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| Industrial
products |
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Michell Bearings provide a complete service covering initial
assessment, conceptual through to detailed design, manufacture
and through life systems support.
Michell Bearings' industrial products include bearings for:
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Industrial gearboxes |
Horizontal and vertical shaft electrical machines
Photo on right courtesy ABB
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Turbo-compressors |
Horizontal and vertical shaft hydro-turbine
generators
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Gas and steam turbines |
Horizontal and vertical shaft pumps and Fans.
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| Other
industrial applications |
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Michell can provide bearing designs to meet
the most stringent of industrial specifications including
steel mill drive motors , nuclear power stations, petrochemical
plants and offshore installations.
Photo on right courtesy of Sulzer
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| Whitemetal
(or babbitt) faced thrust and/or journal bearings can be supplied
complete with their own housings or as internal parts only. |
For standard
specifications, Michell have a series of modular horizontal
and vertical bearings including "M" Range Horizontal
Bearings complying with ISO Standards. Other catalogue standard
products include thrust and journal bearing internals for which
the casing is integral with the customer' machine. These products
lend themselves towards strategic agreements. |
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Of the many notable industrial contracts, some
of the more recent include bearings for the SSAB Borlange
Steel Mill , Hoogevens Steel Mill, the Ghazlan Desalination
Project, European Transonic Wind Tunnel, and Rosal Hydro.
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Michell Bearings can also manufacture product in accordance
with customer generated designs and specifications.
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| PTFE
faced thrust bearings |
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A major advancement in hydrodynamic bearing
technology was made in 1997, aimed primarily at hydropower
plants, with the launch of Polytetrafluoroethylene (PTFE)
faced bearings as an alternative to traditional whitemetal
(babbitt). These pads are similar in construction to whitemetal
(babbitt) pads except that the whitemetal layer is replaced
by a composite layer of compressed copper wire and PTFE. In
this arrangement the PTFE is extruded into the copper wire
to form a mechanical bond and the copper wire in turn is soldered
to the steel backing material of the pad, thus forming a metallurgical
bond.
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| To date,
Michell have successfully installed PTFE faced thrust bearings
in hydroplants located in the UK, Japan, Greece, Canada, and
Hungary. |
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advantages of PTFE bearings are: |
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Increased load
carrying capacity resulting in smaller bearings or increased
safety margins |
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Superior friction
and wear characteristics |
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Elimination of
high pressure jacking systems (this can be accommodated
for maintenance purposes if required) |
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Reduced power losses
by reducing bearing size |
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More tolerant material
with respect to surface damage |
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Reduced overall
costs (smaller shaft forgings, smaller bearing housings,
smaller lubrication systems, no high pressure oil injection,
smaller cooler) |
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Electrically insulated
bearing (with PTFE faced journal pads) |
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Lower braking speeds,
resulting in reduced brake dust contamination |
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| Industrial
product reference |
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