| 摘要 |
A shaft ( 12 ) for a pump ( 10 ) or other rotating machine, made substantially out of only engineering plastic-such as the polymer PEEK or some other selected polymer-and including portions having respective surfaces ( 12 a-d) serving as bearing surfaces, the shaft ( 12 ) thus integrating the functions of both a shaft structure and a bearing structure. In some applications, the shaft ( 12 ) includes both portions having respective surfaces serving as radial bearing surfaces ( 12 a-b) and also portions having respective surfaces serving as thrust bearing surfaces ( 12 c-d), all made from the same engineering plastic as the rest of the shaft ( 12 ) and formed as part of the shaft ( 12 ). The engineering plastic may include one or more additives such as PTFE or carbon fiber, especially in case of dry-run applications.
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