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On-site machining: power plant project list

Posted by Alan Hillier on Nov 15, 2016 9:03:00 AM


    

 

turbine-assembly.jpg

When you consider the demands that turbine components in power plants are exposed to, it comes as no surprise that eventually many components will wear out and operate less efficiently. With steam turbine temperatures being of over 500°C, pressures of 4000psi and components rotating at speeds of over 3000rpm, the importance of a well-managed and robust maintenance programme cannot be overstated.  (Find out more about power plant maintenance strategies on our previous blog post).

What are the potential problems?

With turbines, the danger signals to watch out for include unusual vibration, noisy or unusually hot bearings, gland leakage, governor hunting, and lubrication problems such as low oil pressure, discoloured oil, or a broken lubricator.

Fixing the above can involve the use of on-site machining tools and to help you select the right machine for your next project. Below, we’ve listed machining applications and matched these to the relevant machine type from the Mirage range.

View the table below, of if you prefer you can download a Pdf version here.

 POWER PLANT MAINTENANCE PROJECT

 ON-SITE MACHINE TO USE
BEARING PEDESTALS  
Machining the flat base of bearing pedestals Milling Machine
Machining the inside diameter of bearing pedestals Small Line Boring Machine
TURBINE CASINGS  
Machining of surfaces in large diameter turbine casings (LP casing)

Large Line Boring Machine

or Mirage WB1500
Casing split line surfaces (steam turbines, LP, MP, HP) Milling Machine
Creating sealing groves on turbine casings Milling Machine
Machining of internal grooves in turbine casings Flange Facing Machine

Machining surfaces for glands in the turbine casing

Small Line Boring Machine
TURBINE BLADES  
Drill out turbine blade retainer pins PD760 Pin Drill (bespoke product)
Cutting worn and damaged turbine blade tips BLS760 Blade saw (bespoke product)
DIFFUSORS  
Machining valve chambers (diffusors) Small Line Boring Machine
Machining of large diffusors Large Line Boring Machine
Machining of valve chambers (upper surface) Flange Facing Machine
SHAFT MACHINING  
Turbine shaft Mid Shaft Turning Machine
Generator Shaft Mid Shaft Turning Machine
COUPLINGS AND HOLE BORING  
Wicket gate bearing hole boring Large Line Boring Machine
Boring of generator couplings Large Line Boring Machine
Machining of coupling holes Small Line Boring Machine
HEAT EXCHANGERS  
Face Machining Flange Facing Machine
Back Face machining Flange Facing machine (with Back Facing Kit)
Division Slot Machining 2 axis milling machine
HYDRO PLANTS  
Machining of large turbine casings in hydro power plants (turbine face plate & seal ring machining) Large Line Boring Machine
Stay vane machining 3 axis milling machine
Downhole repair (Machining turbine unit in-situ) Flange Facing Machine
DIAPHRAGMS  
Machining of the internal grooves for small diaphragms Small Line Boring Machine
Machining for diaphragms Flange Facing Machine
PIPELINES  
Cutting pipes Split Frame Clamshell Cutters
Pipe bevelling Split Frame Clamshell Cutters
Counter-boring Split Frame Clamshell Cutters
Flange removal Split Frame Clamshell Cutters

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Visit the new Buyers Guide download section

The above is just a selection of potential applications. If you need equipment for an on-site machining project visit our resources section where you can ownload our buyers guides, or if you want to discuss your project get in touch with us here.

Topics: On-site machining, power plant maintenance

   

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