FLUID POWER WITH APPLICATIONS ANTHONY ESPOSITO PDF

It answers the question What is fluid power? Advantages and applications of fluid power systems are discussed in detail. Emphasis is placed on the fact that fluid power systems are designed to perform useful work. A complete hydraulic system and a complete pneumatic system are individually presented with identifications of the necessary components and their functions.

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A hydraulic rescue tool is used to extract injured people from wrecked cars Pneumatic and hydraulic systems compared[ edit ] Cost: Pneumatics are less expensive to build and operate. Air is used as the compressed medium, so there is no requirement to drain or recover fluid.

Hydraulic systems use larger working pressures, and require larger parts than pneumatics. Precision: Unlike liquids, gases change volume significantly when pressurized making it difficult to achieve precision. Common hydraulic circuit application[ edit ] Synchronizing[ edit ] This circuit works off of synchronization.

As a cylinder reaches a certain point another will be activated, either by a hydraulic limit switch valve or by the build-up of pressure in the cylinder. These circuits are used in manufacturing. An example of this would be on an assembly line. As a hydraulic arm is activated to grab an object. It then will reach a point of extension or retraction, where the other cylinder is activated to screw a cap or top onto the object.

Hence the term Synchronizing. Regenerative[ edit ] In a regenerative circuit, a double acting cylinder is used. This cylinder has a pump that has a fixed output. The use of a regenerative circuit permits use of a smaller size pump for any given application. This works by re-routing the fluid to the cap instead of back to the tank [3] [ citation needed ]. For example, in a drilling process a regenerative circuit will allow drilling at a consistent speed, and retraction at a much faster speed.

This gives the operator a faster and more precise production. A wide variety of measuring, sensing, or control elements are available in electrical form. These can be used to operate solenoid valves or servo valves that control the fluid power element. Electrical control may be used to allow, for example, remote control of a fluid power system without running long control lines to a remotely located manual control valve.

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