Page 13 - BPW axles with air suspension Series O SL AL

Tri-axle unit: Turning when stationary 3.6

The side forces are transmitted by the outer axles.
The central axle turns on its own axis and does
not transmit side forces.

1 st or 3 rd axle of rigid tri-axle suspension unit

F StX F sch
F StY F StY
F Q = F x µ Q
A
F StX L1 F F Q x L1
F sch
Q
F
=
StX
FM
F
F StY = Q
2
FM

F sch = Resulting force (N)
F Q = Side force on the axle (N)
µ = Adhesion coefficient when turning
F Q Q
From tests: µQ = 1.6

Example HSFALM 9010 30 K:

FM = 1300 mm
L1 = 500 m
F A = 9000 x 9.81 = 88290 N
µ Q = 1.6
F Q = 88290 x 1.6 = 141260 N

141260 x 500
F StX = = 54331 N
1300
141260
F StY = = 70630 N
2

BPW-EA-Luft 1023701e 13