CN-122015753-A - Device and method for measuring front edge of power diffuser blade

CN122015753ACN 122015753 ACN122015753 ACN 122015753ACN-122015753-A

Abstract

The application relates to the technical field of damage inspection, in particular to a device and a method for measuring the front edge of a blade of a power diffuser, wherein the device comprises a mounting platform, a rotating shaft structure, a measuring needle and a connecting component, the rotating shaft structure is rotationally connected with the mounting platform, the first end and the pivot structure of measuring needle are connected, and the second end outwards extends and is used for measuring, and coupling assembling sets up between pivot structure and measuring needle for adjust the length of stretching out of measuring needle. The device realizes stable connection with a piece to be measured through the mounting platform, provides a reliable reference for measurement, enables the measuring needle to rotate by taking a fixed point as a circle center through the design of the rotating shaft structure, simulates the circular arc track of the front edge of the blade, is simple and convenient to operate and accurate in movement track, enables the length of the measuring needle to be adjustable through the arrangement of the connecting component, can adapt to blade measurement requirements of different types or wear degrees, improves the universality and measurement precision of the device, greatly improves the working efficiency and saves working hours.

Inventors

HE FEI
LU YUKAI
ZHAO HAOYU
ZHANG MING
XUE JIWEI
Huang Fangzhou
SUN BOHAN
LIANG SHIGUANG
Wu Meihan

Assignees

沈阳北方飞机维修有限公司

Dates

Publication Date: 20260512
Application Date: 20260413

Claims (10)

1. A power diffuser vane leading edge measurement apparatus, comprising: A mounting platform; the rotating shaft structure is rotationally connected with the mounting platform; the first end of the measuring needle is connected with the rotating shaft structure, and the second end of the measuring needle extends outwards for measurement; The connecting component is arranged between the rotating shaft structure and the measuring needle and is used for adjusting the extending length of the measuring needle.
2. The power diffuser blade leading edge measurement device of claim 1, wherein the mounting platform comprises: the base is provided with a mounting hole site; The fastener is arranged on the mounting hole site and used for connecting the base and the piece to be measured.
3. The power diffuser blade leading edge measurement device of claim 1, wherein the connection assembly comprises: the first stop piece is arranged at the first end of the measuring needle, is detachably connected with the measuring needle, and is positioned at one side of the rotating shaft structure.
4. A power diffuser vane leading edge measurement apparatus as claimed in claim 3, wherein, The first stop comprises a nut which is in threaded connection with the measuring needle.
5. The power diffuser blade leading edge measurement device of claim 3, wherein the connection assembly further comprises: The second stop piece is connected with the measuring needle, and the second stop piece and the first stop piece are respectively positioned at two sides of the rotating shaft structure; the first elastic piece is arranged on the measuring needle and is positioned between the second stop piece and the rotating shaft structure.
6. The power diffuser vane leading edge measurement apparatus of claim 1, wherein said spindle structure comprises: The shaft piece is rotationally connected with the mounting platform; And the limiting assembly is connected with the shaft piece and used for axially limiting the shaft piece.
7. The power diffuser vane leading edge measurement apparatus of claim 6, The spacing subassembly includes: The third stop piece is arranged at one end of the shaft piece, which is far away from the measuring needle, and is in threaded connection with the shaft piece; the second elastic piece is arranged on the shaft piece and is positioned between the mounting platform and the measuring needle.
8. A method of dynamic diffuser blade leading edge measurement using the dynamic diffuser blade leading edge measurement apparatus of any one of claims 1 to 7, the method comprising: Fixing the mounting platform on a piece to be measured; Rotating the rotating shaft structure to drive the measuring needle to move to the position of the front edge of the blade of the piece to be measured; Judging whether the measuring needle intersects with the front edge of the blade or not: if the blades are intersected, judging that the wind erosion quantity of the front edge of the blade meets the continuous use requirement; If the wind erosion amount does not intersect, the wind erosion amount of the front edge of the blade is judged to exceed the maximum wind erosion amount, and the blade cannot be used continuously.
9. The method of claim 8, further comprising the step of, when it is determined that the measurement needle intersects the blade leading edge, continuously measuring: adjusting the extension length of the measuring needle to retract the measuring needle; Rotating the rotating shaft structure to enable the measuring needle to move to the front edge of the next blade to be measured beyond the current blade; And adjusting the extension length of the measuring needle so that the measuring needle is reset to the original extension length, and continuously executing the step of judging whether the measuring needle intersects with the front edge of the blade.
10. The method of claim 8, further comprising the step of height adjustment if the blade leading edge is inclined relative to the plane of rotation of the shaft structure: and adjusting the height of the rotating shaft structure extending out of the mounting platform so as to change the distance between the measuring needle and the to-be-measured piece.

Description

Device and method for measuring front edge of power diffuser blade Technical Field The application relates to the technical field of damage inspection, in particular to a device and a method for measuring the front edge of a blade of a power diffuser. Background The power diffuser is a core key component in the APS3200 type auxiliary power device, is widely applied to aircrafts such as civil airliners and the like, and has the main application scene positioned at the downstream of a compressor of the power device, and has the functions of guiding and rectifying high-speed compressed air so as to ensure that air flow stably enters the next stage component. The tiny particles or high-speed flow field in the compressed air can cause the front edge of the blade of the power diffuser to inevitably generate slight or serious wind erosion phenomenon under the severe working conditions of high temperature, high pressure and high-speed airflow scouring for a long time. The pneumatic outline precision of the power diffuser is directly related to the overall operation efficiency and safety of the auxiliary power device, so that after the auxiliary power device is decomposed and overhauled in a factory, the wind erosion condition of the power diffuser must be strictly checked and precisely quantified to evaluate whether the wind erosion condition meets the continuous use airworthiness standard or not, and the method has extremely important significance in the aviation maintenance engineering. The existing power diffuser structurally presents a highly complex three-dimensional space characteristic, the main body of the power diffuser consists of an annular substrate and a plurality of guide blades distributed along the circumferential direction, the guide blades are not vertically arranged, but are obliquely welded in grooves of the substrate at specific drilling angles, and boss structures with smaller heights are respectively designed below and above the guide blades. Based on the above complex physical structure, the existing measuring device and method mainly rely on traditional mechanical measuring devices, such as vernier calipers or plugs, when detecting the wind erosion of the power diffuser, the measuring principle is to attach the molded surface of the template tool to the front edge of the guide blade and the side surface of the boss, and indirectly estimate and judge the material quantity lost by wind erosion of the front edge of the blade by observing the light transmission gap between the tool and the actual molded surface of the blade or directly reading the thickness of the plugs. However, based on the structure and measurement principle of the statistics transmission device and the tool, great obstacles are encountered in practical operation, on one hand, because the inner space of the power diffuser is extremely narrow and the blade angle is in the limit of drilling, the traditional measuring tool can not smoothly extend into and find the measurement angle to effectively measure, and on the other hand, even if the tool attached to the side face of the upper and lower bosses with smaller height is designed, slight attaching gaps are easily generated due to space limitation and interference of an oblique welding structure, and the shielding of the guide blades seriously influences the sight of an observer, so that the gap size can not be accurately interpreted. Therefore, the traditional gauge cannot be precisely attached to and angularly aligned with the measured surface due to limited narrow space and complicated inclined structure of the power diffuser, so that the wind erosion amount of the blade is always difficult to accurately measure and quantify. Disclosure of Invention In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. This section of the invention is not intended to limit the critical and essential features of the claimed subject matter, nor is it intended to be used as an attempt to determine the scope of the claimed subject matter. The present invention aims to solve at least one of the technical problems existing in the prior art or related art. To this end, a first aspect of the invention provides a power diffuser vane leading edge measurement device. A second aspect of the invention provides a method of dynamic diffuser vane leading edge measurement. In view of this, a first aspect of an embodiment according to the present application proposes a power diffuser vane leading edge measuring device comprising: A mounting platform; the rotating shaft structure is rotationally connected with the mounting platform; the first end of the measuring needle is connected with the rotating shaft structure, and the second end of the measuring needle extends outwards for measurement; The connecting component is arranged between the rotating shaft structure and the measuring needle and is used for adjusting the e