| 摘要 |
A hydraulic locking and loosening device ( 40 ) is set on the neck of a rolling-mill roll or back-up roll with a conical part ( 3 ) and a cylindrical part ( 4 ), and comprising an oil-film bearing ( 7, 8 ), a spacer ring ( 16 ), a thrust bearing ( 15 ), a thrust ring ( 17 ), and a threaded lock ring ( 18 ). The locking device ( 30 ) comprises a body ( 21 ) inserted at the centre in a ram ( 22 ) to form a hydraulic actuator with two annular chambers ( 23 ), longitudinal arms ( 31 ), on each of which is provided a C-shaped notch ( 32 ), and cover ( 24 ) for closing the hydraulic chambers ( 23 ). A variant of the hydraulic locking and loosening device ( 40 ) is provided with a bayonet device for its engaging on the roll end. |
