Transcript
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
Determination of the torsion moments
Minimum diameter of shaft SE2 (mm)
)(3.127750
109550
(
)(9550
)(.
)(.30
)1min1min2
2
2
2
2 Nmxn
kWPx
n
WPTt
)(3.244514.3
10003.12716
.
.1633
2
2
mmx
xxTd
perm
t
Layout calculation for shaft SE2
DataNumbers of tooth for gear1 z1 = 19
Numbers of toothfor 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
zn
19
61 x 750=n×n =n 21 12
)(7.3560750
1999550
(
)(9550
)(.
)(.30
)1min1min 1
1
1
1
1 Nmx
xx
n
kWPx
n
WPTt
)(9.154514.3
10007.3516
.
.1633
1
1
mmx
xxTd
perm
t
Part 1: Layout calculation
Part 2: Select the machine element
Part 3: Assembly drawing
Select the machine element for SE1 (1/5)
Bearing
Principal Dimensions (mm)
Basic load (kN)Speed ratings
(r/min)Designation
d D BDynamic
(C0)Static
(C)Ref
speedLimiting 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
Select the machine element for SE1 (2/5)
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
Select the machine element for SE1 (3/5)
Slotted nut Article ID Material
Number of slots
T(mm)
h(h14)(mm)
BENd2(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
Select the machine element for SE1 (4/5)
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
Select the machine element for SE1 (5/5)
Nominal diameter of
shaft (d)
Key way Key dimension
Width (b)
Shaft t1 Hub t2Width (b) x
thick (h)
Chamfer S
LengthMin Max
22 8 4 3.3 8 x 7 0.25 0.4 18
http://www.roymech.co.uk/Useful_Tables/Keyways/keyways.htm
Select the machine element for SE2 (1/4)
Bearing
Principal Dimensions (mm)
Basic load (kN)Speed ratings
(r/min)Designation
d D BDynamic
(C0)Static
(C)Ref
speedLimiting 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/
Select the machine element for SE2 (2/4)
Slotted nut
Article ID MaterialNumber of slots
T(mm)
h(h14)(mm)
BENd2(h11)
(mm)P
(mm) D
11572500150 Steel 6 3.5 13 8 75 1.5 M50
http://www.fabory.us/en/product.html
Select the machine element for SE2 (3/4)
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
Select the machine element for SE2 (4/4)
Nominal diameter
of shaft (d)
Key way (mm) Key dimension (mm)
Width (b)
Shaft t1 Hub t2Width (b)
x thick (h)
Chamfer SLength(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
Part 1: Layout calculation
Part 2: Select the machine element
Part 3: Assembly drawing
Front-view
Front-view – SE1
Front-view – SE1
Thank!
top related