FIELD: machine building.
SUBSTANCE: turbine component comprises a hollow aerofoil and an impingement tube disposed within the hollow aerofoil. Hollow aerofoil comprises a cavity having opposed rear and fore portions, defined by interior surfaces of respective trailing edge and leading edge regions of the hollow aerofoil. Rear portion includes a sharp edge portion, and the fore portion includes a substantially cylindrical portion, the sharp edge portion of the rear portion of the cavity having a curved and/or twisted shape with a sharp edge at an end. Impingement tube is formed from two separate sections corresponding to a rear section and a fore section, configured to extend spanwise through the hollow aerofoil and having the same contour as the respective rear and fore portions of the cavity. Rear and fore sections of the impingement tube are connected together by a locking device, that is insertable into the hollow aerofoil and fixes the impingement tube in the locking engagement in the cavity of the hollow aerofoil. Locking device is a roll pin located axially between the rear and fore sections of the impingement tube, and has an extension in the radial direction of the hollow aerofoil. Another invention relates to the above-mentioned impingement tube. When assembling the impingement tube in the hollow aerofoil of a turbine component, the rear section of the impingement tube is introduced into the hollow aerofoil manoeuvring the rear section in a direction of the trailing edge region of the hollow aerofoil into a position in the rear portion of the cavity of the hollow aerofoil. Next, the fore section of the impingement tube is inserted into the hollow aerofoil adjacent to the rear section, the rear and fore sections are connected to each other by inserting a locking device into the hollow aerofoil for fixing the impingement tube in place.
EFFECT: group of inventions makes it possible to simplify the assembly of the impingement tube and the hollow aerofoil having a twist.
8 cl, 2 dwg
