Double torsion bar moment of inertia measuring device

Abstract

The invention discloses a double-torsion-bar rotational inertia measuring device and belongs to the technical field of mechanical measuring. The double-torsion-bar rotational inertia measuring device aims at solving the problem that the measuring range of a single-torsion-bar measuring method in the prior art is limited to a certain extent. The double-torsion-bar rotational inertia measuring device comprises a horizontal torsion plate, a swing needle, a groove-shaped photoelectric sensor, a torsion bar shaft, a supporting sleeve and a device shell. The swing needle is fixed to the lower end of the torsion plate and swings in a groove of the groove-shaped photoelectric sensor fixed to the device shell. The torsion bar shaft is fixed to the bottom face of the torsion plate through a bearing, the torsion bar shaft and the torsion plate are coaxial, the lower end of the torsion bar shaft is fixedly connected with the supporting sleeve through a fixing bolt, and the supporting sleeve is arranged in the device shell and is fixedly connected with the device shell. The torsion bar shaft comprises the two ends of a first torsion bar and the two ends of a second torsion bar, a bolt hole in the horizontal direction is formed in the joint of the first torsion bar and the second torsion bar, and fixing and loosening of the joint of the first torsion bar and the second torsion bar and the supporting sleeve are achieved through plugging and unplugging of the movable bolt.

Description

technical field [0001] The invention belongs to the technical field of mechanical measurement, and in particular relates to a measuring device for moment of inertia of a double torsion bar. Background technique [0002] Generally, there are many methods for measuring the moment of inertia of an object, the most common ones are compound pendulum method, line pendulum method and torsion pendulum method. What they have in common is that an external force is applied to the measured object to destroy the static balance of the system. After the external force is removed, the measured object swings freely. By measuring its swing period, the moment of inertia of the measured object around the rotary axis can be calculated. The error of the compound pendulum method mainly comes from the assumption of a small pendulum angle, frictional resistance and air resistance, and the compound pendulum method is not suitable for the measured object with large mass. Using the wire pendulum metho...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a double torsion bar moment of inertia measuring device to solve the problem that the measurement range of the single torsion bar measurement method in the prior art has a certain limit

Images