ENCLOSED SPRING MOUNT

Where a preference exists for the enclosed captive spring style of mount, we have responded by adding a new range to complement the existing Vibrostop open spring range.

For ultimate isolation performance this range includes the DM and DH styles which provide spring compression up to 50mm. To eliminate spring buckling, duplex springs sets are arranged in series separated by a steel plate. Un-necessary pre-travel is eliminated and stability is assured in this range as the mount is assembled in a pre-compressed condition. This range also features level adjustment such that the installation can be maintained perfectly level even if all mounts are not subject to exactly the same loading. 99% isolation can thus be achieved at frequencies as low as 14Hz (840rpm)

Typical applications: This style of mount is used frequently in applications where high levels of vibration isolation are necessary such as in air handling systems, motor/generator sets and motor/pump combinations within, or on top of occupied buildings. A key application would include hospital theatre and metrology laboratory air handling units and motor driven fan units where noise and vibration must be precluded.

 

Dimensions and Data

Model types include the following:

 

WSA               Single spring enclosed isolator                    10 to 40Kg

WSA-M          Multiple Spring Isolator                                    40 to 660Kg

WSA-DM       Multiple Spring Isolator-high deflection        40 to 660Kg

WSA-H          Multiple Spring Isolator, heavy duty                500 to 1650Kg

WSA-DH       As above with, high deflection                        500 to 1650Kg

 Notes:

• Deflection under load prior to levelling is given by the formula: (A/B)-C where

A = Load in Kg

B = Spring rate in Kg/mm

C = Pre compression in mm

 Example: If a load of 950Kg is placed on the WSA-1000DH, the deflection would be 22.5mm from the unloaded height.  The actual compression of the spring mount for the purposes of vibration isolation calculations would be 47.5mm

 From the minimum loaded height the mounts can be adjusted to the unloaded height less 5mm.

• Compressing beyond the minimum height (i.e. exceeding the spring rating) will reduce the spring life and may result in reduced isolation efficiency or in extreme cases premature failure.