Fluid Coupling

A fluid coupling or hydraulic coupling is a hydrodynamic or ‘hydrokinetic’ device used to transmit rotating mechanical power. It is employed in automotive transmissions in lieu of mechanical clutches. It is also used in industrial and marine machine drives in which it is possible to control the speed of operation and starting-up without shock loading of the transmission power system are vital.

Fluid Coupling Characteristics

-Improve the starting capability of the electric motor

-Protect the motor against overloading, damp shock, load fluctuation, and torsional vibration

-Balance and load distribution in case of multi-motor drives

Applications of Fluid Coupling

Fluid couplings have a wide range of applications in various fields such as

-Belt conveyors

-Scraper conveyors

-Conveyors of all kinds Bucket elevators, ball mills, hoisters, crushers, excavators, mixers, straighteners, cranes, etc.

Check more about Fluid Coupling applications.

Technical Data Sheet of Constant Filling Fluid Couplings

Item no.	600 (r/min)	750 (r/min)	1000 (r/min)	1500 (r/min)	3000 (r/min)	Lquid（L）	Weight（KG)
YOX-190				0.6-1.1	4.5-9.0	0.4-0.8	8.0
YOX-200				0.75-1.5	5.5-11	0.5-1.0	9.5
YOX-220			0.4-0.8	1.1-2.2	10-18.5	0.8-1.6	14
YOX-250			0.7-1.5	2.5-5.0	15-30	1.1-2.2	15
YOX-280			1.5-3.0	4.0-7.5	37-60	1.5-3.0	18
YOX-320		1.1-2.2	2.7-5.0	7.5-15	45-0	2.5-5.0	28
YOX-340		1.6-3.0	3.0-7.0	11-22	45-80	3.0-6.0	30
YOX-360		2.0-3.8	4.5-9.0	15-30	50-100	3.5-7.0	46
YOX-400		3.0-6.0	7.5-15	22-45	80-145	4.6-9.0	65
YOX-420		3.5-7	11-18.5	37-60		6.5-12	66
YOX-450		6.1-11	14-28	40-75		6.5-13	70
YOX-500		10-19	26-50	75-132		10-19	133
YOX-560		19-30	45-90	132-250		14-27	158
YOX-600	12-24	25-50	60-120	200-375		24-40	170
YOX-650	23-45	40-80	90-185	280-500		25-46	210
YOX-710	30-60	60-115	150-280			37-60	310
YOX-750	40-80	80-160	200-360			40-80	348
YOX-800	45-90	110-220	280-500			50-95	420
YOX-1000	140-280	270-550				70-140	510

SELECTION:
Without special requirements the following technical data sheet and power chart are used to select the proper size of fluid coupling with oil medium according to the power transmitted and the speed of motor,e,i,the input of the fluid coupling.
When ordering, please specify the dimensions of the shaft ends of lmotor and driven machine(or reducer)including diamenter,tolerance or fit of the shafts (if no tolerance or fit is specified,the bores will be machined th H7),fit length of the shafts,width and depth of the keys (of notice the standard No.enforced). For ordering the fluid couplings with belt pulley,brake puley or othe special requirements please state the technical data in detail.

Types of Fluid Couplings for Sale

YOXz YOXzⅡ YOXzⅢ Fluid Couplings Size and Specification

Fluid Drive Coupling YOXz is a coincidence machine with moving wheel which is in the output point of the coincidence machine and is connected with elastic axle connecting machine (plum blossom type elastic axle connecting machine or elastic pillar axle-connecting machine or even the axle-connecting machine designated by customers). Usually there are 3 connection types.
YOXz is inner wheel driver which has tight structure and the smallest axle size.The fittings of YOXz have a wide usage, simple structure and the size of it has basically be unified in the trade.The connection style of YOXz is that the axle size of it is longer but it is unnecessary to move the electromotive machine and decelerating machine. Only demolish the weak pillar and connected spiral bolt can unload the coincidence machine so it is extreme convenient. Customer must offer the size of electromotive machine axle (d1 L1) and decelerating machine axle (d2 L2). The wheel size (Dz Lz C) in the table is just for reference, the actual size is decided by customers.

Select Table of YOXz YOXzⅡ YOXzⅢ Fluid Couplings Size and Specification

Item	D	Dz/Lz	C	d1	L1	d2	L2	L	LⅡ	LⅢ	M
YOX-280	328	200/85	10	35	80	45	90	300	245	230	20
YOX-320	380	200/85	10	40	110	50	110	310	245	280	30×1.5
YOX-360	422	250/105	10	55	110	55	110	360	260	300	30×1.5
YOX-400	465	315/135	10	60	140	65	140	450	260	350	36×2
YOX-450	522	315/135	10	70	140	70	140	505	280	390	42×2
YOX-500	572	400/170	10	85	170	90	170	575	302	410	42×2
YOX-560	642	400/170	10	100	170	110	170	600	366	440	42×2
YOX-600	695	500/210	15	100	170	130	180	670	380	470	48×2
YOX-650	745	500/210	15	120	210	130	250	725	390	440	48×2
YOX-710	815	630/265	15	120	210	130	250	760	460	560	48×2
YOX-750	850	630/265	20	140	250	150	250	800	520	580	56×2

YOXp Type Fluid Couplings Size and Specification

Select Table of YOXp Type Fluid Couplings Size and Specification

Item	D	L	d1（max）	L1	Dp（min）	M
YOXp-190	235	102	25	60	78	16
YOXp-200	240	112	25	70	80	16
YOXp-220	260	175	30	80	80	16
YOXp-250	300	155	38	80	110	16
YOXp-280	328	160	38	100	120	20
YOXp-320	380	170	48	110	130	30×1.5
YOXp-360	422	190	55	120	150	30×1.5
YOXp-400	465	225	65	130	150	36×2
YOXp-450	522	240	70	140	200	42×2
YOXp-500	572	250	85	170	200	42×2
YOXp-560	642	285	100	180	250	42×2
YOXp-600	695	330	100	180	250	48×2
YOXp-650	745	345	120	210	300	48×2

Attention:
the smallest size Dp belt tray can do.the largeat size the dl axle hole can do YOXp type is a connection style of belt tray with hydraulic coincidence machine. The electromotive machine (or decelerating machine) axle directly inserts in the axle hole of the coincidence machine which is suitable in equipment transported by belt.Customer must supply the connection size of electromotive machine axle (d1 L1) and the detailed specification and size of belt tray.

YOXm Type Fluid Couplings Size and Specification

Hydraulic Fluid Coupling YOXm is one that the axle of decelerating machine directly inserts in the axle hole of coincidence machine and the electromotive machine point ML(GB5272-85) connects with plum blossom type elastic axle connecting machine. It is reliable connected and has simple structure, the smallest axle size which is a common connection type in current small coincidence machine.
Customer must supply the size of electromotive machine axle (d1 L1) and decerating machine axle (d2 L2) as shown in the picture, others if customer do not supply, we will manufacture according to the sizes in the table.

Attention: L in the table is the smallest axle size.If lengthen the L1,the total length of L will be added.d1,d2are the largest size that we can do.

YOXm Fluid Coupling

Select Table of YOXm Type Fluid Couplings Size and Specification

Item no.	D	L（min）	d1（max）	L1	d2（max）	L2	M（拆卸螺孔）	M
YOXm-190	235	180	30	60	25	60	16	MT4
YOXm-200	240	180	30	60	30	70	16	MT4
YOXm-220	260	200	36	70	35	70	16	MT5
YOXm-250	300	210	36	70	40	80	16	MT6
YOXm-280	328	240	40	80	45	100	20	MT7
YOXm-320	380	276	48	110	50	110	30×1.5	MT7
YOXm-340	392	282	48	110	42	110	30×1.5	MT8
YOXm-360	422	287	55	110	55	110	30×1.5	MT8
YOXm-400	465	352	60	140	60	130	36×2	MT10
YOXm-420	480	345	65	140	60	140	36×2	MT10
YOXm-450	522	384	75	140	70	140	42×2	MT10
YOXm-500	572	426	80	170	90	170	42×2	MT11
YOXm-560	642	487	100	210	100	175	42×2	MT11
YOXm-600	695	540	100	210	100	180	48×2	MT12
YOXm-650	755	522	130	210	120	210	48×2	MT12
YOXm-710	815	580	130	210	130	210	48×2	MT12
YOXm-750	850	603	140	250	140	250	56×2	MT12
YOXm-1000	1130	735	150	250	150	250	56×2

YOXe YOXf Fluid Couplings Specification and Size

YOXf is a type of fluip coupling connected both sides, the axle size of which is longer. But it has simple structure and it is more easy and convenient for fixing and amending (unnecessary to move the electromotive machine and decelerating machine but only the elastic pillar and connecting spiral bolt can unload the coincidence machine).
The relevant elastic axle connecting machine, connecting size and outer size is basically the same with YOXe type.

Select Table of YOXe YOXf Fluid Couplings Specification and Size

Item no.	D	L(min)		d1(max)	L1(max)	d2(max)	L2(max)	Coupling Specification
Item no.	D	Le	Lf	d1(max)	L1(max)	d2(max)	L2(max)	Coupling Specification
YOXf-250	300	210	210	35	80	35	80	TL4 HL2
YOXf-280	328	230	230	35	80	35	80	TL4 HL2
YOXf-320	380	300	280	48	110	48	110	TL6 HL3
YOXf-360	422	350	300	55	110	48	110	TL6 HL3
YOXf-400	465	390	350	60	140	60	140	TL7 HL4
YOXf-450	522	415	390	75	140	65	140	TL8 HL5
YOXf-500	572	450	410	85	170	85	170	TL9 HL6
YOXf-560	642	525	440	90	170	85	170	TL10 HL6
YOXf-600	695	550	470	100	170	110	210	TL10 HL7
YOXf-650	745	600	440	110	210	110	210	TL11 HL7
YOXf-710	815	600	560	120	210	125	210	TL11 HL8
YOXf-750	850	650	580	140	250	140	250	TL12 HL9
YOXf-800	908	700	580	150	250	160	300	TL12 HL10
YOXf-1000	1130	750	750	180	300	180	300	TL13 HL11

Fluid Couplings Advantages and Disadvantages

There are a variety of advantages and disadvantages to hydrodynamic fluid couplings may be discussed. One of them is that the fluid drive coupling could restrict the amount of torque that is transmitted through the motor. This is due to the fact that motors’ output torque the motor will be restricted when the output and input speed are the same.

Another advantage in fluid coupling is it can provide an absorption mechanism for shock of a mechanical nature. This is particularly important in situations where shock loads are encountered. For example, conveyors in mines carry many tons of materials each day. If the load gets excessively heavy, there will be an increase in wear and wear and tear on the drive assembly.

Another benefit for the use of a fluid coupling system is the fact that it gives soft starting. This helps reduce stress on the machine and also stop the coupling from cracking. The fluid coupling may be utilized to transfer the greatest torque that is possible.

The disadvantage for the fluid coupling is it could need more maintenance. This could include inspecting the fluid in the coupling and in the components. The manufacturer could also suggest altering the viscosity. The fluid used for a fluid coupling may differ according to the load, operating conditions, and also the casing of the fluid.

China Fluid Couplings

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