A method for measuring the distortion degree of the blade profile under the rotating state of the engine rotor blade
A technology of rotor blades and rotation state, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., and can solve the problems of undisclosed measurement of rotor blade rotation state blade shape, measurement difficulties, etc.
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Embodiment 1
[0077] Embodiment 1: A method for measuring the degree of distortion of an engine rotor blade in a rotating state,
[0078] (1) Calibration steps of the laser sensor before measurement.
[0079] (2) Install the laser tip timing sensor: when the blade is in a static state, install the laser tip timing sensor distributed along the axial direction at the highest part of the casing corresponding to the blade. The axial distance set by the laser tip timing sensor is: 10% of the chord length of the parietal blade; said laser tip timing sensors are at least three, and one of them must include a laser tip timing sensor located at 50%; and keep the laser tip timing sensor in a horizontal state, It is used to ensure that the sensing end of the laser tip timing sensor is parallel to the blade top, and to determine the distance from the sensing end of the laser tip timing sensor to the rotation center of the blade hub; figure 1 , the installation schematic diagram of the measuring device...
Embodiment 2
[0132] Embodiment 2 is the same as Embodiment 1, except that there are three laser blade tip timing sensors, which must include a laser blade tip timing sensor set at 50%;
[0133] In the step (1), three laser tip timing sensors distributed along the axial direction are installed at the top of the casing corresponding to the blade, that is, the attached Figure 6, the axial distances set by the laser tip timing sensor correspond to the 25%, 50%, and 75% chord lengths of the blade tip respectively. After step (3), four point coordinates of the front and rear edges of the blade can be obtained, as attached Figure 7 shown. attached Figure 8 Shown are the tip clearance values measured by the laser tip timing sensor at 50% of the chord length. The signals received by the laser blade tip timing sensors placed at 25% and 75% of the chord length of the blade tip are respectively: the first signal and the second signal, as attached Figure 9 ;
[0134] at ΔT 1 During the perio...
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