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

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

3. Critical Knowledge/Elements
Operate technological systems
Maintain technological systems
Constructing technological systems
Design technological systems

4. Essential Question
What are hydraulic and pneumatic systems?

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

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

7. How does a fluid power system work?

8. 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.

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

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

11. Boyle’s Law 2F
Liquid

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

13. All have equal pressure
Pascal’s Principle
Force
All have equal pressure

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

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

16. Mechanical Advantage using Fluid Power

17. 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:

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

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

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

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

22. 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:

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

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

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

26. Pneumatic System Components
(actuator)
(valve)
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  
(storage tank)
(compressor/pump)
Source:

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

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

29. Source: Dept of Navy-Fluid Power Training Manual

30. Essential Question
What are hydraulic and pneumatic systems?

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