Aeroengine borescope teaching aid

Abstract

A borescope teaching aid of an aero-engine comprises a lower box, an upper box, a first rotating shaft and a plurality of impeller assemblies, the upper box covers the lower box to form an inner cavity, the upper box is detachably connected to the lower box, lower holes penetrating to the inner cavity are formed in the two opposite side faces of the lower box in the first direction, the first rotating shaft sequentially penetrates through the first lower hole, the inner cavity and the second lower hole, and the impeller assemblies are detachably connected to the first rotating shaft. The impeller assemblies are all arranged in the inner cavity and arranged on the first rotating shaft in a sleeving mode. The impeller assembly comprises a blade disc and a plurality of blades, the first rotating shaft is sleeved with the blade disc, a plurality of clamping grooves corresponding to the blades one to one are formed in the outer side wall of the blade disc in the circumferential direction of the blade disc, the clamping grooves comprise outer grooves and inner grooves which are arranged from outside to inside and communicate with each other, and the width of the outer grooves in the circumferential direction of the blade disc is smaller than that of the inner grooves in the circumferential direction of the blade disc. The blades are provided with clamping and fixing parts matched with the clamping grooves in shape, the clamping and fixing parts are located in the clamping grooves, and the clamping and fixing parts are connected to the clamping grooves in a clamped mode so as to connect the blades and the blade disc; the impeller has the advantages that the blades are convenient to replace, and the replacement efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of aviation maintenance teaching and training, in particular to a boresight teaching aid for aviation engines. Background Art

[0002] At present, in order to conduct boresight training for aircraft engines for technical personnel, retired or scrapped aircraft equipment parts and corresponding shells are generally assembled to make boresight teaching aids for aircraft engines. The internal structure of the shell of the teaching aid is similar to the internal structure of the aircraft engine, and boresight holes are provided at corresponding positions for boresight training. During the boresight training, in order to allow technical personnel to quickly become familiar with the conditions of blades with various defects in aircraft engines, it is necessary to replace the blades in the teaching aids many times during the boresight training. However, since the internal parts of the teaching aid are composed of retired or scrapped aircraft equipment parts, the connection relationship between the blades and the blade disk in its internal structure is consistent with that in a normal aircraft engine, the connection requirements are cumbersome and the connection is difficult (small matching clearance), which makes it difficult and inefficient to replace the blades, and it cannot meet the requirements of boresight training. Utility Model Content

[0003] The utility model aims to provide a borescope teaching tool for an aircraft engine, so as to solve the technical problem that blades of a common borescope teaching tool for an aircraft engine are difficult to replace.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a boresight teaching aid for an aircraft engine, comprising a lower box, an upper box, a first rotating shaft and a plurality of impeller assemblies, wherein the upper box cover is arranged on the upper part of the lower box to form an inner cavity, the upper box is detachably connected to the lower box, and the two opposite side surfaces of the lower box along a first direction are provided with lower holes penetrating into the inner cavity, the first rotating shaft passes through the first lower hole, the inner cavity and the second lower hole in sequence, and the impeller assemblies are all arranged in the inner cavity and sleeved on the first rotating shaft;

[0005] The impeller assembly includes a blade disk and a plurality of blades, the blade disk is sleeved on the first rotating shaft, the outer side wall of the blade disk is provided with a plurality of slots corresponding to the blades along its circumference, the slots include an outer slot and an inner slot arranged from the outside to the inside and connected to each other, the width of the outer slot along the circumference of the blade disk is smaller than the width of the inner slot along the circumference of the blade disk, the blade is provided with a fixing portion whose shape matches the fixing portion, the fixing portion is located in the fixing portion, and the fixing portion is connected to the fixing portion to connect the blade and the blade disk.

[0006] Optionally, the impeller assembly also includes a plurality of clamps corresponding one-to-one to the blades, the clamps including an operating part and an insertion rod, one end of the insertion rod is connected to the operating part, and the other end of the insertion rod is inserted between the bottom surface of the clamping part and the bottom of the inner groove, and the insertion rod pushes the clamping part away from the axis of the blade disk to fix the connection between the blade and the blade disk.

[0007] Optionally, the insertion rod is provided with blocks on both sides perpendicular to the radial direction of the blade disk, one of the blocks abuts against the bottom of the inner groove, and the other block abuts against the bottom surface of the fixing part, and the operating part is provided with a button, which is connected to the block and can drive the block to retract into the insertion rod.

[0008] Optionally, a side surface of the lower box perpendicular to the first direction is provided with a bore hole penetrating into the inner cavity.

[0009] Optionally, it further includes a first rotating handle, which is transmission-connected to the first rotating shaft, and the first rotating handle can drive the first rotating shaft to rotate.

[0010] Optionally, a gearbox is further included, wherein the first rotating handle is transmission-connected to an input end of the gearbox, and an output end of the gearbox is transmission-connected to the first rotating shaft, and the gearbox is used to change a transmission ratio between the first rotating handle and the first rotating shaft.

[0011] Optionally, it further includes a support frame located below the lower box, and the support frame is connected to two opposite side surfaces of the lower box along the first direction.

[0012] Optionally, it also includes a second rotating handle, a second rotating shaft and two connecting members, the support frame is provided with a frame hole passing through the first direction, the second rotating shaft passes through the frame hole and is rotatably connected to the frame hole, the two connecting members are respectively arranged on both sides of the upper box along the first direction, one end of the connecting member is connected to the upper box, and the other end is connected to the second rotating shaft, the second rotating handle is transmission-connected to the second rotating shaft, and the second rotating handle can drive the second rotating shaft to rotate, thereby opening the upper box.

[0013] Optionally, two bearing seats are further included, and the two bearing seats are respectively arranged on both sides of the lower box along the first direction and corresponding to the lower hole. The two bearing seats are both rotatably connected to the first rotating shaft, and the bearing seats are connected to the support frame.

[0014] Optionally, the upper box has upper holes extending through the inner cavity on two opposite side surfaces along the first direction, the upper holes are arranged corresponding to the lower holes, the upper holes are connected to the corresponding lower holes, and the first rotating shaft passes through the first upper hole and the first lower hole, the inner cavity and the second upper hole and the second lower hole in sequence.

[0015] Compared with the prior art, the borescope teaching aid for aircraft engines in the embodiment of the utility model has the following beneficial effects:

[0016] In the utility model, the blade disk of the impeller assembly is provided with a plurality of slots along its circumference, and the slots include an outer slot and an inner slot arranged from the outside to the inside and interconnected with each other, and the width of the outer slot along the circumference of the blade disk is smaller than the width of the inner slot along the circumference of the blade disk, and a clamping portion whose shape matches the slot is provided on the blade. When the clamping portion slides into the slot along a first direction, the stepped structure of the slot which becomes smaller from the inside to the outside cooperates with the shape structure matching the clamping portion, limiting the movement of the clamping portion and the blade along the direction other than the first direction of the blade disk, so that the blade can rotate with the first rotating shaft without being thrown out, thereby realizing the connection between the blade and the blade disk. Since the blade can be disassembled and assembled by moving the blade and the clamping portion along the first direction, the blade replacement is convenient and the replacement efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of the utility model is shown in FIG. Figure 1 .

[0018] Figure 2 The structure of the utility model is shown in FIG. Figure 2 .

[0019] Figure 3 The structure of the utility model is shown in FIG. Figure 3 .

[0020] Figure 4 The structure of the utility model is shown in FIG. Figure 4 .

[0021] Figure 5 A cross-sectional view of the connection between the first shaft and the impeller assembly Figure 1 .

[0022] Figure 6 A cross-sectional view of the connection between the first shaft and the impeller assembly Figure 2 .

[0023] Figure numerals: 1, lower box; 2, upper box; 3, first rotating shaft; 4, impeller assembly; 41, blade disk; 411, slot; 42, blade; 43, fixing portion; 44, clamping piece; 441, operating portion; 442, insertion rod; 443, button; 444, clamping block; 5, first rotating handle; 6, second rotating handle; 7, support frame; 8, gearbox; 9, second rotating shaft; 10, connecting piece; 20, bearing seat. DETAILED DESCRIPTION

[0024] 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.

[0025] In the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "circumferential", etc. indicate orientations or positional relationships based on the orientations 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] like Figures 1 to 6As shown, the utility model is a boresight teaching aid for aircraft engines, comprising a lower box 1, an upper box 2, a first rotating shaft 3 and a plurality of impeller assemblies 4, wherein the upper box 2 is covered on the upper part of the lower box 1 to form an inner cavity, the upper box 2 is detachably connected to the lower box 1, and the two opposite side surfaces of the lower box 1 along a first direction are provided with lower holes penetrating to the inner cavity, the first rotating shaft 3 passes through the first lower hole, the inner cavity and the second lower hole in sequence, the impeller assemblies 4 are all arranged in the inner cavity and sleeved on the first rotating shaft 3; the impeller assembly 4 comprises a blade disk 41 and a plurality of blades 42, The blade disk 41 is sleeved on the first rotating shaft 3, and the outer side wall of the blade disk 41 is provided with a plurality of slots 411 corresponding to the blades 42 along its circumference, and the slots 411 include an outer slot and an inner slot arranged from the outside to the inside and connected to each other, and the width of the outer slot along the circumference of the blade disk 41 is smaller than the width of the inner slot along the circumference of the blade disk 41, and the blade 42 is provided with a fixing portion 43 whose shape matches the fixing portion 411, and the fixing portion 43 is located in the fixing portion 411, and the fixing portion 43 is connected to the fixing portion 411 to connect the blade 42 and the blade disk 41.

[0028] In the above technical solution, the stepped structure of the slot 411 that becomes smaller from the inside to the outside is matched with the shape structure of the fixing portion 43, and the fixing portion 43 is restricted by the groove walls, groove bottom and groove top on both sides of the inner groove in the slot 411, so that the slot 411 can restrict the fixing portion 43 and the blade 42 from moving in directions other than the first direction, so that the blade 42 can rotate with the first rotating shaft 3 without being thrown out, thereby realizing the connection between the blade 42 and the blade disk 41. Furthermore, since the blade 42 and the fixing portion 43 can be moved along the first direction The blade 42 can be disassembled and assembled by moving, so that the blade 42 can be easily replaced and the replacement efficiency is high. Since the device is a teaching aid for training, the rotation speed of the first rotating shaft 3 will not be too high and the rotation will not be too violent. It is difficult for the blade 42 to move along the first direction to the clamping part 43 to disengage from the clamping groove 411 in one bore detection. Moreover, the gap between the clamping groove 411 and the clamping part 43 can be controlled to control the difficulty of the blade 42 moving along the first direction. In order to improve the convenience and efficiency of replacing the blade 42, the axial movement of the blade 42 may not be restricted.

[0029] Furthermore, in order to limit the axial movement of the blades 42 along the blade disk 41, the impeller assembly 4 also includes a plurality of clamps 44 corresponding to the blades 42 one by one, and the clamps 44 include an operating part 441 and an insertion rod 442, one end of the insertion rod 442 is connected to the operating part 441, and the other end is inserted between the bottom surface of the clamping part 43 and the bottom of the inner groove, and the insertion rod 442 pushes the clamping part 43 in a direction away from the axis of the blade disk 41 to fix the blade 42 and the blade disk 41, wherein the technician can push and pull the operating part 441 to insert or pull out the insertion rod 442; further, the shape of the insertion part from the front end to the rear end can be gradually increased so that the insertion part is inserted between the bottom surface of the clamping part 43 and the bottom of the inner groove.

[0030] Furthermore, in order to facilitate the insertion of the insertion part between the bottom surface of the clamping part 43 and the bottom of the inner groove and the removal therefrom, the insertion rod 442 is provided with blocks 444 on both sides perpendicular to the radial direction of the blade disk 41, one of the blocks 444 abuts against the bottom of the inner groove, and the other block 444 abuts against the bottom surface of the clamping part 43, and the operating part 441 is provided with a button 443, which is connected to the block 444, and the button 443 can drive the block 444 to retract into the insertion rod 442.

[0031] Furthermore, a boresight hole penetrating into the inner cavity is provided on the side of the lower box 1 perpendicular to the first direction, so that a technician can perform boresight through the boresight hole.

[0032] Furthermore, it also includes a first rotating handle 5, which is transmission-connected to the first rotating shaft 3. The first rotating handle 5 can drive the first rotating shaft 3 to rotate, so that a technician can rotate the first rotating shaft 3 through the first rotating handle 5 to change the position of the blade 42, thereby facilitating the detection of each blade 42 in the borehole.

[0033] Furthermore, in order to facilitate the rotation of the first rotating handle 5, the boresight teaching aid also includes a gearbox 8, the first rotating handle 5 is transmission-connected to the input end of the gearbox 8, and the output end of the gearbox 8 is transmission-connected to the first rotating shaft 3, and the gearbox 8 is used to change the transmission ratio between the first rotating handle 5 and the first rotating shaft 3.

[0034] Furthermore, it also includes a support frame 7 located below the lower box 1, and the support frame 7 is connected to two opposite side surfaces of the lower box 1 along the first direction to lift the lower box 1 to facilitate technical personnel to perform hole detection.

[0035] Furthermore, in order to facilitate opening and closing of the upper box 2, so as to facilitate replacement of the blades 42 and simulate the environment of the engine cavity, it also includes a second rotating handle 6, a second rotating shaft 9 and two connecting members 10. The support frame 7 is provided with a frame hole passing through the first direction, the second rotating shaft 9 passes through the frame hole and is rotatably connected to the frame hole, the two connecting members 10 are respectively arranged on both sides of the upper box 2 along the first direction, one end of the connecting member 10 is connected to the upper box 2, and the other end is connected to the second rotating shaft 9. The second rotating handle 6 is transmission-connected to the second rotating shaft 9, and the second rotating handle 6 can drive the second rotating shaft 9 to rotate, thereby opening the upper box 2.

[0036] Furthermore, it also includes two bearing seats 20, which are respectively arranged on both sides of the lower box 1 along the first direction and corresponding to the lower hole. The two bearing seats 20 are both rotatably connected to the first rotating shaft 3, and the bearing seats 20 are connected to the support frame 7 to support the two ends of the first rotating shaft 3 and allow the first rotating shaft 3 to rotate normally.

[0037] Furthermore, in order to facilitate the disassembly and assembly of the first rotating shaft 3, the two side surfaces opposite to each other along the first direction of the upper box 2 are provided with upper holes that penetrate into the inner cavity, the upper holes are arranged corresponding to the lower holes, and the upper holes are connected to the corresponding lower holes. The first rotating shaft 3 passes through the first upper hole and the first lower hole, the inner cavity and the second upper hole and the second lower hole in sequence, so that the installation process of the first rotating shaft 3 is to open the upper box 2, put the first rotating shaft 3 into the lower hole from top to bottom, close the upper box 2, so that the first rotating shaft 3 is located in the upper hole and the lower hole, and the disassembly process is the opposite.

[0038] Furthermore, the specific connection methods of the fixed setting and the fixed connection refer to the relative position relationship of the two components that can be fixedly connected, including fixing through a connector 10, fixing through welding, fixing through an adhesive, fixing through one-piece molding, and fixing through a snap connection.

[0039] Furthermore, the specific connection mode of the detachable connection refers to that the two connected parts can be repeatedly disassembled and assembled without damage or serious deformation, including fixation by a connector 10 and fixation by a snap connection.

[0040] Furthermore, the rotational connection refers to the ability of two connected parts to rotate, including connection through bearings and connection through clearance fit.

[0041] Furthermore, the connecting member 10 includes a fastener, a strap, a tie rope, a pneumatic connecting element, a hydraulic connecting element, a flange plate, Velcro, and a button.

[0042] In summary, the embodiment of the utility model provides a borescope teaching aid for an aircraft engine, and its technical effects are:

[0043] In the utility model, the blade disk 41 of the impeller assembly 4 is provided with a plurality of slots 411 along its circumference, and the slots 411 include an outer slot and an inner slot arranged from the outside to the inside and interconnected with each other, and the width of the outer slot along the circumference of the blade disk 41 is smaller than the width of the inner slot along the circumference of the blade disk 41, and a clamping portion 43 whose shape matches the slot 411 is provided on the blade 42. When the clamping portion 43 slides into the slot 411 along a first direction, the stepped structure of the slot 411 that becomes smaller from the inside to the outside cooperates with the shape structure that matches the clamping portion 43, limiting the movement of the clamping portion 43 and the blade 42 along the blade disk 41 in directions other than the first direction, so that the blade 42 can rotate with the first rotating shaft 3 without being thrown out, thereby realizing the connection between the blade 42 and the blade disk 41, wherein, since the blade 42 can be disassembled and assembled by moving the blade 42 and the clamping portion 43 along the first direction, the blade 42 has the effect of convenient replacement and high replacement efficiency.

[0044] 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 borescope teaching aid for aircraft engines, characterized in that: The invention comprises a lower box (1), an upper box (2), a first rotating shaft (3) and a plurality of impeller assemblies (4); the upper box (2) is covered on the upper part of the lower box (1) to form an inner cavity; the upper box (2) is detachably connected to the lower box (1); two opposite side surfaces of the lower box (1) along a first direction are provided with lower holes penetrating into the inner cavity; the first rotating shaft (3) passes through the first lower hole, the inner cavity and the second lower hole in sequence; the impeller assemblies (4) are arranged in the inner cavity and sleeved on the first rotating shaft (3); The impeller assembly (4) comprises a blade disk (41) and a plurality of blades (42); the blade disk (41) is sleeved on the first rotating shaft (3); an outer wall of the blade disk (41) is provided with a plurality of slots (411) corresponding to the blades (42) along its circumference; the slots (411) comprise an outer slot and an inner slot arranged from outside to inside and connected to each other; the width of the outer slot along the circumference of the blade disk (41) is smaller than the width of the inner slot along the circumference of the blade disk (41); the blade (42) is provided with a fixing portion (43) whose shape matches the fixing portion (411); the fixing portion (43) is located in the fixing portion (411); the fixing portion (43) is fixed to the fixing portion (411) to connect the blade (42) and the blade disk (41).

2. The borescope teaching aid for aircraft engines according to claim 1, characterized in that: The impeller assembly (4) further comprises a plurality of clamping members (44) corresponding one to the blades (42), the clamping members (44) comprising an operating portion (441) and an insertion rod (442), one end of the insertion rod (442) being connected to the operating portion (441) and the other end being inserted between the bottom surface of the clamping member (43) and the bottom of the inner groove, the insertion rod (442) pushing the clamping member (43) in a direction away from the axis of the blade disk (41) to fix the blades (42) and the blade disk (41) in connection.

3. The borescope teaching aid for aircraft engines according to claim 2, characterized in that: The insertion rod (442) is provided with blocks (444) on both radial side surfaces perpendicular to the blade disk (41), one of the blocks (444) abuts against the bottom of the inner groove, and the other block (444) abuts against the bottom surface of the fixing portion (43); the operating portion (441) is provided with a button (443), the button (443) is connected to the block (444), and the button (443) can drive the block (444) to retract into the insertion rod (442).

4. The borescope teaching aid for aircraft engines according to claim 1, characterized in that: The side surface of the lower box (1) perpendicular to the first direction is provided with a bore hole penetrating into the inner cavity.

5. The borescope teaching aid for aircraft engines according to claim 1, characterized in that: It also comprises a first rotating handle (5), wherein the first rotating handle (5) is transmission-connected to the first rotating shaft (3), and the first rotating handle (5) can drive the first rotating shaft (3) to rotate.

6. The borescope teaching aid for aircraft engines according to claim 5, characterized in that: The invention also comprises a gearbox (8), wherein the first rotating handle (5) is drivingly connected to the input end of the gearbox (8), and the output end of the gearbox (8) is drivingly connected to the first rotating shaft (3), and the gearbox (8) is used to change the transmission ratio between the first rotating handle (5) and the first rotating shaft (3).

7. The borescope teaching aid for aircraft engines according to claim 1, characterized in that: It also comprises a support frame (7) located below the lower box (1), and the support frame (7) is connected to two opposite side surfaces of the lower box (1) along a first direction.

8. The borescope teaching aid for aircraft engines according to claim 7, characterized in that: It also includes a second rotating handle (6), a second rotating shaft (9) and two connecting members (10). The support frame (7) is provided with a frame hole extending through the first direction. The second rotating shaft (9) passes through the frame hole and is rotatably connected to the frame hole. The two connecting members (10) are respectively arranged on both sides of the upper box (2) along the first direction. One end of the connecting member (10) is connected to the upper box (2), and the other end is connected to the second rotating shaft (9). The second rotating handle (6) is transmission-connected to the second rotating shaft (9). The second rotating handle (6) can drive the second rotating shaft (9) to rotate, thereby opening the upper box (2).

9. The borescope teaching aid for aircraft engines according to claim 7, characterized in that: It also includes two bearing seats (20), which are respectively arranged on both sides of the lower box (1) along the first direction and corresponding to the lower hole. The two bearing seats (20) are both rotatably connected to the first rotating shaft (3), and the bearing seats (20) are connected to the support frame (7).

10. The borescope teaching aid for aircraft engines according to claim 1, characterized in that: The upper box (2) is provided with upper holes penetrating into the inner cavity on two opposite side surfaces along the first direction, the upper holes are arranged corresponding to the lower holes, the upper holes are connected to the corresponding lower holes, and the first rotating shaft (3) passes through the first upper hole and the first lower hole, the inner cavity and the second upper hole and the second lower hole in sequence.

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