| 摘要 |
<p>An adjustable oil metering valve for compressed air lubricators includes a lower, fixed member (20) having a central, downwardly extending oil delivery nozzle (30) and a peripherally ramped upper surface (29). Seated on surface (29), and rotatable relative thereto, is a valve member (21) comprising lower disc portion (31) having radial channel (35) in its lower surface. The lower surface portion (31) and the peripherally ramped portion of surface (29) of member (20) define peripheral gap (H) of progressively varying height into which the oil is fed. The oil flows to the nozzle (30) via the channel (35). The rate of flow of oil to the nozzle (30) is substantially proportional gap (H) which in turn is determined by the angular location of the outer end of channel (35) which is selectively varied by rotating valve member (21). The valve may largely comprise plastics mouldings.</p> |
