The tungsten alloy crankshaft is placed on
the balancer and spun to determine the points where metal needs to be added or removed.
The balancer indexes of the crank show the exact position and weight to be
added or subtracted. The electronic brain inside the balancer head does the
calculations and displays the results. The tungsten alloy crankshaft
counterweight is done by two inserts which are made of tungsten alloy, to
improve acceleration. Common method is adding light elements such as silicon to
reduce the weight of the crankshaft.
Tungsten alloy crankshaft brick typically
connects to a flywheel, to reduce the pulsation characteristic of the
four-stroke cycle, and sometimes a tensional or vibration damper at the
opposite end, to reduce the torsion vibrations often caused along the length of
the crankshaft by the cylinders farthest from the output end acting on the
tensional elasticity of the metal.
Using tungsten alloy crankshaft brick can
also be cost effective with some crankshaft designs. Since the raw steel stock
needed for the crankshaft can be much smaller if it does not need to include
the counterweights. It also makes it easier to machine the crank pins hollow
without having counterweights in the way.
With regards to tungsten’s properties, it
is a very dense metal with a high Moe, so it makes a more compact counterweight
mass. If the counterweights are radically bolted, fatigue is not much of a
problem since the bolt loads are not reversing.
Tungsten alloy’s high density also gives
enhanced sensitivity by increasing the control of load distribution. What’s
more, tungsten alloy has high tensile strength and good creep resistance with a
high mass ratio, so tungsten alloy crankshaft brick will be the ideal to work
in a restricted space.
没有评论:
发表评论