The vibrations generated by rotating machines correspond to the dynamic efforts generated by moving parts. Analysis of the vibration pattern makes it possible to assess the operating condition of the machine and detect defects at an early stage.
A misaligned or unbalanced drive shaft or propeller
The condition of bearings and gearings
Tightening defects, excessive clearances
The condition of ventilator or pump blades
Onsite balancing
Example showing damaged bearing detected before heavy breakdown
Acoustics
Levels of airborne noise in the cabins, lounges, meeting rooms, participate in passenger overall comfort and are subject to increasingly strong requirements. Their measurement and analysis (global level and detailled spectrums) allow not only to locate the performance levels achieved but also to understand the paths and defects in sound transmissions:
Engines noise,
Generators noise,
Air conditioning noise
Neighboring rooms soundproof
Modal Analysis
Experimental modal analysis shows structure deflection according to frequencies.
Analysis will define eigen frequencies (resonance) and simulate structure vibration behaviour.
Operating Deflection Shape
Impact hammer test
Operating Deflection Shape on air cooler duct
Torque and torsional vibrations measurements
Torsional vibration is an oscillatory angular motion causing twisting in the shaft of a system.
It is generated by pistons alternative forces on crankshaft Even though the vibration cannot be detected without special measuring equipment, its amplitude can be destructive.
Small variations of torque measurement is performed with special device fixed on shaft.
In situ torque measurement on rotating shaft by means of strain gauges.
Easy setting on shaft
Digital 2.4Ghz telemetry
Strain gauges Wheatstone bridge
Computer remote control
Laser alignment
Correct alignment is a key issue on a machinery or a shaft. Any wrong alignment will generate undesirable vibrations, excessive worn out of parts and destruction of bearings
Align horizontal and vertical rotating machinery
Align coupled and uncoupled shafts Align machine trains, up to six machines in series
Take thermal growth into account
Inside Bore alignment of Stern Tube, Diesel Engine, Compressor, Turbine, Pump and more
Geometrical and dimensionnal measurements
Flatness and topography measurements
Hull deformation measurement before and in drydock
Positioning of freeboard marks and draft
Engineering and calculations
CALCULATION
Shaft bending parameters
Bearing offsets & loads, Gag & Sag
Influence coefficients
PROPELLER SHAFT JACK UP TEST
Jack up test is an easy way to measure the bearing load A dial gauge and sufficient hydraulic jacks are sufficient