Method for measuring linearity of rudder pintle and rudder lever of large-size vessel

Abstract

The invention relates to a method for measuring the linearity of a rudder pintle and a rudder lever of a large-size vessel. The method comprises the following steps of: plugging the rudder pintle and the rudder lever in upper and lower rudder holes of a rudder blade respectively; 2, fixing three measuring Half rings on the outer circles of bearing retainers respectively; 3, putting a V-shaped iron measurement light target on the near end and the outer circle of the same bearing retainer, adjusting a measuring frame to make the center of reticule of a micrometer autocollimator aimed at the central point of a measurement cross closed angle light target of the V-shaped iron; 4, changing for another V-shaped iron measurement light target, making the heights of the central points of the measurement cross closed angle light targets of the two blocks of V-shaped iron equalized and the left-right positions of the central points of the measurement cross closed angle light targets of the two blocks of V-shaped iron consistent by adjustment; and 5, placing the adjusted V-shaped iron on the A and C bearing retainer outer circles, establishing a reference straight line by using the cross closed angle light targets on the A and C bearing retainer outer circles as references, moving the measurement light target of the V-shaped iron on the A bearing retainer to the B bearing retainer, and measuring a deviation of the center of the point from the reference line, and using the distance as a difference value for the deviation of the target from the reference line. The method of the invention can improve accuracy and efficiency of the rudder system measurement.

Description

technical field [0001] The invention relates to a rudder system for controlling the forward direction of a large ship, the length of which varies from 10 meters to 20 meters and above. Background technique [0002] In today's shipbuilding industry, with the continuous improvement of production technology, the tonnage of ships built also varies from small to large. The size of the rudder system that controls the direction of the ship is also increasing. For example, the "75000" T bulk carrier, "110000" T product oil tanker, "8530" container ship, "LNG" natural liquefied gas ship and other ships produced and processed by our company. The length of the rudder system varies from 10 meters to 20 meters and above. Then how to measure the straightness of the center of the rudder system is a big problem we encountered in the measurement. [0003] The rudder system consists of three parts: rudder blade, rudder pin and rudder stock. There are two upper and lower taper holes on the...

AI Technical Summary

Problems solved by technology

But this method can only measure the error in the up and down direction, but not the error in the left and right direction

At the same time, the measurement accuracy of the above two measurement methods is relatively low.

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