CN111208255A - Visual high-pressure burning rate instrument and method for multiple solid propellant drug strips - Google Patents
Visual high-pressure burning rate instrument and method for multiple solid propellant drug strips Download PDFInfo
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- CN111208255A CN111208255A CN202010110516.7A CN202010110516A CN111208255A CN 111208255 A CN111208255 A CN 111208255A CN 202010110516 A CN202010110516 A CN 202010110516A CN 111208255 A CN111208255 A CN 111208255A
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Abstract
The invention discloses a visual high-pressure burning rate instrument and method for a plurality of solid propellant drug strips, and belongs to the field of propellant testing. The high-pressure combustion chamber comprises a high-pressure combustion chamber body, a medicine strip tray rotating module, a combustion chamber air charging and exhausting module and a measurement and control data acquisition module. The invention realizes the position conversion of the propellant powder strips and the closing of the control test circuit through the rotation of the turntable, realizes the measurement of a plurality of propellant powder columns under one-time pressurization without replacing the propellant powder strips and a dismounting device, realizes the modularized installation of the propellant powder strips and the target lines outside the visual high-pressure burning rate instrument through the integrated design of the propellant tray and the target line frame, realizes the circuit conduction without the line installation in the limited space of the burning rate instrument, simplifies the test flow, improves the test efficiency and the operability, and is convenient for the measurement of the plurality of propellant powder columns under one-time pressurization. The invention can also meet the requirements of dynamic pressure regulation and visual real-time measurement. The invention has the advantages of high efficiency, high reliability, low cost, strong operability and the like.
Description
Technical Field
The invention relates to a visual high-pressure burning rate instrument and method for a plurality of solid propellant drug strips, and belongs to the field of propellant testing.
Background
The burning rate of the propellant is the distance of the propellant moving along the normal direction of the surface of the propellant per unit time. The burning speed of the propellant reflects the energy release rate of the propellant, and the burning speed can be changed due to the change of parameters such as pressure, temperature, ventilation area and the like in the combustion chamber. Parameters of the combustion performance of the weighing propellant, such as the combustion speed pressure sensitive coefficient, the combustion speed temperature sensitive coefficient and the like, can be obtained only after the combustion speed is measured. The combustion speed change affects the working quality of the engine, and can affect the internal trajectory performance of the engine and the flight stability of the rocket. The target line method is characterized in that equidistant L target lines are inserted into propellant wrapped at the periphery, when the target lines are burnt out, a pulse signal is given to a data acquisition system, the time interval is delta t,
is the burning rate of the propellant.
At present, the burning rate of the solid propellant can be measured only by one grain at a time, and the loading and unloading are complex. Particularly, under the high-pressure environment with the pressure of 20MPa, waiting time is needed for once pressure relief, and certain waiting time is needed for re-installing the medicine strips after unloading to arrange the target lines, so that the process is complicated and complicated in the multi-group experiment process, the time consumption is long, the efficiency is low, the gas in the gas cylinder is wasted, and the time cost and the economic cost are increased. The invention can realize one-time pressurization and multi-group measurement, and saves waiting time in order to solve the problem of the current high-pressure combustion rate measurement.
Disclosure of Invention
The invention discloses a visual high-pressure burning rate instrument and a method for a plurality of solid propellant drug strips, which aim to solve the technical problems that: the rotary table rotates to realize position conversion of propellant powder strips and control of closing of a test circuit, the propellant powder strips and a dismounting device are not required to be replaced, measurement of a plurality of propellant powder columns of the propellant under one-time pressurization is realized, in addition, the propellant tray and the target wire rack are integrally designed to realize that the propellant powder strips and the target wires are modularly installed outside the visual high-pressure combustion speed instrument, namely, the circuit is conducted without circuit installation in a limited space of the combustion speed instrument, the test flow is simplified, the test efficiency and the operability are improved, the measurement of the plurality of propellant powder columns under one-time pressurization is further facilitated, and the dynamic pressure regulation and visual real-time measurement requirements can be met. The invention has the advantages of high efficiency, high reliability, low cost, strong operability and the like.
The purpose of the invention is realized by the following technical scheme.
The invention discloses a visual high-pressure combustion speed instrument and a visual high-pressure combustion speed method for a plurality of solid propellant drug strips.
The high-pressure combustion chamber body comprises a combustor, a visual window, a rotary dynamic seal, an upper end cover, a side end cover and a sealing ring. And a limiting hole for positioning a limiting mechanism of the medicine strip tray rotating module is processed on the high-pressure combustion chamber body.
The medicine strip tray rotating module comprises a medicine strip tray unit, a rotary table, a rotating main shaft and a limiting mechanism. The single drug strip tray unit is used for loading single propellant drug strips, and is provided with a fixed target line, a spring contact head and a spacing block.
The carousel is used for loading fixed medicine strip tray unit, the carousel is used for loading the fixing device quantity of fixed medicine strip tray unit and medicine strip tray unit quantity the same.
The end part of the rotating main shaft is provided with a rotating handle.
The rotating main shaft is driven to rotate through the rotating handle, the rotating main shaft drives the rotary table to rotate, the medicine strip tray unit is driven to rotate to a required test position through the rotary table, the test position of the medicine strip tray unit is converted, namely the test position of the propellant medicine strip is converted, and the limit hole of the high-pressure combustion chamber body is inserted through the limiting mechanism to limit the medicine strip tray rotating module.
Preferably, the turntable is used for loading and fixing the drug strip tray unit, the loading and fixing mode is that a boss or a groove used for fixed matching is respectively processed on the turntable and the drug strip tray body, in addition, the spring contact head is inserted into the groove used for matching with the spring contact head in the turntable, and the turntable and the drug strip tray unit are further fixed.
Preferably, the single drug strip tray unit comprises a drug strip tray body, a spacing piece, a spring contact head, a spacing piece fixing groove, a positioning stud, a target line frame, a target line positioning bolt, an ignition line positioning hole, a propellant drug strip, a target line frame threaded hole and a target line. The spacer is used for avoiding flame to jump and ignite other propellants when the propellant medicine strips are burnt in the test. The propellant medicine strip is fixed on the medicine strip tray body, and the positioning stud is used for further fixing the propellant medicine strip; the target line frame is positioned at the outer side of the propellant drug strip and fixed on the drug strip tray body, the target line frame fixes the target line through a target line positioning bolt, and the spring contact head is in circuit connection with the target line; the ignition wire positioning hole is used for fixing an ignition wire; the isolation of adjacent propellant medicine strips is realized to the spacer insertion spacing block fixed slot.
Preferably, the propellant tray and the target wire rack are integrally assembled to realize the modular assembly of the explosive strips and the target wire outside the visual high-voltage burning rate instrument, namely, the circuit is conducted without line installation in the limited space of the burning rate instrument, the test flow is simplified, the test efficiency and the operability are improved, the burning rate of a plurality of explosive propellant explosive strips is further conveniently measured under one-time pressurization, and the specific realization method comprises the following steps: the bottom end of the target wire rack is provided with threads which are matched with target wire rack threaded holes in the drug strip tray body to fix the target wire rack on two sides of propellant drug strips, and then target wires are fixed through target wire positioning bolts, so that the integrated modular assembly of the target wire rack and the drug strip tray is realized. The propellant medicine strip is placed in the middle of the medicine strip tray body and fixed by the positioning bolt. The target line and the propellant powder strip can be conveniently installed outside the burner, and the target line is prevented from being installed in the limited space of the burner.
Preferably, the rotating part seal comprises a bearing, a rectangular sealing ring, a V-shaped self-tightening sealing ring, a flange plate and a bolt. Because the rectangular sealing ring has a larger contact area on the cross section, and can bear higher pressure, the deformation of a relatively small area is smaller under the same pressure. The rotating main shaft can normally rotate as an inner side seal and an outer side bearing, and a gasket is used for playing a buffering role and protecting the bearing. The V-shaped self-tightening washer can be tightened by the action of gravity. The flange plate with the small step is fastened by adopting a stud to press the V-shaped self-tightening sealing ring, so that the sealing air tightness of the rotating part is ensured.
Preferably, the visualization window comprises an end cover and glass.
Preferably, the combustion chamber air charging and discharging module comprises a buffer air tank, a high-pressure nitrogen cylinder, an electric valve air charging and discharging pipeline, an exhaust valve, a pressure reducing valve and an air inlet valve. The electric valve is used for dynamically adjusting the pressure of the combustion chamber to maintain stable pressure, and when the pressure is higher than a preset value, the electric valve is opened to exhaust and reduce pressure.
Preferably, the measurement and control data acquisition module comprises a data acquisition and display recorder, a high-frequency dynamic pressure sensor, an ignition power supply, a wall-through connector and a contact unit.
Preferably, the data acquisition and display recorder is used for acquiring voltage records of target lines and displaying data, the ignition source is used for igniting and igniting the propellant, and the wall-through connector realizes communication of internal and external circuits of the combustion chamber under the sealed condition.
The contact unit comprises a rigid contact column, a contact head, a contact piece and a contact column fixedly connected with the combustion chamber, and the contact head and the contact piece form a contactor.
The contact unit is used for realizing the following functions: the contact unit is used for realizing the following functions: contact head compresses tightly contact piece circuit intercommunication during current test position, and experimental end rotates main shaft contact head and contact piece separating circuit disconnection, continues to rotate the rotation main shaft, and contact head and contact piece again contact after the medicine strip that awaits measuring gets into propellant medicine strip transform position's test area, and the circuit switch-on realizes the closed control of propellant medicine strip position conversion in-process circuit. The upper end of the contact column contains a spring contact head which is matched with a hole on the medicine strip tray rotating module to realize the communication of a circuit between the contact column and the turntable, namely, the conduction and the closing of a test circuit when the propellant medicine strip position is converted are realized through the matching of the contact unit and the medicine strip tray rotating module.
Preferably, in the contact unit, the rigid contact column includes: cylinder, spring contact, positioning bolt. The contact head includes: the device comprises a blocking head, a sliding block, a slideway, a spring and a lead. The contact sheet includes: an arc-shaped contact piece.
The contact head consists of a cylindrical shell and a sliding block arranged in the shell, wherein the front part of the sliding block is an arc surface, and the lower part of the sliding block is a cylinder. The slider can slide in the cylinder through lower part cylinder, and the slider passes through spring coupling with the barrel bottom, and the elastic coefficient of spring is difficult too big, and the intensity of spring satisfies the pressure-bearing requirement. The slider is connected with the cylinder through a wire, the wire is connected with the spring contact at the bottom of the contact column, and the length of the wire left in the cylinder is provided with enough allowance for preventing the slider from moving and breaking the wire. The outer ring of the upper part of the cylinder body is provided with a blocking ring for preventing the sliding block from flying out.
The contact piece is fixedly connected to the contact column body on the combustion chamber body through the screw, the surface of the contact piece forms a groove, a gap is reserved between the flat part and the front end of the contact head, and the gap is used for ensuring the stable connection of the contact head and the contact piece. The rigid contactor column where the contact head is located is fixedly connected with the turntable through threaded connection. The rigidity of the rigid contact column needs to ensure that the lateral deformation is not small enough to generate a gap for dislocation of the contact head and the contact piece when the rigid contact column is pressed.
The invention discloses a visual high-pressure burning rate instrument and a method for a plurality of solid propellant drug strips, which comprises the following steps:
the method comprises the following steps: through propellant tray and target line frame integrated assembly realize propellant medicine strip and target line at the outside modularization installation of visual high pressure burning rate appearance, realize promptly that the circuit switches on and need not to carry out the circuit installation in burning rate appearance finite space, simplify experimental flow, improve test efficiency and maneuverability, further make things convenient for the measurement to many medicine propellant columns under the pressurization.
The integrated assembly realization method of the propellant tray and the target wire rack comprises the following steps: the middle part of the medicine strip tray body contains a round hole for placing the medicine strips, the propellant medicine strips are placed into the medicine strip tray body, and the positioning bolts are screwed down. The bottom end of the target wire rack is provided with threads matched with a target wire rack threaded hole in the drug strip tray body to fix the target wire rack on two sides of a propellant drug strip, the target wire is fixed through a target wire positioning bolt, an electric heating wire is fixed through a positioning hole in a target wire column, the target wire and the ignition wire share one low-level ground wire, the target wire column and a contactor column change the number of the target wires and the number of specific structural units according to the number of electric signals required to be measured by the propellant drug strip, and the integrated modular assembly of the target wire rack and the drug strip tray is realized.
Step two: put into the drug strip tray unit.
The isolating pieces are inserted into the drug strip tray units, the side door is opened on the right side of the combustion chamber body and is sealed by the sealing ring and the end cover, and the screws are connected with the combustion chamber body and used for placing the drug strip tray units. Open combustion chamber side end cover, lay the medicine strip tray unit in carousel tray hole, realize carousel and medicine strip tray body fixed Assembly through square groove and boss cooperation on carousel and medicine strip tray body, the spring contact head on the medicine strip tray unit communicates with the hole on the carousel, realizes that circuit intercommunication between medicine strip tray unit and the carousel. The rotating main shaft penetrates through the upper end cover to perform dynamic sealing treatment to realize the rotation of the device in a sealed environment, and meanwhile, bearings are arranged on two sides of the main shaft to realize the rotation of the main shaft and play a role in positioning to ensure the stability of the rotation. And closing the side end cover, rotating the rotating main shaft by rotating the handle, ensuring that the to-be-tested medicine strip enters a test area when the limiting hole on the handle is superposed with the positioning hole on the combustion chamber body, contacting the contact head in the contactor with the contact piece, switching on a circuit, and inserting the positioning pin.
Step three: the charging, discharging and pressure measuring are realized through the combustion chamber charging and discharging module. Open high-pressure nitrogen bottle air valve and supply gas, observe the pressure value through the display screen, supply gas for the combustion chamber through high-pressure nitrogen bottle, in order to prevent that propellant medicine strip receives big air current impact when admitting air and needs the air inlet to be located the carousel downside, place sensor and dynamic control valve in the casing right side. The dynamic pressure sensor is adopted to measure the pressure intensity in the combustor in real time, the control valve exhausts air into the buffer bottle when the pressure intensity is higher than a steady state value, and air is fed into the combustor through the high-pressure nitrogen bottle when the pressure intensity is lower than the steady state value to maintain the quasi-balance of the pressure intensity and reach a preset value, so that the accuracy of a measuring result is ensured. The combustor is additionally provided with an exhaust outlet to ensure that waste gas is smoothly discharged.
Step four: and (4) igniting the first propellant powder strip, and acquiring and observing data.
And (3) turning on an ignition power supply, burning the propellant strips to be tested at the current position, isolating the test propellant strips from the adjacent propellant strips to be tested by adopting the isolating pieces, and avoiding flame propagation to ignite the propellant to be tested by adopting the isolating pieces to isolate different propellant strips. The propellant powder strip combustion process is observed through a visual window of the high-pressure combustion chamber body, data collection is carried out through the measurement and control data collection module, the propellant combustion surface is pushed to the target line to blow the target line, electric pulse signals are generated, and the target line voltage and the electric pulse signals are collected and recorded through the multi-channel data collection card and the display recorder. The display recorder displays the pressure change in the combustion chamber in real time. The ratio of the distance L of the combustion surface to the time difference t of the electric pulse signal is the combustion speed of the propellant powder strip under the pressure. And measuring the real-time pressure in the combustion chamber through a high-frequency dynamic pressure sensor.
Step five: and rotating the medicine strip tray unit to the next test position, inflating, exhausting and measuring pressure, and performing ignition, data acquisition and observation on the propellant medicine strips after the position conversion.
After the test of the single medicine strip at the previous position is finished, the hand wheel is slowly rotated to prevent the propellant from deforming or the target line from being pulled apart due to sudden overload. The rotating main shaft is driven to rotate by rotating the handle, the rotating main shaft drives the turntable to rotate, the contact head of the main shaft and the contact piece separation circuit are disconnected, the test position of the drug strip tray unit is converted by driving the drug strip tray unit to rotate to the required test position through the turntable, namely, the conversion of the test mechanical position space of the propellant drug strip is realized, in addition, the communication of the circuit between the contact column and the turntable is realized through the matching of the spring contact head arranged at the upper end of the contact column and the hole on the drug strip tray rotating module, namely, the contact unit is matched with the drug strip tray rotating module to realize the conduction and the closing of the test circuit when the propellant drug strip position is converted, the conversion of the propellant drug strip test circuit relation is realized, when the propellant medicine strip to be tested enters the test area of the propellant medicine strip conversion position, the contact head is contacted with the contact piece again, the test circuit is connected, and the circuit closing control in the propellant medicine strip position conversion process is realized. The limiting mechanism is inserted into the limiting hole of the high-pressure combustion chamber body to limit the medicine strip tray rotating module. And (4) inflating, exhausting and measuring pressure according to the third step, igniting the propellant medicine strip after the position conversion, acquiring data and observing the data according to the fourth step until the propellant medicine strip test at the current position is finished.
Step six: and repeating the fifth step according to test requirements, igniting the propellant drug strips after the position conversion, acquiring data and observing the data until all the propellant drug strips are tested, realizing mechanical space position conversion and control test circuit relation conversion of the propellant drug strips by rotating the turntable in the fifth step, realizing measurement of a plurality of propellant drug columns under one-time pressurization without replacing the propellant drug strips and a dismounting device, further saving the time required by an inflating and loading and unloading device, simplifying the test flow and improving the test efficiency and operability.
After the test is finished, the end cover is opened to clean the visual high-pressure burning rate instrument.
Has the advantages that:
1. the invention discloses a visual high-pressure burning rate instrument and method for a plurality of solid propellant drug strips, which are used for realizing mechanical space position conversion and control test circuit relation conversion of the propellant drug strips, do not need to replace the propellant drug strips and a dismounting device, realize the burning rate measurement of a plurality of propellant drug columns under one-time pressurization, further save the time required by an inflating and loading and unloading device, simplify the test flow, improve the test efficiency and operability and reduce the cost.
2. The invention discloses a visual high-pressure burning rate instrument and a method for a plurality of solid propellant drug strips.
3. The invention discloses a visual high-pressure burning rate instrument and a visual high-pressure burning rate method for a plurality of solid propellant drug strips.
4. The invention discloses a visual high-pressure burning rate instrument and a visual high-pressure burning rate method for a plurality of solid propellant drug strips.
5. The invention discloses a visual high-pressure combustion speed instrument and a visual high-pressure combustion speed method for a plurality of solid propellant drug strips, which realize dynamic regulation of pressure intensity in a combustion chamber through linkage of a pressure sensor and an electric valve.
6. The invention discloses a visual high-pressure burning rate instrument and a visual high-pressure burning rate method for a plurality of solid propellant drug strips.
Drawings
FIG. 1 is a schematic view of a visual high pressure combustion rate apparatus and method for multiple solid propellant sticks of the present invention;
FIG. 2 is a system composition and functional diagram of a visual high pressure combustion rate apparatus and method for multiple solid propellant sticks of the present invention;
FIG. 3 is a high pressure combustor body;
FIG. 4 is a drug strip tray rotation module;
FIG. 5 is a schematic view of a carousel layout;
fig. 6-a is a front view of the drug strip tray unit, and fig. 6-b is a top view of the drug strip tray unit;
FIG. 7-a front view of the drug strip tray unit and carousel loading, and FIG. 7-b top view of the drug strip tray unit and carousel loading;
FIG. 8 is a combustion chamber charge and exhaust module;
FIG. 9 is a measurement and control data acquisition module;
fig. 10 is a contact unit;
fig. 11 is a flowchart of the experiment.
Wherein: 1-high pressure combustion chamber body, 2-drug strip tray rotating module, 3-combustion chamber charging and exhausting module, 4-measurement and control data acquisition module, 1.1-combustor, 1.2-visual window, 1.3-rotating position dynamic seal, 1.4-upper end cover, 1.5-side end cover, 1.6-sealing ring, 1.7-supporting bearing, 1.2.1-end cover, 1.2.2-glass, 1.3.1-bearing, 1.3.2-rectangular sealing ring, 1.3.3-V-shaped self-tightening sealing ring, 1.3.4-flange, 1.3.5-bolt, 2.1-drug strip tray unit, 2.2-rotary table, 2.3-rotating main shaft, 2.4-limiting mechanism, 2.1.1-drug strip tray body, 2.1.2-isolating sheet, 2.1.3-spring contact head, 2.1.4-isolating sheet, 2.1.5-locating wire frame, 2.1.1-drug strip tray body, 2.1-locating wire frame, 2.7-locating wire, 2.3-locating hole, 3619.3-locating wire frame, 3632-locating wire, target wire, 3632-locating wire, 367.3.3-locating wire, etc 2.2.1-contact hole, 2.2.2-drug strip tray unit hole, 2.2.3-rotating spindle hole, 2.2.4-limit boss, 3.1-buffer gas tank, 3.2-high pressure nitrogen gas bottle, 3.3-electric valve, 3.4-exhaust valve, 3.5-pressure reducing valve, 3.6-air inlet valve, 3.7-high pressure nitrogen gas bottle valve, 4.1-data acquisition and display recorder, 4.2-high frequency dynamic pressure sensor, 4.3-ignition power supply, 4.4-wall joint, 4.5-contact unit, 4.5.1-rigid contact column, 4.5.2-contact head, 4.5.3-contact piece, 4.5.4-contact column fixed with combustion chamber, 4.5.1.1-contact column, 4.5.1.2-spring contact, 4.5.1.3-positioning bolt, 4.5.2.1-blocking head, 4.5.2.2-slide block, 392-3875-spring, 4.5.2.5-guide line.
Detailed Description
For a better understanding of the objects and advantages of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Example 1:
as shown in fig. 1, the visual high-pressure combustion speed instrument for measuring the combustion speed of a plurality of solid propellant drug strips disclosed in the embodiment comprises a high-pressure combustion chamber body 1, a drug strip tray rotating module 2, a combustion chamber charging and discharging module 3 and a measurement and control data acquisition module 4.
Fig. 2 is a functional diagram of system composition, a high-pressure combustion chamber body 1 provides a test site, the position conversion of propellant drug strips is realized through a drug strip tray rotating module 2, the dynamic stability and the real-time control of the pressure intensity in the combustion chamber are realized through an air charging and discharging module 3, and the combustion speed and the real-time pressure intensity of the combustion chamber are measured through a measurement and control data acquisition module 4.
As shown in fig. 3, the high-pressure combustion chamber body 1 includes a combustor 1.1, a visual window 1.2, a rotary dynamic seal 1.3, an upper end cap 1.4, a side end cap 1.5, a seal ring 1.6, and a support bearing 1.7. The visual window comprises an end cover 1.2.1 and glass 1.2.2.
The rotating part seal 1.3 comprises a bearing 1.3.1, a rectangular seal ring 1.3.2, a V-shaped self-tightening seal ring 1.3.3, a flange plate 1.3.4 and a bolt 1.3.5. Because the section of the rectangular sealing ring 1.3.2 has larger contact area, the rectangular sealing ring can bear higher pressure intensity, and has smaller deformation in a relatively small area under the same pressure. The rotating main shaft 2.3 can normally rotate by being used as an inner side seal and an outer side bearing 1.3.1, and a gasket is used for playing a buffering role and protecting the bearing. The V-shaped self-tightening washer 1.3.3 can be pressed by the action of gravity. The flange plate with the small step is fastened by adopting a stud to press the V-shaped self-tightening sealing ring 1.3.3, so that the air tightness of the sealing ring 1.3 at the rotating part is ensured.
And a limiting hole for positioning the limiting mechanism of the tablet tray rotating module 2 is processed on the high-pressure combustion chamber body 1.
The upper end cap 1.4 is opened when the instrument is assembled, and loading is convenient. The side end cover 1.5 is opened to facilitate the placement of the drug strip tray unit 2.1 and the cleaning work after the experiment is finished. The support bearing 1.7 is mainly used for positioning and rotating.
As shown in fig. 4, the drug strip tray rotating module 2 includes a drug strip tray unit 2.1, a turntable 2.2, a rotating spindle 2.3, and a limiting mechanism 2.4. The position conversion of propellant medicine strips is realized through rotating the handle on the rotation main shaft 2.3 to medicine strip tray rotation module 2, and spacing mechanism 2.4 inserts the spacing hole realization of high pressure combustion chamber body 1 and rotates 2 of module 2 spacing to medicine strip tray.
As shown in fig. 5, the turntable 2.2 includes contact holes 2.2.1, drug strip tray unit holes 2.2.2, rotation spindle holes 2.2.3, and limit bosses 2.2.4.
As shown in fig. 6-a and 6-b, the drug strip tray unit 2.1 includes a drug strip tray body 2.1.1, a spacer 2.1.2, a spring contact 2.1.3, a spacer fixing groove 2.1.4, a positioning stud 2.1.5, a target wire holder 2.1.6, a target wire positioning bolt 2.1.7, an ignition wire positioning hole 2.1.8, a propellant drug strip 2.1.9, a target wire holder threaded hole 2.1.10, a target wire 2.1.11, an ignition wire 2.1.12 and a square groove 2.1.13.
The spacer 2.1.2 is used to avoid flame mixing to ignite other propellants when the propellant stick burns in the test. The propellant drug strip 2.1.1 is fixed on the drug strip tray body 2.1.1, and the positioning stud 2.1.5 is used for further fixing the propellant drug strip 2.1.1; the target line frame 2.1.6 is positioned at the outer side of the propellant drug strip 2.1.1 and fixed on the drug strip tray body 2.1.1, the target line frame 2.1.6 fixes the target line 2.1.11 through a target line positioning bolt 2.1.7, and the spring contact 2.1.3 is in circuit connection with the target line 2.1.11; ignition wire locating holes 2.1.8 are used to secure the ignition wire; the insertion of the spacers 2.1.2 into the spacer securing slots 2.1.4 effects the separation of adjacent propellant sticks 2.1.9.
As shown in figures 7-a and 7-b, the square groove 2.1.13 and the limit boss 2.2.4 form a limit fit 2.5 for limiting the medicine strip tray unit. The spring contact head 2.1.3 and the contact hole 2.2.1 form a contact matching 2.6 to realize the circuit connection between the turntable and the medicine strip tray unit 2.1 and simultaneously play a limiting role. The threaded hole 2.2.6 is connected with the contact post 4.4.1, and the contact hole 2.2.5 is contacted with the spring contact on the contact post 4.4.1 to realize the circuit connection.
As shown in fig. 8, the combustion chamber gas charging and discharging module 3 comprises a buffer gas tank 3.1, a high-pressure nitrogen gas cylinder 3.2, an electric valve 3.3 gas charging and discharging pipeline, a gas discharging valve 3.4, a pressure reducing valve 3.5, an air inlet valve 3.6 and a high-pressure nitrogen gas cylinder valve 3.7. And a high-pressure nitrogen cylinder 3.2 opens an air inlet valve 3.6 to supply air and charge pressure to the combustion chamber, and a dynamic pressure sensor detects that the pressure change in the combustor reaches a preset pressure and closes. The electric valve 3.3 is used for dynamically adjusting the pressure of the combustion chamber to maintain stable pressure, and when the pressure is higher than a preset value, the electric valve 3.3 opens the exhaust for pressure reduction. After the capacity of the buffer gas tank 3.1 is full, the exhaust valve 3.4 is opened to exhaust gas to the outside, and the large-volume buffer gas tank 3.1 can prevent pressure fluctuation in the combustion chamber.
As shown in fig. 9, the measurement and control data acquisition module 4 includes a data acquisition and display recorder 4.1, a high-frequency dynamic pressure sensor 4.2, an ignition power supply 4.3, a wall-through connector 4.4, and a contact unit 4.5. The data acquisition and display recorder 4.1 is used for acquiring target line voltage records and displaying data, the ignition source 4.3 is used for igniting and igniting propellant, and the wall-through connector 4.4 is used for realizing communication of internal and external circuits of the combustion chamber under a sealed condition. The ignition power source 4.3 is turned on, the electric heating wire works to propel propellant to burn, the target line is burnt out along with the moving of the burning surface, and the data acquisition and display recorder 4.1 generates voltage pulse recording pulse signals when the target line is burnt out.
As shown in fig. 10, the contact unit 4.5 includes a rigid contact column 4.5.1, a contact head 4.5.2, a contact plate 4.5.3 and a contact column 4.5.4 fixedly connected with the combustion chamber. The contact head 4.5.2 and the contact piece 4.5.3 constitute a contactor.
The rigid contact post 4.5.1 includes a contact post 4.5.1.1, a spring contact 4.5.1.2, and a set screw 4.5.1.3. The contact 4.5.2 comprises a blocking head 4.5.2.1, a contact slider 4.5.2.2, a slide 4.5.2.3, a spring 4.5.2.4 and a lead 4.5.2.5. The contact piece 4.5.3 comprises an arc-shaped contact piece.
Contact 4.5.2 compresses tightly contact piece 4.5.3 circuit intercommunication when current test position, rotates main shaft 2.3 and rotates, and contact 4.5.2 and contact 4.5.3 separation, and the circuit breaks off the conversion that propellant medicine strip realized the position.
As shown in fig. 11, the working method of the visual high-pressure burning rate instrument for measuring the burning rates of a plurality of solid propellant sticks disclosed in this embodiment includes the following specific implementation steps:
the method comprises the following steps: the propellant tray and the target wire rack are integrally assembled to realize that propellant drug strips and target wires are installed outside the visual high-voltage burning rate instrument in a modularized manner, namely, the circuit is conducted without line installation in the limited space of the burning rate instrument, and the propellant tray and the target wire rack are integrally assembled to realize the method as follows: the middle part of the medicine strip tray body 2.1.1 contains a round hole for placing the medicine strip, the propellant medicine strip is placed into the medicine strip tray body, and the positioning bolt is screwed down. The bottom end of the target wire rack is provided with threads which are matched with the threaded holes of the target wire rack positioned on the drug strip tray body to fix the target wire rack on two sides of propellant drug strips, and then target wires are fixed through target wire positioning bolts
Step two: put into the drug strip tray unit 2.1.
Insert the spacing block on the tablet tray unit, open the side door and adopt sealing washer and end cover seal on combustion chamber body right side, screw and this body coupling of combustion chamber for lay tablet tray unit 2.1. Open the lateral end cover of combustion chamber, lay medicine strip tray unit 2.1 in carousel tray hole, realize carousel 2.2 and medicine strip tray body 2.1.1 fixed Assembly through square groove and boss cooperation on carousel 2.2 and medicine strip tray body 2.1.1, the spring contact on the medicine strip tray unit communicates with the hole on the carousel, realizes that circuit intercommunication between medicine strip tray unit 2.1 and carousel 2.2. And closing the side end cover, rotating the rotating main shaft 2.3 by rotating the handle, ensuring that the drug strip to be tested enters a test area when the limiting hole on the handle is superposed with the positioning hole on the combustion chamber body, contacting the contact head in the contactor with the contact piece, switching on a circuit, and inserting the positioning pin.
Step three: the charging, discharging and pressure measuring are realized through the combustion chamber charging and discharging module 3. Opening a gas valve of the high-pressure nitrogen bottle to supply gas, observing a pressure value through a display screen, supplying gas to the combustion chamber through the high-pressure nitrogen bottle, measuring the pressure intensity in the combustor in real time by adopting a dynamic pressure sensor, controlling the valve to exhaust gas into the buffer bottle when the pressure intensity is higher than a steady state value, and supplying gas into the combustor through the high-pressure nitrogen bottle when the pressure intensity is lower than the steady state value to maintain the quasi-balance of the pressure intensity and achieve a preset value.
Step four: and (4) igniting the first propellant powder strip, and acquiring and observing data.
The ignition power source 4.3 is turned on, the propellant strips to be tested at the current position are burnt, the burning process of the propellant strips is observed through the visual window 1.2 of the high-pressure combustion chamber body 1, data collection is carried out through the measurement and control data collection module 4, the burning surface of the propellant is pushed to the target line to burn off the target line, an electric pulse signal is generated, and the target line voltage and the electric pulse signal are collected and recorded by the multi-channel data collection card and the display recorder 4.1. The display recorder displays the pressure change in the combustion chamber in real time. The ratio of the distance L of the combustion surface to the time difference t of the electric pulse signal is the combustion speed of the propellant powder strip under the pressure. The real-time pressure in the combustion chamber is measured by a high-frequency dynamic pressure sensor 4.2.
Step five: and rotating the medicine strip tray unit 2.1 to the next test position, inflating, exhausting and measuring pressure, and performing ignition, data acquisition and observation on the propellant medicine strips after the position conversion.
The test of single medicine strip of last position is ended, slowly rotate the hand wheel, it drives carousel 2.2 and rotates to rotate the main shaft, main shaft contact head and contact piece separation circuit disconnection, it rotates to required experimental position to drive medicine strip tray unit 2.1 through carousel 2.2, realize the conversion of medicine strip tray unit 2.1 experimental position, in addition, contain spring contact head and medicine strip tray rotation module 2 hole cooperation through contact column 4.5.1 upper end and realize the intercommunication of circuit between contact column and carousel, contact head and contact piece secondary contact after the medicine strip that awaits measuring gets into the test area of propellant medicine strip transform position, the test circuit switch-on. The limiting mechanism is inserted into the limiting hole of the high-pressure combustion chamber body 1 to limit the medicine strip tray rotating module 2. And (4) inflating, exhausting and measuring pressure according to the third step, igniting the propellant medicine strip after the position conversion, acquiring data and observing the data according to the fourth step until the propellant medicine strip test at the current position is finished.
Step six: and (4) repeating the fifth step according to test requirements, igniting the propellant drug strips after conversion, acquiring data and observing the data until all the propellant drug strips are tested, and opening the end cover to clean the visual high-pressure burning rate instrument after the test is finished.
The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A visual high-pressure burning rate appearance for many solid propellant medicine strips which characterized in that: the device comprises a high-pressure combustion chamber body (1), a drug strip tray rotating module (2), a combustion chamber air charging and discharging module (3) and a measurement and control data acquisition module (4);
the high-pressure combustion chamber body (1) comprises a combustor (1.1), a visual window (1.2), a rotating position dynamic seal (1.3), an upper end cover (1.4), a side end cover (1.5) and a sealing ring (1.6); a limiting hole for positioning a limiting mechanism of the medicine strip tray rotating module (2) is processed on the high-pressure combustion chamber body (1);
the drug strip tray rotating module (2) comprises a drug strip tray unit (2.1), a rotary table (2.2), a rotating main shaft (2.3) and a limiting mechanism (2.4); the single drug strip tray unit (2.1) is used for loading single propellant drug strips, and is provided with a fixed target line, a spring contact head (2.1.3) and a spacer (2.1.2);
the rotary table (2.2) is used for loading and fixing the drug strip tray units (2.1), and the number of fixing devices of the rotary table (2.2) used for loading and fixing the drug strip tray units (2.1) is the same as that of the drug strip tray units (2.1);
a rotating handle is arranged at the end part of the rotating main shaft (2.3);
the rotating main shaft (2.3) is driven to rotate by rotating the handle, the rotating main shaft (2.3) drives the turntable (2.2) to rotate, the medicine strip tray unit (2.1) is driven to rotate to a required test position by the turntable (2.2), the test position of the medicine strip tray unit (2.1) is converted, namely the test position of propellant medicine strips is converted, and the limiting mechanism (2.4) is inserted into a limiting hole of the high-pressure combustion chamber body (1) to limit the medicine strip tray rotating module (2);
the contact unit (4.5) comprises a rigid contact column (4.5.1), a contact head (4.5.2), a contact piece (4.5.3) and a contact column (4.5.4) fixedly connected with the combustion chamber, and the contact head (4.5.2) and the contact piece (4.5.3) form a contactor;
the contact unit (4.5) is used for realizing the following functions: the contact unit (4.5) is used for realizing the following functions: when the propellant medicine strip is in a test area with a propellant medicine strip changing position, the contact head (4.5.2) is in contact with the contact piece again, the circuit is switched on, and the closing control of the circuit in the propellant medicine strip position conversion process is realized; the upper end of the contact column (4.4.1) contains a spring contact head which is matched with a hole on the medicine strip tray rotating module (2) to realize the communication of the circuit between the contact column and the turntable, namely, the conduction and the closure of the test circuit when the propellant medicine strip position is converted are realized through the matching of the contact unit (4.5) and the medicine strip tray rotating module (2).
2. A visual high pressure combustion rate instrument for multiple solid propellant sticks as claimed in claim 1, wherein: carousel (2.2) are used for loading fixed medicine strip tray unit (2.1), and the loading is fixed mode for through processing respectively on carousel (2.2) and medicine strip tray body (2.1.1) be used for fixed complex boss or recess, in addition, insert carousel (2.1.3) through spring contact head (2.2) in be used for with spring contact head (2.1.3) complex recess, further fixed carousel (2.2) and medicine strip tray unit (2.1).
3. A visual high pressure combustion rate instrument for multiple solid propellant sticks as claimed in claim 2, wherein: the single drug strip tray unit (2.1) comprises a drug strip tray body (2.1.1), a spacing sheet (2.1.2), a spring contact head (2.1.3), a spacing sheet fixing groove (2.1.4), a positioning stud (2.1.5), a target line frame (2.1.6), a target line positioning bolt (2.1.7), an ignition line positioning hole (2.1.8), a propellant drug strip (2.1.9), a target line frame threaded hole (2.1.10) and a target line (2.1.11); the isolation sheet (2.1.2) is used for preventing flames from mixing to ignite other propellants when the propellant medicine strips are combusted in the test; the propellant drug strip (2.1.1) is fixed on the drug strip tray body (2.1.1), and the positioning stud (2.1.5) is used for further fixing the propellant drug strip (2.1.1); the target line frame (2.1.6) is positioned at the outer side of the propellant drug strip (2.1.1) and fixed on the drug strip tray body (2.1.1), the target line frame (2.1.6) fixes a target line (2.1.11) through a target line positioning bolt (2.1.7), and the spring contact head (2.1.3) is in circuit connection with the target line (2.1.11); an ignition wire positioning hole (2.1.8) for fixing an ignition wire; the isolation sheets (2.1.2) are inserted into the isolation sheet fixing grooves (2.1.4) to realize the isolation of the adjacent propellant drug strips (2.1.1).
4. A visual high pressure combustion rate instrument for multiple solid propellant sticks as claimed in claim 3, wherein: realize medicine strip and target line at the outside modularization assembly of visual high-pressure burning rate appearance through propellant tray and target line frame integration assembly, realize promptly that the circuit switches on and need not to carry out the circuit installation in burning rate appearance finite space, simplify experimental flow, improve test efficiency and maneuverability, further make things convenient for once to pressurize down the burning rate measurement to many medicine propellant medicine strips, concrete implementation method is as follows: threads are processed at the bottom end of the target line frame (2.1.6) and matched with target line frame threaded holes positioned in the drug strip tray body (2.1.1) to fix the target line frame on two sides of the propellant drug strips, and then target lines are fixed through target line positioning bolts, so that the integrated modular assembly of the target line frame and the drug strip tray is realized; the propellant medicine strip is placed in the middle of the medicine strip tray body (2.1.1), and the propellant medicine strip is fixed by a positioning bolt; the target line and the propellant powder strip can be conveniently installed outside the burner, and the target line is prevented from being installed in the limited space of the burner.
5. A visual high pressure combustion rate instrument for multiple solid propellant sticks as claimed in claim 4, wherein: the rotating part seal (1.3) comprises a bearing (1.3.1), a rectangular sealing ring (1.3.2), a V-shaped self-tightening sealing ring (1.3.3), a flange plate (1.3.4) and a bolt (1.3.5); the section of the rectangular sealing ring (1.3.2) has larger contact area, and can bear higher pressure intensity, and the deformation of a relatively small area is smaller under the same pressure; the rotating main shaft (2.3) can normally rotate by being used as an inner side seal and an outer side bearing (1.3.1), and a gasket is used for playing a buffering role and protecting the bearing; the V-shaped self-tightening washer (1.3.3) can be pressed tightly by the action of gravity; the flange plate with the small step is fastened by adopting a stud to press the V-shaped self-tightening sealing ring (1.3.3), so that the air tightness of the sealing (1.3) at the rotating part is ensured.
6. A visual high pressure combustion rate instrument for multiple solid propellant sticks as claimed in claim 5, wherein: the visual window comprises an end cover (1.2.1) and glass (1.2.2);
the combustion chamber air charging and exhausting module (3) comprises a buffer air tank (3.1), a high-pressure nitrogen cylinder (3.2), an electric valve (3.3) air charging and exhausting pipeline, an exhaust valve (3.4), a pressure reducing valve (3.5) and an air inlet valve (3.6); the electric valve (3.3) is used for dynamically adjusting the pressure of the combustion chamber to maintain stable pressure, and when the pressure is higher than a preset value, the electric valve (3.3) opens the exhaust to reduce pressure.
7. A visual high pressure combustion rate instrument for multiple solid propellant sticks as claimed in claim 6, wherein: the measurement and control data acquisition module (4) comprises a data acquisition and display recorder (4.1), a high-frequency dynamic pressure sensor (4.2), an ignition power supply (4.3), a wall-through joint (4.4) and a contact unit (4.5).
8. A visual high pressure combustion rate instrument for multiple solid propellant sticks as claimed in claim 7, wherein: the data acquisition and display recorder (4.1) is used for acquiring target line voltage records and displaying data, the ignition source (4.3) is used for igniting and igniting propellant, and the wall-through connector (4.5) realizes communication of internal and external circuits of the combustion chamber under a sealed condition.
9. A visual high pressure combustion rate instrument for multiple solid propellant sticks as claimed in claim 8, wherein: in the contact unit (4.5), the contact column (4.5.1) comprises: a post (4.5.1.1), a spring contact (4.5.1.2), a set bolt (4.5.1.3); the contact head (4.5.2) comprises: a blocking head (4.5.2.1), a contact head sliding block (4.5.2.2), a slide way (4.5.2.3), a spring (4.5.2.4) and a lead (4.5.2.5); the contact piece (4.5.3) comprises: an arc-shaped contact piece.
The contact head (4.5.2) consists of a cylindrical shell and a sliding block (4.5.2.2) placed in the shell, wherein the front part of the sliding block (4.5.2.2) is an arc surface, and the lower part of the sliding block is a cylinder; the sliding block (4.5.2.2) can slide in the cylinder body through the lower cylinder body, the sliding block is connected with the bottom of the cylinder body through a spring, the elastic coefficient of the spring (4.5.2.4) is not too large easily, and the strength of the spring meets the pressure-bearing requirement; the slider is connected with the cylinder body by a lead, the lead is connected with the spring contact at the bottom of the contact column, and the length of the lead left in the cylinder body is provided with enough allowance for preventing the slider (4.5.2.2) from moving and breaking the lead (4.5.2.5); the outer ring of the upper part of the cylinder body is provided with a blocking ring for preventing the sliding block from flying out;
the contact piece (4.5.3) is fixedly connected to a contact column body on the combustion chamber body through a screw, a groove is formed on the surface of the contact piece (4.5.3), a gap is reserved between the flat part and the front end of the contact head (4.5.2), and the gap is used for ensuring the stable connection between the contact head (4.5.2) and the contact piece (4.5.3); the contact column (4.5.1) where the contact head (4.5.2) is located is fixedly connected with the turntable (2.2) by thread connection; the rigidity of the contact column (4.5.1) is to ensure that the lateral deformation is not small enough to produce a gap for the contact head and the contact piece to be dislocated when being pressed.
10. A visual high pressure fuel gauge for a plurality of solid propellant sticks as claimed in claim 1, 2, 3, 4, 5, 6, 7, 8 or 9 wherein: the working method comprises the following steps of,
the method comprises the following steps: the propellant tray and the target wire rack are integrally assembled to realize the modularized installation of propellant drug strips and target wires outside the visual high-voltage burning rate instrument, namely, the circuit conduction is realized without the need of line installation in the limited space of the burning rate instrument, the test flow is simplified, the test efficiency and the operability are improved, and the measurement of a plurality of drug propellant columns under one-time pressurization is further facilitated;
the integrated assembly realization method of the propellant tray and the target wire rack comprises the following steps: the middle part of the medicine strip tray body (2.1.1) is provided with a round hole for placing the medicine strip, the propellant medicine strip is placed into the medicine strip tray body, and the positioning bolt is screwed down; the bottom end of the target wire rack is provided with threads which are matched with a threaded hole of the target wire rack positioned on the drug strip tray body to fix the target wire rack on two sides of the propellant drug strip, then the target wire is fixed through a target wire positioning bolt, an electric heating wire is fixed through a positioning hole on a target wire column, the target wire and the ignition wire share one low-level ground wire, the number of the target wires and the number of specific structural units are changed by the target wire column and a contactor column according to the number of electric signals required to be measured by one propellant drug strip, and the integrated modular assembly of the target wire rack and the drug strip tray is realized;
step two: putting the medicine strip tray unit (2.1);
the isolating sheet (2.1.2) is inserted into the drug strip tray unit, the right side of the combustion chamber body (1) is provided with a side door which is sealed by a sealing ring and an end cover, and the screw is connected with the combustion chamber body and used for placing the drug strip tray unit (2.1); opening the side end cover of the combustion chamber, placing the drug strip tray unit in a rotary disc tray hole, realizing the fixed assembly of the rotary disc (2.2) and the drug strip tray body (2.1.1) by matching a square groove on the rotary disc (2.2) and a boss, and realizing the line communication between the drug strip tray unit (2.1) and the rotary disc (2.2) by communicating a spring contact head on the drug strip tray unit with the hole on the rotary disc; the rotating main shaft (2.3) penetrates through the upper end cover to perform dynamic sealing treatment to realize the rotation of the device in a sealed environment, and meanwhile, bearings are arranged on two sides of the main shaft to realize the rotation of the main shaft and play a role in positioning to ensure the stability of the rotation; the side end cover is closed, the main shaft (2.3) is rotated by rotating the handle, when a limiting hole on the handle is superposed with a positioning hole on the combustion chamber body (1), the strip to be tested is ensured to enter a test area, a contact head in the contactor is contacted with a contact piece, a circuit is connected, and a positioning pin is inserted;
step three: the inflation, the exhaust and the pressure measurement are realized through the combustion chamber inflation and exhaust module (3); opening a gas valve of a high-pressure nitrogen bottle to supply gas, observing a pressure value through a display screen, supplying gas to a combustion chamber through the high-pressure nitrogen bottle, and placing a sensor and a dynamic adjusting valve on the right side of a shell in order to prevent propellant strips from being impacted by large airflow during gas inlet, wherein the gas inlet is required to be positioned on the lower side of a turntable; the dynamic pressure sensor is adopted to measure the pressure intensity in the combustor in real time, the control valve exhausts air into the buffer bottle when the pressure intensity is higher than a steady-state value, and air is fed into the combustor through the high-pressure nitrogen bottle when the pressure intensity is lower than the steady-state value to maintain the quasi-balance of the pressure intensity and reach a preset value, so that the accuracy of a measuring result is ensured; the combustor is additionally provided with an exhaust outlet to ensure that waste gas is smoothly exhausted;
step four: igniting, acquiring data and observing a first propellant powder strip;
an ignition power supply (4.3) is turned on, the propellant strips to be tested are burnt at the current position, the test propellant strips are isolated from the adjacent propellant strips to be tested by adopting an isolating sheet (2.1.2), different propellant strips are isolated by adopting an isolating sheet (2.1.2), and the propellant to be tested is prevented from being ignited by flame propagation; observing the combustion process of the propellant powder strips through a visual window (1.2) of the high-pressure combustion chamber body (1), carrying out data acquisition through a measurement and control data acquisition module (4), pushing the combustion surface of the propellant to a target line to blow the target line to generate an electric pulse signal, and acquiring and recording the voltage and the electric pulse signal of the target line by a multi-channel data acquisition card and a display recorder (4.1); the display recorder displays the pressure change in the combustion chamber in real time; the ratio of the distance L of the combustion surface to the time difference t of the electric pulse signal is the combustion speed of the propellant drug strip under the pressure; measuring the real-time pressure in the combustion chamber through a high-frequency dynamic pressure sensor (4.2);
step five: rotating the drug strip tray unit (2.1) to the next test position, inflating, exhausting and measuring pressure, and performing ignition, data acquisition and observation on the propellant drug strips after the position conversion;
after the test of a single medicine strip at the previous position is finished, slowly rotating the hand wheel to prevent the propellant from deforming or the target line from being pulled apart due to sudden overload; the rotating main shaft is driven to rotate by rotating the handle, the rotating main shaft drives the turntable (2.2) to rotate, the main shaft contact head and the contact piece separation circuit are disconnected, the turntable (2.2) drives the medicine strip tray unit (2.1) to rotate to a required test position, the test position of the medicine strip tray unit (2.1) is switched, namely the space switching of the test mechanical position of the propellant medicine strip is realized, in addition, the upper end of the contact column (4.5.1) is provided with a spring contact head which is matched with a hole on the medicine strip tray rotating module (2) to realize the circuit communication between the contact column and the turntable, namely the contact unit (4.5) is matched with the medicine strip tray rotating module (2) to realize the conduction and the closing of the test circuit when the propellant medicine strip position is switched, the switching of the propellant medicine strip test circuit relation is realized, when the medicine strip to be tested enters the test area of the propellant medicine strip conversion position, the contact head (4.5.2) is contacted with the contact piece (4.5.3), the test circuit is connected to realize the closing control of the circuit in the propellant drug strip position conversion process; the limiting mechanism is inserted into a limiting hole of the high-pressure combustion chamber body (1) to limit the medicine strip tray rotating module (2); inflating, exhausting and measuring pressure according to the third step, igniting, acquiring data and observing the propellant medicine strip after the position conversion according to the fourth step until the propellant medicine strip test at the current position is finished;
step six: the propellant medicine strips after the conversion position is repeated in the fifth step according to test requirements, ignition, data acquisition and observation are carried out until all propellant medicine strips are tested, mechanical space position conversion and control test circuit relation conversion of the propellant medicine strips are realized through rotation of a rotary table (2.2) in the fifth step, the propellant medicine strips and a dismounting device are not required to be replaced, measurement of a plurality of propellant medicine columns under one-time pressurization is realized, the time required by an inflation and loading and unloading device is further saved, the test flow is simplified, and the test efficiency and operability are improved;
after the test is finished, the end cover is opened to clean the visual high-pressure burning rate instrument.
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