Emergency buoy equivalent loading device and method
By designing an emergency float equivalent loading device, using components such as simulated cabin sections, net bags, cable-stayed belts and force sensors, the mechanical environment of the emergency float in the case of emergency landing is simulated, which solves the problem that the intensity of the emergency float cannot be effectively verified in the existing technology, and realizes the real verification of the performance of the emergency float.
Patent Information
- Application Number
- CN202411839262.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-03-18
AI Technical Summary
The prior art is difficult to effectively verify the strength of the emergency float in case of forced landing with water and immersion and drag, and the real performance cannot be verified.
An emergency float equivalent loading device is designed, including a simulated cabin section, an emergency float, a net bag, a cable-stayed belt, a three-coordinate positioning mechanism and a six-component force sensor. Through equivalent loading, the mechanical environment of the emergency float in the case of emergency landing is simulated.
The true performance of the emergency float can be verified through the equivalent loading device, simulated the mechanical environment in the case of emergency landing, and solved the problem that the intensity of the emergency float cannot be effectively verified in the prior art.
Smart Images
Figure CN119643185A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a helicopter emergency buoy, and in particular to an emergency buoy equivalent loading device and method. Background Art
[0002] Helicopters usually use an emergency flotation system to achieve emergency landing and floating. After the emergency flotation system is activated, the emergency float is inflated to provide sufficient buoyancy and stability for the helicopter, allowing the helicopter to float on the water in an upward posture for a certain period of time, allowing the people on board to have enough time for emergency evacuation.
[0003] The strength of the emergency buoy in the case of forced landing, submerged and towing is an important performance of the emergency floating system to achieve stable floating, and needs to be verified. However, the cost of real machine testing is very high, and it is generally not tested on the real machine; in the case of simulated loading test, since the emergency buoy is a flexible airbag with a certain internal pressure, it will not only be subject to water resistance and buoyancy in the case of forced landing, submerged and towing, but also cause changes in internal pressure due to deformation, so it is difficult to directly conduct loading tests. Therefore, the simulation calculation method is usually used to analyze the strength of the emergency buoy in the case of forced landing, submerged and towing, and its true performance cannot be verified. Summary of the invention
[0004] The purpose of the present invention is to provide an emergency buoy equivalent loading device and an emergency buoy equivalent loading method based on the above device, which can simulate the mechanical environment of the emergency buoy in the case of forced landing, immersion and towing through equivalent loading, and verify the actual performance of the emergency buoy.
[0005] The technical solution adopted by the present invention is: An emergency buoy equivalent loading device is used to simulate the mechanical environment of the emergency buoy in the case of forced landing, immersion and towing by equivalent loading, and comprises a simulation section, an emergency buoy, a net bag, a diagonal belt, a three-coordinate positioning mechanism and a six-component force sensor; the simulation section is used to simulate the real installation section of the emergency buoy, and the emergency buoy is installed on the simulation section; the net bag is used to fit and wrap the inflated emergency buoy, a plurality of diagonal belts are connected to the net bag and distributed in the upper area of the inflated emergency buoy, and the diagonal belts are used to diagonally pull the net bag to simulate water resistance and buoyancy load on the inflated emergency buoy; the three-coordinate positioning mechanism can move in three axes and a six-component force sensor is installed at its transmission end, each diagonal belt is connected to the six-component force sensor, and the three-coordinate positioning mechanism is used to adjust the load applied by the diagonal belt to the emergency buoy according to the feedback of the six-component force sensor.
[0006] Preferably, four diagonal belts are used and distributed on the front, back, left and right sides of the upper area of the inflated emergency buoy.
[0007] Preferably, the outer dimensions of the net bag match those of the inflated emergency buoy, and the net bag is formed by sewing warp belts and weft belts, the warp belts are sewn together at both ends and cross-sewn with the weft belts in the middle area.
[0008] Preferably, the three-coordinate positioning mechanism includes an X-axis slide rail installed on a mechanism support frame, a Y-axis slide rail driven by an X-axis servo motor to move along the X-axis slide rail, a sliding seat driven by a Y-axis servo motor to move along the Y-axis slide rail, and a Z-axis rod driven by a Z-axis servo motor to rise and fall along the sliding seat, and a six-component force sensor is installed at the end of the Z-axis rod.
[0009] Preferably, the emergency float is a flexible capsule formed by bonding with polyurethane tape, and the interior of the capsule is filled with air at a certain pressure.
[0010] Preferably, the simulated compartment is mounted on a compartment support frame.
[0011] An emergency buoy equivalent loading method is based on an emergency buoy equivalent loading device: firstly, an uninflated emergency buoy is placed in a net bag, and then the emergency buoy is inflated to a working pressure, so that the net bag completely fits and wraps the inflated emergency buoy, and then each inclined belt is connected to a six-component force sensor; then, the load of the emergency buoy in the case of forced landing, immersion and towing obtained by simulation calculation is taken as the target, and a three-coordinate positioning mechanism adjusts the load applied by the inclined belt to the emergency buoy according to the feedback of the six-component force sensor until the target load is reached, that is, the mechanical environment of the emergency buoy in the case of forced landing, immersion and towing is simulated.
[0012] Preferably, during the adjustment process, the three-coordinate positioning mechanism compares the measured load and the target load in the three axes in real time. If the difference between the two in each axis is within 1% of the target load in the corresponding axis, it is determined that the target load has been reached.
[0013] Preferably, during the inflating process of the emergency float, the position of the net bag is adjusted in time to avoid misalignment of the emergency float and the net bag.
[0014] The beneficial effects of the present invention are: The device uses a diagonal belt and a net bag to apply load to the inflated emergency buoy, uses a three-coordinate positioning mechanism to adjust the applied load, and uses a six-component force sensor to feedback the applied load. Therefore, it can simulate the mechanical environment of the emergency buoy in the event of forced landing, immersion and towing through equivalent loading, and can verify the actual performance of the emergency buoy. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a working schematic diagram of the emergency buoy equivalent loading device.
[0016] Figure 2 It is a flow chart of equivalent loading of emergency buoys.
[0017] In the figure: 1-cabin support frame, 2-simulation cabin, 3-emergency buoy, 4-net bag, 5-mechanism support frame, 6-X-axis slide rail, 7-X-axis servo motor, 8-Z-axis rod, 9-Y-axis slide rail, 10-Y-axis servo motor, 11-Z-axis servo motor, 12-six-component force sensor; 13-cable-stayed belt. DETAILED DESCRIPTION
[0018] The present application is further described below in conjunction with the accompanying drawings and embodiments.
[0019] The present application discloses an emergency buoy equivalent loading device, which is used to simulate the mechanical environment of the emergency buoy in the case of forced landing, immersion and towing through equivalent loading, such as Figure 1 As shown: it includes a simulated cabin section 2, an emergency buoy 3, a net bag 4, a diagonal belt 13, a three-coordinate positioning mechanism and a six-component force sensor 12; the simulated cabin section 2 is used to simulate the actual installation section of the emergency buoy, and the emergency buoy 3 is installed on the simulated cabin section 2; the net bag 4 is used to fit and wrap the inflated emergency buoy 3, a number of diagonal belts 13 are connected to the net bag 4 and distributed in the upper area of the inflated emergency buoy 3, and the diagonal belts 13 are used to diagonally pull the net bag 4 to simulate the water resistance and buoyancy load of the inflated emergency buoy 3; the three-coordinate positioning mechanism can move in three axes and a six-component force sensor 12 is installed at its transmission end, each diagonal belt 13 is connected to the six-component force sensor 12, and the three-coordinate positioning mechanism is used to adjust the load applied by the diagonal belt 13 to the emergency buoy 3 according to the feedback of the six-component force sensor 12.
[0020] like Figure 1 As shown, in this embodiment, four inclined belts 13 are used and distributed on the front, back, left and right sides of the upper area of the inflated emergency buoy 3.
[0021] like Figure 1 As shown, in this embodiment, the outer dimensions of the net bag 4 match the outer dimensions of the inflated emergency float 3, and the net bag 4 is formed by sewing warp belts and weft belts, the warp belts are sewn together at the two end poles and cross-sewn with the weft belts in the middle area.
[0022] like Figure 1 As shown, in this embodiment, the three-coordinate positioning mechanism includes an X-axis slide rail 6 installed on a mechanism support frame 5, a Y-axis slide rail 9 driven by an X-axis servo motor 7 to move along the X-axis slide rail 6, a sliding seat driven by a Y-axis servo motor 10 to move along the Y-axis slide rail 9, and a Z-axis rod 8 driven by a Z-axis servo motor 11 to rise and fall along the sliding seat, and a six-component force sensor 12 is installed at the end of the Z-axis rod 8.
[0023] like Figure 1As shown, in this embodiment, the simulated cabin section 2 is installed on the cabin section support frame 1.
[0024] In this embodiment, the emergency float 3 is a flexible capsule formed by bonding with polyurethane tape, and is filled with air at a certain pressure.
[0025] The working method of the above-mentioned emergency buoy equivalent loading device is: S1) First, place the uninflated emergency buoy 3 in the net bag 4, and then inflate the emergency buoy 3 to the working pressure (e.g., 20 kPa), so that the net bag 4 completely fits and wraps the inflated emergency buoy 3, and then connects each inclined belt 13 to the six-component force sensor 12; during the inflation of the emergency buoy 3, the position of the net bag 4 is adjusted in time to avoid misalignment of the emergency buoy 3 and the net bag 4.
[0026] S2) Figure 2 As shown, taking the load of the emergency buoy 3 obtained by simulation calculation in the case of forced landing, immersion and towing as the target, the three-coordinate positioning mechanism adjusts the load applied by the diagonal belt 13 to the emergency buoy 3 according to the feedback of the six-component force sensor 12 until the target load is reached, that is, the mechanical environment of the emergency buoy 3 in the case of forced landing, immersion and towing is simulated; during the adjustment process, the three-coordinate positioning mechanism compares the measured load and the target load in the three axes in real time. If the difference between the two in each axis is within 1% of the target load in the corresponding axis, it is determined that the target load is reached. For example, the target loads in the three axes are Fx0, Fy0, and Fz0 respectively, and the measured loads in the three axes are Fx1, Fy1, and Fz1 respectively. When (Fx1-Fx0) / Fx0≤0.01, (Fy1-Fy0) / Fy0≤0.01, and (Fz1-Fz0) / Fz0≤0.01 are satisfied at the same time, it is determined that the target load is reached.
[0027] The device uses a diagonal belt 13 and a net bag 4 to apply a load to the inflated emergency buoy 3, uses a three-coordinate positioning mechanism to adjust the applied load, and uses a six-component force sensor 12 to feedback the applied load. Therefore, the device can simulate the mechanical environment of the emergency buoy 3 in the case of forced landing, immersion and towing through equivalent loading, and can verify the actual performance of the emergency buoy 3.
[0028] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.
Claims
1. An emergency buoy equivalent loading device, characterized in that: It is used to simulate the mechanical environment of the emergency buoy in the event of forced landing, immersion and towing through equivalent loading, and includes a simulated cabin section, an emergency buoy, a net bag, a diagonal belt, a three-coordinate positioning mechanism and a six-component force sensor; the simulated cabin section is used to simulate the actual installation section of the emergency buoy, and the emergency buoy is installed on the simulated cabin section; the net bag is used to fit and wrap the inflated emergency buoy, a number of diagonal belts are connected to the net bag and distributed in the upper area of the inflated emergency buoy, and the diagonal belts are used to diagonally pull the net bag to simulate water resistance and buoyancy load on the inflated emergency buoy; the three-coordinate positioning mechanism can move in three axes and a six-component force sensor is installed at the transmission end thereof, each diagonal belt is connected to the six-component force sensor, and the three-coordinate positioning mechanism is used to adjust the load applied by the diagonal belt to the emergency buoy according to the feedback of the six-component force sensor.
2. The emergency buoy equivalent loading device according to claim 1, characterized in that: Four inclined belts are used and distributed on the front, back, left and right sides of the upper area of the inflated emergency buoy.
3. The emergency buoy equivalent loading device according to claim 1, characterized in that: The outer dimensions of the net bag match those of the inflated emergency float. The net bag is formed by sewing warp belts and weft belts. The warp belts are sewn together at the two end poles and cross-sewn with the weft belts in the middle area.
4. The emergency buoy equivalent loading device according to claim 1, characterized in that: The three-coordinate positioning mechanism includes an X-axis slide rail installed on a mechanism support frame, a Y-axis slide rail driven by an X-axis servo motor to move along the X-axis slide rail, a sliding seat driven by a Y-axis servo motor to move along the Y-axis slide rail, and a Z-axis rod driven by a Z-axis servo motor to rise and fall along the sliding seat. A six-component force sensor is installed at the end of the Z-axis rod.
5. The emergency buoy equivalent loading device according to claim 1, characterized in that: The emergency float is a flexible bladder made of polyurethane tape and filled with air at a certain pressure.
6. The emergency buoy equivalent loading device according to claim 1, characterized in that: The simulated cabin section is installed on the cabin section support frame.
7. An emergency buoy equivalent loading method, characterized in that: Based on the emergency buoy equivalent loading device as described in any one of claims 1 to 6: first place the uninflated emergency buoy in the net bag, then inflate the emergency buoy to the working pressure, so that the net bag completely fits and wraps the inflated emergency buoy, and then connects each diagonal belt to a six-component force sensor; then, taking the load of the emergency buoy in the case of forced landing, immersion and towing obtained by simulation calculation as the target, the three-coordinate positioning mechanism adjusts the load applied by the diagonal belt to the emergency buoy according to the feedback of the six-component force sensor until the target load is reached, that is, the mechanical environment of the emergency buoy in the case of forced landing, immersion and towing is simulated.
8. The method for equivalent loading of emergency buoys according to claim 7, characterized in that: During the adjustment process, the three-coordinate positioning mechanism compares the measured load and the target load in the three axes in real time. If the difference between the two in each axis is within 1% of the target load in the corresponding axis, it is determined that the target load has been reached.
9. The method for equivalent loading of emergency buoys according to claim 7, characterized in that: When inflating the emergency float, adjust the position of the net bag in time to avoid misalignment between the emergency float and the net bag.