A flexible long rotor installation centering method

Abstract

The present application relates to a kind of flexible long rotor installation centering method.The present application includes the center height of the center hole of each front support and rear support is adjusted to the difference of the center height of reference flange within first error range;Flexible long rotor is hoisted horizontally, respectively, the center height of the front end of flexible long rotor, first simulation disc, left boss, middle boss, right boss, second simulation disc is adjusted to the difference of the center height of front support within second error range;The front end of flexible long rotor is passed through front support and is connected to installation flange, the rear end of flexible long rotor is connected with rear support;Unhook, the horizontal position deviation and vertical position deviation of installation flange relative to reference flange are adjusted to third error range, and front support is fixed;The horizontal position deviation and vertical position deviation between first simulation disc and second simulation disc are adjusted to fourth error range, and rear support is fixed.The present application improves the accuracy and reliability of flexible long rotor installation centering.

Description

Technical Field

[0001] The invention relates to the technical field of civil aviation equipment testing, in particular to a method for installing and centering a flexible long rotor. Background Art

[0002] With the development of aero-engine technology, power-to-weight ratio requirements continue to increase. Rotor design is moving towards flexible rotors with large aspect ratios and high speeds. This results in the rated operating speed of the engine often exceeding the first two critical speeds, and the dynamic characteristics are becoming increasingly complex. Current research on flexible long rotors focuses primarily on theoretical calculations. However, due to factors such as manufacturing and assembly, the actual rotor characteristics often deviate significantly from theoretical calculations. Therefore, experimental research on flexible long rotors is essential.

[0003] The main structure of the flexible long rotor is a slender shaft with two simulation disks. Its processing and assembly have very high requirements. When installing it on the test bench, how to ensure that the slender shaft does not deform and the installation meets the operating accuracy requirements is a technical problem that needs to be solved urgently. Therefore, the present invention provides a method for installing and centering a flexible long rotor to solve this problem. Summary of the Invention

[0004] To this end, the present invention provides a method for installing and centering a flexible long rotor, so as to improve the accuracy of installing and centering the flexible long rotor.

[0005] To solve the above technical problems, the present invention provides a method for installing and centering a flexible long rotor, comprising the following steps:

[0006] S1. Arrange a reference flange, a front support, and a rear support in sequence on a horizontal plane, and adjust the center heights of the center holes of the front support and the rear support so that the difference between the center heights of the reference flange and the center heights of the front support and the rear support is within a first error range;

[0007] S2. Horizontally hoist the flexible long rotor, and adjust the center heights of the front end of the flexible long rotor, the first simulated plate, the left boss, the middle boss, the right boss, and the second simulated plate to within a second error range relative to the center height of the front support;

[0008] S3, passing the front end of the flexible long rotor through the front support and connecting the front end to the mounting flange, and connecting the rear end of the flexible long rotor to the rear support;

[0009] S4, releasing the hoisting, adjusting the horizontal position deviation and the vertical position deviation of the mounting flange relative to the reference flange to a third error range, and fixing the front support;

[0010] S5. Adjust the horizontal position deviation and the vertical position deviation between the first simulation disk and the second simulation disk to a fourth error range, and fix the rear support.

[0011] In one embodiment of the present invention, step S1 includes:

[0012] In the direction of gravity, use a height gauge to measure the heights of the highest and lowest points of the reference flange relative to the horizontal plane, the highest and lowest points of the center hole of the front support relative to the horizontal plane, and the highest and lowest points of the center hole of the rear support relative to the horizontal plane;

[0013] Obtaining the center height of the reference flange according to the heights of the highest point and the lowest point of the reference flange relative to the horizontal plane;

[0014] Obtaining the center height of the center hole of the front support according to the heights of the highest point and the lowest point of the center hole of the front support relative to the horizontal plane;

[0015] The center height of the center hole of the rear support is obtained according to the heights of the highest point and the lowest point of the center hole of the rear support relative to the horizontal plane.

[0016] In one embodiment of the present invention, the height gauge includes a bracket and a measuring arm connected to the bracket.

[0017] In one embodiment of the present invention, step S1 includes:

[0018] The center heights of the center holes of the front support and the rear support are adjusted by respectively arranging gaskets on the bottom surfaces of the front support and the rear support and changing the thickness of the gaskets.

[0019] In one embodiment of the present invention, a support block placed on the horizontal plane is provided below the bottom end of each of the front support and the rear support, and a bolt is connected to the bottom end of each of the front support and the rear support and the upper end surface of the support block. A pad area for padding a gasket is formed between the bottom surface of each of the front support and the rear support and the upper end surface of the support block, the pad area is centered on the bolt, and the width of the circumferential area of ​​the bolt is not less than twice the diameter of the bolt.

[0020] In one embodiment of the present invention, in step S2, the method for horizontally hoisting a long flexible rotor includes:

[0021] A lifting rope is connected to the first shaft neck of the first simulation disk and the second shaft neck of the second simulation disk respectively, the two lifting ropes are connected to the crossbeam, and a lifting hook is set at the center of the crossbeam to connect to an external power source.

[0022] In one embodiment of the present invention, in step S4, the method of adjusting the horizontal position deviation and the vertical position deviation of the mounting flange relative to the reference flange to a third error range includes:

[0023] Detect the detection position of the detection gauge on the outer circle of the reference flange, and connect the extension arm of the detection gauge to the mounting flange;

[0024] Rotate the flexible long rotor along its central axis, and record the first, second, third, and fourth readings of the test meter at rotation angles of 0°, 90°, 180°, and 270°, respectively;

[0025] Obtaining a horizontal position deviation of the mounting flange relative to the reference flange based on the second and fourth readings, and obtaining a vertical position deviation of the mounting flange relative to the reference flange based on the first and third readings;

[0026] By respectively installing gaskets on the bottom surfaces of the front support and the rear support and changing the thickness of the gaskets, the horizontal position deviation and the vertical position deviation of the mounting flange relative to the reference flange are repeatedly measured until the deviation is within the third range.

[0027] In one embodiment of the present invention, in step S4, after adjusting the horizontal position deviation and the vertical position deviation of the mounting flange relative to the reference flange to a third error range, the method further includes: connecting the mounting flange and the reference flange using a coupling.

[0028] In one embodiment of the present invention, in step S4, the method of adjusting the horizontal position deviation and the vertical position deviation between the first simulation disk and the second simulation disk to a fourth error range includes:

[0029] Detecting the detection position of the detection meter on the outer circle of the first simulation disk, and connecting the extension arm of the detection meter to the second simulation disk;

[0030] Rotate the flexible long rotor along its central axis, and record the first, second, third, and fourth readings of the test meter at rotation angles of 0°, 90°, 180°, and 270°, respectively;

[0031] Obtaining a horizontal position deviation of the second simulated disk relative to the first simulated disk based on the second reading and the fourth reading, and obtaining a vertical position deviation of the second simulated disk relative to the first simulated disk based on the first reading and the third reading;

[0032] By respectively installing shims on the bottom surfaces of the front support and the rear support and changing the thickness of the shims, the horizontal position deviation and the vertical position deviation of the second simulation disk relative to the first simulation disk are repeatedly measured until the deviation is within the third range.

[0033] In one embodiment of the present invention, the first error range, the second error range and the third error range are equal.

[0034] The above technical solution of the present invention has the following advantages over the prior art:

[0035] The flexible long rotor installation and centering method described in the present invention improves the accuracy and reliability of the flexible long rotor installation and centering, takes into account the deformation problem of the flexible long rotor in a horizontal state, provides the installation benchmark and measurement benchmark of the flexible long rotor, shortens the test research cycle of the flexible long rotor, and reduces the research and development cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0037] Figure 1 This is a schematic diagram of the height gauge provided by the present invention for measuring center height.

[0038] Figure 2 This is a schematic diagram of the measurement position provided by the present invention.

[0039] Figure 3 This is a schematic diagram of lifting the flexible long rotor provided by the present invention.

[0040] Figure 4 The present invention provides a schematic diagram of the connection between a suspended flexible long rotor and a front support and a rear support.

[0041] Figure 5 This is a schematic diagram of the alignment of the flexible long rotor and the reference flange provided by the present invention.

[0042] Figure 6 This is a schematic diagram of the alignment of the first simulation disk and the second simulation disk of the flexible long rotor provided by the present invention. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0044] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0045] In the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of the present invention, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0046] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0047] Reference Figure 1 As shown, a method for installing and centering a flexible long rotor according to the present invention comprises the following steps:

[0048] Step 1); Figure 1 As shown, a height gauge 110 is used to measure the center height H of the reference flange 100. 100 、Front support 120 center height H 120 、Rear support 130 center height H 130 , the measurement position is as follows Figure 2 The measurement results at the 0° and 180° positions are H 100,0° 、H 100,180° 、H 120,0° 、H 120,180° 、H 130,0° 、H 130,180° , according to H 100 =(H 100,0° +H 100,180° ) / 2、H 120 =(H 120,0° +H 120,180° ) / 2、H 130 =(H 130,0° +H 130,180° ) / 2 to calculate the center height; wherein the height gauge 110 includes a bracket 111 and a measuring arm 112. When measuring the height of the center hole of the rear support 130, a longer measuring arm 113 is required;

[0049] Step 2): Figure 1As shown, a copper sheet 121 is placed at the bottom of the front support 120 and a copper sheet 131 is placed at the bottom of the rear support 130. By repeatedly adjusting the thickness of the copper sheets 121 and 131, the center height H of the front support 120 is measured according to the method of step 1). 120 and rear support 130 center height H 130 , adjusted to (H 100 +δ,H 100 -δ) range, the center height of the front support 120 that finally meets the requirements is recorded as H' 120 The center height of the rear support 130 is denoted as H' 130 ;

[0050] Step 3): If Figure 3 As shown, a lifting device 150 is used to lift the flexible long rotor 140. The position where the lifting rope 151 is connected is the first journal 143 of the first simulated disk 142 and the second journal 147 of the second simulated disk 148. The lifting device 150 includes a lifting hook 152, a crossbeam 153 and two lifting ropes 151. The length of the crossbeam 153 is close to the distance between the first journal 143 and the second journal 147 to ensure that the lifting ropes 151 are vertically upward.

[0051] Step 4): Use the method of step 1) to measure the center height H of the front end portion 141 of the flexible long rotor 140 141 , the center height H of the first simulation disk 143 143 , Left boss 144 center height H 144 、Intermediate boss 145 center height H 145 , right boss 146 center height H 146 , the center height H of the second simulation disk 148 148 ;

[0052] Step 5): By adjusting the length of the hanging rope 151, the center height measured in step 4) is adjusted to (H' 120 +δ,H' 120 -δ) range, and then the flexible long rotor 140 passes through the front support 120, as shown Figure 4 As shown, the mounting flange 160 is fixed to the front end portion 141 of the flexible long rotor 140, and the lifting device 150 is still kept in its original position;

[0053] Step 6): Figure 4 As shown, the rear end 149 of the flexible long rotor 140 is connected to the rear support 130;

[0054] Step 7): Loosen the hook 152 and remove the rope 151. Figure 5As shown, a radial detection device 170 is provided on the mounting flange 160. The radial detection device 170 includes a detection gauge 171 and an extension arm 172. The extension arm 172 is fixed to the mounting flange 160 with bolts. The length of the extension arm 172 is not less than the distance between the mounting flange 160 and the reference flange 100. The detection gauge 171 is mounted on the extension arm 172. The detection position is on the outer circle of the reference flange 100. Figure 2 The flexible long rotor 140 is rotated to record the readings of the detection table 171 at the positions of 0°, 90°, 180° and 270° respectively. 160,0° ,ζ 160，90° ,ζ 160，180° ,ζ 160,270° , according to the formula ζ 160水平 =|ζ 160,90° -ζ 160,270° | / 2,ζ 160竖直 =|ζ 160,0° -ζ 160,180° | / 2, calculate the horizontal position deviation ζ of the mounting flange 160 relative to the reference flange 100 160水平 and vertical position deviation ζ 160竖直 , using the method in step 2), change the thickness of the copper sheet 121 at the bottom of the front support 120, and measure the horizontal position deviation ζ again after the change 160水平 and vertical position deviation ζ 160竖直 , until the deviation is within the range of (+δ, -δ), the coupling 180 is used to connect the mounting flange 160 and the reference flange 100, as shown in FIG. Figure 6 As shown, the front support 120 is fixed; the radial detection device 170 used can be a magnetic base with a micrometer, a laser detection device and other structures, which are installed on the mounting flange 160. As the rotor rotates one circle, the vertical position deviation and horizontal position deviation of the mounting flange 160 relative to the reference flange 100 can be measured.

[0055] Step 8): Figure 6 As shown, a radial detection device 190 is provided on the first simulation disk 142 and the second simulation disk 148 of the flexible long rotor 140. The radial detection device 190 includes a detection gauge 191 and an extension arm 192. The extension arm 192 is fixed to the second simulation disk 148 by bolts. The length of the extension arm 192 is not less than the distance between the first simulation disk 142 and the second simulation disk 148. The detection gauge 191 is mounted on the extension arm 192. The detection position is on the outer circle of the first simulation disk 142. Figure 2 The flexible long rotor 140 is rotated to record the readings of the detection table 191 at the positions of 0°, 90°, 180° and 270° respectively. 148,0° ,ζ 148，90° ,ζ 148，180° ,ζ 148,270°, according to the formula ζ 148水平 =|ζ 148,90° -ζ 148,270° | / 2,ζ 148竖直 =|ζ 148,0° -ζ 148,180° | / 2, calculate the horizontal position deviation ζ of the second simulation disk 148 relative to the first simulation disk 142 148水平 and vertical position deviation ζ 148竖直 , using the method in step 2), change the thickness of the copper sheet 131 at the bottom of the rear support 130, and measure the horizontal position deviation ζ again after the change 148水平 and vertical position deviation ζ 148竖直 , until the deviation is within the range of (+δ, -δ), and then the rear support 130 is fixed. The radial detection device 190 used above can be a structure such as a magnetic base with a dial indicator, a laser detection device, etc. When using a magnetic base with a dial indicator, a mechanical arm needs to be designed and fixed on the first simulation disk 142 or the second simulation disk 148. The magnetic base with the dial indicator is attracted to the mechanical arm to measure the vertical position deviation and horizontal position deviation of the relative first simulation disk 142 or the second simulation disk 148.

[0056] Step 9): According to step 4), re-measure and record the center height H' of the front end 141 of the flexible long rotor 140 141 , the center height H' of the first simulation disk 143 143 , the center height H' of the left boss 144 144 、Center height H' of middle boss 145 145 , right boss 146 center height H' 146 , the center height H' of the second simulation disk 148 148 The center height data is used as the rotor installation information in subsequent tests.

[0057] The flexible long rotor installation method provided by the present invention is accurate and reliable, takes into account the deformation problem of the flexible long rotor in a horizontal state, provides installation and measurement benchmarks for the flexible long rotor, shortens the test research cycle of the flexible long rotor, and reduces research and development costs.

[0058] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for installing and centering a flexible long rotor, characterized in that: The steps include: S1. Arrange a reference flange, a front support, and a rear support in sequence on a horizontal plane, and adjust the center heights of the center holes of the front support and the rear support so that the difference between the center heights of the reference flange and the center heights of the front support and the rear support is within a first error range; S2. Horizontally hoist the flexible long rotor, and adjust the center heights of the front end of the flexible long rotor, the first simulated plate, the left boss, the middle boss, the right boss, and the second simulated plate to within a second error range relative to the center height of the front support; S3, passing the front end of the flexible long rotor through the front support and connecting the front end to the mounting flange, and connecting the rear end of the flexible long rotor to the rear support; S4, releasing the hoisting, adjusting the horizontal position deviation and the vertical position deviation of the mounting flange relative to the reference flange to a third error range, and fixing the front support; S5. Adjust the horizontal position deviation and the vertical position deviation between the first simulation plate and the second simulation plate to a fourth error range, and fix the rear support; In step S4, the method of adjusting the horizontal position deviation and the vertical position deviation of the mounting flange relative to the reference flange to a third error range includes: Detect the detection position of the detection gauge on the outer circle of the reference flange, and connect the extension arm of the detection gauge to the mounting flange; Rotate the flexible long rotor along its central axis, and record the first, second, third, and fourth readings of the test meter at rotation angles of 0°, 90°, 180°, and 270°, respectively; Obtaining a horizontal position deviation of the mounting flange relative to the reference flange based on the second and fourth readings, and obtaining a vertical position deviation of the mounting flange relative to the reference flange based on the first and third readings; By respectively installing gaskets on the bottom surfaces of the front support and the rear support and changing the thickness of the gaskets, the horizontal position deviation and vertical position deviation of the mounting flange relative to the reference flange are repeatedly measured until the deviation is within the third error range.

2. A method for installing and centering a flexible long rotor according to claim 1, characterized in that: Step S1 includes: In the direction of gravity, use a height gauge to measure the heights of the highest and lowest points of the reference flange relative to the horizontal plane, the highest and lowest points of the center hole of the front support relative to the horizontal plane, and the highest and lowest points of the center hole of the rear support relative to the horizontal plane; Obtaining the center height of the reference flange according to the heights of the highest point and the lowest point of the reference flange relative to the horizontal plane; Obtaining the center height of the center hole of the front support according to the heights of the highest point and the lowest point of the center hole of the front support relative to the horizontal plane; The center height of the center hole of the rear support is obtained according to the heights of the highest point and the lowest point of the center hole of the rear support relative to the horizontal plane.

3. A method for installing and centering a flexible long rotor according to claim 2, characterized in that: The height gauge comprises a bracket and a measuring arm connected to the bracket.

4. A method for installing and centering a flexible long rotor according to claim 1, characterized in that: Step S1 includes: The center heights of the center holes of the front support and the rear support are adjusted by respectively arranging gaskets on the bottom surfaces of the front support and the rear support and changing the thickness of the gaskets.

5. The method for installing and centering a flexible long rotor according to claim 1, characterized in that: A support block placed on the horizontal plane is provided below the bottom end of each of the front support and the rear support, and a bolt is connected to the bottom end of each of the front support and the rear support and the upper end surface of the support block. A pad area for padding a gasket is formed between the bottom surface of each of the front support and the rear support and the upper end surface of the support block, the pad area is centered on the bolt, and the width of the circumferential area of ​​the bolt is not less than twice the diameter of the bolt.

6. A method for installing and centering a flexible long rotor according to claim 1, characterized in that: In step S2, the method for horizontally hoisting a long flexible rotor includes: A lifting rope is connected to the first shaft neck of the first simulation disk and the second shaft neck of the second simulation disk respectively, the two lifting ropes are connected to the crossbeam, and a lifting hook is set at the center of the crossbeam to connect to an external power source.

7. A method for installing and centering a flexible long rotor according to claim 1, characterized in that: In step S4, after adjusting the horizontal position deviation and the vertical position deviation of the mounting flange relative to the reference flange to a third error range, the method further includes: connecting the mounting flange and the reference flange using a coupling.

8. The method for installing and centering a flexible long rotor according to claim 1, characterized in that: In step S5, the method of adjusting the horizontal position deviation and the vertical position deviation between the first simulation disk and the second simulation disk to a fourth error range includes: Detecting the detection position of the detection meter on the outer circle of the first simulation disk, and connecting the extension arm of the detection meter to the second simulation disk; Rotate the flexible long rotor along its central axis, and record the first, second, third, and fourth readings of the test meter at rotation angles of 0°, 90°, 180°, and 270°, respectively; Obtaining a horizontal position deviation of the second simulated disk relative to the first simulated disk based on the second reading and the fourth reading, and obtaining a vertical position deviation of the second simulated disk relative to the first simulated disk based on the first reading and the third reading; By respectively installing gaskets on the bottom surfaces of the front support and the rear support and changing the thickness of the gaskets, the horizontal position deviation and vertical position deviation of the second simulation disk relative to the first simulation disk are repeatedly measured until the deviation is within the fourth error range.

9. The method for installing and centering a flexible long rotor according to claim 1, characterized in that: The first error range, the second error range and the third error range are equal.

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