ARPEX ARP-6 series Siemens

Область применения

ARPEX series ARP-6 couplings have been specially developed for pump drives and specifically for centrifugal pump drives. Special care was taken to meet the requirements of API 610 and API 671 (API = American Petroleum Institute). Power is transmitted via close-fitting bolts and nuts from size 310-6 with conical screw connection and plate packs in hexagonal design. Torques of between 100 and 17000 Nm can be transmitted at a permitted angular misalignment of 0.7°. The closed flange shape and a compact construction permit high peripheral speeds and high speeds. The intermediate spacer can be fitted radially without moving the connected units.

Main areas of application for the ARP-6 series:

Centrifugal pumps
Boiler feed pumps
Propeller pumps
Wing pumps
Pipeline pumps
Turbo compressors
Screw compressors
Turbo blowers
Axial, radial blowers
Rotary-piston blowers
Fans

Обзор

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

Дизайн

NAN: The design of an ARPEX NAN coupling of the ARP-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 298-6 close-fitting bolts and from size 325-6 conical screw connections are used for fastening. The intermediate spacer is available from stock in various fixed lengths. Hubs are designed with threaded pull-off holes.

MCECM: The design of an ARPEX MCECM coupling of the ARP-6 series is shown in the following illustration. Bolted between two hubs is the CEC transmission unit, the preassembled plate packs of which are bolted alternately between flanges and intermediate spacer. Up to size 275-6 close-fitting bolts and from size 310-6 conical screw connections are used for fastening. The intermediate spacer is available from stock in various fixed lengths. Jumbo hubs for large bore diameters can be optionally used.

Design of the ARPEX coupling, ARP-6 series

Variants of the ARPEX coupling, ARP-6 series

Types
NAN	Variant with intermediate spacer, various fixed lengths available from stock
MCECM	Variant with preassembled intermediate unit and spacer machined on all sides, various fixed lengths available from stock

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 ARP-6 series are outstanding for their application-optimized construction. The two types NAN and MCECM have been specially designed for drives with uniform to medium loads and at the same time meet the requirements of API 610. The type MCECM with preassembled CEC intermediate unit can also be optionally designed to API 671. A special catcher device serves to secure the intermediate spacer in the event of plate breakage. Their use in potentially explosive environments in accordance with Directive 94/9/EC is possible.

Технические данные

Power ratings, type NAN

Size	Rated torque	Maximum torque	Overload torque	Fatique torque	Maximum speed	Maximum permitted shaft misalignment							Torsional stiffness
	T_KN	T_Kmax	T_KOL	T_KW	n_Kmax	±ΔK_a	±ΔK_w	±ΔK_r					C_T
								S = 100 mm	S = 140 mm	S = 180 mm	S = 200 mm	S = 250 mm	S = 100 mm	S = 140 mm	S = 180 mm	S = 200 mm	S = 250 mm
	Nm	Nm	Nm	Nm	rpm	mm		mm	mm	mm	mm	mm	MNm/rad	MNm/rad	MNm/rad	MNm/rad	MNm/rad
88-6	190	270	450	70	21700	1.10	0.7°	1.15	1.64	–	–	–	0.04	0.04	–	–	–
115-6	270	410	680	110	16600	1.81		1.15	1.64	2.13	–	–	0.09	0.09	0.08	–	–
135-6	580	870	1450	230	12700	2.02		1.14	1.62	2.11	–	–	0.21	0.19	0.17	–	–
150-6	660	100	1650	270	11400	2.41		1.14	1.62	2.11	2.36	2.97	0.27	0.25	0.24	0.23	0.21
176-6	1220	1900	3100	490	9750	2.75		1.11	1.6	2.09	2.33	2.94	0.44	0.40	0.38	0.36	0.34
185-6	1875	2900	4700	750	9300	2.85		1.09	1.58	2.06	2.31	2.92	0.56	0.52	0.49	0.47	0.44
212-6	2850	4230	7200	1200	8100	3.06		1.10	1.59	2.08	2.32	2.93	0.81	0.75	0.70	0.67	0.62
225-6	4200	6300	10500	1700	7650	3.14		–	1.59	2.08	2.32	2.93	–	0.85	0.81	0.79	0.74
256-6	5750	8700	15000	2300	6700	3.69		–	1.56	2.05	2.3	2.91	–	1.37	1.31	1.29	1.22
272-6	8050	12000	20000	3200	6300	3.85		–	1.51	2	2.25	2.86	–	1.44	1.39	1.36	1.3
298-6	10000	15000	25000	4000	5150	4.19		–	1.47	1.95	2.2	2.81	–	1.47	1.43	1.41	1.37
325-6	12000	18000	30000	4800	4700	4.45		–	–	1.93	2.17	2.79	–	–	2.48	2.44	2.34

Power ratings, type MCECM

Size	Rated torque	Maximum torque	Overload torque	Fatique torque	Maximum speed	Maximum permitted shaft misalignment							Torsional stiffness
	T_KN	T_Kmax	T_KOL	T_KW	n_Kmax	±ΔK_a	±ΔK_w	±ΔK_r					C_T
								S = 100 mm	S = 140 mm	S = 180 mm	S = 200 mm	S = 250 mm	S = 100 mm	S = 140 mm	S = 180 mm	S = 200 mm	S = 250 mm
	Nm	Nm	Nm	Nm	rpm	mm		mm	mm	mm	mm	mm	MNm/rad	MNm/rad	MNm/rad	MNm/rad	MNm/rad
64-4	100	150	250	40	22500	0.80	0.7°	0.78	1.27	–	–	–	0.009	0.008	–	–	–
96-6	210	310	530	85	19900	1.15		0.78	1.27	–	–	–	0.06	0.05	–	–	–
120-6	490	740	1250	200	15900	1.47		0.65	1.14	1.62	–	–	0.17	0.15	0.13	–	–
142-6	925	1400	2300	370	13400	1.73		–	1.04	1.53	–	–	–	0.28	0.25	–	–
162-6	1600	2400	4000	640	11800	2.07		–	0.92	1.40	1.65	2.26	–	0.43	0.39	0.38	0.34
190-6	2500	3800	6300	1000	10000	2.36		–	0.93	1.42	1.66	2.27	–	0.71	0.65	0.63	0.57
214-6	3900	5900	9800	1600	8900	2.67		–	0.78	1.27	1.51	2.13	–	1.01	0.94	0.92	0.85
230-6	5200	7800	13000	2100	8300	2.88		–	–	1.25	1.49	2.10	–	–	1.36	1.32	1.22
245-6	7000	10500	18000	2800	7800	2.99		–	–	1.00	1.25	1.86	–	–	1.49	1.45	1.37
275-6	9800	15000	25000	4000	6250	3.38		–	–	–	1.22	1.83	–	–	–	1.65	1.58
310-6	12900	20000	33000	5200	5550	3.85		–	–	–	–	1.64	–	–	–	–	2.96
345-6	17000	26000	43000	6800	5000	4.24		–	–	–	–	1.61	–	–	–	–	4.12

The permitted shaft misalignments ΔK_a, ΔK_rand ΔK_w are maximum values and must not occur at the same time (see following table). The permitted shaft misalignment ΔK_r applies to the shaft distance S specified in each case.

The values for torsional stiffness apply to the complete coupling. 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.

T_Kmax permitted only five times per hour.

Permitted shaft misalignments, type NAN

Size	Permitted angular misalignment ±ΔK_w
Size	0.0°	0.1°	0.2°	0.3°	0.4°	0.5°	0.6°	0.7°
	Permitted axial misalignment ±ΔK_a in mm
88-6	1.10	0.94	0.79	0.63	0.47	0.31	0.16	0.00
115-6	1.81	1.55	1.29	1.03	0.77	0.52	0.26	0.00
135-6	2.02	1.73	1.44	1.15	0.86	0.58	0.29	0.00
150-6	2.41	2.06	1.72	1.38	1.03	0.69	0.34	0.00
176-6	2.75	2.36	1.96	1.57	1.18	0.79	0.39	0.00
185-6	2.85	2.45	2.04	1.63	1.22	0.82	0.41	0.00
212-6	3.06	2.63	2.19	1.75	1.31	0.88	0.44	0.00
225-6	3.14	2.69	2.24	1.80	1.35	0.90	0.45	0.00
256-6	3.69	3.16	2.64	2.11	1.58	1.05	0.53	0.00
272-6	3.85	3.30	2.75	2.20	1.65	1.10	0.55	0.00
298-6	4.19	3.59	2.99	2.39	1.80	1.20	0.60	0.00
325-6	4.45	3.82	3.18	2.54	1.91	1.27	0.64	0.00

Permitted shaft misalignments, type MCECM

Size	Permitted angular misalignment ±ΔK_w
Size	0.0°	0.1°	0.2°	0.3°	0.4°	0.5°	0.6°	0.7°
	Permitted axial misalignment ±ΔK_a in mm
64-4	0.80	0.68	0.57	0.46	0.34	0.23	0.11	0.00
96-6	1.15	0.99	0.82	0.66	0.49	0.33	0.16	0.00
120-6	1.47	1.26	1.05	0.84	0.63	0.42	0.21	0.00
142-6	1.73	1.48	1.23	0.99	0.74	0.49	0.25	0.00
162-6	2.07	1.77	1.48	1.18	0.89	0.59	0.30	0.00
190-6	2.36	2.02	1.68	1.35	1.01	0.67	0.34	0.00
214-6	2.67	2.29	1.91	1.53	1.14	0.76	0.38	0.00
230-6	2.88	2.47	2.06	1.65	1.23	0.82	0.41	0.00
245-6	2.99	2.56	2.13	1.71	1.28	0.85	0.43	0.00
275-6	3.38	2.90	2.41	1.93	1.45	0.97	0.48	0.00
310-6	3.85	3.30	2.75	2.20	1.65	1.10	0.55	0.00
345-6	4.24	3.64	3.03	2.42	1.82	1.21	0.61	0.00