Mechanical Definitions |
Bend wheel : A wheel used to interrupt and change the
normal path of the conveying or driving medium. It is mostly
used to effect a change in direction of conveyor travel from
inclined to horizontal or a similar change.
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Bladder press : A machine which simultaneously molds
and vulcanizes a pneumatic tyre.
|
Block and tackle : Combination of a rope or other flexible
material and independently rotating frictionless pulleys.
It is also known as block and fall.
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Board drop hammer : A type of drop hammer in which
the ram is attached the wooden boards which slide between
two rollers, and when the ram falls freely on the forgoing,
it is increased by friction between the rotating, rollers.
It is also known as board hammer.
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Boiler draft : The difference between atmospheric pressure
and lower pressure existing in the furance or gas passages of
a steam generating unit. |
Boiler feed water regulation : Adding of water to the
steam generating unit at a rate that commensurate with the removal
of steam from the unit. |
Boiler heat balance : A boiler heat balance is a method
for the thermal energy entering a steam-generating system in
terms of its ultimate useful heat absorption or thermal loss.
|
Boiler tube : A boiler tube is a tube in a boiler that
carry water to be heated by the high temperature gaseous products
of combustion or that carry combustion products to heat the
boiler water that surrounds them. |
Bond's law : The work required for the crushing of solid
materials (rocks and ore) to the product size and surface area
and the lengths of cracks formed. It is also known as Bond's
third theory. |
Boring bar : A rigid tool holder used to machine internal
surfaces. |
Bottomed hole : A completed borehole, or a borehole in
which drilling operations have been discontinued. |
Box header boiler : A horizontal boiler with a front
header and rear inclined rectangular header connected by tubes.
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