| 摘要 |
The invention relates to a journal bearing (JB) for supporting a rotor shaft (RS) extending along a rotor axis (X) comprising a support element (SE), and at least two pads (TP) for supporting said rotor shaft (RS), wherein said pads (TP) are supported by said support element (SE), wherein said pads (TP) respectively comprise a bearing surface (BS), wherein said support element (SE) and pads (TP) comprise a support (SUP) for each pad (TP), wherein said support (SUP) for each pad (TP) comprises means to enable tilting for each pad (TP) around a tilt axis (TX) extending parallel to said rotor axis (X), wherein said journal bearing (JB) is assigned to a specific default rotation direction (RD) of said rotor shaft (RS), wherein tilting of said pad (TP) respectively into said rotation direction (RD) is positive tilting (PT), wherein tilting of said pad (TP) versus said rotation direction (RD) is negative tilting (NT), wherein said pad (TP) is during a design speed operation of said rotor shaft in a neutral tilting position, wherein said support (SUP) is designed such that said positive tilting is enabled and limited from said neutral position (NTA) to a certain positive tilting angle limit (PTAL) and that said negative tilting (NT) is enabled and limited from said neutral position (NTA) to a certain negative tilting angle limit (NTAL). To minimize vertical shaft sink the invention proposes to design said support (SUP) and pad (TP) such that said negative tilting angle limit (NTAL) is between 0% and 50% of said positive tilting angle limit (PTAL). |
