HydraulicSystem

HydraulicSystem - ME375 Handouts Hydraulic (Fluid) Systems...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
ME375 Handouts 1 School of Mechanical Engineering Purdue University ME375 Hydraulic - 1 Hydraulic (Fluid) Systems Fundamental Principles – Pascal’s Law: Pressure applied to the fluid is transmitted equally in all directions – Transmit forces (incompressible) Applications – High force – Heavy loads – Precise motion
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ME375 Handouts 2 School of Mechanical Engineering Purdue University ME375 Hydraulic - 2 Hydraulic System Modeling Basic Modeling Elements – Resistance – Capacitance – Inertance – Pressure and Flow Sources Interconnection Relationships – Compatibility Law – Continuity Law Derive Input/Output Models
Background image of page 2
ME375 Handouts 3 School of Mechanical Engineering Purdue University ME375 Hydraulic - 3 The analogy between a hydraulic system and an electrical system will be used often. Just as in electrical systems, the flow rate (current) is defined to be the time rate of change (derivative) of volume (charge): The pressure, p , used in this chapter is the absolute pressure . You need to be careful in determining whether the pressure is the absolute pressure or gage pressure , p * . Gage pressure is the difference between the absolute pressure and the atmospheric pressure, i.e. Key Concepts q : volumetric flow rate [m 3 /sec] ( ) p : pressure [N/m 2 ] ( ) v : volume [m 3 ] ( ) p p p atmospheric * q d dt v v  
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
ME375 Handouts 4 School of Mechanical Engineering Purdue University ME375 Hydraulic - 4 Fluid Resistance Describes any physical element with the characteristic that the pressure drop, D p, across the element is proportional to the flow rate q . – Orifices, valves, nozzles and friction in pipes can be modeled as fluid resistors. Basic Modeling Elements D D p p p p R q q R p R p 1 2 12 12 1 1 q R + D p p 1 p 2 + D p R p 1 p 2 q Fluid Capacitance Describes any physical element with the
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 15

HydraulicSystem - ME375 Handouts Hydraulic (Fluid) Systems...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online