THEORETICAL AND PRACTICAL ASPECTS OF THE WEAR OF VANE PUMPS .B. ANALYSIS OF WEAR BEHAVIOR IN THE VICKERS VANE PUMP TEST

The wear behaviour of the vane pump used in the standard method for in dicating the wear characteristics of hydraulic fluids (ASTM D 2882/DIN 51 389) has been examined by comparison of the calculated wear and ex perimental data using a lubricant without any additives. In addition t o the test series according to DIN 51 389, temperature profiles from t he pump have been analysed using the bulk temperatures of the contacti ng components and the temperature in the lubrication gap as input data for the wear calculation. Cartridges used in tests according to the G erman standard have been examined extensively before and after each ru n to obtain input data for the mathematical model and to locate wear. An analysis of the fluid properties and an investigation of the influe nce of wear particles in the hydraulic circuit were performed. The exp erimental results were compared with the wear prediction, which was ve rified by the agreement in terms of load, temporal wear progress and l ocal wear. Conclusions have been drawn with regard to the validity of the load assumptions and wear calculation, as well as to the limits of applicability of this method in the presence of additives.