Page 183 - Analysis and Design of Machine Elements

Table 7.1 Lubrication methods [1, 5]. Chain Drives 161
Lubrication
methods Figures Description
−1
Manual For chain velocity between 0.86 and 3.3 m s ;
Oil is supplied by a brush or an oil can regularly.

−1
Drip For chain velocity between 0.86 and 3.3 m s ;
Oil is fed directly onto the link plates of each
chain strand by drip cup.

−1
Oil bath For chain velocity between 3.3 and 7.6 m s ;
The lower strand of chain runs through a sump
of oil in the chain housing.

−1
Oil disc For chain velocity between 3.3 and 7.6 m s ;

An oil disc attached to the shaft picks up
lubricant from the sump and throws it on to the
chain.

−1
Oil stream For chain velocity greater than 7.6 m s ;
An oil pump sprays a continuous stream of oil
on the inside of chain loop at the slack side,
evenly across the chain width.

where
F – effective peripheral force, N;
e
K Q – factor, for horizontal transmission, select K = 1.15; for vertical transmission
Q
select K = 1.05.
Q
7.4.5 Design Cases

Example Problem 7.1
Design a chain drive for a heavily loaded conveyor to be driven by a gasoline engine
with a mechanical drive. The input speed is 900 rpm and the desired output speed is