Torsional Couplings

Raja Lovejoy Torsional Couplings from jbj Techniques Limited 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. Our engineers can analyze the application with their computer programme and determine the exact coupling needed for almost any application. The LF family is a rubber-in-compression coupling designed for a wide range of applications such as generators, pumps, compressors, front power take-off, etc. The largest size, the LF400, can transmit up to 5,000 Nm of torque. These are available in a range of shore hardness. The LF is one of the most versatile couplings available, it can be adapted to many configurations such as shaft-to-shaft, engine flywheel mounts, or floating shaft. It not only provides torsional protection but also absorbs shock loads and can tolerate misalignment. For direct-mounted, diesel-driven hydraulic pumps, the LF coupling in Hytrel? and a LK coupling are available. These are very stiff couplings designed to shift critical speeds well above the operating range. When the inertia of the driven (hydraulic pump or pumps) is small compared to that of the driver (the diesel engine), a stiff coupling such as the LF Hytrel? or LK is required. Hydraulic pump drives are a fast-growing segment of the market, particularly in smaller diesel engine drives. Applications include crawler tractors, manlifts, compactors, skid steer loaders, excavators and forklift trucks. Both the LF Hytrel? and the LK have many thousands of hours of successful service in a wide variety of applications around the world. Torsional couplings are designed primarily to fit standard installations such as those specified by SAE. We can solve torsional vibration problems. Also if necessary, our engineers can analyze coupling failures. For assistance please contact: jbj Techniques Limited technical office, tel:+44(0)1737 767493 or email:info@jbj.co.uk

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