Magnetorheological recoil machine for artillery

Abstract

The utility model discloses a magneto-rheological recoil machine for artillery. The magneto-rheological recoil machine comprises an outer cylinder with a channel; the inner cylinder is arranged in the outer cylinder and is provided with a cavity; the piston is arranged in the inner cylinder; the first magneto-rheological valve is positioned at one end of the magneto-rheological recoil machine and is mounted between the outer barrel and the inner barrel; the second magneto-rheological valve is arranged at one end of the magneto-rheological recoil machine and is arranged between the outer cylinder and the inner cylinder; the magnetorheological fluid is filled in a channel between the inner cylinder and the first magnetorheological valve and a channel between the inner cylinder and the second magnetorheological valve; wherein the first magneto-rheological valve and the second magneto-rheological valve are respectively connected with the channel; and the channel is communicated with the cavity of the inner cylinder.

Description

Technical Field

[0001] This utility model relates to a recoil mechanism for artillery, and in particular to a magnetorheological recoil mechanism for artillery. Background Technology

[0002] The high chamber pressure, large recoil, and demanding chassis requirements of our main battle vehicles result in a trade-off between high mobility and firepower. Within the entire weapon system, the recoil mechanism is one of the core subsystems, directly affecting the force exerted, thus influencing the weight of the entire system and its firing stability.

[0003] The recoil mechanism is an important component of the anti-recoil device. Existing recoil mechanisms are a type of hydraulic buffer device. The controller achieves the buffering effect by controlling the hydraulic oil flowing through the hydraulic cylinder channel. However, the control accuracy of the hydraulic oil flow is poor and the response speed is slow.

[0004] Conventional hydraulic recoil mechanisms are passive hydraulic systems, and the recoil resistance they generate cannot be adjusted according to different firing conditions. The recoil energy generated during firing depends on various factors, including the type of projectile, propellant charge, firing angle, and atmospheric temperature. Generally, the design of conventional hydraulic recoil mechanisms focuses on ensuring that the determined structure can dissipate the estimated maximum recoil energy. Although a conventional hydraulic recoil mechanism can generate an ideal trapezoidal recoil force for a given firing condition, the resulting recoil resistance will exhibit different characteristics when firing conditions change, leading to poor stability. Summary of the Invention

[0005] The purpose of this invention is to provide a magnetorheological retraction mechanism for artillery, which improves the response speed by utilizing magnetorheological fluid installed in the magnetorheological retraction mechanism.

[0006] This utility model discloses a magnetorheological retraction mechanism for artillery, comprising:

[0007] Outer cylinder with channels;

[0008] An inner cylinder with a cavity installed inside an outer cylinder;

[0009] A piston installed in the inner cylinder;

[0010] The first magnetorheological valve is located at one end of the magnetorheological retraction machine and installed between the outer cylinder and the inner cylinder;

[0011] A second magnetorheological valve is installed at one end of the magnetorheological retraction machine and between the outer and inner cylinders;

[0012] Magnetorheological fluid is loaded into the inner cylinder and the channels of the first magnetorheological valve and the second magnetorheological valve;

[0013] The first magnetorheological valve and the second magnetorheological valve are respectively connected to the channel; the channel is in communication with the cavity of the inner cylinder.

[0014] Preferably, both the first magnetorheological valve and the second magnetorheological valve include a coil and a U-shaped iron core.

[0015] Preferably, the U-shaped iron core is installed between the outer cylinder and the inner cylinder, and together with the inner cylinder wall, forms a gap for the flow of magnetorheological fluid.

[0016] Preferably, the magnetorheological retraction mechanism further includes a retraction rod fixedly connected to the piston.

[0017] This invention possesses all the advantages of magnetorheological fluid; compared with conventional hydraulic recoil devices, it has a faster response time and better stability. Attached Figure Description

[0018] Figure 1 a is a schematic diagram of ferromagnetic particles in a magnetorheological fluid freely dispersed in a carrier fluid when there is no magnetic field.

[0019] Figure 1 b is a schematic diagram showing how suspended particles in a magnetorheological liquid are polarized and form a chain-like columnar structure parallel to the magnetic field when a strong magnetic field is applied.

[0020] Figure 2 This is a schematic diagram of the structure of the magnetorheological retraction mechanism for artillery of this utility model;

[0021] Figure 3 This is a schematic diagram of the principle of the magnetorheological valve of this utility model. Detailed Implementation

[0022] Magnetorheological fluids are smart materials, a type of controllable fluid discovered by Rabinow in the United States in 1948, and have seen rapid development since the 1990s. They consist of ferromagnetic particles with high saturation magnetic induction, a non-magnetic carrier liquid, and stabilizers that improve the sedimentation and coagulation stability of the magnetorheological fluid. In the absence of a magnetic field, the ferromagnetic particles are freely dispersed in the carrier liquid, exhibiting the characteristics of a Newtonian fluid. (See also...) Figure 1 a; When a strong magnetic field is applied, the suspended particles in the magnetorheological fluid are polarized, forming a chain-like columnar structure parallel to the magnetic field. It transforms from a readily flowing Newtonian fluid to a non-Newtonian fluid with a certain shear yield strength in a very short time (milliseconds), exhibiting viscous properties. That is, the viscosity of the liquid changes steplessly with the magnetic field, and this transformation is continuous, low-power, reversible, rapid, and easily controlled. See [link to relevant documentation]. Figure 1 b.

[0023] In recent years, researchers have fabricated magnetorheological dampers, reducers, clutches, and other devices, and conducted in-depth research in areas such as fluid sealing, magnetorheological fluid polishing, and magnetorheological fixtures. Magnetorheological fluid devices have fundamentally changed the design and operation of electromechanical devices. Therefore, magnetorheological fluid devices can provide a simple, quiet, and fast-responding intermediate between electrical control and mechanical systems.

[0024] The performance characteristics of magnetorheological fluids are: good precipitation stability, easy redispersibility, high dynamic yield stress, low zero-field viscosity, fast response time, and wide operating temperature range.

[0025] This invention applies magnetorheological fluid to the recoil mechanism of artillery, thereby constructing a magnetorheological fluid recoil mechanism for artillery.

[0026] This utility model relates to a magnetorheological fluid recoil mechanism for artillery, comprising: an outer cylinder 1 with a channel 8; an inner cylinder 2 installed inside the outer cylinder 1; a piston 3 with a cavity installed in the inner cylinder 2; a first magnetorheological valve 4 located at one end of the magnetorheological recoil mechanism and installed between the outer cylinder 1 and the inner cylinder 2; a second magnetorheological valve 5 installed at one end of the magnetorheological recoil mechanism and installed between the outer cylinder 1 and the inner cylinder 2; and a magnetorheological fluid loaded into the channel 8 between the inner cylinder 2 and the first magnetorheological valve 4 and the second magnetorheological valve 5; wherein the first magnetorheological valve 4 and the second magnetorheological valve 5 are respectively connected to the channel 8; and the channel 8 communicates with the cavity of the inner cylinder.

[0027] The magnetorheological retraction machine of this invention adopts a double-cylinder structure including an outer cylinder 1 and an inner cylinder 2, and has two magnetorheological valves 4 and 5. Each magnetorheological valve is independent of the inner and outer cylinders and has a simple cylindrical shape, which is convenient for installation.

[0028] Because this invention features two magnetorheological valves at both ends of the double-cylinder structure, the space occupied by the magnetorheological valves is reduced, while the length of the magnetic field activation region is increased. The two magnetorheological valves have two coils connected in parallel, which shortens the response time delay of the magnetorheological retraction mechanism. At the right end of the magnetorheological retraction mechanism, there is a temperature compensation chamber 6 including a spring 7, used to compensate for changes in the chamber's volume caused by the piston rod and temperature rise.

[0029] Figure 3 The first magnetorheological valve 4 of this invention is shown. It should be noted that the structure of the second magnetorheological valve 5 of this invention is exactly the same as that of the first magnetorheological valve 4.

[0030] The first magnetorheological valve 4 includes a coil 41 and a U-shaped iron core 42. The U-shaped iron core 42 is installed between the outer cylinder 1 and the inner cylinder 2, and the opening of the U-shaped iron core 42 and the wall of the inner cylinder 2 together form a gap 44 for the flow of magnetorheological fluid.

[0031] When current is applied to coil 41, the generated magnetic field will "magnetize" the magnetorheological fluid in the gap 44 of the magnetorheological valve. The ferromagnetic particles in the magnetorheological fluid form a chain structure, thereby generating different damping forces under different currents. Figure 3 The mark 43 represents the magnetic flux path, the green arrow represents the magnetic flux, and the blue arrow represents the flow of the magnetorheological fluid.

[0032] In addition, the magnetorheological retraction mechanism also includes a retraction rod 9 fixedly connected to the piston 3.

[0033] This invention relates to a magnetorheological damping device that enables effective control of recoil resistance and recoil length. Compared to conventional hydraulic recoil devices, the magnetorheological damping device is a semi-active, controllable hydraulic resistance device. It can rapidly and reversibly change the rheological properties of the magnetorheological fluid by altering the magnetic field generated by the electromagnetic coil within the device with a small current, depending on the firing conditions. This allows for effective control of recoil resistance, producing the desired recoil resistance. Therefore, the magnetorheological damping device not only adapts to various firing conditions but also provides smoother changes in recoil resistance. This is of significant value in reducing the amplitude of forces acting on the gun mount, improving the reliability of the mechanism, reducing system weight, minimizing firing vibration, enhancing firing stability and accuracy, and reducing structural dimensions.

[0034] Although the present invention has been described in detail above, it is not limited thereto. Those skilled in the art can make various modifications based on the principles of the present invention. Therefore, all modifications made in accordance with the principles of the present invention should be understood as falling within the protection scope of the present invention.

Claims

1. A magnetorheological retraction mechanism for artillery, characterized in that... include: Outer cylinder (1) with channel (8); An inner cylinder (2) with a cavity is installed inside the outer cylinder (1); Piston (3) installed in inner cylinder (2); The first magnetorheological valve (4) is located at one end of the magnetorheological retraction machine and installed between the outer cylinder (1) and the inner cylinder (2); A second magnetorheological valve (5) is installed at one end of the magnetorheological retraction machine and between the outer cylinder (1) and the inner cylinder (2); Magnetorheological fluid is loaded into the inner cylinder (2) and the channels (8) of the first magnetorheological valve (4) and the second magnetorheological valve (5); The first magnetorheological valve (4) and the second magnetorheological valve (5) are respectively connected to the channel (8); the channel (8) is connected to the cavity of the inner cylinder (2).

2. The magnetorheological retraction mechanism for artillery according to claim 1, characterized in that, Both the first magnetorheological valve and the second magnetorheological valve include a coil and a U-shaped iron core.

3. The magnetorheological retraction mechanism for artillery according to claim 2, characterized in that, The U-shaped iron core is installed between the outer cylinder and the inner cylinder, and together with the inner cylinder wall, forms a gap for the flow of magnetorheological fluid.

4. The magnetorheological retraction mechanism for artillery according to claim 2, characterized in that, It also includes a retraction rod (9) that is fixedly connected to the piston (3).

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