Rotary extrusion test tool for checking fatigue life of elastic ring

The invention relates to the technical field of aero-engines, and discloses a rotary extrusion test tool for checking the fatigue life of an elastic ring, a sliding block applies an extrusion force to an inner lantern ring along the radial direction of the inner lantern ring by adjusting a bias pressure adjusting mechanism, and the inner lantern ring is flexibly connected with a rubber pipe, so that the fatigue life of the elastic ring can be checked. After being extruded by the force transmission bearing, the elastic ring can generate radial displacement, and the extrusion force is transmitted to the elastic ring, so that the elastic ring is extruded; besides, when the tester tool works, the rotation driving mechanism drives the rotation tool and the elastic ring to rotate together, the sliding block and the inner lantern ring are connected through the force transmission bearing, the sliding block cannot rotate along with the rotation tool, and the contact point of the sliding block and the inner lantern rin