ARPEX ARC-8/-10 series Siemens

Область применения



ARPEX couplings of the ARC-8 and ARC-10 series are outputand speed-optimized coupling solutions. Power transmission is by means of patented conical screw connections and plate packs of the octagonal and decagonal types. Torques of between 8.5 and 1450 kNm can be transmitted at a permitted angular misalignment of 0.2° to 0.4°. The closed flange shape and a compact construction permit high peripheral speeds and high speeds. On most types, the intermediate spacer can be radially fitted without moving the connected units.

Main areas of application for the ARC-8/-10 series:

  • Paper-making machines
  • Printing machines
  • Compressors
  • Fans and blowers
  • Generators
  • Presses
  • Conveyors
  • Crane systems
  • Pumps
  • Mills
  • Rotary furnaces
  • Stirrers

Обзор



Coupling can be designed for potentially explosive environ­ments in accordance with 94/9/EC.

Дизайн



The classic design of an ARPEX coupling of the ARC-8/-10 series type NEN is shown in the following illustration. The plate packs are bolted alternately between the flanges of the coupling hubs and the intermediate spacer. Conical screw connections are used for fastening. The intermediate spacer lengths are variably designed according to customer specifications.

Design of an ARPEX coupling, ARC-8/-10 series, type NEN

Variants of the ARPEX coupling, ARC-8/-10 series

Types

 

NEN

Variant with intermediate spacer machined on all sides, length variable

NHN

Variant with unmachined intermediate spacer, length variable

BUB

Compact variant with split intermediate spacer for short shaft distances

MFEFM

Variant with preassembled intermediate unit and machined intermediate spacer, length variable

MFHFM

Variant with preassembled intermediate unit and unmachined intermediate spacer, length variable



The coupling parts of the ARPEX ARC-8/-10 series with the exception of the H spacers have been machined on all sides. These are delivered with unmachined and primed spacer tube.

Further application-specific coupling types are available in selection module x.CAT at www.flender.com . Dimension sheets and further information are available on request.

Особенности



ARPEX couplings of the ARC-8/-10 series are outstanding for their robust construction. They have been optimized for high torques combined with high speeds. The patented conical screw connection ensures reliable torque transmission by a true positive fit and is designed to be extremely easy to fit. Couplings can be designed for potentially explosive environments in accordance with 94/9/EC.

Технические данные



Power ratings

Size

Rated torque

Maximum torque

Overload torque

Fatique torque

Maximum speed

Maximum permitted shaft misalignment

Torsional stiffness

 

TKN

TKmax

TKOL

TKW

nKmax

±ΔKa

±ΔKw

±ΔKr

CTdyn

        

NEN
NHN

BUB

MFEFM
MFHFM

NEN
for

NHN

BUB

MFEFM
for

MFHFM

        

S = 1000 mm

 

S = 1000 mm

Smin

S = 1000 mm

 

Smin

S = 1000 mm

 

kNm

kNm

kNm

kNm

rpm

mm

 

mm

mm

mm

MNm/rad

MNm/rad

MNm/rad

MNm/rad

MNm/rad

225-8

8.5

17

25.5

4.25

8500

1.94

0.4°

6.87

0.96

6.53

3.1

0.9368

3.0

3.1

0.9748

255-8

12.7

25

38.1

6.35

7500

2.32

6.86

1.10

6.51

3.8

1.2778

3.7

3.8

1.3295

270-8

16.5

33

49.5

8.25

7000

2.40

6.88

1.10

6.52

5.4

1.7339

5.1

5.4

1.8072

295-8

23

46

69

11.5

6500

2.62

6.86

1.17

6.44

7.1

2.6134

6.7

7.1

2.7358

325-8

33

66

99

16.5

6000

2.60

6.84

1.38

6.34

9.6

3.9537

9.4

9.6

4.1715

355-8

45

90

135

22.5

5500

2.88

6.83

1.42

6.28

12.8

5.6093

12.5

12.8

5.9339

385-8

56

112

168

28

5000

3.12

6.81

1.63

6.22

17.8

7.8517

17.0

17.8

8.3555

420-8

70

140

210

35

4500

3.46

6.79

1.78

6.14

22.9

10.8175

21.9

22.9

11.5763

455-8

88

176

264

44

4200

4.02

6.78

1.89

6.11

30.0

14.2794

28.2

30.0

15.2998

505-8

120

240

360

60

3800

4.28

6.77

2.41

6.04

40.2

20.9046

36.4

40.2

22.4421

545-8

165

330

495

82.5

3500

4.48

6.75

2.67

5.98

50.4

28.7428

45.0

50.4

30.7848

595-8

210

420

630

105

3200

4.86

6.73

2.88

5.89

67.8

39.5343

59.5

67.8

42.5997

630-8

260

520

780

130

3000

4.98

0.3°

4.93

2.10

4.14

61.8

42.6162

61.2

61.8

46.3697

700-8

340

680

1020

170

2700

5.78

4.91

2.38

4.06

84.9

60.2135

83.1

84.9

65.8083

  

S = 1500 mm

 

S = 1500 mm

 

S = 1500 mm

  

S = 1500 mm

630-10

340

680

1020

170

3000

3.04

0.2°

5.03

1.40

4.50

94.6

46.9832

94.4

94.6

50.5520

700-10

430

860

1290

215

2700

3.60

5.02

1.58

4.45

135

72.3106

132

135

77.9729

760-10

550

1100

1650

275

2500

3.70

4.98

1.60

4.30

173

91.7589

180

173

101.228

860-10

770

1540

2310

385

2200

4.82

4.95

1.86

4.21

244

145.230

245

244

160.422

950-10

1050

2100

3150

525

2000

5.40

4.91

1.92

4.09

325

204.443

338

325

227.957

1035-10

1450

2900

4350

725

1850

5.78

4.88

1.95

3.97

426

292.140

455

426

326.930



The permitted shaft misalignments ΔKa, ΔKr and ΔKw are maximum values and must not occur at the same time (see following table).
The specified, permitted shaft misalignment ΔKr for types NEN/NHN and MFEFM/MFHFM applies to a shaft distance of S = 1000 mm (ARC-8) or S = 1500 mm (ARC-10).
The permitted shaft misalignment ΔKr for types NEN and NHN is calculated as follows: ΔKr = (S – S1) · tan(ΔKw).
The permitted shaft misalignment ΔKr for types MFEFM and
MFHFM is calculated as follows:
ΔKr = (S – S1 – 2 · BF) · tan(ΔKw).

The values for torsional stiffness apply to the complete coupling. In the case of types NHN and MFHFM to a coupling with shaft distance S = 1000 mm (ARC-8) or S = 1500 mm (ARC-10). The torsional stiffness of the plate packs applies to the rated coupling torque TKN. To determine the torsional stiffness for a specific operating point, e.g. for calculating torsional vibration, the manufacturer must be consulted.

TKmax permitted only five times per hour.

Permitted shaft misalignments

Size

Permitted angular misalignment ±ΔKw

 

0.0°

0.1°

0.2°

0.3°

0.4°

 

Permitted axial misalignment ±ΔKa in mm

225-8

1.94

1.46

0.97

0.48

0.00

255-8

2.32

1.74

1.16

0.58

0.00

270-8

2.40

1.80

1.20

0.60

0.00

295-8

2.62

1.96

1.31

0.66

0.00

325-8

2.60

1.95

1.30

0.65

0.00

355-8

2.88

2.16

1.44

0.72

0.00

385-8

3.12

2.34

1.56

0.78

0.00

420-8

3.46

2.59

1.73

0.86

0.00

455-8

4.02

3.01

2.01

1.00

0.00

505-8

4.28

3.21

2.14

1.07

0.00

545-8

4.48

3.36

2.24

1.12

0.00

595-8

4.86

3.65

2.43

1.22

0.00

630-8

4.98

3.32

1.66

0.00

 

700-8

5.78

3.85

1.93

0.00

 

630-10

3.04

1.52

0.00

  

700-10

3.60

1.80

0.00

  

760-10

3.70

1.85

0.00

  

860-10

4.82

2.41

0.00

  

950-10

5.40

2.70

0.00

  

1035-10

5.78

2.89

0.00