Determination method for cutting line of bracket margin for full-turn rudder propeller reinforcement

Abstract

The invention relates to the technical field of ship rudder propeller devices, and discloses a method for determining the cutting line of a full-rotation rudder propeller reinforcement bracket allowance. A space coordinate system is established on the full-rotation rudder propeller, and the bottom sealing plate and the full-turn rudder propeller are taken. Three of the intersection points of the reinforcement bracket are reference points B (x2, y2, Z2), C (x3, y3, Z3), D (x4, y4, Z4), and the intersection points of the bottom sealing plate and the reinforcement bracket are determined according to the formula Hn(En, Fn, Zn), the coordinates of the three reference points and the x and y coordinates of the intersection point can be directly measured with a tape measure on site or converted in the coordinate system according to the equipment data. The same reinforced bracket will The coordinates of the first and last two points can be connected to obtain the cutting line of the bracket allowance of the full-turn rudder propeller. The measuring tool is simple and does not need a total station, and can be controlled by the personnel of the department at any time without being limited by the external door. At the same time, Adopting this method can effectively save manpower cost and time cost, and reduce review workload.

Description

technical field [0001] The invention relates to the technical field of ship rudder propeller devices, in particular to a method for determining a cutting line for a full-turn rudder propeller reinforcement bracket margin. Background technique [0002] At present, under the complex line shape, the determination of the cutting line of the bracket margin of the full-turn rudder propeller is mainly through the establishment of a virtual plane by the airborne software of the total station. There is a dead angle in this method of measurement, which has a large limit on the measurement position, and it needs continuous transfer stations to draw points on a plane and connect them into a line, resulting in a large cumulative error. At the same time, this method also has the following obvious deficiencies and defects: [0003] 1. A total station is required, and the measuring tools are bulky and complicated. [0004] 2. The main body of measurement is an external department, affecte...

AI Technical Summary

Problems solved by technology

[0003] 1. A total station is required, and the measuring tools are bulky and complicated

[0004] 2. The main body of measurement is the external department, affected by the personnel and work plan of the external department, the time node and the accuracy of the results are disturbed, and mutual buck-passing is easy to occur

[0005] 3. The re-inspection workload is heavy, and it is necessary to repeat the measurement work of the full-turn rudder propeller to strengthen the bracket margin cutting line

[0006] 4. The measurement time is long, the time cost, labor cost and instrument cost are high

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