What is the definition of "hydraulic system"?
A power transmission system that uses the force of flowing liquids to transmit power.

Learn more about hydraulic system in the class Intro to Fluid Systems 100 below.


Hydraulics and Pneumatics Training


Class Information
Hydraulics and Pneumatics Training Tooling U-SME classes are offered at the beginner, intermediate, and advanced levels. The typical class consists of 12 to 25 lessons and will take approximately one hour to complete.
Class Name:Intro to Fluid Systems 100
Description:This class provides an introduction to fluid power systems, including hydraulic and pneumatic components.
Prerequisites: none
Difficulty:Beginner
Number of Lessons:14
Language:English, Spanish
 
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Class Outline
  • Objectives
  • Introduction to Power Transmission
  • What Is A Fluid?
  • What Is Fluid Power Transmission?
  • Hydraulic Fluids
  • Pneumatic Fluid
  • Fluid Power System Components
  • Hydraulic Pumps
  • Air Compressors
  • Fluid Control Components
  • Actuators
  • Fluid Conductors
  • Advantages of Fluid Power
  • Summary
  
Class Objectives
  • Describe power transmission systems.
  • Describe fluids.
  • Describe fluid power.
  • Describe the properties of hydraulic fluid.
  • Describe pneumatic fluid.
  • Describe fluid power system components.
  • Describe a hydraulic pump.
  • Describe an air compressor.
  • Describe a control valve.
  • Describe an actuator.
  • Describe a fluid conductor.
  • Describe the advantages of fluid power.

Class Vocabulary

Vocabulary TermDefinition
actuator Components that directly help convert hydraulic or pneumatic energy into mechanical energy. Actuators are also known as effectors.
aftercooler A heat exchanger that reduces the temperature of the air discharged from an air compressor.
air compressor A mechanical device that pressurizes gas in order to create power.
air receiver An air storage tank used with pneumatic systems that balances the air compressor capacity and airflow demand.
ambient atmosphere The environment surrounding the air receiver.
American National Standards Institute A private, non-profit organization that administers and coordinates voluntary standards and systems.
atmospheric pressure The weight of the atmosphere. Atmospheric pressure refers to the amount of pressure exerted by the air.
compressibility The ability of fluids to decrease in volume as a result of applied pressure.
conductor The components such as pipes, tubes, and hoses that convey fluids throughout a hydraulic or pneumatic system.
control valve Mechanisms that control fluids in a pneumatic or hydraulic system. Control valves direct fluid movement and regulate the amount of pressure exerted in the fluid system.
cylinder A type of linear actuator that uses a piston to produce motion in a straight line. A cylinder is also known as a piston actuator.
demulsibility The resistance of a hydraulic fluid to emulsification, or how well a hydraulic fluid resists mixing with water.
diaphragm actuator A type of linear actuator that has a chamber divided in half by a diaphragm that separates areas with different pressure levels.
effector Components that directly help convert hydraulic or pneumatic energy into mechanical energy. Effectors are also known as actuators.
electrical system A power transmission system that uses the force of flowing electrons to transmit power.
energy The measure of being able to produce work.
flanging An operation that bends the edge of a part to add stiffness. Flanging most often creates a 90° bend in the metal.
FLR-unit A device that conditions air for use in pneumatic systems. A filter-lubricator-pressure-regulator is commonly called an FLR-unit.
fluid A state of matter that has the ability to flow. Fluids can be liquids or gases.
fluid motor A device that converts the energy from fluid flow into mechanical motion. Hydraulic and pneumatic motors are fluid motors.
fluid power Power derived from the motion and pressure of a fluid, such as water or air. Hydraulics and pneumatics are sources of fluid power.
Fluid system A power transmission system that uses the force of flowing liquids and gases to transmit power. Fluid systems include hydraulic systems and pneumatic systems.
force The push or pull that changes an object's state of motion.
gas A fluid without a fixed volume that has the ability to flow and fill the space it occupies.
gear pump A hydraulic pump that uses meshed gears that rotate and move liquid through a hydraulic system.
gear screw compressor An air compressor that uses meshed gears that rotate and move air or gas through a pneumatic system.
heat exchanger Hydraulic components that help relieve the excessive heat that builds up in a hydraulic system.
hydraulic motor A device that converts the energy from liquid flow into mechanical motion. A hydraulic motor is a type of fluid motor.
hydraulic pump A mechanical device used to move liquids in a hydraulic system.
hydraulic system A power transmission system that uses the force of flowing liquids to transmit power.
International Organization for Standardization The International Organization for Standardization. ISO establishes documented standards, rules, and guidelines to ensure that products, processes, and services are fit for their purpose.
kinetic energy Energy existing due to an object's motion.
linear actuator A valve actuator that produces motion in a straight line.
linear-to-rotary actuator A valve actuator that converts linear motion to rotary motion.
liquid A fluid with a fixed volume that has the ability to flow and take the shape of its container.
lubricity The property that diminishes friction and increases smoothness and slipperiness.
manifold A standard block component used in fluid power systems that enables the use of multiple control valves.
matter A substance that has mass and exists as a solid, liquid, or a gas.
mechanical system A power transmission system that uses forces created by the physical interaction of instruments or tools to transmit power.
molecule The smallest unit into which a material can be divided without changing its properties. A molecule consists of a group of atoms held together by strong primary bonds.
National Fluid Power Association A national organization consisting of manufacturers, distributors, customers, vendors, and educators who work together for the advancement of fluid power technology and development of the industry.
newtons per square meter A unit of pressure. A newton per square meter is also known as a Pascal, which is derived from the International System of Units (SI).
non-petroleum-based oil A hydraulic fluid that contains no petroleum. Non-petroleum based oils are ideal for hydraulic systems that are used near a fire hazard.
Pascal's Law A hydrostatic principle that states when pressure is applied to a contained fluid, the force is transmitted equally in all directions.
petroleum-based oil A hydraulic fluid developed from petroleum. Petroleum-based oils are the most common hydraulic fluids.
piston actuator A type of linear actuator that uses a piston and rod to produce motion in a straight line. A piston actuator is also known as a cylinder.
piston compressor An air compressor that uses a piston and inlet and outlet check valves to allow fluid through a pneumatic system.
piston pump A hydraulic pump that uses pistons to move fluid through a hydraulic system. The pistons are driven by the rotation of a cam or by rotating against an angled swash plate.
pneumatic system A power transmission system that uses the force of flowing gases to transmit power.
positive-displacement pump A hydraulic pump that continues to discharge fluid as long as it is powered.
potential energy Energy that is stored in an object.
pounds per square inch A unit of pressure. Pounds per square inch is derived from the English system of measurement and is abbreviated psi.
power transmission The movement of energy from a source to a location.
pressure The amount of force applied upon an object. Pressure is a derived unit that combines time, area, and mass.
pressure-relief valve A control valve that opens when set fluid pressure is exceeded.
prime mover The main component of a pneumatic or hydraulic system that powers a pump or compressor.
rack-and-pinion actuator A linear-to-rotary actuator that uses a gear pinion and rack to convert linear motion to rotary motion.
rotary actuator A valve actuator that produces circular motion.
shaft The component on the control valve that operates the flow control element.
slide valve A type of control valve that uses a metal plate as a gate to control fluid flow.
slurries A liquid that contains suspended solids.
threading The process of cutting a long, spiraling groove into a workpiece with a single-point tool. Threading processes are essential for the creation of fasteners.
vacuum The state of negative pressure. A hydraulic pump works by creating a vacuum in the closed hydraulic system.
vane The component within a valve that traps or moves fluid through the valve.
vane compressor An air compressor that uses a flat protrusion to trap and move air or gas through a pneumatic system.
vane pump A hydraulic pump that uses a flat protrusion to trap and move liquid through a hydraulic system.
vapor lock Rapid formation of vapor in fluid conductors that can obstruct fluid flow.
viscosity A hydraulic fluid's resistance to flow. As temperature increases, viscosity decreases.
volume The amount of space that an object occupies. Solids and liquids have definite volume.
welding A joining process that uses heat, pressure, and/or chemicals to fuse two materials together permanently.
work The result of force applied to an object over a distance.