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DESCH Conax®-ClutchesType CM - mechanically operatedType CR - slipping clutches
Technology CM 07 - GB
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w h e n f u l l p o w e R i s n e e d e d
Conax®-Friction Clutches
Conax®- Friction Clutch Type CM
The characteristic feature of the Conax®-clutch is the expanding symmetrical friction ring* between the cone-shaped metal discs. It is divided into six seg-ments which are held together by a tension spring. Axial displacements of the shafts are offset in the bore of the
casing when the clutch is disengaged. The contact forces in the system cancel each other out, there is no axial loading of the machine bearings when the clutch is engaged.
Operation of the Conax®-Friction Clutch
When the clutch is being engaged, the sleeve and the deepgroove bearing (17) slide over the clutch levers (5). They press the metal disc (7) against the fric-tion ring* (9) which, as a result, slides outwards evenly until it forms a friction connection with the clutch casing (1) and the flanks of the metal discs (7) and (11). When the clutch is being dis-engaged, the sleeve and the deepgroove bearing (17) release the clutch levers (5). The pressure springs (8) press the metal
Fig. 1 Conax®-Friction Clutch Type CM
discs (7 and 11) apart and the friction ring* segments are pulled inwards by the tension spring (10). As a result the clutch section is completely detached from the casing (1). The clutch is set and re-adjusted by tightening the adjus-ting ring (12), which is secured against turning by the locking screw (19). The segments of the friction ring* are held together by the tension spring up to the speed n
F. The tensile force of the spring
is greater than the centrifugal force of the segments. In order to avoid a residu-al torque when the clutch is disengaged, the speed must be reduced to below n
F
during or shortly after the disengaging operation (see table, page 4). The clutch casing is preferably arranged on the input side. When the clutch hub is loca-ted on the input side, a friction ring*
with an internal spring has to be used if the speed n
F is exceeded. In this case
the friction ring* is in contact with the clutch casing.
* The friction rings are asbestos-free
Fig. 2 Conax®-Slipping Clutch Type CR
Conax®-Slipping Clutch Type CR
The Conax®-slipping clutch type CR is designed to protect machine components against desctruction in the event of overloading or blocking of the driven machine. The Conax®-slipping clutches are manufactured in two basic designs, depending on the size. The sizes 0,5 to 25 are adjusted with a threaded ring. For this purpose the sizes 50 to 200 are provided with disc spring assemblies. Accurate setting of the torque is pos-sible with both designs. The required contact pressure on the friction ring* (9) is produced by means of the adju-sting ring (11) or hexagon nut (17), disc spring (14 or 16) and metal disc (7) and the torque is transmitted by friction. The disc springs (14,16) offset wear over a relatively long path, thus reducing maintenance to a minimum. The clutch is to be set so that it slips when peak loads occur. If a prolonged slipping timer can occur as a result of the machines blocking, it is advisable to provide a monitoring system as per Figs. 21 and 22 (page 10).
Types
CM. - Conax® mech. actuated
CR. - Conax® -slipping clutch
C. F. - Flange to shaft connection
C.W. - Shaft to shaft connection
• Low maintenance, operation-safe, reliable • asbestos-free friction material with long life-time • high heat capacity
• approved design
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Parts of the Conax®-Friction Clutch
Type CM
Fig. 3 Size 1 - 16 (with bearing)
1 Casing2 Socket head screw3 Flanged hub4 Bolt5 Cluch Level6 Key7 Cone disc8 Spring (not in size 1)9 Friction ring: Tension spring type Friction ring: Inner spring ring
10 Tension spring, Inner spring11 Cone disc12 Adjusting ring13 Set screw14 Stop (Key)15 Circlip (Stop ring)16 Clutch hub17 Ball bearing (Coupling sleeve)18 Operation ring (Slip ring)
Parts of the Conax®-Slipping Clutch
Type CR
Fig. 5
1 Casing2 Socket head sceaw3 Flanged hub4 Clutch hub6 Key (Key pin size 0,5)7 Cone disc8 Set screw9 Friction ring 10 Tension spring (Circlip size 0,5)
11 Adjusting ring12 Set screw13 Thrust pad14 Plate pad15 Fitting bolt16 Plate spring17 Hexagon nut18 Adjustment plate29 Set screw
Fig. 4 Size 25 - 50 (with slip ring)
19 Socket head screw21 Ring (Size 8, 16)22 Retaining ring (Hexagon head srew with nut)23 (Grease nipple)24 (Split pin)25 Collar29 Set srew
The designations in brackets are validfor slip ring operation (size 25 – 50)
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Conax®-Friction Clutches
fig. 6 Type CMW size � - �6
fig. 7 Type CMF size � - �6
fig. 8 Type CMW, CMF size �5 - 50
Size TorqueTSNm
max.speed
rpm
operating speednFrpm
C Da DPilot bore
D1)
(H7)
max.
D1Pilot bore
D11)
(H7)
max.
• 1 �00 4000 �900 �� ��5 �0 �0 - �0
• 2 �00 ��80 ��00 �� �5� �4 �5 - �8
• 3 �00 �550 ��00 �5 �95 �8 �5 �8 50
• 5 500 ���0 850 �5 ��5 �8 55 �5 60
• 8 800 �7�0 7�0 �0 �90 �8 65 �8 70
• 16 �600 ��60 6�5 �5 �65 �8 80 �� 90
25 �500 ���5 600 �5 4�0 50 �00 4� ��0
50 5000 �080 �90 �0 460 60 ��0 48 ��0
Size D3 D4 d d1 G G1 K L L1
1 60 �00 6 x M 6 ��,5 9� 45 ��� ��0 90
2 65 ��5 6 x M 6 ��,5 �04 50 ��8 ��5 �0�
3 90 �60 6 x M 8 �6,5 ��9 57 �77 �6� ��5
5 �05 �00 6 x M 8 �6,5 �55 78 ��7 ��� �49
8 ��5 �50 6 x M �0 �6,5 �59 85 �68 ��� �5�
16 �55 ��5 6 x M �� �0,5 �86 �00 �40 �7� �80
25 �85 �55 6 x M �4 �5 �74 ��5 �8� �90 �65
50 ��0 400 6 x M �6 �8 ��4 �6� 4�0 470 ��5
Size L2 I Q S T t X Z(H7)
Operating force on sleeve N
1 �9 �4 �� � 90 �5 �� 90 560
2 �� �4 �6 � �05 �9 �6 ��5 700
3 45 �5 �� � ��4 �6 �9 �48 900
5 60 �7 44 � �60 45 �6 �86 �000
8 75 �8 4� � �85 �4 �8 ��4 ��00
16 90 �5 45 � ��5 �4 �� �95 �800
25 ��0 �0 80 5 �50 85 55 ��5 �600
50 �50 �0 90 5 �00 �00 6� �76 4500
�) The keyways usually are executed to din 6885/ �. Clutch hub executed with � set screw, displaced to the keyway by ��0°, flanged hub with � set screw displaced by �80°.
.
dimensions in mm • Can be delivered ex stock
fig. 9 Type CMW fig. �0 Type CMF
Weights [kg] J = Mass moments of inertia [kgm²]
Size Type Teil
CMw CMf � � 7
1 4,� �,� 0,00� 0,00� 0,00�
2 6,4 5,� 0,005 0,004 0,00�
3 ��,� 8,8 0,0�5 0,0�� 0,0��
5 ��,� �6,� 0,0�7 0,0�5 0,0�6
8 �6,� �5,6 0,097 0,088 0,089
16 65 47 0,�95 0,�74 0,��6
25 ��0 89 0,499 0,7�0 0,508
50 �9� �45 �,0�0 �,5� 0,9�7
All weights and mass moments of inertia refer to max. bore.
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Conax®-Slipping Clutches
fig. �� Type CRW size 0,5 - �5
fig. �� Type CRF size 0,5 - �5
fig. �� Type CRW, CRF size 50 - �00
Size TorqueTÜNm
max.speed
rpm
C Da DPilot bore
D1)
(H7)
max.
D1Pilot bore
D11)
(H7)
max.
D3
• 0,5 60 5400 8 9� 8 �� - �� 40
• 1 ��0 4000 �� ��5 - �0 - �0 60
• 2 �40 ��80 �� �5� - �8 - �8 65
• 3 �60 �550 �5 �95 �8 50 �8 50 90
• 5 600 ���0 �5 ��5 �8 60 �5 60 �05
• 8 960 �7�0 �0 �90 �8 70 �8 70 ��5
• 16 �9�0 ��60 �5 �65 40 90 �� 90 �55
25 �000 ���5 �5 4�0 50 ��0 4� ��0 �85
50 6000 �080 �0 460 60 ��5 48 ��0 ��0
100 ��000 855 �0 580 80 �50 6� �50 �50
200 �4000 700 �0 7�0 90 �80 7� �80 ��0
Size D4 d G G1 K L L1 L2 S Z(H7)
0,5 69,5 6 x M 5 �7 �5 80 60 �4 �5 � 6�
1 �00 6 x M 6 5� �5 ��� 80 50 �9 � 90
2 ��5 6 x M 6 6� 40 ��8 94 60 �� � ��5
3 �60 6 x M 8 7� 47 �77 ��5 68 45 � �48
5 �00 6 x M 8 86 58 ��7 �4� 80 60 � �86
8 �50 6 x M �0 ��� 70 �68 �8� �05 75 � ��4
16 ��5 6 x M �� ��6 96 �40 ��� ��0 90 � �95
25 �55 6 x M �4 �54 �05 �8� �70 �45 ��0 5 ��5
50 400 6 x M �6 �89 ��0 4�0 ��5 �80 �50 5 �76
100 500 6 x M �0 ��� �75 5�6 �86 ��0 �70 6 47�
200 6�0 6 x M �0 �66 �00 670 468 �50 ��0 8 594
dimensions in mm • Can be delivered ex stock
�) The keyways usually are executed to din 6885/ �. Clutch and f langed hub executed with � set screw, displaced to the keyway by �80°.
Weights [kg] J = Mass moments of inertia [kgm²]Mass moments of inertia [kgm²] [kgm²]
Size Type part
CRw CRf 4 5 7
0,5 �,4 �,0 0,0004 0,000� 0,0004
1 4,0 �,9 0,00� 0,00� 0,00�
2 6,0 4,5 0,004 0,004 0,00�
3 �0 7,0 0,0�4 0,0�� 0,0��
5 �9 �4 0,0�� 0,0�� 0,0�6
8 �5 �4 0,09� 0,�09 0,089
16 66 49 0,�98 0,�7 0,��6
25 98 60 0,469 0,68 0,508
50 �65 ��5 0,9�7 �,4� 0,9�7
100 �55 �80 �,6� �,58 �,50
200 5�0 �50 7,�� �0,78 9,69
All weights and mass moments of inertia refer to max. bore.fig. �4 Type CRW fig. �5 Type CRF
5
Operating SystemsMechanically operated
Lever size
Clutch-size
a b c d d1 e F g
g1ap-prox
l l1 l2 m m1 v□ X Weiht ap-prox.kg
1 – 0 � ��0 �5 �8 M �0 �0 �0 70 �6 45 �60 400 ��0 75 �90 50 �� �,8
1 – 0 � ��0 �5 �8 M �0 �0 �0 70 �6 45 �60 400 ��0 75 �90 50 �6 �,8
10 – 0 � �40 40 �5 M �� �5 40 95 �0,5 60 �60 450 4�0 �00 �70 50 �9 9,5
14 – 0 5 �40 40 �5 M �� �0 40 ��7,5 �5 65 �60 600 490 �00 ��0 50 �6 ��
14 – 0 8 �40 40 �5 M �� �0 40 ��7,5 �5 65 �60 600 490 �00 ��0 50 �8 ��
16 – 0 �6 �60 45 �5 M �� �5 50 �45 40 70 �60 750 565 ��0 �65 50 �� �8
fig. �6 Type SH
dimensions in mm
when the clutch is running the lip ring must be free of load. if necessary, the control lever should be supported.
operating forces see page 4.
flexball operating device and other operating systems on request.
Conax®-clutches, type CM in a combined transmission set for bunker boats, inclusively planox®-clutches.
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Operating SytemsPneumatically/ mechanically actuted
fig. �7 Type SPWF
Lever size Clutchsize
a a1 b c d d1 e e1
1 – 0 � ��0 5�0 �5 �8 M �0 �0 �0 85
1 – 0 � ��0 5�0 �5 �8 M �0 �0 �0 85
10 – 0 � �40 6�0 40 �5 M �� �5 40 85
14 – 0 5 �40 6�0 40 �5 M �� �0 40 85
14 – 0 8 �40 6�0 40 �5 M �� �0 40 85
18 – 0 �6 �60 765 45 �5 M �� �5 50 95
21 - 0 �5/ 50 �60 765 45 �5 M �� 40 50 95
Lever size Clutchsize
F F1 g g1 k l2 m m1 m2 X
1 – 0 � 70 ��8 �0 59 M �4 x �,5 �55 75 �90 �05 ��
1 – 0 � 70 ��8 �0 59 M �4 x �,5 �55 75 �90 �05 �6
10 – 0 � 95 �05 �0,5 76 M �8 x �,5 465 �00 �70 �65 �9
14 – 0 5 ��7,5 �55 �5 8� M �8 x �,5 5�5 �00 ��0 �65 �6
14 – 0 8 ��7,5 �55 �5 8� M �8 x �,5 5�5 �00 ��0 �65 �8
18 – 0 �6 �45 ��0 40 86 M �� x �,5 600 ��0 �65 495 ��
21 - 0 �5/ 50 �87,5 400 44 98 M �� x �,5 7�5 ��0 475 495 55
dimensions in mm
hydraulic/ mechanic operating systems on request.
Note: when the clutch is running the slip ring must be free of load. Adjust spring stops accordingly.
7
Selction of Clutch Size
Conax®-Friction ClutchesThe torque values stated can be transmitted under constant loading. however, in the event of varying load condit ions the corresponding operating factors „s“ must be taken into con-sideration: These can be found on page 9 of the catalogue. peak torque loads can occur during engagement or operation dependent on the types of machines being coupled. The clutch size should always be orientated to the maximum load. one should distinguish between the following cases:
�. The clutch has to accelerate an insi -gni f icant mass such that nominal tor -que (TK) is equal to the engaging torque (Ts) with regard to operat ing factor s. TK = Tl · s ≤ Ts [�] TK = · 9550 · s = [nm] [�]
�. The clutch has to transmit a load torque (Tl) during the engagement process itself and to accelerate a large mass. TK = Tl + Ta Ts [�]
TK = · 9550 + = [nm] [4]
Clutches for use with driv ing engines and/ or driven machines with a high coef f icient of cyclic load variation (i.e. piston engines) should be selected according to the specif ic torque requirements (a torque diagram of the application may help). The service fac-tors on page 9 can only serve as reference values. when it comes to the acceleration of large masses or in the case of high shif t frequency, extra attention should be paid to the thermal load on the clutch. for this reason, we would ask you to provide us with information in accordance with points � – �0 so that we can carry out precise calculations with respect to the heat.
�. Type of driv ing machine
(electric motor, diesel engine etc.)
�. output power p [kw/hp]
�. speed of clutch n [rpm]
4. Type of driven machine
5. highest torque on engagement Tl [nm]
6. second degree moment of inertia Jl refer-
red to the clutch output shaft [kgm²]
7. number of clutch engagements per hour sh [�/h]
8. engagement time ts [sec.]
9. Ambient temperature
�0.Type of clutch control required
please ask for detailed questionaire.
Conax®-Slipping Clutches The special construction feature on all Conax® CR models is the elastic pressure of the fric-t ion elements. The following charecteristics have been obtained by f it t ing clutches with plate type springs.
�. limitation of peak torque upon engagement.
�. precise setting and limitation of transmittable torque.
�. self adjustment over a relatively wide range of wear – and therefore minimal maintenance and resetting.
The plate spring characteristic curve can be seen in fig. �8. This means that the clutch torque in the area of the automatic adjust-ment path functions very smoothly.
for the above-mentioned reasons care must be taken when selecting the clutch size to ensure that the plant torque to be protected is as close as possible to the specif ied clutch torque TÜ. if frequent slipping of the clutch is expected, attention must be paid to the ther-mal loading of the clutch. in this case please send us the details according to points �-9.
es bedeuten:
f = power [n]
JA = Moment of inertia - driving parts [kgm²]
Jl = Moment of inertia - driven parts [kgm²]
n = speed [rpm]
p = Capacity [kw]
Q = friction work [J]
s = operating factor
sh = number of engagement per hour [�/h]
Ta = Moment of acceleration [nm]
TK = nominal torque [nm]
Tl = load moment [nm]
Ts = Max. Clutch torque [nm] (see catalogue)
TÜ = Max. Transmitted torque [nm] (see catalogue)
t = slipping time [s]
tB = Acceleartion time [s]
ts = Time of engagement [s]
fig. �8
np
9,55 ·tB n
Jl · np
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Assignment of load characteristics according to type of working machine
ssMMMssM
MMM
MMGMMGM
Ms
MsMGMMMMMGMMMMsMM
MGMMG
sGs
DREDGERSBucket conveyorlanding gear (caterpillar)landing gear (rail)Manoeuvring winchespumpsimpellers Cutter headsslewing gearGENERATORS, TRANSFORMERSfrequency transformersGeneratorswelding generatorsCHEMICAL INDUSTRYCooling drumsMixersAgitators (liquid material)Agitators (semi-liquid material)drying drumsCentrifuges (light)Centrifuges (heavyOIL INDUSTRYpipeline pumpsRotary drilling equipmentCONVEYORSpit-head wincheswinding enginesjointed-band conveyorsBelt conveyors (bulk material)Belt conveyors (piece goods)Band pocket conveyorsChain conveyorsCircular conveyorsload elevatorsBucket conveyors for flourpassenger liftsplate conveyorsscrew conveyorsBallast elevatorsinclined hoistssteel belt conveyorsdrag chain conveyorsBLOWERS,VENTILATORSRotary piston blowersBlowers (axial/radial)Cooling tower fansinduced draught fansTurbo blowersBUILDING MACHINERYhoistsConcrete mixersRoad construction machinery
sMsMs
sMGs
GsGMM
MMMM
MssssMssGMG
GMMGMMsMM
ssMsMsssss
RUBBER MACHINERYextrudersCalendersKneading millMixersRolling millsWOOD WORKING MACHINESBarkersplaning machineswood working machinessaw framesCRANESluffing gear blockTravelling gearhoist gearslewing gearderricking jib gearPLASIC INDUSTRY MACHINESextrudersCalendersMixersCrushersMETAL WORKING MACHINESplate bending machinesplate straightening machineshammersMetal planning machinespressesshearsforging pressespunch pressesCountershafts, line shaftsMachine tools (main drives)Machine tools (auxiliary drives)FOOD INDUSTRY MACHINERYBottling and container filling machinesKneading machinesMash tubspackaging machinesCane crushersCane cuttersCane millssugar beet cutterssugar beet washing machinesPAPER MACHINESCouchesGlazing cylinderspulperpulp grindersCalenderswet presseswillowssuction pressessuction rollsdrying cylinders
sGMss
ssss s s s
MMMMM
sM
sMsssMsssMsMsMMMsMsMssMs
MM
MM
PUMPSpiston pumpsCentrifugal pumps (light liquids)Centrifugal pumps (viscous liquids)plunger pumpspress pumpsSTONE AND CLAY WORKING MACHINESCrusherRotary ovenshammer millsBall millsTube millsBeater millsBrick pressesnTEXTILE MACHINESBatchersprinting and dyeing machinesTanning vatswillowsloomsCOMPRESSORSpiston compressorsTurbo compressorsMETAL ROLLING MILLSplate shearsManipulator for turning sheetsingot pushersingot and slabbing-mill trainingot handling machinerywire drawing benchesdescaling machinesThin plate millsheavy and medium plate millswinding machines (strip and wire)Cold rolling millsChain tractorBillet shearsCooling bedsCross tractorRoller tables (light)Roller tables (heavy)Roller straightenersTube welding machinesTrimming shearsCropping shearsContinuous casting plantRollers adjustment driveManipulatorsLAUNDRIESTumblerswashing machinesWATER TREATMENTAeratorsscrew pumps
Safety factors “S”
Service factor „S“
drivingmachineload symbol of application
u M s
electric motors,Turbines,hydraulic motors
�,� �,6 �,8
piston engines4-6 cylinders �,0 �,5 �,8
piston engines�-� cylinders �,� �,8 �,�
Refernce value of operating factor s
9
Pneumatic Operating SystemClutch Monitoring System
Pneumatically - mechanically actuated
fig. �9 pneumatical - mechanical operating device of a Conax®-clutch, type CM, hand actuated and with automatic release of the operating system:
fig. �0 pneumatical - mechanical operating device of a Conax®-clutch, type CM, with electromagnetically actuated wayvalve and automatic release of the operating system:
we develop and supply operating devices according to the condit ions of operation.
Pneumatic elements
1. Compressed air chamber: Tank in which the compressed air is stored up to a maximum pressure.
2. Maintenance unit: The maintenance unit represents a combination of f il ter, pressure reducing valve and line oiler.
11. Opertaing device
12. Double-actring cylinder
13. Time cut-out value: These values with delay of engagement will release the opera-t ing lever resp. the actuating collar when the clutch is engaged/ disengaged.
14. 4-way-valve: serves for alternating connection of the main air piping to the
conduit controlled and of the latter to the atmosphere.
15. 4-way magnetic valve: serves for alternating connection of the main air piping to the conduit controlled and of the latter to the atmosphere.
fig. �� speed monitoring on the driven side of the clutch fig. �� Measurement of speed on the driving and driven sides of the clutch (measurement of speed dif f ference resp. slip monitoring)
The speed monitor performs the function of a limit speed monitor. if the speed drops below the value set in the operating system, a relay in the operating system will drop out. Acoustic signals, light signals or valves can be connected to this relay for clutch actuation purposes (Model Ch).
details available on request.
The rpm dif ference measuring device tr iggers when the dif ference rpm-set at the amplif ier coupling device is exeeded. The rpm and the corresponding impulses on the drive and power take-of f side are registered by sensors and compared within the amplif ier coupling device. once the pre-set dif ference rpm has been reached, the contactor built into the amplif ier changes over.
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Conax®-Friction ClutchesAdditional types of Conax®-Clutch*
fig. �� Conax®-friction clutch type ChfA hydraulically actuated for universal joint
fig. �4 Conax®-friction Clutch type ChfR hydraulically actuated for universal joint
fig. �5 Conax®-slipping Clutch type CR- f with V-belt pulley
fig. �6 Conax®-slipping Clutch type CR -f combined with highly f lexible coupling
* detailed documentation on request.
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Delivery ProgrammeClutches
Planox®-friction clutchesConax®-friction clutchesCentrex®-centrifugal clutches
Flexible Couplings
Hadeflex®-couplingsHabix®-couplingsOrpex®-couplings DESCH-Flex couplings DESCH-HRC couplings
Rigid Couplings
Press Drives
Lutex®-clutch/ brake combinationsComplete press drives
Gears
Plantery gears Special gears
Complete Transmission Solutions
Flywheel back gears for no-delay units Drive stations for strecher Levelling units Back gears with engageable/ disebgageable clutches
Belt Drives
V-belt pulley drives Timing belt drivesFlat belt drivesV-belt pulley drives with taper bushesV-belt pulley and flywheels to custo-mers specificationBold-on hubsWelded hubs
Bearing
Greased friction bearings
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