Filter
Top Products
unigreen 17
WORK TEMPERATURE
Heat is generated by the friction between the various moving components and on
the basis of the power transmitted. The temperature
of the multiplier or disengaging box depends on the capacity to dissipate heat to
the surrounding environment and therefore the surfaces involved in the heat
exchange and the environmental conditions.
The specifications refer to environmental conditions with a temperature between
-10° +50°C (14°C -122°F).
The working temperature limit of the box is 90°C (200°F) established to prevent the
ageing of the seals and guarantee a sufficient viscosity of the oil. The heat makes
the air in the box expand and therefore increases the pressure inside. The correct
use of the oil seals is guaranteed up to an internal pressure of 0.5 bar. Boxes
designed to be used for particularly heavy duty work are equipped
with a breather cap that can be fitted
on any cast iron box on request.
5.3 BLOWER GROUP WITH FRONT SUCTION
These models have front suction with delivery of the air obliquely to the rear of
the machine. This characteristic guarantees greater penetration into the veg-
etation (see fig. 20A-20B)
There are two models of blower groups with front suction:
- Axial fan: used for treatments similar to traditional multiplier blower groups,
with delivery of the air in a circular crown (fig. 20A-B).
- Tangential fan: for use in small and medium espalier rows of vines. There
are pulley drive versions or multiplier versions, adjustable jets can be mounted
to spray the vegetation at various heights.
The vanes of these blowers have an inclination that can be adjusted by 5°, with
positions from 20° to 40° (as standard this is set at 35°); to adjust the inclina-
tion you have to order the appropriate adjustment discs. This operation must
only be performed by qualified personnel respecting the position of the single
vanes so as not to vary the dynamic balance of the fan; unbalanced blowers
can cause rapid wear of the multiplier and the fan rotor itself making the ma-
chine unsafe.
5.3.1 SINGLE-SIDE BLOWER GROUP
The sprayer can be equipped with a single-side blower group like the one
shown in figure 21. The operating principle is similar to that of the blower group
with front suction, the only difference being that the treatment is only on one
side.
5.4 AXIAL ROTOR
Generally the new models of rotors are fitted with 7 vanes made of aluminium
or nylon + fibreglass and the vanes have a variable inclination from 20° to 40°
with step adjustment by 5° (in some cases there are drilled reference discs)
FIG. 22.
The angular movement of all of the vanes, if done correctly, doesn’t change
the dynamic balance of the blower group.
To change the inclination of the vanes (as standard this is set at 35°) proceed
as follows:
a) Remove the protective grill.
b) Unscrew screws A that hold the spinner (central cover), each vane has
two blocking screws B at the side, one on the right and one on the left.
Unscrew the two screws enough to turn the vane the degrees necessary
(replace the drilled discs when fitted). To make the adjustment easier, there
are reference notches on blocking element C.
c) After you have positioned the vane, perform the same operation on the
next one and screw the screws of the first in enough to block it in place.
d) Repeat the operation on all the vanes and after you’ve checked that all
have the same angle, reassemble the spinner and the protective grill.
The fan is balanced dynamically; the different numbers of washers under the
screws blocking the vanes are for balancing.
You shouldn’t change the position of the washers or add or remove any. Only
tighten down the screws with moderate force as they have an aluminium
thread.
FIG. 22
FIG. 20A
FIG. 21
FIG. 20B
drilled reference disc
(only fitted models)