Presentation on theme: "How The Elevator Works By Joseph Mackay Plaxco The University of the South Sewanee, TN 37383."— Presentation transcript:
How The Elevator Works By Joseph Mackay Plaxco The University of the South Sewanee, TN 37383
Why? I find the elevator “cool.” Phobia when younger Gets people to destinations fast. Large cities wouldn’t be the same.
Different Types Freight Elevators Stage Elevators
The Basic Design The basic design is a compartment that is somehow lifted Two Types of Elevators: HydraulicHydraulic Rope-GearedRope-Geared
The Hydraulic Elevator The car is moved up and down using “a fluid piston mounted inside a cylinder” (Harris). Consists of three parts: TankTank PumpPump ValveValve
Hydraulic Elevators A Closer Look The car is placed on a piston. Fluid Pumping System A tank (off to the side) holds the fluid. When the valve closes, the car is lifted. When the valve opens, the car is lowered.
Diagram of Hydraulic Elevator The following link is from the website “How Stuff Works” written by Tom Harris. How Elevators Work - HydraulicHow Elevators Work - HydraulicHow Elevators Work - HydraulicHow Elevators Work - Hydraulic
Hydraulic Disadvantages Two Disadvantages Must Have Enough RoomMust Have Enough Room Energy InefficientEnergy Inefficient
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. The counterweight system serves as a means for conserving energy.
Rope-Geared Design (Cont’d) Rails are used to guide the elevator Keep elevator and counterweights steady. Rope-geared elevators are much more efficient and safer.
Diagram of Rope-Geared Elevator The following link came from the “How Stuff Works” webpage written by Tom Harris Rope-Geared Elevator DiagramRope-Geared Elevator DiagramRope-Geared Elevator DiagramRope-Geared Elevator Diagram
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.
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. Press the floor you want in the lobby. Load Sensor