| 摘要 |
A rotary union includes a non-rotating machine component having a receiving counterbore (114), a media channel opening (112), and a control channel (118). A housing (106) is positioned within the receiving counterbore and has a bore and a control chamber (136) in fluid communication with the control channel. A non-rotating seal member (104) is slidably and sealingly disposed within the bore in the housing and has a media channel in fluid communication with the media channel opening and the receiving counterbore. The non-rotating seal member can be selectively extended or retracted within the bore of the housing, such that selective engagement of a face seal is accomplished under different operating conditions of the rotary union. |
