Functional Description - ProMinent Makro/ 5 Operating Instructions Manual

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Functional description

Power end functional description The Makro/ 5 metering pump is a motor-driven metering pump with
a kinematic gear.
A motor drives the cam shaft (1). A connecting rod (2) rests on the
cam shaft (1) which allows the oscillating crank (4) to rotate about
a variable pivot point, see Fig. 8. The lifting arm of the oscillating
crank, which lies above the pivot point, moves the slide rod (8)
which itself drives the liquid end.
The stroke is adjusted using the manual adjustment wheel (7). This
causes a spindle (6) to move the fork (5; shown in cutaway view in
the diagram). The fork (5) moves the sliding block (3) in a groove
cut into the oscillating crank (4). The sliding block (3) determines
the pivot point of the oscillating crank (4). This determines the
stroke length. When the pivot point of the sliding block (3) is
directly above the axle of the slide rod (8) the lifting arm of the
oscillating crank above the pivot point is at zero and the slide rod
stops. When the sliding block (3) is pushed down, the lifting arm of
the oscillating crank (4) above the pivot point is greater than zero
so that the slide rod (8) is driven
Liquid ends can be fitted to both ends of the slide rod. They then
operate in push-pull mode (Boxer principle).
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6
5
4
3
2
Fig. 8: Cross-section through the power end
1 Cam shaft
2 Connecting rod
3 Sliding block
4 Oscillating crank
5 Fork
6 Spindle
7 Manual adjustment wheel
8 Slide rod
Functional description
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