Chapitre 12 Flashcards

1
Q

Les types de traction

A
TRACTION DROITE 
Mouflage simple ( <4 ):  n=R/E
Mouflage composé( >5 ):  n=R/E -2
TRACTION RENVERSÉE
Mouflage simple ( <2 ):  n=R/E +1
Mouflage composé( >3 ):  n=R/E -1

AUTO TRACTION
n=R/E +1

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2
Q

Calcul effort totat

A

E total= E× p

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3
Q

Calcul % secu >15%

A

S= E total - R x 100/ R

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4
Q

Calcul effort reel

A

E reel= R/p

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5
Q

Calcul effort resistant:R

A

R= Poids (newton) x roule ou glissé

+/- Poids (newton) x pente

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6
Q

Effort à la jante

A

Ej= rendement × Puissance moteur/vitesse

Puissance moteur= 1 cheval = 736 chevaux
vitesse = m/seconde

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7
Q

Adhérence tracteur

A

A= Poids × coefficient adhérence

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8
Q

Effort au crochet

A

Ec= (Ej ou A )- R tracteur

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