Magnetorheological damper

Abstract

The utility model belongs to the technical field of dampers, and particularly relates to a magnetorheological damper which comprises an outer cylinder, an inner cylinder is coaxially arranged in the outer cylinder, and a circulation channel is reserved between the outer side wall of the inner cylinder and the inner side wall of the outer cylinder. The circulating holes are formed in the top and the bottom of the side wall of the inner cylinder, and the circulating channel communicates with the interior of the inner cylinder through the circulating holes, so that the magnetorheological fluid circularly flows between the circulating channel and the interior of the inner cylinder; and the side wall of the inner cylinder is filled with the anti-freezing cooling liquid, and the anti-freezing cooling liquid is used for heat exchange with the magnetorheological fluid. According to the utility model, the problems of magnetorheological fluid sedimentation and temperature rise can be solved.

Description

Technical Field

[0001] This utility model belongs to the field of damper technology, and particularly relates to magnetorheological dampers. Background Technology

[0002] Traditional magnetorheological dampers suffer from performance degradation due to magnetorheological fluid sedimentation and coil temperature rise. While adding nanoparticles or modifying the magnetorheological fluid composition can partially alleviate sedimentation in existing technologies, these methods suffer from drawbacks such as high cost and reduced response speed. Furthermore, addressing the temperature rise issue with insulation materials or heat sinks can weaken the magnetic field strength or make the device susceptible to environmental corrosion.

[0003] Therefore, it is necessary to design magnetorheological dampers to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a magnetorheological damper to solve the above-mentioned problems and achieve the goal of solving the problems of magnetorheological fluid sedimentation and temperature rise.

[0005] To achieve the above objectives, this utility model provides the following solution: a magnetorheological damper, comprising an outer cylinder and an inner cylinder coaxially arranged inside, with a circulation channel between the outer side wall of the inner cylinder and the inner side wall of the outer cylinder; flow holes, formed at the top and bottom of the inner cylinder side wall, the flow holes connecting the circulation channel to the interior of the inner cylinder, so as to allow the magnetorheological fluid to circulate between the circulation channel and the interior of the inner cylinder; and antifreeze coolant, filled in the side wall of the inner cylinder, the antifreeze coolant being used to generate heat exchange with the magnetorheological fluid.

[0006] Based on the magnetorheological damper of this utility model, the number of flow holes is several, and the several flow holes are equally spaced along the circumferential direction of the inner cylinder sidewall.

[0007] Based on the magnetorheological damper of this invention, the flow hole is not connected to the interior of the side wall of the inner cylinder.

[0008] Based on the magnetorheological damper of this utility model, a piston is coaxially slidably arranged inside the inner cylinder, and both ends of the piston are fixedly connected to piston rods through piston heads.

[0009] Based on the magnetorheological damper of this utility model, both ends of the inner cylinder are provided with inner cylinder end caps, and both ends of the outer cylinder are provided with outer cylinder end caps. The piston rod slides through the inner cylinder end caps and the outer cylinder end caps.

[0010] Based on the magnetorheological damper of this invention, electromagnetic coils are provided at both ends of the outer side wall of the piston.

[0011] Based on the magnetorheological damper of this utility model, an energy storage device is provided at one end of the outer cylinder, and the energy storage device is located between the inner cylinder end cap and the outer cylinder end cap.

[0012] Based on the magnetorheological damper of this invention, a spring is provided on the outside of the outer cylinder.

[0013] Based on the magnetorheological damper of this invention, the antifreeze coolant is an ethylene glycol aqueous solution with a volume concentration of 50%.

[0014] Compared with the prior art, the present invention has the following advantages and technical effects: The present invention can promote the circulation and redispersion of magnetorheological fluid in the settling area while ensuring the maximum magnetic induction intensity of the damping gap, effectively alleviating the settling problem; by using the antifreeze coolant in the inner cylinder cavity to absorb heat, the temperature rise rate of the magnetorheological fluid is reduced by 19.28%, without affecting the magnetic induction intensity of the damping gap, significantly improving the working stability of the damper. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the present invention.

[0017] Figure 2 This is an internal sectional view of the present invention.

[0018] The components are: 1. Outer cylinder; 2. Inner cylinder; 3. Piston; 4. Electromagnetic coil; 5. Magnetorheological fluid; 6. Antifreeze coolant; 7. Circulation channel; 8. Inner cylinder end cap; 9. Outer cylinder end cap; 10. Spring; 11. Accumulator; 12. Piston head; 13. Flow hole; 14. Piston rod. Detailed Implementation

[0019] 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.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1 to 2 As shown, this utility model provides a magnetorheological damper, including an outer cylinder 1, an inner cylinder 2 coaxially arranged inside, and a circulation channel 7 between the outer side wall of the inner cylinder 2 and the inner side wall of the outer cylinder 1; a flow hole 13 is opened at the top and bottom of the side wall of the inner cylinder 2, and the flow hole 13 connects the circulation channel 7 with the interior of the inner cylinder 2 so that the magnetorheological fluid 5 circulates between the circulation channel 7 and the interior of the inner cylinder 2; and an antifreeze coolant 6 is filled in the side wall of the inner cylinder 2, and the antifreeze coolant 6 is used to generate heat exchange with the magnetorheological fluid 5.

[0022] The inner cylinder 2 has a side wall thickness of 2mm, the flow hole 13 has a diameter of 3mm, and the circulation channel 7 has a width of 3mm.

[0023] For magnetorheological fluid 5, MRF-A181 was selected.

[0024] Furthermore, there are several flow holes 13, which are evenly spaced along the circumferential direction of the inner cylinder 2 side wall.

[0025] Furthermore, the flow hole 13 is not connected to the interior of the side wall of the inner cylinder 2.

[0026] Furthermore, a piston 3 is coaxially slidably arranged inside the inner cylinder 2, and both ends of the piston 3 are fixedly connected to piston rods 14 through piston heads 12.

[0027] The piston head 12 is made of aluminum, and the piston rod 14 is made of 304 stainless steel.

[0028] Furthermore, both ends of the inner cylinder 2 are provided with inner cylinder end caps 8, and both ends of the outer cylinder 1 are provided with outer cylinder end caps 9. The piston rod 14 slides through the inner cylinder end caps 8 and the outer cylinder end caps 9.

[0029] The inner cylinder end cap 8 is equipped with a convection heat dissipation structure.

[0030] Furthermore, electromagnetic coils 4 are provided at both ends of the outer side wall of piston 3.

[0031] The electromagnetic coil 4 is made of copper and is wound around the outside of the piston 3. The electromagnetic coil 4 is electrically connected to an external electronic control device.

[0032] The outer cylinder 1, inner cylinder 2, and piston 3 are all made of No. 20 steel.

[0033] Furthermore, an accumulator 11 is provided at one end of the inner cylinder 1, and the accumulator 11 is located between the inner cylinder end cap 8 and the outer cylinder end cap 9.

[0034] Furthermore, a spring 10 is provided on the outside of the outer cylinder 1.

[0035] Furthermore, the antifreeze coolant 6 is an aqueous solution of ethylene glycol with a volume concentration of 50%.

[0036] During assembly, first wind the electromagnetic coil 4 around the designated position of the piston 3 according to the design requirements. Use No. 20 steel to make the inner cylinder 2 and outer cylinder 1. Machine a flow hole 13 at the bottom of the inner cylinder 2 and place the inner cylinder 2 into the outer cylinder 1. Make the piston 3 using No. 20 steel, install the piston head 12, and place the piston 3 inside the inner cylinder 2, ensuring smooth sliding. Connect the piston rod 14, made of 304 stainless steel, to the piston 3 and extend it out of the outer cylinder 1. Inject a 50% volume concentration ethylene glycol aqueous solution into the cavity on the side wall of the inner cylinder 2 as an antifreeze coolant 6. Fill the gap between the inner cylinder 2 and the outer cylinder 1, and the inside of the inner cylinder 2 with magnetorheological fluid 5. Finally, install the inner cylinder end cap 8 and the outer cylinder end cap 9 to complete the damper assembly.

[0037] The working principle of this invention is as follows: When the damper is working, the electromagnetic coil 4 is energized to generate a magnetic field, which changes the viscosity of the magnetorheological fluid 5 to provide damping force. During this process, the electromagnetic coil 4 heats up, and the antifreeze coolant 6 in the side wall of the inner cylinder 2 absorbs the heat, reducing the heating rate of the magnetorheological fluid 5. At the same time, the movement of the piston 3 causes the magnetorheological fluid 5 in the bottom settling area to flow into the circulation channel 7 through the flow hole 13 at the bottom of the inner cylinder 2 under pressure, and then flow out from the top of the circulation channel 7, thus achieving circulation and alleviating the settling problem.

[0038] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements to the technical solutions of the present utility model made by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope of the present utility model.

Claims

1. A magnetorheological damper, characterized in that, include An outer cylinder (1) is provided with an inner cylinder (2) coaxially arranged inside, and a circulation channel (7) is provided between the outer side wall of the inner cylinder (2) and the inner side wall of the outer cylinder (1); A flow hole (13) is provided at the top and bottom of the side wall of the inner cylinder (2). The flow hole (13) connects the circulation channel (7) with the interior of the inner cylinder (2) so that the magnetorheological fluid (5) circulates between the circulation channel (7) and the interior of the inner cylinder (2). Antifreeze coolant (6) is filled in the side wall of the inner cylinder (2) and is used to generate heat exchange with the magnetorheological fluid (5).

2. The magnetorheological damper according to claim 1, characterized in that, The number of flow holes (13) is several, and the flow holes (13) are equally spaced along the circumferential direction of the inner cylinder (2).

3. The magnetorheological damper according to claim 1, characterized in that, The flow hole (13) is not connected to the inside of the side wall of the inner cylinder (2).

4. The magnetorheological damper according to claim 1, characterized in that, A piston (3) is coaxially slidably disposed inside the inner cylinder (2), and both ends of the piston (3) are fixedly connected to piston rods (14) through piston heads (12).

5. The magnetorheological damper according to claim 4, characterized in that, The inner cylinder (2) is provided with an inner cylinder end cap (8) at both ends, and the outer cylinder (1) is provided with an outer cylinder end cap (9) at both ends. The piston rod (14) slides through the inner cylinder end cap (8) and the outer cylinder end cap (9).

6. The magnetorheological damper according to claim 4, characterized in that, Electromagnetic coils (4) are provided at both ends of the outer side wall of the piston (3).

7. The magnetorheological damper according to claim 5, characterized in that, An energy accumulator (11) is provided at one end of the inner cylinder (1), and the energy accumulator (11) is located between the inner cylinder end cap (8) and the outer cylinder end cap (9).

8. The magnetorheological damper according to claim 1, characterized in that, A spring (10) is provided on the outside of the outer cylinder (1).

9. The magnetorheological damper according to claim 1, characterized in that, The antifreeze coolant (6) is an aqueous solution of ethylene glycol with a volume concentration of 50%.

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