Non-contact measuring method for leaf apex radial clearance of engine rotor

Abstract

The invention relates to a non-contact measuring method for a leaf apex radial clearance of an engine rotor, and the method comprises the following steps: 1) assembling a measuring system, calibrating a sensor and determining the relation between the radial clearance and voltage of a leaf apex; 2) preparing before measuring; and 3) measuring the leaf apex radial clearance of the engine rotor. In the measuring method provided by the invention, a measurement technique based on a capacitance method is adopted; the measuring course and the assembling are synchronously carried out; the once cartridge disassembly and assembly is reduced; the measuring time is shortened; the production efficiency is improved; and the measuring accuracy is improved, thereby improving the assembly quality of an engine and reducing the failure rate of the engine. The non-contact measuring method provided by the invention is mainly used for measuring the leaf apex radial clearance of the rotors of parts such as an engine, a high-pressure compressor, a low-pressure compressor, a high-pressure turbine, a low-pressure turbine and the like.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a non-contact measuring method for radial gaps of engine rotor blade tips. Background technique [0002] When measuring the radial clearance of the engine rotor blade tip, the usual method is to assemble the upper half casing and the lower half casing together, and ensure that the two are concentric, and then remove the upper half casing, using a feeler gauge or pressure wax The radial clearance of the engine rotor blade tip is measured locally (where the lower half of the casing and the upper half of the casing are aligned). This measurement method has low precision (only 0.02mm), low efficiency (it takes 2 hours to complete a measurement), and poor accuracy (poor repeatability can only reach 0.02mm). Because the space between the internal rotor and the casing of the engine is narrow, and the gap space is in the shape of a circular cavity, the measurem...

AI Technical Summary

Problems solved by technology

This measurement method has low precision (only 0.02mm), low efficiency (it takes 2 hours to complete a measurement), and poor accuracy (poor repeatability can only reach 0.02mm)

Because the space between the internal rotor and the casing of the engine is narrow, and the gap space is in the shape of a circular cavity, the measurement range cannot reach the entire circumference by using a feeler gauge or wax pressing method, so only the partial radial clearance of the engine rotor blade tip can be measured , thus affecting the assembly accuracy and performance of the engine

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