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

Fluid Power Coupling
Fluid Coupling

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 CouplingYOXz 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.

Fluid Power Coupling
Hydraulic Fluid Coupling
Hydrodynamic Fluid Coupling

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

Fluid Coupling
Fluid Coupling
Fluid Coupler

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 CouplingYOXm 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.

China Fluid Coupling
China Fluid Coupling

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
Le Lf
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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