JN Diaphragm coupling

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JN Double Diaphragm coupling

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Series JN diaphragm coupling is a structural variety of the series JM. It enlarges the application fields of series JM. Under shorter shaft head spacing conditions, series JN can have the superior features such as easy to mounting, strong adjustment capacity, and smooth transmission etc of series JM diaphragm coupling. It can widely replace the elastic plug coupling, elastic sleeve plug coupling, plum blossom elastic coupling, these old fashion couplings have big noise and are easy to damage. The series JN diaphragm coupling has also the features such as the gravity center near the unit support, small additional bending moment, smaller influence on the rotor dynamic property etc, therefore it is especially suitable for high speed light load unit such as turbo compressor.

For its structural features,see below diagram.

Opposite wheel type     lntermediate plate type

The intermediate plate type diaphragm coupling can greater improve the radial adjustment capacity of the coupling, reduce installation accuracy, the flexibility is stronger, vibration-reducing effect is much better compared to the opposite wheel type coupling.

Opposite wheel type flange       Intermediate plate type flange

　　Viewing from the figure, the flange gravity center of the intermediate plate type coupling is nearer the shaft support, and has more smaller additional bending moment, therefore it can more effectively reduce the influence of the additional bending moment on the shaft and on the bearings, compared to the opposite wheel type coupling.
 

Model JN	Rated torque Nm	Max allowable speed RPM	Standard overall connection dimension					Allowable deviation			Dynamic characteristic		Weight` Kg
			D mm	d3max mm	D′max mm	L mm	T mm	Angular（Degree）	Radial mm/mm	Axial mm	Rotary lnertia N.m/rad	Torsional rigidity kg.m2
100	170	340	104	28	60	35	62.5	1/2	0.0087	1.5	0.0041	0.2×106	3.3
120	320	640	124	32	64	62	70.2		0.0087	1.7	0.0094	0.25×106	5.4
140	400	800	140	55	88	82	69	1/3	0.0056	2.1	0.0126	0.34×106	6.2
170	700	1400	170	70	108	112	82		0.0056	2.5	0.0499	0.85×106	15.8
200	1000	2200	200	80	124	142	96		0.0056	2.8	0.1051	1.29×106	24.7
240	2500	5000	240	105	166	172	104		0.0056	3.2	0.2787	1.79×106	42.9
260	4000	8000	260	110	174	212	119		0.0056	4	0.4532	3.47×106	57.4
290	6300	12600	290	140	190	212	124.6		0.0056	4.7	0.644	3.97×106	63.2
330	10000	19000	330	150	224	252	143	1/4	0.0046	5	1.5072	4.66×106	113.6
380	16000	28000	380	180	265	252	160		0.0046	5.8	2.982	13×106	167
420	25000	36000	420	200	290	302	166		0.0046	6.2	4.8767	19.8×106	228.6
460	40000	64000	460	220	318	352	191		0.0046	7	7.3935	21.37×106	281.5
500	63000	80000	500	250	366	410	195		0.0046	8.5	10.9671	24.26×106	354.1

Note: The axial misalignment capacity means the axial adjustment capacity at 0.45 times of the max speed.

related navigation:
JM Diaphragm coupling　 JMB Diaphragm coupling 　HS Diaphragm coupling 　 PM Diaphragm coupling
MB Diaphragm coupling 　 SM Diaphragm coupling　JN Diaphragm coupling 　 JT Diaphragm coupling
SHM Diaphragm coupling　DM Diaphragm coupling

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