Gear Noise and Vibration Episode 2 Part 1 ppsx

... Fig. 9. 12 ) with 19 :29 at input and 23 : 31 at output. For a complete meshing cycle the layshaft would have to do 19 x 31 revs and 589 revs would take rather a long time and require ... of waveform. Analysis Techniques 14 9 1 0.8 0.6 0.4 0 .2 0 -0 .2 -0.4 -0.6 -0.8 -1 6 8 window length L 10 12 Fig 9.7 Finite length records showing end effects....

Ngày tải lên: 05/08/2014, 09:20

... result is a small amplitude random "white noise& quot; vibration. Analysis Techniques 14 9 1 0.8 0.6 0.4 0 .2 0 -0 .2 -0.4 -0.6 -0.8 -1 6 8 window length L 10 12 Fig 9.7 Finite length records ... Fig. 9. 12 ) with 19 :29 at input and 23 : 31 at output. For a complete meshing cycle the layshaft would have to do 19 x 31 revs and 589 revs would...

Ngày tải lên: 05/08/2014, 09:20

... as 2 jim rms the expected value of a low harmonic will be as high as 2V (2/ 32) which is 0.5 urn rms or 1. 4 um p-p. 2. 5 V -1. 5 10 20 30 40 50 harmonics of 1/ rev 60 70 Fig 9 .20 ... of contact. References 1. Newland, D.E.N., 'Random vibrations, spectral and wavelet analysis.' Longman, Harlow, UK and Wiley, New York, 19 93. 2. Randall...

Ngày tải lên: 05/08/2014, 09:20

... as 2 jim rms the expected value of a low harmonic will be as high as 2V (2/ 32) which is 0.5 urn rms or 1. 4 um p-p. 2. 5 V -1. 5 10 20 30 40 50 harmonics of 1/ rev 60 70 Fig 9 .20 ... of contact. References 1. Newland, D.E.N., 'Random vibrations, spectral and wavelet analysis.' Longman, Harlow, UK and Wiley, New York, 19 93. 2. Randall...

Ngày tải lên: 05/08/2014, 09:20

... rl=r2 [Il/r2 2 ] (Al.r2) + [Dl/r2 2 ] (VI r2) + [D 12 / r2 2 ] (Vlr2-V2r2) + [k !2/ r2 2 ] (slr2-s2r2+te) - Q/r2 [I2/r2 2 ] (A2.r2) + [D2/r2 2 ] (V2 r2) + [D 12 / r2 2 ] (V2r2-Vlr2) ... -k !2 (sl-s2 +te !2) - D 12 (V1-V2) rearranges to 11 Al + Dl VI + k !2 (sl-s2+te !2) + D 12 (V1-V2) = Q and similarly 12 A2 + D2 V2 - k !2 (sl-s2+te !...

Ngày tải lên: 05/08/2014, 09:20

... rl=r2 [Il/r2 2 ] (Al.r2) + [Dl/r2 2 ] (VI r2) + [D 12 / r2 2 ] (Vlr2-V2r2) + [k !2/ r2 2 ] (slr2-s2r2+te) - Q/r2 [I2/r2 2 ] (A2.r2) + [D2/r2 2 ] (V2 r2) + [D 12 / r2 2 ] (V2r2-Vlr2) ... -k !2 (sl-s2 +te !2) - D 12 (V1-V2) rearranges to 11 Al + Dl VI + k !2 (sl-s2+te !2) + D 12 (V1-V2) = Q and similarly 12 A2 + D2 V2 - k !2 (sl-s2+te !...

Ngày tải lên: 05/08/2014, 09:20

... tip relief and deflections for contact ratio of 2. 21 2 Chapter 12 50 10 0 15 0 20 0 25 0 degrees rev of carrier 300 350 400 Fig 12 . 8 Vibration observed at a stationary accelerometer. There ... there is a 20 8 Chapter 12 end for th = 1: 8; % rotate for other 8 teeth xl((th *2* N +l):(th+l) *2* N) = xl(l :2* N)*cos(0.69 813 *th)+yl(l :2* N)*sin(0....

Ngày tải lên: 05/08/2014, 09:20

... there are 12 and two-thirds cycles of 20 0 Chapter 11 Reference 1. Romax Ltd., 67 Newgate, Newark NG24 1HD. www.romaxtech.com Planetary and Split Drives 21 1 (see section 9 .10 ). All ... there is a 20 8 Chapter 12 end for th = 1: 8; % rotate for other 8 teeth xl((th *2* N +l):(th+l) *2* N) = xl(l :2* N)*cos(0.69 813 *th)+yl(l :2* N)*sin(0.69 813...

Ngày tải lên: 05/08/2014, 09:20

... class="bi x0 y0 w1 h9" alt="" Low Contact Ratio Gears 22 5 10 0 20 0 300 400 500 Fig 14 .2 Seven tooth gear meshing with rack. These highly loaded jacking gears work extremely slowly so noise is not ... noise. 22 8 Chapter 14 1. 08: 1. 06 1. 04 1. 02 tangent from -0 .1 position base circle 0.98 L •- < 1 -— — - — -0. 12 -0 .1 -0.08 -0.06 -0.04 -0. 02...

Ngày tải lên: 05/08/2014, 09:20

... revolution Fig 15 .3 Line elimination and resynthesis to detect small changes. 22 8 Chapter 14 1. 08: 1. 06 1. 04 1. 02 tangent from -0 .1 position base circle 0.98 L •- < 1 -— — - — -0. 12 ... appeared it was often too late and a considerable number of 23 1 22 6 Chapter 14 50 10 0 15 0 20 0 25 0 Fig 14 .3 Detail of contacts for sev...

Ngày tải lên: 05/08/2014, 09:20