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HYDRO TURBINE REPAIR
WHAT IS A HYDRO TURBINE?
Hydro turbines are devices used
in hydroelectric generation plants
[https://www.energy.gov/eere/water/types-hydropowerturbines] . A hydro turbine is a rotary machine. It changes
the kinetic energy of moving water and the potential
energy of still water into mechanical energy. Water
turbines have been in operation in their simpler forms
since the eighteen hundreds. They were widely used for
industrial power before electrical grids became a reality.
Today, hydro turbines are primarily used for the generation
of electric power generation. This type of machinery is
well advanced and requires skilled hands to operate and
repair. Below we’re describing how hydro turbine repair
works.
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HOW DO HYDRO TURBINES
WORK?
First, it’s important to note how this advanced machinery
and technology works. Hydro turbines transfer the energy
from moving water [https://www.usgs.gov/specialtopic/water-science-school/science/hydroelectric-powerhow-it-works?qt-science_center_objects=0#qtscience_center_objects] . The water is moved to a rotating
shaft.
Hydropower plants capture the energy of
falling water to generate electricity. The
hydro turbine converts the kinetic energy
of falling water into mechanical energy.
Next, a generator converts the mechanical energy from
the hydro turbine into electrical energy.
TYPES OF HYDRO TURBINES
Second, there are different types of hydro turbines used
within the industry. The two main types of hydro turbines
are:
Impulse turbine
[https://www.daviddarling.info/encyclopedia/I/AE_impulse_turb
Reaction turbine
[https://www.daviddarling.info/encyclopedia/R/AE_reaction_tur
Which type is used in a hydropower project depends on
things like the height of standing (still) water called the
“head” and the flow, or volume of the water body at the
site of the hydropower plant. The choice also depends on
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how deep the turbine must be set, the efficiency of the
turbine, and the cost.
THE IMPULSE TURBINE
This type of hydro turbine uses the speed of the water to
move the runner and discharges. The water stream hits
each bucket on the runner or blade. There is no suction
on the downside of the turbine. Water flows out the
bottom of the turbine after hitting the runner.
The impulse turbine is best suited to the high head and
low flow applications.
THE REACTION TURBINE
This type of hydro turbine develops power from the action
of pressure and moving water working together. The
runner (blade) is placed directly in the water. The stream
flows over the blades instead of striking each blade
individually.
Reaction turbines are used at hydroelectric plant sites
where there are lower head and higher flow.
Turbines are crucial to hydropower. They may be one of
two different types: The Kaplan turbine or the Francis
turbine.
The Kaplan turbine
[https://www.renewablesfirst.co.uk/hydropower/hydropowerlearning-centre/kaplan-turbines/] —the most common
type—as blades made of stainless steel alloy.
Martensitic stainless steel alloy is strong and thinner
than the usual carbon steel alloy. This reduces weight
and provides an efficient flow of water.
In a Kaplan turbine, both the blades and the wicket gates
are adjustable, allowing for a wider range of operation.
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A Francis turbine
[https://www.sciencedirect.com/topics/engineering/francisturbines] has a runner with fixed buckets or vanes.
There are usually nine or more. Water is introduced just
above the runner and all around it. The waterfalls
through, causing the turbine to spin.
HOW ARE TURBINES
CONSTRUCTED?
Construction of turbines is the same—whether it is a
Kaplan or a Francis turbine.
A row of blades is fitted to a rotating shaft or plate. Water
passed through the turbine and over the blades, This
causes the inner shaft to rotate. The rotational motion
then transfers to a generator. The generator then
generates electricity.
WHAT CAN GO WRONG WITH
A HYDRO TURBINE?
Hydro turbine repair is difficult. For one, hydro turbines are
in constant motion, parts can break or wear out. Foreign
objects like tree branches and rocks and other debris can
enter the turbine with the moving water and damage the
blades or bearings on a hydro turbine. Turbulent water
caused by high winds or storms can increase water flow
to a point the turbines are stressed beyond their capacity.
REPAIR ISSUES
Hydro turbine repair is no easy undertaking. For one,
hydro turbines are huge, heavy pieces of machinery. They
are located in an area where they are hard to move for
repairs. Moving them requires special equipment.
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Hydro turbine repair on site is complicated by the size and
position of the turbines. Water surrounding them is also
an issue.
HYDRO TURBINE REPAIR SERVICES
Turbine repair service companies must be able to provide
complete machining services to turbine parts including
hydro turbine shafts and brake rings. Companies must be
able to remove old sleeves, create new sleeves, and weld
them into place.
Hydro turbine service enterprises must be able to
machine and polish bearing fits as well as cleaning,
detailing and re-cut flange faces.
HOW CAN CUTTING EDGE
HELP?
When it comes to identifying and
repairing hydro turbine problems, Cutting
Edge has trained and experienced
technicians who can use technology to
find and fix any hydro turbine problems.
Moreover, Cutting Edge has materials, machinery, and
professionals to deal with the large-scale projects of a
hydroelectric generating plant. They have the lift capacity
to extract hydro turbines from the generating plant site
and transport them to a Cutting Edge repair shop.
Founded in Onalaska, Texas, Cutting Edge utilizes its
6000sf fabrication shop. There the company is able to
customize machines and prepare for projects to be
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placed anywhere in America for its hydroelectric
generating customers.
Cutting Edge [https://ceomachining.com/] makes every
effort to complete repairs on site. This saves clients time
and money. Every second a hydro turbine is inactive
results in lost revenue for the company. Reducing repair
and transport time is a bonus. Thanks to modern
technology, our knowledgeable technicians can often
manufacture new sector cores, rehab bearings, and repair
or replace specific hydro turbine parts right on site.
KNOWLEDGEABLE HYDRO TURBINE
REPAIR
Our company [https://ceomachining.com/in-placemachining-company/] boasts some of the most
experienced and technically-advanced machinists in the
industry. Using our state-of-the-art machining equipment
[https://ceomachining.com/equipment/] , we aim to
complete every project safely, on time, and with
unparalleled quality. Cutting Edge is highly sensitive to and
reactive to the needs of its clients. The company works
hard to build satisfying long-term relationships with its
clients. No job is too large or small for Cutting Edge. They
specialize in everything from simple hydro turbine
maintenance projects to large-scale, challenging new
design and repair projects.
Cutting Edged is committed to ensuring that their
company will be the first—and only—business you call
when hydro turbine repairs and replacement parts are
required. Contact us [https://ceomachining.com/contact/]
for more information.
DECEMBER 16, 2019
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