Prescreening the ISO20763 & ASTM D7043 Vickers Vane Pump tests

WHY

The standard method for evaluating anti-wear of hydraulic fluids in a vane pump, is by the 100 hour ASTM or 250 hour ISO method, using a real Conestoga-built vane pump.  This method takes a long time to run, and requires a lot of fluid.  This makes it difficult to use the method for development or research.

HOW

 We have used some special test specimens - designed for the Falex Multispecimen machine - that recreate the vane contact vs. the ring and the pressure pulses created by the inlet and outlet ports.  By using these custom specimens and a recirculating oil system, we can run a wear test with similar test conditions, in 22 to 44 hours.  By careful experimental design, we can run the test without creating excessive heat or failure, mimicking the normal working conditions of a vane pump.

 

RESULT 

we can simulate the same wear mechanism as in the Vane pump test (and as in real vane pumps) we can rank the wear rate of different hydraulic fluids, correlating with the wear rate ranking in the Vane pump test

• we can monitor in situ the coefficient of friction and online wear, giving us more information about the mechanism and evolution during the test
• we can avoid the excessive heating of the test specimens

 for more information, download our presentation from STLE 2019 here : Vane pump test prescreening Falex Multispecimen 

and publications here :  Wear_article