Turbine Repairs

How We Carry Out Steam & Gas Turbine Repairs With Minimum Downtime!

With portable equipment our technicians come to your generating station to repair worn or damaged:- Turbine and Alternator Journals, Hydrogen Seal Faces, Main and Exciter Sliprings, and other parts of your generating equipment.

We also repair:- Turbine Rotor Bores and Turbine Casings quickly and cost effectively In-Situ, using our specialist equipment.

In the case of Turbine Journal repairs our patented Orbital Equipment rotates around your stationary shaft.

The Benefits!

We come to you:- You do not have to make plans for transport of your turbine shaft to a workshop.You do not need to remove the shaft from the casing. You do not need to rotate or lift the shaft within the casing.

We save you time:- Some of these repairs can be carried out in as little as 24 hours.

We save you money:-The equipment does not have to be stripped down and transported or re-assembled. The savings on this alone are usually very significant.

We keep your plant running:- Downtime is minimised so that you can be back in production and earning money much sooner.

• We repair turbine journals that have suffered a failure, in-situ using our orbital turning and grinding equipment.
• Referencing the radii or parallel shaft at either end of the damaged turbine journal we machine and polish the bearing area back to the OEM's original specification.
• The most critical tolerance in such high speed shafts is the concentricity which is usually required within 0.013mm TIR.
  

• We cover standard turbine journal diameters from 75mm up to 800mm.

 Hydrogen Seal Face Repairs

• Machining and grinding of Hydrogen seal faces is performed in-situ to repair scoring and any swash present in the face.
• We have designed equipment over the years to cope with almost any configuration and size of face.
• Flatness will be held within 0.025mm TIR (with respect to datum’s provided) with a measurable surface finish of 0.3mm Ra.

• Generator and Exciter sliprings which exhibit signs of burning and scoring, can be repaired in-situ.
• The refurbishment of steel or copper sliprings of any diameter or length is accomplished by several different techniques. These include machining and polishing, grinding, linishing and honing.
• We repair the sliprings while stationary or on barring. We can provide equipment to rotate the complete shaft if barring gear is not fitted or has the incorrect speed.

• Helical cooling grooves can also be re-cut in-situ.

  FATT (Fracture Analysis Temperature Test)

• Fatt (Fracture Analysis Temperature Test) samples can be removed on site using our proprietry equipment.
• This service is regularly carried out for our Power Generation customers and involves the removal of a doughnut shaped piece of metal from the end of turbine shafts (and other locations) which is then taken away for end of life or life extension analysis.

• We can internally hone the bores of Turbine Rotors in-situ to prepare the internal surface for subsequent Boresonic Examination.
• The process will eradicate scoring and corrosion damage and can remove up to 2mm on diameter or more if required.
• We can cope with rotor shafts up to 30 Metres in length provided we have access from both ends.

• Our service comes complete with a bespoke mounting platform and traverse system to enable rapid site establishment.

• We carry out the Milling of turbine casing keypockets and the drilling and reaming of locating dowel holes.
• We also perform the boring out of turbine blade roots.
• Milling of sealing strip grooves in turbine covers.

• Thermal Spraying.
• Stud Removal.
• Non Destructive Testing.
• Optical and Laser Alignment.