Airplane main wheel brake fan simulation teaching aid

Abstract

The utility model discloses an airplane main wheel brake fan simulation teaching aid, which comprises a fan motor simulation piece, a spline shaft, a fan impeller, a protection cover mounting bracket, a fan protection cover and a dust cover, a motor rotating shaft is rotationally arranged at the front end of the fan motor simulation piece, and an axis hole is formed in the motor rotating shaft; the spline shaft is rotatably mounted in the fan motor simulation piece and penetrates out of an axis hole of the motor rotating shaft, and a spline part is arranged at the front end of the spline shaft; the fan impeller is coaxially fixed at the front end of the motor rotating shaft; the fan protection cover covers the fan impeller and is fixed on the protection cover mounting bracket, a spline sleeve is arranged on the rear side of the center of the fan protection cover, and a spline part at the front end of the spline shaft is inserted and matched in the spline sleeve; and the dustproof cover is arranged outside the protective cover mounting bracket and is fixed on the protective cover mounting bracket. According to the utility model, the problems of incomplete dismounting and mounting practice process caused by lack of a brake fan on a main wheel aircraft teaching aid and huge cost caused by using an available aviation material as a teaching aid are solved.

Description

Technical Field

[0001] This utility model relates to the field of aerospace training technology, specifically to a simulated teaching aid for aircraft main wheel brake fans. Background Technology

[0002] Aircraft maintenance training relies on matching teaching aids, which are generally made from scrapped aircraft parts removed from the aircraft. Main wheel replacement on an A320 aircraft is one of the most common maintenance tasks and a skill that maintenance personnel must master. The removal and installation of the brake fan is the main procedure in main wheel replacement.

[0003] However, although brake fans are auxiliary components on the main wheels, damaged parts can be reused after being returned to the factory for repair, and scrapping is extremely rare. Aircraft parts are generally made of lightweight aluminum alloys, and with frequent disassembly and assembly by trainees, the structure of these components is easily damaged, making training aids consumables. Purchasing usable aircraft parts directly as training aids would be extremely costly. Therefore, most civil aviation aircraft maintenance training institutions and units currently do not install brake fans on their main wheel training aids. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a simulated teaching aid for aircraft main wheel brake fans, which solves the problems of incomplete disassembly and assembly practice due to the lack of brake fans on main wheel aircraft teaching aids, as well as the huge cost of using available aviation materials as teaching aids.

[0005] This utility model provides a teaching aid simulating an aircraft main wheel brake fan, including:

[0006] A fan motor simulator is used to fix the fan motor simulator on the axle of the main wheel. The front end of the fan motor simulator is rotatably provided with a motor shaft, and the motor shaft is provided with a shaft hole.

[0007] A splined shaft is rotatably mounted inside a fan motor simulator and passes through the central hole of the motor shaft. The front end of the splined shaft is provided with a splined section.

[0008] A fan impeller, which is coaxially fixed to the front end of the motor shaft;

[0009] A protective cover mounting bracket is used to fix the protective cover to the hub of the main wheel;

[0010] A fan protective cover covers the fan impeller and is fixed on a protective cover mounting bracket. A spline sleeve is provided on the rear side of the center of the fan protective cover, and the spline part at the front end of the spline shaft is inserted into the spline sleeve.

[0011] A dust cover is disposed outside the protective cover mounting bracket and fixed on the protective cover mounting bracket.

[0012] Furthermore, the front end of the fan motor simulator is provided with a shaft mounting groove, the rear end of the motor shaft is mounted in the shaft mounting groove through a first bearing, a first limiting part is provided on the outside of the motor shaft located in front of the first bearing and adapted to the shaft mounting groove, and a limiting ring is fixed on the front end of the fan motor simulator by screws, which is sleeved on the outside of the motor shaft and limited to the front side of the first limiting part.

[0013] Furthermore, the fan motor simulator has an axially penetrating spline shaft hole, and a limiting groove is provided at the rear end of the spline shaft hole. The spline shaft is adapted to the spline shaft hole and installed in the limiting groove through a second bearing. The rear end of the spline shaft is provided with a second limiting part adapted to the limiting groove. The rear end of the fan motor simulator is provided with a rear cover that is fixed to the limiting groove by screws.

[0014] Furthermore, the spline shaft includes a rear shaft adapted to the spline shaft hole and a front shaft extending out of the front end of the fan motor simulation component, the rear shaft and the front shaft being threaded together.

[0015] Furthermore, the front end of the motor shaft is provided with a connecting part, the rear end of the connecting part forms an annular stepped surface, the front end of the connecting part is provided with a threaded connecting part, the fan impeller is sleeved on the connecting part and abuts against the front side of the annular stepped surface, an impeller fixing nut is tightened on the threaded connecting part, and an impeller washer is provided between the impeller fixing nut and the fan impeller.

[0016] Furthermore, the front end of the spline sleeve is provided with a first connecting piece, and the front side of the fan protective cover is provided with a second connecting piece. The first connecting piece, the fan protective cover and the second connecting piece are fixed together by rivets.

[0017] Furthermore, the protective cover mounting bracket includes an inner ring, an outer ring, and multiple spokes connecting the inner ring and the outer ring. The inner ring is used to be fixed to the hub of the main wheel by a clamp, and the outer ring, the fan protective cover, and the dust cover are fixedly connected by bolts.

[0018] Furthermore, the thickness of the spokes is 2 mm.

[0019] Furthermore, the inner ring is a one-piece structure.

[0020] Furthermore, the fan motor simulator and fan impeller are made of aluminum alloy, while the motor shaft, spline shaft, protective cover mounting bracket, fan protective cover, and dust cover are made of stainless steel.

[0021] The beneficial effects of this utility model are reflected in:

[0022] (1) The aircraft main wheel brake fan simulation teaching aid provided in this application can simulate the original A320 aircraft main wheel brake fan, achieving complete replacement and fully meeting the teaching needs of A320 main wheels, allowing students to effectively practice the complete disassembly and assembly of main wheels.

[0023] (2) The original A320 aircraft main wheel brake fan has a fan impeller mounted on the motor shaft at the front end of the fan motor, and a speed sensor connected to the splined shaft at the rear end of the fan motor. Its function is to cool the aircraft main wheel and calculate the actual wheel speed. Since this application is for teaching purposes and is only used to practice disassembling and assembling the brake fan, it does not involve disassembling and assembling the fan motor or wheel speed sensor. Therefore, the fan motor has been simplified. This fan motor is installed inside the main wheel axle and looks no different from the original. So from the perspective of teaching students, the effect is the same. This satisfies the disassembly and assembly practice while reducing costs.

[0024] (3) The spline shaft of the original A320 aircraft main wheel brake fan is an integral piece. During the disassembly and assembly practice, the part of the spline shaft that extends out of the fan motor is easily damaged. If it is damaged, the whole thing needs to be replaced. The spline shaft of this application is made by threading the rear shaft and the front shaft together. The rear shaft is inside the fan motor simulation part and is not easily damaged. If the front shaft is damaged, the front shaft can be replaced directly, saving costs.

[0025] (4) The thickness of the protective cover mounting bracket of this application is 2mm, which strengthens the strength and makes it less likely to be damaged during disassembly and assembly. In addition, the inner ring of the protective cover mounting bracket of the original A320 aircraft main wheel brake fan is a split design, while this application designs it into an integrated structure, which is convenient for processing and manufacturing.

[0026] (5) Compared with the original A320 aircraft main wheel brake fan which uses lightweight aluminum alloy, this application replaces the frequently disassembled parts with stainless steel, which has high strength and greatly extends the service life of the teaching aid.

[0027] (6) This application reduces the cost of original aviation materials from millions to several thousand yuan, which is much cheaper and greatly reduces costs. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0029] Figure 1 This is an exploded perspective view of an embodiment of the present utility model;

[0030] Figure 2This is an assembly cross-sectional view of an embodiment of the present utility model.

[0031] In the attached diagram, 100-fan motor simulation component; 110-motor shaft; 111-first limiting part; 120-first bearing; 130-limiting ring; 140-second bearing; 150-rear cover; 200-splined shaft; 210-rear shaft; 211-second limiting part; 220-front shaft; 221-splined part; 300-fan impeller; 310-impeller fixing nut; 320-impeller washer; 400-protective cover mounting bracket; 410-inner ring; 420-outer ring; 430-spoke; 500-fan protective cover; 510-splined sleeve; 511-first connecting piece; 520-second connecting piece; 600-dust cover. Detailed Implementation

[0032] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0033] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0034] like Figure 1 and Figure 2 As shown, this utility model embodiment provides an aircraft main wheel brake fan simulation teaching aid, including a fan motor simulation component 100, a splined shaft 200, a fan impeller 300, a protective cover mounting bracket 400, a fan protective cover 500, and a dust cover 600.

[0035] The fan motor simulator 100 is fixed on the axle of the main wheel. The front end of the fan motor simulator 100 is rotatably provided with a motor shaft 110, and the motor shaft 110 is provided with a shaft hole.

[0036] It should be noted that the fan motor simulator 100 is not a real motor, but an aluminum alloy part machined to have the same shape as the original fan motor. This saves costs while meeting the requirements for teaching practice.

[0037] Optionally, the fan motor simulator 100 is made of 6-series aluminum alloy, and the motor shaft 110 is made of 304 stainless steel.

[0038] In some embodiments, the front end of the fan motor simulator 100 is provided with a shaft mounting groove, and the rear end of the motor shaft 110 is mounted in the shaft mounting groove via a first bearing 120. A first limiting portion 111 is provided outside the motor shaft 110, located in front of the first bearing 120 and adapted to the shaft mounting groove. A limiting ring 130, which is sleeved on the motor shaft 110 and limited to the front of the first limiting portion 111, is fixed to the front end of the fan motor simulator 100 by screws. When installing the motor shaft 110, the motor shaft 110 and the first bearing 120 are first inserted into the shaft mounting groove, and then the limiting ring 130 is sleeved on the motor shaft 110. The limiting ring 130 is then fixed to the front end of the fan motor simulator 100 by screws, thereby locking the first limiting portion 111 outside the motor shaft 110 in the shaft mounting groove.

[0039] The spline shaft 200 is rotatably mounted inside the fan motor simulation component 100 and passes through the shaft hole of the motor shaft 110. The front end of the spline shaft 200 is provided with a spline portion 221.

[0040] In some embodiments, the fan motor simulator 100 has an axially penetrating spline shaft hole, and a limiting groove is provided at the rear end of the spline shaft hole. The spline shaft 200 is adapted to the spline shaft hole and installed in the limiting groove through a second bearing 140. The rear end of the spline shaft 200 has a second limiting part 211 adapted to the limiting groove. The rear end of the fan motor simulator 100 has a rear cover 150 that is fixed to the outside of the limiting groove by screws. When installing the spline shaft 200, the second bearing 140 is first installed in the limiting groove, and the spline shaft 200 is passed through the spline shaft hole from the rear end of the fan motor simulator 100. Then, the rear cover 150 is placed on the rear end of the limiting groove and fixed to the rear end of the fan motor simulator 100 by screws, thereby locking the second limiting part 211 at the rear end of the spline shaft 200 in the limiting groove.

[0041] It should be noted that the spline shaft 200 is part of the original A320 aircraft main wheel brake fan and is used to connect the speed sensor. This application is for disassembly and assembly practice, and its rear end does not need to be connected to the speed sensor to meet the requirements.

[0042] In some embodiments, the spline shaft 200 includes a rear shaft 210 adapted to a spline shaft hole and a front shaft 220 extending out of the front end of the fan motor simulator 100. The rear shaft 210 and the front shaft 220 are threaded together. The spline shaft of the original A320 aircraft main wheel brake fan is a single piece. During disassembly and assembly practice, the part of the spline shaft 200 extending out of the fan motor is easily damaged. If damaged, the entire part needs to be replaced. The spline shaft 200 of this application is formed by threading together the rear shaft 210 and the front shaft 220. The rear shaft 210 is inside the fan motor simulator 100 and is not easily damaged. If the front shaft 220 is damaged, it can be directly replaced, saving costs.

[0043] Optionally, the rear axle 210, the front axle 220, and the rear cover 150 are all made of stainless steel.

[0044] The fan impeller 300 is coaxially fixed to the front end of the motor shaft 110.

[0045] Optionally, the fan impeller 300 is made of 6-series aluminum alloy.

[0046] In some embodiments, the front end of the motor shaft 110 is provided with a connecting portion, the rear end of the connecting portion forms an annular stepped surface, and the front end of the connecting portion is provided with a threaded connecting portion. The fan impeller 300 is sleeved on the connecting portion and abuts against the front side of the annular stepped surface. An impeller fixing nut 310 is tightened on the threaded connecting portion, and an impeller washer 320 is provided between the impeller fixing nut 310 and the fan impeller 300. The above-described installation structure of the fan impeller 300 is consistent with the original structure and can meet the requirements of teaching disassembly and assembly.

[0047] Optionally, both the impeller retaining nut 310 and the impeller washer 320 are made of 304 stainless steel.

[0048] The protective cover mounting bracket 400 is used to fix it to the hub of the main wheel.

[0049] Optionally, the protective cover mounting bracket 400 is made of 304 stainless steel.

[0050] The fan cover 500 covers the fan impeller 300 and is fixed on the cover mounting bracket 400. A spline sleeve 510 is provided on the rear side of the center of the fan cover 500. The spline part 221 at the front end of the spline shaft 200 is inserted into the spline sleeve 510.

[0051] In some embodiments, in order to facilitate the connection between the spline sleeve 510 and the fan cover 500, the front end of the spline sleeve 510 is provided with a first connecting piece 511, and the front side of the fan cover 500 is provided with a second connecting piece 520. The first connecting piece 511, the fan cover 500 and the second connecting piece 520 are fixed together by rivets.

[0052] Optionally, the fan cover 500 is made of 304 stainless steel, the spline sleeve 510 and the first connecting piece 511 are made of 304 stainless steel, and the second connecting piece 520 is made of brass.

[0053] The dust cover 600 is located outside the protective cover mounting bracket 400 and fixed on the protective cover mounting bracket 400.

[0054] Optionally, the dust cover 600 is made of 304 stainless steel.

[0055] In some embodiments, the protective cover mounting bracket 400 includes an inner ring portion 410, an outer ring portion 420, and a plurality of spokes 430 connected between the inner ring portion 410 and the outer ring portion 420. The inner ring portion 410 is used to be fixed to the hub of the main wheel by a clamp, and the outer ring portion 420, the fan protective cover 500, and the dust cover 600 are fixedly connected by bolts.

[0056] Optionally, the protective cover mounting bracket 400 is made of 304 stainless steel, and the clamps can be made from recycled aviation materials.

[0057] Preferably, the spokes 430 are 2mm thick, which enhances their strength and makes them less prone to damage during assembly and disassembly.

[0058] Preferably, the inner ring 410 is a one-piece structure. The inner ring of the protective cover mounting bracket for the main wheel brake fan of the original A320 aircraft is a separate design. This application designs it as a one-piece structure to facilitate processing and manufacturing.

[0059] The aircraft main wheel brake fan simulator provided in this application can simulate the original A320 aircraft main wheel brake fan, achieving complete replacement and fully meeting the teaching needs of A320 main wheels, allowing students to effectively practice the complete disassembly and assembly of main wheels.

[0060] The original A320 aircraft's main wheel brake fan has a fan impeller mounted on the motor shaft at the front of the fan motor, and a speed sensor connected to the splined shaft at the rear of the fan motor. Its function is to cool the main wheel and simultaneously calculate the aircraft's actual wheel speed. Since this application is for educational use, focusing solely on practicing the disassembly and assembly of the brake fan, and does not involve disassembling the fan motor or wheel speed sensor, a simplified design has been implemented for the fan motor. This fan motor is installed inside the main wheel axle and appears identical to the original. Therefore, from a training perspective, the effect is the same, thus satisfying disassembly and assembly practice while reducing costs.

[0061] Compared to the original A320 aircraft main wheel brake fan which uses lightweight aluminum alloy, this application replaces frequently disassembled parts with stainless steel, which has high strength and greatly extends the service life of the teaching aid.

[0062] This application reduces the cost of original aviation materials, which used to be worth millions, to several thousand yuan, making the price much lower and significantly reducing costs.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. An aircraft main wheel brake fan simulation teaching aid, characterized in that, include: A fan motor simulator is used to fix the fan motor simulator on the axle of the main wheel. The front end of the fan motor simulator is rotatably provided with a motor shaft, and the motor shaft is provided with a shaft hole. A splined shaft is rotatably mounted inside a fan motor simulator and passes through the central hole of the motor shaft. The front end of the splined shaft is provided with a splined section. A fan impeller, which is coaxially fixed to the front end of the motor shaft; A protective cover mounting bracket is used to fix the protective cover to the hub of the main wheel; A fan protective cover covers the fan impeller and is fixed on a protective cover mounting bracket. A spline sleeve is provided on the rear side of the center of the fan protective cover, and the spline part at the front end of the spline shaft is inserted into the spline sleeve. A dust cover is disposed outside the protective cover mounting bracket and fixed on the protective cover mounting bracket.

2. The aircraft main wheel brake fan simulation teaching aid according to claim 1, characterized in that, The front end of the fan motor simulator is provided with a shaft mounting groove. The rear end of the motor shaft is mounted in the shaft mounting groove through a first bearing. A first limiting part is provided on the outside of the motor shaft, located in front of the first bearing and adapted to the shaft mounting groove. A limiting ring is fixed to the front end of the fan motor simulator by screws, which is sleeved on the outside of the motor shaft and limited to the front of the first limiting part.

3. The aircraft main wheel brake fan simulation teaching aid according to claim 1, characterized in that, The fan motor simulator has an axially penetrating spline shaft hole. The rear end of the spline shaft hole has a limiting groove. The spline shaft is adapted to the spline shaft hole and installed in the limiting groove through a second bearing. The rear end of the spline shaft has a second limiting part adapted to the limiting groove. The rear end of the fan motor simulator has a rear cover that is fixed to the limiting groove by screws.

4. The aircraft main wheel brake fan simulation teaching aid according to claim 3, characterized in that, The splined shaft includes a rear shaft that fits into the splined shaft hole and a front shaft that extends out from the front end of the fan motor simulator. The rear shaft and the front shaft are connected by threads.

5. The aircraft main wheel brake fan simulation teaching aid according to claim 1, characterized in that, The motor shaft has a connecting part at the front end, the rear end of the connecting part forms an annular stepped surface, and the front end of the connecting part has a threaded connecting part. The fan impeller is sleeved on the connecting part and abuts against the front side of the annular stepped surface. An impeller fixing nut is tightened on the threaded connecting part, and an impeller washer is provided between the impeller fixing nut and the fan impeller.

6. The aircraft main wheel brake fan simulation teaching aid according to claim 1, characterized in that, The front end of the spline sleeve is provided with a first connecting piece, and the front side of the fan protective cover is provided with a second connecting piece. The first connecting piece, the fan protective cover and the second connecting piece are fixed together by rivets.

7. The aircraft main wheel brake fan simulation teaching aid according to claim 1, characterized in that, The protective cover mounting bracket includes an inner ring, an outer ring, and multiple spokes connecting the inner ring and the outer ring. The inner ring is used to fix the main wheel hub with a clamp, and the outer ring, the fan protective cover, and the dust cover are fixedly connected by bolts.

8. The aircraft main wheel brake fan simulation teaching aid according to claim 7, characterized in that, The spokes are 2 mm thick.

9. The aircraft main wheel brake fan simulation teaching aid according to claim 7, characterized in that, The inner ring is a one-piece structure.

10. The aircraft main wheel brake fan simulation teaching aid according to any one of claims 1-9, characterized in that, The fan motor simulator and fan impeller are made of aluminum alloy, while the motor shaft, spline shaft, protective cover mounting bracket, fan protective cover, and dust cover are made of stainless steel.

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