Non-axisymmetric casing flow control effect evaluation apparatus

Abstract

The application discloses a non-axisymmetric casing flow control effect evaluation device and belongs to the technical field of aero-engine testing. The device comprises a top-opened mounting frame, a placing table arranged in the mounting frame, self-adapting support assemblies slidably arranged at both ends of the mounting frame, a support arranged at the top of the mounting frame, a cooperative driving assembly and a limiting assembly arranged on the support, and the self-adapting support assemblies and the limiting assembly correspond to each other in the vertical direction. The self-adapting support assembly comprises a lifting frame connected with the cooperative driving assembly and a plurality of lifting units arranged in the lifting frame, and the lifting units can be in adaptive contact with the non-axisymmetric casing. The application can not only support the non-axisymmetric casing well, but also ensure that the non-axisymmetric casing will not be deviated under the action of the spring, has high mounting precision and can realize accurate butt joint with the end of a test section.

Description

Technical Field

[0001] This invention relates to the field of aero-engine testing technology, specifically to a device for evaluating the flow control effect of a non-axisymmetric casing. Background Technology

[0002] A non-axisymmetric casing is a casing in aerospace engines whose inner and outer wall geometry does not have rotational symmetry. There are significant differences in the circumferential cross-sectional shape and size. This non-axisymmetric property mainly achieves specific functions (such as adjusting the airflow field). Compared with axisymmetric casings, it can more accurately match the complex internal flow field or structural requirements.

[0003] The casing flow control effect evaluation equipment is a device used to measure and analyze its impact on the airflow field and performance of turbomachinery. It includes flow field measurement equipment (such as particle image velocimeters, PIV), performance testing equipment (such as flow meters, etc.), dynamic monitoring equipment (such as vibration sensors, etc.), and data acquisition and analysis systems. By capturing changes in various airflow parameters and combining them with performance indicators, the actual effect of non-axisymmetric design on flow control can be quantitatively evaluated. The test section is the core area for simulating the actual environment of aero-engines and evaluating the flow control effect of non-axisymmetric casings. The casing end needs to be precisely connected to its inlet and outlet to form a complete closed airflow channel to meet the basic conditions for flow field measurement.

[0004] When evaluating the performance of a non-axisymmetric casing, it is necessary to transport and install the casing on the test bench. Due to the complex shape of the non-axisymmetric casing and the high accuracy requirements for installation and positioning, in order to ensure that the end of the casing is precisely aligned with the inlet and outlet of the test section, the position of the casing needs to be finely adjusted in height and horizontal direction multiple times, resulting in poor installation efficiency of the casing. Summary of the Invention

[0005] The purpose of this invention is to provide a device for evaluating the flow control effect of a non-axisymmetric casing, so as to solve the problem of low installation accuracy when evaluating the flow control effect of existing non-axisymmetric casings.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A device for evaluating the flow control effect of a non-axisymmetric casing includes: a mounting frame with a top opening, a placement platform disposed inside the mounting frame, adaptive support components slidably disposed at both ends inside the mounting frame, a bracket disposed at the top of the mounting frame, a cooperative drive component and a limiting component disposed on the bracket, wherein the adaptive support component and the limiting component correspond one-to-one in the vertical direction. The adaptive support assembly includes a lifting frame connected to the cooperative drive assembly and several lifting units disposed within the lifting frame; each lifting unit includes a vertically arranged lifting slide rod and a spring sleeved on the lifting slide rod and located within the lifting frame; the lifting slide rod slides through the top and bottom of the lifting frame, and the lifting slide rod is provided with a stop block located within the lifting frame, and the two ends of the spring contact the stop block and the inner bottom wall of the lifting frame, respectively.

[0007] Furthermore, the top of the aforementioned lifting slide is provided with an elastic pad, which is not higher than the top surface of the placement platform.

[0008] Furthermore, in the same adaptive support assembly described above, all lifting slides are arranged sequentially along the transverse direction of the placement platform.

[0009] Furthermore, the aforementioned collaborative drive assembly includes a first driver disposed on the top of the bracket, a drive rod connected to the first driver, a first lead screw and a second lead screw respectively connected to both ends of the drive rod, and a first connecting plate and a second connecting plate respectively threadedly connected to the first lead screw and the second lead screw; the two ends of the first connecting plate and the second connecting plate are respectively connected to two lifting frames.

[0010] Furthermore, the first driver is connected to the drive rod via a bevel gear pair, and the drive rod is connected to the first lead screw and the second lead screw via bevel gear pairs. Both the first lead screw and the second lead screw are vertically arranged and rotate with the bracket. The threads of the first lead screw and the second lead screw have opposite directions.

[0011] Furthermore, the aforementioned limiting component includes a second driver and a pressure plate disposed at the top of the bracket; the pressure plate and the lifting slide are disposed opposite each other in the vertical direction.

[0012] Furthermore, it also includes a fine-tuning component; the fine-tuning component includes a base and a fine-tuning drive component; the mounting frame is placed on the base, the fine-tuning drive component is set on the base and connected to the side wall of the mounting frame, and the fine-tuning drive component drives the mounting frame to reciprocate in the lateral direction.

[0013] Furthermore, the aforementioned base includes a base plate and mounting plates vertically arranged on both sides of the base plate, with the fine-tuning drive assembly mounted on one of the mounting plates.

[0014] Furthermore, the aforementioned fine-tuning drive assembly includes a third driver mounted on the mounting plate and a third lead screw connected to the third driver. The third lead screw rotates with the mounting plate and threadedly engages with the mounting frame and the placement table.

[0015] Furthermore, the bottom of the mounting frame is provided with several rollers, and the rollers roll in the horizontal direction of the mounting frame.

[0016] The present invention has the following beneficial effects: When installing a non-axisymmetric housing, this invention uses an adaptive support assembly and a limiting assembly to clamp the housing. During clamping, all the lifting rods in the adaptive support assembly support the irregular surface of the non-axisymmetric housing under the action of springs. Meanwhile, the limiting assembly clamps and fixes the top of the non-axisymmetric housing, providing a proper orientation. Therefore, this invention not only ensures excellent support for the non-axisymmetric housing but also prevents it from shifting under the action of springs, maintaining it in the correct position with high installation accuracy. Furthermore, this invention allows for lateral fine-tuning of the non-axisymmetric housing, achieving precise alignment between the end of the housing and the end of the test section. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the non-axisymmetric casing flow control effect evaluation device of the present invention; Figure 2 This is a schematic diagram of the non-axisymmetric casing flow control effect evaluation device of the present invention from another direction; Figure 3 This is a schematic diagram of the connection structure between the adaptive support components of the present invention; Figure 4 This is a schematic diagram of the connection structure between the bracket, the collaborative drive component, and the limiting component of the present invention; Figure 5 This is a schematic diagram of the connection structure between the fine-tuning component and the mounting frame of the present invention.

[0018] In the diagram: 10-Mounting frame; 11-Roller; 20-Placement platform; 30-Adaptive support assembly; 31-Lifting frame; 32-Lifting unit; 40-Bracket; 50-Cooperative drive assembly; 51-First driver; 52-Drive rod; 53-First lead screw; 54-Second lead screw; 55-First connecting plate; 56-Second connecting plate; 60-Limiting assembly; 61-Second driver; 62-Pressure plate; 70-Fine adjustment assembly; 71-Base; 72-Fine adjustment drive assembly; 321-Lifting slide bar; 322-Spring; 323-Stop; 324-Elastic pad; 711-Base plate; 712-Mounting plate; 721-Third driver; 722-Third lead screw. Detailed Implementation

[0019] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0020] Please refer to Figures 1 to 5This invention provides a device for evaluating the flow control effect of a non-axisymmetric casing, comprising: a mounting frame 10, a placement platform 20, an adaptive support assembly 30, a bracket 40, a cooperative drive assembly 50, and a limiting assembly 60. The mounting frame 10 has a top opening, and the placement platform 20 is located inside the mounting frame 10. Preferably, the placement platform 20 is integrally formed with the mounting frame 10 to avoid misalignment. Adaptive support assemblies 30 are respectively provided at both ends inside the mounting frame 10. The bracket 40 is mounted on the top of the mounting frame 10, and the cooperative drive assembly 50 is located on the top of the bracket 40, used to drive the two adaptive support assemblies 30 to rise and fall synchronously. The limiting assembly 60 corresponds one-to-one with the adaptive support assembly 30 in the vertical direction, and the non-axisymmetric casing is clamped and fixed by the limiting assembly 60 and the adaptive support assembly 30.

[0021] The adaptive support assembly 30 includes a lifting frame 31 and several lifting units 32 disposed on the lifting frame 31. The lifting frame 31 is hollow inside and is slidably disposed between the end of the placement platform 20 and the mounting frame 10, with the sliding direction being vertical. The lifting unit 32 includes a lifting slide rod 321 and a spring 322. The lifting slide rod 321 slides through the top and bottom of the lifting frame 31. The top of the lifting slide rod 321 is provided with an elastic pad 324. The material of the elastic pad 324 includes, but is not limited to, rubber, to protect the non-axisymmetric casing from damage. A stop block 323 is provided in the middle of the lifting slide rod 321. The stop block 323 is located inside the lifting frame 31. The spring 322 is sleeved on the lifting slide rod 321 and located inside the lifting frame 31. When the non-axisymmetric housing is not supported, the two ends of the spring 322 are in contact with the bottom wall of the stop block 323 and the inner bottom wall of the lifting frame 31, respectively. The top wall of the stop block 323 is in contact with the inner top wall of the lifting frame 31. The elastic pad 324 is not higher than the top surface of the placement platform 20. When the non-axisymmetric housing is placed on the placement platform 20, the spring 322 will not be compressed, and the elastic pad 324 will not interfere with the placement of the non-axisymmetric housing.

[0022] In this embodiment, the lifting slide bars 321 in the same adaptive support assembly 30 are arranged sequentially at intervals along the transverse direction of the placement platform 20.

[0023] The collaborative drive assembly 50 includes a first driver 51, a drive rod 52, a first lead screw 53, a second lead screw 54, a first connecting plate 55, and a second connecting plate 56. The first driver 51 is a servo motor, which is mounted on the top of the bracket 40. The drive rod 52 is rotatably mounted on the top of the bracket 40 along the lateral direction of the bracket 40. The first driver 51 and the drive rod 52 transmit power through a bevel gear pair at their middle sections. The first lead screw 53 and the second lead screw 54 are both vertically mounted and rotatably engaged with the bracket 40. The two ends of the drive rod 52 transmit power to the first lead screw 53 and the second lead screw 54 respectively through bevel gear pairs. The two ends of the first connecting plate 55 are connected to one end of each of the two lifting frames 31, and the two ends of the second connecting plate 56 are connected to the other ends of each of the two lifting frames 31. Through the connection of the connecting plates, the two adaptive support assemblies 30 can form a whole and can rise and fall synchronously. The bottoms of the first lead screw 53 and the second lead screw 54 are threaded into the first connecting plate 55 and the second connecting plate 56 respectively.

[0024] When the first driver 51 is working, it drives the drive rod 52 to rotate, thereby driving the first lead screw 53 and the second lead screw 54 to rotate synchronously, which in turn drives the first connecting plate 55 and the second connecting plate 56 to rise and fall, realizing the synchronous rise and fall of the two adaptive support components 30.

[0025] In this embodiment, the threads of the first lead screw 53 and the second lead screw 54 are opposite. Since the drive rod 52 will cause the first lead screw 53 and the second lead screw 54 to rotate in opposite directions, the opposite thread direction setting can drive the first connecting plate 55 and the second connecting plate 56 to rise and fall synchronously. Moreover, the opposite thread direction setting can cancel the torque generated by the first lead screw 53 and the second lead screw 54 during rotation, and avoid the lifting frame 31 from getting stuck during sliding.

[0026] The limiting assembly 60 includes a second actuator 61 and a pressure plate 62. The second actuator 61 is a cylinder, which is fixedly mounted on the top of the bracket 40. The actuating part of the second actuator 61 passes through the top of the bracket 40 and connects to the pressure plate 62. The pressure plate 62 and the corresponding lifting frame 31 are vertically opposite each other, that is, the extension direction of the pressure plate 62 is consistent with the extension direction of the lifting frame 31, so that the pressure plate 62 and the lifting unit 32 can jointly clamp and fix the non-axisymmetric housing. In this embodiment, a guide rod is connected to the pressure plate 62. The guide rod slides with the top of the bracket 40 and the sliding direction is consistent with the actuating direction of the second actuator 61. The presence of the guide rod can prevent the pressure plate 62 from rotating and failing to correspond with the lifting frame 31.

[0027] To perform lateral fine-tuning of the non-axisymmetric casing, this embodiment also includes a fine-tuning assembly 70, which includes a base 71 and a fine-tuning drive assembly 72. The base 71 includes a base plate 711 and mounting plates 712 vertically arranged on both sides of the base plate 711. The bottom of the mounting frame 10 is provided with several rollers 11, which contact the base plate 711. The rolling direction of the rollers 11 is the lateral direction of the mounting frame 10. The fine-tuning drive assembly 72 includes a third driver 721 mounted on one of the mounting plates 712 and a third lead screw 722 connected to the third driver 721. The third driver 721 is a servo motor. The extension direction of the third lead screw 722 is consistent with the lateral direction of the mounting frame 10. One end of the third lead screw 722 is connected to the third driver 721, and the other end of the third lead screw 722 is threaded into the mounting frame 10 and the placement platform 20.

[0028] During installation, the non-axisymmetric housing is first placed on the placement platform 20. Then, the first driver 51 drives the drive rod 52 to rotate, which in turn drives the first lead screw 53 and the second lead screw 54 to rotate. During the rotation, the first connecting plate 55, the second connecting plate 56, and the two lifting frames 31 move upward. The lifting unit 32 adaptively contacts the non-axisymmetric housing according to its structure, and separates the non-axisymmetric housing from the placement platform 20. Then, the second driver 61 drives the pressure plate 62 to move downward and contact the non-axisymmetric housing, thereby clamping and fixing the non-axisymmetric housing. During the clamping and fixing process, the adaptive contact of the lifting unit 32 can have a large contact area with the non-axisymmetric housing, providing good support for the non-axisymmetric housing. The presence of the two pressure plates 62 not only limits the non-axisymmetric housing but also ensures that the non-axisymmetric housing will not shift under the action of the spring. In addition, in order to achieve precise docking between the end of the non-axisymmetric casing and the end of the test section, the third drive 721 can drive the third lead screw 722 to rotate.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for evaluating the flow control effect of a non-axisymmetric casing, characterized in that, include: The mounting frame (10) with a top opening, the placement platform (20) set inside the mounting frame (10), the adaptive support components (30) slidably set at both ends inside the mounting frame (10), the bracket (40) set at the top of the mounting frame (10), the cooperative drive component (50) and the limiting component (60) set on the bracket (40), wherein the adaptive support component (30) and the limiting component (60) correspond one-to-one in the vertical direction; The adaptive support assembly (30) includes a lifting frame (31) connected to the cooperative drive assembly (50) and a plurality of lifting units (32) disposed within the lifting frame (31); the lifting unit (32) includes a vertically arranged lifting slide rod (321) and a spring (322) sleeved on the lifting slide rod (321) and located within the lifting frame (31); the lifting slide rod (321) slides through the top and bottom of the lifting frame (31), the lifting slide rod (321) is provided with a stop block (323) located within the lifting frame (31), and the two ends of the spring (322) respectively contact the stop block (323) and the inner bottom wall of the lifting frame (31).

2. The non-axisymmetric casing flow control effect evaluation device according to claim 1, characterized in that, The top of the lifting slide bar (321) is provided with an elastic pad (324), and the elastic pad (324) is not higher than the top surface of the placement platform (20).

3. The non-axisymmetric casing flow control effect evaluation device according to claim 1, characterized in that, In the same adaptive support assembly (30), all the lifting slides (321) are arranged sequentially along the transverse side of the placement platform (20).

4. The non-axisymmetric casing flow control effect evaluation device according to claim 1, characterized in that, The collaborative drive assembly (50) includes a first driver (51) disposed on the top of the bracket (40), a drive rod (52) connected to the first driver (51), a first lead screw (53) and a second lead screw (54) respectively connected to both ends of the drive rod (52), and a first connecting plate (55) and a second connecting plate (56) respectively threadedly connected to the first lead screw (53) and the second lead screw (54); the two ends of the first connecting plate (55) and the second connecting plate (56) are respectively connected to the two lifting frames (31).

5. The non-axisymmetric casing flow control effect evaluation device according to claim 4, characterized in that, The first driver (51) is connected to the drive rod (52) via a bevel gear pair. The drive rod (52) is connected to the first lead screw (53) and the second lead screw (54) via bevel gear pairs. The first lead screw (53) and the second lead screw (54) are both vertically arranged and rotate with the bracket (40). The threads of the first lead screw (53) and the second lead screw (54) are opposite.

6. The non-axisymmetric casing flow control effect evaluation device according to claim 1, characterized in that, The limiting component (60) includes a second driver (61) disposed on the top of the bracket (40) and a pressure plate (62); the pressure plate (62) and the lifting slide bar (321) are disposed opposite each other in the vertical direction.

7. The non-axisymmetric casing flow control effect evaluation device according to any one of claims 1 to 6, characterized in that, It also includes a fine-tuning component (70); the fine-tuning component (70) includes a base (71) and a fine-tuning drive component (72); the mounting frame (10) is placed on the base (71), the fine-tuning drive component (72) is disposed on the base (71) and connected to the side wall of the mounting frame (10), and the fine-tuning drive component (72) drives the mounting frame (10) to reciprocate in the lateral direction.

8. The non-axisymmetric casing flow control effect evaluation device according to claim 7, characterized in that, The base (71) includes a base plate (711) and mounting plates (712) vertically arranged on both sides of the base plate (711), and the fine-tuning drive assembly (72) is mounted on one of the mounting plates (712).

9. The non-axisymmetric casing flow control effect evaluation device according to claim 8, characterized in that, The fine-tuning drive assembly (72) includes a third driver (721) disposed on the mounting plate (712) and a third lead screw (722) connected to the third driver (721). The third lead screw (722) is rotatably engaged with the mounting plate (712) and threadedly engaged with the mounting frame (10) and the placement platform (20).

10. The non-axisymmetric casing flow control effect evaluation device according to claim 9, characterized in that, The bottom of the mounting frame (10) is provided with several rollers (11), and the rolling direction of the rollers (11) is the horizontal direction of the mounting frame (10).

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