Dynamic load calibration device and method for an aircraft tire dynamic simulation test machine

Abstract

The application provides a kind of aviation tire dynamic simulation test machine dynamic load calibration device and method, it is related to aviation tire test equipment field, including: fixed frame, it is arranged between the flywheel and loading frame of test machine, and is fixed on the base of test machine;Mobile frame, it is arranged on fixed frame, and can be moved and locked along the loading direction of test machine;Loading plate, it is installed on mobile frame, for the load of aviation tire;Calibration load sensor, for measuring real-time load value in calibration process;Arc tooling, it is installed on fixed frame, and arc tooling is adapted and installed on the arc contact surface of flywheel, arc tooling is connected with one end of calibration load sensor;The other end of calibration load sensor is connected with loading plate.The application realizes load calibration on test machine, and the device can be used for calibrating the dynamic load of tire in particular, so that it can simulate the real working condition of tire, and improve the measurement accuracy of load of aviation tire dynamic simulation test machine.

Description

Technical Field

[0001] This invention relates to the field of aircraft tire testing equipment, and more specifically to a dynamic load calibration device and method for an aircraft tire dynamic simulation testing machine. Background Technology

[0002] An aircraft tire dynamic simulation testing machine is a specialized device used to simulate various dynamic operating conditions of aircraft tires during actual flight to test their performance and durability. Tire load is a crucial parameter of the aircraft tire dynamic simulation testing machine, and its accuracy directly affects the accuracy of the test results. Due to factors such as the self-weight of the loading frame and friction, there is an error between the load measured by the aircraft tire dynamic simulation testing machine and the actual load. Therefore, it is necessary to design an aircraft tire dynamic simulation testing machine to ensure load testing accuracy and improve the overall test accuracy.

[0003] The aircraft tire dynamic simulation testing machine mainly consists of a flywheel and a loading frame. The load is measured by a measuring sensor, which is generally installed behind the loading frame. The conventional load calibration method is to remove the aircraft tire, install the calibration load sensor between the tire mounting shaft and the flywheel, and compare the values ​​of the calibration load sensor with those of the measuring sensor to perform load calibration.

[0004] There are two existing conventional load calibration methods for dynamic simulation testing machines for aircraft tires. The first method involves installing a column between the flywheel and the loading frame, with the calibration sensor installed between the column and the tire mounting shaft. The disadvantages of this method are: 1) It requires a large installation space between the flywheel and the loading frame to accommodate the column, and the column must have sufficient strength and rigidity; 2) It places high demands on the installation of the column and calibration sensor, requiring the loading positions of the column, calibration load sensor, and tire mounting shaft to be at the same horizontal level and concentric; 3) The calibration load sensor should be connected to the column and tire mounting shaft via ball joints to avoid introducing installation errors into the calibration process. The second method, when space is limited, involves installing the load sensor between the flywheel and the tire mounting shaft. The disadvantages of this method are: 1) The flywheel surface is curved, making it impossible for the load sensor to be directly loaded; 2) The flywheel is prone to rotation during calibration, potentially causing accidents; 3) It has high installation requirements. In addition, the calibration process cannot simulate the stiffness of the aircraft tires because the tires are removed, resulting in poor accuracy of the takeoff simulation. Although some researchers use hydraulic oil for stiffness simulation, the stiffness cannot be adjusted by this method, and the air content in the hydraulic oil also affects the stability of the stiffness simulation. Summary of the Invention

[0005] In view of this, embodiments of this application provide a dynamic load calibration device and method for an aircraft tire dynamic simulation testing machine, so as to achieve load calibration using a tire and calibration device in the aircraft tire dynamic simulation testing machine. The calibration device can be used in particular to calibrate the dynamic load of the tire so that it can simulate the real working conditions of the tire and improve the measurement accuracy of the load of the aircraft tire dynamic simulation testing machine.

[0006] This application provides the following technical solution: a dynamic load calibration device for an aircraft tire dynamic simulation testing machine, comprising:

[0007] A dynamic simulation testing machine, comprising a flywheel and a loading frame for mounting and loading aircraft tires. A fixed frame is disposed between the flywheel and the loading frame of the dynamic simulation testing machine and fixed to the base of the dynamic simulation testing machine. A movable frame is slidably disposed on the fixed frame, enabling the movable frame to move and lock along the loading direction of the dynamic simulation testing machine on the fixed frame; A loading plate, which is mounted on the movable frame, is used to bear the load of the aircraft tires on the dynamic simulation test machine; A calibration load sensor is used to measure the real-time load value during the calibration process; the two ends of the calibration load sensor are respectively connected to a first connector and a second connector. An arc-shaped fixture is mounted on the fixed frame and adapted to and installed on the arc-shaped contact surface of the flywheel. The arc-shaped fixture is connected to one end of the calibration load sensor through the first connector; the other end of the calibration load sensor is connected to the loading plate through the second connector. The force transmission path of the calibration device is formed from the flywheel through the arc-shaped tooling, the first connector, the calibration load sensor, the second connector, the loading plate to the aircraft tire, so as to perform load calibration when the aircraft tire is installed in the dynamic simulation test machine.

[0008] According to one embodiment of the present invention, a first connecting rod and a second connecting rod are symmetrically arranged on both sides of the arc-shaped tooling. The first connecting rod and the second connecting rod are connected to the fixed frame through an adjustable first lifting ring assembly, so that the axes of the arc-shaped tooling, the first connecting member, the calibration load sensor and the second connecting member can be aligned by adjusting the first lifting ring assembly.

[0009] According to one embodiment of the present invention, a third connecting rod and a fourth connecting rod are symmetrically arranged on both sides of the loading plate. The third connecting rod and the fourth connecting rod are connected to the movable frame through an adjustable second lifting ring assembly, so that the force center of the loading plate is aligned with the axis of the second connecting member by adjusting the second lifting ring assembly.

[0010] According to one embodiment of the present invention, a slider is provided at the bottom of the movable frame, and a slide rail is provided on the fixed frame to cooperate with the slider, so that the movable frame can slide along the loading direction through the cooperation of the slider and the slide rail.

[0011] According to one embodiment of the present invention, a locking mechanism is provided on the movable frame for locking the relative position of the movable frame and the fixed frame after the movable frame is adjusted into place, so as to fix the calibration load sensor and the connecting component assembly.

[0012] According to one embodiment of the present invention, the first connector and the second connector are respectively ball joints.

[0013] The present invention also provides a calibration method using the dynamic load calibration device of the aircraft tire dynamic simulation testing machine as described above, comprising the following steps: S1. Install the calibration device: Install the fixed frame between the flywheel and the loading frame of the dynamic simulation test machine; install the arc-shaped fixture onto the surface of the flywheel; install the loading plate onto the moving frame and move the moving frame away from the flywheel; connect the calibration load sensor to the arc-shaped fixture through the first ball joint and to the loading plate through the second ball joint; adjust and lock the position of the moving frame; S2. Install the aircraft tire: Install the aircraft tire to be tested onto the tire mounting shaft of the dynamic simulation test machine; S3. Perform load calibration: Drive the loading frame of the dynamic simulation test machine to load the aircraft tire onto the loading plate of the calibration device; S4. Data Acquisition and Comparison: Acquire the calibration load value measured by the calibration load sensor, and simultaneously acquire the load value measured by the measurement sensor installed on the dynamic simulation test machine itself; S5. Establish conversion relationship: Based on the multiple sets of load values ​​synchronously collected in step S4, establish the conversion relationship between the calibration load value and the measurement sensor load value to complete the calibration of the test machine load measurement system.

[0014] According to one embodiment of the present invention, in step S1, by adjusting the lifting ring assembly connecting the arc-shaped tooling and the fixed frame, and by adjusting the lifting ring assembly connecting the loading plate and the moving frame, the axes of the ball joints at both ends of the calibration load sensor are aligned.

[0015] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least: (1) This device uses aircraft tires for direct loading, and the measured load can especially simulate the load rate of the dynamic load of the tire, thus improving the measurement accuracy of the load of the aircraft tire dynamic simulation test machine. (2) This device uses a connecting rod and lifting ring method to ensure the concentricity of the calibration sensor and tooling, which ensures the installation accuracy, effectively reduces the cost of the device and reduces the installation difficulty; (3) This device uses a movable frame to install and fix the calibration sensor and tooling, so that they will not fall due to gravity. The installation is convenient and provides convenient conditions for the later replacement of the sensor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the first structure of the dynamic load calibration device for the aircraft tire dynamic simulation test machine according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the second structure of the dynamic load calibration device for the aircraft tire dynamic simulation test machine according to an embodiment of the present invention; Among them, 1-flywheel, 2-fixed frame, 3-arc tooling, 4-first ball joint, 5-moving frame, 6-calibration load sensor, 7-second ball joint, 8-loading plate, 9-aircraft tire, 10-loading frame. Detailed Implementation

[0018] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0019] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] This invention provides a dynamic load calibration device for an aircraft tire dynamic simulation testing machine, comprising: A dynamic simulation testing machine, comprising a flywheel and a loading frame for mounting and loading aircraft tires. A fixed frame is disposed between the flywheel and the loading frame of the dynamic simulation testing machine and fixed to the base of the dynamic simulation testing machine. A movable frame is slidably disposed on the fixed frame, enabling the movable frame to move and lock along the loading direction of the dynamic simulation testing machine on the fixed frame; A loading plate, which is mounted on the movable frame, is used to bear the load of the aircraft tires on the dynamic simulation test machine; A calibration load sensor is used to measure the real-time load value during the calibration process; the two ends of the calibration load sensor are respectively connected to a first connector and a second connector. An arc-shaped fixture is mounted on the fixed frame and adapted to and installed on the arc-shaped contact surface of the flywheel. The arc-shaped fixture is connected to one end of the calibration load sensor through the first connector; the other end of the calibration load sensor is connected to the loading plate through the second connector. The force transmission path of the calibration device is formed from the flywheel through the arc-shaped tooling, the first connector, the calibration load sensor, the second connector, the loading plate to the aircraft tire, so as to perform load calibration when the aircraft tire is installed in the dynamic simulation test machine.

[0021] To ensure the concentricity of the calibration sensor and tooling in the calibration device, in one embodiment of the present invention, a first connecting rod and a second connecting rod are symmetrically arranged on both sides of the arc-shaped tooling. The first and second connecting rods are connected to the fixed frame via an adjustable first lifting ring assembly, so that the axes of the arc-shaped tooling, the first connecting member, the calibration load sensor, and the second connecting member are aligned by adjusting the first lifting ring assembly. A third connecting rod and a fourth connecting rod are symmetrically arranged on both sides of the loading plate. The third and fourth connecting rods are connected to the movable frame via an adjustable second lifting ring assembly, so that the force center of the loading plate is aligned with the axis of the second connecting member by adjusting the second lifting ring assembly. This embodiment of the present invention uses a connecting rod and lifting ring method to ensure the concentricity of the calibration sensor and tooling, thereby ensuring calibration accuracy.

[0022] In one embodiment of the present invention, a slider is provided at the bottom of the movable frame, and a slide rail is provided on the fixed frame to cooperate with the slider, so that the movable frame can slide along the loading direction through the cooperation of the slider and the slide rail. A locking mechanism is provided on the movable frame to lock the relative position of the movable frame and the fixed frame after the movable frame is adjusted to the correct position, so as to fix the calibration load sensor and the connecting component assembly.

[0023] In one embodiment of the present invention, the first connector and the second connector are respectively ball joints.

[0024] like Figures 1-2 As shown, in a specific implementation, the dynamic load calibration device for the aircraft tire dynamic simulation testing machine of this embodiment of the invention consists of a fixed frame 2, an arc-shaped fixture 3, a first ball joint 4, a moving frame 5, a calibration load sensor 6, a second ball joint 7, a loading plate 8, and an aircraft tire 9. The fixed frame 2 is installed between the flywheel 1 and the loading frame 10. The fixed frame 2 is used to install the arc-shaped fixture 3 and the moving frame 5. The arc-shaped fixture 3 is used to change the arc surface of the flywheel into a ball-and-socket surface suitable for the installation of the first ball joint 4. A slider is installed at the bottom of the moving frame 5, and a slide rail is installed on the fixed frame 2, allowing the moving frame 5 to move back and forth along the loading direction of the aircraft tire dynamic simulation testing machine. The first ball joint 4 is used to connect the arc-shaped fixture 3 and the calibration load sensor 6. The calibration load sensor 6 is used to measure the test load of the wheel using a standard load sensor. The second ball joint 7 is used to connect the calibration load sensor 6 and the loading plate 8. The loading plate 8 is installed on the moving frame 5 and is used to connect the second ball joint 7 and bear the load of the aircraft tire 9.

[0025] like Figure 2 As shown, this embodiment also includes: 1) Two connecting rods are installed on both sides of the arc-shaped fixture 3. The connecting rods pass through two lifting rings and are fixed to the fixed frame 2. When installing the arc-shaped fixture 3, the lifting ring screws on the fixed frame 2 can be adjusted to achieve concentricity of the arc-shaped fixture 3, the first ball joint 4, the calibration load sensor 6, and the second ball joint 7. Similarly, two connecting rods are installed on both sides of the loading plate 8. The connecting rods pass through two lifting rings and are fixed to the movable frame 5 to ensure that the loading position of the loading plate 8 is concentric with the second ball joint 7. 2) By locking the position of the movable frame 5, the first ball joint 4, the calibration load sensor 6, and the second ball joint 7 are fixedly installed to prevent them from falling due to gravity. 3) The load of the tire is transferred to the ball joint fixture of the calibration load sensor through the loading plate. During the calibration process, the aircraft tire is directly used for loading, which is consistent with the actual situation.

[0026] The installation sequence of the dynamic load calibration device for the aircraft tire dynamic simulation test machine in this embodiment of the invention is as follows: 1) Install the fixed frame 2 and the movable frame 5; 2) Install the fixed frame 2, fix it on the base of the aircraft tire dynamic simulation test machine, and place it between the flywheel 1 and the loading frame 10; 3) Install the arc-shaped fixture 3 and the first ball joint 4; 4) Install the loading plate 8 to the movable frame 5, and move the position of the loading plate 8 away from the flywheel 1; 5) Install the calibration load sensor 6 and the second ball joint 7; 6) Move the movable frame 5, connect the loading plate 8 to the second ball joint 7, and lock the position of the movable frame 5; 7) Install the aircraft tire 9.

[0027] The calibration method of the dynamic load calibration device for the aircraft tire dynamic simulation testing machine according to an embodiment of the present invention includes the following steps: S1. Install the calibration device: Install the fixed frame between the flywheel and the loading frame of the dynamic simulation test machine; install the arc-shaped fixture onto the surface of the flywheel; install the loading plate onto the moving frame and move the moving frame away from the flywheel; connect the calibration load sensor to the arc-shaped fixture through the first ball joint and to the loading plate through the second ball joint; adjust and lock the position of the moving frame; S2. Install the aircraft tire: Install the aircraft tire to be tested onto the tire mounting shaft of the dynamic simulation test machine; S3. Perform load calibration: Drive the loading frame of the dynamic simulation test machine to load the aircraft tire onto the loading plate of the calibration device; S4. Data Acquisition and Comparison: Acquire the calibration load value measured by the calibration load sensor, and simultaneously acquire the load value measured by the measurement sensor installed on the dynamic simulation test machine itself; S5. Establish conversion relationship: Based on the multiple sets of load values ​​synchronously collected in step S4, establish the conversion relationship between the calibration load value and the measurement sensor load value, so that their values ​​are infinitely close, and complete the calibration of the test machine load measurement system.

[0028] The dynamic load calibration device for an aircraft tire dynamic simulation testing machine according to an embodiment of the present invention includes a fixed frame, an arc-shaped fixture, a first ball joint, a movable frame, a calibration load sensor, a second ball joint, and a loading plate. The fixed frame is installed between the flywheel and the loading frame. The arc-shaped fixture is adapted to the curved surface of the flywheel. The movable frame is movable along the loading direction. The calibration load sensor is connected to the arc-shaped fixture and the loading plate respectively through ball joints. During calibration, the aircraft tire is directly loaded onto the loading plate, and dynamic load calibration is achieved by comparing the values ​​of the calibration load sensor and the measurement sensor of the testing machine. The present invention can perform calibration without removing the tire, realistically simulating the stiffness and dynamic load characteristics of the tire, improving the accuracy of load measurement and the reliability of the test.

[0029] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A dynamic load calibration device for an aircraft tire dynamic simulation testing machine, characterized in that, include: A dynamic simulation testing machine, comprising a flywheel and a loading frame for mounting and loading aircraft tires. A fixed frame is disposed between the flywheel and the loading frame of the dynamic simulation testing machine and fixed to the base of the dynamic simulation testing machine. A movable frame is slidably disposed on the fixed frame, enabling the movable frame to move and lock along the loading direction of the dynamic simulation testing machine on the fixed frame; A loading plate, which is mounted on the movable frame, is used to bear the load of the aircraft tires on the dynamic simulation test machine; A calibration load sensor is used to measure the real-time load value during the calibration process; The two ends of the calibration load sensor are respectively connected to the first connector and the second connector; An arc-shaped fixture is mounted on the fixed frame and adapted to and installed on the arc-shaped contact surface of the flywheel. The arc-shaped fixture is connected to one end of the calibration load sensor through the first connector; the other end of the calibration load sensor is connected to the loading plate through the second connector. The force transmission path of the calibration device is formed from the flywheel through the arc-shaped tooling, the first connector, the calibration load sensor, the second connector, the loading plate to the aircraft tire, so as to perform load calibration when the aircraft tire is installed in the dynamic simulation test machine.

2. The dynamic load calibration device for the aircraft tire dynamic simulation testing machine according to claim 1, characterized in that, The arc-shaped tooling has a first connecting rod and a second connecting rod symmetrically arranged on both sides. The first connecting rod and the second connecting rod are connected to the fixed frame through an adjustable first lifting ring assembly, so that the axes of the arc-shaped tooling, the first connecting member, the calibration load sensor and the second connecting member can be aligned by adjusting the first lifting ring assembly.

3. The dynamic load calibration device for the aircraft tire dynamic simulation testing machine according to claim 1, characterized in that, The loading plate is symmetrically provided with a third connecting rod and a fourth connecting rod on both sides. The third connecting rod and the fourth connecting rod are connected to the movable frame through an adjustable second lifting ring assembly, so that the force center of the loading plate is aligned with the axis of the second connecting member by adjusting the second lifting ring assembly.

4. The dynamic load calibration device for the aircraft tire dynamic simulation testing machine according to claim 1, characterized in that, The bottom of the movable frame is provided with a slider, and the fixed frame is provided with a slide rail that cooperates with the slider, so that the movable frame can slide along the loading direction through the cooperation of the slider and the slide rail.

5. The dynamic load calibration device for the aircraft tire dynamic simulation testing machine according to claim 1, characterized in that, A locking mechanism is provided on the movable frame to lock the relative position of the movable frame and the fixed frame after the movable frame is adjusted into place, so as to fix the calibration load sensor and the connecting component assembly.

6. The dynamic load calibration device for the aircraft tire dynamic simulation testing machine according to claim 1, characterized in that, The first connector and the second connector are both ball joints.

7. A calibration method using the dynamic load calibration device of an aircraft tire dynamic simulation testing machine as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Install the calibration device: Install the fixed frame between the flywheel and the loading frame of the dynamic simulation testing machine; install the arc-shaped fixture onto the surface of the flywheel; install the loading plate onto the moving frame and move the moving frame to a position away from the flywheel; The calibration load sensor is connected to the arc-shaped tooling via a first ball joint and to the loading plate via a second ball joint. Adjust and lock the position of the moving frame; S2. Install the aircraft tire: Install the aircraft tire to be tested onto the tire mounting shaft of the dynamic simulation test machine; S3. Perform load calibration: Drive the loading frame of the dynamic simulation test machine to load the aircraft tire onto the loading plate of the calibration device; S4. Data Acquisition and Comparison: Acquire the calibration load value measured by the calibration load sensor, and simultaneously acquire the load value measured by the measurement sensor installed on the dynamic simulation test machine itself; S5. Establish conversion relationship: Based on the multiple sets of load values ​​synchronously collected in step S4, establish the conversion relationship between the calibration load value and the measurement sensor load value to complete the calibration of the test machine load measurement system.

8. The calibration method according to claim 7, characterized in that, In step S1, by adjusting the lifting ring assembly connecting the arc-shaped tooling and the fixed frame, and by adjusting the lifting ring assembly connecting the loading plate and the moving frame, the axes of the ball joints at both ends of the calibration load sensor are aligned.

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