Fault control method and system for compressor test

Abstract

The present disclosure relates to a fault control method for a compressor test, which is directed to controlled objects including an exhaust regulating valve of a main gas system, an air extraction system regulating valve, adjustable guide vanes, and the rotational speed of a test piece, and performs corresponding fault control on each of the controlled objects when different levels of faults occur. The fault control method for the compressor test effectively responds to sudden faults or risks by controlling the controlled objects of the tester during the compressor test, thereby ensuring the integrity of the test piece and the tester equipment.

Description

Technical Field

[0001] This application relates to the technical field of aero-engine compressor test, and particularly to a control method and system for sudden failures or risks during compressor tests. Background Art

[0002] Classified by the tests of each component of an aero-engine, it can be divided into component tests and full-engine tests. Component tests mainly include: inlet duct tests, compressor tests, combustion chamber tests, afterburner tests, nozzle tests, accessory tests, and strength and vibration tests of parts and components. Compressor performance tests mainly measure compressor characteristic parameters, such as air flow rate, pressure ratio, efficiency, and surge point, at different speeds to verify whether the design and calculation are correct and reasonable, find out deficiencies, and facilitate modification and improvement of the design.

[0003] During the compressor test, different levels of failures or risks may occur suddenly. A complete set of control methods for coping with sudden failures or risks is used to control the controlled objects of the test rig to ensure the integrity of the test piece and the test rig equipment. These controlled objects of the test rig include the regulating valve for adjusting the pressure ratio of the main gas system exhaust, the regulating valve for adjusting the bleed rate of the bleed air system, the angle of the adjustable guide vane, the speed of the test piece, and so on.

[0004] Therefore, there is a need in this field for a control method and system that can effectively cope with sudden failures or risks in compressor component tests. Summary of the Invention

[0005] The technical solution of the present disclosure effectively copes with sudden failures or risks by controlling the controlled objects of the test rig during the compressor test, thereby ensuring the integrity of the test piece and the test rig equipment.

[0006] In an embodiment of the present disclosure, a fault control method for compressor tests is provided. For controlled objects including the exhaust regulating valve of the main gas system, the regulating valve of the bleed air system, the adjustable guide vane, and the speed of the test piece, corresponding fault control is performed on each controlled object when different levels of faults occur.

[0007] In another embodiment of the present disclosure, different levels of faults include: the first-level fault where the appearance of the test rig is abnormal, the second-level fault where the test piece is abnormal, the third-level fault where the test rig control is abnormal or the measured value is abnormal, and the fourth-level fault where deep stall or surge occurs during the test.

[0008] In yet another embodiment of the present disclosure, when a fourth-level fault occurs, an antisurge command is issued.

[0009] In another embodiment of the present disclosure, when a Class IV fault occurs at high speed, a combined antisurge command (Antisurge) and an emergency deceleration to idle command (EBI) are issued.

[0010] In yet another embodiment of the present disclosure, when a Class III fault occurs, an emergency deceleration to idle command (EBI) is issued.

[0011] In another embodiment of the present disclosure, when a Class II fault occurs, an emergency stop command (Estop) is triggered.

[0012] In yet another embodiment of the present disclosure, when a Class I fault occurs, an emergency power-off command (Eoff) is triggered.

[0013] In an embodiment of the present disclosure, a fault control system for a compressor test is provided, including a tester equipment control subsystem and an emergency stop subsystem. The fault control system performs corresponding fault control on each controlled object when different levels of faults occur for controlled objects including the exhaust regulating valve of the main gas system, the regulating valve of the bleed air system, the adjustable guide vane, and the speed of the test piece.

[0014] In another embodiment of the present disclosure, different levels of faults include: Class I fault with abnormal appearance of the tester, Class II fault with abnormality of the test piece, Class III fault with abnormal tester control or abnormal measured value, and Class IV fault with deep stall or surge during the test.

[0015] In yet another embodiment of the present disclosure, when a Class IV fault occurs, the tester equipment control subsystem executes an antisurge command (Antisurge).

[0016] In another embodiment of the present disclosure, when a Class IV fault occurs at high speed, the tester equipment control subsystem executes a combined antisurge command (Antisurge) at high speed and an emergency deceleration to idle command (EBI).

[0017] In yet another embodiment of the present disclosure, when a Class III fault occurs, the tester equipment control subsystem executes an emergency deceleration to idle command (EBI).

[0018] In another embodiment of the present disclosure, when a Class II fault occurs, the emergency stop subsystem executes an emergency stop command (Estop).

[0019] In yet another embodiment of the present disclosure, when a Class I fault occurs, the emergency stop subsystem executes an emergency power-off command (Eoff).

[0020] This summary is provided to introduce in a simplified form some concepts that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above summary of the disclosure and the following detailed description will be better understood when read in conjunction with the accompanying drawings. It should be noted that the drawings are only examples of the claimed invention. In the drawings, the same reference numerals represent the same or similar elements.

[0022] Figure 1 A flowchart showing a fault control method for a compressor test according to an embodiment of the present disclosure.

[0023] Figure 2 A fault control table showing corresponding fault control for a controlled object according to an embodiment of the present disclosure.

[0024] Figure 3 A flowchart showing the control process for a type-IV fault Ⅳ according to an embodiment of the present disclosure.

[0025] Figure 4 A flowchart showing the control process for a type-III fault Ⅲ according to another embodiment of the present disclosure.

[0026] Figure 5 A flowchart showing the control process for a type-II fault Ⅱ according to an embodiment of the present disclosure.

[0027] Figure 6 A flowchart showing the control process for a type-I fault Ⅰ according to an embodiment of the present disclosure.

[0028] Figure 7 A block diagram showing a fault control system for a compressor test according to an embodiment of the present disclosure.

[0029] Figure 8 An electrical diagram showing an emergency stop system Estop according to an embodiment of the present disclosure.

[0030] Figure 9 An electrical diagram showing an emergency power-off system Eoff according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] To make the above objects, features, and advantages of the present disclosure more apparent and understandable, the following provides a detailed description of the specific embodiments of the present disclosure in conjunction with the accompanying drawings.

[0032] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure. However, the present disclosure may be implemented in other ways different from those described herein. Therefore, the present disclosure is not limited by the specific embodiments disclosed below.

[0033] An aeroengine is the power that drives an aircraft to fly. Since it operates tens of thousands of meters in the air, at the same time, the structure of an aeroengine is extremely complex, with tens of thousands of parts. The working environment of the main components of the engine is extremely harsh, often in a working state of high temperature (up to nearly 2000 degrees Celsius), high pressure (dozens of atmospheres), and high-speed rotation (the rotational speed can reach tens of thousands of revolutions per minute). Therefore, before any aeroengine is officially put into use (in service), it is necessary to have a full understanding and knowledge of its performance, function, strength, and reliability through various tests in order to use it safely, effectively, and reasonably. The compressor test is one of the component tests of an aeroengine.

[0034] During the compressor test process, it is estimated that there will be the following faults of different levels:

[0035] 1) Class IV fault Ⅳ: Deep stall or surge occurs during the test;

[0036] 2) Class III fault Ⅲ: Abnormal control of the exhaust valve of the main gas system of the tester, the measured values of key measuring points of the tester reach the limit value or are abnormal, the measured values of the measuring points of the test piece measured by the data acquisition system reach the limit value, the bearing lubricating oil temperature or pressure of the test piece exceeds the limit value, etc.;

[0037] 3) Class II fault Ⅱ: Abnormal situations occur in the test piece, such as sudden changes in rotational speed, continuous over-limit of the dynamic stress of multiple-stage rotating and stationary blades and no obvious improvement in speed reduction, the tip clearance exceeds the alarm value for the first time, etc.;

[0038] 4) Class I fault Ⅰ: Abnormal situations appear on the appearance of the tester, such as parts falling off, smoking, sparking, abnormal noise, etc.

[0039] How to adopt different control methods for different faults, so as to ensure both the running safety of the test piece and the integrity of the tester equipment, and at the same time improve the efficiency and reliability of the test, is an urgent problem to be solved in this field.

[0040] The present disclosure proposes a control method and system for different levels of faults in the compressor test. Through the equipment control subsystem and the emergency stop subsystem, different control methods can be executed on the tester for different levels of faults.

[0041] Figure 1 The flowchart of a fault control method 100 for compressor test according to an embodiment of the present disclosure is shown. In the following description of the fault control method 100 for compressor test, it will be combined with Figure 2Describe the fault control table in it.

[0042] In the test preparation stage of 102, preset the states of each controlled object of the tester and the test piece.

[0043] After entering the pre-test preparation stage, set the states of the controlled objects including the exhaust regulating valve of the main gas system, the air bleed system regulating valve, the adjustable guide vane, and the rotational speed of the test piece under different fault control modes on the man-machine operation interface.

[0044] a) Preset whether the exhaust valve of the main gas system is controlled in the emergency reduction to idle (EBI) mode; preset the increased opening of the valve of the exhaust valve of the main gas system in the anti-surge mode; preset the relationship table between the valve opening of the exhaust valve of the main gas system and the relative converted rotational speed.

[0045] b) Preset the control mode (fully open or maintained) of the air bleed system regulating valve in the anti-surge mode, and the control modes (fully open or BPT, where "BPT" is automatically adjusted according to the preset relationship table between the control value and the relative converted rotational speed) in the emergency reduction to idle (EBI), emergency stop (Estop), and emergency power-off (Eoff) modes; preset the relationship table between the air bleed rate of the air bleed system regulating valve and the relative converted rotational speed.

[0046] c) Preset the control modes (fully closed or BPT) of the adjustable guide vane in the emergency reduction to idle (EBI), emergency stop (Estop), and emergency power-off (Eoff) modes; preset the relationship table between the angle of the adjustable guide vane and the relative converted rotational speed.

[0047] d) Preset the reduction rate of the rotational speed of the test piece in the emergency reduction to idle (EBI) mode.

[0048] In 104, judge the fault level when a fault occurs.

[0049] As mentioned above, the faults that occur can be divided into 4 fault levels: 1) Class IV fault Ⅳ: Deep stall or surge occurs during the test; 2) Class III fault Ⅲ: Abnormal control of the exhaust valve of the main gas system of the tester, the values of key measuring points of the tester reach the limit or are abnormal, the values of measuring points of the test piece reach the limit, and the temperature or pressure of the bearing lubricating oil of the test piece exceeds the limit, etc.; 3) Class II fault Ⅱ: Abnormal situation occurs to the test piece; and 4) Class I fault Ⅰ: Abnormal situation appears on the appearance of the tester.

[0050] In 106, perform fault control on each controlled object for different levels of faults.

[0051] In an embodiment of the present disclosure, when a fourth type of failure IV, i.e., deep stall or surge, occurs during the test, an antisurge command is sent to the equipment control system.

[0052] In another embodiment of the present disclosure, when conducting a surge-in test at high speed, there is a situation where the compressor test piece cannot complete the antisurge command one or two times due to deep surge and the antisurge is successful. In this case, a combined antisurge command (Antisurge) and an emergency speed reduction to idle (EBI) command can be sent to the equipment control system.

[0053] In yet another embodiment of the present disclosure, when a third type of failure III occurs during the test, i.e., abnormal control of the exhaust valve of the main gas system of the tester, the measured values of key measuring points of the tester reach the limit value or are abnormal, the measured values of the test piece measuring points measured by the data acquisition system reach the limit value, the bearing lubricating oil temperature or pressure of the test piece exceeds the limit value, etc., an emergency speed reduction to idle command (EBI) is sent to the equipment control system.

[0054] In another embodiment of the present disclosure, when a second type of failure II occurs during the test, i.e., an abnormal situation occurs in the test piece, an emergency stop command (Estop) of the emergency stop system is triggered.

[0055] In yet another embodiment of the present disclosure, when a first type of failure I occurs during the test, i.e., an abnormal situation occurs in the tester, an emergency power-off command (Eoff) of the emergency stop system is triggered.

[0056] At 108, corresponding fault control is performed on the exhaust regulating valve of the main gas system.

[0057] In an embodiment of the present disclosure, after the equipment control system receives the antisurge command (Antisurge), it executes the opening of the exhaust regulating valve of the main gas system (the opening value of the valve to increase the opening can be set) (see the table in Figure 2 ).

[0058] In another embodiment of the present disclosure, after the equipment control system receives the combined antisurge command (Antisurge) and the emergency speed reduction to idle (EBI) command at high speed, it only executes the opening of the exhaust regulating valve of the main gas system under the antisurge command.

[0059] In another embodiment of the present disclosure, after the equipment control system receives the emergency speed reduction to idle command (EBI), it executes the automatic adjustment of the exhaust regulating valve of the main gas system according to the relationship table of the preset valve opening and the relative converted speed (see the table in Figure 2 ).

[0060] In yet another embodiment of the present disclosure, after the emergency stop system receives the emergency stop command (Estop), the equipment control system executes the full opening of the exhaust regulating valve of the main gas system (see Figure 2(in the table).

[0061] In another embodiment of the present disclosure, after the emergency stop system receives the emergency power-off instruction (Eoff), the equipment control system disconnects the high-voltage power supply of the variable frequency speed regulation system and fully opens the exhaust regulating valve of the main air system (see Figure 2 (in the table).

[0062] At 110, perform corresponding fault control on the air bleed system regulating valve.

[0063] In one embodiment of the present disclosure, after the equipment control system receives the anti-surge instruction (Antisurge), it performs the control operation of fully opening the valve of the air bleed system regulating valve or maintaining the current air bleed rate (see Figure 2 (in the table).

[0064] In another embodiment of the present disclosure, after the equipment control system receives the combined anti-surge instruction (Antisurge) at high speed and the emergency deceleration to idle (EBI) instruction, it only performs the control of the air bleed pipeline regulating valve under the emergency deceleration to idle instruction.

[0065] In another embodiment of the present disclosure, after the equipment control system receives the emergency deceleration to idle instruction (EBI), it fully opens the air bleed pipeline regulating valve or automatically adjusts according to the relationship table of the preset air bleed rate and the relative converted speed (see Figure 2 (in the table).

[0066] In yet another embodiment of the present disclosure, after the emergency stop system receives the emergency stop instruction (Estop), the equipment control system fully opens the air bleed pipeline regulating valve or automatically adjusts according to the relationship table of the preset air bleed rate and the relative converted speed (see Figure 2 (in the table).

[0067] In another embodiment of the present disclosure, after the emergency stop system receives the emergency power-off instruction (Eoff), the equipment control system disconnects the high-voltage power supply of the variable frequency speed regulation system and fully opens the air bleed pipeline regulating valve or automatically adjusts according to the relationship table of the preset air bleed rate and the relative converted speed (see Figure 2 (in the table).

[0068] At 112, perform corresponding fault control on the adjustable guide vane.

[0069] In one embodiment of the present disclosure, after the equipment control system receives the emergency deceleration to idle instruction (EBI), it fully closes the adjustable guide vane to the pneumatic limit angle or automatically adjusts according to the relationship table of the preset angle value and the relative converted speed (see Figure 2 (in the table).

[0070] In another embodiment of the present disclosure, after the equipment control system receives the combined antisurge command at high speed and the emergency speed reduction to idle (EBI) command, it only executes the control of the adjustable guide vane under the emergency speed reduction to idle command.

[0071] In another embodiment of the present disclosure, after the emergency stop system receives the emergency stop command (Estop), the equipment control system executes the full closing of the adjustable guide vane to the pneumatic limit angle or automatically adjusts according to the relationship table of the preset angle value and the relative conversion speed (see the table in Figure 2 .

[0072] In yet another embodiment of the present disclosure, after the emergency stop system receives the emergency power-off command (Eoff), the equipment control system executes the full closing of the adjustable guide vane to the pneumatic limit (see the table in Figure 2 .

[0073] At 116, corresponding fault control is performed on the rotational speed of the test piece.

[0074] In an embodiment of the present disclosure, after the equipment control system receives the emergency speed reduction to idle command (EBI), it executes the test piece to reduce the speed to the idle speed at a preset rate (see the table in Figure 2 .

[0075] In another embodiment of the present disclosure, after the equipment control system receives the combined antisurge command at high speed and the emergency speed reduction to idle (EBI) command, it only executes the control of the rotational speed of the test piece under the emergency speed reduction to idle command.

[0076] In another embodiment of the present disclosure, after the emergency stop system receives the emergency stop command (Estop), the equipment control system executes the test piece to reduce the speed to 167 rpm at a rate of 100 rpm / s (see the table in Figure 2 .

[0077] In yet another embodiment of the present disclosure, after the emergency stop system receives the emergency power-off command (Eoff), the equipment control system executes the test piece to reduce the speed to 0 rpm in an inertial manner (see the table in Figure 2 .

[0078] Those skilled in the art can understand that the above steps 108, 110, 112, and 116 can be carried out in parallel or serially.

[0079] The above-described compressor test fault control method disclosed in the present disclosure can adopt different control methods to cope with different sudden faults, which can not only ensure the operation safety of the test piece and the integrity of the test equipment, prevent further damage to the test piece or the tester and the aggravation of the fault, but also improve the effectiveness of the test, shorten the test time, and reduce the test cost in the high-speed antisurge test project.

[0080] Figure 3 A flowchart showing the control process for a type-IV fault Ⅳ according to an embodiment of the present disclosure.

[0081] During the test preparation stage, preset the control modes of the main air system exhaust valve, bleed air system regulating valve, adjustable guide vane, and speed by the equipment control system when a fault occurs during the test process (see 302 in Figure 3 ).

[0082] When a type-IV fault Ⅳ occurs during the test process (306), the test anti-surge device monitors that the compressor test piece has stalled or surges, and sends a switch quantity signal with a passive contact to the equipment control system. The equipment control system performs the anti-surge function operation (308), that is, opens the main air system exhaust valve according to the preset opening value of increasing the opening, and controls the bleed air system regulating valve, adjustable guide vane, and speed according to the control mode under the preset anti-surge. After executing one or two anti-surge commands, select whether to execute the emergency reduction to idle (EBI) function operation (310).

[0083] If the stall or surge of the compressor test piece is eliminated, select not to execute the emergency reduction to idle (EBI) function operation (No in 310).

[0084] If the compressor test piece has deep surge, and after executing one or two anti-surge commands, the stall or surge has not been eliminated, select to execute the emergency reduction to idle (EBI) function operation (Yes in 310), execute the emergency reduction to idle (EBI) function operation (312), select that the main air system exhaust regulating valve is not controlled by the emergency reduction to idle (EBI) method (No in 314). At this time, the equipment control system simultaneously executes the anti-surge and emergency reduction to idle (EBI) function operations. The emergency reduction to idle command only executes the control of the bleed air system regulating valve, adjustable guide vane, and speed (318), and the opening of the main air system exhaust regulating valve is only executed under the anti-surge command (324).

[0085] If the compressor test piece has deep surge, and after executing one or two anti-surge commands, the stall or surge has not been eliminated (No in 310), execute the emergency reduction to idle (EBI) function operation (312), select that the main air system exhaust valve is controlled by the emergency reduction to idle (EBI) method (Yes in 314). At this time, the equipment control system only executes the emergency reduction to idle (EBI) function operation, and the main air system exhaust regulating valve, bleed air system regulating valve, adjustable guide vane, and speed are controlled according to the control mode under the preset emergency reduction to idle (EBI) (316).

[0086] When the stall or surge of the test piece is eliminated (320), the stall or surge signal of the test piece will not be sent by the surge judgment device, and the emergency deceleration to idle (EBI) instruction (322) can be closed, and the control operation of the fourth type of fault Ⅳ ends.

[0087] Figure 4 A flowchart showing the control process of the third type of fault Ⅲ according to another embodiment of the present disclosure is shown.

[0088] During the test preparation stage, the control modes of the main air system exhaust valve, bleed air system regulating valve, adjustable guide vane, and speed of the equipment control system when a fault occurs during the test process are preset (see Figure 4 402 in

[0089] When the third type of fault Ⅲ (406) occurs during the test process, an emergency deceleration to idle (EBI) instruction (408) is triggered, and the equipment control system performs the emergency deceleration to idle (EBI) function operation.

[0090] If it is selected that the main air system exhaust regulating valve is not controlled in the emergency deceleration to idle (EBI) mode (No in 410), at this time, the equipment control system controls the bleed air system regulating valve and the adjustable guide vane according to the preset control mode in the emergency deceleration to idle (EBI) mode, and controls the speed according to the preset deceleration rate (412).

[0091] If it is selected that the main air system exhaust regulating valve is controlled in the emergency deceleration to idle (EBI) mode (Yes in 410), at this time, the equipment control system controls the main air system exhaust regulating valve, the bleed air system regulating valve, and the adjustable guide vane according to the preset control mode in the emergency deceleration to idle (EBI) mode, and controls the speed according to the preset deceleration rate (414).

[0092] When the third type of fault Ⅲ is eliminated, the emergency deceleration to idle (EBI) instruction can be closed or the speed deceleration reaches the idle speed (416), and the control operation of the third type of fault Ⅲ ends.

[0093] Figure 5 A flowchart showing the control process of the second type of fault Ⅱ according to an embodiment of the present disclosure is shown.

[0094] During the test preparation stage, the control modes of the main air system exhaust valve, bleed air system regulating valve, adjustable guide vane, and speed of the equipment control system when a fault occurs during the test process are preset (see Figure 5 502 in

[0095] When a type-II fault Ⅱ (504) occurs during the test, the operator triggers an emergency stop (Estop) instruction (506). The equipment control system performs an emergency stop (Estop) function operation (508). At the same time, after receiving the emergency stop instruction, the Estop safety relay sends a digital signal of dry contact type to the variable-frequency equipment of the equipment control system (510).

[0096] The rotational speed of the test piece decreases at a deceleration rate of 100 rpm / s. The exhaust control valve of the main gas system, the air extraction system control valve, and the adjustable guide vane are controlled according to the control mode under the preset emergency stop (Estop) mode (512).

[0097] The rotational speed of the test piece decreases to 167 rpm (516), and the control operation for the type-II fault Ⅱ ends.

[0098] Figure 6 The flowchart showing the control process for a type-I fault Ⅰ according to an embodiment of the present disclosure is presented.

[0099] During the test preparation stage, the control modes of the exhaust valve of the main gas system, the air extraction system control valve, the adjustable guide vane, and the rotational speed of the equipment control system when a fault occurs during the test are preset (see Figure 6 602 therein).

[0100] When a type-I fault Ⅰ (604) occurs during the test, an emergency power-off (Eoff) instruction (606) is automatically triggered. The equipment control system performs an emergency power-off (Eoff) function operation (608). At the same time, after receiving the emergency power-off (Eoff) instruction, the Eoff safety relay sends a digital signal of dry contact type to the variable-frequency equipment of the equipment control system (610).

[0101] The main supply high voltage of 10 kV of the variable-frequency equipment of the equipment control system is disconnected. The test piece decelerates due to inertia, and the exhaust control valve of the main gas system, the air extraction system control valve, and the adjustable guide vane are controlled according to the control mode under the preset emergency power-off (Eoff) mode (612).

[0102] The test piece stops rotating (616), and the control operation for the type-I fault Ⅰ ends.

[0103] Figure 7 The block diagram of a fault control system 700 for a compressor test according to an embodiment of the present disclosure is presented. The following description of the fault control system 700 for a compressor test will be combined with Figure 8 and Figure 9 for elaboration.

[0104] Figure 8 The electrical diagram of the emergency stop system Estop according to an embodiment of the present disclosure is presented. Figure 9An electrical diagram showing the emergency power-off system Eoff according to an embodiment of the present disclosure.

[0105] The fault control system 700 for compressor testing includes a tester equipment control subsystem 702 and an emergency stop subsystem 706. Different levels of fault control are implemented by the tester equipment control subsystem 702 and the emergency stop subsystem 706, mainly for different controlled objects (main air system exhaust regulating valve 708, bleed air system regulating valve 710, adjustable guide vane 712, test piece rotation speed 716) under different fault control methods. Among them, the tester equipment control subsystem 702 mainly consists of a PC, PLC hardware and software, and the emergency stop subsystem 706 mainly consists of hardware such as a mushroom head emergency button and a safety relay.

[0106] In an embodiment of the present disclosure, for the control of emergency stop, the emergency stop subsystem 706 is configured with an emergency stop module 706-1 composed of hardware such as a mushroom head emergency button and a safety relay (see the specific electrical diagram in Figure 8 ), effectively sending the emergency stop signal to the frequency conversion equipment of the equipment control system to reduce the rotation speed at a reduction rate of 100 rpm / s at the maximum capacity of the equipment. After stopping and troubleshooting, restore the emergency button and press the emergency stop reset button to cancel the emergency stop instruction.

[0107] In another embodiment of the present disclosure, for the control of emergency power-off, the emergency stop subsystem 706 is configured with a power-off emergency stop module 706-2 composed of hardware such as a rotary button and a safety relay (see the specific electrical diagram in Figure 9 ), effectively sending the power-off emergency stop signal to the frequency conversion equipment of the equipment control system, and the vacuum circuit breaker in the main power switch cabinet of the frequency conversion equipment is disconnected to stop power supply to the frequency conversion equipment.

[0108] The above-mentioned compressor test fault control system disclosed in the present disclosure can adopt different control methods by the tester equipment control subsystem and the emergency stop subsystem to cope with different sudden faults, which can not only ensure the operation safety of the test piece and the integrity of the test equipment, prevent further damage to the test piece or the tester and the aggravation of the fault, but also improve the effectiveness of the test, shorten the test time and reduce the test cost in the high-speed anti-surge test project.

[0109] The various steps and modules of the fault control method and system for compressor testing described above can be implemented in hardware, software, or a combination thereof. If implemented in hardware, the various illustrative steps, modules, and circuits described in connection with the present invention can be implemented or executed using a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic components, hardware components, or any combination thereof. The general-purpose processor can be a processor, a microprocessor, a controller, a microcontroller, or a state machine, etc. If implemented in software, the various illustrative steps, modules described in connection with the present invention can be stored on or transmitted as one or more instructions or codes on a computer-readable medium. The software modules for implementing the various operations of the present invention can reside in a storage medium, such as RAM, flash memory, ROM, EPROM, EEPROM, registers, a hard disk, a removable disk, a CD-ROM, cloud storage, etc. The storage medium can be coupled to the processor so that the processor can read from / write to the storage medium and execute the corresponding program modules to implement the various steps of the present invention. Moreover, the software-based embodiments can be uploaded, downloaded, or remotely accessed through appropriate communication means. Such appropriate communication means include, for example, the Internet, the World Wide Web, an intranet, a software application, a cable (including an optical fiber cable), magnetic communication, electromagnetic communication (including RF, microwave, and infrared communication), electronic communication, or other such communication means.

[0110] It should also be noted that these embodiments may be described as processes depicted as flowcharts, flow diagrams, structural diagrams, or block diagrams. Although a flowchart may describe the operations as a sequential process, many of these operations can be performed in parallel or concurrently. Additionally, the order of these operations can be rearranged.

[0111] The disclosed method, apparatus, and system should not be limited in any way. On the contrary, the present invention encompasses all novel and non-obvious features and aspects of the various disclosed embodiments (individual and various combinations and sub-combinations of each other). The disclosed method, apparatus, and system are not limited to any specific aspect or feature or their combination, and no particular advantage or solution to a specific or all technical problems is required for any of the disclosed embodiments.

[0112] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can make many changes without departing from the spirit and scope protected by the present invention and the claims, and all of these fall within the protection scope of the present invention.

Claims

1. A fault control method for compressor tests, characterized in that, For controlled objects including the exhaust regulating valve of the main gas system, the regulating valve of the bleed air system, the adjustable guide vane, and the rotational speed of the test piece, corresponding fault controls are performed on each of the controlled objects when different levels of faults occur, where the different levels of faults include: the first-level fault of abnormal appearance of the tester, the second-level fault of abnormal appearance of the test piece, the third-level fault of abnormal control of the tester or abnormal measured value, and the fourth-level fault of deep stall or surge during the test, and where: When the fourth-level fault occurs, an antisurge command (Antisurge) is issued; When the third-level fault occurs, an emergency deceleration to idle command (EBI) is issued; When the second-level fault occurs, an emergency stop command (Estop) is triggered; When the first-level fault occurs, an emergency power-off command (Eoff) is triggered.

2. The fault control method according to claim 1, wherein When the fourth-level fault occurs at high rotational speed, a combined antisurge command (Antisurge) and emergency deceleration to idle command (EBI) at high rotational speed are issued.

3. A fault control system for compressor testing, comprising a tester equipment control subsystem and an emergency stop subsystem, characterized in that, The fault control system performs corresponding fault controls on each of the controlled objects including the exhaust regulating valve of the main gas system, the regulating valve of the bleed air system, the adjustable guide vane, and the rotational speed of the test piece when different levels of faults occur, where the different levels of faults include: the first-level fault of abnormal appearance of the tester, the second-level fault of abnormal appearance of the test piece, the third-level fault of abnormal control of the tester or abnormal measured value, and the fourth-level fault of deep stall or surge during the test, and where: When the fourth-level fault occurs, the tester equipment control subsystem executes the antisurge command (Antisurge); When the third-level fault occurs, the tester equipment control subsystem executes the emergency deceleration to idle command (EBI); When the second-level fault occurs, the emergency stop subsystem executes the emergency stop command (Estop); When the first-level fault occurs, the emergency stop subsystem executes the trigger emergency power-off command (Eoff).

4. The fault control system according to claim 3, characterized in that, When the fourth-level fault occurs at high rotational speed, the tester equipment control subsystem executes the combined antisurge command (Antisurge) and emergency deceleration to idle command (EBI) at high rotational speed.

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