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TSCHAN® POSIMIN® - NZN

Double engagement design - Variable spacer length

The TSCHAN®-Coupling POSIMIN® is a torsionally rigid steel disk coupling. It compensates for angular, radial and axial shaft misalignments within defined ranges. The coupling transmits torque without backlash through flexible steel disks loaded in tension. The spacer can be radially mounted and dismounted without having to move the connected machines. The distance dimension ‘E’ between the flange hubs can then be used, for example, to service connected machines. When the spacer is dismounted, a check of the rotational direction of the drive can easily be performed. The coupling is suitable for use in every direction of rotation and installation position. For applications involving other than horizontal position, it may be necessary to support the spacer. Please consult RINGFEDER POWER TRANSMISSION, if this has not been considered when selecting the coupling.

NZNStandard

CAD Tkmax n1) d1, d2   L1 D3 D4 S1 S2
  [Nm] [min-1] max. Standard          
  155 13900 28 50 30 39 69 7 7.8
  200 11500 38 60 35 53 83 7 7.8
  270 10300 45 70 40 63 93 7 7.8
  650 8100 55 86 50 77 118 9 10.7
  900 7200 65 106 60 91 133 9 10.7
  1600 6100 75 126 70 105 156 9 11.6
  2500 5700 80 130 75 112 168 12 12.5
  4300 5150 85 140 80 118 186 13 13.4
  5200 4000 90 160 90 128 195 13 13.4
  8000 4300 100 170 100 139 222 18 22.8
  9400 4030 110 190 110 154 237 18 22.8
  13900 3650 115 200 115 158 262 20 24.4
  15000 3450 125 220 125 174 278 20 24.4
  27000 2900 145 250 145 197 330 25 32
  32400 2600 170 300 170 232 365 25 32
  50400 2250 200 350 200 269 425 30 38
  57600 2100 225 400 225 304 460 30 38
  84600 1900 245 430 245 345 510 36 44
  130000 1650 275 480 275 390 580 41 50
  144000 1500 325 580 325 455 645 41 50

POSIMIN® NZN

Coupling with radially removable spacer for bridging variable distances between shaft ends.

General features

  • Torsionally rigid multiple disk coupling
  • Suitable for use in higher temperature ranges
  • Compensates for angular, radial and axial shaft offset
  • No maintenance required, no wear, high operational safety
  • Excellent true running quality
  • Backlash-free torque transmission
  • Outer diameter up to 460 mm, bores up to 225 mm
  • Torques up to TKn = 32,000 Nm / TKmax = 57,600 Nm
  • Speeds up to nmax = 13,900 rpm

General description

POSIMIN® all-steel, multiple disc couplings are torsionally rigid, free from backlash, flectionally elastic and maintenance­ free. They fulfill individual requirements in a compact way, using standard elements in a unit construction system.

Advantages

  • High operation reliability
  • Maintenance-free
  • Wear-resistant
  • Small outer diameters permit small mounting spaces and high speeds in cases where torque transmission is high
  • Easy fitting due to a one-piece spacer and pre-assembled disc packs
  • Inserted bushes fix and centre the disc pack on to the intermediate casing
  • A high degree of balance due to the minimal number of surfaces to be centred
  • Backlash-free  power transmission due to discs of stainless spring steel

Free from backlash

The power transmitting POSIMIN coupling disc pack guarantees a torque transmission which is free from backlash in both directions of rotation, as a result of the frictionally engaged and form-fit linkage at each of 3 points.

Torsionally rigid

POSIMIN couplings are made of high grade C-Steels and the disc packs of corrosion-resistant spring steel.The coupling transmits the torque homokinetically in all four quadrants, due to the three-fold linkage and high spring rigidity.

With axial,radial and angular movement

The flectionally elastic element of the POSIMIN coupling consists of a laminated disc pack.Each disc pack contains a number of individual, thin, stainless steel spring discs, from which minimal restoring forces result, in cases of misalignment.

Maintenance-free

The guide bushes and high tensile fitbolts centre the disc pack precisely and facilitate the frictionally engaged Introduction of the tensile load into the disc pack without tribocorrosion. The highly developed construction, guarantees maintenance-free, ultimited operation, where the selection and operating criteria specified by the manufacturer are observed.

Easy-to-install

The laminated discs are pre-assembled in disc packs, centred with precision using the newly developed contoured support bushings as a clamping system. These flectionally elastic, torsionally rigid spring assemblies are inserted with the spacer into the specially designed guide. Having aligned the shaft ends. is then possible tor the fitter to clamp the resulting assembly to the attached counterflanges, without the need for further tools.

Smooth-running

The POSIMIN series has a particularly compact design. All coupling elements are manufactured on ultramodern NC machining centers with 1he most exact of tolerances. The series-manufactured POSIMIN couplings are therefore extremely true running and have a minimal axial run out. This has a direct effect on the balancing quality, which, in turn, effects the particularly smooth running of the coupling.

Temperature

The POSIMIN all-steel multiple disc coupling system, Including the selflocking nuts, is suitable for application, without restrict on, at temperatures of between -40 degrees C and +280 degrees C.

Unit construction system

Each size of coupling has a range of precision-machined standard parts which can be freely combined. Multifunctlonal components guarantee a high degree of availability.

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