ppt - elevator

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