A shell testing device for high temperature axial pressure composite loading environment

Abstract

A shell testing device for use in a high-temperature axial-compression composite loading environment includes a load-bearing crossbeam, a static loading test system, a loading cooling system, a high-temperature oven, a ball head and ball socket integrated loading system, a centering device, a load-bearing tooling, a load-bearing column, a supporting device, and a load-bearing foundation. The advantages of the present invention are that it solves the problem of how to implement the shell in a high-temperature axial-compression composite loading environment, as well as the problem of inaccurate shell assessment boundaries and untrue test data caused by uneven loading and misalignment of the shell in a high-temperature axial-compression composite environment, and avoids overheating and damage to the loading equipment of the shell in a high-temperature axial-compression composite environment, resulting in test interruption or even damage to the test piece. The present invention breaks through the test environment that cannot be achieved by a standard tension and compression testing machine, and can meet the test requirements of the shell in a harsh environment where the exposure temperature is as high as 500 degrees or even higher and the axial pressure is as high as 50 tons or even higher.

Description

Technical Field

[0001] The invention relates to the field of high-temperature axial-compression composite loading tests on shells, and in particular to a shell testing device used in a high-temperature axial-compression composite loading environment. Background Art

[0002] The shell is a common structure in rocket engine compartments. During operation, it will be subjected to complex mechanical and thermal environments such as high temperature and axial pressure. High-temperature axial pressure test is a method to assess the strength and reliability of rocket engine shells in mechanical and thermal environments. It is used to determine the functional reliability and structural integrity of the engine shell in a high-temperature axial pressure composite environment. The standard tension and compression testing machine can perform material-level composite tension and compression tests in conjunction with a temperature chamber to achieve the assessment of the product in the working environment, thereby verifying the mechanical properties of the structure. During the composite loading process, the three difficult problems that need to be solved are the composite loading implementation device, the uniformity and centering of the axial pressure environment, and the high-temperature cooling of the loading equipment. With the increase in the speed of the aircraft, the requirements for the assessment of the engine shell are becoming more and more stringent. The shell is exposed to temperatures as high as 500 degrees or even higher, and the axial pressure is as high as 50 tons or even higher. The standard tension and compression testing machine cannot meet the assessment of the structure in this special environment. How to solve the above technical problems is a technical difficulty faced by this field. Summary of the invention

[0003] According to the above technical problems, the present invention provides a shell test device for high-temperature axial pressure composite loading environment, including a load-bearing crossbeam, a static loading test system, a loading cooling system, a high-temperature oven, a ball head and ball socket integrated loading system, a centering device, a load-bearing tooling, a load-bearing column, a supporting device, and a load-bearing foundation. The load-bearing foundation is symmetrically provided with load-bearing columns on the left and right, and a load-bearing crossbeam is provided on the top of the load-bearing column. The upper and lower ends of the load-bearing column are respectively fixedly connected with the load-bearing foundation and the load-bearing crossbeam by bolts. A high-temperature oven is provided between the load-bearing columns, and a supporting device is provided at the bottom of the high-temperature oven. The supporting device is fixedly installed on the load-bearing foundation by bolts.

[0004] A static loading test system is provided at the middle position of the bottom of the load-bearing crossbeam, a loading cooling system is provided at the bottom of the static loading test system, a ball head and ball socket integrated loading system is fixedly connected to the bottom of the loading cooling system, and the ball head and ball socket integrated loading system extends from the top of the high-temperature oven to the inside of the high-temperature oven;

[0005] A load-bearing tooling is provided on the load-bearing foundation at the bottom of the high-temperature oven;

[0006] The load-bearing tooling further comprises a load-bearing platform, a force-adding cap, and a cage-shaped frame. The cage-shaped frame is a cylindrical structure. The load-bearing platform is concentrically arranged on the top of the cage-shaped frame. A force-adding cap is arranged at the center of the load-bearing platform. The bottom of the cage-shaped frame is fixedly installed on the load-bearing foundation. The top of the cage-shaped frame extends from the bottom of the high-temperature oven into the interior of the high-temperature oven.

[0007] A centering device is provided on the top surface of the load-bearing platform.

[0008] Furthermore, the static loading test system is composed of a controller and a servo actuator. The controller is arranged in a measurement and control room, wherein the servo actuator further comprises a hydraulic servo valve, an oil return port, an oil inlet, a hydraulic actuator cylinder, a displacement sensor, and a force sensor. The hydraulic servo valve is arranged on the hydraulic actuator cylinder, the oil return port and the oil inlet are arranged on both sides of the hydraulic servo valve, respectively, the force sensor is installed on the top of the hydraulic actuator cylinder and is connected to the controller through an aviation plug, and the displacement sensor is arranged on the top of the hydraulic actuator cylinder;

[0009] Furthermore, the loading cooling system further comprises a water tank, a submersible pump, a water inlet, and a water return port. The submersible pump is arranged in the water tank, and the submersible pump is connected to the water inlet and the water return port through pipelines.

[0010] Furthermore, the loading and cooling system is a transition section structure, one end of which is connected to the force sensor through a thread, and the other end of which is connected to the ball head and ball socket integrated loading system through a thread.

[0011] Furthermore, the ball head and socket integrated loading system comprises a ball head, a ball head pressure plate, and a ball socket. The ball head is nested in the ball socket, and the three are connected into one through a threaded connection between the ball socket pressure plate and the ball socket.

[0012] Furthermore, the centering device includes an adjusting ring, a mounting plate, and a threaded push rod. The adjusting ring is concentrically placed on the top surface of the bearing platform, and the mounting plates are evenly distributed on the outer circumference of the adjusting ring. The mounting plate is an L-shaped structure, and the long plate of the L-shaped structure is fixed on the bearing platform by screws. A certain gap is left between the short plate of the L-shaped structure and the adjusting ring, and threaded holes are opened on it, and a threaded push rod is installed in each of the threaded holes.

[0013] Furthermore, the number of the mounting plates is 4.

[0014] Furthermore, the high temperature oven is heated by electric heating.

[0015] The beneficial effects of the present invention are as follows: the present invention is a shell testing device for use in a high-temperature axial-compression composite loading environment. By setting a high-temperature oven, a static loading test system, and a loading cooling system, the implementation method of the shell in a high-temperature axial-compression composite loading environment is solved, as well as the problems of inaccurate shell assessment boundaries and untrue test data caused by uneven loading and misalignment of the shell in a high-temperature axial-compression composite environment. The shell is prevented from being overheated and damaged by the loading equipment in a high-temperature axial-compression composite environment, resulting in test interruption or even damage to the test piece. Among them, the ball head and ball socket integrated loading system has adaptive leveling and decoupling functions, which can ensure the stability and uniformity of the loading process. The present invention breaks through the test environment that cannot be achieved by standard tension and compression testing machines, and can meet the test requirements of the shell in harsh environments where the exposure temperature is as high as 500 degrees or even higher and the axial pressure is as high as 50 tons or even higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the main structure diagram of the present invention;

[0017] Figure 2 It is a schematic diagram of the positional relationship between the loading and cooling system, the ball head and socket integrated loading system, the test piece and the centering device;

[0018] Figure 3 It is a structural diagram of the static loading test system and the loading cooling system;

[0019] Figure 4 It is a structural schematic diagram of the ball head and ball socket integrated loading system;

[0020] Figure 5 It is a schematic diagram of the load-bearing platform structure of the centering device and the load-bearing tooling;

[0021] Figure 6 It is a schematic diagram of the load-bearing tooling structure.

[0022] As shown in the figure, load-bearing beam-1, static loading test system-2, loading and cooling system-3, high temperature oven-4, ball head and socket integrated loading system-5, test piece-6, centering device-7, load-bearing tooling-8, load-bearing column-9, support device-10, load-bearing foundation-11;

[0023] Hydraulic servo valve-201, oil return port-202, oil inlet-203, hydraulic actuator-204, displacement sensor-205, force sensor-206;

[0024] Water tank-301, submersible pump-302, water inlet-303, water return port-304;

[0025] Ball head-501, ball head pressure plate-502, ball socket-503;

[0026] Adjusting ring-701, mounting plate-702, threaded ejector rod-703;

[0027] Load-bearing platform-801, force-adding cap-802, cage frame-803. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings: The present invention is a shell testing device for use in a high-temperature axial pressure composite loading environment, comprising a load-bearing crossbeam 1, a static loading test system 2, a loading cooling system 3, a high-temperature oven 4, a ball head and ball socket integrated loading system 5, a centering device 7, a load-bearing tooling 8, a load-bearing column 9, a supporting device 10, and a load-bearing foundation 11, wherein the load-bearing columns 9 are symmetrically arranged on the left and right of the load-bearing foundation 11, and a load-bearing crossbeam 1 is arranged on the top of the load-bearing column 9, and the upper and lower ends of the load-bearing column 9 are respectively fixedly connected to the load-bearing foundation 11 and the load-bearing crossbeam 1 by bolts, and a high-temperature oven 4 is arranged between the load-bearing columns 9, and a supporting device 10 is arranged at the bottom of the high-temperature oven 4, and the supporting device 10 is fixedly installed on the load-bearing foundation 11 by bolts;

[0029] A static loading test system 2 is provided at the middle position of the bottom of the load-bearing crossbeam 1, a loading cooling system 3 is provided at the bottom of the static loading test system 2, a ball head and ball socket integrated loading system 5 is fixedly connected to the bottom of the loading cooling system 3, and the ball head and ball socket integrated loading system 5 extends from the top of the high-temperature oven 4 into the interior of the high-temperature oven 4;

[0030] A load-bearing tooling 8 is provided on the load-bearing foundation 11 at the bottom of the high-temperature oven 4;

[0031] The load-bearing tooling 8 further comprises a load-bearing platform 801, a force-adding cap 802, and a cage frame 803. The cage frame 803 is a cylindrical structure. The load-bearing platform 801 is concentrically arranged on the top of the cage frame 803. A force-adding cap 802 is arranged at the center of the load-bearing platform 801. The bottom of the cage frame 803 is fixedly installed with the load-bearing foundation 11. The top of the cage frame 803 extends from the bottom of the high-temperature oven 4 into the interior of the high-temperature oven 4.

[0032] A centering device 7 is provided on the top surface of the bearing platform 801 .

[0033] Furthermore, the static loading test system 2 is composed of a controller and a servo actuator. The controller is arranged in a measurement and control room, wherein the servo actuator further comprises a hydraulic servo valve 201, an oil return port 202, an oil inlet 203, a hydraulic actuator 204, a displacement sensor 205, and a force sensor 206. The hydraulic servo valve 201 is arranged on the hydraulic actuator 204, the oil return port 202 and the oil inlet 203 are arranged on both sides of the hydraulic servo valve 201, respectively, the force sensor 206 is installed at the top of the hydraulic actuator 204 and is connected to the controller through an aviation plug, and the displacement sensor 205 is arranged at the top of the hydraulic actuator 204;

[0034] Furthermore, the loading cooling system 3 includes a water tank 301, a submersible pump 302, a water inlet 303, and a water return port 304. The submersible pump 302 is arranged in the water tank 301, and the submersible pump 302 is connected to the water inlet 303 and the water return port 304 through pipelines.

[0035] Furthermore, the loading and cooling system 3 is a transition section structure, one end of which is connected to the force sensor 206 through a thread, and the other end of which is connected to the ball head and ball socket integrated loading system 5 through a thread.

[0036] Furthermore, the ball head and socket integrated loading system 5 includes a ball head 501, a ball head pressure plate 502, and a ball socket 503. The ball head 501 is nested in the ball socket 503, and the three are connected into one through a threaded connection between the ball socket pressure plate 502 and the ball socket 503.

[0037] Furthermore, the centering device 7 includes an adjusting ring 701, a mounting plate 702, and a threaded push rod 703. The adjusting ring 701 is concentrically placed on the top surface of the bearing platform 801. The mounting plates 702 are evenly distributed on the outer circumference of the adjusting ring 701. The mounting plates 702 are L-shaped structures. The long plates of the L-shaped structure are fixed on the bearing platform 801 by screws. A certain gap is left between the short plates of the L-shaped structure and the adjusting ring 701, and threaded holes are opened thereon. A threaded push rod 703 is installed in each of the threaded holes.

[0038] Furthermore, the number of the mounting plates 702 is 4.

[0039] Furthermore, the high temperature oven 4 is heated by electric heating.

[0040] Working principle: When the test piece 6 is subjected to the high-temperature axial compression composite loading test, the load-bearing crossbeam 1, the load-bearing tooling 8, the load-bearing column 9, the support device 10, and the load-bearing foundation 11 mainly serve as the platform and auxiliary functions of the entire system. First, the test piece 6 is adjusted to the center position of the static loading test system 2 through the centering device 7 on the load-bearing tooling 8. The specific adjustment method is: adjust the four threaded push rods 703 evenly distributed 90° around the adjustment ring 701 to drive the adjustment ring 701 and the test piece 6 to move left and right and front and back. After reaching the center position, mark the line and calibrate, then close the door of the high-temperature oven 4, and the high-temperature oven 4 starts working. At the same time, the loading and cooling system 3 is turned on. The loading and cooling system 3 mainly drives the water inlet at one end of the pipeline and the water outlet at the other end through the submersible pump 302 to take away the heat transferred to the device by the high temperature. When the high-temperature oven 4 stabilizes to the required temperature, the static loading system 2 drives the ball head and ball socket integrated loading system 5 to perform high-temperature axial compression composite loading. The static loading test system 2 is used to apply the test piece 6 Add axial pressure. During the test, the hydraulic servo valve 201 is connected to the controller to control the extension of the hydraulic actuator 204 to apply axial pressure to the test piece 6. The size of the axial pressure is fed back to the controller through the force sensor 206 for control; the ball head and socket integrated loading system 5 consists of a ball head 501, a ball socket pressure plate 502 and a ball socket 503. The three are connected into one through the threaded connection between the ball socket pressure plate 502 and the ball socket 503. During the axial pressure application process, the ball head 501 drives the ball socket 503 to rotate and decouple to achieve the stability and uniformity of the axial pressure; the load-bearing tooling 8 is mainly composed of a cage frame 803 and a force cap 802, which is mainly used to withstand the strength and rigidity during the axial pressure process, ensure the stability and reliability of the load-bearing platform 801, and ensure that the test piece 6 completes the test assessment.

[0041] The present invention solves the problem of how to implement the shell in a high-temperature axial-pressure composite loading environment, as well as the problem of inaccurate shell assessment boundaries and untrue test data due to uneven loading and misalignment of the shell in a high-temperature axial-pressure composite environment, by providing a high-temperature oven, a static loading test system, and a loading cooling system. It avoids the situation in which the shell loading equipment is overheated and damaged in a high-temperature axial-pressure composite environment, resulting in test interruption or even damage to the test piece. Among them, the ball head and ball socket integrated loading system has adaptive leveling and decoupling functions, which can ensure the stability and uniformity of the loading process. The present invention breaks through the test environment that cannot be achieved by standard tension and compression testing machines, and can meet the test requirements of the shell in harsh environments where the exposure temperature is as high as 500 degrees or even higher and the axial pressure is as high as 50 tons or even higher.

[0042] The above description is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A shell testing device for high temperature axial pressure composite loading environment, characterized in that: It includes a load-bearing crossbeam, a static loading test system, a loading cooling system, a high-temperature oven, a ball head and ball socket integrated loading system, a centering device, a load-bearing tooling, a load-bearing column, a supporting device, and a load-bearing foundation. The load-bearing columns are symmetrically arranged on the left and right of the load-bearing foundation. The top of the load-bearing column is provided with a load-bearing crossbeam. The upper and lower ends of the load-bearing column are respectively fixedly connected with the load-bearing foundation and the load-bearing crossbeam by bolts. A high-temperature oven is arranged between the load-bearing columns. A supporting device is arranged at the bottom of the high-temperature oven. The supporting device is fixedly installed on the load-bearing foundation by bolts. A static loading test system is provided at the middle position of the bottom of the load-bearing crossbeam, a loading cooling system is provided at the bottom of the static loading test system, a ball head and ball socket integrated loading system is fixedly connected to the bottom of the loading cooling system, and the ball head and ball socket integrated loading system extends from the top of the high-temperature oven to the inside of the high-temperature oven; A load-bearing tooling is provided on the load-bearing foundation at the bottom of the high-temperature oven; The load-bearing tooling further comprises a load-bearing platform, a force-adding cap, and a cage-shaped frame. The cage-shaped frame is a cylindrical structure. The load-bearing platform is concentrically arranged on the top of the cage-shaped frame. A force-adding cap is arranged at the center of the load-bearing platform. The bottom of the cage-shaped frame is fixedly installed on the load-bearing foundation. The top of the cage-shaped frame extends from the bottom of the high-temperature oven into the interior of the high-temperature oven. The top surface of the bearing platform is provided with a centering device; The ball head and socket integrated loading system further comprises a ball head, a ball head pressure plate, and a ball socket, wherein the ball head is nested in the ball socket, and the three are connected into one by a threaded connection between the ball socket pressure plate and the ball socket; The centering device further comprises an adjusting ring, a mounting plate and a threaded push rod. The adjusting ring is concentrically placed on the top surface of the bearing platform. The outer circumference of the adjusting ring is evenly distributed with mounting plates. The mounting plate is an L-shaped structure. The long plate of the L-shaped structure is fixed on the bearing platform by screws. A certain gap is left between the short plate of the L-shaped structure and the adjusting ring, and threaded holes are opened on it. A threaded push rod is installed in each of the threaded holes.

2. The shell testing device for high temperature axial pressure combined loading environment according to claim 1 is characterized in that: The static loading test system consists of two parts: a controller and a servo actuator. The controller is arranged in a measurement and control room, wherein the servo actuator includes a hydraulic servo valve, an oil return port, an oil inlet, a hydraulic actuator cylinder, a displacement sensor, and a force sensor. The hydraulic servo valve is arranged on the hydraulic actuator cylinder, and the oil return port and the oil inlet are respectively arranged on both sides of the hydraulic servo valve. The force sensor is installed at the top of the hydraulic actuator cylinder and is connected to the controller through an aviation plug. The displacement sensor is arranged on the top of the hydraulic actuator cylinder.

3. The shell testing device for high temperature axial pressure combined loading environment according to claim 1 is characterized in that: The loading cooling system further comprises a water tank, a submersible pump, a water inlet and a water return port. The submersible pump is arranged in the water tank and is connected to the water inlet and the water return port through pipelines.

4. A shell testing device for high temperature axial pressure combined loading environment according to claim 2 or 3, characterized in that: The loading and cooling system is a transition section structure, one end of which is connected to the force sensor through a thread, and the other end of which is connected to the ball head and ball socket integrated loading system through a thread.

5. The shell testing device for high temperature axial pressure combined loading environment according to claim 1 is characterized in that: The number of the mounting plates is 4.

6. The shell testing device for high temperature axial pressure combined loading environment according to claim 1 is characterized in that: The high temperature oven is heated by electric heating.

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