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Flexible couplings N-BIPEX series

  • Информационные материалы

    Информационные материалы

    Flexible couplings, N-BIPEX

    N-BIPEX couplings are torsionally flexible and are outstanding for their particularly compact design and low weight.

    N-BIPEX couplings are used in many areas of mechanical engineering.

    Their main area of use is in electric motor drives which are well aligned and have uniform torque loads, such as in hydraulic applications and in combinations with geared motors.

    Область применения

    Cam rings, 92 ShoreA, 95 ShoreA, 64 ShoreD

    The N-BIPEX coupling is available as a catalog standard in 10 sizes with rated torques of between 12 Nm and 4650 Nm and is made of high-grade spheroidal graphite cast iron.

    The extremely high-performance cam ring materials are available from stock in three different Shore hardnesses with the following colors:

    • 92 ShoreA – red
    • 95 ShoreA – gren
    • 64 ShoreD – blue

    Cam rings, 92 ShoreA

    An additional size marking has been provided on the outer surface of the cam ring to be able to determine the size of the N-BIPEX even when it is in the assembled state without having to use any additional aids.

    The coupling is suitable for use at ambient temperatures between -50 °C and +100​ °C without any restrictions on the rated torque as a result of temperature factors.

    Coupling suitable for use in potentially explosive atmospheres.
    Complies with the current ATEX Directive for:

     

    II 2 G IIB T4/T5/T6
    -50 °C ≤ Ta ≤ +100​ °C/+70 °C/+55 °C

     

    II 2D T 120°C
    -50 °C ≤ Ta ≤ +90​ °C

     

    I M2



    Дизайн

    The N-BIPEX coupling of type BWN comprises two identical hub parts connected by a cam ring of elastomer material.

    The hubs are connected to the respective shafts via finished bores with parallel keyway connection.

    N-BIPEX couplings are positive-locking and torsionally flexible thanks to the thermoplastic polyurethane cam ring.

    Coupling materials

    Hubs

    EN-GJS-400-15

    Cam ring

    • TPU 92 ShoreA -50 °C to +100 °C without any restrictions
    • TPU 95 ShoreA -50 °C to +100 °C without any restrictions
    • TPU 64 ShoreD -50 °C to +100 °C without any restrictions

    N-BIPEX, Type BWN, flexible couplings

    Size

    Undrilled

    Preferred bores from stock with cylindrical finished bores ∅ in mm H7, parallel keyway according to DIN 6885-1 JS9 and set screw

      

    10

    11

    12

    14

    15

    16

    17

    18

    19

    20

    22

    24

    25

    28

    30

    32

    35

    38

    40

    42

    45

    48

    50

    55

    60

    65

    70

    75

    80

    85

    90

    100

    110

    120

    19

                         

    24

                      

    28

       

                   

    38

         

                

    42

             

              

    48

               

             

    55

                

           

    65

                   

         

    75

                    

       

    90

                        



    ✓ Preferred bores

    Функции

    The torque is transmitted to the hub at the drive end via the shaft-hub connection, which is mostly designed as a keyway connection, and is transmitted to the hub on the output side via the cam ring. This hub then further transmits the torque to the driven machine or a gear unit placed in between. The special cam design helps to keep the compression-loaded cam ring elements in their defined position under all operating conditions and to keep them evenly loaded. This results in a long lifetime of the flexible elements. A long lifetime is also guaranteed by the hub parts which ensure maximum operational reliability even under harsh operating conditions.

    Особенности

    N-BIPEX couplings are suitable for horizontal, vertical and freely selectable mounting positions. They are able to absorb axial, radial and angular misalignment.

    N-BIPEX couplings consist of two identical hub parts which can be arranged as required on the shaft extensions to be connected. N-BIPEX couplings transmit the torque positively and are thus fail-safe. The curved design of the cast cams ensures that the N-BIPEX couplings have a perfect pressure distribution and this increases the elastomer lifetime.

    The flexible cam rings responsible for torque transmission and misalignment compensation are available in different Shore hardnesses. As a result of the good damping capability and by selecting the suitable stiffness, torque shock loads can thus be absorbed and the torsional vibration behavior of the drive can be positively influenced. Different cam ring versions and ready-to-install hub parts are available from stock.

    Технические данные

    Cam rings

    Cam rings of polyurethane 92 ShoreA (standard)

    Size

    Rated torque

    Maximum torque

    Fatigue torque

    Maximum speed

    Damping coefficient ψ

    Torsional stiffness at 50 % capacity utilization

    Permitted shaft misalignment at 1)

        

    V ≤ 45 m/s

      

    < 10 Hz

    n = 1500 rpm

     
     

    TKN

    TKmax

    TKW

    nmax

     

    CTdyn 50 %

    ΔKa

    ΔKr

    ΔKw

     

    Nm

    Nm

    Nm

    rpm

     

    Nm/rad

    mm

    mm

    degrees

    19

    12

    36

    2

    19500

    1.4

    530

    0.30

    0.17

    0.5

    24

    45

    135

    7

    14500

    1.4

    1790

    0.40

    0.23

    0.5

    28

    95

    285

    14

    12500

    1.4

    3060

    0.50

    0.25

    0.5

    38

    190

    570

    29

    10000

    1.4

    6500

    0.60

    0.29

    0.5

    42

    265

    795

    40

    8500

    1.4

    8200

    0.70

    0.34

    0.5

    48

    330

    990

    50

    7500

    1.4

    10000

    0.80

    0.38

    0.5

    55

    460

    1380

    70

    6500

    1.4

    14500

    0.90

    0.40

    0.5

    65

    670

    2010

    100

    6000

    1.4

    25600

    1.00

    0.45

    0.5

    75

    1400

    4200

    210

    5000

    1.4

    37400

    1.20

    0.52

    0.5

    90

    2500

    7500

    375

    4000

    1.4

    62700

    1.40

    0.60

    0.5



    1) DThe maximum speed must be observed. Please refer to the Operating Instructions for further information on permitted shaft misalignment.

    Cam rings of polyurethane 95 ShoreA (Ordering option -Z and order code K01)

    Size

    Rated torque

    Maximum torque

    Fatigue torque

    Maximum speed

    Damping coefficient ψ

    Torsional stiffness at 50 % capacity utilization

    Permitted shaft misalignment at 1)

        

    V ≤ 45 m/s

      

    < 10 Hz

    n = 1500 rpm

     
     

    TKN

    TKmax

    TKW

    nmax

     

    CTdyn 50 %

    ΔKa

    ΔKr

    ΔKw

     

    Nm

    Nm

    Nm

    rpm

     

    Nm/rad

    mm

    mm

    degrees

    19

    18

    54

    3

    19500

    1.4

    1130

    0.27

    0.15

    0.4

    24

    65

    195

    10

    14500

    1.4

    4240

    0.36

    0.21

    0.4

    28

    160

    480

    25

    12500

    1.4

    8050

    0.45

    0.23

    0.4

    38

    325

    975

    50

    10000

    1.4

    14100

    0.54

    0.26

    0.4

    42

    450

    1350

    70

    8500

    1.4

    16200

    0.63

    0.31

    0.4

    48

    550

    1650

    85

    7500

    1.4

    23300

    0.72

    0.34

    0.4

    55

    700

    2100

    105

    6500

    1.4

    28500

    0.81

    0.36

    0.4

    65

    1000

    3000

    150

    6000

    1.4

    35000

    0.90

    0.41

    0.4

    75

    2000

    6000

    300

    5000

    1.4

    66300

    1.08

    0.47

    0.4

    90

    3700

    11100

    555

    4000

    1.4

    105000

    1.26

    0.54

    0.4



    1) The maximum speed must be observed. Please refer to the Operating Instructions for further information on permitted shaft misalignment.

    Cam rings of polyurethane 64 ShoreD (Ordering option -Z and order code K04)

    Size

    Rated torque

    Maximum torque

    Fatigue torque

    Maximum speed

    Damping coefficient ψ

    Torsional stiffness at 50 % capacity utilization

    Permitted shaft misalignment at 1)

        

    V ≤ 45 m/s

      

    < 10 Hz

    n = 1500 rpm

     
     

    TKN

    TKmax

    TKW

    nmax

     

    CTdyn 50 %

    ΔKa

    ΔKr

    ΔKw

     

    Nm

    Nm

    Nm

    rpm

     

    Nm/rad

    mm

    mm

    degrees

    19

    25

    75

    5

    19500

    1.4

    2010

    0.24

    0.14

    0.3

    24

    90

    270

    15

    14500

    1.4

    7680

    0.32

    0.18

    0.3

    28

    200

    600

    30

    12500

    1.4

    12200

    0.40

    0.20

    0.3

    38

    405

    1215

    60

    10000

    1.4

    25100

    0.48

    0.23

    0.3

    42

    560

    1680

    84

    8500

    1.4

    32000

    0.56

    0.27

    0.3

    48

    700

    2100

    105

    7500

    1.4

    41200

    0.64

    0.30

    0.3

    55

    925

    2775

    140

    6500

    1.4

    52600

    0.72

    0.32

    0.3

    65

    1200

    3600

    180

    6000

    1.4

    86700

    0.80

    0.36

    0.3

    75

    2600

    7800

    390

    5000

    1.4

    143000

    0.96

    0.42

    0.3

    90

    4650

    13950

    700

    4000

    1.4

    234000

    1.12

    0.48

    0.3



    1) The maximum speed must be observed. Please refer to the Operating Instructions for further information on permitted shaft misalignment.

    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 frequency 10 Hz and an ambient temperature of 20 °C. The dynamic torsional stiffness (CTdyn) is load-dependent and increases in proportion to capacity utilization. The following table shows the correction factors for different nominal load.

    CTdyn = CTdyn 50 % • FKC

     

    Capacity utilization TN / TKN

     

    20 %

    40 %

    50 %

    60 %

    70 %

    80 %

    100 %

    Correction factor FKC
    92/95 ShoreA and 64 ShoreD

    0.56

    0.85

    1.00

    1.17

    1.35

    1.53

    1.92



    Furthermore, torsional stiffness and damping depend on the ambient temperature, the frequency and the amplitude of the torsional vibration excitation. More precise torsional stiffness and damping parameters on request.

    With flexible couplings the manufacturing process of the rubber elements and their aging primarily influence the stiffness value CTdyn. For this reason calculation must be made with a tolerance for the dynamic stiffness of ±20 %. The specified damping coefficient ψ is a minimum value with the result that the damping performance of the coupling corresponds at least to the specified value.

    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 depending on the respective coupling size and type must be observed!

    ΔKzul = ΔK1500 • FKV

     

    Speed in rpm

     

    500

    1000

    1500

    3000

    Correction factor FKV

    1.20

    1.10

    1.00

    0.7



    The axial misalignment may occur dynamically at frequencies up to 10 Hz. For fitting, the maximum gap dimension of S2 max. = S2 + ΔS2 and the minimum gap dimension of S2 min. = S2 - ΔS2 are permitted.

    The shaft misalignments ΔKa, ΔKr und ΔKw may occur simultaneously (see under "Couplings"/"Technical Informations"/"Shaf misalignment").

    Assignment of N-BIPEX sizes to output PM of IEC standard motors

    The assignment applies for an service factor of 1.25 and the use of a standard cam ring (92 ShoreA).

    Three-phase motor

    Motor

    N-BIPEX coupling

    Motor

    N-BIPEX coupling

    Motor

    N-BIPEX coupling

    Motor

    N-BIPEX coupling

    DE shaft end D × E acc. to IEC

    Size

    Output at ≈ 3000 rpm

    Size

    Output at ≈ 1500 rpm

    Size

    Output at ≈ 1000 rpm

    Size

    Output at ≈ 750 rpm

    Size

     

    PM

    T

     

    PM

    T

     

    PM

    T

     

    PM

    T

     

    D

    E

     

    kW

    Nm

     

    kW

    Nm

     

    kW

    Nm

     

    kW

    Nm

     

    mm

    mm

    80

    0.75

    2.5

    19

    0.55

    3.7

    19

    0.37

    3.9

    19

    0.18

    2.5

    19

    19

    40

    1.1

    3.7

    19

    0.75

    5.1

    19

    0.55

    5.8

    19

    0.25

    3.5

    19

    19

    40

    90S

    1.5

    5.5

    19

    1.1

    7.5

    19

    0.75

    8

    19

    0.37

    5.3

    19

    19

    40

    1.5

    5.5

    19

    1.1

    7.5

    19

    0.75

    8

    19

    0.37

    5.3

    19

    24

    50

    90L

    2.2

    7.4

    19

    1.5

    10

    24

    1.1

    12

    24

    0.55

    7.9

    24

    19

    40

    2.2

    7.4

    19

    1.5

    10

    24

    1.1

    12

    24

    0.55

    7.9

    24

    24

    50

    100L

    3

    9.8

    24

    2.2

    15

    24

    1.5

    15

    24

    0.75

    11

    24

    28

    60

    3

    20

    24

    1.5

    15

    24

    1.1

    16

    24

    28

    60

    112M

    4

    13

    24

    4

    27

    24

    2.2

    22

    24

    1.5

    21

    24

    28

    60

    132S

    5.5

    18

    28

    5.5

    36

    28

    3

    30

    28

    2.2

    30

    28

    38

    80

    7.5

    25

    28

    132M

       

    7.5

    49

    28

    4

    40

    28

    3

    40

    28

    38

    80

       

    5.5

    55

    28

    38

    80

    160M

    11

    36

    38

    11

    72

    38

    7.5

    75

    38

    4

    54

    38

    42

    110

    15

    49

    38

    5.5

    74

    38

    42

    110

    160L

    18.5

    60

    38

    15

    98

    38

    11

    109

    38

    7.5

    100

    38

    42

    110

    180M

    22

    71

    38

    18.5

    121

    38

          

    48

    110

    180L

       

    22

    144

    38

    15

    148

    42

    11

    145

    42

    48

    110

    200L

    30

    97

    42

    30

    196

    42

    18.5

    181

    42

    15

    198

    42

    55

    110

    37

    120

    42

    22

    215

    42

    55

    110

    225S

       

    37

    240

    48

       

    18.5

    244

    48

    60

    140

    225M

    45

    145

    42

             

    55

    110

       

    45

    292

    55

    30

    293

    55

    22

    290

    55

    60

    140

    250M

    55

    177

    48

             

    60

    140

       

    55

    356

    55

    37

    361

    55

    30

    392

    65

    65

    140

    280S

    75

    241

    55

             

    65

    140

       

    75

    484

    65

    45

    438

    65

    37

    483

    65

    75

    140

    280M

    90

    289

    55

             

    65

    140

       

    90

    581

    75

    55

    535

    75

    45

    587

    75

    75

    140

    315S

    110

    353

    55

             

    65

    140

       

    110

    707

    75

    75

    727

    75

    55

    712

    75

    80

    170

    315M

    132

    423

    65

             

    65

    140

       

    132

    849

    75

    90

    873

    75

    75

    971

    75

    80

    170

    315L

    160

    513

    65

             

    65

    140

    200

    641

    75

             

    65

    140

       

    160

    1030

    75

    110

    1070

    75

    90

    1170

    90

    80

    170

       

    200

    1290

    90

    132

    1280

    90

    110

    1420

    90

    80

    170

          

    160

    1550

    90

    132

    1710

    90

    85

    170

    315

    250

    802

    75

             

    65

    140

    315

    1010

    90

             

    65

    140

       

    250

    1600

    90

    200

    1930

    90

       

    85

    170

    355

    355

    1140

    90

             

    75

    140

    400

    1280

    90

             

    75

    140

    500

    1600

    90

             

    75

    140

    400

    560

    1790

    90

             

    80

    170