Provmetod för olje- och partikelöverdrag från kompressor till tryckluftssystem
Compressed air is an energy source that is widely used in today's trucks and buses.Compressor located next to the engine supplies the pneumatic system with the compressed air and is lubricated with the engine oil. Some of the oil follows the air flow in both liquid and solid phase. The solid phase, namely the carbon particles are created due to the high temperature in the compression chamber.Oil- and particles carryover softens and destroys the rubber material in the air valves and disturbs the mechanical function of various components in the pneumatic system. In order to reduce oil- and particles carryover is an Air Processing System (APS) set downstream the compressor.No method for establishment of oil- and particles carryover from the compressor exists at the moment. Therefore the filtration efficiency of APS is currently unknown. For that reason a test method to determine oil- and particles carryover from the compressor to the pneumatic system is required.In order to create a new test method first a literature sources has been studied and then the analysis of previous experiments has been performed. The relevant equipment has also been examined and evaluated in this thesis work. Then the most suitable equipment has been chosen and the existing pneumatic system in the compressor rig has been rebuilt in order to implement the test method. Finally, a number of measurements has been carried out there the first part is a development part and the second one is performed to demonstrate the method's usefulness.The result of this thesis work is a newly created test method that determines the quality of compressed air in terms of concentration and size distribution of the particles both up- and downstream APS, which implies that the filtration efficiency of APS can be obtained.