| 摘要 |
A seal arrangement ( 73 ) is provided in which seal elements ( 77 ) incorporate passages ( 90 ) allowing an air flow to be presented to tip edges ( 78 ) of the seal elements, in order to create air suspension and diminish excessive wear. These passages ( 90 ) are created by recesses in the respective adjacent juxtaposed seal elements ( 77 ). In a seal assembly ( 71 ) a seal arrangement ( 73 ) is secured within a float chamber ( 70 ) whereby radial movement is allowed to accommodate for movements in the shaft ( 72 ). The radial movement is resisted by a bias created by air flow ( 86 ) into the float chamber ( 70 ). The air flow ( 86 ) may also be presented through the passages ( 90 ) in order to create the desired air suspension of the seal elements ( 77 ).
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