EC225 - Bevel Gear Vertical Shaft Process

Transmission of power from the turbine  engines to the rotor takes place via the  main rotor gearbox within the main rotor  gearbox the bevel gear shaft contributes  to the reduction of speed and ensures  drive of lubrication pumps how is it  made.

 The steel used is vacuum remelted  and heat treated which provides for very  good mechanical properties in addition  preliminary material quality checks are  carried out before any manufacturing  begins  each blank is identified by a batch  number that ensures traceability of the  raw material.

A new generation of gear  cutting machines is used to produce  spyro conical teeth of high robustness  and accuracy niche riding this process  is often repeated in order to improve  the properties of the meshing surfaces  thus improving the life of the parts the  finished tolerance of the teeth is to a  few microns which provides a high  quality of meshing thus ensuring high  reliability machining limitations  require that all shaft bevel gears be  made in two parts.

The gear and vertical shafts are  assembled by electron beam welding this  process is computer monitored and a fine  focus control allows accurate  positioning of the world  the quality of the world is checked by  ultrasonic and radiographic methods  these measures show a solid high quality  reinforced weld  metallurgical inspections validate the  integrity of the mechanical parts.

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