The invention relates to a method for compacting anodic paints by means of sandblasting, which comprises directing at least two jets (3) of an abrasive material toward a part (1) covered with the paint, said jets being directed in a convergent manner and meeting at a focal point (4), characterised in that said focal point is located upstream from the part (1).
B24C 1/10 - Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
B24C 3/02 - Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
C23C 30/00 - Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
F23R 3/00 - Continuous combustion chambers using liquid or gaseous fuel
2.
METHOD FOR CREATING A CONNECTING ELEMENT POSITIONED BETWEEN TWO COMPONENTS OF A STRUCTURE, CONNECTING ELEMENT AND BYPASS TURBOJET ENGINE COMPRISING SUCH A CONNECTING ELEMENT
According to the invention, the method for creating a connecting element (12), arranged between two components (5, 11) of a structure (1), notably of a turbojet engine structure, which is subjected to compressive and/or tensile loadings and which is formed of a hollow shaft (14) immersed, at least partially, in a stream (Ff) of air flowing between the two components (5, 11), is characterized in that it involves the following steps: the width of the main cross section associated with the shaft (14) of the connecting element (12) in a direction orthogonal to the longitudinal axis of the shaft is sized according to the desired mechanical strength and the desired mass, and according to characteristics of the airstream (Ff); and the external surface of the shaft (14) of the connecting element (12) is worked, at least over part of this surface, to give it a surface finish the arithmetic mean roughness of which is at least equal to 20 microns, so as to reduce the drag of the connecting element thus dimensioned by comparison with a smooth connecting element of the same diameter.
F01D 25/28 - Supporting or mounting arrangements, e.g. for turbine casing
F02C 7/20 - Mounting or supporting of plant; Accommodating heat expansion or creep
F02K 3/06 - Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low-pressure outputs, for augmenting jet thrust, e.g. of double-flow type with front fan
F01D 25/16 - Arrangement of bearings; Supporting or mounting bearings in casings
The present invention relates to a device (8, 9, 10) for uncoupling a bearing carrier (7) in a turbomachine, the bearing carrier comprising an upstream part (5A) and a downstream part (6A) comprising a plurality of upstream orifices (5B) respectively facing a plurality of downstream orifices (6B), the uncoupling device (8, 9, 10) comprising rupture screws (8) each passing through an upstream orifice (5B) and a downstream orifice (6B), and at least a means (10) of double centring of a rupture screw (8) with respect to said upstream orifice and to said downstream orifice respectively. According to the invention, the means (10) of double centring is firstly independent of the upstream and downstream parts of said bearing carrier (7) and of the rupture screw (8), and secondly is able to collaborate with the upstream part (8A, 8C) of the rupture screw (8) in such a way that when said rupture screw breaks, said upstream part (8A, 8C) carries with it said means (10) of double centring. The invention also relates to a turbomachine comprising such an uncoupling device.
F01D 21/04 - Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to undesired position of rotor relative to stator, e.g. indicating such position
F01D 25/16 - Arrangement of bearings; Supporting or mounting bearings in casings
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