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Historically, gearbox original equipment manufacturers (OEMs) and repair organizations have tended to offer their customers no-load, full speed (spin) tests as a standard performance test. If a load test was specified, the supplier would probably offer a locked torque back-to-back simulated load test, which requires a large investment in tooling to connect shafts of the test and slave gearboxes.
Assorted thoughts while in a holding pattern over O'Hare... I recently returned from England where I spent time checking out the overseas markets and attending a machinery auction. Buyers came to this auction from all over - Germany, Italy, Switzerland, India, Australia, America - and the prices were astonishing. Often buyers were paying in pounds sterling the same amount or more than they would have paid in U.S. dollars.
This method of testing large gearboxes or, indeed, any power transmission element, had numerous advantages and offers the possibility of large savings in time, energy, and plant, if the overall situation is conducive to its use. This usually requires that several such units need to be tested, and that they can be conveniently connected to each to each other in such a way as to form a closed-loop drive train. No power sink is required, and the drive input system has only to make up power losses. The level of circulating power is controlled by the torque, which is applied statically during rotation, and the drive speed. Principles, advantage, and limitations are described, together with recent experiences in the only known large-scale usage of this technique in Australia.
We'd like to thank our friends down at Sanderson Brothers Pty. Ltd., Thomastown, Australia, for bringing the work of Capt. S. Bramley-Moore to our attention. So, without further ado, we offer you the following poem to help you keep your gear formulae straight.
News Items About Australia
1 ANCA Pty. Invests $4 Million in Australia and Opens Thai Manufacturing Facility (April 14, 2006)
ANCA Pty. will invest $4 million in Australia and officially opened its first overseas manufacturing facility, located in the Rayong pro... Read News