CN216645140U

CN216645140U - Rotor blade tip position measuring tool

Info

Publication number: CN216645140U
Application number: CN202220070341.6U
Authority: CN
Inventors: 李志平; 陈寿宇; 郑广昇
Original assignee: AECC Commercial Aircraft Engine Co Ltd
Current assignee: AECC Commercial Aircraft Engine Co Ltd
Priority date: 2022-01-12
Filing date: 2022-01-12
Publication date: 2022-05-31
Anticipated expiration: 2032-01-12

Abstract

The utility model provides a rotor blade tip position measuring tool which comprises a pointer, an installation base and a scale, wherein the pointer comprises a first pointer and a second pointer, the pointer is installed on a sliding rail on the surface of the installation base, the direction of the pointer is perpendicular to the sliding rail, the scale is arranged on the surface of the installation base along the direction of the sliding rail so as to read the relative position information of the first pointer and the second pointer, and the first pointer and the second pointer are provided with locking mechanisms so that the first pointer and the second pointer can be relatively fixed with the sliding rail. When in use, the mounting seat of the device is arranged on the longitudinal mounting edge of the split casing, so that the pointer can be moved to a position where the tips of the pre-blades are aligned. The utility model has simple structure, convenient operation and accurate measurement.

Description

Rotor blade tip position measuring tool

Technical Field

The utility model belongs to the field of aero-engine detection, and particularly relates to a rotor blade tip position measuring tool.

Background

The high-pressure rotor of the aircraft engine has the disadvantages of severe working environment, high temperature and high pressure, and can repeatedly bear the influence of high-frequency cyclic stress and temperature alternation for a long time. In order to improve the working efficiency of the aircraft engine, the designed size of the gap between the high-pressure compressor rotor and the casing is very small, and scraping is easy to occur. The inner wall of the engine case is coated with a wear-resistant coating to protect the blade. Even so, once the rotor blades are installed with insufficient precision or worn, the bouncing occurs during the operation process, and the bouncing is easily scraped with the inner wall of the casing which is not covered by the protective coating, so that the efficiency and the service life of the engine are affected, and even serious accidents can be caused. Therefore, the accuracy requirements for the rotor blades are high when the compressor assembly is performed. The axial distance between the rotor blade tip and the edge area of the wear-resistant coating on the inner wall of the casing is an important index for controlling the installation accuracy.

The structure of the blade tip and the casing of the engine rotor is complex, the geometric structure is irregular, and the conventional scale is not easy to measure. The existing special equipment for measuring the position of the blade tip usually needs a complex sensor system, and has complex use process and higher cost. The simple, accurate and easy-to-use rotor blade tip measuring tool has important significance for improving the measuring efficiency and the assembling quality of the engine.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a rotor blade tip position measuring tool which is simple in structure, simple and convenient to operate and high in precision.

According to an aspect of an embodiment of the present invention, there is provided a rotor blade tip position measuring tool, which includes a pointer, a mount, and a scale, wherein the pointer includes a first pointer and a second pointer, the mount includes a slide rail, the first pointer and the second pointer are mounted in parallel in the slide rail, and a measuring direction of the scale is arranged in parallel with the slide rail to allow the first pointer and the second pointer to translate along the slide rail and read relative position information thereof through the scale. And the first pointer and the second pointer are provided with locking mechanisms, so that the first pointer and the second pointer can be locked and fixed at any position of the sliding rail. The device has simple structure and convenient installation, and the gap size can be rapidly read through the ruler by respectively aligning the two pointers with the corresponding positions of the casing and the rotor blade tip.

Preferably, a magnet is arranged in the mounting seat to allow the mounting seat to be fixedly mounted in a magnetic adsorption mode. The magnetic adsorption has high installation freedom and convenient installation and disassembly.

Preferably, the first pointer and the second pointer are provided with a sliding part, the first pointer and the second pointer are slidably clamped in the sliding rail through the sliding part, and the locking mechanism is a fastening bolt arranged on the sliding part so as to allow the first pointer and the second pointer to be abutted against the sliding rail through the fastening bolt. The fastening bolt is simple in structure and convenient to operate.

Optionally, the sliding component is a pointer fixing seat, the first pointer and the second pointer are respectively installed on the corresponding pointer fixing seat, and the first pointer and the second pointer are respectively arranged to be capable of adjusting the fixing positions with the pointer fixing seat along the axial direction of the pointer. The pointer fixing seat can adjust the position of the pointer tip, and the measurement precision is further improved.

Preferably, the scale is an electronic digital display scale. The degree of the electronic scale is simpler and quicker.

Optionally, the scale is a graduated scale, one end of the graduated scale is fixed to the first pointer so that the graduated scale can slide along with the first pointer, and the zero position of the graduated scale is aligned with the first pointer. The graduated scale is lower in cost, and the zero position of the graduated scale and one pointer are relatively fixed, so that the relative distance between the pointers can be directly read.

Preferably, the mounting seat further comprises an inclinometer for reading the inclination angle of the mounting posture of the rotor blade tip position measuring tool. The inclination angle information can help an operator to confirm whether the installation of the measuring tool is in place or not and optimize the measuring result.

Preferably, the mounting seat further comprises a thermometer for reading the temperature of the measurement site. Temperature information is recorded in real time to facilitate temperature compensation of the measurement results.

Optionally, the slide rail is a dovetail slide rail.

Drawings

FIG. 1 is a schematic view of a rotor tip position measurement tool in one embodiment;

FIG. 2 is a partial structural view of a high-pressure compressor of an engine measured in an embodiment.

The meaning of the reference numerals:

1-a first pointer; 2-a second pointer; 3-mounting a base; 4-a slide rail; 5-a graduated scale; 6-mounting holes; 7-pointer fixing seat; 8-a mounting surface; 9-fastening bolts; 10-casing coating; 11-longitudinal mounting edges of the split case; 12-rotor blade leading edge tip; 13-rotor blade exhaust edge blade tip; 14-rotor blades.

The drawings are for purposes of illustrating the utility model so that those skilled in the art can understand the concepts of the utility model and are not intended to limit the utility model.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and are only examples, and should not be used to limit the scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention; the terms "comprising" and "having," and their equivalents, in the description of the utility model and in the claims and in the description of the figures above, are intended to cover non-exclusive inclusion relationships.

In the description of the embodiments herein, the terms "first", "second", and the like are used only to distinguish different objects, and do not indicate relative importance or the number, specific order, or primary-secondary relationship of the technical features involved. In the description of the embodiments herein, "a plurality" means two or more unless specifically limited otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the utility model. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It should be understood by those skilled in the art that the embodiments described herein may be combined with other embodiments without conflict in structure or principle.

In the description of the embodiments herein, the terms "central," "axial," "radial," "circumferential," "length," "upper," "lower," "front," "rear," "horizontal," "vertical," "inner," "outer," and the like refer to orientations or positional relationships that are based on the orientation or positional relationships illustrated in the drawings, which are intended to facilitate the description of the features and simplified representation of the embodiments, and are not intended to limit the devices or components to which they pertain to having to be oriented or configured and operated in a particular orientation, and should not be construed as limiting the embodiments of the utility model.

In the description of the embodiments herein, unless explicitly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral; either directly or indirectly through other intermediaries. To those skilled in the art, the specific meanings of the above terms in specific embodiments should be understood in conjunction with the specific circumstances.

According to one embodiment of the present invention, a rotor tip position measurement tool is provided, as shown in FIG. 1. The tool comprises a first pointer 1, a second pointer 2 and a mounting base 3. The first pointer 1 and the second pointer 2 are mounted on a slide rail 4 arranged on the upper surface of the mounting base through a pointer fixing base 7, the slide rail 4 is configured as a dovetail groove slide rail, the pointer fixing base 7 is slidably clamped in the slide rail 4, and the pointing directions of the first pointer 1 and the second pointer 2 are perpendicular to the direction of the slide rail. Be provided with fastening bolt 9 on the pointer fixing base 7, make it can be through the mode of screwing up the pointer fixing base top tight on slide rail 4 to play the effect of fixed pointer position, in order to avoid taking place to slide in the measurement process and arouse the error. On the mounting base 3, there is also a scale 5 fixed through the mounting hole 6, the measuring direction of the scale 5 is parallel to the slide rail 4, and the position information of the first pointer 1 and the second pointer 2 can be read through the scale 5. In other embodiments, the pointer may also be locked and fixed on the sliding track 4 by a fixing clip or other positioning mechanism, and the sliding track 4 may also be configured as a circular sliding rod or a trapezoidal sliding track or other forms.

The lower surface of the mounting seat 3 is a mounting surface 8, and the mounting surface 8 is provided with a magnet which can be adsorbed on the mounting edge of the split case. In some embodiments, the magnets on the mounting surface 8 may be omitted and fixed to the casing by other clamps or bolts.

The pointer fixing base 7 allows the first pointer 1 and the second pointer 2 to adjust the mounting positions in the axial direction (length direction) of the pointers so as to be more accurately aligned with the measurement positions. In some other embodiments, the pointer fixing base 7 may be omitted, and the first pointer 1 and the second pointer 2 may be directly mounted on the sliding rail 4 through an integrated sliding structure such as a sliding block or a sliding ring.

In some embodiments, the scale 5 is configured as an electronic digital display scale, capable of directly reading the length of the relative distance between the first pointer 1 and the second pointer 2.

In some embodiments, the scale 5 is not fixed to the mounting base 3, but is fixed to the first pointer 1 and moves with it on the sliding track 4, and its zero position is always aligned with the axis of the first pointer 1, so as to read the distance length between the first pointer 1 and the second pointer 2 directly through the scale.

In the preferred embodiment, an inclinometer, including but not limited to a digital readout inclinometer and a bubble level, is also provided on mount 3. The spirit level can reflect the installation attitude of the measuring tool so as to be adjusted during the installation process and optimize the measuring result according to the inclination state.

In the preferred embodiment, a thermometer is also provided on the mounting base 3 to read temperature information of the measurement site so as to perform temperature correction on the measurement result.

Taking the rotor blade tip position measuring tool shown in fig. 1 as an example, and referring to fig. 2, the method for measuring the position of the blade tip of the rotor blade 14 is as follows:

firstly, the mounting surface 8 of the rotor blade tip position measuring tool is adsorbed on a longitudinal mounting edge 11 of an engine facing-open casing to complete mounting, so that the direction of a sliding rail is consistent with the axial direction of the casing, and the moving range of a pointer covers the distribution range of a casing coating 10.

And secondly, adjusting the initial position of the first pointer 1 to be aligned with the casing coating 10, adjusting the second pointer 2 to be aligned with the blade tip of the air inlet edge of the rotor blade, tightening the fastening bolt 9 to fix the first pointer 1 and the second pointer 2 at the measuring position respectively, and reading the readings corresponding to the first pointer 1 and the second pointer 2 on the scale 5.

And thirdly, subtracting the numerical values read in the second step to obtain the axial position value of the blade tip at the air inlet edge of the blade.

The fourth step, adjust the second pointer 2, so that it is aligned with the end position of the casing coating 10,

the first pointer 1 is adjusted to be aligned with the exhaust edge tip of the rotor blade, and the degrees corresponding to the first pointer 1 and the second pointer 2 on the scale 5 are respectively read.

And fifthly, subtracting the numerical values read by the fourth part to obtain the axial position value of the blade tip of the exhaust edge of the blade.

The rotor blade tip position measuring tool provided by other embodiments can also measure the blade tip position through similar steps, and corresponding steps may have certain differences according to different specific structures.

It should be understood that the above embodiments are only intended to describe the technical solutions of the embodiments of the present invention in detail with reference to the accompanying drawings, so that those skilled in the art can understand the technical concepts of the present invention, and the present invention is not intended to be limited. The scope of the utility model is intended to cover the modifications and equivalent arrangements of parts and features of the embodiments, as well as the combination of different embodiments without any conflict in structure or principle, which falls within the scope of the present invention.

Claims

1. The utility model provides a rotor apex position measuring tool, includes pointer, mount pad and scale, its characterized in that: the pointer comprises a first pointer and a second pointer, the mounting seat comprises a sliding rail, the first pointer and the second pointer are mounted in parallel in the sliding rail, and the measuring direction of the scale is arranged in parallel with the sliding rail so as to allow the first pointer and the second pointer to translate along the sliding rail and read relative position information of the first pointer and the second pointer through the scale;

and the first pointer and the second pointer are provided with locking mechanisms, so that the first pointer and the second pointer can be locked and fixed at any position of the sliding rail.

2. The rotor blade tip position measuring tool of claim 1, wherein a magnet is disposed within said mounting block to allow said mounting block to be fixedly mounted in a magnetically attractive manner.

3. The rotor blade tip position measuring tool according to claim 1, wherein the first pointer and the second pointer are provided with a sliding member, the first pointer and the second pointer are slidably clamped in the slide rail through the sliding member, and the locking mechanism is a fastening bolt provided on the sliding member to allow the first pointer and the second pointer to be tightened on the slide rail through the fastening bolt.

4. The rotor blade tip position measuring tool according to claim 3, wherein the sliding member is a pointer holder, the first pointer and the second pointer are each mounted on the corresponding pointer holder, and the first pointer and the second pointer are each configured to enable adjustment of a fixing position of the pointer to the pointer holder in a pointer axial direction.

5. The tool for measuring the position of the rotor blade tip as claimed in claim 1, 2 or 3, wherein the scale is an electronic digital display scale.

6. The rotor blade tip position measuring tool according to claim 1, 2 or 3, wherein the scale is a graduated scale, the scale is fixed to the first pointer so as to be slidable along the first pointer, and a zero position of the scale is aligned with the first pointer.

7. The rotor blade tip position measuring tool according to claim 1, 2 or 3, wherein the mounting base further comprises an inclinometer for reading an inclination angle of the mounting posture of the rotor blade tip position measuring tool.

8. A rotor blade tip position measuring tool as claimed in claim 1, 2 or 3, wherein the mounting block further comprises a thermometer for reading the temperature at the site of measurement.

9. A rotor blade tip position measuring tool as in claim 1, 2 or 3 wherein the slide is a dovetail slide.