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Proposal of new maintenance system of air brake system on semi-trailer combination aimed at increase of operational safety

Grenčík J., Ruman F.

Autobusy : technika, eksploatacja, systemy transportowe

2013

R. 14, nr 3

1385-1392

The paper deals with the proposal of new maintenance system of air brake system on a semitrailer combination. The structure of semi-trailer and the current maintenance system of trailers are described with focus on the basic air brake system design. Analysis of wear and damage of air brake system components used on the semi-trailer combination based on real experience from practice and creation of the FMECA analysis of the system using software support are presented. Based on the analysis performed, a new system of maintenance was designed which was aimed at reduction of the risk related to failure consequences. The proposed system uses RPN (risk priority number) values resulting from the proposed preventive maintenance system and is compared with the currentmaintenance system. Main objective was to reduce the impact of any failure in any component on the air brake system. On the basis of the analysis subsequently new methods of failures detection of air brake system components, preventive measures, and suggested new intervals of preventive maintenance for the air brake system are also proposed. Proposed intervals of preventive maintenance execution are based on the calculation of the total costs associated with the consequences of failuresthat may arise from them and compared with costs associated with service inspections carried out on the analysed semi-trailer fleet. The proposed maintenance system has decreased RPN values in comparison with the current system and in practical operation is expected to increase safety of semitrailer combinations, thus minimize probability of a failure in any component of the air brake system.

Plany modernizacji węzłów uszczelniających w pneumatycznych napędach hamulcowych maszyn wyciągowych

Kowal L.

Hydraulika i Pneumatyka

2007

nr 2

12-16

Opisano zagadnienia związane z modernizacją węzłów uszczelniających w eksploatowanych pneumatycznych jednoosiowych napędach hamulcowych maszyn wyciągowych. Wskazano na możliwość zastąpienia uszczelnień skórzanych uszczelnieniami wykonanymi z nowoczesnych materiałów. Zaproponowano cykl badań stanowiskowych obejmujących sprawdzanie szczelności napędów z nowymi węzłami uszczelniającymi.

The article describes problem of modernization of seals joint in working one-axis brake systems of winding engines. It was suggested to replace leather seals with new materials. The author proposed series of experiments to test leakages in drive systems with new seals joints.