Steam Turbine Repairs Turbine Repairs

We carry out on site machining, in situ machining and portable machining including turbine shaft grinding worldwide. Services Available World-wide.
On site machining and in-situ machining (including turbine jounal grinding) carried out worldwide, 24 hours a day 365 days per year.
Turbine Repairs for the Marine, Power Gen, Petrochem, Process and General Industries 365 days a year.

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  In-Situ
Our Power Toolbox containing In-situ machining, on site machining and portable machining (including turbine journal grinding) in the Power Generation repair world. 
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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.

 

Turbine Journals & Alternator Journals
500mm diameter Turbine Journal being Machined

Machining of a 500mm diameter Turbine Journal
Large Picture
  Tolerances
Achieved
What is a Turbine Journal?
Top of Page
  • 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.

Need undersized bearings?
 
  • We cover standard turbine journal diameters from 75mm up to 800mm.

Top 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.

  Tolerances
Achieved
What is a Hydrogen Seal?
Top of Page
Hydrogen Seal Face Being Machined

Hydrogen Seal Face Being Machined
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Need undersized bearings?

Completed Seal Face
 
 Slipring Repairs (Main and Exciter)Top
In Situ Machining of Main Sliprings

In Situ Machining of Main Sliprings
Large Picture

  Tolerances
Achieved
What is a Slipring?
Top of Page
  • 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.

Top  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.
 
What is a FATT Sample?
Top of Page
Machining a FATT Sample on site.

Machining a FATT Sample on site.
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  Honing of Turbine Rotor BoresTop
Internal Honing of Turbine Rotor Shaft.

Internal Honing of Turbine Rotor Shaft.
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  Tolerances
Achieved
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  • 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.
Turbine Casing Machining Top
  • 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.
 
Top of Page
Milling a Keypocket on a Turbine Casing.

Milling a Keypocket on a Turbine Casing.
 

 Enlarge Picture
 
We Also Offer The Following ServicesTop
  • Thermal Spraying.
  • Stud Removal.
  • Non Destructive Testing.
  • Optical and Laser Alignment.


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