Pump Drives

The fundamental elements on the selection of a pump drive
are:-
1) The number and type of pumps.
Depending on the overall dimensions of the pumps and
associated pipework it is possible to establish the maximum centre distances required.
2) Maximum torque requirement of each pump output.
Verify that the maximum torque requirement is below the maximum value for each chosen pump or combination of pumps.
3) Maximum input torque.
Verify that the maximum input torque is below the maximum
indicated value for the particular model. In the case of a pump drive fitted with an over-centre clutch (models BD and BDS) it is important that the input torque is at least 20% below the maximum transmittable for that particular clutch.
4) Maximum input speed.
Verify that the maximum input speed is below the maximum
value indicated for that particular model.
Check that the pump direction of rotation is opposite to that of the prime mover.
5) Service factor.
A suitable safety factor should be applied to ensure the Integrity of the drive.
COOLING
With reference to the Maximum Permissible Input Power table
on page 12 of this catalogue in conjunction with the anticipated
duty cycle and unit operating ambient temperatures will
indicate whether a cooling system will be required.
It is always advisable to check the actual pump drives oil temperature during the first few working hours to ensure that the oil temperature does not exceed 105°C for synthetic oil, 80°C for mineral oil.
For types AM 220, 230, 232, 330, 345, 365 and 450 a cooling system is readily available. This comprises of an oil circulation pump that is driven from the pump side of the input shaft together with either a water/oil or an air/oil heat exchanger.
Such a system allows for a higher continuous working power to be used.