AN AIR GRINDER EXHAUST MUFFLER
|
|
- Laurence Porter
- 8 years ago
- Views:
Transcription
1 AN AIR GRINDER EXHAUST MUFFLER Alexander Igolkin, Leonid Rodionov and Aleksandr Kryuchkov Samara State Aerospace University, Moskovskoye shosse 34, Samara, Russia The paper deals with the method of the sound pressure level reduction at the work places of the shop floor. During the manned carrier-rocket production process at the industrial enterprise JSK SRC Progress air tools are widely used. One of the pneumatic tool disadvantages is the high level noise. The authors conducted acoustic studies of various equipment work modes in the considered department. The main sources of the noise have been found and their acoustic characteristics have been experimentally determined. The main sources of the noise in department are air grinders. The noise sources spectra have been explored. Special measures are being proposed to noise level reduce at the work places. The most effective measure is the exhaust muffler using. The sketch had made and the prototype of the air grinder produced. The muffler efficiency has been tested in both SSAU lab and at the enterprise department. The efficiency of the exhaust muffler is 16 dba. 1. Introduction Technical progress leads to increasing of noise sources on the work places of various manufacturing and service organization. Various measures to reduce noise are developed [1, 2, 3, 4] and different tools to deal with noises are made [5,6,7,8,9,10]. To reduce the noise of the valve was developed special measures [4, 5, 6, 7]. In the paper [4] was developed special muffler with multiple orifice plate and soundproof case. In the papers [5] and [6] measures using solid friction and valve s poppet modifications to reduce tonal noise of the pilot-operated valve were developed. Without these measures self-exited oscillation of the valve appears [7]. Fluid power (pneumatic and hydraulic) systems are widely spread on various types of manufacture and they deserve special attention [2, 11]. Pneumatic and hydro-mechanical systems noise reduction is presented [2,4,11]. Air tools are widely used during processing details received by casting [5]. Exhaust muffler is the main device to decrease the noise generated by air tool. Some designs of muffler for pneumatic systems are described in the works [12,13,14,15]. 2. Initial noise condition at the workplace The main sources of the noise in department are 10 air grinders and 2 emery wheels. Noise and vibration analyzer Ecophysica [16] was used as the measurement system. Noise measurement results during emery wheel operating are presented in Figure 1. ICSV22, Florence (Italy) July
2 L, 100 db Off-loaded air grinder, Leq=101,2 dba Air grinder detail processing, Leq=99,4 dba k 1.6k 2.5k 4k 6.3k f, Hz Figure 1. The frequency characteristic of the emery wheel sound pressure level. Figure 1 shows that noise level caused by small-sized detail processing has increased by 11 dba. Moreover detail processing increases noise level at frequencies above 1000 Hz, which indicates the appearance of an additional high frequency noise source initiated by detail vibration. The noise spectrum of the air grinder at off-load and loaded regimes is shown in Figure 2. L, 100 db Off-loaded, Leq=76,4 dba Small-sized detail processing, Leq=87,2 dba k 1.6k 2.5k 4k 6.3k f, Hz Figure 2. The noise spectrum of the air grinder at no load and loaded regimes. Figure 2 presents that overall noise level increases on scale A during detail processing. Noise source ranking shows that the air grinder is more strong noise source (99 dba) than the emery wheel (76 dba). ICSV22, Florence, Italy, July
3 The main contribution to the overall sound pressure level, created by the air grinder, makes pneumatic drive exhaust noise, as indicated by the sound pressure characteristic at off-load (Fig. 2). Therefore, the main activity is the development and implementation of the exhaust muffler. Customer supplied its own exhaust muffler for research, effectiveness of which has been determined and the results are shown in Figure 3. L, 120 db Off-loaded air grinder (base muffler), Leq=96,2 dba Off-loaded air grinder (without muffler), Leq=101,2 dba Workplace standards, Leq= dba Background, Leq=69,8 dba 31, k 2k 3.15k 5k 8k f, Hz Figure 3. Efficiency studies of the base exhaust muffler. Figure 3 shows that the existing exhaust muffler effectiveness is 5 dba and is insufficient. Sanitary standards on noise at the workplace are not met [17]. Creating an exhaust muffler with effectiveness over 15 dba was main goal to the authors. 3. Development and production of exhaust muffler. Air grinder construction and operation regimes are similar, so one of them was chosen for research. Based on the experience of previous studies [18], the authors developed an original design of the exhaust muffler. Elastic porous material MR (Metal - Rubber) was used as sound-absorbing material. A prototype was made of the following parts (Fig. 4): 1. Air grinder; 2. T-shaped pipe; 3. The sound-absorbing element from the MR; 4,5 Centering aluminum ring; 6. Sound-absorbing (tablet shaped) material MR; 7. Fitting. ICSV22, Florence, Italy, July
4 Figure 4. Exhaust muffler prototype. Sound-absorbing material MR [19,20] is set in the space between the rings. Appearance of the prototype is shown in Figure Air grinder study Figure 5. Appearance of the muffler prototype. Experimental air grinder design acoustic efficiency studies were conducted in an anechoic acoustic chamber (Fig. 6) [21]. ICSV22, Florence, Italy, July
5 Figure 6. The air grinder location in an acoustic anechoic chamber. Adequate representation of the functioning pneumatic grinder baseline while conducting research in acoustic anechoic chamber should be ensured (sound pressure level frequency characteristics) (Fig. 7). Thus, pressure before the pneumatic tool in studies was 3.9 bar. L, 100 db 30 In the department, Leq=100,6 dba In the laboratory, Leq=96,9 dba 31, k 2k 3.15k 5k f, 8k Hz Figure 7. Simulation baseline result of the no loaded air grinder. Simulation baseline result is somewhat different from the values measured at the workplace (Fig. 7). It is cause by divergence in the inlet pressure in the air grinder. Thus, it is acceptable to conduct research and debugging of the exhaust muffler prototype carried out in laboratory. It is known that the acoustic characteristics and capacity of the sound-absorbing element made from MR is influenced by such parameters as porosity, initial wire diameter and sample thickness [17,25]. Studies were conducted sound absorbing effect of porosity of the sample (pos. 6 in Fig. 4) of the same thickness on efficiency muffler (Fig. 8). The porosity value - "1" is corresponding air tool without muffler. ICSV22, Florence, Italy, July
6 L, db Hz Scale A La, 98 dba ,8 0,7 0,6 Porosity 84 Figure 8. The dependence of the sample acoustic efficiency from its porosity. Figure 8 shows that the most effective sample has a porosity of 0.6. The porosity value lower than 0.6 leads to air consumption reducing. Pneumatic performance (rotation speed) with minimal porosity of the sample is not reduced more than 10%. The test construction results in the laboratory with various sound absorbing elements are shown in Figure 9. L, 110 db 100 Without the muffler, Leq=96,9 dba Tablet shaped MR (porosity 0,6) and lining MR, Leq=82,6 dba Tablet shaped MR (porosity 0,6), Leq=87,9 dba 30 31, k 2k 3.15k 5k f, 8k Hz Figure 9. Efficiency of the exhaust noise reduction. Figure 9 shows that muffler efficiency with tablet shaped MR (porosity - 0.6) is 9 dba. Due to its lack of efficiency sound absorbing lining MR (Pos. 3 in Fig. 4) was additionally used. Installing proposed muffler reduces the noise in the whole range of frequencies. The effectiveness of the experimental muffler design in the laboratory was 14.3 dba. Prototype has been tested at the department territory after conducting research in the laboratory. Sound pressure levels of the air grinder with a prototype muffler compared with the sanitary standards in the department are presented in Figure 10. All tests were conducted at off-load. Experimental muffler design is directed to noise reduction from the exhaust air grinder and does not affect the noise workflow (processing details). Therefore, detail processing was not considered while testing regimes. Designed muffler provides the required efficiency - not less than 15 dba. However, after reducing exhaust noise during testing in the department another noise source was found - the noise from ICSV22, Florence, Italy, July
7 bearings in the air grinder. Further noise reduction is possible due to the repair or replacement of bearings in the air grinder. L, 110 db 100 Workplace standards, La= dba Background, La=66,7 dba With the muffler, La=83,1 dba Without the muffler, La=99,8 dba 31, k 2k 4k f, Hz 8k Acknowledgements Figure 10. The results of sound pressure level measurements at the workplace. This work was supported by the Ministry of Education and Science of the Russian Federation. Future work As a recommendation to further noise reduction at the workplace it is necessary to furnish the room acoustic sound-absorbing material [21,22], which has a sufficient efficiency at high frequencies. References 1 Kryuchkov, A.N., Shakhmatov E.V., Samsonov, V.N., Druzhin, A.N. and Makaryants, G.M. Design Technique and Future-Proof Scheme of the Ship Pipe Anti-Noise Tool, Fundamentalnaya i Prikladnaya Gidrofizika, 7(3), 67-79, (2014). 2 Igolkin A.A., Kryuchkov, A.N., Makaryants G.M. Prokofiev A.B., Prokhorov, S.P., Shakhmatov E.V. and Shorin V.P. Snizheniye kolebaniy i shuma v pnevmogidromekhanicheskikh sistemakh, Samara State Aerospace University named after academician S.P. Korolev (National Research University), Samara, Russia, 314, (2005). 3 Ivanov, N.I. and Nikiforov, А.S. Foundations of Vibroacoustics, Polytechnika, Saint Petersburg, Russia, 482, (2000). 4 K.V. Blumin, K.V., Gafurov, S.A., Zubrilin, I.A., Makaryants, G.M., Kruchkov, A.N. and Shakhmatov, E.V. Design Methodology of Hydrodynamic Noise Silencer, Proceedings of the 20th International Congress on Sound & Vibration, Bangkok, Thailand 7-11 July, (2013). 5 Igolkin, A.A., Kryuchkov, A. N. and Shakhmatov E.V., Acoustic Performances of Air Tool, Proceedings of the 17th International Congress on Sound and Vibration, Cairo, Egypt, July, (2010). 6 Makaryants, G.M., Sverbil, V.Y., Shakhmatov, E.V., Makaryants, M.V., Stadnik, D.M. and Tumanov, D.V. Tonal Noise Reduction of Safety Pneumatic Valve of Indirect Action with Self-Excited Oscillations, Sudostroenie. 5, 49-51, (2012). ICSV22, Florence, Italy, July
8 7 Makaryants, G.M., Prokofiev, A.B., Sverbilov, V.Y., Shakhmatov, E.V. and Makaryants, M.V. Self-Oscillations of the Poppet Relief Pneumatic Valve Due to Instability of the Airflow around an Inlet Port, Proceedings of the 18th International Congress on Sound and Vibration, Rio de Janeiro, Brazil, July, (2011). 8 Igolkin, A.A., Rodionov, L.V. and Shakhmatov, E.V., Noise Decrease in Premises at the Expense of Application Dampers, Safety in technosphere. 4, -43, (2008). 9 Kolesnikov, V.A., Shakhmatov E.V. and Foyt, V.V. Damper, RUS Patent , Russian Federation: Samarskij gosudarstvennyj aehrokosmicheskij universitet im.s.p.koroleva, (1996). 10 Shakhmatov, E.V., Kryuchkov, A.N., Prokofiev, A.B., Golovin, A.N. and Belov, G.O. Using of Pressure Fluctuations Absorber to Reduce Vibroacoustic Loading of Hydromechanical Systems, Sudostroenie, 3, 45-47, (2011). 11 Gimadiev, A.G., Shakhmatov, E.V. and Shorin, V.P. Designing Dampers for Control-System Hydraulic Circuits, Power Engineering New York, 25(4), , (1987). 12 Shakhmatov, E.V., Kryuchkov, A.N Bogdanov, S.A., Seyfetdinov, R.B. and Belov, G.O. Glushitel' shuma, RUS Patent 71144, Russian Federation: Gosudarstvennoye obrazovatel'noye uchrezhdeniye vysshego professional'nogo obrazovaniya Samarskiy gosudarstvennyy aerokosmicheskiy universitet imeni akademika S.P. Koroleva, (2007). 13 Shakhmatov, E.V., Kryuchkov, A.N. and Igolkin, A.A. Pnevmoglushitel' s vysokochastotnym oblucheniyem, RUS Patent 713, Russian Federation: Gosudarstvennoye obrazovatel'noye uchrezhdeniye vysshego professional'nogo obrazovaniya Samarskiy gosudarstvennyy aerokosmicheskiy universitet imeni akademika S.P. Koroleva, (2007). 14 Nabiev, R.R., Khamatdinov. Z.Z., Nabiullin, V.Kh. and Valeev, R.F. Pneumatic Engine Noise Silencer, RUS Patent 21947, Russian Federarion: Obshchestvo s ogranichennoj otvetstvennost'ju firma "Tekhnoservis",Otkrytoe aktsionernoe obshchestvo "Uralo-Sibirskie magistral'nye nefteprovody im. D.A.Chernjaeva", (2000). 15 Kojakov, V.F.,Kojakov. O.V. and Kojakov, S.V.Silencer, RUS Patent 20446, Russian Feredation: Kojakov Vasilij Fedorovich, (1993). 16 GOST , Noise. Methods of Noise Measurement in Residential Areas and in the Rooms of Residential, Public and Community Buildings, 22, (1982). 17 SN 2.2.4/ Shum na rabochikh mestakh, v pomeshcheniyakh zhilykh, obshchestvennykh zdaniy i na territo-rii zhiloy zastroyki, 8, (1996). 18 Shakhmatov, E.V., Kryuchkov, A.N., Bogdanov, S.A. and Nazarov, O.V. Zvukopogloshchayushchaya konstruktsiya s perforirovannym zapolnitelem v vide skladchatoy struktury, RUS Patent 61353, Russian Federation: Gosudarstvennoye obrazovatel'noye uchrezhdeniye vysshego professional'nogo obrazovaniya Samarskiy gosudarstvennyy aerokosmicheskiy universitet imeni akademika S.P. Koroleva, (2007). 19 Igolkin A.A., Izzheurov, E.A., Safin A.I., Shakhmatov E.V. The Use of Porous Material «Metallorubber» in Hydraulic Gas Systems of Power Plants for Noise Damping and Temperature Stabilizing, Sudostroenie. 5, 46-48, (2012). 20 Igolkin, A.A., Izzheurov, E.A., Shakhmatov, E.V. and Hongyuan J. Acoustic Performances of Metal Rubber, Proceedings of the 18th International Congress on Sound and Vibration, Rio de Janeiro, Brazil, July, (2011). 21 Kokh, A.I., Krjuchkov, A.N., Sejfetdinov, R.B. and Shakhmatov, E.V. Muffled Acoustic Chamber, RUS Patent , Russian Federation: Gosudarstvennoye obrazovatel'noye uchrezhdeniye vysshego professional'nogo obrazovaniya Samarskiy gosudarstvennyy aerokosmicheskiy universitet imeni akademika S.P. Koroleva, (2010). 22 Lenchine,V.V., Makaryanz, G.M. and Shakhmatov, E.V. Database for Choosing of Materials for Acoustic Furnishing of Premises, Proceedings of the Samara Scientific Center of the Russian Academy of Sciences, 1(1), 137-1, (1999). ICSV22, Florence, Italy, July
A.L. Sivkov, E.V. Belov REDUCTION OF NOISE OF A HELICOPTER ENGINE BASED ON RESEARCHES OF ACOUSTIC FIELDS OF LIGHT AND MEDIUM HELICOPTERS
A.L. Sivkov, E.V. Belov REDUCTION OF NOISE OF A HELICOPTER ENGINE BASED ON RESEARCHES OF ACOUSTIC FIELDS OF LIGHT AND MEDIUM HELICOPTERS The Kazan State Power Engineering Institute The Kazan Branch of
More informationHow To Reduce Noise From A Test Screen
Practical Approaches to Engineering Noise Controls Dave Yantek Mining Hearing Loss Prevention Workshop June 21-22, 22, 2005 Pittsburgh Research Laboratory Basics of sound Topics Measurement of sound Measurement
More informationPROMPT ENGINEERING & TRADING SERVICES CO. W.L.L P.O. BOX 24067 BARWA VILLAGE, WAKRA, BUILDING NO. 6 SHOP NO. 19 AND 20 DOHA QATAR
This is to signify that PROMPT ENGINEERING & TRADING SERVICES CO. W.L.L P.O. BOX 24067 BARWA VILLAGE, WAKRA, BUILDING NO. 6 SHOP NO. 19 AND 20 DOHA QATAR Calibration Laboratory CL-165 has met the requirements
More information3.0 Exhaust Muffler Design Principles. 3.1 Basic Concepts
3.0 Exhaust Muffler Design Principles 3.1 Basic Concepts Internal combustion engines are typically equipped with an exhaust muffler to suppress the acoustic pulse generated by the combustion process. A
More informationEXPERIMENTAL RESEARCH ON CHARACTERISTICS OF CENTRIFUGAL PUMP NOISE IN WATER PIPE SYS- TEM
The 21 st International Congress on Sound and Vibration 13-17 July, 2014, Beijing/China EXPERIMENTAL RESEARCH ON CHARACTERISTICS OF CENTRIFUGAL PUMP NOISE IN WATER PIPE SYS- TEM Muze Huang, Hongling Sun,
More informationMEMBRANE VACUUM MINI PUMPS
MEMBRANE VACUUM MINI PUMPS The mini pumps described in this page are membrane-type. They can be used both as vacuum pumps and compressors. In the latter version they can supply compressed air 100% oil-free
More informationDirect Operated Regulator for 6.0 MPa (Relieving Type) How to Order. Body size 30 40
Direct Operated Regulator for (Relieving Type) Series Service life: 0 million cycles Using NSF-H-certified grease on the guide ring (sliding) part. Improved durability under a high environment with a polyurethane
More informationinter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering 27-30 August 2000, Nice, FRANCE
Copyright SFA - InterNoise 2000 1 inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering 27-30 August 2000, Nice, FRANCE I-INCE Classification: 2.1 WHISTLING PHENOMENA
More informationTesting Capabilities. Worldwide Designers & Manufacturers of Air Moving Equipment
Testing Capabilities Twin Twin City City Fan Fan Companies, Companies, Ltd. Ltd. Worldwide Designers & Manufacturers of Air Moving Equipment TestingCapabilities Twin City Fan Companies, Ltd. In today s
More informationBuilding Design for Advanced Technology Instruments Sensitive to Acoustical Noise
Building Design for Advanced Technology Instruments Sensitive to Acoustic Noise Michael Gendreau Colin Gordon & Associates Presentation Outline! High technology research and manufacturing instruments respond
More informationTOP 10 NOISE CONTROL TECHNIQUES
TOP 10 NOISE CONTROL TECHNIQUES The following are 10 simple noise control techniques that have wide application across the whole of industry. In many cases, they will produce substantial noise reductions
More informationDEVELOPMENT OF HIGH SPEED RESPONSE LAMINAR FLOW METER FOR AIR CONDITIONING
DEVELOPMENT OF HIGH SPEED RESPONSE LAMINAR FLOW METER FOR AIR CONDITIONING Toshiharu Kagawa 1, Yukako Saisu 2, Riki Nishimura 3 and Chongho Youn 4 ABSTRACT In this paper, we developed a new laminar flow
More informationEurovacuum EV Series. Single Stage Oil Sealed Rotary Vane Pump
Eurovacuum EV Series Single Stage Oil Sealed Rotary Vane Pump Eurovacuum EV Series Single Stage Oil Sealed Rotary Vane Pumps Eurovacuum Company is offering its various products to meet industrial vacuum
More informationHybrid Modeling and Control of a Power Plant using State Flow Technique with Application
Hybrid Modeling and Control of a Power Plant using State Flow Technique with Application Marwa M. Abdulmoneim 1, Magdy A. S. Aboelela 2, Hassen T. Dorrah 3 1 Master Degree Student, Cairo University, Faculty
More informationINTERNATIONAL JOURNAL OF RESEARCH SCIENCE & MANAGEMENT
PREDICTION OF TRANSMISSION LOSS FOR CYLINDRICAL EXPANSION CHAMBER HAVING CENTRAL-OUTLET AND SIDE-OUTLET CONFIGURATION BY TRANSFER MATRIX METHOD Amit Kumar Gupta 1*, Neha Mathur 2 1* Mechanical Engineering
More information3 WAY (3/2) POPPET VALVES FOR AIR AND VACUUM SERVICE SOLENOID OR AIR ACTUATED BROCHURE N-223
3 WAY (3/2) POPPET VALVES FOR AIR AND VACUUM SERVICE SOLENOID OR AIR ACTUATED BROCHURE N-223 HERION S HIGH PERFORMANCE POPPET VALVES For those applications requiring high Cv, fast response times, large
More information5 Port Pilot Operated Solenoid Valve Rubber Seal. Specifications Fluid Operating pressure range. 2 position single/3 position 2 position double
For details about certified products conforming to international standards, visit us at www.smcworld.com. 5 Port Pilot Operated Solenoid Valve Rubber Seal Series VF3000 Compact and lightweight: 26.4 mm
More informationCOUNTERBALANCE VALVES
COUNTERBALANCE VALVES Introduction They are modulating valves which allow free flow into the actuator and then block the reverse flow until they feel a pilot pressure inversely proportional to the load
More informationAPPLICATION NOTE How to Deal with Electrical Noise and Interference in the Measuring Chain using a NEXUS
APPLICATION NOTE How to Deal with Electrical Noise and Interference in the Measuring Chain using a NEXUS Conditioning Amplifier by Claus Lindahl and Bernard Ginn, Brüel&Kjær When making vibration measurements,
More informationVehicle NVH Development. www.novomec.com info@novomec.com Tel: +90 216 7061324 Fax: +90 216 7061284
Vehicle NVH Development 1 Contributions on Different Product Development Phases NVH Development Phases Novomec Engineering provides consultancy and hands on project services throughout the complete vehicle
More informationCALEFFI. Compact automatic flow rate regulator with polymer cartridge. 127 series 01166/09 GB
Compact automatic flow rate regulator with polymer cartridge 127 series REGISTERED BS EN ISO 9001:2000 Cert. n FM 21654 UNI EN ISO 9001:2000 Cert. n 0003 CALEFFI 01166/09 GB Function The AUTOFLOW devices
More informationBasic Hydraulics and Pneumatics
Basic Hydraulics and Pneumatics Module 1: Introduction to Pneumatics PREPARED BY IAT Curriculum Unit March 2011 Institute of Applied Technology, 2011 ATM 1122 Basic Hydraulics and Pneumatics Module 1:
More informationVibration and Noise Information
Author TOOJH Rev(1) Product Ergonomics & Industrial Design 9 Jan -14 Page 1(25) Vibration and Noise Information VIBRATION AND NOISE INFORMATION... 1 INTRODUCTION... 2 GENERAL INFORMATION VALID FOR MOST
More informationtechnical data air conditioning systems RXS20-25-35E (single phase) FBQ-B8V1-B8V3B Split Heat Pump Condensing Units Split Sky Air
technical data RXS20-25-35E FBQ-B8V-B8V3B (single phase) Split Heat Pump Condensing Units air conditioning systems Split Sky Air Outdoor Units R-40A RXS-E2VB Split Sky Air Outdoor Units Features O u t
More informationNoise Control Solutions For Standby Power Generators
Noise Control Solutions For Standby Power Generators by David Gries NVH Applications Engineer E-A-R Specialty Composites Indianapolis, Indiana Introduction Over the past several years, there has been
More informationJournal bearings/sliding bearings
Journal bearings/sliding bearings Operating conditions: Advantages: - Vibration damping, impact damping, noise damping - not sensitive for vibrations, low operating noise level - dust tight (if lubricated
More informationPAGE 2. Figure 1: Difference between PWL ins and SPL 1m
PAGE 1 Pipe noise J.H. Granneman and R.P.M. Jansen, Peutz Consulting Engineers, The Netherlands, emphasise the need for an adequate pipe noise control procedure, with reference to the design phase, insulation
More informationINDUSTRIAL DIRECT DRIVEN PISTON COMPRESSORS CL - CH - CK
INDUSTRIAL DIRECT DRIVEN PISTON COMPRESSORS CL - CH - CK CL - CH - CK Direct driven solution for industry Proven technology, solid construction The CL - CH - CK units are directly driven air-cooled, single
More informationPerformance Improvement of Pump-turbine for Large Capacity Pumped Storage Power Plant in USA
Performance Improvement of Pump-turbine for Large Capacity Pumped Storage Power Plant in USA 198 Performance Improvement of Pump-turbine for Large Capacity Pumped Storage Power Plant in USA 300-MW Pump-turbine
More informationSUGGESTED SPECIFICATION EXHAUST SYSTEM SILENCER, FLEX CONNECTOR, INSULATION BLANKETS, WALL / ROOF THIMBLES
SUGGESTED SPECIFICATION EXHAUST SYSTEM SILENCER, FLEX CONNECTOR, INSULATION BLANKETS, WALL / ROOF THIMBLES 4121 N.W. 37 th Street, Lincoln, NE 68524 Telephone (402) 470-2627 Fax (404) 470-2410 www.gtexhaust.com
More informationLABORATORY TESTS OF ACTIVE SUSPENSION SYSTEM
Journal of KONES Powertrain and Transport, Vol. 18, No. 1 2011 LABORATORY TESTS OF ACTIVE SUSPENSION SYSTEM Jaros aw Konieczny AGH University of Science and Technology, Department of Process Control Mickiewicz
More informationExhaust noise control case study for 2800 class locomotive
Exhaust noise control case study for 2800 class locomotive Briony CROFT 1 ; Steve BROWN 2 ; Aaron MILLER 3, Andrew PARKER 4 1 SLR Consulting (Canada) Ltd, Canada 2,3,4 SLR Consulting Australia Pty Ltd,
More informationHorns. Buzzers 6.02-6.03, 6.06. Compressed air horns 6.09-6.10. Disc-type horns 6.05-6.06. Electric twin-tone horns 6.08
Buzzers 6.02-6.03, 6.06 Compressed air horns 6.09-6.10 Disc-type horns 6.05-6.06 Electric twin-tone horns 6.08 6.03-6.04 Supertone horns 6.07 6 EE 07 6.01 Part no. Pk. Buzzers With bracket, Two 6.3 mm
More informationA simple method to compute aircraft noise inside dwellings
The 33 rd International Congress and Exposition on Noise Control Engineering A simple method to compute aircraft noise inside dwellings C. Brutel-Vuilmet, M. Villot and P. Jean CSTB, 24 av Joseph Fourier,
More informationBNAM 2008 BERGEN BYBANE NOISE REDUCTION BY TRACK DESIGN. Reykjavik, august 2008. Arild Brekke, Brekke & Strand akustikk as, Norway
BNAM 08 BERGEN BYBANE NOISE REDUCTION BY TRACK DESIGN Dr.ing Arild Brekke Brekke & Strand akustikk as Box 1024 Skøyen 0218 Oslo Email: arild.brekke@bs-akustikk.no Introduction BNAM 08 A city line now is
More informationNoise control technology. www.inercoacustica.com
Noise control technology INERCO Acústica is the INERCO GROUP company specialized in engineering, developing technology, manufacturing and implementation of solutions for noise and vibration control. INERCO
More informationTHE POSSIBILITIES OF RUNNER PLACEMENTS FOR CASTINGS PRODUCED BY SPIN CASTING INTO SILICON RUBBER MOULDS. Matej BEZNÁK, Martin BAJČIČÁK, Roland ŠUBA
THE POSSIBILITIES OF RUNNER PLACEMENTS FOR CASTINGS PRODUCED BY SPIN CASTING INTO SILICON RUBBER MOULDS Matej BEZNÁK, Martin BAJČIČÁK, Roland ŠUBA Authors: Matej Beznák, Assoc. Prof. PhD., Martin Bajčičák,
More informationACOUSTIC CAVITIES DESIGN PROCEDURES
ACOUSTIC CAVITIES DESIGN PROCEDURES A. Santana Jr. a, M. S. Silva b, P. T. Lacava. b, and L. C. S. Góes b a Instituto de Aeronáutica e Espaço Divisão de Sistemas Espaciais CP. 12228-94, São José Campos,
More informationNoise associated with the ground water systems serving residential geothermal heat pumps
Noise associated with the ground water systems serving residential geothermal heat pumps Jeffrey L. FULLERTON 1 Acentech Incorporated, United States ABSTRACT Geothermal heat pumps are an energy efficient
More informationHOW TO ORDER SAFETY PRODUCTS/SAFETY CONTROL SYSTEMS ELECTRICAL SAFETY CONTROLS
HOW TO ORDER SAFETY PRODUCTS/SAFETY CONTROL SYSTEMS PNEUMATIC SAFETY CONTROLS BASIC CONTROLS SC3000 - SELF CONTAINED 2 HAND CONTROL - STAND ALONE MODEL SC3300 - SELF CONTAINED 2 HAND CONTROL - PRESS READY
More informationUnit 24: Applications of Pneumatics and Hydraulics
Unit 24: Applications of Pneumatics and Hydraulics Unit code: J/601/1496 QCF level: 4 Credit value: 15 OUTCOME 2 TUTORIAL 3 HYDRAULIC AND PNEUMATIC MOTORS The material needed for outcome 2 is very extensive
More informationAbsorption mufflers in exhaust systems. Rolf Jebasinski. J. Eberspächer GmbH & Co. Abstract
1 Absorption mufflers in exhaust systems Rolf Jebasinski J. Eberspächer GmbH & Co Abstract Absorption mufflers or combined absorption/reflection mufflers are an almost indispensable element of modern exhaust
More informationTD-SILENT Series (160 to 1000 models) TD-SILENT Series (1300 and 2000 models) NEW TD-SILENT. In-Line duct fans
IN-LINE MIXED LOW DUT ANS ultra-quiet Series (16 to 1 models) Low profile Mixed-flow fans with sound-absorbent insulation. Extremely quiet. ertified of Approval Noise Abatement Society (TD-35, TD-5, TD-8
More informationGeneral Design Principles for an Automotive Muffler
Proceedings of ACOUSTICS 2005 9-11 November 2005, Busselton, Western Australia General Design Principles for an Automotive Muffler Potente, Daniel Day Design Pty Ltd, Acoustical Consultants, Sydney, NSW
More informationTrouble shooting for die cast machine. customer service department of L.K Group
Trouble shooting for die cast machine customer service department of L.K Group A. Faults Detect and the Steps for Repair Important When faults occurred on die casting machine operation. Operators should
More informationTYPE APPROVAL CERTIFICATION SCHEME MASS PRODUCED DIESEL ENGINES
1. Introduction TYPE APPROVAL CERTIFICATION SCHEME MASS PRODUCED DIESEL ENGINES 1.1 This scheme details the tests and inspection of diesel engines manufactured by mass production system for use in marine
More informationTYPE E Main Valve Sizes 3 /8 through 12
SD 3001F PRINTED IN U.S.A. SD 3001F/0707 A B TYPE E MAIN VALVE C D E TYPE E Main Valve Sizes 3 /8 through 12 The Spence Type E Main Valve is of normally closed, single seat design featuring packless construction,
More information3 Port Solenoid Valve
Port Solenoid Valve Series V00 Rubber Seal Power consumption 0. W (with power saving circuit) VV0 VV00 V00 -V F VS temperature rises: C (with power saving circuit) Sonic conductance Series Standard Large
More informationTURBOWENT TULIPAN - rotary chimney cowl Ø150
Picture Function principle rotation direction Wind Chimney draught Description Rotary chimney cowl Turbowent Tulipan is a device, which, in a dynamic way, uses force of the wind to increase chimney draught.
More informationNew SACE Emax 2 for UL 1066 From Circuit Breaker to Power Manager
New SACE Emax 2 for UL 1066 From Circuit Breaker to Power Manager 2 1SDC200039B0201 New SACE Emax 2 for UL 1066 Circuit breakers switch power SACE Emax 2 manages it. SACE Emax 2 is the new benchmark of
More informationSOLENOID VALVES AND PNEUMATIC VALVES
2 A S E R I E S Catalogue 2005-2006 Directly operated solenoid valves Series A 2/2 way, 3/2 way monostable, bistable (with magnetic memory) Ports M5,, cartridge ø4 The Series A solenoid valves are of the
More informationThe Auto-tensioner Market and Technical Trends
NTN TECHNICAL REVIEW No.73 2005 Technical Article The Auto-tensioner Market and Technical Trends Satoshi KITANO Tadahisa TANAKA Tomokazu NAKAGAWA Automotive engines generally use accessory drive belts,
More informationMASTER CYLINDER. Section 2. Master Cylinder. Tandem Master Cylinder. Master Cylinder
MASTER CYLINDER Master Cylinder The master cylinder converts the motion of the brake pedal into hydraulic pressure. It consists of the reservoir tank, which contains the brake fluid; and the piston and
More informationSome Recent Research Results on the use of Acoustic Methods to Detect Water Leaks in Buried Plastic water Pipes
Some Recent Research Results on the use of Acoustic Methods to Detect Water Leaks in Buried Plastic water Pipes M.J. Brennan*, P.F. Joseph, J.M. Muggleton and Y. Gao Institute of Sound and Vibration Research,
More informationAPPLYING VIRTUAL SOUND BARRIER AT A ROOM OPENING FOR TRANSFORMER NOISE CONTROL
APPLYING VIRTUAL SOUND BARRIER AT A ROOM OPENING FOR TRANSFORMER NOISE CONTROL Jiancheng Tao, Suping Wang and Xiaojun Qiu Key laboratory of Modern Acoustics and Institute of Acoustics, Nanjing University,
More informationEnclosures 1-866-338-0988. DuraSystems Barriers, Inc. www.durasystems.com Email: sales@durasystems.com. The Passive Fire Protection Specialists
Enclosures Sturdy single and double wall fire protection construction Impact resistant Fast & easy installation Pre-manufactured and modular Available in galvanized, stainless steel & other specialty metals
More informationSUPER 600. Tracked Paver SUPER 600. Pave Widths 0.5m 2.7m. Maximum Laydown Rate 200 tonnes/h. Clearance Width 1.2m
SUPER 600 Tracked Paver SUPER 600 Pave Widths 0.5m 2.7m Maximum Laydown Rate 200 tonnes/h Clearance Width 1.2m Mini Paver for Maximum Efficiency on Minor Job Sites T hanks to its compact size, variable
More informationExperiment # 3: Pipe Flow
ME 05 Mechanical Engineering Lab Page ME 05 Mechanical Engineering Laboratory Spring Quarter 00 Experiment # 3: Pipe Flow Objectives: a) Calibrate a pressure transducer and two different flowmeters (paddlewheel
More informationThe Role of Acoustics in Curtain Wall Design:
The Role of Acoustics in Curtain Wall Design: Strategies to Achieve Desired Performance Criteria April 22, 2015 John LoVerde, Principal VENEKLASEN ASSOCIATES, INC. Goals Basics of Acoustics Ratings in
More informationMODEL KS-301-F K Á L M Á N S Y S T E M L T D. H - 1 1 2 5 B U D A P E S T, T R E N C S É N I U. 1 6.
MODEL KS-301-F HIGHT VOLUME FLOW SAMPLER FOR SOLID PARTICLES, AEROSOLS, PAH AND PCDDS TSP, OR WITH PM10/PM2,5/1 PRESEPARATOR. CONTAINER-MOUNTED VERSION KÁLMÁN SYSTEM SINCE 1976 KS-301-F HIGH VOLUME FLOW
More informationTHE MODELING AND CALCULATION OF SOUND RADIATION FROM FACILITIES WITH GAS FLOWED PIPES INTRODUCTION
THE MODELING AND CALCULATION OF SOUND ADIATION FOM FACILITIES WITH GAS FLOWED PIPES INTODUCTION Analysis o the emission caused by industrial acilities like chemical plants, reineries or other production
More informationAutomatic Back-Flushing Filter AutoFilt RF9.
Automatic Back-Flushing Filter AutoFilt RF9. AutoFilt RF9 Clearing the Way. The Challenge: In response to the Tier III standard which will come into effect in 2016, the International Maritime Organization
More informationRated Power(W) 8W 2. EG-LED0840-01 8W 3. EG-LED1027-01 10W
14713221 001 Seite 2 von 37 Page 2 of 37 Model List: No Model Rated Voltage(V) 1. EG-LED0827-01 Rated Power(W) 8W 2. EG-LED0840-01 8W 3. EG-LED1027-01 10W 4. EG-LED1040-01 AC 100-240V, 10W 5. EG-LED1027-02
More informationL.I. Chubraeva. Corr. Member of RAS
STATE-OF OF-THE-ART AND NEW DEVELOPMENTS IN HIGH-TEMPERATURE CUPERCONDUCTIVITY IN RUSSIA L.I. Chubraeva Corr. Member of RAS Director of Research Institute of Innovative Technologies in Electromechanics
More informationFAN PROTECTION AGAINST STALLING PHENOMENON
FAN PROTECTION AGAINST STALLING PHENOMENON Roberto Arias Álvarez 1 Javier Fernández López 2 2 1 ZITRON Technical Director roberto@zitron.com ZITRON Technical Pre Sales Management jfernandez@zitron.com
More informationUNIVERSITY OF MISSOURI 23 0000 - Heating Ventilating and Air-Conditioning (HVAC) March 2015.01
GENERAL: This section provides general standards for overall sizing and design of Heating, Ventilating, and Air Conditioning (HVAC) systems. Other sections contain specific standards for each system per
More informationREAL CHAMBERS CORPORATION SQL PRE-INSTALLATION/ SITE PREPARATION MANUAL
REAL CHAMBERS CORPORATION SQL PRE-INSTALLATION/ SITE PREPARATION MANUAL Real Chambers Corporation 10392 E. 48 th Avenue Denver, CO 80238 USA 23001048 Rev. E 1 of 7 TABLE OF CONTENTS OVERVIEW... 3 SAFETY...
More informationMicW i436 on iphone 6 / iphone 6 Plus basedreal Time
Technical Note 1501 MicW i436 on iphone 6 / iphone 6 Plus basedreal Time Analyzers (RTA) 1. Introduction With new iphone 6 and iphone 6 Plus being released in October 2014, the iphone based real time analyzer
More informationManual Analysis Software AFD 1201
AFD 1200 - AcoustiTube Manual Analysis Software AFD 1201 Measurement of Transmission loss acc. to Song and Bolton 1 Table of Contents Introduction - Analysis Software AFD 1201... 3 AFD 1200 - AcoustiTube
More informationTesting laboratory HVAC. Test report No.: HP-06525-e
Testing laboratory HVAC Test report No.: HP-62-e Objective: Sound measurements on an air distribution box and an air inlet Client: RoomAir AG Thurstrasse 14 Postfach 81 Frauenfeld Date: 26-6-2 This report
More informationA Practical Guide to Free Energy Devices
A Practical Guide to Free Energy Devices Electrolysis Patents No 14: Last updated: 28th January 2006 Author: Patrick J. Kelly Please note that this is a re-worded excerpt from this patent. If the content
More informationAnalysis of free reed attack transients
Analysis of free reed attack transients James Cottingham Physics Department, Coe College, Cedar Rapids, Iowa, United States Summary Attack transients of harmonium-type free reeds from American reed organs
More informationElectro-pneumatic control valves
Electropneumatic control valves 7 Miniature solenoid valves for alternating current Conform to the Low Voltage Directive or mounting on subbase or footprint in accordance with CNOMO recoendation E 066120N
More information1. SYSTEM OVERVIEW. 1) Basic Theory of ABS Function 10-3 4891-01
10-3 1. SYSTEM OVERVIEW When braking suddenly or braking on slippery roads, the vehicle keeps moving forward but the wheels are locking and not rotating. If these happen, the vehicle may lose stability
More informationSingle sub-base valve
solenoid valves Mini-valves 10 mm Electrical connection... Mounting... Port sizes... Rated temperature... Fluid... Working pressure... Nominal flow... Pneumatic connections Voltage... Power... NC poppet
More informationROOM ACOUSTICS DESIGN. Room Acoustics Design Intent: Appropriate Articulation
ROOM ACOUSTICS DESIGN http://mikebm.files.wordpress.com/2008/06/walt-disney-hall-1.jpg Ball State Architecture ENVIRONMENTAL SYSTEMS 1 Grondzik 1 Room Acoustics Design Intent: Appropriate Articulation
More informationMASTER OF ENGINEERING Mechanical Engineering Program
MASTER OF ENGINEERING Mechanical Engineering Program Note: On-line registration is available to CURRENT M.Eng. students only. NEW students are NOT permitted to register on-line for their first semester.
More informationActive noise control in practice: transformer station
Active noise control in practice: transformer station Edwin Buikema 1 ; Fokke D. van der Ploeg 2 ; Jan H. Granneman 3 1, 2, 3 Peutz bv, Netherlands ABSTRACT Based on literature and extensive measurements
More informationMaintenance and Service Instruction
Screw pumps E4 Maintenance and Service Instruction E4 1 IMO AB This instruction is valid for all E4 pump models shown on page 2 Contents Page List of components 2 Exploded view/ordering code 3 Service
More information1.1 DIMENSIONS AND WEIGHT PAG. 2 1.2 LOAD CENTRE FOR LIFTING PAG. 2 1.3 STORAGE CONDITIONS PAG. 2
TRANSPORT AND INSTALLATION. DIMENSIONS AND WEIGHT PAG.. LOAD CENTRE FOR LIFTING PAG..3 STORAGE CONDITIONS PAG. STARTING. INSTALLATION PAG.. SPACE REQUIREMENTS PAG. 3.3 ELECTRIC CONNECTION PAG. 3 3 DESCRIPTION
More informationEFFECT OF OBSTRUCTION NEAR FAN INLET ON FAN HEAT SINK PERFORMANCE
EFFECT OF OBSTRUCTION NEAR FAN INLET ON FAN HEAT SINK PERFORMANCE Vivek Khaire, Dr. Avijit Goswami Applied Thermal Technologies India 3rd Floor,C-Wing,Kapil Towers, Dr. Ambedkar Road, Pune- 411 1 Maharashtra,
More informationData Centres A complete solution to noise control and acoustic packages
Data Centres A complete solution to noise control and acoustic packages Introduction World class noise control. Expertise you can trust. IAC Acoustics is world-renowned for providing cost effective solutions
More informationENGINEERING NOISE CONTROL
10 ENGINEERING NOISE CONTROL Professor Colin H. Hansen Department of Mechanical Engineering University of Adelaide South Australia 5005 AUSTRALIA chansen@mecheng.adelaide.edu.au Dr Berenice I.F. Goelzer*
More informationThe Acoustical design of Mobile phones
Proceedings of 20 th International Congress on Acoustics, ICA 2010 23-27 August 2010, Sydney, Australia The Acoustical design of Mobile phones Yasuharu Onishi (1), Jun Kuroda (1), Yukio Murata (1), Motoyoshi
More informationInrush Apparent power (VA) Flow Characteristics/Weight. Port size Rc. Valve model VS3115-01 VS3115-02 VS3110-02 VS3110-03 VS3114-00.
Port Direct Operated Solenoid Valve Series VS5/0 Metal Seal Multiple pressure supply is possible with balanced spool sleeve. Any given port can accept high or low pressure supply without affecting the
More informationSigma Frequency Control
Sigma Frequency Control SFC Series 18 to 515 Capacities: from 22 to 3069 cfm Pressures: from 80 to 217 psig Variable Speed Technology from Kaeser Most compressed air systems have varying loads and it is
More informationNews in Data Center Cooling
News in Data Center Cooling Wednesday, 8th May 2013, 16:00h Benjamin Petschke, Director Export - Products Stulz GmbH News in Data Center Cooling Almost any News in Data Center Cooling is about increase
More informationTop Technology for Industry, Agriculture, Business and Communities
Top Technology for Industry, Agriculture, Business and Communities CHP The Technology with a Potential for Saving Energy Combined Heat and Power (CHP) is a highly efficient technology for the conversion
More informationAutomotive Sensor Simulator. Automotive sensor simulator. Operating manual. AutoSim
Automotive sensor simulator Operating manual AutoSim Contents Introduction.. page 3 Technical specifications.... page 4 Typical application of AutoSim simulator..... page 4 Device appearance... page 5
More informationINC Flexi-Sorb. Versatile Flexible Easy To Install Durable Good Noise Reduction Economical. Typical Applications
INC Flexi-Sorb Noise Control Curtain System Versatile Flexible Easy To Install Durable Good Noise Reduction Economical Our Flexi-Sorb noise control curtain product line consists of flexible, durable acoustical
More informationQPM3 Low pressure pump for circulation of oil in hydraulic and lubricating systems
The Professional Choice in Fluid Management QPM3 Low pressure pump for circulation of oil in hydraulic and lubricating systems The Olaer Group is a global player specialising in innovative, efficient system
More informationAcoustical Design Guidelines for HVAC Systems in Schools
Acoustical Design Guidelines for HVAC Systems in Schools Seminar 9, ASHRAE Summer Meeting Albuquerque, New Mexico Sponsor: TC 2.6 Sound and Vibration Robert M. Lilkendey Associate Principal Consultant
More informationMicro cogeneration. Affordable, efficient and innovative
Micro cogeneration Affordable, efficient and innovative A compact and efficient solution A compact and efficient solution Organisations are increasingly looking for environmentally friendly systems to
More informationHydraulic control unit series 0086-372-01
Technical Product Information No. 1290 EN Hydraulic control unit series 0086-372-01 Contents Page About this Technical Product Information (TPI) 2 The ORTLINGHAUS numbering system 2 About the product 3
More informationAttachment J-C18.1. HVAC Work Instructions
. RFP: Attachment J-C18.1 HVAC Work Instructions NNC13ZFD017J SOW Item No. Title Page C18-02 Control Air Systems Annual PM 2 C18-03 Split System AC Indoor Section Annual PM 3 C18-04 Condensing Unit Semi-Annual
More informationThermoelectric Generator (TEG) for Heavy Diesel Trucks John C. Bass, Aleksandr S. Kushch, Norbert B. Elsner Hi-Z Technology, Inc.
Thermoelectric Generator (TEG) for Heavy Diesel Trucks John C. Bass, Aleksandr S. Kushch, Norbert B. Elsner Hi-Z Technology, Inc. Abstract An improved TEG for the Heavy Duty Class Eight Diesel Trucks is
More informationInternational Journal of Engineering Research-Online A Peer Reviewed International Journal Articles available online http://www.ijoer.
RESEARCH ARTICLE ISSN: 2321-7758 DESIGN AND DEVELOPMENT OF A DYNAMOMETER FOR MEASURING THRUST AND TORQUE IN DRILLING APPLICATION SREEJITH C 1,MANU RAJ K R 2 1 PG Scholar, M.Tech Machine Design, Nehru College
More informationجامعة البلقاء التطبيقية
AlBalqa Applied University تا سست عام 997 The curriculum of associate degree in Air Conditioning, Refrigeration and Heating Systems consists of (7 credit hours) as follows: Serial No. Requirements First
More informationSERIES ASM NEOPRENE/EPMD FLANGED SINGLE SPHERE CONNECTOR CONNECTORS. Pressures to 225 PSIG (15.51 barg) Temperatures to 230ºF (110ºC)
APPLICATIONS Process Industry Weak Acids Alkalies Compressed Air Pulp & Paper MODELS ASM - Flanged Connection OPTIONS Control Rods Oil & Gas Water & Waste Pump suction & discharge Sea water Chemical lines
More informationCHAPTER 3 MODAL ANALYSIS OF A PRINTED CIRCUIT BOARD
45 CHAPTER 3 MODAL ANALYSIS OF A PRINTED CIRCUIT BOARD 3.1 INTRODUCTION This chapter describes the methodology for performing the modal analysis of a printed circuit board used in a hand held electronic
More information