A tool for measuring the radial distance of an aero-engine diffuser

Abstract

The application belongs to the field of aero-engine measuring tooling, in particular to a radial distance measuring tooling for an aero-engine diffuser. Including ruler base, main scale, sliding probe base, digital display unit, front probe, rear probe and support components. There is a front measuring head installation groove and a supporting installation hole on the ruler base; the lower end of the main ruler is fixed on the ruler base and is located at one end of the front probe installation groove; a sliding groove is provided on the sliding probe base, and the sliding probe base passes The chute is sleeved on the main ruler, and the sliding probe seat is provided with a front probe installation part and a rear probe installation part; the digital display unit is installed on the groove wall of the sliding probe seat chute, and is located on the front side of the main ruler , the front side of the digital display unit is provided with a display screen, and the rear side is provided with a moving grid that matches the fixed grid of the main scale groove; the front probe is installed on the front probe mounting part of the sliding probe base, and The front probe installation groove of the base is suitable; the rear probe is installed on the rear side of the sliding probe base; the support assembly is installed in the support installation hole of the ruler base.

Description

technical field [0001] The application belongs to the field of aero-engine measurement tooling, and in particular relates to a radial distance measurement tool for aero-engine diffusers. Background technique [0002] Both the heat shield and the stabilizer in the aero-engine diffuser are annular cylindrical structures, and there are both axial and radial distances between the outer edge of the stabilizer and the wave crest of the heat shield, such as figure 1 shown. Dimension A is the radial dimension to be measured. There is an axial distance between each wave crest and the stabilizer (dimension B and dimension C). The heat shield has holes E evenly distributed in the circumferential direction. The distance D between the receivers. The engine stabilizer and heat shield are prone to deformation after the test run. In order to meet the needs of scientific research and troubleshooting, measurement tooling is designed and manufactured. [0003] In the prior art, commonly use...

AI Technical Summary

Problems solved by technology

Among them, the conventional spatial structure can be measured by a three-coordinate measuring machine, but its size must ensure that the engine is in an assembled state for measurement. The engine is too large to be placed on the three-coordinate measuring machine platform; the axial dimension of the heat shield is long, The part to be measured is at the front end, and the probe of the three-coordinate measuring machine needs to be extended from the rear side, and the length of the probe is insufficient; factors such as turnover parts, constant temperature, and queuing for testing increase the measurement cycle and cost

The articulated arm measuring machine has the following disadvantages. The surface to be measured is a circular curved surface and sharp edges. The articulated arm measuring machine relies on the operator to manually touch the elements to build elements. It cannot accurately find the part to be measured and cannot achieve measurement.

Among conventional measuring tools, ordinary vernier calipers and inner diameter micrometers cannot measure the radial dimension of the space; the base of the height vernier caliper is a plane, which cannot be fixed on the annular heat shield, and its weight is heavy, making it difficult to operate when measuring the upper half of the circumference

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