%%HP: T(1)A(D)F(,);
DIR
  tamb
    
"TAMBOR DE FREIO

Nm=PV/75*60*n

WdisWgerado kcal/h

Calor Gerado

Wg=Qm*hm*z*n*A

Qm carga mdia kg
hm altura media m
z ciclos/hora
n rendimento
A equivalente mecanico do calor 1/427

Calor dissipado por radiaao

W1=(s1c1+s2c2)[((273+t1)/100)^4-((273+ta)/100)^4]

s1 superficie polida de frenagem menos a coberta pelas sapatas m
c1 coeficiente de radiacao ferro polido=1,3
s2 superficies laterais m
c2 coeficiente de radiaao ferro oxidado=4,3
t1 temperatura maxima admissivel c
ta temperatura ambiente c

calor dissipado conveccao natural freio parado

W2=*s3(t1-ta)(1-k)

 coeficiente de dissipacao por conveccao natural=5kcal/m
s3 superficie total do tambor menos a ocupada pelas sapatas m
k fator de marcha
k=tempos em movimento/tempos em movimento+tempo repouso

calor dissipado conveccao forcada freio movimento

W3=6,14*k(t1+ta)(s0*V0^0,78+2,76*n^0,78 *D^2,78)

s0 superficie do aro interna e externa m
V0 velocidade perifrica do tambor (m/seg) =dn/60
n rotacao do tambor (RPS)
D  tambor (m)
"
TXT
    
  PWR
    
"M=N*9,55/n
N WATT  n RPM  M Nm

M=N*716,2/n
N CV  n RPM  M kgf

N=F*V
N=PV/75*60*n

1HP=745,7W"
TXT
    
  POL
     FIG4 PICT STO
PICTURE
    
  FREI3
     FIG3 PICT STO
PICTURE
    
  FREI2
     FIG2 PICT STO
PICTURE
    
  FREIO
     FIG1 PICT STO
PICTURE
    
  FIG1
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  FIG3
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  FIG2
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  FIG4
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END
