| 摘要 |
A method and a expansion plug for removably plugging a channel (2) in an element (1), particularly a hollow turbine shaft, the expansion plug being inserted into the one end of the channel and expanded therein. For this purpose a plug is used of the kind comprising a sleeve (4) whose outer wall (5) having such dimension that the sleeve can easily be inserted into the channel. The inner wall (9) of the sleeve is slightly conical. A conical stopper (11) is arranged in the sleeve (4) in order to expand the sleeve (4) by axial displacement therein, to engagement with the channel wall. The end of the sleeve (4) with larger diameter is closed. The plug is provided with a channel (18) extending between these two ends. Oil is forced through the channel (18) to a closed space (14)between the inner end of the stopper (11) and the closed end of the sleeve (4) to cause expansion of the plug. The plug (3) is dismantled by injecting oil between the stopper (11) and the inner wall (9) of the sleeve (4) through the channel (20) extending between the exposed end surface of the plug (11) and the curved surface (12) of the plug (11). |
