Objective
The air bleed system is an air source both for conditioner of aircraft cabin and for de-icing systems. The main element of the air bleed is a butterfly-type valve (BV). This valve rotates on two ball bearings.
The durability and reliability problems of these bearings are defined by the following factors:
complex design;
absence of solid lubrications;
high wear;
low overhaul period (600 hours at a temperature between 450 and 500°C);
low vibration strength.
The development of new nanocomposite materials for fabrication of novel BV sliding bearings is the main goal of the Project.
The main Project scientific and technical objectives:
-development of low cost technology for synthesis of novel solid lubricant nanoparticles (inorganic fullerene-like materials IF);
-development of IF intercalation method (MS2, where M=Mo, W, Nb, Ta) with atoms of transition metals to provide their anomalous low friction properties;
-analysis and experimental study of the mechanical and tribological properties of IF-MS2 nanoparticles;
-Development of novel technology for fabrication of BV bearings with desired properties (density, micro-channels structure, strength, etc.) required for effective incorporation of IF nanoparticles;
-development of low cost innovative technology for mechanical alloying of BV sliding bearings with IF nanoparticles using original surface deformation technique;
-study of nano-granular flow in the micro-channels of the porous media with the help of a microprobe extrusion technique that permits to measure real stress-strain flow parameters in perforated samples having a network of interconnected tortuous channels;
-analysis of structure and properties of the novel sliding bearings (mechanical, friction, fatigue strength, wear resistance);
-production of pilot batches of BV bearings (according to LTS requirements) including the development of manufacturing expert system;
-development of method and software package for prediction of wear behavior and durability analysis of novel BV sliding bearings.
Expected industrial achievements related to the Project end-user industrial problems (Liebherr Aerospace Toulouse (LTS))-like the main supplier of air bleeds systems for Airbus family):
-Development of novel BV sliding bearing based on new nanocomposite materials for application in high pressure butterfly-type valve of engine air-bleed systems of conditioners of cabin of AIRBUS aircrafts (chiefly for new aircraft A380 that is characterized by increased temperature and strict requirements for durability and reliability) with the following unique operating parameters:
-dry friction at operating temperature up to 650°C;
-continuous temperature gradient between 0 and 50°C between the inner and outer rings;
-friction coefficient 0.17- 0.25;
-overhaul period about 1200 hours (improved in 2 times in comparison with existing BV bearings);
-increased in 2-3 times vibration strength.
Fields of science (EuroSciVoc)
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Keywords
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Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
61-139 Poznan
Poland
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.