belt drives

Question 1

V belts transmit power by a ___ action between the belt and the sheve and ___ in the belt?

Answer 1

wedging action
tension in the belt

Question 2

The advantages of v-belts.?

Answer 2

cost effective
no lubrication
slip on overload
they require 120 deg arc of contact

Question 3

limitations of v belts ?

Answer 3

120 deg of arc contact
unsuitable for high temp
not practice for high surface speeds

Question 4

what are tensile members and compression material and the cover?

Answer 4

tensile members consists of cords that cary the load

compression material transmits power between the sheave
cover protects the internal parts

Question 5

the pitch line or tensile section of the belt is located near the ?

Answer 5

outside diameter of the sheave

Question 6

what is creep?

Answer 6

the loss of driving speed due to the lengthening and shortening of the belt as it cycles from the slack side to tight side

Question 6

the amount of power that a belt can transmit depends on?

Answer 6

the strength of the tensile members

-the grip on the pulley
-arc of contact

-the tension applied to the belt.

-coefficient of friction between belt and pulley

Question 7

The gripping action on a Vbelt, depends on the wedging action of the belt, and sheave if the belt rides in the bottom of the sheave you will have less?

Answer 7

wedging and more slippage

Question 8

what is friction?

Answer 8

the grip of the belt and pulley

Question 9

the coefficient of friction depends on ?

Answer 9

the nature of surfaces in contact

Question 10

the arc of contact is the ?

Answer 10

number of of degrees that a belt wraps around a pulley

greater the arc for surface to grip