Aero-engine mounting test bed adaptive to two-dimensional overturning motion

Abstract

The application provides an aero-engine mounting bench adapting to two-dimensional overturning motion, which comprises an upper aero-engine nacelle support frame and a lower aero-engine nacelle support frame, an air inlet channel support fixedly connected with a main frame, the main frame being fixedly connected with a fixed bench of an open-air test bench, the main frame being internally provided with an engine auxiliary support, an engine main support mounted on the main frame, the engine main support comprising a sleeve, a main pin shaft, a cover plate, a sleeve nut, a tensioning screw rod, an adjusting connecting rod and connecting bolts, the sleeve being fixed on a cross beam at the lower side of the main frame, the main pin shaft being inserted into the sleeve, the cover plate being arranged at the left side of the sleeve and being fixedly connected with the cross beam of the main frame through the connecting bolts, the sleeve nut being matched with the external thread at the end of the main pin shaft, the tensioning screw rod being arranged in the main pin shaft and being connected with the engine, the adjusting connecting rod being arranged in the main pin shaft and being connected with the tensioning screw rod, the tensioning screw rod being synchronously rotated by rotating the adjusting connecting rod, and the engine being tightly fixed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of aero-engine test, and particularly relates to an aero-engine mounting rack adapting to two-dimensional overturning motion. BACKGROUND

[0002] An aero-engine needs to be tested in the open air. Before the aero-engine is installed on an open-air test rack, the engine needs to be installed on a mounting rack in a factory building, and then the mounting rack and the engine are transported together to the open-air test rack, and the mounting rack and the fixed rack of the open-air test rack are fixedly connected. The mounting rack is used to fix the engine and can be connected with the fixed rack. Some open-air test racks need to perform multi-dimensional overturning motion, such as an attitude test rack which needs to realize two-dimensional overturning motion of roll and pitch. Therefore, the mounting rack needs to meet the requirements of engine installation and fixation and adapt to multi-dimensional overturning motion test conditions.

[0003] The existing mounting structure of the engine mounting rack and the engine, and the connection structure of the mounting rack and the fixed rack cannot adapt to overturning motion, especially for the attitude test which needs to perform two-dimensional overturning motion of roll and pitch. The existing fixed rack cannot meet the requirements. SUMMARY

[0004] The present application aims to provide an aero-engine mounting rack adapting to two-dimensional overturning motion, so as to solve or alleviate at least one problem in the background art.

[0005] The technical solution of the present application is: an aero-engine mounting rack adapting to two-dimensional overturning motion, comprising:

[0006] An upper-mounted flying case support frame and a lower-mounted flying case support frame respectively adapted to an upper-mounted flying case installation form and a lower-mounted flying case installation form, one of the upper-mounted flying case support frame and the lower-mounted flying case support frame being fixedly connected with a main frame;

[0007] An air inlet duct support for supporting an air inlet duct when the air inlet duct is installed, the air inlet duct support being fixedly connected with the main frame;

[0008] A main frame fixedly connected with a fixed rack of an open-air test rack, the main frame being internally provided with an engine auxiliary support for assisting the fixation of the engine;

[0009] The engine main support installed on the main frame for connecting with the engine comprises a sleeve, a main pin shaft, a cover plate, a sleeve nut, a tensioning screw, an adjusting connecting rod and connecting bolts, the sleeve is fixed on the crossbeam on the lower side of the main frame, the main pin shaft is inserted into the sleeve, the cover plate is arranged on the side of the sleeve away from the engine and is fixedly connected with the crossbeam of the main frame through the connecting bolts, the sleeve nut is matched with the external thread on the end of the main pin shaft to connect the main pin shaft, the cover plate and the crossbeam of the main frame into an integral whole, the center of the axis of the main pin shaft is provided with a stepped hole, the tensioning screw is arranged in the stepped hole on the side of the main pin shaft and is connected with the engine structure, the adjusting connecting rod is arranged in the stepped hole on the other side of the main pin shaft and is connected with the tensioning screw, the tensioning screw can be synchronously rotated by rotating the adjusting connecting rod, and then the engine is fixedly pulled by the tensioning screw.

[0010] In the optional embodiment of the present application, the main frame is a semicircular frame structure as a whole, the main frame is provided with rollers at the bottom and a plurality of lifting lugs distributed on the main frame, so that the overall movement under the condition of complete installation of the engine, the air inlet and the nacelle is realized.

[0011] In the optional embodiment of the present application, the front end surface of the lower crossbeam of the main frame is provided with a fixed gantry mounting plate, the main frame is connected with the fixed gantry of the open-air test bed through the fixed gantry mounting plate and bears the engine thrust.

[0012] In the optional embodiment of the present application, the rear side of the main frame is provided with an auxiliary mounting plate, so as to ensure the stable support of the mounting gantry.

[0013] In the optional embodiment of the present application, the auxiliary support is a two-way adjusting pull rod mechanism, the engine is pulled tightly by adjusting the length of the pull rod.

[0014] In the optional embodiment of the present application, the side of the sleeve away from the engine is provided with a groove, the position of the main pin shaft matched with the groove is provided with a guide protrusion, the correct installation of the main pin shaft and the sleeve in the angular direction is ensured through the cooperation of the groove and the guide protrusion.

[0015] In the optional embodiment of the present application, an adjusting plate is arranged between the crossbeam and the cover plate of the main frame, so as to adjust the extension distance of the main pin shaft.

[0016] In the optional embodiment of the present application, the tensioning screw is provided with an internal hexagonal structure at one end and a threaded structure connected with the engine structure at the other end.

[0017] The extension end of the adjusting connecting rod is provided with a hexagonal head structure, and the hexagonal head structure of the adjusting connecting rod is matched with the internal hexagonal structure of the tensioning screw.

[0018] The main support structure of the installation rack and the installation structure of the fixed rack of the test bed are improved, so that the engine installation rack can meet the test requirements of the roll and pitch two-dimensional overturning motion, and the structure is more compact and more suitable for the engine upper installation of the closed structure fixed rack. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions provided by the present application, the following will briefly introduce the drawings. Obviously, the drawings described below are only some embodiments of the present application.

[0020] Figure 1 The figure is a schematic diagram of the engine installation rack structure (upper engine nacelle support frame) of the present application.

[0021] Figure 2 The figure is a top view of the engine installation rack structure of the present application.

[0022] Figure 3 The figure is a schematic diagram of the engine installation rack structure (lower engine nacelle support frame) of the present application.

[0023] Figure 4 The figure is a view based on A-A in Figure 1 .

[0024] Figure 5 The figure is a view based on B-B in Figure 1 .

[0025] Figure 6 The figure is a view based on C-C in Figure 1 .

[0026] Figure 7 The figure is a view based on D-D in Figure 1 .

[0027] Figure 8 The figure is a view based on E-E in Figure 3 .

[0028] Figure 9 The figure is a schematic diagram of the engine main support structure of the present application.

[0029] Figure 10 The figure is a view based on F-F in Figure 9 .

[0030] Figure 11 The figure is a view based on G-G in Figure 9 .

[0031] Figure 12 The figure is a view based on P in the engine main support structure of the present application.

[0032] REFERENCE SIGNS:

[0033] 1- Upper-mounted flight attachment casing support frame;

[0034] 2-Intake duct support frame

[0035] 3-Engine Main Support

[0036] 31-Sleeve

[0037] 32-Main Pin Shaft

[0038] 33-Cover plate

[0039] 34-Adjustment Plate

[0040] 35-outer nut

[0041] 36-Tightening screw

[0042] 37-Adjusting Link

[0043] 38-Connecting Bolt

[0044] 4-Main Frame

[0045] 41-Roller

[0046] 42-Hanging Ear

[0047] 43-Engine Auxiliary Support

[0048] 44-Fixed stand mounting plate

[0049] 45-Auxiliary mounting plate

[0050] 5-Measurement and Control Equipment Box

[0051] 6-Lower-mounted flight attachment casing support frame Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings.

[0053] This application improves the existing main support structure of the mounting platform and the mounting structure connected to the fixed platform, enabling it to meet the test requirements for roll and pitch rotation movements.

[0054] like Figures 1 to 8 As shown, the aircraft engine mounting stand adapted to two-dimensional flipping motion provided in this application mainly includes: an upper flight attachment casing support frame 1, a lower flight attachment casing support frame 6, an air intake support frame 2, an engine main support 3, and a main frame 4.

[0055] The upper-mounted airborne casing support frame 1 and the lower-mounted airborne casing support frame 6 are respectively adapted to the installation forms of the upper-mounted airborne casing and the lower-mounted airborne casing. They are fixed on the main frame 4 and the air intake bracket 2, but are not installed at the same time.

[0056] The intake duct bracket 2 is fixedly connected to the main frame 4. An intake duct support device is installed on the intake duct bracket 2 to support the intake duct during installation.

[0057] The main frame 4 is a semi-circular frame structure with rollers 41 at its bottom and multiple lifting lugs 42 distributed on the frame, enabling the main frame 4 to move and lift, allowing for overall movement even with the engine, air intake, and fuselage casing fully installed, facilitating installation. A fixed mounting plate 44 is installed on the front end of the lower crossbeam of the main frame 4 for connecting to a fixed mounting frame (not shown) on the open-air test stand and bearing the engine thrust. An auxiliary mounting plate 45 is installed on the rear side of the main frame 4 to ensure the stability of the mounting frame.

[0058] In addition, control and measurement equipment boxes 5 are installed on both sides of the main frame 4, and an engine auxiliary support 43 is provided on the inner rear end of the main frame 4. The engine auxiliary support 43 can assist in fixing the engine. In some embodiments of this application, the auxiliary support 43 is a bidirectional adjustable tie rod mechanism, and the engine can be tightened by adjusting the length of the tie rod.

[0059] In some embodiments of this application, the upper air attachment casing support frame 1, the lower air attachment casing support frame 6, the air intake bracket 2, and the main frame 4 are all frame structures made of square tubes.

[0060] The engine main support 3 passes through the crossbeam on the lower side of the main frame 4 and is installed on the main frame 4 to connect with the engine and provide support for the engine.

[0061] like Figures 9 to 12 As shown, the engine main support 3 includes: sleeve 31, main pin 32, cover plate 33, adjusting plate 34, outer nut 35, tensioning screw 36, adjusting connecting rod 37 and connecting bolt 38.

[0062] Sleeve 31 is welded and fixed to the crossbeam on the lower side of the main frame 4. The main pin 32 is inserted into sleeve 31, with sleeve 31 located away from the engine side. Figure 9 The left side of the main pin 32 has a groove, and the main pin 32 has a guide protrusion at the position that matches the groove. The two work together to ensure that the main pin 32 and the sleeve 31 are correctly installed in the angular direction.

[0063] The inner side (near the engine) of the main pin 32 has a tapered outer surface, the outer side (away from the engine) has an external thread, the middle outer surface has a straight structure, and the center of the main pin 32 has a stepped hole structure.

[0064] Cover plate 33 is arranged outside sleeve 31, and is fixedly connected with the cross beam of main frame 4 through connecting bolt 38, and main pin shaft 32, cover plate 33 and the cross beam of main frame 4 are connected into an integrated whole through outer sleeve nut 35 matched with the outer thread of the outer side of main pin shaft 32.

[0065] In some embodiments of the present application, adjusting plate 34 can be arranged between the cross beam of main frame 4 and cover plate 33, for adjusting the extension distance of main pin shaft 32. Further, a jackscrew hole can be arranged on cover plate 33, for facilitating the disassembly of main pin shaft 32.

[0066] Tensioning screw 36 is arranged in the small hole on the right side of the stepped hole of main pin shaft 32, and the outer side head is an inner hexagonal structure, and the inner side part is a threaded structure, which can be connected with the engine structure. Adjustment connecting rod 37 is arranged in the large hole on the left side of the stepped hole of main pin shaft 32, and the extension end is a hexagonal head structure. The hexagonal head structure of adjustment connecting rod 37 is matched with the inner hexagonal structure of tensioning screw 36, and by rotating adjustment connecting rod 37, tensioning screw 36 can be synchronously rotated, and the engine is fixedly pulled by the thread on the other end of tensioning screw 36 (one side of the two main supports of the engine is pulled tightly, and the other side is transversely free).

[0067] It should be noted that by adjusting the size of main pin shaft 32, engine main support 3 can adapt to different engines.

[0068] The main support structure of the installation rack and the installation structure of the fixed rack of the test bed are improved in the present application, so that the engine installation rack can meet the test requirements of the horizontal roll and the pitching two-dimensional overturning motion, and the structure is more compact, and can better adapt to the engine on-rack installation of the closed structure fixed rack.

[0069] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements easily thought of by those skilled in the art within the technical range disclosed in the present application should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An aeroengine mounting test bed which accommodates two dimensional roll motion, characterised in that, The utility model relates to a kind of engine test stand, including: Upper engine nacelle support frame (1) and lower engine nacelle support frame (6) respectively adapted to upper engine nacelle and lower engine nacelle installation form, one of upper engine nacelle support frame (1) and lower engine nacelle support frame (6) is fixedly connected with main frame (4); Air inlet duct support (2) for supporting air inlet duct when installing air inlet duct, the air inlet duct support (2) is fixedly connected with main frame (4); Main frame (4) is fixedly connected with fixed bed of open-air test bed, and the inside of main frame (4) is equipped with engine auxiliary support (43), for assisting the fixation of engine; Engine main support (3) for being connected with engine is installed on main frame (4), and the engine main support (3) includes sleeve (31), main pin shaft (32), cover plate (33), outer sleeve nut (35), tensioning screw rod (36), adjusting connecting rod (37) and connecting bolt (38), the sleeve (31) is fixed on the crossbeam of the lower side of main frame (4), the main pin shaft (32) is inserted into sleeve (31), the cover plate (33) is arranged on the side, away from engine, of sleeve (31), and is fixedly connected with the crossbeam of main frame (4) by connecting bolt (38), the outer sleeve nut (35) is cooperated with the outer thread of the end of main pin shaft (32) to connect main pin shaft (32), cover plate (33) and the crossbeam of main frame (4) into an integral whole, the axis center of main pin shaft (32) is equipped with stepped hole, the tensioning screw rod (36) is arranged in the stepped hole of one side of main pin shaft (32) and is connected with engine structure, the adjusting connecting rod (37) is arranged in the stepped hole of the other side of main pin shaft (32), and the adjusting connecting rod (37) is connected with the tensioning screw rod (36), by rotating adjusting connecting rod (37), the tensioning screw rod (36) can be rotated synchronously, and then engine is fixedly pulled by tensioning screw rod (36).

2. The aeroengine mounting test bed accommodating two dimensional flip motions as claimed in claim 1, wherein, The main frame (4) is semicircular frame structure as a whole, the bottom of main frame (4) is provided with roller (41) and is distributed with multiple lifting lugs (42) on main frame, for realizing integral movement under the condition of complete installation of engine, air inlet duct and engine nacelle.

3. The aeroengine mounting test bed accommodating two-dimensional flip motion according to claim 2, characterized in that, The front end surface of the lower crossbeam of main frame (4) is provided with fixed bed mounting plate (44), and main frame (4) is connected with the fixed bed of open-air test bed through fixed bed mounting plate (44) and bears engine thrust.

4. The aeroengine mounting test bed accommodating two dimensional roll motion as claimed in claim 3 wherein, The rear side of main frame (4) is provided with auxiliary mounting plate (45), for ensuring the stable support of installation bed.

5. The aeroengine mounting test bed accommodating two dimensional flip motions as claimed in claim 1, wherein, The auxiliary support (43) is two-way adjusting tension rod mechanism, and the engine is pulled by adjusting the length of tension rod.

6. The aeroengine mounting test bed accommodating two dimensional roll motion as claimed in claim 1 wherein, The side, away from engine, of sleeve (31) is provided with recess, and the position of main pin shaft (32) adapted to recess is provided with guide protrusion, and the cooperation of recess and guide protrusion ensures that the angular position of main pin shaft (32) and sleeve (31) is correctly installed.

7. The aeroengine mounting test bed accommodating two dimensional flip motions as claimed in claim 1, wherein, Adjusting plate (34) is arranged between the crossbeam of main frame (4) and cover plate (33), for adjusting the extension distance of main pin shaft (32).

8. The aeroengine mounting test bed accommodating two dimensional flip motions as claimed in claim 1, wherein, The tensioning screw (36) is provided with an inner hexagonal structure at one end and a threaded structure connected with the engine structure at the other end. The extension end of the adjusting connecting rod (37) is provided with a hexagonal head structure, and the hexagonal head structure of the adjusting connecting rod (37) cooperates with the inner hexagonal structure of the tensioning screw (36).

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