Power turbine overspeed protection method and device, electronic equipment and storage medium

Abstract

The application discloses a power turbine overspeed protection method and device, electronic equipment and storage medium, and the power turbine overspeed protection method comprises the following steps: S1, detecting the speed of a reducer unit shaft and the speed of a power turbine shaft rear end through a control system; S2, judging whether the difference between the speed of the reducer unit shaft and the speed of the power turbine shaft rear end exceeds a preset limit value through the control system, if yes, turning to step S4, if no, turning to step S3; S3, judging whether the speed of an aero-engine reaches an overspeed condition through the control system, if yes, turning to step S4, if no, turning to step S1; S4, performing overspeed protection on a power turbine rotor and cutting off fuel supply. The power turbine overspeed protection method realizes cutting off the fuel supply of the engine in a short time after the power turbine shaft is broken, and achieves the effect of protecting the engine rotor.

Description

Overspeed protection methods, devices, electronic equipment and storage media for power turbines Technical Field

[0001] This invention relates to the field of aero-engine technology, and in particular, to a method for protecting a power turbine from overspeed. Furthermore, this invention also relates to an apparatus, electronic device, and storage medium incorporating the aforementioned method for protecting a power turbine from overspeed. Background Technology

[0002] Turbine overspeed protection is a crucial function of aero-engine control systems, directly impacting engine safety and reliability. With advancements in aero-engine control technology, speed sensors transmit speed signals to the electronic controller, where an independent overspeed protection device calculates and analyzes the data to determine whether to cut off fuel supply to protect the engine rotor and prevent further damage.

[0003] Referring to Figure 1, taking an auxiliary power unit overspeed detection device and method as an example, in order to effectively realize the overspeed protection control of the auxiliary power unit, the device includes a speed sensor, a speed signal conditioning circuit, an independent hardware overspeed detection circuit, and a CPU software overspeed detection unit; the speed signal conditioning circuit conditions the speed signal and inputs it to the hardware overspeed detection circuit and the CPU software overspeed detection unit; when the auxiliary power unit overspeed is detected, an overspeed control signal is output to control the closure of the fuel supply solenoid valve of the auxiliary power unit, ensuring that the auxiliary power unit can reliably and accurately realize overspeed protection control within the entire operating envelope.

[0004] Referring to Figure 2, taking a power turbine overspeed protection method, device, electronic equipment and storage medium as an example, the control system detects the power turbine rotor speed and torque in real time, and periodically collects Np, Mkp, ΔNp, ΔMkp and V of the power turbine rotor; preset judgment logic, and judges and controls whether the power turbine rotor is overspeeding according to the judgment result.

[0005] However, after the engine power turbine shaft breaks, the speed at the load end drops, and the speed sensor installed at this location cannot receive the overspeed signal and transmit it to the electronic controller. Therefore, when using the traditional power turbine overspeed protection method, it is impossible to cut off the engine fuel supply in a short time after the power turbine shaft breaks, thus protecting the engine rotor. Summary of the Invention

[0006] This invention provides a method, device, electronic equipment, and storage medium for protecting a power turbine from overspeed, in order to solve the technical problem that traditional power turbine overspeed protection methods cannot cut off the engine fuel supply in a short time after the power turbine shaft breaks, thus protecting the engine rotor.

[0007] According to one aspect of the present invention, a method for overspeed protection of a power turbine is provided, comprising:

[0008] S1. The speed of the reducer unit's propeller shaft and the speed of the rear end of the power turbine shaft are detected by the control system;

[0009] S2. The control system determines whether the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft exceeds the preset limit. If yes, proceed to step S4; otherwise, proceed to step S3.

[0010] S3. Determine whether the engine speed has reached the overspeed condition through the control system. If yes, proceed to step S4; otherwise, proceed to step S1.

[0011] S4. Perform over-speed protection on the power turbine rotor and cut off the fuel supply.

[0012] As a further improvement to the above technical solution, step S3 includes:

[0013] The control system determines whether the speed of the reducer unit propeller shaft exceeds the first preset threshold and whether the speed of the rear end of the power turbine shaft exceeds the second preset threshold. If the speed of the reducer unit propeller shaft exceeds the first preset threshold or the speed of the rear end of the power turbine shaft exceeds the second preset threshold, proceed to step S4; if the speed of the reducer unit propeller shaft does not exceed the first preset threshold and the speed of the rear end of the power turbine shaft does not exceed the second preset threshold, proceed to step S1.

[0014] As a further improvement to the above technical solution, the power turbine overspeed protection method further includes:

[0015] S31. The control system determines whether the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft is greater than the preset fault value. If yes, record 'risk of shaft breakage exists' and proceed to step S311. If no, proceed to step S32.

[0016] S311. The control system determines whether the speed of the reducer unit propeller shaft exceeds the first preset threshold, and the control system determines whether the speed of the rear end of the power turbine shaft exceeds the second preset threshold. If the speed of the reducer unit propeller shaft exceeds the first preset threshold or the speed of the rear end of the power turbine shaft exceeds the second preset threshold, proceed to step S4; if the speed of the reducer unit propeller shaft does not exceed the first preset threshold and the speed of the rear end of the power turbine shaft does not exceed the second preset threshold, proceed to step S312.

[0017] S312. The control system determines the duration of the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft. If the duration is greater than the preset fault value and less than or equal to the preset limit value, a fault alarm is triggered and the fuel flow is limited. If the duration is less than the preset period, proceed to step S1.

[0018] S32. The control system determines whether the speed of the reducer unit propeller shaft exceeds the first preset threshold, and the control system determines whether the speed of the rear end of the power turbine shaft exceeds the second preset threshold. If the speed of the reducer unit propeller shaft exceeds the first preset threshold or the speed of the rear end of the power turbine shaft exceeds the second preset threshold, proceed to step S4; if the speed of the reducer unit propeller shaft does not exceed the first preset threshold and the speed of the rear end of the power turbine shaft does not exceed the second preset threshold, proceed to step S1.

[0019] As a further improvement to the above technical solution, the power turbine overspeed protection method further includes:

[0020] The first preset threshold and the second preset threshold are set to the same value.

[0021] As a further improvement to the above technical solution, the control system includes a first speed sensor and a second speed sensor respectively disposed on the rear end of the reducer unit propeller shaft and the power turbine shaft, and an electronic controller electrically connected to the first speed sensor and the second speed sensor respectively. The electronic controller is used to receive the first speed signal fed back by the first speed sensor and the second speed signal fed back by the second speed sensor.

[0022] As a further improvement to the above technical solution, the power turbine overspeed protection method further includes:

[0023] The electronic controller receives the first speed signal and the second speed signal, and processes the first speed signal and the second speed signal respectively.

[0024] As a further improvement to the above technical solution, the power turbine overspeed protection method further includes:

[0025] The preset limits are calculated and determined based on the state parameters of the current engine model during the over-revving test when the shaft breaks.

[0026] According to another aspect of the present invention, an overspeed protection device for an aircraft engine power turbine is also provided, comprising:

[0027] The detection and acquisition module is used to detect the speed of the propeller shaft of the reducer unit and feed back the first speed signal, and to detect the speed of the rear end of the power turbine shaft and feed back the second speed signal.

[0028] The judgment and control module is used to output judgment results based on the first speed signal and the second speed signal fed back by the detection and acquisition module, and to control the aero-engine according to the judgment results: when the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft exceeds the preset limit or the speed of the aero-engine reaches the over-speed condition, the power turbine rotor is protected against over-speed and the fuel supply is cut off.

[0029] According to another aspect of the present invention, an electronic device is also provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the power turbine overspeed protection method as described above.

[0030] According to another aspect of the present invention, a storage medium is also provided, the storage medium including a stored program, which, when the program is running, controls the device where the storage medium is located to perform the steps of the power turbine overspeed protection method as described above.

[0031] The present invention has the following beneficial effects:

[0032] During the test run of the power turbine rotor, this power turbine overspeed protection method detects the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft, thus obtaining the speeds of the front and rear ends of the power turbine shaft. When the difference between the detected speed signals at the front and rear ends reaches a preset limit, the fuel supply is cut off to control the engine and shut down for protection. In the event of a power turbine shaft breakage, the abnormal speed signal can be detected immediately, and automatic shutdown control is executed to ensure that the rotor speed does not continue to rise after the shaft breakage, protecting the engine rotor and greatly reducing the risk of further engine damage. Conversely, if the speed difference between the front and rear ends of the power turbine shaft does not exceed the preset limit, the conventional overspeed protection method is used. When the detected aero-engine speed reaches the overspeed condition, the power turbine rotor is protected against overspeed and the fuel supply is cut off. This power turbine overspeed protection method achieves timely shutdown when the power turbine rotor reaches the overspeed condition, avoiding disassembly and inspection, resulting in faster testing progress and no need to replace the power turbine rotor, reducing costs. It also significantly reduces the risk of damage to the engine and aircraft, demonstrating strong practicality. Furthermore, it achieves the effect of cutting off the engine fuel supply shortly after the power turbine shaft breaks, thus protecting the engine rotor.

[0033] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0034] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0035] Figure 1 is a schematic diagram of an existing auxiliary power unit overspeed detection device;

[0036] Figure 2 is a flowchart of the existing power turbine rotor test control method;

[0037] Figure 3 is a schematic diagram of the fracture risk of the engine power turbine structure according to a preferred embodiment of the present invention;

[0038] Figure 4 is a flowchart of the power turbine overspeed protection method according to a preferred embodiment of the present invention. Detailed Implementation

[0039] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0040] Figure 3 is a schematic diagram of the risk of fracture of the engine power turbine structure according to a preferred embodiment of the present invention; Figure 4 is a flowchart of the power turbine over-speed protection method according to a preferred embodiment of the present invention.

[0041] As shown in Figures 3 and 4, the power turbine overspeed protection method of this embodiment includes:

[0042] S1. The speed of the reducer unit's propeller shaft and the speed of the rear end of the power turbine shaft are detected by the control system;

[0043] Referring to the structure of a certain engine power turbine system in Figure 3, it consists of four parts. The possible locations for breakage are: the reducer unit propeller shaft, the diaphragm coupling, the power turbine shaft, and the spline connecting the disc shaft. The speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft are detected by installing speed sensors after the reducer unit propeller shaft and the power turbine shaft, respectively.

[0044] S2. The control system determines whether the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft exceeds the preset limit. If yes, proceed to step S4; otherwise, proceed to step S3.

[0045] S3. Determine whether the engine speed has reached the overspeed condition through the control system. If yes, proceed to step S4; otherwise, proceed to step S1.

[0046] S4. Perform over-speed protection on the power turbine rotor and cut off the fuel supply.

[0047] Understandably, during the test run of the power turbine rotor, this power turbine overspeed protection method detects the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft, thus obtaining the speeds of the front and rear ends of the power turbine shaft. When the difference between the detected speed signals reaches a preset limit, the fuel supply is cut off to control the engine and shut down for protection. In the event of a power turbine shaft breakage, the abnormal speed signal can be detected immediately, and automatic shutdown control is executed to ensure that the rotor speed does not continue to rise after the shaft breakage, protecting the engine rotor and significantly reducing the risk of further engine damage. Conversely, if the speed difference between the front and rear ends of the power turbine shaft does not exceed the preset limit, the conventional overspeed protection method is used. When the detected aero-engine speed reaches the overspeed condition, the power turbine rotor is protected against overspeed and the fuel supply is cut off. This power turbine overspeed protection method achieves timely shutdown when the power turbine rotor reaches the overspeed condition, avoiding disassembly and inspection, resulting in faster testing progress and no need to replace the power turbine rotor, reducing costs. It also significantly reduces the risk of damaging the engine and aircraft, demonstrating strong practicality. Furthermore, it achieves the effect of cutting off the engine fuel supply shortly after the power turbine shaft breaks, thus protecting the engine rotor.

[0048] In some preferred embodiments, step S3 includes:

[0049] The control system determines whether the speed of the reducer unit propeller shaft exceeds the first preset threshold and whether the speed of the rear end of the power turbine shaft exceeds the second preset threshold. If the speed of the reducer unit propeller shaft exceeds the first preset threshold or the speed of the rear end of the power turbine shaft exceeds the second preset threshold, proceed to step S4; if the speed of the reducer unit propeller shaft does not exceed the first preset threshold and the speed of the rear end of the power turbine shaft does not exceed the second preset threshold, proceed to step S1.

[0050] It is understood that in this embodiment, the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft are detected simultaneously and then it is determined whether the two exceed the preset threshold. If the speed exceeds the threshold at either point, it is determined that the power turbine rotor is over-rotating, and over-rotation protection is performed. If no over-rotation is detected, the process returns to step S1 for looping and continuous detection.

[0051] In some preferred embodiments, the power turbine overspeed protection method further includes:

[0052] S31. The control system determines whether the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft is greater than the preset fault value. If yes, record 'risk of shaft breakage exists' and proceed to step S311. If no, proceed to step S32.

[0053] S311. The control system determines whether the speed of the reducer unit propeller shaft exceeds the first preset threshold, and the control system determines whether the speed of the rear end of the power turbine shaft exceeds the second preset threshold. If the speed of the reducer unit propeller shaft exceeds the first preset threshold or the speed of the rear end of the power turbine shaft exceeds the second preset threshold, proceed to step S4; if the speed of the reducer unit propeller shaft does not exceed the first preset threshold and the speed of the rear end of the power turbine shaft does not exceed the second preset threshold, proceed to step S312.

[0054] S312. The control system determines the duration of the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft. If the duration is greater than the preset fault value and less than or equal to the preset limit value, a fault alarm is triggered and the fuel flow is limited. If the duration is less than the preset period, proceed to step S1.

[0055] S32. The control system determines whether the speed of the reducer unit propeller shaft exceeds the first preset threshold, and the control system determines whether the speed of the rear end of the power turbine shaft exceeds the second preset threshold. If the speed of the reducer unit propeller shaft exceeds the first preset threshold or the speed of the rear end of the power turbine shaft exceeds the second preset threshold, proceed to step S4; if the speed of the reducer unit propeller shaft does not exceed the first preset threshold and the speed of the rear end of the power turbine shaft does not exceed the second preset threshold, proceed to step S1.

[0056] It should be understood that the preset fault value is less than the preset limit. When the difference between the speed of the reducer unit impeller shaft and the speed of the rear end of the power turbine shaft is less than the preset limit, if the difference between the speed of the reducer unit impeller shaft and the speed of the rear end of the power turbine shaft is within the range of the preset fault value and the preset limit, the system records "risk of shaft breakage" to accurately determine the fault point during subsequent inspection and troubleshooting, thereby improving troubleshooting efficiency. Within the above range, the system still judges whether the speed of the reducer unit impeller shaft exceeds the first preset threshold and whether the speed of the rear end of the power turbine shaft exceeds the second preset threshold. If over-speed occurs, over-speed protection is implemented. If the difference between the speed of the reducer unit impeller shaft and the speed of the rear end of the power turbine shaft is within the range of the preset fault value and the preset limit for a continuous period of a preset period without over-speed, a fault alarm is triggered and the fuel flow is limited to remove the engine from the shaft breakage risk condition, effectively ensuring the continuity of the test run and reducing the test run risk.

[0057] In this embodiment, the preset period is D communication cycles, and the value of D is determined according to actual needs.

[0058] In some preferred embodiments, the power turbine overspeed protection method further includes:

[0059] The threshold that is set to the same value as the first preset threshold and the second preset threshold is the overspeed protection threshold.

[0060] In some preferred embodiments, the control system includes a first speed sensor disposed on the propeller shaft of the reducer unit and a second speed sensor disposed on the rear end of the power turbine shaft, and an electronic controller electrically connected to the first speed sensor and the second speed sensor, respectively. The electronic controller is used to receive a first speed signal fed back by the first speed sensor and a second speed signal fed back by the second speed sensor.

[0061] In some preferred embodiments, the power turbine overspeed protection method further includes:

[0062] The electronic controller receives a first speed signal and a second speed signal, and processes the first speed signal and the second speed signal respectively; the electronic controller performs signal processing according to a preset program and method to eliminate signal deviation caused by measurement error; when the electronic controller detects that the speed signal reaches a threshold, it controls the engine system to perform over-speed protection.

[0063] In some preferred embodiments, the power turbine overspeed protection method further includes:

[0064] The preset limits are calculated and determined based on the state parameters of the current engine model during the over-revving test when the shaft breaks.

[0065] Specifically, different engine models retain relevant state parameters under conditions such as over-speed and shaft breakage in previous tests. Based on the state parameters, further calculation and analysis are performed to determine preset limits, and preset fault values ​​can be set accordingly to reduce the risk of shaft breakage in engine tests after applying this method.

[0066] On the other hand, a preferred embodiment of the present invention also provides an overspeed protection device for an aero-engine power turbine, comprising:

[0067] The detection and acquisition module is used to detect the speed of the propeller shaft of the reducer unit and feed back the first speed signal, and to detect the speed of the rear end of the power turbine shaft and feed back the second speed signal.

[0068] The judgment and control module is used to output judgment results based on the first speed signal and the second speed signal fed back by the detection and acquisition module, and to control the aero-engine according to the judgment results: when the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft exceeds the preset limit or the speed of the aero-engine reaches the over-speed condition, the power turbine rotor is protected against over-speed and the fuel supply is cut off.

[0069] Each module in the aforementioned power turbine overspeed protection device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the computer device's memory as software, so that the processor can call and execute the corresponding operations of each module.

[0070] On the other hand, a preferred embodiment of the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the steps of the above-described power turbine overspeed protection method when executing the computer program.

[0071] On the other hand, a preferred embodiment of the present invention also provides a storage medium, the storage medium including a stored program, which, when the program is running, controls the device where the storage medium is located to perform the steps of the power turbine overspeed protection method described above.

[0072] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be executed in a different order than that shown here. If the functions described in this embodiment are implemented as software functional units and sold or used as independent products, they can be stored in one or more computing device-readable storage media. Based on this understanding, the parts of this application's embodiments that contribute to the prior art or the technical solutions can be embodied in the form of a software product stored in a storage medium, including several instructions to cause a computing device (which may be a personal computer, server, mobile computing device, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage media include: USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, optical disks, and various other media capable of storing program code.

[0073] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0074] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for overspeed protection of a power turbine, characterized in that, include: S1. Detect the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft through the control system; S2. Determine whether the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft exceeds a preset limit through the control system. If yes, proceed to step S4; otherwise, proceed to step S31; S31. Determine whether the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft is greater than a preset fault value through the control system. If yes, record 'risk of shaft breakage exists' and proceed to step S311; otherwise, proceed to step S32; S311. Determine whether the speed of the reducer unit propeller shaft exceeds a first preset threshold and whether the speed of the rear end of the power turbine shaft exceeds a second preset threshold through the control system. If the speed of the reducer unit propeller shaft exceeds the first preset threshold or the speed of the rear end of the power turbine shaft exceeds the second preset threshold, proceed to step S4; if the speed of the reducer unit propeller shaft does not exceed the first preset threshold and the speed of the rear end of the power turbine shaft does not exceed the second preset threshold, proceed to step S312; S312. The control system determines whether the difference between the speed of the reducer unit propeller shaft and the speed of the rear end of the power turbine shaft exceeds a preset fault value and is less than or equal to a preset limit for a continuous period. If the continuous period reaches the preset period, a fault alarm is triggered and the fuel flow is limited; if the continuous period is less than the preset period, proceed to step S1; S32. The control system determines whether the speed of the reducer unit propeller shaft exceeds a first preset threshold and whether the speed of the rear end of the power turbine shaft exceeds a second preset threshold. If the speed of the reducer unit propeller shaft exceeds the first preset threshold or the speed of the rear end of the power turbine shaft exceeds the second preset threshold, proceed to step S4; if the speed of the reducer unit propeller shaft does not exceed the first preset threshold and the speed of the rear end of the power turbine shaft does not exceed the second preset threshold, proceed to step S1; S4. Over-rotation protection is applied to the power turbine rotor and the fuel supply is cut off.

2. The overspeed protection method for a power turbine according to claim 1, characterized in that, The power turbine overspeed protection method further includes: setting the first preset threshold and the second preset threshold to the same value.

3. The overspeed protection method for a power turbine according to claim 1, characterized in that, The control system includes a first speed sensor and a second speed sensor respectively disposed on the rear end of the propeller shaft of the reducer unit and the power turbine shaft, and an electronic controller electrically connected to the first speed sensor and the second speed sensor respectively. The electronic controller is used to receive a first speed signal fed back by the first speed sensor and a second speed signal fed back by the second speed sensor.

4. The overspeed protection method for a power turbine according to claim 3, characterized in that, The power turbine overspeed protection method further includes: receiving a first speed signal and a second speed signal through an electronic controller, and performing signal processing on the first speed signal and the second speed signal respectively.

5. The overspeed protection method for a power turbine according to claim 1, characterized in that, The power turbine over-speed protection method further includes: the preset limit is calculated and determined based on the state parameters when the shaft breaks during the over-speed test of the current model engine.

6. An overspeed protection device for an aero-engine power turbine, characterized in that, The overspeed protection device for the power turbine of an aero-engine, applicable to any one of claims 1-5, comprises: a detection and acquisition module for detecting the rotational speed of the propeller shaft of the reducer unit and feeding back a first rotational speed signal, and detecting the rotational speed of the rear end of the power turbine shaft and feeding back a second rotational speed signal; and a judgment and control module for outputting a judgment result based on the first and second rotational speed signals fed back by the detection and acquisition module, and controlling the aero-engine according to the judgment result: when the difference between the rotational speed of the propeller shaft of the reducer unit and the rotational speed of the rear end of the power turbine shaft exceeds a preset limit or the rotational speed of the aero-engine reaches the overspeed condition, overspeed protection is provided for the power turbine rotor and the fuel supply is cut off.

7. An electronic device, characterized in that, The invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor executes the computer program to implement the steps of the power turbine overspeed protection method as described in any one of claims 1 to 5.

8. A storage medium comprising a stored program, characterized in that, When the program is running, it controls the device where the storage medium is located to perform the steps of the power turbine overspeed protection method as described in any one of claims 1 to 5.

Images