Environment simulation device for aircraft tire dynamic simulation test

Abstract

The invention provides an environment simulation device for an aircraft tire dynamic simulation test, and relates to the field of aircraft tire test equipment, the environment simulation device comprises an environment box, a heating circulation system, a liquid nitrogen cooling system and a connecting pipeline; a box body of the environment box is defined by side plates, a top plate and a bottom plate, the side plates comprise the first set of side plates and the second set of side plates which are oppositely arranged, the first set of side plates are each provided with an installation groove used for allowing a tire shaft to penetrate through in the hoisting process, and the environment box further comprises translation sliding doors arranged on the first set of side plates correspondingly; the bottom plate is a split type bottom plate; a pipeline connecting opening is formed in the top plate, and the heating circulating system and the liquid nitrogen cooling system communicate with the pipeline connecting opening through a connecting pipeline and are used for adjusting and controlling the temperature in the environment box. According to the invention, high and low temperature environment simulation can be rapidly carried out without dismounting the tire, and rapid evacuation is carried out, so that the tire is subjected to a dynamic test at a simulated temperature, the test accuracy and safety are improved, and the equipment cost and the operation difficulty are reduced.

Description

Technical Field

[0001] This invention relates to the field of aircraft tire testing equipment technology, and more specifically to an environmental simulation device for dynamic simulation testing of aircraft tires. Background Technology

[0002] Ambient temperature is a crucial factor affecting aircraft safety. Both excessively high and low temperatures can negatively impact tire performance and lifespan, even leading to tire blowouts. With advancements in aviation technology, aircraft ranges and geographical spans are constantly increasing. Takeoffs and landings on runways with varying temperatures, such as in deserts, frigid regions, and aircraft carrier decks, significantly impact tire performance. Currently, the environmental temperature resistance test method in GB / T 9747-2008 (Aircraft Tire Test Method) only specifies that the tire's surface rubber and sidewall rubber be exposed to air at extreme temperatures not exceeding -40℃ and not lower than 71℃ for 24 hours, respectively, before being tested for tensile strength, elongation at break, and other physical properties at the standard temperature specified in GB 2941 to reflect the tire's environmental temperature resistance.

[0003] The test methods specified in the national standard GB / T 9747-2008 "Test Methods for Aircraft Tires" cannot truly and effectively reflect the environmental temperature resistance performance of aircraft tires. In order to truly reflect the environmental temperature resistance performance of aircraft tires, dynamic simulation tests of aircraft tires must be carried out under conditions close to the actual simulated environmental temperature of aircraft tires. Therefore, it is necessary to develop an environmental simulation device on an aircraft tire dynamic simulation testing machine to conduct dynamic simulation tests at this environmental temperature to detect and identify the quality of aircraft tires, check the relevant performance of aircraft tires, and thus truly reflect the environmental temperature resistance performance of aircraft tires.

[0004] Existing dynamic simulation testing machines for aircraft tires mainly consist of flywheels, loading frames, etc. To meet the requirements of environmental simulation and dynamic simulation testing for aircraft tires, there are generally two implementation methods: Method 1: Constructing a giant environmental chamber to house the dynamic simulation testing machine; Method 2: Conducting environmental simulation on the aircraft tires in a smaller environmental chamber before installing them onto the dynamic simulation testing machine. The disadvantages of Method 1 are: 1) The dynamic simulation testing machine is approximately 14m × 5m × 3.5m (length × width × height), and constructing such a large environmental chamber is extremely costly; 2) All mechanical and electrical equipment within the chamber must meet the temperature range required for environmental simulation, placing high demands on the equipment; 3) Placing the testing machine within the environmental chamber results in limited installation space, making it difficult to effectively use forklifts, overhead cranes, and other construction machinery, increasing installation difficulty. The disadvantages of Method 2 are: 1) Simulating ambient temperature, especially high temperature, while the aircraft tire is inflated makes it very easy for the tire to burst; 2) The tires used for environmental simulation in the environmental chamber are manually transported to the dynamic simulation test machine and installed, which takes at least 30 minutes. During this period, the tires exchange heat fully with the indoor air, and the temperature changes significantly, making it impossible to accurately simulate the ambient temperature; 3) Installing the tires under the simulated ambient temperature is different from ordinary installation. High temperature or low temperature protection should be provided for the installers, which increases the need for protective devices, makes installation inconvenient, and increases the difficulty of installation. Summary of the Invention

[0005] In view of this, the present application provides an environmental simulation device for dynamic simulation testing of aircraft tires, so as to accurately simulate the environmental temperature of aircraft tires and conduct dynamic simulation tests without disassembling the aircraft tires, making the test results more accurate, shortening the research and development time, and providing a scientific basis for the development and evaluation of aircraft tires.

[0006] This application provides the following technical solution: an environmental simulation device for dynamic simulation testing of aircraft tires, including an environmental chamber, a heating and circulation system, a liquid nitrogen cooling system, and connecting pipes; the environmental chamber is an independent box that can be hoisted and removed as a whole, and is used to directly fit around the tires already installed on the dynamic simulation testing machine of aircraft tires to form a sealed temperature-controlled cavity;

[0007] The enclosure of the environmental chamber is composed of side panels, a top panel and a bottom panel. The side panels include a first set of side panels and a second set of side panels arranged opposite to each other. The first set of side panels is provided with mounting grooves for the tire axle to pass through during hoisting. The groove depth extends from the bottom edge of the side panel to the center of the side panel, and the bottom of the groove is an arc shape adapted to the shape of the tire axle. The environmental chamber also includes sliding doors respectively set on the first set of side panels. The sliding doors include a left door and a right door. Semi-circular mounting holes are opened on the left door and the right door respectively. The left door and the right door are driven by cylinders. After the left door and the right door are closed by the cylinders, the semi-circular mounting holes on both sides surround to form a circular hole that matches the shape of the tire axle and corresponds to the position of the arc-shaped bottom of the mounting groove, so as to form a sealing structure between the tire axle surface and the side wall of the chamber. The base plate is a split base plate, including a left base plate and a right base plate. The left base plate and the right base plate are respectively hinged to the bottom of the second set of side plates, so that the split base plate closes by gravity to form the bottom of the box when the environmental box is hoisted and lowered, and automatically opens by gravity around the hinge axis when the environmental box is hoisted away. A pipe connection port is provided on the top plate, and the heating circulation system and liquid nitrogen cooling system are connected to the pipe connection port through the connecting pipe to regulate and control the temperature inside the environmental chamber.

[0008] According to one embodiment of this application, the device further includes a control system, which is connected to the heating circulation system, the liquid nitrogen cooling system, and the cylinder control system, and is used to control the operation of the heating circulation system, the liquid nitrogen cooling system, and the cylinder.

[0009] According to one embodiment of this application, the environmental chamber further includes a lifting lug, which is fixed to the top of the environmental chamber and used to connect a lifting device.

[0010] According to one embodiment of this application, the environmental chamber further includes an observation window, which is opened on the side panel.

[0011] According to one embodiment of this application, a stirring fan is provided at the top of the inner cavity of the environmental chamber to make the temperature inside the environmental chamber uniform.

[0012] According to one embodiment of this application, sealing edges are respectively provided on the sides of the left bottom plate and the right bottom plate, so that when the two parts of the split bottom plate are closed, a sealing structure is formed at the middle seam.

[0013] According to one embodiment of this application, the left bottom plate and the right bottom plate are respectively hinged to the bottom of the second set of side plates.

[0014] According to one embodiment of this application, the enclosure of the environmental chamber is made of thermal insulation material.

[0015] Compared with the prior art, the beneficial effects achieved by at least one of the above-mentioned technical solutions adopted in the embodiments of this specification include at least the following: This device can directly simulate high and low temperature environments while the aircraft tire is already installed on the dynamic simulation testing machine, avoiding heat loss and temperature changes caused by tire handling and disassembly in traditional methods. This ensures that the tire remains at the simulated target ambient temperature during dynamic testing, thereby making the test data more realistic and reliable, and better reflecting the performance of the aircraft tire in actual extreme environments. Furthermore, the environmental chamber only covers the tire area, is small in size and compact in structure, suitable for installation in existing testing machine layouts, improving space utilization efficiency and reducing equipment costs. This device can be operated remotely and automatically, ensuring operator safety and reducing operational difficulty. Moreover, installation is performed after the tire is installed, effectively avoiding the influence of temperature on the installer during environmental simulation. 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 overall structure of the environmental simulation device for dynamic simulation testing of aircraft tires according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the side panel structure of the environmental chamber according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the sliding door structure of the environmental enclosure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the split-type bottom plate structure of the environmental chamber according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the overall structure of the environmental chamber according to an embodiment of the present invention; Among them, 1-pipe connection port, 2-observation window, 3-box body, 4-lifting lug, 5-cylinder, 6-sliding door, 7-split base plate, 8-hinge, 9-tire axle. 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 an environmental simulation device for dynamic simulation testing of aircraft tires, including an environmental chamber, a heating and circulation system, a liquid nitrogen cooling system, and connecting pipes; the environmental chamber is an independent box that can be hoisted and removed as a whole, and is used to directly fit around the tires already installed on the aircraft tire dynamic simulation testing machine to form a sealed temperature-controlled cavity; The enclosure of the environmental chamber is composed of side panels, a top panel and a bottom panel. The side panels include a first set of side panels and a second set of side panels arranged opposite to each other. The first set of side panels is provided with mounting grooves for the tire axle to pass through during hoisting. The groove depth extends from the bottom edge of the side panel to the center of the side panel, and the bottom of the groove is an arc shape adapted to the shape of the tire axle. The environmental chamber also includes sliding doors respectively set on the first set of side panels. The sliding doors include a left door and a right door. Semi-circular mounting holes are opened on the left door and the right door respectively. The left door and the right door are driven by cylinders. After the left door and the right door are closed by the cylinders, the semi-circular mounting holes on both sides surround to form a circular hole that matches the shape of the tire axle and corresponds to the position of the arc-shaped bottom of the mounting groove, so as to form a sealing structure between the tire axle surface and the side wall of the chamber. The base plate is a split base plate, including a left base plate and a right base plate. The left base plate and the right base plate are respectively hinged to the bottom of the second set of side plates, so that the split base plate closes by gravity to form the bottom of the box when the environmental box is hoisted and lowered, and automatically opens by gravity around the hinge axis when the environmental box is hoisted away. A pipe connection port is provided on the top plate, and the heating circulation system and liquid nitrogen cooling system are connected to the pipe connection port through the connecting pipe to regulate and control the temperature inside the environmental chamber.

[0021] The present invention designs a split-type environmental chamber, which separates the heating circulation system, liquid nitrogen cooling system, and control system from the environmental chamber, thereby reducing the size of the environmental chamber and enabling it to be installed in the narrow installation space of the dynamic simulation test machine.

[0022] In one embodiment of the present invention, the device further includes a control system, which is connected to the heating circulation system, the liquid nitrogen cooling system, and the cylinder control system, and is used to control the operation of the heating circulation system, the liquid nitrogen cooling system, and the cylinder. By separating the heating circulation system, the liquid nitrogen cooling system, the control system, and the environmental chamber, the present invention significantly reduces the volume of the environmental chamber, eliminating the need to construct a large environmental chamber to accommodate the entire testing machine, thus saving high construction and operating costs. The environmental chamber only covers the tire area, has a compact structure, and is suitable for installation in existing testing machine layouts, improving space utilization efficiency.

[0023] In addition, the control system can integrate multiple temperature control modes to adapt to a wide range of environmental simulation needs from low temperature to high temperature, and has good versatility and engineering application prospects.

[0024] In one embodiment of the present invention, the environmental chamber further includes lifting lugs fixed to the top of the environmental chamber for connecting lifting equipment. The environmental chamber also includes an observation window located on the side panel. The entire environmental simulation process of the present invention can be remotely automated, eliminating the need for operators to work at close range in high or low temperature environments, thus avoiding the risk of tire blowouts that may occur during tire removal and installation at extreme temperatures. The environmental chamber is installed and removed as a whole using a hoisting method, and the split base plate automatically opens during hoisting without manual intervention, ensuring personnel safety and simplifying the operation process.

[0025] In one embodiment of the invention, a stirring fan is installed at the top of the inner cavity of the environmental chamber to ensure uniform temperature within the chamber. After the environmental chamber is in place, it can be quickly connected to a temperature control system via connecting pipes, and the stirring fan ensures uniform temperature within the chamber. After simulation is complete, the environmental chamber can be immediately lifted out, allowing dynamic testing of the tires to begin before significant temperature changes, achieving a seamless transition between environmental simulation and dynamic testing, thus improving testing efficiency.

[0026] In one embodiment of the present invention, the left bottom plate and the right bottom plate are respectively hinged to the bottom of the second set of side plates. Specifically, the left and right bottom plates are respectively provided with sealing edges on their sides, so that when the two parts of the split bottom plate are closed, a sealing structure is formed at the joint between them. This embodiment achieves reliable sealing of the through-shaft area through the cooperation of the slotted side panels and the sliding door; the split bottom plate is connected to the housing by hinges, and gravity is used to achieve closure and automatic opening, ensuring both bottom sealing during environmental simulation and ensuring no parts remain during removal, thus not affecting the normal operation of the testing machine.

[0027] During testing, the aircraft tire and the dynamic simulation testing machine are connected via a tire axle and are pre-installed. A sliding door is designed to solve the through-axle sealing problem. First, the cylinder controls the sliding door to fully open. Using the lifting lugs of the factory crane, the environmental chamber is placed on the dynamic simulation testing machine through the tire axle from the top of the aircraft tire. The cylinder controls the movable sealing door to close, completing the seal together with the tire axle. After the environmental simulation is completed, the environmental chamber needs to be removed as a whole. The split base plate of the environmental chamber also needs to be removed along with the chamber. The base plate is designed as a split plate, consisting of two parts, each connected to the chamber body by hinges. During removal, the lifting lugs are lifted by the crane, and the two parts of the split base plate automatically separate and open, then are lifted away from the working area of ​​the testing machine by the hinges.

[0028] This invention simulates the environment of installed aircraft tires on an aircraft tire dynamic simulation testing machine. After the simulation, the machine is quickly evacuated. The aircraft tires can undergo dynamic simulation testing at near-realistic ambient temperatures for inspection and evaluation. This invention achieves rapid environmental simulation of aircraft tires in their installed state, avoiding temperature loss and the risks of manual operation, thus improving the accuracy and safety of the test.

[0029] In specific implementation, the device of this invention consists of an environmental chamber, connecting pipes, a heating and circulation system, a liquid nitrogen cooling system, a control system, and other accessories, as shown in the installation diagram of the dynamic simulation test machine. Figure 1 As shown in the diagram. The environmental chamber is directly mounted on the testing machine, while the heating and circulation system, liquid nitrogen cooling system, and control system are located outside the testing machine. The heating and circulation system and liquid nitrogen cooling system are connected to the environmental chamber via connecting pipes to control the temperature inside the chamber, simulating a near-realistic aircraft tire environment. A stirring fan is installed on the top of the environmental chamber to ensure uniform temperature distribution within the chamber. Figure 1 As shown, the environmental chamber includes a chamber body 3, an observation window 2 on the side wall of the chamber body 3, a cylinder 5 and a sliding door 6 fixedly installed on the side wall below the observation window 2. The cylinder 5 drives the sliding door 6 to open and close. The top of the chamber body 3 is also equipped with a lifting lug 4 and a pipe connection port 1. The bottom is a split base plate 7, which is hinged to the side wall by hinges 8. The environmental chamber is installed on a dynamic simulation test machine to form a closed cavity for environmental simulation of the aircraft tire. After the environmental simulation is completed, the environmental simulation device is lifted off the dynamic simulation test machine by the lifting lug 4.

[0030] like Figure 2 As shown, since the tire is pre-installed on the dynamic simulation testing machine, the tire's mounting shaft is connected to the loading frame of the testing machine. To achieve a sealed environmental chamber, slots are cut into the side panels of the environmental chamber, allowing the side panels to be installed from the top of the testing machine downwards. Figure 3As shown, sliding doors 6 are installed on both side panels, driven by cylinders 5. The movement of the sliding doors 6, together with the tire axle 9, achieves sealing of the environmental chamber. Furthermore, to ensure the cooling efficiency of the environmental chamber, the bottom and sides should be made of the same material. After the environmental simulation process is completed, the bottom plate of the environmental chamber should be removed, and no items should be left in the direction of the loading frame's movement. To improve efficiency, ensure that the bottom plate is removed from the testing machine simultaneously with the environmental chamber removal. A separate bottom plate is connected to the two non-slotted side panels of the environmental chamber, such as... Figure 4 As shown, the split base plate is connected to the side by hinges. During the lifting of the environmental chamber, the split base plate uses its own weight to open the bottom of the environmental chamber, and the split base plate and the environmental chamber are lifted and removed from the testing machine together.

[0031] The environmental simulation test process of the aviation tire dynamic simulation testing machine in this embodiment of the invention is as follows: 1) The tire axle and auxiliary tooling are installed into the testing machine; 2) The environmental chamber is lifted, and the slots on both side plates are aligned with the two ends of the tire axle. The environmental chamber is then lowered, and the bottom of the environmental chamber is sealed using a split hinge; 3) The sliding door is moved by a drive cylinder to seal the tire axle; 4) A high / low temperature resistant hose is used to connect the environmental chamber to the heating circulation system or liquid nitrogen cooling system; 5) The control system is activated to simulate the aviation tire environment; 6) After the simulation is completed, the environmental chamber is quickly removed from the test area using the lifting lugs of a factory crane. Figure 5 As shown; 7) The dynamic simulation testing machine conducts dynamic tests with environmental simulation.

[0032] The device of this invention can conduct dynamic performance tests under conditions close to real-world ambient temperatures, providing more scientific test data support for the design improvement, quality assessment, and safety certification of aircraft tires, helping to shorten the research and development cycle and improve the environmental adaptability and reliability of tires.

[0033] 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. An environmental simulation device for dynamic simulation testing of aircraft tires, characterized in that, It includes an environmental chamber, a heating and circulation system, a liquid nitrogen cooling system, and connecting pipes; the environmental chamber is an independent box that can be hoisted and removed as a whole, and is used to directly fit around the tires already installed on the aircraft tire dynamic simulation test machine to form a sealed temperature-controlled cavity; The enclosure of the environmental chamber is composed of side panels, a top panel and a bottom panel. The side panels include a first set of side panels and a second set of side panels arranged opposite to each other. The first set of side panels is provided with mounting grooves for the tire axle to pass through during hoisting. The groove depth extends from the bottom edge of the side panel to the center of the side panel, and the bottom of the groove is an arc shape adapted to the shape of the tire axle. The environmental chamber also includes sliding doors respectively set on the first set of side panels. The sliding doors include a left door and a right door. Semi-circular mounting holes are opened on the left door and the right door respectively. The left door and the right door are driven by cylinders. After the left door and the right door are closed by the cylinders, the semi-circular mounting holes on both sides surround to form a circular hole that matches the shape of the tire axle and corresponds to the position of the arc-shaped bottom of the mounting groove, so as to form a sealing structure between the tire axle surface and the side wall of the chamber. The base plate is a split base plate, including a left base plate and a right base plate. The left base plate and the right base plate are respectively hinged to the bottom of the second set of side plates, so that the split base plate closes by gravity to form the bottom of the box when the environmental box is hoisted and lowered, and automatically opens by gravity around the hinge axis when the environmental box is hoisted away. A pipe connection port is provided on the top plate, and the heating circulation system and liquid nitrogen cooling system are connected to the pipe connection port through the connecting pipe to regulate and control the temperature inside the environmental chamber.

2. The environmental simulation device for dynamic simulation testing of aircraft tires according to claim 1, characterized in that, The device also includes a control system, which is connected to the heating circulation system, the liquid nitrogen cooling system and the cylinder control system, and is used to control the operation of the heating circulation system, the liquid nitrogen cooling system and the cylinder.

3. The environmental simulation device for dynamic simulation testing of aircraft tires according to claim 1, characterized in that, The environmental enclosure also includes lifting lugs, which are fixed to the top of the environmental enclosure and used to connect lifting equipment.

4. The environmental simulation device for dynamic simulation testing of aircraft tires according to claim 1, characterized in that, The environmental enclosure also includes an observation window, which is located on the side panel.

5. The environmental simulation device for dynamic simulation testing of aircraft tires according to claim 1, characterized in that, A stirring fan is installed at the top of the inner cavity of the environmental chamber to ensure uniform temperature within the chamber.

6. The environmental simulation device for dynamic simulation testing of aircraft tires according to claim 1, characterized in that, The left and right bottom plates are respectively provided with sealing edges so that when the two parts of the split bottom plate are closed, a sealing structure is formed at the seam between them.

7. The environmental simulation device for dynamic simulation testing of aircraft tires according to claim 1, characterized in that, The left bottom plate and the right bottom plate are respectively hinged to the bottom of the second set of side plates.

8. The environmental simulation device for dynamic simulation testing of aircraft tires according to claim 1, characterized in that, The enclosure of the environmental chamber is made of thermal insulation material.

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