SU1442823A1 - Optical method of aligning shaft - Google Patents

Abstract

The invention makes it possible to verify the centering of several shafts of the ship mechanism. The aim of the invention is to control the centering of the second shaft also by measuring the angular mismatch between two reflected beams from the target mark located on its frame. The laser radiation is sent along the axis of the shafting, it is divided into two target signs, each of which is mounted on the end of one of the monitored shafts. The laser beam from one of the target marks 6 is returned to the screen 3 coaxially located with the laser 1, and the beam reflected from the second target mark 7 is projected onto the second screen 8, its stable position is achieved when the target mark 7 is rotated by the inclination of its mirror. The given angular position is fixed along the angle bar of the target mark, the fiber is rotated by radiation from the second target mark 7 onto the screen 3 coaxially located with the laser 1. The angular position of the mirror of the second target mark 7 is fixed again, and the axes of the second shaft are determined by fixed values relative to axis 9 of the first shaft. 1 il.

Description

The invention relates to a measurement technique and can be used in the installation of ship machinery.

The purpose of the invention is to expand the functionality by also providing the mutual centering of the two shafts.

The drawing shows a schematic diagram of the centering of the shafts of the ship's mechanism by the proposed method.

The scheme includes laser 1, bracket 2 in which the laser is installed, the first screen 3 coaxially mounted with laser 1, the target 4 realizing the theoretical axis of the shaft guide, the translucent beam-splitting plate 5, the first target mark 6 mounted on the end of one of the centered shafts, the second target mark 7, mounted on the end of another centered shaft and the second screen 8 with a measuring grid. Both target marks 6 and 7 are identical and each target mark contains a mandrel, a mirror installed in it with the possibility of angular rotation, a stamp with concentric circles and a reference scale of rotation of the mirror (not shown). Brand is parallel to the mirror.

The two centered shafts have axles 9 and 10. The ship mechanism 11 can be moved using the tool 12.

The alignment of the shafts is carried out as follows.

The laser 1 is moved on the bracket 2 so that the center of the laser beam is aligned with the theoretical shaft axis set by target 4. The ship mechanism 11 is moved using the displacement device 12 so that the center of the circular target sign 6 coincides with the center of the laser beam projection mirrors the laser beam hits screen 3. Then rotate the target sign 6 with the mirror and observe the trace of the reflected beam on screen 3. If the trace of the projection of the laser beam does not coincide with concentric deposited circles on the screen m 3 is produced not inclination marine mechanism 11 using the tool 12 to align the beam track center. on screen 3 with one of its circles. The coincidence of the center of the projection of the laser beam with a circle on the screen 3 when turning the target mark 6 by 360 ° indicates that the shaft axis 9 is centered along the shaftline axis.

After the shaft axis 9 is centered in the path of the laser beam, a translucent beam-splitting plate 5 is installed and the beam reflected from it is directed to the second target mark 7 located at the end of the second shaft centered (axis 10). By changing the position of the plate 5, the projection of the center of the reflected laser beam from the center of the target mark 7 is achieved. After that, the reflected

five

five

0 0

g 0

about 5

0

five

from the target mark 7 the beam trace on the second screen 8. Turn the target mark 7 around the axis 10 of the second shaft to discrete angles equal to 90, 180, 270 and 360 °. In this case, the centers of the spots are fixed on the screen 8 and the centers of the fixed diametrically opposite spots on the screen are connected. The center of intersection of two straight lines connecting the centers of the spots through an angle of 180 ° is found. The position of the target mark 7 is changed by means of adjusting screws (not shown) until the beam reflected from it is aligned with the found center. Make cont. Rotate the target sign 7 with a 360 ° mirror. If the beam reflected from the mirror is not displaced from the center found on the screen, it means that the surface of the target mirror 7 is perpendicular to the axis of rotation 10 of the shaft. Fix this position of the target mark 7.

Then, target sign 7 is rotated relative to the fixed position until the projection of the beam reflected from it is aligned with the center of screen 3, as a result of which the beam reflected from target sign 7 is aligned with the incident beam. On the reference scale of the angular position of the target mark 7, its angular position is again fixed. The half angle between the two fixed values of the position of the target mark 7 characterizes the angular rotation of the axis 10 of the second shaft relative to the axis 9 of the first shaft.

For the further exhibition of the second ship mechanism, the mirror of the target mark 7 is rotated by half of the angle found, after which the center of the laser beam reflected from the target mark 7 is extended to the shaft axis 10.

Claims (1)

Invention Formula The optical method of centering the shaft, which consists in directing the laser beam along the theoretical axis to the target mark located at the end of the shaft centered, rotates the target mark on the shaft around its axis, sees on the screen coaxially aligned with the laser, the trace of the reflected beam and the position of the beam trace with respect to concentric circles on the screen is used to center the monitored shaft, characterized in that, in order to expand the functionality by providing also mutual centering of two shafts, pre-set the target mark on the second shaft, divide the laser beam into two, direct the reflected part of the beam to the second target mark, align the center of the beam with the center of the target mark, and then observe the trace of the reflected beam from the second target mark on the second screen located in the direction of the reflected beam 1442823 34 ka, the position of the trace zeitra is fixed by the beam position of the sign, the reflection of the target beam from the target sign with the incident, each time by 90 °, the centrifugal re-fixing of the angular intersections of the direct connecting the opposing target sign is found, half the The posi tive centers of the detected traces5 of the difference between the fixed values of the screen, combine the trail with laser beams of angles and, based on the value found with the center found when turning the target-angle center the second shaft relative to the first sign by tilting it, fix the corner first.