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A Large Mining Equipment OEM – Open Gear Lubricant Spray System

Customer Profile

A Large International Mining Equipment OEM for Ball and AG/SAG Mills

Application

Open Gear Lubricant Spray System to service a Ball Mill with a gear width of
970mm.

Issue

The previously used lubrication system only allowed the monitoring of the
air pressure to the spray valves and grease pressure in the mainline of the
Dual Line lubrication system. Unfortunately, this type of system does not alert the
plant operator if one or more of the eight dual line distributor valves are
malfunctioning or blocked.

With a large gear set like this the lack of an adequate boundary lubrication
layer could be disastrous leading to excessive wear and flank damage.

Lubrication Engineers Solution

Lubrication Engineers Australia redesigned the system to include the features
of a Bijur Delimon DR-4 Hydraulic Reversing Valve with operation of the internal
piston, monitored via a proximity switch, eight SDM Modular Dual Line valves
which are adjustable from 1-10 cc. Each valve is fitted with a proximity switch
to allow individual monitoring and a PLC is used to monitor all 12 inputs and 6
outputs.

The PLC, alarm warning lights, DR-4 Reversing valve and the Bosch modular air
control which includes two air solenoid valves, one air pressure switch, two air
regulators and lubricator are all housed in a stainless steel enclosure.

Results

The design of this system has now been adopted for all new and refurbished
open gear lubrication systems by the OEM.