|
 |
Rotor and
Bearing Modelling and Simulation |
 |
Rotating
machinery often experiences high vibration,
bearing and seal failures, etc., that are caused
by rotor dynamic problems. These problems may
include simple unbalance or more difficult
problems such as rotor-bearing critical speeds or
lack of proper machining clearances. Finite
element based rotor-bearing analysis software can
be used to perform the calculations necessary to
assess rotor-bearing critical speeds, shaft
deflection due to unbalance, and bearing
performance. These models provide a means of
evaluating a design and when verified by field
data are very useful as a trouble-shooting tool.
Rolling element bearing type machines may also
experience shaft resonance (critical speeds) or
bearing support resonance, which can also be
addressed thru modeling of the rotor and
bearings. Modal analysis is often used to
correlate the rotor-bearing model. A model
provides the ability to calculate affects of
modifyng the bearings and rotor design. The
response to forcing functions such as unbalance
can be calculated to look at bearing dynamic
loading, and seal clearance as well as rotor
static deflection or sag
If you have machinery that has historically
experienced high vibration and reliability
problems performing a rotor-bearing dynamic
analysis may identify the source of the problem
and a solution can be developed. We can discuss
these problems and give a brief overview at no
charge
Our special rotordynamics and bearings software
contains modules that are used daily by rotating
machinery manufacturers and end users around the
world for design, performance prediction, failure
analysis and troubleshooting. Applications
include rotating machinery such as a miniature
air turbine for a dental drill, a large turbine
generator set for a power plant, a small
compressor for an air conditioner, a pump for an
artificial heart, a fuel pump for a jet engine,
an electric motor and spindle for a miniature
computer hard disk, a canned pump for
petrochemical processing plant, synchronous motor
driven drive-trains, and a gear box for an
Uranium enrichment plant
|
|
|
|
© VSSS Copyright
home
| products
| services
| industry
| contact
|
|
 |
| Advanced
Rotor Dynamic Analysis: |
STABILITY ANALYSIS
© Natural frequencies & mode
shapes
© Growth factors/damping ratios
© Rotor orbit directions
© Bearing reaction forces
© Shaft weight, deflection,
& centerline slope
© Stability & critical speed
maps  TIME-TRANSIENT
RESPONSE(Non-synchronous
response)
© Gravitational & External
force: sinusoidal, step,ramp,
& pulse.
© Lateral amplitudes
© Rotor orbits
© Dynamic forces & moments
© Dynamic stresses |
|
|
| Bearing
Evaluation |
 Results include:
© Load capacity/journal position
© Attitude angle
© Viscous power loss
© Righting moments
© Flow requirements
© Stability (bearing whirl)
© Spring and damping
coefficients
© Clearance and pressure
distribution
© Recess pressures and flows
© Heat balance and temperature
rises |
|
|
|
