The RINGFEDER® barrel coupling, design according to operation sheet of German Steel Iron Industry SEB 666212, consists of a sleeve, made of reinforced-material, equipped with semi-circular internal teeth and a hub, made of reinforced-material, with semi-circular external teeth of the same shape. In the resulting circular recording hardened steel barrel rollers are used, which serve as power transmission elements. Additional retainer rings improve axial fixing of the barrel rollers by created axail rope. Inner and outer covers, each of which is equipped with a lip seal, effectively prevent foreign matter from entering and lubricant from escaping.

The proven design with hub and housing made of high-strength material allows more torque and higher radial force in the same space

TNK TKVSG

CAD
Identifier
SEB 666212
Size
TKmax
Nm
Frad
N
d1kmax
mm
D
mm
L
mm
D1
mm
H2
mm
FK
mm
C
mm
WG7340 SG130 200 31500 48000 140 400 170 200 45 15 360
WG7342 (*) 300 39000 53000 155 420 175 220 45 15 380
WG7345 SG140 400 53500 75000 183 450 185 260 60 20 400
WG7351 (*) 500 91000 118000 210 510 220 295 60 20 460
WG7355 SG185 600 127000 132000 220 550 240 310 60 20 500
WG7358 SG200 1000 180000 145000 250 580 260 350 60 20 530
WG7365 SG240 1500 241000 184000 295 650 315 415 65 25 600
WG7366 (*) 2100 360000 283000 305 665 330 430 65 25 615
WG7368 SG270 2600 425000 330000 315 680 350 445 65 25 630
WG7371 SG315 3400 529000 366000 335 710 380 475 81 35 660
WG7378 SG355 4200 660000 420000 380 780 410 535 81 35 730
WG7385 SG400 6200 815000 490000 425 850 450 600 81 35 800
WG7394 (*) 8200 930000 525000 460 940 500 650 86 40 875
WG7310 (*) 9200 1100000 550000 490 1025 500 695 86 40 945
WG7311 (*) 10200 1390000 670000 550 1120 500 780 86 40 1040
CAD Identifier
SEB 666212
Size
TKmax
ft-lbs
Frad
lbs
d1kmax
inch
D
inch
L
inch
D1
inch
H2
inch
FK
inch
C
inch
  WG7340 SG130 200 23233 10787 5.512 15.748 6.693 7.874 1.772 0.591 14.173
  WG7342 (*) 300 28765 11911 6.102 16.535 6.890 8.661 1.772 0.591 14.961
  WG7345 SG140 400 39460 16855 7.205 17.717 7.283 10.236 2.362 0.787 15.748
  WG7351 (*) 500 67119 26518 8.268 20.079 8.661 11.614 2.362 0.787 18.110
  WG7355 SG185 600 93671 29665 8.661 21.654 9.449 12.205 2.362 0.787 19.685
  WG7358 SG200 1000 132763 32586 9.843 22.835 10.236 13.780 2.362 0.787 20.866
  WG7365 SG240 1500 177754 41351 11.614 25.591 12.402 16.339 2.559 0.984 23.622
  WG7366 (*) 2100 265525 63599 12.008 26.181 12.992 16.929 2.559 0.984 24.213
  WG7368 SG270 2600 313467 74162 12.402 26.772 13.780 17.520 2.559 0.984 24.803
  WG7371 SG315 3400 390175 82252 13.189 27.953 14.961 18.701 3.189 1.378 25.984
  WG7378 SG355 4200 486796 94387 14.961 30.709 16.142 21.063 3.189 1.378 28.740
  WG7385 SG400 6200 601120 110119 16.732 33.465 17.717 23.622 3.189 1.378 31.496
  WG7394 (*) 8200 685940 117984 18.110 37.008 19.685 25.591 3.386 1.575 34.449
  WG7310 (*) 9200 811327 123603 19.291 40.354 19.685 27.362 3.386 1.575 37.205
  WG7311 (*) 10200 1025222 150570 21.654 44.094 19.685 30.709 3.386 1.575 40.945

Characteristics

RINGFEDER® TNK serie TKVSG

Barrel couplings made of reinforced-material for use in crane/ hoist applications to support the rope drum. Through additional retainer rings improved axial fixing of the barrel body by created axial rope forces. Construction and design according to operation sheet SEB 666212.

Characteristics

  • Torsionally rigid, compensate for angular and axial shaft misalignment
  • Torque transmission by hardened, barrel shaped steel rollers
  • Equipped with wear indication
  • Outer diameters up to 1120 mm
  • Bores up to 550 mm
  • Torques up to TKmax = 1,390,000 Nm
  • Maximal radial load Frad = 670,000 N

FEATURES AND APPLICATIONS

The barrel coupling consists of a sleeve, made of reinforced-material, equipped with semi-circular internal teeth and a hub, made of reinforced-material, with semi-circular external teeth of the same shape. In the resulting circular recording hardened steel barrel rollers are used, which serve as power transmission elements. Lock rings on both sides of the barrel rollers serve for their axial guidance. Inner and outer covers, each of which is equipped with a lip seal, effectively prevent foreign matter from entering and lubricant from escaping.

Due to the curved shape of the barrel rollers, it is possible to swing the hub relative to the housing, as a result of which angular alignment errors can be compensated. Depending on the size of the coupling, axial displacements of 3 mm to 8 mm can be accommodated during operation. The torque is transmitted by means of two carrier face on the housing and their counter-carrier face into the drum. The screws, used to connect the drum, support torque transmission.

 

By using high-strength materials for hub and sleeve, the transmission capability compared to the type TK could be significantly increased.

Barrel couplings are used in material handling technology and especially in crane hoists to connect rope drums to the gear output shaft with minimum axial space. In this application, the barrel coupling transmits high torques and large radial forces and yet acts as a joint. Thus, in a rigid connection of the gear shaft with a lifting drum a three-point bearing (Figure No. 1) and thus a statically indeterminate case would result.

Then a high alignment quality is required. However, unavoidable assembly inaccuracies, deflection of the foundation under load, and wear on the bearing cause enormous additional forces has to be absorbed by the stored gear shaft. Alternating bending stress can cause fatigue failure and bearing and gear damage.

In order to avoid this risk, barrel couplings between the gearbox and the rope drum are positioned, which, due to their characteristics, compensate angular misalignments. With the barrel coupling in a three-point bearings, a statically indeterminate becomes a statically determined drive train, whereby high bending moments and constraining forces are avoided. Figure 3 shows the assembly of a barrel coupling in a hoist. Taking into account that the coupling absorbs displacements and thus acts as a floating bearing, a spherical roller bearing is to be provided as a fixed bearing at the other end of the drum shaft.

Barrel Coupling

In the recommended mounting Fig. 2, the barrel coupling, which is installed between the gearbox and rope drum, performs the function of an articulated joint, thus making the connection statically determinate and avoiding the occurrence of high bending moments.

Downloads

Product Paper Barrel Couplings RINGFEDER® TNK

Product Paper Barrel Couplings RINGFEDER® TNK

Tech Paper Barrel Couplings RINGFEDER® TNK TKVSG

Tech Paper Barrel Couplings RINGFEDER® TNK TKVSG

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