Features
The backbone of all pro-active maintenance is up to date data on the machine status, obtained with two well-tested frontline techniques. Vibration severity monitoring according to ISO standards diagnoses general machine condition. Shock pulse monitoring with the True SPM® Method gives early warning of bearing deterioration, the most common cause of machine failures.
Root cause elimination is true preventive maintenance. A poorly aligned and balanced machine wastes much energy and wears itself out. Do not tolerate excessive noise, vibrations and failure rates. Leonova is a state of the art maintenance tool for fast and easy alignment and balancing.
Bearing condition
The True SPM® Method
SPM’s shock pulse method is the only successful monitoring technique specialising in rolling element bearings. It presents accurate information on the mechanical state of the bearing surfaces and of the lubrication condition, throughout the bearing´s lifetime. Installation faults and poor lubrication, the root cause of many bearing failures, are easily detected.
SPM Spectrum™
This is a unique feature, an efficient tool for detailed bearing condition analysis. A time record of the signal from an SPM shock pulse transducer is subjected to an FFT analysis. This provides a spectrum that is compared with the rotational frequencies of the bearing parts. In addition, it can identify other periodic shock sources such as gear damage.
Journal bearings
Orbit Analysis
For all machines with journal bearings, simultaneous measurement with two vibration transducers supplies an accurate graph of the shaft centre line movement.
Resonance
Structural Resonances
Run up/Coast down measurement and Bump test are tools for root cause analysis. They show the machine frame vibration characteristics, resonance frequencies and the reaction at critical speeds.
Overall vibration
Vibration Severity plus FFT Spectrum
Leonova measures vibration velocity, acceleration and displacement according to the latest ISO 10816 standards, with menu selection of all specified machine classes and their alarm limit values. In addition to the RMS vibration readings, Leonova displays an FFT spectrum, where you can easily identify the symptoms of imbalance, misalignment and structural weakness.
Vibration Analysis
EVAM® supplies pre-programmed evaluation models and nine vibration parameters, including crest factor, kurtosis and skewness. FFT analysis produces a 12800 line spectrum up to 40000 Hz, with true zoom and enveloping. Menu selected fault symptoms highlight the relevant frequency lines and supply trendable fault symptom values.
Corrective maintenance
Precision Shaft Alignment
Leonova uses a special line laser technique for the alignment of both horizontal and vertical machines. The LineLazer kit contains detector units and fixtures. For easy and accurate targeting, the detector units send horizontally spread laser beams against large vertical receptors. Only one connecting cable to Leonova is needed. The laser beam is coded to guard against interference from other light sources.
Automatic precision inclinometers constantly measure the angular shaft position. Three measurements over a shaft rotation angle well below 180 degrees determine present alignment. The graphical interface guides the user through the alignment procedure to a perfect result. For vertical adjustment, use stainless precision shims from SPM.
Dynamic Balancing
With Leonova, single and dual plane rotor balancing in accordance with modern standard methods are easy operations. Like machine alignment, the function is available for either unlimited use or on the "Function and Use" basis. You can apply the traditional four run technique or the two run method with time synchronous measurement triggered by a tachometer connected to Leonova.
Easy to operate
Leonovas supporting functions make it easy and reliable to conduct field balancing. It saves an influence matrix, which allows fast re-balancing calculations without stopping the machine to attach a test weight. An initial vibration measurement with spectrum analysis clearly shows the existence and extent of imbalance, and thus the need for and probable success of a balancing operation.
Features and Benefits
Leonova calculates the suitable trial weight and suggests a number of alternatives for correcting the imbalance. Correction mass, with the trial weight removed or remaining in place, can be radially displaced and split between two of the rotor partitions. For weight removal, drill hole diameter and depth for various materials are given. Weight position is displayed as angle or distance measured along the rotor circumference. All correction masses on the rotor can be replaced by one.
For all methods, a final run can be made to check the balancing results and, if needed, save a data file for further adjustments.