Run-out measurement positioning device and method

Abstract

The runout measurement positioning device comprises a rotary table and at least three positioning wheels, a plurality of mounting holes are formed in the rotary table in the circumferential direction of the rotary table, the at least three positioning wheels are rotatably connected into the mounting holes respectively, each positioning wheel is of an eccentric structure, the positioning wheels are rotated, and the positioning wheels are driven by the rotary table to rotate. And the minimum distance between the positioning wheel and the center of the rotary table can be adjusted, so that the rotary bodies with different diameters can be positioned and aligned on the rotary table.

Description

Technical Field

[0001] The present invention relates to the technical field of engine assembly, and particularly relates to a runout measurement and positioning device and method. Background Art

[0002] Aero-engines belong to high-precision rotary machinery. During the installation process, high coaxiality needs to be ensured for each casing. As Figure 1 shown, the main casings constituting the engine include a fan casing, a core casing, an intermediate casing, a turbine casing, and a rear turbine casing. Among them, the core casing can be further divided into a high-pressure compressor casing, a combustion chamber casing, a high-pressure turbine casing, etc. These casings vary in size, and there is a large difference in the diameters of the casing mounting flanges. Before the engine installation, runout measurement needs to be carried out for each component casing.

[0003] Runout measurement is usually carried out on a high-precision turntable. During runout measurement, it is necessary to align the placement position of each casing on the turntable surface so that the theoretical axis of the casing is consistent with the axis of the turntable. Under the existing measurement process, there are two casing alignment methods: 1) realizing the coaxial placement of each casing and the turntable through a customized mounting seat; 2) aligning the casing by means of repeated adjustment. If method 1 is adopted, since there is a large difference in the sizes of the mounting flanges of each casing, it is necessary to manufacture multiple mounting seats with different sizes, and the process cost is extremely high; if method 2 is adopted, it is necessary to repeatedly tap or push the casing from multiple angles according to the real-time measurement data until the axis of the casing is consistent with the axis of the turntable. The adjustment time is relatively long, and it usually takes 4 - 8 hours to align the placement position of a casing on the turntable. Summary of the Invention

[0004] An object of the present invention is to provide a runout measurement and positioning device, which can realize the coaxial placement of multiple engine casings on the turntable at low cost and high efficiency.

[0005] The above-mentioned runout measurement and positioning device includes:

[0006] A turntable, with a plurality of mounting holes provided along the circumferential direction of the turntable; and

[0007] At least three positioning wheels, respectively rotatably connected in the mounting holes;

[0008] Wherein, by rotating the positioning wheels, the minimum distance between the positioning wheels and the center of the turntable can be adjusted to realize the positioning and alignment of rotary bodies with different diameters on the turntable.

[0009] In one or more embodiments, the positioning wheel has an eccentric structure, and an eccentric hole is provided on the positioning wheel. The runout measurement and positioning device further includes a connecting shaft and a compression nut. One end of the connecting shaft is fixed in the mounting hole, and the other end passes through the eccentric hole to enable rotatable connection between the positioning wheel and the mounting hole. After the rotation adjustment of the positioning wheel is completed, the positioning wheel is fixed by the compression nut.

[0010] In one or more embodiments, one end of the connecting shaft is fixed in the mounting hole by means of threaded connection.

[0011] In one or more embodiments, the positioning wheel is elliptical.

[0012] In one or more embodiments, a plurality of mounting holes are uniformly provided along the radial direction of the turntable.

[0013] In one or more embodiments, an even number of scale lines are provided along the circumferential direction of the positioning wheel.

[0014] In one or more embodiments, a concave cavity is provided on one end face of the positioning wheel close to the turntable.

[0015] In one or more embodiments, the rotating body is an engine casing, including a fan casing, a core engine casing, an interstage casing, a turbine casing, and a post-turbine casing.

[0016] Another object of the present invention is to provide a runout measurement and positioning method, which can realize the coaxial placement of multiple engine casings on the turntable at low cost and high efficiency.

[0017] The above-mentioned runout measurement and positioning method includes the following steps:

[0018] S1. Provide the runout measurement and positioning device as described above. In the runout measurement and positioning device, the center distance between adjacent mounting holes provided along the radial direction of the turntable is L, the maximum distance between the rim of the positioning wheel and the rotation center of the positioning wheel is r1, and the minimum distance is r2;

[0019] S2. The radius of the mounting edge of the engine casing to be measured is A, and n is calculated according to the formula nL - r1 ≤ A ≤ nL - r2;

[0020] S3. Install the positioning wheel on the nth mounting hole;

[0021] S4. Calculate N according to the formula N = [A - (n - 1)L] / 2(r2 - r1), rotate the positioning wheel to the position of the Nth scale line, and fix the positioning wheel;

[0022] S5. Place the engine casing to be measured within the inscribed circle area formed by at least three of the positioning wheels to achieve preliminary positioning and alignment of the engine casing to be measured.

[0023] In one or more embodiments, the following steps are further included:

[0024] S6. Rotate the turntable to perform runout measurement to obtain measurement data;

[0025] S7. Adjust the positioning wheels according to the measurement data to finely adjust the placement position of the engine casing to be measured, achieving final precise alignment of the engine casing to be measured.

[0026] The runout measurement and positioning device and method described above can quickly place engine casings of various diameters on the turntable, improving the efficiency of runout measurement of the casing. During the positioning process, according to the diameter of the mounting flange of the engine casing to be measured, appropriate mounting holes can be selected to install the positioning wheels, and the installation angle of the positioning wheels can be adjusted so that the distance between the positioning wheels and the center of the turntable is the radius dimension of the casing mounting flange. The centering placement of the casing can be achieved through multiple positioning wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other features, properties, and advantages of the present invention will become more apparent from the following description in conjunction with the drawings and embodiments, where:

[0028] Figure 1 is a schematic structural diagram of an aeroengine according to an embodiment of the present application.

[0029] Figure 2 is a top view of the engine casing positioned with the large end facing down according to an embodiment of the present application.

[0030] Figure 3 is a perspective view of the engine casing positioned with the large end facing down according to an embodiment of the present application.

[0031] Figure 4 is a top view of the engine casing positioned with the small end facing down according to an embodiment of the present application.

[0032] Figure 5 is a perspective view of the engine casing positioned with the small end facing down according to an embodiment of the present application.

[0033] Figure 6 is a perspective view of the runout measurement and positioning device according to an embodiment of the present application.

[0034] Figure 7 is a side view of the positioning wheel according to an embodiment of the present application.

[0035] Figure 8It is a top view of a positioning wheel according to an embodiment of the present application. Detailed implementation manners

[0036] The present invention will be further described below in conjunction with specific embodiments and the accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment. It should be noted that these and subsequent other drawings are only examples, and they are not drawn under the condition of equal proportions, and should not be used to limit the actual protection scope required by the present invention.

[0037] According to one aspect of the present application, a runout measurement and positioning device is provided, which can realize the coaxial placement of multiple engine casings on a turntable at low cost and high efficiency. As Figures 2 to 6 shown, the runout measurement and positioning device includes a turntable 2 and at least three positioning wheels 1. A plurality of mounting holes 4 are formed along the circumference of the turntable 2, and the positioning wheels 1 are respectively rotatably connected in the mounting holes 4. Among them, by rotating the positioning wheel 1, the minimum distance between the positioning wheel 1 and the center of the turntable 2 can be adjusted to realize the positioning and alignment of a rotating body 3 with different diameters on the turntable 2.

[0038] Among them, as Figure 1 shown, the rotating body 3 can be an engine casing, including a fan casing 31, a core engine casing 32, an intermediate casing 33, a turbine casing 34, and a post-turbine casing 35. The above-mentioned multiple engine casings are of different sizes and the diameters of the casing mounting flanges are different.

[0039] By using the above-mentioned runout measurement and positioning device, during the positioning process of the engine casing, only the installation angles of the multiple positioning wheels 1 need to be adjusted to ensure that the distance between the rim of each positioning wheel 1 and the center of the turntable 2 is consistent with the radius dimension of the engine casing mounting flange, so as to realize the centering placement of the engine casing. The design principle of this runout measurement and positioning device is simple. The positioning wheel with an eccentric structure used has a simple structure and is convenient to install, has extremely high versatility, can realize the centering placement of engine casings with different diameters on the turntable 2, has extremely low process costs, and greatly improves the positioning and alignment efficiency of the engine casing.

[0040] In one or more embodiments, as Figure 7As shown in the figure, the positioning wheel 1 has an eccentric structure. An eccentric hole is provided on the positioning wheel 1. The runout measurement positioning device further includes a connecting shaft 6 and a compression nut 7. One end of the connecting shaft 6 is fixed in the mounting hole 4, and the other end passes through the eccentric hole to realize the rotatable connection between the positioning wheel 1 and the mounting hole 4. After the rotation adjustment of the positioning wheel 1 is completed, the positioning wheel 1 is fixed by the compression nut 7. The connecting shaft 6 provides a rotation axis for the positioning wheel 1, and the positioning wheel 1 is fixed by the compression nut 7 to prevent the positioning wheel 1 from running out of position during the runout measurement process.

[0041] Among them, the eccentric structure means that the rotation center of the positioning wheel 1 is offset from the geometric center of the positioning wheel 1, so that the minimum distance between the positioning wheel rim and the center of the turntable 2 can be adjusted by rotating the positioning wheel 1, realizing the centering placement of engine casings with different diameters on the turntable.

[0042] Furthermore, one end of the connecting shaft 6 can be fixed in the mounting hole 4 by means of threaded connection, which is firmly connected and convenient for loading and unloading.

[0043] In one or more embodiments, the positioning wheel is oval, and the connecting shaft 1 is connected to the center of the positioning wheel 1. Similarly, the minimum distance between the positioning wheel rim and the center of the turntable 2 can be adjusted by rotating the positioning wheel 1, realizing the centering placement of engine casings with different diameters on the turntable.

[0044] In one or more embodiments, a plurality of mounting holes 4 are evenly provided along the radial direction of the turntable 2. The positioning wheel 1 is provided with an even number of scale lines 12 along its circumferential direction, which can be used to quickly identify the installation angle of the positioning wheel 1 and quickly realize the homomorphic installation of multiple positioning wheels 1.

[0045] Specifically, by arranging a plurality of equally spaced mounting holes 4 along the radial direction on the tabletop of the turntable 2 in a uniformly distributed manner, and the turntable 2 is provided with angular scale lines 5. According to the diameter size of the installation edge of the engine casing to be measured, select a suitable mounting hole 4 to install the positioning wheel 1, rotate the positioning wheel 1 to the required installation angle, align a certain scale line 12 on the positioning wheel 1 with the angular scale line 5 of the turntable, and fix the positioning wheel 1 at this installation angle, then the adjustment of the runout measurement positioning device can be completed.

[0046] In one or more embodiments, as Figure 7 shown, a concave cavity 11 is provided on the end face of the positioning wheel 1 close to the turntable 2, which can avoid the step height of the connecting shaft 6 and ensure the fitting of the positioning wheel 1 and the tabletop of the turntable 2, meeting the positioning and alignment of engine casings with different thicknesses on the turntable.

[0047] According to another aspect of the present application, a runout measurement positioning method is provided. Referring to Figure 6 and Figure 8 , the runout measurement positioning method includes the following steps:

[0048] S1. Provide the runout measurement and positioning device as described above. In the runout measurement and positioning device, the center distance between adjacent mounting holes 4 formed radially along the turntable 2 is L, the maximum distance between the rim of the positioning wheel 1 and the rotation center of the positioning wheel 1 is r1, and the minimum distance is r2;

[0049] S2. The radius of the mounting edge of the engine casing to be measured is A. Calculate n according to the formula nL - r1 ≤ A ≤ nL - r2;

[0050] S3. Mount the positioning wheel 1 on the nth mounting hole 4;

[0051] S4. Calculate N according to the formula N = [A - (n - 1)L] / 2(r2 - r1), rotate the positioning wheel 1 to the position of the Nth graduation line 12, and fix the positioning wheel 1;

[0052] S5. Place the engine casing to be measured into the inscribed circle area formed by at least three positioning wheels 1 to achieve the preliminary positioning and alignment of the engine casing to be measured.

[0053] Further, the runout measurement and positioning method may further include the following steps:

[0054] S6. Rotate the turntable to perform runout measurement to obtain measurement data;

[0055] S7. Adjust the positioning wheel according to the measurement data to finely adjust the placement position of the engine casing to be measured to achieve the final precise alignment of the engine casing to be measured.

[0056] The runout measurement and positioning device adopted by the above runout measurement and positioning method can realize the rapid placement of engine casings with various diameters on the turntable 2, improving the efficiency of casing runout measurement. During the positioning process, according to the diameter size of the mounting edge of the engine casing to be measured, a suitable mounting hole 4 can be selected to mount the positioning wheel 1, and the mounting angle of the positioning wheel 1 can be adjusted so that the distance between the rim of the positioning wheel 1 and the center of the turntable 2 is the radius dimension of the casing mounting edge. The centering placement of the casing can be achieved through multiple positioning wheels 1.

[0057] Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. A runout measurement and positioning device, characterized in that: include: A turntable, with a plurality of mounting holes formed along the circumference of the turntable; as well as At least three positioning wheels, respectively rotatably connected in the mounting holes; Wherein, by rotating the positioning wheel, the minimum distance between the positioning wheel and the center of the turntable can be adjusted to achieve positioning and alignment of rotating bodies with different diameters on the turntable.

2. The jitter measurement and positioning device according to claim 1, characterized in that: The positioning wheel is an eccentric structure, and an eccentric hole is opened on the positioning wheel. The runout measurement positioning device also includes a connecting shaft and a clamping nut. One end of the connecting shaft is fixed in the mounting hole, and the other end passes through the eccentric hole to realize the rotatable connection between the positioning wheel and the mounting hole. After the rotation adjustment of the positioning wheel is completed, the positioning wheel is fixed by the clamping nut.

3. The jitter measurement and positioning device according to claim 2, characterized in that: One end of the connecting shaft is fixed in the mounting hole by threaded connection.

4. The jitter measurement and positioning device according to claim 1, characterized in that: The positioning wheel is oval in shape.

5. The jitter measurement and positioning device according to claim 1, characterized in that: A plurality of mounting holes are evenly arranged along the radial direction of the turntable.

6. The jitter measurement and positioning device according to claim 5, characterized in that: The positioning wheel is provided with an even number of scale lines along its circumference.

7. The jitter measurement and positioning device according to claim 1, characterized in that: A concave cavity is arranged on an end surface of one side of the positioning wheel close to the turntable.

8. The jitter measurement and positioning device according to claim 1, characterized in that: The rotating body is an engine casing, including a fan casing, a core engine casing, an interstage casing, a turbine casing and a turbine rear casing.

9. A method for measuring and positioning a runout, characterized in that: The following steps are involved: S1. Provide a jitter measurement and positioning device as claimed in claim 6, wherein the center distance between adjacent mounting holes opened along the radial direction of the turntable is L, the maximum distance between the rim of the positioning wheel and the rotation center of the positioning wheel is r1, and the minimum distance is r2; S2, the radius of the mounting edge of the engine casing to be tested is A, and n is calculated according to the formula nL-r1≤A≤nL-r2; S3, installing the positioning wheel on the nth mounting hole; S4. Calculate N according to the formula N[A-(n-1)L] / 2(r2-r1), rotate the positioning wheel to the position of the Nth scale line, and fix the positioning wheel; S5, placing the engine casing to be tested in an inscribed circle area formed by at least three positioning wheels to achieve preliminary positioning and alignment of the engine casing to be tested.

10. The jitter measurement and positioning device according to claim 9, characterized in that: The following steps are also included: S6, rotating the turntable to perform runout measurement and obtain measurement data; S7, adjusting the positioning wheel according to the measurement data to make a slight adjustment to the placement position of the engine casing to be tested, so as to achieve the final precise alignment of the engine casing to be tested.

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