Fluid Power

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Fluid Power

• ENGR 8-4, Lesson 2
• Hydraulic and Pneumatic Systems

Written by Roland Williams
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Big Idea

• ENGR-TS-3 The students will develop an
  understanding of how humans interact with
  systems.

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Critical Knowledge/Elements

1. Operate technological systems
2. Maintain technological systems
3. Constructing technological systems
4. Design technological systems

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Essential Question
What are hydraulic and pneumatic systems?
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Word Wall

• Fluid
• Fluid Power
• Hydraulic Systems
• Pneumatic Systems
• Boyles Law

• Pascals Principle
• Pressure
• Actuators
• Compressor
• Mechanical Advantage

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Fluid Power Review

• What is a fluid power system?
• What is the definition of a fluid?

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How does a fluid power system work?
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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.
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Pressure

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

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Boyles Law

• The volume of gas varies as the pressure
  increases, whereas a liquids volume remains the
  same under pressure, provided the temperature
  remains constant.

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Boyles Law
2F
Liquid
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Pascals Principle

• A pressure applied to a confined fluid at rest is
  transmitted with equal intensity throughout the
  fluid.

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Pascals Principle
Force
All have equal pressure
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By understanding Boyles Law and Pascals
Principle, we can now understand how fluid power
systems are used to create a mechanical advantage.
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Mechanical Advantage

• The increase in force gained by using a machine.

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Mechanical Advantage using Fluid Power
10 1 advantage
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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?vYlmRa-9zDF8

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Hydraulics and Pneumatics Part I Review

• What is a hydraulic systems?

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Hydraulic Systems

• Fluid power systems that use oil or another
  liquid.

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Hydraulics and Pneumatics Part I Review

• What are some of the uses of hydraulics as
  described in the video?

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Hydraulic System Components
(actuator)
(storage tank)
Source Dept of Navy-Fluid Power Training Manual
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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?vUuK3ESGgbqk

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Hydraulics and Pneumatics Part II Review

• What is a pneumatic systems?

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Pneumatic Systems

• Fluid power systems based on the use of air or
  another gas.

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Hydraulics and Pneumatics Part I Review

• What are some of the uses of pneumatics as
  described in the video?

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Pneumatic System Components
(actuator)
(valve)

• 1. Air tool (actuator)2. Air Hose 3/83.
  Oiler4. Pressure Regulator5. Filter6. Shut Off
  Valve7. Lead Hose8. Coupler body and
  connector9. Drain daily10. 1/2or larger pipe
  and fitting11. Air Dryer (storage
  tank/reservoir)12. 1 or larger pipe and
  fitting13. Air Compressor (pump)14. Auto
  Drain15. Drain daily 

(storage tank)
(compressor/pump)
Source www.cartool.com.cn
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Compressor

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

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Actuators

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

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Source Dept of Navy-Fluid Power Training Manual
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Essential Question
What are hydraulic and pneumatic systems?
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Fluid Power (conclusion)

• ENGR 8-4, Lesson 2
• Hydraulic and Pneumatic Systems