| 摘要 |
PURPOSE:To reduce a noise caused by vibration of a delivery valve, by providing a supply oil groove, through which a delivery valve chamber communicates with a vertical hole in the back part of a vane groove provided in a cylinder, being placed facing in the direction of a delivery hole on the upper surface of the cylinder. CONSTITUTION:If a roller 8 eccentrically rotates, a vane 9, adapted to the roller 8, reciprocates in a vane groove 14. A vertical hole 15 is provided in the back part of the vane groove 14, and a supply oil groove 16, through which the vertical hole 15 communicates with a delivery valve chamber 10, is provided in the upper surface of a cylinder being directed in the direction of a delivery hole 11. Accordingly, a delivery valve 12 and a valve retaining plate 13 are continually placed in a wet condition by lubricating oil 17, causing vibration of the delivery valve 12 to be suppressed by damping action of the lubricating oil 17, and a noise, caused by the vibration of the delivery valve, can be reduced. |
