The scanner is designed for Phased Array in-situ inspections. Performing the blade root inspection without dismantling the machine leads to tremendous savings in time & cost.
consistent & repeatable
Using a manual scanner with high resolution NDT data and precise position recording means reliable, high quality condition assessment of the turbine.
versatility by modularity
With its modular design the scanner can be adapted to almost every kind of blade. Also probe holders are designed in a way to be easily replaced or changed in configuration.
BRS - Blade Root Scanner
The last stage blades (LSB) of the low pressure turbine (LP) are among the mechanically most loaded parts in steam turbines. In particular the blade roots, which are fixing the LS blades against the tremendous centrifugal forces encounter very high stresses. During regular inspections of these zones the blades are unmounted and then inspected for cracks in the blade root using magnetic particle inspection (MPI). The whole procedure of taking out blades, inspecting them and re-mounting them onto the rotor takes several days. Thus this is done only at large inspection campaigns. We developed a method able to inspect the blade roots in-situ, i.e. without the need to unmount them. This leads to tremendous time savings as an opening of the machine is not required.
How it works
Phased array UT inspection (PA) has proven to be able to detect cracks at the critical location in the different serrations of the blade root. The probes have to be guided both along the airfoil as well as on the platforms accurately to provide reliable results. A scanner system was developed to move the probes along these probe paths in a robust and reproducible way. As the space in the turbine is very limited, the scanner is easy to handle with minimum equipment required. Both scanning one blade after the other as well as switching to the next scan path is done efficiently and intuitively. To cover the large variety of different LS blade types, a modular system was developed that allows for quick design adaptations to a new blade or - even more – to reconfigure the scanner by just replacing very few parts.
For simplicity reasons the approach is a manual scanner with encoder feedback. More or less the only part to be exchanged or redesigned for a new blade type is the individually curved rail, which both fixes the scanner on the blade edges as well as guides the probe holders accurately along the required path. Easy to exchanges probe holders facilitate the execution of different scan configuration and the flexibility to expand the system for the future.
- Modular system
- Easy to adapt to new blade types & geometries
- High precision scanning
RELATED PRODUCTS & SERVICES
Inspection Robotics empowers you with total automated inspection solutions tailored to your desired outcomes. Our advanced technology and service solutions deliver industry-leading value to your assets.
The Inspection Robotics PALM Scanner is a compact, lightweight and robust tool that uses ultrasonic phased array technology to reliably, efficiently and safely inspect the weld integrity of small diameter tube racks with clearance as narrow as 12 mm. see it in action get brochure fast & easy setup The set up time for LEARN MORE →
The PALM Flat is a compact, lightweight and robust tool that uses ultrasonic phased array technology to inspect the weld integrity of large diameter pipes up to flat surfaces. see it in action fast & easy setup The set up time for an inspection is less than one minute. The PALM flat comes in one LEARN MORE →
With a weight less than 3kg and its fully adjustable low pulsation flow it the simplest and most reliable couplant pump on the market. View Product Specifications simple The PUMP Unit is set up in seconds and easy to operate. Simply connect power cable and couplant piping and switch on the unit. no pulsation For LEARN MORE →
High resolution (up to 4096 cts / rev), exchangeable connectors and miniature design distinguish the Inspection Robotics encoder suite from the competition. View Product Specifications robust The basis of our encoder suite is a rotating magnet which is not harmed by water or dust ingression. The standard is IP54, can be increased on request. safe LEARN MORE →
This innovative scanner is using Phased Array (PA) technology to inspect the blade roots for flaws of all kind. The inspection can be performed in-situ, without the need of opening the machine and dismantling the blades. see it in action time saving The scanner is designed for Phased Array in-situ inspections. Performing the blade root LEARN MORE →
Accurate Ultrasonic, Phased Array (PA) or Eddy Current (EC) inspection of narrow gaps; This guided scanner is ideal for inspecting all kinds of shafts and rotors with radial gaps and slots. see it in action gap inspection On both sides the GAP Scanner has an adjustable and extendable side guidance which allows access of gap LEARN MORE →
Blade Root Scanner
|Storage temperature||-20…+70 °C|
|Operating temperature||0…+50 °C|
|Dimensions||648 x 72 x 108 mm
max. 648 x 107 x 186 mm
|Encoder Resolution||22.5 counts/mm|
|Probe holders for||airfoil inspection