Load Introduction - HBM C2A/ Série Notice De Montage

Load introduction

4 Load introduction
When applied in weighing equipment, load cells are subjected to unwanted
side forces and moments. These may arise from deformation of the loaded
weighing machine structure or through thermals strains. To keep the effects on
the measurement resulting from these forces and moments as low as possible,
HBM supplies pendulum supports and rubber‐metal bearings as load introduc­
tion components. Both types of load introduction components enable a design
with a degree of horizontal movement with respect to the load cells.
A deflection causes a reactive force which attempts to restore the weighing
machine to its original position. With the pendle supports this restoring force is
proportional to the deflection and the current loading and with elastomer bear­
ings it is just proportional to the deflection. This means that a different charac­
teristic is obtained, particularly under partial loading conditions.
The rubber‐metal bearing also possesses higher damping in the horizontal and
vertical directions. In both cases no stay rods are needed. It is sufficient to limit
the horizontal movement of the weighing machine structure using mechanical
stops (take note of s in chapter 7, on page 15).
max
8 C2A/...
A01572_03_Y00_01 HBM: public