CID oil-dynamic engines which develop a low
speed and high torque, are fitted with five
and seven radial pistons that ensure a high
level of uniform torque and speed.
They have a noiseless performance and a very
high torque, both at start-up and at operation,
with a maximum level in both rotation directions.
There is a minimum degree of inertia and mechanical
and volumetric yields are very high. All its
components are protected in order to have
a long lasting working life. In addition to
mineral oils, they can be used with non-inflammable
oils, fluids based on phosphoric esters and
water and glycol emulsions. Gears, pinions,
and other elements used to transmit movement
can be attached to the shaft extreme without
the need of additional supports. Due to its
robust construction, the shaft can bear radial
and axial loads.
Our oil-dynamic engines can be used in open
or closed circuits and can be activated by
means of pumps with pistons, gears and blades.
B 10 running life (see references below) –
It is the number of devices where it can be
expected that a 10% of the rollers show an
evidence that they are about to reach the
end of their useful life, while a 90% can
still be satisfactory. Average life is four
times B 10 life. A more exact data can be
calculated by means of the following formula:
The
monogram (the following graphic) shows the
B 10 rolling life of conical rollers used
in the engine to be considered. Application
example (see references below): Lateral load (W) = 255 Kg
working at a Distance (A) = 50 mm from
the assembly face. Pressure (P) = 210 Kg/cm²
at the engine inlet. Shaft speed (N) = 50 Rpm.
B10 estimated life = 2600
hours.
The following spotted-chain example begins
with the W lateral face in the vertical axis,
intercepts A distance, searches the P pressure
and cuts the corresponding N curve until the
horizontal line B10 is cut.
The monogram can also be used to estimate
the B 10 rolling life with zero lateral load,
beginning in the cycle, at the appropriate
pressure on the vertical axis, for example:
Pressure (P) = 210 Kg/cm². Shaft speed (N) = 50 Rpm.
Estimated B 10 life will be
= 8700 hours.
Monogram
to determine the working life of rollers
BV-350-450-600
MONOGRAM
REFERENCES
W =
Lateral load
A = Distance from
the load center to the assembly load
P = Pressure
