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參數(shù)資料
| 型號： | 136P35.4848.FAR |
| 英文描述： | UNIVERSAL JOINT |
| 中文描述： | 萬向節(jié) |
| 文件頁數(shù)： | 4/16頁 |
| 文件大小： | 260K |
| 代理商： | 136P35.4848.FAR |
0.84
0.75
0.63
Correction Factors
Working
Angle
10°
0.10
type HS, plain bearings – 1500 rpm max
selecting joint size
The correct joint size for a given application can be determined after
establishing the following criteria:
Torque or power to be transmitted
Speed of rotation
Maximum working angle
Fluctuations in load or prime mover output
using the nomogram
The nomogram is expressed Nm and is valid for the continuous
transmission of a constant or near constant load where the product of
speed (rpm)
× working angle exceeds 300. The curves are valid for
working angles up to 5°. Where use is intermittent, the stated values for
transmissible torque can be increased by 20% or conversely, the
calculated values in the following examples could be reduced by 16%.
In marginal cases, this would allow the selection of a smaller joint.
In addition to torque and speed of rotation, the working angle of the
joint has a bearing on its selection. The larger the working angle, the
higher the ‘effective’ load through the joint.
The factors tabled below will make the necessary correction as shown
in the following examples.
If converting from other units:
1 kW
= 1.341 HP
1 lbf ft = 1.356 Nm
Example 1
Transmitted torque
50lbf ft or (68 Nm)
Speed of rotation
500 rpm
Working angle
20°
Correction factor (from table)
0.75
∴ corrected torque = 68
=
91 Nm
0.75
Select the joint with the performance curve at or immediately above the
point of intersection of the horizontal corresponding to 91 Nm and the
vertical corresponding to 500 rpm, i.e. Joint Size 40. Note that the
length of the joint has no bearing on this calculation.
Example 2
Power rating
3.5 HP or (2.6 kW)
Speed of rotation
400 rpm
Working angle
30°
Correction factor (from table)
0.45
∴ corrected torque = 3.5
=
7.8 HP or (5.8 kW)
0.45
The power rating (HP or kW) must first be resolved to torque x rpm in
order to address the nomogram.
i.e. torque (Nm)
=
712
× HP or 9550 × kW
rpm
=
712
× 7.8
400
=
139 Nm
Select the joint with the performance curve at or immediately above the
point of intersection of the horizontal corresponding to 139 Nm and the
vertical corresponding to 400 rpm, i.e. Joint Size 50. Once again, the
length of the joint has no bearing on this calculation.
Correction
Factor
0.92
0.45
0.30
15°
20°
25°
30°
35°
40°
()
Low Speed/Low Working Angle
If the product of speed (rpm)
× working angle is less than 300 the
following method will determine an appropriate joint size.
1. Establish the torque in Nm
2. Determine the maximum working angle of the joint
3. Substitute these values in the corresponding formula:
For intermittent use
500
× torque
(100 – working angle)
For continuous use
600
× torque
(100 – working angle)
4. Select a joint with a static break torque in excess of the figure
obtained.
Example 3
Transmitted torque
50 Nm
Speed of rotation
Manual (intermittent)
Max. Working angle
25°
∴ torque rating
=
500
× 50
(100 – 25)
=
25000
75
=
333 Nm
Type HS joint size 32 (static torque 380 Nm) or type HE joint size 40
(static torque 650 Nm) should be selected.
500
400
300
200
100
SIZE 13
SIZE 16
SIZE 20
SIZE 25
SIZE 32
SIZE 40
SIZE 50
SIZE 63
90
80
70
60
50
40
30
20
10
9
8
7
6
4
2
5
3
1
100
200
300
400
600
800
1000
2000
RPM
T
o
rque
(Nm)
PERFORMANCE DATA (H SERIES)
(Please note that the nomograms do not apply to joints
assembled as telescopic drive shafts)
16
Tel: +44 (0)1992 509888
2
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