Již od roku 1999 jsme dodavatelem převodovek od francouzské firmy CMD (člen skupiny CIF) pro Českou i Slovenskou republiku. Kořeny firmy CMD sahají až d roku 1901, kdy Andre Citroen založil závod na výrobu ozubených převodů v Paříži. Nezávisle na této události vzniká v roce 1920 v Cambrai společnost pana Roberta Messiana a v roce 1922 v městě Nevers společnost Durand vyrábějící šnekové převodovky. Postupnými fúzemi těchto firem dospěla společnost ke své dnešní podobě tj. Citroen – Messian – Durand tedy CMD Engrenages et Réducteurs a je předním světovým dodavatelem celých pohonů, převodovek a spojek.

With decades of experience in supplying the cement industry with kiln and dryer components such as girth gears, pinions, reducers, tires and rollers, Groupe CIF has particular expertise in the defining and supplying of complete gear drive systems for all types of rotary equipment.

 

Our field service personnel have all the necessary skills to carry out on-site measurements and evaluations, and to make technical recommendations as required.

  

Girth gears up to 16 m in diameter;palier-fours
Kiln tires (single, or installed on shell section)
Shafted kiln support rollers
Parallel-shaft reducers
Special gearboxes (Jumborex®, Rollerex®, Millrex®)
Grinding tables
Mill heads
White metal bearings
Kiln and mill shells
LS and HS couplings

Mills

CMD provides complete transmission systems for vertical or horizontal roller mills.
horizontal roller mills
single or double-acting side drive Capacity up to: 10 000 KW from 980 rpm to 14 rpm. Parts include: Pinions(s) with bearings, a gear ring, its casing and lube bank, FLEXIDENT SENIOR, gear couplings with an extension, ERMASTERtwo-train main reduction gear(s), turning gear reduction gear(s) with built-in anti-rotation device, WINFLEX.
central drive
 
Capacity up to 6 500 KW from 980 rpm to 14 rpm. For improved operational safety, the reduction gear is not affected by any Mill distortion. Parts include the extremely high reliabilityJUMBOREX new generation divided torque reduction gear, the FLEXIDENT gear coupling with an extension to drive the Mill shell flange, a turning gear located on the second output side of the main motor or between the main motor and the JUMBOREX, high speedFLEXIDENTgear couplings.
 
vertical roller mills Capacity up to 4 000 KW. Combining performance with robustness, the ROLLEREX PLANETARY or cylindro-conical reduction gear takes in all major milling forces while at the same time ensuring rotational drive of the Mill. Parts also include the dynamically balanced WINFLEX high speed coupling fitted with electrical insulation.
 

Kilns

CMD provides complete transmission systems for KILNS AND DRYERS: Single or double-acting side drive.
CMD proposes engineering of the transmission between the main motor and the shell of the kiln including torsional analysis calculations for the installation.
Parts include: Pinions(s), a gear ring and its attachment system with tangent discs, casing, a lube bank, FLEXIDENT SENIOR, gear couplings, ERMASTERthree-train main reduction gear(s), turning gear reduction gear(s) with built-in anti-rotation device (back stop),WINFLEX couplings.
Drive also produced with BOGIFLEXself-aligning transmission.
Example of capacity produced: 1 440 KW from 1 500 rpm maximum to 4 rpm max with variable speed.

Groupe CIF offers a full range of casting, machining, fabrication, and related services required for the manufacture of key components for grinding mills, crushers, kilns and dryers used in the global mining industry:

 

• Girth gears up to 16 m in diameter;

• Shafted pinions;

• Parallel shaft reducers, couplings and inching drives;

• Segmented mill heads and trunnions;

• Integral mill heads

• Crusher mainframes

• Mill and kiln shells

Mills

CMD provides complete transmission systems for vertical or horizontal roller mills.
horizontal roller mills
single or double-acting side drive Capacity up to: 10 000 KW from 980 rpm to 14 rpm. Parts include: Pinions(s) with bearings, a gear ring, its casing and lube bank, FLEXIDENT SENIOR, gear couplings with an extension, ERMASTERtwo-train main reduction gear(s), turning gear reduction gear(s) with built-in anti-rotation device, WINFLEX.
central drive
 
Capacity up to 6 500 KW from 980 rpm to 14 rpm. For improved operational safety, the reduction gear is not affected by any Mill distortion. Parts include the extremely high reliabilityJUMBOREX new generation divided torque reduction gear, the FLEXIDENT gear coupling with an extension to drive the Mill shell flange, a turning gear located on the second output side of the main motor or between the main motor and the JUMBOREX, high speedFLEXIDENTgear couplings.
 
vertical roller mills Capacity up to 4 000 KW. Combining performance with robustness, the ROLLEREX PLANETARY or cylindro-conical reduction gear takes in all major milling forces while at the same time ensuring rotational drive of the Mill. Parts also include the dynamically balanced WINFLEX high speed coupling fitted with electrical insulation.
 

Kilns

CMD provides complete transmission systems for KILNS AND DRYERS: Single or double-acting side drive.
CMD proposes engineering of the transmission between the main motor and the shell of the kiln including torsional analysis calculations for the installation.
Parts include: Pinions(s), a gear ring and its attachment system with tangent discs, casing, a lube bank, FLEXIDENT SENIOR, gear couplings, ERMASTERthree-train main reduction gear(s), turning gear reduction gear(s) with built-in anti-rotation device (back stop),WINFLEX couplings.
Drive also produced with BOGIFLEXself-aligning transmission.
Example of capacity produced: 1 440 KW from 1 500 rpm maximum to 4 rpm max with variable speed.

Groupe CIF supplies components for sugar extraction processing of beets and cane.

 

For cane milling and crushing, Groupe CIF has designed and developed reduction gearboxes specifically adapted for this type of application.

A complete size range is offered to cover the full breadth of crusher capacities.

 

- Diffuser gears

- Diffuser tires

- Caneflex® and Canemaster®
reduction gearboxes for cane crushers

- Gearboxes for mixers and
crystallizers

- Shafted rollers

Cane sugar mills

The CANEFLEX reduction gear has been specially designed for milling cane sugar. A range of 5 sizes covers all capacities of washers and mills.
The standard CANEFLEX reduction gear is designed for input speeds of between 600 rpm and 1 800 rpm and output speeds of between 3 rpm and 7 rpm .
The output shaft and bearing are designed to take the loads induced by the tail-bar. The CANEFLEX reduction gear is easy to fit – the result of long experience in this field.
  
Diffusion processes

CMD proposes a BOGIFLEX drive system – a self-aligned shaft mounted reduction gear – for vertical and horizontal diffusion processes.
The light, modular drive units allow high torque capacities.
When driving vertical systems, the torque delivered by a BOGIFLEX reduction gear of the BPF type on the ring gear is around 16 kNm to 120 kNm. The input speed variation is from 300 rpm to 1500 rpm.
For the horizontal diffusion tube drive, CMD provides a solution based on BOGIFLEX planetary reduction gears (BFT type). Each reduction gear can accept torques of between 6 kNm and 50 kNm. The output rotation speed of the reduction gear is very slow: between 0.1 rpm and 0.2 rpm.

Groupe CIF supplies numerous parts for power generation equipment and systems used in the safe and reliable distribution of energy.

 

• Wind turbine components

• Coal grinding mill components (vertical or horizontal)

• Turbine housings

• Worm gear sets

• Hydraulic turbine components

• Valve bodies and ball plugs

A full range of high quality and high reliability transmission systems particularly suited to milling for production of energy.

 

Transmission systems for horizontal mills


CMD provides complete transmission systems ranging from 750 kW to 3000 kW and even more, comprising
ring gear and pinion
main reduction gear: ERMASTER
gear coupling: FLEXIDENT
spring coupling: FLEXACIER
turning gear reduction gear: Auximatic with built-in clutch system.
Every item is a high quality item delivered within short lead-times .
Complete planetary reduction gears Rollerex RP 
 Case hardened, tempered and ground gears.
Hydrostatic and hydrodynamic lubrication of the shoes supporting the milling table.
Full range from 150 kW to 3000 kW.
Economical reduction gears of compact design.
 
Transmission systems for vertical mills

CMD manufactures either complete reduction gears or gears included in the production of reducers for vertical roller mills such as Raymond, E Mill, MPS, etc.
 Durand Worm / Wheel torques 
Available centres: 27″, 31″, 36″, 41″, 48″, 54″ for new mills or interchangeable replacement of existing systems for mills in service.
High efficiency worm / wheel gears offered at competitive prices.
Durand complete Worm / Wheel reduction gears 
Wheel/worm reduction gears for Babcock mills up to 600 kW.
 
 » Bevel  » gears
 Cut bevel gears.
Information about cutting and capacity available on demand.
ROLLEREX RC complete cylindro-conical reduction gears 
 Case hardened, tempered and ground gears.
Hydrostatic and hydrodynamic lubrication of the shoes.
Supporting the milling table .
Full range from 250 kW to 2500 kW.
Strong and reliable construction.

Providing expertise and innovative solutions, Groupe CIF is a partner in major industrial projects in the iron and steel industry.

 

In sintering plants, major international producers have selected Bogiflex® and Haflex® drive systems for their operational flexibility and reliability.

 

- Double-helical gears and pinions

metallurgiecmd- Bogiflex® drive system

- Coiler drums (for Steckel mills)

- Custom spacers and couplings

- Pellet cars

- Pinion stands and gearboxes for rolling mills

- Converter and ladle tilting systems

Tightening mill housing
Adjustment of the spacing between the 2 cylinders of the mill housing is ensured through screw/nut systems in which the screws swivel under torque in :
2 worm and wheel reducers to adjust the horizontal housing .
4 worm and wheel reducers to adjust the vertical housing.
Worm and wheel reducers used for tightening rolling mill housing have the following features :
Steel casing.
Hub of slow speed shaft made of steel or GJS cast iron with big bore and 6 or 8 wide parallel side grooves.
Lubrication through oil circulation.
Groove lubrication
Synchronisation of reduction gears is ensured by the means of one drive only and a clutch system to adjust parallelism of cylinders.
Robustness and design of the casing must be compatible with the high torque that is transmitted at the moment of release and with axial efforts generated on the hub of the slow speed shaft by the action of the tightening screw under load.

 

Rolling Mills

Robustness and a high service factor are essential for rolling mill reduction gears. laminoir_rectification CMD’s high performance equipment makes it possible to grind teeth that have beencase hardened and tempered.
A range of couplings has been specially designed to couple reduction gears and rolling mills.
Cage à pignon
Rolling Mill
All kinds of drive:
Hot mill train
Cold mill train
SENDZIMIR rolling mill
KREUSER rolling mill
Circular or shrink-ring rolling mill
 
Converters

Copper: TENIENTE , NORANDA
Steel: AOD, LD, OLP, LD.AC
Tipping of retorts
BOGIFLEX or HAFLEX solution with 2 pinions – Self-alignment of pinions of gear ring
Standard solution with 4 pinions
Transmissible torque : up to 20 150 kNm
 
Sintering plants

chaine_aggloBOGIFLEX and HAFLEX systems have been selected by the world’s leading manufacturers for their operational flexibility and reliability.
Main motion:
Chain drive
Sprocket-wheel or clod-crusher drive
 
Ladle Trucks

BOGIFLEX drive system.
Simplicity and great reliability of the rotational movement.
Easy to fit to the ladle journal.

- Lock or dam handling winches

- Hoisting systems

- Barge hinge components

- Mechanical jacks

Maritime lock doors: lifting or rolling 
Products:
Gearboxes, couplings, inching drive, open gears.
 
Moving and suspension bridges
Products:
« Panama » wheels, helical gearboxes, couplings, bevel gearboxes
 
Dams
Products:
Worm drive unit, pinion, chains, monitoring, twin side gearboxes
Helical drive unit, barrel drum couplings
 
Boat lift
Products:
Main gearboxes, couplings, open gears

Handling

Long Travel
In our DURAND plant, CMD has developed a range of worm reduction gears specifically tailored to driving driving-wheels for cranes and dock equipment  …
High capacity dynamically reversible reduction gears fitted with a hollow shaft and flanged gear brake motor.
 

Conveyors
CMD has developed a range of reduction gears tailored to driving conveyors, loaders, and the plant and equipment used in Cement Plants, Mines, Quarries and for Public Works.
For this application CMD can propose a solution with reduction gears of the ERMASTER type with parallel trains or a bevel gear with a hollow shaft.
Integrated ancillary equipment:
 back stops
turning gears
 

Lifting
Drive units for winch barrels, overhead cranes, gantry cranes, dock cranes and others – with reduction gears providing great reliability and fitted with steel casings.
 
Drive units for cable cars :
Orelle – Francoz Plan Bouchet – Val Thorens
 
Duplication of the main drive system.
Reliability of drive systems for:

46 cars with a capacity of 12 passengers each.
1500 passengers per hour.
Distance: 4942 m at an altitude from 880 m to 2360 m and a speed of 6 m/second.
 
Features of the transmission :

The drive unit has 2 DC electric motors (1500 horse power at 1361 rpm) with a back up drive unit with 1 Diesel engine (500 horse power) with a linear speed of 1.68 m/second.
Nominal torque on PV shaft = 320 000 Nm at 26 rpm with a maximum start-up torque of 500 000 Nm.
Oil splashing lubrication + cooling system.
Transmission includes 1 JUMBOFLEX 900F worm and wheel reducer with a ratio of 61/8 (main reducer) and 2 ERMASTER R2HC38F primary reducers with a ratio of 6.986/1.

Environment

Water Treatment
In the field of water treatment CMD is in a position to intervene at various levels :
Lifting screw

Lifting of raw effluent for preliminary treatment by the means of worm shafts (diameter 1m) with a speed of 1 rpm. Drive is produced with a motor and a parallel train reduction gear of the ERMASTER type.
eRMASTERvertical
Pumping

CMD offers a range of vertical reduction gears designed especially to drive powerful pumps. The reduction gear supports the motor.
 
Sedimentation tanks
Gear motor with vertical slow speed shaft with waterproofing ensured on the PV output through an internal skirt.
Range of devices with torque ranging from 20 000 Nm to 1 000 000 Nm and more.
Extremely high reduction ratio i = 10000/1, … 30000/1,… etc.
Output rotation speed 0.1 rpm.
The slow speed grooved shaft slides in the PV shaft of the reduction gear in order to adjust the height of the scraper in terms of the bottom of the tank and the product.

Electronic torque control ensures the following functions :
Permanent display of tractive force,
4 threshold relay outputs,
4-20 mA output for connection to a controller.
The position of the slow speed shaft is servo-assisted with a motorised actuator for lifting with an axial capacity of 5 to 100 tons, fitted with electrical and mechanical end of travel sensors and a system for viewing the position of the scraper in terms of the bottom of the tank.
 
Household waste incineration plants

Range of gear motors type 315C-125UXCB2403
Driving rollers for household waste incineration furnaces, with a capacity of 7 tonnes per hour, working 7 days a week and 365 days a year.
Power 1.5 kW at 1500 rpm. The drive system is fitted with a variable speed unit and an incremental encoder so that the speed of each roller can be controlled and driven separately.
The reduction gear is designed to have a high reduction ratio 27 644 for an output speed of 0.003 to 0.1 rpm (giving 0.2 to 0.6 revolutions per hour), maximum output torque 36 000 Nm.
Complementary functions are ensured by :
A torque limiter for load safety.
A rotation controller with speed repeater.
A manual control device for unblocking.

Chemical Engineering / Rubber

Extrusion / Blending
CMD manufacture specific reduction gears for blending and extrusion.
CMD includes in its reduction gears for extruders a thrust bearing to take up the thrust produced by the worm shaft.
CMD has long experience in designing and producing reduction gears for blenders (from 700 kW to 2500 KW).
 
Fertilizers

CMD provides complete drive solutions forrotating tubes (dryers, granulators, finishers). The package for the drive unit includes the motor and reduction gear assembly as well as thegearing (pinion plus ring gear).

 

Agitators
CMD designs and produces drive units for agitators.
CMD can provide the lifting system for the drive unit.

Special worm gears

Worm gears for « Raymond Mills » vertical mills

Torque range
Worm shaft made of hardened, tempered and ground steel
High acceleration centrifuge cast bronze wheels, with centre distance :
27’’ = 686 mm
36’’ = 914 mm
41’’ = 1041 mm
48’’ = 1219 mm
54’’ = 1371 mm
and ratios 54/5 – 65/4 – 76/5 – 94/5 104/5 – 94/7 and 100/7
Our maximum capacity is: centre distance = 1600.
 
CMD has more than 600 large-scale worm gears operating in vertical coal mills in leading manufacturers worldwide.
These gears are used in electric power stations and cement plants. The milling process involvesseveral pendulous rollers with pressure applied to the plate. These are directly controlled by the worm gear.

Presentation

Parallel and right angle   shaft reduction gears.
Modular range.
Gear reducers with sealing surface.
Casing adapted for vertical shaft models.
Gears are made of 18CrNiMo7-6 case hardened steel, calculated to have a life of 100 000 hours.
Bearings are calculated to have a life of over 100 000 hours when used in the most difficult situations.
Standard lubrication units made with components that have an excellent quality-price ratio.


Advantages

This new generation of reduction gear has been designed to meet the needs of users andenhance performance levels in the following domains:
less noise
Increased reliability
Reduced maintenance cost

New technical features : special reduction ratio,special casing…

Size
30 to 64
Power
4.5 to 10 000 kW
Ratio
6.3 to 500
Torque
10.7 to 1 179 kNm
 
Main fields of application

Mill and kiln drive for cement plants
Rolling mill for the steel industry
Conveyors used for the building materials industry, chemical industry and food industry
Shipping
Wood, paper and environmental industries
Drive systems for lifting devices

Millrex : double side drive for mills

Presentation

The MILLREX is a split torque reduction gear designed for side drives for cement mills and raw mills.
 
Advantages

Compact solution
The smallest and simplest form of civil engineering
The quickest fitting
Though mechanically welded housing
 
Technical description
Complying with design standards, procedures and instructions laid down in ISO 9001.
Housing :
Tough welded housing
Gearing :
All Millrex gears, including the 2 driving gears are made of 18 CrNiMo7-6 case hardening steel.
After cutting, gears are hardened, tempered and ground.
In conformity with ISO 6336, gearing life is 100 000 hours.
Bearings :
Bearings are calculated to have a theoretical minimum life of 100 000 hours L10, excluding factor a23, in conformity with ISO 281.
Driving gears :
The standard version is built with 2 self-aligning gears.
Oil lubrication

ERmill : Single side drive for crushing mills

Presentation

From a traditional crushing mill drive system made up of a reduction gear, couplings, bearings etc, CMD has developed the ERmill drive system.
This completely new concept is not onlymore compact, but also less costly than a traditional system.
Based on a more compact process, the ERmill is designed to remove the couplingalong with the coupling rod of the drive unit and to build the driving gear and bearings into the reducer.
The specificity of the ERmill is to have aself-aligning, hardened, tempered and ground side driving gear, which enables misalignment errors to be compensated for.

Advantages

Compact solution
Smaller and easier civil engineering
Quicker fitting
Tough mechanically welded casing
Modular technical solutions (driving gear assembly – gear ring lubrication)
 
Technical description

Complying with design standards, procedures and instructions laid down in ISO 9001.
Casing  :
Tough mechanically welded casing that is hot oil proof, made of steel grade S135 JR.
Gearings :
After cutting, gears are hardened and tempered and ground.
In conformity with ISO 6336, gearing life is 100 000 hours.
Bearings  :
Bearings are calculated to have a theoretical minimum life of 100 000 hours L10, excluding factor a23, in conformity with ISO 281.
Driving gears :
The standard version is built with 1 self-aligning gear.
Oil lubrication.

ERsun : Planetary gearbox

Presentation

ERsun-grand-formatThe ERsun is an optimized planetary gearboxes series, aimed at typical applications using in the heavy industry as in the Sugar, Cement Industry, Energy, etc.
This new industrial wide range application planetary gear units “ERsun” is inspired by the existing proven CMD planetary gearbox range (R2P/R3PH/R3P/R4PH).
It is designed taking into consideration the latest research results and standards in the domain of epicycle gears, modular design principles, as well as high manufacturing precisions achieved with the last generation machining facilities installed in CMD’s workshops.
 
Advantages

ERsun-serie- The housing parts are made of ductile cast iron and the structural design has been checked by FEM analysis. The total number of interchangeable modular gear housings for the complete ERsun range is reduced to enable minimum number of parts implying high stock availability and manufacturing cost reduction.
- The sun, planet gears and the primary helical gears are made of forged alloyed steel which is case hardened and ground. The annulus gears are made of FerryNod® cast iron which are also ground.
- The gears are calculated according to ISO or AGMA standards, in order to respect the characteristics of each application and to achieve to a level of lifetime very high.
- The bearings are selected and calculated according to ISO standards but are also selected taking into consideration the renowned suppliers’ recommendations which might be specific for some particular application.
- The combinations of gears and bearings are performed in order to propose an optimized solution and to achieve to a compact and reliable gear unit, for the use in different industrial sectors (cement, mining, sugar, steel, …).
- The ERsun become integrated with every configurations :  On the output side it is possible to design solid shaft (for gear coupling Flexident Senior®, square end shaft, external involute splines, …) and hollow shaft (for shrink disc, internal involute splines for example). The gear unit assembly can be also proposed according to the following arrangements : Gear housing base, torque reaction arm on one side, torque reaction arm with one torsional shaft support.
 
Technical description

- Input rotation speed up to 1800 rpm
- Gear ratio from 500 to 2500
- Nominal torque range from 130.000 to 3.600.000 N.m

Jumborex : Centrally driven for cement mills

Presentation

The JUMBOREX is a split torque reducer designed for centrally driven cement and raw mills. It is a coaxial reducer with parallel axis gear trains and 3 reduction stages.

 

Technical description

Size    10 sizesdu JC20 to JC62
Power    from 1500 kW to 6500 kW
Weight    from 40 tons to 115 tons
Torque    from 130 kNm to 4000 kNm

 

Advantages

Reliability  :
The JUMBOREX has been designed to have along life.
Gears are hardened, tempered and ground.
The casing and shafts have been optimised through the use of Finite Elements Modelisation in order to minimize deformation under load.
Ease of maintenance :
The upper casing can be dismantled within one hour to give direct access to all gearing.
3 standard levels of instrumentation are available in order to have reliable and easily usable information concerning the state of the JUMBOREX.
Designed to be easily and quickly fitted on site, with the possibility of adding most centrally driven reducers that currently exist on the market to the same place. JUMBOREX standards have been designed to adapt to industrial standards that are applicable to the cement industry throughout the world.

Bogiflex : Floating reducer with self-aligning gears

Presentation

The BOGIFLEX is a floating (shaft mount) reducer with self-aligning gear(s), which enables reduction of contact surface defects that exist on standard gear trains where gear wheels turn inside fixed bearings. This means that it is perfect for harsh environments such as high temperatures, severe shocks, distorted materials, vibrations, flexible mountings…
The BOGIFLEX enables transmission of high torque at low speed and has an extremely wide range of reduction ratio.

Features

The range: 12 different sizes (from BFT6 to BFT28).
High torque range: Up to 10 000 kNm.
Reduction ratio up to 10 000.
Weight: Up to 50 tons

 

Applications

Steel industry : Converters (LD, AOD,…), steel ladle drive, torpedo car, sinter line, sinter breaker, restrainers …
Heavy cylindrical kilns : Kilns and converters for copper, nickel, cement, coal and various dryers…
Sugar industry : Vertical diffusion tower (sugar beet), horizontal diffusion (sugar beet, sugar cane).
Heavy lifting : Crane drums.
Mines, excavation : Bucket wheel and bucket dredger.
Special drives with 0 backlash : large radars.
 
Advantages

Pressure and stress spread automatically over teeth.
Absorption of energy caused by knocks and/or torque variation control by means of: Torsion bar and / or shock absorber (on shaft mount)
Smaller dimensions (module, volume) and lower weight.
Possibility of using one or more pinions per drive.
Possibility of having a very wide passage of low speed shaft (use of girth gear).
Possibility of large hollow shaft diameter (use of wheel with hub).
Capacity to absorb momentary high overloading.
Adaptable flexibility depending on applications (shocks…).
Can withstand flexion, run-out (up to already 150 mm already witnessed!), displacement or distortion of the driven axis.
Numerous options (electronic control /predictive maintenance / security devices).
Separate components used for assembly – easier to ship and install on site.

 

Technical description

The AA cross section shows that the pinion and wheel gears cannot mesh on the P end only, as from the moment the load is applied, the tangential effort T which is applied on P and the reaction T’ of the articulated rod FM make a torque which forces the teeth to mesh together on all their face width, thus providing SELF ALIGNMENT OF GEARS.

Possible versions :
BF, BFT, BFP, which mainly differ from each other by the principle of the reaction arm S’ of the gearing component S.

Bogiflex KGD (Kiln Gear Drive)

Presentation

The Bogiflex KGD (Kiln Gear Drive) was specifically designed for driving kilns in the cement and mining industry.
It is based on the Bogiflex concept. It is therefore a floating and self aligning system, which allows to compensate for all the kiln shell movements and deformations.
 
Advantages

-          Floating and self alining system : the girth gear meshing is not influenced by the kiln shell movements or deformations.
-          Life duration of the main components is increased (especially for pinion and girth gear)
-          Increased reliability
-          Reduced maintenance costs
-          Full design and supply by CMD, including for lubrication systems
-          Competitivity of the Bogiflex against conventional systems
-          Possibility of replacing conventional systems (reverse engineering) with limited modifications on the drive environment
-          Standardisation in 3 sizes, allowing to share major spare parts between different kilns
 
Technical description

The Bogiflex KGD consists in the following components :
-          The nodular iron girth gear (optional steel version) is mounted to the kiln via tangential blades.
-          The Bogiflex KGD, which case carburized pinion meshes with the girth gear. The relative position of the pinion to the girth gear remains constant, thanks to a system of positioning rings and rolling tracks. The Bogiflex KGD is supported by an articulated torque arm, allowing a wide movement range.
-          The primary gearbox, driving the Bogiflex through a cardan shaft.
-          The auxiliary drive

Haflex : shaft mounted or floor mounted split torque reducer

Presentation

The Haflex is a split torque reducer (2 or 4 pinions balanced under load drive the main wheel). Two ways of mounting are possible: shaft mounted (HALFLEX suspended, hollow low speed shaft), or floor mounted (with solid low speed shaft and mounting base).
The Haflex enables transmission of high torque at low speed and offers an extremely wide range of ratio.
 
Features

The range: 10 different sizes
Torque up to 3 500 kNm
Ratio up to 10 000
Weight: Up to 56 tons
ApplicationsHaflex2

Steel industry : converters (LD, AOD…), sinter line, sinter breaker.
Sugar industry :horizontal diffusion, mixer, cane sugar mill.
Mines, excavation :bucket wheel, bucket dredger.
Miscellaneous :autoclave, vertical agitator, vertical separator, crane wire drum drive.
 
Advantages

Compact and robust (main housing closed).
Shock absorption and/or torque variation control by means of:
Torsion bar and/or shock absorber (shaft mount)
dynamometric damper (floor mount)
electronic control (option)
Withstands flexion, run-out etc. of the driven shaft (shaft mount)

 

Technical description

Major components within
the main housing are:
 The low speed wheel and its pinions
(2 or 4),
Sometimes a parallel shaft primary reducer on each pinion.
Additional: 2 primary floating bevel reducers connected by means of a sliding universal joint and 2 reaction arms for balance.

Caneflex : Sugar cane mill driving

Presentation

The CANEflex is a gear reducer specifically designed to drive sugar cane mills.
The new CANEflex Neo design replaces former CMD CANEflex gearbox designed in 1996 for output torques going from 1300 to 2800 kNm, and power ranging from 500 to 1800 kW.

 
Advantages

– High efficiency and availability
– Minimum maintenance
– Easy access to all gearbox stages in less than half an hour without changing gearbox configuration during inspection 
– LS shaft and bearings designed to withstand tail-bar coupling effects
– Shock absorption gear mesh force balancing by output ring gear resiliently mounted
– Measuring and monitoring of the output torque absorbed by the mill
 
Technical description

- Input rotation speed up to 1800 rpm
- Gear ratio up to 500: 1
- Bearings with a calculated lifetime of L10h > 120 000 h as per ISO 281
- Integration of a CMD parallel shaft gearbox as the primary CANEflex Neo gearbox to achieve gear ratios greater than 1000:1 in case of turbine

Canemaster : Sugar cane mill driving

Presentation

The CANEMASTER is the second generation of CMD planetary gearboxes specifically designed for sugar cane mill driving.
The CANEMASTER gearboxes complete the CANEFLEX portfolio for driving both small and medium sugar cane mills where the initial acquisition investment of the CANEFLEX technology is high. In addition, the CANEMASTER is a simplified, robust and competitive solution for driving sugar cane mills of large capacity.
The CANEMASTER has been designed for operating nominal torques between 650 and 2800 kNm, and for power rates from 180 to 1800 kW.

Advantages

– High efficiency
– Rapid and simple installation with only 4 anchor bolts
– Monitoring of absorbed torque by the mill using input gear torque-measuring coupling
– Gearbox protection in case of overloads
– Integration of an auxiliary gearbox at input shaft in case of driving by steam turbine
 
Technical description

- Input speed up to 1800 rpm
- Gear ratios up to 400: 1
- Bearing lifetime L10h > 120 000 h as per ISO norm 281
- Suitable for both gear and sling couplings

Presentation

CMD has developed the range of ROLLEREX reducers to drive vertical mills using rollers. These ROLLEREX reducers are designed to withstand all efforts stemming from the milling operation while driving rotation of the vertical mill. In this context, CMD has decided to combine performance and reliability in the design of the ROLLEREX range.

 
Technical description

Size    20 Sizes
Power    150 to 3000 kW
Ratio    from 19 to 51
Torque    from 35 kNm to 1300 kNm
Static Vertical Efforts    21 000 kN
Dynamic Vertical Efforts    35 kNm to 1300 kNm


Advantages

Sizing adapted to most currently used vertical mills
Extremely compact
Extremely low noise level
Capacity to withstand the axial efforts and vibrations stemming from the mill with great safety
A very safe and efficient hydraulic and electrical system
Lubrication units adapted to each reducer of the range
A design and production quality recognised throughout the mechanical world

Features

Input    Spiral bevel gear train, cut on a Klingelnberg machine
Output    Planetary gear train with sun and satellites made of forged steel type 18CrNiMo7-6 with teething hardened tempered and ground.
     Axial efforts are supported by the means of several independent, oscillating thrust pads
Lubrification    The independent central unit is made up of a high pressure circuit and low pressure circuit.

Pinion stand : Rolling mill reducers

Presentation

With our long record of experience, CMDdesign and produce steel mill drive andgear wheel cages upon customer request. These can be extremely big.
Tools for calculating tooth geometry for optimal characteristics when load is applied.
Possibility of using Finite Elements Modelisation to calculate stand mill casing.
Design and modifications involving special materials upon request of the customer :Special extensions, lubrication, ways of controlling pinion stand, etc.
Pinion stand gear wheels hardened quenched and tempered with ground teeth.
Wheels with a diameter up to 4500 mm, weighing up to 40 tons.
Perfect geometry of teeth through our control methods.
Power    from 4 000 kW to 11 700 kW
Shafts centre distance     from 600 mm to 1 300 mm
Weight    up to 215 tons

Presentation

CMD offer a series of ZAFLEX worm and wheel reducers and gear motors with or without primary helical gear trains, with a power range of 0.18 kW to 90 kW.
These reducers and gear motors are available with hollow output shafts or standard output shafts with a diameter ranging from 25 to 140mm.
The cast iron housing is extremely well ventilated and has been designed to be used in any operating position without requiring accessories.
The fact that they may be coupled together means that an extremely wide range of output speeds may be obtained.

 

Options

Backstop
Reaction arm for shaft mounted model
Torque control by means of dynamometric damper

 

Advantages

Silent
The principle behind the way worm gears work, by teeth creeping, combined with a high drive ratio, results in the lowest noise level of all gear transmission systems.
Compact
For many applications, having a compact reducer is essential.
DURAND reducers have been designed to reduce size:
Orthogonal layout of shafts
Hollow shaft assembly
High ratios in a small size
Robust
An extremely rigid casing and the use of high quality components with well sized dimensions ensures extremely robust units.
DURAND reducers can transfer high torque without requiring a lot of space.

Presentation

These reducers are available with hollow or standard output shafts with diameters from 70 to 180mm, in casing made of cast iron, GS cast iron or cast steel.
Ratios range from 5 to 60. The fact that they may be coupled together means that an extremely wide range of output speeds may be obtained.
Output shaft diameter from 70 mm to 180mm.
Works as a reduction gear or step-up gear.
Weight from 130 kg to 2 tons.

 

Options

Reaction arm
Supporting frame for motor
Multi-positioning for fixing brackets and base plates.
GV and PV coupling
Brake
Backstop
Torque limiter
Slow speed shaft with pins, tangentials or bushes
Mechanical torque control by means of dynamometric damper
Electronic torque control
Electronic speed control
Etc

 

Advantages

Silent
The principle behind the way worm gears work, by teeth creeping, combined with a high drive ratio, results in the lowest noise level of all gear transmission systems.
Compact
For many applications, having a compact reducer is essential.
DURAND reducers have been designed to reduce size:
Orthogonal layout of shafts
Hollow shaft assembly
High ratios in a small size
Robust
An extremely rigid casing and the use of high quality components with well sized dimensions ensures extremely robust units.
DURAND reducers can transfer high torque without requiring a lot of space.

Presentation

High capacity reducer
The range: 8 different sizes, with centre distance from 560 mm to 1 250 mm.
Torque capacity up to 3 000 KNm.
Reduction ratio from 7,5 to 60.
Weight: from 2.5 tons to 20 tons.
Hollow shaft with bore from 200 mm to 450 mm.
Works as a reduction gear and step-up gear.
A DURAND or ERMASTER reducer may be coupled as a primary stage.
Reaction arm
Motor support
Coupling
Brake
Dynamometric damper, torque limiter
Electronic torque control

 

Advantages

Silent
The principle behind the way worm gears work, by teeth creeping, combined with a high drive ratio, results in the lowest noise level of all gear transmission systems.
Compact
For many applications, having a compact reducer is essential.
DURAND reducers have been designed to reduce size:
Orthogonal layout of shafts
Hollow shaft assembly
High ratios in a small size
Robust
An extremely rigid casing and the use of high quality components with well sized dimensions ensures extremely robust units.
DURAND reducers can transfer high torque without requiring a lot of space.

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PŘEVODOVKY CMD