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3.7 Lubrication systems
Prelubrication metering device system
Relubrication distributor system
3.7.1 General
Gear pump units are generally used for single-line systems with
piston metering devices.
Single-line systems with piston distributors are total-loss
lubrication systems.
3.7.2 Total-loss lubrication systems
Total-loss lubrication systems feed clean lubricant (oil, fluid
grease or grease) to one or more lubrication points at specific
intervals (dependent on time or machine cycle) during the
lubricating cycle time (contact time, pump cycle time). The
quantity of lubricant fed is measured so that the lubrication
points are supplied with adequate lubricant during the total-loss
lubrication system's interval time to maintain a lubricant film
between the friction partners. The lubricant fed to the
lubrication point is partially consumed during operation due to
aging, evaporation, and leaks. An interval-controlled supply of
lubricant to the lubrication point is required in order to ensure
that the lubrication point receives adequate lubrication. Such
systems are referred to as intermittently operated centralized
lubrication systems.
Lubrication points cannot be cooled when using a total-loss
lubrication system.
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