Method for calculating theoretical value of deflection of small turbine rotor
A steam turbine rotor and calculation method technology, applied in the direction of calculation, electrical digital data processing, special data processing applications, etc., can solve the problems of low accuracy of calculation methods, improve rationality, assembly accuracy and efficiency, optimize calculation process, The effect of improving computational efficiency
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specific Embodiment approach 1
[0032] Specific implementation mode one: as figure 1 As shown, a method for calculating the theoretical value of the rotor deflection of a small steam turbine includes the following steps:
[0033] Step 1: Carry out three-dimensional modeling of the steam turbine rotor to obtain a three-dimensional rotor model;
[0034] Step 2: Simplify the three-dimensional rotor model to obtain the simplified rotor;
[0035] Step 3: mark the corresponding shaft segment number and point number on the simplified rotor;
[0036] The simplified rotor is marked with the corresponding shaft segment number and point number, and the influence of the tiny shape such as the adjustment level on the calculation is removed, and the calculation process is simplified.
[0037] Step 4: Determine the load according to the mass analysis of the three-dimensional rotor model;
[0038] Step 5: Equivalent any shaft segment to a beam unit, and perform force analysis on the beam unit according to the load determ...
specific Embodiment approach 2
[0043] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the steam turbine rotor is carried out three-dimensional modeling in the said step one, and the specific process of obtaining the three-dimensional rotor model is:
[0044] Modeling in CATIA software, according to the general design drawing of the rotor, establish a sketch datum, draw a sketch, and establish a three-dimensional model of the rotor shaft section by means of rotation; The establishment needs to use the add-in macro option of Excel for the coordinates of each profile value point, and import it into the generative shape design module of CATIA in the form of a spline curve. A spline curve and two co-tangent circles of these two spline curves, the imported model line is as follows figure 2 shown. The trimmed profile of the common tangential circle is the closed profile of the blade, and the trimmed profile is as follows: image 3 shown.
[0045] After importing ...
specific Embodiment approach 3
[0047] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the simplification of the three-dimensional rotor model in Step 2 is as follows: the rotor is equivalent to a whole connected by a finite number of beam units, and the The entire section of the rotor is equivalent to the load object, and the rest of the blades are equivalent to the rotor load.
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