Gunpowder gas normal-pressure ablation gun steel experimental device

Abstract

The invention discloses a gunpowder gas normal-pressure ablation gun steel experimental device which comprises an ablation module, a driving module, a control module and a temperature measuring module. The ablation module comprises a heat insulation baffle, a gun steel sample fixing bracket and a combustion crucible; the driving module comprises a screw guide rail and a servo motor; the control module comprises a power supply device and a motor automation driving module; the data acquisition module comprises a thermocouple, a signal collector and a processor; the combustion crucible is located on the device base, the gun steel sample fixing support is located above the crucible, the height of the gun steel sample fixing support can be adjusted, the heat insulation baffle is arranged between the support and the combustion crucible, and the ablation duration is controlled by controlling the reciprocating motion of the heat insulation baffle. The heat insulation baffle is fixed to a sliding rail on the screw guide rail, and the screw and an output shaft of the servo motor are coaxially installed. The servo motor is connected with the control module and drives the lead screw to rotate according to program setting. The thermocouple is placed on the sample fixing support, the signal end is connected with the signal collector, and the signal collector is connected with the processor to detect gunpowder gas temperature changes in real time. According to the invention, the ablation time and temperature of gunpowder gas to the gun steel can be controlled.

Description

Technical Field

[0001] The invention belongs to the field of material testing, in particular to a gunpowder gas normal pressure ablation gun steel experimental device. Background Art

[0002] The ablation of gunpowder gas is the main cause of gun barrel damage and failure. During the ablation process, the barrel surface will be corroded to form a white layer, and the mechanical properties will be significantly reduced, which will significantly accelerate the metal surface damage rate. For different gunpowders, the gas composition is different; the ablation resistance of different materials is also different. Therefore, in order to measure the ablation performance of different gunpowders on gun steel materials, a special ablation experimental device and method are needed for testing.

[0003] The existing ablation test method generally uses a closed explosive device experiment to ablate the gun steel material. This experiment is relatively complicated, and the thickness and integrity of the white layer formed by ablation are poor, which is not conducive to subsequent analysis. Another method is to test the scrapped artillery barrels, which are difficult to obtain and require a lot of financial and material resources. In short, in previous test methods, parameter information that affects ablation is not easy to obtain, and the experimental process is very complicated. Therefore, a controllable and simple test experimental device is needed to test different types of gunpowder and steel in a standardized manner. Summary of the invention

[0004] The purpose of the present invention is to provide a gunpowder gas atmospheric pressure ablation gun steel experimental device to achieve simplified and unified experiments for analyzing the ablation characteristics of gunpowder gas or evaluating the ablation resistance of materials.

[0005] The technical solution to achieve the purpose of the present invention is: a gunpowder gas atmospheric pressure ablation gun steel experimental device, including an ablation module, a drive module, a control module and a temperature measurement module; the ablation module body is a crucible, and a sample holder is provided directly above the crucible for fixing the sample; the drive module body is a lead screw slide and an insulating baffle, and the lead screw slide includes a lead screw, a slide rail, a servo motor and a lead screw holder; the insulating baffle is fixed on the slide rail, the lead screw is coaxially installed with the output shaft of the servo motor, the servo motor is directly connected to the control module, and the lead screw is driven to rotate according to the program setting, and the servo motor drives the insulating baffle to follow the slide rail and reciprocate along the direction of the lead screw; the ablation module and the drive module are placed side by side, wherein the height of the insulating baffle is between the crucible and the sample holder;

[0006] The crucible is used to hold and burn gunpowder particles, forming a high-temperature flame to ablate the sample on the bracket above it. The drive module drives the insulation baffle to cover and expose the crucible to isolate / transmit the flame, so as to control the ablation time of the sample;

[0007] During the experiment, the thermocouple in the temperature measurement module is fixed on the sample holder of the ablation module to automatically record the temperature changes during the ablation process.

[0008] Compared with the prior art, the present invention has the following significant advantages:

[0009] (1) It provides a complete atmospheric pressure ablation test device, which can easily complete the ablation experiment and measure the ablation performance of gunpowder gas on the surface, thus filling the gap in the field of ablation damage experiments.

[0010] (2) A programmable control module is used to automatically control the ablation time, realize the automation of the ablation experiment, make the ablation experiment more convenient and standardized, and reduce the difficulty of the ablation experiment.

[0011] (3) The temperature measurement module is used to monitor the temperature of the gunpowder gas around the gun steel sample in real time to evaluate the effect of the gunpowder gas temperature on the ablation characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the atmospheric pressure ablation device.

[0013] Figure 2 This is a physical picture of the overall atmospheric pressure ablation device.

[0014] Figure 3 This is the structure diagram of the driver module. DETAILED DESCRIPTION

[0015] The invention discloses a gunpowder gas atmospheric pressure ablation gun steel experimental device, comprising an ablation module, a drive module, a control module and a data acquisition module; the ablation module comprises an insulating baffle, a gun steel sample fixing bracket and a combustion crucible; the drive module comprises a screw guide rail and a servo motor; the control module comprises a power supply device and a motor automation drive module; the data acquisition module comprises a thermocouple, a signal collector and a processor; the combustion crucible is located on the device base, the gun steel sample fixing bracket is located above the crucible, the insulating baffle is between the bracket and the combustion crucible, and the ablation duration is controlled by controlling the reciprocating motion of the insulating baffle; the insulating baffle is fixed on a slide rail on the screw guide rail, and the screw is coaxially installed with the output shaft of the servo motor; the servo motor is connected to the control module, and drives the lead screw to rotate according to the program setting; the thermocouple is placed on the gun steel sample fixing bracket, the signal end is connected to the signal collector, and the signal collector is connected to the processor to detect the gas temperature change in real time.

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Combination Figure 1 and Figure 2 The invention discloses a gunpowder gas atmospheric pressure ablation gun steel experimental device, comprising an ablation module 1, a drive module 2, a control module 3, and a data acquisition module 4.

[0018] The ablation module 1 is the main part of the device, which includes a gun steel sample combustion crucible 1-1 and a fixed bracket 1-2; the crucible is used to contain and burn gunpowder, and the crucible is a cylindrical tube; the bracket is used to fix the gun steel sample and provide gunpowder gas to ablate the gun steel sample. The gun steel sample fixing bracket is located directly above the crucible, and the distance between the bracket and the crucible mouth is 2 cm. The bracket can change its height to adjust the distance between the flame and the upper bracket, thereby changing the ablation temperature.

[0019] The main body of the driving module 2 is a lead screw slide and an insulating baffle 2-1, and the lead screw slide includes a lead screw 2-2, a slide 2-3, a servo motor 2-4 and a lead screw bracket 2-5. The insulating baffle 2-1 is fixed on the slide 2-3, and the servo motor drives the insulating baffle to follow the slide to make horizontal reciprocating motion along the lead screw direction. The ablation module 1 and the driving module 2 are placed side by side, wherein the height of the insulating baffle in the driving module is between the crucible and the bracket; when the insulating baffle moves to the top of the crucible, it can completely cover the upper edge of the crucible and isolate the flame of the gunpowder; the travel of the insulating baffle along the lead screw is large enough to be able to completely cover the upper edge of the crucible and to be completely uncovered. When the baffle is located between the crucible and the bracket, it will prevent the gas from ablating the gun steel sample. When the baffle is removed, the gas will ablate the gun steel sample again. The ablation process is controlled by the horizontal reciprocating motion of the baffle.

[0020] Furthermore, the reciprocating motion of the heat-insulating baffle is realized by the lead screw guide rail in the driving module 2. Figure 3 The servo motor is the power source of the drive module. It is coaxially connected to the lead screw and drives the lead screw to rotate in the horizontal direction. The servo motor is connected to the control module and controls forward rotation, reverse rotation and stop according to the control signal; the lead screw is fixed to the base of the device through the lead screw bracket; the slide rail is fixed to the lead screw, and the insulation baffle is fixed to the slide rail. According to the forward and reverse rotation of the lead screw, the slide rail drives the insulation baffle to move horizontally.

[0021] Preferably, the power of the servo motor needs to reach more than 200W to meet the needs of rapid response of the entire device.

[0022] Furthermore, the drive module 2 is controlled by a signal from the control module 3. The control module includes a power supply device 3-1 and an automatic control circuit 3-2; the power supply device is used to provide electrical energy to the entire device; the automatic control circuit uses a keypad on the panel to set the ablation time, and after starting to work, sends a working signal to the drive motor according to the setting. When the insulation baffle is fully opened, the control circuit starts timing, and when the set time is reached, the control circuit sends a signal to the servo motor to drive the insulation baffle to close completely.

[0023] Furthermore, the experimental process requires real-time monitoring of the temperature of the gunpowder gas around the gun steel sample, and the temperature monitoring is achieved by the temperature measurement module 4; the temperature measurement module 4 can work independently, it is separately arranged, and the temperature measurement module includes a thermocouple 4-1, a signal processor 4-2 and a processor 4-3; the thermocouple probe is fixed on the gun steel sample fixing bracket, when the temperature around the probe changes, the two pins of the thermocouple will generate an electric potential difference; the signal collector collects the electric potential signal of the thermocouple and transmits it to the processor; the processor converts the temperature electrical signal into gas temperature information for storage.

[0024] Preferably, a tungsten-rhenium thermocouple is used to measure the temperature, and the temperature range thereof reaches 0 to 2000°C.

[0025] Preferably, an Agilent signal collector is used, and its signal collection frequency can reach 100,000 Hz.

[0026] The ablation experimental device of the present invention has the following working process:

[0027] Before the test begins, adjust the bracket to the appropriate height as needed to adjust the distance between the gunpowder and the gun steel sample. Add the appropriate gunpowder to the crucible and fix the ablated gun steel sample on the fixed bracket above the crucible. Figure 1 Connect the temperature measurement module and fix the thermocouple probe at the same position of the gun steel sample.

[0028] After completing the preparation of the device, turn on the control module, which will automatically control the drive module to move the insulation baffle to just above the crucible, and then set the ablation time through the keypad on the control module panel.

[0029] After the ablation time is set, the gunpowder in the crucible is ignited, and the gunpowder will burn quickly and then gradually stabilize. Due to the obstruction of the insulation baffle, the gas at this time will not ablate the gun steel sample. After the combustion is stable, press the start button of the control module, and the insulation baffle will be quickly moved away, and the gunpowder gas will quickly ablate the gun steel sample. At this time, the control module automatically records the ablation time. When the ablation time reaches the set time, the control module controls the drive module to move the insulation baffle back to the top of the crucible and isolate the gas again. The flame will automatically go out after the gunpowder is burned out.

[0030] During the ablation process, the temperature measurement module will automatically record the gas temperature around the blasting steel sample.

[0031] After the ablation is completed, the gun steel sample is taken out and the ablation characteristics of the gunpowder gas on the gun steel sample are analyzed through surface detection to test the ablation resistance of the gun steel material.

[0032] The gunpowder gas atmospheric pressure ablation gun steel experimental device of the present invention can measure the atmospheric pressure ablation characteristics of different gunpowders on different gun steels. The ablation time can be controlled by changing the amount of gunpowder, and the temperature can be controlled by changing the distance between the gunpowder and the gun steel sample. In this way, the ablation test can be simplified and controlled.

Claims

1. A gunpowder gas atmospheric pressure ablation gun steel experimental device, characterized in that: The invention comprises an ablation module (1), a drive module (2), a control module (3) and a temperature measurement module (4); the ablation module (1) comprises a crucible (1-1) as the main body, and a sample holder (1-2) is arranged directly above the crucible (1-1) for fixing the sample; the drive module (2) comprises a lead screw guide rail and a heat insulating baffle (2-1), and the lead screw guide rail comprises a lead screw (2-2), a guide rail (2-3), a servo motor (2-4) and a lead screw holder (2-5); the heat insulating baffle (2-1) is fixed to the guide rail (2-3) and a servo motor (2-4) is arranged on the guide rail (2-5) and a servo motor (2-5) is arranged on the guide rail (2-3 ...5) is arranged on the guide rail (2-3) and a servo motor (2-4) is arranged on the guide rail (2-5) and a servo motor (2-5) is arranged on the guide rail (2-3) and a servo motor (2-5) is arranged The lead screw (2-2) and the output shaft of the servo motor (2-4) are coaxially installed, the servo motor (2-4) is directly connected to the control module (3), and the lead screw (2-2) is driven to rotate according to the program setting, and the servo motor (2-4) drives the heat-insulating baffle (2-1) to follow the slide rail (2-3) and reciprocate along the direction of the lead screw (2-2); the ablation module (1) and the drive module (2) are placed side by side, wherein the height of the heat-insulating baffle (2-1) is between the crucible (1-1) and the sample holder (1-2); The crucible (1-1) is used to contain and burn gunpowder particles to form a high-temperature flame to ablate the sample on the support (1-2) above it, and the driving module (2) drives the heat-insulating baffle (2-1) to cover and expose the crucible (1-1) to isolate / transmit the flame, thereby controlling the ablation time of the sample; During the experiment, the thermocouple (4-1) in the temperature measurement module (4) is fixed on the sample holder (1-2) of the ablation module (1) to automatically record the temperature change during the ablation process.

2. The gunpowder gas atmospheric pressure ablation gun steel experimental device according to claim 1 is characterized in that: The distance between the sample support (1-2) and the upper edge of the crucible (1-1) can be adjusted.

3. The gunpowder gas atmospheric pressure ablation gun steel experimental device according to claim 1 is characterized in that: When the heat-insulating baffle (2-1) is located and moved to the top of the crucible (1-1), it can completely cover the upper edge of the crucible (1-1) to isolate the flame of the gunpowder; the travel of the heat-insulating baffle (2-1) along the lead screw (2-2) is large enough to completely cover the upper edge of the crucible (1-1), and at the same time, the upper edge of the crucible (1-1) can be completely uncovered.

4. The gunpowder gas atmospheric pressure ablation gun steel experimental device according to claim 1, characterized in that: The control module (3) comprises a power supply device and an automatic control circuit. The power supply device is used to supply power to the whole. The automatic control circuit is a single chip microcomputer. A small keyboard is externally connected to the panel. The time for opening the insulation baffle is set before the experiment. After starting work, the servo motor (2-4) is driven to automatically operate according to the set time.

5. The gunpowder gas atmospheric pressure ablation gun steel experimental device according to claim 1, characterized in that: The temperature measurement module (4) comprises a thermocouple (4-1), a signal collector (4-2) and a processor (4-3); the thermocouple (4-1) adopts a tungsten-rhenium high-temperature thermocouple, the signal collector (4-2) adopts a high-frequency signal collector to collect the electrical signal of the thermocouple, and the processor (4-3) converts the electrical signal into temperature information.

Images