Ring load and Ring Life

Ring load

During the spinning process there is always a high load on the ring running track. The travellers centrifugal force (Fc) depends on the traveller weight (m), the ring radius (r) and the traveller linear speed (v). The centrifugal force is calculated with the following formula:

   

This leads to very high values, compared to the relatively small weight of a traveller.

Th e centrifugal force can reach a load which is up to 8'000 times the traveller weight.

These  high loads create heat and leads stress to the ring surface. In order to prevent premature wear on the running track  when working under extremely high loads or heavy conditions, it is recommended to use a ring treatment with very high wear resistance.
 

Load on ring and ring traveller

 The lifetime of rings and travellers depends on two main parameters:

of the raw material processed (lubrication potential) and of the mechanical and

thermal load on ring and traveller (speed, ring diameter, traveller weight).

l The centrifugal force increases in square in proportion to the traveller speed

l The traveller temperature in the contact area of traveller-ring increases in cube

    in proportion to traveller speed (1).

 

 

High temperature in the contact area of ring and traveller increases the danger of ring damages (tribo-chemical abrasion, surface destruction, softening of material).

The lifetime of ring behaves opposite in proportion to thermal load.

                            

Ring life

The life of a spinning rings depends on the following factors:

·         Type of fibre processed

·         Yarn count (traveller weight)              

·         Spindle speed

·         Traveller running time                                      

·         General conditions (centering of rings etc.)