ARPEX ARS-6 series

Coupling can be designed for potentially explosive environments.

Область применения

ARPEX couplings of the ARS-6 series are a versatile coupling solution which thanks to standard modular components can be used for most drive requirements at a low to medium speed. Torques of between 170 and 106000 Nm can be transmitted at a permitted angular misalignment of 0.7°. The open flange form is regarded as very easy to fit and has easily accessible screw connection points. On most types, the intermediate spacer can be radially fitted without moving the connected units.

Main areas of application for the ARS-6 series:

Paper-making machines
Printing machines
Compressors
Pumps
Fans and blowers
Film and foil machines
Generators
Presses
Metalworking machines
Conveyors
Crane systems
Textile machines
Plastics processing machines
Centrifuges

Дизайн

The classic design of an ARPEX couplings of the ARS-6 series is shown in the following illustration. The plate packs are bolted alternately between the flanges of the coupling hubs and the intermediate spacer. Up to size 280-6 close-fitting bolts and from size 305-6 conical screw connections are used for fastening. A large number of intermediate spacer and shafts, hubs and flanges can be combined and thus cover a large number of possible drive requirements.

Design of an ARPEX coupling, ARS-6 series, type NEN

Variants of the ARPEX coupling, ARS-6 series

Types
NEN, BEN, BEB	Variant with standard intermediate spacer, many sizes available from stock
NON, BON	Variant with shortest intermediate spacer
NUN, BUN, BUB	Variant with split intermediate spacer
NHN	Variant with intermediate spacer for customer-specific shaft distance
NZN	Variant with reinforced intermediate spacer
NWN	Variant with intermediate shaft

All coupling types can be very easily combined with further standard components in the ARPEX modular system. Jumbo hubs are used to permit larger maximum bores.
Clamping hubs transmit torque by friction without the use of parallel keys. F, D and C flanges offer many different possibilities for flange connection.

The coupling parts of the ARPEX ARS-6 series are machined on all sides. Exceptions are H and Z spacers and intermediate shafts. The spacers are delivered with unmachined, primed spacer tube.

Higher torques and maximum speeds with similar coupling outer diameters DA can be achieved with the ARPEX ARC-8/-10 series.

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 ARS-6 series are outstanding for their versatility. Most standard components are available from stock, resulting in short delivery times. Their use in potentially explosive environments in accordance with Directive 94/9/EC is possible.

Технические данные

Power ratings

Size	Rated torque	Maximum torque	Overload torque	Fatigue torque	Maximum speed	Maximum permitted shaft misalignment					Torsional stiffness
DA	T_KN	T_Kmax	T_KOL	T_KW	n_Kmax	±ΔK_a	±ΔK_w	±ΔK_r			C_Tdyn
								NHN NZN NWN	NEN/BEN BEB/NUN BUN/BUB	NON BON	NEN BEN/BEB	NUN BUN/BUB	NON BON	NHN	NZN	NWN
	Nm	Nm	Nm	Nm	rpm	mm		mm	mm	mm	MNm/rad	MNm/rad	MNm/rad	MNm/rad	MNm/rad	MNm/rad
78-6	170	320	510	85	13400	1.10	0.7°	12.1	0.57	0.53	0.05	0.04	0.05	0.012	0.032	0.05
105-6	270	510	810	135	10000	1.80		12.1	0.88	0.53	0.09	0.09	0.09	0.024	0.070	0.09
125-6	490	930	1470	245	8400	2.02		12.1	1.04	0.68	0.17	0.17	0.18	0.043	0.141	0.19
140-6	700	1330	2100	350	7500	2.40		12.1	1.28	0.72	0.22	0.22	0.24	0.066	0.203	0.25
165-6	1250	2370	3750	625	6350	2.74		12.0	1.49	0.84	0.33	0.34	0.36	0.114	0.317	0.39
175-6	2000	3800	6000	1000	6000	2.86		12.0	1.55	0.98	0.48	0.50	0.52	0.196	0.443	0.57
195-6	3000	5700	9000	1500	5350	3.06		12.0	1.55	0.98	0.67	0.69	0.73	0.302	0.614	0.79
210-6	4400	8300	13200	2200	5000	3.14		12.0	1.77	1.10	0.77	0.78	0.82	0.352	0.669	0.88
240-6	5700	10800	17100	2850	4350	3.70		12.0	1.93	1.20	1.24	1.26	1.32	0.568	1.04	1.40
255-6	7600	14400	22800	3800	4100	3.84		11.9	2.09	1.50	1.39	1.42	1.46	0.697	1.22	1.57
280-6	10000	19000	30000	4600	3750	4.18		11.9	2.53	1.53	1.55	1.57	1.65	0.881	1.42	1.73
305-6	12000	21000	36000	5000	3400	4.46		11.9	2.72	1.80	2.83	2.87	3.05	1.51	2.71	3.32
335-6	18000	32000	54000	7500	3100	4.84		11.9	2.88	1.89	3.85	3.92	4.14	2.11	3.62	4.49
372-6	24000	43000	72000	10000	2800	4.98		11.8	3.03	2.16	5.72	5.84	6.12	3.14	–	6.75
407-6	34000	61000	102000	14000	2550	5.50		11.8	3.31	2.26	7.25	7.42	7.79	5.06	–	8.51
442-6	43000	77000	129000	18000	2350	6.02		11.8	3.59	2.48	10.0	10.2	10.8	7.42	–	11.9
487-6	55000	99000	165000	23000	2150	6.80		11.7	4.09	2.64	11.7	11.9	12.7	9.25	–	13.6
522-6	69000	124000	207000	29000	2000	7.34		11.7	4.35	2.86	14.0	14.3	15.1	11.4	–	16.2
572-6	92000	166000	276000	38000	1800	7.86		11.6	4.87	3.02	17.9	18.3	19.4	15.2	–	20.7
602-6	106000	191000	318000	44000	1700	8.24		11.6	5.13	3.24	21.1	21.7	22.9	18.2	–	24.5

The permitted shaft misalignments ΔK_a, ΔK_r and ΔK_w are maximum values and must not occur at the same time (see following table).

The permitted shaft misalignment ΔK_r for types NHN, NZN and NWN applies to a coupling with shaft distance S = 1000 mm.

For other shaft distances the permitted radial misalignment can be determined with the following formula:
ΔK_r = (S – S1) · tan (ΔK_w).
The shaft distance S is shown on the table for the type.

T_Kmax permitted only five times per hour.

The values for torsional stiffness apply to the complete coupling. In the case of types NHN and NZN to a coupling with shaft distance S = 1000 mm. In the case of type NWN, the torsional stiffness applies to a coupling without intermediate or torsion shaft. The torsional stiffness of the plate packs applies to the rated coupling torque T_KN. To determine the torsional stiffness for a specific operating point, e.g. for calculating torsional vibration, the manufacturer must be consulted.

Permitted shaft misalignments

Size	Permitted angular misalignment ±ΔK_w
	0.0°	0.1°	0.2°	0.3°	0.4°	0.5°	0.6°	0.7°
DA	Permitted axial misalignment ±ΔK_a in mm
78-6	1.10	0.94	0.79	0.63	0.47	0.31	0.16	0.00
105-6	1.80	1.54	1.29	1.03	0.77	0.51	0.26	0.00
125-6	2.02	1.73	1.44	1.15	0.87	0.58	0.29	0.00
140-6	2.40	2.06	1.71	1.37	1.03	0.69	0.34	0.00
165-6	2.74	2.35	1.96	1.57	1.17	0.78	0.39	0.00
175-6	2.86	2.45	2.04	1.63	1.23	0.82	0.41	0.00
195-6	3.06	2.62	2.19	1.75	1.31	0.87	0.44	0.00
210-6	3.14	2.69	2.24	1.79	1.35	0.90	0.45	0.00
240-6	3.70	3.17	2.64	2.11	1.59	1.06	0.53	0.00
255-6	3.84	3.29	2.74	2.19	1.65	1.10	0.55	0.00
280-6	4.18	3.58	2.99	2.39	1.79	1.19	0.60	0.00
305-6	4.46	3.82	3.19	2.55	1.91	1.27	0.64	0.00
335-6	4.84	4.15	3.46	2.77	2.07	1.38	0.69	0.00
372-6	4.98	4.27	3.56	2.85	2.13	1.42	0.71	0.00
407-6	5.50	4.71	3.93	3.14	2.36	1.57	0.79	0.00
442-6	6.02	5.16	4.30	3.44	2.58	1.72	0.86	0.00
487-6	6.80	5.83	4.86	3.89	2.91	1.94	0.97	0.00
522-6	7.34	6.29	5.24	4.19	3.15	2.10	1.05	0.00
572-6	7.86	6.74	5.61	4.49	3.37	2.25	1.12	0.00
602-6	8.24	7.06	5.89	4.71	3.53	2.35	1.18	0.00