Measuring device and method of relative elevation of bearing pedestals of steam turbine generator unit

Abstract

The invention provides a measuring device and method of relative elevation of bearing pedestals of a steam turbine generator unit. The device comprises an installation fork arm, a supporting piece, ameasuring arm and a inclination angle sensor; the installation fork arm is fixedly installed on a first bearing pedestal of the steam turbine generator unit; the supporting piece is fixedly mounted ona second bearing seat of the steam turbine generator unit, one end of the measuring arm is rotatably connected to the mounting fork arm; the other end of the measuring arm is freely supported by thetop of the supporting piece, and the measuring arm and a rotor rotating shaft of the steam turbine generator unit are located in a same vertical plane when the measuring arm rotates to any angle; andthe inclination angle sensor is installed on the measuring arm and is used for detecting the inclination angle of the measuring arm. The device is simple and convenient in measurement, is high in sensitivity, accuracy and safety, and is suitable for continuously monitoring the change condition of the relative elevation of the bearing pedestals for a long time.

Description

technical field [0001] The invention relates to the technical field of engineering measurement, in particular to a device for measuring the relative elevation of a bearing seat of a turbogenerator set and a method for measuring the relative elevation of a bearing seat of a turbogenerator set. Background technique [0002] Large steam turbine generator set is the core equipment of a thermal power plant, and it is a general term for the two major equipments of steam turbine and generator. Among them, the steam turbine is the prime mover, which is mainly composed of a cylinder and a rotor. The high-temperature and high-pressure steam generated by the boiler flows in the cylinder, passes through the stationary vane flow channel installed on the cylinder, and converts the heat energy and pressure energy of the steam into kinetic energy, which is then impacted at high speed. The moving blades installed on the rotor drive the rotor to rotate at high speed. The rotor of the generat...

AI Technical Summary

Problems solved by technology

[0009] (1) Considering the insulation performance in the existing measurement technology, the measurement medium usually adopts oily liquid such as transformer oil, which has high viscosity, so there will be more air bubbles in the liquid, which will be injected into the measuring cup and the connecting pipe. Slow release, in order to avoid accumulation at the metal buoy of the measuring cup during official measurement, impact the metal buoy, and affect the measurement result

After injecting the working liquid, it takes a long time (about 3 days) to stand still to exhaust, which increases the workload of personnel;

[0010] (2) In the existing measurement technology, liquid is used as the transmission medium for relative elevation changes. Due to the viscosity of the liquid and the influence of the length of the pipeline, when the relative elevation of the measurement plane changes, the force balance is reached in the two measuring cups, that is, the liquid level remains flush. The response is slow and cannot reflect the rapid changes in the relative elevation of the measurement plane;

[0011] (3) The existing measurement technology uses liquid as the medium, and the measuring cup is in the state of communicating with the atmosphere. Not only does the oil volatilize, but also the pipeline joint is easy to loosen in the field environment, resulting in leakage; on the one hand, it is necessary to replenish the measuring liquid, increasing The workload of personnel, on the other hand, leads to on-site oil pollution, and there is even a fire hazard when the oil leaks into the high-temperature area;

[0012] (4) The on-site installation of the measurement system requires a certain length of liquid pipeline, which is easy to be accidentally touched by the staff on site, increasing the risk of damage and leakage, so it cannot be used as a means of long-term monitoring

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