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WOLFRAM SYSTEM MODELER

Gearbox

Realistic model of a gearbox (based on LossyGear)

Diagram

Wolfram Language

In[1]:=

SystemModel["Modelica.Mechanics.Rotational.Components.Gearbox"]

Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

This component models the essential effects of a gearbox, in particular

in component lossyGear
- gear efficiency due to friction between the teeth
- bearing friction
in component elastoBacklash
- gear elasticity
- damping
- backlash

The inertia of the gear wheels is not modeled. If necessary, inertia has to be taken into account by connecting components of model Inertia to the left and/or the right flange of component Gearbox.

Parameters (9)

useSupport	Value: false Type: Boolean Description: = true, if support flange enabled, otherwise implicitly grounded
useHeatPort	Value: false Type: Boolean Description: = true, if HeatPort is enabled
T	Value: 293.15 Type: Temperature (K) Description: Fixed device temperature if useHeatPort = false
ratio	Value: Type: Real Description: Transmission ratio (flange_a.phi/flange_b.phi)
lossTable	Value: [0, 1, 1, 0, 0] Type: Real[:,5] Description: Array for mesh efficiencies and bearing friction depending on speed (see docu of LossyGear)
c	Value: Type: RotationalSpringConstant (N⋅m/rad) Description: Gear elasticity (spring constant)
d	Value: Type: RotationalDampingConstant (N⋅m⋅s/rad) Description: Gear damping (relative damping)
b	Value: 0 Type: Angle (rad) Description: Total backlash
stateSelect	Value: StateSelect.prefer Type: StateSelect Description: Priority to use phi_rel and w_rel as states

Connectors (6)

	flange_a	Type: Flange_a Description: Flange of left shaft
	flange_b	Type: Flange_b Description: Flange of right shaft
	support	Type: Support Description: Support/housing of component
	internalSupport	Type: Support Description: Internal support/housing of component (either connected to support, if useSupport=true, or connected to fixed, if useSupport=false)
	heatPort	Type: HeatPort_a Description: Optional port to which dissipated losses are transported in form of heat
	internalHeatPort	Type: HeatPort_a Description: Thermal port for 1-dim. heat transfer (filled rectangular icon)

Components (4)

	fixed	Type: Fixed Description: Fixed support/housing, if not useSupport
	fixedTemperature	Type: FixedTemperature Description: Fixed temperature boundary condition in Kelvin
	lossyGear	Type: LossyGear Description: Gear with mesh efficiency and bearing friction (stuck/rolling possible)
	elastoBacklash	Type: ElastoBacklash Description: Backlash connected in series to linear spring and damper (backlash is modeled with elasticity)