Power take-off
87
Disconnectable power take-off,
crankshaft
Power take-off, ratio
1:1. Direction of rotation: Clockwise.
Always try to have the pulley hub installed as close
as possible to the power take-off housing. It is under
no circumstances permissible to install the pulley with
its centre further out on the shaft than half the length
of the free shaft.
The pulley should be formed in accordance with the
figure. This type of pulley can be placed in such a
way that part of the pulley covers the bearing hous-
ing, thus reducing the x-value, whereby the side load
can be increased.
Power take-off with reduction gear, ratio
2.8:1. Direction of rotation:
Anti-clockwise. Including support device.
A power take-off fitted with a reduction gear must be
fitted with a support device. See figure.
Disconnectable power take-offs are required if the
load is on from start or if it is required to disengage
the load while the engine is running.
Volvo Penta offers a range of power take-offs.
The over-centre toggle action assures smooth and
progressive engagement, locking the PTO securely
into the driving position.
If direct drive is used without a belt transmission or if
some output consumer is to be connected directly to
the crankshaft, TVCs must always be made first.
Calculations are carried out by AB Volvo Penta on
request.
Determine the output requirement, the maximum
torque and the engine speed required for the driven
equipment.
Calculate torque is obtained by using the formula
Mv =
Mv = Torque (kpm)
Ne = Output (hp)
n = r/min
Check that the output requirement does not exceed
the maximum permitted from the power take-off.
76.2 × Ne
n
Содержание D11 series
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