A rearward motion and rotation dual-environment force test projectile for high acceleration and high rotation speed

Abstract

The present application relates to the field of ground mechanics environment test, in particular to a rearward motion and rotation double-environment force test projectile for high acceleration and high rotation speed, comprising a shell, a head cover and a tail cover, the head cover is provided with a pin; the shell is provided with a first cylindrical tool and a second cylindrical tool; the first cylindrical tool is used for mounting a measured object or an acceleration sensor; the second cylindrical tool is provided with a collection test module; compared with the traditional method, the present application improves the test precision; without a wire slot on one side of the projectile body, the mass center deviation is greatly reduced, the violent vibration possibly generated at high speed rotation is avoided, the wing-shaped structure is arranged on the inner wall of the projectile body, so that the contents in the projectile body can rotate together while the projectile rotates, and the rearward motion and rotation double-environment under high acceleration and high rotation speed is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ground mechanics environment test, in particular to a rearward motion and rotation dual-environment force test projectile for high acceleration and high rotation speed. BACKGROUND

[0002] The rearward motion and rotation dual-environment force ground simulation loading system is an important ground mechanics environment test equipment. The equipment is mainly used for simulating the special load of coupling rearward motion and rotation of a shell and internal components thereof when a shell is launched by a gun, checking whether various components on the shell can work normally under the environment, and especially having an irreplaceable important role in the research and development and production of liquid battery used for ignition. The test principle is that a test projectile with a plug hits a combined shock wave generator rotating at a certain speed, the overloading caused by the collision of the projectile and the wave generator simulates the rearward motion environment, and the wave generator drives the projectile to rotate to simulate the rotation environment when the shell is launched by the gun.

[0003] The test projectile mainly functions to carry the components to be tested to simulate the rearward motion and rotation dual-environment force required for testing, detect the working state of the components to be tested, and measure whether the generated impact overloading meets the testing requirements. For the measurement of the impact overloading, the traditional method is to arrange the components to be tested and an acceleration sensor along the axis in the projectile, and simultaneously measure the working parameters of the components and the impact overloading by one launch. This method has simple principle and less operation times, but due to the attenuation of the overloading along the axial direction, there is a gap between the overloading value measured by the acceleration sensor and the overloading value received by the components to be tested, and the testing accuracy is poor. This method needs to open a wire slot on one side of the projectile body, causing large radial deviation of the center of mass, and is prone to severe vibration at high speed rotation. The components to be tested, the acceleration sensor and the acquisition and measurement device need to be simultaneously accommodated in the projectile body, causing large axial dimension of the projectile and increase of the mass, which is not conducive to the realization of high overloading.

[0004] Therefore, it is necessary to provide a rearward motion and rotation dual-environment force test projectile for high acceleration and high rotation speed to solve the above problems. SUMMARY

[0005] The present application provides a rearward motion and rotation dual-environment force test projectile for high acceleration and high rotation speed to solve the problems that the existing method has a gap between the overloading value measured by the acceleration sensor and the overloading value received by the components to be tested due to the attenuation of the overloading along the axial direction, the testing accuracy is poor, the method needs to open a wire slot on one side of the projectile body, causing large radial deviation of the center of mass, and is prone to severe vibration at high speed rotation, and the components to be tested, the acceleration sensor and the acquisition and measurement device need to be simultaneously accommodated in the projectile body, causing large axial dimension of the projectile and increase of the mass, which is not conducive to the realization of high overloading.

[0006] The rearward motion and rotation dual-environment force test projectile for high acceleration and high rotation speed of the present application adopts the following technical scheme, comprising:

[0007] The shell is through at both ends, and one end is provided with a head cover, and the other end is provided with a tail cover, wherein a plug pin is arranged on the side of the head cover away from the tail cover;

[0008] A first cylindrical tool and a second cylindrical tool are sequentially arranged in the shell from the head cover to the tail cover; the first cylindrical tool is used for mounting a test piece or an acceleration sensor; the second cylindrical tool is internally provided with a test collecting module; and a buffer assembly is arranged between the first cylindrical tool and the second cylindrical tool and between the second cylindrical tool and the tail cover;

[0009] The test collecting module is used for collecting an overload value of the test piece or the acceleration sensor.

[0010] The beneficial effects of the present application are:

[0011] By separating the acceleration sensor and the test piece, manufacturing a test projectile and a calibration projectile according to the acceleration sensor and the test piece respectively, reducing the size of the projectile in the axial direction, and also reducing the mass of the projectile, the experimental conditions meeting the experimental requirements are determined by using the calibration projectile, and then the test projectile is used for experiment in the experimental environment, thereby improving the test precision compared with the traditional method; and a wire slot is not needed to be opened on one side of the projectile body, the mass center deviation is greatly reduced, the violent vibration possibly generated during high-speed rotation is avoided, and the wing-shaped structure is arranged on the inner wall of the projectile body, so that the contents in the projectile body can also rotate at the same time.

[0012] The projectile of the present application can be used under high rotation speed and high overload conditions, and can be used at a maximum of 30000g and 20000RPM; the mass of the projectile is relatively light (≯1.2kg), and the axial moment of inertia is relatively small (≯0.001 The principle and structure of the present application are simple, the assembly and debugging are convenient, and the present application is easy to implement in engineering, and the time for completing one test is obviously shortened compared with the integrated measurement method in actual use. At the same time, the design difficulty of the test collecting module is simplified, and the cost is reduced. This makes the present application have a great application prospect in the field of double-environment force ground simulation loading test of recoil and rotation, and helps to improve the production and test level of missile-borne electronic components. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating any inventive labor.

[0014] Figure 1An assembly drawing of the overall structure of a rearward movement and rotation dual environmental force test projectile for high acceleration and high rotation speed according to the present application;

[0015] Figure 2 An assembly drawing of the overall structure of a rearward movement and rotation dual environmental force test projectile for high acceleration and high rotation speed according to the present application;

[0016] Figure 3 A structural schematic diagram of a head cover in a rearward movement and rotation dual environmental force test projectile for high acceleration and high rotation speed according to the present application;

[0017] Figure 4 A connection structure schematic diagram of a head cover and a shell in a rearward movement and rotation dual environmental force test projectile for high acceleration and high rotation speed according to the present application;

[0018] Figure 5 A connection structure schematic diagram between a tooling and a shell and between the tooling and its internal components in a rearward movement and rotation dual environmental force test projectile for high acceleration and high rotation speed according to the present application;

[0019] Figure 6 A connection structure schematic diagram between a tooling and its internal components in a rearward movement and rotation dual environmental force test projectile for high acceleration and high rotation speed according to the present application.

[0020] In the figure: 1, a pin; 2, a fastening bolt; 3, a head cover; 4, a first cylindrical tooling; 5, a middle buffer pad; 6, a second cylindrical tooling; 7, a test module; 8, a tail buffer pad; 9, a shell; 10, a tail cover; 11, a mounting hole; 12, a fastening bolt hole; 13, a mounting protrusion; 14, a limiting groove; 15, a guide groove; 16, a guide protrusion; 17, a positioning strip; 18, a positioning groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0022] An embodiment of a rearward movement and rotation dual environmental force test projectile for high acceleration and high rotation speed according to the present application is shown in the figure, Figure 1As shown, including: the shell 9, the opposite ends of the shell 9 are through, and the shell 9 is provided with a head cover 3 at one end, and the other end of the shell 9 is provided with a tail cover 10, wherein the side of the head cover 3 away from the tail cover 10 is provided with a pin 1; the first cylindrical tool 4, the second cylindrical tool 6 are sequentially arranged in the shell 9 from the head cover 3 to the tail cover 10 of the shell 9; the first cylindrical tool 4 is used for installing the measured member or the acceleration sensor; the second cylindrical tool 6 is provided with a collection test module 7; and the first cylindrical tool 4 and the second cylindrical tool 6, the second cylindrical tool 6 and the tail cover 10 are all provided with a buffer assembly, and the collection test module 7 is used for collecting the overload value of the measured member or the acceleration sensor, and the collection test module includes: a metal shell, the inside of the metal shell is packaged with a collection test storage circuit and a battery, the battery is used for power supply of the collection test storage circuit, the collection test storage circuit is used for collecting and storing the electric signal in the test process; wherein the positioning groove 18 is arranged on the metal shell, and it should be noted that after the completion of the one-time impact test, the stored electric signal data is read and processed by software, the overload value of the sensor or the measured member in the experimental process is obtained, and the obtained overload value is compared with the required overload value of the test, so as to facilitate the next experiment.

[0023] As shown in the drawings, Figure 1 and Figure 2 As shown, the pin 1 is a smooth metal sharp needle, and the material is 45# steel. The pin 1 includes a cylindrical segment and a conical segment. The cylindrical segment is partially embedded in the pin mounting hole 11 on the head cover 3. The pin mounting hole 11 on the head cover 3 is a two-section through hole. The diameter of one section is larger than that of the other section. The end of the mounting hole 11 with the larger diameter is directed towards the head of the projectile for mounting the pin 1. The end of the mounting hole 11 with the smaller diameter is directed towards the tail of the projectile. When the pin 1 is removed, it is pushed out from the end of the head cover 3 towards the tail of the projectile.

[0024] As shown in the drawings, Figure 1 As shown, the shell 9 is a hollow metal cylindrical body made of 7075 high-strength aluminum alloy. A limiting groove 14 is arranged on the inner wall of one end of the cylindrical body. An external thread is arranged on the outer periphery of the other end of the cylindrical body. The head cover 3 is a solid metal block made of titanium alloy. A cylindrical protrusion is arranged on the side surface of the head cover 3. The outer periphery of the cylindrical protrusion is provided with a mounting protrusion 13 matched with the limiting groove 14. The side surface of the tail cover 10 is a cylindrical groove. An internal thread is arranged on the inner wall of the cylindrical groove matched with the external thread. Figure 4 As shown in the drawings, Figure 1and Figure 3 As shown, the head cover 3 and the end face of the cartridge case 9 are connected by fastening bolt 2 (using national standard hexagon socket head cap screws). It should be noted that the mounting protrusion 13 can be a metal block. The guide groove and arc groove on the inner wall of the cylindrical body form an L-shaped groove. The fastening bolt 2 can only be installed after the metal block is rotated to the bottom of the arc groove of the L-shaped groove.

[0025] like Figure 1 and Figure 5 As shown, the first cylindrical tooling 4, the second cylindrical tooling 6, and the buffer assembly are all disposed inside the cartridge case 9 through a guide structure, and the guiding direction of the guide structure is the axial direction of the cylindrical body. The first cylindrical tooling 4 and the second cylindrical tooling 6 have the same structure, both including: a cylinder, which is slidably connected to the guide groove 15 disposed on the inner wall of the cylindrical body of the cartridge case 9 through a guide protrusion 16 disposed on the outer wall. The guide protrusion 16 and the guide groove 15 are disposed along the axial direction of the cartridge case 9; its inner wall is slidably connected to the positioning groove 18 disposed on the outer wall of the test piece or the acceleration sensor through a positioning strip 17.

[0026] It should be noted that the first cylindrical fixture 4 is a metal cylinder with a two-wing structure. The test piece (DPT) or an accelerometer can be embedded inside the cylinder. Four set screws are evenly distributed around the cylinder, with their ends entering the cylinder to press the DPT or accelerometer firmly against it. The cylinder is made of 7075 high-strength aluminum alloy. The assembly method between the DPT and the first cylindrical fixture 4 depends on the specific shape of the DPT; different DPTs require different first cylindrical fixtures 4. However, the first cylindrical fixture 4 and the cartridge case 9 are connected via a guide structure, i.e., as shown... Figure 5 and Figure 6 As shown, the guide protrusion 16 (in this embodiment, the guide protrusion 16 is a wing-shaped structure) is provided on the outer wall of the first cylindrical tooling 4. The guide protrusion 16 is slidably connected to the guide groove 15 provided on the inner wall of the cylindrical inner shell 9. After assembly, the first cylindrical tooling 4 can slide along the guide groove 15. The first cylindrical tooling 4 and the test piece are slidably connected by a positioning strip 17 provided on the inner wall of the first cylindrical tooling 4 and a positioning groove 18 provided on the outer wall of the test piece. Both the positioning strip 17 and the positioning groove 18 are provided along the axial direction of the cylinder of the first cylindrical tooling 4. The first cylindrical tooling 4 and the acceleration sensor are also slidably connected by a positioning strip 17 provided on the inner wall of the first cylindrical tooling 4 and a positioning groove 18 provided on the outer wall of the acceleration sensor.

[0027] like Figure 6As shown, the outer wall of the second cylindrical tool 6 is provided with a guide protrusion 16 (in this embodiment, the guide protrusion 16 is a wing-shaped structure 16). The guide protrusion 16 is in sliding connection with the guide groove 15 provided on the inner wall of the cylindrical body of the shell 9. After assembly, the second cylindrical tool 6 can slide along the guide groove 15. The second cylindrical tool 6 and the collection and test module 7 inside it are matched in the following manner: a protruding positioning strip 17 is provided on the inner wall of the cylinder of the second cylindrical tool 6. The positioning strip 17 is matched with the positioning groove 18 provided on the outer periphery of the collection and test module 7, so as to realize the constraint of the circumferential movement of the collection and test module 7, and ensure that the second cylindrical tool 6 and the collection and test module 7 rotate together when the shell 9 rotates. The collection and test module 7 includes a metal shell made of aluminum alloy. The positioning groove 18 provided on the outside of the metal shell is a half-through positioning groove. The inside of the metal shell is packaged with a collection and test storage circuit.

[0028] Specifically, the buffer assembly is an elastic buffer pad. Two wing-shaped structures are uniformly arranged on the outer periphery of the elastic buffer pad. The material of the elastic buffer pad is TPU, and the processing mode is 3D printing. Figure 2 As shown in this embodiment, the elastic buffer pad between the first cylindrical tool 4 and the second cylindrical tool 6 is a middle buffer pad 5. The elastic buffer pad between the tail cover 10 and the second cylindrical tool 6 is a tail buffer pad 8. The elastic tail buffer pad 8 realizes the compression of the contents. The contents of the projectile from the head to the tail of the shell 9 are, in sequence, the first cylindrical tool 4 and the acceleration sensor or test piece inside it, the middle buffer pad 5, the second cylindrical tool 6 and the collection and test module 7 inside it, and the tail buffer pad 8. After the assembly of these components is completed, the total length is slightly longer than the effective length of the shell 9. The tail buffer pad 8 realizes the compression of the contents.

[0029] Specifically, the mass of the test piece is not greater than the mass of the acceleration sensor 50g.

[0030] Specific working principle:

[0031] Step 1: Design and manufacture corresponding tooling and collection and test modules according to the test piece and test requirements.

[0032] Step 2: Design the sensor tooling so that the total mass of the sensor + tooling is deviated from the total mass of the test piece + tooling by ≯ 50g, so as to ensure that the test piece and the sensor receive the same overload value under the same experimental conditions.

[0033] Step 3: Explore the launch conditions required to achieve the required double environmental forces of setback and rotation. Use the overload calibration projectile to set different air pressures from low to high to obtain different overload values. Select the air pressure corresponding to the required overload value to explore the launch conditions required to achieve the required double environmental forces of setback and rotation.

[0034] Step 4, according to the launch condition obtained in step 3, the calibration projectile is replaced by the test projectile, and the working condition of the test object in the experimental environment is detected by using the test projectile, that is, the reliability test in the high overload environment.

[0035] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A dual environment test projectile for high acceleration and high rotational speed, characterized in that, The utility model relates to a kind of test device for acceleration sensor and the like, including: Shell (9), corresponding two ends are through, and its one end is provided with head cover (3), the other end is provided with tail cover (10), wherein, the side of head cover (3) away from tail cover (10) is provided with insertion pin (1); First cylindrical tooling (4) is used to install measured piece or acceleration sensor from the head cover (3) of shell (9) to tail cover (10) in shell (9) sequentially;Second cylindrical tooling (6) is installed with acquisition test module (7) in it;And buffer assembly is arranged between first cylindrical tooling (4) and second cylindrical tooling (6), and between second cylindrical tooling (6) and tail cover (10). Wherein, acquisition test module (7) is used to collect overload value that measured piece or acceleration sensor receives; Shell (9) is cylindrical body, the inner wall of one end of cylindrical body is provided with limiting groove (14), and the outer periphery of the other end is provided with external thread, wherein, the side of head cover (3) is provided with cylindrical protrusion matched with inner ring of cylindrical body, and the outer peripheral surface of cylindrical protrusion is provided with mounting protrusion (13) matched with limiting groove (14);The side of tail cover (10) is cylindrical groove, and the inner wall of cylindrical groove is provided with internal thread matched with external thread;First cylindrical tooling (4), second cylindrical tooling (6) and buffer assembly are arranged in shell (9) by guide structure, and the guide direction of guide structure is the axial direction of cylindrical body;The structure of first cylindrical tooling (4) and second cylindrical tooling (6) is same, and it includes: cylinder, which is connected with the inner wall of the cylindrical body of shell (9) by the guide protrusion (16) provided on the outer wall and the guide groove (15) provided on the inner wall, wherein, the guide protrusion (16) and the guide groove (15) are arranged along the axial direction of shell (9);The inner wall is connected with the positioning groove (18) provided on the outer wall of measured piece or acceleration sensor by positioning strip (17). According to measured piece and test requirement, corresponding tooling and acquisition test module are designed and manufactured;The sensor tooling is designed so that the total mass of sensor+tooling is deviated from the total mass of measured piece+tooling by ≯50g, to ensure that the overload value received by measured piece and sensor is same under the same experimental condition;The required launch condition for realizing the required recoil and rotation double environmental force is explored, the different overload values are obtained by setting different air pressure from low to high by using overload calibration projectile, the air pressure corresponding to the required overload value is selected, and the required launch condition for realizing the required recoil and rotation double environmental force is explored;According to the launch condition, the calibration projectile is replaced by test projectile, and the working condition of measured piece in the experimental environment is detected by using test projectile, i.e. reliability test under high overload environment.

2. The rearward flight and spin dual-environment force test projectile for high acceleration and high rotational speed according to claim 1, characterized in that, Limiting groove (14) includes arc-shaped groove of inner wall of cylindrical body, and guide groove communicated with arc-shaped groove is opened in the inner wall of cylindrical body along the axial direction of cylindrical body, wherein, cylindrical protrusion rotates head cover (3) to realize head cover (3) installation after entering arc-shaped groove through guide groove.

3. The dual-recoiling and rotating environment test projectile for high acceleration and high rotation speed according to claim 1, characterized in that, Guide protrusion (16) is wing-shaped structure.

4. The dual-recoiling and rotating environment test projectile for high acceleration and high rotation speed according to claim 1, characterized in that, The acquisition test module (7) comprises a metal shell, the inside of the metal shell is packaged with an acquisition test storage circuit and a battery, the battery is used for supplying power for the acquisition test storage circuit, and the acquisition test storage circuit is used for collecting and storing electric signals in a test experiment process; wherein a positioning groove (18) is arranged on the metal shell.

5. The dual-representative projectile for high acceleration and high rotation test according to claim 1, wherein, The buffer assembly is an elastic buffer pad.

6. The dual-representative projectile for high acceleration and high rotation test according to claim 1, wherein, The mass of the to-be-tested piece is not greater than 50g of the mass of the acceleration sensor.

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