Simultaneous Measurement of Sliding-Part Temperature and Clearance Shape of A Slipper Used in Swashplate Type Axial Piston Motors

Temperature and behavior of a piston motor slipper were examined using a test rig. The experimental setup comprised a tester, a hydraulic circuit, control units, and measuring instruments. The tester included a servomotor and a chamber enclosing two piston assemblies with slippers, a rotating disk, displacement sensors, and thermocouples. The sliding surface diameter of the test slipper was 32 mm; the test oil was hydraulic oil with VG46. Tests were conducted at supply pressures up to 35 MPa, rotational speeds up to 26.7 s −1 , and oil temperature of 30-50°C. The pad temperature increased with the supply pressure and rotational speed. The pad established a temperature gradient, being maximized near the slightly-outer trailing edge and minimized near the leading edge. The temperature differences were influenced by the rotational speed, but were almost independent of the supply pressure.

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“…The experimental setup consisted of a tester, measuring instruments, control units, and a hydraulic circuit 26) . The tester (see (2)…”

Section: Methodsmentioning

confidence: 99%

“…In all plots, the oil temperature t c is30°C.The h c was estimated by averaging the measured data at three positions. The angle  and azimuth  were also calculated from the clearance sensors' data26) . As the p sincreased and the rotating speed N decreased, the clearance h c decreased.…”

mentioning

confidence: 99%