Continuous automatic sealing machine, the reasons of belt slippage phenomena occurring in
packaging machinery belt in driving a & other;
Turn lost & throughout;
Phenomenon, this is a kind of can't prevent the phenomenon.
Because the belt is elastomer, its deformation size is changed with the change of the tension.
When vacuum
packaging machine belt on the driving wheel after AB interval, in the process of pulling it suffered from S1 to S2, so it is gradually reduce the tensile deformation.
Because of the pulley is in accordance with the normal rotation speed, and the belt is walking and shortened, so inevitable relative slide between them.
Thus, when the pulley of the belt in the edge of the tight and active point after A place will forward contracts, because of these reasons and make the leather belt movement behind the pulley.
the same phenomenon occurs on the driven pulley, but just the opposite, such as
automatic packaging machine, to bag vacuum packaging machine belt tension is increased gradually to S1, S2 belt tensile deformation is also gradually increase, so the belt on the pulley on the surface of the relative sliding in advance, the relative sliding occurs.
This is the belt & other;
The elastic sliding & throughout;
Phenomenon.
when the vacuum type
packing machine belt load increases tensile strength of the tight and loose while the difference is big, the sliding coefficient is bound to increase, and once when the load exceeds a certain limit, the friction between the belt and pulley is not enough to overcome the resistance of the driven wheel, it will cause the belt & other
Skid & throughout;
。
Belt by the elastic sliding to & other;
Skid & throughout;
Is a quantitative change to qualitative change, this kind of phenomenon marked the failure of belt transmission, it is not allowed.
Therefore, the design principle of the belt drive is based on no skid phenomenon under the condition of larger drag ability to calculate.
as said earlier, packaging machinery and equipment of the belt when the load increases, the tensile strength of the tight and loose while increasing the difference and also is the belt tension (
Or the circumferential force)
P = S1 -
S2 become larger and the sliding coefficient of 8 is bound to increase, we are through the experiment to determine the relationship between the P and 8.
the experiment, to a certain diameter of pulley, keep the belt tension in the early S.
Under certain belt speed and tension change P, two pulley speed difference is measured at the same time, can calculate the sliding rate is 8, this can be concluded that sliding curve & ndash;
The curve of a show and P.
from the data provided by the packaging machinery factory, from O to P on the curve.
Points, 8 with P basically linear relationship, reflects the belt's elastic slide.
When P more than P.
When the belt besides elastic sliding, still contain skid factors, sliding part will continue to increase with the increase of load, until the belt completely skid.
belt mass loss in transmission, it includes: the losses caused by air resistance, bending and elongation deformation belt of the loss, bearing friction loss and the belt of the slip loss.
After two losses of these losses is often highly actie.
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