CN-122016112-A - Telemetry module mounting hole structure for measuring dynamic stress of rotor blade in complete machine environment

CN122016112ACN 122016112 ACN122016112 ACN 122016112ACN-122016112-A

Abstract

The invention relates to the technical field of aeroengines, and discloses a telemetry module mounting hole structure for measuring dynamic stress of a rotor blade in a complete machine environment, which comprises a rectangular mounting hole, a first boss, a second boss, a third boss and a baffle plate, wherein the first boss is arranged on the inner wall of the outer edge of the rectangular mounting hole, and the second boss is arranged on the inner wall of the inner edge of the rectangular mounting hole, so that a telemetry module is installed between the first boss and the second boss in an interference manner, the rectangular mounting hole is allowed to have small deformation in the radial direction, and the telemetry module which is in interference fit is convenient to smoothly install; the invention can effectively solve the problems of unstable installation of the telemetry module with the existing structure and insufficient fatigue life caused by stress concentration at the hole edge of the installation hole, and improves the reliability and safety of the dynamic stress measurement test of the rotor blade of the whole engine.

Inventors

LIU QIANG
ZHANG GUOQIAN
LI LE
Fan Xingchao
SHEN LIAN
GU YUANXING
HUANG XIANGLONG

Assignees

中国航发四川燃气涡轮研究院

Dates

Publication Date: 20260512
Application Date: 20260109

Claims (8)

1. The utility model provides a complete machine environment rotor blade is telemetry module mounting hole structure for dynamic stress measurement which characterized in that includes: The rectangular mounting holes are arranged on the rotor shaft journals and used for mounting the telemetry modules, and chamfer angles are respectively arranged on four corners of each rectangular mounting hole; The first boss is arranged on the inner wall of the outer edge of the rectangular mounting hole; The second bosses are arranged on the inner wall of the inner edge of the rectangular mounting hole, the number of the second bosses is at least two, and the telemetering module is installed between the first bosses and the second bosses in an interference mode; the third bosses are arranged on the two circumferential inner walls of the rectangular mounting hole and are used for being abutted with the circumferential outer wall of the telemetry module; And the baffle plates are respectively arranged on the first boss and the second boss and are used for axially limiting the telemetry model.
2. The telemetry module mounting hole structure of claim 1, wherein the first boss is circumferentially offset from the second boss.
3. The telemetry module mounting hole structure of claim 1 wherein the amount of interference of the telemetry module upon interference mounting between the first boss and the second boss is in accordance with , wherein, For interference of the telemetry module when installed in interference between the first boss and the second boss, For the design extrusion force of the telemetry module for interference fit between the first boss and the second boss, , For the coefficient of friction of the telemetry module with the first boss interface, For the lower limit value of the friction force of the contact surface of the telemetry module and the first boss, For the allowable maximum compressive stress of the telemetry module, For the contact area of the telemetry module with the first boss, For the purpose of telemetry of the quality of the module, For telemetry of the radial height of the module centroid point, For maximum operating speed of the engine in which the telemetry module is installed, For the radial cross-sectional area of the telemetry module, For the telemetry module to have a modulus of elasticity in the radial direction, An initial length in a radial direction for the telemetry module; as the modulus of elasticity of the journal material, An initial length of the first boss along the radial direction; Is the radial cross-sectional area of the second boss, Is the initial length of the second boss in the radial direction.
4. The telemetry module mounting hole structure of claim 1, wherein the circumferential width of the first boss is less than the circumferential width of the groove between the two second bosses.
5. The telemetry module mounting hole structure of claim 1 further comprising a fourth boss disposed on an inner peripheral wall of the rectangular mounting hole, the number of the fourth bosses being two, the two fourth bosses being disposed on both sides of the first boss.
6. The telemetry module mounting aperture arrangement of claim 5, wherein the fourth boss has a circumferential width that is less than half the circumferential width of the first boss.
7. The telemetry module mounting hole structure of claim 1, wherein the number of third bosses on each side is two, each third boss having a width less than half a width of a groove between two third bosses on the same side.
8. The telemetry module mounting hole structure of claim 1, wherein the four rounds of the rectangular mounting hole are radially machined with a first radius, wherein the first radius is 1/4-1/3 of the distance between the first boss and the second boss.

Description

Telemetry module mounting hole structure for measuring dynamic stress of rotor blade in complete machine environment Technical Field The invention relates to the technical field of aeroengines, and discloses a telemetry module mounting hole structure for measuring dynamic stress of a rotor blade in a complete machine environment. Background The dynamic stress measurement test data of the rotor blade of the high-pressure compressor of the dual-rotor aeroengine under the complete machine environment is generally transmitted wirelessly by means of a telemetry module, and the telemetry module for the type of test is installed in the prior art by refitting the front shaft neck of the compressor, and a plurality of axial installation holes are machined at the radial plate positions according to requirements so as to clamp the telemetry module into the installation holes. Considering the working environment of the engine with high temperature and high rotating speed, the structural design of the mounting hole needs to consider the stability and convenience of the installation of the telemetry module on one hand and the problem of stress concentration at the hole edge on the other hand. The structure of the mounting hole of the telemetry module in the current engineering is shown in fig. 1, which is a simple rectangular hole 1, round holes are processed at two sharp corners at the upper side to reduce stress concentration, and a plurality of baffles are added at the rear end face of the hole for axial positioning. The main problems existing in the structure are as follows: (1) Because the telemetry module is a finished product, the fit clearance between the telemetry module and the mounting hole is required to be larger for the convenience of mounting and dismounting, so that the telemetry module is easy to vibrate along the radial direction or the circumferential direction in the test process; (2) The stress concentration of the hole edge of the current mounting hole structure is obvious, and the problem that the fatigue life cannot meet the dynamic stress measurement test requirement exists. Disclosure of Invention The invention aims to provide a telemetry module mounting hole structure for measuring the dynamic stress of a rotor blade in a complete machine environment, which can effectively solve the problems of unstable mounting of telemetry modules in the existing structure and insufficient fatigue life caused by stress concentration at the hole edge of a mounting hole, and improves the reliability and safety of a dynamic stress measuring test of the rotor blade of the complete machine of an engine. In order to achieve the technical effects, the technical scheme adopted by the invention is as follows: a telemetry module mounting hole structure for measuring dynamic stress of a rotor blade in a complete machine environment, comprising: The rectangular mounting holes are arranged on the rotor shaft journals and used for mounting the telemetry modules, and chamfer angles are respectively arranged on four corners of each rectangular mounting hole; The first boss is arranged on the inner wall of the outer edge of the rectangular mounting hole; The second bosses are arranged on the inner wall of the inner edge of the rectangular mounting hole, the number of the second bosses is at least two, and the telemetering module is installed between the first bosses and the second bosses in an interference mode; the third bosses are arranged on the two circumferential inner walls of the rectangular mounting hole and are used for being abutted with the circumferential outer wall of the telemetry module; And the baffle plates are respectively arranged on the first boss and the second boss and are used for axially limiting the telemetry model. Further, the first boss is circumferentially offset from the second boss. Further, the interference of the telemetry module during interference installation between the first boss and the second boss is according to, wherein,For interference of the telemetry module when installed in interference between the first boss and the second boss,For the design extrusion force of the telemetry module for interference fit between the first boss and the second boss,,For the coefficient of friction of the telemetry module with the first boss interface,For the lower limit value of the friction force of the contact surface of the telemetry module and the first boss,For the allowable maximum compressive stress of the telemetry module,For the contact area of the telemetry module with the first boss,For the purpose of telemetry of the quality of the module,For telemetry of the radial height of the module centroid point,For maximum operating speed of the engine in which the telemetry module is installed,For the radial cross-sectional area of the telemetry module,For the telemetry module to have a modulus of elasticity in the radial direction,An initial length in a radial direction for the telemetry module;