Post on 07-Feb-2023
Vibration Solutions for Building Services Equipment
Increased precision in building
services equipment
Quick and cost-effective
implementation
Eficient solutions for reducing noise and vibrations
At Getzner, solutions to minimise vibrations and
structure-borne noise have been at the heart of
creation for almost 45 years – for building servic-
es equipment as well as for civil engineering and
industry.
Modern buildings are becoming ever more com-
plex in terms of construction and equipment.
Even lightweight constructions – mainly concrete
and steel structures with extensive glass façades
– are susceptible to vibrations. They amplify and
transmit structure-borne noise from the facilities
installed inside. When these devices are operation-
al, they emit vibrations that are transferred as
structure-borne noise to other parts of the building
via solid objects such as loors and walls. Humans perceive this as vibration or noise. Vibration has an
adverse impact on quality of work and life in places
where lots of people congregate.
Calling in vibration isolation specialists during the
building planning phase helps to keep costs low, as
much of the additional expenditure required to
make subsequent improvements is no longer neces-
sary. The result is a building that offers more tran-
quillity, enhanced functionality and improved well-
being.
>> Vibrations can have a negative impact
on people's health and wellbeing.
Getzner offers
— Solutions offering the best possible
cost-beneit ratio; not least due to the hundreds of thousands of successful-
ly mounted air conditioning and ven-
tilation systems
— Quick implementation owing to ex-
pert calculation and manufacturing
— Eficient, established and approved products to meet various require-
ments
— A holistic approach to relevant frame-
work conditions – starting from the
planning phase
— Less inancial and technical effort thanks to professional consultancy
Bearing of air conditioning systems in the
Mercedes Museum in Stuttgart
3
4
Vibration Sources in Building Services Engineering
2
Chillers
Compressors in chillers generate
structure-borne noise that can be
transferred to the building. ¬ Page 12
Cooling towers (recoolers)
Cooling towers to be installed on the
roof of a building distribute structure-
borne noise during operation. ¬ Page 14
Fans
The fan transports and compresses a
gaseous medium by means of an inte-
grated rotating impeller. Even the
slightest imbalance can generate
structure-borne noise. ¬ Page 13
Pumps
The operation of the pumps also
causes structure-borne noise.
¬ Page 15
Pipes
Pipes leading from or to energy sourc-
es (AC, HVAC etc.) generate structure-borne noise and must be considered
as a whole when decoupling the sys-
tem from structure-borne noise.
¬ Page 16
Lift systems
During operation, the starting, stop-
ping and general movement of the
cabin generates vibrations that are
transmitted to the structure of the
building and perceived as structure-
borne noise. ¬ Page 17
Air conditioning (AC)
systems/air handling units
The main reason for the occurrence
of structure-borne noise is usually
the motor-fan unit. For more information,
see¬ page 8
Combined heat and power plants
(CHP plants)
Combined heat and power plants
generate high levels of structure-
borne noise due to their large,
moved masses and accelerations.
¬ Page 10
Heat pumps
Heat pumps generate high levels of structure-borne noise due to their
compressors and moved masses.
¬ Page 11
Getzner reduces vibrations right at the point of origin.
Developers, architects and other con-
struction specialists have to confront
the particular challenges presented by
sound control. To comply with the provi-
sions of the building and construction
industry, it is necessary to plan the build-
ing services equipment (BSE) across the various trades. This is the only way to
reduce airborne and structure-borne
noise as effectively as possible. Solutions
from Getzner reduce vibrations to a level
that is barely perceptible, with a positive
effect on quality of work and life.
1
8
9
2
3
5
4
6
7
5
Elastic bearing of an air conditioning
system
Elastic cogeneration plant bearing
3
2
6
8
5
9
7
7
4
1
5
6
Products for Maximum Effectiveness
3
Vibration-isolating products (overview)
Isotop® SD, MSN steel
spring isolators
Isotop® MSN/Z, SD/Z,
MSN/Z-LC
tension elements
Isotop® SE-DE sand-
wich elements,
special versions
Isotop® SD-BL, MSN-BL
compact block elements
Isotop® DZE pressure-
tension elements
Isotop® MSN-DAMP
vibration damper
Isotop® DSD steel
spring isolators with
damping core
Isotop® DZE-BL
pressure-tension
elements
Full-surface, strip and discrete
bearings made of Sylomer®,
Sylodyn®, special types
Foundation bearings
made of Sylomer®,
Sylodyn®, special types
Isotop® DSD-BL compact
block elements with
damping core
Isotop® SE
sandwich elements
Product beneits:
— Maintenance-free
— Very low settling behaviour and long
service life
— Long life cycles
— Easily adapted to the local installa-
tion situation (Isotop® is a modular
system; Sylomer® and Sylodyn® can
be made to measure and are colour-
coded)— Sylomer® and Sylodyn® are highly
effective at a low overall height and
low delection (protecting electrical and mechanical connections)
— All Isotop® products have screw
connections and are of a robust,
compact design
Maintenance-free bearing with
Isotop® DSD
Strip bearing with Sylomer®
Thanks to its wide range of products,
Getzner Werkstoffe is able to tailor
bearings perfectly to the customer
requirements.
Isotop® products are mainly used for
low-frequency bearing. They can be
tailored in line with the disturbing fre-
quency as required, up to a frequency
of 3.0 Hz.
— Mainly used for natural frequencies
below 8 Hz— Springs can be used for point loads
from 2 kg up to 5.5 t per element
Sylomer® and Sylodyn® are used mainly
for full surface bearings with natural
frequencies above approximately 7 Hz (disturbing frequencies from 25 Hz upwards).
Ideally, Getzner HRB bearings are used for very high loads in the smallest spac-
es.
— Mainly used for natural frequencies
above 7 Hz— Load ranges from 1 t/m2 to 600 t/m2
— Available in thicknesses from 2 to
50 mm
Product selection
38 Hz
30 Hz
23 Hz
16 Hz
9 Hz
Product
Device disturbing frequency
Min. verticalnatural frequency
Isotop® SD
9 Hz
3 Hz
Isotop® DSD
16 Hz
5 Hz
Isotop® SESylomer®/Sylodyn®
23 Hz
7 Hz
Isotop® DZE, MSN-DAMP, SE-DE, Sylomer®/Sylodyn®
30 Hz
9 Hz
Sylomer®/Sylodyn®
38 Hz
14 Hz
Device disturbing frequency
Eficiency of insulation > 90%
Lower tuning frequencies
can be achieved by higher
thicknesses and geomet-
ries.
7
Solutions4
Bearing of an air conditioning system on
steel springs with an integrated damping
core (Isotop® DSD)
Individually tailored products along-
side detailed installation plans and
itting instructions result in eficient solutions for reducing noise and
vibrations in buildings.
Framework conditions for
professional solutions
— Deinition of all exciting forces— Consideration of the effects of elastic
bearing on the exciter and the object
to be protected
— Universal procedure
— Compliance with legal requirements
for structure-borne noise protection
4.1 Air conditioning systems
Modern air conditioning (AC) systems are usually installed in service rooms in
the basement or on the roof. Depending
on the surface conditions and design of
the substructure, extensive structure-
borne noise protection measures are
required.
Elastic bearings made from Sylomer®
are used as standard measures and
Isotop® SE or SE-DE elements for high
point loads. For critical applications
(hospitals, concert halls, theatres etc.), the systems are mounted on spring
assemblies.
Individuality creates eficiency
1 Sylomer® linear support for a
roof-mounted AC system
2 AC system next to office space
decoupled with Isotop® SE
1 2
Application example
Task:
Installation of an air conditioning sys-
tem decoupled from structure-borne
noise next to an ofice space— Natural frequency approx. 15 Hz— Low installation height
Solution: Sylomer® linear supports
underneath the base frame
Result: Natural frequency of 14.8 Hz achieved, eficiency of insulation at 3,000 rpm (50 Hz) = 90 %
8
Bearing on Isotop® steel springs with
decoupled foot and pressure plates
Application example
Task: Roof installation of air-handling units decoupled from structure-borne noise
for protection of lecture halls and event
rooms
— Required natural frequency < 7 Hz
Solution: Isotop® DSD-BL 2 steel spring
block elements with damping core and
decoupled footplate and pressure plate
Special feature: Height-adjustable de-
sign for offsetting the roof pitch
Result: Natural frequency of 4.8 Hz achieved, eficiency of insulation at 3,000 rpm (50 Hz) = 99 %
1 21 AC system on steel construction
elastically decoupled with
Isotop® steel springs
2 Bearing of an air-handling unit
on Sylomer®
Isolation curve,
natural frequency 4.8 Hz
Isolation curve,
natural frequency 14.8 Hz
2 2.5 3.2 4 5 6.3 8 10 13 16 20 25[Hz]
20
10
0
-10 [
dB
]
-30
-20
20
10
0
-10
-20
5 6.3 8 10 12.5 16 20 25 30 35 40 50 [Hz]
[d
B]
-30
-40
-50
IsolationIsolation
9
Solutions4
Isotop® DSD bearing
4.2 Combined heat and power plants
(CHP plants)
Combined heat and power plants gener-
ate high levels of structure-borne noise
due to their large, moved masses and
accelerations. To prevent long-term
damage to the shell of the building and
avoid health hazards for persons, the
systems need to be elastically mounted.
Combined heat and power plants are
usually isolated using spring assemblies
with damper elements, or using Sylomer®/
Sylodyn® linear support or foundation
bearings.
Application example
Task:— Low natural frequency < 6 Hz— Decoupling element with damping
— High amplitudes
Solution: Isotop® DSD-BL 6 with
footplate
Result: Natural frequency of 5 Hz achieved, eficiency of insulation at 1,500 rpm (25 Hz) = 95 %
10
Isolation curve,
natural frequency 5.0 Hz
1 Isotop® DSD-BL bearings
2 Isotop® DZE bearings
3 Bearing on Sylodyn®4 Strip bearing on
Sylodyn®
1 2
43
20
10
0
-10
2 2.5 3.2 4 5 6.3 8 10 13 16 20 25[Hz]
[d
B]
-30
-20
Isolation
Reduction in secondary airborne noise
thanks to elastic decoupling of the
system
4.3 Heat pumps
Heat pumps generate high levels of
structure-borne noise due to their
compressors and moved masses. They
are extremely eficiently isolated using steel springs – with or without damp-
ers – or using Sylomer®.
Application example
Task: Vibration-suppressing bearing of
a compressor unit
— Low natural frequency < 5 Hz— Compact design
Solution: Isotop® SD with type Isotop®
FP/K footplate decoupled from
structure-borne noise
Result: Natural frequency of 4.8 Hz achieved, eficiency of insulation at 1,500 rpm (25 Hz) = 94 % 1
Isolation curve,
natural frequency 4.8 Hz
20
10
0
-10
2 2.5 3.2 4 5 6.3 8 10 13 16 20 25[Hz]
[d
B]
-30
-20
1 Bearing of a heat pump using
Isotop® steel springs
2 Discrete decoupling of a heat
pump using Sylomer®
1 2
Isolation
11
Bearing of a chiller using
Isotop® SE-DE
12
1 Bearing of a chiller
using Isotop® DSD-BL
2 Bearing of a chiller
using Sylomer®3 Bearing of a chiller
using Isotop® SD-BL 2
1 2
3
4.4 Chillers
Chillers are usually installed on the
roof. As this promotes structure-borne
noise, the systems are isolated using
Sylomer® or Isotop®.
Application example
Task: Roof installation of a refrigerating ma-
chine decoupled from structure-borne
noise on an on-site steel structure
— Natural frequency < 5 Hz
Solution: Isotop® SD-BL 2 steel spring
block elements with footplate and pres-
sure plate decoupled from structure-
borne noise
Result: Natural frequency of 3.5 Hz achieved, eficiency of insulation at 1,500 rpm (25 Hz) = 90 %
Solutions4
Isolation curve,
natural frequency 3.5 Hz
2.0 2.5 3.2 4 5 6.3 8 10 13 16 20 25 [Hz]
[d
B]
20
10
0
-10
-20
-30
Isolation
Bearing of fans using Isotop® SD
steel springs
4.5 Fans
Fans have moved masses with large
acceleration values. Depending on the
imbalance of the motor and impeller, a
reduction in structure-borne noise is
required. Due to various operating
points when starting and stopping, fans
are isolated using springs or spring
assemblies (block elements).
Application example
Task: Elastic bearing of a tunnel fan
— Low natural frequency < 4 Hz— Minimum installation height
Solution: Isotop® SD with footplate
Result: Natural frequency of 3.5 Hz achieved, eficiency of insulation at 1,000 rpm (16.7 Hz) = 95 %
Isolation curve,
natural frequency 3.5 Hz
2 2.5 3.2 4 5 6.3 8 10 13 16 20 25[Hz]
20
10
0
-10 [
dB
]
-30
-20
Reduction of structure-borne
noise through bearing using
Isotop® SD steel springs
Isolation
13
Elastic decoupling of a cooling tower
using Isotop® DZE elements
14
4.6 Cooling towers (recoolers)
Cooling towers installed on a roof gener-
ate high levels of structure-borne noise
during operation. Depending on the re-
quirements regarding the eficiency of insulation, the systems are isolated us-
ing Sylomer® or Isotop®.
Application example
Task: Roof-mounted recooler— Natural frequency < 15 Hz— Linear support
Solution: Elastic bearing made from
Sylomer®
Result: Natural frequency of 13.4 Hz achieved, eficiency of insulation at 3,000 rpm (50 Hz) > 90 %
1 Recooler equipped with
Sylomer® bearings as
standard
2 Structurally-strong bearing
of a cooling tower using
Isotop® DZE
1
2
Solutions4
Isolation curve,
natural frequency 13.4 Hz
5 6.3 8 10 12.5 16 20 25 31.5 40 [Hz]
20
10
0
-10
-20 [
dB
]
-30
-40
-50
Isolation
Bearing of pumps using Isotop® steel
springs (block elements)
Decoupling of a pump
using Sylomer® and Sylodyn®
4.7 Pumps
Pumps usually convey liquid media with
different viscosities. Depending on the
medium, pressure and conveying dis-
tance, extensive structure-borne noise
insulation must be considered. Pumps
are extremely eficiently isolated using structurally-strong DZE elements, or,
where pump foundations are present,
with Sylomer®/Sylodyn®, sandwichele-
ments or block elements.
Application example:Task: — Low natural frequency < 8 Hz— Easy installation
Solution: Isotop® DZE
Result: Natural frequency of 7.5 Hz achieved, eficiency of insulation at 1,500 rpm (25 Hz) = 90 %
1 Bearing of a pump
foundation using Sylodyn®2 Bearing of pumps with
Isotop® DZE elements
1
2.0 2.5 3.2 4 5 6.3 8 10 13 16 20 25 [Hz]
20
10
0
-10
-20
[d
B]
-30
Isolation curve,
natural frequency 7.5 Hz
2
Isolation
15
16
4.8. Pipes and peripheral devices
Pipes leading from or to energy sources
(AC, HVAC etc.) generate structure-borne noise and must be considered as
a whole when decoupling the system
from structure-borne noise.
Application example
Task: Research institute, suspended pipes, guidelines from
constructionphysicist
— Natural frequency ≤ 6 Hz
Solution: Isotop® / Sylomer®
Result: natural frequency of 4 Hz achieved, eficiency of insulation at 1,500 rpm (25 Hz) = 97.4 %
Solutions4
Bearing of an exhaust heat
exchanger using Isotop® DSD-BL
steel spring dampers
Pipes decoupled using Isotop®
SD/Z
Isolation curve,
natural frequency 4 Hz
2.0 2.5 3.2 4 5 6.3 8 10 13 16 20 25 [Hz]
20
10
0
-10
-20
[d
B]
-30
Isolation
4.9 Lift systemsLifts are used to transport individuals
or loads between two or more levels in
a moving cabin. During operation, the
starting, stopping and general move-
ment of the cabin generates vibrations
that are transmitted to the structure of
the building and perceived as structure-
borne noise.
It is highly recommended that appropri-
ate decoupling measures are consid-
ered right from the start, during the
planning and design phase of the lift
system.
The bearing of the drive and cables in
particular using Sylomer® and double
elastic Isotop® SE-DE elements can
achieve excellent decoupling results.
Solutions with Isotop® SE-DE meet the
requirements of bearing class EL3 in
accordance with VDI 2566. Most solu-
tions are implemented with natural
frequencies of between 10 and 15 Hz.
1
3
2
4
1 Double elastic bearing using
Isotop® SE-DE, overhead
cable guide
2 Easy elastic bearing using
Isotop® SE, drive above shaft
3+4 Decoupling of the drive
using pre-stressed bearings
made from Sylomer®
Double elastic bearing using Isotop® SE-DE,
overhead drive
17
Service5
Getzner develops customised solu-
tions to meet stringent demands –
for all industry sectors. The difference
between Getzner and other suppliers:
— More customer focus
— More experience
— Better service
Holistic solution development
Getzner is on hand to assist in projects
from the planning stage right through
to implementation. Production at its
own facilities allows the company to
ensure that projects are completed
promptly and on time. Our team of ex-
perts is also lexible and able to react quickly to change requests.
Smart from the start
The bearing of all equipment is planned
according to customer requirements
and constructional considerations.
Setting up devices made easy
Getzner ascertains suitable measures
for structure-borne noise insulation
— according to position and with an
appropriate centre of gravity. What
customers receive is a precise calcula-
tion, indicating the degree of isolation,
damping eficiency and natural frequency for the bearing of their
system. A detailed CAD plan simpliies the installation of the products, as
good as eliminating the possibility of
inappropriate mounting. The results
show effective vibration isolation
as intended
The following data is required in
order to deal with enquiries
— Device or machine version (applica-
tion description/drawing, etc.)— Dimensions and weight of the
machine or device
— Position of the support points and
centre of gravity
— Required bearing type (full-surface, discrete or strip)
— Minimum excitation frequency
[Hz] (if known)— Static and dynamic device loads
Everything from a single source
— Consultation
— Optimisation
— Calculation
— Vibration measurement
— Vibration isolation
forecast
— Installation plans
— Installation supervision
— Prototype production
— Pilot series production
— Series production
— Quality label
1
18
References6
1 Oslo Opera House
2 Steigs (Mels) power plant
>> Solutions from Getzner are being used
successfully all over the world.
Porsche Museum Stuttgart
Renowned manufacturers in the pro-
cessing industry, engineering and
planning ofices as well as technical building service companies across the
globe trust in the experience and qual-
ity of Getzner.
As a recognised system partner, our
company is involved from the mo-
ment concepts are developed and
throughout the design and planning
phase.
Extract of references from over 40 years of experience in providing vibration protection solutions for building
services equipment.
— Mercedes Museum Stuttgart (bearing of air conditioning
systems)— Messe Stuttgart (bearing of air conditioning systems)— Isfahan Metro (bearing of smoke extraction fans)— AMD Wafer Fab Dresden (bearing of process chillers and
air conditioning systems in clean room)— Brüder Grimm Museum (bearing of AC systems)— Porsche Museum Stuttgart (bearing of AC systems)— Oslo Opera House (bearing of AC systems)— Airrail Center – Frankfurt Airport
(bearing of air conditioning systems)— Steigs (Mels) power plant (foundation bearing)
2
19
Getzner Werkstoffe GmbH
Herrenau 5
6706 Bürs
Austria
T +43-5552-201-0
F +43-5552-201-1899
info.buers@getzner.com
Getzner Werkstoffe GmbH
Am Borsigturm 11
13507 Berlin
Germany
T +49-30-405034-00
F +49-30-405034-35
info.berlin@getzner.com
Getzner Werkstoffe GmbH
Nördliche Münchner Str. 27a
82031 Grünwald
Germany
T +49-89-693500-0
F +49-89-693500-11
info.munich@getzner.com
Getzner Spring Solutions GmbH
Gottlob-Grotz-Str. 1
74321 Bietigheim-Bissingen
Germany
T +49-7142-91753-0
F +49-7142-91753-50
info.stuttgart@getzner.com
Getzner France S.A.S.
Bâtiment Quadrille
19 Rue Jacqueline Auriol
69008 Lyon
France
T +33-4 72 62 00 16
info.lyon@getzner.com
Getzner Werkstoffe GmbH
Middle East Regional Office
Abdul - Hameed Sharaf Str. 114
Rimawi Center - Shmeisani
P. O. Box 961 303
Amman 11196, Jordan
T +9626-560-7341
F +9626-569-7352
info.amman@getzner.com
Getzner India Pvt. Ltd.
1st Floor, Kaivalya
24 Tejas Society, Kothrud
Pune 411038, India
T +91-20-25385195
F +91-20-25385199
Nihon Getzner K.K.
6-8 Nihonbashi Odenma-cho
Chuo-ku, Tokyo
103-0011, Japan
T +81-3-6842-7072
F +81-3-6842-7062
info.tokyo@getzner.com
Beijing Getzner Trading Co.; Ltd.
Zhongyu Plaza, Office 1806
Gongti Beilu Jia No. 6
100027 Beijing, PR China
T +86-10-8523-6518
F +86-10-8523-6578
info.beijing@getzner.com
Getzner USA, Inc.
8720 Red Oak Boulevard, Suite 528
Charlotte, NC, 28217, USA
T +1-704-966-2132
info.charlotte@getzner.com
www.getzner.com
B B
SE
en
© C
opy
rig
ht
by G
etzn
er W
erks
toff
e G
mb
H |
04
-20
16