A positioning tool for radial clearance measurement of a turning vane and a method of use

Abstract

The application belongs to the field of engine assembly detection, and specifically discloses a positioning tool for measuring the radial clearance of a rotatable blade and a use method, which comprises: an adapter plate, a connecting hole and two positioning pins; one end of the adapter plate is connected with the outer wall of an air inlet casing through the connecting hole, and the two positioning pins are respectively connected with the middle part of the adapter plate; the bottom ends of the two positioning pins are respectively in contact with the rear end face of the air inlet casing. The positioning tool is used to realize the angular positioning of the blade, thereby determining the radial position of the blade, completing the accurate measurement of the radial clearance of the rotatable blade when rotating to two limit angles, facilitating on-site detection, avoiding rework, greatly improving the assembly quality and efficiency of the rotatable blade, avoiding the problems of blade damage, casing scratch and deformation of the linkage ring caused by the counter torque generated by the blade in severe cases.

Description

Technical Field

[0001] The invention belongs to the field of engine assembly detection, and particularly relates to a positioning tool for measuring the radial clearance of a rotatable blade and a use method thereof. Background Art

[0002] At the assembly site, the rotatable blade assembly results in inaccurate measurement of the gap between the blade end face and the inner and outer walls of the casing due to inaccurate angular positioning of the single blade during initial installation. This results in unqualified gaps when remeasured after the linkage ring is installed, requiring frequent rework. In some cases, the blade end face may interfere with the inner wall of the casing or the outer wall of the inner ring, causing damage to the blade and scratches on the casing. In severe cases, the back torque generated by the blade causes deformation of the linkage ring. The measurement of this gap seriously affects the progress and quality of engine assembly. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a positioning tool for measuring the radial clearance of rotatable blades and a method of use, so as to solve the problem of inaccurate measurement of the clearance between the blade end face and the inner and outer walls of the casing during blade assembly, resulting in blade damage and casing scratches.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] In one aspect, the present invention provides a positioning tool for measuring radial clearance of a rotatable blade, comprising:

[0006] An adapter plate and two locating pins; a connecting hole is provided at one end of the adapter plate; one end of the adapter plate is connected to the outer wall of the air intake casing through the connecting hole, and the two locating pins are respectively connected to the middle part of the adapter plate; the bottom ends of the two locating pins are respectively in contact with the rear end surface of the air intake casing.

[0007] Furthermore, the adapter plate includes a first connecting member, a second connecting member and a free end; the first connecting member is composed of a cylinder and a cuboid, the cylinder is provided with a connecting hole, and the bolt is connected to the outer wall of the air intake casing through the connecting hole.

[0008] Furthermore, the second connecting member and the free end are both cuboids, the width of the second connecting member is greater than the width of the first connecting member and the free end, and the width of the first connecting member is the same as the width of the free end.

[0009] Furthermore, the second connecting member is provided with two positioning pin holes, and the two positioning pins are connected to the adapter plate through the corresponding positioning pin holes; one positioning pin hole is marked with "0", and the other positioning pin hole is marked with "-45".

[0010] Furthermore, it also includes a gasket, which is connected between the bolt and the connecting plate.

[0011] Furthermore, the bolt is a hexagonal head bolt, and the connecting hole is a waist-shaped hole.

[0012] Furthermore, the adapter plate has a Z-shaped structure, and the angle between the first connecting member and the free end is an acute angle.

[0013] Furthermore, a journal is provided on the outer wall of the air intake casing, and one end of the adapter plate is connected to the journal passing through the outer wall of the air intake casing through a connecting hole.

[0014] In another aspect, the present invention provides a method for using a positioning tool for measuring radial clearance of a rotatable blade, comprising:

[0015] The connecting hole on the adapter plate is connected to the shaft neck passing through the outer wall of the air intake casing. Two locating pin holes are designed in the middle part of the adapter plate. The position of the locating pin holes is determined based on the principle that when the blade rotates to two extreme positions, the locating pins passing through the locating pin holes are tangent to the mounting edge of the casing respectively; when measuring, insert the locating pins into the corresponding locating pin holes, rotate the adapter plate, and when the locating pin contacts the rear end face of the air intake casing, its rotation angle is the angular position of the blade during the gap measurement, and then tighten the bolts to achieve radial limitation of the blade tip.

[0016] Furthermore, it also includes:

[0017] Rotate the adapter plate toward the side marked with "0". At this time, the angle between the adapter plate and the axis is 20°. When the locating pin contacts the rear end surface of the intake casing, the angle positioning is achieved. Tighten the bolt again. At this time, it reaches the first limit position. Measure the distance X1 between the blade and the inner wall of the intake casing, and measure the clearance value X2 between the blade and the outer wall of the intake casing.

[0018] The adapter plate rotates toward the side marked with "-45". At this time, the angle between the adapter plate and the engine axis is -25°. When the locating pin contacts the rear end face of the air intake casing, the angle positioning is achieved. Then tighten the bolts. At this time, it reaches the second extreme position. Measure the distance X1 between the blade and the inner wall of the air intake casing, and measure the gap value X2 between the blade and the outer wall of the air intake casing.

[0019] The present invention has at least the following beneficial effects:

[0020] 1. The present invention uses the positioning tool to achieve angular positioning of the blade, thereby determining the radial position of the blade and completing the accurate measurement of the radial clearance of the rotatable blade when it is rotated to two extreme angles, facilitating on-site inspection and avoiding rework, greatly improving the assembly quality and efficiency of the rotatable blade, and avoiding blade damage, casing scratches, and in severe cases, the problem of deformation of the linkage ring caused by the reverse torque generated by the blade.

[0021] 2. The present invention solves the problem of angular and radial measurement and positioning of a single blade during initial installation of a rotatable blade, and can be widely applied to the assembly and measurement of rotatable blades in engine intake casings and compressors. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] In the attached figure:

[0024] Figure 1 It is a schematic diagram of the top view of the adapter plate;

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the adapter plate;

[0026] Figure 3 Schematic diagram of the positioning pin structure;

[0027] Figure 4 This is a schematic diagram of the positioning tooling application;

[0028] Figure 5 This is a schematic diagram of the air intake casing structure.

[0029] Figure numerals: 1. adapter plate; 11. first connecting member; 12. second connecting member; 13. free end; 2. positioning pin hole; 3. connecting hole; 4. positioning pin; 5. bolt; 6. gasket; 7. rear end face of the air intake casing; 8. journal; 9. outer wall of the air intake casing; 10. inner wall of the air intake casing; 11. blade. DETAILED DESCRIPTION

[0030] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0031] The following detailed description is an exemplary description and is intended to provide further detailed description of the present invention. Unless otherwise indicated, all technical terms used in the present invention have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. The terms used in the present invention are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention.

[0032] Example 1

[0033] like Figure 1-3 As shown in the figure, a positioning tool for measuring the radial clearance of a rotatable blade according to the present invention comprises:

[0034] Adapter plate 1, connecting hole 3 and two locating pins 4; one end of the adapter plate 1 is connected to the outer wall 9 of the air intake casing through the connecting hole 3, and the bottom ends of the two locating pins 4 are respectively connected to the middle part of the adapter plate 1.

[0035] The adapter plate 1 includes a first connecting member 11, a second connecting member 12 and a free end 13; the first connecting member 11 is composed of a cylinder and a rectangular parallelepiped, the height of the cylinder is greater than the height of the rectangular parallelepiped, and a connecting hole 3 is provided on the cylinder, and the bolt 5 is connected to the outer wall 9 of the air intake casing through the connecting hole 3; the bolt 5 is a hexagonal head bolt, and the connecting hole 3 is a waist-shaped hole.

[0036] The connecting plate 1 further comprises a gasket 6 , which is connected between the bolt 5 and the connecting plate 1 .

[0037] The second connecting member 12 and the free end 13 are both rectangular parallelepipeds. The width of the second connecting member 12 is greater than the width of the first connecting member 11 and the free end 13. The width of the first connecting member 11 is the same as the width of the free end 13. Two positioning pin holes 2 are provided on the second connecting member 12, and the two positioning pins 4 are respectively connected to the adapter plate 1 through the corresponding positioning pin holes 2.

[0038] The adapter plate 1 has a Z-shaped structure, the first connecting member 11 and the free end 13 are not parallel, and the angle between the first connecting member 11 and the free end 13 is an acute angle.

[0039] A journal 8 is provided on the outer wall 9 of the air intake casing, and one end of the adapter plate 1 is connected to the journal 8 passing through the outer wall 9 of the air intake casing through a connecting hole 3; two locating pins 4 pass through corresponding locating pin holes 2 and are tangent to different parts of the rear end face 7 of the air intake casing.

[0040] Example 2

[0041] like Figure 4-5 As shown, the present invention provides a method for using a positioning tool for measuring radial clearance of a rotatable blade, comprising:

[0042] The connection hole 3 on the adapter plate 1 is connected to the journal 8 that passes through the outer wall of the intake casing 9, driving the rotation of the blade 11. Two locating pin holes 2 are designed in the middle of the adapter plate 1. The position of the locating pin holes 2 is determined based on the principle that when the blade 11 rotates to the two extreme positions, the locating pins 4 passing through the locating pin holes 2 are tangent to the casing mounting edge. During measurement, the locating pins 4 are inserted into the corresponding locating pin holes 2, and the adapter plate 1 is rotated. When the locating pins 4 contact the rear end face 7 of the intake casing, the rotation angle is the angular position of the blade 11 during the clearance measurement. The bolts 5 are then tightened to achieve radial positioning of the blade 11 tip.

[0043] One positioning pin hole 2 is marked with "0", and the other positioning pin hole 2 is marked with "-45";

[0044] Adapter plate 1 rotates toward the side marked with "0." The angle between adapter plate 1 and the axis is now 20°. When locating pin 4 contacts intake casing rear end face 7, angular positioning is achieved. Bolt 5 is then tightened until the first limit position is reached. Measure the distance X1 between blade 11 and intake casing inner wall 10, and the clearance X2 between blade 11 and intake casing outer wall 9.

[0045] Rotate adapter plate 1 toward the "-45" marking. The angle between adapter plate 1 and the axis is now -25°. When locating pin 4 contacts intake casing rear end face 7, angular positioning is achieved. Tighten bolt 5 again until the second limit position is reached. Measure the distance X1 between blade 11 and intake casing inner wall 10, and the clearance X2 between blade 11 and intake casing outer wall 9.

[0046] All blades 11 of the air intake casing are measured one by one to prevent damage to the blades 11 and scratches on the casing during subsequent use. In severe cases, the counter-torque generated by the blades 11 may cause deformation of the linkage ring.

[0047] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A positioning tool for measuring radial clearance of rotatable blades, characterized in that: include: An adapter plate (1) and two locating pins (4); one end of the adapter plate (1) is provided with a connecting hole (3); one end of the adapter plate (1) is connected to the outer wall (9) of the air intake casing through the connecting hole (3), and the two locating pins (4) are respectively connected to the middle part of the adapter plate (1); the bottom ends of the two locating pins (4) are respectively in contact with the rear end surface (7) of the air intake casing; the adapter plate (1) includes a first connecting member (11), a second connecting member (12) and a free end (13); the first connecting member (11) is composed of a cylinder and a rectangular parallelepiped, the cylinder is provided with a connecting hole (3), and the bolt (5) is connected to the outer wall (9) of the air intake casing through the connecting hole (3); the second connecting member (12) is provided with two locating pin holes (2), and the two locating pins (4) are respectively connected to the adapter plate (1) through the corresponding locating pin holes (2); one locating pin hole (2) is marked with "0" and the other locating pin hole (2) is marked with "-45".

2. A positioning tool for measuring radial clearance of rotatable blades according to claim 1, characterized in that: The second connecting member (12) and the free end (13) are both cuboids, the width of the second connecting member (12) is greater than the width of the first connecting member (11) and the free end (13), and the width of the first connecting member (11) is the same as the width of the free end (13).

3. The positioning tool for measuring the radial clearance of a rotatable blade according to claim 1, characterized in that: It also includes a gasket (6) connected between the bolt (5) and the adapter plate (1).

4. A positioning tool for measuring radial clearance of rotatable blades according to claim 1, characterized in that: The bolt (5) is a hexagonal head bolt, and the connecting hole (3) is a waist-shaped hole.

5. The positioning tool for measuring radial clearance of rotatable blades according to claim 1, characterized in that: The adapter plate (1) has a Z-shaped structure, and the angle between the first connecting member (11) and the free end (13) is an acute angle.

6. The positioning tool for measuring radial clearance of rotatable blades according to claim 1, characterized in that: A journal (8) is provided on the outer wall (9) of the air intake casing, and one end of the adapter plate (1) is connected to the journal (8) passing through the outer wall (9) of the air intake casing via a connecting hole (3).

7. A method for using a positioning tool for measuring radial clearance of a rotatable blade, characterized in that: include: The connecting hole (3) on the adapter plate (1) is connected to the shaft neck (8) passing through the outer wall of the air intake casing (9), and two positioning pin holes (2) are designed in the middle part of the adapter plate (1). The position of the positioning pin hole (2) is determined based on the principle that when the blade (11) rotates to two extreme positions, the positioning pin (4) passing through the positioning pin hole (2) is tangent to the casing mounting edge respectively; when measuring, the positioning pin (4) is inserted into the corresponding positioning pin hole (2), and the adapter plate (1) is rotated. When the positioning pin (4) contacts the rear end face (7) of the air intake casing, its rotation angle is the angular position of the blade (11) during the gap measurement, and then the bolt (5) is tightened to achieve radial limitation of the blade tip (11).

8. The method for using the positioning tool for measuring the radial clearance of a rotatable blade according to claim 7, characterized in that: Also includes: The adapter plate (1) is rotated toward the side marked with "0". At this time, the angle between the adapter plate (1) and the axis is 20°. When the positioning pin (4) contacts the rear end face (7) of the air intake casing, the angle positioning is achieved. Then, the bolt (5) is tightened. At this time, the first limit position is reached. The distance X1 between the blade (11) and the inner wall (10) of the air intake casing is measured. The clearance value X2 between the blade (11) and the outer wall (9) of the air intake casing is measured. The adapter plate (1) is rotated toward the side marked "-45". At this time, the angle between the adapter plate (1) and the engine axis is -25°. When the positioning pin (4) contacts the rear end face (7) of the air intake casing, the angle positioning is achieved. Then, the bolt (5) is tightened. At this time, the second limit position is reached. The distance X1 between the blade (11) and the inner wall (10) of the air intake casing is measured. The clearance value X2 between the blade (11) and the outer wall (9) of the air intake casing is measured.

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