Measurement ( IF 3.364 ) Pub Date : 2020-07-24 , DOI: 10.1016/j.measurement.2020.108279 Haogong Xu; Junhui Zhang; Guangmin Sun; Weidi Huang; Xiaochen Huang; Fei Lyu; Bing Xu; Qi Su
The cylinder block is the main rotating part in axial piston pump, and its dynamic characteristics can reflect the health condition of the pump more directly than the external characteristics. In this paper, a less modification measurement scheme is proposed to acquire the dynamic characteristics of the cylinder block accurately. The less modified pump minimizes the influence of the test equipment on the cylinder block motion. The radial displacements of the cylinder block surface in two cross-sections along the perpendicular directions are measured under different operating conditions. Moreover, the translational motion and the tilt behavior of the cylinder block are calculated when the run-out signals of the cylinder block surface are removed from the measurement signals. The vibration signals are measured synchronously and compared with the movement of the cylinder block. Finally, the dynamic characteristics of the cylinder block under different operating pressure are presented and analyzed in detail.