A test fixture for solid wheel disks

Abstract

The application provides a test tool for a solid wheel disc, and belongs to the technical field of aero-engines, and comprises: an end-tooth shaft, which has an end-tooth surface that is engaged with an end-tooth ring of the solid wheel disc; and a center pull rod, which is connected to a center boss of the solid wheel disc at one end and is connected to a driving nut through the end-tooth shaft at the other end, and one side of the driving nut is abutted on the end-tooth shaft. The test tool for the solid wheel disc of the application is engaged with the end-tooth ring of the solid wheel disc through the end-tooth surface of the end-tooth shaft, and then is axially fixed through the center pull rod, so that the circumferential rotating force of the end-tooth shaft is transmitted to the solid wheel disc, and compared with the screw rod connection of the prior art, the problem that stress is concentrated at the through hole of the solid wheel disc is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aero-engine, in particular to a test tool for a solid disk. BACKGROUND

[0002] The solid disk is a main force component of an aero-engine, which has a complex structure, high rotating speed and a harsh working environment. Therefore, the strength and life test of the solid disk is needed to check whether the solid disk meets the design requirements. Such a test is a component test, which is usually carried out on a vertical disk tester. Therefore, a tool is needed to connect the disk and the tester.

[0003] Chinese patent document CN114486074A discloses a vertical dynamic balancing tool for a solid disk, which presses the disk rotor assembly into the fan-shaped positioning stop to firmly position it, then passes a T-shaped screw rod through the air hole of the disk rotor assembly and the bolt hole of the dynamic balancing tool, and fixes it by using a screw.

[0004] However, in the above-mentioned scheme, the T-shaped screw rod of the dismounting tool passes through the air hole of the disk rotor assembly and the bolt hole of the dynamic balancing tool, and the dismounting tool is fixed and installed by using a fixing nut, which will cause stress concentration at the air hole of the disk rotor assembly. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is to overcome the defect that the dynamic balancing tool in the prior art will form stress concentration at the connection when it is matched with the disk, thereby providing a test tool for a solid disk.

[0006] In order to solve the above-mentioned technical problem, the present application provides a test tool for a solid disk,

[0007] a pinion shaft, which has a pinion surface that is engaged with an end tooth ring of the solid disk;

[0008] a center pull rod, one end of which is connected with a center boss of the solid disk, and the other end of which passes through the pinion shaft and is connected with a driving nut, one side of the driving nut abutting on the pinion shaft.

[0009] Optionally, one end of the center pull rod for connecting the driving nut is provided with an external thread, and one end of the center pull rod for connecting the solid disk is provided with a sleeve structure for inserting into the center boss of the solid disk, and the sleeve structure is provided with an internal thread.

[0010] Optionally, one end of the center pull rod for connecting the driving nut is provided with a positioning flange at the root of the external thread, and the diameter of the positioning flange is greater than the inner diameter of the driving nut.

[0011] Optionally, one end of the center pull rod for connecting the solid wheel disc is provided with a clamping surface on the outer peripheral wall, and the clamping surface is suitable for being clamped with a tightening tool.

[0012] Optionally, the outer peripheral wall of the end tooth shaft is provided with a balance boss for adding or subtracting materials during dynamic balance test.

[0013] Optionally, the driving nut is a cylindrical nut, and the outer peripheral wall of the driving nut is provided with a clamping hole suitable for being clamped with a tightening tool.

[0014] Optionally, the adapter shaft is connected to the end tooth shaft at one end and is suitable for being connected to a tester at the other end.

[0015] Optionally, the adapter shaft and the end tooth shaft are detachably connected through a fastener.

[0016] Optionally, the adapter shaft has a central groove for accommodating the center pull rod and the driving nut.

[0017] Optionally, one side of the end tooth shaft facing the adapter shaft has a positioning boss suitable for being embedded in the central groove.

[0018] The technical scheme of the present application has the following advantages:

[0019] 1. The test tool for the solid wheel disc provided by the present application adopts the end tooth surface of the end tooth shaft to engage with the end tooth ring of the solid wheel disc, and then the center pull rod is used for axial fixation, so that the circumferential rotation force of the end tooth shaft is transmitted to the solid wheel disc. Compared with the screw connection of the prior art, the problem of stress concentration at the through hole of the solid wheel disc is not caused.

[0020] 2. The test tool for the solid wheel disc provided by the present application, the center pull rod is threadedly connected with the solid wheel disc and the driving nut respectively, so that relatively tight connection can be achieved, and the test tool can be easily disassembled.

[0021] 3. The test tool for the solid wheel disc provided by the present application is provided with a positioning flange on the center pull rod, which can prevent the driving nut from rotating excessively and causing the problem of being detached from the outer thread of the center pull rod.

[0022] 4. The test tool for the solid wheel disc provided by the present application is provided with a second balance boss on the adapter shaft, which can be used to remove materials during dynamic balance test, or a bolt hole with added materials can be designed, so that the problem of dynamic balance failure during the test process of the test tool can be prevented.

[0023] 5. The test tool for solid wheel provided by the present application, one side of the end tooth shaft facing the adapter shaft is provided with a positioning boss capable of being embedded in the central groove of the adapter shaft, during assembly, the positioning boss of the end tooth shaft is embedded in the central groove of the adapter shaft, so that the adapter shaft and the end tooth shaft can be precisely matched, and the connection of the fasteners between the adapter shaft and the end tooth shaft is realized. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0025] Figure 1 A front view of an embodiment of the test tool for solid wheel provided in the embodiments of the present application;

[0026] Figure 2 A front view of Figure 1 the end tooth shaft;

[0027] Figure 3 A front view of Figure 1 the adapter shaft;

[0028] Figure 4 A front view of Figure 1 the central pull rod;

[0029] Figure 5 A sectional view of Figure 4 the central pull rod;

[0030] Figure 6 A front view of Figure 1 the drive nut.

[0031] Explanation of reference signs:

[0032] 1, solid wheel; 2, end tooth ring; 3, central boss; 4, end tooth shaft; 5, central pull rod; 6, drive nut; 7, adapter shaft; 8, end tooth surface; 9, first balance boss; 10, positioning boss; 11, connecting bolt hole; 12, connecting bolt; 13, central groove; 14, through hole; 15, second balance boss; 16, tester interface; 17, positioning flange; 18, clamping surface; 19, clamping hole. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] The test fixture for solid discs provided in this embodiment is used to solve the defect of stress concentration at the connection when the dynamic balancing fixture is used with the disc in the prior art.

[0038] like Figure 1 As shown, this is a specific embodiment of the test fixture for a solid wheel provided in this example, including: an end gear shaft 4, the end of which has an end tooth surface 8 that meshes with the end tooth ring 2 of the solid wheel 1; a central tie rod 5, one end of which is connected to the central boss 3 of the solid wheel 1, and the other end passes through the end gear shaft 4 and is connected to a drive nut 6, one side of the drive nut 6 abutting against the end gear shaft 4.

[0039] The test fixture for solid discs provided in this embodiment uses the end tooth surface of the end toothed shaft to mesh with the end toothed ring of the solid disc, and then is axially fixed by the central tie rod, thereby realizing the transmission of the circumferential rotational power of the end toothed shaft to the solid disc. Compared with the screw connection of the prior art, it will not cause stress concentration at the through hole of the solid disc.

[0040] As Figure 2 shown in the embodiment, the first balancing boss 9 is arranged on the outer wall of the end tooth shaft 4, which is suitable for adding or subtracting materials during dynamic balancing test. By adding or subtracting materials on the first balancing boss 9, the end tooth shaft 4 can maintain a balanced state during the dynamic balancing test, so as to calculate the most real test data.

[0041] As Figures 2-3 shown in the embodiment, the positioning boss 10 is arranged on the side of the end tooth shaft 4 facing the adapter shaft 7, which is suitable for being embedded in the center groove 13. The positioning boss 10 of the end tooth shaft 4 can be positioned by the center groove 13 of the adapter shaft 7, which facilitates the subsequent detachable connection between the adapter shaft 7 and the end tooth shaft 4.

[0042] As Figures 2-3 shown in the embodiment, the center groove 13 is arranged on the adapter shaft 7, which can accommodate the center pull rod 5 and the drive nut 6. The center groove 13 can position the positioning boss 10 of the end tooth shaft 4, and facilitate the subsequent detachable connection between the adapter shaft 7 and the end tooth shaft 4.

[0043] As Figure 3 shown in the embodiment, the second balancing boss 15 is arranged on the end of the adapter shaft 7 close to the tester interface 16, which is suitable for adding or subtracting materials during dynamic balancing test. The test tool can always be in a balanced state during the dynamic balancing test, so as to obtain practical test data.

[0044] As Figure 4 shown in the embodiment, the positioning flange 17 is arranged on the end of the center pull rod 5 for connecting the drive nut 6. The diameter of the positioning flange 17 is greater than the outer diameter of the outer thread at one end of the center pull rod 5. In this way, the drive nut 6 can be prevented from being over-tightened and causing the drive nut 6 to come off the outer threaded end of the center pull rod 5.

[0045] As Figures 4-5 shown in the embodiment, the sleeve part of the center pull rod 5 is arranged on the end with internal threads, which is used to be inserted into the center boss 3 of the solid wheel 1. The outer wall of the sleeve part is provided with a clamping surface 18, which can be connected with a clamping tool. In this way, the center pull rod 5 is screwed, realizing the fixed connection between the internal threads in the sleeve part of the center pull rod 5 and the external threads of the center boss 3 of the solid wheel 1, which facilitates tightening and disassembly.

[0046] As Figures 5-6 shown, in the test tool for the solid wheel provided by the embodiment, the outer peripheral wall of the driving nut 6 is cylindrical, and a clamping hole 19 suitable for clamping with a tightening tool is arranged on the outer peripheral wall, so that the driving nut 6 is installed in cooperation with the outer thread of the center pull rod 5 near the positioning flange 17, thereby realizing the fixed connection of the solid wheel 1, the end tooth shaft 4 and the center pull rod 5.

[0047] First, the side with internal thread of the center pull rod 5 is connected with the center boss on the solid wheel 1, then the end tooth ring 2 of the solid wheel 1 is engaged with the end tooth surface 8 of the end tooth shaft 4, the driving nut 6 is connected with the side with external thread of the center pull rod 5, and then the tightening is realized by using the tightening tool, thereby realizing the axial fixation, so as to transmit the circumferential rotation force of the end tooth shaft to the solid wheel 1. The adapter shaft 7 is detachably connected with the end tooth shaft 4 through the connecting bolt 12, and the end of the adapter shaft 7 has an interface suitable for connecting the tester, the tester can be connected to simulate the dynamic balance condition of the solid wheel, and finally the installation of the test tool of the solid wheel is realized.

[0048] Obviously, the above embodiment is only an example for clearly illustrating, but not a limitation of the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A test fixture for a solid wheel, characterized by, The utility model relates to a kind of end tooth shafts (4), end tooth surface (8) with end tooth ring (2) of solid wheel (1) meshing cooperation is provided in end part; Center pull rod (5), one end is connected with the center boss (3) of the solid wheel (1), the other end passes through the end tooth shaft (4) and is connected with driving nut (6), one side of the driving nut (6) is abutted on the end tooth shaft (4); The end for connecting driving nut (6) of the center pull rod (5) is provided with outer thread, the end for connecting solid wheel (1) of the center pull rod (5) is provided with sleeve structure for inserting the center boss (3) of the solid wheel (1), inner thread is provided in the sleeve structure; The end for connecting driving nut (6) of the center pull rod (5), positioning flange (17) is provided at the root of outer thread, the diameter of the positioning flange (17) is greater than the inner diameter of the driving nut (6). The end for connecting solid wheel (1) of the center pull rod (5) is provided with clamping surface (18) on outer peripheral wall, and the clamping surface (18) is suitable for being clamped with tightening tool.

2. Test fixture for solid wheel disks according to claim 1, characterized in that Balance boss (9) for adding and subtracting material during dynamic balance test is provided on the outer peripheral wall of the end tooth shaft (4).

3. A test fixture for solid wheel disks as defined in claim 1, wherein, The driving nut (6) is the nut with cylindrical outer wall, and clamping hole suitable for being clamped with tightening tool is provided on the outer peripheral wall of the driving nut (6).

4. The test fixture for solid wheel disks of claim 1, wherein, Further comprising:

5. Test fixture for solid wheel discs according to any one of claims 1 to 4, characterized in that Adapter shaft (7), one end is connected with the end tooth shaft (4), the other end is suitable for connecting tester. The adapter shaft (7) and the end tooth shaft (4) are detachably connected by fastener.

6. A test fixture for solid wheel disks as defined in claim 5, characterized in that The adapter shaft (7) has central recess (13) for accommodating the center pull rod (5) and the driving nut (6).

7. A test fixture for solid wheel disks as defined in claim 6, characterized in that The side of the end tooth shaft (4) towards the adapter shaft (7) has positioning boss (10) suitable for embedding the central recess (13).

8. A test fixture for solid wheel disks as defined in claim 7, characterized in that ​

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