Abstract: A detailed look at theory and applications necessary for fluid power hydraulic and pneumatic power types of equipment Fluid Power Engineering.
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ISA was and is forged and founded from true honesty and integrity that you will not find in to many other professions. Design, operate, and maintain fluid and pneumatic power equipment using the expert information contained in this authoritative volume. Fluid Power Engineering presents a comprehensive approach to hydraulic systems engineering with a solid grounding in hydrodynamic theory.
The book explains how to create accurate mathematical models, select and assemble components, and integrate powerful servo valves and actuators. You will also learn how to build low-loss transmission lines, analyze system performance, and optimize efficiency. InTech Magazine Web Exclusive: Choose from one category below to get involved now!
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Select One Alexandria Egypt Nigeria. Get Involved in ISA. Interested in attending an ISA Conference? Browse the products and services designed to meet the needs of these common industry roles: Training Classes See All. Within a fluid power system, cylinders and motors also called actuators do the desired work. Control components such as valves regulate the system. A fluid power system has a pump driven by a prime mover such as an electric motor or internal combustion engine that converts mechanical energy into fluid energy, Pressurized fluid is controlled and directed by valves into an actuator device such as a hydraulic cylinder or pneumatic cylinder , to provide linear motion, or a hydraulic motor or pneumatic motor , to provide rotary motion or torque.
Rotary motion may be continuous or confined to less than one revolution. This type is generally used for low-pressure, high volume flow applications. Since they are not capable of withstanding high pressures, there is little use in the fluid power field.
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Their maximum pressure is limited to psi. This type of pump is primarily used for transporting fluids from one location to another. Centrifugal and axial flow propeller pumps are the two most common types of dynamic pumps. Positive Displacement Pumps This type is universally used for fluid power systems. With this pump, a fixed amount of fluid is ejected into the hydraulic system per revolution of pump shaft rotation.
These pumps are capable of overcoming the pressure resulting from the mechanical loads on the system as well as the resistance to flow due to friction. These two features are highly desirable in fluid power pumps. These pumps also have the following advantages over non positive displacement pumps:.
Fluid power systems can produce high power and high forces in small volumes, compared with electrically-driven systems. The forces that are exerted can be easily monitored within a system by gauges and meters. In comparison to systems that provide force through electricity or fuel, fluid power systems are known to have long service lives if maintained properly. The working fluid passing through a fluid motor inherently provides cooling of the motor, which must be separately arranged for an electric motor.
Fluid motors normally produce no sparks, which are a source of ignition or explosions in hazardous areas containing flammable gases or vapors. Fluid power systems are susceptible to pressure and flow losses within pipes and control devices. Fluid power systems are equipped with filters and other measures to preserve the cleanliness of the working fluid.
Any dirt in the system can cause wear of seals and leakage, or can obstruct control valves and cause erratic operation. The hydraulic fluid itself is sensitive to temperature and pressure along with being somewhat compressible.
Fluid power - Wikipedia
These can cause systems to not run properly. If not run properly, cavitation and aeration can occur. Mobile applications of fluid power are widespread. Nearly every self-propelled wheeled vehicle has either hydraulically-operated or pneumatically-operated brakes. Earthmoving equipment such as bulldozers , backhoes and others use powerful hydraulic systems for digging and also for propulsion.
A very compact fluid power system is the automatic transmission found in many vehicles, which includes a hydraulic torque converter. Fluid power is also used in automated systems, where tools or work pieces are moved or held using fluid power.
Variable-flow control valves and position sensors may be included in a servomechanism system for precision machine tools. Below is a more detailed list of applications and categories that fluid power is used for:. This circuit works off of synchronization.