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Analysis and Design of Machine Elements
book

Analysis and Design of Machine Elements

by Wei Jiang
April 2019
Intermediate to advanced content levelIntermediate to advanced
528 pages
14h 4m
English
Wiley
Content preview from Analysis and Design of Machine Elements

9 Wormgear Drives

Photos of wormgear drives.

Nomenclature

a
centre distance, mm
c
clearance, mm
d
reference diameter, mm
d a
diameter of addendum circle, mm
d f
diameter of dedendum circle, mm
E
elastic modulus, MPa
F a
axial force, N
F n
normal force, N
F r
radial force, or separating force, N
F t
tangential force, or transmitted force, N
f v
equivalent coefficient of friction
I
moment of inertia, mm4
i
speed ratio, velocity ratio
j
number of gear teeth meshing per revolution
K
load factor
K A
application factor
K v
dynamic factor
K β
face load factor
K FN
bending life factor
K HN
contact life factor
L
total contact length, mm
L h
design life in hours, h
l
span between two bearings, mm
m
module, mm
m a
axial module, mm
m n
normal module, mm
m t
transverse module, mm
N
number of cycles
n
rotational speed, rpm
P
transmitted power, kW
p a
axial pitch, mm
p t
transverse circular pitch, mm
p z
lead, mm
q
worm diameter factor, worm quotient
S
housing external surface area, m2
T
transmitted torque, N·mm
t a
ambient air temperature, °C
t o
oil operating temperature, °C
u
teeth ratio, gear ratio
v
pitch line velocity, m s−1
v s
sliding velocity, m s−1
x
profile shift coefficient
Y
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Publisher Resources

ISBN: 9781119276074Purchase book