CN112525578B - Environmental test device and test method for self-heating device - Google Patents
Environmental test device and test method for self-heating device Download PDFInfo
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- CN112525578B CN112525578B CN202011447856.5A CN202011447856A CN112525578B CN 112525578 B CN112525578 B CN 112525578B CN 202011447856 A CN202011447856 A CN 202011447856A CN 112525578 B CN112525578 B CN 112525578B
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Abstract
The invention discloses an environment test device and a test method for a self-heating device, wherein a temperature and static force loading test device is integrally designed on the basis of a vibration sliding table top, so that the cooperative loading of vibration, temperature and static force loading loads is realized; meanwhile, by utilizing the design of the vibration sliding table top and the pendulum hammer beating block, the moving direction of the vibration sliding table top generated when the pendulum hammer beating block beats the vibration sliding table top and the vibration direction of the vibration table are in the same horizontal position, and by utilizing the design of a stop block, limiting and the like, the cooperative loading of the impact load and the vibration load is realized, and finally the four comprehensive loading of vibration, temperature, static force and impact load can be realized; the formulation of the load environment and the test flow encountered by the self-heating device in the using process can standardize the test steps and the operation of the related composite environment test of the space detector test piece, and provide technical support for the standardized development and the standardized research of the related test.
Description
Technical Field
The invention belongs to the technical field of self-heating devices, and particularly relates to an environment test device and an environment test method for a self-heating device.
Background
The self-heating device comprises a space heat source/power supply device for deep space exploration such as an isotope heat source/power supply and the like, is a device for providing heat energy/energy for space equipment and instruments by utilizing heat generated by radioactive materials, and is widely applied to various exploration tasks in a deep space environment due to the characteristics of long service life, high reliability, continuous heat supply and the like. Through statistics, countries such as America and Europe have used hundreds of space self-heating devices in a plurality of space missions, including pioneer numbers, traveler numbers and the like, and the service life of the devices exceeds 30 years.
Among the deep space exploration tasks that have been developed in the past, a lunar exploration task is taken as an example, as shown in fig. 1. The self-heating device is subjected to actions of launching, flying, track correction, circular moon track injection, lunar explorer separation, landing, moon work and the like during service, and is subjected to launching vibration, impact, flying static force, track correction impact, landing static force, impact and temperature load action accompanying the whole process, as shown in figure 2. The respective types of loads act on the self-heating device simultaneously and sequentially. Therefore, in order to guarantee the viability of the self-heating device under the action of complex environmental loads and verify the reasonability of product design, it is necessary to develop a comprehensive environmental test technology research of the self-heating device, develop a comprehensive environmental test device for temperature, impact, vibration and static force of the self-heating device product, establish a test method and provide reliable guarantee for the development of the self-heating device product.
Through research, the environmental suitability test of the self-heating device in countries such as America and Europe mainly focuses on single environmental tests, such as the development of single tests of temperature, vibration, impact and the like. Reports related to a composite environment test type loaded by a load system such as static force and impact are not found.
Compared with countries such as America and Europe, the development and application of the self-heating device in China still belong to the starting stage, and the self-heating device has single load loading environment test capabilities such as temperature, vibration, impact and static force at present. The test capability of the temperature-vibration, temperature-impact and other composite environments is in a research stage, and no report and related test methods for the test capability of the temperature-vibration-impact-static four-comprehensive environment of the self-heating device are found.
The disadvantages of the conventional techniques are:
1. the single load cannot truly simulate the real environment experienced by the self-heating device in the space, and the defects of the product which can be exposed by the composite load cannot be exposed; compared with the traditional single-load environmental assessment, the simulation of the composite environmental load is more complex, and the environment experienced by the self-heating device is simulated more truly. Taking the injection motion of the lunar orbit in the service process of the self-heating device as an example, the method relates to the temperature of the lunar orbit, the impact of a detector (containing the self-heating device) in the injection process, and the static force and vibration process in the process of landing the lunar surface. Under the action of temperature, vibration, impact, static load and temperature load, the mechanical property of the product is changed, the static load is superposed, and under the action of the impact and vibration load, the product shows the response characteristic different from that under the action of any single load.
2. The test criteria and methods are not established, and no relevant standard for currently guiding the development of the test exists. The current self-heating device comprehensive environment test task is not formed into an effective test method, a standard and a standard, and the development of a test cannot be guided. The determination of the loading sequence of the test load (different loading sequences such as thermal-vibration and vibration-thermal, and different performance influences on the product) and the evaluation of the related test and the like are all needed to be carried out.
Therefore, it is urgently needed to develop an environmental test apparatus and a test method for a self-heating apparatus to solve the above problems.
Disclosure of Invention
In order to solve the problems of the background art, the invention provides an environment testing device and a testing method for a self-heating device.
In order to achieve the purpose, the invention provides the following technical scheme:
an environmental test apparatus for self-heating apparatus, comprising:
the impact test unit is used for simulating an impact environment applied to the self-heating device;
the temperature test unit is used for simulating the temperature environment of the self-heating device;
the static test unit is used for simulating the static environment of the self-heating device;
the vibration test unit is used for simulating the vibration environment of the self-heating device;
an integrated control unit; the control signal output end of the integrated control unit is respectively connected with the control signal input end of the impact test unit, the control signal input end of the temperature test unit, the control signal input end of the static test unit and the control signal input end of the vibration test unit;
vibrating the sliding table top; the test piece and the temperature test unit are both arranged on the table top of the vibration sliding table; the test piece is arranged in the temperature test unit; the acting part of the static test unit passes through the temperature test unit and acts on the test piece; the impact test unit acts on the first end of vibration slip table mesa, and the vibration test unit acts on the second end of vibration slip table mesa.
The environment test device further comprises a test base, and the vibration sliding table top is arranged on the test base; the impact test unit includes:
a rotary actuator;
a rotating shaft; the power output end of the rotary actuator is connected with the rotating shaft;
a pendulum bob; the rotating shaft is connected with the upper part of the pendulum bob;
hammering and blocking; the pendulum bob hitting block is arranged at the first end of the table top of the vibration sliding table;
a baffle plate; the baffle is arranged at the first end of the test base;
a cushion layer lifting table; the cushion layer lifting platform is arranged on the baffle; the control signal output end of the integrated control unit is respectively connected with the control signal input end of the rotary actuator and the control signal input end of the cushion layer lifting platform;
impacting the cushion layer; the impact cushion layer is arranged on the table top of the cushion layer lifting table and is used for moving up and down along with the work of the cushion layer lifting table; when the pendulum bob works, the impact cushion layer is arranged between the pendulum hammering block and the baffle.
Specifically, the vibration test unit includes:
a vibration table; the control signal output end of the integrated control unit is connected with the control signal input end of the vibration table;
a vibration table inner shaft; the mesa of shaking table internal shaft connection shaking table, the mesa of shaking table and the second end connection of shaking table mesa, the horizontal center pin of shaking table internal shaft and pendulum hammering beat the horizontal center pin collineation when the pendulum hammering beats the piece.
Specifically, the temperature test unit includes:
a temperature box; the inner wall of the temperature box is provided with a heating rod;
a temperature sensor; the temperature sensor is arranged in the temperature box, and the signal output end of the temperature sensor is connected with the signal input end of the integrated control unit;
a thermal insulation layer; the heat insulation layer is arranged on the inner wall of the temperature box;
a refrigeration plug; the refrigeration plug is embedded in the wall of the temperature box, and the first end of the refrigeration plug acts on the inside of the temperature box;
an electronic valve; the second end of the refrigeration plug is connected with the first end of the electronic valve; the control signal output end of the integrated control unit is respectively connected with the control signal input end of the heating rod and the control signal input end of the electronic valve;
a liquid nitrogen tank; and the second end of the electronic valve is connected with the liquid nitrogen tank.
Specifically, the temperature test unit further comprises a temperature box locking device and a test fixture, a first fixing groove and a second fixing groove are formed in the table top of the vibration sliding table, the temperature box is installed in the first fixing groove and locked on the table top of the vibration sliding table through the temperature box locking device, and the test piece is installed in the second fixing groove and locked on the table top of the vibration sliding table through the test fixture.
Specifically, the static test unit comprises a static loading motor, a static loading head and a static loading rod; the static loading motor is arranged outside the temperature box, the static loading rod can slidably penetrate through the wall of the temperature box, the output end of the static loading motor is connected with the first end of the static loading rod, the second end of the static loading rod is connected with the static loading head, and the static loading head acts on the test piece; and a control signal output end of the integrated control unit is connected with a control signal input end of the static loading motor.
Specifically, the environment test device further comprises a strain sensor for deformation of the test piece and an acceleration sensor for acceleration measurement of the test piece, wherein the strain sensor and the acceleration sensor are both arranged on the surface of the test piece.
A testing method for an environmental testing apparatus for self-heating apparatus, comprising:
s1, preparation of early stage of test
a. Determining a test project, and making an outline and a safety strategy: according to the type characteristics of the tasks to be participated in by the self-heating device, analyzing the environmental load possibly encountered in the service life, carrying out theoretical calculation, establishing relevant models of impact, vibration, temperature and static load, forming a test input file by adopting a coating mode, and determining the requirements of the test purpose, the items, the types, the quantity and the duration time required to be developed by the test; compiling a test outline according to the test requirements and making a corresponding safety strategy;
b. designing and checking a test fixture, and carrying out test design; according to the requirements of test input files and outlines, designing and processing a test fixture, selecting the types of the devices to be tested according to test conditions, and configuring related auxiliary test instruments;
c. preparing a sensor: detecting and measuring temperature, deformation and acceleration parameters in the test process, and purchasing a corresponding number of temperature sensors, strain sensors and acceleration sensors according to test requirements;
s2, examination before test
a. The test pieces are sleeved in a neat manner, and initial detection is carried out: before testing, checking the product quality certificate or other certification documents of the test piece, and recording the checking result;
b. examination and joint test each test apparatus: checking the conditions of a test loading and control system and a sensor testing system, and determining that the working state of related equipment is normal;
c. checking a crane and a lifting appliance: test hoisting tools such as a crane and a hoisting rope are checked, and the conditions including the state of the hoisting tool and the weight of an object to be hoisted ensure that the test requirements are met;
d. laboratory related facilities examination: environmental measures such as laboratory fire protection, electric power protection and personnel security access are checked, and relevant facilities of a laboratory are confirmed to meet test requirements;
s3, product installation test assembly
a. The test piece is operated to the table top of the vibration sliding table, is arranged at a corresponding position, and is assembled with the test fixture according to requirements;
b. installing a temperature sensor, a strain sensor and an acceleration sensor, and connecting the integrated control unit;
s4 test assembly
The installation of the test piece is completed according to the requirements of the test outline, and the personnel are evacuated after the test site is checked to be correct;
s5, official test
a. Setting parameters: starting each experimental device of impact, vibration, temperature and static force according to the test requirements, carrying out system association in the integrated control unit, and inputting the test type, the test sequence and the test duration;
b. loading a load: carrying out load loading, load maintaining and load change actions;
c. load unloading: when the test load loading meets the requirements of the test input file and the test outline, the load is unloaded;
s6, test disassembly and assembly
After the load is unloaded, the load loading is closed; checking test data, checking whether the state of the test piece is damaged or not after the test piece is recovered, and recording the test field condition; and after the data and the field state are confirmed, the test piece and each sensor are dismantled, and the test is finished.
Compared with the prior art, the invention has the beneficial effects that:
the method can be used for simulating the temperature-vibration-impact-static force four-comprehensive load cooperative loading test device of the self-heating device in the whole process environment from ground emission to deep space detection, and compared with the traditional technology, the test device is more complex and relates to a load cooperative loading method and mutual coupling between loading devices;
this application uses vibration slip table mesa as the basis, and integrated design temperature, quiet power loading test device has realized the cooperation loading of vibration, temperature, quiet power loading load. Meanwhile, by utilizing the design of the vibration sliding table top and the pendulum hammer beating block, the moving direction of the vibration sliding table top generated when the pendulum hammer beating block beats the vibration sliding table top and the vibration direction of the vibration table are in the same horizontal position, and by utilizing the design of a stop block, limiting and the like, the cooperative loading of the impact load and the vibration load is realized, and finally the four comprehensive loading of vibration, temperature, static force and impact load can be realized;
according to the method, the load loading test flow is formulated according to the load types encountered in the use process of the self-heating device, and the test steps and the operation of the related composite environment test of the space detector type test piece can be standardized by formulating the load environment and the test flow encountered in the use process of the self-heating device, so that the technical support is provided for the standardized development and the standardized research of the related test.
Drawings
FIG. 1 is a schematic diagram of the movement of a self-heating device in a month detection process;
FIG. 2 is a schematic diagram of environmental load distribution during a lunar exploration process of a self-heating device product;
FIG. 3 is a schematic view of the construction of the environmental test apparatus for self-heating apparatus of the present application;
fig. 4 is a schematic structural diagram of a first fixing groove and a second fixing groove in the present application;
FIG. 5 is a flow chart of a method of testing the environmental test apparatus for self-heating apparatus of the present application;
labeled as:
1-a rotating shaft; 2-a pendulum bob; 3-hammering and blocking by swinging; 4-impact cushion layer; 5-a cushion layer lifting platform; 6-a baffle plate; 7-a test base; 8-temperature box; 9-a static loading motor; 10-a static loading head; 11-test piece; 12-a thermally insulating layer; 13-vibrating the slipway deck; 14-a centralized controller; 15-a refrigeration plug; 16-an electronic valve; 17-liquid nitrogen tank; 18-a vibration table; 19-temperature box locking device; 20-oscillating table inner shaft; 21-a first fixation groove; 22-second fixation groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention provides the following technical scheme:
as shown in fig. 3, an environmental test apparatus for a self-heating apparatus, comprising:
the impact test unit is used for simulating an environment of the self-heating device under impact;
the temperature test unit is used for simulating the temperature environment of the self-heating device;
the static test unit is used for simulating the static environment of the self-heating device;
the vibration test unit is used for simulating the vibration environment of the self-heating device;
an integrated control unit; the control signal output end of the integrated control unit is respectively connected with the control signal input end of the impact test unit, the control signal input end of the temperature test unit, the control signal input end of the static test unit and the control signal input end of the vibration test unit;
a vibration sliding table top 13; the test piece 11 and the temperature test unit are both arranged on the vibration sliding table top 13; the test piece 11 is arranged in the temperature test unit; the acting part of the static test unit passes through the temperature test unit and acts on the test piece 11; the impact test unit acts on the first end of vibration slip table mesa 13, and the vibration test unit acts on the second end of vibration slip table mesa 13.
As shown in fig. 3, the environment test device further comprises a test base 7, and a vibration sliding table top 13 is installed on the test base 7; the impact test unit includes:
a rotary actuator;
a rotating shaft 1; the power output end of the rotary actuator is connected with the rotating shaft 1;
a pendulum bob 2; the rotating shaft 1 is connected with the upper part of the pendulum bob 2;
hammering the block 3; the pendulum hammering block 3 is arranged on the first end of the vibration sliding table surface 13;
a baffle 6; the baffle 6 is arranged on the first end of the test base 7;
a cushion layer lifting table 5; the cushion layer lifting platform 5 is arranged on the baffle 6; the control signal output end of the integrated control unit is respectively connected with the control signal input end of the rotary actuator and the control signal input end of the cushion lifting platform 5;
an impact cushion layer 4; the impact cushion layer 4 is arranged on the table top of the cushion layer lifting table 5 and is used for moving up and down along with the work of the cushion layer lifting table 5; when the pendulum bob 2 works, the impact cushion layer 4 is arranged between the pendulum hammering beating block 3 and the baffle 6.
In this embodiment, during the test, the integrated control unit (integrated controller 14) sends out a command to instruct the rotary actuator to move, the pendulum bob 2 is rotated to the height required by the test through the rotating shaft 1, and the pendulum bob 2 is locked through a locking mechanism, so that the position of the pendulum bob 2 is fixed. After cushion elevating platform 5 will strike 4 lifts to relevant position in cushion, locking mechanism unblock, pendulum 2 free fall hits pendulum and hits piece 3, and pendulum hits piece 3 and welds in the 13 marginal extended positions of vibration slip table mesa. At this time, the impact force of the falling pendulum bob 2 is transmitted to the vibration sliding table top 13 through the pendulum bob impact block 3 and transmitted to the test piece 11 through the test fixture fixed on the vibration sliding table top, and the impact test is completed. Because the loading of the impact load is related to the impact cushion layer 4, different impact loading spectrums can be formed by replacing the related impact cushion layer 4, and the impact test is completed. Because 6 limiting displacement's of baffle existence, the gliding distance of vibration slip table mesa 13 can not surpass the distance of stretching out test base 7, and this application sets up the distance that vibration slip table mesa 13 stretches out test base 7 and is 10mm, when satisfying impact test, also satisfies the 18 displacement requirements of shaking table of vibration slip table mesa 13 another side. Since the impact action generally occurs during launch or aircraft separation, attitude adjustment, etc., it is performed less frequently during the life cycle and can be done during vibration test intervals.
As shown in fig. 3, the vibration testing unit includes:
a vibration table 18; the control signal output end of the integrated control unit is connected with the control signal input end of the vibration table 18;
a vibration table inner shaft 20; the mesa of shaking table 18 is connected to shaking table inside shaft 20, and the mesa of shaking table 18 is connected with the second end of vibration slip table mesa 13, and the horizontal center pin of shaking table inside shaft 20 and pendulum 2 hit the horizontal center pin collineation when the pendulum hits piece 3.
In this embodiment, during operation, the inner shaft 20 of the vibration table rotates to push the table top of the vibration table 18 to move, and further push the table top of the vibration table 18 to move, and the test piece 11 is fixed on the table top 13 of the vibration table by mounting bolts and the like through a test fixture, so as to realize the loading of the vibration load.
During the design, the horizontal center pin of the inside axle 20 of shaking table and the horizontal center pin collineation when pendulum 2 hits the pendulum and hits piece 3, because shaking table 18 can realize displacement about 260mm, 6 limit function of stack baffle, can realize strikeing the collaborative work who hits and shaking table 18.
As shown in fig. 3, the temperature test unit includes:
a temperature box 8; the inner wall of the temperature box 8 is provided with a heating rod;
a temperature sensor; the temperature sensor is arranged in the temperature box 8, and the signal output end of the temperature sensor is connected with the signal input end of the integrated control unit;
a heat insulating layer 12; the heat insulation layer 12 is arranged on the inner wall of the temperature box 8;
a refrigeration plug 15; the refrigeration plug 15 is embedded in the wall of the temperature box 8, and the first end of the refrigeration plug 15 acts on the inside of the temperature box 8;
an electronic valve 16; the second end of the refrigeration plug 15 is connected with the first end of the electronic valve 16; the control signal output end of the integrated control unit is respectively connected with the control signal input end of the heating rod and the control signal input end of the electronic valve 16;
a liquid nitrogen tank 17; the second end of the electronic valve 16 is connected to a liquid nitrogen tank 17.
In this embodiment, during the test, the real-time temperature in the temperature box 8 is collected by the temperature sensor, and compared with the temperature set value in the integrated control unit, the voltage loaded by the temperature is adjusted according to the temperature deviation, the loading power of the heating rod in the temperature test box is adjusted, and the heating control of the temperature is realized. The heat insulation layer 12 made of refractory fiber materials is arranged around the temperature box 8, so that the temperature can be isolated from being transferred and diffused outwards, and the temperature heating efficiency is improved. When a low-temperature test is required, the electronic valve 16 is opened, and liquid nitrogen in the liquid nitrogen tank 17 is transferred to the inside of the temperature box 8 through the electronic valve 16 and the refrigeration plug 15 to be cooled. The middle pipeline is built through a flexible hose and does not interfere with vibration and impact tests. The temperature box 8 is mounted on the vibration sliding table top 13 through the temperature box locking device 19, and the temperature box 8 vibrates along with the vibration test or the impact test, so that the temperature box 8 is designed to be miniaturized according to the size of the self-heating device and is reinforced by reinforcing steel bars and bolts at relevant parts during the design.
As shown in fig. 3 and 4, the temperature test unit further includes a temperature box locking device 19 and a test fixture, a first fixing groove 21 and a second fixing groove 22 are opened on the vibration slide table top 13, the temperature box 8 is installed in the first fixing groove 21 and locked on the vibration slide table top 13 through the temperature box locking device 19, and the test piece 11 is installed in the second fixing groove 22 and locked on the vibration slide table top 13 through the test fixture.
The vibration sliding table top 13 is made of reinforced steel and is placed on the stainless steel solid test base 7. Be provided with the connecting bolt hole on the vibration slip table mesa 13, the test piece 11 is placed on test fixture, and test fixture passes through bolted connection to vibration slip table mesa 13, accomplishes the installation of test piece 11 product.
As shown in fig. 3, the static test unit comprises a static loading motor, a static loading head 10 and a static loading rod; the static loading motor is arranged outside the temperature box 8, the static loading rod can slidably penetrate through the wall of the temperature box 8, the output end of the static loading motor is connected with the first end of the static loading rod, the second end of the static loading rod is connected with the static loading head 10, and the static loading head 10 acts on a test piece 11; and a control signal output end of the integrated control unit is connected with a control signal input end of the static loading motor.
In this embodiment, the static loading motor is installed and fixed at the top position of the temperature box 8, the static loading motor penetrates into the static loading rod through punching, the static loading head 10 is connected to the surface position of the test piece 11, and during testing, the integrated controller 14 sends out a static loading instruction to apply static force to the test piece 11. When the test system works, a test fixture needs to be arranged, after the static loading index reaches a set value, the position of the static loading head 10 is locked, and the test system and the vibration and impact tests run synchronously in the process of the composite environment test. The static loading head 10 can be supported by metal, the static loading rod is supported by corundum and the like, and the corundum material is a good heat-resistant material and has good heat resistance, so that heat in the temperature box 8 can be prevented from being transferred outwards, and the normal work of the static loading motor is protected.
Specifically, the environment test device further comprises a strain sensor for deformation of the test piece and an acceleration sensor for acceleration measurement of the test piece, wherein the strain sensor and the acceleration sensor are both arranged on the surface of the test piece.
As shown in fig. 5, a test method for an environmental test apparatus for a self-heating apparatus, comprising:
s1, preparation of early stage of test
a. Determining a test project, and making an outline and a safety strategy: according to the type characteristics of the tasks to be participated in by the self-heating device, analyzing the environmental load possibly encountered in the service life, carrying out theoretical calculation, establishing relevant models of impact, vibration, temperature and static load, forming a test input file by adopting a coating mode, and determining the requirements of the test purpose, the items, the types, the quantity and the duration time required to be developed by the test; compiling a test outline according to the test requirements and making a corresponding safety strategy;
b. designing and checking a test fixture, and carrying out test design; according to the requirements of test input files and outlines, designing and processing a test fixture, selecting the types of the devices to be tested according to test conditions, and configuring related auxiliary test instruments;
c. preparing a sensor: detecting and measuring temperature, deformation and acceleration parameters in the test process, and purchasing corresponding quantity of temperature sensors, strain sensors and acceleration sensors according to test requirements;
s2, examination before test
a. The test pieces 11 are sleeved in a complete manner, and the initial detection is as follows: before testing, checking the product quality certificate or other certification documents of the test piece 11, and recording the checking result;
b. examination and joint test each test apparatus: checking the conditions of a test loading and control system and a sensor testing system, and determining that the working state of related equipment is normal;
c. checking a crane and a lifting appliance: test hoisting tools such as a crane and a hoisting rope are checked, and the conditions including the state of the hoisting tool and the weight of an object to be hoisted ensure that the test requirements are met;
d. laboratory related facilities examination: environmental measures such as laboratory fire protection, electric power protection and personnel security access are checked, and relevant facilities of a laboratory are confirmed to meet test requirements;
s3, product installation test assembly
a. The test piece 11 is operated to the table top 13 of the vibration sliding table, the test piece is installed at a corresponding position, and the test piece 11 and the test fixture are assembled together as required;
b. installing a temperature sensor, a strain sensor and an acceleration sensor, and connecting the integrated control unit;
s4 test assembly
The installation of the test piece 11 is completed according to the requirements of the test outline, and after the test site is checked to be correct, the personnel are evacuated;
s5, official test
a. Setting parameters: starting each experimental device of impact, vibration, temperature and static force according to the test requirements, carrying out system association in the integrated control unit, and inputting the test type, the test sequence and the test duration;
b. loading a load: carrying out load loading, load maintaining and load change actions;
c. load unloading: when the test load loading meets the requirements of the test input file and the test outline, the load is unloaded;
s6, test disassembly and assembly
After the load is unloaded, the load loading is closed; checking test data, checking whether the state of the test piece 11 is damaged or not after the test piece 11 is recovered, and recording the test field condition; and after the data and the field state are confirmed, the test piece 11 and each sensor are dismantled, and the test is finished.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. An environmental test apparatus for a self-heating apparatus, comprising:
the impact test unit is used for simulating an environment of the self-heating device under impact;
the temperature test unit is used for simulating the temperature environment of the self-heating device;
the static test unit is used for simulating the static environment of the self-heating device;
the vibration test unit is used for simulating the vibration environment of the self-heating device; the vibration test unit comprises a vibration table and a vibration table inner shaft; the control signal output end of the integrated control unit is connected with the control signal input end of the vibration table; the inner shaft of the vibration table is connected with the table top of the vibration table, the table top of the vibration table is connected with the second end of the table top of the vibration table, and the transverse central shaft of the inner shaft of the vibration table and the transverse central shaft of the pendulum hammering block beating are collinear
An integrated control unit; the control signal output end of the integrated control unit is respectively connected with the control signal input end of the impact test unit, the control signal input end of the temperature test unit, the control signal input end of the static test unit and the control signal input end of the vibration test unit;
vibrating the sliding table top; the test piece and the temperature test unit are both arranged on the table top of the vibration sliding table; the test piece is arranged in the temperature test unit; the acting part of the static test unit passes through the temperature test unit and acts on the test piece; the impact test unit acts on a first end of the vibration sliding table top, and the vibration test unit acts on a second end of the vibration sliding table top;
a test base; the table top of the vibration sliding table is arranged on the test base; the impact test unit includes:
a rotary actuator;
a rotating shaft; the power output end of the rotary actuator is connected with the rotating shaft;
a pendulum bob; the rotating shaft is connected with the upper part of the pendulum bob;
hammering and blocking; the pendulum bob beating block is arranged on the first end of the vibration sliding table top;
a baffle plate; the baffle is arranged at the first end of the test base;
a cushion layer lifting table; the cushion layer lifting platform is arranged on the baffle; the control signal output end of the integrated control unit is respectively connected with the control signal input end of the rotary actuator and the control signal input end of the cushion layer lifting platform;
impacting the cushion layer; the impact cushion layer is arranged on the table top of the cushion layer lifting table and is used for moving up and down along with the work of the cushion layer lifting table; when the pendulum bob works, the impact cushion layer is arranged between the pendulum hammering block and the baffle.
2. The environmental test apparatus for a self-heating apparatus according to claim 1, wherein the temperature test unit comprises:
a temperature box; the inner wall of the temperature box is provided with a heating rod;
a temperature sensor; the temperature sensor is arranged in the temperature box, and the signal output end of the temperature sensor is connected with the signal input end of the integrated control unit;
a thermal insulation layer; the heat insulation layer is arranged on the inner wall of the temperature box;
a refrigeration plug; the refrigeration plug is embedded in the wall of the temperature box, and the first end of the refrigeration plug acts on the inside of the temperature box;
an electronic valve; the second end of the refrigeration plug is connected with the first end of the electronic valve; the control signal output end of the integrated control unit is respectively connected with the control signal input end of the heating rod and the control signal input end of the electronic valve;
a liquid nitrogen tank; and the second end of the electronic valve is connected with the liquid nitrogen tank.
3. The environmental test device for the self-heating device according to claim 2, wherein the temperature test unit further comprises a temperature box locking device and a test fixture, a first fixing groove and a second fixing groove are formed on the table top of the vibration sliding table, the temperature box is installed in the first fixing groove and locked on the table top of the vibration sliding table through the temperature box locking device, and the test piece is installed in the second fixing groove and locked on the table top of the vibration sliding table through the test fixture.
4. The environmental test device for the self-heating device according to claim 1, wherein the static test unit comprises a static loading motor, a static loading head, a static loading rod; the static loading motor is arranged outside the temperature box, the static loading rod can slidably penetrate through the wall of the temperature box, the output end of the static loading motor is connected with the first end of the static loading rod, the second end of the static loading rod is connected with the static loading head, and the static loading head acts on the test piece; and a control signal output end of the integrated control unit is connected with a control signal input end of the static loading motor.
5. The environmental test device for the self-heating device according to claim 1, further comprising a strain sensor for deformation of the test piece, an acceleration sensor for acceleration measurement of the test piece, wherein the strain sensor and the acceleration sensor are mounted on the surface of the test piece.
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