Title: How The Elevator Works 1 How The Elevator Works • By Joseph Mackay Plaxco • The University of the South • Sewanee, TN 37383 2 Why? • I find the elevator cool.

• Phobia when younger • Gets people to destinations fast. • Large cities wouldnt be the same. 3 Different Types • Freight Elevators • Stage Elevators 4 The Basic Design • The basic design is a compartment that is somehow lifted • Two Types of Elevators • Hydraulic • Rope-Geared 5 The Hydraulic Elevator • The car is moved up and down using a fluid piston mounted inside a cylinder (Harris). • Consists of three parts • Tank • Pump • Valve 6 Hydraulic ElevatorsA Closer Look • The car is placed on a piston. • Fluid Pumping System • A tank (off to the side) holds the fluid.

California State Funded Training Programs. • When the valve closes, the car is lifted. • When the valve opens, the car is lowered.

7 Diagram of Hydraulic Elevator • The following link is from the website How Stuff Works written by Tom Harris. • How Elevators Work - Hydraulic 8 Hydraulic Disadvantages • Two Disadvantages • Must Have Enough Room • Energy Inefficient 9 Rope-Geared Elevators • These are the most popular types of elevators.

Types and Working Principle of Elevator - Download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online.

• Rather than being pushed from below, these types of elevators are moved using cables 10 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. • The counterweight system serves as a means for conserving energy.

11 Rope-Geared Design (Contd) • Rails are used to guide the elevator • Keep elevator and counterweights steady. • Rope-geared elevators are much more efficient and safer. 12 Diagram of Rope-GearedElevator • The following link came from the How Stuff Works webpage written by Tom Harris • Rope-Geared Elevator Diagram 13 Safety Systems • More ropes than needed • Built-in brake systems • Governor prevents the elevator from falling to the bottom of the shaft.

• Centrifugal force causes a brake system to activate. • Also has an electromagnetic brake that is activated if the elevator loses power. • Automated Brake System at the top and bottom of the shaft. • 14 Moving To Destinations • Modern elevators use computers. • Slows down • Only answer up calls as going up and the same for going down. • Modern Smart systems take into account the busiest parts of the day.