Calculation Example Radial Sealing - TR-Electronic LMRS_27 Interface-Box SSI Gesamt-Bedienungsanleitung

Installation in hydraulic cylinders

5.4.2 Calculation example radial sealing

Sensor type with thread M18x1.5,
radial sealing via O-ring 15.4 x 2.1 (No scope of supply!)
LA-41 / LA-46 / LMRI-46 / LMR-70
A) Required locking force, dependent on the pressure on the flange
1
2
3
B) Required mounting prestressing force, dependent on mounting case
4
5
6
C) Thread geometry and thread friction
7
8
9
10
11
12
13
D) Required torque for p = 600 bar
14
(I) see "Maschinenelemente" (Machine elements), Roloff/Matek, table A8-11
(II) see "Maschinenelemente" (Machine elements), Roloff/Matek, table A8-9
(III) see "Maschinenelemente" (Machine elements), Roloff/Matek, table A8-12a
(IV) see "Maschinenelemente" (Machine elements), Roloff/Matek, equation 8.20
2
"oiled easily"
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Page 50 of 51
p = 600,0 bar
d_Oring = 15,4 mm
F_Kl = 11 175,9 N
ka = 1,6 [-]
kl = 1,2 [-]
F_VM = 21 457,7 N
D = 18,0 mm
P = 1,5 [-]
D2 = 17,03 mm
phi = 0,028 rad
my_k = 0,12 [-]
phi_G= 0,119 rad
ra = 7,7 mm
MA = 47 Nm
TR-ELA-BA-DGB-0004 v16
static hydraulic pressure at the sensor flange

O-ring- , mounting surface
required locking force (related to hydraulic pressure)
Attraction factor for tightening with torque wrench
Loosening factor for static load
Mounting-prestressing force, related to ka and kl
Nominal thread diameter
Thread lead
Pitch diameter
Thread angle
Friction coefficient for thread friction
Angle of friction, see my_k (11)
Friction radius, see O-ring- (2)
Calculated torque (IV)
(I)
(II)
2
(III)
"leicht geölt"
Printed in the Federal Republic of Germany
03/17/2021