WZL drum coupling

Overview of WZL Drum Coupling

The WZL drum coupling is a new type of drum coupling designed to connect the reducer and rotating parts in cranes, conveyors, coal preparation machinery, construction equipment, and other machinery. It features several notable characteristics:

Firstly, it can withstand substantial radial loads and transmit considerable torque. Moreover, this coupling rotates smoothly, facilitating lifting mechanisms, with a maximum angle of up to 3°. Higher installation precision is also advantageous for the coupling’s longevity. Additionally, the unique key accommodated within a spherical surface enhances its robustness and reliability.

Selection Guide for WZL Drum Coupling

When selecting an appropriate WZL drum coupling, it is essential to consider the working level, static torque, and dimensions of the drum and reducer output shafts. Ensure that the static working torque acting on the drum under full load (including the overload factor for test runs) does not exceed the coupling’s maximum radial load-bearing capacity at the corresponding working level, which is usually limited by the reducer’s permissible radial force on the output shaft, generally eliminating the need for further calculations.

The drum connected to the drum coupling can be either welded or cast. The flange connecting to the drum coupling should be machined with keyways for torque transmission, and the flange mating surface must be free of oil during assembly. One end of the drum is supported on the reducer output shaft via the coupling, while the other end is supported by a bearing seat. Since the drum coupling does not accommodate axial displacement, the bearing seat should relieve axial constraints, with a recommended gap of over 3 mm on each side of the bearing.

Additionally, the reducer output shaft should have a stop plate and securing bolts capable of withstanding axial force from the drum. The bolts should be secured with reliable anti-loosening measures.

Maintenance Guidelines for WZL Drum Coupling

The coupling typically uses No. 2 extreme-pressure lithium grease, while No. 3 extreme-pressure lithium grease is recommended for high-temperature conditions. For medium- and heavy-duty applications, lubrication is recommended monthly; for light-duty use, every three months is sufficient. Each model of the coupling has four lubrication ports (threaded M10X1), which should be lubricated in sequence. During each lubrication, the port should be positioned at the bottom until grease overflows from the spherical surface.

Regularly inspect the fastening bolts on the reducer output shaft and the connecting bolts between the coupling and drum. When used and maintained properly, the coupling has a long service life. It is recommended to perform maintenance and replacement during major or intermediate repairs.

The WZL drum coupling is versatile and can be used in other scenarios requiring torque transmission and radial load support. Its compact structure and reliable operation make it an excellent choice in a variety of applications.

Structure of Drum Coupling

Connection Between Drum and Reducer

Types of Drum Connection Methods

The basic parameters and dimensions of the WZL ball hinge drum coupling

Type			WZL01	WZL02	WZL03	WZL04	WZL05	WZL06	WZL07	WZL08	WZL09	WZL10	WZL11	WZL12	WZL13	WZL14	WZL15	WZL16	WZL17	WZL18
Nominal torque (KN.m)			6.3	9	12.5	16	20	25	40	63	80	125	200	315	400	500	630	800	1120	1490
Transmitted torque KN.m		M3	6.3	9	12.5	16	20	25	40	63	80	125	200	315	400	500	630	800	1120	1490
		M4	5.6	8	11.2	14	18	22.4	35.5	56	71	112	180	280	355	450	560	710	1000	1380
		M5	5	7.1	10	12.5	16	20	31.5	50	63	100	160	250	315	400	500	630	900	1250
		M6	4.5	6.3	9	11.2	14	18	28	45	56	96	140	224	280	355	450	560	800	1120
		M7	4	5.6	8	10	12.5	16	25	40	50	80	125	200	250	315	400	500	710	1000
		M8	3.55	5	7.1	9	11.2	14	22.4	35.5	45	71	112	180	224	280	355	450	630	900
Spline INT z×m×30p×6H			15z×3m	18z×3m	22z×3m	27z×3m	18z×5m	22z×5m	26z×5m	30z×5m	34z×5m	38z×5m	26z×8m	30z×8m	34z×8m	38z×8m	44z×8m	50z×8m	44z×10m	56z×10m
K(h9)			250	280	300	320	340	360	400	450	500	530	580	600	640	700	760	860	1020	1100
B1			80	84	92	97	127	137	157	167	182	192	207	222	237	262	287	352	410	430
D1			300	320	340	360	380	400	450	500	550	580	650	680	710	780	850	950	1120	1200
D2(h7)			190	200	220	240	260	280	340	380	420	450	530	560	600	670	730	840	975	1055
D3(h7)			40	50	60	70	80	100	120	140	160	180	190	220	250	280	320	360	400	540
D4(h7)			50	60	70	85	100	120	140	160	180	200	222	254	286	318	366	420	460	580
D5			260	280	300	320	340	360	400	450	500	530	600	630	660	730	800	900	1055	1135
H			12	20						25			30		40			55	60	70
H1			3	3	3	3	4	5	5	6	6	6	7	7	8	8	9	10	15	25
H2			37	39	43	44.5	59.5	63.5	73.5	77.5	85	90	96.5	104	110.5	123	134.5	166	190	190
H3			2	2.5		3.5			4.5	5.5	6		7.5	8	9.5	11	12	13	17	18
L1			30	30	35	40	50	55	70	75	85	95	105	120	135	150	170	220	260	270
L2			18	22	25	25	25	30	35	40	45	45	45	45	45	55	60	60	60	60
L3			22	22	22	22	37	37	37	37	37	37	37	37	37	37	37	52	65	70
n-D6			8-∅14	8-∅18.5					12-∅23					24-∅23	24-∅27.5				24-∅31
Bolt			M12	M16	M16	M16	M16	M16	M20	M20	M20	M20	M20	M20	M24	M24	M24	M24	M27	M27
n1×a°			1×40	1×40	1×40	1×40	1×40	1×40	2×20	2×20	2×20	2×20	2×20	5×10	5×10	5×10	5×10	5×10	5×10	5×10
Ra			1.6	1.6	2	2	2	2	2.5	2.5	2.5	2.5	2.5	2.5	3	3	3	3	4	4
C			1.6	2	2	2.5	2.5	2.5	3	3	3	4	4	5	5	5	6	6	6	6
Moment of Inertia (kg/m²)			0.13	0.19	0.27	0.37	0.56	0.76	1.65	2.66	4.49	6.18	12.5	16.4	23.13	39.18	29.25	114.5	260.4	337.8
Weight（kg）			21	25	31	36	52	63	99	134	173	209	319	369	432	606	762	1375	2145	2475