DEVICE FOR APPLYING A PRELOAD TO A CONNECTING ELEMENT PROVIDING EFFORTS, AND APPARATUS FOR TESTING RESISTANCE TO ALTERNATIVE TRACTIONS AND COMPRESSIONS EQUIPPED WITH SAID DEVICE

摘要

The invention relates to a device for applying a pre-loading to a connection element transmitting forces, and to an apparatus for testing resistance to alternating tractions and compression, provided with this device. / P p THIS DEVICE COMPRISES A CONNECTION ASSEMBLY 40 AND A DEVICE 52, 53 INTENDED TO APPLY TO THIS ENTIRECE A STRENGTH MORE STRENGTHENING THAN THOSE WHICH IT SUBJECTS IN SERVICE, THIS CONSTRAINT APPLYING TO ONE OF THE OTHER FRONTAL SURFACES 66, 67 OF THE SAME ASSEMBLY AND CHUCK 15. THE ASSEMBLY IS PART OF THE ROD 21 OF THE PISTON 24 OF A HYDRAULIC CYLINDER AND A CHAMBER 53 OF A SEPARATE CYLINDER IS SUBJECTED TO THE PUSH OF A FLUID UNDER PRESSURE IN ORDER TO APPLY THE COMPRESSED TO THE WHOLE. / P P APPLICATION IN PARTICULAR TO EQUIPMENT FOR TESTING RESISTANCE TO ALTERNATE TENSION AND COMPRESSION EFFORTS. / P