Measurement and calculation method of turbine shaft system center

Abstract

The invention discloses a measurement and calculation method of a turbine shaft system center. The measurement and calculation method comprises the following steps: firstly, carrying out modeling on a turbine shaft system before repair, and measuring the center number value of the turbine shaft system before repair, the length of each rotor and the diameter of the rear clutch of each rotor to obtain the modeling data of the turbine shaft system before repair; then, according to the modeling data of the turbine shaft system before repair, calculating the adjustment amount of each rotor clutch; and taking the adjustment amount of each rotor clutch as an intermediate value to calculate to obtain the adjustment amount of a corresponding rotor bearing so as to calculate the adjustment amount of a corresponding bearing regulation spacer according to the adjustment amount of each bearing and the position of each adjustment spacer. Firstly, the center number value of the turbine shaft system before repair is measured, the adjustment amount of each rotor clutch is calculated, the adjustment amount of each rotor clutch is taken as the intermediate value to calculate the adjustment amount of the corresponding bearing, an influence value on a rear clutch opening value after the rotor bearing is regulated does not need to be measured and calculated, measurement and calculation can be well organized, and a measurement and calculation amount and measurement fault possibility are effectively reduced.

Description

technical field [0001] The invention relates to a method for measuring and calculating the shafting center of a steam turbine. Background technique [0002] During the operation of the steam turbine, the center of the steam turbine will change due to the wear of the supporting bearing, the displacement of the cylinder and the bearing seat, and the corrosion of the bearing pad iron. If the center changes too much, the vibration will exceed the standard, the moving and static parts will rub against each other, and the bearing will heat up. Therefore, during the overhaul of the turbogenerator set, it is necessary to check and adjust the center of each back wheel of the shafting. Multi-rotor steam turbine shaft center measurement is a very complicated task. The influence of rotor bearing adjustment on the opening and circumference of the center of the backrest wheel must be considered during calculation. The calculation is large and the value is very easy to make mistakes. A w...

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Problems solved by technology

[0008] For the shafting center of a multi-rotor steam turbine, the calculation method is similar to that of the two-rotor coupling center, but the influence of one rotor adjustment on the circumference and opening of the next back wheel needs to be fully considered in the calculation, and the calculation workload is relatively large, such as figure 2 , after calculating the adjustments of #3 and #4 bearings, the values ​​of the opening and circumference of rotors 2 and 3 will change. These values ​​will not be re-measured separately in the actual field. Generally, the adjustment of #3 and #4 bearings to 2 will be recalculated. , No. 3 rotor opening, and the influence value of the circumference value, combined with the original measurement value, the calculated algebraic sum is the actual value of the rotor 2 and 3 circumference values ​​after the adjustment of rotor 2 (regardless of the adjustment deviation)

In this process, two values ​​need to be measured, the adjusted value of the rotor bearing and the influence value of the adjusted rotor on the opening value of the backrest wheel, especially the calculation of the influence value of the adjusted rotor on the opening value of the backrest wheel. The calculation is cumbersome and the numerical direction It is easy to make mistakes, which reduces the speed of calculating the center of steam turbine shafting and reduces the efficiency of calculating the center of steam turbine shafting

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