Whether
you’re an OEM or machinery user, understanding and capitalizing on the benefits anti-vibration rubber mounts brings
is crucial . Ans hence arises the question of How to Choose the Right
Anti-Vibration Rubber Mounting.
Vibrations
can cause:
Damage to machine and its
Vibration sensitive controllers and panels
Loosening of screws ,gears, bearings , bolts etc. -escalating repair and
maintenance costs
Loss of production – poor outputs , damaged component Finish, Accuracy and Part
Tolerance
Transmitted noise, shock and vibrations, which can travel throughout a building
Damage to floors and structural units
Malfunctions , inaccuracies and disturbed alignment / calibrations of sensitive
and precision equipments
Operator discomfort , unsafe workplace environment causing worker fatigue
Shortened lifespan of machine
Anti-vibration
rubber mounts offer a cost-effective means to mitigate the adverse impacts of
vibration on your equipment/machinery and surroundings. Natural Rubber or
Neoprene elastomers or Dynemech customized elastomeric compounds handle
most vibration isolation problems.
In this
blog, we will explore the process of selecting the appropriate anti-vibration
rubber mounts for your machinery. As a prominent manufacturer of anti-vibration
products, we possess extensive experience in assisting our clients in
identifying the optimal solutions for their requirements. Let’s begin!
Determine the Equipment’s Weight and load distribution
The
first step in choosing the right anti-vibration rubber mounting is to determine
the weight of the equipment that needs to be isolated. The weight of the
equipment will determine the size , type and number of rubber mounting that
will be needed. Identify the total weight (kg) of the equipment/machinery and
the number of mountings that’ll be required. The higher the total weight, the
larger the mountings or, the higher the number of mountings needed to reduce
the machine vibrations.
Determine the weight allocation for each mounting.
We need
to keep in mind that the machinery’s weight might not be uniformly distributed.
And total machinery weight needs to consider the total weight of working
components, tools and dies together. For example, if the machinery weighs 800
kg, you would need anti vibration mounts with a load-bearing capacity of 200 kg
each when purchasing four mounts to evenly distribute the weight. Ensure an
even load distribution by checking the center of gravity, as different
locations may require mounts with varying load capacities.
Load
per mounting (kgs) = total load (kgs) ÷ number of mountings
Pressure
per mounting (kgs/sq cm) = Load per mount (kgs) ÷ mount/foot area
(square cm)
Determine the Equipment’s Vibration Profile
The
next step is to determine the vibration profile of the equipment – identify the
frequency (Hertz, Hz) , amplitude , RPM (revolutions per minute).
Determine the normal operational speed of the machinery or RPM (revolutions per
minute), referred to as the forcing frequency and also the lowest operating
speed (normally at idle), which determines the amounts of vibration emitted by
the equipment/ machinery
The forces and moments generated by this RPM will decide the choice of anti
vibration mountings needed to mitigate vibrations.
When
the vibration frequency is not known, calculations of the disturbing frequency
(Hz) are based on the operating speed (RPM).
Disturbing
frequency (Hz) = operating speed (RPM) ÷ 60
Determine
the natural frequency (Hz) that the system needs for 80% isolation.
Required
Natural frequency (Hz) = Disturbing frequency (Hz) ÷ 2.45
Determine the Operating or the Application
Environment
Take
into account the operating conditions and where the equipment is to be mounted-
outside or inside buildings, rooftops, ceiling mounted, floor mounted or in any
other positioning.
Exposure to temperature, humidity, and industrial chemicals , cleaning liquids,
or harsh elements can influence the effectiveness of the chosen anti-vibration
rubber mounting.
Ensure
to select a rubber mounting designed to perform well in the specific operating
environment of your equipment.The variant of rubber selected is based on the
environment conditions. Our stainless steel variants offer rust free
outdoors mounting options and spring isolators offer options to mount
in varied positions offering effective vibration control in which ever way the
machinery is supported or installed.
Dynemech
also offers solutions in various mounting configurations- like bolted, free
standing, bolt through, tapped hole, threaded studs or any other mounting
applications. Clearance requirements between equipment and building
foundation are also to be considered.
Consider the Type of Mounting
There
are several types of anti-vibration rubber mountings to choose from, including
but not limited to vibration insulation plates , wedge mounts, Screw support
mounts, stud mounts and many more. The type of mounting that you choose
will depend on the equipment, the vibration profile and damping requirements.
There’s
an inverse relationship between vibration dampening and impact load resistance
based on the natural frequency of the anti vibration rubber mountings. A lower
natural frequency provides higher vibration dampening but lower impact load
resistance, and vice versa .
Moreover,
shape, size and material of vibration isolators differ offering customers a
wide range to choose from.
Determining
whether vibrational frequencies are traveling to the machinery or if vibrations
generated in the equipment are to be dampened affect the mounting
selection. Vibration isolators prevent the transmission of vibrations ,
wheres Vibration dampeners, also known as vibration dampers, work to minimize
the transmission of vibrational energy affect the selection of anti vibration
mountings.
Find the desired static deflection
Static
deflection = incremental distance the isolator spring is compressed under
equipment weight. Isolator’s static deflection & supporting load achieve
the appropriate system natural frequency. The greater the static deflection
achieved without compressing to solid, the more vibration isolation the anti
vibration mounting must achieve.
Required
Static Deflection = (5/Desired Natural Frequency)^2
δ = (5/f)^2
Static Deflection – (Measured in cm , δ) –
Static deflection is the extension or compression of the constraint.
Frequency –
(Measured in Hertz, Hz)
Consider the Maintenance Requirements
Finally,
you’ll want to consider the maintenance requirements of the anti-vibration
rubber mounting. Some mountings require more maintenance
than others, so you’ll want to choose one that fits your needs. For example,
some mountings may require periodic tightening or lubrication, while others may
be maintenance-free.
Conclusion
Choosing
the right anti-vibration rubber mounting is critical to ensuring the longevity
,stability and productivity efficiency of any manufacturing equipment. By
considering the load distribution , vibration profile in terms of desired
natural frequency and static deflection required , application environment,
type of mounting, mounting and maintenance requirements, you can find the
best solution for your needs. If you need help choosing the Right
Anti-Vibration Rubber Mounting, our team of experts is here
to help. Contact us today to learn more about our products and services.
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us:-
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+91-9911145131
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