A measuring device for the expansion of the abdominal cavity casing of an axial-flow centrifugal compressor

Abstract

The invention discloses a device for measuring the expansion amount of the abdominal cavity casing of an axial-flow centrifugal compressor, which relates to the technical field of turbomachinery structure design and is used for measuring the expansion amount of the abdominal cavity casing of an axial-flow centrifugal compressor during operation. The base of the axial-flow centrifugal compressor is fixedly connected, the piston barrel is equipped with a probe fixing barrel, and the distance measuring instrument installation frame is equipped with a distance measuring instrument; one end of the probe fixing barrel is connected with an elastic member and penetrates into the piston barrel, and the other end A probe is arranged; the dial is fixedly arranged on the probe fixing cylinder along the circumference of the probe fixing cylinder, and the distance measuring instrument obtains the expansion amount of the abdominal cavity casing by measuring the displacement of the dial. The invention is widely used in the measurement of the expansion of the abdominal cavity of the axial-flow centrifugal compressor, has a stable structure, high measurement accuracy and high reliability, and provides guarantee for the stable operation of the axial-flow centrifugal compressor unit.

Description

Technical field [0001] The invention relates to the technical field of turbine mechanical structure design, in particular to a device for measuring the expansion amount of the abdominal cavity casing of an axial-flow centrifugal compressor. Background technique [0002] As we all know, the wind direction of the axial-flow centrifugal compressor is parallel to the compressor shaft. During the high-speed operation of the axial-flow centrifugal compressor, the abdominal casing will expand within a certain range, and the change in the expansion of the abdominal casing will cause the compressor The gap between the rotor and stator changes. When the expansion of the abdominal casing changes to a certain level, it will cause the rotor and stator to scrape and damage the rotor and stator blades. In severe cases, the compressor may be scrapped. Therefore, the abdominal casing of the axial flow centrifugal compressor will expand. The measurement of volume plays a vital role in the stable ...

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Problems solved by technology

When the expansion of the abdominal cavity casing changes to a certain extent, it will cause the rotor and stator to scratch, causing the rotor and stator blades to break and damage. In severe cases, the compressor may be scrapped. Therefore, the expansion of the abdominal cavity casing of the axial flow centrifugal compressor The measurement of volume plays a vital role in the stable operation of compression, but the relevant measurement scheme is still blank in China, because it mainly has the following technical difficulties: an outer cage is installed outside the abdominal casing of axial flow centrifugal compressor The body of the axial flow centrifugal compressor cannot be directly measured at a short distance; the abdominal cavity casing of the axial flow centrifugal compressor is a suspended part, which is difficult to measure; the expansion of the abdominal cavity casing of the axial flow centrifugal compressor is generally about 0.05-0.70mm, and the measurement accuracy requires high ;The abdominal casing of the axial-flow centrifugal compressor is impacted by the air flow during work, which will produce severe vibration, and the measurement stability is required to be high

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