Circumferential angle position positioning tool for turbine journal

Abstract

The utility model relates to the technical field of rotor balance, and discloses a circumferential angle position positioning tool for a turbine journal, which comprises a first tool body, a second tool body, a locking piece and a fixing rod, a plurality of first angle scales are arranged on the first tool body along the circumferential direction, and a first positioning hole is arranged on the first tool body along the radial direction; a plurality of second angle scales are arranged on the second tool body in the circumferential direction, and a second positioning hole is formed in the second tool body in the radial direction; the second tool body and the first tool body are in butt joint to form an annular body, the multiple first angle scales and the multiple second angle scales are sequentially arranged in the circumferential direction of the annular body, and the hole center axis of the first positioning hole and the hole center axis of the second positioning hole are collinear. The locking piece is used for locking the first tool body and the second tool body; the positioning rod is used for being inserted into the first positioning hole, a reserved hole in the turbine shaft neck and the second positioning hole. According to the utility model, the circumferential angle position on the turbine journal can be accurately positioned, and the positioning error of the circumferential angle position is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of rotor balancing, in particular to a circumferential angle position positioning tool for a turbine journal. Background Art

[0002] The APS5000A APU (Auxiliary Power Unit) is an auxiliary power unit installed on the Boeing 787 aircraft. It only generates electricity and has a relatively large electrical load. Due to the large size of the Boeing 787 aircraft and the characteristics of meeting the large electrical load, the rotor of the APS5000A is also the largest among all APU models. Such a rotor with large mass, large volume and also bears a large electrical load pressure, its balance distribution plays a vital role in the stability of the entire APU.

[0003] During the overall balancing process of the APS5000A rotor, the worker needs to rotate the end teeth between the first-stage turbine and the impeller to change the installation angle between the rotors, reduce the imbalance of the rotor system to the minimum, and then select a set of optimal data from the five sets of readings given by the balancing machine, and derive the counterweights to be installed, the installation method and the specific position based on the selected data, and finally rivet the counterweights at the specified position to eliminate the remaining imbalance. However, even if the balancing machine gives the angle at which the counterweights need to be added, the worker cannot accurately find the position corresponding to the angle on the first-stage turbine. At present, this position can only be roughly found by manual visual observation. The error of the angle position is large, which will lead to large errors in the selection and arrangement of the counterweight blocks, affecting the elimination effect of the imbalance. If you want to reselect and reinstall the counterweights, you can only remove and scrap the counterweight blocks and pins that have been riveted, which will cause serious waste of cost, time and manpower. Utility Model Content

[0004] The utility model aims to provide a circumferential angle position positioning tool for a turbine journal, so as to accurately position the circumferential angle position on the turbine journal, thereby facilitating the selection and installation of a suitable counterweight block and eliminating the unbalance.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The circumferential angle position positioning tool of the turbine journal of the utility model comprises:

[0007] A first tooling body, wherein a plurality of first angle scales are provided on the first tooling body in a circumferential direction, and a first positioning hole is opened on the first tooling body in a radial direction;

[0008] A second tooling body, wherein a plurality of second angle scales are arranged on the second tooling body along the circumferential direction, and a second positioning hole is opened on the second tooling body along the radial direction; the second tooling body and the first tooling body are connected to each other to form an annular body, so that the plurality of first angle scales and the plurality of second angle scales are arranged in sequence along the circumferential direction of the annular body, and the hole center axis of the first positioning hole is collinear with the hole center axis of the second positioning hole;

[0009] A locking member, used to lock the first tool body and the second tool body;

[0010] The positioning rod is used to be inserted into the first positioning hole, the reserved hole on the turbine journal and the second positioning hole.

[0011] Preferably, the first tool body and the second tool body are both semi-annular.

[0012] Preferably, the first positioning hole is opened in the middle of the first tool body, and the second positioning hole is opened in the middle of the second tool body.

[0013] Preferably, the first tooling body has a first surface and a second surface opposite to each other, and the vertical distance between the center of the first positioning hole and the first surface is equal to the vertical distance between the center of the first positioning hole and the second surface; the second tooling body has a third surface and a fourth surface opposite to each other, and the vertical distance between the center of the second positioning hole and the third surface is equal to the vertical distance between the center of the second positioning hole and the fourth surface.

[0014] Preferably, both the first surface and the second surface have the first angle scale, and the distribution of the first angle scale on the first surface and the second surface is the same; both the third surface and the fourth surface have the second angle scale, and the distribution of the second angle scale on the third surface and the fourth surface is the same.

[0015] Preferably, the multiple first angle scales respectively indicate 90° to 270°, and the multiple second angle scales respectively indicate 0° to 90°, and 270° to 360°; the first angle scale parallel to the center axis of the first positioning hole indicates 180°, and the second angle scale parallel to the center axis of the second positioning hole indicates 0° and 360°, and the first angle scale and the second angle scale at the joint between the first tooling body and the second tooling body coincide, and both indicate 90° or 270°.

[0016] Preferably, a first fixing block is provided at both ends of the first tooling body, and a second fixing block is provided at both ends of the second tooling body. The first tooling body and the second tooling body are butt-jointed with each other so that the first fixing block fits with the corresponding second fixing block; the locking piece is used to lock the first fixing block with the corresponding second fixing block.

[0017] Preferably, one of the first fixing block and the corresponding second fixing block is provided with a threaded hole, and the other of the first fixing block and the corresponding second fixing block is provided with a through hole, and the locking member passes through the through hole and is assembled in the threaded hole.

[0018] Preferably, two ends of the positioning rod extend out of the first positioning hole and the second positioning hole respectively.

[0019] Preferably, the diameter of the first positioning hole and the diameter of the second positioning hole are both 1.65 mm, and the diameter of the positioning rod is 1.6 mm.

[0020] Compared with the prior art, the circumferential angle position positioning tool of the turbine journal in the embodiment of the utility model has the following beneficial effects:

[0021] The circumferential angular position positioning tool of the turbine journal of the embodiment of the utility model comprises a first tool body, a second tool body, a locking piece and a positioning piece. A first angle scale and a first positioning hole are set on the first tool body, and a second angle scale and a second positioning hole are set on the second tool body. The first tool body and the second tool body can be docked to form an annular body and can be locked and fixed by the locking piece. The first tool body and the second tool body are docked to form an annular body, so that the annular body is sleeved on the outer peripheral side of the turbine journal, and the positioning rod is passed through the first positioning hole, the reserved hole of the turbine journal and the second positioning hole, so that the annular body is firmly fixed to the turbine journal, and the stability of the first tool body and the second tool body on the outer peripheral side of the turbine journal is ensured. The first angle scale and the second angle scale can intuitively reflect the circumferential angular position of the turbine shaft neck, so that the circumferential angular position on the turbine shaft neck can be accurately located through the positioning tool of the utility model, reducing the positioning error of the circumferential angular position, thereby facilitating the selection and installation of a suitable counterweight block according to the determined circumferential angular position on the turbine shaft neck, improving the effect of eliminating the imbalance, avoiding rework such as reinstalling the counterweight block, and avoiding cost waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the turbine;

[0023] Figure 2 It is a structural schematic diagram of the circumferential angle position positioning tool of the turbine journal according to the embodiment of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the first tooling body in the embodiment of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the second tooling body in the embodiment of the utility model;

[0026] Figure 5 It is a schematic diagram of the first angle scale and the second angle scale in an embodiment of the utility model.

[0027] Numbers in the figure:

[0028] 1. First tool body; 101. First surface; 102. Second surface; 11. First angle scale; 12. First positioning hole; 2. Second tool body; 201. Third surface; 202. Fourth surface; 21. Second angle scale; 22. Second positioning hole; 3. Locking piece; 4. Positioning rod; 5. First fixing block; 6. Second fixing block; 7. Turbine journal; 71. Reserved hole. DETAILED DESCRIPTION

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] See also Figure 2-Figure 5As shown, an embodiment of the utility model provides a circumferential angular position positioning tool for a turbine journal, comprising a first tool body 1, a second tool body 2, a locking piece 3 and a fixing rod, wherein the first tool body 1 is provided with a plurality of first angle scales 11 along the circumferential direction, and the first tool body 1 is provided with a first positioning hole 12 along the radial direction; the second tool body 2 is provided with a plurality of second angle scales 21 along the circumferential direction, and the second tool body 2 is provided with a second positioning hole 22 along the radial direction; the second tool body 2 and the first tool body 1 are butted against each other to form an annular body, so that the plurality of first angle scales 11 and the plurality of second angle scales 21 are arranged in sequence along the circumference of the annular body, and the hole center axis of the first positioning hole 12 is colinear with the hole center axis of the second positioning hole 22; the locking piece 3 is used to lock the first tool body 1 and the second tool body 2; the positioning rod 4 is used to be inserted into the first positioning hole 12, the reserved hole 71 on the turbine journal 7 and the second positioning hole 22.

[0033] The first tooling body 1 and the second tooling body 2 are butted together to form an annular body, so that the annular body is sleeved on the outer peripheral side of the turbine journal 7, and the positioning rod 4 passes through the first positioning hole 12, the reserved hole 71 of the turbine journal 7, and the second positioning hole 22, so that the annular body and the turbine journal 7 are firmly fixed, ensuring the stability of the first tooling body 1 and the second tooling body 2 on the outer peripheral side of the turbine journal 7. The circumferential angular position of the turbine journal 7 can be intuitively reflected by the first angle scale 11 and the second angle scale 21, so that the circumferential angular position on the turbine journal 7 can be accurately located by the positioning tool of the utility model, reducing the positioning error of the circumferential angular position.

[0034] There are 10 equally spaced, equally sized, and evenly distributed small holes on the first-stage turbine journal of APS5000A. These are reserved holes 71 for inserting pins when installing counterweights later. It is necessary to find the angle position given by the balancing machine on this journal. The circumferential angle position given by the balancing machine is divided into the reserved hole 71 of the turbine journal 7 and not on the reserved hole 71 (except for the case where it falls on the reserved hole 71, the rest of the positions are considered not on the reserved hole 71). The counterweights selected for these two cases and the number of holes between the counterweights (0, 1, or 2 holes) are different. Once an error occurs in finding the circumferential angle position, it will affect the judgment and cause errors in the way the counterweight is installed. Therefore, accurately locating the circumferential angle position on the turbine journal 7 facilitates the selection and installation of a suitable counterweight, improves the effect of eliminating the imbalance, and avoids rework such as reinstalling the counterweight, thereby avoiding cost waste. The split structure consisting of the first tool body 1 and the second tool body 2 facilitates the positioning and installation of the positioning rod 4, thereby facilitating the installation and fixation of the positioning tool as a whole on the turbine journal 7.

[0035] See also Figure 2The positioning rod 4 is inserted into the first positioning hole 12, the reserved hole 71 on the turbine journal 7, and the second positioning hole 22, and the positioning tool is fixed to the turbine journal 7, ensuring the stability of the positioning tool on the outer peripheral side of the turbine journal 7, and avoiding the positioning tool having a movable gap as a whole, which leads to an error in the determined circumferential angle position. In some embodiments, the two ends of the positioning rod 4 extend out of the first positioning hole 12 and the second positioning hole 22, respectively, and the length of the positioning rod 4 is 140 mm.

[0036] See also Figure 5 As shown, in some embodiments, a plurality of first angle scales 11 are evenly spaced along the circumference of the first tooling body 1, and a plurality of second angle scales 21 are evenly spaced along the circumference of the second tooling body 2. When the first tooling body 1 and the second tooling body 2 are docked into an annular body, the plurality of first angle scales 11 and the plurality of second angle scales 21 indicate the circumferential angular position of the annular body. When the annular body is sleeved on the turbine journal 7, the circumferential angular position of the turbine journal 7 can be indicated by the first angle scale 11 and the second angle scale.

[0037] It should be noted that the angle scales formed by the plurality of first angle scales 11 and the plurality of second angle scales 21 are arranged in order of size along the circumferential direction.

[0038] See also Figure 2-Figure 5 As shown, in some embodiments, the first tooling body 1 and the second tooling body 2 are both semi-annular. The first tooling body 1 and the second tooling body 2 have the same structure. The first tooling body 1 and the second tooling body 2 are connected to form an annular body in a symmetrical manner. The annular body is a symmetrical structure. When in use, there is no need to consider the left and right positions of the first tooling body 1 and the second tooling body 2. The first positioning hole 12 is opened in the middle of the first tooling body 1, and the second positioning hole 22 is opened in the middle of the second tooling body 2. After the first tooling body 1 and the second tooling body 2 are connected to form an annular body, the hole center axis of the first positioning hole 12 and the hole center axis of the second positioning hole 22 are collinear, and the hole center axis of the first positioning hole 12 and the hole center axis of the second positioning hole 22 are located on a straight line perpendicular to the second tooling body 2 and the second tooling body 2 The docking surface, so that the positioning rod 4 is perpendicular to the docking surface of the first tooling body 1 and the second tooling body 2.

[0039] The thickness of the first tool body 1 and the second tool body 2 are equal. The thickness of the first tool body 1 and the second tool body 2 are designed according to the distance from the reserved hole 71 on the turbine journal 7 to the position where the diameter of the upper journal changes multiplied by two. Figure 3 and Figure 4As shown, in some embodiments, the first tool body 1 has a first surface 101 and a second surface 102 facing each other, and the vertical distance between the center of the first positioning hole 12 and the first surface 101 and the vertical distance between the center of the second positioning hole 22 and the third surface 201 and the vertical distance between the center of the second positioning hole 22 and the fourth surface 202 is equal. The first surface 101 and the second surface 102 both have a first angle scale 11, and the distribution of the first angle scale 11 on the first surface 101 and the second surface 102 is the same; the third surface 201 and the fourth surface 202 both have a second angle scale 21, and the distribution of the second angle scale 21 on the third surface 201 and the fourth surface 202 is the same, so that when using the positioning tool, there is no need to consider the front and back sides of the positioning tool, which is more convenient to use.

[0040] See also Figure 5 As shown, in some embodiments, a plurality of first angle scales 11 indicate 90° to 270° respectively, and a plurality of second angle scales 21 indicate 0° to 90°, and 270° to 360° respectively; the first angle scale 11 parallel to the center axis of the first positioning hole 12 indicates 180°, and the second angle scale 21 parallel to the center axis of the second positioning hole 22 indicates 0° and 360°, and the first angle scale 11 and the second angle scale 21 at the joint of the first tooling body 1 and the second tooling body 2 overlap, both indicating 90° or 270°. There are generally 10 reserved holes 71 on the turbine journal 7, and the 10 reserved holes 71 on the turbine journal 7 are numbered from hole No. 1 to hole No. 10, and hole No. 1 is generally used as 0 degree. Therefore, the second angle scale 21 indicating 0° and 360° is set at a position parallel to the center axis of the second positioning hole 22. Align the 0 scale line on the positioning tool with the No. 1 hole; insert the positioning rod 4 into the first positioning hole 12 and penetrate the turbine journal 7 for positioning; then fix the locking piece 3, and then the scales on the positioning tool can be intuitively matched with the circumferential position of the turbine journal 7.

[0041] See also Figure 2-Figure 4As shown, in some embodiments, both ends of the first tooling body 1 are provided with a first fixing block 5, and both ends of the second tooling body 2 are provided with a second fixing block 6. The first tooling body 1 and the second tooling body 2 are butted against each other so that the first fixing block 5 fits with the corresponding second fixing block 6; the locking member 3 is used to lock the first fixing block 5 and the corresponding second fixing block 6. By setting the first fixing block 5 and the second fixing block 6, a position is reserved for the installation of the locking member 3, so that the first tooling body 1 and the second tooling body 2 can be locked and fixed with the locking member 3. One of the first fixing block 5 and the corresponding second fixing block 6 is provided with a threaded hole, and the other of the first fixing block 5 and the corresponding second fixing block 6 is provided with a through hole, and the locking member 3 is assembled in the threaded hole through the through hole, wherein the first fixing block 5 and the corresponding second fixing block 6 are the first fixing block 5 and the second fixing block 6 that fit each other, and then the two ends of the first tooling body 1 and the second tooling body 2 are locked and fixed respectively. The locking member 3 is a bolt, which facilitates the locking and fixing of the locking member 3 on the first fixing block 5 and the second fixing block 6.

[0042] In order to make the positioning rod 4 pass through the first positioning hole 12, the reserved hole 71 and the second positioning hole 22 to stabilize the positioning tool as a whole on the outer peripheral side of the turbine journal 7, the aperture of the first positioning hole 12 and the aperture of the second positioning hole 22 are equal to the aperture of the reserved hole 71 on the turbine journal 7, so as to avoid the positioning rod 4 having a movable gap in the first positioning hole 12 and the second positioning hole 22, which causes the positioning tool body to move in the circumferential direction, resulting in errors in the positioning of the circumferential angle position. The diameter of the positioning rod 4 is slightly smaller than the aperture of the first positioning hole 12, the reserved hole 71 and the second positioning hole 22, so that the positioning rod 4 just passes through the reserved hole 71 of the turbine journal 7 without any movable gap, so as to ensure the accuracy of positioning. In some embodiments, the aperture of the first positioning hole 12 and the aperture of the second positioning hole 22 are both 1.65 mm, and the diameter of the positioning rod 4 is 1.6 mm.

[0043] In some embodiments, the first tool body 1 and the second tool body 2 are both made of stainless steel, and the portion thereof in contact with the turbine journal 7 is made of a material with a lower hardness than the turbine journal 7, which can effectively protect the turbine from damage.

[0044] The working process of the utility model is:

[0045] The first tooling body 1 and the second tooling body 2 are docked on the outer circumference of the turbine journal 7, and the scale lines of the second angle scale 21 indicating 0° and 360° are aligned with the No. 1 hole on the turbine journal 7. The positioning rod 4 is inserted into the first positioning hole 12 and penetrates the turbine journal 7 for positioning, and then the locking piece 3 is fixed to lock and fix the first tooling body 1 and the second tooling body 2, and the corresponding circumferential angle position on the turbine journal 7 is determined by the first angle scale 11 and the second angle scale 21.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A circumferential angle positioning tool for a turbine journal, characterized in that: include: A first tooling body, wherein a plurality of first angle scales are provided on the first tooling body in a circumferential direction, and a first positioning hole is opened on the first tooling body in a radial direction; A second tooling body, wherein a plurality of second angle scales are arranged on the second tooling body along the circumferential direction, and a second positioning hole is opened on the second tooling body along the radial direction; the second tooling body and the first tooling body are connected to each other to form an annular body, so that the plurality of first angle scales and the plurality of second angle scales are arranged in sequence along the circumferential direction of the annular body, and the hole center axis of the first positioning hole is collinear with the hole center axis of the second positioning hole; A locking member, used to lock the first tool body and the second tool body; The positioning rod is used to be inserted into the first positioning hole, the reserved hole on the turbine journal and the second positioning hole.

2. The circumferential angular position positioning tool for the turbine journal according to claim 1, characterized in that: The first tool body and the second tool body are both semi-annular.

3. The circumferential angular position positioning tool for a turbine journal according to claim 1 or 2, characterized in that: The first positioning hole is opened in the middle of the first tool body, and the second positioning hole is opened in the middle of the second tool body.

4. The circumferential angular position positioning tool for a turbine journal according to claim 1 or 2, characterized in that: The first tooling body has a first surface and a second surface opposite to each other, and the vertical distance between the center of the first positioning hole and the first surface is equal to the vertical distance between the center of the first positioning hole and the second surface; the second tooling body has a third surface and a fourth surface opposite to each other, and the vertical distance between the center of the second positioning hole and the third surface is equal to the vertical distance between the center of the second positioning hole and the fourth surface.

5. The circumferential angular position positioning tool for the turbine journal according to claim 4, characterized in that: Both the first surface and the second surface have the first angle scale, and the distribution of the first angle scale on the first surface and the second surface is the same; both the third surface and the fourth surface have the second angle scale, and the distribution of the second angle scale on the third surface and the fourth surface is the same.

6. The circumferential angular position positioning tool for a turbine journal according to claim 2, characterized in that: The multiple first angle scales respectively indicate 90° to 270°, and the multiple second angle scales respectively indicate 0° to 90°, and 270° to 360°; the first angle scale parallel to the center axis of the first positioning hole indicates 180°, and the second angle scale parallel to the center axis of the second positioning hole indicates 0° and 360°, and the first angle scale and the second angle scale at the joint between the first tooling body and the second tooling body coincide, and both indicate 90° or 270°.

7. The circumferential angular position positioning tool for a turbine journal according to claim 1, characterized in that: Both ends of the first tooling body are provided with a first fixing block, and both ends of the second tooling body are provided with a second fixing block. The first tooling body and the second tooling body are butted against each other so that the first fixing block fits with the corresponding second fixing block; the locking piece is used to lock the first fixing block with the corresponding second fixing block.

8. The circumferential angular position positioning tool for a turbine journal according to claim 7, characterized in that: One of the first fixing block and the corresponding second fixing block is provided with a threaded hole, and the other of the first fixing block and the corresponding second fixing block is provided with a through hole, and the locking member passes through the through hole and is assembled in the threaded hole.

9. The circumferential angular position positioning tool for a turbine journal according to claim 1, characterized in that: Two ends of the positioning rod extend out of the first positioning hole and the second positioning hole respectively.

10. The circumferential angular position positioning tool for a turbine journal according to claim 1, characterized in that: The diameter of the first positioning hole and the diameter of the second positioning hole are both 1.65 mm, and the diameter of the positioning rod is 1.6 mm.

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