Hydraulikpumpe als umweltverträgliches Tribosystem durch PVD-Beschichtung

Hydraulic systems are commonly used in agricultural engineering due to their high power density, various fields of application and the small required installation space. The use of hydraulic oil is connected to an ecological danger due to leakage. The Collaborative Research Centre (CRC) 442 of the German Research Foundation (DFG) has developed ecologically acceptable tribosystems which operate with lubricants compatible to the environment. The examinations within this context were conducted without additives. A hydraulic axial piston pump was examined and has shown good properties concerning friciton and wear. This has been realized by using synthetical esters and PVD-coatings (physical vapour deposition).