Modern Coupling

ByAshvani Kumar Shukla

Manager(C&I)Reliance

Index Introduction Type of Modern couplings1.Diaphragm Coupling2.K-Coupling3.SK coupling4.H-Coupling

Diaphragm Coupling Diaphragm couplings are designed for the connection of high-speed shafts.

They compensate the axial, radial and angular offset of two coupled shafts. Diaphragm couplings ... have high torque capacity at low weight are maintenance and wear-free are rotor dynamically optimized The torque capacity ranges up to 1,500 kNm, the speed up to 80,000 rpm

and a maximum allowable angular displacement of up to 0.5°. diaphragm coupling converts torque reliably, safely, and without wear or the

need for maintenance. Equipped with single or double diaphragms, these con nection couplings cover a performance range between 100 and 70 000 kW.

Flexible couplings Highly Flexible Couplings shift resonance frequencies in a driveline

out of the speed range. They also damp critical torsional vibration amplitudes and torque shocks.

The couplings improve the availability of all drive components and thus reduce life cycle costs for the system. The transmitted torques range up to over 500 kNm.

Many type of flexible couplings are used in now a days. Some of them are explained here.

K-Coupling:-K couplings are the standard for our highly flexible couplings. They

feature modular design and can be integrated into your drive system with a high degree of flexibility. This makes this type of coupling an ideal and cost-effective choice for many appli cations in a wide range of industrial sectors.

K couplings dampen torsional vibrations and torque shocks in the driveline. In add ition, K couplings balance axial, radial, and angular displacements. The operational stability and service life of your plant or your vehicle are in creased, which in turn in creases availability and reduces life cycle costs.

Bell-house bearing models and models with torsional limiting device are optional.

Technical data Torque up to 140 kNm Speed up to 13,000 rpm Mounting options Cardan shaft mounting Separate mounting

Bell-house mounting

Elastomer types Natural rubber (NR): 45 ShA, 50 ShA, 60 ShA, 70 ShA Silicone: 50 ShA Electrically insulating: 55 ShA Ambient temperatures Natural rubber (NR): -40 – +90°C Silicone: -40 – +120°C Electrically insulating: -40 – +90°C Optional Radially removable Torsional limiting device Bell-house bearing design (in cases where the engine crank shaft is not

able to bear the weight of the cardan shaft and the coupling)

Advantages and benefitsResonance speeds are shifted into non-critical speed ranges. The system runs

quieter, increasing comfort when operating the equipment or vehicle. Elastomer elements dampen torsional vibration peaks that occur in the

driveline. Thanks to their elasticity, these elements reduce the stresses on the driveline caused by internal combustion engines or load-side units with their natural fluc tuations in torque. Your system or vehicle runs with a high degree of operational durability. And that increases productivity.

The coupling takes the load off all of the drive components, increasing their service life and reducing maintenance costs. The net result is a positive impact on the life cycle costs (LCC) for your system or vehicle – not to mention preventing consequential expenses arising from downtime.

Its modularity makes this coupling extremely flexible with respect to function and design. You get a coupling that is precisely matched to your driveline's technical and design requirements. Standardized components ensure an optimal cost/bene fit ratio.

The K coupling features a high torque capacity. You save installation space while at the same time transferring high torque safely and reliably.

Sk coupling Highly flexible SK couplings are especially well-suited

for drives whose power take-off is directly connected to the motor housing. These couplings are highly versatile.

SK couplings dampen torsional vibrations and torque shocks in the driveline. In addition, the coupling balances axial, radial, and angular displacements. The oper ational stability and service life of your plant or your vehicle are increased, which in turn increases availability and reduces life cycle costs.

Bell-house bearing models and models with a torsional limiting device are optional.

Technical data Torque up to 16 kNm

Speed up to 4,200 rpm

Mounting options

Cardan shaft mounting

Bell-house mounting

Elastomer types

Natural rubber (NR): 50 ShA, 60 ShA, 70 ShA

Silicone: 50 ShA

Electrically insulating: 55 Sh

Ambient temperatures

Natural rubber (NR): -40 – +90°C

Silicone: -40 – +120°C

Electrically insulating: -40 – +90°C

Optional

Bell-house bearing design (in cases where the engine crank shaft is not able to bear the weight of the cardan shaft and the coupling)

Torsional limiting device

Advantages and benefits Resonance speeds are shifted into non-critical speed ranges. The system

runs quieter, increasing comfort when operating the equipment or vehicle. The coupling takes the load off all of the drive components, increasing

their service life and reducing maintenance costs. The net result is a positive impact on the life cycle costs (LCC) for your system or vehicle – not to mention preventing consequential expenses arising from downtime.

The coup ling is designed with an axial plug-in connection. This makes the coupling especially well-suited for bell-house mounting, where the driven unit is directly connected to the motor housing. The coupling aligns itself automatically when the drive unit and driven unit are assembled. This reduces the effort and costs associated with installation, fitting, and commissioning.

The SK coupling features a high torque capacity. You save on installation space while at the same time transferring high torque safely and reliably.

The coupling design is simple. It consists of only three main components and is virtually maintenance-free. The rubber element is the only part subject to natural wear and must be replaced as needed. Minimal effort is required to remove and inspect the rubber element. This keeps maintenance costs low.

H-Coupling Highly flexible H couplings are especially well suited

for pump power distributors and converter gear units. These couplings feature two damping systems working in parallel: a spring-mass system and a viscous-hydraulic damping system. These couplings are very compact, temperature-resistant, and highly versatile.

H couplings dampen torsional vibrations and torque shocks in the driveline. The operational stability and service life of your system or your vehicle are increased, which in turn increases availability and reduces life cycle costs.

A torsional limiting device is optional.

Technical data Torque up to 3.7 kNm

Speed up to 3,200 rpm

Mounting options Bell-house mounting

Spring tension adjustable

Ambient temperature -40°C – +110°C

Optional Torsional limiting device

Advantages and benefits Resonance speeds are shifted into non-critical speed ranges. The system runs

quieter, increasing comfort when operating the equipment or vehicle.

The coupling takes the load off all of the drive components, increasing their service life and reducing maintenance costs. The net result is a positive impact on the life cycle costs (LCC) for your system or vehicle – not to mention preventing downtimes and associated costs.

Radially arranged steel compression springs transfer the torque from the motor to the driven machine. The springs generate high damping values and operate virtually wear-free. The coupling features very long uptimes. This keeps your service and maintenance costs low.

The damping effect of the steel springs remains constant over a very wide range of temperatures. Wide fluctuations in temperature have almost no effect on the operation of the coupling, which means your system or vehicle operates more safely even under extreme environmental conditions.

The viscous-hydraulic damping system operates using a temperature-resistant damping grease. The damping effect increases proportionally to the coupling's angle of twist. This means that severe torsional vibrations, such as those which occur when turning a motor on and off or during load surges, also lead to a greater damping effect. This gives the coupling optimal damping behavior across the entire nominal speed range.

The coupling is designed to be completely maintenance-free and dirt-resistant. This saves you money on service and dirt-related damage.

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