416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas...
-
Upload
darlene-oliver -
Category
Documents
-
view
272 -
download
0
Transcript of 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas...
![Page 1: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/1.jpg)
1
書名: Essentials of Mechanical Engineering Design, 1/E作者: Shigey Mischke Budynas書號:MX0398
![Page 2: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/2.jpg)
2
![Page 3: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/3.jpg)
3
![Page 4: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/4.jpg)
4
![Page 5: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/5.jpg)
5
8-2 Bearing lifeCommon life measure:
• Number of revolutions of the inner ring (outer ring stationary) until the first tangible evidence of fatigue
• Number of hours of use at a standard angular speed until the first tangible evidence of fatigue
Rate life (90%)-minimum life, L10 life and B10 lifeMedian life is the 50% (or average life)
![Page 6: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/6.jpg)
6
![Page 7: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/7.jpg)
7
In above equation:
a=3 for ball bearing
a=1/3 for roller bearing
a
DDDa
RR nLFnLC /1/110 )60()60(
Catalog rating lb or kN
Rating life in hours
Rating speedrpm
Desired life
![Page 8: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/8.jpg)
8
![Page 9: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/9.jpg)
9
Reliability set x=L/L10 by Weibul distribution Minimum
value of the variate
Characteristic parameter
corresponding to the 63.2121
percentile value of the variate
![Page 10: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/10.jpg)
10
![Page 11: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/11.jpg)
11
Along a constant reliability contour (BD)
Along load line (AB)
But FB=C10
B 0
0
1/0 0
1/
1/0 0
exp
1( )(ln )
( )1
( )(ln )
b
D
bB
D
aD DB D D
bR
D
x xR
x
x x xR
x xF F F
x x xR
![Page 12: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/12.jpg)
12
![Page 13: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/13.jpg)
13
Equivalent load
Axial load
Radial load
V=1 when inner ring rotate
V=1.2 when outer ring rotate
V=1 for self aligning bearing
Common expression
![Page 14: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/14.jpg)
14
C0 : basic static load rating
![Page 15: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/15.jpg)
15
![Page 16: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/16.jpg)
16
![Page 17: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/17.jpg)
17
![Page 18: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/18.jpg)
18
![Page 19: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/19.jpg)
19
![Page 20: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/20.jpg)
20
![Page 21: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/21.jpg)
21
K
![Page 22: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/22.jpg)
22
Damage done by equivalent loads Fe1,Fe2 and Fe3 is
In general form
Eq. 8-10 can be written as
→
→
![Page 23: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/23.jpg)
23
![Page 24: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/24.jpg)
24
33
22
11
332211
332211
332211
equals alsoK and
and
lL
Kl
L
Kl
L
KLFlFlFK
LFLFLFK
lFlFlFLF
ae
ae
ae
ae
ae
ae
ae
ae
aeeq
aeq
For continue load
0dFdDD
dFdD
a
a
![Page 25: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/25.jpg)
25
![Page 26: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/26.jpg)
26
![Page 27: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/27.jpg)
27
![Page 28: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/28.jpg)
28
![Page 29: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/29.jpg)
29
![Page 30: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/30.jpg)
30
![Page 31: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/31.jpg)
31cot389.0Kαis the half the include cup angle
![Page 32: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/32.jpg)
32
Location of reactions
![Page 33: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/33.jpg)
33
Relating load, life and reliability
Solve for xD gives
xD=L/L10
For Weibull model: x0=0, θ=4.48,b=3/2
For roller bearing:
a
D
bDD F
CRxxx )()1)(( 10/1
00
210/3103/2 )()1(48.4D
DD F
CRx
![Page 34: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/34.jpg)
34
![Page 35: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/35.jpg)
35
![Page 36: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/36.jpg)
36
Timken:
![Page 37: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/37.jpg)
37
![Page 38: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/38.jpg)
38
![Page 39: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/39.jpg)
39
![Page 40: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/40.jpg)
40
![Page 41: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/41.jpg)
41
![Page 42: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/42.jpg)
42
![Page 43: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/43.jpg)
43
![Page 44: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/44.jpg)
44
![Page 45: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/45.jpg)
45
Outline of design assessment:
1. Bearing reliability for the load imposed and life expected
2. Shouldering on shaft and housing satisfactory
3. Journal finish, diameter and tolerance compatible.
4. Lubricant type according to manufacturer’s recommendations; lubricant paths and volum supplied to keep operating temperature satisfactory
5. Preloads, if required, are supplied
![Page 46: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/46.jpg)
46
Bearing Reliability
For x0=0, θ=4.48, b=3/2
![Page 47: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/47.jpg)
47
![Page 48: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/48.jpg)
48
![Page 49: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/49.jpg)
49
![Page 50: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/50.jpg)
50
![Page 51: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/51.jpg)
51
![Page 52: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/52.jpg)
52
8-11 Lubrication
Elastohydrodynamic lubrication
Purpose of the antifriction-bearing lubricant:
1. To provide a file of lubricant between the sliding and rolling surfaces.
2. To help distribute and dissipate heat.
3. To prevent corrosion of the bearing surfaces.
4. To protect the parts from the entrance of foreign matter.
![Page 53: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/53.jpg)
53
![Page 54: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/54.jpg)
54
![Page 55: 416 書名: Essentials of Mechanical Engineering Design, 1/E 作者: Shigey Mischke Budynas 書號: MX0398.](https://reader033.fdocuments.us/reader033/viewer/2022061509/56649eef5503460f94bfebe5/html5/thumbnails/55.jpg)
55
Preloading
Alignment
Enclosures