Virtual inspection and repair method of steam turbine components based on reverse engineering
A technology of reverse engineering and detection methods, applied in the field of virtual assembly, inspection and repair, can solve the problems of cumbersome repair and assembly in different places, and achieve the effect of solving the assembly in different places and speeding up the efficiency of repair and repair.
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specific Embodiment approach 1
[0032] Specific implementation mode one: combine Figure 1 to Figure 5 Illustrate this embodiment, the virtual detection method of the steam turbine part cover based on reverse engineering described in this embodiment, comprises the following steps:
[0033] Step 1. Establish the three-dimensional digital model of each part of the steam turbine in the three-dimensional modeling software CATIA; the specific method is to set up the three-dimensional design model of each part of the steam turbine in the component design module in the three-dimensional modeling software CATIA, such as the front, rear, upper and lower cylinders, Front and rear bearing housings, front and rear steam seals, rotors and multi-stage baffles, etc.;
[0034] Step 2, extracting the point cloud data of each physical part of the steam turbine through 3D scanning; the specific method is to use a portable 3D scanner to scan a single physical part of the steam turbine to obtain the point cloud data of each phys...
specific Embodiment approach 2
[0062] Specific embodiment two: This embodiment is a further limitation of the virtual detection method based on the reverse engineering of the steam turbine cover described in the first embodiment. In this embodiment, the specific method for extracting the rotor deflection in step five is:
[0063] Step 51. Establish a measurement benchmark:
[0064] Create a datum plane, and then create a parallel plane of the bearing position (obtained by offsetting the datum plane); make a curve formed by the two circles before and after the bearing rotor; optimize the two curves; convert the curve into a point (using the continuous curve on the section curve) Points, discard bad points); fit each curve converted point into a circle; make a line connecting the centers of the two circles before and after the bearing rotor; connect the line with the Y axis of the coordinate system where the point cloud model is located Alignment, the connection is the measurement benchmark;
[0065] Step 52...
specific Embodiment approach 3
[0067] Specific embodiment three: This embodiment is a further limitation of the virtual detection method based on the reverse engineering of the steam turbine cover described in the second embodiment. In this embodiment, the specific method for extracting the assembly size in step five is:
[0068] In the Geomagic Qualify software, the plane fitting is performed on the scanning data points on the two parts that need to be measured, and the plane distance between the two parts that need to be measured is measured, so as to obtain the assembly size between the two parts.
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