Method for lighting ultra-long shafting on marine vehicle to center

Abstract

The invention relates to a method for alignment of super-long marine shafting. A plurality of optical alignment targets are arranged on the whole shafting. Both ends of the optical alignment targets are provided with stern reference targets and bow reference targets. The method mainly utilizes two times of alignment technology to carry out the alignment to the super-long shafting. During the first time of alignment, a large magnification micro-autocollimator is utilized to fix two centers of the optical alignment targets in the middle part with reference to the stern reference targets and the bow reference targets. During the second time of alignment, a micrometer autocollimator is utilized to carry out the alignment to the rest optical alignment targets with the reference to the stern reference targets, the bow reference targets, and the two centers of the optical alignment targets which are fixed during the first time of alignment. By using the method of the invention to carry out alignment to the super-long shafting, the alignment accuracy of the super-long shafting is greatly improved. The left and right symmetry degree of the main engine foundation of the super-long marine shafting, the measuring accuracy of the spacer thickness on a bearing pedestal, the positioning accuracy of a gear box and an intermediate bearing pedestal can be guaranteed.

Description

technical field [0001] The invention relates to shipbuilding, in particular to a method for light centering shafting during the construction of large ships. The shafting of large ships is generally long, exceeding 90 meters, and a new alignment process must be adopted to meet the alignment accuracy requirements of ship construction. Background technique [0002] In the shipbuilding industry, the method of using drawing wire to collimate the host and its main components has been used for many years. However, using this method is inefficient and requires considerable experience. In the case of long-distance straight line alignment, there are complicated situations such as steel wire sagging, so the alignment effect is often poor, and the accuracy is difficult to guarantee. [0003] With the development of science and technology, people use the principle of linear propagation of light to produce micro-collimation telescopes, which fundamentally solve the complicated situation...

AI Technical Summary

Problems solved by technology

When the distance increases to a certain extent, the target image will become smaller, so that the observer cannot accurately aim at the target image

Therefore, if the above method is used to center (that is, center) the shafting with a length greater than 90 meters, there will be a large accuracy error, and it is difficult to meet the accuracy requirements of shipbuilding

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