Fluid Power ENGR 8 4 Lesson 2 Hydraulic

Fluid Power ENGR 8 -4, Lesson 2 Hydraulic and Pneumatic Systems Written by Roland Williams

Big Idea n ENGR-TS-3: The students will develop an understanding of how humans interact with systems.

Critical Knowledge/Elements a) Operate technological systems b) Maintain technological systems c) Constructing technological systems d) Design technological systems

Essential Question What are hydraulic and pneumatic systems?

Word Wall § § § Fluid Power Hydraulic Systems Pneumatic Systems Boyle’s Law § § § Pascal’s Principle Pressure Actuators Compressor Mechanical Advantage

Fluid Power Review What is a fluid power system? n What is the definition of a fluid? n

How does a fluid power system work?

Fluid power systems work by force being applied to a fluid (gas or liquid) , then the energy of the fluid, under pressure, transfers its energy to a mechanically device to perform work.

Pressure n The amount of force distributed over a unit of area, usually expressed in pounds per square inch. Pressure = Force (F) Area (A)

Boyle’s Law n The volume of gas varies as the pressure increases, whereas a liquid’s volume remains the same under pressure, provided the temperature remains constant.

Boyle’s Law 2 F Liquid

Pascal’s Principle n A pressure applied to a confined fluid at rest is transmitted with equal intensity throughout the fluid.

Pascal’s Principle Force All have equal pressure

By understanding Boyle’s Law and Pascal’s Principle, we can now understand how fluid power systems are used to create a mechanical advantage.

Mechanical Advantage n The increase in force gained by using a machine.

Mechanical Advantage using Fluid Power 10 : 1 advantage

Hydraulics and Pneumatics Part I As you watch the video, write down your definition of hydraulic systems, and make a list of as many of the different uses of hydraulics as you can as described in the video. Click here to watch video: http: //www. youtube. com/watch? v=Ylm. Ra 9 z. DF 8

Hydraulics and Pneumatics Part I Review n What is a hydraulic systems?

Hydraulic Systems n Fluid power systems that use oil or another liquid.

Hydraulics and Pneumatics Part I Review n What are some of the uses of hydraulics as described in the video?

Hydraulic System Components (actuator) (storage tank) Source: Dept of Navy-Fluid Power Training Manual

Hydraulics and Pneumatics Part II As you watch the video, write down your definition of pneumatic systems, and make a list of as many of the different uses of pneumatics as you can as described in the video. Click here to watch video: http: //www. youtube. com/watch? v=Uu. K 3 ESG gbqk

Hydraulics and Pneumatics Part II Review n What is a pneumatic systems?

Pneumatic Systems n Fluid power systems based on the use of air or another gas.

Hydraulics and Pneumatics Part I Review n What are some of the uses of pneumatics as described in the video?

Pneumatic System Components (actuator) (storage tank) (valve) (compressor/pump) 1. Air tool (actuator) 2. Air Hose 3/8” 3. Oiler 4. Pressure Regulator 5. Filter 6. Shut Off Valve 7. Lead Hose 8. Coupler body and connector 9. Drain daily 10. 1/2”or larger pipe and fitting 11. Air Dryer (storage tank/reservoir) 12. 1” or larger pipe and fitting 13. Air Compressor (pump) 14. Auto Drain 15. Drain daily Source: www. cartool. com. cn

Compressor n A device that converts mechanical force and motion into pneumatic fluid power.

Actuators n A device that converts fluid power into mechanical force and motion.

Source: Dept of Navy-Fluid Power Training Manual

Essential Question What are hydraulic and pneumatic systems?

Fluid Power (conclusion) ENGR 8 -4, Lesson 2 Hydraulic and Pneumatic Systems