SU111221A1 - Mirror torsiograph to determine the power transmitted by the shaft and its torsional vibrations - Google Patents

Description

To determine the power transmitted by the shaft and its torsional vibrations, mirror torsiographs are usually used that contain a light source mounted on the shaft under study, a system of mirrors and a device for photographic recording.

The described invention makes it possible to simplify the adjustment of the sensitivity of such torsographs. For this purpose, the working mirror of the torsiograph is fastened to the end of the flat spring, which is mounted on a shaft mounted on the shaft and bent by a finger of the second clip located on the shaft, at some distance from the first.

FIG. 1 is a schematic diagram of the proposed torsiograph; in fig. 2-diagram of the installation of its working and control mirrors.

On the shaft under study / the collar 2 is fixed with a cantilever mounted flat spring 3, on which the working mirror 4 of the torsograph is located. At some distance from

collar 2 has a second collar 5 with a finger 6 acting on the spring 3. When the shaft / shaft 6 is twisted, finger 6 bends the spring 3, which causes the mirror 4 to rotate around the radial axis at an angle в, the value of which depends on the shaft deformation and the ratio of the base / to the cantilever length plot a spring. The spring 3 is fixed in the collar 2 by a replaceable nut 7, the shape of which determines the length of the section a. The spring shank attached to the clamp 2, so that the change of the crackers 7 can be made on the installed device without disturbing its settings.

On the collar 5 there is also a spherical concave mirror 8, a lantern 9 with a slit and a cassette with a moving film W. Elements 8, 9 and 10 are removed from mirror 4 at a distance b equal to half the radius of curvature of mirror 8.

Mirror system 4 w. 8 projects the slit of the flashlight 9 onto the film 10. Therefore, when the mirror 4 is rotated by an angle into the slit image, it moves by an amount L 46

be directly counted after the film has been developed. A light time stamp from the contact chronometer is also applied to the film.

A mirror-control mirror 77 is placed above the mirror 4, the lantern 9 projecting the slit 9 on the base 10, for each revolution of the shaft / it overlaps for some time by the screen 12.

A second optical system is installed outside the shaft, in which the film is replaced by a scale 13 for an approximate visual estimate of the angle 0. This system operates during the moments when rays from the mirrors 4 and 11 pass through it.

The torsiograph is calibrated using a simple device, which allows to determine the dependence of x on the angular displacement of the clamps or

(with joint calibration with the shaft) from the torque applied to the shaft.

Subject invention

A mirror torsiograph for determining the power transmitted by the shaft and its torsional vibrations, containing a source of light installed on the shaft under study, a system of mirrors and a device for photographic recording, characterized in that, in order to simplify the adjustment of the sensitivity of the torsograph, its working mirror is fixed on the end of the flat spring , cantilever-mounted interchangeable crackers on the clamp mounted on the shaft and bent when the shaft is twisted by the action of the finger of the second clamp located on the shaft for some distance Nii from the first.