Content. Chapter 1 Hydraulic energy converters... 10
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1 Content Chapter 1 Hydraulic energy converters List of symbols Hydraulic pump types, constant output External gear pumps Internal gear pumps Vane pumps Radial piston pumps Hydraulic pump types, variable output Swash plate pumps Proportional flow control Pressure control Load sense control Summary of pump characteristics Formulas Volumetric efficiency / mechanical efficiency Actuators: cylinders Different types of cylinders Formulas for a double action cylinder Permissible speed Cylinder friction Application of the cylinder Buckle calculation for cylinders Rod layers Cylinder cushioning Cavitation Actuators: hydraulic motors Motor with fixed displacement or stroke volume Motor with variable stroke volume Formulas for a hydraulic motor VII Chapter 2 Hydraulic energy control, conductive part Pressure control valves Pressure reducing valve Pressure sequence valve Brake (counter balance) valve Directional valves Flow valves Non-return (check) valves Throttle valves Proportional and servo valves General Proportional controls Higher pressure drop across the valve ports Performance curve for the proportional valve The asymmetrical spool Slowing down of a load Way and 3-way pressure compensation, loadsensing... 68
2 Chapter 3 Conductive part, piping and fluids List of symbols Piping Fluid properties Chapter 4 Fluid conditioners and hydraulic accumulators List of symbols Reservoir Filtration Different filtration methods: Design considerations Accumulator Definition Applications Types Working conditions, Law of Boyle-Gay-Lussac Chapter 5 AC induction machines Construction and principle of operation Speed and torque control Details of the AC-DC-AC Chapter 6 Control technology VIII 6.1 List of symbols Block diagram and laplace transformation st order system, step response Elasticity of hydraulic fluids Stiffness of a cylinder Stiffness of a hydraulic motor Results of stiffness calculations Mass spring system Reduced mass and moment of inertia Dynamic behaviour Complex numbers, polar diagram Stability of 2nd and higher order systems Control errors The integrating controller (i-controller) The dynamics of the ac-induction motor Chapter 7 Linear drives, open-loop List of symbols Mass loaded cylinder with counterbalance valve Mass loaded cylinder with load control valve Mass loaded cylinder with flow control valve Pressure/force control Suspended force
3 Chapter 8 Linear drives, closed loop systems List of symbols Proportional control Static and dynamic parameters Detailed hydraulic schema Servo control, application Functional requirements Calculation of the drive system Details of the drive system Commissioning Servo control, application Functional requirements Calculation of the control system Back-up accumulator Design detail Chapter 9 Heave compensation List of symbols Passive heave compensation, quasi-static behaviour Passive heave compensation dynamics Offshore applications Type of gas Combustion of a fluid Static electricity Sparks caused by mechanical friction Using nitrogen Active heave compensation Method of construction Deployment/retrieval of the load Design of the gas system Pressure equaliser function Pressure drop in the pipe work IX Chapter 10 Rotating drives List of symbols Primary and secondary hydraulic drives Comparison of a hydraulic and an electrical drive Hydraulic drive Electrical drive Realisation of the drive The high torque motor solution The high speed motor solution The electric motor solution Design choice Hydraulic drive in open loop Dynamics of rotational drives Secondary drive for sawing mechanism
4 Chapter 11 Subsea drives List of symbols Subsea hydraulic drives Subsea hammering Salvage of the Kursk submarine A hydraulic drive for a subsea Grab Subsea clamp systems Subsea valve control Subsea electrical drives Chapter 12 Safety design rules X 12.1 Legal requirements Machinery Directive Pressure Equipment Directive Division into categories Requirements for the product Atmospheres explosive directive Division into groups and categories Division into zones and division into gas groups Methods of protection Classifications bureaus Risk analysis Hazard Identification Study Failure modes analysis Examples of real life failures Free fall of a winch motor (1) Free fall of a winch motor (2) Index
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