Adjustable test reverse thrust cascade

Abstract

An adjustable test reverse thrust cascade is used for enabling the axial length of the cascade to be adjustable. The adjustable test reverse thrust cascade comprises a front edge component, a rear edge component and a plurality of blade units; the front edge component is provided with a rear connecting part on the rear side; the rear edge component is provided with a front connecting part on the front side; each blade unit comprises a blade, the front connecting part is arranged on the front side of the blade unit, and the rear connecting part is arranged on the rear side of the blade unit; wherein the rear connecting part and the front connecting part are connected front and back, so that the front edge component, the plurality of blade units and the rear edge component are connected front and back to form the adjustable test reverse thrust cascade.

Description

Technical Field

[0001] The invention relates to the technical field of reverse thrust of a turbofan engine, and in particular to an adjustable test reverse thrust cascade. Background Art

[0002] In the reverse thrust technology of turbofan engines, the thrust reverser can change the direction of the engine thrust. The thrust reverser deflects the exhaust gas from the engine forward at a certain angle, thereby generating a thrust component in the opposite direction of the normal thrust, thereby achieving the purpose of slowing down the aircraft. The thrust reverser can shorten the aircraft's landing run distance and can also be used as an emergency brake device when the aircraft fails to take off. The thrust reverser cascade is a key component of the thrust reverser to change the direction of the engine exhaust flow.

[0003] Figure 1 It is a partial schematic diagram of a high bypass ratio turbofan engine in the prior art. Figure 2 It is a schematic diagram of blade density parameters of the reverse blade cascade in the prior art. Figure 3 It is a schematic diagram of the structure of the experimental reverse thrust cascade in the prior art.

[0004] like Figure 1 As shown, when the aircraft lands, the thrust reverser works, and the airflow passes through the outer duct 10, and is discharged from the engine through the thrust reverser port 20, the thrust reverser blade cascade flow channel 30, and the thrust reverser port 40. The front end of the thrust reverser is connected to the torque box 50, and the rear end is connected to the blade cascade support ring 60 by fasteners.

[0005] like Figure 2 As shown, the axial length dimension a of the blade cascade remains unchanged, and the blade spacing value b is changed by adjusting the number of blades 80, thereby changing the blade density and thus changing the airflow outlet area.

[0006] Blade density and cascade axial length are key parameters in cascade design, which can be obtained through simulation calculations and finally verified through reverse thrust cascade aerodynamic performance tests. Figure 3 As shown, the existing test thrust reverser cascade is composed of a test fixture 70 and an integral blade cascade 100, and the front and rear ends of the test fixture 70 and the integral blade cascade 100 are connected by fasteners 90. The existing test thrust reverser cascade is an integrated fixed structure and does not have adjustable characteristics. If the thrust reverser cascades of other blade densities and other blade axial lengths are tested, the fasteners 90 need to be removed and the integral blade cascade 100 needs to be replaced as a whole. Therefore, a thrust reverser cascade aerodynamic test can only verify the axial arrangement of a single blade cascade. If the aerodynamic performance of thrust reverser cascades with multiple blade axial arrangements needs to be verified, the integral blade cascade 100 needs to be redesigned and manufactured and then retested, which increases the test cost and prolongs the test cycle, thereby prolonging the entire blade design cycle, which is not conducive to project development. Summary of the invention

[0007] The object of the present invention is to provide an adjustable test thrust reverser blade cascade, which is used to make the axial length of the blade cascade adjustable.

[0008] According to an embodiment of the present invention, an adjustable test thrust reverser cascade includes a leading edge component, a trailing edge component and a plurality of blade units; the leading edge component is provided with a rear connecting portion on the rear side; the trailing edge component is provided with a front connecting portion on the front side; each of the blade units includes a blade, and the front connecting portion is provided on the front side, and the rear connecting portion is provided on the rear side; wherein the rear connecting portion is connected to the front connecting portion front to back, so that the leading edge component, the plurality of blade units and the trailing edge component are connected front to back to form the adjustable test thrust reverser cascade.

[0009] In one or more embodiments, the adjustable test thrust reverser blade grid also includes a bridging unit, wherein the front connecting portion is arranged on the front side of the bridging unit, and the rear connecting portion is arranged on the rear side, and the rear connecting portion is connected to the front connecting portion front to back, so that the leading edge component, the multiple blade units, the trailing edge component, and the bridging unit are connected front to back to form the adjustable test thrust reverser blade grid.

[0010] In one or more embodiments, the front connecting part includes a front hook, and the rear connecting part includes a rear hook, the hook head of the front hook is inserted into the hook groove of the rear hook, and the hook head of the rear hook is inserted into the hook groove of the front hook, so that the rear connecting part is connected to the front connecting part front to back.

[0011] In one or more embodiments, the hook slot of the rear hook opens downward, and the hook head of the rear hook protrudes downward; the hook slot of the front hook opens upward, and the hook head of the front hook protrudes upward.

[0012] In one or more embodiments, the leading edge component is provided with a longitudinal plate protruding backward, and the longitudinal plate of the leading edge component is provided with the rear connecting part of the leading edge component; the trailing edge component is provided with a longitudinal plate protruding forward, and the longitudinal plate of the trailing edge component is provided with the front connecting part of the trailing edge component; each of the blade units is provided with a longitudinal plate, and the blade is located between the two longitudinal plates in the transverse direction, and the longitudinal plate of the blade unit is provided with the front connecting part and the rear connecting part of the blade unit; the rear connecting part is connected to the front connecting part front to back, so that the longitudinal plate of the leading edge component, the longitudinal plates of the multiple blade units, and the longitudinal plate of the trailing edge component are connected front to back to form the longitudinal plate of the adjustable test thrust reverser.

[0013] In one or more embodiments, the leading edge component is provided with a longitudinal plate protruding backward, and the longitudinal plate of the leading edge component is provided with the rear connecting part of the leading edge component; the trailing edge component is provided with a longitudinal plate protruding forward, and the longitudinal plate of the trailing edge component is provided with the front connecting part of the trailing edge component; each of the blade units is provided with a longitudinal plate, and the blade is located between the two longitudinal plates in the transverse direction, and the longitudinal plate of the blade unit is provided with the front connecting part and the rear connecting part of the blade unit; the bridging unit is provided with a longitudinal plate, and the longitudinal plate of the bridging unit is provided with the front connecting part and the rear connecting part of the bridging unit; the rear connecting part is connected to the front connecting part front to back, so that the longitudinal plate of the leading edge component, the longitudinal plates of the multiple blade units, the longitudinal plate of the trailing edge component, and the longitudinal plate of the bridging unit are connected front to back to form the longitudinal plate of the adjustable test thrust reverser blade.

[0014] In one or more embodiments, the trailing edge component includes a plurality of longitudinal plates distributed in a transverse direction, and the longitudinal plates extend rearward to form rib plates.

[0015] In one or more embodiments, the leading edge component includes a plurality of longitudinal plates distributed in a transverse direction.

[0016] In one or more embodiments, each blade unit has a plurality of longitudinal plates distributed in the transverse direction, and two transversely adjacent longitudinal plates are transversely connected through the blade.

[0017] The embodiments of the present invention have at least the following beneficial effects:

[0018] When it is necessary to test thrust reverser blades with other axial lengths, the axial length of the blades can be adjusted by increasing or decreasing the number of blade units. The test operation is simple and there is no need to design, manufacture, or replace multiple integral blades, thereby reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0020] Figure 1 It is a partial schematic diagram of a high bypass ratio turbofan engine in the prior art;

[0021] Figure 2 It is a schematic diagram of blade density parameters of the reverse thrust cascade in the prior art;

[0022] Figure 3 It is a schematic diagram of a test thrust reverser cascade in the prior art;

[0023] Figure 4 An exploded view of the adjustable test thrust reverser cascade of the present invention;

[0024] Figure 5 is an oblique view of the trailing edge component of the present invention;

[0025] Figure 6 is an oblique view of a blade unit in the present invention;

[0026] Figure 7 is an oblique view of the leading edge component of the present invention;

[0027] Figure 8 It is an oblique view of the bridge unit in the present invention.

[0028] Reference numerals:

[0029] 10-external flow channel;

[0030] 20- Anti-thrust port;

[0031] 30- thrust cascade flow passage;

[0032] 40- push out the exit;

[0033] 50-Torque box;

[0034] 60-blade support ring;

[0035] a- axial length of the blade cascade;

[0036] b-blade spacing value;

[0037] 70-Test tooling;

[0038] 80-leaf;

[0039] 90-fastener;

[0040] 100-integral cascade;

[0041] 1- leading edge member;

[0042] 2- trailing edge member;

[0043] 3- Blade unit;

[0044] 4- leading edge strip;

[0045] 5- trailing edge strip;

[0046] 6- rear connection part;

[0047] 7- front connection part;

[0048] 8-leaf;

[0049] 9-Bridge unit;

[0050] 10-longitudinal board;

[0051] 11-rib plate;

[0052] 12-front hook;

[0053] 13- rear hook;

[0054] 14-hook head;

[0055] 15-Hook slot. DETAILED DESCRIPTION

[0056] Reference will now be made in detail to embodiments of the present invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the present invention, not to limit the present invention. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature illustrated or described as part of one embodiment may be used together with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover these modifications and variations within the scope of the appended claims and their equivalents.

[0057] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0058] The terms "first", "second", etc. may be used interchangeably to distinguish one feature from another, and are not intended to mean that each feature must be located as shown in the figures in each embodiment.

[0059] like Figure 4 As shown, the adjustable test thrust reverser cascade comprises a leading edge component 1 , a trailing edge component 2 and a plurality of blade units 3 .

[0060] like Figure 7 As shown, the leading edge component 1 includes a leading edge strip 4, which provides a front connection edge and can be used to connect the torque box, thereby transferring the axial load of the blade cascade to the torque box. The leading edge strip 4 can extend in the transverse direction. The transverse direction is perpendicular to the axial direction, and the same applies below.

[0061] like Figure 5 As shown, the trailing edge member 2 includes a trailing edge strip 5, which provides a rear connection edge and can be used to connect the cascade support ring, thereby transferring the axial load of the cascade to the cascade support ring. The trailing edge strip 5 can extend in the transverse direction.

[0062] like Figure 7 As shown, the leading edge member 1 is provided with a rear connecting portion 6 at the rear side. The rear connecting portion 6 is located at the rear side of the leading edge member 1 and can be located at the rear side of the leading edge strip 4.

[0063] like Figure 5 As shown, the trailing edge member 2 is provided with a front connecting portion 7 at the front side. The front connecting portion 7 is located at the front side of the trailing edge member 2 and can be located at the front side of the trailing edge strip 5.

[0064] like Figure 6 As shown, each blade unit 3 includes a blade 8, and a front connecting portion 7 is provided on the front side, and a rear connecting portion 6 is provided on the rear side. The front connecting portion 7 is located on the front side of the blade unit 3, and can be located on the front side of the blade 8. The rear connecting portion 6 is located on the rear side of the blade unit 3, and can be located on the rear side of the blade 8. Each blade unit 3 can be provided with a single row of transverse blades 8 along the axial direction. Each blade unit 3 can also be provided with multiple rows of transverse blades 8 along the axial direction.

[0065] like Figure 4 As shown, the rear connecting portion 6 is connected to the front connecting portion 7 front to back, so that the leading edge component 1, the plurality of blade units 3, and the trailing edge component 2 are connected front to back to form an adjustable test reverse thrust cascade. The rear connecting portion 6 of the leading edge component 1 is connected to the front connecting portion 7 of the first-stage blade unit 3 front to back, the rear connecting portion 6 of the front-stage blade unit 3 is connected to the front connecting portion 7 of the rear-stage blade unit 3 front to back, and the rear connecting portion 6 of the last-stage blade unit 3 is connected to the front connecting portion 7 of the trailing edge component 2 front to back to form an adjustable test reverse thrust cascade.

[0066] When it is necessary to test other blade axial lengths a( Figure 2 When the reverse thrust cascade is used, the axial length a of the cascade can be adjusted by increasing or decreasing the number of blade units 3. The test operation is simple and there is no need to design, manufacture, or replace multiple integral cascades 100 ( Figure 3 ), reducing the test cost.

[0067] like Figure 8 As shown, the adjustable test thrust reverser cascade may also include a bridge unit 9. The bridge unit 9 is provided with a front connection portion 7 at the front side and a rear connection portion 6 at the rear side. The front connection portion 7 is located at the front side of the bridge unit 9. The rear connection portion 6 is located at the rear side of the bridge unit 9. The rear connection portion 6 is connected to the front connection portion 7 front to back, so that the leading edge component 1, the plurality of blade units 3, the trailing edge component 2, and the bridge unit 9 are connected front to back to form an adjustable test thrust reverser cascade. One or more bridge units 9 may be provided between the leading edge component 1 and the first-stage blade unit 3, the rear connection portion 6 of the leading edge component 1 is connected to the front connection portion 7 of the bridge unit 9 front to back, and the rear connection portion 6 of the bridge unit 9 is connected to the front connection portion 7 of the first-stage blade unit 3 front to back. One or more bridge units 9 may be provided between the front-stage blade unit 3 and the rear-stage blade unit 3, the rear connection portion 6 of the front-stage blade unit 3 is connected to the front connection portion 7 of the bridge unit 9 front to back, and the rear connection portion 6 of the bridge unit 9 is connected to the front connection portion 7 of the rear-stage blade unit 3 front to back. One or more bridge units 9 may be arranged between the last blade unit 3 and the trailing edge member 2, the rear connection portion 6 of the last blade unit 3 is connected to the front connection portion 7 of the bridge unit 9 front to back, and the rear connection portion 6 of the bridge unit 9 is connected to the front connection portion 7 of the trailing edge member 2 front to back. A plurality of bridge units 9 may be arranged continuously, and the rear connection portion 6 of the preceding bridge unit 9 is connected to the front connection portion 7 of the succeeding bridge unit 9 front to back.

[0068] When it is necessary to test other blade axial lengths a( Figure 2 When the thrust reverse blade cascade is provided, the axial length a of the blade cascade can be adjusted by increasing or decreasing the number of bridge units 9 (the number of bridge units 9 can be zero, that is, no bridge unit 9 is provided). The test operation is simple, and there is no need to design, manufacture, or replace multiple integral blade cascades 100 ( Figure 3 ), reducing the test cost.

[0069] When it is necessary to test the thrust reverser cascade of other blade densities, the blade spacing value b can be adjusted by increasing or decreasing the number of bridge units 9 (the number of bridge units 9 can be zero, that is, no bridge unit 9 is set) Figure 2 As shown in the figure, the blade density is adjusted, and the test operation is simple, and there is no need to design, manufacture, or replace multiple integral blade cascades 100 ( Figure 3 In addition, the blade density can be adjusted by increasing or decreasing the number of bridge units 9 without changing the axial length a of the blade cascade, and there is no need to disassemble the leading edge component 1 and the trailing edge component 2, so the test operation is simple.

[0070] like Figure 7 As shown, the leading edge member 1 may be provided with a longitudinal plate 10 protruding backward. The longitudinal plate 10 of the leading edge member 1 may be located at the rear side of the leading edge strip 4 and protrude backward from the leading edge strip 4. The longitudinal plate 10 may be perpendicular to the transverse direction and parallel to the axial direction in the longitudinal direction, and the same shall apply below. The longitudinal plate 10 of the leading edge member 1 is provided with the rear connecting portion 6 of the leading edge member 1.

[0071] like Figure 5 As shown, the trailing member 2 may be provided with a longitudinal plate 10 protruding forward. The longitudinal plate 10 of the trailing member 2 may be located in front of the trailing edge strip 5 and protrude forward from the trailing edge strip 5. The longitudinal plate 10 may be perpendicular to the lateral direction. The longitudinal plate 10 of the trailing member 2 is provided with the front connecting portion 7 of the trailing member 2.

[0072] like Figure 6 As shown, each blade unit 3 may be provided with a longitudinal plate 10. The blade 8 is located between the two longitudinal plates 10 in the transverse direction, and the longitudinal plate 10 of the blade unit 3 may protrude forward and backward from the blade 8. The longitudinal plate 10 may be perpendicular to the transverse direction. The longitudinal plate 10 of the blade unit 3 is provided with a front connecting portion 7 and a rear connecting portion 6 of the blade unit 3, the front connecting portion 7 being provided at the portion of the longitudinal plate 10 protruding forward relative to the blade 8, and the rear connecting portion 6 being provided at the portion of the longitudinal plate 10 protruding backward relative to the blade 8.

[0073] like Figure 4As shown, the rear connecting portion 6 is connected to the front connecting portion 7 front to back, and the longitudinal plate 10 of the leading edge component 1, the longitudinal plates 10 of the plurality of blade units 3, and the longitudinal plate 10 of the trailing edge component 2 are connected to each other front to back to form the longitudinal plate of the adjustable test thrust reverser cascade. The rear connecting portion 6 of the leading edge component 1 is connected to the front connecting portion 7 of the first-stage blade unit 3 front to back, so that the longitudinal plate 10 of the leading edge component 1 and the longitudinal plate 10 of the first-stage blade unit 3 are connected to each other front to back to form a longitudinal plate extending in the longitudinal direction. The rear connecting portion 6 of the front-stage blade unit 3 and the front connecting portion 7 of the rear-stage blade unit 3 are connected to each other front to back to form a longitudinal plate extending in the longitudinal direction. The rear connecting portion 6 of the last-stage blade unit 3 is connected to the front connecting portion 7 of the trailing edge component 2 front to back, so that the longitudinal plate 10 of the last-stage blade unit 3 and the longitudinal plate 10 of the trailing edge component 2 are connected to each other front to back to form a longitudinal plate extending in the longitudinal direction. The front connecting portion 7 and / or the rear connecting portion 6 are arranged on the longitudinal plate 10 of the leading edge component 1, the blade unit 3, and the trailing edge component 2. The rear connecting portion 6 and the front connecting portion 7 are connected front to back so that the rear connecting portion 6 and the front connecting portion 7 become part of the longitudinal plate of the adjustable test reverse thrust blade, thereby avoiding the rear connecting portion 6 and the front connecting portion 7 from becoming redundant structures that affect the aerodynamic performance of the adjustable test reverse thrust blade.

[0074] like Figures 4 to 7 As shown, the transverse widths of the longitudinal plates 10 of the leading edge component 1, the blade unit 3, and the trailing edge component 2 can be the same, and the longitudinal plates of the adjustable test thrust reverser cascade formed by connecting front and back have a uniform transverse width.

[0075] like Figures 4 to 7 As shown, for the leading edge component 1, the blade unit 3, and the trailing edge component 2, the lateral width of the rear connecting portion 6 and / or the front connecting portion 7 may be the same as the lateral width of the longitudinal plate 10, and the rear connecting portion 6 and the front connecting portion 7 may be regarded as being formed by extending and expanding the longitudinal plate 10 in a plane, so that the rear connecting portion 6 and the front connecting portion 7 connected front and rear become part of the longitudinal plate of the adjustable test reverse thrust blade.

[0076] like Figure 8As shown, the bridge unit 9 can be provided with a longitudinal plate 10. The longitudinal plate 10 can be perpendicular to the horizontal direction. The longitudinal plate 10 of the bridge unit 9 is provided with a front connection part 7 and a rear connection part 6 of the bridge unit 9, the front connection part 7 is arranged on the front side of the longitudinal plate 10, and the rear connection part 6 is arranged on the rear side of the longitudinal plate 10. The rear connection part 6 is connected to the front connection part 7 front and back, and the longitudinal plate 10 of the leading edge component 1, the longitudinal plates 10 of the plurality of blade units 3, the longitudinal plates 10 of the trailing edge component 2, and the longitudinal plates 10 of the bridge unit 9 are connected front and back to form a longitudinal plate of an adjustable test reverse thrust cascade. When the rear connection part 6 of the leading edge component 1 is connected to the front connection part 7 of the bridge unit 9 front and back, the longitudinal plate 10 of the leading edge component 1 and the longitudinal plate 10 of the bridge unit 9 are connected front and back to form a longitudinal plate extending in the longitudinal direction. When the rear connection portion 6 of the bridge unit 9 is connected to the front connection portion 7 of the rear blade unit 3, the longitudinal plate 10 of the bridge unit 9 is connected to the longitudinal plate 10 of the rear blade unit 3 to form a longitudinal plate extending in the longitudinal direction. When the rear connection portion 6 of the front blade unit 3 is connected to the front connection portion 7 of the bridge unit 9, the longitudinal plate 10 of the front blade unit 3 is connected to the longitudinal plate 10 of the bridge unit 9 to form a longitudinal plate extending in the longitudinal direction. When the rear connection portion 6 of the bridge unit 9 is connected to the front connection portion 7 of the trailing edge component 2, the longitudinal plate 10 of the bridge unit 9 is connected to the longitudinal plate 10 of the trailing edge component 2 to form a longitudinal plate extending in the longitudinal direction. When the rear connection portion 6 of the front bridge unit 9 is connected to the front connection portion 7 of the rear bridge unit 9, the longitudinal plate 10 of the front bridge unit 9 is connected to the longitudinal plate 10 of the rear bridge unit 9 to form a longitudinal plate extending in the longitudinal direction. The front connecting portion 7 and / or the rear connecting portion 6 are arranged on the longitudinal plate 10 of the leading edge component 1, the blade unit 3, the trailing edge component 2, and the bridging unit 9. The rear connecting portion 6 and the front connecting portion 7 are connected front to back so that the rear connecting portion 6 and the front connecting portion 7 become part of the longitudinal plate of the adjustable test reverse thrust blade, thereby avoiding the rear connecting portion 6 and the front connecting portion 7 from becoming redundant structures that affect the aerodynamic performance of the adjustable test reverse thrust blade.

[0077] like Figures 4 to 8 As shown, the longitudinal plates 10 of the bridge unit 9 and the longitudinal plates 10 of the leading edge component 1, the blade unit 3, and the trailing edge component 2 may have the same transverse width, and the longitudinal plates of the adjustable test thrust reverser cascade formed by connecting front and back have a uniform transverse width.

[0078] like Figure 8 As shown, for the bridging unit 9, the lateral widths of the rear connecting portion 6 and the front connecting portion 7 may be the same as the lateral width of the longitudinal plate 10, and the rear connecting portion 6 and the front connecting portion 7 may be regarded as being formed by extending and expanding the longitudinal plate 10 in a plane, thereby making the rear connecting portion 6 and the front connecting portion 7 connected front and rear become part of the longitudinal plate of the adjustable test reverse thrust blade.

[0079] like Figure 5As shown, the trailing edge member 2 may have a plurality of longitudinal plates 10 distributed in the transverse direction. Two longitudinal plates 10 may be arranged at both ends of the transverse direction to form side plates, forming a frame of the adjustable test reverse thrust cascade. The remaining longitudinal plates 10 may be arranged between the two longitudinal plates 10 in the transverse direction to form partitions, forming a partition frame of the adjustable test reverse thrust cascade. The longitudinal plates 10 may extend backward to form ribs 11. The ribs 11 may be distributed on the upper surface of the trailing edge strip 5. The ribs 11 may be perpendicular to the transverse direction.

[0080] like Figure 7 As shown, the leading edge member 1 may have a plurality of longitudinal plates 10 distributed in the transverse direction. Two longitudinal plates 10 may be arranged at both ends in the transverse direction to form side plates, forming the frame of the adjustable test reverse thrust cascade. The remaining longitudinal plates 10 may be arranged between the two longitudinal plates 10 in the transverse direction to form partition plates, forming the partition frame of the adjustable test reverse thrust cascade.

[0081] like Figure 6 As shown, each blade unit 3 may have a plurality of longitudinal plates 10 distributed in the transverse direction, and two transversely adjacent longitudinal plates 10 are transversely connected through blades 8. Two longitudinal plates 10 may be arranged at both ends of the transverse direction to form side plates, forming the frame of the adjustable test reverse thrust cascade. The remaining longitudinal plates 10 are arranged between the two longitudinal plates 10 in the transverse direction to form partitions, forming the partition frame of the adjustable test reverse thrust cascade.

[0082] like Figure 8 As shown, the bridging unit 9 may include a longitudinal plate 10 in the transverse direction. When configuring the bridging unit 9, multiple bridging units 9 are arranged in a row in the transverse direction to bridge multiple longitudinal plates 10 distributed in the transverse direction of the leading edge component 1, the blade unit 3, and the trailing edge component 2.

[0083] like Figures 4 to 8 As shown, the front connecting portion 7 may include a front hook 12. The front hook 12 may be located at the front side of the longitudinal plate 10. The front hook 12 may protrude forward from the longitudinal plate 10 and may be perpendicular to the transverse direction. The transverse width of the front hook 12 may be the same as the transverse width of the longitudinal plate 10, and the front hook 12 may be regarded as being formed by the longitudinal plate 10 extending and expanding in a plane, thereby becoming a part of the longitudinal plate of the adjustable test reverse thrust cascade formed by connecting front and back. The rear connecting portion 6 may include a rear hook 13. The rear hook 13 may be located at the rear side of the longitudinal plate 10. The rear hook 13 may protrude backward from the longitudinal plate 10 and may be perpendicular to the transverse direction. The transverse width of the rear hook 13 may be the same as the transverse width of the longitudinal plate 10, and the rear hook 13 may be regarded as being formed by the longitudinal plate 10 extending and expanding in a plane, thereby becoming a part of the longitudinal plate of the adjustable test reverse thrust cascade formed by connecting front and back.

[0084] like Figure 4As shown, the hook head 14 of the front hook 12 is inserted into the hook groove 15 of the rear hook 13, and the hook head 14 of the rear hook 13 is inserted into the hook groove 15 of the front hook 12, so that the rear connecting part 6 and the front connecting part 7 are connected front and back. The hook head 14 of the front hook 12 and the hook groove 15 of the rear hook 13 may have complementary shapes and sizes. When connected, the hook head 14 of the front hook 12 fills the hook groove 15 of the rear hook 13 to avoid forming holes and seams, which affect the aerodynamic performance of the longitudinal plate of the adjustable test reverse thrust cascade formed by the front and back connection. The hook head 14 of the rear hook 13 and the hook groove 15 of the front hook 12 may have complementary shapes and sizes. When connected, the hook head 14 of the rear hook 13 fills the hook groove 15 of the front hook 12 to avoid forming holes and seams, which affect the aerodynamic performance of the longitudinal plate of the adjustable test reverse thrust cascade formed by the front and back connection.

[0085] like Figures 4 to 8 As shown, the upper and lower edges of the front hook 12 and the rear hook 13 can be flush with the upper and lower edges of the longitudinal plate 10 to avoid the formation of convex humps and concave pits that affect the aerodynamic performance of the longitudinal plates of the adjustable test reverse thrust cascade formed by the front and rear connections.

[0086] like Figures 4 to 8 As shown, the front hook 12 and the rear hook 13 can have the same shape and size, and only have different positions. The hook head 14 of the front hook 12 corresponds to the hook groove 15 of the rear hook 13, and the hook groove 15 of the front hook 12 corresponds to the hook head 14 of the rear hook 13, so as to achieve the snap connection. For example, in the embodiment shown in the figure, the front hook 12 and the rear hook 13 are centrally symmetrical. This makes the design, manufacture, disassembly and arrangement simpler.

[0087] like Figures 4 to 8 As shown, the hook groove 15 of the front hook 12 may open upward and have a rectangular accommodation space, and the hook head 14 of the front hook 12 may protrude upward and have a rectangular outline. The lower edge of the front hook 12 may be flush with the lower edge of the longitudinal plate 10. The hook groove 15 of the rear hook 13 may open downward and have a rectangular accommodation space, and the hook head 14 of the rear hook 13 may protrude downward and have a rectangular outline. The upper edge of the rear hook 13 may be flush with the upper edge of the longitudinal plate 10.

[0088] A variety of blade units 3 can be designed and manufactured. The front connecting parts 7 and rear connecting parts 6 of different blade units 3 have different forward and backward protruding lengths. Replacing different blade units 3 can adjust the axial length a of the cascade and the blade density, and the test operation is simple. In addition, the axial length a of the cascade can be adjusted while replacing different blade units 3 to adjust the blade density, and there is no need to disassemble the leading edge component 1 and the trailing edge component 2, so the test operation is simple. The different forward and backward protruding lengths of the front connecting parts 7 and the rear connecting parts 6 of different blade units 3 can be achieved by lengthening or shortening the protruding lengths of the front hook 12 and the rear hook 13.

[0089] Although the present invention is disclosed as above by the embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention.

Claims

1. An adjustable test thrust reverser cascade, characterized in that include: A leading edge member having a rear connection portion disposed at a rear side; A trailing edge member having a front connecting portion disposed at the front side; as well as A plurality of blade units, each of the blade units comprises a blade, and the front connecting portion is arranged at the front side, and the rear connecting portion is arranged at the rear side; in, The rear connecting portion is connected to the front connecting portion front to back, so that the leading edge component, the plurality of blade units, and the trailing edge component are connected front to back to form the adjustable test thrust reverser cascade.

2. The adjustable test thrust reverser cascade according to claim 1, characterized in that: The adjustable test thrust reverser blade grid also includes a bridging unit, wherein the front connecting portion is arranged at the front side of the bridging unit, and the rear connecting portion is arranged at the rear side, and the rear connecting portion is connected to the front connecting portion front to back, so that the leading edge component, the multiple blade units, the trailing edge component, and the bridging unit are connected front to back to form the adjustable test thrust reverser blade grid.

3. The adjustable test thrust reverser cascade according to claim 1 or 2, characterized in that: The front connecting part includes a front hook, and the rear connecting part includes a rear hook. The hook head of the front hook is inserted into the hook groove of the rear hook, and the hook head of the rear hook is inserted into the hook groove of the front hook, so that the rear connecting part is connected to the front connecting part front to back.

4. The adjustable test thrust reverser cascade according to claim 3, characterized in that: The hook groove of the rear hook opens downward, and the hook head of the rear hook protrudes downward; The hook groove of the front hook opens upward, and the hook head of the front hook protrudes upward.

5. The adjustable test thrust reverser cascade according to claim 1, characterized in that: The front edge member is provided with a longitudinal plate protruding rearward, and the longitudinal plate of the front edge member is provided with a rear connecting portion of the front edge member; The trailing edge member is provided with a longitudinal plate protruding forward, and the longitudinal plate of the trailing edge member is provided with a front connecting portion of the trailing edge member; Each of the blade units is provided with a longitudinal plate, the blade is located between the two longitudinal plates in the transverse direction, and the longitudinal plate of the blade unit is provided with a front connecting portion and a rear connecting portion of the blade unit; The rear connecting part is connected to the front connecting part front to back, so that the longitudinal plate of the leading edge component, the longitudinal plates of the plurality of blade units and the longitudinal plate of the trailing edge component are connected front to back to form the longitudinal plate of the adjustable test thrust reverser cascade.

6. The adjustable test thrust reverser cascade according to claim 2, characterized in that: The front edge member is provided with a longitudinal plate protruding rearward, and the longitudinal plate of the front edge member is provided with a rear connecting portion of the front edge member; The trailing edge member is provided with a longitudinal plate protruding forward, and the longitudinal plate of the trailing edge member is provided with a front connecting portion of the trailing edge member; Each of the blade units is provided with a longitudinal plate, the blade is located between the two longitudinal plates in the transverse direction, and the longitudinal plate of the blade unit is provided with a front connecting portion and a rear connecting portion of the blade unit; The bridge unit is provided with a longitudinal plate, and the longitudinal plate of the bridge unit is provided with a front connecting part and a rear connecting part of the bridge unit; The rear connecting part is connected to the front connecting part front to back, so that the longitudinal plate of the leading edge component, the longitudinal plates of the plurality of blade units, the longitudinal plate of the trailing edge component and the longitudinal plate of the bridging unit are connected front to back to form the longitudinal plate of the adjustable test reverse thrust cascade.

7. The adjustable test thrust reverser cascade according to claim 5 or 6, characterized in that: The trailing edge component has a plurality of longitudinal plates distributed in a transverse direction, and the longitudinal plates extend rearward to form rib plates.

8. The adjustable test thrust reverser cascade according to claim 5 or 6, characterized in that: The front edge component has a plurality of longitudinal plates distributed in a lateral direction.

9. The adjustable test thrust reverser cascade according to claim 5 or 6, characterized in that: Each blade unit has a plurality of longitudinal plates distributed in a transverse direction, and two transversely adjacent longitudinal plates are transversely connected through the blade.

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