Lincoln ZPU 08, Руководство по эксплуатации, Страница: 39 / 57

Operating Instructions
Pump ZPU 08 ATEX
810-53711-1 Page 39 / 57
Rev.: 003
31/07/2017
Operating principle:
The gear reduces the motor speed to
the necessary speed of the pump.
The eccentric shaft drives the high-
pressure pump elements and the
stirring paddle. The stirring paddle
homogenizes and vents the lubricant.
The high-pressure pump element
works as a piston pump with two
counter-actively acting pistons that
alternately take in lubricant and
dispense it via the outlet bore to the
pressure line. The outlet channels of
the high-pressure pistons are
controlled by a floating valve piston.
The pump element is driven via a
hollow shaft with eccentric pin and
switch roll, whereby the rotational
movement is transformed into an
oscillating linear movement of the
pump pistons.
This type of drive allows to select or
change the rotational direction of the
pump shaft as needed.
The lubricant supplied by the pump
element is dispensed to the
pressure-line connection via a check
valve and a lubricant filter.
One respectively two sensors
determine the reservoir filling level
(low-level respectively high- and low-
level indication).
Upper end position
Start of the piston movement
downwards
Downward working stroke
Supply piston 1 displaces the
floating piston upwards together
with the lubricant in front of it.
Lubricant is supplied into the
pressure line via the open outlet
bore. Supply piston 2 generates
a negative pressure that sucks
in lubricant after opening bore II.
Lower end position
Start of the piston movement
upwards
Upward working stroke
By means of the lubricant of the
previous suction stroke, supply
piston 2 displaces the floating
piston downwards.
Lubricant is supplied into the
pressure line.
Supply piston 1 sucks in
lubricant.