mechanical gears and energy transfer technology 8
TRANSCRIPT
![Page 1: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/1.jpg)
Mechanical Gears and Energy Transfer
Technology 8
![Page 2: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/2.jpg)
What is energy?
• Energy is the ability to do work.
• Energy can be– Kinetic- the energy of motion.– Potential- “waiting” energy.
![Page 3: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/3.jpg)
Kinetic and Potential Energy
![Page 4: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/4.jpg)
Some Types of Energy
• Chemical (food energy)
• Light (solar)
• Electrical (electrons moving through wires)
• Mechanical (movement of objects)
• Nuclear (energy in nucleus of an atom)
![Page 5: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/5.jpg)
First Law of Thermodynamics
• Energy cannot be created nor destroyed.
• Energy can be transferred.
![Page 6: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/6.jpg)
Mechanisms
• Can be used to change energy by transferring its direction, speed, type of movement and force or torque.
• Common mechanisms are:– Bicycle– Eggbeater
• Mechanisms can work alone, in pairs, or systems.
![Page 7: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/7.jpg)
Gears
• Gears redirect the applied force so that mechanisms can accomplish their tasks.
• Gears come in all sizes.
• Some gears are covered, some aren’t.
• Some require a lot of maintenance, some very little.
![Page 8: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/8.jpg)
Input
• Each mechanism has an initial force which starts the “working process”.
• This is the input.
![Page 9: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/9.jpg)
Output
• The motion and force which occurs as a result of the input.
![Page 10: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/10.jpg)
Uses of gears
• Gears or pulley systems allow a change in speed, torque, force, type of movement and direction.
• This is a common problem in automobiles, airplanes, robots and mechanical tools.
![Page 11: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/11.jpg)
Force
• That which causes an object with mass to accelerate.
![Page 12: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/12.jpg)
Torque
• A force that causes a rotation around a central point, such as an axis.
![Page 13: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/13.jpg)
Relationship Between Torque and Speed
• There is an “opposite” relationship between torque and speed.
• Increase in torque means decrease in speed.
• Decrease in torque means increase in speed.
![Page 14: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/14.jpg)
Calculating Gear Ratios
• Gear Ratio = # of teeth on output gear / # of teeth on input gear
• As the size of the driven gear decreases in relation to the size of the driving gear, output speed increases.
• As the size of the driven gear increases in relation to the driving gear, output torque increases.
![Page 15: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/15.jpg)
![Page 16: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/16.jpg)
![Page 17: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/17.jpg)
Hand Mixer: Crown & Pinion Gear
![Page 18: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/18.jpg)
Electric Motor: Gear Train
![Page 19: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/19.jpg)
Antique Jack: Bevel Gear and Worm Gear
![Page 20: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/20.jpg)
Ice Cream Scoop: Rack & Pinion
![Page 21: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/21.jpg)
Paper Transport Rollers Simple Gear Train with Idler
![Page 22: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/22.jpg)
Stapler: Multiple Mechanisms
![Page 23: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/23.jpg)
Toy Telephone: Rack & Pinion
![Page 24: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/24.jpg)
Rearview Mirror Motors: Rack & Pinion
![Page 25: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/25.jpg)
Fishing Reel: Crown & Pinion
![Page 26: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/26.jpg)
Electric Mixer: Worm & Wheel
![Page 27: Mechanical Gears and Energy Transfer Technology 8](https://reader035.vdocument.in/reader035/viewer/2022062314/56649eec5503460f94bfe1d6/html5/thumbnails/27.jpg)
Food Processor: Planetary Gears