Fluid Power Circuits and Controls: Fundamentals and Applications

Engineers not only need to understand the basics of how fluid power components work, but they must also be able to design these components into systems and analyze or model fluid power systems and circuits. There has long been a need for a comprehensive text on fluid power systems, written from an engineering perspective, which is suitable for an undergraduate-level course in fluid power. Fluid Power Circuits and Controls: Fundamentals and Applications encourages students to think of the collection of components as a system. The author illustrates each concept with a circuit diagram, and as each component is discussed, immediately places it in a circuit and analyzes its performance. This approach allows students to immediately apply what they have learned and encourages them to think about how the component operating characteristics interact with the rest of the circuit. Covering all aspects of the industry, this book: Develops the basic concept for power delivery with fluids Reviews basic concepts of fluid mechanics and discusses the key properties of the fluids Discusses the creation and control of flow and the various methods used to control pressure in a circuit Provides a detailed example of the classic problem of hydrostatic transmission design Presents characteristics of auxiliary components and applicable SAE standards Addresses pneumatics, focusing on the difference in power transmission for liquid and gas Discusses servo valves and proportional valves without requiring a background in automatic controls The text is richly illustrated, filled with fully worked example problems, and reinforced with exercises in each chapter. Fluid Power Circuits and Controls offers valuable design experience and the background its readers need to approach real-world fluid power problems with confidence.

Table of Contents:
Preface BRIEF OVERVIEW OF FLUID POWER Introduction Concept of Fluid Power Summary FLUID POWER BASICS Introduction Fluid Statics Functions of a Working Fluid Fluid Properties Flow in Lines Leakage Flow Orifice Equation Summary Data Selected for Hydraulic Fluids PRESSURE CONTROL Introduction Review of Needed Symbols Relief Valve Unloading Valve Sequence Valve and Pressure-Reducing Valve Counterbalance Valve and Brake Valve Summary CREATION AND CONTROL OF FLUID FLOW Introduction Fixed Displacement Pumps Fixed Displacement Pump Circuits Variable Displacement Pump Circuits Comparison of Pump Performance Characteristics for Three Main Designs Multiple Pump Circuits Pump Mounts Flow Control Valves Circuits Using Flow Control Valves Summary ROTARY ACTUATORS Introduction Stall Torque Efficiency Typical Performance Data for a Gear motor Comparison of Motor Performance Characteristics for Three Main Designs Performance Characteristics of Low-Speed, High-Torque Motors Design Example for Gear Motor Application Interaction of Pump and Motor Characteristics Bent Axis motors Radial Piston motors Motor-Gearbox Combinations Oscillating Actuator Summary Curve Fitting Technique HYDROSTATIC TRANSMISSIONS Introduction Mechanical Transmissions Introduction to Hydrostatic Transmissions Hydrostatic Transmissions for Vehicle Propulsion Different Configurations of Hydrostatic Transmissions to Propel Vehicles Classification of Hydrostatic Transmissions Closed-Circuit Hydrostatic Transmissions Closed-Circuit, Closed-Loop Hydrostatic Transmissions Hydrostatic Transmission Design Summary Basic Concepts in Traction Selected Catalog Data for Hydrostatic Transmission Design Problems LINEAR ACTUATORS Introduction Analysis of Cylinders in Parallel and Series Synchronization of Cylinders Cushioning Rephasing of Cylinders Presses Load Analysis Types of Cylinders Cylinder Construction Summary TEMPERATURE AND CONTAMINATION CONTROL Introduction Temperature Control Contamination Control Summary AUXILIARY COMPONENTS Introduction Reservoir Hydraulic Lines Fluid Velocity in Conductors Options for Connecting Components Installation of Lines Design Life of Components System Integration Summary Selected Design Data for Fluid Conductors PNEUMATICS Introduction Orifice Equation Compressors Receiver Pipelines Preparation of Compressed Air Cylinders Motors Additional Actuator Units Valves Summary Standard Conditions SERVO VALVES Introduction Concept Servo Valve Construction Valve Performance Types of Servo Systems Servo Amplifiers Servo Analysis Summary PROPORTIONAL VALVES Introduction Types of Proportional Valves Analysis of Proportional Directional Control Valve Comparison of Servo and Proportional Valves Summary Summary of Equations Index