Drive Shafts
 

DANA Industrial Drive Shafts Catalogue

Technical directions for application
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Operating angles
The most common arrangements are the Z- and W-deflections. To begin with, we will consider the system in which the shafts to be connected are in the same plane.

Z-arrangement

W-arrangement



Maximum permissible angle difference
The condition = is one of the essential requiremants tor a uniform output speed condition and cannot always be fulfilled. Therefore designers and engineers will often ask tor the permissihle difference between the deflection angles of both joints.

The deflection angles for high-torque and high-speed machine drives should be equal. If not, the difference should be limited 1° - 1,5°.

Greater differences about 3° to 5° are acceptable without disadvantages in low speed applications. For applications with varying deflection conditions it is important to obtain uniformity, if possible over the complete deflection range.

Deflection in two planes means that the deflection is both horizontal and vertical. The combination of two identical types of deflection (Z/Z or W/W) and identical deflection angles ensure uniformity. For combination of Z- and W deflection the inner yokes must be offset. Please consult DANA's application engineers to determine the proper amount of angular offsct.


Determination of the maximum permissible operating deflection angle β
Depending on the cardan shaft series the maximum deflection angle per jomt is
β = 5° - 44°. Due to the kinematic conditions of the cardan joint as described before, the deflection angle must be limited in relation to the speed.

Calculations and observations of many applications have shown that certain mass acceleration torques of the centre part must not be exceeded in order to guarantee smooth running of the drive systems. This acceleration torque depends on the

Product of speed and deflection angle
= n * β


and the moment of inertia of the middle part of the shaft.

The maximum permissible deflection angle at a given speed and an average cardan shaft length can be determined from:

D = n * β n = Operating speed [rpm]
β = Deflection angle of joint [°]



For excat determination please contact us.

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