Flexible couplings BIPEX series

BIPEX couplings are torsionally flexible with low torsional backlash. They are outstanding for their particularly compact construction. BIPEX couplings link machine shafts.

BIPEX couplings are specially suited for electric motor drives which are well aligned and have uniform torque loads.

Область применения

The BIPEX coupling is available as a catalog standard in 13 sizes with rated torque of between 13.5 Nm and 3700 Nm.
The coupling is suitable for ambient temperatures of between –30 °C and +80 °C.

BIPEX couplings are particularly suited for electric motor drives which have a uniform torque load and are well aligned. BIPEX couplings are frequently fitted and used in motor bell housings.

Дизайн

BIPEX couplings of types BWN, BWT and BNT each comprise two hub parts connected by a cam ring of elastomer material.

Type BWN

Type BWT

Type BNT

The couplings are inserted during fitting. The hubs are connected to the respective shafts via Taper clamping bushes or finished bores with parallel keyway connection.
BIPEX couplings are positive-locking and torsionally flexible thanks to the polyurethane cam ring. Shaft misalignment will result in deformation of the cam ring.

Coupling materials:

Hubs: EN-GJL-250
Cam ring: PU 92 ShoreA –30 °C bis +80 °C

Types of BIPEX coupling

Type	Description
BWN	Coupling as a shaft-to-shaft connection with drilled and grooved hubs
BWT	Coupling as a shaft-shaft connection with Taper clamping bushes
BNT	Coupling as a shaft-shaft connection with drilled and grooved hubs and a Taper clamping bush

The coupling comprises the following:

Cam ring
2 hub parts with identical cams. The hub parts are designed with a bore and keyway to DIN 6885 or with a taper bore for mounting a Taper clamping bush.

Fitting the clamping bush connects the hub firmly to the machine shaft. In the case of part 4 the Taper clamping bush is inserted from the machine housing side. If there is insufficient space, the Taper clamping bush cannot be fitted from this side. Besides space for fitting the Taper clamping bush, space for the fitting tool (offset screwdriver) must be taken into consideration. In the case of part 3 the Taper clamping bush is inserted from the shaft end face side. The hub must be fitted before the machines to be connected are pushed together.

Особенности

BIPEX couplings are suitable for mounting horizontally, vertically or at any desired angle. The coupling parts can be arranged as required on the shaft extensions to be connected.

The cam ring is mounted with low backlash and achieves progressive torsional stiffness, i.e. torsional stiffness increases in proportion to capacity utilization.

The BIPEX coupling is fail-safe, i.e. if the cam ring is worn, the cast cams of the coupling hub provide for emergency operation.

Технические данные

Power ratings

Size	Rated torque	Maximum torque	Overload torque	Fatigue torque	Maximum speed	Torsional stiffness at 50 % capacity utilization	Assembly Gap dimension	Permissible shaft misalignment at speed n = 1500 rpm ¹⁾
	T_KN	T_Kmax	T_K0L	T_KW	n_max	C_{Tdyn 50 %}	ΔS	ΔK_a	ΔK_r	ΔK_w
	Nm	Nm	Nm		rpm	Nm/rad	mm	mm	mm	Degrees
43	13.5	40.5	54	2.7	5000	1160	0.5	0.25	0.08	0.1
53	24	72	96	4.8	5000	2100	0.5	0.25	0.09	0.1
62	42	126	168	8.4	5000	3500	0.5	0.25	0.11	0.1
72	75	225	300	15	5000	6100	0.5	0.25	0.12	0.1
84	130	390	520	26	5000	9600	0.5	0.25	0.14	0.1
97	220	660	880	44	5000	15800	1.0	0.5	0.16	0.1
112	360	1080	1440	72	5000	23100	1.0	0.5	0.19	0.1
127	550	1650	2200	110	5000	37000	1.0	0.5	0.21	0.1
142	800	2400	3200	160	4900	57000	1.0	0.5	0.24	0.1
162	1250	3750	5000	250	4200	85000	1.0	0.5	0.27	0.1
182	1750	5250	7000	350	3800	127000	1.0	0.5	0.30	0.1
202	2650	7950	10600	530	3400	171000	1.0	0.5	0.34	0.1
227	3700	11100	14800	740	3000	285000	2.0	1.0	0.38	0.1

¹⁾ The maximum speed of the respective type must be noted. For further information on permissible shaft misalignment, please see the operating instructions.

Torsional stiffness and damping

The values stated in the above table apply to a capacity utilization of 50 %, an excitation amplitude of 10 % T_KN 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.

C_Tdyn = C_{Tdyn 50 %} · FKC

	Capacity utilization T_N/T_KN
	20 %	40 %	50 %	60 %	70 %	80 %	100 %
Correction factor FKC	0.7	0.9	1.0	1.1	1.25	1.4	1.7

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!

ΔK_perm = ΔK₁₅₀₀ · FKV

	Speed in rpm
	500	1000	1500	3000
Correction factor FKV	1.20	1.10	1.0	0.70

The axial misalignment may occur dynamically at frequencies up to 10 Hz. For fitting, a maximum gap dimension of S_max = S + ΔS and a minimum gap dimension of S_min = S – ΔS are permitted.

Shaft misalignments ΔKa, ΔKr and ΔKw may occur simultaneously.