Axle & Shaft Test Rigs

...for endurance study of SUV rear-axles and propeller shaft

Axle and Shaft Test Rigs

The Axle and Shaft Test bench is built for Performance and Endurance study of the SUV rear-axles and propeller shafts, based on the concept of Dynaspede’s proprietary Di-Vector technology.

This design is based on the concept of deriving the speed and torque from two independent sources with no interaction between the two. In this concept, the rear-axles are connected back to back and run at required speeds by a relatively low power motor which has to overcome only the frictional losses in the mechanical system running at maximum speed. The desired torque is applied from an independent source that provides a relative twist between the two transaxles.

Thus the two test axles with associated propeller shaft form a synchronous mechanical loop that can be rotated from any one of the shafts, so that all elements forming this loop will be rotating at the same speed. A driving motor external to this synchronous mechanical loop is speed controlled by an adjustable speed drive so that it can be rotated at the required speeds for testing. Noise suppressing enclosures are provided over the rotating components of the test rig. The torque transmitted by the axles and shaft can be remotely controlled under static and dynamic conditions by Dynaspede’s unique torquing unit, essentially a combination of heli-planetary form of differential transmission with a motorised torque source at its input.

Another salient feature in this test rig is simulation of vehicle turning condition. Dynaspede’s innovative ‘over-drive’ mechanism enables the test axles output to run with a definite differential speed between them. The differential speed along with the periodicity at which the turning is to be simulated, and the test cycle configuration can be set on the PC and the rig can be run un-manned for long durations accordingly.

A Remote Control Panel contains all electrical and electronics needed for conducting auto / manual mode of testing. This panel also includes the computer console, application specific cards, PLC, signal conditioner and associated computer peripherals including the UPS and the printer. The parameters of interest such as Input speed, Input torque, Input power, Output speeds, Axle Temperature etc are monitored on the PC screen and the same are stored for analysis.

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