Instantaneous large-torque loading device in rotating state
By designing a rotating state instantaneous high torque loading device, using the combination of drive motor, coupling, load device and clutch, the problem of ineffective control of instantaneous torque of aero engine rotor failure in the prior art is solved, and precise torque control and real working conditions are achieved.
Patent Information
- Application Number
- CN202421458963.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-24
AI Technical Summary
In the prior art, when the rotor of the aircraft engine fails, the motor drive method cannot effectively control the instantaneous large torque, resulting in the inability to accurately simulate the real engine operating conditions.
A rotating state instantaneous large torque loading device is designed, including a drive motor, coupling, load device and clutch. The torque is monitored in real time through the torsion gauge on the coupling. The load device consumes mechanical energy, and the clutch is instantly disconnected, and the torque received by the rotor is accurately controlled.
It realizes that the rotor can only bear the large torque provided by the drive end at a high speed when it is running at a moment, and the torque can be adjusted, simulating the real engine low-pressure failure condition, and meeting the research needs of engine rotor failure analysis.
Smart Images
Figure CN222866225U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aviation engine testing, in particular to an instantaneous large torque loading device in a rotating state. Background Art
[0002] The study of rotor failure is a very important research direction in the field of aircraft engines. According to the provisions of Article 33.27 (c)(2)(vi) of the Airworthiness Clause, it is required to determine the maximum speed caused by the failure of any component or system in the typical installation of the engine and any failure of a component or system that is not generally detected during routine pre-flight inspections or normal flight use. When studying the failure of the engine shaft, it is necessary to provide a large torque to the rotor at the moment of failure, thereby simulating the actual working conditions of the engine to determine the maximum speed of the rotor.
[0003] The method of applying instantaneous large torque to the rotor is particularly important for the failure analysis of aircraft engines. At present, the research and experiments on the failure of aircraft engine rotors carried out in China usually use motors as the driving method. However, when the rotor speed is stable, the motor usually works at constant power and has a small torque, which makes it impossible to control the torque at the moment of rotor failure.
[0004] In view of this, the inventor of the present application has designed a rotating state instantaneous large torque loading device in order to overcome the above technical problems. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the defect that in the prior art, the research and test on the failure of the aircraft engine rotor usually uses an electric motor as the driving mode. However, when the rotor speed is stable, the motor generally works at a constant power and has a small torque, and the magnitude of the torque at the moment of rotor failure cannot be controlled. A device for loading instantaneous large torque in a rotating state is provided.
[0006] The utility model solves the above technical problems through the following technical solutions:
[0007] The utility model provides a rotating state instantaneous large torque loading device, which is characterized in that it is used to provide an instantaneous large torque to a tested rotor when the tested rotor is running, and the instantaneous large torque loading device comprises: a driving motor, the driving motor is used to provide mechanical energy; a coupling, the first end of the coupling is connected to the output shaft of the driving motor, the second end of the coupling is connected to the first end of the tested rotor, and a torque meter is arranged on the coupling; a load device, the load device is used to consume the mechanical energy of the driving motor; a clutch, the first end of the clutch is connected to the second end of the tested rotor, and the second end of the clutch is connected to the load device.
[0008] According to an embodiment of the present invention, the driving motor is a variable frequency motor.
[0009] According to an embodiment of the utility model, the drive motor has a rotation speed protection mechanism.
[0010] According to an embodiment of the present utility model, the second end of the coupling is connected to the first end of the tested rotor via a plurality of roller bearings.
[0011] According to an embodiment of the utility model, the roller bearing is arranged at the second end of the coupling, and a plurality of the roller bearings are circumferentially distributed around the central axis of the coupling.
[0012] According to an embodiment of the present invention, the load device is a hydraulic dynamometer.
[0013] According to an embodiment of the present invention, the clutch is electrically connected or communicatively connected to a controller, and the controller is used for remotely controlling the clutch to be disengaged or engaged.
[0014] The positive and progressive effects of the utility model are:
[0015] The instantaneous large torque loading device in the rotating state of the utility model has at least the following advantages:
[0016] The instantaneous large torque loading device in the rotating state of the utility model can make the rotor only bear the large torque provided by the driving end when the rotor is running at high speed, and the torque size is adjustable. The instantaneous large torque loading device in the rotating state of the utility model has a simple structure. The rotor is driven by a motor and can be realized by simply modifying the end of the rotor away from the driving end. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:
[0018] Figure 1 It is a structural schematic diagram of the instantaneous large torque loading device in a rotating state of the utility model.
[0019] Figure 2 It is a cross-sectional schematic diagram of the connection between the coupling and the tested rotor in the instantaneous large torque loading device in the rotating state of the utility model.
[0020] [Reference Signs]
[0021] Drive motor 100
[0022] Output shaft 110
[0023] Coupling 200
[0024] The first end 210 of the coupling
[0025] The second end 220 of the coupling
[0026] Roller bearing 230
[0027] Central Axis 240
[0028] Loading device 300
[0029] Clutch 400
[0030] The first end 410 of the clutch
[0031] The second end 420 of the clutch
[0032] Test rotor 500
[0033] The first end of the tested rotor is 510
[0034] The second end of the tested rotor is 520 DETAILED DESCRIPTION
[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.
[0036] Embodiments of the utility model will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the utility model, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used in all drawings to represent the same or similar parts. In addition, although the terms used in the utility model are selected from well-known and commonly used terms, some of the terms mentioned in the utility model specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description herein. In addition, it is required to understand the utility model not only by the actual terms used, but also by the meaning implied by each term.
[0037] like Figure 1 As shown, the utility model provides a rotating state instantaneous large torque loading device, which is used to provide an instantaneous large torque to the tested rotor 500 when it is running. The instantaneous large torque loading device includes:
[0038] A driving motor 100, the driving motor 100 is used to provide mechanical energy;
[0039] A coupling 200, wherein a first end 210 of the coupling is connected to the output shaft 110 of the driving motor 100, a second end 220 of the coupling is connected to the first end 510 of the rotor to be tested, and a torque meter is provided on the coupling 200;
[0040] A load device 300 , the load device 300 is used to consume the mechanical energy of the drive motor 100 ;
[0041] The clutch 400 , the first end 410 of the clutch is connected to the second end 520 of the tested rotor, and the second end 420 of the clutch is connected to the load device 300 .
[0042] The coupling 200 is used to connect the drive motor 100 and the rotor, and is equipped with a torque meter to monitor the actual torque borne by the rotor in real time.
[0043] The load device 300 is used to consume part of the mechanical energy of the drive motor 100 under the constant torque and constant speed working state. Its structure and working principle are not limited, and it can be a hydraulic dynamometer, a motor, etc.
[0044] The clutch 400 is used to connect the rotor and the load device 300, so that the connection between the two can be instantly disconnected according to the situation.
[0045] The instantaneous large torque loading device in the rotating state of the utility model has a load device 300 installed at the end of the rotor away from the drive, which can ensure that the drive motor 100 works with a constant large torque when the rotor speed is stable; there is a torque meter on the coupling 200 of the rotor close to the drive end, which can monitor the actual torque size of the rotor in real time, and by adjusting the power of the load device 300, the torque size of the rotor under the test condition can be accurately controlled; there is a clutch 400 between the load device 300 and the rotor, which can disconnect the connection between the two when the rotor reaches the target speed, so that the rotor instantly only bears the large torque provided by the drive end, thereby simulating the real engine low-pressure shaft failure condition.
[0046] As a preferred embodiment of the instantaneous large torque loading device in the rotating state of the utility model, the driving motor 100 is a variable frequency motor.
[0047] The driving motor 100 adopts a variable frequency motor and can work at a constant torque depending on the load condition.
[0048] As a preferred embodiment of the instantaneous large torque loading device in the rotating state of the utility model, the drive motor 100 has a rotation speed protection mechanism.
[0049] The speed protection mechanism can monitor the speed of the test rotor in real time to avoid over-rotation caused by unexpected factors during the test. When the test rotor over-rotates, the drive motor 100 is automatically powered off and inertially decelerates to avoid damage to the drive motor 100 and the test rotor.
[0050] like Figure 2 As shown, as a preferred embodiment of the instantaneous large torque loading device in the rotating state of the utility model, the second end 220 of the coupling is connected to the first end 510 of the tested rotor through a plurality of roller bearings 230 .
[0051] like Figure 2 As shown, as a preferred embodiment of the instantaneous large torque loading device in the rotating state of the utility model, the roller bearing 230 is arranged at the second end 220 of the coupling, and a plurality of roller bearings 230 are circumferentially distributed around the central axis 240 of the coupling 200 .
[0052] To simulate the engine low-pressure shaft fracture condition, when the clutch 400 is disconnected and the load on the load device 300 end is lost, the test rotor will undergo a large axial displacement toward one end of the load device 300. If the coupling 200 has no axial displacement capability, the coupling 200 will generate a large axial force, causing damage or even fracture of the coupling 200. Therefore, in the instantaneous large torque loading device in the rotating state of the utility model, the coupling 200 and the test rotor 500 are connected through a roller bearing structure.
[0053] The roller bearing 230 can bear a large radial load, so it can meet the test conditions of large torque. The roller bearing 230 is a rolling friction type, and the friction force is small when it bears large torque, so the axial large displacement is less hindered.
[0054] Therefore, the connection between the coupling 200 and the test rotor 500 allows a large axial displacement to be generated under a large torque state, thereby reducing the axial force generated by the axial displacement of the test rotor 500.
[0055] As a preferred embodiment of the instantaneous large torque loading device in the rotating state of the utility model, the loading device 300 is a hydraulic dynamometer.
[0056] The hydraulic dynamometer uses hydraulic pressure as the medium to test force. The test process is highly accurate and the test results are accurate and reliable.
[0057] As a preferred embodiment of the instantaneous large torque loading device in a rotating state of the present invention, the clutch 400 is electrically connected or communicatively connected to a controller, and the controller is used to remotely control the clutch 400 to be separated or engaged.
[0058] The controller electrically or communicatively connected to the clutch 400 can instantly disconnect the connection between the rotor and the load device 300 through remote control.
[0059] As described below, a specific embodiment of the instantaneous large torque loading device in the rotating state of the utility model is used, wherein the loading device 300 adopts a hydraulic dynamometer:
[0060] The power of the drive motor 100 is P(e), the power consumed by the rotor rotating at a constant speed is P(m), and the power of the hydraulic dynamometer is P(w). The relationship between them is as follows (the units of P(e), P(m), and P(w) are all kW):
[0061] P(e)=P(m)+P(w)
[0062] P(e)=T×N / 9550
[0063] P(w)=Q×(T2-T1) / 14.33
[0064] Among them, T is the torque meter reading on the coupling 200, in Nm; N is the rotor speed, in rpm; Q is the circulating water flow rate of the hydraulic dynamometer, in L / min; T1 is the water inlet temperature of the hydraulic dynamometer, in °C; T2 is the return water temperature of the hydraulic dynamometer, in °C.
[0065] When the test rotor 500 rotates at a constant speed, P(m) is a fixed value. Therefore, the driving motor 100 increases the test rotor 500 to the target speed with a certain torque and then starts constant power operation. At this time, P(e)=P(m).
[0066] After the hydraulic dynamometer starts working, if you want to increase the torque T on the tested rotor 500, that is, increase the power P(e) of the driving motor 100, you only need to increase the circulating water flow Q of the hydraulic dynamometer. At this time, since P(w) is much larger than P(m), when the inlet and return water temperatures are stable, the torque T on the rotor is approximately proportional to the circulating water flow Q of the hydraulic dynamometer. If the flow remains unchanged, the torque will also remain relatively stable.
[0067] After the torque meter reading on the coupling 200 reaches the torque required for the test and stabilizes, the clutch 400 is disconnected. At this time, the load on the rotor away from the driving end disappears instantly, while the drive motor 100 still works at the torque before disconnection for a short time, that is, the tested rotor 500 only bears the large torque provided by the driving end instantly.
[0068] It can be seen that, by simply clarifying the target speed and instantaneous torque of the tested rotor 500 under the test conditions, the rated power of the drive motor 100 and the rated power of the load device 300 can be determined. In addition, during the implementation process, the torque of the tested rotor 500 can be precisely controlled by adjusting the working power of the load device 300 through the indication of the torque meter.
[0069] In summary, the rotating state instantaneous large torque loading device of the utility model can provide the rotor with instantaneous large torque when it is running, and can simulate the actual engine low-pressure shaft failure condition to meet the research requirements for engine rotor failure analysis.
[0070] The instantaneous large torque loading device in the rotating state of the utility model can make the rotor only bear the large torque provided by the driving end when the rotor is running at high speed, and the torque size is adjustable. The instantaneous large torque loading device in the rotating state of the utility model has a simple structure. The rotor is driven by a motor and can be realized by simply modifying the end of the rotor away from the driving end.
[0071] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications fall within the protection scope of the present invention.
Claims
1. A rotating state instantaneous large torque loading device, characterized in that: Used to provide instantaneous large torque to the tested rotor when it is running, the instantaneous large torque loading device includes: A drive motor, the drive motor is used to provide mechanical energy; A coupling, wherein a first end of the coupling is connected to an output shaft of the driving motor, a second end of the coupling is connected to a first end of the tested rotor, and a torque meter is provided on the coupling; A load device, the load device is used to consume the mechanical energy of the drive motor; A clutch, wherein a first end of the clutch is connected to a second end of the tested rotor, and a second end of the clutch is connected to the load device.
2. The rotating state instantaneous large torque loading device according to claim 1, characterized in that: The driving motor is a variable frequency motor.
3. The instantaneous large torque loading device in a rotating state as claimed in claim 1, characterized in that: The drive motor has a rotation speed protection mechanism.
4. The instantaneous large torque loading device in a rotating state as claimed in claim 1, characterized in that: The second end of the coupling is connected to the first end of the tested rotor through a plurality of roller bearings.
5. The instantaneous large torque loading device in a rotating state as claimed in claim 4, characterized in that: The roller bearing is arranged at the second end of the coupling, and a plurality of the roller bearings are circumferentially distributed around the central axis of the coupling.
6. The instantaneous large torque loading device in a rotating state as claimed in claim 1, characterized in that: The load device is a hydraulic dynamometer.
7. The instantaneous large torque loading device in a rotating state as claimed in claim 1, characterized in that: The clutch is electrically or communicatively connected to a controller, and the controller is used to remotely control the clutch to be disengaged or engaged.