noise and vibration priority low

... Niemann, G and Baethge, J., 'Transmission error, tooth stiffness, and noise of parallel axis gears.' VDI-Z, Vol 2, 1970, No and No Palmer, D and Munro, R.G., 'Measurements of transmission error, vibration ... however, noise is the critical factor, "design load" may refer to the condition where noise has to be a minimum and may be only 10% of the permitted maximum load If the requirement is for minimum noise ... short, or intermediate relief In 1970, Neimann in Germany [4] and Munro in the U.K introduced and developed the ideas of "long" and "short" relief designs for the two extreme load cases where...

Ngày tải lên: 13/12/2013, 03:15

... Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and Corrosion Protection Handbook, ... Revised and Expanded, Earl Logan, Jr 86 Vibrations of Shells and Plates: Second Edition, Revised and Expanded, Werner Soedel 87 Steam Plant Calculations Manual: Second Edition, Revised and Expanded, ... Couplings and Joints: Design, Selection, and Application, Second Edition, Revised and Expanded, Jon R Mancuso 122 Thermodynamics: Processes and Applications, Earl Logan, Jr 123 Gear Noise and Vibration, ...

Ngày tải lên: 13/12/2013, 03:15

... paths (paths and 3) of noise and vibration caused by airborne excitation of walls and columns in the mechanical equipment room These paths make it impossible to achieve the low noise levels that ... Values for Sound Attenuators General Types and Applications of Vibration Isolators Vibration Isolation Mounting for Centrifugal and Axial-Flow Fans Vibration Isolation Mounting for Reciprocating ... against the noise of all the noisiest possible equipment; such overdesign would require thicker and heavier walls and floors than required by most of the equipment The noise estimates and the noise...

Ngày tải lên: 28/03/2014, 18:20

... Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and Corrosion Protection Handbook, ... Revised and Expanded, Earl Logan, Jr 86 Vibrations of Shells and Plates: Second Edition, Revised and Expanded, Werner Soedel 87 Steam Plant Calculations Manual: Second Edition, Revised and Expanded, ... Couplings and Joints: Design, Selection, and Application, Second Edition, Revised and Expanded, Jon R Mancuso 122 Thermodynamics: Processes and Applications, Earl Logan, Jr 123 Gear Noise and Vibration, ...

Ngày tải lên: 03/07/2014, 12:20

... Niemann, G and Baethge, J., 'Transmission error, tooth stiffness, and noise of parallel axis gears.' VDI-Z, Vol 2, 1970, No and No Palmer, D and Munro, R.G., 'Measurements of transmission error, vibration ... however, noise is the critical factor, "design load" may refer to the condition where noise has to be a minimum and may be only 10% of the permitted maximum load If the requirement is for minimum noise ... helix and alignment accuracies, and gear body deflections, must sum to less than a few fim As a result, we have 15 Harris Mapping for Spur Gears to allow for typically up to 100% overload and deflection...

Ngày tải lên: 03/07/2014, 12:20

... Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and Corrosion Protection Handbook, ... Revised and Expanded, Earl Logan, Jr 86 Vibrations of Shells and Plates: Second Edition, Revised and Expanded, Werner Soedel 87 Steam Plant Calculations Manual: Second Edition, Revised and Expanded, ... Couplings and Joints: Design, Selection, and Application, Second Edition, Revised and Expanded, Jon R Mancuso 122 Thermodynamics: Processes and Applications, Earl Logan, Jr 123 Gear Noise and Vibration, ...

Ngày tải lên: 05/08/2014, 09:20

... Understanding Gear Noise, J Derek Smith Chains for Power Transmission and Material Handling: Design and Applications Handbook, American Chain Association Corrosion and Corrosion Protection Handbook, ... Revised and Expanded, Earl Logan, Jr 86 Vibrations of Shells and Plates: Second Edition, Revised and Expanded, Werner Soedel 87 Steam Plant Calculations Manual: Second Edition, Revised and Expanded, ... Couplings and Joints: Design, Selection, and Application, Second Edition, Revised and Expanded, Jon R Mancuso 122 Thermodynamics: Processes and Applications, Earl Logan, Jr 123 Gear Noise and Vibration, ...

Ngày tải lên: 05/08/2014, 09:20

... GEARCASE FOOT VIBRATIONS ^ Antivibration Mounts I TRANSMITTED STRUCTURE VIBRATION Sound Radiating Panel AIRBORNE NOISE Fig 1.4 Vibration excitation and transmission path 1.6 T.E - noise relationship ... measure T.E semi-statically by using dividing heads and theodolites on input and output and indexing a degree at a time but this is extremely slow and laborious though it can be the only possible ... effectiveness of vibration isolators Of these approaches, (c) and (d) are very expensive and tend to be temperamental and delicate or impracticable so this book concentrates on (a) and (b) as the...

Ngày tải lên: 05/08/2014, 09:20

... GEARCASE FOOT VIBRATIONS ^ Antivibration Mounts I TRANSMITTED STRUCTURE VIBRATION Sound Radiating Panel AIRBORNE NOISE Fig 1.4 Vibration excitation and transmission path 1.6 T.E - noise relationship ... measure T.E semi-statically by using dividing heads and theodolites on input and output and indexing a degree at a time but this is extremely slow and laborious though it can be the only possible ... effectiveness of vibration isolators Of these approaches, (c) and (d) are very expensive and tend to be temperamental and delicate or impracticable so this book concentrates on (a) and (b) as the...

Ngày tải lên: 05/08/2014, 09:20

... Niemann, G and Baethge, J., 'Transmission error, tooth stiffness, and noise of parallel axis gears.' VDI-Z, Vol 2, 1970, No and No Palmer, D and Munro, R.G., 'Measurements of transmission error, vibration ... however, noise is the critical factor, "design load" may refer to the condition where noise has to be a minimum and may be only 10% of the permitted maximum load If the requirement is for minimum noise ... theory it is small and is dominated by axial force effects and conventional T.E effects Tip relief has a further complicating effect since all loadings near root and tip are reduced and with an older...

Ngày tải lên: 05/08/2014, 09:20

... Niemann, G and Baethge, J., 'Transmission error, tooth stiffness, and noise of parallel axis gears.' VDI-Z, Vol 2, 1970, No and No Palmer, D and Munro, R.G., 'Measurements of transmission error, vibration ... however, noise is the critical factor, "design load" may refer to the condition where noise has to be a minimum and may be only 10% of the permitted maximum load If the requirement is for minimum noise ... theory it is small and is dominated by axial force effects and conventional T.E effects Tip relief has a further complicating effect since all loadings near root and tip are reduced and with an older...

Ngày tải lên: 05/08/2014, 09:20

... account shear effects and pinion bending and can allow for variable loading along the contact line 4.7 Design options for low noise When designing standard spur gears for low T.E there are few ... are slender and allow high lateral deflections (>0.2 mm) the natural frequencies of vibration of the gears will be very low so that, although the misalignment will cause T.E and hence vibration, ... they cannot give significant vibration generation at once-per-tooth frequency and harmonics This, at first sight, seems peculiar and if, as in Fig 4.5, we plot typical random adjacent pitch errors...

Ngày tải lên: 05/08/2014, 09:20

... account shear effects and pinion bending and can allow for variable loading along the contact line 4.7 Design options for low noise When designing standard spur gears for low T.E there are few ... are slender and allow high lateral deflections (>0.2 mm) the natural frequencies of vibration of the gears will be very low so that, although the misalignment will cause T.E and hence vibration, ... they cannot give significant vibration generation at once-per-tooth frequency and harmonics This, at first sight, seems peculiar and if, as in Fig 4.5, we plot typical random adjacent pitch errors...

Ngày tải lên: 05/08/2014, 09:20

... housing vibration Housing vibration is a very simple, robust measurement using standard cheap accelerometers and it gives a good idea of the levels at the interface between the gearbox internals and ... us the original vibration generation information and the accelerometers give the casing and system response information 6.2 Practical measurements As far as noise measurements and deductions are ... References Lim, T.C., and Singh, R., 'A review of gear housing dynamics and acoustics literature.' NASA Contractor Report 185148 Oct 1989 Fahy, F.J Sound and structural vibration Academic Press,...

Ngày tải lên: 05/08/2014, 09:20

... combined internal and external resonances by measuring the bearing vibrations and the noise simultaneously This gives T.E to bearing vibration as well as bearing vibration to noise Whether the ... the vibration power going into the support via that route, again taking note of phase angles As in Fig 6.8, if the velocities of vibration above and below the isolator are Vl and V2 (complex) and ... amplitudes of the pulses (to about V) and to slow down their rate of change of voltage Standard logic TTL pulses from the sensors rise and fall V in less than 0.5 us and this sudden change gives pickup...

Ngày tải lên: 05/08/2014, 09:20

... combined internal and external resonances by measuring the bearing vibrations and the noise simultaneously This gives T.E to bearing vibration as well as bearing vibration to noise Whether the ... the vibration power going into the support via that route, again taking note of phase angles As in Fig 6.8, if the velocities of vibration above and below the isolator are Vl and V2 (complex) and ... amplitudes of the pulses (to about V) and to slow down their rate of change of voltage Standard logic TTL pulses from the sensors rise and fall V in less than 0.5 us and this sudden change gives pickup...

Ngày tải lên: 05/08/2014, 09:20

... 0.0001 g and is down below the noise level so this method is not suitable Double integration to angular displacement is also temperamental at low frequencies The usual solution as with much vibration ... distance and the mass and speed limitations of large encoders In practice, for gear noise work, accuracy is not a limitation Choice between shaft mounting and coupling drive is not clear and depends ... Gear Noise and Vibration, I Mech E., April 1990, p Heidenhain Ltd., 200 London Rd., Burgess Hill, Sussex, RH15 9RD, U.K or 115 Commerce Drive, Schaumburg, IL 60173, U.S.A Sweeney, P.J and Randall,...

Ngày tải lên: 05/08/2014, 09:20

... 0.0001 g and is down below the noise level so this method is not suitable Double integration to angular displacement is also temperamental at low frequencies The usual solution as with much vibration ... distance and the mass and speed limitations of large encoders In practice, for gear noise work, accuracy is not a limitation Choice between shaft mounting and coupling drive is not clear and depends ... Gear Noise and Vibration, I Mech E., April 1990, p Heidenhain Ltd., 200 London Rd., Burgess Hill, Sussex, RH15 9RD, U.K or 115 Commerce Drive, Schaumburg, IL 60173, U.S.A Sweeney, P.J and Randall,...

Ngày tải lên: 05/08/2014, 09:20

... York, 1992 Newland, D.E.N., Random vibrations, spectral and wavelet analysis Longman, Harlow, UK and Wiley, New York, 1993 Analysis Techniques 9.1 Types of noise and irritation One of the most ... frequency, and set the sampling rate to x fg The low cut filter is set slightly below the lowest frequency This "standard" solution tends to be applied without much thought to all problems and is ... C/2 and those below When a fundamental frequency analysis is carried out, the result gives both the components above and below the folding frequency as conjugate pairs and we arbitrarily (and...

Ngày tải lên: 05/08/2014, 09:20