Emc2
Guest
hi forums I have a problem with the calculation module of roller chains in fact I tried to dimensional a roller chain in the calculation part I have the value (which really does not need because normally you use the percentage extension) thl "provided useful duration due to the fatigue of the connection plate due to the fatigue of the connecting plates that gives me in all cases analyzed a duration of only 171 hours! 
these are the parameters set
chain 32a-1-90
engine 35kw
speed 41.3 rpm
chain : %1%
designation chain size 32a-116
step p 50,800 mm
number of chain links x 116,000 on
number of chains flanked k 1,000 on
minimum width between internal plates b1 31,550 mm
maximum roller diameter of 28,580 mm
maximum body diameter d2 14,290 mm
maximum internal plate depth h2 48,260 mm
maximum depth external or intermediate plate h3 41,680 mm
max width on bearing pins b 65,500 mm
max width internal plate t1 6,400 mm
max width external or intermediate plate t2 6,400 mm
chain bearing area 642,000 mm^2
tensile strength was 223000,000 n
specific chain mass m 9,700 kg/m
Chain construction factor φ 1,000 on
property toothed wheel 1: toothed wheel
property toothed wheel 2: toothed wheel
operating conditions
power p 32,000 kw
moment t 7398,971 n m
speed n 41,300 gam
efficiency 0,980 on
service life required lh 15000,000 h
δlmax 0.030 max elongation on
uniform operation application
power correction factors
shock factor y 1,000 on
service factor f1 1,000 on
toothed wheel size factor f2 1,000 on
chain factor flanked f3 1,000 on
lubrication factor f4 1,000 on
factor inter alia f5 1,000 on
ratio factor f6 1,000 on
useful life factor f7 1,000 on
the results of the calculation relative to only 2 pinions in the real case I have 12 of which only one with the grip of strength the others are all mad.speed chain v 0,876 mas
actual extraction fp 36509,328 n
centrifugal force fc 7,452 n
maximum voltage in the chain radius ftmax 36516,780 n
static safety factor ssmin 6,107 on > 7,000 on
dynamic safety factor
pressure bearing pb < p0 * λ 56,880 mpa
power project pd < pr 32,000 kw
chain power value pr 20,034 kw
> lh 35791 h :bekle:useful life of the link plates of the chain thl > lh 171 h:mixed:service life roller and bushing th > lh 866013 h
where:
comparing the calculation of inventor with a relative chains of a known brand from the diagram in my possession turns out that the excess of 3% elongation is obtained at 15,000 h while inventor calculates 35791!!
having entered all correction factors to 1. but what leaves me perplexed and the value of thl!
greetings roberto
these are the parameters set
chain 32a-1-90
engine 35kw
speed 41.3 rpm
chain : %1%
designation chain size 32a-116
step p 50,800 mm
number of chain links x 116,000 on
number of chains flanked k 1,000 on
minimum width between internal plates b1 31,550 mm
maximum roller diameter of 28,580 mm
maximum body diameter d2 14,290 mm
maximum internal plate depth h2 48,260 mm
maximum depth external or intermediate plate h3 41,680 mm
max width on bearing pins b 65,500 mm
max width internal plate t1 6,400 mm
max width external or intermediate plate t2 6,400 mm
chain bearing area 642,000 mm^2
tensile strength was 223000,000 n
specific chain mass m 9,700 kg/m
Chain construction factor φ 1,000 on
property toothed wheel 1: toothed wheel
property toothed wheel 2: toothed wheel
operating conditions
power p 32,000 kw
moment t 7398,971 n m
speed n 41,300 gam
efficiency 0,980 on
service life required lh 15000,000 h
δlmax 0.030 max elongation on
uniform operation application
power correction factors
shock factor y 1,000 on
service factor f1 1,000 on
toothed wheel size factor f2 1,000 on
chain factor flanked f3 1,000 on
lubrication factor f4 1,000 on
factor inter alia f5 1,000 on
ratio factor f6 1,000 on
useful life factor f7 1,000 on
the results of the calculation relative to only 2 pinions in the real case I have 12 of which only one with the grip of strength the others are all mad.speed chain v 0,876 mas
actual extraction fp 36509,328 n
centrifugal force fc 7,452 n
maximum voltage in the chain radius ftmax 36516,780 n
static safety factor ssmin 6,107 on > 7,000 on
dynamic safety factor
pressure bearing pb < p0 * λ 56,880 mpa
power project pd < pr 32,000 kw
chain power value pr 20,034 kw
> lh 35791 h :bekle:useful life of the link plates of the chain thl > lh 171 h:mixed:service life roller and bushing th > lh 866013 h
where:
comparing the calculation of inventor with a relative chains of a known brand from the diagram in my possession turns out that the excess of 3% elongation is obtained at 15,000 h while inventor calculates 35791!!
having entered all correction factors to 1. but what leaves me perplexed and the value of thl!
greetings roberto