High Pressure Turbine (HPT) Blades Washer – Case Study 1000

by bettereng1neer1ng / 12 August 2015 / No Comments


Hundreds of “Fins” surround the center “Rotor” section of Jet Engines. These fins are actually high pressure turbine (HPT) blades which are very complex. The surface of the part is peppered with tiny EDM holes which lead to a central cavity and larger “root holes” in the rectangular end.

Parts Cleaning Problem

These blades eventually wear down from air friction and have to be rebuilt. Metal is added, the ends are re-contoured, and EDM holes are re-cut. After being rebuilt, the parts have to be cleaned – EDM slag removed, dielectric fluid removed, etc. The previous method of cleaning was slow and cumbersome.

The System / Solution

Flush, don’t spray… Put the parts inside a sealed box which is divided into upper and lower chambers. The “root” end of the parts slide into a UHMW strip which then becomes the barrier between the upper and lower chambers of the box.  The system is a two tank “PCS” system with a vertical pneumatic doorway. Inside, there are three (3) boxes in which the parts are flushed. The fronts of the boxes hinge downward. Solenoid valves control the openings to the top and bottom halves of each flushing box. All wetted parts are stainless steel.