCE
SAFETY SYSTEMS
More ropes than needed.
Built-in brake systems.
Governor prevents the elevator from falling to the bottom of the shaft.
Automated Brake System at the top and bottom of the shaft.
TECHNOLOGY USED IN ELEVATORS
Modern elevators use computers.
Press the floor you want in the lobby(manual operators).
Load Sensor.
CONCLUSION
It is time being. Reduce man effort. It is an example for luxurious life of human
kind. Very helpful for patients in hospitals and old
aged persons as well as handicapped. Lifting loads and material in constructions.
Thank u