Couplings for Mobile Hydraulic Applications

For applications with diesel, gasoline or natural gas engines which drive one or more flange-mounted hydraulic pumps.

This range of torsional couplings solve torsional vibration problems typical of those found in diesel engine applications. The torsional coupling dampens torsional vibrations and tunes the system to have critical speeds outside the operating range. jbj Techniques Ltd can analyse the application and determine the exact torsional coupling needed for almost any application.

» Low weight.

» High torsional stiffness.

» Long service life.

» Maintenance-free.

» Series for SAE flywheels.

» Multiple or single units available.

The three main variants are the LF torsional coupling, the LK torsional coupling and the LM torsional coupling system:

The LF torsional couplings have substantial shock, vibration and misalignment capabilities, maintenance free, fail-safe operation.

The basic component of the LF torsional coupling is the unique and highly versatile elastomeric element. This element can be easily mounted in a number of different ways depending on the application, and without special design changes or complex hardware modifications. The element, which is available in different materials for optimum performance, is connected to a cylindrical hub with radial screws and then to a flanged hub by axial screws. This unique coupling design is remarkably simple, highly effective, and gives the LF torsional coupling unmatched performance capabilities.

LK torsional couplings are usable with all engine-driven hydrostatic applications in the low to mid power range. They are maintenance-free and are characterized by low weight, high torsional stiffness and long service life. Their performance spectrum includes all ranges from 125 to 6,000 Nm. The shape and length of the hubs are modifiable, different flange positions are possible. Various series are available for standardized SAE flywheels and non-standardized flywheels.

The LM torsional couplings are made especially for diesel engine drives. In particular, the LM couplings are highly elastic torsionally, allowing the engine to drive a relatively small inertia load safely from damaging torsional resonance over a wide speed range from low idle RPM to full engine speed. They accomplish this task by shifting the critical speeds far enough below the idle speed to allow full use of the entire working speed range of the engine without limitation. In essence these sophisticated couplings effect an attenuated level of stress throughout the whole drive train by reducing vibratory torque to a very low level.

Assistance to select the correct coupling: If you would like assistance in selecting the correct model and size coupling for your application please fill in the form on page 7 of www.jbj.co.uk/e-publications/Torsional-couplings-from-jbj_Techniques_Limited/7/index.html by downloading it, completing it and email or fax to the jbj Techniques technical office email: info@jbj.co.uk or fax: 01737 772041 and we will contact you as soon as possible with recommendations for the right coupling for you mechanical power transmission application. Thank you.