Application of a laser tracker in the measurement of coaxiality of hollow shafts of a large-scale ball mill

Abstract

The invention relates to the installation of a large-scale ball mill, and especially relates to the application of a laser tracker in the installation of the large-scale ball mill. The application of the laser tracker in the measurement of the coaxiality of hollow shafts of the large-scale ball mill comprises the following steps: the step 1) erecting the laser tracker on site; the step 2) correcting the laser tracker; the step 3) collecting data, the data being collected by utilizing a target ball; and the step 4) processing the data, building a three-dimensional graph of the feed-end hollow shaft of the ball mill, a three-dimensional graph of the discharge-end hollow shaft of the ball mill, three points on the center line of the feed-end hollow shaft as well as three points on the center line of the discharge-end hollow shaft, wherein the three points comprises two end points and a middle point, establishing a common axis line between the two shafts with the middle point of the feed-end hollow shaft and the middle point of the discharge-end hollow shaft, and measuring and comparing the distance from the two end points of the feed-end hollow shaft as well as the two end points of the discharge-end hollow shaft, four points in all, to the common axis line, the maximum distance value being the coaxiality value of the hollow shafts of the large-scale ball mill. According to the application in the invention, other auxiliary measurement tools are not needed; measurement precision is high; and measurement result is accurate and reliable.

Description

technical field [0001] The invention relates to the installation of a large ball mill. In particular, it relates to the application of laser tracker in the installation of large ball mills. Background technique [0002] The hollow shaft of the ball mill is the most important link in the installation of the ball mill. The installation accuracy of the hollow shaft directly affects the normal operation of the equipment. If the coaxiality deviation of the hollow shaft is large, it will inevitably cause wear to the hollow shaft and reduce the service life. In the past, the traditional method of hanging steel wires was often used to detect the coaxiality of the hollow shaft of the ball mill. Steel wires can be hung inside the two hollow shafts to measure the curvature. Hang the vertical line to determine the center points of the upper and lower surfaces and ensure equal division; divide the upper and lower center points equally along the circumference with a girth, and the bisect...

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Problems solved by technology

In this way, the measurement error will be very large. At the same time, the hanging steel wire is very limited by the space. There are many supports inside the cylinder of a large mill. It is difficult to position the steel wire accurately, and the sight is not good. It is very difficult to operate. It can no longer meet the measurement requirements of the coaxiality of the hollow shaft of a large ball mill

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