Cemb Hofmann UK

Cemb Hofmann UK
UK Specialist In Balancing Machine Sales & Contract Balancing

Monday, 16 September 2013

Allocation of Permissible Residual Unbalance To Each Correction Plane According to ISO 1940/1


ISO 1940/1 standards calculate the total acceptable unbalance of a rotor (static unbalance) referred to the plane (rotor section) containing the centre of mass.

The acceptable residual unbalance on the two balancing planes (dynamic unbalance) is calculated taking care of the position of the centre of mass with regard to the position of the correction planes.


Balancing Diagram


 

Note:
 
If the calculated value for U1 , U2 is lower than 0.3 Ut  the value 0.3 Ut  is used ; if the calculated value is bigger than 0.7 Ut  the value  to be used is 0.7 Ut,
 
Balancing Diagram from Cemb Hofmann UK

 




A frequent application of the above mentioned rules happens with pump and fun impellers (over hang mounted.)






For more information about balancing visit Cemb Hofmann UK today or call our expert team on 0161 872 3123.