- +27 79 866 5061
solutions@resatech.co.za
Our solutions cover a wide range of monitoring solutions for your gas and steam turbines, wind turbines, gearless mill-drives, hydro-generators, pumps, fans and cooling towers. Our sensors, acquisition systems and condition monitoring software provide key information for the protection and monitoring of your assets. Our monitoring solutions include shaft and bearing vibration, axial thrust position, magnetic flux, airgap monitoring, runner clearance and roller bearings monitoring.
Each machine is unique, and each customer is different, and we profoundly respect their individuality. Whether you have one single machine needing simple monitoring system or a complex infrastructure with multiple machines requiring sophisticated monitoring solutions, we are your partner. For us, customising also means that your existing infrastructure can benefit from the high quality data we deliver through our open and extended interfaces.
The selection of the right sensor is crucial for successful implementation of monitoring systems. We can guide you in this difficult task. Operational environment is especially important. MC-M provides special sensors like airgap, fibreoptic or magnetic flux, which can be installed inside high electrical and magnetic fields. Our runner clearance probes are specially designed to be resistant to abrasion. Sensors characteristics must be suitable for the environmental and physical properties.
The sensitivity and the frequency range are important parameters to consider. Electrodynamic sensors are well suitable for the measurement of low frequency signals. However, piezoelectric sensors may be used for the measurement of wide dynamic range of signals. Our experience helped us develop a wide range of monitoring solutions for the electrical and mechanical parts of your machines. For your monitoring projects, working with us means: one contact partner and one integrated solution.
Magnetic flux monitoring measures the flux of each rotor pole to detect faults in the magnetic field homogeneity. Such failures can be explained by short-circuit in a specific pole. This failure can reduce the operating efficiency or generate high vibrations due to magnetic unbalance. Hall effect sensors may be used for the monitoring of generator with a large number of poles (GMDs or hydro generator)
• Magnetic unbalance
• Pole mechanical instability
• One magnetic flux sensor installed onthe stator
• MPS: Maximum absolute flux deviation between two opposite poles or two adjacent poles
• CMS: Flux profile, absolute flux deviation
• Gearless Mill Drives
• Hydro Generators
• Turbo Generators
• Wind Turbines
• Magnetic Field Transducer
Airgap monitoring measures the distance between rotor and stator of generators (hydro generators, GMDs, Windmills). Rotor and stator shape and location are affected by operating centrifugal, thermal, and magnetic forces. Off-centre or out-of-round conditions might reduce operating efficiency. In more severe cases, they might lead to damage from magnetically induced heating or rotor-to-stator rub.
• Rotor-to-stator rub
• Pole mechanical instability
• Loss of operating efficiency
• Magnetic unbalance
• Thermal hotspots
• Depending on the stator size, between 4 to 16 airgap sensors installeduniformly around the stator core
• MPS: Minimum gap per revolution
• CMS: Pole profile, stator shape, rotor shape, stator and rotor centre position, minimum gap position, polestability
• Gearless Mill Drives
• Hydro Generators
• Wind Turbines
• Air Gap Transducer
Axial thrust position monitoring detects thrust bearing deterioration and failure, which might lead to total destruction of the machine. Such failures can occur with very little warning and within an extremely short period of time. Axial thrust position monitoring is applicable on hydro, steam or gas turbines.
• Wear of the thrust bearing
• Leakage of hermetic seals
• Redundant relative shaft displacement sensors
• MPS: Mean displacement deviation
• CMS: Mean displacement deviation
• Gas and Steam Turbines
• Hydro Generators
• Proximity Probe
Roller bearing monitoring detects failures such as pitting on the ring path, wear of the outer ring path or rolling element bearings fault which might lead to unplanned shutdown and machine damages. Monitoring methods are specified in the VDI-Norm 3832. Broadband characteristic values such as RMS, crest factor, BCU … exhibits condition deterioration in trend curve with respect to alarm limit. Frequency-selective characteristic values in the envelope curve spectrum provide specific diagnosis information.
• Wear of roller bearings
• 2 piezoelectric sensors installed at 90° - X/Y in the radial direction.
• MPS: Broadband characteristic values (RMS, BCU …)
• CMS: Frequency-selective characteristic values (Envelope spectrum)
• Pumps, Fans and Cooling Towers
• Piezo-electric Accelerometers
Shaft radial vibration amplitude and radial position are primary indicators of the overall mechanical condition of rotating machinery. It is possible to detect many machine malfunctions including, rotor imbalance; misalignment; bearing wear and rubs with such measurements. Some machine types produce vibrations that are not easily detected by measuring shaft relative dynamic motion in relation to the bearing.
• Mechanical unbalance
• Misalignment
• Damages or wear of plain bearings
• Various tribological issues on plainbearings
• 2 proximity probes or absolute vibration sensors installed at 90° - X/Y located in the radial direction.
• MPS: Min gap
• CMS: Blades profile and polar view
• Pumps, Fans and Cooling Towers
• Hydro Generators
• Gas and Steam Turbines
• Linearized, Accelerometer and Proximity Transducers
Runner clearance monitoring measures the distance between turbine blades and throat ring. Turbine and throat ring are affected by operating hydraulic forces. Off-centre might reduce operating efficiency and in more severe cases may lead to damage from turbine-to-throat ring rub. Runner clearance monitoring is applicable on large vertical hydro turbines.
• Turbine-to-throat ring rub
• 4 sensors uniformly installed around the throat ring, flush mounted.
• MPS: Min gap
• CMS: Blades profile and polar view
• Hydro Generators
• Runner Clearance Probe
