Radial distance measuring tool for aero-engine diffuser

Abstract

The invention belongs to the field of aero-engine measuring tools, and particularly relates to an aero-engine diffuser radial distance measuring tool. The device comprises a ruler base, a main ruler,a sliding measuring head base, a digital display unit, a front measuring head, a rear measuring head and a supporting assembly. The ruler seat is provided with a front measuring head installation groove and a support installation hole. The lower end of the main ruler is fixed on the ruler seat and is positioned at one end of the front measuring head mounting groove; a sliding groove is formed in the sliding measuring head base, the sliding measuring head base is arranged on the main ruler in a sleeving mode through the sliding groove, and the sliding measuring head base is provided with a front measuring head installation part and a rear measuring head installation part; the digital display unit is installed on the wall of the sliding groove of the sliding measuring head base and located on the front side of the main ruler, a display screen is arranged on the front side of the digital display unit, and a movable grid matched with the fixed grid of the main ruler groove is arranged on the rear side of the digital display unit; the front measuring head is mounted on the front measuring head mounting part of the sliding measuring head seat and is matched with the front measuring headmounting groove of the ruler seat; the rear measuring head is mounted on the rear side of the sliding measuring head seat; the supporting assembly is installed in the supporting installation hole of the ruler base.

Description

technical field [0001] The application belongs to the field of aero-engine measuring tooling, in particular to a radial distance measuring tooling for an aero-engine diffuser. Background technique [0002] Both the heat shield and the stabilizer in the diffuser of an aero-engine have an annular cylindrical structure, and there are both axial and radial distances between the outer edge of the stabilizer and the crest of the heat shield, as shown in figure 1 shown. Dimension A is the radial dimension to be measured. There is an axial distance between each peak and the stabilizer (dimension B, dimension C). The distance D between the receivers. The engine stabilizer and heat shield are easily deformed after the test run. In order to meet the needs of scientific research and troubleshooting, the measurement tooling is designed and manufactured. [0003] In the prior art, generally used measuring tools include three-coordinate measuring machines, articulated arm measuring mach...

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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