A rear bearing support alignment tool for an aviation auxiliary power unit
By designing a rear bearing support scheduling tooling including a clamping assembly and a scheduling assembly, the scheduling problem of the deformation of the rear bearing support of the aviation auxiliary power device is solved, and the circularity recovery of the bearing cylinder and the improvement of the calibration accuracy are achieved.
Patent Information
- Application Number
- CN202421471110.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The rear bearing support of the aviation auxiliary power unit is prone to deform during disassembly, resulting in performance impact and increased maintenance costs.
A rear bearing support school-type tooling including a hoop assembly and a school-type assembly is designed. The clamp assembly is locked on the outer peripheral wall of the bearing cylinder, and the driving handle drives the pressing cylinder to move along the axis. The direction of the tapered surface is changed to push the calibration block to move in the radial direction, and the compressed and deformed bearing cylinder restores circularity.
It effectively solves the problem of calibration after the deformation of the rear bearing support, restores the roundness of the bearing barrel, reduces maintenance costs, and improves the accuracy of calibration.
Smart Images
Figure CN222711359U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aviation auxiliary power devices, in particular to a rear bearing support calibrating tool for an aviation auxiliary power device. Background Art
[0002] Auxiliary Power Unit, referred to as APU, is a small gas turbine engine. Currently, the world's mainstream civil airliners and cargo aircraft are powered by APU to provide power and air sources. It is used to start the main engine of the aircraft on the ground and to provide bleed air and power supply for the aircraft's air conditioning system and electrical equipment on the ground or in flight.
[0003] The aviation auxiliary power unit is composed of several LRU parts, including the power section, load compressor, accessory gearbox and external components. After the APU runs for a fixed period or encounters a fault, it needs to be dispatched, cleaned, disassembled, repaired, and tested.
[0004] In the process of disassembling APU, parts deformation is often encountered. If the deformation of parts is not well repaired, it will have a great impact on the performance of the entire APU. If you choose to scrap the deformed parts, it will increase a lot of maintenance costs. Among the parts of APU, the deformation rate of the inner ring of the rear bearing support is very high, and this part is a high-value accessory. During operation, another high-value accessory rear bearing runs inside it. If the rear bearing support is deformed, it will squeeze the rear bearing. In severe cases, it will damage a series of components and cause serious losses. Utility Model Content
[0005] The purpose of the present application is to provide a rear bearing support alignment tool for an aviation auxiliary power unit to solve the alignment problem of the rear bearing support of the aviation auxiliary power unit after deformation.
[0006] In order to solve the above technical problems, the utility model adopts the following solutions:
[0007] The present application discloses a rear bearing support profiling tool for an aviation auxiliary power unit, comprising a hoop assembly with a circular inner circumferential wall for installation on the outer circumferential wall of a bearing cylinder, and a profiling assembly for installation in the bearing cylinder, wherein the profiling assembly comprises:
[0008] At least two sector-shaped correction blocks and a pushing cylinder for pushing the correction blocks to move radially outward, and a driving handle and a support block for driving the pushing cylinder to move axially, wherein:
[0009] The ends of the profiling block and / or the pushing cylinder close to each other are provided with a conical surface;
[0010] The driving handle passes through the pushing cylinder and is screwed to the supporting block.
[0011] Optionally, the support block is in the shape of a ring, and is provided with a plurality of limiting sliding grooves distributed along the circumferential direction, and the limiting sliding grooves are arranged parallel to the radial direction of the support block;
[0012] The shape correction block is provided with a limited screw hole;
[0013] The invention also comprises a limiting screw rod which passes through the limiting slide groove and is installed in the limiting screw hole.
[0014] Optionally, the profiling block is provided with at least two limiting screw holes, and the two or more limiting screw holes are distributed along the radial direction of the fan ring;
[0015] A limiting screw rod penetrating the limiting slide groove is installed in each limiting screw hole.
[0016] Optionally, the clamp assembly includes two semicircular shape-limiting clamps and a clamp fastening bolt for locking the two shape-limiting clamps together.
[0017] Optionally, the two shape-limiting clamps have the same structure, and both ends thereof are provided with connecting parts for installing clamp fastening bolts;
[0018] A mesh knob is installed on the bolt head of the mounting hoop fastening bolt.
[0019] Optionally, the driving handle includes a handle rotating rod, a threaded rod, and a pushing block for pushing the pushing cylinder to move along its axial direction, the pushing block is fixedly connected to the end of the threaded rod, and one end of the pushing block away from the threaded rod is fixedly connected to the middle position of the handle rotating rod;
[0020] A through hole for accommodating the threaded rod to pass through is arranged in the pushing cylinder, and the diameter of the through hole is larger than the diameter of the threaded rod.
[0021] Optionally, the number of the shaping blocks is four, and the central angle of the combined outer peripheral walls of the four shaping blocks is 360°.
[0022] Optionally, the four shaping blocks have the same shape, and the central angle corresponding to the outer peripheral wall of each shaping block is 90°.
[0023] Optionally, the ends of the profiling block and / or the pushing cylinder close to each other are both provided with conical surfaces, which are respectively a conical pressure-bearing surface located on the inner side of the profiling block and a conical pushing surface located on the outer periphery of the pushing cylinder.
[0024] Optionally, the angle between the conical pushing surface and the axis of the pushing cylinder ranges from 20° to 60°.
[0025] Beneficial effects of the utility model:
[0026] The present application sets a clamp assembly and a shaping assembly, and can use the clamp assembly to lock the outer wall of the rear bearing cylinder to be shaped. The driving handle is rotated to drive the pushing cylinder to move along its axis, so that the pushing cylinder can change the direction of the conical surface and push the shaping block to move along its radial direction, so that the outer wall of the shaping block and the inner wall of the clamp assembly are close to each other, thereby compressing the deformed bearing cylinder to restore its roundness, thereby solving the shaping problem of the rear bearing support of the current aviation auxiliary power unit after deformation. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is a schematic diagram of the structure when the rear bearing support is deformed in this application.
[0028] Figure 2 It is a schematic diagram of the structure of an embodiment of the present application.
[0029] Figure 3 It is a schematic diagram of the cross-sectional structure of an embodiment of the present application.
[0030] Figure 4 It is a schematic diagram of the structure of the embodiment of the present application during the calibration process.
[0031] Figure 5 It is a schematic diagram of the structure of the shape-limiting clamp in the embodiment of the present application.
[0032] Figure 6 It is a schematic diagram of the structure of the installation support in the embodiment of the present application.
[0033] Figure 7 It is a schematic diagram of the structure of the calibration block in the embodiment of the present application.
[0034] Figure 8 It is a schematic diagram of the cross-sectional structure of the cone head transmission cylinder in the embodiment of the present application.
[0035] Fig. 9 It is a schematic diagram of the structure of the driving handle in the embodiment of the present application.
[0036] Explanation of the accompanying drawings: 1-bearing cylinder, 21-limiting clamp, 211-connecting part, 22-clamp fastening bolt, 31-driving handle, 311-handle rotating rod, 312-pushing block, 313-threaded rod, 32-pushing cylinder, 321-through hole, 322-conical pushing surface, 33-shaping block, 331-limiting screw hole, 332-conical pressure surface, 34-support block, 341-support screw hole, 342-limiting slide groove, 35-limiting screw. DETAILED DESCRIPTION
[0037] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.
[0038] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.
[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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.
[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0041] like Figures 1 to 9 As shown, this embodiment provides a rear bearing support alignment tool for an aviation auxiliary power unit, including a hoop assembly with a circular inner circumferential wall for installation on the outer circumferential wall of a bearing cylinder 1, and an alignment assembly for installation in the bearing cylinder 1, the alignment assembly including:
[0042] At least two sector-shaped correction blocks 33 and a pushing cylinder 32 for pushing the correction blocks 33 to move radially outward, and a driving handle 31 and a support block 34 for driving the pushing cylinder 32 to move axially, wherein:
[0043] The end of the profiling block 33 and / or the pushing cylinder 32 close to each other is provided with a conical surface;
[0044] The driving handle 31 passes through the pushing cylinder 32 and is screwed to the supporting block 34 .
[0045] In this embodiment, by providing a clamp assembly and a shaping assembly, the clamp assembly can be used to lock the outer wall of the rear bearing cylinder 1 to be shaped, and the rotating driving handle 31 can drive the pushing cylinder 32 to move along its axis, so that the pushing cylinder 32 can change the direction of the conical surface to push the shaping block 33 to move along its radial direction, so that the outer wall of the shaping block 33 and the inner wall of the clamp assembly are close to each other, thereby compressing the deformed bearing cylinder 1 to restore the roundness, thereby solving the shaping problem of the rear bearing support of the current aviation auxiliary power unit after deformation.
[0046] Specifically, in this embodiment, Figure 6 As shown, the support block 34 is annular, and is provided with a plurality of limiting sliding grooves 342 distributed along the circumferential direction, and the limiting sliding grooves 342 are arranged parallel to the radial direction of the support block 34;
[0047] The shape correction block 33 is provided with a limited screw hole 331;
[0048] It also includes a limiting screw 35 that penetrates the limiting slot 342 and is installed in the limiting screw hole 331. By providing the limiting slot 342, the limiting screw hole 331 and the limiting screw 35, the swing amplitude of the shape correction block 33 when moving radially outward can be reduced, thereby improving the accuracy of the shape correction.
[0049] Specifically, in this embodiment, Figure 6 As shown, the shape correction block 33 is provided with at least two limiting screw holes 331, and the two or more limiting screw holes 331 are distributed along the radial direction of the fan ring;
[0050] A limiting screw 35 penetrating the limiting slot 342 is installed in each limiting screw hole 331. Each shape correction block 33 is provided with two limiting screw holes 331 and limiting screws 35, which can further reduce the swing amplitude during movement, so that the swing is limited by the two limiting screws 35, thereby improving the accuracy of shape correction.
[0051] Specifically, in this embodiment, Figure 2 As shown, the clamp assembly includes two semicircular limiting clamps 21 and a clamp fastening bolt 22 for locking the two limiting clamps 21 together. The clamp assembly is composed of two limiting clamps 21 and can be disassembled by the clamp fastening bolt 22, which is convenient for operators to use.
[0052] Specifically, in this embodiment, Figure 2 and Figure 4 As shown, the two shape-limiting clamps 21 have the same structure, and both ends thereof are provided with connecting parts 211 for installing clamp fastening bolts 22;
[0053] A mesh knob is installed on the bolt head of the mounting clamp fastening bolt 22. Two shape-limiting clamps 21 with the same structure can reduce the mold opening cost, and the mesh knob is installed on the bolt head, which can improve the ease of use of the fastening process.
[0054] Specifically, in this embodiment, Fig. 9As shown, the driving handle 31 includes a handle rotating rod 311, a threaded rod 313, and a pushing block 312 for pushing the pushing cylinder 32 to move along its axial direction. The pushing block 312 is fixedly connected to the end of the threaded rod 313, and one end of the pushing block 312 away from the threaded rod 313 is fixedly connected to the middle position of the handle rotating rod 311;
[0055] A through hole 321 is provided in the pushing cylinder 32 for accommodating the threaded rod 313 to pass through, and the diameter of the through hole 321 is larger than the diameter of the threaded rod 313. The handle rotating rod 311, the threaded rod 313 and the pushing block 312 can be fixed by welding. The pushing block 312 is cylindrical, and its diameter is initially larger than the diameter of the through hole 321, so that when the threaded rod 313 rotates, the pushing cylinder 32 can be smoothly pushed to move along its axial direction.
[0056] Specifically, in this embodiment, Figure 2 As shown, the number of the profiling blocks 33 is four, and the central angle of the outer peripheral walls of the four profiling blocks 33 after combination is 360°. In some embodiments, the number of the profiling blocks 33 can also be two, three, five, six, etc. No further details are given here.
[0057] Specifically, in this embodiment, Figure 6 As shown, the four shaping blocks 33 have the same shape, and the central angle corresponding to the outer peripheral wall of each shaping block 33 is 90°. The four shaping blocks 33 have the same shape, which can reduce the mold manufacturing cost of the tooling.
[0058] Specifically, in this embodiment, Figure 7 and Figure 8 As shown, the ends of the profiling block 33 and / or the pushing cylinder 32 that are close to each other are both provided with conical surfaces, which are respectively the conical pressure-bearing surface 332 located on the inner side of the profiling block 33 and the conical pushing surface 322 located on the outer periphery of the pushing cylinder 32. In this embodiment, the angles between the conical pressure-bearing surface 332 and the conical pushing surface 322 and the axis of the pushing cylinder 32 are different in size, and the angle between the conical pushing surface 322 and the axis of the pushing cylinder 32 is greater than the angle between the conical pressure-bearing surface 332 and the axis of the pushing cylinder 32.
[0059] In some embodiments, a tapered surface may be provided only on the end surface of the shaping block 33 or the pushing cylinder 32 .
[0060] Specifically, in this embodiment, Figure 8 As shown, the angle between the conical pushing surface 322 and the axis of the pushing cylinder 32 ranges from 20° to 60°. In this embodiment, the angle between the conical pushing surface 322 and the axis of the pushing cylinder 32 is 25°. In some embodiments, the angle may be 30°, 35°, 40°, 45°, etc., which will not be described in detail.
[0061] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.
Claims
1. A rear bearing support alignment tool for an aviation auxiliary power unit, characterized in that: It comprises a hoop assembly having a circular inner peripheral wall and used for being mounted on the outer peripheral wall of a bearing cylinder (1), and a shaping assembly used for being mounted in the bearing cylinder (1), wherein the shaping assembly comprises: At least two sector-shaped correction blocks (33) and a pushing cylinder (32) for pushing the correction blocks (33) to move radially outward, and a driving handle (31) and a support block (34) for driving the pushing cylinder (32) to move axially, wherein: The shaping block (33) and / or the pushing cylinder (32) are provided with a conical surface at one end close to each other; The driving handle (31) passes through the pushing cylinder (32) and is screw-connected with the supporting block (34).
2. The rear bearing support alignment tool for an aviation auxiliary power unit according to claim 1, characterized in that: The support block (34) is in the shape of a ring, and is provided with a plurality of limiting sliding grooves (342) distributed along the circumferential direction, and the limiting sliding grooves (342) are arranged parallel to the radial direction of the support block (34); The shaping block (33) is provided with a limiting screw hole (331); It also includes a limiting screw rod (35) that passes through the limiting sliding groove (342) and is installed in the limiting screw hole (331).
3. The rear bearing support alignment tool for an aviation auxiliary power unit according to claim 2, characterized in that: The shape correction block (33) is provided with at least two limiting screw holes (331), and the two or more limiting screw holes (331) are distributed along the radial direction of the sector ring; A limiting screw rod (35) penetrating the limiting sliding groove (342) is installed in each limiting screw hole (331).
4. The rear bearing support alignment tool for an aviation auxiliary power unit according to claim 1, characterized in that: The clamp assembly comprises two semicircular shape-limiting clamps (21) and a clamp fastening bolt (22) for locking the two shape-limiting clamps (21) together.
5. The rear bearing support profiling tool for an aviation auxiliary power unit according to claim 4, characterized in that: The two shape-limiting clamps (21) have the same structure, and both ends thereof are provided with connecting parts (211) for installing clamp fastening bolts (22); A mesh knob is installed on the bolt head of the mounting hoop fastening bolt (22).
6. The rear bearing support alignment tool for an aviation auxiliary power unit according to claim 1, characterized in that: The driving handle (31) comprises a handle rotating rod (311), a threaded rod (313), and a pushing block (312) for pushing the pushing cylinder (32) to move along its axial direction, wherein the pushing block (312) is fixedly connected to the end of the threaded rod (313), and one end of the pushing block (312) away from the threaded rod (313) is fixedly connected to the middle position of the handle rotating rod (311); A through hole (321) for accommodating the threaded rod (313) to pass through is arranged in the pushing cylinder (32), and the diameter of the through hole (321) is larger than the diameter of the threaded rod (313).
7. The rear bearing support alignment tool for an aviation auxiliary power unit according to claim 1, characterized in that: The number of the shaping blocks (33) is four, and the central angle of the combined outer peripheral walls of the four shaping blocks (33) is 360°.
8. The rear bearing support alignment tool for an aviation auxiliary power unit according to claim 7, characterized in that: The four shaping blocks (33) have the same shape, and the central angle corresponding to the outer peripheral wall of each shaping block (33) is 90°.
9. The rear bearing support alignment tool for an aviation auxiliary power unit according to claim 1, characterized in that: The ends of the profiling block (33) and / or the pushing cylinder (32) close to each other are both provided with conical surfaces, which are respectively a conical pressure-bearing surface (332) located on the inner side of the profiling block (33) and a conical pushing surface (322) located on the outer periphery of the pushing cylinder (32).
10. The rear bearing support alignment tool for an aviation auxiliary power unit according to claim 9, characterized in that: The angle between the conical pushing surface (322) and the axis of the pushing cylinder (32) ranges from 20° to 60°.