Power Point Presentation Chapter 2 Fluid Power System
- Slides: 22
Power. Point® Presentation Chapter 2 Fluid Power System Principles Energy • Fluid Power Energy Transmission • Fluid Power System Variables
Chapter 2 — Fluid Power System Principles In fluid power systems, total energy is the sum of static energy, kinetic energy, and thermal energy.
Chapter 2 — Fluid Power System Principles Rotating mechanical energy is transferred to a hydraulic pump, which supplies hydraulic energy to the system in the form of kinetic energy (fluid flow).
Chapter 2 — Fluid Power System Principles Electric energy is changed into rotating mechanical energy by the electric motor and is transmitted to the conveyor belt by a belt drive system.
Chapter 2 — Fluid Power System Principles When making comparisons between hydraulics and pneumatics, there are differences in system variables that must be taken into consideration.
Chapter 2 — Fluid Power System Principles Heat from friction is generated through different actions in a fluid power system, such as fluid flowing through a hose, or a piston moving against a cylinder body.
Chapter 2 — Fluid Power System Principles Fluid power systems complete work using actuators such as cylinders, motors, and oscillators.
Chapter 2 — Fluid Power System Principles The amount of work produced is calculated by multiplying the force that must be overcome by the distance over which it acts.
Chapter 2 — Fluid Power System Principles Power indicates the rate that work is done.
Chapter 2 — Fluid Power System Principles Horsepower is a mechanical unit of measure equal to the force required to lift 550 lb, 1 ft in 1 sec.
Chapter 2 — Fluid Power System Principles Pascal’s law states that an applied force placed on a fluid will transmit undiminished in all directions.
Chapter 2 — Fluid Power System Principles In hydraulic systems, area typically refers to diameter of the piston face.
Chapter 2 — Fluid Power System Principles Pressure is determined by the area and force present.
Chapter 2 — Fluid Power System Principles The fluid power (Pascal’s law) circle is a visual representation of how the formulas for pressure, force, and area are interrelated in a fluid power system.
Chapter 2 — Fluid Power System Principles Less pressure is required to extend a rod than to retract one due to more surface area.
Chapter 2 — Fluid Power System Principles Atmospheric pressure is the pressure created by the weight of the atmosphere at sea level under standard conditions.
Chapter 2 — Fluid Power System Principles The difference between gauge pressure and absolute pressure is 14. 7 psi, or atmospheric pressure.
Chapter 2 — Fluid Power System Principles A mercury barometer indicates atmospheric pressure with a column of mercury.
Chapter 2 — Fluid Power System Principles A Bourdon tube pressure gauge indicates pressure using the movement of a Bourdon tube.
Chapter 2 — Fluid Power System Principles A spring-loaded piston gauge uses fluid pressure to push a piston against a compression spring that is attached to a pointer.
Chapter 2 — Fluid Power System Principles A digital pressure gauge converts fluid pressure into an electrical signal and has an easy-to-read digital display.
Chapter 2 — Fluid Power System Principles Common vacuum gauge readings range from – 1. 47 in. Hg to – 14. 7 in. Hg, and – 0. 10 bar to – 1. 01 bar.
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