RU95106906A - Method and device for determining moment of inertia - Google Patents

Abstract

FIELD: mechanical engineering; determining axial moments of inertia, inertia tensors and centers of body mass on platforms rotating around random axis. SUBSTANCE: platform with shaft mounted in bearing support and carrying a body secured on it is subjected to action of torque depending on turning angle which causes oscillations around axis within permissible limits including stages of acceleration and deceleration. Measured are momentary angular velocities of rotation in certain positions of angular measuring zone located symmetrically with respect to position of system equilibrium. Measurements are used to analytically determine moment of inertia. Platform is given single dynamically asymmetric acceleration-deceleration rotation motion with sharp transfer from acceleration to deceleration. Device has base, circular container, circular platform with shaft mounted in bearing support. Container can be located and fixed in six angular positions relative to shaft axis. Unbalanced mechanism consists of two unbalanced weight resting on shaft and one of these weights can be secured on shaft. One weight is provided with stop for second weight. Base has stop which limits displacement of second weight. Platform consists of single ring turnable around its axle mounted beyond it on platform shaft. EFFECT: high accuracy, wide area of application. 2 cl, 3 dwg

Claims (1)

The invention relates to mechanical engineering and can be used to determine the axial moments of inertia, inertia tensors and centers of mass of bodies on platforms rotating around an arbitrary axis. The task of increasing accuracy, performance and expanding the scope of the application is being addressed. The essence lies in the fact that the platform with the shaft mounted in the bearing support, with the body fixed on it, is informed by the rotation angle depending on the angle of rotation, the oscillations around the axis within the acceptable limits, containing the stages of acceleration and braking, measure the instantaneous angular speeds of rotation in certain positions of the angular zone measurements symmetrically located relative to the equilibrium position of the system, which analytically determine the moment of inertia, and the platform is informed of one dynamically asymmetric acceleration ormoznoe rotation with a sharp transition from acceleration to deceleration. The device comprises a base, an annular conveyor, an annular platform with a shaft mounted in the bearing support, with the possibility of placing the container and fixing it in six angular positions relative to the axis of the shaft, an unbalanced mechanism consisting of two unbalances resting on the shaft with the possibility of fixing one of them on the shaft , one of which is equipped with a stop for the second unbalance, and the base has a stopper restricting the movement of the second unbalance, the platform consists of one ring with the possibility of rotation around the axis, mouth copulating on the platform outside the shaft.