Vibration Solutions for Building Services Equipment

Transcription

1 Vibration Solutions for Building Services Equipment Eficient solutions for reducing noise and vibrations Quick and cost-effective implementation Increased precision in building services equipment

2 1 Values and Visions

3 Bearing of air conditioning systems in the Mercedes Museum in Stuttgart >> Vibrations can have a negative impact on people's health and wellbeing. At Getzner, solutions to minimise vibrations and structure-borne noise have been at the heart of creation for almost 45 years for building services equipment as well as for civil engineering and industry. Modern buildings are becoming ever more complex 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 operational, 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 necessary. The result is a building that offers more tranquillity, enhanced functionality and improved wellbeing. Getzner offers Solutions offering the best possible cost-beneit ratio; not least due to the hundreds of thousands of successfully mounted air conditioning and ventilation systems Quick implementation owing to expert calculation and manufacturing Eficient, established and approved products to meet various requirements A holistic approach to relevant framework conditions starting from the planning phase Less inancial and technical effort thanks to professional consultancy 3

4 2 Vibration Sources in Building Services Engineering Getzner reduces vibrations right at the point of origin. Developers, architects and other construction specialists have to confront the particular challenges presented by sound control. To comply with the provisions of the building and construction industry, it is necessary to plan the building 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 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 structureborne noise during operation. Page 14 Fans The fan transports and compresses a gaseous medium by means of an integrated rotating impeller. Even the slightest imbalance can generate structure-borne noise. Page 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 structureborne 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 Pumps The operation of the pumps also causes structure-borne noise. Page 15 Pipes Pipes leading from or to energy sources (AC, HVAC etc.) generate structureborne noise and must be considered as a whole when decoupling the system from structure-borne noise. Page 16 Lift systems During operation, the starting, stopping and general movement of the cabin generates vibrations that are transmitted to the structure of the building and perceived as structureborne noise. Page 17 4

5 Elastic bearing of an air conditioning system Elastic cogeneration plant bearing

6 3 Products for Maximum Effectiveness Vibration-isolating products (overview) Isotop SD, MSN steel spring isolators Isotop SD-BL, MSN-BL compact block elements Isotop DSD steel spring isolators with damping core Isotop DSD-BL compact block elements with damping core Isotop MSN/Z, SD/Z, MSN/Z-LC tension elements Isotop DZE pressuretension elements Isotop DZE-BL pressure-tension elements Isotop SE sandwich elements Isotop SE-DE sandwich elements, special versions Isotop MSN-DAMP vibration damper Full-surface, strip and discrete bearings made of Sylomer, Sylodyn, special types Foundation bearings made of Sylomer, Sylodyn, special types 6

7 Maintenance-free bearing with Isotop DSD Strip bearing with Sylomer Product selection 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 frequency 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 spaces. Mainly used for natural frequencies above 7 Hz Load ranges from 1 t/m 2 to 600 t/m 2 Available in thicknesses from 2 to 50 mm Product beneits: Maintenance-free Very low settling behaviour and long service life Long life cycles Easily adapted to the local installation situation (Isotop is a modular system; Sylomer and Sylodyn can be made to measure and are colourcoded) 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 Device disturbing frequency 38 Hz 30 Hz 23 Hz Eficiency of insulation > 90% 16 Hz 9 Hz Product Isotop SD Isotop DSD Isotop SE Sylomer /Sylodyn Isotop DZE, MSN- DAMP, SE-DE, Sylomer /Sylodyn Sylomer /Sylodyn Device disturbing frequency 9 Hz 16 Hz 23 Hz 30 Hz 38 Hz Min. vertical natural frequency 3 Hz 5 Hz 7 Hz 9 Hz 14 Hz 7

8 4 Solutions Bearing of an air conditioning system on steel springs with an integrated damping core (Isotop DSD) Individuality creates eficiency Individually tailored products alongside 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 structureborne 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. Application example Task: Installation of an air conditioning system 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% Sylomer linear support for a roof-mounted AC system 2 AC system next to office space decoupled with Isotop SE 8

9 Bearing on Isotop steel springs with decoupled foot and pressure plates Isolation curve, natural frequency 14.8 Hz [db] Isolation 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 Isolation curve, natural frequency 4.8 Hz [db] Isolation Solution: Isotop DSD-BL 2 steel spring block elements with damping core and decoupled footplate and pressure plate [Hz] Special feature: Height-adjustable design for offsetting the roof pitch Result: Natural frequency of 4.8 Hz achieved, eficiency of insulation at 3,000 rpm (50 Hz) = 99% [Hz] AC system on steel construction elastically decoupled with Isotop steel springs 2 Bearing of an air-handling unit on Sylomer 9

10 4 Solutions Isotop DSD bearing 4.2 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. 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% Isolation curve, natural frequency 5.0 Hz [db] Isolation [Hz] Isotop DSD-BL bearings 2 Isotop DZE bearings 3 Bearing on Sylodyn 4 Strip bearing on Sylodyn

11 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 dampers 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 [db] Isolation [Hz] Bearing of a heat pump using Isotop steel springs 2 Discrete decoupling of a heat pump using Sylomer 11

12 4 Solutions Bearing of a chiller using Isotop SE-DE 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 machine decoupled from structure-borne noise on an on-site steel structure Natural frequency < 5 Hz Isolation curve, natural frequency 3.5 Hz [db] Isolation Solution: Isotop SD-BL 2 steel spring block elements with footplate and pressure plate decoupled from structureborne noise Result: Natural frequency of 3.5 Hz achieved, eficiency of insulation at 1,500 rpm (25 Hz) = 90% [Hz] 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 12

13 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 [db] Isolation [Hz] Reduction of structure-borne noise through bearing using Isotop SD steel springs 13

14 4 Solutions Elastic decoupling of a cooling tower using Isotop DZE elements 4.6 Cooling towers (recoolers) Cooling towers installed on a roof generate high levels of structure-borne noise during operation. Depending on the requirements regarding the eficiency of insulation, the systems are isolated using 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% Isolation curve, natural frequency 13.4 Hz [db] Isolation [Hz] 1 1 Recooler equipped with Sylomer bearings as standard 2 Structurally-strong bearing of a cooling tower using Isotop DZE 2 14

15 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 distance, 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, sandwichelements 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% Isolation curve, natural frequency 7.5 Hz [db] Isolation [Hz] 1 Bearing of a pump foundation using Sylodyn 2 Bearing of pumps with Isotop DZE elements

16 4 Solutions Bearing of an exhaust heat exchanger using Isotop DSD-BL steel spring dampers 4.8. Pipes and peripheral devices Pipes leading from or to energy sources (AC, HVAC etc.) generate structureborne 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 Isolation curve, natural frequency 4 Hz [db] Isolation Solution: Isotop / Sylomer Result: natural frequency of 4 Hz achieved, eficiency of insulation at 1,500 rpm (25 Hz) = 97.4% [Hz] Pipes decoupled using Isotop SD/Z 16

17 Double elastic bearing using Isotop SE-DE, overhead drive 4.9 Lift systems Lifts are used to transport individuals or loads between two or more levels in a moving cabin. During operation, the starting, stopping and general movement of the cabin generates vibrations that are transmitted to the structure of the building and perceived as structureborne noise. It is highly recommended that appropriate decoupling measures are considered 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 Most solutions are implemented with natural frequencies of between 10 and 15 Hz 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

18 5 Service Getzner develops customised solutions 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 experts is also lexible and able to react quickly to change requests. 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 calculation, 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 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 Smart from the start The bearing of all equipment is planned according to customer requirements and constructional considerations. Device or machine version (application 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 1 18

19 6 References Porsche Museum Stuttgart >> Solutions from Getzner are being used successfully all over the world. Renowned manufacturers in the processing industry, engineering and planning ofices as well as technical building service companies across the globe trust in the experience and quality of Getzner. As a recognised system partner, our company is involved from the moment 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 1 Oslo Opera House 2 Steigs (Mels) power plant 19

20 Getzner Werkstoffe GmbH Herrenau Bürs Austria T F info.buers@getzner.com Getzner Werkstoffe GmbH Am Borsigturm Berlin Germany T F info.berlin@getzner.com Getzner Werkstoffe GmbH Nördliche Münchner Str. 27a Grünwald Germany T F info.munich@getzner.com Getzner Spring Solutions GmbH Gottlob-Grotz-Str Bietigheim-Bissingen Germany T F info.stuttgart@getzner.com Getzner France S.A.S. Bâtiment Quadrille 19 Rue Jacqueline Auriol Lyon France T info.lyon@getzner.com Getzner Werkstoffe GmbH Middle East Regional Office Abdul - Hameed Sharaf Str. 114 Rimawi Center - Shmeisani P. O. Box Amman 11196, Jordan T F info.amman@getzner.com Getzner India Pvt. Ltd. 1st Floor, Kaivalya 24 Tejas Society, Kothrud Pune , India T F Nihon Getzner K.K. 6-8 Nihonbashi Odenma-cho Chuo-ku, Tokyo , Japan T F info.tokyo@getzner.com Beijing Getzner Trading Co.; Ltd. Zhongyu Plaza, Office 1806 Gongti Beilu Jia No Beijing, PR China T F info.beijing@getzner.com Getzner USA, Inc Red Oak Boulevard, Suite 528 Charlotte, NC, 28217, USA T info.charlotte@getzner.com B BSE en Copyright by Getzner Werkstoffe GmbH