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CHARACTERISTICS
The pump drives range of equipment allows a single or a multiple
of pumps to be driven from a single prime mover.
Single pump drives allow a pump to be close coupled to a diesel
engine that has a flywheel and flywheel housing in accordance
with SAE standards (non standard can also be accommodated).
Supplied in a kit format consisting of a bell housing fully machined
to suit the particular pump mounting and a flexible coupling
to suit the engine flywheel and particular pump shaft.
Multiple pump drives allow two or more pumps to be driven from
a single prime mover. Available in a number of mounting formats,
sizes and increasing and decreasing speed ratios. All models
may be close coupled directly to the prime mover (Model B) or
may be fitted with an over-centre clutch (except AM 365 and AM
480) for close coupling (model BD) or for independent mounting
(model BDS).
The multiple pump drive units are constructed from:-
» cast iron casings
» straight tooth gears
case hardened and ground (Shaved on AM216 - AM320 - AM220 - AM330
series)
» ball bearings
» case hardened shafts
» Viton seals on input
shafts
The input shaft is splined to the primary drive gear which transmits
the drive to the secondary gear on whose axis drives the pump.
The direction of rotation is therefore opposite from input to
output.
TECHNICAL
DATA
Ratio - Represents the ratio between the input speed (prime mover)
and output speed (pumps).
Ratios lower than one indicate the unit acting as a speed increaser
and higher than one acting as a speed reducer.
Note the output ratio is identical on all outputs ports of the
same unit.
Maximum input torque M1 (Nm) - Is the maximum torque which can
be transmitted by the input shaft to give a theoretical gear
life (L10) of at least 5,000 hours.
For units that are fitted with a clutch or a coupling the maximum
input torque may be limited by the torque capacity of the clutch
or coupling.
Each output maximum torque M2 (Nm) - Is the maximum torque that
can be transmitted by each output port.
Maximum speed N1 (RPM) - Is the maximum speed of the input shaft.
Moment of inertia J (Kg/m²) - Is referred to the input shaft
and is calculated in accordance with ISO standards.
SELECTION
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.
If in doubt contact jbj techniques Technical Department, telephone:
01737 767493 or email: info@jbj.co.uk
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.
DIESEL
ENGINE CONNECTION
For diesel engine driven applications the pump drives can be
supplied complete with all adaption kits for close coupling to
engines that have flywheel and flywheel housings conforming to
SAE standards. See dimensioned table on page 12 for relevant
data. Non SAE standard flywheels and flywheel housings may also
be accommodated.
In the case of an application incorporating a clutch, the clutch
pilot bearing is not an inclusive part of the clutch and has
to be specified separately.
INSTALLATION
Great care has to be taken in the mounting of the assembled unit.
Please refer to page 7 of the Pump Drives catalogue for application examples.
LUBRICATION
The pump drives are supplied without oil. Before use the units
must be filled with the appropriate grade of oil up to the full
mark on the dipstick. The oil capacities shown in the catalogue
are approximate quantities only. It is recommended that a gear
oil with a minimum viscosity of 95 and an EP additive be used.
Some suitable oils for use in specific ambient temperatures are
shown in the table on page 13 of this catalogue.
The oil must be changed after the first 50 hours of work and
subsequently every 1,000 hours or every 12 months whichever is
the sooner thereafter.
The oil level should be periodically checked and topped up if
required.
Related
links: Pumps, Bellhousings,
Coolers
and Heat Exchangers,
Hygroscopic Breathers
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