RINGFEDER TNR DIESEL ENGINE COUPLING – Efficient Stiffness Adjustment

In modern industrial drive systems, especially those subjected to dynamic loads, torsional vibration, and continuous changes in operating modes, controlling the torsional stiffness of the coupling plays a crucial role in equipment stability and lifespan.

The Ringfeder TNR flexible coupling (also known as a diesel engine coupling) was developed to directly address this problem, providing a highly flexible drive solution with adjustable stiffness and extremely convenient maintenance.

1. Challenges in Designing Low-Stiffness Flexible Couplings

According to Norbert Telaar – Head of Strategic Product Management at Ringfeder Power Transmission, the biggest challenge in developing a flexible coupling is: “Designing a coupling with a particularly smooth characteristic curve.”
In other words, a “flexible” coupling must not only be elastic, but must also:
– Effectively absorb vibrations
– Reduce impulse transmission to the shaft, bearings, and gearbox
– Avoid dangerous resonances across the operating speed range
> This is a very difficult requirement to achieve with traditional elastic couplings.

2. The Principle of Stiffness Adjustment of Ringfeder TNR Diesel Engine Couplings

The highlight of Ringfeder TNR diesel engine couplings is the ability to adjust torsional stiffness within the same coupling size.
Stiffness can be adjusted by:
– Selecting different elastomer rubber materials
– Changing the stiffness of the Ringfeder TNR elastomer rubber assembly
– Arranging the elastomer rubber on multiple planes in a series configuration
This allows the coupling stiffness to be easily adjusted and replaced to suit specific requirements without changing the coupling size.

View product: Ringfeder TNR flexible coupling

3. Results: The Ringfeder TNR diesel engine coupling has high flexibility and a soft characteristic curve

The Ringfeder Power Transmission research team based their findings on the principle of a type of coupling already proven in the steel industry – using cylindrical elastomer rubber to transmit torque.
Instead of limited stiffness adjustment, Ringfeder TNR allows:
– Individually adjustable stiffness of the coupling
– Superior softness characteristic curve achievement
– Suitable for drive systems with highly variable loads

Actual photos of Ringfeder TNR rubber shock absorbers.

4. Outstanding Advantages of Ringfeder TNR Diesel Engine Couplings in Operation and Maintenance

A crucial advantage of Ringfeder TNR diesel engine couplings is their quick and simple maintenance.
According to Reinhardt Hackenschmidt – Head of Engineering Design and CAD, University of Bayreuth: “The great advantage of this coupling is that the polymers – specifically the coiled polymer elements – are very easy to disassemble.”
– Adjustable stiffness to meet factory requirements
– Quick replacement of damping rubber – no need to remove the shaft
– Reduced total cost of ownership (TCO): Fewer secondary failures, simple maintenance, extended system lifespan

5. Dai Hong Phat – Authorized Distributor of Ringfeder TNR Diesel Engine Couplings

With its outstanding advantages, Ringfeder TNR diesel engine couplings are the optimal choice for modern industrial drive systems.

As an authorized distributor of Ringfeder Germany in Vietnam and several Southeast Asian countries, Dai Hong Phat provides:
– Genuine Ringfeder TNR diesel engine couplings
– On-site “Consultation – Installation – Calibration” services
– Guaranteed stable supply chain, readily available spare parts, reduced downtime
– Support in sourcing parts according to requirements

See article: Dai Hong Phat Celebrates 10 Years – Authorized Representative of Ringfeder Germany

Contact Dai Hong Phat Corp to receive advice from our experienced engineering team on the most suitable Ringfeder TNR diesel engine coupling solution for your drivetrain.

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