An automatically adjustable multi-mode pressure distortion generation system

Abstract

The present application provides an automatically adjustable multi-mode pressure distortion generation system, belonging to the field of aerospace engine testing. The system comprises a distortion generation device, a hydraulic system, and a control system. The distortion generation device comprises a sealed housing, a distortion plug plate, and a drive device. The sealed housing is provided with pipe connection flanges at the front and rear of the sealed housing for connecting to the intake passage of a compressor test piece. The distortion plug plate is disposed within the sealed housing, and the drive device is connected to the distortion plug plate. The control system connects the distortion generation device and the hydraulic system, and the hydraulic system is connected to the drive device. The control system controls the movement of the distortion plug plate within the sealed housing, thereby blocking the intake passage and changing the inlet blockage ratio of the compressor test piece. The present application can achieve a range of blockage ratios from 0% to 100%, thereby creating different intake distortion conditions, and has the ability to quickly open the distortion generation device under special conditions such as surge.

Description

Technical Field

[0001] The present application belongs to the field of aero-engine testing, and in particular relates to an automatically adjustable multi-mode pressure distortion generating system. Background Art

[0002] Compressor inlet distortion testing is a crucial component in evaluating compressor performance. Current methods for inlet pressure distortion testing commonly use fixed baffles to create a distorted flow field at the compressor inlet. Once the baffles are installed, the steady-state and dynamic inlet distortion indices are determined. However, in this method, the baffles with varying blockage ratios used to create the distorted flow field are designed to accommodate different test specimens and speed characteristics. During full-speed testing, the appropriate baffle must be selected and installed at varying speeds. This requires multiple stops and test installations during the test to achieve the appropriate baffle (blockage ratio), significantly reducing test efficiency. Furthermore, the baffle installation method is limited, lacking hardware interfaces for installing different types of panels, such as baffles and simulators. Furthermore, for baffles with limited, fixed blockage ratios (5%-75%), a perfect match between the required distortion index and the blockage ratio cannot be achieved, thus compromising the evaluation of test results. Summary of the Invention

[0003] The purpose of the present application is to provide an automatically adjustable multi-mode pressure distortion generating system to solve or alleviate at least one problem in the background technology.

[0004] The technical solution of the present application is: an automatically adjustable multi-mode pressure distortion generating system, comprising: a distortion generating device, a hydraulic system and a control system, wherein:

[0005] The distortion generating device includes a sealed box, a distortion plug-in plate, and a driving device. The front and rear of the sealed box are provided with pipe connection flanges for connecting to the air inlet passage of the compressor test piece. The distortion plug-in plate is arranged in the sealed box, and the driving device is connected to the distortion plug-in plate.

[0006] The control system is connected to the distortion generating device and the hydraulic system, and the hydraulic system is connected to the driving device. The control system controls the movement of the distortion plug-in plate in the sealing box, thereby blocking the air intake channel and realizing the change of the inlet blockage ratio of the compressor test piece.

[0007] Preferably, the distortion insert includes a distortion baffle for realizing different blockage ratio states of the compressor test piece inlet and a distortion simulation plate for simulating different distortion indices of the inlet flow field. The distortion baffle is a flat plate without holes, and the distortion simulation plate is a flat plate with holes.

[0008] Preferably, the size and distribution of the pore structure on the distortion simulation plate are determined according to the pressure map of the inlet flow field.

[0009] Preferably, the driving device is a hydraulic driving device, and the hydraulic driving device includes a hydraulic pump or a hydraulic motor.

[0010] Preferably, the control system includes a control host, a control module, a displacement measuring sensor and a control valve. The displacement measuring sensor is arranged on the distortion plug-in plate and is used to measure the movement displacement of the distortion plug-in plate. The control valve is arranged on the hydraulic oil circuit of the driving device and is used to control the hydraulic oil circuit to drive the driving device. The control module is connected to the displacement measuring sensor and the control valve and is used to convert and communicate analog signals of the displacement measuring sensor and the control valve. The control host is connected to the control module and is used to adjust the opening of the control valve according to the movement displacement of the distortion plug-in plate measured by the displacement measuring sensor, thereby realizing the driving of the driving device.

[0011] Preferably, the displacement measurement sensor is an LVDT sensor.

[0012] Preferably, it further includes a switching module, which connects the control host and the control module for exchanging data.

[0013] The automatically adjustable multi-mode pressure distortion generation system provided in this application can achieve coverage of 0-100% blockage ratio states, thereby forming different intake distortion conditions, and has the function of quickly opening the distortion generation device under special conditions such as surge. In addition, the automatically adjustable multi-mode pressure distortion generation system of this application can adopt a distortion simulation plate with the same connection structure as the distortion baffle according to the requirements of the inlet flow field pressure map. The distortion baffle can be directly replaced with a distortion simulation plate of a different style, reducing the cumbersomeness of adjusting the distortion index during the compressor intake distortion test and realizing real-time dynamic adjustment of the distortion index. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions provided by this application, the following is a brief introduction to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application.

[0015] Figure 1 Schematic diagram of the automatically adjustable multi-mode pressure distortion generating system of the present application.

[0016] Figure 2 This is a front view of the distortion generating device of this application.

[0017] Figure 3 This is a side view of the distortion generating device of the present application.

[0018] Figure 4 This is a schematic diagram of the distortion simulation board of this application.

[0019] Figure 5Schematic diagram of the distortion baffle of this application.

[0020] Figure 6 This is a schematic diagram of the control system of this application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the implementation of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below in conjunction with the drawings in the embodiments of this application.

[0022] In order to solve the problems of low test efficiency and inability to achieve perfect matching between the required distortion index and the blockage ratio during the compressor inlet pressure distortion test in the prior art, the present application provides an automatically adjustable multi-mode pressure distortion generation system.

[0023] like Figure 1 As shown, the automatically adjustable multi-mode pressure distortion generating system provided by the present application includes: a distortion generating device 10, a hydraulic system 20 and a control system 30.

[0024] like Figure 2 and Figure 3 As shown, the distortion generating device 10 includes a sealed box 11, a distortion insert 12, and a drive device 13. The sealed box 11 is formed by welding or bolting metal plates to form a box structure. Pipe connection flanges 111 for connecting to an air inlet passage 112 are provided on the front F and rear B of the sealed box 11. The front air inlet passage 112 and the rear air inlet passage 112 are connected to the pipe connection flanges 111, thereby enabling gas input to the inlet of the compressor test piece.

[0025] like Figure 4 and Figure 5 As shown, the distortion insert 12 includes a distortion baffle 121 for achieving different blockage ratios at the compressor test specimen's inlet, and a distortion simulation plate 122 for simulating different distortion indices in the inlet flow field. Distortion baffle 121 is a flat, non-porous structure, while distortion simulation plate 122 is a flat, perforated structure. The size and distribution of the perforations on distortion simulation plate 122 are determined based on the pressure map of the inlet flow field. For example, both the sealed housing 11 and the distortion insert 12 can be made of metal steel, such as 4340 steel.

[0026] The drive device 13 is connected to the distortion plate 12 via a threaded sleeve 131. The drive device 13 enables relative movement of the distortion plate 12 within the sealed housing 11. In this application, the drive device 13 is a hydraulic drive mechanism, enabling high power transmission in high-temperature environments. For example, the drive device 13 may be a hydraulic pump or a hydraulic motor.

[0027] In the present application, the hydraulic system 20 connects the drive device 13 and the control system 30 . The hydraulic system 20 is used to provide a matching hydraulic oil circuit for the drive device 13 and adjust the driving force of the drive device 13 under the control of the control system 30 .

[0028] like Figure 6 As shown, the control system 30 includes a control host 31, a control module 32, a displacement measurement sensor 33 and a control valve 34. The displacement measurement sensor 33 is provided on the distortion plug-in plate 12 for measuring the movement displacement of the distortion plug-in plate 12. The control valve 34 is provided in the hydraulic oil circuit of the drive device 13 for accurately controlling the hydraulic oil circuit to achieve precise driving of the drive device 13. The control module 32 is connected to the displacement measurement sensor 33 and the control valve 34 for converting and communicating analog signals of the displacement measurement sensor 33 and the control valve 34. The control host 31 is connected to the control module 32 for adjusting the opening of the control valve 34 according to the movement displacement of the distortion plug-in plate 12 measured by the displacement measurement sensor 33, thereby achieving precise driving of the drive device 13.

[0029] In some embodiments of the present application, the control module 32 can be a PLC controller, which has functions such as data processing, logical operation, operation data storage, input / output and communication, and can realize the analog signal data conversion and transmission of the displacement measurement sensor 33 and the control valve 34.

[0030] Optionally, the displacement measurement sensor 33 in the present application adopts an LVDT sensor (Linear Variable Differential Transformer) to achieve high-precision displacement measurement of the distortion plug-in board 12 .

[0031] Optionally, the control system 30 of the present application further includes a switching module 35 , which connects the control host 31 and the control module 32 for exchanging data.

[0032] Based on the above-mentioned automatically adjustable multi-mode pressure distortion generating system, the present application provides a method for implementing compressor distortion testing at different blockage ratios, the method comprising:

[0033] S11, disposing the distortion baffle 121 in the sealed box 11, connecting the drive device 13 and the distortion baffle 121, and moving the distortion baffle 121 to the leftmost position so that it does not overlap with the air inlet channel 112;

[0034] S12, starting the compressor test piece and controlling the compressor test piece to run to a target speed;

[0035] In step S13, the control system 30 adjusts the opening of the control valve 34 to control the precise movement of the drive device 13. Based on the measurement value fed back by the displacement measurement sensor 33, the control system 30 controls the distortion baffle 121 to move rightward at a predetermined speed, thereby blocking the intake passage 112, achieving a range of blockage ratios from 0% to 100%, and forming different intake distortion conditions.

[0036] S14, recording the performance of the compressor test piece at a specified blockage ratio at a target speed;

[0037] S15, repeating the above process until the performance recording of the compressor test piece at multiple specified blockage ratio state points at multiple target speeds is completed.

[0038] In addition, the above-mentioned automatically adjustable multi-mode pressure distortion generating system, the present application also provides a compressor distortion test method for achieving different blockage ratios under a required distortion index, the method comprising:

[0039] S21, based on the pressure map requirements of the inlet flow field, determine the corresponding distortion simulation plate 122, place the distortion simulation plate 122 in the sealed box 11, connect the drive device 13 to the distortion simulation plate 122, and move the distortion simulation plate 122 to the leftmost position so that it does not overlap with the intake passage 112;

[0040] S22, starting the compressor test piece and controlling the compressor test piece to run to a target speed;

[0041] S23: Input the target distortion index into the control system 30. The control system 30 adjusts the opening of the control valve 34 to control the drive device 13 to perform precise movements. Based on the measurement value fed back by the displacement measurement sensor 33, the control system 30 controls the distortion simulation board 122 to move to the right at a predetermined speed. The control system 30 calculates in real time whether the distortion index meets the requirements. If so, the next step is executed. If not, the distortion simulation board 122 is controlled to continue to move, thereby achieving different blockage ratio states under the required distortion index.

[0042] S24, recording the performance of the compressor test piece under the conditions of the required distortion index of the target speed and the specified blockage ratio;

[0043] S15, repeating the above process until the performance of the compressor test piece at multiple specified blockage ratio state points under multiple target speed demand distortion indices is completed.

[0044] The automatically adjustable multi-mode pressure distortion generating system provided by the present application can achieve coverage of 0-100% blockage ratio states and thus form different intake distortion conditions by controlling the left and right movement of the distortion baffle 121. It has the function of quickly opening the distortion generating device under special conditions such as surge. In addition, the automatically adjustable multi-mode pressure distortion generating system of the present application can adopt a distortion simulation board with the same connection structure as the distortion baffle according to the requirements of the inlet flow field pressure map. The distortion baffle can be directly replaced with a distortion simulation board of different styles, which reduces the tediousness of adjusting the distortion index during the compressor intake distortion test and realizes real-time dynamic adjustment of the distortion index.

[0045] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An automatically adjustable multi-mode pressure distortion generating system, characterized in that: include: A distortion generating device (10), a hydraulic system (20) and a control system (30), wherein: The distortion generating device (10) comprises a sealed box (11), a distortion plug-in plate (12), and a driving device (13); the front and rear of the sealed box (11) are provided with pipe connecting flanges (111) for connecting to an air inlet passage (112) of a compressor test piece; the distortion plug-in plate (12) is arranged in the sealed box (11); and the driving device (13) is connected to the distortion plug-in plate (12); The control system (30) is connected to the distortion generating device (10) and the hydraulic system (20), and the hydraulic system (20) is connected to the driving device (13). The control system (30) controls the movement of the distortion insert plate (12) in the sealing box (11), thereby blocking the air inlet passage (112) and achieving a change in the inlet blockage ratio of the compressor test piece.

2. The automatically adjustable multi-mode pressure distortion generating system according to claim 1, characterized in that: The distortion insert (12) comprises a distortion baffle (121) for realizing different blockage ratio states of the compressor test piece inlet and a distortion simulation plate (122) for simulating different distortion indices of the inlet flow field, wherein the distortion baffle (121) is a flat plate with no holes, and the distortion simulation plate (122) is a flat plate with holes.

3. The automatically adjustable multi-mode pressure distortion generating system according to claim 2, wherein: The size and distribution of the pore structure on the distortion simulation plate (122) are determined according to the pressure map of the inlet flow field.

4. The automatically adjustable multi-mode pressure distortion generating system according to claim 1, wherein: The driving device (13) is a hydraulic driving device, and the hydraulic driving device includes a hydraulic pump or a hydraulic motor.

5. The automatically adjustable multi-mode pressure distortion generating system according to any one of claims 1 to 4, characterized in that: The control system (30) comprises a control host (31), a control module (32), a displacement measurement sensor (33) and a control valve (34); the displacement measurement sensor (33) is arranged on the distortion plug plate (12) and is used to measure the displacement of the distortion plug plate (12); the control valve (34) is arranged on the hydraulic oil circuit of the drive device (13) and is used to control the hydraulic oil circuit to drive the drive device (13); the control module (32) is connected to the displacement measurement sensor (33) and the control valve (34) and is used to convert and communicate analog signals of the displacement measurement sensor (33) and the control valve (34); the control host (31) is connected to the control module (32) and is used to adjust the opening of the control valve (34) according to the displacement of the distortion plug plate (12) measured by the displacement measurement sensor (33), thereby driving the drive device (13).

6. The automatically adjustable multi-mode pressure distortion generating system according to claim 5, characterized in that: The displacement measurement sensor (33) is an LVDT sensor.

7. The automatically adjustable multi-mode pressure distortion generating system according to claim 5, characterized in that: It also includes a switching module (35), which is connected to the control host (31) and the control module (32) for exchanging data.

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