Power Point Presentation Chapter 3 Hydraulic System Fundamentals
- Slides: 37
Power. Point® Presentation Chapter 3 Hydraulic System Fundamentals Hydraulic Principles • Hydraulic System Pressure Supplements • Hydraulic Means of Transmission • Fluid Power System Diagrams
Chapter 3 — Hydraulic System Fundamentals Liquid takes the shape of any container it is in, but only as much volume as it can fill.
Chapter 3 — Hydraulic System Fundamentals In a hydraulic system, liquid can transmit energy because it is almost completely incompressible.
Chapter 3 — Hydraulic System Fundamentals Pascal’s law can be applied during the transmission of energy in a hydraulic system.
Chapter 3 — Hydraulic System Fundamentals Laminar flow is preferred in fluid power systems over turbulent flow because it is more efficient and loses less energy.
Chapter 3 — Hydraulic System Fundamentals Volume is the three-dimensional space of an object measured in cubic units.
Chapter 3 — Hydraulic System Fundamentals Fluids that are thick and flow with difficulty have high viscosity, while liquids that are thin and flow easily have low viscosity.
Chapter 3 — Hydraulic System Fundamentals A Saybolt viscometer is a test instrument used to measure fluid viscosity.
Chapter 3 — Hydraulic System Fundamentals A flow meter is a meter that is used to measure the flow of fluid (in gpm) within a system.
Chapter 3 — Hydraulic System Fundamentals Resistance to fluid flow generates friction and the resulting energy is converted into heat.
Chapter 3 — Hydraulic System Fundamentals Fluids follow the path of least resistance, thus the cylinder with the least amount of load on it extends first.
Chapter 3 — Hydraulic System Fundamentals Velocity is the speed of fluid flow through a hydraulic line in feet per second.
Chapter 3 — Hydraulic System Fundamentals The velocity of a fluid increases at any restriction in the piping or component if the flow rate remains the same in the system.
Chapter 3 — Hydraulic System Fundamentals A relief valve sets the maximum operating pressure in a hydraulic system.
Chapter 3 — Hydraulic System Fundamentals When there is too much resistance, pressure increases until the weakest point in the system fails and bursts.
Chapter 3 — Hydraulic System Fundamentals Accumulators are categorized as mechanical or gas charged.
Chapter 3 — Hydraulic System Fundamentals A force multiplication system allows the force applied on one cylinder to be increased on another cylinder.
Chapter 3 — Hydraulic System Fundamentals An intensifier converts low-pressure, high-flow hydraulic fluid to highpressure, low-flow hydraulic fluid.
Chapter 3 — Hydraulic System Fundamentals A hydraulic power unit is a self-contained unit that contains all the equipment required to create fluid flow.
Chapter 3 — Hydraulic System Fundamentals A custom-designed power unit is often housed in a separate facility known as a pump-room or pumphouse.
Chapter 3 — Hydraulic System Fundamentals The two types of pipes that are used in hydraulic system applications are black and stainless steel.
Chapter 3 — Hydraulic System Fundamentals The three common pipe schedules that are used in fluid power applications are schedule 40, schedule 80, and schedule 160.
Chapter 3 — Hydraulic System Fundamentals Piping is typically welded to flanges, with the flanges bolted together.
Chapter 3 — Hydraulic System Fundamentals The two types of pipe threaders are handheld pipe threaders and pipethreading machines.
Chapter 3 — Hydraulic System Fundamentals Male pipe threads are cut at the ends of a pipe to ensure a proper connection with the pipe fitting.
Chapter 3 — Hydraulic System Fundamentals Leave a couple of the end pipe threads free from pipe thread sealant to ensure that it does not contaminate the system.
Chapter 3 — Hydraulic System Fundamentals A flared fitting is connected to tubing in which the end is spread outward.
Chapter 3 — Hydraulic System Fundamentals A flared fitting is tightened by using a torque wrench or by turning the fitting nut while observing witness marks.
Chapter 3 — Hydraulic System Fundamentals Flareless tube compression fittings create a seal with a ferrule.
Chapter 3 — Hydraulic System Fundamentals Tubing is typically bent to reduce strain from vibration and to compensate for thermal expansion that is caused by heated liquid.
Chapter 3 — Hydraulic System Fundamentals Hoses are fabricated in layers for use in high-pressure hydraulic systems.
Chapter 3 — Hydraulic System Fundamentals Two types of connection fittings for hoses are threaded fittings and quick-disconnect fittings.
Chapter 3 — Hydraulic System Fundamentals Hoses are installed to avoid excessively short lengths, sharp bends, and twists.
Chapter 3 — Hydraulic System Fundamentals A pictorial diagram is a graphic representation that shows how devices interconnect in a fluid power system.
Chapter 3 — Hydraulic System Fundamentals A cutaway diagram shows the internal details of components and the path of fluid flow.
Chapter 3 — Hydraulic System Fundamentals A schematic diagram uses standardized lines and shapes with interconnecting lines to represent the function of each component in a system.
Chapter 3 — Hydraulic System Fundamentals The different lines used in schematic diagrams are standardized to represent various types of working pipes.