Flexible couplings RUPEX series Siemens
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Область применения
RUPEX couplings are available as a catalog standard in 26 sizes with a rated torque of between 200 Nm and 1300000 Nm.
The coupling is suitable for ambient temperatures of between –30 °C and +80 °C. By using alternative elastomer buffers the ambient temperature range can be extended to between –50 °C and +100 °C.
Frequently, the coupling is used to connect the gear shaft to the driven machine. In the case of drives without gear units, the coupling is particularly suitable for operation in rough conditions or heavy-duty drives with electric motor drive. Ventilator drives with high ventilator mass and drives in the cement industry are typical applications.
Examples of particularly safety-relevant areas of application are cable railway drives, lifting gear for crane drives or escalator drives.
Обзор
Coupling suitable for potentially explosive environments. Complies with Directive 94/9/EC for:
II 2 G T4 / T5 / T6 D120 °C
–30 °C ≤ Ta ≤ +80 °C / +50 °C / +40 °C
I M2
RUPEX pin and bush couplings link machine shafts and compensate for shaft misalignment with weak restorative forces.
The torque is conducted through elastomer buffers, so the coupling has typically flexible rubber properties.
Thanks to their robust design, RUPEX couplings are also suitable for rough operating conditions.
Дизайн
A RUPEX coupling comprises two hub sections which are mounted on the machine shafts. The hub parts are connected positively by steel pins and elastomer buffers. The coupling can be fitted with add-on parts such as brake disks or brake drums. Up to size 360, the pins and buffers are fitted on one side. From size 400 up, the pins and buffers are fitted in the hubs on alternate sides.
Materials
Hubs
- Type RWN and RWB made of grey cast iron EN-GJL-250
- Types RWS and RBS made of steel
Flange
Types RFN, RFS made of steel
Pin
Material steel 42CrMo4, surface fine-machined
Buffer material
Material/description | Hardness | Identification | Ambient temperature |
---|---|---|---|
NBR standard type | 80 ShoreA | Buffer black | –30 °C ... +80 °C |
NBR electrically insulating | 80 ShoreA | Buffer green | –30 °C ... +80 °C |
NBR soft | 60 ShoreA | Buffer black with green dot | –30 °C ... +80 °C |
NBR hard | 90 ShoreA | Buffer black with magenta dot | –30 °C ... +80 °C |
NR for low temperature | 80 ShoreA | Buffer black with white dot | –50 °C ... +50 °C |
HNBR high temperature | 80 ShoreA | Buffer black with red dot | –10 °C ... +100 °C |
Brake disks
- Type RWB made of EN-GJS-400 spheroidal graphite cast iron
- Type RBS made of steel
Brake drums
- Type RWB made of EN-GJL-250 grey cast iron
- Type RBS made of steel
RUPEX pin and bush coupling types
Type | Description |
---|---|
RWN | Coupling made of grey cast iron |
RWS | Coupling made of steel |
RWB | Coupling made of grey cast iron with brake drum or brake disk |
RBS | Coupling made of steel with brake drum or brake disk |
RFN | Coupling made of grey cast iron in flange-shaft variant |
RFS | Coupling made of steel in flange-shaft variant |
Further application-related coupling types are available. Dimension sheets for and information on these are available on request.
RUPEX pin and bush coupling types on request
Type | Description |
---|---|
All | Coupling with axial backlash limitation |
All | Coupling with pretensioned buffers |
All | Coupling with lengthened pins and spacer sleeves |
RKS | Coupling for engaging/disengaging during standstill |
RWNH, RWSH | Coupling with extension piece |
RBM | Coupling with lengthened pins for sliding rotor motors |
RAK | Coupling combination RUPEX with ARPEX all-steel membrane coupling |
Types RWN/RWS – One-sided arrangement of pins and buffers
Types RWN/RWS – Alternate-sided arrangement of pins and buffers
Types RWB/RBS with brake drum
Types RWB/RBS with brake disk
Types RFN, RFS
Функции
The motor torque is transmitted to the hub on the drive side via the shaft-hub connection, which is mostly designed as a keyway connection. With the aid of elastomer buffers mounted on steel pins, the torque is conducted to the hub on the output side.
The hub on the output side further transmits the torque to the driven machine or a gear unit located in between. Because of the primarily compression-loaded buffers, the coupling has a progressive torsional stiffness.
Особенности
RUPEX couplings can also hold loads when overloaded and are therefore especially suitable for drives for special safety and reliability requirements.
Torque shock loads and changing loads are no problem for robust, compact flexible RUPEX couplings.
The steel variant is also especially suitable for high-speed drives.
RUPEX couplings are fitted by putting together the coupling halves. Fitting with low torsional backlash is simplified by the barrel-shaped geometry of the buffers.
RUPEX couplings require little maintenance. Only the elastomer buffers, as wear parts, need be replaced and the coupled machines need not be moved to do so.
RUPEX couplings are suitable for reversing operation and horizontal and vertical fitting or fitting at any required angle.
Технические данные
Power ratings
Size | Rated torque for buffer type | Torsional stiffness at 50 % | Assembly | Permitted shaft misalignment at speed n = 1500 rpm1) | ||||||
---|---|---|---|---|---|---|---|---|---|---|
65 ShoreA | 80 ShoreA | 90 ShoreA | 65 ShoreA | 80 ShoreA | 90 ShoreA | Gap dimension | Axial | Radial | Angle | |
TKN | TKN | TKN | CTDyn 50 % | CTDyn 50 % | CTDyn 50 % | ΔS | ΔKa | ΔKr | ΔKw | |
Nm | Nm | Nm | kNm/rad | kNm/rad | kNm/rad | mm | mm | mm | Degree | |
105 | 120 | 200 | 200 | 5 | 13 | 21 | 1.0 | 0.2 | 0.2 | 0.11 |
125 | 210 | 350 | 350 | 9 | 25 | 37 | 1.0 | 0.2 | 0.2 | 0.10 |
144 | 300 | 500 | 500 | 15 | 43 | 64 | 1.0 | 0.23 | 0.23 | 0.09 |
162 | 450 | 750 | 750 | 20 | 55 | 83 | 1.5 | 0.25 | 0.25 | 0.09 |
178 | 570 | 950 | 950 | 31 | 85 | 130 | 1.5 | 0.27 | 0.27 | 0.09 |
198 | 780 | 1300 | 1300 | 43 | 123 | 187 | 1.5 | 0.29 | 0.29 | 0.08 |
228 | 1300 | 2200 | 2200 | 65 | 184 | 270 | 1.5 | 0.3 | 0.3 | 0.08 |
252 | 1650 | 2750 | 2750 | 92 | 256 | 380 | 1.5 | 0.34 | 0.34 | 0.08 |
285 | 2600 | 4300 | 4300 | 141 | 390 | 560 | 1.5 | 0.36 | 0.36 | 0.07 |
320 | 3300 | 5500 | 5500 | 195 | 540 | 790 | 1.5 | 0.4 | 0.4 | 0.07 |
360 | 4700 | 7800 | 7800 | 276 | 610 | 940 | 1.5 | 0.43 | 0.43 | 0.07 |
400 | 7500 | 12500 | 12500 | 410 | 1130 | 1710 | 1.5 | 0.48 | 0.48 | 0.07 |
450 | 11000 | 18500 | 18500 | 570 | 1600 | 2380 | 1.5 | 0.52 | 0.52 | 0.07 |
500 | 15000 | 25000 | 25000 | 860 | 2350 | 3600 | 1.5 | 0.57 | 0.57 | 0.07 |
560 | 23500 | 39000 | 39000 | 1130 | 3070 | 4700 | 2.0 | 0.62 | 0.62 | 0.06 |
630 | 31000 | 52000 | 52000 | 1640 | 4600 | 7400 | 2.0 | 0.68 | 0.68 | 0.06 |
710 | 50000 | 84000 | 84000 | 2560 | 7200 | 10900 | 2.0 | 0.75 | 0.75 | 0.06 |
800 | 66000 | 110000 | 110000 | 3900 | 10700 | 16700 | 2.0 | 0.84 | 0.84 | 0.06 |
900 | 90000 | 150000 | 150000 | 5200 | 14300 | 22500 | 2.5 | 0.93 | 0.93 | 0.06 |
1000 | 115000 | 195000 | 195000 | 7700 | 21300 | 33000 | 2.5 | 1.03 | 1.03 | 0.06 |
1120 | 160000 | 270000 | 270000 | 9800 | 27300 | 44000 | 2.5 | 1.14 | 1.14 | 0.06 |
1250 | 205000 | 345000 | 345000 | 14000 | 39000 | 62000 | 2.5 | 1.26 | 1.26 | 0.06 |
1400 | 320000 | 530000 | 530000 | 22800 | 62000 | 97000 | 3.0 | 1.39 | 1.39 | 0.06 |
1600 | 450000 | 750000 | 750000 | 37000 | 103000 | 160000 | 3.0 | 1.55 | 1.55 | 0.06 |
1800 | 585000 | 975000 | 975000 | 48000 | 133000 | 208000 | 4.0 | 1.76 | 1.76 | 0.06 |
2000 | 780000 | 1300000 | 1300000 | 73000 | 201000 | 314000 | 4.0 | 2.17 | 2.17 | 0.06 |
1) The maximum speed of the respective type must be noted. For further information on permissible shaft misalignment, please see the operating instructions
All product codes listed below apply to standard buffers of NBR material in the 80 ShoreA variant.
For maximum coupling torque:
TKmax = 3.0 · TKN
For overload torque:
TKOL = 4 · TKN
For coupling fatigue torque:
TKW = 0.20 · TKN
The axial misalignment may occur dynamically at frequencies up to 10Hz.
For fitting, a maximum gap dimension of Smax = S + ΔS and a minimum gap dimension of Smin = S – ΔS are permitted.
Torsional stiffness and damping
The values stated in the above table apply to a capacity utilization of 50 %, an excitation amplitude of 10 % TKN with the frequency 10 Hz and an ambient temperature of 20 °C. Dynamic torsional stiffness is dependent on load and increases in proportion to capacity utilization. The following table shows the correction factors for different nominal loads.
CTdyn = CTdyn 50 % · FKC
Capacity utilization TN / TKN | ||||||||
---|---|---|---|---|---|---|---|---|
20 % | 40 % | 50 % | 60 % | 70 % | 80 % | 90 % | 100 % | |
Correction factor FKC | 0.51 | 0.83 | 1.00 | 1.18 | 1.38 | 1.58 | 1.80 | 2.03 |
The damping coefficient is Ψ = 1.4
Furthermore, torsional stiffness and damping depend on the ambient temperature and the frequency and amplitude of the torsional vibration excitation. More precise torsional stiffness and damping parameters on request.
Permitted shaft misalignment
The permitted shaft misalignment depends on the operating speed. As the speed increases, lower shaft misalignment values are permitted. The following table shows the correction factors for different speeds.
The maximum speed for the respective coupling size and type must be observed!
ΔKperm = ΔK1500 · FKV
Speed in rpm | ||||
---|---|---|---|---|
500 | 1000 | 1500 | 3000 | |
Correction factor FKV | 1.60 | 1.20 | 1.0 | 0.70 |
The axial misalignment may occur dynamically at frequencies up to 10 Hz. For fitting, a maximum gap dimension of Smax = S + ΔS and a minimum gap dimension of Smin = S – ΔS are permitted.
Shaft misalignments ΔKa, ΔKr and ΔKw may occur simultaneously.