Supporting device for engine combustion chamber test piece

Abstract

The invention provides a supporting device for an engine combustion chamber test piece. The supporting device comprises a frame, a connecting structure and a supporting structure, wherein the connecting structure and the supporting structure are arranged on the frame; the connecting structure is connected with a connecting lug of the combustion chamber test piece, so that the connecting structure can support the upstream position of the combustion chamber test piece; the combustion chamber test piece is pressed against the supporting structure, so that the supporting structure can support the downstream position of the combustion chamber test piece; an elastic supporting piece is arranged in the supporting structure, and the elastic supporting piece can absorb vibration of the combustion chamber test piece in the radial direction; the supporting structure is provided with a sliding piece, and the combustion chamber test piece can be supported on the sliding piece in a sliding mode so as to transmit displacement of the combustion chamber test piece in the axial direction. The supporting device can absorb displacement in the axial direction and the radial direction.

Description

Technical Field

[0001] This invention relates to aircraft engine combustion chamber testing, and more particularly to a support device for an engine combustion chamber test piece. Background Technology

[0002] In the performance testing of aero-engine and gas turbine combustors, the combustor test specimen needs to be placed on a test rig, which is usually a flat, hardened surface or platform. Taking a full-ring combustor test specimen as an example, the specimen typically weighs between 2 and 5 tons. To ensure the stability of the specimen on the rig, necessary support structures are required to provide support and restraint. During performance testing, the combustor test specimen will experience thermal stress due to temperature changes, and aerodynamic forces will cause vibration and axial stress.

[0003] However, current combustion chamber test specimen support schemes typically employ one or more flange supports, which use arc-shaped contact surfaces to lift the flanges of the test specimen. This structure has limited support points and cannot absorb the large axial and radial displacements and vibrations generated by the test specimen during testing. The support is not robust enough and is prone to jamming. Summary of the Invention

[0004] The purpose of this invention is to provide a support device for an engine combustion chamber test piece that can absorb axial and radial displacement.

[0005] One aspect of the present invention provides a support device for an engine combustion chamber test piece, comprising a frame, a connecting structure, and a support structure; wherein, both the connecting structure and the support structure are disposed on the frame; the connecting structure and the combustion chamber test piece are connected by connecting lugs, so that the connecting structure can support the upstream position of the combustion chamber test piece; the combustion chamber test piece presses against the support structure, so that the support structure can support the downstream position of the combustion chamber test piece; an elastic support member is disposed within the support structure, the elastic support member being capable of absorbing radial vibration of the combustion chamber test piece; the support structure is provided with a sliding member, the combustion chamber test piece being slidably supported on the sliding member to transmit axial displacement of the combustion chamber test piece.

[0006] In one embodiment, the combustion chamber test piece includes two connecting lugs; two connecting structures are adapted to the connecting lugs; the center of gravity of the combustion chamber test piece is located within the plane enclosed by the two connecting structures and the supporting structure on the combustion chamber test piece.

[0007] In one embodiment, the axial length of the frame is less than or equal to the axial length of the combustion chamber test piece.

[0008] In one embodiment, the support structure is one or more; the one or more support structures are arranged along the axial direction of the combustion chamber test specimen.

[0009] In one embodiment, the connection structure includes a lug connector and a fastener; wherein the lug connector is provided with a slot for accommodating the connecting lug of the combustion chamber test piece; the connecting lug is fastened to the lug connector by the fastener, thereby supporting the combustion chamber test piece on the connection structure.

[0010] In one embodiment, the lug connector includes a first connecting block and a second connecting block; the first connecting block and the second connecting block are connected to each other to form the slot; both the first connecting block and the second connecting block are provided with connecting holes that are adapted to the opening of the connecting lug; the fastener can pass through the connecting hole of the first connecting block, the opening of the connecting lug, and the connecting hole of the second connecting block to fasten the connecting lug to the lug connector.

[0011] In one embodiment, the support structure includes a support tank and the elastic support member; the elastic support member is disposed in the support tank; the sliding member is a roller disposed on the top of the support tank, and a support slider is disposed on the combustion chamber test piece corresponding to the support position of the support structure; the support slider is slidably supported on the roller, thereby transmitting the axial displacement of the combustion chamber test piece.

[0012] In one embodiment, the support device further includes a caster assembly, on which the frame is supported; the support device further includes a height adjustment structure; the height adjustment structure includes a limiting plate connected to the caster assembly; the frame can cooperate with the limiting plate to adjust the height of the frame.

[0013] In one embodiment, the limiting plate is provided with a limiting hole; the limiting hole extends in the height direction, and a bolt can pass through the limiting hole and the connecting plate provided on the frame to fasten the frame and the limiting plate; the position of the bolt in the limiting hole can be changed to change the height of the frame.

[0014] In one embodiment, the height adjustment structure further includes a positioning component; the positioning component includes a positioning bolt, a positioning nut, and a bearing, the bearing connecting the positioning bolt and the frame; a positioning baffle is provided on the top of the limiting plate; the positioning bolt passes through the positioning baffle, the positioning nut and the positioning bolt are threadedly connected and pressed against the positioning baffle to adjust the height of the frame.

[0015] The support device for the engine combustion chamber test specimen of this invention, through a connecting structure and a support structure, not only achieves stable support for the combustion chamber test specimen, but also, through the elastic support and sliding components of the support structure, allows the combustion chamber test specimen to have a certain degree of adjustability in the axial and radial directions. This absorbs the displacement and vibration generated in the axial and radial directions of the test specimen during the test, and releases the axial and radial stress. The support device of this invention is robust and stable, ensuring the smooth implementation of the test, improving the reliability of the test, suitable for supporting test specimens under heavy loads, and has a simple structure. Attached Figure Description

[0016] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of the structure of the engine combustion chamber test piece;

[0018] Figure 2 This is a schematic diagram of an embodiment of a support device for an engine combustion chamber test piece according to the present invention;

[0019] Figure 3 yes Figure 1 Side view of the support device shown;

[0020] Figure 4 yes Figure 1 A schematic diagram of the height adjustment structure of the support device shown.

[0021] Figure 5 yes Figure 4 The side view of the height adjustment structure shown. Detailed Implementation

[0022] Reference will now be made in detail to embodiments of the invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided to explain the invention and not to limit it. In fact, it will be apparent to those skilled in the art that various modifications and variations may be made to the invention without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used with another embodiment to produce yet another embodiment. Therefore, the invention is intended to cover these modifications and variations that fall within the scope of the appended claims and their equivalents.

[0023] The term "axial" refers to the central axis of the combustion chamber test specimen or a direction parallel to the central axis of the combustion chamber test specimen, while the term "radial" refers to a direction perpendicular to the "axial." The terms "upstream" and "downstream" refer to the relative directions of fluid flow within the fluid path in the combustion chamber test specimen. For example, "upstream" refers to the direction from which the fluid flows, and "downstream" refers to the direction from which the fluid flows.

[0024] Figure 1 The structure of the combustion chamber test piece 10 according to the present invention is shown. For example... Figure 1 As shown, the combustion chamber test piece 10 has an upstream interface 11 and a downstream interface 12, which are respectively connected to the interface of the test bench (not shown) for combustion chamber performance testing. The outer casing 14 of the combustion chamber test piece 10 is provided with connecting lugs 13.

[0025] Figure 2 and Figure 3 An embodiment of a support device for an engine combustion chamber test piece 10 of the present invention is shown. The support device includes a frame 100, a connecting structure 200, and a support structure 300. Both the connecting structure 200 and the support structure 300 are disposed on the frame 100. The connecting structure 200 and the combustion chamber test piece 10 are connected by connecting lugs 13, so that the connecting structure 200 can support the upstream position of the combustion chamber test piece 10. The combustion chamber test piece 10 presses against the support structure 300, so that the support structure 300 can support the downstream position of the combustion chamber test piece 10. An elastic support member (not shown) is provided within the support structure 300, which can absorb radial vibrations of the combustion chamber test piece 10. The support structure 300 is provided with a sliding member 310, on which the combustion chamber test piece 10 can be slidably supported to transmit axial displacement of the combustion chamber test piece 10.

[0026] The support device for the engine combustion chamber test specimen 10 of the present invention, through the connecting structure 200 and the support structure 300, not only provides stable support for the combustion chamber test specimen 10, but also, through the elastic support member and sliding member 310 of the support structure 300, enables the combustion chamber test specimen 10 to have a certain degree of adjustability in the axial and radial directions. This absorbs the displacement and vibration generated in the axial and radial directions of the test specimen 10 during the test, and releases the axial and radial stress. The support device of the present invention is robust and stable, ensuring the smooth implementation of the test, improving the reliability of the test, suitable for supporting test specimens 10 under heavy loads, and has a simple structure.

[0027] In one embodiment, such as Figure 1 As shown, the combustion chamber test piece 10 includes two connecting lugs 13. The two connecting lugs 13 are symmetrically arranged. Correspondingly, there are two connecting structures 200 that mate with the connecting lugs 13. Thus, the two connecting structures 200 located upstream and the support structure 300 located downstream form a triangle within the same plane, as shown. Figure 2 As shown, the center of gravity of the combustion chamber test piece 10 is located within the plane (i.e., the triangle mentioned above) formed by the support positions of the two connecting structures 200 and the support structure 300 on the combustion chamber test piece 10, which can ensure the assembly stability of the combustion chamber test piece 10 on the support structure 300.

[0028] Specifically, the connecting structure 200 includes a lug connector 210 and a fastener 220. The lug connector 210 has a slot 211 for accommodating the connecting lug 13 of the combustion chamber test specimen 10. The connecting lug 13 is securely connected to the lug connector 210 via the fastener 220, thereby supporting the combustion chamber test specimen 10 on the connecting structure 200. The rigid connection between the connecting structure 200 and the connecting lug 13 serves to fix the test specimen 10 to the support device.

[0029] Furthermore, the lug connector 210 includes a first connecting block 212 and a second connecting block 213. The first connecting block 212 and the second connecting block 213 are interconnected to form the slot 211. The first connecting block 212 and the second connecting block 213 can be configured as follows: Figure 3 The two connecting blocks are arranged in parallel. Both the first connecting block 212 and the second connecting block 213 are provided with connecting holes that are adapted to the openings of the connecting lug 13. The fastener 220 can pass through the connecting holes of the first connecting block 212, the openings of the connecting lug 13, and the connecting holes of the second connecting block 213 to fasten the connecting lug 13 to the lug connector 210.

[0030] Optionally, there may be one or more support structures 300. One or more support structures 300 are arranged axially along the combustion chamber test specimen 10. Specifically, as shown... Figure 2 and Figure 3 As shown, there is one support structure 300. One support structure 300 is positioned on the perpendicular bisector of the two connecting structures 200. Similarly, multiple support structures 300 can be evenly distributed along the perpendicular bisector of the two connecting structures 200. The preferred number of support structures 300 in this invention is 1-3. Multiple support structures 300 can distribute the load evenly and reduce the counterweight of a single support.

[0031] In one embodiment, the support structure 300 includes a support tank 320 and an elastic support member. The spring support member may be a support spring. The elastic support member is disposed within the support tank 320. The sliding member 310 is a roller (hereinafter referred to as 310) disposed at the top of the support tank 320, and the roller 310 is axially rollable. Figure 2 As shown, the roller 310 is fixed on the support on the support tank 320, which can reduce the radial vibration of the test piece 10.

[0032] A support slider 330 is provided on the combustion chamber test piece 10 at the support position corresponding to the support structure 300. The support slider 330 is slidably supported on the roller 310, thereby transmitting the axial displacement of the combustion chamber test piece 10. The support slider 330 can be welded to the support point of the outer casing 14 of the test piece 10 and is slidably supported with the roller 310, which can transmit the axial displacement of the test piece 10 and avoid excessive internal stress of the test piece 10 during the test.

[0033] In one embodiment, the support device further includes a movable wheel assembly 400, on which the frame 100 is supported. The frame 100 is welded from square steel components. Based on the frame 100, a lug structure connector 110, a spring can connector 120, and a wheel assembly connector 130 are further provided, which are used to connect with the connecting structure 200, the support can 320 of the support structure 300, and the movable wheel assembly 400, respectively, serving a connecting and fixing function.

[0034] The overall height and axial length of the frame 100 must match the height of the test bench interface and the length of the test piece 10. Specifically, the axial length of the frame 100 is less than or equal to the axial length of the combustion chamber test piece 10 to avoid interference between the frame 100 and the test bench interface.

[0035] like Figure 2 , Figure 4 and Figure 5 As shown, four wheel connectors 130 are provided at the four corners of the frame 100, which are respectively connected to four movable wheel assemblies 400. The movable wheel assembly 400 is a universal wheel assembly with a locking function. The movable support device can assemble the combustion chamber test piece 10 onto the support device of the present invention and then pull it to a designated position on the test bench, which facilitates the transportation and assembly of the test piece 10 and can also absorb the axial displacement of the combustion chamber test piece 10.

[0036] Figure 4 and Figure 5 The height adjustment structure 500 is shown. Furthermore, the support device also includes the height adjustment structure 500. The height adjustment structure 500 includes a limiting plate 510 connected to the moving wheel assembly 400. The frame 100 can cooperate with the limiting plate 510 to adjust the height of the frame 100, thereby matching the interface height of the combustion chamber test piece 10 to the test bench position for easy assembly.

[0037] like Figure 4 and Figure 5 As shown, a connecting plate 140 is provided at the end of the wheel assembly connector 130. The limiting plate 510 and the wheel assembly connector 130, and the wheel assembly connector 130 and the connecting plate 140 can both be connected by welding.

[0038] Specifically, the limiting plate 510 is provided with a limiting hole 511. The limiting hole 511 extends in the height direction, and the bolt 520 can pass through the limiting hole 511 and the connecting plate 140 to fasten the frame 100 and the limiting plate 510. Changing the position of the bolt 520 in the limiting hole 511 can thereby change the height of the frame 100.

[0039] The limiting hole 511 can be a long bolt hole of 40mm to 100mm, which can adjust the height of the connecting plate 140 according to different needs, and thus adjust the height of the frame 100.

[0040] The height adjustment structure 500 also includes a positioning assembly 530. The positioning assembly 530 includes a positioning bolt 531, a positioning nut 532, and a bearing 533, which connects the positioning bolt 531 and the frame 100. The bearing 533 can be a ball bearing. The upper ring of the bearing 533 is connected to the positioning bolt 531, and the lower ring of the bearing 533 is connected to the wheel assembly connector 130. A positioning baffle 540 is provided on the top of the limiting plate 510. The positioning bolt 531 passes through the positioning baffle 540 (the positioning baffle 540 has bolt holes that match the positioning bolt 531), and the positioning nut 532 is threadedly connected to the positioning bolt 531 and pressed against the positioning baffle 540 to fix the height of the frame 100. The positioning plate and the limiting plate 510 can be connected by welding.

[0041] When adjusting the height of the wheel assembly connector 130 (i.e., frame 100), first loosen the positioning bolt 531, adjust the height of the wheel assembly connector 130 by adjusting the positioning bolt 531, fix the position by the positioning nut 532, and finally tighten the positioning bolt 531 to fix the height of the frame 100.

[0042] When assembling the combustion chamber test piece 10 on the test bench, the test piece 10 can be first assembled onto the support device and then pulled to the designated position. The height adjustment structure 500 is used to match the interface height of the test bench position. During the test, the support device can move freely axially with the test piece 10 to compensate for the axial displacement of the test bench position.

[0043] The support device of the present invention is rigidly connected to the connecting lug 13 of the outer casing 14 of the combustion chamber test piece 10 via positioning bolts 531; simultaneously, it is elastically connected to the outer casing 14 of the combustion chamber test piece 10 via elastic support members. The pulleys between the combustion chamber test piece 10 and the support tank 320 are non-fixed, which can be used to absorb the axial displacement of the combustion chamber test piece 10. The test bench uses square steel as the integral structure, and the bottom is a moving wheel assembly 400 with locking function, which contacts the ground of the test bench and can move freely.

[0044] Compared to the existing support structure 300, which requires additional hoisting equipment for installation when assembling the combustion chamber test piece 10 on the test bench, resulting in a longer assembly time, the support device of the present invention can shorten the installation time of the combustion chamber test piece 10 by improving its high adaptability and mobility to the test bench interface.

[0045] The support device of the present invention can independently support the combustion chamber test piece 10 for assembly on the test bench, meet the support requirements of the combustion chamber test piece 10 on the performance test bench, adapt to different interface heights, release stress in all directions, shorten the installation time of the test piece 10 on the test bench, ensure the smooth implementation of the test, improve the reliability of the test, absorb displacement and vibration in all directions, and has the characteristics of simple structure, stability, easy disassembly, mobility, and easy assembly of test piece 10. It is suitable for supporting test pieces with large load (10t).

[0046] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A support device for an engine combustion chamber test piece, characterized in that, This includes the frame, connecting structure, and supporting structure; among which, Both the connecting structure and the supporting structure are disposed on the frame; The connecting structure and the combustion chamber test piece are connected by a connecting lug, so that the connecting structure can support the upstream position of the combustion chamber test piece; The combustion chamber test piece is pressed against the support structure so that the support structure can support the downstream position of the combustion chamber test piece; The support structure is provided with an elastic support member, which can absorb the radial vibration of the combustion chamber test specimen. The support structure is provided with a sliding member, and the combustion chamber test piece can be slidably supported on the sliding member to transmit the axial displacement of the combustion chamber test piece.

2. The support device as described in claim 1, characterized in that, The combustion chamber test piece includes two of the aforementioned connecting lugs; There are two connecting structures that are adapted to the connecting lug; The center of gravity of the combustion chamber test specimen is located within the plane enclosed by the two connecting structures and the support structure on the combustion chamber test specimen.

3. The support device as described in claim 1, characterized in that, The axial length of the frame is less than or equal to the axial length of the combustion chamber test piece.

4. The support device as described in claim 1, characterized in that, The supporting structure may be one or more; One or more of the support structures are arranged along the axial direction of the combustion chamber test specimen.

5. The support device as described in any one of claims 1 to 4, characterized in that, The connection structure includes a lug connector and fasteners; wherein... The lug connector is provided with a slot, which is used to accommodate the connecting lug of the combustion chamber test piece; The connecting lug is fastened by the fastener and the lug connector, thereby supporting the combustion chamber test piece on the connecting structure.

6. The support device as described in claim 5, characterized in that, The lug connector includes a first connecting block and a second connecting block; The first connecting block and the second connecting block are connected to each other to form the slot; Both the first connecting block and the second connecting block are provided with connecting holes that are adapted to the openings of the connecting lugs; The fastener can pass through the connecting hole of the first connecting block, the opening of the connecting lug, and the connecting hole of the second connecting block to fasten the connecting lug to the lug connector.

7. The support device as described in any one of claims 1 to 4, characterized in that, The support structure includes a support tank and the elastic support member; The elastic support member is disposed inside the support tank; The sliding element is a roller disposed on the top of the supporting tank, and a supporting slider is disposed on the combustion chamber test piece corresponding to the supporting position of the supporting structure; The support slider is slidably supported on the roller, thereby transmitting the axial displacement of the combustion chamber test piece.

8. The support device as described in any one of claims 1 to 4, characterized in that, The support device further includes a caster assembly, and the frame is supported on the caster assembly; The support device also includes a height adjustment structure; The height adjustment structure includes a limiting plate connected to the moving wheel assembly; The frame can cooperate with the limiting plate to adjust the height of the frame.

9. The support device as described in claim 8, characterized in that, The limiting plate is provided with limiting holes; The limiting hole extends in the height direction, and the bolt can pass through the limiting hole and the connecting plate provided on the frame to fasten the frame and the limiting plate; The height of the frame can be changed by changing the position of the bolt within the limiting hole.

10. The support device as described in claim 9, characterized in that, The height adjustment structure also includes a positioning component; The positioning assembly includes a positioning bolt, a positioning nut, and a bearing, wherein the bearing connects the positioning bolt and the frame. A positioning baffle is provided on the top of the limiting plate; The positioning bolt passes through the positioning baffle, and the positioning nut and the positioning bolt are threaded together and pressed against the positioning baffle to adjust the height of the frame.

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