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NORDIC SUPPLIER FOCUS
Designed to minimise friction and wear, the
HTL 201 EEX is operated via the hydraulic system
of a superior machine or carrier system and
supplies lubricant as long as that machine or
carrier device is active. The HTL 201 EEX is based
on the proven Lincoln HTL 201 hydraulic tool
lubricator concept and includes a grounding point
Hägglunds (Bosch Rexroth) direct
drive system on a conveyor
to discharge electricity immediately, if needed.
Compact and durable, the HTL 201 EEX is easy
to install and maintain. Its refillable reservoir
holds 1.5 litres of NLGI grade 2 grease. The pump
unit has an integrated throttle to adjust the
lubricant output, and it accepts progressive
metering devices.
SKF has great experience in this field and
recently secured a contract with Las Bambas
mine in Peru (IM, February 2016, pp30-35) to
speed within its speed range – without
restriction. This allows soft starting sequences
that minimise belt stress, for example, but also
torque to maintain a requested material flow.
This not only reduces wear on the belt, belt
rollers and pulley bearings, but also increases
fine positioning when inching the belt in forward
or reverse to inspect or replace it.
In a conveyor system, of course, speed
capabilities are closely intertwined with torque.
Hydraulic direct drives are capable of starting up
overall efficiency.
Perhaps the most remarkable aspect of
hydraulic direct drives is the way they achieve
these benefits within a very limited space, which
from rest with a full load, and of accelerating it
under the most extreme load scenarios. This is
ensured by the very high starting torque, which can
also be maintained for an unlimited period of time.
The other side of the equation is hydraulic
direct drives’ monitoring and limiting of torque.
This function provides built-in overload
protection, eliminating the risk of undue stress
on conveyor components. The conveyor can be
started and stopped as often as required, without
affecting the service life of the belt or wearing
the machinery in general. This is done easily via
the control signal to the pump, without having to
stop and restart the electric motor.
With their unique combination of variable
speed control, sustainable torque delivery and
protective torque limiting, hydraulic direct drives
have yet another benefit. In short, they enable
process optimisation beyond any other drive
technology. At times when there is a lower load
on the conveyor belt, for example, it is possible
to slow the belt speed and employ greater
is often all that it is available on site. Between
their compact motors and the small footprint of
their flexibly placed drive units, their installation
is truly minimal. Moreover, the mounting of the
motor directly on the pulley drive shaft means
alignment problems are eliminated.
Because the design of hydraulic direct drives is
modular, it allows an optimal solution to be sized
and tailored for any conveyor, small or large, from
a few kilowatts up to megawatts of installed
power. Moreover, that solution can be adjusted
down the line. With their flexible nature,
hydraulic direct drives are easy to upgrade or
adapt as needs change and develop over time.
Oiling the wheels
cost effectiveness.
The two-year agreement with Las Bambas
includes engineering, planning and scheduling,
execution and management of all lubricationrelated activities for the electric motors. In
addition, SKF will supply lubrication system
components and tools to the mine.
“As part of its reliability program, Las Bambas
needed to ensure worldclass lubrication of its
electric motors,” said Service & Ups elling
Manager Carlos Lahura of SKF Peru. “Mine
personnel contacted SKF to develop a series of
integrated lubrication solutions for the rotating
machinery and were impressed by our expertise
and commitment. As a result, SKF was engaged
to provide lubrication management services as
well.”
The ultimate SKF Three-Barrier Solution,
consisting of sealed SKF Explorer spherical roller
bearings, housings and SKF Taconite seals, has
SKF has just introduced its Lincoln HTL 201 EEX
hydraulically driven pump for use in volatile
applications, such as underground mining.
Featuring a steel pump body and lubricant
reservoir, this unit is a cost-effective alternative
to expensive electrically driven pumps that must
include a cabinet for protection.
provide lubrication management services for all
electric motors in the mine’s concentrator.
Optimising rotating equipment performance in
this way with lubrication solutions engineered
specifically for Las Bambas, SKF is supporting
mine operator MMG in improving reliability and
also been deployed for the mine’s overland
conveyor belts, with shafts measuring between
500 and 700 mm. The bearings and housings
provided will have integrated sensor positions for
4 must-attend mining conferences in 2016
April 11-13, 2016 | Vancouver, Canada
October, 2016 | Lima, Peru
June 5-8, 2016 | Vancouver, Canada
October 31-November 2, 2016 | Vancouver, Canada
www.ConferenceMine.com
56 International Mining | MAY 2016