Long lifespan

Torsion Control Products produces coupling design for one of the world’s largest haul trucks

W‌ith their unique torsional characteristics, spring couplings from Torsion Control Products (TCP) are designed for diesel engines used in construction machines, agricultural vehicles, industrial equipment, marine powertrains and mining equipment. For one of the world’s largest mining vehicles, TCP created a coupling with an extremely long lifespan.

A long-time Torsion Control Products customer faced a heavy challenge while producing one of the largest mining vehicles in the world: a 400-ton, gear-driven haul truck. The truck required 3000-plus horsepower. To achieve this, it used a 12-cylinder engine bolted to a TCP coupling that was connected to the crank nose of another 12-cylinder engine. However, under these extreme operating conditions, the standard coupling design only lasted 250 hours.

TCP engineers created a unique, re-buildable coupling to connect the engines, which was able to last over 20 000 hours. It tuned the system while meeting the manufacturer’s durability requirements. The customer went to market with a custom coupling solution that lasted longer and saved money with its re-buildable design. After nearly two decades, the customer continues to use the TCP coupling to this day.

“In mining equipment as well as in construction machines, agricultural vehicles etc., couplings need to cope with ever more unusual installation spaces,” says Dr. Peter Jaschke, Business Development Manager for TCP. “The couplings must be adaptable to all possible conditions, such as narrow spaces in which heat accumulates and cannot dissipate due to the seals. Or they must be able to bridge large distances to other drivetrain components that cannot be installed near the coupling or engine.”

With their unique torsional characteristics, TCP spring couplings are especially suited to modern diesel engines that produce lower emissions and more power in smaller packages at lower operating speeds. They run reliably and attenuate drivetrain vibration even in the roughest of applications. With their Smart Damping system, the spring couplings can be tuned to supply damping only when needed and to isolate resonance when damping is detrimental. This reduces torsional spikes at startup, shutdown and transient events, which increases the coupling’s lifespan.

“In mobile machinery the goal is to utilize wide engine speed ranges so that the engine can always run at the ideal speed along its characteristic curve to maximize available power and minimize emissions. In modern diesel engines, the torque at low revs is ever increasing. This requires a perfectly matched coupling,” Dr. Peter Jaschke explains. “Also, engines and machines are becoming ever lighter, resulting in more dynamic powertrains. The need to handle more power with smaller components is therefore inevitable. Lightweight construction also means higher vibration levels from the motor side and impact loads from the drive side. Isolating these resonances at both sides of the coupling is becoming ever more important.”

www.torsioncontrol.com

x

Related articles:

Issue 09/2020

Torsional LK series couplings for mobile hydraulics applications

Power transmission specialist Lovejoy LLC has further expanded its European presence and now also produces torsional couplings of the LK series in its own subsidiary company R+L Hydraulics GmbH,...

more
Issue 01-02/2014

Fluid couplings for China

The mining company Xishan Jinxing Energy Co. Ltd (Fig. 1) relies on the fill-controlled 866 TPKL fluid coupling from Voith. A total of three fluid couplings are used underground in the powerful 4.8 MW...

more

Increased torque of N-Arpex all-steel disc coupling

Flender is rounding off its range of N-Arpex couplings, first introduced in 2017, with two new designs featuring 8 and 10 bolting points. N-Arpex now covers a diameter up to 988 mm and a torque up to...

more
Issue 06/2022

Three new N-Eupex couplings and optimized flexible elements

Flender is expanding the portfolio of its flexible coupling series N-Eupex by introducing three new types. The new products allow users additional flexibility in their systems without losing the...

more
Issue 06/2013

Increased productivity of high powered belt conveyors

Developed especially for the drives on open-pit mining belt conveyors, the latest fluid coupling technology from Voith – the TurboBelt 780 TPXL (Fig. 1) – provides a lot of benefits. Thanks to the...

more