CN110671462A - A composite buffer energy absorption device based on magnetorheological fluid - Google Patents

Abstract

The patent of the present invention discloses a composite buffer energy-absorbing device based on magnetorheological fluid. Nut (5), M8 slotted screw (6), No. 1 magnetorheological fluid buffer (7), small steel ball (8), collision energy-absorbing cavity (9), No. 1 buffer spring (10), spring Connecting plate (11), No. 2 magnetorheological fluid buffer (12), right-angle fixing block (13), M30 bolts (14), No. 3 magnetorheological fluid buffer (15), No. 2 buffer spring (16) , piston valve (17), air compensation chamber (18), buffer outer cylinder (19), sealing ring (20), excitation coil (21), magnetorheological fluid (22). The composite buffer energy absorption device combines the magnetorheological buffer with the multi-particle collision energy absorption device, and can adjust the damping force of the buffer device in real time according to the magnitude of the external impact force, so as to achieve the optimal buffer energy absorption effect.

Description

A composite buffer energy absorption device based on magnetorheological fluid

technical field

The invention belongs to the technical field of buffer energy absorption, and relates to a composite buffer energy absorption device based on a magnetorheological fluid.

Background technique

As one of the main forms of motion, shock is a widespread phenomenon in nature. The purpose of studying shock is to reduce its harmful effects. With the development of engineering equipment towards high-speed and heavy-loading, the impact strength encountered is also increasing. , solving the problem of shock buffering is essential to improve engineering quality. Shock refers to the movement of the system under transient excitation. Its characteristic is that the action time of the excitation is far less than the movement period of the system, and it belongs to a sudden and violent movement. The traditional buffer energy-absorbing device is mainly made of materials such as rubber or spring. The main advantages of this type of buffer device are simple structure and low cost; however, this type of buffer device can only be used for the impact of a specific load, especially in the case of high requirements. Occasionally, the buffer effect will be unsatisfactory, and the application scope will be greatly limited. In view of the shortcomings of traditional buffer materials and buffer energy-absorbing devices, the development of buffer energy-absorbing devices based on new materials provides technical accumulation for the development of buffer technology.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a composite buffer energy-absorbing device based on magnetorheological fluid, which can adjust the damping force of the buffer device in real time according to the size of the external impact force, so as to realize the optimal buffer absorption energy effect.

In order to solve the above-mentioned technical problems, the technical scheme adopted in the present invention is: 1. a composite buffer energy-absorbing device based on magnetorheological fluid, which is composed of a box body, a magnetorheological buffer device and a multi-particle collision energy-absorbing device; It is characterized in that: the said box is composed of a base (1), an outer sleeve (2), a stress plate (3), an M20 hexagon bolt (4), and an M20 hexagon nut (5); the said magnetorheological The buffer device is composed of M8 slotted screw (6), right-angle fixing block (13), M30 bolt (14) and No. 3 magnetorheological fluid buffer (15); the multi-particle collision energy absorption device is composed of a spring Connecting plate (11), M8 slotted screw (6), No. 1 buffer spring (10), No. 2 buffer spring (16), collision energy absorption cavity (9), small steel ball (8), No. 1 magnetic current It is composed of a variable fluid buffer (7) and a No. 2 magnetorheological fluid buffer (12);

Preferably, the base (1) and the outer sleeve (2) are fixedly matched by M20 hexagon bolts (4) and M20 hexagon nuts (5);

Preferably, the outer sleeve (2) cooperates with the base (1) through M20 hexagonal bolts (4) and M20 hexagonal nuts (5) to protect the components in the device;

Preferably, the force-bearing plate (3) and the outer sleeve (2) are in clearance fit to play the role of contacting the buffer;

Preferably, the telescopic rod end of the No. 1 magnetorheological fluid buffer (7) is fixed to the base (1) by an M8 flat-blade screw (4), and the other end is fixed to the collision energy-absorbing cavity (9) by welding ;

Preferably, the small steel balls (8) are placed in the collision energy absorbing cavity (9), and the effect of energy absorption is achieved by the free collision of the small steel balls (8) in the collision energy absorbing cavity (9);

Preferably, the upper end of the No. 1 buffer spring (10) is matched with the spring connecting plate (11) and the M8 flat-head screw (6), and is fixed on the force-bearing plate (3), and the other end of the buffer spring (10) absorbs energy by welding and collision The cavity (9) is matched;

Preferably, the telescopic rod end of the No. 2 magnetorheological fluid buffer (12) is fixed on the force-bearing plate (3) by means of M8 slotted screws (6), and the lower end and the collision energy-absorbing cavity (9) are welded by welding fixed;

Preferably, the lower end of the No. 2 buffer spring (16) is fixed on the base (1) through a spring connecting plate (11) and an M8 slotted screw (6), and the other end is connected to the collision energy absorbing cavity (9). ) by welding;

Preferably, the right-angle fixing block (13) is fixed on the stress plate (3) by means of M8 slotted screws (6);

Preferably, the upper end of the No. 3 magnetorheological fluid buffer (15) is matched with the right-angle fixing block (13) through M30 bolts (14) and nuts, and is fixed with the force plate (3), and the lower end is through M8 slotted screws (6) and the gasket and the base (1) are fixed;

Preferably, the No. 3 magnetorheological buffer (15) is composed of a piston valve (17), an air compensation chamber (18), a buffer outer cylinder (19), a sealing ring (20), an excitation coil (21) and The magnetorheological fluid (22) is the main output source of the controllable damping force of the device.

The beneficial effect of the present invention is that the present invention provides that the intensity of the magnetic field is adjusted based on changing the current of the excitation coil, thereby controlling the magnitude of the output damping force of the magnetorheological damper; a multi-particle collision device is adopted, and the collision suction is carried out by the small steel balls (8). The rigid collision of the energy cavity (7) can achieve the effect of energy absorption; the combination of the two devices in parallel can provide an adjustable damping force during the collision and absorb the energy generated during the collision, so the vibration reduction effect is more ideal.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the overall structure schematic diagram of the composite buffer energy-absorbing device;

Figure 2 is a top view of the composite buffer energy-absorbing device;

Fig. 3 is the A-A sectional view of the composite buffer energy-absorbing device;

Fig. 4 is the structural representation of No. 3 magnetorheological fluid buffer in the present invention;

In the picture: 1. Base, 2. Outer sleeve, 3. Force plate, 4.M20 hexagon bolt, 5.M20 hexagon nut, 6.M8 slotted screw, No. 7.1 magnetorheological fluid buffer, 8. Small Steel ball, 9. Collision energy absorption cavity, No. 10.1 buffer spring, 11. Spring connecting plate, No. 12.2 magnetorheological fluid buffer, 13. Right angle fixing block, 14.M30 bolt, No. 15.3 magnetorheological fluid buffer , No. 16.2 buffer spring, 17. Piston valve, 18. Air compensation chamber, 19. Buffer outer cylinder, 20. Seal ring, 21. Excitation coil, 22. Magnetorheological fluid.

Detailed ways

A composite buffer energy-absorbing device based on magnetorheological fluid, which is composed of a box body, a magnetorheological buffer device and a multi-particle collision energy-absorbing device; it is characterized in that: the box body is composed of a base (1), an outer The sleeve (2), the force plate (3), the M20 hexagonal bolt (4), and the M20 hexagonal nut (5) are composed; 13), M30 bolt (14) and No. 3 magnetorheological fluid buffer (15); the multi-particle collision energy absorption device is composed of a spring connecting plate (11), M8 slotted screw (6), No. 1 Buffer spring (10), No. 2 buffer spring (16), collision energy absorption cavity (9), small steel ball (8), No. 1 magnetorheological fluid buffer (7) and No. 2 magnetorheological fluid buffer (12) Composition;

Preferably, the base (1) and the outer sleeve (2) are fixedly matched by M20 hexagon bolts (4) and M20 hexagon nuts (5);

Preferably, the outer sleeve (2) cooperates with the base (1) through M20 hexagonal bolts (4) and M20 hexagonal nuts (5) to protect the components in the device;

Preferably, the force-bearing plate (3) and the outer sleeve (2) are in clearance fit to play the role of contacting the buffer;

Preferably, the telescopic rod end of the No. 1 magnetorheological fluid buffer (7) is fixed to the base (1) by an M8 flat-blade screw (4), and the other end is fixed to the collision energy-absorbing cavity (9) by welding ;

Preferably, the small steel balls (8) are placed in the collision energy absorbing cavity (9), and the effect of energy absorption is achieved by the free collision of the small steel balls (8) in the collision energy absorbing cavity (9);

Preferably, the upper end of the No. 1 buffer spring (10) is matched with the spring connecting plate (11) and the M8 flat-head screw (6), and is fixed on the force-bearing plate (3), and the other end of the buffer spring (10) absorbs energy by welding and collision The cavity (9) is matched;

Preferably, the telescopic rod end of the No. 2 magnetorheological fluid buffer (12) is fixed on the force-bearing plate (3) by means of M8 slotted screws (6), and the lower end and the collision energy-absorbing cavity (9) are welded by welding fixed;

Preferably, the lower end of the No. 2 buffer spring (16) is fixed on the base (1) through a spring connecting plate (11) and an M8 slotted screw (6), and the other end is connected to the collision energy absorbing cavity (9). ) by welding;

Preferably, the right-angle fixing block (13) is fixed on the stress plate (3) by means of M8 slotted screws (6);

Preferably, the upper end of the No. 3 magnetorheological fluid buffer (15) is matched with the right-angle fixing block (13) through M30 bolts (14) and nuts, and is fixed with the force plate (3), and the lower end is through M8 slotted screws (6) and the gasket and the base (1) are fixed;

Preferably, the No. 3 magnetorheological buffer (15) is composed of a piston valve (17), an air compensation chamber (18), a buffer outer cylinder (19), a sealing ring (20), an excitation coil (21) and The magnetorheological fluid (22) is the main output source of the controllable damping force of the device.

The specific working principle and implementation process of the present invention are as follows: the device is installed below the required buffer, and when the force-bearing plate (3) of the device is impacted, the No. 1 buffer spring (10) and No. 2 buffer spring (16) ) is compressed to provide a buffer effect and store external energy; at the same time, the magnetorheological fluid buffer No. 1 (7), the magnetorheological fluid buffer No. 2 (12) and the magnetorheological fluid buffer No. The excitation coil is energized to generate a magnetic field, and the magnetorheological fluid in it generates a real-time adjustable yield stress, which provides a controllable damping force for the device; it collides with the rigid ball (8) in the energy-absorbing cavity (9) and the cavity When a collision occurs, the energy generated when the device is impacted is absorbed; the present invention can adjust the magnitude of the current according to the magnitude of the external impact force, so that the excitation coil generates magnetic fields of different sizes, thereby controlling the magnitude of the damping force of the magnetorheological buffer device, At the same time, it is matched with the collision energy absorbing device of the rigid ball (8), so as to realize the optimal buffering energy absorbing effect.

In the present invention, specific examples are used to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; There will be changes in the specific implementation manner and application scope of the idea of the invention. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (1)

1. A composite buffering energy-absorbing device based on magnetorheological fluid comprises a box body, the magnetorheological buffering device and a multi-particle collision energy-absorbing device; the method is characterized in that: the box body consists of a base (1), an outer sleeve (2), a stress plate (3), an M20 hexagon bolt (4) and an M20 hexagon nut (5); the magnetorheological buffering device consists of an M8 straight screw (6), a right-angle fixing block (13), an M30 bolt (14) and a No. 3 magnetorheological buffer (15); the multi-particle collision energy absorption device consists of a spring connecting plate (11), an M8 straight screw (6), a No. 1 buffer spring (10), a No. 2 buffer spring (16), a collision energy absorption cavity (9), a small steel ball (8), a No. 1 magnetorheological fluid buffer (7) and a No. 2 magnetorheological fluid buffer (12); preferably, the base (1) and the outer sleeve (2) are fixedly matched through an M20 hexagon bolt (4) and an M20 hexagon nut (5); preferably, the outer sleeve (2) is matched with the base (1) through an M20 hexagon bolt (4) and an M20 hexagon nut (5) to protect parts in the device; preferably, the stress plate (3) is in clearance fit with the outer sleeve (2) and is in contact with the buffer; preferably, the telescopic rod end of the No. 1 magnetorheological fluid buffer (7) is fixed with the base (1) through an M8 straight screw (4), and the other end of the buffer is fixed with the collision energy-absorbing cavity (9) through welding; preferably, the small steel ball (8) is placed in the collision energy-absorbing cavity (9), and the energy-absorbing effect is achieved through the free collision of the small steel ball (8) in the collision energy-absorbing cavity (9); preferably, the upper end of the No. 1 buffer spring (10) is matched with an M8 straight-line screw (6) through a spring connecting plate (11) and is fixed on the stress plate (3), and the other end of the buffer spring is matched with the collision energy-absorbing cavity (9) through welding; preferably, the telescopic rod end of the No. 2 magnetorheological fluid buffer (12) is fixed on the stress plate (3) through an M8 straight-line screw (6), and the lower end of the buffer is fixed with the collision energy-absorbing cavity (9) through welding; preferably, the lower end of the No. 2 buffer spring (16) is matched with an M8 straight-line screw (6) through a spring connecting plate (11) and is fixed on the base (1), and the other end of the buffer spring is matched with the collision energy-absorbing cavity (9) through welding; preferably, the right-angle fixing block (13) is fixed on the stress plate (3) through an M8 straight-line screw (6); preferably, the upper end of the No. 3 magnetorheological fluid buffer (15) is matched with the right-angle fixed block (13) through an M30 bolt (14) and a nut and is fixed with the stress plate (3), and the lower end of the No. 3 magnetorheological fluid buffer is fixed with the base (1) through an M8 straight-line screw (6) and a gasket; preferably, the No. 3 magnetorheological buffer (15) consists of a piston valve (17), an air compensation cavity (18), a buffer outer cylinder (19), a sealing ring (20), an excitation coil (21) and magnetorheological fluid (22), and is a main controllable damping force output source of the device.

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