| 摘要 |
The invention, according to a depicted embodiment thereof, is incorporated in a scroll-type compressor. The compressor has a drive shaft which terminates in an eccentric socket. The socket, serving as a journal, slidably engages a hollow hub centrally located on the moving or orbiting scroll element. The hub comprises the bearing surface for the shaft socket/journal. A lubricant channel is formed in the orbiting scroll element, and it opens into the hollow of the hub. Lubricant travels, by gravity, from the channel along the inner surfaces of the hub toward the lower side of the hub and socket engaging surfaces. In order that a supply of lubrication will be on hand, with initial start-up of the machine, a ring is fitted into the outer end of the hub to define a dam. The dam wells up with lubricant during a first operation. Thereafter, it displaces lubricant therefrom, with each succeeding start-up of the machine, to the socket and hub interface. Accordingly, even if the compressor lubrication system delays a delivery of lubricant to the channel, the lubricant displaced from the dam is sufficient to prevent galling or seizure of the socket and hub (journal and bearing).
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