Anti-caking and anti-settling structure of double-cylinder type double-fluid magnetorheological fluid shock absorber

Abstract

The utility model discloses an anti-caking and anti-settling structure of a double-cylinder type double-fluid magnetorheological fluid shock absorber, and particularly relates to the field of magnetorheological shock absorbers, the anti-caking and anti-settling structure comprises a shock absorber outer cylinder and a gas cylinder, a lower mounting base is arranged at the bottom of the shock absorber outer cylinder, and a lower supporting cover is fixedly connected to the lower mounting base; a shock absorber inner cylinder is fixedly installed in the shock absorber outer cylinder, an electromagnetic coil piston is arranged in the shock absorber inner cylinder, the side face of the gas cylinder is connected with a first pipeline, and the top of the gas cylinder is connected with a second pipeline. Due to the arrangement of the gas cylinder and the first pipeline, the volume of the piston rod entering the magnetorheological fluid is increased, part of the magnetorheological fluid can flow into the gas cylinder through the first pipeline, the magnetorheological fluid flows, the purpose of preventing the magnetorheological fluid from being agglomerated can be achieved, the uniformity of the magnetorheological fluid can be effectively kept, and the service life of the magnetorheological fluid is prolonged. Particles are prevented from being precipitated in a static state, the service life of liquid is prolonged, and it is ensured that the liquid always keeps consistent performance in the using process.

Description

Technical Field

[0001] This utility model relates to the field of magnetorheological vibration dampers, and more specifically, to a structure for preventing settling in a double-fluid magnetorheological fluid vibration damper. Background Technology

[0002] Magnetorheological dampers utilize electromagnetic reactions, based on input information from sensors monitoring the vehicle body and wheel motion, to respond in real time to road conditions and the driving environment. Magnetorheological fluid is a magnetic soft-particle suspension. When the fluid is injected into an electromagnetic coil within the damper piston, the coil's magnetic field alters its rheological properties, generating a rapidly responsive and highly controllable damping force without electromechanical control valves and with a simple mechanical device. It can respond to changes in external conditions within milliseconds, adjusting damping characteristics in real time to adapt to different driving environments and needs, thus providing better comfort and safety. By adjusting the magnetic field strength, the fluid viscosity can be flexibly controlled to achieve different damping effects. Suitable for various road conditions and usage scenarios, such as highways and urban roads, it effectively reduces vehicle vibration during driving, improves driving stability and comfort, reduces passenger fatigue, enhances vehicle handling stability, and improves driving safety.

[0003] Traditional shock absorbers have an internal air chamber at the bottom, where the magnetorheological fluid cannot flow. Over prolonged periods of stillness, the magnetorheological fluid inside the shock absorber will experience sedimentation and agglomeration, leading to uneven fluid composition, altering its physical and flow properties, and thus affecting vibration damping, control, and response capabilities. Furthermore, the formation of sediment reduces the viscosity of the magnetorheological fluid, decreasing its rapid response under the influence of a current-controlled magnetic field, impacting the overall system efficiency and control accuracy. To address this issue, those skilled in the art need to develop a dual-fluid, double-cylinder magnetorheological fluid shock absorber with an anti-agglomeration and sedimentation structure. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide a double-cylinder dual-fluid magnetorheological fluid shock absorber anti-agglomeration and settling structure. By setting up a gas cylinder and a No. 1 pipe, the magnetorheological fluid in the inner cylinder flows into the gas cylinder, preventing the settling and agglomeration phenomenon, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-fluid magnetorheological fluid shock absorber anti-agglomeration and settlement structure, comprising an outer cylinder of the shock absorber and a gas cylinder. A lower mounting base is provided at the bottom of the outer cylinder, and a lower cover is fixedly connected to the lower mounting base. An inner cylinder of the shock absorber is fixedly installed inside the outer cylinder. An electromagnetic coil piston is installed inside the inner cylinder. A first pipe is connected to the side of the gas cylinder, and one end of the first pipe is connected to the bottom of the inner cylinder. A second pipe is connected to the top of the gas cylinder, and one end of the second pipe is connected to the outer cylinder. A piston rod passes through the inner cylinder, and one end of the piston rod is fixedly connected to the center of the electromagnetic coil piston. A wire harness passes through the piston rod and is electrically connected to the electromagnetic coil piston. A guide assembly is provided inside the outer cylinder, and an upper sealing assembly mounting seat is provided on the inner cylinder.

[0006] In a preferred embodiment, the gas cylinder is provided with an air bladder inside, and an upper isolation diaphragm is provided inside the gas cylinder, with the upper isolation diaphragm located above the air bladder.

[0007] In a preferred embodiment, the guide assembly includes a magnetorheological damper oil seal isolation assembly, which is fixedly installed inside the outer cylinder of the damper, and the top of the inner cylinder of the damper is connected to the magnetorheological damper oil seal isolation assembly, with the piston rod passing through the inside of the magnetorheological damper oil seal isolation assembly.

[0008] In a preferred embodiment, the space between the inner cylinder of the shock absorber, the electromagnetic coil piston, and the first pipe is filled with magnetorheological fluid, while the remaining space inside the outer cylinder of the shock absorber, the second pipe, and the gas cylinder is filled with shock absorber oil.

[0009] In a preferred embodiment, the outer cylinder of the shock absorber is provided with a shock-absorbing oil sealing assembly and a dust seal, and the shock-absorbing oil sealing assembly is located below the dust seal. A guide sleeve piston rod is fixedly installed inside the shock-absorbing oil sealing assembly, passing through the shock-absorbing oil sealing assembly and the dust seal.

[0010] In a preferred embodiment, the top of the gas cylinder is provided with a shock-absorbing oil filling port, the side of the gas cylinder is provided with an air filling port, and the bottom of the gas cylinder is provided with a magnetorheological fluid filling port.

[0011] In a preferred embodiment, a turbulence valve is provided inside the gas cylinder, and the turbulence valve is located below the gas bladder. The turbulence valve is inverted conical in shape, and the top of the turbulence valve is provided with an array of holes.

[0012] The technical effects and advantages of this utility model are as follows:

[0013] This invention, by incorporating a gas cylinder and a primary pipeline, increases the volume of the magnetorheological fluid that the piston rod can penetrate. Through the primary pipeline, some of the magnetorheological fluid flows into the gas cylinder, thus preventing sedimentation and agglomeration. This effectively maintains the uniformity of the magnetorheological fluid, avoids particle sedimentation and agglomeration in a static state, extends the fluid's lifespan, and ensures consistent performance throughout use. It also improves system response speed and control precision, allowing for rapid adjustment of its flow properties under the influence of a current-controlled magnetic field, thereby enhancing the overall efficiency of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the outer cylinder structure of the shock absorber of this utility model;

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0017] The attached diagram is labeled as follows: 1. Shock absorber outer cylinder; 2. Shock absorber inner cylinder; 3. Lower mounting base; 4. Lower cover; 5. Electromagnetic coil piston; 6. Piston rod; 7. Magnetorheological shock absorber oil seal isolation assembly; 8. Guide sleeve; 9. Shock absorber oil seal assembly; 10. Dust seal; 11. Wiring harness; 12. Gas cylinder; 13. Air bladder; 14. Upper isolation diaphragm; 15. Pipeline No. 1; 16. Pipeline No. 2; 17. Shock absorber oil filling port; 18. Air inlet; 19. Magnetorheological fluid filling port; 20. Turbulence valve plate; 21. Upper sealing assembly mounting base. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Refer to the instruction manual appendix Figure 1-3This utility model discloses a double-fluid magnetorheological fluid shock absorber structure for preventing settling and condensation. It includes an outer cylinder 1 and a gas cylinder 12. A lower mounting base 3 is located at the bottom of the outer cylinder 1, and a lower cover 4 is fixedly connected to the lower mounting base 3. A sealing ring for sealing is also provided on the lower mounting base 3. An inner cylinder 2 is fixedly installed inside the outer cylinder 1, and an electromagnetic coil piston 5 is installed inside the inner cylinder 2. A first pipe 15 is connected to the side of the gas cylinder 12, with one end of the first pipe 15 connected to the bottom of the inner cylinder 2. A second pipe 16 is connected to the top of the gas cylinder 12, with one end of the second pipe 16 connected to the outer cylinder 1. A piston passes through the inner cylinder 2. The piston rod 6 is fixedly connected at one end to the center of the electromagnetic coil piston 5. A wire harness 11 is threaded through the piston rod 6 and electrically connected to the electromagnetic coil piston 5. A guide assembly is provided inside the outer cylinder 1 of the shock absorber. The outer cylinder 1 of the shock absorber provides installation space for the inner cylinder 2 of the shock absorber. An upper sealing assembly mounting seat 21 is provided on the inner cylinder 2 of the shock absorber. A sealing ring is provided on the upper sealing assembly mounting seat 21 to prevent liquid leakage. When the anti-settlement structure of the double-cylinder dual-fluid magnetorheological fluid shock absorber is working, the electromagnetic coil piston 5 is first activated to cause the magnetorheological fluid inside the inner cylinder 2 of the shock absorber to generate rheological characteristics and fluid resistance, so that the magnetorheological fluid generates sufficient damping force. For vibration damping, if the anti-sedimentation structure of the dual-fluid magnetorheological fluid damper is under pressure, the reciprocating motion of the piston rod 6 and the electromagnetic coil piston 5 will cause volumetric displacement. The magnetorheological fluid, generating sufficient damping force, will then release the pressure, achieving the vibration damping effect. When the piston rod 6 transmits vibration into the interior of the magnetorheological fluid damper, the volume of the piston rod 6 inside the magnetorheological fluid increases. Through pipe 15, some of the magnetorheological fluid will flow into the gas cylinder 12, causing the magnetorheological fluid to flow. This effectively prevents sedimentation of the magnetorheological fluid, maintaining its uniformity and preventing particle sedimentation in a static state, thus extending the service life of the liquid. Ensuring consistent performance throughout use improves system response speed and control precision. It also ensures rapid adjustment of the fluid's flow properties under the influence of the current-controlled magnetic field within the shock absorber, enhancing overall equipment efficiency. After the magnetorheological fluid flows into the gas cylinder 12, it is compressed by the air bladder 13, causing the nitrogen gas inside to deform and compress. The upper isolation diaphragm 14 then compresses the damping oil, which in turn compresses the oil seal, improving its pressure resistance and sealing effect. When the piston rod 6 disengages from the magnetorheological fluid shock absorber, the gas cylinder 12 and the nitrogen gas inside return to their original positions. The air bladder 13 then pushes the magnetorheological fluid to return to its original state, ready for the next operation.

[0020] In this embodiment, an air bladder 13 is provided inside the gas cylinder 12, and an upper isolation diaphragm 14 is also provided inside the gas cylinder 12, with the upper isolation diaphragm 14 positioned above the air bladder 13. The gas cylinder 12 provides installation space for the air bladder 13 and the upper isolation diaphragm 14. When the piston rod 6 moves downward under pressure, it compresses the magnetorheological fluid through the electromagnetic coil piston. This fluid then flows into the gas cylinder 12 through the first pipe 15, pushing the air bladder 13 to compress, thereby compressing the nitrogen gas inside the gas cylinder 12. When the pressure on the piston rod 6 is no longer applied, the nitrogen gas returns to its original position. This will push the airbag 13 to squeeze the magnetorheological fluid to reset, which in turn will reset the piston rod 6. Alternatively, the airbag 13 can be replaced with a floating piston. The floating piston is located at the bottom of the inner wall of the gas cylinder 12, separating the nitrogen inside the gas cylinder 12 from the magnetorheological fluid that enters the gas cylinder 12. After the magnetorheological fluid enters the gas cylinder 12, it pushes the floating piston to move. When the floating piston moves upward, it can also compress the nitrogen. The airbag 13 has little impact on the magnetorheological fluid particles. The upper isolation diaphragm 14 can also be replaced with a floating piston. It can be replaced and used according to actual needs.

[0021] In this embodiment, the guiding component includes a magnetorheological damper oil seal isolation component 7. The magnetorheological damper oil seal isolation component 7 is fixedly installed inside the outer cylinder 1 of the damper, and the top end of the inner cylinder 2 of the damper is connected to the magnetorheological damper oil seal isolation component 7. The piston rod 6 passes through the inside of the magnetorheological damper oil seal isolation component 7. When the piston rod 6 moves, the magnetorheological damper oil seal isolation component 7 guides the piston rod 6, so that the piston rod 6 moves smoothly, and at the same time, it can scrape off the adsorbed material on the piston rod 6.

[0022] In this embodiment, a turbulence valve plate 20 is provided inside the gas cylinder 12, and the turbulence valve plate 20 is located below the air bladder 13. The turbulence valve plate 20 is inverted conical in shape, and the top of the turbulence valve plate 20 is provided with an array of holes. After the magnetorheological fluid flows into the gas cylinder 12, the magnetorheological fluid will flow into the turbulence valve plate 20. Through the holes provided at the top of the turbulence valve plate 20, the magnetorheological fluid will be dispersed and will not directly impact the bottom of the air bladder 13. By circumferentially squeezing the bottom of the air bladder 13, the working life of the air bladder 13 can be extended and abnormal deformation can be avoided. At the same time, the magnetorheological fluid can be further dispersed to avoid sedimentation and agglomeration.

[0023] In this embodiment, the space between the inner cylinder 2 of the shock absorber, the electromagnetic coil piston 5, and the first pipe 15 is filled with magnetorheological fluid. The remaining space inside the outer cylinder 1 of the shock absorber, the second pipe 16, and the gas cylinder 12 is filled with shock absorber oil. The outer cylinder 1 of the shock absorber is equipped with a shock absorber oil sealing assembly 9 and a dust seal 10, with the shock absorber oil sealing assembly 9 located below the dust seal 10. A guide sleeve 8 is fixedly installed inside the shock absorber oil sealing assembly 9. The piston rod 6 passes through the shock absorber oil sealing assembly 9 and the dust seal 10. The top of the gas cylinder 12 is provided with a shock absorber oil filling port 17, the side of the gas cylinder 12 is provided with an air filling port 18, and the bottom of the gas cylinder 12 is provided with a magnetorheological fluid filling port 19. The shock absorber oil filling port 17 facilitates the addition of shock absorber oil to the outer cylinder 1 of the shock absorber, the air filling port 18 facilitates the addition of nitrogen to the gas cylinder 12, and the magnetorheological fluid filling port 19 facilitates the addition of magnetorheological fluid. The guide sleeve 8 is used to guide the piston rod 6.

[0024] It should be noted that, in the operation of the anti-agglomeration and settling structure of the dual-fluid magnetorheological fluid shock absorber, the electromagnetic coil piston 5 first activates, causing the magnetorheological fluid inside the inner cylinder 2 of the shock absorber to exhibit rheological properties and generate fluid resistance. This results in sufficient damping force from the magnetorheological fluid for shock absorption. If the anti-agglomeration and settling structure of the dual-fluid magnetorheological fluid shock absorber is subjected to pressure, the reciprocating motion of the piston rod 6 and the electromagnetic coil piston 5 leads to volumetric displacement. This is absorbed and depressurized by the magnetorheological fluid, achieving the shock absorption effect. When the piston rod 6 transmits vibration into the interior of the magnetorheological fluid shock absorber, the volume of the piston rod 6 inside the magnetorheological fluid increases. Through the first pipe 15, some of the magnetorheological fluid flows into the gas cylinder 12, causing the magnetorheological fluid to flow and thus preventing settling and agglomeration. The purpose of this phenomenon is to effectively maintain the uniformity of the magnetorheological fluid, prevent particle sedimentation in a static state, thereby extending the service life of the fluid and ensuring consistent performance during use. It can improve the system's response speed and control accuracy, ensure that its flow properties can be quickly adjusted under the action of a current-controlled magnetic field, and improve the overall working efficiency of the equipment. After the magnetorheological fluid flows into the gas cylinder 12, it will then squeeze the nitrogen inside the gas cylinder 12 through the air bladder 13, causing the nitrogen to deform and compress. The upper isolation diaphragm 14 will squeeze the damping oil, which in turn will squeeze the oil seal, improving the pressure resistance and sealing effect of the oil seal. When the piston rod 6 disengages from the inside of the magnetorheological fluid damper, the gas cylinder 12 and the nitrogen inside will return to their original state. The air bladder 13 will push the magnetorheological fluid to return to its original state, ready for the next operation.

[0025] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0026] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0027] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-fluid magnetorheological fluid shock absorber structure for preventing settling, comprising an outer cylinder (1) and a gas cylinder (12), characterized in that: The bottom of the outer cylinder (1) of the shock absorber is provided with a lower mounting base (3), and a lower cover (4) is fixedly connected to the lower mounting base (3). The inner cylinder (2) of the shock absorber is fixedly installed inside the outer cylinder (1). An electromagnetic coil piston (5) is provided inside the inner cylinder (2). A first pipe (15) is connected to the side of the gas cylinder (12), and one end of the first pipe (15) is connected to the bottom of the inner cylinder (2). A second pipe (1) is connected to the top of the gas cylinder (12). 6), and one end of the second pipe (16) is connected to the outer cylinder (1) of the shock absorber. A piston rod (6) is installed inside the inner cylinder (2) of the shock absorber, and one end of the piston rod (6) is fixedly connected to the center position of the electromagnetic coil piston (5). A wire harness (11) is installed inside the piston rod (6), and the wire harness (11) is electrically connected to the electromagnetic coil piston (5). A guide assembly is provided inside the outer cylinder (1) of the shock absorber, and an upper sealing assembly mounting seat (21) is provided on the inner cylinder (2) of the shock absorber.

2. The anti-settlement structure of the double-fluid magnetorheological fluid damper according to claim 1, characterized in that: The gas cylinder (12) is provided with an air bag (13) inside, and an upper isolation diaphragm (14) is provided inside the gas cylinder (12), with the upper isolation diaphragm (14) located above the air bag (13).

3. The anti-settlement structure of the double-fluid magnetorheological fluid damper according to claim 2, characterized in that: The guiding assembly includes a magnetorheological damper oil seal isolation assembly (7), which is fixedly installed inside the outer cylinder (1) of the damper, and the top of the inner cylinder (2) of the damper is connected to the magnetorheological damper oil seal isolation assembly (7). The piston rod (6) passes through the inside of the magnetorheological damper oil seal isolation assembly (7).

4. The anti-settlement structure of the double-fluid magnetorheological fluid damper according to claim 3, characterized in that: The space between the inner cylinder (2) of the shock absorber, the electromagnetic coil piston (5) and the first pipe (15) is filled with magnetorheological fluid, and the remaining space inside the outer cylinder (1), the second pipe (16) and the gas cylinder (12) of the shock absorber is filled with shock absorber oil.

5. The anti-settlement structure of the double-fluid magnetorheological fluid damper according to claim 1, characterized in that: The shock absorber outer cylinder (1) is provided with a shock-absorbing oil sealing assembly (9) and a dust seal (10) inside, and the shock-absorbing oil sealing assembly (9) is located below the dust seal (10). A guide sleeve (8) is fixedly installed inside the shock-absorbing oil sealing assembly (9). The upper sealing assembly mounting seat (21) is located between the dust seal (10) and the shock-absorbing oil sealing assembly (9). The piston rod (6) passes through the guide sleeve (8), the shock-absorbing oil sealing assembly (9) and the dust seal (10).

6. The anti-settlement structure of the double-fluid magnetorheological fluid damper according to claim 1, characterized in that: The gas cylinder (12) is provided with a shock-absorbing oil filling port (17) on the top, an air filling port (18) on the side of the gas cylinder (12), and a magnetorheological fluid filling port (19) at the bottom of the gas cylinder (12).

7. The anti-settlement structure of the double-fluid magnetorheological fluid damper according to claim 6, characterized in that: The gas cylinder (12) is provided with a turbulence valve plate (20) inside, and the turbulence valve plate (20) is located below the air bag (13). The turbulence valve plate (20) is in the shape of an inverted cone, and the top of the turbulence valve plate (20) is provided with an array of holes.

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