Device for testing recoil force

Abstract

The utility model belongs to the technical field of artillery testing, and discloses a device for testing recoil force, which comprises a test bench (1), a strain gauge (2), a support frame (3), a connecting frame (5), a screw rod (6), a pressure cap (7), a pressure seat (10), a left arc plate (11), a right arc plate (12) and a pressure sensor (13), the strain gauge (2) is attached to the maximum stress point of the test bed (1); the screw rod (6) is screwed into the support frame (3) from the front end to the rear end; a pressure cap (7) is arranged at the rear end of the screw rod (6), and the end part of the pressure cap (7) is in contact with a pressure sensor (13). The recoil force simulation device does not need to adjust the structure of the artillery, is used for simulating the recoil force through a force applying device, not only can be used for the artillery which is compact in structure and cannot be provided with a sensor, but also can be used for verifying the correctness of theoretical calculation by using the structure of the device, and also provides a new way for testing the recoil force of the artillery.

Description

Technical Field

[0001] The utility model belongs to the technical field of artillery testing, in particular to a device for testing the recoil of artillery. Background Art

[0002] When a cannon is fired, the barrel and its attached parts generate a force opposite to the projectile's direction of motion, known as recoil. In a rigid mount, recoil acts directly on the mount through the trunnions. In a flexible mount, the barrel and mount are connected by a recoil mechanism, which dissipates and stores recoil energy and returns the recoiled parts to their original position, mitigating the impact of recoil on the mount. Recoil is a critical design parameter for artillery weapon systems. Existing recoil measurement methods typically involve installing pressure and displacement sensors on the recoil brake and then calculating them using formulas. However, the accuracy of the results cannot be verified. For compact guns, the space for sensor installation is limited. Given these issues, a device for measuring recoil is needed. Utility Model Content

[0003] The technical problems to be solved by the present invention are: installing a pressure sensor and a displacement sensor on the recoil machine, and then combining them with formula calculation, the accuracy of the calculation result cannot be verified; for artillery with a compact structure, the installation space of the sensor is limited.

[0004] In order to solve the above technical problems, the specific technical solutions of the present utility model are as follows:

[0005] A device for testing recoil force includes a test bench 1, a strain gauge 2, a support frame 3, a connecting frame 5, a screw 6, a pressure cap 7, a pressure seat 10, a left arc plate 11, a right arc plate 12, and a pressure sensor 13; the strain gauge 2 is attached to the maximum force point of the test bench 1, the test bench 1 is fixedly connected to the support frame 3, the front end of the support frame 3 is provided with a circular hole for inserting the screw 6, and the rear end is provided with a thread that cooperates with the screw 6; the screw 6 is screwed into the support frame 3 from the front end to the rear end; the rear end of the screw 6 is provided with a pressure cap 7, and the end of the pressure cap 7 is in contact with the pressure sensor 13;

[0006] The connecting frame is a box-type frame structure, wherein a through hole is provided in the middle thereof and runs through the front and back. The pressure seat 10 is provided in the through hole of the connecting frame, and the pressure sensor 13 is fixedly connected to the pressure seat 10.

[0007] The left arc plate 11 and the right arc plate 12 are fixed on the left and right sides of the connecting frame respectively. The left arc plate 11 and the right arc plate 12 are coaxially arranged; the left arc plate 11 and the right arc plate 12 cooperate with the ear shaft holes on the test bench 1.

[0008] Furthermore, the connecting frame includes a pressure plate 8 and a square steel bracket 9.

[0009] Furthermore, the pressure plate 8 is a quadrilateral plate material, and a circular hole for inserting the pressure seat 10 is provided in the middle.

[0010] Furthermore, the two pressure plates 8 are arranged in parallel, and their four corners are fixedly connected by four square steel brackets 9 to form a box-type frame structure.

[0011] Furthermore, the straight sides of the left arc plate 11 and the right arc plate 12 are arranged forward and the arc sides are arranged backward.

[0012] Furthermore, the front end of the screw rod 6 is hexagonal, the middle part is a threaded rod, and the rear end has an internal thread.

[0013] The utility model has the following advantages: there is no need to adjust the structure of the artillery, and the device for applying force is used to simulate recoil. The trunnion-like structure of the trunnion can be replaced to withstand recoil and obtain a recoil-strain curve. The utility model can be used for artillery with a compact structure that cannot be equipped with sensors. The device structure can also be used to verify the correctness of theoretical calculations, and it also provides a new way to test artillery recoil. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the device for testing recoil of the present invention;

[0015] Figure 2 for Figure 1 A-direction view;

[0016] Figure 3 This is a schematic diagram of the structure of a device for testing recoil in the present invention;

[0017] Figure 4 This is the main view of the support frame;

[0018] Figure 5 for Figure 4 A-direction view;

[0019] Figure 6 This is the front view of the trunnion-like structure;

[0020] Figure 7 for Figure 6 A-direction view;

[0021] Figure 8 This is the main view of the connecting frame;

[0022] Figure 9 for Figure 8 sectional view of

[0023] Explanation of the marks in the figure: 1-test bench; 2-strain gauge; 3-support frame; 4-trunnion device; 5-connecting frame; 6-screw; 7-pressure cap; 8-pressure plate; 9-square steel bracket; 10-pressure seat; 11-left arc plate; 12-right arc plate; 13-pressure sensor. DETAILED DESCRIPTION

[0024] In order to better understand the purpose, structure and function of the present invention, the present invention is described in further detail below with reference to the accompanying drawings.

[0025] like Figures 1-9 As shown, a device for testing recoil force of the present invention includes: a test bench 1; a strain gauge 2; a support frame 3; a trunnion-like device 4; a connecting frame 5; a screw 6; a pressure cap 7; a pressure plate 8; a square steel bracket 9; a pressure seat 10; a left arc plate 11; a right arc plate 12; and a pressure sensor 13. Among them, the test bench 1 is the bench used when the artillery is fired; the strain gauge 2 is attached to the maximum stress point of the test bench 1; the support frame 3 is a welded structure, which is welded into a frame with sufficient rigidity according to the stress characteristics of the artillery. The front end of the support frame 3 is provided with a round hole for convenient insertion of the screw 6, and the rear end is provided with a thread that cooperates with the screw 6. The round hole at the front end and the threaded hole at the rear end need to be processed after welding to ensure the coaxiality of the two, so as to ensure that the screw 6 can be smoothly screwed in from the front end to the rear end; the front end of the screw 6 is hexagonal, which is convenient for tools to grab, the middle part is a threaded rod, and the rear end has an internal thread, which cooperates with the pressure cap 7; the end of the pressure cap is flat, and contacts with the pressure sensor 13 when force is applied, increasing the contact area to prevent the pressure sensor 13 from being crushed; the tail is an external thread, which cooperates with the screw 6.

[0026] The pressure plate 8 is a square sheet with a circular hole in the center for inserting the pressure seat 10. The square steel bracket 9 is a standard part. The pressure seat 10 is a stepped column with a hole drilled at the rear end to reduce weight. Two pressure plates 8 are placed one behind the other, with four square steel brackets 9 welded around them. The pressure seat 10 is inserted into the circular holes of the two pressure plates 8, and then welded around the holes to form the connecting frame 5.

[0027] Since only the rear semicircle of the left and right trunnions bears the recoil during actual shooting, the left and right circular arc plates 11 and 12 used in the trunnion-like structure are semicircular structures. The left and right circular arc plates 11 and 12 are welded to both sides of the connecting frame 5. After welding, to ensure the coaxiality of the left and right circular arc plates 11 and 12, they need to be processed under the same reference after welding, and threaded holes are provided on the periphery for connection to the test bench 1. The processed left and right circular arc plates are guaranteed to be completely consistent with the left and right trunnions in terms of size, hardness, surface roughness and precision. The small cylindrical surface of the pressure seat 10 is processed into an external thread to facilitate cooperation with the pressure sensor 13. To ensure that the applied force is evenly distributed on the left and right circular arc plates 11 and 12, the external thread on the pressure seat 10 must be ensured to be in the center of the device after processing, and the axis is perpendicular to the end faces of the left and right circular arc plates 11 and 12. The above constitutes the trunnion-like device 4.

[0028] The basic implementation process is as follows:

[0029] Working process:

[0030] Step 1: The left arc plate 11 and the right arc plate 12 on the trunnion-like shaft 4 replace the trunnion and are threadedly connected to the left and right sides of the test bench 1;

[0031] Step 2: Fix the support frame 3 with sufficient rigidity to both sides of the test bench 1 through screws to ensure that the loading force is consistent with the recoil force of the gun;

[0032] Step 3: Attach the strain gauge 2 to the left and right sides of the test bench 1, screw the screw 6 into the support frame 3, and connect the pressure cap 7 to the tail of the screw 6 with a thread. Continue to screw the screw 6 to make the pressure cap 7 and the pressure sensor 13 in close contact, simulating the recoil force, and obtaining the relationship between the recoil force and the strain.

[0033] Step 4: During the actual shooting process, the test bench 1, strain gauge 2, and the position of the strain gauge remain unchanged. According to the strain size, the corresponding recoil value is read on the curve in the above step 3. At this point, the recoil can be simply obtained.

[0034] The recoil test device proposed in this embodiment can derive the recoil from the curve according to the strain value; the correctness of the theoretical calculation can also be verified based on this curve, providing a strong guarantee for the design and shooting reliability.

[0035] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make several modifications and improvements without departing from the principles of the present invention, and these modifications and improvements should also be considered to fall within the scope of protection of the present invention.

Claims

1. A device for testing recoil, characterized in that: The invention comprises a test bench (1), a strain gauge (2), a support frame (3), a connecting frame (5), a screw (6), a pressure cap (7), a pressure seat (10), a left arc plate (11), a right arc plate (12) and a pressure sensor (13); the strain gauge (2) is attached to the maximum stress point of the test bench (1); the test bench (1) is fixedly connected to the support frame (3); the front end of the support frame (3) is provided with a circular hole for inserting the screw (6), and the rear end is provided with a thread matching the screw (6); the screw (6) is screwed into the support frame (3) from the front end to the rear end; the rear end of the screw (6) is provided with a pressure cap (7), and the end of the pressure cap (7) is in contact with the pressure sensor (13); The connecting frame is a box-type frame structure, wherein a through hole is provided in the middle thereof and passes through the through hole in the front and rear, the pressure seat (10) is provided in the through hole of the connecting frame, and the pressure sensor (13) is fixedly connected to the pressure seat (10); The left circular arc plate (11) and the right circular arc plate (12) are respectively fixed on the left and right sides of the connecting frame, and the left circular arc plate (11) and the right circular arc plate (12) are coaxially arranged; the left circular arc plate (11) and the right circular arc plate (12) are matched with the ear shaft holes on the test bench (1).

2. The device for testing recoil according to claim 1, characterized in that: The connecting frame comprises a pressure-bearing plate (8) and a square steel bracket (9).

3. The device for testing recoil according to claim 2, characterized in that: The pressure bearing plate (8) is a quadrilateral plate material, and a circular hole for inserting the pressure seat (10) is provided in the middle.

4. The device for testing recoil according to claim 3, characterized in that: The two pressure plates (8) are arranged in parallel, and their four corners are fixedly connected by four square steel brackets (9) to form a box-type frame structure.

5. The device for testing recoil according to claim 1, characterized in that: The straight sides of the left arc plate (11) and the right arc plate (12) are arranged forward and the arc sides are arranged backward.

6. The device for testing recoil according to claim 1, characterized in that: The front end of the screw rod (6) is hexagonal, the middle part is a threaded rod, and the rear end is provided with an internal thread.

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