Groeneveld EG1703P03, Общее руководство

Страница: 17 / 48

Automatic Greasing System Twin-3
Principle of operation 17
Da
te
of
is
sue
:
Ja
nu
ar
y 2
0
1
1
EG1703P03
2.4.1 Principle of operation
Two grease chambers are located in a metering unit (one for each primary grease line, A and B).
These chambers are filled with an exact amount of grease. When the actual greasing takes places
through one of both chambers, the grease is pressed from the chambers to the relevant grease
point. The principle of operation of the metering unit is explained in the four phases below.
Phase 1
In this phase the metering unit has not yet been filled with grease.
Figure 2.8 First phase
While in operation (system completely filled with grease) phases 3 and 4 will take place alternately.
Phase 2
During pumping phase A grease is pressed into channel A. While the grease pressure is built up,
piston (3) is pushed to the right, passed channel (1). The grease fills chamber (2) through channel
(1) and pushes piston (4) to the right.
Figure 2.9 Second phase
After a while, the pressure drops in the primary grease line-A (during the pressure decrease phase
of the greasing cycle). This has no influence on the metering unit.
ATTENTION
Do not open the metering units. Prevent intrusion of dirt and thus a possible cause of malfunction.
3 1 2 4
A