Automatic adjusting device during steam turbine cylinder body sinking

Abstract

The invention provides an automatic adjusting device during steam turbine cylinder body sinking. The automatic adjusting device involves a cylinder body, a supporting table symmetrically extending from the periphery of the cylinder body and a supporting base supporting the supporting table, wherein a detection rod is fixed on the outer side of the cylinder body, a triggering device for detecting the position change of the detection rod is arranged at the detection rod, a hydraulic device for jacking the supporting table to a designated height is arranged on the supporting base, and the triggering device is connected with the hydraulic device to send a working signal of the hydraulic device. According to the automatic adjusting device, the automatic adjusting device can independently and automatically work according to the working state of a steam turbine and can automatically adjust the height of the cylinder body according to the sinking amount of the cylinder body, the sinking amount of the cylinder body can be accurately measured through displacement of the detection rod, the hydraulic device can be started in time, the hydraulic device can stably lift the cylinder body for a long time through the hydraulic oil and enable the cylinder body to be kept at the lifting height, normal operation of the steam turbine is guaranteed, when the steam turbine does not work, the adjusting device can automatically restore the cylinder body to the original installation state, and the structure of the steam turbine cannot be changed.

Description

technical field [0001] The invention relates to the field of power generation, in particular to an automatic adjustment device capable of automatically adjusting the sinking of a medium-pressure cylinder when a steam turbine is working. Background technique [0002] At present, most of the steam turbines in power plants adopt the structure of high and medium pressure cylinders divided into cylinders. The outer cylinders of the high and medium pressure cylinders are respectively equipped with front bearing seats, middle bearing seats and rear bearing seats. The shaft rod is provided with a corresponding steam seal at the position opposite to the blade top in the high and medium pressure inner cylinders. [0003] It is a common phenomenon in thermal power plants to shut down due to the heating of the cylinder block of the steam turbine. The installation structure of the steam turbine is that the lower cylinder (inner lower cylinder) of the high and medium pressure inner cylind...

AI Technical Summary

Problems solved by technology

As a result, the cylinder will deform and sink due to the temperature rise when it is working. Since the shaft and the cat's claws supporting the cylinder do not sink synchronously with the sinking of the cylinder, it will cause the blades on the shaft to sink. Friction and collision with the steam seal in the submerged cylinder, resulting in a trip

[0005] When solving this problem in the prior art, either by increasing the distance between the vanes and the surrounding air seals to allow for deformation, or by adding corresponding gaskets at the cat's claws to increase the height of the cylinder; the first The method will reduce the energy conversion efficiency. The second method is only a passive adjustment, and it is not easy to adjust the lifting range according to the sinking amount of the cylinder.

[0006] In addition, these two methods are only for the state when the steam turbine is working, and cannot be restored to the original state when the steam turbine is not working

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