A steam turbine wet steam measurement image probe

Abstract

A steam turbine wet steam measurement image probe is characterized in that the probe includes: a probe rod, a CCD or CMOS camera, a telecentric lens, an illumination source, a glass window and a computer, and the front end of the CCD or CMOS camera and the telecentric The lenses are connected together and installed in the probe rod. There is a glass window in front of the telecentric lens to prevent water droplets from washing into the telecentric lens. The output end of the CCD or CMOS camera is connected to the computer through the signal cable, and the data is processed and saved by the computer. When taking water droplet images, the strong light emitted by the illumination source hits the measured water droplet, and the image of the measured water droplet passes through the glass window and is received by the telecentric lens before being captured by a CCD or CMOS camera. The beneficial effect of the invention is that the characteristics of the telecentric lens and the CCD or CMOS digital camera are used to realize the measurement of the parameters of the wet steam two-phase flow in the steam turbine, the secondary water droplets and the water film of the blade, and meet the needs of the wet steam research and the prevention of water erosion in the steam turbine.

Description

technical field [0001] The invention relates to a steam turbine internal wet steam measurement device which combines image method and laser technology, in particular to a steam turbine wet steam measurement image probe, which is used to measure parameters such as secondary water droplets and blade surface water film and rupture of steam turbine internal wet steam . Background technique [0002] The steam turbine is the most important prime mover, which is mainly used to drive generators to generate electricity and drive various large machinery. The working principle of the steam turbine is that high-temperature and high-pressure superheated steam enters the steam turbine, gradually expands in the steam turbine to do work, drives the steam turbine to rotate and drives the generator to generate electricity. While the steam is expanding and doing work, the temperature and pressure gradually drop, and condensation occurs to produce a large number of extremely small water drople...

AI Technical Summary

Problems solved by technology

The diameter of the secondary water droplets ranges from about 10 microns to hundreds of microns, and the flow velocity is relatively high. When they hit the surface of the high-speed rotating steam turbine blade, the blade will be damaged, causing water erosion, and affecting the safe operation and economy of the steam turbine.

But in the image taken by ordinary lens, the image of the object close to the lens is larger, and the image of the lens far away from the lens is smaller, so it is difficult to determine the size of the object in the image during image recognition

Therefore, there is currently no image measurement device used in the measurement of various parameters such as water droplets and water films in the wet steam two-phase flow in the steam turbine.

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