Test tool for spline torque transmission wheel disc

Abstract

The invention discloses a test tool for a spline torque transmission wheel disc, and relates to the technical field of aero-engine wheel disc strength and service life test, and the test tool comprises a connecting shaft which is provided with an embedded groove, one end of a pull rod is inserted into the embedded groove and is matched with a threaded section in the embedded groove, and the other end of the pull rod is connected with a pressing part; the pressing piece is provided with a first annular flange extending outwards in the radial direction, and the pressing piece is further provided with a first circumferential positioning structure. And the stop ring is provided with a first matching part matched with the first circumferential positioning structure, the periphery of the stop ring is provided with a second matching part, and the second matching part is used for being matched with a second circumferential positioning structure on the spline torque transmission wheel disc. Visual judgment can be realized, and the problem of in-place verification of pre-tightening force application is solved; and meanwhile, circumferential and axial limiting structures are provided, so that the wheel disc is safer and more reliable to operate in a high-rotating-speed test.

Description

Technical Field

[0001] The present invention relates to the technical field of aero-engine disk strength and life test, and particularly relates to a test tooling for a spline torque transmission disk. Background Art

[0002] According to the regulations of the "General Specification for Aero-Turboprop and Turboshaft Engines", before the performance appraisal of the engine, it is necessary to complete the specified test items such as the disk overspeed, rupture and other strength tests and the disk low-cycle fatigue test.

[0003] Chinese Patent Document CN115200876A discloses a clamping device for aero-engine disk strength and life test, including a central pull rod. After passing through the test piece, one end of the central pull rod is connected to a connecting shaft, and the other end is connected to a pressing block. Both ends of the test piece are respectively matched with the connecting shaft and the pressing block through end tooth structures. However, the above scheme is only applicable to disks with end tooth structures at both ends.

[0004] When used for a spline torque transmission disk, since neither end of the spline torque transmission disk has an end tooth structure, it is impossible to perform circumferential positioning on the spline torque transmission disk based on the end tooth structure. Therefore, it is necessary to develop a special test tooling based on the spline torque transmission disk. Summary of the Invention

[0005] In view of this, the present invention provides a test tooling for a spline torque transmission disk to solve the problem that the existing test tooling cannot be applied to the spline torque transmission disk.

[0006] In a first aspect, the present invention provides a test tooling for a spline torque transmission disk, including:

[0007] A connecting shaft, one end of which is used to connect to a driving shaft, and the other end has an embedding groove. Along with the extension of the embedding groove, the inner side wall of the embedding groove sequentially has a clamping section and a threaded section. The clamping section is used to cooperate with the spline of the spline torque transmission disk;

[0008] A pull rod, one end of which is inserted into the embedding groove and cooperates with the threaded section in the embedding groove, and the other end is connected with a pressing member. The pressing member has a first annular flange extending radially outward, and the pressing member also has a first circumferential positioning structure;

[0009] A stop ring, which has a first matching portion that matches with the first circumferential positioning structure. The outer periphery of the stop ring has a second matching portion, and the second matching portion is used to cooperate with the second circumferential positioning structure on the spline torque transmission disk.

[0010] The technical solution of the present invention has the following advantages:

[0011] The test tooling provided by the present invention can be used for the strength test and low-cycle fatigue test of the spline torque transmission disk, providing technical support for engine identification.

[0012] During the assembly process, it can be visually determined whether the pre-tightening force of the pressing member is applied in place by judging whether the stop ring is assembled in place, solving the problem of checking whether the pre-tightening force is applied in place. At the same time, circumferential and axial limiting structures are proposed, making the disk operate more safely and reliably during high-speed rotation tests.

[0013] Specifically, the spline of the spline torque transmission disk is inserted through the insertion groove of the connecting shaft, and circumferential and radial limiting of the spline torque transmission disk is performed. The pull rod passes through the spline torque transmission disk and then is connected to the connecting shaft, and axial limiting of the spline torque transmission disk is performed through the first annular flange on the pressing member. Through the setting of the stop ring, which cooperates with the first circumferential positioning structure on the pressing member and the second circumferential positioning structure on the spline torque transmission disk respectively, it can be judged whether the pressing member is pressed in place.

[0014] Optionally, it further includes: a retaining ring, which cooperates with the spline torque transmission disk, and the retaining ring axially stops on the side of the stop ring away from the spline torque transmission disk. Through the setting of the retaining ring, it is used for axial limiting of the stop ring, so as to ensure that the stop ring can be stably maintained in the stop position.

[0015] Optionally, the pressing member has a second annular flange extending axially towards the inside of the spline torque transmission disk. Through the setting of the second annular flange, the gap between the pull rod and the spline torque transmission disk can be tightened, so as to achieve a tight fit between the pull rod and the spline torque transmission disk.

[0016] Optionally, the first circumferential positioning structure is a plurality of first lugs extending axially away from the spline torque transmission disk along the pressing member, and an opening groove is formed between adjacent two of the first lugs. Through the first circumferential positioning structure formed by this setting, during use, as long as the first fitting portion of the stop ring is inserted into the opening groove between any adjacent two first lugs, the circumferential positioning of the pressing member can be performed.

[0017] Optionally, the first fitting portion is a plurality of second lugs extending radially inwards along the stop ring, and the second lugs are adapted to be inserted into the opening grooves. Through the first fitting portion formed by this setting, the plurality of second lugs can respectively cooperate with the opening grooves between the plurality of first lugs, thereby improving the stability of the circumferential positioning of the pressing member.

[0018] Optionally, the second mating portion is at least one planar edge disposed on the outer side of the retaining ring. Through the arrangement of the planar edge, it can cooperate with the corresponding inner wall of the spline torque transmission wheel disc, thereby circumferentially positioning the retaining ring. During installation, through the cooperation of the planar edge with the corresponding inner wall of the spline torque transmission wheel disc, and at the same time, the first lug of the retaining ring can be inserted into the opening groove of the pressing member, thereby determining that the pressing member presses the spline torque transmission wheel disc in place.

[0019] Optionally, there are a plurality of the first lugs uniformly spaced along the circumference of the pressing member, a plurality of the second lugs uniformly spaced along the circumference of the retaining ring, and a plurality of the planar edges uniformly arranged along the circumference of the retaining ring. Through the above arrangement, the accuracy of determining whether the pressing member presses in place by the installation of the retaining ring can be further improved.

[0020] Optionally, the outer circumference of the pull rod for extending into the spline torque transmission wheel disc has a convex platform extending outward. Through the arrangement of the convex platform, it can be used to position the concentricity of the pull rod and the spline torque transmission wheel disc, thereby ensuring the concentricity of the pull rod and the spline torque transmission wheel disc.

[0021] Optionally, the convex platform is annular. Through this arrangement, the concentricity of the pull rod and the spline torque transmission wheel disc can be further ensured.

[0022] Optionally, the pull rod is of a hollow structure. Through this arrangement, the weight of the pull rod can be reduced, and the accuracy of the strength test of the wheel disc at high rotational speeds affected by the overweight of the pull rod can be avoided. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is the front view cross-sectional view of a test tooling for a spline torque transmission wheel disc provided by an embodiment of the present invention;

[0025] Figure 2 For Figure 1 The partial enlarged view of;

[0026] Figure 3 For Figure 1 The enlarged view of the connecting shaft shown in;

[0027] Figure 4 For Figure 1 The enlarged view of the pull rod shown in;

[0028] Figure 5 is Figure 2 an enlarged view of the pressing member shown in

[0029] Figure 6 is Figure 5 a side view of the pressing member shown in

[0030] Figure 7 is Figure 2 an enlarged view of the retaining ring shown in

[0031] Figure 8 is Figure 7 a side view of the retaining ring shown in

[0032] Figure 9 is Figure 2 an enlarged view of the snap ring shown in

[0033] Figure 10 is Figure 9 a side view of the snap ring shown in

[0034] Explanation of reference numerals:

[0035] 1. Connecting shaft; 2. Driving shaft; 3. Embedding groove; 4. Clamping section; 5. Thread section; 6. Spline torque transmission disc; 7. Pull rod; 8. First external thread section; 9. Second external thread section; 10. Boss; 11. Pressing member; 12. First annular flange; 13. Second annular flange; 14. Retaining ring; 15. Snap ring; 16. First lug; 17. Opening groove; 18. Second lug; 19. Flat side; 20. Third lug; 21. Positioning boss; 22. Adapter; 23. Balancing threaded hole; 24. Fitting surface; 25. Relief groove. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" 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 directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] As Figure 1 、 Figure 2 shown, a specific embodiment of the test tooling for the spline torque transmission disk 6 provided in this embodiment includes: a connecting shaft 1, a pull rod 7, and a stop ring 14.

[0041] As Figure 3 shown, one end of the connecting shaft 1 is used to connect with the driving shaft 2, and the other end has an embedding groove 3. The inner side wall of the embedding groove 3 sequentially has a clamping section 4 and a threaded section 5 as the embedding groove 3 extends. The clamping section 4 is used to cooperate with the spline of the spline torque transmission disk 6.

[0042] As Figure 1 、 Figure 3 shown, in this embodiment, one end of the connecting shaft 1 for connecting with the driving shaft 2 has a positioning boss 21. The connecting shaft 1 is connected to the driving shaft 2 through an adapter 22. The connecting shaft 1 is positioned by the positioning boss 21 to ensure concentricity with the adapter 22 and the driving shaft 2. When processing the root of the positioning boss 21, it is necessary to clear the root, that is, a groove facing the connecting shaft 1 is dug at the root of the positioning boss 21 to avoid interference with the adapter 22 during installation. In addition, in this embodiment, 20 M6 balance threaded holes 23 are evenly arranged circumferentially on the connecting shaft 1 for applying balance weights during the dynamic balance of the entire system.

[0043] As Figure 1 、 Figure 3As shown, in this embodiment, a mating surface 24 is further provided in the embedding groove 3 of the connecting shaft 1. The mating surface 24 is located at the notch of the embedding groove 3 and is used to cooperate with the corresponding surface on the wheel disc to play a role in positioning and centering. A relief groove 25 is further provided in the embedding groove 3 for pushing the tool when machining the clamping section 4 to avoid damaging the machining tool and the part.

[0044] As Figure 4 shown, one end of the pull rod 7 is used to insert into the embedding groove 3. A first external thread that mates with the threaded section 5 in the embedding groove 3 is provided on the outer wall of this section. A second external thread suitable for connecting the pressing member 11 is provided on the outer wall of the other end of the pull rod 7. That is to say, in this embodiment, the pressing member 11 is detachably connected to the pull rod 7 through a threaded structure. Of course, in some alternative embodiments, the pressing member 11 and the pull rod 7 may also be integrally formed.

[0045] As Figure 4 shown, several third lugs 20 extending axially outward are provided at one end of the pull rod 7 for connecting the pressing member 11. Through the arrangement of the third lugs 20, it is convenient to rotate the pull rod 7 by a tool.

[0046] As Figure 2 、 Figure 5 shown, in this embodiment, a first annular flange 12 extending radially outward is provided on the pressing member 11, and the first annular flange 12 is used to press one side of the spline torque transmission wheel disc 6.

[0047] In addition, in this embodiment, a first circumferential positioning structure is further provided on the pressing member 11. The retaining ring 14 has a first mating portion that mates with the first circumferential positioning structure. A second mating portion is provided on the outer circumference of the retaining ring 14, and the second mating portion is used to mate with the second circumferential positioning structure on the spline torque transmission wheel disc 6.

[0048] The test fixture provided in this embodiment can be used for the strength test and low-cycle fatigue test of the spline torque transmission wheel disc 6 to provide technical support for engine identification.

[0049] During the assembly process, it can be visually determined whether the preloading force of the pressing member 11 is applied in place by judging whether the retaining ring 14 is assembled in place, solving the problem of checking whether the preloading force is applied in place; at the same time, circumferential and axial limiting structures are proposed, making the operation of the wheel disc more safe and reliable during high-speed rotation tests.

[0050] Specifically, the spline of the spline torque transmission disk 6 is inserted into the embedding groove 3 of the connecting shaft 1, and the spline torque transmission disk 6 is circumferentially and radially limited. The pull rod 7 passes through the spline torque transmission disk 6 and then is connected to the connecting shaft 1. The first annular flange 12 on the pressing member 11 axially limits the spline torque transmission disk 6. Through the setting of the stop ring 14, which cooperates with the first circumferential positioning structure on the pressing member 11 and the second circumferential positioning structure on the spline torque transmission disk 6 respectively, it can be judged whether the pressing member 11 is pressed in place.

[0051] As Figure 2 shown, in some embodiments, it further includes: a retaining ring 15, the retaining ring 15 cooperates with the spline torque transmission disk 6, and the retaining ring 15 axially stops on the side of the stop ring 14 away from the spline torque transmission disk 6. Specifically, one side of the spline torque transmission disk 6 has an annular groove, and the retaining ring 15 can elastically deform to reduce its diameter, and then can be embedded into the annular groove in a free state. Through the setting of the retaining ring 15, it is used to axially limit the stop ring 14, so as to ensure that the stop ring 14 can be stably maintained in the stop position.

[0052] As Figure 9 、 Figure 10 shown, in this embodiment, the retaining ring 15 is an elastic ring. The retaining ring 15 can elastically reduce its own diameter by radially elastic deformation, so as to facilitate embedding into the groove of the spline torque transmission disk 6.

[0053] Of course, the above description is not restrictive. In some alternative embodiments, the retaining ring 15 can be omitted. Other structures can be used to axially limit the stop ring 14, such as positioning beads, etc.

[0054] As Figure 2 、 Figure 5 shown, in this embodiment, the pressing member 11 has a second annular flange 13 extending axially toward the inside of the spline torque transmission disk 6. Through the setting of the second annular flange 13, the gap between the pull rod 7 and the spline torque transmission disk 6 can be tightened, so as to realize the tight fit between the pull rod 7 and the spline torque transmission disk 6.

[0055] As Figure 5 、 Figure 6 shown, in this embodiment, the first circumferential positioning structure on the pressing member 11 is a plurality of first lugs 16 extending axially away from the spline torque transmission disk 6 along the pressing member 11, and an opening groove 17 is formed between two adjacent first lugs 16. Through the first circumferential positioning structure formed by this setting, in use, as long as the first mating portion of the stop ring 14 is inserted into the opening groove 17 between any two adjacent first lugs 16, the pressing member 11 can be circumferentially positioned.

[0056] As Figure 7 , Figure 8 shown, in this embodiment, the first mating portion of the retaining ring 14 is a plurality of second lugs 18 extending radially inward along the retaining ring 14, and the second lugs 18 are adapted to be inserted into the opening grooves 17. Through the first mating portion formed by this setting, the plurality of second lugs 18 can respectively cooperate with the opening grooves 17 between the plurality of first lugs 16, thereby improving the stability of circumferentially positioning the pressing member 11.

[0057] As Figure 7 , Figure 8 shown, in this embodiment, the second mating portion of the retaining ring 14 is at least one flat edge 19 provided on the outer side of the retaining ring 14. Through the setting of this flat edge 19, it can cooperate with the corresponding inner wall of the spline torque transmission wheel disc 6, thereby circumferentially positioning the retaining ring 14. During installation, through the cooperation of this flat edge 19 with the corresponding inner wall of the spline torque transmission wheel disc 6, and at the same time the first lug 16 of the retaining ring 14 can be inserted into the opening groove 17 of the pressing member 11, thereby determining that the pressing member 11 presses the spline torque transmission wheel disc 6 in place.

[0058] As Figure 6 , Figure 8 shown, in this embodiment, the first lugs 16 of the pressing member 11 are provided with a plurality of them evenly spaced along the circumference of the pressing member 11, the second lugs 18 of the retaining ring 14 are provided with a plurality of them evenly spaced along the circumference of the retaining ring 14, and the flat edges 19 are provided with a plurality of them evenly arranged along the circumference of the retaining ring 14. Through the above settings, the accuracy of determining whether the pressing member 11 is pressed in place by the installation of the retaining ring 14 can be further improved.

[0059] As Figure 7 , Figure 8 shown, in this embodiment, the retaining ring 14 is a planar annular structure. Through this setting, it is convenient for the processing of the retaining ring 14 and for the cooperation of the retaining ring 14 with the pressing member 11 and the spline torque transmission wheel disc 6 during installation.

[0060] As Figure 4 shown, in this embodiment, the outer circumference of the pull rod 7 for extending into the spline torque transmission wheel disc 6 has a boss 10 extending outward. Through the setting of this boss 10, it can be used to position the concentricity of the pull rod 7 and the spline torque transmission wheel disc 6, thereby ensuring the concentricity of the pull rod 7 and the spline torque transmission wheel disc 6.

[0061] As Figure 4As shown, in this embodiment, the boss 10 is annular. Through this setting, the concentricity between the pull rod 7 and the spline torque transmission disk 6 can be further ensured. Of course, the above description is not restrictive. In some alternative embodiments, the boss 10 can also be a plurality of spaced arcs or cylinders, etc.

[0062] As Figure 4 shown, in this embodiment, the pull rod 7 has a hollow structure. Through this setting, the weight of the pull rod 7 can be reduced, avoiding the influence of the overweight of the pull rod 7 on the accuracy of the strength test of the disk at high rotational speeds. Of course, the above description is not restrictive. In some alternative embodiments, the pull rod 7 can also adopt a solid structure.

[0063] Usage method:

[0064] First, the spline of the spline torque transmission disk 6 can be aligned with the clamping section 4 of the insertion groove 3 of the connecting shaft 1, inserted and ensured that the two are closely fitted, completing the circumferential and radial positioning of the disk.

[0065] Then, one end of the pull rod 7 with the first external thread is inserted into the insertion groove 3 of the connecting shaft 1 and screwed tightly with the threaded section 5 in the insertion groove 3.

[0066] Then, the pressing member 11 is screwed onto the pull rod 7 through the second external thread, and the pressing member 11 is rotated so that its first annular flange 12 gradually approaches and presses one side of the spline torque transmission disk 6 to achieve axial positioning. At the same time, the second annular flange 13 squeezes the gap between the pull rod 7 and the disk.

[0067] Then, the second lug 18 of the retaining ring 14 is aligned with the opening groove 17 of the pressing member 11 and inserted, and at the same time, the flat side 19 of the retaining ring 14 is fitted with the corresponding inner wall of the spline torque transmission disk 6. If the retaining ring 14 can be successfully installed in place, it indicates that the pre-tightening force of the pressing member 11 is applied in place.

[0068] Finally, the snap ring 15 is elastically deformed radially to reduce the diameter and embedded in the annular groove of the spline torque transmission disk 6 to perform axial positioning on the retaining ring 14 to ensure the stability of the retaining ring 14.

[0069] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A test tooling for a spline torque transmission disk, characterized in that, Comprising: A connecting shaft (1), one end of which is used to connect with a driving shaft (2), and the other end has an embedding groove (3). Along the inner side wall of the embedding groove (3) as the embedding groove (3) extends inwards, there are successively a clamping section (4) and a threaded section (5). The clamping section (4) is used to cooperate with the spline of a spline torque transmission wheel disc (6); A pull rod (7), one end of which is inserted into the embedding groove (3) and cooperates with the threaded section (5) in the embedding groove (3), and the other end is connected with a pressing member (11). The pressing member (11) has a first annular flange (12) extending radially outwards, and the pressing member (11) also has a first circumferential positioning structure; A stop ring (14), having a first matching portion that matches the first circumferential positioning structure. The outer periphery of the stop ring (14) has a second matching portion, and the second matching portion is used to cooperate with the second circumferential positioning structure on the spline torque transmission wheel disc (6).

2. The test tooling for a spline torque transmission disk according to claim 1, characterized in that, It further comprises: A retaining ring (15), which cooperates with the spline torque transmission wheel disc (6), and the retaining ring (15) axially stops on the side of the stop ring (14) away from the spline torque transmission wheel disc (6).

3. The test tooling for a spline torque transmission disk according to claim 1, characterized in that, The pressing member (11) has a second annular flange (13) extending axially towards the inside of the spline torque transmission wheel disc (6).

4. The test tooling for a spline torque transmission disk according to claim 1, characterized in that, The first circumferential positioning structure is a number of first lug ears (16) extending axially in a direction away from the spline torque transmission wheel disc (6) along the pressing member (11). An opening groove (17) is formed between two adjacent first lug ears (16).

5. The test tooling for the spline torque transmission disk according to claim 4, characterized in that, The first matching portion is a number of second lug ears (18) extending radially inwards along the stop ring (14), and the second lug ears (18) are adapted to be inserted into the opening groove (17).

6. The test tooling for the spline torque transmission disk according to claim 5, characterized in that, The second matching portion is at least one flat side (19) provided on the outer side of the stop ring (14).

7. The test tooling for the spline torque transmission disk according to claim 6, characterized in that, There are a plurality of the first lug ears (16) arranged at equal intervals circumferentially along the pressing member (11), a plurality of the second lug ears (18) arranged at equal intervals circumferentially along the stop ring (14), and a plurality of the flat sides (19) arranged at equal intervals circumferentially along the stop ring (14).

8. The test tooling for the spline torque transmission disk according to claim 1, characterized in that, The outer periphery of the pull rod (7) for extending into the inside of the spline torque transmission wheel disc (6) has a boss (10) extending outwards.

9. The test tooling for the spline torque transmission disk according to claim 8, characterized in that The boss (10) is annular.

10. The test tooling for a spline torque transmission disk according to any one of claims 1-9, characterized in that, The pull rod (7) is of a hollow structure.

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