Tyre couplings are used in many sectors where transmission from a motor to the connected machine is needed. Iron and steel industry, shipbuilding, compressors, mining industry, paper manufacturing machinery, cement manufacturing installations, pump installations, electrical power generators and hoisting applications for instance.Link to full technical specification catalogue
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Additional torsionally soft, highly flexible couplings for mechanical power transmission are the ELPEX® and the ELPEX-S® series
ELPEX® couplings are highly torsionally flexible and free of torsional backlash. Because of their low torsional stiffness and damping capacity, ELPEX couplings are especially suitable for coupling machines with a very non-uniform torque pattern. ELPEX couplings are also suitable for connecting machines with high shaft misalignment. Standard ELPEX coupling types are designed as shaft to shaft connections or flange to shaft connections.
Application-related types can be implemented on request.
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The ELPEX® coupling is available in 9 sizes with a nominal torque of between Nm and 90,000 Nm. The coupling is suitable for ambient temperatures of between -40°C and +80°C. The ELPEX coupling is frequently used for high-quality drives which have to guarantee very long service life in harsh operating conditions. Examples of applications are mill drives in the cement industry, marine main and secondary drives or drives on large excavators powered by an electric motor or diesel engine.
Like the ELPEX-B® the ELPEX® coupling is suitable for horizontal and vertical mounting positions or mounting at any required angle. The coupling parts can be arranged as required on the shafts to be connected. The split flexible rings can be changed without having to move the coupled machines. The flexible rings are mounted without backlash and give the coupling progressive torsional stiffness, i.e. torsional stiffness increases in proportion to coupling load. The ELPEX coupling is especially suitable for reversing operation or operation with changing directions of load. The coupling is delivered preassembled. The flexible rings are completely assembled. On the type ENG, the coupling halves have to be bolted together after the hub has been mounted. On the type EFG, after mounting the coupling hub, only the outer flange has to be connected to the machine. Outer flanges with different connection dimensions are available for the type EFG. If the flexible rings are irreparably damaged or worn, the metal parts can rotate freely against one another, they are not in contact with one another.
The ELPEX coupling's transmission characteristic is determined essentially by the flexible rings. The flexible rings are manufactured from a natural rubber mixture with a multiply fabric lining. The flexible rings are split so that they can be changed without having to move the coupled machines. The flexible rings are fastened to the hub with a clamping ring and to the outer flange with a clamping ring, using pins and bolts. On the EFG type, the outer flange is designed with connection dimensions for connection to e.g. a diesel engine flywheel. On ENG types, the outer flange is fitted to a second hub part, which then enables the shaft to shaft connection.
Types ENGS and EFGS are provided with a fail-safe device. In normal operation the torsion angle of the flexible rings is smaller than the gap between the cams. In normal operation there is no metal to metal contact. If the flexible rings fail, cams transmit the torque from the inner part and outer part. These enable the coupling to be used in emergency mode for a short time. This option is frequently required e.g. in the case of marine drives.Link to full technical specification catalogue
Coupling suitable for use in potentially explosive atmospheres.
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Complies with the current ATEX Directive for:
II 2GEx h IICT4 ... T3Gb
XII 2DEx h IIICT120 °C ... 160 °CDb X
I M2 Ex hMb X
(Type EST is not available in Ex version.)
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ELPEX-S couplings are highly torsionally flexible and because of their low torsional stiffness and damping capacity are especially suitable for coupling machines with a highly non uniform torque pattern. Standard ELPEX-S coupling types are designed as flange to shaft connections or shaft to shaft connections. Application-related types can be implemented on request.
The ELPEX-S coupling is available as a catalog standard in 12 sizes with rated torques of between 330 Nm and Nm. The coupling is suitable for ambient temperatures of between -40 °C and +120 °C.The ELPEX-S coupling is frequently used for diesel motor drives or reciprocating compressor drives.
Because the different rubber versions enable the torsional stiffness to be adjusted to meet requirements, the coupling is also suitable for drives which require a specific and preferably pre-calculated torsional vibration behaviour setting.
The ELPEX-S® coupling is suitable for horizontal and vertical mounting positions or mounting at any required angle. The coupling parts can be arranged as required on the shafts to be connected. ELPEX-S couplings are especially suitable for reversing operation or operation with changing directions of load. The rubber disk elements are fitted virtually without backlash and give the coupling linear torsional stiffness, i.e. the torsional stiffness remains constant even when the load on the coupling increases. There are 4 different rubber element versions with different grades of torsional stiffness available for each size from stock. On certain types the flexible rings can be changed without having to move the coupled machines. If substantial overload occurs, the rubber disk element of the coupling is irreparably damaged, the coupling throws the load and thus limits the overload for particular operating conditions. The coupling can be inserted and fitted blind e.g. in a bell housing. There are outer flanges with different connection dimensions available for each coupling size.
The rubber disk element is vulcanized onto a flange on the inside diameter. The flange can mount e.g. a taper clamping bush or a hub. On its outer diameter the rubber disk element has driving teeth, which are inserted into the outer flange. The torque is transmitted positively between the rubber disk element and the outer flange. In the type for shaft-shaft connection the outer flange is screwed to a flange hub mounted on a machine shaft.
The ELPEX-S coupling can also be designed with a fail-safe device. If the rubber disk element fails, the coupling can continue operating in emergency mode for a short time. This option is frequently required e.g. in the case of marine drives. If the rubber disk element fails, cams transmit the torque from the inner and outer parts of the fail-safe device. In normal operation the torsion angle of the rubber disk element is smaller than the gap between the cams, so there is no metal to metal contact.Link to full technical specification catalogue
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Apr 6,
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Tyre couplings play a crucial role in various industrial applications, offering numerous benefits alongside certain drawbacks. This article aims to explore the advantages and disadvantages of Tyre coupling, shedding light on its functionality, construction, and suitability in different scenarios.
Tyre coupling is a type of flexible coupling widely used in machinery to connect two shafts, compensating for misalignments and damping vibrations. It consists of two flanges with a flexible tyre element in between, typically made of high-quality rubber or synthetic material.
Before delving into Tyre coupling specifics, it&#;s essential to understand the significance of couplings in machinery. Couplings serve as connectors between rotating shafts, transmitting power while accommodating misalignments, shock loads, and vibrations. They are critical for ensuring smooth operation and prolonging the lifespan of machinery components.
Tyre couplings feature a simple yet robust construction. They comprise two hubs or flanges, each attached to the shaft of the connected machinery. A flexible tyre, usually made of elastomeric material, fits between these hubs, providing the necessary flexibility and damping characteristics.
Tyre couplings excel in dampening vibrations generated during machinery operation. The flexible tyre element absorbs shock and torsional vibrations, minimizing stress on connected components and enhancing overall system reliability.
One of the key advantages of Tyre couplings is their flexibility and torsional resilience. They can accommodate axial, radial, and angular misalignments between shafts, ensuring smooth power transmission even in challenging operating conditions.
Tyre couplings are relatively easy to install and maintain, requiring minimal downtime for servicing. Their simple design and fewer moving parts simplify inspection and replacement procedures, reducing operational disruptions and maintenance costs.
Tyre couplings can accommodate a certain degree of misalignment between connected shafts, prolonging the lifespan of machinery components and reducing the risk of premature wear. This flexibility ensures optimal performance even in less-than-ideal operating conditions.
In applications where shock loads are common, Tyre couplings provide valuable protection to connected equipment. The flexible Tyre element acts as a buffer, absorbing sudden impacts and preventing damage to shafts, bearings, and other critical components.
While suitable for many industrial settings, Tyre couplings have limitations when it comes to high-speed applications. Excessive rotational speeds can lead to premature wear and potential failure of the flexible Tyre element, necessitating careful consideration of operating conditions.
Tyre couplings may exhibit sensitivity to extreme temperatures and certain chemicals, affecting their performance and longevity. Exposure to high temperatures or corrosive substances can degrade the rubber material, compromising the coupling&#;s effectiveness and requiring frequent replacements.
Like any mechanical component, Tyre couplings experience wear and tear over time, particularly in demanding operating environments. Continuous exposure to vibrations, misalignments, and dynamic loads can gradually degrade the flexible Tyre element, necessitating periodic inspection and replacement.
To ensure optimal performance and safety, Tyre couplings require regular inspection and maintenance. Routine checks for wear, tear, and signs of deterioration are essential for identifying potential issues early and preventing unexpected failures that could result in costly downtime and repairs.
While Tyre couplings can accommodate misalignments to some extent, excessive or repeated misalignments can pose problems. Severe misalignment issues may lead to accelerated wear, reduced efficiency, and ultimately, the need for premature replacement of coupling components.
In conclusion, Tyre couplings serve as versatile and reliable components in various industrial machinery applications, offering significant advantages such as vibration dampening, flexibility, and cost-effectiveness. Despite their limitations regarding high-speed operations and sensitivity to temperature and chemicals, proper selection, installation, and maintenance can maximize the performance and longevity of Tyre couplings, ensuring smooth and efficient operation of connected equipment.
Where to purchase Tyre Couplings?
You can purchase chain couplings directly from couplinghouse.com.
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