Multi-mode pressure distortion generation system capable of being automatically adjusted

Abstract

The invention provides a multi-mode pressure distortion generating system capable of being automatically adjusted, and belongs to the field of aero-engine tests.The multi-mode pressure distortion generating system comprises a distortion generating device, a hydraulic system and a control system.The distortion generating device comprises a sealing box body, a distortion inserting plate and a driving device; pipeline connecting flanges used for being connected with an air inlet channel of an air compressor test piece are arranged on the front face and the rear face of the sealing box body, the distortion inserting plate is arranged in the sealing box body, and the driving device is connected with the distortion inserting plate; the control system is connected with the distortion generating device and the hydraulic system, the hydraulic system is connected with the driving device, and the distortion inserting plate is controlled by the control system to move in the sealing box body, so that the air inlet channel is blocked, and the change of the blocking ratio of the inlet of the compressor test piece is realized. According to the invention, a 0-100% blockage ratio state can be covered, so that different air inlet distortion conditions are formed, and a function of quickly opening the distortion generation device under special conditions such as surge and the like is achieved.

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: 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. 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.

[0005] 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.

[0006] 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.

[0007] Preferably, the driving device is a hydraulic driving device, and the hydraulic driving device includes a hydraulic pump or a hydraulic motor.

[0008] Preferably, the control system includes a control host, a control module, a displacement measurement sensor, and a control valve. The displacement measurement sensor is arranged on the distortion plate and is used to measure the moving displacement of the distortion 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 realize the driving of the driving device. The control module is connected to the displacement measurement sensor and the control valve and is used to convert and communicate the analog signals of the displacement measurement sensor and the control valve. The control host is connected to the control module and is used to adjust the opening degree of the control valve according to the moving displacement of the distortion plate measured by the displacement measurement sensor, thereby realizing the driving of the driving device.

[0009] Preferably, the displacement measurement sensor is an LVDT sensor.

[0010] Preferably, an exchange module is further included. The exchange module is connected to the control host and the control module and is used for data exchange.

[0011] The automatically adjustable multi-mode pressure distortion generation system provided by the present application can achieve a state covering a 0-100% blockage ratio to form different intake distortion conditions, and has a fast opening function of the distortion generating device under special conditions such as surge. In addition, the automatically adjustable multi-mode pressure distortion generation system of the present application can adopt a distortion simulation plate with the same connection structure form as the distortion baffle according to the requirements of the inlet flow field pressure map, and can directly replace the distortion baffle with different styles of distortion simulation plates, reducing the complexity of adjusting the distortion index during the compressor inlet distortion test, and realizing real-time dynamic adjustment of the distortion index. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions provided by the present application, the drawings will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application.

[0013] Figure 1 It is a schematic diagram of the automatically adjustable multi-mode pressure distortion generation system of the present application.

[0014] Figure 2 It is a front view of the distortion generating device of the present application.

[0015] Figure 3 It is a side view of the distortion generating device of the present application.

[0016] Figure 4 It is a schematic diagram of the distortion simulation plate of the present application.

[0017] Figure 5 It is a schematic diagram of the distortion baffle of the present application.

[0018] Figure 6 This is a schematic diagram of the control system of the present application. Detailed implementation manners

[0019] To make the purpose, technical solutions and advantages of the implementation of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application.

[0020] In order to solve the problems of low test efficiency and inability to achieve a perfect match between the required distortion index and blockage ratio during the compressor inlet pressure distortion test in the prior art. The present application provides an automatically adjustable multi-mode pressure distortion generating system.

[0021] As Figure 1 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.

[0022] As Figure 2 and Figure 3 shown, the distortion generating device 10 includes a sealed box body 11, a distortion plate 12 and a driving device 13. The sealed box body 11 is formed into a box structure by welding or bolt connection of metal plates. Pipe connection flanges 111 for connecting the intake passage 112 are provided on both the front F and the back B of the sealed box body 11. The intake passage 112 on the front side and the intake passage 112 on the back side are connected to the pipe connection flange 111, so as to realize the gas input at the inlet of the compressor test piece.

[0023] As Figure 4 and Figure 5 shown, the distortion plate 12 includes a distortion baffle 121 for realizing different blockage ratio states at the inlet of the compressor test piece and a distortion simulation plate 122 for simulating different distortion indices of the inlet flow field. Among them, the distortion baffle 121 is a flat plate without holes, and the distortion simulation plate 122 is a flat plate with holes. The hole structure size and distribution on the distortion simulation plate 122 are determined according to the pressure map of the inlet flow field. Exemplarily, both the sealed box body 11 and the distortion plate 12 can be made of metal steel plates, such as 4340 steel, etc.

[0024] The driving device 13 is connected to the distortion plate 12 through a threaded sleeve 131, and the distortion plate 12 can be moved relative to the sealed box body 11 through the driving device 13. In the present application, the driving device 13 is a hydraulic driving mechanism, so that a large power transmission can be realized in a high-temperature environment. Exemplarily, the driving device 13 can be a hydraulic pump or a hydraulic motor.

[0025] In the present application, a hydraulic system 20 is connected to a driving device 13 and a control system 30. The hydraulic system 20 is used to provide a supporting hydraulic oil circuit for the driving device 13 and adjust the driving force of the driving device 13 under the control of the control system 30.

[0026] As Figure 6 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 arranged on the distortion plugboard 12 and is used to measure the moving displacement of the distortion plugboard 12. The control valve 34 is arranged on the hydraulic oil circuit of the driving device 13 and is used to accurately control the hydraulic oil circuit to achieve accurate driving of the driving 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 the 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 degree of the control valve 34 according to the moving displacement of the distortion plugboard 12 measured by the displacement measurement sensor 33, so as to achieve accurate driving of the driving device 13.

[0027] 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 conversion and transmission of analog signal data between the displacement measurement sensor 33 and the control valve 34.

[0028] 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 plugboard 12.

[0029] Optionally, the control system 30 of the present application further includes a switching module 35. The switching module 35 is connected to the control host 31 and the control module 32 and is used for data exchange.

[0030] Based on the above automatically adjustable multi-mode pressure distortion generation system, the present application provides a compressor distortion test method for realizing different blockage ratios. The method includes: S11, arranging the distortion baffle 121 in the sealed box 11, connecting the driving 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; S12, starting the compressor test piece and controlling the compressor test piece to run to the target speed; S13. The control system 30 adjusts the opening degree of the control valve 34 to control the precise movement of the driving device 13. According to the measured value fed back by the displacement measurement sensor 33, the control system 30 controls the distortion baffle 121 to move to the right at a predetermined speed, thereby blocking the intake passage 112, achieving a state with a blockage ratio covering 0 to 100%, and forming different intake distortion conditions. S14. Perform performance acquisition of the compressor test piece under the specified blockage ratio state at the target speed. S15. Repeat the above process until the performance acquisition of the compressor test piece at multiple specified blockage ratio state points under multiple target speeds is completed.

[0031] In addition, for the above automatically adjustable multi-mode pressure distortion generation system, the present application also provides a compressor distortion test method for achieving different blockage ratios under the required distortion index. The method includes: S21. Determine the corresponding distortion simulation plate 122 according to the pressure map requirements of the inlet flow field. Set the distortion simulation plate 122 in the sealed box 11, connect the driving device 13 and 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. S22. Start the compressor test piece and control the compressor test piece to operate at the target speed. S23. Input the target distortion index into the control system 30. The control system 30 adjusts the opening degree of the control valve 34 to control the precise movement of the driving device 13. According to the measured value fed back by the displacement measurement sensor 33, the control system 30 controls the distortion simulation plate 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 it meets the requirements, proceed to the next step. If it does not meet the requirements, control the distortion simulation plate 122 to continue to move, thereby achieving different blockage ratio states under the required distortion index. S24. Perform performance acquisition of the compressor test piece under the required distortion index and the specified blockage ratio state at the target speed. S15. Repeat the above process until the performance acquisition of the compressor test piece at multiple specified blockage ratio state points under the required distortion index of multiple target speeds is completed.

[0032] The automatically adjustable multi-mode pressure distortion generation system provided by the present application can achieve the state of covering 0 to 100% blockage ratio by controlling the left and right movement of the distortion baffle 121, so as to form different intake air distortion conditions, and 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 generation system of the present application can adopt a distortion simulation plate with the same connection structure form as the distortion baffle according to the requirements of the inlet flow field pressure map, and can directly replace the distortion baffle with different styles of distortion simulation plates, reducing the tediousness of adjusting the distortion index during the compressor inlet air distortion test, and can realize the real-time dynamic adjustment of the distortion index.

[0033] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An automatically adjustable multi-mode pressure distortion generation system, characterized in that, Comprising: A distortion generating device (10), a hydraulic system (20) and a control system (30), wherein: The distortion generating device (10) includes a sealed box body (11), a distortion plate (12) and a driving device (13). Pipe connection flanges (111) for connecting the intake passage (112) of the compressor test piece are provided on the front and rear of the sealed box body (11). The distortion plate (12) is arranged inside the sealed box body (11), and the driving device (13) is connected to the distortion 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 distortion plate (12) is controlled to move inside the sealed box body (11) through the control system (30), so as to block the intake passage (112) and realize the change of the inlet blockage ratio of the compressor test piece.

2. The automatically adjustable multi-mode pressure distortion generating system according to claim 1, wherein The distortion plate (12) includes a distortion baffle (121) for realizing different blockage ratio states at the inlet of the compressor test piece and a distortion simulation plate (122) for simulating different distortion indices of the inlet flow field. The distortion baffle (121) is a flat plate without 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, characterized in that, The size and distribution of the hole 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 generation system according to any one of claims 1 to 4, characterized in that, 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 arranged on the distortion plate (12) for measuring the moving displacement of the distortion plate (12). The control valve (34) is arranged on the hydraulic oil circuit of the driving device (13) for controlling the hydraulic oil circuit to realize the driving of the driving device (13). The control module (32) is connected to the displacement measurement sensor (33) and the control valve (34) for converting and communicating the 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 moving displacement of the distortion plate (12) measured by the displacement measurement sensor (33), and further realizing the driving of the driving 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, wherein It further includes a switching module (35), and the switching module (35) is connected to the control host (31) and the control module (32) for data exchange.

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