Dynamic forces of mechanical and hydraulic nature invariably
are a major cause of unwanted vibrations
in pumping machinery.
are a major cause of unwanted vibrations
in pumping machinery.
Over the years , AV mounts for Pumps have become more of a
necessity for several reasons
necessity for several reasons
1. Lightweight construction of building make if more susceptible to vibrate and anti
vibration mountings below the foundation bolts become necessary.
vibration mountings below the foundation bolts become necessary.
2. Space Constraints and valuable floor space lead to
installation of HVAC equipment like pumps in upper floors or nearby the main
living space, making vibration transmission a real annoyance.
installation of HVAC equipment like pumps in upper floors or nearby the main
living space, making vibration transmission a real annoyance.
3. The relationship between workplace comfort and productive
efficiency can never be overemphasized and hence, vibration control a
necessity.
efficiency can never be overemphasized and hence, vibration control a
necessity.
4. Vibration sensitive quality control , testing and
production machinery are often housed together to achieve manufacturing ease,
yet making them susceptible to vibration transmission and inaccurate results.
production machinery are often housed together to achieve manufacturing ease,
yet making them susceptible to vibration transmission and inaccurate results.
Higher vibration transmission are known to cause :
1. Structural and building vibrations
2. Reduced pump performance
3. Impaired service life of the equipment
4. Distortion to foundation, pipe anchors
5. Seal failures , breakage of drive-shafts, bearings etc.
Of the multitude of mechanical, hydraulic or miscellaneous
parameters or causes of vibration identified w.r.t. to inherent pump
functioning elsewhere
(1) , the most relevant to us seem to be pump machine setup (due to
multiplicity of mounting bases) and the phenomenon of resonance.
parameters or causes of vibration identified w.r.t. to inherent pump
functioning elsewhere
(1) , the most relevant to us seem to be pump machine setup (due to
multiplicity of mounting bases) and the phenomenon of resonance.
For the proper functioning and
safety of the pump and ancillary components like motors -gear-driver-etc., it
is important components have to be mounted on the same level to avoid alignment
problems. Varied AVmounts or anti-vibration mountings supplied by ENB can help
achieve the same. Also, isolation at equipment connects-piping, conduit ,
ductworks, etc. and isolation at
building support points need to be considered.
safety of the pump and ancillary components like motors -gear-driver-etc., it
is important components have to be mounted on the same level to avoid alignment
problems. Varied AVmounts or anti-vibration mountings supplied by ENB can help
achieve the same. Also, isolation at equipment connects-piping, conduit ,
ductworks, etc. and isolation at
building support points need to be considered.
Resonance- if the natural frequency
of the machine or system is nearly equal to the frequency of the excitation ,
the resulting vibration can cause phenomenal damage. Hence, no natural
frequency of the pump-engine-gear train and the supporting structure can lie in
the typical operating speed range. Installing the pump-motor-supporting
structure on ENB Vibration Isolation Pads help to reduce the natural frequency
of the combine.
of the machine or system is nearly equal to the frequency of the excitation ,
the resulting vibration can cause phenomenal damage. Hence, no natural
frequency of the pump-engine-gear train and the supporting structure can lie in
the typical operating speed range. Installing the pump-motor-supporting
structure on ENB Vibration Isolation Pads help to reduce the natural frequency
of the combine.
Even when the equipment is
mounted directly on a rigid foundation, excessive structure vibration caused by
absorption of vibration energy from the machinery can be contained by :
mounted directly on a rigid foundation, excessive structure vibration caused by
absorption of vibration energy from the machinery can be contained by :
1. Modifying the rigidly mounted
machine-foundation setup to increase or decrease the resonance frequencies so
that it doesn't match the machine's operating frequencies.
machine-foundation setup to increase or decrease the resonance frequencies so
that it doesn't match the machine's operating frequencies.
2. Isolate the equipment from the
structure through ENB vibration isolators .
structure through ENB vibration isolators .
Attention to simple, cost effective highly efficient vibration absorbing mount that
can dissipate, absorb and insulate against vibrations during design and
installation of pumping equipments saves costly retrofitting of vibration
isolators and machinery downtime later on.
can dissipate, absorb and insulate against vibrations during design and
installation of pumping equipments saves costly retrofitting of vibration
isolators and machinery downtime later on.
Our natural rubber av mounts provide static deflection of
less than 5mm and hence are effective (isolation efficiencies greater than 90%)
for equipment with driving frequencies greater than 25 Hz.
less than 5mm and hence are effective (isolation efficiencies greater than 90%)
for equipment with driving frequencies greater than 25 Hz.
Inherent damping of the elastomeric, provide good vibration
control in most industrial applications.
control in most industrial applications.
Salient features of
ENB anti-vibration av mounts:
1) Highest vibration absorption and lowest set characteristics
due to
high natural rubber content.
2) ENB is a leader in rubber to metal adhesion and our processes
are
geared to enhance this adhesion for higher mount life under continuous
vibration.
3) The fail-safe that we are employing in our EGA Series
mounts are
tested for Torque movement of top cup due to rotational motion. The EGA-105
(M16) is torque tested till 140 Nm.
4) The final finishing, quality and performance of the
mounts are as
per European standards.
5) Dome cover and zinc plated metal provides protecting
against oil , fuel contamination and corrosion resistance.
1. Ravindra Birajdar , Rajashri
Patil & Kedar Khanzode
"VIBRATION AND NOISE IN CENTRIFUGAL PUMPS - SOURCES AND DIAGNOSIS
METHODS" presented at 3 rd
International Conference on Integrity, Reliability and Failure, Porto/Portugal,
20-24 July 2009 (link:
http://paginas.fe.up.pt/clme/IRF2009/PROCEEDINGS/PAPERS/P0437.pdf)
ENB anti-vibration av mounts:
1) Highest vibration absorption and lowest set characteristics
due to
high natural rubber content.
2) ENB is a leader in rubber to metal adhesion and our processes
are
geared to enhance this adhesion for higher mount life under continuous
vibration.
3) The fail-safe that we are employing in our EGA Series
mounts are
tested for Torque movement of top cup due to rotational motion. The EGA-105
(M16) is torque tested till 140 Nm.
4) The final finishing, quality and performance of the
mounts are as
per European standards.
5) Dome cover and zinc plated metal provides protecting
against oil , fuel contamination and corrosion resistance.
1. Ravindra Birajdar , Rajashri
Patil & Kedar Khanzode
"VIBRATION AND NOISE IN CENTRIFUGAL PUMPS - SOURCES AND DIAGNOSIS
METHODS" presented at 3 rd
International Conference on Integrity, Reliability and Failure, Porto/Portugal,
20-24 July 2009 (link:
http://paginas.fe.up.pt/clme/IRF2009/PROCEEDINGS/PAPERS/P0437.pdf)
2. Garr M. Jones, PE, DEE, Robert L. Sanks, PhD, PE, "Pumping
Station Design: Revised 3rd Edition", Butterworth-Heinemann, 2011
Station Design: Revised 3rd Edition", Butterworth-Heinemann, 2011
Please feel free to
contact us on:
contact us on:
E&B Rubber Metal Products Pvt. Ltd.
101, Priya Aptts,
Sector-14, Rohini
Delhi – 110085,
INDIA
Mobile: +91-9810760131, 9810554131
Phone: +91-11-27347982
101, Priya Aptts,
Sector-14, Rohini
Delhi – 110085,
INDIA
Mobile: +91-9810760131, 9810554131
Phone: +91-11-27347982
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