Flexible Couplings
When transmitting torque from a drive shaft to a driven shaft, flexible couplings:
– Absorption and damping irregularities in the torque.
– Distribute peak loads.
– Allow misalignments and offsets between the shafts.
– Permit some distortions in the mounting beds.
– Avoid the unwelcome constraints that may occur if a rigid coupling were fitted in the same conditions.
– Allow a lighter construction, with wider tolerances, and lower cost.
– Moreover, there is no play and it therefore runs silently, without friction and does not need to be greased.
A flexible coupling is absolutely essential if the machines that are coupled are on flexible mountings.
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Flexible element:
1. Natural rubber block bonded to.
2. V-shaped metal armatures.
Flange: aluminium or cast-iron.
3. Drive segment.
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Flexible element 1: polyurethane in the form of a Maltese cross.
Flange 2: cast iron with drive segments 3 supplied unbored (except633054 and 633055).
Variations : For assemblies with a ring or spacer, consult our technical manuals.
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Flexible element:
1 Precompressed natural rubber
2 Bonded metal spacers,
3 Precompression band (to be removed after installation).
Flange:
4 Die-cast steel (except 632320 which is cast-iron).
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Flexible element:
1 Precompressed natural rubber.
2 Bonded metal spacers.
3 Precompression band (to be removed after installation).
Flange:
4 Die-cast steel specially bored to fit the separate hub.
5 Universal separate hub (not supplied by PAULSTRA).
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Flexible element:
1 Precompressed natural rubber.
2 Bonded metal reinforcing mountings.
3 Precompression band (to be removed after installation).
Flange:
4 Die-cast steel (except 632267 which is cast-iron).
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Flexible element:
1 Metallic bobbins linked together by rayon fibres.
2 The whole unit 1 is potted in natural rubber and is hexagonal.
Flange 3: forged steel.
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Flexible element:
1 Metallic bobbins linked together by rayon fibres.
2 The whole unit 1 is potted in natural rubber and is hexagonal.
Flange:
3 Forged steel specially bored to accommodate the separate hub.
4 Universal separate hub (not supplied by PAULSTRA).
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Flexible element 1 composed of:
2 Natural rubber ring.
3 Internal armature bonded to the rubber.
4 External collar force fitted to the rubber.
Flanges 5: die-cast steel fixed on to the internal armature 3 and collar 4.
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Flexible element:
1 Formed of solid natural rubber.
2 External steel surround, bonded to the rubber.
3 Triangular hub: a hollow hub bonded to the rubber and attached to the flange 5, or a solid hub which accommodates a grooved or keyed shaft.
Steel flanges:
4 round.
5 triangular.
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Flexible element made up of a variable number of FLEXIBLE STUDS
1 depending on the torque to be transmitted:
2 Solid natural rubber blocks in the form of a truncated cone.
3 Internal armature bonded to the rubber.
4 Threaded stud.
5 External armature bonded to the rubber.
6 Studding welded to armature.
7 Cylindrical metal cover.
Steel disks:
8 Two identical disks, bolted to the flanges 10 and with slits 9 to house the studs 1.
Flanges: 10 die-cast steel.
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Flexible element:
1 Six fairly hard natural rubber shaped support blocks, on the inside edge of the outer ring of the coupling.
Flange:
2 inside flange has six arms which fit axially between the blocks by “blind axial” assembly.
Outer ring:
3 Ring with teeth that hold the blocks.
Standard SAE fixing and centring.
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Flexible element comprising:
1 Natural rubber in the form of a cross.
2 A floating aluminium star, whose arms are bonded to the rubber.
Mountings:
3 Two aluminium bosses, bonded to the rubber, which will be attached to one of the machines.
4 Two aluminium bosses, bonded to the rubber, which will be attached to the other machine.
5 Band for precompressing the rubber before assembly.
Two retaining bars are supplied although not shown in the photo.
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Flexible element comprising:
1 Natural rubber in the form of a cross.
2 A floating aluminium or steel star, whose arms are bonded to the rubber.
Mountings:
Two aluminium bosses, bonded to the rubber which will be attached to one of the machines.
Two bosses bonded to the rubber which will be attached to the other machine.
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Flexible element comprising a variable number of flexible bushes, depending on the torque to be transmitted.
1 Inner with tapped or smooth holes (normal mounting or on fly wheel).
2 Precompressed natural rubber bonded to inner 1 and to outer the half-cylinders 3.
3 Half-cylinders bonded to the rubber.
4 Outer housing ensuring precompression of rubber by exerting pressure on the half-cylinders 3.
Steel disks:
5 Flange to which the inner studs are attached (normal mounting).
6 Disk to which the studs are attached (flywheel mounting).
Die cast steel hubs:
7 The two hubs are identical. They may be bolted to disks 5 or 6 depending on the mounting used.