Partition plate deflection measuring system

Abstract

The invention provides a partition plate deflection measuring system which comprises a cantilever. The upper end of a supporting rod is connected with the cantilever. The cantilever is divided into a long section and a short section. A plurality of first metal plates which can slide along the cantilever and adapt to partition plates of different diameters are arranged on the long section of the cantilever. A measuring instrument which can be adjusted vertically and adapt to partition plates of different thicknesses is arranged on the first metal plate. A second metal plate which is used for loading a balance weight and counteracts measurement errors caused by the deflection of the cantilever is arranged on the short section of the cantilever. By means of the system, the defects of the prior art are overcome; the deflection of the partition plates is measured through the partition plate deflection measuring system instead of an original dial indicator, the measurement errors caused by the deformation of a table body are counteracted, and the partition plate deflection measurement accuracy is greatly improved.

Description

technical field [0001] The invention relates to a diaphragm deflection measurement system, which belongs to the technical field of power station steam turbines. Background technique [0002] During operation, the diaphragm of the steam turbine bears a pressure difference of one stage of the passing steam. The steam flow rate of the high-power steam turbine is large, the size of the diaphragm is large, and the force load on the diaphragm is also large. The larger pressure difference will cause the diaphragm to produce shaft When the deflection of the diaphragm is too large, it will cause dynamic and static friction between the rotor or the blade and the diaphragm. If the welding quality of the stator blade of the diaphragm is poor, it will also cause cracking of the weld seam, and even cause the inner ring of the diaphragm to fall Accidents will affect the safe operation of the steam turbine, so it is necessary to ensure that the diaphragm of the steam turbine has sufficient ...

AI Technical Summary

Problems solved by technology

With the increase of steam turbine power, the size of the last-stage diaphragm of the low-pressure cylinder of the steam turbine continues to increase. The maximum diameter of the low-pressure diaphragm of the CAP1400 steam turbine has reached 6.8 meters. In order to facilitate the deflection test on site, the diaphragm deflection test bench is made detachable, and the diaphragm bench body is made up of several pieces of table tops, so it is difficult to ensure the accuracy of the measurement plane of the diaphragm deflection test bench. Rigidity and flatness

[0005] To sum up, with the traditional measurement system, the measurement accuracy of the diaphragm deflection cannot be guaranteed. Therefore, a new diaphragm deflection measurement system is urgently needed to improve the measurement accuracy of the diaphragm deflection

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