Turbocharger repair and balancing bench

The bench is used in turbocharger repair sections of diesel locomotive depots. It combines two operations: disassembly and assembly of the unit on a rotating fixture with controlled force, and dynamic balancing of the rotor after replacement of the turbine or compressor wheels, bearings or labyrinth seals. Balancing the assembled rotor eliminates excessive vibration and bearing wear after the turbocharger is installed on the engine.

The rotor is placed by its journals on the roller supports of the balancing machine and driven by a belt drive. Piezoelectric sensors on the supports measure vibration, and the processing system calculates the magnitude and angle of unbalance in each correction plane and displays the result on screen. The operator removes the unbalance by taking off metal in the indicated zones or fitting balancing weights, after which a check run is performed.

The assembly and disassembly fixture has a rotating head with locking every 90°, clamping elements for the turbocharger housing and a hydraulic puller for pressing the wheels off the shaft. The balancing machine is built on a rigid bed with adjustable support spacing and a protective guard. Both stations are tooled for the customer's range of turbochargers; fixtures for checking shaft runout and bearing clearances are supplied additionally.