| 主权项 |
1. A device for testing the rigidity and non-linear relationship of a coupling interface for cylindrical fitting, the device comprises a frame test bench, a radial loading assembly is provided below the top board of the frame test bench downward along the vertical centerline thereof, the radial loading assembly has a structure comprising a radial perpendicular loading part over which a first force sensor, a first connector, and a first sleeve are successively provided, the first force sensor and the first connector are fixedly connected to each other via a first bolt, a lower port of the first sleeve is cup-pressed on the upper surface of the first connector, a first check ring is fixedly connected to an upper port of the first sleeve, a cylinder body of a flange sleeve cases around the outer surface of the first sleeve, a flange plate at an upper end of the first flange sleeve is fixed on an upper plane of an upper wall of the frame test bench, a radial loading screw is installed along the axis of the flange plate of the first flange sleeve and is connected with the flange of the first flange sleeve through threads; the radial loading screw passes through the first check ring downward, a first thrust bearing and a first radial bearing respectively installed on the radial loading screw at both sides of the first check ring, a first nut is provided on a tip of the radial loading screw at one side of the first radial bearing,
wherein a tip of the radial perpendicular loading part of the radial loading assembly extends into an outer housing vertical hole of a test-piece housing, and an upper plane of a bottom wall of the frame test bench is used for fixing the test-piece housing for test, a test-piece shaft is fitted and connected to the test-piece housing via the coupling interface for cylindrical fitting; radial displacement sensors a1, a2, b1, and b2 are fixed on the test-piece housing to measure a radial relative displacement of the test-piece shaft with respected to the test-piece housing. |
