Gear Noise and Vibration Episode 2 Part 5 pps

... pt slicew=facew/ 21 ;tanbhelx=0 .18 ;tthst = 1, 4e 10 ; % standard value relst=strelief*bpitch;tthdamp = Ie5; % eff.value at 10 000 rad/s Q = 14 ++ ss = (1: 21 );hor = ones( 1, 21) ; % 21 ... 30). 20 10 0 10 20 time in milliseconds Fig 5. 3 Prediction of contact force variation with time with helical gear. Prediction of Dynamic Effects 69 -13...

Ngày tải lên: 05/08/2014, 09:20

... 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 woul...

Ngày tải lên: 05/08/2014, 09:20

... contact. References 1. Newland, D.E.N., 'Random vibrations, spectral and wavelet analysis.' Longman, Harlow, UK and Wiley, New York, 1993. 2. Randall, R.B., 'Frequency ... 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 F...

Ngày tải lên: 05/08/2014, 09:20

... contact. References 1. Newland, D.E.N., 'Random vibrations, spectral and wavelet analysis.' Longman, Harlow, UK and Wiley, New York, 1993. 2. Randall, R.B., 'Frequency ... 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 F...

Ngày tải lên: 05/08/2014, 09:20

... (V2r2-Vlr2) + [k !2/ r2 2 ] (s2r2-slr2-te) = - F 23 [I3/r3 2 ] (A3.r3) + [D3/r3 2 ] (V3 r3) + [D34/r3 2 ] (V3r3-V4r3) + [k34/r3 2 ] (s3r3-s4r3) = - F 23 [I4/r4 2 ] (A4.r4) + [D4/r4 2 ] ... equations and take 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...

Ngày tải lên: 05/08/2014, 09:20

... (V2r2-Vlr2) + [k !2/ r2 2 ] (s2r2-slr2-te) = - F 23 [I3/r3 2 ] (A3.r3) + [D3/r3 2 ] (V3 r3) + [D34/r3 2 ] (V3r3-V4r3) + [k34/r3 2 ] (s3r3-s4r3) = - F 23 [I4/r4 2 ] (A4.r4) + [D4/r4 2 ] ... equations and take 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...

Ngày tải lên: 05/08/2014, 09:20

... 5*cos(1 .44 88 -(i-l)*0.1); yl(i) - 40 .7 84 - 5*sin(1 .44 88 -(i-l)*0.1); end fori=16:N; % involute ra = (i-16)*0. 02; xl(i) =40 .7 84* (sin(raHi-16)*0. 02* cos(ra)); yl(i) =40 .7 84* (cos(ra)+(i-16)*0. 02* sin(ra)); end for ... i=(N+l) :2* N ; % Image in x=0 other flank x2(i) = - xl (2* N+l-i); y2(i) - yl (2* N+l-i); rot 1=0 .45 413; xl(i) =x2(i)*cos(rotl) +y2(i)...

Ngày tải lên: 05/08/2014, 09:20

... 5*cos(1 .44 88 -(i-l)*0.1); yl(i) - 40 .7 84 - 5*sin(1 .44 88 -(i-l)*0.1); end fori=16:N; % involute ra = (i-16)*0. 02; xl(i) =40 .7 84* (sin(raHi-16)*0. 02* cos(ra)); yl(i) =40 .7 84* (cos(ra)+(i-16)*0. 02* sin(ra)); end for ... i=(N+l) :2* N ; % Image in x=0 other flank x2(i) = - xl (2* N+l-i); y2(i) - yl (2* N+l-i); rot 1=0 .45 413; xl(i) =x2(i)*cos(rotl) +y2(i)...

Ngày tải lên: 05/08/2014, 09:20

... alt="" Low Contact Ratio Gears 22 5 100 20 0 300 400 50 0 Fig 14 .2 Seven tooth gear meshing with rack. These highly loaded jacking gears work extremely slowly so noise is not a problem ... revolution Fig 15. 3 Line elimination and resynthesis to detect small changes. Condition Monitoring 23 9 at c c o 2 * 4> 0 U 0) Ê .*: (0 4) 0, n u -50 -100 - 150 -20 0...

Ngày tải lên: 05/08/2014, 09:20

... appeared it was often too late and a considerable number of 23 1 22 6 Chapter 14 50 100 150 20 0 25 0 Fig 14.3 Detail of contacts for seven tooth and rack. tip base pitch roll I purfe ... (brl*psil - brl*tan(phi2))/(pi*cos(phio)); r2 = (br2*psi2 - br2*tan(phi2))/(pi*cos(phio)); conratio = rl + r2; disp( f angle rl r2 contact ratio') disp([ phi2 rl...

Ngày tải lên: 05/08/2014, 09:20

... the pinion at position 2. So 8, = Fpi, + Fp 12 and 5 2 = Fp 12 + Fp 22 . As the transmission error is the sum of 81 and S 2 T.E. = F(p n +2p, 2 + p 22 ) giving F. Once F ... in Fig. 16. 3 and then add the results and the estimates of the tooth effects as discussed in section 16. 6. 16 .2 Hydraulic vibrators As electromagnetic vibrators...

Ngày tải lên: 05/08/2014, 09:20

... the pinion at position 2. So 8, = Fpi, + Fp 12 and 5 2 = Fp 12 + Fp 22 . As the transmission error is the sum of 81 and S 2 T.E. = F(p n +2p, 2 + p 22 ) giving F. Once F ... in Fig. 16. 3 and then add the results and the estimates of the tooth effects as discussed in section 16. 6. 16 .2 Hydraulic vibrators As electromagnetic vibrators...

Ngày tải lên: 05/08/2014, 09:20

... ml 500000 25 0000 130000 64000 320 00 16000 8000 4000 20 00 1000 500 25 0 130 64 32 to to to to to to to to to to to to to to to 1000000 500000 25 0000 130000 64000 320 00 16000 8000 4000 20 00 1000 500 25 0 130 64 Group 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 Bearing ... loaded gear. The particle counts are classified into groups according to ISO 4406 and the fig...

Ngày tải lên: 05/08/2014, 09:20

... the particle count over 2 urn and is not of interest for gearboxes. 26 0 Chapter 16 Fig 16. 12 Sketch of vibration responses and paths. In practice, because measuring inside the gearbox ... ml 500000 25 0000 130000 64000 320 00 16000 8000 4000 20 00 1000 500 25 0 130 64 32 to to to to to to to to to to to to to to to 1000000 500000 25 0000 130000 64000 320 00...

Ngày tải lên: 05/08/2014, 09:20