10
Installation and Maintenance Manual, Compact CBP
2.2 Sound from a complete installation
Hydraulic motor
The hydraulic motor is a known noise level.
(Tables of sound data - see subsection 4.9 in
the Engineering Manual).
Driven unit
The driven unit is an unknown sound source
(for us) but can through certain information
probably be obtained from the supplier. When
securing the torque arm of a hydraulic motor to
the foundation or casing of a driven machine,
it is highly important to study the construction
of the foundation or casing. This may well be
the most important factor to consider, since
many structures may give rise to resonance,
resulting in severe noise problems.
Remarks:
Background noise
The background noise can not normally be
influenced but is usually known or easy to
measure.
Pump unit
The pump unit is a known noise level.
Pipe noise
The pipe noise is probably the source of the
majority of mistakes in installations: all pipe
clamps should be of vibration insulating type
secured to concrete ceiling, wall or floor.
Securing to non-rigid metal structures or
structures is likely to give resonance and
should be avoided.
Background noise
Pump
motor
Pipe
noise
Hydraulic
motor
Noise from
driven unit
Foundation and construction noise
Technical data
