Steam turbine main shaft vibration monitoring system

Abstract

The invention relates to the technical field of steam turbine safety operation monitoring, and provides a steam turbine main shaft vibration monitoring system. The system comprises a first sensor usedfor detecting an axial movement of a main shaft of a steam turbine, a second sensor used for detecting a radial movement of the main shaft of the steam turbine, and a steam turbine remote monitoringdevice, wherein the first sensor and the second sensor are arranged on one side of the main shaft in a bearing box of the steam turbine; a bent threading pipe is mounted on a side wall of the bearingbox; and signal lines of the first sensor and the second sensor are led out of the threading pipe and are connected with the steam turbine remote monitoring device. By designing the bent threading pipe, the signal lines of the first sensor and the second sensor are effectively isolated for protection; the phenomenon that the bearing box leaks oil because the lubricating oil jet in the bearing boxflows out along outgoing lines of the sensors is avoided; and remote monitoring of the axial and radial movements of the main shaft of the steam turbine is ensured.

Description

technical field [0001] The invention relates to the technical field of monitoring the safe operation of steam turbines, in particular to a vibration monitoring system for a main shaft of a steam turbine. Background technique [0002] The operating condition of the main shaft of the steam turbine is a key indicator of the safe and stable operation of the steam turbine. At present, multiple sensors are usually used in the bearing box of the steam turbine to detect parameters such as the speed, eccentricity, shaft vibration, and differential expansion of the main shaft of the steam turbine. After the signal lines of these sensors are drawn out of the bearing box of the steam turbine, they pass The monitoring system is connected, and the remote monitoring system reads and stores relevant detection data in real time, and displays them online in real time, so that the staff can intuitively observe the safe operation status of the steam turbine. [0003] A bearing seat is arranged...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the signal lines of various sensors used to detect the operating conditions of the main shaft in the bearing housing of the current steam turbine lack protection, so that it is difficult to implement reliable monitoring of the operating state of the steam turbine. Therefore, a vibration of the main shaft of the steam turbine is provided. Monitoring System

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