ROSTA
2.37
Oscillating Mountings
Calculation Example
Machine type: staying sifter with positive crank drive
Description
Symbol
Example
Unit
Calculation formula
Total oscillating mass (material included)
m
1600 kg
Angle of oscillation
Eccentric radius
R
25 mm
Length of support column
X
600 mm
Angle of oscillation (out of R and X)
α
+
2.4 °
Revolutions
n
s
230 min
–1
Quantity of support columns
z
4 pcs.
Load per column
Load per column
G
3924 N
Max. load capacity per column with AK 50 mounts
G
max
4480 N
Element selection:
4 columns consisting of 2 pcs. AK 50
➝
8 psc. AK 50
Hanging and freely oscillating gyratory sifter
Staying gyratory sifter with positive crank shaft drive
Installation guidelines for AK universal joints
1
Install the two AK per column in the same line, in order that the dis-
tance X between the two inner squares of the 90° “distorted” ele-
ment parts and the two inner squares of the “in-line” element parts is
identical.
2
Install the four identical connection columns (provided by the cus-
tomer) between the two AK. Also by slightly inclined screen-boxes
the distance or length X of the connection columns has to be iden-
tical – compensate the inclination with e.g. the higher positioning
of the fixation brackets by the discharge-end of the screen-box.
3
Up to the size AK 50 we do recommend to use our fixation brackets
type
WS
for the AK mounting on machine frame and screen-box –
see ROSTA general catalogue “Rubber suspensions”.
4
To avoid unwanted tilting motions or screen-box distortions (by
standstill) we do recommend the installation of the upper AK-brack-
ets on the level of the center of gravity “S” of the screen-box.
1
1
3
X
4
2
2
4
α
= arctan
R
X
G =
[N]
m · g
z
[°]