PSI - Issue 35

Gaston Haidak et al. / Procedia Structural Integrity 35 (2022) 124–131 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 6. Measured pressure and axial forces with applied loads 30 bar (a) and 45 bar (b).

To better make a comparative study, we applied two different applied load values (30 and 45 bar). Thus, we can observe the variation of the outlet pressure in Fig. 6 (a) for 30bar and Fig. 6 (b) for 45bar. First, we measured the temperature and fluid film thickness for these two applied load values (inserted sensors described in Part 2). Subsequently, we used the same values of these applied loads for simulating the fluid film thickness.

Fig. 7. Fluid film thickness (left) and temperature (right).

The problem of damage and failure on the interface between the slipper and swashplate is mainly due to lousy lubrication. Therefore, it is essential to pay more attention to the most critical parameters involved in this mechanism, especially regarding the characteristics of the lubricant. Here we considered two parameters, the fluid film thickness and the oil temperature, in addition to the deformation. Based on the results in Fig. 7 (a), we can see that experimental and simulated results of the oil film thickness are close, and the fluid film lubrication is lower when the pressure is higher. Similarly, the temperature rises with the applied load, referring to Fig. 7 (b).