UNEFLEX Tyre Couplings

The Uneflex tyre coupling is a highly flexible rubber fabric coupling appropriated for compensation of big shifting and shock energies.

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Its remarkable high elasticity makes it possible to compensate extremely large offsets in all directions without generating wear. Free from backlash, it is the appropriated coupling to absorb torque peaks and dampen vibrations, due to its quick smoothing qualities.

One of the most interesting features of the Uneflex shaft coupling consists on the simple way in which the elastic tyre is coupled. The tyre, composed of natural rubber with fabric reinforcements, are set on the coupling’s hub and fixed by means of fastening the rings with the screws. The coupling’s rubber tyre is split, allowing the rubber band to be radially replaced without moving the hubs and realigning either the driver or the driven equipment, reducing downtime.

The fabric of the tyre can be aligned radially (R arrangement) or transversally (X arrangement), obtaining a different spring stiffness. R fabric arrangement tyres have a lower torsional stiffness, but the X arrangement is better suited for reverse operations and shock loads.

The Uneflex tyre coupling covers a high range of series: from the standard, to taper lock bushings, with spacer for pump drives, with brake discs and brake drums in accordance with the standards of the cranes of metallurgical plants, with SAE flywheel assembly, with special design tyres to balance greater misalignments for drives with sliding rotor motors and many other designs already created or to be developed for your application.

Features and benefits of tyre couplings

• Zero maintenance: No routine maintenance or lubrication required
• Quick and easy installation and replacement: Design that allows a quick and easy element installation and replacement without moving hubs and realigning either the driver or the driven equipment, reducing downtime
• High misalignment capabilities: Compensates extremely large angular, axial and radial misalignments
• Vibration dampening and shock absorption: Due to its quick smoothing qualities, provides damping properties to the torsional vibration induced in the system by cyclic variation of the twisting moment and shocks induced by the fast load variation, protecting the entire system
• Working temperature range from -20°C to +80°C with the standard tyre of natural compound and from -15°C to +100°C with the chloroprene tyre compound

UNE flexible couplings misalignments

Application fields for tyre couplings

• Suitable for applications with difficult alignment characteristics
• Ideal for applications with vibrations and thermal expansions
• With high response to torque peaks and great shocks
• Especially suited for use in cranes and roller table drives of metallurgical plants

Shaft to shaft tyre coupling UNEFLEX

Tyre Coupling for taper bush UNEFLEX

Tyre coupling with dismantling spacer for pump drives UNEFLEX

Tyre coupling with brake disc UNEFLEX

Tyre coupling with brake drum UNEFLEX

Coupling with tyres for large displacements UNEFLEX

UNE has a remarkable experience working in pump installations. The UNEFLEX elastic tyre coupling works successfully in these types of applications, as it tolerates strong misalignments and isolates vibrations. When pumps start ups are made, the tyre coupling prevents the machinery from having any strong vibration or defectiveness as it is verified that the rubber is able to face the inertia moments. Moreover, the shock of the engine start up is absorbed by the highly elastic coupling, increasing the life of the pump and gear.

Flexible spacer coupling

UNEFLEX highly elastic rubber tyre spacer coupling in a pump installation

In addition to the current UNEFLEX flexible tyre couplings, UNE also manufactures spacer couplings. It consists of a Uneflex tyre coupling plus a spacer flange assembly.

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The spacers coupling are designed for use on applications where it is an advantage to be able to move either shaft axially without removing the gear and the pump.

UNEFLEX flexible rubber spacer coupling easy to remove

Applying this tyre coupling design, we are able to remove the mechanical seal for easier maintenance systems and repairs without moving either the pump or the gear. They are design with standard distances between shaft end dimensions (D.B.S.E.), but we can design the coupling that best fits with your application requirements.

Sectors where the UNEFLEX flexible tyre coupling is located in pumps

UNEFLEX elastic tyre Couplings applied in pumps in different kinds of industries

The UNEFLEX couplings that are placed in pumps are located in many different types of industries, as for example, paper mills, textile industry, in the steel making plants, food processing industry, marine and sea applications and also in chemical industry.

Fields of Application for Couplings Placed in Pumps

Couplings can be applied in centrifugal pumps, which can be identified in many types of different industries or fields of application:

• Oil and gas chemical industries: the pumps play an important role in converting crude oil into the end product. They are relevant to provide the right fluid or volume of pressure and liquid transfer. Sometimes pumps are used to adjust the temperature in some parts of the system.

• Agriculture: pumps are used mainly in machinery used for irrigation.

• Mining and metallurgy industries: the main function consists on draining and cooling water supplies.

• Nuclear plants: it is required a high level of primary and secondary pump system, while the thermal power plants also need boiler feed pumps, compensate pumps, loop pumps, and ash pumps.

• Military applications: hydraulic fluids are required in this field in order to adjust planes’ wings and rudders, turning turrets on ships and tanks, the up and down of submarines, etc.

• Shipbuilding: In shipbuilding it is very common to find many types of pumps in a ship.

• Water supplies: these are included or used in municipal water supplies and drainage, water supplies of locomotives, lubricating and cooling machine equipment, and sugar refining.

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