Solving The Problem Of Shafting Alignment Of7000Tons Oil Tank By Using Displacement Method

With factories in recent years, the constant expansion of shipbuilding, ship buildingprocess of some of the technologies, processes and construction process of some of theproblems gradually emerging, especially in ship shafting installation process is moreprominent. As in previous years the shipbuilding tonnage is small, the shaft installationprocess is generally fitted into the shaft straight state. With the ship to the large,high-power-oriented development, shafting the working conditions become more severe,especially around the tail bearings and gearbox bearings, which greatly affected the life of theship. If you continue to follow the traditional approach of the shaft mounted in a straight linestatus, and its shortcomings will become apparent, it defined the traditional linear calibrationmethods are difficult to overcome in the installation location shafting brought thisunreasonable ills, thus prompting people have to strengthen research on shafting. Shipyardsnow widely used method of changing the height position bearing is pre-calculated for eachbear the load supported by the bearing a reasonable position of the shaft mounted in apredetermined curved state, reducing wear of the bearing, it is received relatively satisfactoryresults.This article is for their own factories as Saudi Arabia have built a number of producttankers of7,000tons shafting problem, use the displacement method, by changing themounting position of the pivot bearing shafting research carried out. This paper brieflydiscusses the process of shipbuilding, ship shafting the basic meaning, principles, and severalcommonly used methods of computation in the understanding of the characteristics ofdifferent calculation methods, the use of finite element method, the relevant elements ofshafting modeling process, the establishment of the corresponding simple physical model.Accordance with the specifications set forth in the support bearing load, shafting the stress indifferent locations and their corresponding corners and other standards, using the finiteelement method to calculate the different positions of the connecting flange displacementcoordinates. Offset value according to the characteristic parameter (sag) and turns the value(gap) of the specific measured value in the respective installation position control during areasonable height of the bearing and the corresponding slope, the shaft mounted computingrequirements specified shafting alignment the curve of state, so the load on the bearingreasonable distribution. Shafting installation is complete, and then the alignment results using hydraulic jacks jacking method for experimental verification, the experimental results showthat the actual load bearing is exposed in the theoretical calculated value within the allowablerange, has been the owner supervision and BV surveyor recognition. Meanwhile, the methodof shipbuilding factory has accumulated valuable experience, but also in the future to solvebigger ship construction process shafting problem has certain guiding significance.