斜板式アキシアルピストンポンプの熱潤滑特性 : シリンダブロック,斜板,弁板の温度の同時測定(機械要素,潤滑,設計,生産加工,生産システムなど)

概要

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Temperatures of the three bearing/seal parts of an axial piston pump were measured simultaneously. Five thermo-couples were embedded in the cylinder-block, four thermo-couples were in the swash-plate and four thermo-couples were in the valve-plate. Two platinum thermo resistances were placed in the suction and delivery conduits. A hydraulic mineral oil with ISO VG22 was used as the test fluid. The maximum discharge pressure was 20MPa and the maximum rotational speed was 25rps. The inlet oil temperature was specified at 20 to 40℃. The cylinder-block temperature at the bottom-dead-center of the piston was high and the temperature at the top-dead-center was low. The difference in the temperatures at both centers became large as the discharge pressure increased. The swash-plate and valve-plate temperatures were high at the delivery side and the temperatures were low at the suction side. The rotational speed less influenced the difference in the maximum and minimum temperatures in the parts. The discharge pressure markedly affected the cylinder-block temperature at the large swash-plate angle.
2009-10-25