Method for determining allowance cutting line of rudder propeller reinforcing bracket

Abstract

The invention relates to the technical field of ship rudder propeller device and discloses a method for determining an allowance cutting line of a rudder propeller reinforcing bracket. A space coordinates system is established on a rudder propeller; three intersecting points of a bottom sealing plate and the rudder propeller reinforcing bracket are taken as reference points B (x2, y2, z2), C (x3, y3, z3) and D (x4, y4, z4); according to a formula, the intersecting point Hn (En, Fn, Zn) of the bottom sealing plate and the rudder propeller reinforcing bracket is determined, wherein coordinate values of the three reference points and x and y coordinate values of the intersecting point can be directly measured by using a measuring tape on site or can be measured and converted in the coordinates system according to equipment information; the allowance cutting line of the rudder propeller reinforcing bracket can be obtained by connecting coordinates of front and tail points of the same reinforcing bracket; and therefore, a measuring tool is simple, a total-station instruction does not need to be used, and moreover, the measuring can be operated by department staff at any time, the measuring does not need to be limited to external departments; and meanwhile, by using the method for determining the allowance cutting line of the rudder propeller reinforcing bracket, the labor cost and time cost can be effectively saved, and the review workload can be reduced.

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

Images