Embodiment design of a driving unit

4th Exercise Engineering Design
Group 3 : Nguyen Quang Thanh ID: 1558
Truong Thi Xuan Dao ID: 1538
Nguyen Thi Hong Nhung ID: 1533
Lecturer: Prof. Dr.-Ing. Michael Schmidt-Kretschmer
23 Mar 2014
Embodiment Design of a
Driving Unit

Table of content
Part 1: Layout calculation
Part 2: Select the machine element
Part 3: Assembly drawing

Part 1: Layout calculation
Part 2: Select the machine element
Part 3: Assembly drawing

Layout calculation for shaft SE2
Data Power P2= 10 kW Speed n2= 750
Permissible torsion
stress = 45 N/mm2
Determinati
on of the
torsion
moments
Minimum
diameter of
shaft SE2
(mm)
)(3.127
750
10
9550
(
)(
9550
)(.
)(.30
)1min1min2
2
2
2
2 Nmx
n
kWP
x
n
WP
Tt 

)(3.24
4514.3
10003.12716
.
.16 33
2
2
mm
x
xxT
d
perm
t



Layout calculation for shaft SE2
Data
Numbers of tooth
for gear1 z1 = 19
Numbers of tooth
for gear2 z2 = 61
Assumed that the
efficiency of
power
transmission is
90%, then the
power to SE1
P1 = 90 P2 = 0.9 x 10 = 9 (kW)
Gear ratio
The rotation
speed of shaft SE1
Determination of
the torsion
moments
Minimum diameter
of shaft SE1 (mm)
19
61
1
2
12 
z
z
n
19
61
x750=n×n=n 21 12
)(7.35
60750
199
9550
(
)(
9550
)(.
)(.30
)1min1min 1
1
1
1
1 Nm
x
x
x
n
kWP
x
n
WP
Tt 

)(9.15
4514.3
10007.3516
.
.16 33
1
1
mm
x
xxT
d
perm
t



Select the machine element for SE1 (1/5)
Bearing
Principal
Dimensions (mm)
Basic load (kN)
Speed ratings
(r/min)
Designation
d D B
Dynamic
(C0)
Static
(C)
Ref
speed
Limiting
speed
SKF Explorer
bearing
30 62 17.25 40.2 44 8,500 11,000 30,206 J2/Q
http://www.skf.com/ca/en/products/bearings-units-housings/
roller-bearings/tapered-roller-bearings/single-row-tapered-roller-bearings

Lip seal
Shaft Diameter
A (mm)
Housing
Diameter B(mm)
Housing Depth C
(mm)
JW part
Non
JW order
code
25 47 10 57-25 WG-030255
http://www.jameswalker.biz/product_range/68-Walkersele-radial-lip-
seals-general-range

Slotted
nut Article ID Material
Number
of slots
T
(mm)
h(h14)
(mm)
BEN
d2(h11)
(mm)
P
(mm)
D
Left 11572160150 Steel 4 2 7 5 32 1.5 M16
Right 11572260150 Steel 4 3 10 7 45 1.5 M26
http://www.fabory.us/en/product.html

Lock
washer Type
Weight Dimensions (mm)
Nut
[kg] d D D2 E F s B
Left MB 4 3,50 20 36 26 4 18,5 1,0 4 KM 4
Right MB 6 7,80 30 49 38 5 27,5 1,25 5 KM 6
http://www.marylandmetrics.com/pt1/mbwashr3.htm

Nominal
diameter
of shaft (d)
Key way Key dimension
Width
(b)
Shaft t1 Hub t2
Width (b) x
thick (h)
Chamfer S
Length
Min Max
22 8 4 3.3 8 x 7 0.25 0.4 18
http://www.roymech.co.uk/Useful_Tables/Keyways/keyways.htm

Bearing
Principal
Dimensions (mm)
Basic load (kN)
Speed ratings
(r/min)
Designation
d D B
Dynamic
(C0)
Static
(C)
Ref
speed
Limiting
speed
SKF Explorer
bearing
40 62 12 13.8 10 24,000 12,000 61908-2RZ
http://www.skf.com/group/products/bearings-units-housings/ball-bearings/
deep-groove-ball-bearings/single-row/

Slotted
nut
Article ID Material
Number
of slots
T
(mm)
h(h14)
(mm)
BEN
d2(h11)
(mm)
P
(mm)
D
11572500150 Steel 6 3.5 13 8 75 1.5 M50
http://www.fabory.us/en/product.html

Lock
washer
Type
Weight Dimensions (mm)
Nut
[kg] d D D2 E F s B
MB 11 19,60 55 81 67 8 52,5 1,25 7 KM 11
http://www.marylandmetrics.com/pt1/mbwashr3.htm

Nominal
diameter
of shaft (d)
Key way (mm) Key dimension (mm)
Width
(b)
Shaft t1 Hub t2
Width (b)
x thick
(h)
Chamfer S Length
(mm)
Min Max
30 10 5 3.3 10 x 8 0.4 0.6 22
50 16 6 4.3 16 x 10 0.4 0.6 45
http://www.roymech.co.uk/Useful_Tables/Keyways/keyways.htm

Embodiment design of a driving unit

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Embodiment design of a driving unit