This hydraulic library contains components for modeling hydraulic systems. Some of the components could be connected to other components in other Modelica libraries. The pumps and motors
can be connected to rotational mechanical
components from the Modelica Standard Library. The cylinders
can be connected to translational mechanical
components from the Modelica Standard Library. Many other models, for example the proportional valves
, can be connected to blocks
from the Modelica Standard Library. The component icons are painted according to the DIN ISO 1219 standard.
For a quick overview of the different packages in this library, go to the top
Most of the components in this library have lumped volumes to make it possible to connect them arbitrarily. They are referred to as dynamic components
. A dynamic component is normally built up using static components
and volumes. The static components are normally modeled inside the dynamic components since they should not be used outside the component. The added advantage is that a dynamic component can be connected almost arbitrarily. Note however that some combinations and circuits are not physically relevant and should therefore be avoided.
All the static models have a dotted frame to make it easy to identify them. The figures below show the icons for the dynamic and static version of a valve. The dotted frame is used for the static models
The connectors in this library are defined in the Interfaces
package. The ports have a pressure variable p
in [Pa] and a flow variable mdot
in [kg/s], defined positive into the component. There are two types of ports in this library, Port_a and Port_b. The only difference between them is the icons. The connectors
No cavitation and temperature effects have been modeled. Bulk modulus is assumed to be constant when fluid compressibility is modeled.
In the Examples
package, there are examples of how to use the components in the library to build hydraulic systems.
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